DE3218637A1 - Mixing appliance - Google Patents

Abstract

Appliance for mixing at least two media, having a barrel-shaped vessel, which can be sealed by means of a cover, from whose inside at least one drivable stirrer of an agitator extends into the vessel, the inner contour (3) of the vessel (2) being designed at least as a section of a hemisphere. <IMAGE>

Description

Haagen & Rinau, Dortmunder Str. 5, 2800 Bremen 1

Mixing device

The invention relates to a device for mixing at least two media, with a cup-shaped one Kettle, which is to be closed by means of a lid, from the inside of which at least one drivable stirrer of a stirrer extends into the boiler.

Such mixing devices, such as those used, for example, in pharmacy, chemistry, cosmetics and the Food industry for mixing, stirring and kneading, possibly with simultaneous heating or Cooling, venting or gassing, sterilizing etc. are used in large numbers for both

512
Bremen / Bremen Office:

P.O. Box / P. O. Box 10 71 27 Hollcrallce 32, D-2800 Bremen 1 Telephone: (0421) '349071 Telecopicrer / Tclecopier: CCITT Tclegr. / Cables: diagram Bremen Telex: 244 958 bopatd

Accounts Bremen:

Bremer Bank. Bremen

(Sort code 290 800 10) 100 144 900

Deutsche Bank. Bremen

(Sort code 290 700 50) 111 2002

Bank for Community Economy, Bremen

(BLZ 25010111) 1019815000

PScIiA Hamburg

(Sort code 200 100 20) 1260 83-202

Office Münchcn / MunichOfRce (only Patcmanwaitc):

P.O. Box / P.O. Box 22 0137 Schlotthauc-rstraßc 3. D-8000 Munich 22 Telephone: (089) 22 3311 Telckop./Telecop .: (089) 22 15 69 CCITT 2 Telegr./Cablcs: Forbopat Munich Telex: 524 282forbod

BOEHMERT '&' l

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Negative pressure as well as positive pressure operation in various Designs and sizes known. This does not only apply with regard to the adaptation to the respective Work task selected, different agitators, for which in particular anchor, planetary and paddle agitator systems are known, but also with regard to various other features of such mixers such as the design of the agitator drive, the material to be stirred, the arrangement and Formation of homogenizers, the locking means between the boiler and cover etc ..

What is common to all known mixing devices is the shape of the so-called mixing container. Kettle, the shell of which is cylindrical at least over a vertical section, and which generally has a dished bottom, with the stirrer or stirrers provided and possibly provided Wipers are arranged so that they are with the lid closed in the boiler up to it Extend inside, with the agitator drive generally on the outside of the lid is arranged.

Such a configuration necessarily has the consequence that the cover - including the one on it fortified bodies-zuir. open the mixing device must be moved translationally upwards in the vertical direction when the interior of the Boiler, for example, is to be inspected or cleaned. With regard to that in particular at larger mixing devices present considerable weight of the lid including that arranged on it Facilities and the existing tours

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32Ί8637

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this requires a suitable drive, which is usually and therefore usually as Hydraulic drive is formed and is correspondingly expensive.

It is also felt to be disadvantageous in the known mixing devices that a predetermined certain boiler volume requires a relatively large height, and that this height in numerous use cases not even completely can be exploited, since in mixing devices with a so-called. Umpumpleitung, in which the material to be mixed from the the lower section of the boiler is pumped out by means of a pumping device and via the circulation line in the upper section of the boiler (below the lid) is returned, the filling level at least must be about 2 to 3 cm below the inlet of the circulation line in the boiler.

Finally, in the case of the known mixing devices, in particular in the case of relatively large structural units cleaning is not particularly easy and with mixing devices whose mix during the Stirring process must be heated or cooled, the heat transfer is not optimal.

The present invention is based on the object of the known mixing devices of the type described at the outset To improve the species while avoiding its disadvantages, and such a device too create that significantly simplifies the opening and closing device for the lid and is accordingly cheaper, the existing filling volume of the boiler should be better utilizable

BOEHME * ij '&. DCjEÖMKRT. _t / ·. _:) .

than with the previously known mixing devices: j

or with the same specified filling volume a j

Smaller overall height should be achievable, with the boiler still easier to clean and finally if necessary, the heating or cooling of the material to be mixed is to be improved.

