EP0239711A1 - Mobile plant cleaning the ballast of a track with means to distribute said ballast - Google Patents

Abstract

A mobile ballast cleaning apparatus comprises a first and a second work vehicle. A track lifting device and a vertically adjustable ballast excavating and conveying chain are mounted on the first work vehicle, and a ballast screening installation for separating waste from cleaned ballast and a waste conveyor means for removing the waste are mounted on the second work vehicle. The apparatus further comprises a cleaned ballast conveying and redistributing installation including a conveyor band mounted on the second vehicle for receiving the cleaned ballast from the ballast screening installation, a first cleaned ballast conveyor arranged to convey the cleaned ballast to an output end adjacent a first ballast redistributing outlet immediately rearwardly of the ballast excavating site, and a second cleaned ballast conveyor having an input end adjacent the output end of the first ballast conveyor and leading to a second ballast redistributing outlet arranged rearwardly of the rear undercarriage of the first work vehicle. A ballast flow deflector is mounted between the output end of the first cleaned ballast conveyor and the input end of the second cleaned ballast conveyor, and a drive selectively positions the ballast flow deflector for directing the cleaned ballast to the first outlet for continuously forming a first layer of cleaned ballast as the mobile apparatus advances in the operating direction and/or to the second outlet for forming a second layer of cleaned ballast over the first layer.

Description

The invention relates to a mobile system for cleaning the ballast bedding of a track, with a conveyor and clearing chain arranged on a first work vehicle between its two running gears in the area of a track lifting device, provided for ballast pick-up and a conveyor chain which can be loaded by the latter via a transport conveyor belt and on a second one Upstream work vehicle arranged screening plant with overburden conveyor belt, as well as with a ballast distribution device with conveyor belts for transporting and reintroducing the cleaned ballast up to a first ballast outlet provided directly behind the ballast excavation point - for a first ballast layer on the cleared track bed and / or via a distribution conveyor belt up to one in the working direction downstream second ballast outlet - for applying a second ballast layer to the first ballast layer.

It is - according to CH-PS 651 87o - a mobile system for cleaning the ballast bed of a track of the type described above, wherein a conveyor and clearing chain provided for ballast pick-up is arranged on a first work vehicle between its two trolleys in the area of a track-laying device. From this, a screening plant, which is located on a second, upstream, working vehicle and is coupled with this, is formed from two screens with overburden conveyor belt via a conveyor belt with ballast to be cleaned. A gravel distribution device with conveyor belts arranged one behind the other is provided for transporting and reintroducing the cleaned ballast obtained from the screening plant. The cleaned ballast is dropped directly behind the ballast excavation point via a distributor device in a first ballast outlet to form a first ballast layer on the cleared track bed. Between the distributor device and the rear undercarriage of the first work vehicle, a distribution conveyor belt is arranged, the discharge end of which as a second ballast outlet - for the application of a two layer of gravel on the first layer of gravel in the area of the intermediate compartments of the sleepers, which may be slightly raised. In the distributor device, a distributor member is pivotally mounted, through which a predeterminable portion of the cleaned ballast can be distributed to the first ballast outlet and the rest of the ballast can be distributed to the second ballast outlet via the distribution conveyor belt. The disadvantage of this plant is that the cleaned ballast that accumulates in varying amounts due to the often very different accumulation of overburden components either inevitably leads to an unevenly high or low second ballast layer; or all of the remaining cleaned ballast is thrown off over the second ballast outlet or completely dropped aside over the flank areas via the pivotable distribution conveyor belts. In addition, the second ballast outlet is still in the track area lifted by the same device from the target level, albeit slightly - depending on the lifting dimension - which means that ballast that still exists between the sleeper and the first ballast layer penetrates ballast in an uncontrolled manner and the track to an irregular height can spend. Irregular ballast accumulations or ballast gaps cannot always be avoided as a result, which cannot be improved even by the downstream ballast leveling device.

