A cable laying equipment for urban rail transit

Abstract

A cable laying equipment for urban rail transit includes a tractor unit. The tractor unit is equipped with a drive unit for moving the tractor unit, a support unit for supporting the cable reel, a cable laying device for driving the cable reel to rotate, and a guide device for guiding the cable direction. The guide device includes a primary guide mechanism and a secondary guide mechanism arranged sequentially. During the rotation of the cable reel driven by the cable laying device, the cable passes through the primary and secondary guide mechanisms sequentially and extends out from the side of the tractor unit. This invention provides a cable laying equipment for urban rail transit that can automatically lay cables at a faster speed and requires less manpower.

Description

Technical Field

[0001] This invention relates to the field of rail transit construction technology, specifically to a cable laying equipment for urban rail transit. Background Technology

[0002] Urban rail transit is the backbone of urban public transportation, characterized by energy saving, land saving, large capacity, all-weather operation, low or no pollution, and safety. It is a green and environmentally friendly transportation system, particularly suitable for large and medium-sized cities. Existing urban rail transit systems mainly include subway systems, light rail systems, monorail systems, trams, maglev systems, automated guided tracks, and urban rapid transit systems. Among these, subway systems have gradually become the mainstay of urban rail transit and an important goal of urban construction and development due to their advantages of saving surface space, low noise, and minimal impact on other transportation facilities. Subway systems use electricity as their energy source, therefore requiring a large amount of cable during construction. Cables are typically mounted on racks installed on the tunnel walls. Currently, most subway cables are packaged and transported in cable reels. Because the cables are large, a single cable reel typically weighs around 6-7 tons, making it difficult to install the cables onto the racks. Existing technologies mostly rely on manual installation, requiring at least 20 workers to line up and lift each cable section simultaneously for successful installation—a very slow process that consumes significant human resources. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides cable laying equipment for urban rail transit, which can automatically lay cables at a faster speed and without requiring a large amount of manpower.

[0004] To achieve the above objectives, the specific solution adopted by the present invention is as follows: a cable laying equipment for urban rail transit, including a tractor, the tractor being equipped with a drive device for driving the tractor to move, a support device for supporting the cable reel, a cable laying device for driving the cable reel to rotate, and a guide device for guiding the direction of the cable, wherein the guide device includes a primary guide mechanism and a secondary guide mechanism arranged in sequence, and the cable extends out from the side of the tractor after passing through the primary guide mechanism and the secondary guide mechanism in sequence during the process of the cable laying device driving the cable reel to rotate.

[0005] As a further optimization of the cable laying vehicle for urban rail transit described above: the traction vehicle is also equipped with a control device and a power generation device. The control device is electrically connected to the drive device and the cable laying device, and the power generation device is electrically connected to the control device, the drive device and the cable laying device.

[0006] As a further optimization of the aforementioned cable laying vehicle for urban rail transit: the control device includes an operating console and a control cabinet.

[0007] As a further optimization of the cable laying vehicle for urban rail transit described above: the support device includes two brackets vertically fixed on the traction vehicle, the upper ends of the two brackets are rotatably connected to a rotating shaft, the cable reel is fixedly sleeved on the rotating shaft, and the rotating shaft is also threadedly connected to at least one limiter, which is located at the end of the cable reel.

[0008] As a further optimization of the cable laying vehicle for urban rail transit described above: a reinforcing member is also fixedly sleeved on the rotating shaft. The reinforcing member includes a plurality of reinforcing rods evenly distributed along the circumference of the rotating shaft. The reinforcing rods are fixedly connected to the cable reel, and a connecting rod is fixedly connected between two adjacent reinforcing rods.

[0009] As a further optimization of the cable laying vehicle for urban rail transit described above: the cable laying device includes a motor fixedly mounted on the traction vehicle, and the output shaft of the motor is fixedly connected to the rotating shaft via a pin.

[0010] As a further optimization of the cable laying vehicle for urban rail transit described above: the primary guiding mechanism includes two mounting plates fixedly installed on the side of the cable reel and a traction machine. The distance between the two mounting plates gradually decreases in the direction of approaching the inlet end of the traction machine. Multiple primary guide rollers are rotatably connected between the two mounting plates. The cable passes around the outside of the primary guide rollers and enters the inlet end of the traction machine.

