SE434963B - Method and rail-mounted vehicle for, in an essentially continuous operation, replacing sleeper blocks and rails for a railway track - Google Patents

Abstract

Sleeper blocks and rails for a railway track are replaced in an essentially continuous operation by using a rail-mounted vehicle 30 with front wheels 30a which run on the original track 1 and rear wheels 30b which run on the newly laid track 2. After the front wheels have passed, original rails are moved aside and old sleeper blocks 3 and ballast material are ploughed up in order to create a fundamentally plane foundation surface 41 for new sleeper blocks 4. By means of a transfer wheel 42 and a laying wheel 46, these are made, before laying, to pass along an S-shaped path and are laid towards the rear in relation to the direction of movement of the rail-mounted vehicle 30, so that, at the moment of laying, they have essentially zero speed in relation to the surface. Ploughed-up ballast material is dealt with by a conveying arrangement 55 and is fed down between the sleeper blocks during their passage along the path. During the laying operation, the sleeper blocks are guided accurately in the lateral direction, by virtue of which subsequent laying and anchoring of new rails 2 is made easier. After the rail-mounted vehicle has passed, the track is ready to be used to the full extent. <IMAGE>

Description

8007198-8 to obtain the desired level, some of the ballast material must be plowed out to the sides.> 3) In the area between the front and rear axles of the rail vehicle, there is a device that lays the new sleeper blocks on the planned ballast bed at specified distances and with predetermined tolerance requirements. applies to the lateral position of the sleeper blocks. 4) The paving vehicle is part of a train set} which has devices for transport and storage of new and old sleeper blocks to resp. from the paving vehicle. 5) In addition, there shall be devices for guiding new and old rails from the old resp. to the correct position on the new sleeper blocks.

In the procedures described so far briefly described above, e.g. possibility to transfer the ballast material existing between the old sleeper blocks to the spaces between the new sleeper blocks directly in connection with the track change. This causes diapers. the following serious inconveniences: l) Immediately after the replacement operation, the new track lies on a flat bed base and cannot be given the desired stability until after the addition of new ballast material, which fills the space around the sleeper blocks. 2) The height of the new track is affected by the work operations, since only a small part of the excess ballast from the old track can be carried out to the sides of the track.

This i.a. for reasons of space, partly with regard to the old and new rails lying on top of each other during the exchange operation and partly and especially with regard to facilities close to the track, for example platforms.

The mentioned disadvantages primarily entail increased costs for ballast material, and furthermore, considerable restrictions arise with regard to the track's traffic after the replacement operation. Trains which are driven on a track laid according to known methods 8007198-8 must thus be driven at a very low speed.

DE ~ A-2,907,818 (Plasser) describes a device for laying new rail on a surface prepared for the purpose.

The grinding blocks are laid in a direction which is opposite to the direction of movement of the vehicle, which means that the grinding blocks at the contact with the ground have approximately the speed I 0 relative to this. In addition, the ballast material is continuously applied to the substrate in connection with the laying of the sleeper blocks. A disadvantage of this known device is that it uses a digging device operating in the transverse direction of the groove which entails a great need for space in the transverse direction of the groove. This often means difficulties at work, for example when cramped places such as platforms and the like have to be passed.

Another type of device is described in US-A-4,160,418 (Theurer). This device has i.a. the disadvantage is that the sleeper blocks do not receive a sufficiently accurate control before they are laid, so the distance between the laid out sleeper blocks will vary.

An object of the invention is to provide an improved laying method and an improved device which obviates the disadvantages of previously known arrangements.

The invention relates to a method of the type specified in the preamble of the main claim, and that which is particularly characteristic of the invention is stated in the characterizing part of the claim.

The use of a plow device, which plows in the longitudinal direction of the track and which also cooperates with side screens, allows a significant reduction of the machine's space requirements laterally. This means a significant advantage in the work, especially since the passage of cramped places can take place without limiting the speed or efficiency of the work.