Furthermore, according to AT-PS 359 111, a mobile installation for cleaning the ballast bedding of a track with subsequent compaction of the ballast bedding is known. This system consists of a first work vehicle designed as a ballast bed cleaning machine with a conveyor and clearing chain and a screening plant with conveyor belts and a second work vehicle following this, which is designed as a ballast compacting machine with a ballast-threshold intermediate compacting unit and this lifting and straightening unit arranged upstream in the working direction . In front of the rear undercarriage of the first work vehicle, a first ballast outlet, which can optionally be fed with conveyor belts, is provided to form a first ballast layer on the cleared track bed. A second ballast outlet that can be fed via conveyor belts is located directly behind the front chassis of the second subordinate work vehicle and is designed as a ballast store with controllable outlet openings. The cleaned ballast is transported from the screening plant provided on the first work vehicle via a ballast distribution device with conveyor belts to the second ballast outlet. In the second embodiment of this AT patent 359 111, only one ballast outlet is provided on the first work vehicle. The second work vehicle has pairs of expanding stuffing tools designed as a push-thrust-deep compacting tool, which are also used to compress the intermediate sleeper compartments. In order to achieve a reasonably good distribution of ballast, complex middle and side plows - without track lifting devices - are connected upstream of the compacting unit.

According to AT-PS 375 426 by the same applicant, a mobile system for cleaning the ballast bedding of a track with two connected work vehicles is also known. The first working vehicle, which is at the rear in the working direction, is designed as a ballast bed cleaning machine with a conveyor and clearing chain provided for ballast pick-up, a track lifting device provided in its area and a screening system that can be fed by the conveyor and clearing chain. Below this, a ballast distribution device designed as a pivotable discharge conveyor belt is provided for transporting and reintroducing the cleaned ballast directly behind the ballast excavation point. The front working vehicle in the working direction is designed as a continuously (non-stop) tamping machine with a track tamping, lifting and straightening unit, the working units being mounted cyclically on a tiller-shaped support frame so that they can be moved from threshold to threshold. Such a system can also be used to clean a ballast bed with a relatively low height, without the track having to be subjected to an excessive bend for the passage of the conveyor and clearing chain in an inadmissible manner, in that the entire track in front of the first working vehicle is also tamped by the tamping machine is only stuffed up at every second or third threshold. A ballast leveling or compacting device is also provided in the area behind the ballast outlet.

Finally, according to DE-OS 34 24 687 by the same applicant, a mobile system for cleaning the ballast bedding of a track is known. This system consists of a first work vehicle with a conveyor and clearing chain arranged between its two undercarriages, intended for ballast pick-up, and a screening plant which can be fed by a conveyor belt and arranged on a second downstream work vehicle with a spoil conveyor. For transporting and reintroducing the cleaned ballast to a first ballast outlet provided directly behind the ballast excavation point and a second ballast outlet arranged directly in front of the rear chassis of the first work vehicle, a ballast distribution device with a plurality of conveyor belts arranged one behind the other is provided. The first ballast outlet is intended for a first ballast layer on the cleared track bed and the second ballast outlet for applying a second ballast layer to the first ballast layer in the area of the intermediate threshold compartments before any load from undercarriages. To increase performance, the screening plant is formed from two screening units which are independent of one another and form an inverted V, have a common ballast chute and separate ballast chute discharge points. The ballast distribution device is provided between the screening plant and the two ballast outlets on the first work vehicle, an intermediate store being arranged on a conveyor belt at the rear end for intermediate storage of cleaned ballast. In this system, too, the ballast is discharged only before the track structure is loaded.

The object of the invention is to provide a mobile system of the type described in the introduction, from which it is assumed that an improved and more precise or denser distribution of the resulting, cleaned ballast can be achieved in order to be sufficiently uniform afterwards or in the same work to create the ballast accumulations required for a subsequent tamping process in the right place, so that in the following the track can be driven at a relatively high speed with stuffed sleepers.

The object of the invention is now achieved with the mobile system described above in that the ballast distribution device for simultaneous or optional discharge of the cleaned ballast over the first and / or the second ballast outlet for the continuous formation of the first ballast layer and / or the second ballast layer and / or Forwarding of excess ballast during the right of way is formed with a deflection element which can be acted upon by a drive, the second ballast outlet, which is formed by the discharge end of the distribution conveyor belt which can optionally be cleaned with ballast, being provided behind the rear undercarriage of the first work vehicle.

Such a system with a ballast distribution device for the simultaneous or optional discharge of the cleaned ballast in a first and a second ballast outlet and for the transfer of excess ballast, e.g. to a subsequent loading wagon, enables the creation of a uniform first ballast layer regardless of the fluctuating amount of cleaned ballast an equally even second layer of gravel between the sleepers. With the arrangement of the second ballast outlet in the working direction behind the rear undercarriage of the first work vehicle, the pressure load on the undercarriage on the rail structure formed by the sleepers and rails ensures that it is fully supported on the first ballast layer before the sleeper compartments are ballasted through the second ballast outlet. In particular, this system can therefore be used to create a really consistently uniform and optionally selectable height of the first layer of ballast with a correspondingly uniform height and the second layer of ballast in the intermediate sleepers depending on the resulting cleaned ballast volume of the track before the tamping . With the system according to the invention, therefore, a constantly precise track height position and a uniform track ballast can be created as a particularly advantageous prerequisite for a subsequent uniform tamping of the sleeper supports. This tamping can within the scope of the invention regardless of the system in a short time interval or by a tamping device connected to the system be carried out in a single operation.

