Double track laying and collecting vehicle and double track laying and collecting method

Abstract

The present application relates to the technical fields of track laying and collecting car, and discloses a double-line track laying and collecting car and a double-line track laying and collecting method, which comprises a track laying and collecting train formed by a plurality of car plates connected in series and pulled by a rail car, guide rails are arranged on both sides of the car plates, a jacking device is arranged on the guide rails, a towing car is further arranged on the car plates, and the towing car is connected with the jacking device through a towing rope; a track hanger is arranged on the support and can move transversely along the support, and a hanger driving device for driving the track hanger is installed on the support, wherein the beneficial effects of the present application compared with the prior art are that the jacking device and the towing car adopt a movable structure matched with the guide rails and the towing rope, guide rails are arranged on both sides of each car plate along the length direction and the end portions of the guide rails of adjacent car plates are aligned, the towing car pulls the jacking device to move longitudinally along the guide rails through the guide pulley, when the old rails of one car plate are full, the towing car pulls the jacking device to move to the previous car plate through the gap between the guide rails of adjacent car plates, and the continuous replacement construction requirement of the adaptive line is met.

Description

Technical Field

[0001] This invention relates to the field of track laying and rail retrieval vehicle technology, specifically to a double-track track laying and rail retrieval vehicle and a double-track track laying and rail retrieval method. Background Technology

[0002] The replacement of old rails with new ones is a core procedure in railway maintenance and upgrading. It requires the simultaneous completion of two operations within a limited maintenance window: old rail recovery and new rail laying. Construction efficiency directly determines whether the line can open on schedule. Currently, the replacement of existing rails generally employs a combination of manual labor and gantry cranes or rail cranes. Old rail recovery and new rail laying are carried out sequentially, each process taking a long time. Furthermore, the transfer of equipment between multiple material cars relies on additional hoisting assistance, resulting in low overall construction efficiency and making it difficult to meet the rapid replacement requirements of long and trunk lines.

[0003] The most common method for existing track replacement construction is to use a gantry crane in conjunction with manual replacement. A gantry crane or a rail crane is temporarily set up in the construction section. The old rail fasteners are first disassembled manually, and the gantry crane lifts the old rails one by one and transfers them to the material car. Then, the gantry crane lifts the new rails from the material car, aligns them, and lowers them onto the sleepers before they are manually tightened.

[0004] In terms of material transportation and equipment layout, current construction methods often use multiple flatbed trucks to carry new rails and recycled old rails separately, but there is no continuous transfer channel between the trucks. When a truck carrying old rails is full, additional hoisting equipment is needed to move lifting equipment, jacking and other work units from one truck to another. The transfer process is cumbersome, time-consuming, and there are safety risks associated with high-altitude hoisting operations. Some track replacement methods fix the equipment to a single car, limiting the working range. The work position can only be adjusted by moving the entire train, and after lifting, the position can only be adjusted slightly within a fixed range, making large-scale continuous movement in the lateral direction impossible. When recovering old rails, they must first be lifted off the track, and then transferred to the carrier car by longitudinal train movement or manual pushing, resulting in a loose workflow. Similarly, laying new rails requires multiple adjustments to the lifting equipment to complete the alignment and lowering. Old rail recovery and new rail laying cannot be completed continuously in the same lateral movement, leading to a disorganized work rhythm and a significant amount of time wasted on lifting equipment repositioning and adjustments. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above-mentioned difficulties and provide a double-track track laying and take-up vehicle and a double-track track laying and take-up method.

[0006] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: A double-track laying and rail-retrieval vehicle includes a track-laying and rail-retrieval train consisting of multiple flatbed cars connected in series and pulled by a track car. Both the track car and the flatbed cars include a car platform. Guide rails are laid on both sides of the car platform along the length direction. A lifting device that can move along the guide rails is provided on the guide rails. A traction car that can move along the guide rails is also provided on the car platform. The traction car is connected to the lifting device by a traction rope. The lifting device is fixed with a support member for supporting the track hanger. The track hanger straddles the support member and can move laterally along the support member. A hanger drive device for driving the track hanger is installed on the support member.

[0007] As an improvement, during track laying and retrieval operations, the rear flatbed is empty and used to carry the old tracks to be recovered, while the remaining flatbeds are stacked with new tracks to be laid. The guide rail ends of adjacent flatbeds are aligned and there is a gap between them, and the lifting device and the tractor move between the flatbeds.

