WO1991017820A1 - Method for formulating mixtures and installation for implementing same - Google Patents

Method for formulating mixtures and installation for implementing same Download PDF

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Publication number
WO1991017820A1
WO1991017820A1 PCT/FR1991/000395 FR9100395W WO9117820A1 WO 1991017820 A1 WO1991017820 A1 WO 1991017820A1 FR 9100395 W FR9100395 W FR 9100395W WO 9117820 A1 WO9117820 A1 WO 9117820A1
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WO
WIPO (PCT)
Prior art keywords
additive
sampling
storage means
rod
rinsing
Prior art date
Application number
PCT/FR1991/000395
Other languages
French (fr)
Inventor
Jacques Darmedru
Jacques Dognon
Marcel Prantoni
Bernard Robert
Original Assignee
Cellier
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cellier filed Critical Cellier
Priority to BR919105766A priority Critical patent/BR9105766A/en
Publication of WO1991017820A1 publication Critical patent/WO1991017820A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
    • B01F35/881—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise by weighing, e.g. with automatic discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying

Definitions

  • the present invention relates to the general technical field of producing and formulating mixtures for essentially industrial use, from components which must be mixed in defined proportions in order to produce the final mixture.
  • the invention relates, more specifically, but not exclusively, to the formulation of mixtures from components in the liquid phase and is more particularly concerned with obtaining mixtures used as industrial lubricants.
  • the formulation of Lubricant mixtures is obtained from several components consisting of a basic component, hereinafter called “base oil.” and at least one, or even several additional components, hereinafter called “additives”, intended to give the oil specific properties, such as anti-rust, anti-foam, anti-oxidant, dispersant properties, detergent and coloring in particular.
  • the base oil represents approximately 80% of the final mixture.
  • the various additives supplementing the formulation in complementary proportions can be very large, of the order, for example, from 1,000 to 30,000 liters, while the volumes of certain additives can be very small and, for example, from 1 'order of a few liters.
  • Lubricant mixtures with high viscosity, for example between 10 and 500 centipoise approximately, are obtained from base oil and additives stored individually in storage means, such as metal drums of variable volume.
  • the base oil is generally supplied from large-volume storage means, while the additives are stored in metallic drums of reduced volume, of the order of 200 Liters.
  • the conventional installations for producing the formulation and production of industrial lubricant mixtures, comprise, in addition to the storage means described above, components sampling stations including sampling rods, suction pumps or delivery and a set of transfer lines within which the components are directed to the common mixing unit.
  • the known conventional installations also include a buffer tank, provided with weighing means and connected, by transfer lines, to the sampling stations and to the mixing enclosure.
  • the installation is finally completed by a rinsing tank, also provided with weighing means and connected to the sampling station, the buffer tank and the mixing enclosure, via transfer lines.
  • the known sampling rods are mounted on a mobile assembly allowing an upward and downward movement of the rod for introduction and ' exit into the storage means, - as well as a possibility of rotation of the rod to allow its passage from a emptying position of a storage means at a rinsing position, in connection with the rinsing tank.
  • the adjustment of the formulation of a Lubricant mixture is carried out according to a process, now conventional, which consists in successively introducing into the mixing enclosure, the base oil and the additives, the quantity of which has been previously , determined by weighing in the r-buffer tank. Due to the incompatibility of certain additives, it is necessary to rinse the Transfer Line and the buffer tank between two successive additions of additives. This is done by removing the base oil 1 contained in the rinsing tank to the rinse buffer tank and, finally, transfer to the mixing enclosure.
  • This operation thus performs a base oil rinse of the buffer tank and transfer lines.
  • Known devices also use programmable logic controllers or microcomputers performing semi-automatic or automatic control of the movements of the rod, the rotation of the pumps and the opening or closing of the valves in the transfer lines. .
  • the conventional methods resort to determining the necessary quantities of additives and, optionally, base oils, by weighing a buffer tank whose large size, generally close to 1 to 3 tonnes, does not allow not the precise dosage of additives, some of which must be incorporated in very low doses, less than one liter.
  • the object of the present invention therefore aims to overcome the various drawbacks mentioned above and to propose a process for formulating a mixture allowing as complete control as possible of the composition of the final mixture, by precise control of the quantities of additives used.
  • Another object of the invention is to provide a method and an installation ensuring perfect control of the rinsing operation, without compromising the precision of the formulation.
  • Another object of the invention consists in proposing a method and a device making it possible to reduce the time necessary for the formulation of a mixture and to reduce the final cost of the mixture by appreciable reduction in the losses of components.
  • An additional object of the invention aims to propose a method and a device which significantly reduce the risks of environmental pollution.
  • the invention also relates to a sampling rod capable of ensuring the withdrawal of the various components of the mixture, without disturbing the precision and adjustment of the formulation.
  • the objectives assigned to the invention are achieved by a process for formulating a mixture from components, preferably liquids, including a base compound and at least one additive kept in separate storage means, from which they are sampled to be dosed and transferred, via transfer lines, to a common mixing enclosure consisting of:
  • the aims assigned to the invention are achieved by means of an installation for implementing the process intended for carrying out the formulation of a mixture from components, preferably liquids, including a base compound and at least one additive, said installation comprising:
  • sampling stations for each component provided with components sampling means, said sampling means being in relation to transfer lines leading to a common mixing enclosure and including a movable sampling rod intended to withdraw the components,
  • the sampling station for the additive comprises a continuous weighing means of the additive storage means, said weighing means being functionally connected to a control automaton responsible for controlling the nature of the additive and determining the quantity of additive withdrawn and ordering the withdrawal .
  • Fig. 1 shows a simplified diagram of a basic installation according to the invention.
  • Fig. 1_a_ represents a detail L of making a sampling station according to the invention.
  • Fig. 2 shows an alternative embodiment of an installation according to the invention.
  • Fig. 3 shows a general view of a sampling of the additive.
  • Fig. 4 shows a sectional view of a sampling rod according to the invention.
  • Fig. 5 shows, in a cross section, a detail of embodiment of a sampling rod according to the invention.
  • the -fig. 1 shows a formulation installation in accordance with the invention, particularly suitable for the formulation and production of lubricant mixtures from a base compound consisting of oil and various additives, intended to give the final mixture specific anti -red, anti-foam, anti-oxidant, dispersing, detergent and coloring, in particular.
  • the installation shown in fig. 1, comprises two components sampling stations, namely a station P .. for the sampling of the base oil and a station? -, for the sampling of at least one additive.
  • the post P .. connects storage means 1 the base oils, consisting, for example, of large-volume tanks, with a mixing enclosure 2 by means of a transfer line 3, in which at least one suction pump 4 and a valve 5 for closing and opening the transfer line 3 are incorporated.
  • the additive withdrawal station P connects the storage means 6 for the additives, generally made up of metal drums with a capacity of the order of 200 liters, with a withdrawal device 7 connected by a transfer line 8 at the mixing chamber 2.
  • the sampling device 7 consists of a sampling rod 11 connected, by a pipe 12, to a carriage 13 movable on a column 14 resting on the ground 15, by means of a base 16 (fig. 3) .
  • the column 14 is substantially vertical and the carriage 13 is removable, by
  • the displacements, of the carriage 13 and of the rod 11 which it carries, correspond to a displacement from bottom to top materialized, respectively, by the arrows i. and f-, and rotations around the main longitudinal axis of column 14, clockwise f, and counterclockwise f ".
  • the rotational movements of the rod 11 are limited to approximately 180.
  • the sampling device 7 is, moreover, connected to a suction pump 21 which can be fixed on the carriage and connected, by a connecting hose 22, to the transfer line 8.
  • the P sampling station ? is intended to ensure the withdrawal of the additives contained in the barrels 6, by means of the withdrawal rod 11 which is brought into contact with the additive by introduction into the barrel 6.
  • the sampling device 7 is arranged near a conveying device 23, preferably of the roller type, on which the drums 6 are arranged which are then automatically transferred to the sampling station P_ where they are brought in. fixed sampling position.
  • a weighing means 24, arranged for example at the end of the conveyor 23, is used so as to be able to weigh each drum 6 in the fixed sampling position and thus carry out, by weighing, control of the sampling of the quantity of additive withdrawn .
  • the weighing means 24 used are of known type and will not, in consequence, not described in detail.
