EP1951959B1 - Method and installation for cleaning of a ballast bed of a track - Google Patents

Abstract

Method involves accomplishing of first and second working process alternatively, depending on the degree of contamination of the ballast bed (2). In the first working process, an upper layer (34) of the ballast is received by a front, with respect to working direction, clearance apparatus (16) and is supplied to the first conveyer belt unit (27). In parallel with this, the rest of the ballast (25) is received by a rear, with respect to the working direction, clearance apparatus (20) and is supplied to a second conveyer belt unit (29), in order to carry it away for disposal. In second working process, the ballast is received exclusively by the rear clearance apparatus and is diverted for cleaning to the first conveyor belt unit, with the front clearance apparatus being in an out-of-use position. An independent claim is also included for the installation for cleaning of a ballast bed of a track.

Description

The invention relates to a method for rehabilitating a ballast bed of a track according to the features cited in the preamble of claim 1, wherein contaminated ballast is picked up by a clearing device and fed through a first conveyor belt unit to a screen unit for cleaning, and a system according to the preamble of claim 2 cited characteristics.

By EP 0 681 062 B1 Such a plant and method for ballast bed rehabilitation is known. By a front first clearing device, the inclusion of an upper layer of gravel takes place in order to return this after cleaning for reuse in the bedding. The remaining and very heavily polluted ballast is taken up by a subsequent second clearing device and cached in storage vehicles for disposal. Such machines are used for tarpaulin remediation whereby the subsoil is improved by removing a soiled ballast layer and introducing a shroud protective layer.

By US 6 637 133 It is also known to improve the receiving capacity of the clearing device insofar as the bedding to be cleaned by the common use of a first and a second clearing device added and a sieve for cleaning together is supplied. This version is especially suitable for a particularly efficient screening plant.

The object of the present invention is now to provide a method of the type mentioned, with a better adaptation to different conditions of use is possible.

This object is achieved by a method of the generic type by the features cited in the characterizing part of claim 1.

The choice created by this method between two different types of use allows advantageously to respond to various conditions prevailing at the workplace conditions and thereby optimize the work success. Depending on the degree of soiling, either only the upper part of the ballast bed can be cleaned, while the lower part can be removed or removed via the second conveyor belt unit, but not reused. On the other hand, it is also possible, only by means of the second, larger clearing device to excavate the entire ballast bed at one go and to feed it to a cleaning, after which the cleaned gravel is re-introduced onto the subgrade.

Further advantages of the invention will become apparent from claim 2 and the drawing description.

In the following the invention will be described with reference to an embodiment shown in the drawing. Show it:

Fig. 1 and 2 a side view of a plant for ballast bed rehabilitation during use for carrying out the method according to the invention A, and

3 and 4 the said plant when used in accordance with method B.

One in the Fig. 1 and 2 (respectively. 3 and 4 ) plant 1 shown for the rehabilitation of a ballast bed 2 of a track 3 consists of a number of coupled with each other and tracked by rail chassis 4 in a working direction 5 trackable vehicles 6. These consist essentially of a lifting machine 7, one of these upstream in the working direction 5 ballast processing 8th , a screening car 9 and other, not shown here in detail vehicles together.

The excavating machine 7 has a machine frame 13 formed from two frame parts 11, 12 which are interconnected by a joint 10. Based on an above the joint 10 arranged spreading drive 14, the frame parts 11 and 12 can be spread apart, whereby a provided in the joint area rail chassis 4 can be raised in the vertical direction. In this case, the rail chassis 4 remains in contact with the track 3, which is automatically lifted by means of rail grabs 15.

The front frame part 11 in the working direction 5 is connected to a front clearing device 16 in the form of a height-adjustable and side-adjustable or rotationally displaceable, endless clearing chain 19 for receiving contaminated ballast 25 by means of drives 17 or 18. This is a receiving end 26 of a first conveyor belt unit 27 assigned, which runs in the machine longitudinal direction to the ballast processing cart 8 and on to the screening carriage 9 and is shown in the form of a dash-dotted thick line.

At the rear frame part 12 is another, rear clearing device 20, which is designed as height and side adjustable by drives 21 or rotatable by a drive 22, endless Räumkette 23 and a receiving end 28 of a running in the machine longitudinal direction second conveyor belt unit 29 is assigned. This runs above the first conveyor belt unit 27 approximately parallel to this. A further, third conveyor belt unit 30 (represented by dashed thick lines) is provided in order to transport the gravel cleaned in the screening trolley 9 back against the working direction 5 behind the excavation point and to throw it back into the track 3.