[0008] As an improvement, the lifting device includes a movable support and a movable auxiliary component that are rolled together with the guide rail by a movable wheel. A base is fixedly connected to both the movable support and the movable auxiliary component. A hydraulic rod is provided on the base. The support is fixedly inserted into the top of the hydraulic rod. A connecting ring is fixed to the side of the base at the end. The traction rope of the tractor is hooked onto the connecting ring, thereby pulling the lifting device to move along the guide rail.

[0009] As an improvement, the tractor includes a car body with rollers that cooperate with the guide rails. The two ends of the guide rails on the railcar and the tail ends of the guide rails on several flatbed cars are provided with limiting holes. The limiting holes on the car body and the limiting rods are inserted through them. The car body is fixed with a bracket and a handle. A guide pulley is installed on the top of the bracket. A guide cylinder is fixed to the side of the car body through a support plate. After the traction rope passes around the guide pulley, one end is connected to the lifting device, and the other end is controlled by the retraction mechanism inside the car body.

[0010] As an improvement, the track hanger includes a frame, with hanger side rods on both sides of the frame, and a guide rail at the bottom of the hanger side rods. The support includes a C-shaped bracket fixed to a hydraulic rod, with a groove fixed inside the bracket. An auxiliary wheel that rolls with the guide rail to support the movement of the track hanger is installed inside the groove.

[0011] As an improvement, the track hanger includes a transverse beam located at the center of the frame, a toothed plate on the upper end of the side rod of the hanger, a side plate vertically fixed on the outer side of the bracket, and support plates and brackets on both sides of the side plate. The hanger drive device includes a drive reduction gearbox located on the bracket, and the output shaft of the drive reduction gearbox is equipped with a drive gear that meshes with the toothed plate to drive the entire track hanger to move laterally along the support. A pulley block is installed at the bottom of the transverse beam, and the rail clamping mechanism is suspended below the pulley block, which can clamp and lift the rail.

[0012] A method for laying and securing double-track rails includes the following steps: Step 1: The railcar pulls multiple flatcars to form a rail-laying and rail-collecting train. The last flatcar is empty, and new rails are placed on the remaining flatcars and railcars. The lifting device is initially placed on the last flatcar. Step 2: The rail clamping mechanism of the rail hanger clamps the old rail on the ground, lifts it by pulley block, moves it laterally to the top of the empty flatbed car at the rear and lowers it. Then the rail clamping mechanism clamps the new rail on the adjacent flatbed car, lifts it, moves it laterally to the original position of the old rail and lowers it to complete the laying. Step 3: After the old rails of the tail cart are fully loaded, start the traction car on the railcar and use the traction rope to pull the lifting device along the guide rail to move to the second to last section of the flatcar. Then pull out the limit rod of the tail traction car, start the tail traction car to move along the guide rail to the second to last section of the flatcar, and after it is in place, insert the limit rod into the limit hole to lock it. The second-to-last flatbed cart was replaced with an empty one, and the old track was recycled and the new track was laid section by section.

[0013] As an improvement, in step two, the old track recycling and the new track laying are completed sequentially within the same track gantry stroke, and the tractor is locked while the track gantry is in operation.

[0014] As an improvement, in step three, the hydraulic rod is in the extended state before the lifting device is transferred; when the tractor is transferred, the locking of the limit rod must be released first, and after it is moved into place, the limit rod is inserted into the corresponding limit hole to complete the positioning, so as to ensure that the vehicle body does not slip during subsequent traction operations.

[0015] The advantages of this invention compared to the prior art are as follows: 1. The lifting device and tractor adopt a movable structure with guide rails and traction ropes. Guide rails are laid on both sides of each car section along the length direction, and the ends of the guide rails of adjacent car sections are aligned. The lifting device is mounted on the guide rails through the bottom moving wheels. After the tractor changes direction through the guide pulley, it pulls the lifting device to move longitudinally along the guide rail. The tractor moves along the guide rail and, after reaching the position, inserts the limit rod into the limit hole on the guide rail to lock it. When the old rails of a car section are full, the tractor pulls the lifting device to transfer it to the previous car section through the gap of the guide rails of the adjacent car section. The transfer is quick and perfectly adapts to the continuous replacement construction needs of long-distance lines advancing section by section.

