Pipeline take-up and pay-off device for separated operation of railway rail welding construction

Abstract

The pipeline winding and unwinding device comprises a frame assembly, a fixed pulley transmission assembly, a movable pulley sliding assembly and a pipeline conveying assembly are arranged on the frame assembly, the fixed pulley transmission assembly is fixedly arranged on the frame assembly, and the movable pulley sliding assembly is arranged on the frame assembly in a sliding mode in the front-back direction; the fixed end of the pipeline conveying assembly is fixed to the frame assembly, the pipeline conveying assembly is wound backwards to act on the movable pulley sliding assembly and then is transmitted forwards to act on the fixed pulley transmission assembly, and the free end of the pipeline conveying assembly extends out of the frame assembly. The device has the beneficial effects that it is guaranteed that when the rail welding vehicle carries out separation method operation on an ultrahigh line and a welding machine is far away from a vehicle body, the pipeline does not need to be disassembled, the operation time is shortened, meanwhile, it is guaranteed that when the welding machine is retracted to the vehicle, the pipeline is completely retracted into the releasing device, and it is guaranteed that space utilization is normative and orderly.

Description

Technical Field

[0001] The present application belongs to the technical field of railway rail welding construction, and specifically relates to a pipeline retracting and releasing device used for separate operation of railway rail welding construction. Background Art

[0002] The pneumatic rail welding vehicle (hereinafter referred to as the welding vehicle) is a device that can realize the integrated construction of rail welding. It has the advantages of high welding quality, high construction efficiency, and strong adaptability. However, when the existing pneumatic rail welding vehicle is performing online welding, it needs a support vehicle to pad the rails, which will increase the difficulty and risk of construction, especially under complex line conditions such as high altitude, large slope, and large superelevation. In view of the high safety risk of rail welding operations on super-elevated railway lines, a rail welding separation construction process plan is proposed, that is, on the basis of the existing pneumatic rail welding vehicle, a separate welding trolley and a pipe and wire retracting device are added, so that the welding machine can be separated from the rail welding vehicle during construction, and online welding operations can be performed at the welding position. The rail welding vehicle can be safely parked on the original line track without the need for support pads to raise it, thereby avoiding the risk of vehicle overturning and ensuring construction safety. Utility Model Content

[0003] For the separation construction method, the problem of rapid retraction and standardized storage of welding machine pipelines in a limited space must be solved. In order to ensure the realization of this process, a pipeline retraction device for separated operation of railway welding rail construction is designed to solve this problem.

[0004] The purpose of this application is achieved through the following technical solutions:

[0005] A pipeline retracting and releasing device for separate operation of railway rail welding construction comprises a frame assembly, on which a fixed pulley transmission assembly, a movable pulley sliding assembly and a pipeline conveying assembly are arranged, the fixed pulley transmission assembly is fixedly arranged on the frame assembly, the movable pulley sliding assembly is slidably arranged on the frame assembly along the front-rear direction, the fixed end of the pipeline conveying assembly is fixed on the frame assembly, the pipeline conveying assembly is wound backward to act on the movable pulley sliding assembly and then transmitted forward to act on the fixed pulley transmission assembly, and the free end of the pipeline conveying assembly extends out of the frame assembly.

[0006] Furthermore, the frame assembly is also provided with a pipeline guide assembly and a power assembly. The pipeline conveying assembly is inserted into the guide channel of the pipeline guide assembly. The pipeline guide assembly and the fixed pulley transmission assembly are both located at the front end of the frame assembly. The pipeline guide assembly is relatively forward of the fixed pulley transmission assembly. The power assembly drives the fixed pulley transmission assembly, and the fixed pulley transmission assembly drives the movable pulley sliding assembly.

[0007] Further, the power assembly drives the fixed pulley transmission assembly to move by single power, and the fixed pulley transmission assembly drives the movable pulley sliding assembly to move through a transmission component. The transmission component is relatively fixed to the pipeline conveying assembly, so that the moving speed of the movable pulley sliding assembly is consistent with the moving speed of the pipeline conveying assembly.