An advantageous embodiment of the invention is characterized in that the second ballast outlet is formed by the dropping end of at least one endless, preferably trough-shaped distribution conveyor belt, which projects to the rear undercarriage of the first work vehicle or extends cantilevered above it. The displaceable mounting of the endless distribution conveyor belt creates the possibility in a structurally particularly simple way, if necessary, the second ballast outlet in the working direction to the rear - e.g. with a connected tamping machine directly in front of the work units. In addition, a projecting position of the discharge end can be reached with the displaceable mounting, so that the second ballast outlet can be formed directly behind the chassis of the first work vehicle. This solution can be implemented in particular with relatively little effort in known ballast bed cleaning machines.

According to a further advantageous embodiment of the invention, the second ballast outlet can be formed by the shedding end of at least one endless, preferably gutter-shaped distribution conveyor belt that extends to the rear undercarriage of the first work vehicle or is also cantilevered. Such a ballast outlet can be modified in a simple manner, for example by arranging chutes or redirecting elements, as a result of which the ballast can be concentrated in a targeted manner on the sleeper support areas located on both sides of a rail track. This solution, which is simple in construction, can also be easily implemented in known ballast bed cleaning machines.

A particularly advantageous embodiment of the invention is characterized in that the second ballast outlet behind the rear undercarriage of the first work vehicle up to immediately behind a front undercarriage of a downstream third - with a ballast accumulator and via an adjustment drive to this track pot lifting and relocating Straightening unit permitted - work vehicle is provided and is formed by controllable outlet openings with outlet chutes of the ballast store which can be fed by one of the preferably trough-shaped distribution conveyor belts. With the shifting of the second ballast outlet to a third work vehicle designed as a tamping machine, the operator of the tamping unit can carry out a targeted ballasting of the track for a uniform tamping result in the same operation. The formation of the ballast outlet as ballast storage with controllable outlet openings, regardless of the amount of ballast accumulating irregularly from the screening plant, creates the possibility of continuously uniform ballast discharge. In addition, the ballast still occurring in the event of a sudden stop of the plant due to the wake of the screening plant and the ballast distribution device can be temporarily stored, avoiding disadvantageous ballast accumulations. In this way, however, sections with a particularly large amount of overburden and a small proportion of ballast can be bridged by throwing off ballast stored in these sections in order to maintain a uniform second layer of ballast. With the system according to the invention, the ballast bed can be cleaned in one operation with a complete and uniform track ballast, together with the immediate creation of evenly stuffed sleeper supports for a permanent, accurate track position.

According to a further, particularly advantageous embodiment, the invention is characterized in that in each case two first and second ballast outlets arranged adjacent to the longitudinal direction of the track and approximately above the two rail tracks - to form two ballast layers running continuously in the longitudinal direction of the track and parallel to one another or to create the ballast layers in the individual threshold intermediate compartments of the crossing points rails / threshold of both rail tracks - are provided. With the first two ballast outlets that run transversely to the machine's longitudinal direction, a targeted division of the ballast into the area of the sleepers running under the rails as two is economically parallel running gravel banks possible. These are pre-compacted, so to speak, by the subsequent, loaded track structure, after which enough ballast for sufficient and uniform tamping can then be supplied through the second ballast layer from the second ballast outlet in the sleeper compartments.

According to a further expedient feature of the invention, a compacting device, preferably formed by a compacting bar formed by drives that can be displaced by striking movements, is arranged on the first working vehicle in the area of the first ballast outlet, in particular immediately in front of the accumulated amount of ballast - to compact the introduced first ballast layer against the working direction. With such a compacting device, the accumulation of ballast that occurs when the ballast is thrown is precompressed against the working direction, and preferably in two gravel banks running underneath the rail tracks, which are then precompressed even more by the resistance of the track grate. With this compacting device, the sleeper support area, which is decisive for a permanent track position, is subjected to a pre-compression immediately after the ballast has been thrown, which is further reinforced by the pressure of the following undercarriage or another undercarriage located in front of the second ballast outlet.