[0016] 2. The track gantry of the present invention adopts a lifting structure consisting of a transverse beam, a pulley block, and a rail clamping mechanism. The drive gearbox of the gantry drive device drives the drive gear to rotate. Through the meshing transmission with the toothed plate on the upper end of the side rod of the gantry, the entire track gantry is driven to move laterally along the two side supports. When retrieving the old rail, the rail clamping mechanism descends to clamp the old rail, lifts it, and then moves it laterally to the top of the empty flatbed car at the rear before lowering it. Subsequently, the track gantry continues to move laterally to the new rail stacking position to clamp the new rail, and then moves laterally in the opposite direction to the original old rail line position to lower it and complete the laying. The old rail retrieval and the new rail laying are completed sequentially and continuously within the same gantry lateral movement stroke. The operation process is compact, which greatly reduces the track replacement time and significantly improves the construction efficiency during the maintenance window.

[0017] 3. The tractor adopts a locking structure with a limit rod and a guide rail limit hole. During the operation of the rail gantry, the tractor is always locked. The limit rod passes through both the vehicle body and the guide rail limit hole, completely fixing the vehicle body to the guide rail. This ensures that the tractor will not slip during the traction operation and provides a stable traction anchor point for the lifting device. The cooperation structure between the guide rail and the limit hole is simple and reliable, with precise locking and positioning, and no risk of slippage during the operation. Attached Figure Description

[0018] Figure 1 This is a front view of the train structure of the double-track laying and rail-collecting vehicle of the present invention.

[0019] Figure 2 This is a schematic diagram of the overall structure of the double-track laying and rail-collecting vehicle of the present invention.

[0020] Figure 3 This is a schematic diagram showing the overall structure of the double-track laying and rail-collecting vehicle of the present invention.

[0021] Figure 4 This is a partial structural breakdown diagram of the double-track laying and rail-collecting vehicle of the present invention.

[0022] Figure 5 This is a schematic diagram of the lifting device structure of the double-track laying and rail-collecting vehicle of the present invention.

[0023] Figure 6 This is a schematic diagram of the tractor structure of the double-track laying and rail-retrieval vehicle of the present invention.

[0024] Figure 7 This is a schematic diagram of the support structure of the double-track laying and rail-retrieval vehicle of the present invention.

[0025] Figure 8 This invention relates to a double-track laying and rail-retrieval vehicle. Figure 3 Schematic diagram of the structure at point A in the middle.

[0026] Figure 9 This invention relates to a double-track laying and rail-retrieval vehicle. Figure 4 Schematic diagram of the structure at point B.

[0027] As shown in the figure: 1. Track laying and rail collection train; 101. Railcar; 102. Flatbed car; 2. Guide rail; 201. Limiting hole; 3. Lifting device; 301. Moving support; 302. Moving auxiliary component; 303. Base; 305. Hydraulic rod; 306. Connecting ring; 4. Traction vehicle; 401. Car body; 402. Roller; 403. Limiting rod; 404. Bracket; 405. Guide pulley; 406. Support plate one; 407. Guide cylinder ; 408, Handle; 409, Traction Rope; 5, Support Component; 501, Bracket; 504, Groove Component; 505, Auxiliary Wheel; 506, Side Plate; 507, Support Plate II; 508, Support Plate; 6, Hanger Drive Device; 601, Drive Gearbox; 602, Drive Gear; 7, Rail Hanger; 701, Transverse Beam; 702, Pulley Block; 703, Rail Clamping Mechanism; 704, Hanger Side Rod; 705, Tooth Plate; 706, Guide Rail. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] This double-track track-laying and rail-collecting vehicle addresses the challenges of low efficiency in old rail collection and new rail laying during existing railway line replacement construction, inconvenient equipment transfer between multiple wagons, and long time commitment for single-process operations. Equipped with a lifting device and traction vehicle, it can freely transfer between multiple connected wagons. Combined with a laterally movable track gantry, it can sequentially complete the two processes of old rail collection and new rail laying within the same gantry stroke, without the need for additional lifting equipment. The new and old rails described in this invention include the rail itself and the rail panel composed of the rail and the bottom sleepers. The following description uses the rail itself as an example.