[0008] Further, the transmission component is a chain, a belt or a synchronous belt.

[0009] Further, the frame assembly includes a frame. The frame is a cuboid structure with a hollow interior. The fixed pulley transmission assembly, the movable pulley sliding assembly and the pipeline conveying assembly are located inside the frame, and the power assembly is located outside the frame. A lifting lug is provided at the top of the frame, and a slide rail seat for supporting the movable pulley sliding assembly is provided at the bottom side inside the frame.

[0010] Further, the pipeline guiding assembly includes a corner transition block, a guiding correction block and a positioning conveying wheel arranged in sequence along the wire outlet direction. A guiding channel is formed inside the corner transition block, the guiding correction block and the positioning conveying wheel.

[0011] Further, the fixed pulley transmission assembly includes a driving wheel which is rotatably arranged on the frame assembly and has a transmission effect with the conveyor belt of the pipeline conveying assembly.

[0012] Further, the fixed pulley transmission assembly further includes a dragging belt, a steering wheel group and a transmission belt. The annular transmission belt is rotatably arranged on the frame assembly through the steering wheel group. The driving wheel is connected to the steering wheel group through the dragging belt, and the top end of the transmission belt is connected to the movable pulley sliding assembly.

[0013] Further, the movable pulley sliding assembly includes a linear slide rail, a sliding wheel seat and a driven wheel. The linear slide rail is arranged on the frame assembly. The sliding wheel seat is slidably arranged on the linear slide rail in the front-back direction. The driven wheel is rotatably arranged on the sliding wheel seat and has a winding effect with the conveyor belt of the pipeline conveying assembly.

[0014] Further, the pipeline conveying assembly includes a conveyor belt and a pipeline. The fixed ends of the conveyor belt and the pipeline are both fixed on the frame assembly. The conveyor belt winds around the movable pulley sliding assembly backward and then drives forward on the fixed pulley transmission assembly. The pipeline is fixed on the conveyor belt in the same direction as the conveyor belt. The free ends of the conveyor belt and the pipeline extend out of the frame assembly; the pipeline is fixed on the conveyor belt through a plurality of pipeline clamping plates; the pipeline conveying assembly further includes an extension limit switch and a retraction limit switch, and the extension limit switch and the retraction limit switch are respectively located at the front and rear extreme positions of the movable pulley sliding assembly.

[0015] Further, the power assembly is a rotary motor or an electric motor, the speed detection device is a rotary encoder; the transmission component is a chain, a belt or a synchronous belt.

[0016] Advantages of this application: When the rail welding vehicle operates using the separation method on a super-elevated line, this device ensures that when the welding machine is away from the vehicle body, there is no need to disconnect the pipelines, reducing the operation time. At the same time, when the welding machine is retracted onto the vehicle, the pipelines are completely retracted into the retracting and releasing device, ensuring the standardized and orderly utilization of space.

[0017] The main solution of this application and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in this application; moreover, in this application, (each non-conflicting alternative) alternatives can be freely combined with each other and with other alternatives. Those skilled in the art can understand that there are various combinations based on the prior art and common general knowledge after understanding the solutions of this application, all of which are the technical solutions to be protected in this application, and will not be enumerated here. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the principle of this application.

[0019] Figure 2 is a schematic diagram of the structure of this application.

[0020] Figure 3 is a schematic diagram of the structure of the frame component of this application.

[0021] Figure 4 is a schematic diagram of the structure of the pipeline guiding component of this application.

[0022] Figure 5 is a schematic diagram of the structure of the fixed pulley transmission component of this application.

[0023] Figure 6 is a schematic diagram of the structure of the movable pulley sliding component of this application.

[0024] Figure 7 is a schematic diagram of the structure of the pipeline conveying component of this application.

[0025] Figure 8 is a schematic diagram of the structure of the power component of this application.