Further advantages of the invention are achieved in that the screen system formed by the screen units arranged approximately in the center of the second upstream work vehicle and preferably loaded by two independent individual conveyor belts and which can be fed by the preferably gutter-shaped transport conveyor belt, - cleaned ballast accumulated over a buffer storage device and via one Endless, independently actuated drive belt can be fed, at least partially, optionally via a control device and the ballast distribution device to the first and / or third work vehicle to the first or second ballast outlet for ballast reintroduction or for further transport of excess ballast. With such a buffer in the gravel The distribution device can supply both ballast outlets - regardless of the fluctuating amounts of cleaned ballast - evenly ballast for the formation of consistently high ballast layers. The intermediate store is also of particular advantage in that the use of two completely independent sieve units results in a particularly high sieving capacity with two outlet cross-sections which are separate from one another but bring together. By means of the control device, the ballast distribution device with the deflection elements can also be controlled so that, with a corresponding change, only the excess ballast quantities transported beyond the second ballast outlet are constantly uniform ballast quantities available for both ballast outlets.

According to a further expedient feature of the invention, the second ballast outlet, which is formed by the outlet openings of the ballast store arranged on the third work vehicle and can be fed via the deflection element of the ballast distribution device via two series-connected distribution conveyor belts, is optionally at least partially closable, with the discharge end of the second distribution conveyor belt being one or more above the third Transport conveyor belts arranged after the work vehicle are arranged with the interposition of a further deflecting element for the further transport of excess ballast. The arrangement of the deflecting element above the ballast storage means that the ballast flow can be easily and optionally diverted into the ballast storage and / or onto the transport conveyor belt for the removal of excess ballast, with appropriate pivoting. This enables a particularly rapid adaptation to different ballast conditions and excess ballast does not have to be thrown off to the side, which is often the case, e.g. in station areas, is not possible at all.

Finally, a further advantageous embodiment of the invention is that the ballast distribution device with a control device for optional individual regulation of the optional admission of the first or second ballast outlet or forwarding of excess ballast in connection, which is provided on the first work vehicle in an operating cabin for direct observation of the ballast discharge in the area of the excavation point and that preferably all three work vehicles are equipped with operating cabins for monitoring the working tools, the ballast outlets and in particular the ballast flow. This training enables the exact adjustment to the desired height of the first ballast layer for a uniform height of the track and also an exact adjustment of the second ballast layer while constantly monitoring the ballast excavation and ballast insertion point - and possibly also the ballast storage. Further adjustment of the ballast volume can also be achieved, for example, by adjusting the height of the conveyor and clearing chain.

The invention is described in more detail below with reference to exemplary embodiments shown in the drawing.

• Fig.1 eine Seitenansicht des vordersten Abschnittes einer fahrba­ren Anlage gemäß der Erfindung zum Reinigen der Schotterbettung,
• Fig.2 eine Seitenansicht des mittleren Abschnittes der erfindungs­gemäßen fahrbaren Anlage,
• Fig.3 eine Seitenansicht des hinteren Abschnittes der fahrbaren Anlage nach der Erfindung,
• Fig.4 eine schematisch stark vereinfachte Detail-Seitenansicht einer weiteren Ausführungsvariante einer Schotterverteileinrich­tung zum Wiedereinbringen des gereinigten Schotters beim zweiten Schotterauslaß,
• Fig.5 eine Teil-Draufsicht auf die fahrbare Anlage gemäß Fig.1, 2 und 3,
• Fig.6 eine stark schematisierte Gesamt-Seitenansicht der erfin­dungsgemäßen Anlage gemäß den Fig.1 bis 3 mit dem ersten, zweiten und dritten Arbeitsfahrzeug, wobei die Transportwege für den Schot­ter und Abraum zur deutlicheren Hervorhebung mit Pfeilen darge­stellt sind und
• Fig.7 eine stark vereinfachte Seitenansicht eines weiteren Aus­führungsbeispieles einer erfindungsgemäß ausgebildeten fahrba­ren Anlage.

Show it:

• 1 shows a side view of the foremost section of a mobile installation according to the invention for cleaning the ballast bed,
• 2 shows a side view of the middle section of the mobile installation according to the invention,
• 3 shows a side view of the rear section of the mobile installation according to the invention,
• 4 shows a schematically, greatly simplified, detailed side view of a further embodiment variant of a ballast distribution device for reintroducing the cleaned ballast at the second ballast outlet,
• 5 shows a partial top view of the mobile installation according to FIGS. 1, 2 and 3,
• 6 shows a highly schematic overall side view of the system according to the invention according to FIGS. 1 to 3 with the first, second and third work vehicle, the transport routes for the ballast and overburden being shown with arrows for clearer emphasis and
• 7 shows a greatly simplified side view of a further exemplary embodiment of a mobile installation designed according to the invention.

