A cable efficient laying device for electric power engineering construction

By designing a cable laying device with a bidirectional threaded rod and a track structure, and utilizing the combination of an arc-shaped inclined block and a spring return rod, the problem of cable squeezing when the cable is stuck at a bend is solved, achieving efficient and safe cable laying and avoiding damage to the insulation layer.

CN122118565APending Publication Date: 2026-05-29SHANDONG HUIMING CONSTR ENG CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG HUIMING CONSTR ENG CO LTD
Filing Date
2026-03-03
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

During cable laying, especially when installed underground, cables may be subjected to excessive pressure due to being stuck at bends, which can damage the insulation layer. Existing equipment is not effective in preventing this.

Method used

An efficient cable laying device for power engineering construction was designed. It adopts a bidirectional threaded rod and crawler structure. Through the cooperation of arc-shaped inclined block and spring return rod, the crawler can achieve adaptive adjustment to avoid continuous compression when the cable is stuck. It includes a drive component, a synchronization component, a release mechanism and a limit mechanism to ensure that the cable is not continuously compressed at the bending position.

Benefits of technology

It effectively prevents the cable from being continuously squeezed when it gets stuck at a bend, maintains the integrity of the cable, reduces the risk of insulation damage, and improves the stability and safety of cable laying.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The application relates to the technical field of electric power engineering, and discloses a cable efficient laying device for electric power engineering construction, which comprises a support frame, the top of the support frame is provided with two placing tables, the inner wall of the support frame is fixedly connected with two fixed rods, the outer walls of the two fixed rods are slidably connected with the inner walls of the two placing tables, the rotating cylinder is driven to rotate by starting two motors, the arc-shaped inclined surface block and the spring reset rod are rotated, the driving wheel and the caterpillar belt are pushed to rotate, and the cable is moved; when the bending position of the cable is stuck, the rotating resistance of the caterpillar belt is increased, the arc-shaped inclined surface block is separated from the arc-shaped inclined surface groove through a synchronous assembly, the continuous pushing force of the caterpillar belt on the cable is reduced, the continuous rotation of the caterpillar belt on the cable is effectively prevented when the cable is stuck, the continuous pushing force of the caterpillar belt on the cable is prevented from being continuously applied to the cable, the bending position of the cable is prevented from being continuously subjected to the overstrong extrusion force, the damage of the insulating layer of the cable is prevented, and the integrity of the cable during laying is ensured.
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Description

Technical Field

[0001] This invention relates to the field of power engineering equipment technology, specifically to a high-efficiency cable laying device for power engineering construction. Background Technology

[0002] Cables are a general term for items such as optical cables and electrical cables. Cables have many uses, mainly for control installation, connecting equipment, and transmitting power. They are a common and indispensable item in daily life. During the cable laying process, laying devices are usually used. These are mechanical devices for automatic cable laying, which replace traditional manual or semi-mechanized operations, significantly improving efficiency, reducing labor costs and construction risks.

[0003] In cities, cables are mostly installed underground, often using a dual-track conveyor to hold the cables and drive them continuously to the designated location. However, underground installations may involve complex movement paths, and the cables may get stuck at bends during the laying process. In this case, the continuous thrust of the dual-track conveyor will be converted into compressive force on the cables, subjecting them to strong bending stress, which may damage the internal insulation layer of the cables. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides an efficient cable laying device for power engineering construction, including a support frame, two placement platforms on the top of the support frame, four connection holes on the inner wall of the support frame, the four connection holes being in pairs, and a fixing rod fixedly connected to the inner wall of each pair of connection holes; two guide holes on the inner wall of each of the two placement platforms, the four guide holes being in pairs, and the inner wall of each pair of guide holes being slidably connected to the outer wall of the two fixing rods. The inner wall of the support frame has two rotating holes, and the inner walls of the two rotating holes are rotatably connected to a double-threaded rod. The inner walls of the two placement platforms are all provided with threaded holes, and the outer walls of the double-threaded rods are threadedly connected to the inner walls of the two threaded holes. The inner walls of the two placement platforms are all provided with two rotating holes, and the inner walls of the four rotating holes are all rotatably connected to a drive wheel. The inner walls of the two placement platforms are all provided with open slots, and the inner walls of the two open slots are all rotatably connected to a track. The outer walls of the four drive wheels are fixedly connected with several gear teeth. The four drive wheels are in pairs. The inner walls of the two tracks are fixedly connected with several transmission teeth. The transmission teeth of the two tracks are meshed with the gear teeth on the outer walls of the two sets of drive wheels. The bottom of the two platforms contains the same parts. The two drive wheels on the right side contain the same internal parts. The cable laying mechanism is fixedly installed at the bottom of the placement platform and is used for laying cables; The release mechanism is rotatably mounted on the inner wall of the placement platform to release stuck cables. A limiting mechanism is fixedly installed at the bottom of the placement platform and is used for the extrusion laying mechanism; In use, the construction workers rotate the double-threaded rod to move the two placement platforms away from each other, increasing the distance between them. Then, the cable to be laid is placed between the two placement platforms. After placement, the double-threaded rod is rotated in the opposite direction to move the two placement platforms closer together, causing the track to squeeze the cable and clamp it.

[0005] Preferably, the laying mechanism includes: The drive component is fixedly installed at the bottom of the placement platform; A synchronization component is slidably mounted on the inner wall of the right drive wheel; After the cable is clamped, the drive wheel and track rotate through the drive component and the synchronization component to move the cable. When the cable is stuck, the conveying resistance of the track increases, and the synchronization component has difficulty driving the drive wheel to rotate. If the synchronization component continues to rotate, the drive wheel will squeeze the synchronization component, causing the two to separate and the track to stop rotating.

[0006] Preferably, the loosening mechanism includes: A rotating assembly is slidably mounted on the inner wall of the placement platform via a sliding member. The sliding component includes a sliding hole 1 formed in the inner wall of the placement platform, and a rotating ring is slidably connected to the inner wall of the sliding hole 1. A reversing component is rotatably mounted on the outer wall of the right drive wheel via a rotating component. The rotating component includes a sloping connecting ring rotatably connected to the outer wall of the right drive wheel; When the synchronizing component separates from the drive wheel, it causes the rotating component to descend, squeezing the reverse component to rotate, which in turn causes the drive wheel on the right to rotate in the opposite direction, thus loosening the cable.

