Rail steel rail replacement equipment and construction method

Abstract

The invention discloses rail steel rail replacing equipment which comprises a power tractor, a rail replacing device, a rail replacing device and a rail replacing device. The power tractor serves as power walking equipment and is responsible for dragging an operation vehicle to move between a rail welding base and an operation site and between the rail welding base and the operation site. The rail welding operation vehicle serves as main equipment for steel rail welding and is responsible for completing a steel rail connecting and welding task on an operation site and providing electric energy; the rail conveying operation vehicle serves as a steel rail conveying tool and is responsible for transferring and loading new long steel rails and old steel rails and conveying the new long steel rails and the old steel rails to designated places; the construction of a rail welding base is simplified and the train investment is reduced by optimizing a front procedure; the steel rails do not need to be temporarily stored on the two sides of the rail, and the safety risk is reduced; in addition, the invention further provides a construction method using the track steel rail replacement equipment, and the operation difficulty and the maintenance cost of track replacement can be reduced by controlling and operating the track steel rail replacement equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of rail transit maintenance, and in particular relates to track rail replacement equipment and a construction method. Background Art

[0002] The urbanization process has entered a new stage of development. Rail transit is an important facility in the process of urbanization. At present, the operating mileage of urban rail in my country exceeds 10,000 kilometers, and some lines have been in operation for more than 10 years. In addition, due to some special design reasons, there is a great demand for replacing rails with excessive wear.

[0003] At present, the processes of rail replacement construction, rail unloading, rail re-laying, and rail recycling on urban rails cannot be completed at one construction site due to factors such as operating time and space limitations, resulting in low construction efficiency. In order to improve construction efficiency, multiple processes and different workstations are operated simultaneously, which makes construction organization difficult. Rail welding bases are generally built, equipped with long-rail trains and L-shaped cranes, and the equipment investment is large. Moreover, when the length of the replaced rail is greater than 100 meters, the rail extension welding must be carried out first. At the same time, both the new and old rails need to be temporarily stored on both sides of the track. They are stored there from the time the rails are unloaded, re-laid, and recycled, which poses a risk of rail intrusion and endangering driving safety.

[0004] In response to the above problems, the track rail replacement equipment provided by the present invention is committed to achieving synchronous and co-located construction of rail replacement. Within one construction site, it can complete tasks such as transportation of new long rails, replacement of rails, and recycling of old rails, thereby realizing the functional content of one vehicle with multiple uses. Summary of the invention

[0005] In order to solve the problem that the urban rail replacement device in the above-mentioned prior art is complicated and difficult to construct, the present invention aims to provide a track rail replacement equipment with simple structure and diverse functions. The system consists of a power traction vehicle, a rail welding vehicle, a rail transport vehicle, etc., and has functions such as rail transportation, rail replacement, and rail welding.

[0006] The present invention provides a track rail replacement equipment, the specific technical scheme is as follows, including: a power traction vehicle, a rail welding operation vehicle, and a rail transport operation vehicle connected in sequence; The power tractor: as a power supply device, responsible for pulling the working vehicle to move on the track line; The rail welding vehicle is the main equipment for rail welding, responsible for completing the rail welding function, and also provides power supply function; The rail transport vehicle is the main equipment for rail transportation and rail replacement, and has the functions of long rail transportation, loading and unloading; The number of the rail transport operation vehicles is several groups, and the specific number is grouped accordingly according to the length of the rail replacement operation, and the power traction vehicle and the rail welding operation vehicle are connected to both ends of the rail transport operation vehicle.

[0007] Preferably, the specific structure of the rail welding vehicle includes: a transport vehicle, a rail hanger, and a mobile rail welding unit; The transport vehicle adopts a load-bearing platform design to provide installation space for the mobile rail welding unit and the rail hanger; The rail hanger is arranged under the transport vehicle platform to load and transport the rails and provide a mounting function; The rail welding operation unit is arranged on the transport vehicle platform to provide welding function for the rail changing operation.