A mobile system 1 shown in FIGS. 1 to 3 for cleaning the ballast bed of a track 4 formed from sleepers 2 and rails 3 consists of a central, first work vehicle 5 with a conveyor and clearing chain 6, a second work vehicle 7 arranged upstream thereof, and a subordinate third work vehicle 8 formed. The conveyor and clearing chain 6, which is arranged in a height-adjustable manner on the first work vehicle 5, is designed for continuous ballast pick-up with an endless chain which can be rotated by means of a drive and has a scratch finger and is guided under the track 4. In the area of the discharge point located at the upper end, the receiving end of a transport conveyor belt 9 designed for transporting the picked up ballast is provided to a screening plant 10 located on the second work vehicle 7. This consists of two sieve units 11, which are arranged one behind the other in the machine longitudinal direction and in the transverse direction of the track and are arranged in a V-shape with respect to one another, each with its own vibration drive 12 receiving-side ends are arranged below the discharge end of the conveyor belt 9. A spoil conveyor belt 16 for transporting the spoil in the working direction shown by an arrow 17 to a bulk material loading train 18 arranged in front of the plant 1 is arranged below the screening plant 10 arranged on a machine frame 14 with rail carriages 15 at the ends.

The cleaned ballast is reintroduced by a ballast distribution device 19 with conveyor belts 20 to a first ballast outlet 22 provided immediately behind the ballast excavation point 21. This is a ballast distribution chute 24 connected to a machine frame 23 of the first work vehicle 5 with between the rails 3 and in each case in swell Head area arranged outlet openings formed. The ballast distribution device 19 is for simultaneous or optional discharge of the cleaned ballast over the first and / or a second ballast outlet 25 for the continuous formation of a first ballast layer 26 and / or a second ballast layer 28 located in the sleeper compartments 27 and / or for the transfer of excess ballast a deflecting element 3o which can be acted upon by a drive 29 (FIG. 5). The second ballast outlet 25, formed by the discharge end 31 of a distribution conveyor belt 32 which can optionally be cleaned with cleaned ballast, is provided behind a rear undercarriage 33 of the first work vehicle 5. The deflecting member 3o is arranged in the receiving end region of the distribution conveyor belt 32 adjoining the first ballast outlet 22. As can be seen in FIG. 1, the cleaned ballast from the screening system 10 is via an endless conveyor belt 36, which is designed as a buffer 34 and can be acted upon independently by a drive 35, optionally via a control device 37 and the ballast distribution device 19, the first and / or third work vehicle 5 , 8 can be fed to the first or second ballast outlet 22, 25 for ballast recovery or for further transport of excess ballast.

As can be seen from FIG. 2, an energy supply center 38, a travel drive 39 and a work cabin 4o are provided on the first work vehicle 5, and a compacting device 41 is arranged in the area of the first ballast outlet 22 for compressing the introduced first ballast layer 26 against the working direction. This is formed from a Schopp beam 42 provided for compacting the ballast, the upper end of which is pivotably mounted on the machine frame 23 and is connected to drives for executing striking movements in the longitudinal direction of the track. An operating cabin 43 is provided on the first work vehicle 5 for direct observation of the ballast discharge in the area of the ballast excavation point 21. In the area of the conveyor chain 6, a height-adjustable track lifting device 44 and an auxiliary lifting device 45 are articulated in particular for the introduction of the conveyor and clearing chain 6 to the machine frame 23 for track connections. The compression device 41 is also a hold-down device 46 immediately upstream bar, which is formed from a pivotable on the machine frame 23 and rollable on the track 4 Sprukranzradpaar with a height adjustment drive.

The second ballast outlet 25 shown in FIG. 3 is provided directly behind a front chassis 47 of the third work vehicle 8 with a ballast store 49 having controllable outlet openings 48. This is located exactly below the discharge end 31 of the distribution conveyor belt 32. This is followed by a further deflecting element 50 with subsequent conveyor belt belts 51 for the further transport of excess ballast to a subsequent ballast transport loading train 52. The rear of the two transport conveyor belts 51 in the working direction is designed to be displaceable in the machine longitudinal direction. Downstream of the ballast accumulator 49 is a track tamping and lifting straightening unit 53, which is mounted in a longitudinally displaceable manner in guides of the machine frame 56 via an adjustment drive 55. Downstream of the tamping unit 53 is an operating cabin 57 and a height-adjustable sweeping device 58 with a rotatable sweeping brush that extends over the entire track width and a cross conveyor belt. A drive 59 is provided to supply the work units arranged on the third work vehicle 8.