The S-shaped movement path of the grinding blocks during laying also allows an expedient discharge of the plowed ballast material between the grinding blocks moving in the web, at the same time the screen means ensuring that the ballast material is prevented from falling on the bed base before the grinding blocks are distributed. are intended to occupy rails. In a preferred embodiment, the grinder blocks are guided in the S-shaped path by means of two pairs of carriers provided with wheels, one pair of wheels over the other and rotating in opposite directions relative thereto, which wheels have or cooperate with holding and / or guide means for the sleeper blocks, wherein at least the lower pair of wheels is driven at a speed adapted to the speed of the rail vehicle. One pair of aids, which may be called transfer wheels, is in this case preferably above the other pair of wheels, which may be called paver wheels. . The rotational speed around the respective wheel center is adapted to each other in such a way that the slider blocks are continuously transferred from one pair of wheels to the other. The rotational speed of the laying wheels can be made directly proportional to the speed of the rail vehicle, but can also be made to vary in a predetermined manner in relation to this, namely if it is desired to vary the distance between the laid-out grinder blocks. The transfer and laying wheels must thus have a speed adapted to each other. The transfer and laying wheels can suitably cooperate with carriers and / or holding means, which are suitably distributed evenly along the periphery of the respective wheels and placed at a distance corresponding to the normal distance between the grinder blocks in the groove, ie. so that the rotational speed around the respective wheel centers is constant if the vehicle moves forward at a constant speed.

If smaller or larger distances are desired between the sleeper blocks, this can be achieved without the sleeper blocks sliding in relation to the bed base during the laying by increasing the rotational speed resp. is reduced during those moments of the rotational movement when no carrier or holding means is in contact with a sleeper block present on the bed base.

The sleeper blocks are preferably laid out guided in their longitudinal direction, e.g. by means of a member which engages in a recess for rail or rail bracket. They then assume a carefully predetermined position in the longitudinal direction in relation to the laying device of the rail vehicle. This is of particular importance for the placement of the rails on the sleeper blocks. Furthermore, according to a preferred embodiment, the laying device is displaceable laterally in relation to a longitudinal plane through the rail vehicle, the sleeper blocks can be laid without objection even in a curve. _. ___... ___...____..._._.._._, __ 8007198-8 _6 The bed base of the sleeper blocks is provided as mentioned by means of a plow device, which suitably occupies a fixed position in height relative to the laying device. ningen. The sleeper block and plow device are also adjustable in height and transverse relative to the rail vehicle as a unit. To ensure the correct level of the sleeper blocks, it is preferred that the plow device form a raised embankment below the portions of the sleeper blocks that support the rail.

In order to gain time and facilitate the work at the beginning and end of a replacement stage, it is preferred that the lower part of the plow device - and suitably also this associated side screens - be made detachable from the other parts of the plow device. Said lower parts can thereby remain in the track under the rails, as track change does not take place. Thereby, manual excavation and planning work can be eliminated. The support required by the rails between the last laid and the adjacent old sleeper block can easily be applied to the planned bed base between the side screens.

The invention also relates to a rail vehicle for replacing sleeper blocks and laying new rails on these, which rail vehicle essential characteristics are stated in the patent claims.

An embodiment of the invention will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic side view of a rail vehicle included in a train set for replacing sleeper blocks and laying new rails in accordance with the method according to the invention.

Fig. 2 is a side view of the laying device of the rail vehicle and an existing transport device for plowed ballast material in connection with this.

Fig. 3 is an end view of the device according to Fig. 2.

Fig. 4 is a side view which in principle illustrates the drive of the laying device.

Fig. 5, finally, is an end view of the drive devices of Fig. 4.

Referring to Fig. 1, the number 1 denotes old rails resting on old sleeper blocks 3, which are to be replaced __ _ .. ..-___..__: í ______.__ soo719s-8 7 by new rails 2 on new sleeper blocks 4. The old ones the grinding blocks 3 can, for example, consist of wood, while the new ones can consist of concrete grinding blocks. Furthermore, the old rails 1 can have customary rail joints, while the new rails 2 can be welded together without joints into sections of considerable length, for example of the order of 360 m. To achieve this, a rail vehicle 30 is used, the front wheels 30a of which run on the old track 1, while its rear wheels 30b run on the new track 2.