[0026] In the figure: 1 - frame component, 2 - pipeline guiding component, 3 - fixed pulley transmission component, 4 - movable pulley sliding component, 5 - pipeline conveying component, 6 - power component; 101 - frame, 102 - lifting lug, 103 - slide rail seat, 201 - corner transition block, 202 - guiding correction block, 203 - positioning conveying wheel, 301 - driving wheel, 302 - dragging belt, 303 - steering wheel set, 304 - transmission belt, 401 - linear slide rail, 402 - sliding wheel seat, 403 - driven wheel, 501 - conveyor belt, 502 - pipeline, 503 - pipeline clamping plate, 504 - extension limit switch, 505 - recovery limit switch, 506 - free end, 507 - fixed end, 601 - rotary motor, 602 - rotary encoder, 603 - transmission main shaft. Detailed implementation mode

[0027] The following non - restrictive embodiments are used to illustrate the present application.

[0028] Reference Figure 1 As shown, the specific working principle of this pipeline retracting and extending device is as follows: By adopting a way of fixed pulley - movable pulley transmission, the length space occupied by the pipeline is saved, the retraction and extension of the pipeline are realized, and at the same time, the pipelines of a single - group pulley are easy to sort out.

[0029] Utilizing the limited length space at the top of the front end of the vehicle body, the whole device is designed as a cuboid frame structure. The pipelines required for the separated operation construction of the welding machine, including hydraulic, water, liquid, electricity, gas and other pipelines, are retracted and placed in the device by using a pulley set. The whole device is closed except for the pipeline outlet end, and all transmission, retraction and extension actions are carried out inside, ensuring the safety of equipment and personnel during operation. At the same time, storing the pipelines in the device can avoid safety risks such as hanging and tripping of equipment and personnel when the pipelines are placed outside. This device ensures that all pipelines do not need to be separated when the welding machine works away from the vehicle, and ensures that harmful media such as oil, electricity, and gas do not leak from the joints, thus avoiding physical harm to equipment and personnel and environmental pollution.

[0030] Embodiment 1

[0031] Reference Figures 1 to 8 As shown, a pipeline retracting and extending device for separated operation in railway rail welding construction includes a frame component 1, a pipeline guiding component 2, a fixed pulley transmission component 3, a movable pulley sliding component 4, a pipeline conveying component 5 and a power component 6.

[0032] The frame component 1 is in a cuboid structure, and all other components are installed relying on the frame. There are a pipeline guiding component 2, a fixed pulley transmission component 3, a movable pulley sliding component 4, a pipeline conveying component 5, and a power component 6 on the frame component 1. The pipeline guiding component 2 is located at the very front end of the frame component 1. The pipeline conveying component 5 is arranged in the guiding channel of the pipeline guiding component 2, and is used for turning and transitioning the pipeline conveying component 5 extending out of the frame component 1 to ensure smooth transition.

[0033] The fixed pulley transmission component 3 is fixedly arranged on the frame component 1. The fixed pulley transmission component 3 is located at the front end of the frame component 1 and is relatively rearward with respect to the pipeline guiding component 2. The fixed pulley transmission component 3 directly drives the pipeline conveying component 5, so as to drive the pipeline conveying component 5 to extend forward or retract backward.

[0034] The movable pulley sliding component 4 is slidably arranged on the frame component 1 in the front-rear direction. The movable pulley sliding component 4 moves forward or backward following the retraction and extension of the pipeline conveying component 5. Since the pipeline conveying component 5 is wound around the movable pulley sliding component 4, that is, the movable pulley sliding component 4 pulls and supports the pipeline conveying component 5, the forward / backward movement amount of the movable pulley sliding component 4 is twice the extension / retraction amount of the pipeline conveying component 5.

[0035] The fixed end of the pipeline conveying component 5 is fixed on the frame component 1. The pipeline conveying component 5 is wound backward and acts on the movable pulley sliding component 4 and then is transmitted forward to act on the fixed pulley transmission component 3. The free end of the pipeline conveying component 5 extends out of the frame component 1. Thus, by the cooperative action of the fixed pulley transmission component 3 and the movable pulley sliding component 4, the retraction and extension of the pipeline conveying component 5 are realized.