A rear end, shown in FIG. 4, of a first work vehicle 6o with a rear chassis 61 has a distribution conveyor belt 62 with a discharge end 64 forming the second ballast outlet 63. The distribution conveyor belt 62 can be moved in the longitudinal direction of the track into the position indicated by dash-dotted lines up to the rear undercarriage 61 of the first work vehicle 6o or above it according to the double arrow. The first work vehicle 6o can be assigned a third work vehicle 65 (in dash-dotted lines) with a conveyor belt 66 for extending the distribution conveyor belt 62 and optionally shifting the second ballast outlet 63 behind the front chassis of the third work vehicle 65.

As can be seen in the top view of the system 1 according to FIG the ballast distributing device 19 in the area of the screening plant 10 is designed in the form of two collecting conveyor belts 67 which run parallel to one another and in the machine longitudinal direction and are cross-sectionally shaped and which are arranged at a distance from one another. The overburden conveyor belt 16, which is also trough-shaped in cross section, is arranged centrally between the two collecting conveyor belts 67. In order to form two ballast layers 26 running continuously in the longitudinal direction of the track and parallel to one another or to create the ballast layers 28 in the individual threshold intermediate compartments of the crossing points 68 of rails / threshold of both rail tracks, two first and second ballast outlets are arranged adjacent to the longitudinal track direction and approximately above the two rail tracks 22 and 25 respectively.

The conveyor belts, with the exception of the conveyor belt 36 assigned to the intermediate store 34, are concave or channel-shaped in cross section. In this way, larger gravel or. Spoil quantities are transported over longer distances without the material being conveyed falling laterally onto the machine parts or work units located underneath it and thus disrupting the workflow on the system.

In Fig. 6, the transport routes of the ballast and the overburden are clearly shown by arrows. The contaminated ballast lifted by the conveyor and clearing chain 6 arrives at the conveyor belt 9 represented by short, dashed arrows and is thrown by it onto the two throw-in conveyor belts 13 and from there finally onto the two sieving units 11. The cleaned ballast is shown on the ballast distribution device 19, with long arrows, against the direction of work from the second work vehicle 7 via the intermediate storage 34 to the first ballast outlet 22 on the first work vehicle 5 and partially thrown there onto the formation. The remaining part is conveyed to the second ballast outlet 25 located on the third work vehicle 8. The excess ballast finally arrives on the subsequent ballast transport loading train.

A mobile system 69 according to FIG. 7 also consists of a middle first, an upstream second and a downstream third work vehicle 7o, 71, 72. The first work vehicle 7o is supported with its front end in an articulated manner at the rear end of the second work vehicle 71 and with its rear end via a height adjustment drive 73 at the front end of the third work vehicle 72. Immediately behind a height-adjustable conveyor and clearing chain 74 is a rail running gear connected to a track lifting device, which is raised in the working state by actuating the height adjustment drive 73 and is provided for transfer runs on the track 75 at the end of work. A first ballast outlet 76, formed by a distribution chute with a deflection element, is provided between the conveyor and clearing chain 74 and the rail running gear for the formation of a first ballast layer 77. A second ballast outlet 78 is formed on the third work vehicle 72 as ballast accumulator 79 with controllable outlet openings. A transport conveyor belt 81 provided for transporting the contaminated ballast to a screening plant 8o with vibrating screens is shown in schematic form with short arrows. The cleaned ballast passes through a ballast distribution device 82 shown with long arrows to the two Scotter outlets 76, 78 or as excess ballast to a subsequent loading wagon. A spoil conveyor belt 83 (dash-dotted arrows) is provided for the removal of the spoil. A longitudinally displaceable track tamping and lifting-straightening unit 85, 86 is arranged on the third work vehicle 72 having a drive 84. With the second ballast outlet 78, a second ballast layer 87 for filling the sleeper compartments is formed.

The mode of operation of the mobile system shown in FIGS. 1 to 3 and 5, 6 is described in more detail below.

After the chain guide cross strand of the conveyor and clearing chain 6 has been carried out by gripping the track 4 by the auxiliary lifting device 45 and the track lifting device 44 under the track 4, the working units are put into operation by the operators located in the operating cabins 4o and 43.