The rail vehicle further has a ploughshare 31 with forward-facing forks (not shown) for hoisting the old ballast blocks 3 and between them existing ballast material 40. Furthermore, there is a transport device for disposing of and transporting the old sleeper blocks 3 to a carriage in that train set, in which includes the rail vehicle 30. The process is indicated schematically in Fig. 1.

The rail vehicle 3d further has a transfer wheel 42, which receives new sleeper blocks 4 fed on an feed conveyor 9 and transfers these to a paver wheel 46. The sleeper blocks are thereby caused to pass an S-shaped path and are laid out on the bed base provided by the plow insert 31, so that the siiper blocks 4 in the installation moment, i.e. when they are brought into contact with said bed base 41, the speed has essentially 0 in relation thereto.

In connection with the laying, the ballast material plowed up by the plow insert 31 is caused to fall between the grinder blocks 4 in connection with their laying via a conveyor 55 indicated in Fig. 1.

Along the sides of the carriages 8 included in the train set, tracks 6 run for a gantry crane 7, which transports the new sleeper blocks 4 from the railway carriages 8 to an feed conveyor 9 present on the paving carriage 30.

The gantry crane 7 is also used to move occupied sleeper blocks 3 from a collecting table 10, which is located on a railway carriage 8, .__, _... í: .ï ..____ .. _ _ ._.___ connected to the paver carriage 30. __..._..__., _ _ .._....__. s. ~ .w. ~ .._......_._.... 3007198-s to someone_of earlier on new sleeper blocks 4 emptied railway carriages 8.

Referring to Figs. 2 and 3, the new sleeper blocks 4 are fed via the feed conveyor 9 to a transfer wheel 42, which transfer wheel rotates at a speed which is adapted to the speed of the paver truck 30. The transfer wheel 42 is arranged to be able to receive and retain the sleeper blocks 4- during a part of a rotation, in order to then transfer the sleeper blocks to an underlying paver wheel, which then in turn delivers the sleeper blocks to the bed base 41 in the rearward direction from the rail vehicle. The speed of the paver wheel is then so adapted in relation to the speed of the rail vehicle 30 that the sleeper blocks on contact with the bed base 41 have approximately the speed 0 in relation to this. In order to hold the sleeper blocks 4 at the transfer wheel 42, this has pivotally engaging pivotable holding arms 45 provided at the ends of the sleeper blocks provided with centrally located engaging means 45a arranged to engage against the upper side of the sleeper blocks. The holding arms 45 are further provided at the ends with rollers 45b, which upon rotation of the wheel engage against a semicircular frame-fixed guide 47, the engaging means 45a being pressed against the grinding blocks, so that they are retained during the rotation of the transfer wheel during half a turn. the transfer wheel 42 then delivers the grinder blocks to the paver wheel 46, which runs with a certain phase shift relative to the transfer wheel and has a number of projecting carriers 46a, which co-operate with pivotable push arms 49, the outer ends of which are arranged to engage the grinder blocks 46. , so that the sleeper blocks are retained during the rotation of the paver wheel half a turn. An external semicircular guide rail 50 also contributes to the retention of the sleeper blocks.

The inner ends 49a of the pivotable push arms 49 are formed as cam followers adapted to cooperate with a relatively fixed cam guide 488 of the machine frame. When the grinder block is held at the pawl wheel 46 accompanied by this in rotation half a turn, the cam guide 48 brings the push arms 48 to swing outwards, whereby the sleeper blocks are delivered to the bed base 41 substantially at the speed 0 in relation thereto.

Adjacent to the paver device consisting of the transfer wheel 42 and the paver wheel 46 is the plow cutter 31 and a conveyor belt 55 for ballast material 40 arranged next to it, which is plowed up by means of the plow cutter 31.

The conveyor belt 55 runs over end rollers 56 and 57, the shaft 57a of the end roll 57 being located in the area of the shaft 42b of the transfer wheel 42, but without the two shafts 57a and 42b having to coincide. The ballast material conveyed by the conveyor belt 55 is discharged from the upper end of the conveyor device, so that they fall between the grinder blocks 3. To prevent the ballast material from falling onto the bed planned by the plow insert 31 in front of grinder blocks which have not yet been laid out, there is a screen 58, which further irons of ballast material accumulated on passing sleeper blocks. The screen 58 can suitably be formed of rubber and provided with toothing. Screens (not shown) are also placed over the parts of the sleeper blocks 3 which are later to receive rails.