[0008] As a preferred embodiment, the specific structure of the rail transport vehicle includes: a transport vehicle, a rail hanger, a lifting cylinder, and a transverse lifting mechanism; The rail transport vehicle and the rail welding vehicle use the same platform design of the transport vehicle; The rail hanger is arranged under the platform of the transport vehicle; The transport vehicle is also provided with a lifting cylinder for lifting the entire rail transport vehicle to facilitate rail changing operations; The transverse movement lifting mechanism is perpendicular to the direction of the hanger and is arranged on the transport vehicle to lift and transversely move the rails.

[0009] As a preference, the specific structure of the transport vehicle comprises: a wheelset and a vehicle body; The wheelset adopts a design without a through axle and is provided with a bogie, and the wheelset is connected to the vehicle body through a center pin and fixed with bolts; The car body is used to meet the loading needs and adopts a variable cross-section design to reduce the coverage of the car body and provide convenient conditions for on-site track changing operations.

[0010] Preferably, the rail hanger is welded with steel sections and fixed on the longitudinal beam of the transport vehicle to support the rails, and rollers are installed at the bottom of the rails of the rail hanger on the rail welding vehicle to facilitate the rails to slide on the bracket of the rail welding vehicle; The rail hanger is also provided with a reinforcement device to lock the rail and the rail hanger to prevent the rail from moving during transportation.

[0011] Preferably, the specific structure of the mobile rail welding unit includes: a welding cabin and a power cabin; The welding cabin is used to realize the rail welding function; The power compartment provides the function of power supply.

[0012] Preferably, the specific structure of the lifting cylinder is that the outrigger cylinders are arranged at the four corners of the rail transport vehicle, and four sets of the outrigger cylinders are arranged. During operation, the outrigger cylinders are lifted to lift and support the rail transport vehicle, and the wheels leave the track rails.

[0013] Preferably, each of the transport vehicles of the multifunctional rail transport trolley is provided with two sets of the transverse moving and lifting mechanisms at both the front and rear ends to facilitate the lifting and transfer of the rails.

[0014] Preferably, the power compartment is used to supply power to the hydraulic system of the jacking cylinder, the rail loading and unloading system of the transverse lifting mechanism, and the entire train lighting system.

[0015] At the same time, the present invention also provides a construction method of a track rail replacement equipment using the track rail replacement equipment, and the specific steps are as follows: (1) Loading long rails: first, hoist the long rails into the middle of the track line, and the track rail replacement equipment enters the track line and aligns with the long rails; each of the rail transport vehicles hoists and mounts the long rails and reinforces them; repeat the above process to complete the loading of multiple long rails; (2) Transportation of long rails: The rail replacement equipment, under the traction of the power traction vehicle, arrives at the rail replacement operation area and transports the long rails to the operation site; (3) Rail alignment: Align the two ends of the new rails with the starting point and the end point of the rail change to complete the train alignment; (4) Reorganizing the train: the rail transport vehicle is fixed, the track rail replacement equipment is unmarshaled, the power traction vehicle and the rail welding vehicle form a rail welding unit, which is separated from the rail transport vehicle, so that the end of the long rail is separated from the rail welding unit and kept at a certain distance; (5) Removal of old rails: remove the old rail buckle accessories and connectors, use the rail transport vehicle to lift the two old rails, and move them horizontally to the outside of the track to make room for the new rails; (6) Laying of new rails: Unlock the long rails, use the rail transport vehicle to lift two new long rails, and place them in the rail bearing grooves to prepare for subsequent rail welding operations; (7) Recovery of old rails: After the new long rail pads are completed, the rail transport vehicle lifts the two old rails to the rail hanger and reinforces them to complete the recovery of the old rails; (8) Rail welding: The rail welding unit moves toward the rail joint, and when it is in place, extends the welding head to prepare for rail welding. The rail welding units at both ends weld one rail each to complete the connection between one end of the new long rail and the track line; After one end of the new long rail is welded to the track line, stress relief and locking begin, the stress relief roller is removed, and the buckle accessories are installed to complete the stress relief and locking of the rail; After stress release and locking are completed, rail locking welding begins, and the other end of the new long rail is welded to the track line to complete rail locking welding; (9) Equipment exit: After the rail welding unit completes the rail welding operation, the welding head is recovered and the equipment is restored and reinforced; the rail welding unit slowly moves towards the rail transport vehicle to ensure that the rails enter the rail hanger of the rail welding vehicle smoothly, and the connection is restored to complete the train formation; the equipment status, rail reinforcement, etc. are checked, and after confirmation, the rail replacement train slowly exits the operation section (10) Line restoration: After completing the installation of line fasteners, line inspection, personnel organization, and tool inventory and recovery, and after confirmation that everything is correct, the train returns, personnel exit, and the line is restored.