[0030] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 6 As shown: The main body of this invention is a track-laying and track-collecting train 1, which is composed of a track car 101 pulling multiple flatbed cars 102 in series. Both the track car 101 and the flatbed cars 102 are equipped with car flats. Guide rails 2 are laid on both sides of the upper surface of each car flat along the length direction. Several limiting holes 201 are opened on the guide rails 2. The guide rails 2 on the track car 101 are provided with limiting holes 201 at both ends. The guide rails 2 on the several flatbed cars 102 are also provided with limiting holes 201 at their tail ends. The ends of the guide rails 2 of adjacent flatbed cars 102 are aligned with each other and a gap is left between them, so that the lifting device 3 and the traction car 4 can move and pass between the flatbed cars 102.

[0031] The railcar 101 serves as the power traction unit for the entire train, pulling multiple flatcars 102 along the existing railway line to the construction section. Before construction, the last flatcar 102 is emptied to serve as a carrier for the old rails. The remaining flatcars 102 and the railcar 101 are stacked with the new rails to be laid. The guide rails 2 on all the flatcars are continuously aligned along the length of the train to form a continuous running track for the lifting device 3 and the traction vehicle 4 to move. The limiting hole 201 on the guide rail 2 is used to cooperate with the limiting rod 403 of the tractor 4 to lock the vehicle body 401, ensuring that the tractor 4 will not slip during traction operations. The gap between the guide rails 2 of adjacent flatbed 102 is just enough to meet the relative displacement requirements when the vehicle is traveling, and at the same time, it will not hinder the cross-section transfer of the lifting device 3 and the tractor 4. The lifting device 3 and the tractor 4 can travel along the guide rail 2 from one flatbed 102 to another adjacent flatbed 102, realizing the section-by-section adjustment of the working position. No additional hoisting equipment is needed to transport the working unit, which is suitable for the continuous replacement construction requirements of long-distance lines.

[0032] The guide rail 2 provides a continuous moving guide track for the lifting device 3 and the tractor 4, while the limiting hole 201 locks the tractor 4 in its working position, ensuring the stability of the operation. The train structure with multiple flatbed carts 102 connected in series can carry a large number of new tracks at once, reducing the frequency of material transportation during construction and improving the continuity of long-distance construction. The cooperation structure between the guide rail 2 and the limiting hole 201 is simple and reliable, with precise locking and positioning, no risk of slippage during operation, and high construction safety.

[0033] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 As shown: The lifting device 3 includes a movable support 301 and a movable auxiliary 302. Both the movable support 301 and the movable auxiliary 302 are in rolling contact with the guide rail 2 through movable wheels at the bottom. The tops of the movable support 301 and the movable auxiliary 302 are fixedly connected to bases 303 that are connected to each other by bolts. Hydraulic rods 305 are installed on the bases 303 at both ends. Support members 5 are fixedly inserted into the tops of the hydraulic rods 305. A connecting ring 306 is fixed to the side of the base 303 at the end. The traction rope 409 of the tractor 4 can be hooked onto the connecting ring 306 to pull the entire lifting device 3 along the guide rail 2.

[0034] The lifting device 3 is mounted on the guide rails 2 on both sides via the movable support 301 and the movable auxiliary 302 at the bottom of the movable wheels. It can move freely along the longitudinal direction of the guide rails 2. The movable support 301 and the movable auxiliary 302 jointly bear the weight of the top support 5 and the track hanger 7, ensuring the stability of the movement process. The hydraulic rod 305 on the base 303 can extend and retract synchronously, driving the top support 5 and the track hanger 7 to rise and fall as a whole. When lifting the track, the hydraulic rod 305 extends to raise the height of the track, making it easier to move laterally to cross obstacles. The connecting ring 306 on the end base 303 is used to attach the traction rope 409 of the tractor 4. The tractor 4 can pull the entire lifting device 3 along the guide rail 2 by raising and lowering the traction rope 409. It does not need to be equipped with its own drive power, making the structure simpler and more reliable. When it is necessary to transfer between sections, the tractor 4 pulls the lifting device 3 along the guide rail 2 and can transfer it to the previous section of the flatbed 102 through the gap of the guide rail 2 between adjacent flatbed 102, thus completing the section-by-section advancement of the working position.

[0035] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 6 As shown: The tractor 4 includes a vehicle body 401. Rollers 402 that cooperate with guide rails 2 are installed at the bottom of the vehicle body 401. A limiting rod 403 is inserted through the vehicle body 401. The limiting rod 403 can be inserted into the limiting hole 201 on the guide rail 2 to lock the vehicle body 401. A bracket 404 and a handle 408 are fixed on the top of the vehicle body 401. A guide pulley 405 is installed on the top of the bracket 404. A guide cylinder 407 is fixed on the side of the vehicle body 401 through a support plate 406. The traction rope 409 passes around the guide pulley 405 and one end is connected to the connecting ring 306 of the lifting device 3. The other end is controlled by the retraction mechanism inside the vehicle body 401.