[0011] As a further optimization of the cable laying vehicle for urban rail transit described above: the secondary guiding mechanism includes two vertically fixed lifting support units at the outlet end of the traction machine, two horizontal guide rollers are rotatably connected between the two lifting support units, two extension rods are horizontally fixed to each of the two lifting support units, and a vertical guide roller is rotatably connected between the two extension rods.

[0012] As a further optimization of the cable laying vehicle for urban rail transit described above: the extension rod is fixedly connected to a guide rod, and a guide roller is rotatably connected between the two guide rods corresponding to the two extension rods connected to the same lifting support unit, and the distance between the two guide rollers is greater than the distance between the two vertical guide rollers.

[0013] As a further optimization of the cable laying vehicle for urban rail transit described above: the tractor is detachably connected to several trailers, all trailers are arranged in sequence, and two adjacent trailers are detachably connected. The trailers are equipped with the support device, the cable laying device, and the guide device.

[0014] Beneficial effects: This invention can run directly on pre-constructed tracks and can automatically lay the track, with a faster laying speed and no need for a large number of manpower. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the overall structure of the tractor unit;

[0017] Figure 3 This is a schematic diagram of the overall structure of the guiding device;

[0018] Figure 4 This is a schematic diagram A of the overall structure of the support frame;

[0019] Figure 5 This is a schematic diagram (B) of the overall structure of the support frame;

[0020] Figure 6 yes Figure 5 A magnified view of a portion of the image;

[0021] Figure 7 A schematic diagram of the lifting support unit.

[0022] Figure Descriptions: 1-Tractor, 2-Drive Unit, 3-Cable Reel, 4-Support Device, 5-Cable Laying Device, 6-Guiding Device, 7-Control Device, 8-Generator, 9-Operating Panel, 10-Control Cabinet, 11-Bracket, 12-Shaft, 13-Reinforcing Rod, 14-Connecting Rod, 15-Motor, 16-Pin Shaft, 17-Support Plate, 18-Tractor, 19-First-Stage Guide Roller, 20-Lifting Support Unit, 21-Horizontal Guide Roller, 22-Extension Rod, 23-Vertical Guide Roller, 24-Guide Rod, 25-Guide Roller, 2 6-Trailer, 27-Bottom support rod, 28-Fixing plate, 29-Inclined support rod, 30-Vertical support rod, 31-Reinforcing rod, 32-Motor support rod, 33-Support platform, 34-Top support rod, 35-Support plate, 36-Support roller, 37-Shaft sleeve, 38-Reinforcing plate, 39-Tie rod, 40-Fastening seat, 41-Lifting support unit, 42-End plug, 43-Bolt, 44-Lifting rod, 45-Slot, 46-Connecting block, 47-Transition guide roller, 48-Mounting rod, 49-Guardrail, 50-Safety chain. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1 to 7A cable laying equipment for urban rail transit includes a tractor 1. The tractor 1 is equipped with a drive device 2 for moving the tractor 1, a support device 4 for supporting a cable reel 3, a cable laying device 5 for rotating the cable reel 3, and a guide device 6 for guiding the direction of the cable. The guide device 6 includes a primary guide mechanism and a secondary guide mechanism arranged in sequence. During the rotation of the cable reel 3 driven by the cable laying device 5, the cable passes through the primary guide mechanism and the secondary guide mechanism in sequence and then extends out from the side of the tractor 1.

[0025] In use, the tractor 1 is set on the rail transit track. The cable reel 3 is installed on the support device 4 by manual or mechanical hoisting. Then, the drive device 2 is started, which drives the tractor 1 to move. During the movement of the tractor 1, the cable laying device 5 drives the cable reel 3 to rotate. During the rotation of the cable reel 3, the cable is unloaded from the cable reel 3 and enters the guide device 6. The primary guide mechanism and the secondary guide mechanism guide the cable twice, and accurately control the direction of the cable to ensure a smooth laying process.

[0026] Because the track laying process precedes the electrical installation process in urban rail transit construction, this invention can operate directly on the already constructed tracks and can automatically lay the tracks at a faster speed without requiring a large amount of manpower.