[0007] Preferably, the limiting mechanism includes: The extrusion assembly is fixedly mounted at the bottom of the placement platform via connectors; The connector includes two fixed plates that are fixedly connected to the bottom of the placement platform; The lifting assembly is fixedly installed at the bottom of the placement platform by means of support components; The support includes four limiting rods fixedly connected to the bottom of the placement platform, and four inclined panels fixedly connected to the top of the support frame; As the rotating component descends, it is squeezed by the compression component, increasing the resistance to the upward movement of the rotating component. The lifting component further increases the squeezing force on the synchronizing component.

[0008] Preferably, the drive assembly includes a motor fixedly connected to the bottom of the placement platform, a rotating cylinder is provided at the bottom of the placement platform, and the top of the motor's output end is fixedly connected to the bottom of the rotating cylinder.

[0009] Preferably, the synchronization component includes three arc-shaped inclined grooves opened on the inner wall of the right drive wheel, three arc-shaped sliding grooves opened on the inner wall of the rotating cylinder, arc-shaped inclined blocks slidably connected to the inner walls of the three arc-shaped sliding grooves, three sliding holes II opened on the inner wall of the rotating cylinder, spring return rods slidably connected to the inner walls of the three sliding holes II, and sealing rings I fixedly connected to the outer walls of the three spring return rods. The top of each of the three spring reset rods is fixedly connected to a mounting block, the top of each of the three mounting blocks is fixedly connected to the bottom of each of the three arc-shaped inclined blocks, and the outer wall of each of the three arc-shaped inclined blocks is slidably connected to the inner wall of each of the three arc-shaped inclined grooves. In this process, after the track clamps the cable, the two motors are started to drive the rotating cylinder on the front to rotate counterclockwise, and the rotating cylinder on the back to rotate clockwise. The rotating cylinder will drive the arc-shaped inclined block and the spring return rod to rotate. Since the arc-shaped inclined block is in contact with the arc-shaped inclined groove, and the resistance of the cable is small at this time. As the curved inclined block rotates, it drives the drive wheel on the right to rotate, which in turn drives the track to rotate, thus moving the cable and laying it. When the cable is laid underground and gets stuck at a bend, the rotational resistance of the track increases. When the curved inclined block pushes the drive wheel to rotate, it also encounters a large resistance force. At this time, the curved inclined block has difficulty pushing the drive wheel to rotate. As the curved inclined block continues to rotate, the inclined surface of the curved inclined block will be squeezed and lowered by the inclined surface of the curved inclined groove. The curved ramp block compresses the spring return rod, causing the spring return rod to accumulate rebound force. As the curved ramp block continues to descend, it will separate from the curved ramp groove, reducing the continuous pushing force of the track on the cable. This effectively prevents the cable from being stuck and the track from continuously rotating, which would continuously apply pushing force to the cable and cause excessive pressure on the cable bending point, easily damaging the cable insulation layer. This ensures the integrity of the cable during installation.

[0010] Preferably, the rotating assembly includes an annular groove formed on the inner wall of the rotating ring, a compression ring rotatably connected to the inner wall of the annular groove, the inner wall of the compression ring being slidably connected to the outer wall of the right drive wheel, and the inner wall of the rotating ring being fixedly connected to the side walls of the three mounting blocks. When the curved inclined block and the spring return rod descend, they will drive the rotating ring to descend, and the rotating ring will drive the squeezing ring to descend.

[0011] Preferably, the reverse component includes four arc-shaped grooves formed on the inner wall of the right drive wheel, and spring arc-shaped blocks are slidably connected to the inner walls of the four arc-shaped grooves. The side of the four spring arc-shaped blocks closest to the outer wall of the right drive wheel is fixedly connected to the inner wall of the inclined connecting ring. When the drive wheel stops rotating and the compression ring descends, the arc surface at the bottom of the compression ring presses against the inclined surface of the inclined connecting ring. This causes the inclined connecting ring on the front to rotate clockwise, while the inclined connecting ring on the back rotates counterclockwise. This causes the spring arc block to rotate, resulting in compression and the accumulation of rebound force until the spring arc block contacts the other end of the arc-shaped groove. The spring arc block then pushes the drive wheel on the front to rotate counterclockwise, while the drive wheel on the back rotates clockwise. This allows the track to transport the cable in the opposite direction for a distance, reducing the continuous compression force on the cable bending points. This effectively prevents the cable from being subjected to prolonged compression at bending points during inspections, keeping the cable in a looser state and further preventing cable damage.

[0012] Preferably, the extrusion assembly includes two inclined arc-shaped rings disposed at the bottom of the placement platform. An extension rod is fixedly connected to the side of each of the two inclined arc-shaped rings away from the outer wall of the rotating cylinder. The outer walls of the two extension rods are slidably connected to the inner walls of the two fixed plates. Compression springs are fitted on the outer walls of both extension rods, and two compression frames are installed at the bottom of the placement platform. The inner walls of the two compression frames are slidably connected to the outer walls of the two extension rods. During the descent of the rotating ring, when the inclined surface of the rotating ring contacts the inclined surface of the inclined arc ring, it will squeeze the inclined arc ring towards the fixed plate. The inclined arc ring will squeeze the compression spring, causing the compression spring to accumulate elastic potential energy. As the rotating ring continues to descend, when the inclined surface of the rotating ring separates from the inclined surface of the inclined arc ring, the elastic force of the compression spring will squeeze the outer wall of the rotating ring, increasing the moving resistance of the rotating ring. During the continuous rotation of the rotating cylinder, when the arc inclined block aligns with the arc inclined groove again; The spring return rod releases its rebound force, causing the spring return rod, the curved inclined block, and the rotating ring to rise back to their original positions. By increasing the moving resistance of the rotating ring, its rising speed is slowed down, making it difficult for the curved inclined block to enter the curved inclined groove in time. This effectively prevents the cable from being in a relatively loose state. After the curved inclined block rises quickly and enters the curved inclined groove, it will push the drive wheel to rotate again, and the track will transport the cable again. This can easily cause the cable to get stuck again, resulting in the cable switching between stuck and loose states repeatedly, which can easily cause cable fatigue damage.