[0036] The power component 6 is a single-power drive to make the fixed pulley transmission component 3 move, and provides the power for the fixed pulley transmission component 3 to drive the pipeline conveying component 5. The fixed pulley transmission component 3 drives the movable pulley sliding component 4 to move through a transmission part, and provides the power for the movable pulley sliding component 4 to slide forward and backward to retract and extend the pipeline conveying component 5. The transmission part is relatively fixed to the pipeline conveying component through an intermediate shaft, so that the movement speed of the movable pulley sliding component is consistent with the movement speed of the pipeline conveying component. Similarly, the power sources of the fixed pulley transmission component 3 and the movable pulley sliding component 4 can be independent of each other, or the power component 6 can first drive the movable pulley sliding component 4 and then drive the fixed pulley transmission component 3 through the movable pulley sliding component 4. The transmission part is a chain, a belt or a timing belt. In this embodiment, each wheel-belt is described with a sprocket-chain.

[0037] The frame component 1 includes a frame 101, a lifting lug 102, and a slide rail seat 103. The frame 101 is a rectangular parallelepiped structure formed by welding rectangular tubes and is hollow inside to accommodate other components. The pipeline guiding component 2, the fixed pulley transmission component 3, the movable pulley sliding component 4, and the pipeline conveying component 5 are located inside the frame 101, and the power component 6 is located outside the frame 101.

[0038] A lifting lug 102 is fixedly provided at the top of the frame 101, facilitating the hoisting of the entire device. A slide rail seat 103 for supporting the movable pulley sliding component 4 is provided on the bottom side inside the frame 101. The movable pulley sliding component 4 pulls the pipeline conveying component 5 to move inside the frame 101, facilitating the maximum extension and retraction length of the pipeline by making use of the limited narrow space on the vehicle body.

[0039] The pipeline guiding component 2 includes a corner transition block 201, a guiding correction block 202, and a positioning conveying wheel 203 arranged in sequence along the wire outlet direction. The entire guiding component is installed at the front end of the frame 101, including two groups on the left and right sides, and all parts are installed on the side walls of the frame 101. A guiding channel is formed inside the corner transition block 201, the guiding correction block 202, and the positioning conveying wheel 203, and the channel is for the pipeline to pass through to achieve the guiding transition of the pipeline.

[0040] During pipeline conveying, first, the internal horizontal straight state passes through the arc-shaped corner transition block. The transition block not only guides the pipeline to change the wire outlet direction but also ensures the smooth meshing of the conveying chain through its relative fixed position with the driving wheel, thus maintaining the stability of the pipeline movement during traction. Then the pipeline passes through the guiding correction block. The correction block further narrows the aisle gap relative to the transition block and adjusts the wire outlet direction to prevent the pipeline from vibrating during transmission. Finally, the two sides of the positioning conveying wheels press the pipeline and rotate along the movement direction to prevent the overall wire harness from scattering and the direction from deviating after the pipeline leaves the device. This structure is beneficial to controlling the relative position deviation between the free part of the pipeline extending out and the fixed part inside the device within a small range, which is beneficial to the standardization and safety control of welding operations.

[0041] The fixed pulley transmission component 3 includes a driving wheel 301 (fixed pulley), a dragging belt 302, a steering wheel group 303, and a transmission belt 304 (in this embodiment, the wheel-belt is described using a sprocket-chain, and other methods such as other chain-sprocket, belt-pulley, or synchronous belt-synchronous wheel can also be used). Each part is installed on both sides of the frame. There are two groups of driving wheels on the left and right and are installed at the front end of the frame. The driving wheel 301 is rotatably arranged on the frame 101, and the driving wheel 301 has a transmission effect (meshing) with the conveyor belt 501 of the pipeline conveying component 5, so the rotating driving wheel 301 drives the conveyor belt 501 to move forward or backward.