[0036] The tractor 4 is mounted on the guide rail 2 via the bottom rollers 402 and can move longitudinally along the guide rail 2. The winding and unwinding mechanism inside the vehicle body 401 can wind up and unwind the traction rope 409. After the traction rope 409 changes direction by passing around the guide pulley 405 at the top of the bracket 404, its end is hooked on the connecting ring 306 of the lifting device 3. When the winding and unwinding mechanism winds up the traction rope 409, it can pull the lifting device 3 to move along the guide rail 2 toward the tractor 4. When the rope is unwinding, the lifting device 3 can move in the opposite direction. The guide cylinder 407 guides and limits the traction rope 409 to prevent the traction rope 409 from shaking and falling out of the groove. After the tractor 4 moves to the working position, the limiting rod 403 is inserted downward into the corresponding limiting hole 201 on the vehicle body 401 and the guide rail 2, so that the vehicle body 401 can be completely locked on the guide rail 2, ensuring that the tractor 4 will not slip during the traction operation, and providing a stable traction anchor point for the lifting device 3. When it is necessary to move the tractor 4 to a different position, first pull out the limit rod 403 to release the lock. The operator can then push the vehicle body 401 along the guide rail 2 using the handle 408. After moving across sections to the previous section of the flatbed 102, the limit rod 403 is then inserted into the corresponding limit hole 201 to relock. The entire transfer process is simple and quick, and is suitable for the construction rhythm of advancing section by section.

[0037] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 5 Appendix Figure 7 Appendix Figure 8 Appendix Figure 9 As shown: The support member 5 includes a bracket 501 fixed to the top of the hydraulic rod 305. The bracket 501 has an overall C-shaped structure. A groove 504 is fixed inside the bracket 501. An auxiliary wheel 505 is installed in the groove 504. A side plate 506 is vertically fixed to the outside of the bracket 501. A support plate 507 and a support plate 508 are respectively provided on both sides of the side plate 506. The support plate 508 is used to support the hanger drive device 6. The guide rail 706 of the track hanger 7 can roll along the auxiliary wheel 505 to achieve lateral movement.

[0038] The C-shaped bracket 501 is fixed to the top of the hydraulic rod 305 and rises and falls synchronously with the hydraulic rod 305. The two brackets 501 are located on both sides of the track hanger 7 and jointly support the weight of the track hanger 7. The auxiliary wheel 505 in the groove 504 inside the bracket 501 forms a rolling engagement with the guide rail 706 at the bottom of the track hanger 7, which converts the sliding friction between the track hanger 7 and the support 5 into rolling friction, greatly reducing the resistance to lateral movement and making the lateral movement of the track hanger 7 smoother. At the same time, the auxiliary wheel 505 plays a lateral guiding role to ensure that the track hanger 7 does not deviate during lateral movement. The side plate 506 on the outer side of the bracket 501, together with the second support plate 507 and the support plate 508, constitute the mounting carrier of the hanger drive device 6. The output gear of the drive device passes through the side plate 506 and meshes with the toothed plate 705 on the track hanger 7, providing power for the lateral movement of the track hanger 7. The support plate 508 supports the weight of the drive reduction gearbox 601, and the second support plate 507 strengthens the structural strength of the side plate 506 to ensure structural stability and no deformation during the drive engagement process.

[0039] The drive reduction gearbox 601 is powered by a motor. After reducing speed and increasing torque, it drives the drive gear 602 to rotate, thereby driving the entire track hanger 7 to move laterally along the support member 5. The drive reduction gearbox 601 has a reverse self-locking characteristic, which can automatically lock the position of the track hanger 7 when the drive stops, preventing it from slipping due to the weight of the track or external forces, thus ensuring the accuracy of the lifting and lowering positions. The left and right lateral movement of the track hanger 7 can be achieved by controlling the forward and reverse rotation of the motor.