[0013] Preferably, the lifting assembly includes two push frames rotatably disposed at the bottom of the placement platform, four limit rods in pairs, two sliding holes in the inner wall of each of the two push frames, the four sliding holes in pairs, and the inner wall of each pair of sliding holes in pairs slidingly connected to the outer wall of each pair of limit rods. The inner wall of the rotating cylinder is provided with a pressure groove, and the outer wall of the spring piston plate is slidably connected to the inner wall of the pressure groove. The top of the two push frames is rotatably connected with a connecting rod. The inner walls of the two connecting rods are rotatably connected to the bottom of the two extrusion frames. The inner walls of the two push frames are provided with semi-circular grooves, and the inner walls of the two semi-circular grooves are rotatably connected with ball bearings. The outer walls of the spring piston plate are fixedly connected with two sealing rings. In this process, when the construction worker rotates the bidirectional threaded rod to move the two placement platforms away from each other and needs to clamp a larger cable, the placement platform will move towards the inclined plate. This will cause the curved surface of the push frame to contact the inclined surface of the inclined plate, and the push frame will be compressed and move upward. The ball bearings on the inner wall of the push frame will contact the bottom of the spring piston plate, thereby pushing the spring piston plate upward. This allows the spring piston plate to accumulate rebound force. As the spring piston plate rises, it will compress the space inside the rotating cylinder, compressing the gas inside the rotating cylinder. The gas will compress the spring return rod, increasing the descent resistance of the curved inclined block. This will make the curved inclined block fit more tightly with the curved inclined groove, increasing the pushing force of the curved inclined block on the drive wheel. This effectively prevents the separation of the curved inclined block and the curved inclined groove when the track conveyor is used to transport larger cables. The cables are heavier and require more thrust to move, which can easily cause the cable to move and make it difficult to move the cable.

[0014] The present invention has the following beneficial effects: (1) When using this invention, the two motors are started to drive the rotating cylinder to rotate, so that the arc-shaped inclined block and the spring return rod rotate. Since the arc-shaped inclined block is in contact with the arc-shaped inclined groove, and the resistance of the cable is small at this time, the drive wheel and the track will be driven to rotate to transport the cable. When the cable is laid underground, the bending position of the cable is stuck, the rotation resistance of the track will increase. When the arc-shaped inclined block drives the drive wheel to rotate, it will also be subject to a large blocking force. The synchronization component separates the arc-shaped inclined block from the arc-shaped inclined groove, reducing the continuous pushing force of the track on the cable. This effectively prevents the track from continuously rotating when the cable is stuck, which will continuously apply pushing force to the cable, causing the bending position of the cable to be subjected to excessive squeezing force, which can easily damage the insulation layer of the cable, thereby ensuring the integrity of the cable during laying.

[0015] (2) When the drive wheel rotates, the spring arc block will drive the inclined connecting ring to rotate, and the inclined surface of the inclined connecting ring will push the compression ring to rotate. When the arc inclined block and the spring reset rod descend, they will drive the rotating ring to descend, and the rotating ring will drive the compression ring to descend, so that the arc surface at the bottom of the compression ring will press the inclined surface of the inclined connecting ring. Through the reverse component, the inclined connecting ring will press the drive wheel to rotate in the opposite direction, so that the track will transport the cable in the opposite direction for a distance, reducing the continuous compression force on the cable bending position. This effectively prevents the cable bending position from being subjected to a long compression time during the inspection process, which requires a long time for construction personnel, thus keeping the cable in a relatively loose state and further preventing cable damage.

[0016] (3) During the descent of the rotating ring, when the inclined surface of the rotating ring contacts the inclined surface of the inclined arc ring, it will squeeze the inclined arc ring to move towards the fixed plate. The inclined arc ring will squeeze the compression spring, causing the compression spring to accumulate elastic potential energy. As the rotating ring continues to descend, the moving resistance of the rotating ring will be increased by the squeezing component, which will slow down the rising speed of the rotating ring and the arc inclined block, making it difficult for the arc inclined block to enter the arc inclined groove in time. This effectively prevents the cable from being in a relatively loose state. After the arc inclined block rises quickly and enters the arc inclined groove, it will push the drive wheel to rotate again, and the track will transport the cable to move again, which can easily cause the cable to be stuck again. This causes the cable to switch between being stuck and loose, which can easily cause cable fatigue damage.

[0017] (4) When the construction personnel rotate the bidirectional threaded rod to move the two placement platforms away from each other and need to clamp a larger cable, the placement platform will move towards the inclined plate, which will cause the push frame to be squeezed and move upward, pushing the spring piston plate to rise, which will compress the gas in the rotating cylinder. The gas will squeeze the spring return rod, increase the descent resistance of the arc-shaped inclined block, and increase the pushing force of the arc-shaped inclined block on the drive wheel. This effectively prevents the cable from being too heavy when the track conveys a larger cable, requiring a greater pushing force to move the cable, which may cause the arc-shaped inclined block to separate from the arc-shaped inclined groove, making it difficult for the cable to move. In addition, when the push frame rises, the lifting component enhances the squeezing force of the inclined arc ring on the rotating ring, which effectively prevents the insufficient squeezing force of the inclined arc ring on the rotating ring when the spring return rod is lowered and reset again. The compressed gas in the rotating cylinder will push the spring return rod to rise quickly, making it difficult for the rotating ring to rise slowly. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a cross-sectional schematic diagram of the placement platform of the present invention; Figure 4 This is a cross-sectional schematic diagram of the rotating cylinder of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram showing the separation of the drive wheel and the arc-shaped inclined block in this invention; Figure 7 This is a top sectional view of the drive wheel of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point B in the middle; Figure 9 This is a schematic cross-sectional view of the push frame of the present invention; Figure 10 This is a schematic cross-sectional view of the rotating ring of the present invention; Figure 11 For the present invention Figure 10 Enlarged view of point C in the middle; Figure 12 This is a schematic diagram of the exploded structure of the reverse component of the present invention; Figure 13 This is a schematic diagram of the internal structure of the rotating cylinder of the present invention; Figure 14 This is a cross-sectional schematic diagram of the support frame of the present invention; Figure 15 This is a schematic diagram of the support frame and placement platform structure of the present invention.