[0042] The drive belt 304 is a closed-loop chain. The annular drive belt 304 is rotatably arranged on the frame 101 through the steering wheel set 303. Specifically, the steering wheel set 303 includes four arranged in a rectangular distribution, and are divided into two groups of different sizes and arranged on the upper and lower sides at the front and rear ends of the frame, so that the drive belt 304 can rotate clockwise or counterclockwise inside the frame 101. The driving wheel 301 is connected to the steering wheel set 303 (one of the wheels) through the drag belt 302. The top end of the drive belt 304 is connected to the movable pulley sliding assembly 4. The drive belt 304 forms a closed-loop circuit around its rotation stroke. When the driving wheel rotates, the entire drive belt makes a cyclic motion, and at the same time, it can also drag the movable pulley sliding assembly 4 connected to the drive belt to move.

[0043] The movable pulley sliding assembly 4 includes a linear slide rail 401, a sliding wheel seat 402, and a driven wheel 403 (movable pulley). The linear slide rail 401 is arranged on the frame 101 in the front-rear direction and is installed on the slide rail seats 103 on both sides of the inner bottom of the frame. The sliding wheel seat 402 is slidably arranged on the linear slide rail 401 in the front-rear direction. The bottom of the sliding wheel seat is slidably matched with the linear slide rail through a linear slider, and the top is connected to the top end of the drive belt 304.

[0044] The driven wheel 403 is rotatably arranged on the sliding wheel seat 402. There are two groups of left and right driven wheels 403. The driven wheel 403 and the conveyor belt 501 of the pipeline conveying assembly 5 are wound around (meshed). When the drive belt 304 loop moves counterclockwise, the sliding wheel seat 402 moves forward along the linear slide rail from the rear under its drag, and at the same time, the driven wheel 403 rotates counterclockwise. Mechanical limit blocks are provided at both ends of the linear slide rail according to the length of the entire frame to prevent the driven wheel 403 from derailing.

[0045] The pipeline conveying assembly 5 includes a conveyor belt 501, a pipeline 502, pipeline clamping plates 503, an extension limit switch 504, and a recovery limit switch 505. The conveyor belt 501 includes two groups of left and right. The pipeline 502 is fixed on the conveyor belt 501 through a number of pipeline clamping plates 503. The clamping plates are evenly arranged along the entire length of the conveyor belt to keep the pipeline 502 fixed on the conveyor belt 501 in the same direction as the conveyor belt, and the pipeline and the conveyor belt move simultaneously during transportation.

[0046] The fixed ends 507 of the conveyor belt 501 and the pipeline 502 are both fixed on the bottom of the front end of the frame 101. The conveyor belt 501 is wound around the driven wheel 403 backward and then transmitted forward to act on the driving wheel 301. The free ends 506 of the conveyor belt 501 and the pipeline 502 extend out from the upper part of the front end of the frame 101. The extension limit switch 504 and the recovery limit switch 505 are respectively located at the front and rear extreme positions of the movable pulley sliding assembly 4.

[0047] When the drive belt 304 drags the driven wheel 403 to move forward from the back, the driven wheel 403 rotates while moving. The driving wheel 301 pulls the pipeline to extend at double the speed, and the extended length is also double the moving distance. At the front and rear ends of the moving range of the driven wheel 403, an extension limit switch and a retraction limit switch are respectively arranged. The driven wheel 403 can stop in time when it moves to the extreme retracting and extending positions, preventing collisions due to over-limitation.

[0048] The power assembly 6 includes a rotary motor 601, a rotary encoder 602, and a transmission main shaft 603. The rotary motor 601 can use energy forms such as electric, hydraulic, and pneumatic, and is installed and fixed on the outside of the frame. Its interior is hollow. Similarly, the power assembly 6 can use an electric motor as the power source. One end of the transmission main shaft 603 passes through the rotary motor 601, and the other end is installed on the other side of the frame and is supported by a rotary bearing. The rotary encoder 602 is installed outside the motor, and the detection mechanism is directly connected to the transmission main shaft. Similarly, other devices for detecting rotational speed and displacement can also be used. The transmission main shaft 603 passes through the driving wheel 301. When the rotary motor drives the transmission main shaft to rotate, the driving wheel 301 rotates synchronously. Since the driving wheel 301 is connected to the drive belt 304 and the conveyor belt 501 through a chain, the rotary motor plays a role in driving and controlling the entire device. At the same time, the rotary encoder monitors the rotational speed of the main shaft in real time, and matches the vehicle body moving speed and the wire releasing speed through the total control room of the rail welding vehicle.