[0040] Combined with appendix Figure 1 Appendix Figure 3 Appendix Figure 7 Appendix Figure 8 Appendix Figure 9 As shown: The track hanger 7 includes a transverse beam 701 located at the center of the frame. A pulley block 702 is installed at the bottom of the transverse beam 701. A rail clamping mechanism 703 is suspended below the pulley block 702 and can clamp and lift the rail. Hanger side rods 704 are provided on both sides of the frame. A guide rail 706 is provided at the bottom of the hanger side rod 704. A toothed plate 705 is provided on the upper end face of the hanger side rod 704. The guide rail 706 rolls with the auxiliary wheel 505 of the support member 5. The toothed plate 705 meshes with the drive gear 602 for transmission.

[0041] The track hanger 7 is mounted on the support members 5 at both ends. The guide rails 706 at the bottom of the side rods 704 of the two side hangers are mounted on the auxiliary wheels 505 and can move laterally along the support members 5. The pulley block 702 below the central transverse beam 701 can drive the rail clamping mechanism 703 to rise and fall. The rail clamping mechanism 703 can automatically clamp the rail web position and clamp firmly without falling off. When recycling old rails, the rail gantry 7 moves laterally to above the old rails on the ground, the rail clamping mechanism 703 descends to clamp the old rails, and lifts them off the ground through the pulley block 702. Then the gantry drive device 6 drives the rail gantry 7 to move laterally to above the empty tail car 102, the rail clamping mechanism 703 descends to stack the old rails on the car 102, and the recycling of old rails is completed. Subsequently, the track gantry 7 continues to move laterally above the flatbed trolley 102 where the new rails are stacked. The rail clamping mechanism 703 clamps the new rails and lifts them up. The track gantry moves laterally in the opposite direction to the original position of the old rails and lowers the new rails to complete the laying. The old rail recycling and the new rail laying are completed sequentially within the same lateral movement of the track gantry 7. No additional auxiliary equipment is required, and the operation process is compact and efficient.

[0042] Specific Implementation Example: For example, when upgrading and replacing tracks on a 12-kilometer-long existing railway mainline, traditional construction methods involve manual labor combined with gantry cranes. At most, 300 meters of track can be completed per night, resulting in extremely low efficiency and frequent delays due to unfinished work during maintenance windows. To address these issues, the specific implementation steps of this invention are as follows: 1. Construction preparation and train formation: Before construction, railcar 101 pulls 8 flatcars 102 to form rail laying and rail collection train 1. The last flatcar 102 is emptied and used as a carrier for the old rails. The remaining 7 flatcars 102 and railcar 101 are stacked with the new rails to be laid. Each flatcar 102 can carry 10 new rails of 25 meters in length. The whole train can carry 70 new rails, which can meet the replacement requirements of 1,500 meters of line in a single night. The lifting device 3 and the tractor 4 are initially placed on the empty flatbed 102 at the rear. The limit rod 403 is inserted to lock the position of the tractor 4. The hydraulic rod 305, pulley block 702 and rail clamping mechanism 703 are checked to ensure that they are all operating normally and that the rail hanger 7 moves smoothly without jamming.

[0043] 2. Old rail recycling and new rail laying: After the train travels to the construction section, it stops and brakes. The gantry drive device 6 is started to drive the track gantry 7 to move laterally to above the old rail on the ground. The pulley block 702 drives the rail clamping mechanism 703 to descend, clamp the old rail and lift it away from the sleeper surface. Then the track gantry 7 moves laterally to above the empty flatbed car 102 at the rear and stacks the old rail steadily on the flatbed car 102. The track gantry 7 continues to move laterally to the new rail stacking position of the adjacent flatbed trolley 102. The rail clamping mechanism 703 clamps a new rail and lifts it up. It moves laterally in the opposite direction to the original old rail line position. After precise alignment, the new rail is lowered onto the sleeper, completing the replacement of a single rail. The whole process takes only 8 minutes. The old rail recycling and the new rail laying are completed within the same gantry lateral movement.

[0044] 3. Transfer of work units section by section: After the old rails of the tail flatbed 102 are full, start the traction car 4 on the railcar 101 to wind up the traction rope 409, pull the lifting device 3 to move forward along the guide rail 2, and transfer it to the penultimate flatbed 102 through the gap of the guide rail 2 between adjacent flatbed 102. Then, the limit rod 403 of the rear tractor 4 is pulled out. The operator pushes the tractor 4 along the guide rail 2 to the second-to-last flatbed 102 by the handle 408. After it is in place, the limit rod 403 is inserted into the corresponding limit hole 201 to lock it again. At this time, the original second-to-last flatbed 102 becomes a new empty car and the old rail recycling and new rail laying operations continue. The entire transfer process only takes 5 minutes and does not require hoisting equipment to transport the work unit.