  • provision is made for a system of mobile wedges capable of ensuring an inclination of the barrels 6 relative to the vertical, of the order of approximately 3 degrees. This inclination promotes the emptying of the drums 6.
  • This assembly can be completed by an automatic device for searching and unscrewing the bungs of each drum 6.
  • the withdrawal rod 11, shown in FIG. 4, is in the form of a tubular element 25, preferably cylindrical, surmounted by a bent part 26 ensuring the connection with the pipe 12.
  • the tubular element 25, intended to come into contact with the Liquid and to ensure the sampling said liquid, comprises, internally, a dip tube 27 passing right through, the tubular element 25 and the bent part 26 to open outside the rod 11.
  • the dip tube 27 is coaxial with
  • the tubular element 25 and the passage through the bent portion 26 is made hermetic by conventional interposition of seals.
  • the dip tube 27 is movable and is intended to slide with respect to the rod 11, along the longitudinal axis of the tubular element 25.
  • the upper part of the dip tube 27 comprises control means constituted by a control head 29, in bearing relation with a control cylinder 31, for example pneumatic, associated with three limit switches.
  • the movements of the dip tube 27 are thus under the dependence of the jack 31 which controls the sliding movement of the tube 27.
  • the lower part of the dip tube 27 is provided with a closing valve 28 intended to close off the lower end of the body. tubular 25, the lower part of which thus constitutes a receiving seat.
  • the jack 31 thus makes it possible to obtain three positions of the valve 28 corresponding to positions of total or average opening of said valve 28 and to a closed position.
  • the dip tube 27 has a passage 27a_ defining a tube formed in the thickness of its walls (fig. 5), connecting a chamber 34 formed in the volume internal of the head 29 to a spray nozzle, in the form of a hollow disc with two walls, for example, the upper face 28 of which assumes the function of a closing valve and the spray opening 28b of which extends the passage 27a.
  • the latter preferably defines, in a cross section, an annular space in the dip tube 27.
  • the chamber 34 is intended to be connected, by a pipe 35, to a means for storing the base oil. Thanks to this arrangement, the nozzle 28 is therefore capable of rinsing a barrel 6 by spraying the base oil.
  • a rod 41 is mounted with the possibility of longitudinal sliding.
  • the upper end of the rod 41 is constituted by an end piece 42 disposed in an upper chamber 33 delimited in the head 29 of the tubular body 27.
  • the end piece 42 bears against a compression means 43, of the helical spring type for example , resting against the upper wall of the chamber 33.
  • the endpiece 42 is, moreover, mounted near a sensor 45, for example of the inductive type, arranged, at least in part, in the chamber 33, which is, moreover, in relation, via a pipe 46, with a source of gas under pressure.
  • the pipe 46 is also connected to a differential pressure indicator 47.
  • the dimensions of the rod 41 are such that the lower end 41_a of the rod 41 protrudes from the dip tube 27 and the valve 28 in its position the lower.
  • the cross section of the rod 41 is, moreover, such that the pressurized fluid can circulate freely between the periphery of the rod 41 and the internal envelope 27b of the dip tube 27.
  • the assembly thus produced allows a free, elastic sliding of the rod 41 along its longitudinal axis and the detection of the liquid level by highlighting the pressure variation prevailing inside the chamber 33 in contact with the liquid.
  • the inductive sensor 45 also makes it possible to detect the bottom of the barrel 6 during the ascent of the rod 41, caused during the support of the end 4l against the bottom of the barrel 6.
  • the installation further comprises a rinsing station P_ including a rinsing tank 50 generally containing base oil and equipped with weighing means 51, a suction pump 52, means for agitation 53 and an evacuation pipe 54 towards the mixing enclosure 2.
  • the rod 11, movable on the column 14, can be immersed in the rinsing tank 50 and take the position shown in detail in FIG. 12 and indicated, in general, by Reference 55 in FIGS. 1 and 2.
  • the rinsing station P_ also comprises a circuit 56 for supplying from the suction of the pump 52.
  • the circuit 56 begins downstream of the pump 52, comprises a valve 57 and is intended to be connected to the chamber 34 by a connection hose 58 connected to the pipe 35.
  • the mixing enclosure comprises means for weighing 60 of its content, a stirring system, of the paddle type, for example, and means for controlling the temperature 62 of the mixture connected, functionally, to means for raising enclosure temperature 63.
  • An evacuation pump 64 and an evacuation pipe 65 complete the mixing station.
  • the installation described can, finally, be advantageously connected to a programmable controller or, even, to a microcomputer making it possible to automate, in a conventional manner.
  • the programmable controller or the microcomputer can, also, be used to regulate and control the progressive descent of the rod 11 inside a barrel 6, depending on the evolution or the emptying speed of said barrel or, again, the suction speed of The additive. It is then, in this case, to control the mechanical or electrical means ensuring the descent of the carriage 13 to a value proportional to the instantaneous and continuous evolution of emptying of the barrel 6, given by the evolution of the weight of the barrel 6.
  • the base oil is taken from the tank 1 by the pump 4 and the pipe 3.
  • the valve 5 is closed and the dosage of The additive can start.
  • the drums 6, circulating on the conveying device 23, are first identified, in order to determine and recognize, both, the type of additive to be dosed and the standard weight of the drum 6 concerned.
  • the position of the bungs is searched for manually or automatically and the bungs are unscrewed.
  • the sampling rod 11 is then put into action while the weighing operation begins, by the weighing means 24.
  • the sampling rod 11 is positioned above the barrel 6 and begins its descent while gas and, by example, pressurized air is sent, via the pipe 46, to the chamber 33, then to the interior of the dip tube 27, in order to determine the level of
  • the sampling rod 11 can be positioned and immersed, advantageously, only in the upper part of the liquid, in order to minimize the buoyancy of Archimedes in the liquid, with the aim of disturbing only very weakly the weighing carried out by the weighing means 24.
  • the partial immersion of the rod 11 in the upper part of the liquid, and for example of a few centimeters, also allows to limit the deposit of liquid on the rod, which correspondingly reduces the quantities of different liquids brought into contact in the rest of the process.
  • the cane must be successively immersed in several Liquids.
  • the weighing means 24 operates continuously and transmits, also continuously, the information relating to the evolution of the weight of the barrel which corresponds, very exactly, to the quantity of additive instantaneously withdrawn and transferred by the pipe 8 in the mixing enclosure 2.
  • the partial immersion of the cane 11 is also kept constant by the automatic device which controls and adapts the descent speed of the cane 11 as a function of the instantaneous quantity of additive taken.
  • the control automaton stops the pump 21 and the withdrawal by the sampling rod 11.
  • the automaton controls the transfer of the cane 11 to the tank 50 to rinse with base oil, by pump 21, the cane 11 and the pipe 8.
  • the quantity of base oil taken from the rinsing tank 50 for this rinsing phase is taken into account by the weighing device 51 and can therefore be included in the calculation of the base oil-additive ratio. If it turns out during the additive removal operation that the weighing means 24 or that the rod 41 has revealed the presence of the bottom of the barrel 6, the valve 28 is closed and the pump 21 is stopped.
  • the rod 11 is then placed in the high position in the barrel 6 and the pump 52 is started.
  • the opening of the valve 57 causes the injection of base oil into the line 56 connected to the line 35 and, finally, the injection of base oil through the spray opening 28b to rinse the barrel. 6.
  • the rod 11 is then gradually lowered to the bottom of the barrel 6.
  • the pump 52 is stopped and the pump 21 is started.
  • the valve 28 is open to allow pumping of the rinsing base oil mixed with the residue of additive which was present in the barrel 6.
  • the valve 28 is closed , the pump 21 is stopped and the rod 11 raised.
  • Fig. 2 shows an alternative embodiment which does not differ from the installation described in FIG. 1 only by the incorporation of a buffer tank 70, also provided with weighing means 71, and capable of being connected, by transfer lines 72, to at least one other additive (A,., A ?, ).
  • the buffer tank 70 can also advantageously be connected by a pipe 74 to another source of rinsing oil _R or else be connected by a pipe 74a to the rinsing tank 50.
  • the buffer tank 70 is connected by a Transfer line 75, to the mixing enclosure 2, and, via line 8, to a sampling rod 11.
  • a bypass 76 allows the direct transfer of the additive withdrawn by the rod 11 to the mixing enclosure 2 , without going through the buffer tank 70.
  • the installation shown in fig. 2, operates in a manner equivalent to the main variant, while making it possible to ensure the simultaneous dosing or not of several additives, by using the capacity of the buffer tank 70 to better manage the dosing operation by reducing as much as possible downtime.
  • the dosage of a first additive being carried out according to the method described above
  • a second additive withdrawn by the pipe 72
  • the dosage of another additive can be carried out according to the same method as described above, that is to say with the aid of a withdrawal cane withdrawing the additive weighed continuously in a barrel 6 and directing it directly to the mixer 2.
  • the direct weighing of an additive drum at a specific station allows the buffer tank to be reserved for weighing other additives, or even weighing the base oil, which saves a considerable amount of time and reduces the total duration of the formulation cycle.
  • the invention finds an advantageous application in the formulation of lubricants containing additives in a relatively small proportion compared to the total amount obtained.