Due to the rotating and clearing chain 6, the contaminated ballast is continuously taken up from the ballast bed and dropped onto the conveyor belt 9. From this, the ballast is transported in the working direction to the front second work vehicle 7 and is dropped in the area of the drop point onto both throw-in conveyor belts 13 located below. Via this, the ballast finally reaches both sieving units 11 which are vibrated by the respective vibration drive 12. By changing the rotational speed of the conveyor belt 9 accordingly, the discharge parabola of the ballast can be changed such that e.g. on the front throw-in conveyor belt 13 more or the entire ballast falls. This has the advantage that e.g. in the case of track sections with a lower ballast bed height and less ballast accumulation, a screening unit 11 can be taken out of operation. The overburden separated from the ballast by the vibrating sieves of the sieving units 11 falls on the central overburden conveyor belt 16 in the area of the entire screening plant 1o and is conveyed by this in the working direction to the bulk material loading train 18.

The cleaned ballast falls on the two lateral collecting conveyor belts 67 of the ballast distribution device 19 located below the screening plant 10 and is thrown off into the intermediate storage 34 by the latter. Regardless of this ballast accumulation, the storage conveyor belt 36 is controlled with the aid of the drive 35 in such a way that there is always sufficient ballast in the area of the two ballast outlets 22 and 25. The ballast is transported from the storage conveyor belt 36 to the first ballast outlet 22 located in the area of the ballast excavation point 21 via the ballast distribution device 19. There, depending on the position of the deflection element 3o, part of the cleaned ballast reaches the subgrade via the ballast distribution chute 24 through the raised track 4. This non-compacted ballast lying on the level and forming the first ballast layer 26 is compacted by the continuous striking movement of the compacting device 41 with the aid of the Schopp beam 42 below the sleepers 2 in the longitudinal direction of the track. Immediately in the working direction, there is then further compaction by the rear undercarriage 33 of the first work vehicle 5 resting on the track structure.

As can be seen from FIGS. 2 and 3, the ballast thrown behind the deflection element 3o can be transported through the distribution conveyor belts 32 against the working direction to the following third work vehicle 8 and in the region of the discharge end 31, depending on the position of the deflection element 5o, into the ballast storage below 49 and / or be dropped onto the subsequent conveyor belt 51. Via the controllable outlet openings 48, the ballast located in the ballast store 49 finally arrives in the second ballast outlet 25 to form a second ballast layer 28 in the sleeper intermediate compartments 27 of the track 4. The amount of ballast emerging from the outlet openings 48 is dependent on the worker located in the operating cabin 57 required for the following tamping controlled. The excess ballast falling behind the deflection element 5o onto the transport conveyor belt 51 is dropped onto the ballast transport loading train 52 following the system 1. During the continuous (non-stop) approach to work of the system 1, the track 4, newly ballasted by the first ballast layer 26 and the second ballast layer 28, is tamped in one operation by the track pot and lifting / leveling unit 53, 54 cyclically using the adjustment drive 55 is moved from one to the next threshold 2. Any ballast lying on the sleepers after the tamping process is picked up by the sweeping device 58 located at the rear end of the system 1 and conveyed onto the ballast bed flank with the aid of the cross conveyor belt. The hold-down device 46 located directly in front of the compacting device 41 also prevents the track 4 from being raised in an uncontrolled manner by the compacting forces of the compacting device 41. The height control of this hold-down device 46, like the control of the ballast discharge in the area of the first ballast outlet 22, is carried out by the worker located in the operating cabin 43 via the central control device 37. The control of the deflection element 5o takes place as a function of the filling state of the ballast store 49 located underneath. As soon as this is full, the deflection element 5o is pivoted forward with its free end below the discharge end 31 (FIG. 3), so that the whole of the distribution conveyor belt 32 transported ballast as excess ballast is dropped onto the conveyor belt 51 and for loading on the ballast transport loading train 52. As soon as the storage capacity of the ballast store 49 comes to an end, the deflection element 5o is pivoted somewhat backwards, so that a part of the cleaned ballast is in turn conveyed to the ballast store 49 and, in the case of larger amounts of ballast, a part is carried on as excess ballast. If smaller amounts of ballast are obtained, the deflection element 5o is pivoted so far back that the entire ballast transported on the distribution conveyor belt 32 is deflected into the ballast store 49.