[0020] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Laying mechanism; 11. Drive assembly; 12. Synchronization assembly; 13. Support frame; 14. Placement platform; 15. Fixing rod; 16. Bidirectional threaded rod; 17. Track; 18. Drive wheel; 111. Motor; 112. Rotating cylinder; 121. Arc-shaped inclined groove; 122. Arc-shaped inclined block; 123. Spring return rod; 2. Release mechanism; 21. Rotating assembly; 22. Reverse assembly; 211. Rotating ring; 212. Extrusion ring; 221. Inclined connecting ring; 222. Arc-shaped slide; 223. Spring arc-shaped block; 3. Limiting mechanism; 31. Extrusion assembly; 32. Lifting assembly; 311. Fixing plate; 312. Inclined arc-shaped ring; 313. Compression spring; 314. Extrusion frame; 321. Spring piston plate; 322. Limiting rod; 323. Pushing frame; 324. Inclined panel; 325. Connecting rod. Detailed Implementation

[0021] 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.

[0022] Example 1, please refer to Figures 1-4 The present invention is an efficient cable laying device for power engineering construction, including a support frame 13. The top of the support frame 13 is provided with two placement platforms 14. The inner wall of the support frame 13 has four connecting holes, which are arranged in pairs. The inner walls of the two sets of connecting holes are fixedly connected with fixing rods 15. The inner walls of the two placement platforms 14 each have two guide holes, which are arranged in pairs. The inner walls of the two sets of guide holes are slidably connected to the outer walls of the two fixing rods 15. The inner wall of the support frame 13 has two rotating holes, and the inner walls of the two rotating holes are rotatably connected to a bidirectional threaded rod 16. The inner walls of the two placement platforms 14 are each provided with threaded holes, and the outer walls of the bidirectional threaded rod 16 are threadedly connected to the inner walls of the two threaded holes. The inner walls of the two placement platforms 14 are each provided with two rotating holes, and the inner walls of the four rotating holes are each rotatably connected to a drive wheel 18. The inner walls of the two placement platforms 14 are each provided with an opening slot, and the inner walls of the two opening slots are each rotatably connected to a track 17. The outer walls of the four drive wheels 18 are fixedly connected with several gear teeth. The four drive wheels 18 are in pairs. The inner walls of the two tracks 17 are fixedly connected with several transmission teeth. The transmission teeth of the two tracks 17 are meshed with the gear teeth on the outer walls of the two sets of drive wheels 18 through the transmission teeth on their inner walls. The bottom of the two placement platforms 14 contains the same parts. The interior of the two drive wheels 18 on the right side contains the same parts. Cable laying mechanism 1 is fixedly installed at the bottom of the placement platform 14 and is used for laying cables; The loosening mechanism 2 is rotatably mounted on the inner wall of the placement platform 14 to loosen the stuck cable; Limiting mechanism 3 is fixedly installed at the bottom of the placement platform 14 and is used to compress the laying mechanism 1; In use, the construction workers rotate the bidirectional threaded rod 16 to move the two placement platforms 14 away from each other, increasing the distance between the two placement platforms 14. Then, the cable to be laid is placed between the two placement platforms 14. After placement, the bidirectional threaded rod 16 is rotated in the opposite direction to move the two placement platforms 14 closer to each other, so that the track 17 squeezes the cable and clamps it.

[0023] Laying mechanism 1 includes: Drive component 11 is fixedly installed at the bottom of the placement platform 14; Synchronization component 12 is slidably disposed on the inner wall of the right drive wheel 18; After the cable is clamped, the drive wheel 18 and the track 17 are rotated by the drive component 11 and the synchronization component 12 to move the cable. When the cable is stuck, the conveying resistance of the track 17 will increase, and the synchronization component 12 will have difficulty driving the drive wheel 18 to rotate. As the synchronization component 12 continues to rotate, the drive wheel 18 will squeeze the synchronization component 12, causing the two to separate and the track 17 to stop rotating.

[0024] The loosening mechanism 2 includes: Rotating component 21 is slidably disposed on the inner wall of the placement platform 14 via a sliding member; The sliding component includes a sliding hole 1 opened in the inner wall of the placement platform 14, and a rotating ring 211 is slidably connected to the inner wall of the sliding hole 1. Reverse assembly 22 is rotatably mounted on the outer wall of the right drive wheel 18 via a rotating component; The rotating component includes a sloping connecting ring 221 that is rotatably connected to the outer wall of the right drive wheel 18; When the synchronization component 12 separates from the drive wheel 18, it will cause the rotating component 21 to descend, squeezing the reverse component 22 to rotate, causing the drive wheel 18 on the right side to rotate in the opposite direction and loosen the cable.

[0025] Limiting mechanism 3 includes: The extrusion assembly 31 is fixedly mounted on the bottom of the placement platform 14 via a connector; The connectors include two fixing plates 311 that are fixedly connected to the bottom of the placement platform 14; Lifting component 32 is fixedly installed at the bottom of the placement platform 14 by a support member; The support includes four limiting rods 322 fixedly connected to the bottom of the placement platform 14, and four inclined panels 324 fixedly connected to the top of the support frame 13. When the rotating component 21 descends, it will be squeezed by the squeezing component 31, increasing the resistance to the upward movement of the rotating component 21. The lifting component 32 will increase the squeezing force on the synchronizing component 12.

[0026] Example 2, please refer to Figures 3-15 The present invention is an efficient cable laying device for power engineering construction. Based on Example 1, the drive component 11 includes a motor 111 fixedly connected to the bottom of the placement platform 14. A rotating cylinder 112 is provided at the bottom of the placement platform 14. The top of the output end of the motor 111 is fixedly connected to the bottom of the rotating cylinder 112.