In the embodiment shown, the transfer wheel 42 has four holding arms 45 and the paver wheel 46 four push arms 49. Other numbers are also conceivable, whereby the diameter and speed of each wheel may be adapted thereto.

By either increasing or decreasing the rotational speed of the wheels during the part of the turn when no sleeper block is being laid out, the mutual distance of the laid out sleeper blocks can be varied.

From Fig. 3 it can be seen that the transfer wheel 42, the discharge wheel 46 and the end rollers 56 and 57 of the conveyor belt 55 are mounted in a machine frame which comprises vertical soo719s-e 10 plates 60. These plates 60 serve at the same time as shields which ensure that existing ballast material 40 outside the raised bed 41 does not fall on the bed before the new sleeper blocks 4 have been laid out. The entire machine frame comprising the plates 60 is displaceable in the transverse direction of the rail vehicle, whereby grinding is curved. The machine frame is furthermore movable in the vertical direction by means of means not shown, whereby the paver device can be moved to an inoperative position, for example in connection with the rail vehicle driving from or to the relevant workplace.

The operation of the paving device is illustrated in principle in Figures 4 and 5.

It is essential, as previously mentioned, that the paver wheel 46 be driven at a speed which is so adapted to the speed of the rail vehicle 30 that the sleeper blocks have a horizontal speed during the laying which is practically zero relative to the baauna surface.

In the embodiment shown in Figs. 4 and 5, the paver wheel is driven from a stepper motor 61 via two chain transmissions, the chains of which are designated 52 and 63 and which run over the end wheels 64 and 65, respectively. 66, 67. The speed of the stepper motor 61 is suitably controlled by a sensor coupled to a wheel rolling on the track.

The wheel 65 is rotationally fixed with a shaft 70, which at each end carries sprockets 71 over which a chain 72 runs, which via sprocket 73 drives the transfer wheels 42.

Said chain 72 also runs over two sprockets 74 and 75.

In Fig. 4 it is further indicated that the lower part of the plow insert Ål is detachable from the other part of the plow insert. This part of the ploughshare can thus be left in the ground in connection with the rail vehicle leaving the workplace at the end of a work shift. ll In order to accurately steer the sleeper blocks laterally in connection with the laying, the paver wheels 46, as shown in Fig. 3, engage against the inner edges 4a to recesses for rails or rail brackets in the upper side of the sleeper blocks. The position of the sleeper on the bed base '41 is thereby precisely defined, which facilitates the subsequent laying and anchoring of the rails. The unit consisting of the plow device 31, the transport device 55, the paver device 42, 46 and the side screens 60 can be adjusted in height and laterally on the rail vehicle 30 by means of means not shown.

The length of the rail vehicle can amount to 35 to 40 m.

A laying rate of about 10 sleeper blocks per minute does not constitute an impossibility in the application of the invention.

After the sleeper blocks have been laid out, new railway rails are lowered in a more or less conventional manner onto the laid out sleeper blocks and applied to them. This laying of railway rails also takes place in a substantially continuous operation, whereby fully welded lengths of, for example, 360 m are applied to the grinder blocks.

Claims (11)