Abstract

A method for making mixtures of several constituents. The method is characterized in that it involves: drawing off a portion of at least one additive from its storage device (6); continuously weighing the storage device (6) during this process; determining the amount of additive drawn off from said device by monitoring the changes in the weight thereof throughout said process; halting said process once the required amount has been drawn off; and transferring said additive to the mixing enclosure (2). The method can be used to make mixtures to produce lubricants, paints, inks or pharmaceutical or para-pharmaceutical compounds.

Description

PROCEDE POUR LA FORMULATION DE MELANGES ET INSTALLATION POUR SA MISE EN OEUVRE PROCESS FOR FORMULATING MIXTURES AND INSTALLATION FOR IMPLEMENTING SAME
DOMAINE TECHNIQUE :TECHNICAL AREA :
La présente invention concerne Le domaine technique général de La réalisation et de la formulation de méLanges à usage essentieLLement industriel, à partir de composants qui doivent être mélangés dans des proportions définies pour réaliser le mélange final.The present invention relates to the general technical field of producing and formulating mixtures for essentially industrial use, from components which must be mixed in defined proportions in order to produce the final mixture.
L'invention vise, plus spécifiquement, mais non exclusivement, la formulation de mélanges à partir de composants en phase Liquide et s'attache, plus particulièrement, à L'obtention de méLanges utilisés en tant que lubrifiants industriels. La formulation de mélanges Lubrifiants est obtenue à partir de plusieurs composants constitués d'un composant de base, ci-après dénommé "huile de base." et d'au moins un, voire plusieurs composants additionnels, ci-après dénommés "additifs", destinés à donner à l'huile des propriétés particulières, telles que des propriétés anti-roui lie, anti-mousse, anti-oxydante, dispersante, détergente et colorante notamment.The invention relates, more specifically, but not exclusively, to the formulation of mixtures from components in the liquid phase and is more particularly concerned with obtaining mixtures used as industrial lubricants. The formulation of Lubricant mixtures is obtained from several components consisting of a basic component, hereinafter called "base oil." and at least one, or even several additional components, hereinafter called "additives", intended to give the oil specific properties, such as anti-rust, anti-foam, anti-oxidant, dispersant properties, detergent and coloring in particular.
En règle générale, L'huile de base représente environ 80 % du mélange final. Les différents additifs complétant La formulation dans des proportions complémentaires. Il doit être noté que Les quantités finales des mélanges obtenus peuvent être très importantes, de l'ordre, par exemple, de 1 000 à 30 000 litres, alors que Les volumes de certains additifs peuvent être très faibles et, par exemple, de l'ordre de quelques litres.As a general rule, the base oil represents approximately 80% of the final mixture. The various additives supplementing the formulation in complementary proportions. It should be noted that the final quantities of the mixtures obtained can be very large, of the order, for example, from 1,000 to 30,000 liters, while the volumes of certain additives can be very small and, for example, from 1 'order of a few liters.
Les méLanges Lubrifiants, à viscosité élevée, comprise, par exemple, entre 10 et 500 centipoises environ, sont obtenus à partir d'huile de base et d'additifs stockés individuellement dans des moyens de stockage, tels des fûts métalliques de volume variable. Dans L'application préférentielle aux lubrifiants industriels, l'huile de base est, généralement, fournie à partir de moyens de stockage de grand volume, alors que les additifs sont stockés dans des fûts métalliques de volume plus réduit, de l'ordre de 200 Litres.Lubricant mixtures, with high viscosity, for example between 10 and 500 centipoise approximately, are obtained from base oil and additives stored individually in storage means, such as metal drums of variable volume. In the preferential application to industrial lubricants, the base oil is generally supplied from large-volume storage means, while the additives are stored in metallic drums of reduced volume, of the order of 200 Liters.
TECHNIQUE ANTERIEURE :PRIOR TECHNIQUE:
Les installations classiques, connues à ce jour, pour réaliser La formulation et La réalisation de mélanges Lubrifiants industriels, comprennent, en plus des moyens de stockage précédemment décrits, des postes de prélèvement des composants incluant des cannes de prélèvement, des pompes d'aspiration ou de refoulement et un ensemble de Lignes de transfert à l'intérieur desquelles Les composants sont dirigés vers L'unité commune de mélange. Les installations classiques connues comportent, également, un réservoir-tampon, muni de moyens de pesée et relié, par des lignes de transfert, aux postes de prélèvement et à l'enceinte de mélange. L'installation est enfin complétée par un bac de rinçage, également muni de moyens de pesée et relié au poste de prélèvement, au réservoir-tampon et à l'enceinte de mélange, par l'intermédiaire de Lignes de transfert. Les cannes de prélèvement connues sont montées sur un ensemble mobile permettant un déplacement en montée et descente de La canne pour introduction et' sortie dans les moyens de stockage,- ainsi qu'une possibilité de rotation de La canne pour permettre son passage d'une position de vidage d'un moyen de stockage à une position de rinçage, en Liaison avec le bac de rinçage.The conventional installations, known to date, for producing the formulation and production of industrial lubricant mixtures, comprise, in addition to the storage means described above, components sampling stations including sampling rods, suction pumps or delivery and a set of transfer lines within which the components are directed to the common mixing unit. The known conventional installations also include a buffer tank, provided with weighing means and connected, by transfer lines, to the sampling stations and to the mixing enclosure. The installation is finally completed by a rinsing tank, also provided with weighing means and connected to the sampling station, the buffer tank and the mixing enclosure, via transfer lines. The known sampling rods are mounted on a mobile assembly allowing an upward and downward movement of the rod for introduction and ' exit into the storage means, - as well as a possibility of rotation of the rod to allow its passage from a emptying position of a storage means at a rinsing position, in connection with the rinsing tank.
L'ajustement de la formulation d'un mélange Lubrifiant est effectué selon un procédé, désormais classique, qui consiste à introduire, successivement, dans l'enceinte de mélange, l'huile de base et les additifs dont La quantité a été, au préalable, déterminée par pesage dans le réservo r-tampon. En raison de L'incompatibilité de certains additifs, il est nécessaire d'effectuer un rinçage de la Ligne de transfert et du réservoir- tampon entre deux introductions successives d'additifs. Cette opération est effectuée par prélèvement de l1huile de base contenue dans Le bac de rinçage vers le réservoir-tampon pour rinçage et, enfin, tranfert dans l'enceinte de mélange.The adjustment of the formulation of a Lubricant mixture is carried out according to a process, now conventional, which consists in successively introducing into the mixing enclosure, the base oil and the additives, the quantity of which has been previously , determined by weighing in the r-buffer tank. Due to the incompatibility of certain additives, it is necessary to rinse the Transfer Line and the buffer tank between two successive additions of additives. This is done by removing the base oil 1 contained in the rinsing tank to the rinse buffer tank and, finally, transfer to the mixing enclosure.
Par cette opération on effectue ainsi un rinçage à l'huile de base du réservoir-tampon et des lignes transfert.This operation thus performs a base oil rinse of the buffer tank and transfer lines.
Les dispositifs connus mettent, également, en oeuvre des automates programmables ou des micro-ordinateurs effectuant La commande semi-automatique ou automatique des mouvements de La canne, de La rotation des pompes et de L'ouverture ou fermeture des vannes dans Les lignes de transfert.Known devices also use programmable logic controllers or microcomputers performing semi-automatic or automatic control of the movements of the rod, the rotation of the pumps and the opening or closing of the valves in the transfer lines. .
Les procédés classiques de formulation de méLanges lubrifiants, ainsi que leurs installations de mise en oeuvre, tels que décrits ci-dessus, permettent, certes, d'obtenir des mélanges de lubrifiants répondant à un certain nombre d'exigences minimales de formulation, mais il s'avère difficile d'obtenir des Lubrifiants industriels.de qualité et de précision d'ajustement constante.The conventional methods for formulating lubricant mixtures, as well as their processing facilities, as described above, certainly make it possible to obtain mixtures of lubricants which meet a certain number of minimum formulation requirements, but it proves difficult to obtain Industrial Lubricants. of quality and precision of constant adjustment.
En effet, Les procédés classiques ont recours à la détermination des quantités nécessaires d'additifs et, éventuellement, d'huiles de base, par pesage d'un réservoir-tampon dont La taille importante, généralement voisine de 1 à 3 tonnes, ne permet pas le dosage précis d'additifs dont certains doivent être incorporés à des doses très faibles, inférieures à un litre.In fact, the conventional methods resort to determining the necessary quantities of additives and, optionally, base oils, by weighing a buffer tank whose large size, generally close to 1 to 3 tonnes, does not allow not the precise dosage of additives, some of which must be incorporated in very low doses, less than one liter.
Par ailleurs, le rinçage de La Ligne de transfert à l'huile de base, après introduction d'un additif, ajoute à cette imprécision en envoyant, dans Le réservoir-tampon, une quantité mal connue de liquide correspondant au volume de la Ligne de transfert. Les procédés classiques, connus à ce jour, s'avèrent également être La cause d'une pollution de l'environnement non négligeable, dans la mesure où ls ne prévoient aucun moyen de contrôle du vidage des fûts contenant Les additifs, lesquels sont, le plus souvent, jetés ou abandonnés, alors qu'ils contiennent toujours un reliquat d'additifs. Le rejet dans La nature d'un tel composant est, non seulement, une source de pollution, mais, encore, une perte coûteuse de matières premières.Furthermore, rinsing the transfer line with base oil, after the introduction of an additive, adds to this imprecision by sending, to the buffer tank, an ill-known quantity of liquid corresponding to the volume of the line. transfer. The conventional processes, known to date, also prove to be the cause of significant environmental pollution, insofar as they do not provide any means of controlling the emptying of the drums containing the additives, which are the more often, discarded or abandoned, while they still contain a balance of additives. The rejection in nature of such a component is not only a source of pollution, but also an expensive loss of raw materials.