[0016] Compared with the prior art, the technical solution has the following beneficial effects: it provides a track rail replacement equipment with a simple structure and convenient operation. The system consists of a power traction vehicle, a rail welding vehicle, and a rail transport vehicle. By optimizing the processes of base rail welding and rail transportation, the construction of the rail welding base is simplified, and the investment in long rail trains and on-board L-shaped cranes is reduced. The number of rail transport trolleys can be increased or decreased to realize the transportation of rails of different lengths, thereby increasing the flexibility of rail transportation. There is no need to use pneumatic welding or thermite welding for rail extension welding. The rails do not need to be temporarily stored on both sides of the track, thereby reducing safety risks. In addition, another object of the present invention is to provide a construction method using track rail replacement equipment, which can reduce the operational difficulty and maintenance cost of track replacement by controlling and operating the track rail replacement equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of a track rail replacement equipment in a specific embodiment; Figure 2 This is a schematic front view of the rail welding vehicle structure; Figure 3 This is a schematic top view of the rail welding vehicle structure; Figure 4 It is a schematic cross-sectional view of the transport vehicle structure; Figure 5It is a schematic cross-sectional view of the rail hanger structure; Figure 6 The main view of the structure of the rail transport vehicle is shown; Figure 7 This is a top view showing the structure of the rail transport vehicle.

[0019] The specific figures are: 1. Power traction vehicle; 2. Rail welding vehicle; 3. Rail transport vehicle; 4. Transport vehicle; 5. Rail hanger; 6. Mobile rail welding unit; 7. Lifting cylinder; 8. Transverse lifting mechanism; 9. Wheel set; 10. Vehicle body; 11. Welding cabin; 12. Power cabin. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0024] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0025] Please refer to Figures 1 to 7 , the track rail replacement equipment provided by a specific embodiment of the technical solution of the present invention is described, and its structure includes: a power traction vehicle 1, a rail welding operation vehicle 2, and a rail transport operation vehicle 3 connected in sequence; like Figure 1 As shown, in this embodiment, the entire track rail replacement equipment is specifically a special train set, and the power traction vehicle 1 is arranged at both ends of the train set; The power tractor 1 is a power running device for the entire train formation, responsible for providing power to traction the working vehicle to move and operate at the rail welding base, the working site and between the two. In this embodiment, the specific power type of the power tractor 13 is not limited, because under different working conditions, the traction power can be adaptively selected according to the actual use situation, according to the motor drive or the internal combustion engine drive; the power tractor 1: as a power providing device, responsible for traction working vehicles to move and operate on the track line; like Figure 2 and Figure 3 As shown, in this embodiment, behind the power tractor 1, the rail welding vehicle 2 is connected in sequence: as the main equipment for rail welding, it is responsible for completing the rail connection welding task at the operation site. In rail welding operations, gas pressure welding (flash welding) or thermite welding is often used for rail welding. In this embodiment, there is no limitation on the specific type of welding, and it can be selected and set according to the actual operation conditions. In this embodiment, the rail welding vehicle 2 also provides the function of power supply; The rail transport vehicle 3 is the main equipment for rail transportation and rail replacement, and has the functions of long rail transportation, loading and unloading; Moreover, in the present embodiment, the number of the rail transport vehicles 3 is several groups, and the specific number is grouped according to the length of the rails for the rail changing operation, and the power traction vehicle 1 and the rail welding vehicle 2 are connected to both ends of the rail transport vehicle 3, and the head and tail are symmetrically arranged, so that the rail welding operation can be carried out synchronously and crosswise, and the two rail joints can be welded more quickly, thereby improving the efficiency of rail welding construction.