According to the invention, this object is achieved

characterized in that the inner contour of the |

Kessel at least as a section of a hemisphere \ i

is trained. Such a configuration opens u

compared to the previously known mixing _devices:

various advantages, as described below ' is, wherein a preferred embodiment is that the inside of the boiler as a hemisphere

is designed, compared to the previously known state j

the technology but also expedient ':]

can be seen in training courses in which the interior 'i

side of the boiler as a spherical cap or as a spherical zone £ «

is designed as below in detail ij

is explained. ff

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The design according to the invention makes it possible to %

next once, on the elaborate arrangement of a t;

hydraulic hoist for translatory displacement η

slide the lid along with the \

To dispense facilities, namely the cover according to a preferred embodiment of the present Invention from its closed position about a horizontal pivot axis into its open position Can be swiveled up, the swivel axis preferably ί

in the horizontal meridian plane is the inner contour of the bowl forming the sphere. Even if the one running through the outer contour of the stirrer

BOEHMERT a.BOElJMt = UT::. ·

Envelope curve corresponds to the inner contour of the boiler, the actual stirring means therefore in the closed State of the lid on the inside of the kettle j or almost in contact, as this for the

I mode of operation is particularly useful and therefore

I is preferably provided, it can be

1 proper design when up or down

I swivel the lid out of or into its closing

5 position does not cause a collision between the stirrer

I, __ and the kettle come. In order to ensure this

I deliver is in a preferred embodiment

I of the present invention is the storage of the lid

I designed so that the lid before swiveling up

I is to be raised a little from its closed position (and

Accordingly, in the reverse process of ^closing:; after swiveling down a little before reaching the final closed position). I In order to make this possible, a wide variety of

i: designs conceivable. A preferred embodiment

I consists in the fact that the lid with vertical play

λ is mounted on a pivot axis, which in turn

I is stationary, with one by hand or also

: a motor-operated drive can be provided,

; i; with which the lid can be opened or closed,

$ and where the lid has a nose reaching under it

■ 'or the like. may have, by means of which it when actuated of the drive in the closed position initially - taking advantage of the aforementioned bearing play - something to be raised and then pivoted.

To hold the cover securely in every intermediate position without having to actuate the drive accordingly must, the latter is preferably self-locking; forms and contains, for example, a worm gear.

9 9 1 P K O

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According to a further preferred Aucges toi tuna rl car present invention , a radially outwardly extending flange is provided on the edge of the Kcscclc , the normal radial width of which widens steadily at or towards a section and a passage opening for a split circulation line at the outer widened section whose lower line section leads from the flange to a pumping device arranged on the lower section of the boiler and whose upper LpltnnuPribprhni tt j η d ⁿ n lid opens, with such a configuration expediently also a radially outwardly extending flange at the edge of the lid is arranged, the shape of which corresponds to the boiler flange, and wherein at least one of the flanges is provided with a seal for sealing the circulation line . Since in such a configuration the inlet of the circulation line does not lead into the kettle, but rather its cover, the kettle can therefore be practically completely filled and thus completely used in accordance with its filling volume. This leads to a considerable reduction in the required overall height, especially since the overall height required for realizing a certain envelope volume is in any case smaller with a (semi-) spherical shape of the boiler than with a cylindrical boiler.

The preferably provided heating ball shape of the boiler also creates a particularly good cleaning option.

Preferred embodiments of the invention are described in the subclaims.

BOEHMERT. S.B-d.F4Mi5RT::. * , '.. "

The invention is illustrated below by way of an exemplary embodiment further explained with reference to a drawing. It shows:

Fig. 1 is a partially sectioned side view of an inventive Mixing device with the lid closed;

FIG. 2 shows the mixing device according to FIG. 1 with the cover pivoted up; FIG. and

3a shows the schematic representations of different boiler shapes under 3c.