[0049] According to the required pipeline length and the limited space of the rail welding vehicle, this application designs a retracting and extending device installed on the top of the vehicle, with an overall cuboid shape. To ensure that all pipelines are retracted and extended at a constant linear velocity during the retracting and extending process of the pipelines, a double-row chain single-power drive is designed. The pipelines are fixed in the middle of the two chains, and sprockets are used to drive the chains, so that the pipelines can passively follow the chains to achieve retracting and extending movements. One group of chains is a closed-loop drive chain, and one group is an open-loop conveyor chain. The entire length of the open-loop chain (conveyor chain) fits the pipeline. One end of it is fixed inside the device, and the other end is a free end that extends from the guiding assembly together with the pipeline end to the welding machine. When the closed-loop chain (drive chain) moves, it drags the driven sprocket of the open-loop chain (conveyor chain) to move. At the same time, the free end of the open-loop chain (conveyor chain) releases the extra length due to the movement of the driven sprocket, realizing the extension and release of the pipeline. During retraction, the driven sprocket moves in the reverse direction, and the released chain and pipeline are retracted and stored inside the device together.

[0050] The key points of this application:

[0051] 1. A method of separating the welding machine from the rail welding vehicle for construction is realized, which can effectively avoid the risk of the rail welding vehicle tipping over during the construction of railway high-level lines.

[0052] 2. By recovering and storing the pipelines required during the construction of the welding machine in a stable and orderly manner, the failure risk of pipeline disassembly is reduced, and the disassembly and assembly time is saved at the same time.

[0053] 3. By means of the rotary encoder installed at the main shaft, the speed of pipeline winding and unwinding can be effectively detected and controlled to adapt to the moving speed of the rail welding vehicle.

[0054] The foregoing basic examples of the present application and their respective further alternative examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in the present application. In the solution of the present application, each alternative example can be arbitrarily combined with any basic example and alternative example.

[0055] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pipeline retracting and unreeling device for a separated operation in railway rail welding construction, comprising a frame assembly (1), characterized in that: A fixed pulley drive assembly (3), a movable pulley sliding assembly (4) and a pipeline conveying assembly (5) are provided on the described frame assembly (1). The fixed pulley drive assembly (3) is fixedly arranged on the frame assembly (1). The movable pulley sliding assembly (4) is slidably arranged on the frame assembly (1) in the front-back direction. The fixed end of the pipeline conveying assembly (5) is fixed on the frame assembly (1). The pipeline conveying assembly (5) is wound around the movable pulley sliding assembly (4) backward and then drives forward on the fixed pulley drive assembly (3). The free end of the pipeline conveying assembly (5) extends out of the frame assembly (1).

2. The pipeline retracting and releasing device for the separated operation of railway rail welding construction according to claim 1, characterized in that: A pipeline guiding assembly (2) and a power assembly (6) are further provided on the described frame assembly (1). The pipeline conveying assembly (5) is arranged in the guiding channel of the pipeline guiding assembly (2). Both the pipeline guiding assembly (2) and the fixed pulley drive assembly (3) are located at the front end of the frame assembly (1). The pipeline guiding assembly (2) is relatively more forward than the fixed pulley drive assembly (3). The power assembly (6) drives the fixed pulley drive assembly (3), and the fixed pulley drive assembly (3) drives the movable pulley sliding assembly (4).