[0026] Preferably, the rail welding vehicle 2 in this embodiment is further limited as follows: Figure 3 and Figure 4 As shown, in this embodiment, the specific structure of the rail welding vehicle 2 includes: a transport vehicle 4, a rail hanger 5, and a mobile rail welding unit 6; like Figure 3 As shown, the transport vehicle 4 serves as an installation platform for the entire rail welding vehicle 2, and adopts a load-bearing platform design to provide installation space for the mobile rail welding unit 6 and the rail hanger 5; More specifically, the rail hanger 5 is arranged under the platform of the transport vehicle 4 to load and transport the rails and provide a mounting function. By cooperating with the hoisting of the rail transport vehicle 3, the rails can be conveniently hung and loaded. The rail welding operation unit is arranged on the platform of the transport vehicle 4 to provide welding function for the rail changing operation. Through the load-bearing design on the platform, a larger installation space can be provided for the rail welding functional components, and the existing functional components can be directly used for direct installation and setting, without the need for separate optimization design for the internal space of the vehicle body 10.

[0027] Similarly, the rail transport vehicle 3 in this embodiment is further limited as follows: Figure 6 and Figure 7 As shown, in this embodiment, the specific structure of the rail transport vehicle 3 includes: a transport vehicle 4, a rail hanger 5, a lifting cylinder 7, and a transverse lifting mechanism 8; like Figure 6 As shown, the rail transport vehicle 3 and the rail welding vehicle 2 use the same platform design of the transport vehicle 4, and the modular transport vehicle 4 design can reduce the design difficulty and manufacturing cost of the entire track rail replacement equipment. In addition, since the top space of the transport vehicle 4 of the rail transport vehicle 3 is abundant, various functional components can be provided according to actual operation needs. Similarly, in order to ensure the consistency of loading and transportation of the rails, the rail hanger 5 is also provided under the platform of the transport vehicle 4 of the rail transport vehicle 3; What is different from the rail welding vehicle 2 being provided with the mobile rail welding unit 6 is that the transport vehicle 4 of the rail transport vehicle 3 is also provided with a jacking cylinder 7. By using the jacking cylinder 7, the entire rail transport vehicle 3 can be jacked up so that the transport vehicle 4 can be separated from the track, which is convenient for rail changing operations; In addition, the transverse lifting mechanism 8 is provided on the transport vehicle 4 at right angles to the direction of the hanger on the rail transport vehicle 3 to lift and transversely move the rails, thereby avoiding the need for additional lifting mechanisms at the construction site.

[0028] Furthermore, in this embodiment, the specific structures of the transport vehicle 4 on the rail welding vehicle 2 and the rail transport vehicle 3 are further limited, such as Figures 2 to 4 as well as Figure 6 and Figure 7 As shown, in this embodiment, the specific structure of the transport vehicle 4 includes: a wheel set 9 and a vehicle body 10; Since in this embodiment, the rail hanger 5 is arranged at the bottom of the transport vehicle 4, the wheelset 9 adopts a design without a through axle, which is convenient for the rail to pass through the bottom of the transport vehicle 4, and a bogie is arranged to facilitate the curvature movement of the entire transport vehicle 4. The wheelset 9 is connected to the vehicle body 10 through a center pin and fixed with bolts; And if Figure 3 and Figure 4 as well as Figure 7 As shown, the main function of the car body 10 is to meet the loading needs. At the same time, a variable cross-section design is adopted to reduce the coverage of the car body 10 to achieve the purpose of reducing the overall weight, provide convenient conditions for on-site track replacement operations, and make the overall track rail replacement equipment have a smaller curb weight and adapt to construction scenarios in more terrain environments.