[0027] The synchronization component 12 includes three arc-shaped inclined grooves 121 opened on the inner wall of the right drive wheel 18, three arc-shaped sliding grooves opened on the inner wall of the rotating cylinder 112, arc-shaped inclined blocks 122 slidably connected to the inner walls of the three arc-shaped sliding grooves, three sliding holes 2 opened on the inner wall of the rotating cylinder 112, spring return rods 123 slidably connected to the inner walls of the three sliding holes 2, and sealing rings 1 fixedly connected to the outer walls of the three spring return rods 123. The top of each of the three spring reset rods 123 is fixedly connected to a mounting block, the top of each of the three mounting blocks is fixedly connected to the bottom of each of the three arc-shaped inclined blocks 122, and the outer wall of each of the three arc-shaped inclined blocks 122 is slidably connected to the inner wall of each of the three arc-shaped inclined grooves 121. In this process, after the track 17 clamps the cable, the two motors 111 are started to drive the rotating cylinder 112 located on the front to rotate counterclockwise, and the rotating cylinder 112 located on the back to rotate clockwise. The rotating cylinder 112 will drive the arc-shaped inclined block 122 and the spring return rod 123 to rotate. Since the arc-shaped inclined block 122 is in contact with the arc-shaped inclined groove 121, and the resistance of the cable is small at this time; During the rotation of the curved inclined block 122, the drive wheel 18 located on the right side will be driven to rotate, which in turn drives the track 17 to rotate, thereby transporting the cable and laying the cable. When the cable is laid underground and the bending point of the cable is stuck, the rotation resistance of the track 17 will increase. When the curved inclined block 122 pushes the drive wheel 18 to rotate, it will also be subject to a large resistance force. At this time, the curved inclined block 122 has difficulty pushing the drive wheel 18 to rotate. During the continuous rotation of the curved inclined block 122, the inclined surface of the curved inclined block 122 will be squeezed and lowered by the inclined surface of the curved inclined groove 121. The curved inclined block 122 will compress the spring return rod 123, causing the spring return rod 123 to accumulate rebound force. As the curved inclined block 122 continues to descend, it will separate from the curved inclined groove 121, reducing the continuous pushing force of the track 17 on the cable. This effectively prevents the track 17 from continuously rotating and applying a pushing force to the cable when the cable is stuck, which would cause the cable bending position to be subjected to excessive pressure and easily damage the cable insulation layer, thus ensuring the integrity of the cable during installation.

[0028] The rotating assembly 21 includes an annular groove formed on the inner wall of the rotating ring 211. A compression ring 212 is rotatably connected to the inner wall of the annular groove. The inner wall of the compression ring 212 is slidably connected to the outer wall of the right drive wheel 18. The inner wall of the rotating ring 211 is fixedly connected to the side walls of the three mounting blocks. When the curved inclined block 122 and the spring return rod 123 descend, they will drive the rotating ring 211 to descend, and the rotating ring 211 will drive the compression ring 212 to descend.

[0029] The reverse component 22 includes four arc-shaped grooves 222 opened on the inner wall of the right drive wheel 18. Spring arc blocks 223 are slidably connected to the inner walls of the four arc-shaped grooves 222. The side of the four spring arc blocks 223 near the outer wall of the right drive wheel 18 is fixedly connected to the inner wall of the inclined connecting ring 221. When the drive wheel 18 stops rotating and the compression ring 212 descends, the arc-shaped surface at the bottom of the compression ring 212 compresses the inclined surface of the connecting ring 221, as shown in the image. Figure 5 As shown in position F, the inclined connecting ring 221 on the front side will be squeezed and rotated clockwise, causing the inclined connecting ring 221 on the back side to rotate counterclockwise. This will cause the spring arc block 223 to rotate, compressing the spring arc block 223 and accumulating rebound force until the spring arc block 223 contacts the other end of the arc groove 222. Figure 8 As shown in position G, the spring arc block 223 will push the front drive wheel 18 to rotate counterclockwise, causing the rear drive wheel 18 to rotate clockwise. This allows the track 17 to transport the cable in the opposite direction for a distance, reducing the continuous squeezing force on the cable bending point. This effectively prevents the cable bending point from being subjected to prolonged squeezing time during the inspection process, thus keeping the cable in a relatively loose state and further preventing cable damage.

[0030] The extrusion assembly 31 includes two inclined arc rings 312 disposed at the bottom of the placement platform 14. An extension rod is fixedly connected to the side of the two inclined arc rings 312 away from the outer wall of the rotating cylinder 112. The outer walls of the two extension rods are slidably connected to the inner walls of the two fixed plates 311. A compression spring 313 is fitted on the outer wall of each of the two extension rods. Two extrusion frames 314 are provided at the bottom of the placement platform 14. The inner walls of the two extrusion frames 314 are slidably connected to the outer walls of the two extension rods. During the descent of the rotating ring 211, when the inclined surface of the rotating ring 211 contacts the inclined surface of the inclined arc ring 312, it will squeeze the inclined arc ring 312 to move towards the fixed plate 311. The inclined arc ring 312 will squeeze the compression spring 313, causing the compression spring 313 to accumulate elastic potential energy. As the rotating ring 211 continues to descend, when the inclined surface of the rotating ring 211 separates from the inclined surface of the inclined arc ring 312, the elastic force of the compression spring 313 will squeeze the outer wall of the rotating ring 211, increasing the moving resistance of the rotating ring 211. During the continuous rotation of the rotating cylinder 112, when the arc inclined block 122 aligns with the arc inclined groove 121 again; The spring return rod 123 will release its rebound force, causing the spring return rod 123, the arc-shaped inclined block 122, and the rotating ring 211 to rise back to their original positions. By increasing the moving resistance of the rotating ring 211, its rising speed will be slowed down, making it difficult for the arc-shaped inclined block 122 to enter the arc-shaped inclined groove 121 in time. This effectively prevents the cable from being in a relatively loose state. After the arc-shaped inclined block 122 rises quickly into the arc-shaped inclined groove 121, it will push the drive wheel 18 to rotate again, and the track 17 will transport the cable to move again. This can easily cause the cable to get stuck again, resulting in the cable switching between stuck and loose states repeatedly, which can easily cause cable fatigue and damage.