Figs. 1 and 2 show a mixing device for mixing media, not shown, a means by a lid 1 has closable boiler 2, the inside 3 of which is designed as a hemisphere (The dot-dash line 4 drawn in the upper part of Fig. 1 completes the spherical or Circular shape).

From the cover 1, a stirrer of an agitator, designated as a whole by 6, extends downward into the kettle 2 in such a way that the paddles or impellers 8 attached to a paddle arm 7 with their outer edge on the inside 3 of the kettle 2 are present. In addition, further agitator blades 9 and 9 ^{1 are} attached to the agitator arms 7, which extend from the agitator arm 7 into the kettle and partly interact with a agitator blade 11, as can be seen from FIG.

The agitator also has a drive 12, which is arranged on the outside of the cover 1.

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The boiler 2 has a hollow jacket 13, which is of the semicircular inner wall 14 and one also arranged at the semicircular, constant distance a to the inner wall 14 Outer wall 16 is formed.

At the lowest end of the boiler 2, a homogenizer 17, which also acts as a pumping device, is arranged. the material to be mixed is drawn off from the boiler 2 and via sections 18 and 18 to a transfer line Inlet 19 provided in cover 1 leads. The Umpump- |

line 18, 18 'is in the parting line 21 between the .',

Lid 1 and the boiler 2 qeteilen, as in particular _t

can be seen from FIG. The mutually facing ends of the line sections 18 and 18 'open in each case | _v ;

into one on the edge of the boiler 2 or the lid 1 ₍

arranged flange 22 or 23, where the flanges %

22, 23 by the dimension b over the outside of the outside H

π wall 16 of the boiler protrude and to that ^

Section towards which the transfer line 18, 18 ″ is arranged is to expand steadily to the dimension c. This constant expansion allows the cover 1 and to close the boiler 2 in the closed state with a tightening strap 24, which is spaced apart having arranged clamping block 26.

In the flange 23 of the cover 1 there is an O-ring which is assigned to the circulating line section 18 'and is designed as an O-ring Seal 27 is provided which prevents the mixed medium from escaping.

The cover 1 is in its closed position, shown in FIG. 1, about a horizontal pivot axis 28 can be swiveled up, as can be seen in FIG.

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f-S The pivot axis 28 is approximately .t of the partial

; i add 21 coincident meridional planes of the

(8 inner contour 3 of the boiler 2 forming the ball 4,

I also the outer contour of the impeller 8 des

I stirrer 6 is. The storage of the cover 1 is so

II formed that the lid 1 before pivoting up

I its closed position in its open position

r * according to the arrow 29 in FIG. 2 initially according to the

% Arrow 30 in Fig. 1 is to be raised slightly. For this owns

ä "* the cover 1, the pivot axis 28 encompassing elongated holes

}, i 25, which run vertically in the closed position (see Fig. 1).

; ϊ The pivot axis 28 has bearings, not shown

9 firmly mounted on the boiler or on the supporting structure. With the swivel

% shaft 28 are firmly connected via parallel keys 30 lugs 32,

;; which under a flange-like extension 33 of the lid

* 1 grab, as can be seen from FIGS. 1 and 2.

% The drive designated as a whole with 34 for opening

I and closing the lid 1 is by means of a trade wheel 36 to be operated by hand and has a worm gear, not shown in detail, ?! so that the drive 34 is self-locking and the cover 1 is therefore in every intermediate position I remains without the drive 34 being actuated any further.

i | The way in which the mixing device works

':> is as follows:

During the with the lid closed (Fiy. 1) carried out Operation in which the boiler 2 can be filled with material to be mixed almost up to its edge 21, the stirrer driven by the stirrer drive 12 revolves around the vertical axis of rotation 37, whereby it does the Mixture, not shown, mixed with stirring.

BOEHMERT. S-BCfE ^ NiERT::. *

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During operation, the homogenizer 17 can run and draw off mixed material from the lower part of the boiler 2 via the circulation line 18, 18 * and feed it back to the boiler via the inlet 19 located in the cover 1, and so on work in vacuum mode. When the batch in question is ready, the boiler contents can be drawn off via the section 18 of the circulation line and a distributor 38 which, when actuated accordingly ^{, also closes the circulation line section 18 1} , via a line (not shown).