L'objet de la présente invention vise, en conséquence, à pallier les différents inconvénients mentionnés ci-dessus et à proposer un procédé de formulation d'un mélange permettant une maîtrise aussi complète que possible de La composition du mélange final, par contrôle précis des quantités d'additifs utilisées.The object of the present invention therefore aims to overcome the various drawbacks mentioned above and to propose a process for formulating a mixture allowing as complete control as possible of the composition of the final mixture, by precise control of the quantities of additives used.
Un autre objet de L'invention est de proposer un procédé et une installation assurant la maîtrise parfaite de l'opération de rinçage, sans nuire à la précision de La formulation.Another object of the invention is to provide a method and an installation ensuring perfect control of the rinsing operation, without compromising the precision of the formulation.
Un autre objet de l'invention consiste à proposer un procédé et un dispositif permettant de réduire le temps nécessaire à la formulation d'un- élange et de réduire le coût final du mélange par diminution notable des pertes en composants.Another object of the invention consists in proposing a method and a device making it possible to reduce the time necessary for the formulation of a mixture and to reduce the final cost of the mixture by appreciable reduction in the losses of components.
Un objet supplémentaire de L'invention vise à proposer un procédé et un dispositif réduisant notablement Les risques de pollution de L'environnement.An additional object of the invention aims to propose a method and a device which significantly reduce the risks of environmental pollution.
L'invention concerne, également, une canne de prélèvement apte à assurer le soutirage des divers composants du mélange, sans perturber La précision et L'ajustement de la formulation.The invention also relates to a sampling rod capable of ensuring the withdrawal of the various components of the mixture, without disturbing the precision and adjustment of the formulation.
EXPOSE DE L'INVENTION :PRESENTATION OF THE INVENTION:
Les objectifs assignés à L'invention sont atteints par un procédé de formulation d'un mélange à partir de composants, de préférence liquides, incluant un composé de base et au moins un additif conservés dans des moyens de stockage distincts, à partir desquels ils sont prélevés pour être dosés et transférés, par l'intermédiaire de lignes de tranfert, dans une enceinte commune de mélange consistant :The objectives assigned to the invention are achieved by a process for formulating a mixture from components, preferably liquids, including a base compound and at least one additive kept in separate storage means, from which they are sampled to be dosed and transferred, via transfer lines, to a common mixing enclosure consisting of:
- à assurer le prélèvement d'au moins un additif à partir de son moyen de stockage,- ensuring the removal of at least one additive from its storage means,
- à peser en continu, lors du prélèvement, le moyen de stockage,- to weigh continuously, during the collection, the storage means,
- à déterminer, par contrôle de La variation de poids du moyen de stockage pendant Le prélèvement, La quantité d'additif prélevée,- to determine, by checking the variation in weight of the storage means during sampling, the quantity of additive removed,
- à arrêter le prélèvement Lorsque La quantité nécessaire d'additif a été prélevée et à La transférer vers L'enceinte de mélange. Les buts assignés à L'invention sont atteints grâce à une installation de mise en oeuvre du procédé destinée à réaliser la formulation d'un mélange à partir de composants, de préférence liquides, incluant un composé de base et au moins un additif, ladite installation comportant :- to stop the withdrawal When the necessary quantity of additive has been withdrawn and to transfer to the mixing chamber. The aims assigned to the invention are achieved by means of an installation for implementing the process intended for carrying out the formulation of a mixture from components, preferably liquids, including a base compound and at least one additive, said installation comprising:
- des moyens de stockage des composants,- means for storing the components,
- des postes de prélèvement pour chaque composant, munis de moyens de prélèvement des composants, lesdits moyens de prélèvement étant en relation avec des lignes de transfert aboutissant à une enceinte commune de mélange et incluant une canne de prélèvement déplaçable destinée à soutirer les composants,- sampling stations for each component, provided with components sampling means, said sampling means being in relation to transfer lines leading to a common mixing enclosure and including a movable sampling rod intended to withdraw the components,
- un bac de rinçage relié à l'enceinte de mélange et susceptible d'être connecté à La canne de prélèvement, par l'intermédiaire d'un chariot mobile, ladite installation étant caractérisé en ce que le poste de prélèvement de L'additif comporte un moyen de pesée en continu du moyen de stockage de l'additif, ledit moyen de pesée étant relié fonctionnellement à un automate de contrôle chargé de contrôler la nature de l'additif et de déterminer La quantité d'additif prélevée et de commander le prélèvement.- a rinsing tank connected to the mixing enclosure and capable of being connected to the sampling rod, via a mobile carriage, said installation being characterized in that the sampling station for the additive comprises a continuous weighing means of the additive storage means, said weighing means being functionally connected to a control automaton responsible for controlling the nature of the additive and determining the quantity of additive withdrawn and ordering the withdrawal .
BREVE DESCRIPTION DES DESSINS :BRIEF DESCRIPTION OF THE DRAWINGS:
Diverses autres caractéristiques ressortent de la description faite ci-dessous en référence aux dessins annexés qui montrent, à titre d'exemples non limitatifs, des formes de réalisation de l'objet de L'invention.Various other characteristics will emerge from the description given below with reference to the appended drawings which show, by way of nonlimiting examples, embodiments of the subject of the invention.
La fig. 1 représente un schéma simplifié d'une installation de base conforme à l'invention.Fig. 1 shows a simplified diagram of a basic installation according to the invention.
La fig. 1_a_ représente un détai L de réalisation d'un poste de prélèvement selon L'invention.Fig. 1_a_ represents a detail L of making a sampling station according to the invention.
La fig. 2 représente une variante de réalisation d'une installation conforme à l'invention. La fig. 3 représente une vue générale d'un poste de prélèvement de l'additif.Fig. 2 shows an alternative embodiment of an installation according to the invention. Fig. 3 shows a general view of a sampling of the additive.
La fig. 4 présente une vue en coupe d'une canne de prélèvement conforme à l'invention.Fig. 4 shows a sectional view of a sampling rod according to the invention.
La fig. 5 montre, selon une coupe transversale, un détail de réalisation d'une canne de prélèvement conforme à L'invention.Fig. 5 shows, in a cross section, a detail of embodiment of a sampling rod according to the invention.
MEILLEURE MANIERE DE REALISER L'INVENTION :BEST WAY TO IMPLEMENT THE INVENTION:
La -fig. 1 représente une installation de formulation conforme à L'invention, particulièrement adaptée pour La formulation et réalisation de mélanges lubrifiants à partir d'un composé de base constitué d'huile et d'additifs divers, destinés à conférer au mélange final des propriétés spécifiques anti-roui lie, anti-mousse, anti-oxydante, dispersante, détergente et colorante, notamment.The -fig. 1 shows a formulation installation in accordance with the invention, particularly suitable for the formulation and production of lubricant mixtures from a base compound consisting of oil and various additives, intended to give the final mixture specific anti -red, anti-foam, anti-oxidant, dispersing, detergent and coloring, in particular.
Les exemples de réalisation décrits ci-après se référeront tous à La formulation de méLanges Lubrifiants mais il est bien entendu que L'objet de L'invention n'est pas limité à cette application spécifique et que le procédé et L'installation décrits peuvent être utilisés pour obtenir d'autres mélanges à partir de composés liquides, de toutes sortes, ou même à partir de composés pulvérulents, poudreux, voire granulés. De la même façon, il est envisageable d'étendre l'objet de L'invention à La formulation de peintures, d'encres ou de mélanges relevant du -domaine de La pharmacie ou para-pharmacie.The embodiments described below will all refer to the formulation of lubricant mixtures, but it is understood that the object of the invention is not limited to this specific application and that the process and the installation described can be used to obtain other mixtures from liquid compounds of all kinds, or even from pulverulent, powdery or even granular compounds. Similarly, it is possible to extend the subject of the invention to the formulation of paints, inks or mixtures falling within the domain of pharmacy or para-pharmacy.
L'installation, représentée à La fig. 1, comporte deux postes de prélèvement de composants, à savoir un poste P.. pour le prélèvement de L'huile de base et un poste ?-, pour Le prélèvement d'au moins un additif. Le poste P.. met en relation des moyens de stockage 1 l'huiles de base, constitués, par exemple, de citernes de grand volume, avec une enceinte 2 de mélange par l'intermédiaire d'une ligne de transfert 3, dans Laquelle est incorporée au moins une pompe d'aspiration 4 et une vanne 5 de fermeture et d'ouverture de la ligne de transfert 3. Le poste P de prélèvement de L'additif met en relation les moyens de stockage 6 des additifs, généralement constitués de fûts métalliques d'une contenance de l'ordre de 200 Litres, avec un dispositif de prélèvement 7 relié par une ligne de transfert 8 à L'enceinte de mélange 2.The installation, shown in fig. 1, comprises two components sampling stations, namely a station P .. for the sampling of the base oil and a station? -, for the sampling of at least one additive. The post P .. connects storage means 1 the base oils, consisting, for example, of large-volume tanks, with a mixing enclosure 2 by means of a transfer line 3, in which at least one suction pump 4 and a valve 5 for closing and opening the transfer line 3 are incorporated. The additive withdrawal station P connects the storage means 6 for the additives, generally made up of metal drums with a capacity of the order of 200 liters, with a withdrawal device 7 connected by a transfer line 8 at the mixing chamber 2.