[0029] Preferably, in this embodiment, the specific structure of the rail hanger 5 on the rail welding vehicle 2 and the rail transport vehicle 3 is further limited, such as Figure 5 As shown, in this embodiment, the rail hanger 5 is welded with steel sections and fixed on the longitudinal beam of the transport vehicle 4 to lift the rails. In this embodiment, the specific number of the rail hangers 5 is 6 groups, and on the rail welding vehicle, rollers are installed at the bottom of the rails of the rail hangers 5 to facilitate the sliding of the rails on the brackets; the rail hangers 5 on the rail transport vehicle 3 are not equipped with rollers, and there is no need to consider the longitudinal sliding of the rails. The rail hangers 5 on the rail welding vehicle 2 are equipped with rollers at the bottom of the rails to facilitate the sliding of the rails on the brackets when the train is disassembled.

[0030] The rail hanger 5 is also provided with a reinforcement device to lock and fix the rail to the rail hanger 5 to prevent the rail from moving during transportation, thereby preventing accidents such as falling, thereby ensuring operational safety.

[0031] As a preferred example, Figure 2 As shown, the specific structure of the mobile rail welding unit 6 in this embodiment is further defined, and its functional components mainly include: a welding cabin 11 and a power cabin 12; The welding cabin 11 is used to realize the rail welding function, and the welding cabin 11 group is arranged close to the rail transport vehicle 3, which is convenient for welding the rail connection; The power compartment 12 provides the function of power supply, providing power supply for the entire track rail replacement equipment, and facilitating the use of various equipment during construction operations.

[0032] As a preferred example, Figure 6 and Figure 7 As shown, in the present embodiment, the specific structure of the lifting cylinder 7 is an outrigger cylinder, which is arranged at the four corners of the rail transport vehicle 3. Four sets of outrigger cylinders are provided. During operation, the outrigger cylinders have a lifting effect to lift and support the rail transport vehicle 3, and the wheelset 9 leaves the track rails.

[0033] Furthermore, if Figure 7 As shown, in the present embodiment, on each of the transport vehicles 4 of the multifunctional rail transport trolley, two sets of the transverse moving and lifting mechanisms 8 are provided at both the front and rear ends to facilitate the lifting and transfer of the rails, and every two sets of the corresponding transverse moving and lifting mechanisms 8 are cross-distributed, so that the rails can be lifted over a larger range.

[0034] Furthermore, in the present embodiment, the power compartment 12 serves as a component for providing electrical energy to the functional components of the entire track rail replacement equipment, and its specific power supply range includes: being used to supply power to the hydraulic system of the jacking cylinder 7, the rail loading and unloading system of the transverse lifting mechanism 8, and the entire train lighting system.