If the mixing device is then to be opened for inspection and / or cleaning of the boiler, so the handwheel 36 of the drive 34 is turned to the cover 1 in the open position (Fig. 2) bring. The driving force applied by hand via the handwheel 36 is transmitted via a Worm gear on the lugs 32, which with the pivot shaft 28 via parallel keys 30 or the like. are connected so that the lugs 32 reach under the lugs 33 of the lid 1 and this Lift slightly in the direction of arrow 30. This is made possible by the fact that the cover 1 is mounted on the pivot shaft 28 with elongated holes 25. Before that, it goes without saying the locking created by means of the tensioning strap 24 and the tensioning clamp 26 between the cover 1 and the boiler 2 solved. Upon further actuation of the drive 34, the cover pivots with the on it arranged devices, so for example the agitator drive 12, the agitator 6 and the upper section 18 * of the circulation line according to

BOEHMERT &

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Arrow 29 upwards, as can be seen in FIG. 2. This makes the inside 3 of the boiler 2 accessible and can be cleaned, for example.

To both the drive force to be applied to the handwheel 36 and the stress on the lugs 32 when opening and closing the lid 1 is sufficiently small to keep is in view of the not insignificant weight of the lid 1 together with the one arranged on it Facilities such as the agitator drive 12, the stirrer 6, etc. provided a counterbalance that is in the illustrated embodiment consists in counterweights that are based on the in the drawing to the right of the Pivot axis 28 are arranged lying side, wherein the counterweights 39 do not take up any additional space, since the space they occupy in Fig. 1 on the right side because of the projection of the Agitator drive 12 must be kept free when opening the lid 1 anyway. With a corresponding Dimensioning of these counterweights 39 can therefore possibly be done with a very low driving force receives a low load on the noses 32.

Closing takes place in the reverse order, also by actuating the handwheel 36 in the opposite direction of rotation, so that the cover 1 first swivels downwards against the arrow 29 until it has almost reached the closed position, and where it ultimately moves against the arrow 30 (Fig. 1) ^{lowers in the} vertical direction on the boiler 2, so that then again a locking means

BOEHMERT & BOEHMERT. :

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of the tensioning strap 24 and the tensioning clamp 26 are carried out and operation is started with a new batch can be.

3a to 3c show a basic, schematic representation of a part of the invention Mixing device with different design of the boiler, wherein in Fig. 3a the boiler as in the Design according to FIGS. 1, 2 is designed as a hemisphere, while it is in the design is designed as a spherical zone according to FIG. 3b and as a spherical cap in the embodiment according to FIG. 3c. It is It can be readily seen that even in an embodiment according to FIGS. 3b or 3c, the inventive Desired advantages can be achieved without further ado, but with a given volume of the Boiler 2 already with regard to the overall height, but also from other points of view in general the hemispherical shape according to FIGS. 1, 2 and 3 a is preferred.

BOEHMERT & BOEH ^ RT: Γ '°:

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hi-I'j: II 14-iQ May 18, 1982

REFERENCE CHARACTERISTICS
(LIoT OF REFEREKCE KuTiSx.ALo)

1 lid 1 2 boilers 2 ^ Inside (of 2) ³ y 4 line 5 - 5 6 stirrers 6th 7 agitator arm 7th 8 agitator blades 8th 9.9 'impeller 9 10 - 10 11 stirring sword 11 12 agitator drive 12th 13 hollow jacket 13th 14 inner wall (of 2) 14th 15 - 15th 16 outer wall (of 2) 16 17 homogenizer 17th 18.18 'circulation line 18th 19 inlet 19th 20 - 20th 21 butt joint 21st 22 flange (of 2) 22nd 23 flange (of 1) 23 24 strap 24 P5 elongated holes 25th ? £ Spannklobpn 26th 27 Seal 27 28 swivel axis (for 1) 28 29 arrow 29 T ₁ Q key 30th