In the front end region 32 of the excavating machine 7, a deflection device 33 is provided, which serves to redirect the coming of the rear clearing device 20 ballast 25 selectively from the second conveyor belt unit 29 to the first conveyor belt unit 27. in the In this case, this deflection device 33 consists of a pivoting drive 24, by means of which the rear end 35 of the working direction 5 of a conveyor belt 36 forming part of the second conveyor belt unit 29 can be folded up in the vertical direction (see Fig. 4 ). As a result, the immediately underlying conveyor belt 37 of the first conveyor belt unit 27 is virtually uncovered, so that the ballast 25 can now simply fall from the second conveyor belt unit 29 directly onto the first conveyor belt unit 27.

In the following, the two variants A and B of the method according to the invention will be briefly described.

In the first working procedure A (see Fig. 1 and 2 ) is - when raised by the rail gripper 15 and further track lifting devices 38 track 3 - based on the front sweeping device 16, only the upper gravel layer 34 of the ballast bed 2 removed. This contaminated ballast 25 is transported on the basis of the first conveyor belt unit 27 in the working direction 5 forward to a screen unit 39 of the screen carriage 9 (see small arrows). When passing through the ballast processing wagon 8, the ballast 25 may, if desired, also be pretreated by a pre-separator 40 and / or an impact crusher 41 in order to increase the cleaning performance. The cleaned ballast is transported back by means of the third conveyor belt unit 30 from the screen 39 counter to the working direction 5, in the area behind the rear Clearing device 20 on the now rehabilitated Planum 31 to be dropped again. Parallel to this, the remainder of the ballast 25 of the ballast bed 2 is excavated by means of the second, rear clearing device 20, which is transported via the second conveyor belt unit 29 in the working direction 5 forward to an end 42 of the installation 1 and there - together with that from the pre-separator 40 , Impact crusher 41 and sieve 39 accumulating overburden - is loaded for disposal, for example, not shown bulk goods transport car.

In contrast, in the second working method B (see 3 and 4 ) the front clearing device 16 is not in use or is the front clearing chain 19 in its raised inoperative position. In this use of the system 1 as a high-performance cleaning machine, the clearing chain 23 of the rear clearing device 20 now lifts the entire ballast bed 2 at once and discards the contaminated ballast 25 onto the second conveyor belt unit 29. In the front end region 32 of the excavating machine 7, the ballast 25 is now redirected due to the folded deflection 33 on the directly underlying first conveyor belt unit 27 and supplied from this the screening unit 39 for ballast cleaning, then returned to the third conveyor belt unit 30 back to track 3 become. To increase the screening performance, it is advantageous if the ballast 25 is pre-cleaned by the pre-separator 40 and the impact crusher 41. This makes it possible to clean with just a single screen the recorded by the very powerful clearing chain 23 amounts of ballast.

In the context of the invention, other embodiments for the deflection 33 are possible. Thus, instead of being folded up, the end 35 of the conveyor belt 36 could simply be pivoted laterally or horizontally, or also displaced in its longitudinal direction, to access the underlying conveyor belt 37 of the first conveyor belt unit 27. A use of Umlenkklappen would be conceivable.

Claims (2)

1. A method for rehabilitation of a ballast bed (2) of a track (3), wherein fouled ballast (25) is picked up by a clearing device (16, 20) and transported by a first conveyor belt unit (27) to a screening unit (39) for cleaning, and, in a first working method (A), an upper layer (34) of the ballast is picked up by a front clearing device (16) - with regard to a working direction - and transported to the first conveyor belt unit (27), while parallel thereto the remaining ballast (25) is picked up by a rear clearing device (20) - with regard to the working direction - and transported to a second conveyor belt unit (29) to be carried away for disposal, characterized by a second working method (B) which may be carried out selectively in dependence upon the degree of fouling of the ballast bed (2), wherein the ballast (25) is picked up exclusively by the rear clearing device (20) and deflected onto the first conveyor belt unit (27) for cleaning, while the front clearing device (16) is in an inoperative position.
2. An arrangement for rehabilitation of a ballast bed (2) of a track (3), consisting of a number of vehicles (6) coupled to one another, the arrangement including a front clearing device (16), with regard to a working direction (5), for picking up an upper ballast layer (34) and discharging the same upon a first conveyor belt unit (27) for further transport to a screening unit (39), and a rear clearing device (20) provided for picking up the remaining ballast (25) situated below the upper ballast layer (34), wherein a receiving end (28) of a second conveyor belt unit (29) for further transport to an end (42) of the arrangement is associated with the rear clearing device (20), characterized in that a deflecting device (33) is provided for selectively diverting the ballast from the second to the first conveyor belt unit (29,27).

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