[0035] At the same time, the present invention also provides a track rail replacement construction method using the track rail replacement equipment, and the specific steps are as follows: (1) Loading long rails: first, hoist the long rails into the middle of the track line, and the track rail replacement equipment enters the track line and aligns with the long rails; each of the rail transport vehicles 3 hoists and mounts the long rails and reinforces them; repeat the above process to complete the loading of multiple long rails; (2) Long rail transportation: The rail replacement equipment, under the traction of the power traction vehicle 1, arrives at the rail replacement operation area and transports the long rail to the operation site; (3) Rail alignment: Align the two ends of the new rails with the starting point and the end point of the rail change to complete the train alignment; (4) Reorganizing the train: the rail transport vehicle 3 is fixed, the track rail replacement equipment is unmarshaled, the power traction vehicle 1 and the rail welding vehicle 2 form a rail welding unit, which is separated from the rail transport vehicle 3, so that the end of the long rail is separated from the rail welding unit and kept at a certain distance; (5) Removal of old rails: remove the old rail buckle accessories and connectors, use the rail transport vehicle 3 to lift the two old rails, and move them horizontally to the outside of the track to make room for the new rails; (6) Laying of new rails: Unlock the long rails, use the rail transport vehicle 3 to lift two new long rails, and place them in the rail bearing grooves to prepare for subsequent rail welding operations; (7) Recovery of old rails: Specifically in this embodiment, after the separation of the marshaling, the rail transport vehicle 3 starts the hydraulic pump station to operate the outrigger cylinders of the rail transport vehicle 3 to start the lifting operation, so that each rail transport vehicle 3 and the mounted long rails rise and leave the track rails. After the new long rails are supported, the rail transport vehicle 3 uses the transverse lifting mechanism 8 to lift the two old rails to the rail hanger 5 and reinforce them, completing the recovery of the old rails; (8) Rail welding: The rail welding unit moves toward the rail joint, and when it is in place, extends the welding head to prepare for rail welding. The rail welding units at both ends weld one rail each to complete the connection between one end of the new long rail and the track line; After one end of the new long rail is welded to the track line, stress relief and locking begin, the stress relief roller is removed, and the buckle accessories are installed to complete the stress relief and locking of the rail; After stress release and locking are completed, rail locking welding begins, and the other end of the new long rail is welded to the track line to complete rail locking welding; (9) Equipment exit: After the rail welding unit completes the rail welding operation, the welding head is recovered and the equipment is restored and reinforced; the rail welding unit slowly moves towards the rail transport vehicle 3 to ensure that the rails smoothly enter the rail hanger 5 of the rail welding vehicle 2, and the connection is restored to complete the train formation; the equipment status, rail reinforcement, etc. are checked, and after confirmation, the rail replacement train slowly exits the operation section (10) Line restoration: After completing the installation of line fasteners, line inspection, personnel organization, and tool inventory and recovery, and after confirmation that everything is correct, the train returns, personnel exit, and the line is restored.

[0036] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A track rail replacement equipment, characterized in that: Including the following connected in sequence: power traction vehicle, rail welding vehicle, rail transport vehicle; The power tractor: as a power supply device, responsible for pulling the working vehicle to move on the track line; The rail welding vehicle is the main equipment for rail welding, responsible for completing the rail welding function, and also provides power supply function; The rail transport vehicle is the main equipment for rail transportation and rail replacement, and has the functions of long rail transportation, loading and unloading; The number of the rail transport operation vehicles is several groups, and the specific number is grouped accordingly according to the length of the rail replacement operation, and the power traction vehicle and the rail welding operation vehicle are connected to both ends of the rail transport operation vehicle.

2. The track rail replacement equipment according to claim 1, characterized in that: The specific structure of the rail welding vehicle includes: a transport vehicle, a rail hanger, and a mobile rail welding unit; The transport vehicle adopts a load-bearing platform design to provide installation space for the mobile rail welding unit and the rail hanger; The rail hanger is arranged under the transport vehicle platform to load and transport the rails and provide a mounting function; The rail welding operation unit is arranged on the transport vehicle platform to provide welding function for the rail changing operation.

3. The track rail replacement equipment according to claim 2, characterized in that: The specific structure of the rail transport vehicle includes: a transport vehicle, a rail hanger, a lifting cylinder, and a transverse lifting mechanism; The rail transport vehicle and the rail welding vehicle adopt the same platform design of the transport vehicle; the rail hanger is arranged under the platform of the transport vehicle; The transport vehicle is also provided with a lifting cylinder for lifting the entire rail transport vehicle to facilitate rail changing operations; The transverse movement lifting mechanism is perpendicular to the direction of the hanger and is arranged on the transport vehicle to lift and transversely move the rails.

4. The track rail replacement equipment according to claim 3, characterized in that: The specific structure of the transport vehicle includes: a wheel set and a vehicle body; The wheelset adopts a design without a through axle and is provided with a bogie, and the wheelset is connected to the vehicle body through a center pin and fixed with bolts; The car body is used to meet the loading needs and adopts a variable cross-section design to reduce the coverage of the car body and provide convenient conditions for on-site track changing operations.