218637

BOEHMERT & BOKH Μϊ & ΐ: i

31 - distance ⁷ ' 32 nose Measure 5? 33 approach (of 1) Measure 55 34 drive (for 1) 34 55 - 55 36 handwheel 36 37 axis 57 33 distributors . 56 39 counterweights 59 40 - 40 4'i a - 41 42 ^b ~ 42 43 ^c " 43 44 44 4-5 45 46 46 47 47 48 48 49 49 50 50 51 51 52 52 53 55 54 54 55 55 56 56 57 57 58 58 59 59 60 60 61 61 62 62 63 63 64 64 65 65

Claims (16)

Expectations 1 J device for mixing at least two media, "with a pot-shaped kettle, which is to be closed by means of a lid, from the inside at least one drivable stirrer of an agitator extends into the boiler, characterized in that, that the inner contour (3) of the boiler (2) is formed at least as a section of a hemisphere. 2. Device according to claim 1, characterized in that that the inside (3) of the boiler (2) is designed as a hemisphere (Fig. 1, 2, 3a). 3. Device according to claim 1, characterized in that that the inside (3) of the boiler (2) is designed as a spherical cap (Fig. 3c). 4. Apparatus according to claim 1, characterized in that the inside (3) of the boiler (2) is designed as a spherical zone (Fig. 3b). 5. Device according to one of claims 2 to 4, BOEHMERT & BOEF-I. '^ F · ίϊ1 "\ / J - 2 - characterized in that the cover (1) nuo cciner Closed position (Fig. 1) about a horizontal pivot axis (28) hcchzuschwenken in an open position (Fig. 2) is. 6. Apparatus according to claim 5, characterized in that that the pivot axis (28) for the cover (1) in the horizontal meridional plane (21) of the inner contour (3) of the boiler (2) forming the ball (4). 7. Device according to one or more of the preceding Claims, characterized in that the outer contour (4) of the stirrer (6) of the inner contour (3) of the boiler (2). 8. Device according to one or more of claims 5 to 7, characterized in that the storage of the lid (1) is designed so that the lid (1) must be lifted out of its closed position (Fig. 1) before swiveling up. 9. Apparatus according to claim 8, characterized in that a drive (34) is provided with which the Lid (1) is to be opened or closed, the at least one under the lid (33) engaging nose (32) or the like. has, by means of which the cover (1) when the drive (34) is actuated in the closed position (Fig. 1) must first be lifted and then swiveled. 10. Apparatus according to claim 8 or 9, characterized in that the cover (1) with vertical Game is mounted on a horizontal pivot axis (28). BOEHMERT & BOEH YiBRT ': ■ ". ··", 11. The device according to claim 10, characterized in that the cover (1) with elongated holes (25) is mounted on the pivot axis (28), which is in the closed state in the vertical direction extends. 1.2. Device according to one or more of the preceding claims, characterized in that the cover (1) is provided with a counterweight (39) which is a relative to its pivot axis (28) effective counter-torque generated. 13. Device according to one or more of the preceding Claims, characterized in that a self-locking drive (34) is provided with which the cover (1) can be opened or closed. 14. The device according to one or more of the preceding claims, characterized in that a radially outwardly extending flange (22) is provided on the edge of the boiler (2), the radial width (b) of which is steadily widened at one section and at which The widened section has a through opening for a split circulation line (18, 18 '), the lower line section (18) of which leads from the flange (22) to a pumping device (17) arranged on the lower section of the boiler (2), and the upper line section ( 18 ¹ ) opens into the cover (1). BOEHMERT & BOEHMERT \ \ '">, -A- 15. The device according to claim 14, characterized in that that at the edge of the cover (1) a radially outwardly extending flange (23) is arranged the shape of which corresponds to the boiler flange (22); at least one of the flanges (22, 23) with a seal (27) for sealing the circulation line (18, 18 ') is provided. 16. Device according to one or more of the preceding Claims, characterized in that the boiler (2) has a hollow jacket in a manner known per se (13) to be charged with a heating or cooling medium; and that the outer shell (16) of the boiler (2) a substantially constant Distance (a) to the inner shell (14).