[0027] The tractor unit 1 is also equipped with a control device 7 and a generator 8. The control device 7 is electrically connected to the drive unit 2 and the cable reel 5, and the generator 8 is electrically connected to the control device 7, the drive unit 2, and the cable reel 5. The control device 7 is used to control the drive unit 2 and the cable reel 5, mainly controlling the travel speed of the tractor unit 1 and the rotation speed of the cable reel 3 to match them, thereby ensuring that the entire cable reeling process can proceed smoothly. The generator 8 is used to provide electrical energy, thus eliminating the need for external power supply. The generator 8 can be a diesel generator. The drive unit 2 may include traveling wheels and a drive motor for driving the traveling wheels to rotate.

[0028] Specifically, the control device 7 includes an operating console 9 and a control cabinet 10. The operating console 9 and control cabinet 10 work together to enable manual control, ensuring timely stopping and safety in case of emergencies such as obstacles on the track. A guardrail 49 is installed on the side of the operating console 9, with a notch in the middle. A protective chain 50 is connected to the guardrail 49; one end of the protective chain 50 is fixedly connected to one side of the notch, and the other end is detachably connected to the other side of the notch, using a snap-fit ​​connection or similar method. The notch allows operators to get on and off the tractor 1. Once the operator is on the tractor 1, the protective chain 50 closes the notch to prevent accidental falls. The operating console 9 may include start / stop buttons and speed control handles, and the control cabinet 10 can be an existing electrical cabinet capable of controlling motors and other power equipment; these are conventional methods in the field and will not be described in detail here.

[0029] The specific structure of the support device 4 is as follows: The support device 4 includes two brackets 11 vertically fixed on the tractor 1. The upper ends of the two brackets 11 are rotatably connected to a rotating shaft 12. The cable reel 3 is fixedly sleeved on the rotating shaft 12. The rotating shaft 12 is also threadedly connected to at least one limiter, which is located at the end of the cable reel 3. The limiter specifically includes an internally threaded sleeve sleeved on the rotating shaft 12 and multiple handles fixedly connected to the outer wall of the internally threaded sleeve. The rotating shaft 12 is provided with a thread that matches the internally threaded sleeve. By rotating the internally threaded sleeve with the handles, the internally threaded sleeve moves along the rotating shaft 12, thereby limiting the cable reel 3 using the internally threaded sleeve and the handles.

[0030] Because the cable reel 3 is very heavy, its speed cannot be too high during the cable laying process to ensure stability. Therefore, it is difficult to maintain the rotation of the cable reel 3 using inertia. To ensure that the drive device 2 can stably drive the cable reel 3, the connection strength between the drive device 2 and the cable reel 3 needs to be improved. Therefore, a reinforcing member is fixedly sleeved on the rotating shaft 12. The reinforcing member includes multiple reinforcing rods 13 evenly distributed along the circumference of the rotating shaft 12. The reinforcing rods 13 are fixedly connected to the cable reel 3, and a connecting rod 14 is fixedly connected between two adjacent reinforcing rods 13. During the rotation of the rotating shaft 12, in addition to its fixed connection with the cable reel 3, it also applies force to the cable reel 3 through the reinforcing rods 13, thereby ensuring that the cable reel 3 can be driven to rotate stably. The connecting rod 14 is used to further strengthen the reinforcing rods 13 to prevent deformation of the reinforcing rods 13 due to excessive torque. The connecting rod 14 can be set in an arc shape, and the axis of the arc coincides with the axis of the rotating shaft 12.

[0031] The bracket 11 includes two vertically arranged support units, each including two parallel support plates 35. Multiple support rollers 36 are rotatably arranged between the two support plates 35. The end of a rotating shaft 12 is mounted on one of the support rollers 36. A bushing 37 is fixedly sleeved on the rotating shaft 12. A reinforcing rod 13 is fixedly connected to the bushing 37 and to the end of the cable reel 3. The rotating shaft 12 is mounted on the support rollers 36, thereby reducing friction during rotation and ensuring smooth rotation of the cable reel 3, thus allowing the cable to be unloaded from the cable reel 3.