Claims (9)

1. Mobile system (1; 69) for cleaning the ballast bedding of a track, with a on a first work vehicle (5; 70) between its two bogies (33) in the area of a track lifting device (44) arranged vertically adjustable, provided for ballast pickup and Clearing chain (6; 74) and a screening system (10; 80) with a spoil conveyor (16; 83), which can be fed by a conveyor belt (9; 81) and is arranged on a second upstream work vehicle (7; 71), and with a ballast distribution device (19 ; 82) with conveyor belts for transporting and reintroducing the cleaned ballast to a first ballast outlet (22; 76) provided directly behind the ballast excavation point - for a first ballast layer (26; 77) on the cleared track bed and / or via a distribution conveyor belt to one second ballast outlet (22,25; 76,78) downstream in the working direction - for applying a second ballast layer (28; 87) to the first ballast layer (26; 77), characterized in that the ballast distribution device (19, 82) for simultaneous or optional discharge of the cleaned ballast over the first and / or the second ballast outlet (22, 25; 76, 78) for the continuous formation of the first ballast layer (26; 77) and / or the second ballast layer (28; 87) and / or the transfer of excess ballast during work drive is designed with a deflecting element (30) which can be acted upon by a drive (29), the second one being discharged by the discharge end (31) of the distribution conveyor belt (which can optionally be cleaned with cleaned ballast) ( 32) formed ballast outlet (25; 78) is provided behind the rear chassis (33) of the first work vehicle (5; 70). 2. Installation according to claim 1, characterized in that the second ballast outlet (63) through the to the rear chassis (61) of the first work vehicle (60) or projecting projecting end (64) of at least one slidably formed in the longitudinal direction, preferably endless trough-shaped distribution conveyor belt (62) is formed (Fig.4). 3. Plant according to claim 1, characterized in that the second ballast outlet (25) through the discharge end (31) at least one to the rear chassis (33) of the first work vehicle (5) reaching or beyond cantilevered arranged, preferably channel-shaped distribution conveyor belt (32) is formed (Fig.3). 4. Plant according to one of claims 1 to 3, characterized in that the second ballast outlet (25) behind the rear chassis (33) of the first work vehicle (5) to immediately behind a front chassis (47) of a downstream third - with a ballast accumulator (49) and via an adjustment drive (55) to this relatively displaceably designed track pot lifting and straightening unit (53, 54) - a work vehicle (8) is provided and through adjustable outlet openings (48) with outlet chutes of one of the preferably trough-shaped distribution conveyor belts (32) loadable ballast storage (49) is formed. 5. Plant according to one of claims 1 to 4, characterized in that two transverse to the longitudinal direction adjacent and approximately above the two rail tracks arranged first and second ballast outlets (22 and 25) - to form two continuously in the longitudinal direction and parallel to each other gravel layers (26) or to create the ballast layers (28) in the individual threshold intermediate compartments of the crossing points (68) rails / threshold of both rail tracks - are provided (Fig. 5). 6. Plant according to one of claims 1 to 5, characterized in that on the first work vehicle (5) in the region of the first ballast outlet (22) in particular immediately before the accumulated amount of ballast - for compacting the introduced first ballast layer 926) against the working direction - one, is preferably arranged by a compacting device (41) formed by drives that can be displaced in striking movements (42). 7. Plant according to one of claims 1 to 6, characterized in that - arranged from the approximately centrally on the second upstream work vehicle (7) and preferably by two independent of each other via individual conveyor belts and the preferably trough-shaped transport conveyor belt (9) Screening units (11) formed screening plant (1o) - accumulated cleaned ballast via an endless conveyor belt (36) designed as a buffer (34) and which can be acted upon independently by a drive (35) optionally via a control device and the ballast distribution device (19) the first and / or third work vehicle (5, 8) can be fed, at least partially, to the first or second ballast outlet (22, 25) for ballast reintroduction or for further transport of excess ballast. 8. Installation according to one of claims 1 to 7, in particular 3 and 4, characterized in that through the outlet openings (48) of the ballast accumulator (49) arranged on the third work vehicle (8) and via the deflection element (3o) of the ballast distribution device ( 19) via two series-connected distribution conveyor belts (32) that can be loaded, second ballast outlet (25) is optionally at least partially closable and the discharge end (31) of the second distribution conveyor belt (32) has one or more transport conveyor belts (51) arranged above the third work vehicle with the interposition of a further deflection element (5o) for the further transport of excess ballast. 9. Plant according to one of claims 1 to 8, characterized in that the ballast distribution device (19) with a control device (37) for optional individual control of the optional loading of the first or second ballast outlet (22, 25) or forwarding of excess ballast is connected , which is provided on the first work vehicle (5) in an operating cabin (43) for direct observation of the ballast discharge in the area of the excavation point (21) and that preferably all three work vehicles with operating cabins (43, 57) are equipped to observe the working tools, the ballast outlets and in particular the ballast flow.

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