Le dispositif de prélèvement 7 est constitué d'une canne de prélèvement 11 reliée, par une conduite 12, à un chariot 13 mobile sur une colonne 14 reposant sur Le sol 15, par L'intermédiaire d'une embase 16 (fig. 3). La colonne 14 est sensiblement verticale et le chariot 13 est dépLaçable, parThe sampling device 7 consists of a sampling rod 11 connected, by a pipe 12, to a carriage 13 movable on a column 14 resting on the ground 15, by means of a base 16 (fig. 3) . The column 14 is substantially vertical and the carriage 13 is removable, by
L'intermédiaire d'organes d'entraînement 17 et 18, par rapport à la colonne 14. Les déplacements, du chariot 13 et de La canne 11 qu'il porte, correspondent à un déplacement de bas en haut matérialisé, respectivement, par Les flèches i. et f-, et à des rotations autour de L'axe principal longitudinal de la colonne 14, dans le sens horaire f, et dans le sens anti-horaire f».The intermediary of drive members 17 and 18, relative to the column 14. The displacements, of the carriage 13 and of the rod 11 which it carries, correspond to a displacement from bottom to top materialized, respectively, by the arrows i. and f-, and rotations around the main longitudinal axis of column 14, clockwise f, and counterclockwise f ".
En pratique. Les déplacements en rotation de la canne 11 sont limités à environ 180 . Le dispositif de prélèvement 7 est, par ailleurs, relié à une pompe d'aspiration 21 qui peut être fixée sur le chariot et raccordée, par un flexible de liaison 22, à La Ligne de transfert 8.In practice. The rotational movements of the rod 11 are limited to approximately 180. The sampling device 7 is, moreover, connected to a suction pump 21 which can be fixed on the carriage and connected, by a connecting hose 22, to the transfer line 8.
Le poste de prélèvement P? est destiné à assurer le soutirage des additifs contenus dans Les fûts 6, par L'intermédiaire de la canne de soutirage 11 qui est mise en contact avec l'additif par introduction dans le fût 6.The P sampling station ? is intended to ensure the withdrawal of the additives contained in the barrels 6, by means of the withdrawal rod 11 which is brought into contact with the additive by introduction into the barrel 6.
A cette fin, Le dispositif de prélèvement 7 est disposé à proximité d'un dispositif de convoyage 23, de préférence du type à rouleaux, sur lequel sont disposés les fûts 6 qui sont alors transférés automatiquement au poste de prélèvement P_ où ils sont amenés en position fixe de prélèvement. Un moyen de pesage 24 , disposé par exemple à l'extrémité du convoyeur 23, est utilisé de manière à pouvoir peser chaque fût 6 en position fixe de prélèvement et effectuer ainsi, par dépesée, Le contrôle du prélèvement de la quantité d'additif prélevée. Les moyens de pesage 24 utilisés sont de type connus et ne seront, en conséquence, pas décrits en détail. Avantageusement, on prévoit un système de cales mobiles aptes à assurer une inclinaison des fûts 6 par rapport à La verticale, de L'ordre de 3 degrés environ. Cette inclinaison favorise Le vidage des fûts 6. Cet ensemble peut être complété par un dispositif automatique de recherche et de dévissage des bondes de chaque fût 6.To this end, the sampling device 7 is arranged near a conveying device 23, preferably of the roller type, on which the drums 6 are arranged which are then automatically transferred to the sampling station P_ where they are brought in. fixed sampling position. A weighing means 24, arranged for example at the end of the conveyor 23, is used so as to be able to weigh each drum 6 in the fixed sampling position and thus carry out, by weighing, control of the sampling of the quantity of additive withdrawn . The weighing means 24 used are of known type and will not, in consequence, not described in detail. Advantageously, provision is made for a system of mobile wedges capable of ensuring an inclination of the barrels 6 relative to the vertical, of the order of approximately 3 degrees. This inclination promotes the emptying of the drums 6. This assembly can be completed by an automatic device for searching and unscrewing the bungs of each drum 6.
La canne de soutirage 11, représentée à la fig. 4, se présente sous la forme d'un élément tubulaire 25, de préférence cylindrique, surmonté par une partie coudée 26 assurant la liaison avec la conduite 12. L'élément tubulaire 25, destiné à entrer en contact avec le Liquide et à assurer le prélèvement dudit liquide, comporte, intérieurement, un tube plongeur 27 traversant, de part en part, l'élément tubulaire 25 et la partie coudée 26 pour déboucher à l'extérieur de la canne 11. De préférence, le tube plongeur 27 est coaxial avec L'élément tubulaire 25 et Le passage à travers La partie coudée 26 est rendu hermétique par interposition classique de joints. Le tube plongeur 27 est mobile et est destiné à coulisser par rapport à la canne 11, selon L'axe Longitudinal de L'élément tubulaire 25. La partie supérieure du tube plongeur 27 comporte des moyens de commande constitués par une tête de commande 29, en relation d'appui avec un vérin de commande 31, par exemple pneumatique, associé avec trois indicateurs fins de course. Les mouvements du tube plongeur 27 sont ainsi sous La dépendance du vérin 31 qui commande Le déplacement en coulissement du tube 27. La partie inférieure du tube plongeur 27 est munie d'un clapet de fermeture 28 destiné à venir obturer l'extrémité inférieure du corps tubulaire 25 dont La partie inférieure constitue ainsi un siège de réception. En association avec les trois indicateurs de fin de course, Le vérin 31 permet ainsi d'obtenir trois positions du clapet 28 correspondant à des positions d'ouverture totale ou moyenne dudit clapet 28 et à une position de fermeture.The withdrawal rod 11, shown in FIG. 4, is in the form of a tubular element 25, preferably cylindrical, surmounted by a bent part 26 ensuring the connection with the pipe 12. The tubular element 25, intended to come into contact with the Liquid and to ensure the sampling said liquid, comprises, internally, a dip tube 27 passing right through, the tubular element 25 and the bent part 26 to open outside the rod 11. Preferably, the dip tube 27 is coaxial with The tubular element 25 and the passage through the bent portion 26 is made hermetic by conventional interposition of seals. The dip tube 27 is movable and is intended to slide with respect to the rod 11, along the longitudinal axis of the tubular element 25. The upper part of the dip tube 27 comprises control means constituted by a control head 29, in bearing relation with a control cylinder 31, for example pneumatic, associated with three limit switches. The movements of the dip tube 27 are thus under the dependence of the jack 31 which controls the sliding movement of the tube 27. The lower part of the dip tube 27 is provided with a closing valve 28 intended to close off the lower end of the body. tubular 25, the lower part of which thus constitutes a receiving seat. In association with the three end-of-travel indicators, the jack 31 thus makes it possible to obtain three positions of the valve 28 corresponding to positions of total or average opening of said valve 28 and to a closed position.
Avantageusement, le tube plongeur 27 comporte un passage 27a_ définissant une tubulure ménagée dans l'épaisseur de ses parois (fig. 5), reliant une chambre 34 ménagée dans le volume interne de La tête 29 à une buse de pulvérisation, en forme de disque creux à deux parois, par exemple, dont La face supérieure 28 assume La fonction de clapet de fermeture et dont l'ouverture de pulvérisation 28b prolonge Le passage 27a. Ce dernier définit, de préférence, selon une coupe transversale, un espace annulaire dans le tube plongeur 27. La chambre 34 est destinée à être reliée, par une canaLisation 35, à un moyen de stockage de l'huile de base. Grâce à ce montage, la buse 28 est donc susceptible d'assurer le rinçage d'un fût 6 par pulvérisation de l'huile de base.Advantageously, the dip tube 27 has a passage 27a_ defining a tube formed in the thickness of its walls (fig. 5), connecting a chamber 34 formed in the volume internal of the head 29 to a spray nozzle, in the form of a hollow disc with two walls, for example, the upper face 28 of which assumes the function of a closing valve and the spray opening 28b of which extends the passage 27a. The latter preferably defines, in a cross section, an annular space in the dip tube 27. The chamber 34 is intended to be connected, by a pipe 35, to a means for storing the base oil. Thanks to this arrangement, the nozzle 28 is therefore capable of rinsing a barrel 6 by spraying the base oil.
A l'intérieur du volume cylindrique, défini par le tube plongeur 27, une tige 41 est montée avec possibilité de coulissement Longitudinal. L'extrémité supérieure de La tige 41 est constituée par un embout 42 disposé dans une chambre supérieure 33 délimitée dans la tête 29 du corps tubulaire 27. L'embout 42 est en appui contre un moyen de compression 43, du type ressort hélicoïdal par exemple, reposant contre La paroi supérieure de la chambre 33. L'embout 42 est, par ailleurs, monté à proximité d'un capteur 45, par exemple du type inductif, disposé, au moins en partie, dans la chambre 33, Laquelle est, par ailleurs, en relation, par une canalisation 46, avec une source de gaz sous pression. La canaLisation 46 est, en outre, reliée à un indicateur de pression différentielle 47. Les dimensions de la tige 41 sont telles que l'extrémité inférieure 41_a de La tige 41 fait saillie hors du tube plongeur 27 et du clapet 28 dans sa position la plus basse. La section transversale de la tige 41 est, par ailleurs, telle que le fluide sous pression peut circuler librement entre La périphérie de La tige 41 et L'enveloppe interne 27b du tube plongeur 27. Le montage réalisé permet ainsi un coulissement libre, élastique de la tige 41 selon son axe Longitudinal et la détection du niveau de liquide par mise en évidence de la variation de pression régnant à L'intérieur de La chambre 33 au contact du Liquide. Le capteur inductif 45 permet, en outre, la détection du fond du fût 6 Lors de La remontée de La tige 41, causée Lors de l'appui de l'extrémité 4l contre le fond du fût 6.Inside the cylindrical volume, defined by the dip tube 27, a rod 41 is mounted with the possibility of longitudinal sliding. The upper end of the rod 41 is constituted by an end piece 42 disposed in an upper chamber 33 delimited in the head 29 of the tubular body 27. The end piece 42 bears against a compression means 43, of the helical spring type for example , resting against the upper wall of the chamber 33. The endpiece 42 is, moreover, mounted near a sensor 45, for example of the inductive type, arranged, at least in part, in the chamber 33, which is, moreover, in relation, via a pipe 46, with a source of gas under pressure. The pipe 46 is also connected to a differential pressure indicator 47. The dimensions of the rod 41 are such that the lower end 41_a of the rod 41 protrudes from the dip tube 27 and the valve 28 in its position the lower. The cross section of the rod 41 is, moreover, such that the pressurized fluid can circulate freely between the periphery of the rod 41 and the internal envelope 27b of the dip tube 27. The assembly thus produced allows a free, elastic sliding of the rod 41 along its longitudinal axis and the detection of the liquid level by highlighting the pressure variation prevailing inside the chamber 33 in contact with the liquid. The inductive sensor 45 also makes it possible to detect the bottom of the barrel 6 during the ascent of the rod 41, caused during the support of the end 4l against the bottom of the barrel 6.