[0032] The specific structure of the support unit is as follows: The support unit includes two vertical support rods 30 fixedly mounted on the tractor 1. A top support rod 34 is fixedly connected between the upper ends of the two vertical support rods 30. A support plate 35 is vertically fixed on the top support rod 34. An arc-shaped notch is opened in the middle of the support plate 35, and the rotating shaft 12 is set in the arc-shaped notch. The vertical support rods 30 are used to bear the weight of the cable reel 3. The top support rod 34 is used to install the support plate 35 and connect the upper ends of the two vertical support rods 30. Together with the tractor 1, it improves the stability of the vertical support rods 30. The arc-shaped notch can guide the rotating shaft 12 during the placement of the cable reel 3, ensuring that the rotating shaft 12 can be smoothly placed on the support roller 36, and can also limit the rotation of the rotating shaft 12, reducing the shaking that may occur during the rotation of the rotating shaft 12.

[0033] To further improve the stability of the vertical support rod 30 and thus ensure the stability of the cable reel 3, two bottom support rods 27 are horizontally fixed on the tractor 1. One end of the bottom support rod 27 is fixedly connected to the lower end of the vertical support rod 30, and the other end of the bottom support rod 27 is fixedly connected to the upper part of the vertical support rod 30 by an inclined support rod 29.

[0034] To improve the stability of the bottom support rod 27 and thus the stability of the vertical support rod 30, a fixing plate 28 is provided between the bottom support rod 27 and the tractor 1. The fixing plate 28 is L-shaped, with one half of the fixing plate 28 fixedly connected to the bottom support rod 27 and the other half of the fixing plate 28 fixedly connected to the tractor 1.

[0035] Because the connection strength between the rotating shaft 12 and the cable reel 3 is enhanced by multiple reinforcing rods 13, in order to ensure the stability of the cable reel 3 during rotation, all reinforcing rods 13 are evenly distributed along the circumference of the rotating shaft 12, so that the force on each reinforcing rod 13 is equal during the rotation of the cable reel 3, thus avoiding deformation of the reinforcing rods 13.

[0036] To further enhance the strength of the reinforcing rod 13 and prevent its deformation, a reinforcing plate 38 is fixedly connected to the reinforcing rod 13, and the reinforcing plate 38 is fixedly connected to the bushing 37.

[0037] The specific connection method between the reinforcing rod 13 and the cable reel 3 is as follows: a pull rod 39 is threaded through the reinforcing rod 13, and a fastening seat 40 corresponding to the pull rod 39 is fixedly installed on the cable reel 3. The pull rod 39 and the fastening seat 40 are threadedly connected. Alternatively, the pull rod 39 and the reinforcing rod 13 can be connected by threads.

[0038] To further enhance the strength of the reinforcing rod 13, an arc-shaped connecting rod 14 is fixedly connected between two adjacent reinforcing rods 13, and the axis of the arc coincides with the axis of the rotating shaft 12.

[0039] Each of the two vertical support rods 30 has a reinforcing rod 31 fixedly connected to its lower end. A motor support rod 32 is fixedly connected to each reinforcing rod 31 and vertically fixed to the tractor 1. A support platform 33 is fixedly connected between the two motor support rods 32 and the upper parts of the two vertical support rods 30. The motor 15 is fixedly mounted on the support platform 33. Using the motor support rods 32 to support the weight of the motor 15 reduces the load on the vertical support rods 30, thereby improving the stability of the entire support unit.

[0040] The specific structure of the wire-laying device 5 is as follows: The wire-laying device 5 includes a motor 15 fixedly mounted on the tractor 1. The output shaft of the motor 15 is fixedly connected to the rotating shaft 12 via a pin 16. More specifically, a slot extending along the length direction is provided on the output shaft of the motor 15. A corresponding insert block is integrally connected to the rotating shaft 12. After the insert block is inserted into the slot, the connection between the motor 15 and the rotating shaft 12 is achieved by the pin 16 passing through the side wall of the insert block and the slot.