5. The track rail replacement equipment according to claim 4, characterized in that: The rail hanger is welded with steel sections and fixed on the longitudinal beam of the transport vehicle to support the rails. In addition, rollers are installed at the bottom of the rails of the rail hanger on the rail welding vehicle to facilitate the rails to slide on the bracket of the rail welding vehicle. The rail hanger is also provided with a reinforcement device to lock the rail and the rail hanger to prevent the rail from moving during transportation.

6. The track rail replacement equipment according to claim 5, characterized in that: The specific structure of the mobile rail welding unit includes: a welding cabin and a power cabin; The welding cabin is used to realize the rail welding function; The power compartment provides the function of power supply.

7. The track rail replacement equipment according to claim 6, characterized in that: The specific structure of the lifting cylinder is that the outrigger cylinders are arranged at the four corners of the rail transport vehicle, and four sets of the outrigger cylinders are arranged. During operation, the outrigger cylinders are lifted to lift and support the rail transport vehicle, and the wheels leave the track rails.

8. The track rail replacement equipment according to claim 7, characterized in that: On each of the transport vehicles of the multifunctional rail transport trolley, two sets of transverse lifting mechanisms are arranged at the front and rear ends to facilitate the lifting and transfer of the rails.

9. The track rail replacement equipment according to claim 8, characterized in that: The power compartment is used to supply power to the hydraulic system of the jacking cylinder, the rail loading and unloading system of the transverse lifting mechanism, and the entire train lighting system.

10. A construction method for track rail replacement equipment, for replacing rails using the track rail replacement equipment according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: (1) Loading long rails: First, the long rails are hoisted into the middle of the track line, and the track rail replacement equipment enters the track line and aligns with the long rails; each of the rail transport vehicles hoists and mounts the long rails and reinforces them; Repeat the above process to complete the loading of multiple long rails; (2) Transportation of long rails: The rail replacement equipment, under the traction of the power traction vehicle, arrives at the rail replacement operation area and transports the long rails to the operation site; (3) Rail alignment: Align the two ends of the new rails with the starting point and the end point of the rail change to complete the train alignment; (4) Reorganizing the train: the rail transport vehicle is fixed, the track rail replacement equipment is unmarshaled, the power traction vehicle and the rail welding vehicle form a rail welding unit, which is separated from the rail transport vehicle, so that the end of the long rail is separated from the rail welding unit and kept at a certain distance; (5) Removal of old rails: remove the old rail buckle accessories and connectors, use the rail transport vehicle to lift the two old rails, and move them horizontally to the outside of the track to make room for the new rails; (6) Laying of new rails: Unlock the long rails, use the rail transport vehicle to lift two new long rails, and place them in the rail bearing grooves to prepare for subsequent rail welding operations; (7) Recovery of old rails: After the new long rail pads are completed, the rail transport vehicle lifts the two old rails to the rail hanger and reinforces them to complete the recovery of the old rails; (8) Rail welding: The rail welding unit moves toward the rail joint, and when it is in place, extends the welding head to prepare for rail welding. The rail welding units at both ends weld one rail each to complete the connection between one end of the new long rail and the track line; After one end of the new long rail is welded to the track line, stress relief and locking begin, the stress relief roller is removed, and the buckle accessories are installed to complete the stress relief and locking of the rail; After stress release and locking are completed, rail locking welding begins, and the other end of the new long rail is welded to the track line to complete rail locking welding; (9) Equipment exit: After the rail welding unit completes the rail welding operation, the welding head is recovered and the equipment is restored and reinforced; the rail welding unit slowly moves towards the rail transport vehicle to ensure that the rails enter the rail hanger of the rail welding vehicle smoothly, and the connection is restored to complete the train formation; the equipment status, rail reinforcement, etc. are checked, and after confirmation, the rail replacement train slowly exits the operation section (10) Line restoration: After completing the installation of line fasteners, line inspection, personnel organization, and tool inventory and recovery, and after confirmation that everything is correct, the train returns, personnel exit, and the line is restored.

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