L'installation comporte, en outre, un poste de rinçage P_ incluant un bac de rinçage 50 contenant, généralement, de L'huile de base et équipé de moyens de pesée 51, d'une pompe d'aspiration 52, de moyens d'agitation 53 et d'une canalisation d'évacuation 54 vers l'enceinte de mélange 2. La canne 11, mobile sur La colonne 14, peut être immergée dans Le bac de rinçage 50 et prendre La position montrée en détail à la fig. 12 et indiquée, de manière générale, par La référence 55 aux fig. 1 et 2. Le poste de rinçage P_ comporte, également, un circuit 56 d'alimentation à partir de l'aspiration de La pompe 52. Le circuit 56 débute en aval de la pompe 52, comporte une vanne 57 et est destiné à être connecté à La chambre 34 par un flexible de raccordement 58 branché sur la canalisation 35. Une telle disposition permet à la canne de prélèvementThe installation further comprises a rinsing station P_ including a rinsing tank 50 generally containing base oil and equipped with weighing means 51, a suction pump 52, means for agitation 53 and an evacuation pipe 54 towards the mixing enclosure 2. The rod 11, movable on the column 14, can be immersed in the rinsing tank 50 and take the position shown in detail in FIG. 12 and indicated, in general, by Reference 55 in FIGS. 1 and 2. The rinsing station P_ also comprises a circuit 56 for supplying from the suction of the pump 52. The circuit 56 begins downstream of the pump 52, comprises a valve 57 and is intended to be connected to the chamber 34 by a connection hose 58 connected to the pipe 35. Such an arrangement allows the sampling rod
11, Lorsque celle-ci est dans un fût 6, de transférer, dans le fût 6, une quantité connue du composé contenu dans le bac 50, par ouverture de "la vanne 57 et mise en action de La pompe 52. Inversement, Lorsque la canne 11 est immergée dans le bac 50, La mise en action de La pompe d'aspiration 21 assure Le transfert d'une quantité également connue du composé du bac 50 dans la canalisation 8.11, When the latter is in a barrel 6, to transfer, into the barrel 6, a known quantity of the compound contained in the tank 50, by opening " the valve 57 and actuation of the pump 52. Conversely, when the rod 11 is immersed in the tank 50, The actuation of the suction pump 21 ensures the transfer of a quantity also known of the compound of the tank 50 in the pipe 8.
L'enceinte de mélange comporte des moyens de pesée 60 de son contenu, un système d'agitation, du type à pales, par exemple, et des moyens de contrôle de la température 62 du mélange reliés, fonctionnellement, à des moyens de montée en température 63 de l'enceinte. Une pompe d'évacuation 64 et une canalisation d'évacuation 65 complètent le poste de méLange.The mixing enclosure comprises means for weighing 60 of its content, a stirring system, of the paddle type, for example, and means for controlling the temperature 62 of the mixture connected, functionally, to means for raising enclosure temperature 63. An evacuation pump 64 and an evacuation pipe 65 complete the mixing station.
L'installation décrite peut, enfin, être avantageusement reliée à un automate programmable ou, encore, à un micro-ordinateur permettant d'automatiser, de manière classique. Les opérations d'identification des fûts par un système code barres, par exemple, et de mémoriser puis gérer les informations de poids obtenues Lors du pesage de chaque fût sur la balance 24. L'automate programmable ou le micro-ordinateur peut, également, être utilisé pour réguler et commander La descente progressive de la canne 11 à l'intérieur d'un fût 6, en fonction de L'évolution ou de La vitesse de vidage dudit fût ou, encore, de La vitesse d'aspiration de L'additif. IL s'agit alors, dans ce cas, d'asservir le moyen mécanique ou électrique assurant la descente du chariot 13 à une valeur proportionnelle à l'évolution instantanée et continue de vidage du fût 6, donnée par l'évolution du poids du fût 6.The installation described can, finally, be advantageously connected to a programmable controller or, even, to a microcomputer making it possible to automate, in a conventional manner. The operations of identifying the barrels by a barcode system, for example, and of memorizing and then managing the weight information obtained When weighing each barrel on the balance 24. The programmable controller or the microcomputer can, also, be used to regulate and control the progressive descent of the rod 11 inside a barrel 6, depending on the evolution or the emptying speed of said barrel or, again, the suction speed of The additive. It is then, in this case, to control the mechanical or electrical means ensuring the descent of the carriage 13 to a value proportional to the instantaneous and continuous evolution of emptying of the barrel 6, given by the evolution of the weight of the barrel 6.
L'installation, montrée à la fig. 1, fonctionne de la manière suivante.The installation, shown in fig. 1, works as follows.
L'huile de base est prélevée dans la citerne 1 par La pompe 4 et La canaLisation 3. Lorsque La quantité nécessaire d'huile de base a été prélevée et pesée par Les moyens de pesée 60, la vanne 5 est fermée et le dosage de L'additif peut débuter. Les fûts 6, circulant sur Le dispositif de convoyage 23, sont d'abord identifiés, afin de déterminer et reconnaître, à la fois, Le type d'additif à doser et le poids standard du fût 6 concerné. La position des bondes est recherchée de façon manuelle ou automatique et les bondes sont dévissées. La canne de prélèvement 11 est alors mise en action pendant que débute L'opération de pesage, par Le moyen de pesée 24. La canne de prélèvement 11 est positionnée au-dessus du fût 6 et commence sa descente pendant que du gaz et, par exemple, de l'air sous pression est envoyé, par l'intermédiaire de la canalisation 46, dans la chambre 33, puis à L'intérieur du tube plongeur 27, afin de déterminer Le niveau deThe base oil is taken from the tank 1 by the pump 4 and the pipe 3. When the necessary quantity of base oil has been taken and weighed by the weighing means 60, the valve 5 is closed and the dosage of The additive can start. The drums 6, circulating on the conveying device 23, are first identified, in order to determine and recognize, both, the type of additive to be dosed and the standard weight of the drum 6 concerned. The position of the bungs is searched for manually or automatically and the bungs are unscrewed. The sampling rod 11 is then put into action while the weighing operation begins, by the weighing means 24. The sampling rod 11 is positioned above the barrel 6 and begins its descent while gas and, by example, pressurized air is sent, via the pipe 46, to the chamber 33, then to the interior of the dip tube 27, in order to determine the level of
Liquide dans le fût. Le repère de niveau ainsi mis en évidence est pris en compte par l'automate de contrôle et constitue, pour ce dernier, un repère de référence. Cette opération de repérage de niveau étant effectuée, la canne de prélèvement 11 peut être positionnée et immergée, avantageusement, uniquement dans la partie supérieure du Liquide, afin de minimiser la poussée d'Archimède dans Le Liquide, dans Le but de ne perturber que très faiblement la pesée effectuée par le moyen de pesée 24. L'immersion partielle de la canne 11 dans la partie supérieure du liquide, et par exemple de quelques centimètres, permet, également, de Limiter le dépôt de liquide sur la canne, ce qui réduit d'autant les quantités de liquides différents amenés à être mis en contact dans La suite du procédé. Lorsque La canne doit être immergée successivement dans plusieurs Liquides. Lorsque La canne de prélèvement 11 est positionnée, la pompe d'aspiration 21 est mise en marche et le prélèvement de L'additif peut commencer.Liquid in the barrel. The level mark thus highlighted is taken into account by the control automaton and constitutes, for the latter, a reference mark. This leveling operation being carried out, the sampling rod 11 can be positioned and immersed, advantageously, only in the upper part of the liquid, in order to minimize the buoyancy of Archimedes in the liquid, with the aim of disturbing only very weakly the weighing carried out by the weighing means 24. The partial immersion of the rod 11 in the upper part of the liquid, and for example of a few centimeters, also allows to limit the deposit of liquid on the rod, which correspondingly reduces the quantities of different liquids brought into contact in the rest of the process. When The cane must be successively immersed in several Liquids. When the sampling rod 11 is positioned, the suction pump 21 is started and the sampling of the additive can begin.
Pendant l'opération de prélèvement, le moyen de pesée 24 fonctionne en continu et transmet, également en continu, les informations relatives à l'évolution du poids du fût qui correspond, très exactement, à la quantité d'additif instantanément prélevée et transférée par la canaLisation 8 dans L'enceinte de mélange 2. L'immersion partielle de la canne 11 est, également, maintenue constante par l'automate qui commande et adapte la vitesse de descente de la canne 11 en fonction de La quantité instantanée d'additif prélevée. Lorsque La quantité d'additif prélevée correspond à la quantité nécessaire au mélange, l'automate de contrôle arrête la pompe 21 et le prélèvement par la canne de prélèvement 11.During the sampling operation, the weighing means 24 operates continuously and transmits, also continuously, the information relating to the evolution of the weight of the barrel which corresponds, very exactly, to the quantity of additive instantaneously withdrawn and transferred by the pipe 8 in the mixing enclosure 2. The partial immersion of the cane 11 is also kept constant by the automatic device which controls and adapts the descent speed of the cane 11 as a function of the instantaneous quantity of additive taken. When the quantity of additive withdrawn corresponds to the quantity necessary for mixing, the control automaton stops the pump 21 and the withdrawal by the sampling rod 11.