[0045] 4. Continuous construction and line opening: The line replacement is completed section by section according to the above process. Once a car 102 of old rails is full, the work unit is moved forward by one car. In a single night's 3-hour maintenance window, 1,500 meters of line replacement can be completed, which is 5 times that of the traditional construction method. After the construction is completed, the position and tightness of the new rails are checked. Once it is confirmed that the line opening standards are met, the train loaded with the recycled old rails leaves the construction section, and the line is opened for operation on time.

[0046] When implementing the double-track laying and rail collection vehicle and the double-track laying and rail collection method, firstly, the railcar 101 pulls multiple flatcars 102 in series to form a rail laying and rail collection train 1. The last flatcar 102 is emptied and used as a carrier for the old rail. The remaining flatcars 102 and the railcar 101 are stacked to place the new rail to be laid. During construction, when the train travels to the construction section, it stops and brakes. The drive gearbox 601 of the gantry drive device 6 is started to drive the drive gear 602 to rotate. Through the meshing transmission with the toothed plate 705, the electric hoist drives the pulley block 702 to move laterally to above the old rail on the ground. The pulley block 702 drives the rail clamping mechanism 703 to descend, clamp the old rail, and lift it away from the sleeper surface. The rail gantry 7 continues to move laterally to above the empty flatcar 102 at the rear and then stacks the old rail stably to complete the old rail recycling. Subsequently, pulley block 702 continues to move laterally to the new rail stacking position of the adjacent flatbed trolley 102. The rail clamping mechanism 703 clamps a new rail and lifts it. After moving laterally in the opposite direction to the original old rail line position for precise alignment, the new rail is lowered onto the sleeper to complete the laying. The old rail recycling and new rail laying are completed sequentially within the same lateral movement stroke of the gantry. During the operation, the traction vehicle 4 is always in the locked state of the limit rod 403.

[0047] When the old rails on the tail flatbed 102 are full, the tractor 4 on the railcar 101 is started to wind up the traction rope 409, and the lifting device 3 is pulled forward along the guide rail 2, and transferred to the penultimate flatbed 102 through the gap between the guide rails of adjacent flatbed 102. Then, the limit rod 403 of the rear tractor 4 is pulled out to release the lock. The operator pushes the tractor 4 along the guide rail 2 to the second-to-last flatbed 102 by the handle 408. After it is in place, the limit rod 403 is inserted into the limit hole 201 at the corresponding position to lock it again. At this time, the original second-to-last flatbed 102 becomes a new empty car. The above old rail recycling and new rail laying process is repeated, and the process is advanced section by section until the replacement of the entire line is completed.

[0048] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A double-track laying and rail-retrieval vehicle, comprising a track-laying and rail-retrieval train (1) consisting of a track car (101) pulling multiple flatbed cars (102) connected in series, wherein both the track car (101) and the flatbed cars (102) include flatbeds, characterized in that: Guide rails (2) are laid on both sides of the vehicle board along the length direction. A lifting device (3) that can move along the guide rail (2) is provided on the guide rail (2). A tractor (4) that can move along the guide rail (2) is also provided on the vehicle board. The tractor (4) is connected to the lifting device (3) through a traction rope (409). The lifting device (3) is fixed with a support member (5) for supporting the track hanger (7). The track hanger (7) straddles the support member (5) and can move laterally along the support member (5). A hanger drive device (6) for driving the track hanger (7) is installed on the support member (5).

2. The double-track laying and rail-retrieval vehicle according to claim 1, characterized in that: During the track laying and retrieval operation, the tail section of the car is empty and used to carry the old track to be recycled. The remaining car sections are stacked with new track to be laid. The guide rails (2) of adjacent car sections (102) are aligned at the ends and have gaps between them. The lifting device (3) and the tractor (4) are transferred between each car section (102).