3. The pipeline retracting and deploying device for the separated operation in railway rail welding construction according to claim 2, characterized in that: The described power assembly (6) is a single power to drive the fixed pulley drive assembly (3) to move. The fixed pulley drive assembly (3) drives the movable pulley sliding assembly (4) to move through a transmission component. The transmission component is relatively fixed to the pipeline conveying assembly (5), so that the moving speed of the movable pulley sliding assembly (4) is consistent with the moving speed of the pipeline conveying assembly (5).

4. The pipeline retracting and unreeling device for the separated operation of railway rail welding construction according to claim 1, 2 or 3, characterized in that: The described frame assembly (1) includes a frame (101). The frame (101) is a cuboid structure with a hollow interior. The fixed pulley drive assembly (3), the movable pulley sliding assembly (4) and the pipeline conveying assembly (5) are located inside the frame (101). The power assembly (6) is located outside the frame (101). A lifting lug (102) is provided at the top of the frame (101), and a slide rail seat (103) for supporting the movable pulley sliding assembly (4) is provided at the bottom side inside the frame (101).

5. The pipeline retracting and deploying device for the separated operation of railway rail welding construction according to claim 2 or 3, characterized in that: The described pipeline guiding assembly (2) includes a corner transition block (201), a guiding correction block (202) and a positioning conveying wheel (203) arranged in sequence along the wire outlet direction. A guiding channel is formed inside the corner transition block (201), the guiding correction block (202) and the positioning conveying wheel (203).

6. The pipeline retracting and unreeling device for the separated operation of railway rail welding construction according to claim 1, 2 or 3, characterized in that: The described fixed pulley drive assembly (3) includes a driving wheel (301). The driving wheel (301) is rotatably arranged on the frame assembly (1). The driving wheel (301) has a driving effect on the conveyor belt (501) of the pipeline conveying assembly (5).

7. The pipeline retracting and deploying device for the separated operation of railway rail welding construction according to claim 6, characterized in that: The described fixed pulley drive assembly (3) further includes a dragging belt (302), a steering wheel group (303) and a transmission belt (304). The annular transmission belt (304) is rotatably arranged on the frame assembly (1) through the steering wheel group (303). The driving wheel (301) is connected to the steering wheel group (303) through the dragging belt (302). The top end of the transmission belt (304) is connected to the movable pulley sliding assembly (4).

8. The pipeline retracting and unreeling device for the separated operation in railway rail welding construction according to claim 1, 2 or 3, characterized in that: The described movable pulley sliding assembly (4) includes a linear slide rail (401), a sliding wheel seat (402), and a driven wheel (403). The linear slide rail (401) is arranged on the frame assembly (1). The sliding wheel seat (402) is slidably arranged on the linear slide rail (401) in the front-rear direction. The driven wheel (403) is rotatably arranged on the sliding wheel seat (402). The driven wheel (403) is wound around and acts on the conveyor belt (501) of the pipeline conveying assembly (5).

9. The pipeline retracting and unreeling device for the separated operation of railway rail welding construction according to claim 1, 2 or 3, characterized in that: The described pipeline conveying assembly (5) includes a conveyor belt (501) and a pipeline (502). The fixed ends (507) of the conveyor belt (501) and the pipeline (502) are both fixed on the frame assembly (1). The conveyor belt (501) is wound around and acts on the movable pulley sliding assembly (4) backward and then drives forward and acts on the fixed pulley transmission assembly (3). The pipeline (502) is fixed on the conveyor belt (501) in the same direction as the conveyor belt (501). The free ends (506) of the conveyor belt (501) and the pipeline (502) extend out of the frame assembly (1). The pipeline (502) is fixed on the conveyor belt (501) by a plurality of pipeline clamping plates (503). The pipeline conveying assembly (5) further includes an extension limit switch (504) and a retraction limit switch (505). The extension limit switch (504) and the retraction limit switch (505) are respectively located at the front and rear extreme positions of the movable pulley sliding assembly (4).

10. The pipeline retracting and deploying device for the separated operation in railway rail welding construction according to claim 2 or 3, characterized in that: The described power assembly (6) is a rotary motor (601) or an electric motor, and the speed detection device is a rotary encoder (602).

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