L'automate commande Le transfert de la canne 11 αans le bac 50 pour rincer à l'huile de base, par La pompe 21, La canne 11 et La canaLisation 8. La quantité d'huile de base, prélevée dans Le bac de rinçage 50 pour cette phase de rinçage, est prise en compte par le dispositif de pesage 51 et peut donc être incluse dans le calcul du ratio huile de base-additif. S'il s'avère, au cours de L'opération de prélèvement de l'additif, que le moyen de pesée 24 ou que la tige 41 a mis en évidence La présence du fond du fût 6, Le clapet 28 est fermé et la pompe 21 est arrêtée.The automaton controls the transfer of the cane 11 to the tank 50 to rinse with base oil, by pump 21, the cane 11 and the pipe 8. The quantity of base oil taken from the rinsing tank 50 for this rinsing phase, is taken into account by the weighing device 51 and can therefore be included in the calculation of the base oil-additive ratio. If it turns out during the additive removal operation that the weighing means 24 or that the rod 41 has revealed the presence of the bottom of the barrel 6, the valve 28 is closed and the pump 21 is stopped.
La canne 11 est ensuite placée en position haute dans Le fût 6 et La pompe 52 est mise en route. L'ouverture de la vanne 57 provoque l'injection d'huile de base dans La canalisation 56 reliée à La canaLisation 35 et, enfin, l'injection d'huile de base par l'ouverture de pulvérisation 28b pour effectuer le rinçage du fût 6. La canne 11 est alors descendue progressivement jusqu'au fond du fût 6. Lorsque le détecteur 41 indique la présence du fond du fût. la pompe 52 est arrêtée et la pompe 21 est mise en route. Le clapet 28 est ouvert pour permettre le pompage de L'huile de base de rinçage mélangée avec Le reliquat d'additif qui était présent dans le fût 6. Lorsque le moyen de pesage 24 indique que le fût est vide, le clapet 28 est fermé, la pompe 21 est arrêtée et La canne 11 remontée. On obtient ainsi un vidage optimal et aussi complet que possible du fût 6, sans influencer négativement La précision du mélange final, puisque Le rinçage est effectué à L'aide d'une quantité d'huile de base connue et déterminée en fonction d'une quantité également connue du reliquat d'additifs dans le fût 6.The rod 11 is then placed in the high position in the barrel 6 and the pump 52 is started. The opening of the valve 57 causes the injection of base oil into the line 56 connected to the line 35 and, finally, the injection of base oil through the spray opening 28b to rinse the barrel. 6. The rod 11 is then gradually lowered to the bottom of the barrel 6. When the detector 41 indicates the presence of the bottom of the barrel. the pump 52 is stopped and the pump 21 is started. The valve 28 is open to allow pumping of the rinsing base oil mixed with the residue of additive which was present in the barrel 6. When the weighing means 24 indicates that the barrel is empty, the valve 28 is closed , the pump 21 is stopped and the rod 11 raised. An optimal and as complete as possible emptying of the barrel 6 is thus obtained, without negatively influencing the precision of the final mixture, since the rinsing is carried out using a known quantity of base oil determined according to a also known amount of additive residue in the barrel 6.
Pendant l'opération de soutirage. L'immersion de .La canne 11 dans L'additif est contrôlée et constante, puisque sa vitesse de descente est proportionnelle et fonction de l'évolution dans Le temps du prélèvement de L'additif.During the racking operation. The immersion of .The rod 11 in the additive is controlled and constant, since its descent speed is proportional and a function of the evolution over time of the withdrawal of the additive.
La fig. 2 représente une variante de réalisation qui ne diffère de l'installation décrite à la fig. 1 que par l'incorporation d'un réservoii—tampon 70, également muni de moyens de pesée 71, et susceptible d'être relié, par des lignes de transfert 72, à au moins un autre additif (A,., A?, ...). Le réservoir-tampon 70 peut également être, avantageusement, relié par une canaLisation 74 à une autre source d'huile de rinçage _R ou bien être relié par une canaLisation 74a au bac de rinçage 50. Le réservoir-tampon 70 est relié, par une Ligne de transfert 75, à L'enceinte de mélange 2, et, par la canalisation 8, à une canne de prélèvement 11. Une dérivation 76 permet Le transfert direct de l'additif prélevé par la canne 11 vers L'enceinte de mélange 2, sans passer par Le réservoir-tampon 70.Fig. 2 shows an alternative embodiment which does not differ from the installation described in FIG. 1 only by the incorporation of a buffer tank 70, also provided with weighing means 71, and capable of being connected, by transfer lines 72, to at least one other additive (A,., A ?, ...). The buffer tank 70 can also advantageously be connected by a pipe 74 to another source of rinsing oil _R or else be connected by a pipe 74a to the rinsing tank 50. The buffer tank 70 is connected by a Transfer line 75, to the mixing enclosure 2, and, via line 8, to a sampling rod 11. A bypass 76 allows the direct transfer of the additive withdrawn by the rod 11 to the mixing enclosure 2 , without going through the buffer tank 70.
L'installation, représentée à la fig. 2, fonctionne d'une manière équivalente à la variante principale, tout en permettant d'assurer Le dosage simultané ou non de plusieurs additifs, en utilisant La capacité du réservoir-tampon 70 pour gérer au mieux L'opération de dosage en diminuant autant que possible les temps morts. En effet, Le dosage d'un premier additif étant effectué selon le procédé décrit précédemment, un second additif, prélevé par La canaLisation 72, peut être pesé, simultanément ou non, dans le réservoir-tampon 70. Le dosage d'un autre additif peut être effectué selon le même procédé que décrit précédemment, c'est-à-dire à L'aide d'une canne de soutirage prélevant l'additif pesé en continu dans un fût 6 et le dirigeant directement vers Le mélangeur 2. On évite ainsi des mises en contact prématurées de certains additifs et on diminue le temps global de réalisation du mélange Lorsque Le réservoir-tampon 70 est en cours de pesage ou de rinçage. Il est également possible de tranférer l'additif prélevé dans Le fût 6, soit directement vers Le mélangeur 2, soit vers le réservoir-tampon 70, par la canalisation 8 et sa dérivation 76.The installation, shown in fig. 2, operates in a manner equivalent to the main variant, while making it possible to ensure the simultaneous dosing or not of several additives, by using the capacity of the buffer tank 70 to better manage the dosing operation by reducing as much as possible downtime. In fact, the dosage of a first additive being carried out according to the method described above, a second additive, withdrawn by the pipe 72, can be weighed, simultaneously or not, in the buffer tank 70. The dosage of another additive can be carried out according to the same method as described above, that is to say with the aid of a withdrawal cane withdrawing the additive weighed continuously in a barrel 6 and directing it directly to the mixer 2. This thus avoids premature contacting of certain additives and decreases the overall time for producing the mixture When the buffer tank 70 is being weighed or rinsed. It is also possible to transfer the additive taken from the barrel 6, either directly to the mixer 2, or to the buffer tank 70, via the pipe 8 and its bypass 76.
Le procédé et l'installation décrits permettent donc de réduire fortement les pertes d'additifs, dans la mesure où le vidage des fûts peut être achevé totalement, ce qui réduit d'autant Les pertes coûteuses de ces produits. Le contrôle du vidage évite, bien évidemment, de se trouver en possession de fûts non complètement vidés, ce qui réduit d'autant la pollution de l'environnement. Les fûts sont, par ailleurs, rincés sur place, sans manipulation supplémentaire.The process and the installation described therefore make it possible to greatly reduce the losses of additives, insofar as the emptying of the drums can be completely completed, which consequently reduces the costly losses of these products. The emptying control obviously avoids being in the possession of drums that are not completely emptied, which therefore reduces environmental pollution. The barrels are, moreover, rinsed on site, without additional handling.
Il doit, en outre, être noté que, dans Le cas d'installations importantes contenant des réservoirs-tampons, le pesage direct d'un fût d'additif dans une station spécifique, permet de réserver le réservoir-tampon au pesage d'autres additifs, voire au pesage de L'huile de base, ce qui permet un gain de temps non négligeable et réduit la durée totale du cycle de formulation.It should also be noted that, in the case of large installations containing buffer tanks, the direct weighing of an additive drum at a specific station allows the buffer tank to be reserved for weighing other additives, or even weighing the base oil, which saves a considerable amount of time and reduces the total duration of the formulation cycle.
IL doit, enfin, être souligné que l'immersion progressive et contrôlée de la canne de soutirage dans les fûts d'additifs, en fonction de l'évolution du niveau de l'additif, évite Les perturbations de pesée provoquées par La poussée d'Archimède, ce qui constitue un facteur non négligeable de précision de formulation.It must, finally, be emphasized that the gradual and controlled immersion of the withdrawal rod in the additive barrels, depending on the evolution of the level of the additive, avoids the weighing disturbances caused by the thrust of Archimedes, which is a significant factor in formulation accuracy.
L'invention n'est pas limitée aux exemples décrits et représentés, car diverses modifications peuvent y être apportées sans sortir de son cadre.The invention is not limited to the examples described and shown, since various modifications can be made to it without going beyond its framework.
POSSIBILITE D'APPLICATION INDUSTRIELLE :POSSIBILITY OF INDUSTRIAL APPLICATION:
L'invention trouve une application avantageuse dans la formulation de lubrifiants contenant des additifs en proportion relative faible par rapport à la quantité totale obtenue. The invention finds an advantageous application in the formulation of lubricants containing additives in a relatively small proportion compared to the total amount obtained.