3. The double-track laying and rail-retrieval vehicle according to claim 2, characterized in that: The lifting device (3) includes a movable support (301) and a movable auxiliary (302) that are rolled together with the guide rail (2) by a movable wheel. A base (303) is fixedly connected to both the movable support (301) and the movable auxiliary (302). A hydraulic rod (305) is provided on the base (303). The support (5) is fixedly inserted into the top of the hydraulic rod (305). A connecting ring (306) is fixed to the side of the base (303) at the end. The traction rope (409) of the tractor (4) is attached to the connecting ring (306), thereby pulling the lifting device (3) to move along the guide rail (2).

4. The double-track laying and rail-retrieval vehicle according to claim 3, characterized in that: The tractor (4) includes a car body (401), on which rollers (402) are provided to cooperate with the guide rail (2). The two ends of the guide rail (2) on the railcar (101) and the tail ends of the guide rail (2) on several flatcars (102) are provided with limiting holes (201). The limiting holes (201) of the car body (401) and the limiting rod (403) are connected together. The car body (401) is fixed with a bracket (404) and a handle (408). The top of the bracket (404) is equipped with a guide pulley (405). The side of the car body (401) is fixed with a guide cylinder (407) through a support plate (406). The traction rope (409) passes around the guide pulley (405) and one end is connected to the lifting device (3). The other end is controlled by the retraction mechanism inside the car body (401).

5. The double-track laying and rail-retrieval vehicle according to claim 4, characterized in that: The track hanger (7) includes a frame, with hanger side rods (704) on both sides of the frame, and a guide rail (706) at the bottom of the hanger side rods (704). The support member (5) includes a bracket (501) fixed on the hydraulic rod (305) and in the shape of a C. A groove (504) is fixed inside the bracket (501), and an auxiliary wheel (505) is installed inside the groove (504) to roll and cooperate with the guide rail (706) to support the movement of the track hanger (7).

6. The double-track laying and rail-retrieval vehicle according to claim 5, characterized in that: The track hanger (7) includes a transverse beam (701) located at the center of the frame. The upper end of the hanger side rod (704) is provided with a toothed plate (705). A side plate (506) is vertically fixed on the outside of the bracket (501). Support plates (507) and support plates (508) are provided on both sides of the side plate (506). The hanger drive device (6) includes a drive reduction gearbox (601) located on the support plate (508). The output shaft of the drive reduction gearbox (601) is provided with a drive gear (602) that meshes with the toothed plate (705), thereby driving the entire track hanger (7) to move laterally along the support member (5). A pulley block (702) is installed at the bottom of the transverse beam (701). The rail clamping mechanism (703) is suspended below the pulley block (702) and can clamp and lift the rail.

7. A method for taking down double-track rails, using the double-track rail-laying and taking down vehicle according to claim 6, characterized in that, Includes the following steps: Step 1: The railcar (101) pulls multiple flatcars (102) to form a rail-laying and rail-collecting train (1). The tail flatcar (102) is empty. New rails are placed on the remaining flatcars (102) and the railcar (101). The lifting device (3) is initially placed on the tail flatcar (102). Step 2: The rail clamping mechanism (703) of the track hanger (7) clamps the old track on the ground, and after being lifted by the pulley block (702), it moves laterally to the top of the empty tail car (102) and is lowered. Then the rail clamping mechanism (703) clamps the new track on the adjacent car (102), lifts it, moves laterally to the original position of the old track and is lowered to complete the laying. Step 3: After the old rail of the tail trolley (102) is fully loaded, start the traction vehicle (4) on the railcar (101) and pull the lifting device (3) along the guide rail (2) to the second to last trolley (102) by the traction rope (409). Then pull out the limit rod (403) of the tail traction vehicle (4), start the tail traction vehicle (4) to move along the guide rail (2) to the second to last trolley (102), and after it is in place, insert the limit rod (403) into the limit hole (201) to lock it. The original penultimate section of the flatbed cart (102) was turned into an empty car, and the old track was recycled and the new track was laid section by section.

8. The double-track track laying and rail collection method according to claim 7, characterized in that: In step two, the old track recycling and the new track laying are completed sequentially within the same track hanger (7) travel range, and the tractor (4) is in a locked state when the track hanger (7) is working.

9. The double-track track laying and rail take-up method according to claim 8, characterized in that: In step three, the hydraulic rod (305) of the lifting device (3) is in the extended state before the transfer; when the tractor (4) is transferred, the locking of the limit plug (403) must be released first. After moving into place, the limit plug (403) is inserted into the corresponding limit hole (201) to complete the positioning, so as to ensure that the vehicle body (401) does not slip during subsequent traction operations.

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