[0031] The lifting assembly 32 includes two push frames 323 rotatably mounted at the bottom of the placement platform 14, and four limit rods 322 in pairs. The inner walls of the two push frames 323 each have two sliding holes 3, and the four sliding holes 3 are in pairs. The inner walls of the two sets of sliding holes 3 are slidably connected to the outer walls of the two sets of limit rods 322. The inner wall of the rotating cylinder 112 is provided with a pressure groove, and the outer wall of the spring piston plate 321 is slidably connected to the inner wall of the pressure groove. The top of the two push frames 323 are rotatably connected with connecting rods 325. The inner walls of the two connecting rods 325 are rotatably connected to the bottom of the two extrusion frames 314. The inner walls of the two push frames 323 are provided with semi-circular grooves, and the inner walls of the two semi-circular grooves are rotatably connected with ball bearings. The outer wall of the spring piston plate 321 is fixedly connected with two sealing rings. When the construction worker rotates the bidirectional threaded rod 16 to move the two placement platforms 14 away from each other, and needs to clamp a larger cable, the placement platform 14 will move towards the inclined plate 324, causing the arc surface of the push frame 323 to contact the inclined surface of the inclined plate 324. The push frame 323 will then be compressed and move upwards. The ball bearings on the inner wall of the push frame 323, such as... Figure 9 As shown in the position of H, it will contact the bottom of the spring piston plate 321, thereby pushing the spring piston plate 321 to rise, allowing the spring piston plate 321 to accumulate rebound force. The rise of the spring piston plate 321 will compress the space inside the rotating cylinder 112, causing the gas inside the rotating cylinder 112 to be compressed. The gas will compress the spring return rod 123, increasing the descending resistance of the arc-shaped inclined block 122, thereby making the arc-shaped inclined block 122 fit more tightly with the arc-shaped inclined groove 121, increasing the pushing force of the arc-shaped inclined block 122 on the drive wheel 18. This effectively prevents the arc-shaped inclined block 122 from separating from the arc-shaped inclined groove 121 when the track 17 is conveying a large-sized cable. The cable is heavy and requires more thrust to move, making it difficult for the cable to move.

[0032] The number of the above components is not limited. Those skilled in the art can set it freely according to actual needs, as long as the above components are installed at the corresponding component connection positions.

[0033] A specific application of this embodiment is as follows: When using this invention, the construction personnel rotate the bidirectional threaded rod 16 to move the two placement platforms 14 away from each other, increasing the distance between the two placement platforms 14. Then, the cable to be laid is placed between the two placement platforms 14. After placement, the bidirectional threaded rod 16 is rotated in the opposite direction to move the two placement platforms 14 closer to each other, causing the track 17 to squeeze the cable and clamp it. After clamping, the two motors 111 are started to drive the rotating cylinder 112 located on the front to rotate counterclockwise, and the rotating cylinder 112 located on the back to rotate clockwise. The rotating cylinder 112 will drive the arc-shaped inclined block 122 and the spring return rod 123 to rotate. Since the arc-shaped inclined block 122 is in contact with the arc-shaped inclined groove 121, and the resistance of the cable is small at this time; During the rotation of the curved inclined block 122, the drive wheel 18 located on the right side will be driven to rotate, which in turn drives the track 17 to rotate, thereby transporting the cable and laying the cable. When the cable is laid underground and the bending point of the cable is stuck, the rotation resistance of the track 17 will increase. When the curved inclined block 122 pushes the drive wheel 18 to rotate, it will also be subject to a large resistance force. At this time, the curved inclined block 122 has difficulty pushing the drive wheel 18 to rotate. During the continuous rotation of the curved inclined block 122, the inclined surface of the curved inclined block 122 will be squeezed and lowered by the inclined surface of the curved inclined groove 121. The curved inclined block 122 will squeeze the spring return rod 123, causing the spring return rod 123 to accumulate rebound force. As the curved inclined block 122 continues to descend, it will separate from the curved inclined groove 121, reducing the continuous pushing force of the track 17 on the cable. This effectively prevents the track 17 from continuously rotating and applying a pushing force to the cable when the cable is stuck, which would cause the cable bending position to be subjected to excessive squeezing force and easily damage the cable insulation layer, thus ensuring the integrity of the cable during installation. Once the track 17 stops rotating, the construction workers can turn off the motor 111, then rotate the bidirectional threaded rod 16 again to move the two placement platforms 14 away from each other, thus releasing the clamping of the cable. The construction workers can then check the position where the cable is stuck. After checking, the position of the cable is moved to allow the cable to be transported smoothly. After that, the bidirectional threaded rod 16 is rotated again to clamp the cable, and the motor 111 is started to make the track 17 rotate to continue laying the cable. Secondly, when the drive wheel 18 rotates, the spring-loaded arc-shaped block 223 drives the inclined connecting ring 221 to rotate. The inclined surface of the inclined connecting ring 221 pushes the compression ring 212 to rotate. When the arc-shaped inclined block 122 and the spring return rod 123 descend, they drive the rotating ring 211 to descend. The rotating ring 211 drives the compression ring 212 to descend, causing the arc surface at the bottom of the compression ring 212 to press against the inclined surface of the inclined connecting ring 221. Figure 5 The position of F in the middle is shown; This will cause the inclined connecting ring 221 on the front to rotate clockwise, and the inclined connecting ring 221 on the back to rotate counterclockwise, driving the spring arc block 223 to rotate. This causes the spring arc block 223 to be compressed, accumulating rebound force until the spring arc block 223 contacts the other end of the arc groove 222. Figure 8 As shown in position G, the spring arc block 223 will push the drive wheel 18 on the front to rotate counterclockwise, and the drive wheel 18 on the back to rotate clockwise, so that the track 17 can transport the cable in the opposite direction for a distance, reducing the continuous squeezing force on the cable bending position, effectively preventing the cable bending position from being squeezed for a long time during the inspection process of construction personnel, thus keeping the cable in a relatively loose state and further preventing cable damage; Secondly, during the descent of the rotating ring 211, when the inclined surface of the rotating ring 211 contacts the inclined surface of the inclined arc ring 312, it will squeeze the inclined arc ring 312 to move towards the fixed plate 311. The inclined arc ring 312 will squeeze the compression spring 313, causing the compression spring 313 to accumulate elastic potential energy. As the rotating ring 211 continues to descend, when the inclined surface of the rotating ring 211 separates from the inclined surface of the inclined arc ring 312, the elastic force of the compression spring 313 will squeeze the outer wall of the rotating ring 211, increasing the moving resistance of the rotating ring 211. During the continuous rotation of the rotating cylinder 112, when the arc inclined block 122 is aligned with the arc inclined groove 121 again; The spring return rod 123 will release its rebound force, causing the spring return rod 123, the arc-shaped inclined block 122, and the rotating ring 211 to rise back to their original positions. By increasing the moving resistance of the rotating ring 211, its rising speed will be slowed down, making it difficult for the arc-shaped inclined block 122 to enter the arc-shaped inclined groove 121 in time. This effectively prevents the cable from being in a relatively loose state. After the arc-shaped inclined block 122 rises quickly into the arc-shaped inclined groove 121, it will push the drive wheel 18 to rotate again, and the track 17 will transport the cable to move again. This can easily cause the cable to get stuck again, resulting in the cable switching between stuck and loose states repeatedly, which can easily cause cable fatigue and damage.