Claims

REVENDICATIONS :CLAIMS:
1 - Procédé de formulation d'un mélange à partir de composants, de préférence liquides, incluant un composé de base et au moins un additif conservés dans des moyens de stockage (1, 6, 50) distincts, à partir desquels ils sont prélevés pour être dosés et transférés, par l'intermédiaire de Lignes de transfert (3, 8, 72,. 74), dans une enceinte commune de mélange (2), caractérisé en ce qu'il consiste :1 - Method for formulating a mixture from components, preferably liquids, including a base compound and at least one additive kept in separate storage means (1, 6, 50), from which they are taken for be dosed and transferred, via Transfer lines (3, 8, 72 ,. 74), in a common mixing enclosure (2), characterized in that it consists:
- à assurer le prélèvement d'au moins un additif à partir de son moyen de stockage (6),- ensuring the removal of at least one additive from its storage means (6),
- à peser en continu, lors du prélèvement, le moyen de stockage (6),- to weigh continuously, during the removal, the storage means (6),
- à déterminer, par contrôle de La variation de poids du moyen de stockage pendant le prélèvement, La quantité d'additif prélevée,- to determine, by checking the variation in weight of the storage means during withdrawal, the quantity of additive withdrawn,
- à arrêter Le prélèvement lorsque la' quantité nécessaire d'additif a été prélevée et à La transférer vers l'enceinte de mélange (2).- stop sampling when the necessary quantity of additive has been withdrawn and transfer it to the mixing chamber (2).
2 - Procédé selon la revendication 1, caractérisé en ce qu'il consiste à assurer Le prélèvement de L'additif à l'aide d'une canne de prélèvement (11) dont la vitesse de descente dans' le moyen de stockage (6) est fonction de L'évolution dans Le temps du prélèvement de l'additif.2 - Method according to claim 1, characterized in that it consists in ensuring the removal of the additive using a sampling rod (11) whose speed of descent in ' the storage means (6) is a function of the evolution over time of the withdrawal of the additive.
3 - Procédé selon La revendication 1, caractérisé en ce qu'il consiste à immerger partiellement La canne de prélèvement3 - Method according to claim 1, characterized in that it consists in partially submerging the sampling rod
(11), uniquement dans la partie supérieure de l'additif et à déterminer lorsque La canne arrive au fond du moyen de stockage (6).(11), only in the upper part of the additive and to be determined when the rod reaches the bottom of the storage means (6).
4 - Procédé selon la revendication 3, caractérisé en ce qu'il consiste ensuite à récupérer, par rinçage du moyen de stockage (6), Le reliquat d'additif à l'aide d'un composé du mélange dont la quantité est déterminée en correspondance avec La quantité du reliquat d'additif.4 - Method according to claim 3, characterized in that it then consists in recovering, by rinsing the storage means (6), the remainder of the additive using a compound of the mixture, the amount of which is determined in correspondence with the quantity of the additive residue.
5 - Procédé selon La revendication 4, caractérisé en ce qu'il consiste : - à assurer le rinçage par Le composé de base,5 - Method according to claim 4, characterized in that it consists: - to ensure rinsing with the base compound,
- à recycler, vers l'enceinte de mélange (2), le mélange obtenu par ledit rinçage.- Recycling, to the mixing enclosure (2), the mixture obtained by said rinsing.
6 - Procédé selon Les revendications 2 et 5, caractérisé en ce qu'il consiste à prélever Le composé de base utilisé pour le rinçage dans un bac de rinçage (50) à L'aide de la canne de prélèvement assurant Le soutirage de L'additif.6 - Method according to claims 2 and 5, characterized in that it consists in withdrawing the base compound used for rinsing in a rinsing tank (50) using the sampling rod ensuring the withdrawal of the additive.
7 - Procédé selon L'une des revendications 1 à 6, caractérisé en ce qu'il consiste à traiter et doser plusieurs additifs simultanément.7 - Method according to one of claims 1 to 6, characterized in that it consists in treating and dosing several additives simultaneously.
8 - Procédé selon la revendication 7, caractérisé en ce qu'il consiste :8 - Method according to claim 7, characterized in that it consists:
- à traiter et doser, simultanément avec le premier additif, d'autres additifs, - à prélever ces additifs à partir de leurs moyens de stockage,- to treat and dose, simultaneously with the first additive, other additives, - to take these additives from their storage means,
- à les transférer dans un réservoir-tampon (70),- transferring them to a buffer tank (70),
- à Les transférer dans L'unité de mélange par l'intermédiaire d'une Ligne de transfert (76). 9 - Procédé selon l'une des revendications 1 ou 7, caractérisé en ce qu'il consiste à prélever les additifs ou le composé de base utilisé pour Le rinçage à l'aide d'une canne de prélèvement (11) déplaçable entre le moyen de stockage (6) et Le bac de rinçage (50). 10 - Installation de mise en oeuvre du procédé selon l'une des revendications 1 à 9, destinée à la formulation d'un mélange à partir de composants, de préférence liquides, incluant un composé de base et au moins un additif, ladite installation comportant : - des moyens de stockage (6) des composants, - des postes de prélèvement (P-, P->) pour chaque composant, munis de moyens de prélèvement (4, 11, 21) des composants, lesdits moyens de prélèvement étant en reLation avec des Lignes de transfert (3, 8, 76) aboutissant à une enceinte commune de mélange (2) et incluant une canne de prélèvement (11) déplaçable destinée à soutirer les composants et comprenant un corps tubulaire de prélèvement (25) et des moyens de contrôle et de commande de sa position par rapport au niveau du composant contenu dans les moyens de stockage (6), - un bac de rinçage (50) relié à l'enceinte de mélange (2) et susceptible d'être connecté à La canne de prélèvement (11), par l'intermédiaire d'un chariot mobile (13), caractérisée en ce que le poste de prélèvement (P.,) de L'additif comporte un moyen de pesée (24) en continu du moyen de stockage (6) de L'additif, ledit moyen de pesée étant relié fonctionnellement à un automate de contrôle chargé de contrôler La nature de L'additif et de déterminer La quantité d'additif prélevée et de commander le prélèvement.- To transfer them to the mixing unit via a transfer line (76). 9 - Method according to one of claims 1 or 7, characterized in that it consists in removing the additives or the base compound used for rinsing with the aid of a sampling rod (11) movable between the means storage (6) and The rinsing tank (50). 10 - Installation for implementing the method according to one of claims 1 to 9, intended for the formulation of a mixture from components, preferably liquids, including a base compound and at least one additive, said installation comprising : - storage means (6) of the components, - sampling stations (P-, P->) for each component, provided with sampling means (4, 11, 21) of the components, said sampling means being in relationship with transfer lines (3, 8, 76) leading to a common mixing enclosure (2) and including a movable sampling rod (11) intended to withdraw the components and comprising a body sampling tubular (25) and means for monitoring and controlling its position relative to the level of the component contained in the storage means (6), - a rinsing tank (50) connected to the mixing enclosure (2 ) and capable of being connected to the sampling rod (11), by means of a mobile carriage (13), characterized in that the sampling station (P.,) of the additive comprises a means of continuous weighing (24) of the storage means (6) of the additive, said weighing means being functionally connected to a control automaton responsible for checking the nature of the additive and determining the quantity of additive withdrawn and order the sample.
11 - Installation selon la revendication 10, caractérisée en ce que La canne de prélèvement (11) comprend un tube plongeur (27) déplaçable à l'intérieur du corps de prélèvement (25), par L'intermédiaire de moyens de commande (29, 31), Ledit tube comportant un clapet de fermeture (28, 28a) du corps de prélèvement (25) et des moyens (33, 46) de détection pneumatique du niveau du composant dans le moyen de stockage (6). 12 - Installation selon la revendication 11, caractérisée en ce que les moyens (33, 46) de détection 'de niveau sont constitués par l'enveloppe interne (27b) du tube plongeur (27), laquelle traverse le clapet (28, 28a) à une extrémité et débouche, par l'autre extrémité, dans une chambre (33) en relation avec un. circuit pneumatique.11 - Installation according to claim 10, characterized in that the sampling rod (11) comprises a dip tube (27) movable inside the sampling body (25), by means of control means (29, 31), said tube comprising a closure valve (28, 28a) of the sampling body (25) and means (33, 46) for pneumatically detecting the level of the component in the storage means (6). 12 - Device according to Claim 11, characterized in that the means (33, 46) for detecting 'level are constituted by the inner casing (27b) of the plunger tube (27), which passes through the valve (28, 28a) at one end and opens, through the other end, into a chamber (33) connected with a. pneumatic circuit.
13 - Installation selon la revendication 11 ou 12, caractérisée en ce que La canne de prélèvement (11) comprend, en outre, des moyens de détection du fond (41, 42, 43) du moyen de stockage (6) constitués par une tige (41) déplaçable à l'intérieur du tube plongeur (27), dont l'extrémité inférieure (41_a) traverse le clapet (28, 28a) et dont l'extrémité supérieure (42) est reliée aux moyens de contrôle (29, 31) du corps de prélèvement (25).13 - Installation according to claim 11 or 12, characterized in that the sampling rod (11) further comprises means for detecting the bottom (41, 42, 43) of the storage means (6) constituted by a rod (41) movable inside the dip tube (27), the lower end (41_a) of which passes through the valve (28, 28a) and the upper end (42) of which is connected to the control means (29, 31 ) of the sampling body (25).
14 - Installation selon La revendications 12, caractérisée en ce que L'extrémité supérieure (42) est située dans la chambre (33) et est couplée à un capteur, de préférence du type inductif (45), la tige (41) étant mobile à l'intérieur de L'enveloppe interne (27b) réservée à la circulation du fluide de détection du niveau du composant.14 - Installation according to claim 12, characterized in that the upper end (42) is located in the chamber (33) and is coupled to a sensor, preferably of the inductive type (45), the rod (41) being movable inside the internal envelope (27b) reserved for the circulation of the component level detection fluid.
15 - Installation selon l'une des revendications 11 à 14, caractérisée en ce que le clapet de fermeture est constitué d'une buse de pulvérisation (28) reliée, par un passage (27a) traversant de part et d'autre le tube plongeur (27), à une source de composant de rinçage. 15 - Installation according to one of claims 11 to 14, characterized in that the closure valve consists of a spray nozzle (28) connected by a passage (27a) passing on either side of the dip tube (27), to a source of flushing component.
PCT/FR1991/000395 1990-05-16 1991-05-16 Method for formulating mixtures and installation for implementing same WO1991017820A1 (en)

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FR9006338A FR2661741A1 (en) 1990-05-16 1990-05-16 PROCESS FOR THE FORMULATION OF MIXTURES, INSTALLATION AND DEVICE FOR ITS IMPLEMENTATION.
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US3066692A (en) * 1961-09-07 1962-12-04 Ethyl Corp Blending control apparatus
EP0170322A2 (en) * 1984-07-31 1986-02-05 "National Forge Europe" Equipment for mixing powder- and/or granule-like components from a body to be compressed under high pressure
EP0245667A1 (en) * 1986-05-10 1987-11-19 Edeleanu Gesellschaft mbH Weighing device for weighing batches to be mixed

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993023791A1 (en) * 1992-05-21 1993-11-25 Eastman Kodak Company A system for producing a photographic dispersion
EP0794013A1 (en) * 1996-03-05 1997-09-10 Sa Cellier Groupe Installation for preparation and delivery of a coating composition to a paper coating head or the like
FR2745828A1 (en) * 1996-03-05 1997-09-12 Cellier Groupe Sa INSTALLATION FOR PREPARING AND SUPPLYING A SLEEPING COMPOSITION TO A SLEEPING HEAD FOR PAPER OR THE LIKE
US5935332A (en) * 1996-03-05 1999-08-10 Cellier Groupe S.A. Plant for preparing and feeding a coating composition to a coating head for paper or the like

Also Published As

Publication number Publication date
JPH05504913A (en) 1993-07-29
EP0483334A1 (en) 1992-05-06
FR2661741A1 (en) 1991-11-08
CA2064218A1 (en) 1991-11-17
BR9105766A (en) 1992-08-18

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