8007198-8 12- Patent claims A method of replacing, in a substantially continuous operation, sleeper blocks and rails to a railway track using a rail vehicle (30) with front wheels (30a) rolling on the original track (1) and rear wheels (30b) rolling on it. newly laid groove (2), the original rails being moved to the side after the passage of the front wheels, sleeper blocks (3) and ballast material (40) being plowed up by means of a plow device (31) for creating a substantially flat bed base (41), on which new sleeper blocks (4) are laid to form the basis for new rails (2), which are applied and anchored to the sleeper blocks (4), which new sleeper blocks (4) are laid out while performing a rearward movement relative to the rail vehicle (30). direction, so that the sleeper blocks at the contact with the substrate (41) have approximately the speed 0 relative to this, and ballast material (40) is continuously applied to the substrate in connection with the laying of the sleeper blocks, characterized in that the sleeper blocks (4) before laying the ballast material (40) is fed between the grinder blocks during their passage of the web via a transport device (55) fed by the plow device (31), that the ballast material (40) is prevented by means of screen means (58) from fall on the bed base (41) before laying the sleeper blocks (4), and on the parts of the sleeper blocks which are intended to receive rails, and that the plow device (31) cooperates with side screens (60) which prevent unploughed ballast material from falling on the plowed the bed (41) for the new sleeper blocks (4). ' Method according to claim 1, characterized in that the new sleeper blocks (4) are moved in the S-shaped path by means of two pairs of carrier wheels (42 and 46, respectively), one pair over the other and rotating 8007198 ~ 8 134 in the opposite direction relative thereto, which wheels have or cooperate with holding and / or guide means (45, 43; 49, 50) for the grinding blocks, wherein at least the lower pair of wheels (46) is driven by one after the rail vehicle ( 30) speed adapted speed. 3. A method according to claim 1 or 2, characterized in that the sleeper blocks are laid out guided in their lumbar direction, e.g. by means of a member which engages in a recess for rail or rail bracket. 4. A method according to any one of claims 1-3, characterized in that the plow device is caused to form an embankment (4la) under the parts of the grinding blocks (4), the upper side of which is to support rails. 5. A method according to any one of claims 1-4, characterized in that the plow device (31) is made divisible, so that its upper part can leave the workplace together with the rail vehicle while its lower part is left in the ground. in Rail vehicles for changing sleeper blocks and laying new rails on them comprising a) front wheels (30a) intended to roll on original rails (1), lb) rear wheels (30b) intended to roll on new sleeper blocks (4 laid new rails, c) a plow device (31) for removing old sleeper blocks (3) and ballast material (40) while preparing a bed base (41) for new sleeper blocks (4), d) transport and laying means (9; 42 46) for new sleeper blocks, e) means for removing rails from old and applying rails to newly laid sleeper blocks, f) a paver device (46) arranged to lay out the new sleeper blocks (4) while performing movement, which is opposite the direction of movement of the rail vehicle (30), so that the grinding blocks at the contact with the ground have approximately the speed 0 relative thereto, g) of the plow device (31) fed transport and discharge means (55) for ballast material (40) arranged to deliver the ballast material between the sleeper blocks (4) in connection with their laying, characterized in that the paver means comprise a pair of paver wheels (46) engaging the sleeper blocks arranged to co-operate with pivotable push arms (49) for the sleeper blocks (4) to temporarily retain them and by pivoting to a release position deliver the sleeper blocks to the bed bottom - the team (41), - that the pair of paver wheels (46) are located under an oppositely rotatable pair of transfer wheels (42), which from a transport device (9) present on the rail vehicle receive the grinder blocks (4) and transfer them to the paver wheels. (46), so that the sleeper blocks in connection with the laying describe an S-shaped path, and that the plow device at the ends has parallel side shields (60) with the groove, which prevent the plow device from falling substantially unaffected ballet material onto the formed bed base. Rail vehicle according to claim 6, characterized in that the paver wheels (46) are driven synchronously with a wheel mounted in the rail vehicle, rolling on the track, e.g. via a worm gear and a stepper motor (61), the speed of which is controlled by a sensor connected to said wheels. Rail vehicle according to claim 6 or -7, characterized in that the plow device (31) has a shape which forms a pleasure (4la) of the bed base at the portions of the sleeper blocks (4) which will be loaded by rails. 9. A rail vehicle according to claim 8, characterized in that the plow device comprises an upper and a lower, with an upper releasably connected part, which lower part can be detached and left in the substrate for later reunification with the upper part. Rail vehicles according to any one of claims 7-9, characterized in that the paving device (42, 46), the transport device (55) for ballast material and the plow device (31) are laterally and preferably also vertically adjustable burn on the vehicle. 11. ll. Rail vehicles according to any one of claims 6-10, characterized in that said side guards (60) consist of the machine frame of the paving device.