[0034] When the construction workers move the cable and start the motor 111 again to make the rotating drum 112 rotate, the rotation speed of the rotating drum 112 is slow at the beginning during the process of increasing speed. After the arc-shaped inclined block 122 and the arc-shaped inclined groove 121 are aligned, they are difficult to separate in time. The arc-shaped inclined block 122 will then enter the arc-shaped inclined groove 121 again, thereby driving the drive wheel 18 to rotate. Secondly, when the construction worker rotates the bidirectional threaded rod 16 to move the two placement platforms 14 away from each other and needs to clamp a larger cable, the placement platform 14 will move towards the inclined plate 324, causing the arc surface of the push frame 323 to contact the inclined surface of the inclined plate 324. The push frame 323 will then be compressed and move upwards. The ball bearings on the inner wall of the push frame 323, such as... Figure 9 As shown in the position of H, it will contact the bottom of the spring piston plate 321, thereby pushing the spring piston plate 321 to rise, so that the spring piston plate 321 accumulates rebound force. When the spring piston plate 321 rises, it will compress the space inside the rotating cylinder 112, which will compress the gas inside the rotating cylinder 112. The gas will compress the spring return rod 123, increasing the descent resistance of the arc-shaped inclined block 122, thereby making the arc-shaped inclined block 122 fit more tightly with the arc-shaped inclined groove 121, increasing the pushing force of the arc-shaped inclined block 122 on the drive wheel 18; This effectively prevents the cable from separating from the curved inclined block 122 when the track 17 is conveying a large cable. The cable is heavy and requires more thrust to move, which can easily cause the cable to move. Additionally, when the pusher 323 rises, it also pushes the connecting rod 325 to rotate. The connecting rod 325 pushes the extrusion frame 314 towards the rotating cylinder 112, causing the extrusion frame 314 to compress the compression spring 313. This allows the compression spring 313 to accumulate elastic potential energy. When the rotating ring 211 descends again to compress the curved inclined ring 312, it will compress the compression spring 313 again, thus increasing the extrusion force of the curved inclined ring 312 on the rotating ring 211. This effectively prevents the insufficient extrusion force of the curved inclined ring 312 on the rotating ring 211 when the spring return rod 123 returns to its original position after descending. The compressed gas in the rotating cylinder 112 will then push the spring return rod 123 to rise rapidly, making it difficult for the rotating ring 211 to rise slowly. When the rotating cylinder 112 rotates, it will drive the spring piston plate 321 to rotate, which will reduce the friction force on the spring piston plate 321 by pushing the balls on the inner wall of the push frame 323.

[0035] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-efficiency cable laying device for power engineering construction, comprising a support frame (13), the top of the support frame (13) being provided with two placement platforms (14), the inner wall of the support frame (13) being provided with four connecting holes, the four connecting holes being in pairs, the inner walls of the two sets of connecting holes being fixedly connected with fixing rods (15), the inner walls of the two placement platforms (14) being provided with two guide holes, the four guide holes being in pairs, the inner walls of the two sets of guide holes being slidably connected to the outer walls of the two fixing rods (15); The inner wall of the support frame (13) has two rotating holes, and the inner walls of the two rotating holes are rotatably connected to a bidirectional threaded rod (16). The inner walls of the two placement platforms (14) are each provided with threaded holes. The outer walls of the bidirectional threaded rod (16) are threadedly connected to the inner walls of the two threaded holes. The inner walls of the two placement platforms (14) are each provided with two rotating holes, and the inner walls of the four rotating holes are each rotatably connected to a drive wheel (18). The inner walls of the two placement platforms (14) are each provided with an opening groove, and the inner walls of the two opening grooves are each rotatably connected to a track (17). The outer walls of the four drive wheels (18) are fixedly connected with a number of gear teeth. The four drive wheels (18) are arranged in pairs. The inner walls of the two tracks (17) are fixedly connected with a number of transmission teeth. The transmission teeth on the inner walls of the two tracks (17) mesh with the gear teeth on the outer walls of the two sets of drive wheels (18). The bottoms of the two placement platforms (14) contain the same parts. The interiors of the two drive wheels (18) on the right side contain the same parts. Also includes: The laying mechanism (1) is fixedly installed at the bottom of the placement platform (14) for laying cables; Release mechanism (2), which is rotatably disposed on the inner wall of the placement platform (14) for releasing stuck cables; The limiting mechanism (3) is fixedly installed at the bottom of the placement platform (14) and is used to compress the laying mechanism (1).

2. The high-efficiency cable laying device for power engineering construction according to claim 1, characterized in that: The laying mechanism (1) includes: A drive assembly (11) is fixedly disposed at the bottom of the placement platform (14); Synchronization component (12), which is slidably disposed on the inner wall of the right drive wheel (18); In use, the cable to be laid is placed between two tracks (17). Then, the bidirectional threaded rod (16) is rotated to allow the placement platform (14) to clamp the cable. Then, the drive wheel (18) and the track (17) are rotated through the drive assembly (11) and the synchronization assembly (12) to lay the cable. When the cable is stuck, the conveying resistance of the track (17) will increase. The synchronization assembly (12) will have difficulty driving the drive wheel (18) to rotate. The synchronization assembly (12) continues to rotate, and the drive wheel (18) will squeeze the synchronization assembly (12) to separate the two and stop the track (17) from rotating.