[0041] The specific structure of the primary guiding mechanism is as follows: The primary guiding mechanism includes two mounting plates 17 fixedly mounted on the side of the cable reel 3 and a traction machine 18. The distance between the two mounting plates 17 gradually decreases in the direction approaching the inlet end of the traction machine 18. Multiple primary guide rollers 19 are rotatably connected between the two mounting plates 17. The cable passes around the outside of the primary guide rollers 19 and enters the inlet end of the traction machine 18. After the cable is detached from the cable reel 3, it first passes around all the primary guide rollers 19. The guide rollers 19 are used to spread the cable, thereby increasing the distance between the cable and the cable reel 19. This prevents the cable from pulling the cable reel 3 to move laterally during the detachment process, ensuring the stability of the cable reel 3. At the same time, the two mounting plates 17 can control the direction of cable movement, allowing the cable to smoothly enter the traction machine 18. Subsequently, the traction machine 18 pulls the cable, continuously feeding the cable detached from the cable reel 3 into the secondary guiding mechanism.

[0042] The specific structure of the secondary guiding mechanism is as follows: The secondary guiding mechanism includes two vertically fixed lifting support units 20 at the outlet end of the traction machine 18. Two horizontal guide rollers 21 are rotatably connected between the two lifting support units 20. Two extension rods 22 are horizontally fixed to each of the two lifting support units 20. A vertical guide roller 23 is rotatably connected between the two extension rods 22. The two horizontal guide rollers 21 are used to limit the cable in the vertical direction to prevent the cable from tilting upwards or downwards, so that the cable can smoothly extend from the side of the traction machine 1. After passing between the two horizontal guide rollers 21, the cable passes around the vertical guide roller 23. The vertical guide roller 23 can be used to adjust the extension direction of the cable so that the cable can smoothly enter the bracket.

[0043] The specific structure of the lifting support unit 20 is as follows: The lifting support unit 20 includes two vertically arranged columns 41. Vertically extending through slots are provided on the columns 41, and a lifting rod 44 is telescopically arranged in the through slots. A connecting block 46 is fixedly connected to the extended end of the lifting rod 44. One horizontal guide roller 21 is connected between the two connecting blocks 46, and the other horizontal guide roller 21 is connected between the two columns 41. After determining the cable size, the lifting rod 44 is moved to drive one of the horizontal guide rollers 21 up and down, thereby changing the distance between the two horizontal guide rollers 21. The position of the lifting rod 44 is fixed after the distance between the two horizontal guide rollers 21 is equal to or slightly greater than the outer diameter of the cable. After adjustment, this ensures that the cable can pass smoothly between the two horizontal guide rollers 21 and avoids a decrease in the limiting effect due to an excessively large distance between the two horizontal guide rollers 21. At the inlet end of the traction machine 18, a combination of the lifting support unit 20 and two horizontal guide rollers 21 can also be set to limit the cable in the vertical direction, ensuring that the cable can smoothly enter the traction machine 18.

[0044] The lifting rod 44 is fixed as follows: a plug 42 is fixedly connected to the column 41, and a bolt 43 passes through the plug 42. A slot 45 is provided on the lifting rod 44 to mate with the bolt 43. Before adjustment, the bolt 43 is rotated in the reverse direction to extend it out of the slot 45. After adjustment, the bolt 43 is rotated in the forward direction to enter it into the slot 45 and press the lifting rod 44 against the inner wall of the through groove, thereby fixing the position of the lifting rod 44.

[0045] To prevent excessive bending of the cable as it extends from the side of the tractor 1, which could cause excessive pressure on the vertical guide rollers 23 and the tractor 18, guide rods 24 are fixedly connected to the extension rods 22. Guide rollers 25 are rotatably connected between the two guide rods 24, which are connected to the two extension rods 22 on the same lifting support unit 20. The distance between the two guide rollers 25 is greater than the distance between the two vertical guide rollers 23. The guide rollers 25 further control the extension direction of the cable. After passing over the vertical guide rollers 23, the cable further passes over the guide rollers 25. Because the distance between the two guide rollers 25 is greater than the distance between the two vertical guide rollers 23, the bending radius of the cable can be increased, thus smoothly changing direction.

[0046] Two horizontally arranged transition guide rollers 47 can be added between the two horizontal guide rollers 21 and the two vertical guide rollers 23. The transition guide rollers 47 limit the cable in the vertical direction to ensure that the cable can bypass the vertical guide rollers 23. A mounting rod 48 can be fixedly connected between the two extension rods 22 connected to the same lifting support unit 20, and the transition guide rollers 47 are rotatably connected between the two mounting rods 48.

[0047] Considering that urban rail transit requires various types of cables, if each cable were laid individually using the tractor 1, it would require multiple repetitions, resulting in low efficiency. Therefore, the tractor 1 is detachably connected to several trailers 26, all of which are arranged sequentially, with adjacent trailers 26 being detachably connected. Each trailer 26 is equipped with a support device 4, a cable laying device 5, and a guide device 6. Using the trailers 26 allows for the simultaneous laying of multiple types of cables, expanding the applicability of this invention and improving its cable laying efficiency.

[0048] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those 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 invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cable laying equipment for urban rail transit, characterized in that: The tractor (1) is equipped with a drive device (2) for moving the tractor (1), a support device (4) for supporting the cable reel (3), a cable feeding device (5) for rotating the cable reel (3), and a guide device (6) for guiding the direction of the cable. The guide device (6) includes a primary guide mechanism and a secondary guide mechanism arranged in sequence. During the process of the cable feeding device (5) driving the cable reel (3) to rotate, the cable passes through the primary guide mechanism and the secondary guide mechanism in sequence and then extends out from the side of the tractor (1). The primary guiding mechanism includes two mounting plates (17) fixedly disposed on the side of the cable reel (3) and a traction machine (18). The distance between the two mounting plates (17) gradually decreases in the direction of approaching the inlet end of the traction machine (18). Multiple primary guide rollers (19) are rotatably connected between the two mounting plates (17). The cable passes around the outside of the primary guide rollers (19) and enters the inlet end of the traction machine (18). The secondary guide mechanism includes two vertically fixed lifting support units (20) at the outlet end of the traction machine (18). Two horizontal guide rollers (21) are rotatably connected between the two lifting support units (20). Two extension rods (22) are horizontally fixed to each of the two lifting support units (20). A vertical guide roller (23) is rotatably connected between the two extension rods (22). At the inlet end of the traction machine (18), a combination of lifting support unit (20) and two horizontal guide rollers (21) is also provided to limit the cable in the vertical direction.

2. The cable laying equipment for urban rail transit as described in claim 1, characterized in that: The tractor (1) is also equipped with a control device (7) and a power generation device (8). The control device (7) is electrically connected to the drive device (2) and the wire feeding device (5). The power generation device (8) is electrically connected to the control device (7), the drive device (2) and the wire feeding device (5).

3. The cable laying equipment for urban rail transit as described in claim 2, characterized in that: The control device (7) includes an operating console (9) and a control cabinet (10).

4. The cable laying equipment for urban rail transit as described in claim 1, characterized in that: The support device (4) includes two brackets (11) vertically fixed on the tractor (1). The upper ends of the two brackets (11) are rotatably connected to a rotating shaft (12). The cable reel (3) is fixedly sleeved on the rotating shaft (12). The rotating shaft (12) is also threadedly connected to at least one limiter, which is located at the end of the cable reel (3).

5. The cable laying equipment for urban rail transit as described in claim 4, characterized in that: A reinforcing member is also fixedly sleeved on the rotating shaft (12). The reinforcing member includes a plurality of reinforcing rods (13) evenly distributed along the circumference of the rotating shaft (12). The reinforcing rods (13) are fixedly connected to the cable reel (3), and a connecting rod (14) is fixedly connected between two adjacent reinforcing rods (13).

6. The cable laying equipment for urban rail transit as described in claim 4, characterized in that: The wire feeding device (5) includes a motor (15) fixedly mounted on the tractor (1), and the output shaft of the motor (15) is fixedly connected to the rotating shaft (12) via a pin (16).

7. The cable laying equipment for urban rail transit as described in claim 1, characterized in that: The extension rod (22) is fixedly connected to a guide rod (24), and a guide roller (25) is rotatably connected between the two guide rods (24) corresponding to the two extension rods (22) connected to the same lifting support unit (20). The distance between the two guide rollers (25) is greater than the distance between the two vertical guide rollers (23).

8. The cable laying equipment for urban rail transit as described in claim 1, characterized in that: The tractor (1) is detachably connected to several trailers (26). All the trailers (26) are arranged in sequence, and two adjacent trailers (26) are detachably connected. The trailers (26) are equipped with the support device (4), the cable laying device (5) and the guide device (6).

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