3. The high-efficiency cable laying device for power engineering construction according to claim 2, characterized in that: The loosening mechanism (2) includes: Rotating assembly (21), which is slidably disposed on the inner wall of the placement platform (14) via a sliding member; The sliding component includes a sliding hole 1 opened in the inner wall of the placement platform (14), and a rotating ring (211) is slidably connected to the inner wall of the sliding hole 1. A reversing assembly (22) is rotatably mounted on the outer wall of the right drive wheel (18) via a rotating component; The rotating component includes an inclined connecting ring (221) that is rotatably connected to the outer wall of the right drive wheel (18). When the synchronization component (12) separates from the drive wheel (18), it will cause the rotating component (21) to descend, squeeze the reverse component (22) to rotate, and cause the drive wheel (18) on the right side to rotate in the opposite direction, thus loosening the cable.

4. The high-efficiency cable laying device for power engineering construction according to claim 3, characterized in that: The limiting mechanism (3) includes: The extrusion assembly (31) is fixedly mounted on the bottom of the placement platform (14) by means of a connector; The connector includes two fixing plates (311) fixedly connected to the bottom of the placement platform (14). A lifting assembly (32) is fixedly mounted on the bottom of the placement platform (14) by means of a support member; The support includes four limiting rods (322) fixedly connected to the bottom of the placement platform (14), and four inclined panels (324) fixedly connected to the top of the support frame (13). When the rotating component (21) descends, it will be squeezed by the squeezing component (31), increasing the upward resistance of the rotating component (21). The squeezing force on the synchronous component (12) can be increased by the lifting component (32).

5. The high-efficiency cable laying device for power engineering construction according to claim 2, characterized in that: The drive assembly (11) includes a motor (111) fixedly connected to the bottom of the placement platform (14), and a rotating cylinder (112) is provided at the bottom of the placement platform (14). The top of the output end of the motor (111) is fixedly connected to the bottom of the rotating cylinder (112).

6. The high-efficiency cable laying device for power engineering construction according to claim 5, characterized in that: The synchronization component (12) includes three arc-shaped inclined grooves (121) opened on the inner wall of the right drive wheel (18), three arc-shaped sliding grooves opened on the inner wall of the rotating cylinder (112), and arc-shaped inclined blocks (122) slidably connected to the inner walls of the three arc-shaped sliding grooves. Three sliding holes are opened on the inner wall of the rotating cylinder (112), and spring return rods (123) are slidably connected to the inner walls of the three sliding holes. The top of each of the three spring reset rods (123) is fixedly connected to a mounting block, the top of each of the three mounting blocks is fixedly connected to the bottom of each of the three arc-shaped inclined blocks (122), and the outer wall of each of the three arc-shaped inclined blocks (122) is slidably connected to the inner wall of each of the three arc-shaped inclined grooves (121). In this process, after the track (17) clamps the cable, the starting motor (111) drives the rotating cylinder (112), the arc-shaped inclined block (122) and the spring return rod (123) to rotate. The arc-shaped inclined block (122) will push the drive wheel (18) to rotate, allowing the track (17) to transport the cable. When the cable is stuck, the rotational resistance of the track (17) will increase. The arc-shaped inclined block (122) will have difficulty pushing the drive wheel (18) to rotate, and will be squeezed down and separated from the arc-shaped inclined groove (121), causing the drive wheel (18) to stop rotating.

7. The high-efficiency cable laying device for power engineering construction according to claim 3, characterized in that: The rotating assembly (21) includes an annular groove formed on the inner wall of the rotating ring (211), and a compression ring (212) is rotatably connected to the inner wall of the annular groove. The inner wall of the compression ring (212) is slidably connected to the outer wall of the right drive wheel (18), and the inner wall of the rotating ring (211) is fixedly connected to the side walls of the three mounting blocks. When the curved inclined block (122) descends, it will drive the spring reset rod (123) to descend, causing the rotating ring (211) and the squeezing ring (212) to descend.

8. The high-efficiency cable laying device for power engineering construction according to claim 7, characterized in that: The reverse assembly (22) includes four arc-shaped grooves (222) opened on the inner wall of the right drive wheel (18). Each of the four arc-shaped grooves (222) has a spring arc-shaped block (223) slidably connected to its inner wall. The side of each of the four spring arc-shaped blocks (223) near the outer wall of the right drive wheel (18) is fixedly connected to the inner wall of the inclined connecting ring (221). When the drive wheel (18) stops rotating, the compression ring (212) descends and compresses the inclined surface of the inclined connecting ring (221), causing the inclined connecting ring (221) to rotate and the spring arc block (223) to be compressed until the spring arc block (223) fits into the arc groove (222), pushing the drive wheel (18) to rotate in the opposite direction.

9. The high-efficiency cable laying device for power engineering construction according to claim 4, characterized in that: The extrusion assembly (31) includes two inclined arc rings (312) disposed at the bottom of the placement platform (14). An extension rod is fixedly connected to the side of the two inclined arc rings (312) away from the outer wall of the rotating cylinder (112). The outer walls of the two extension rods are slidably connected to the inner walls of the two fixed plates (311). A compression spring (313) is fitted on the outer wall of each of the two extension rods. Two extrusion frames (314) are provided at the bottom of the placement platform (14). The inner walls of the two extrusion frames (314) are slidably connected to the outer walls of the two extension rods. When the rotating ring (211) descends, it will squeeze the inclined surface of the inclined arc ring (312), causing the inclined arc ring (312) to move towards the fixed plate (311). The inclined arc ring (312) will squeeze the compression spring (313), increasing the moving resistance of the rotating ring (211).

10. The high-efficiency cable laying device for power engineering construction according to claim 9, characterized in that: The lifting assembly (32) includes two pushers (323) rotatably disposed at the bottom of the placement platform (14), and four limiting rods (322) in pairs. The inner walls of the two pushers (323) each have two sliding holes. The four sliding holes are in pairs, and the inner walls of the two sets of sliding holes are slidably connected to the outer walls of the two sets of limiting rods (322). The bottom of the placement platform (14) is provided with a spring piston plate (321), the inner wall of the rotating cylinder (112) is provided with a pressure groove, the outer wall of the spring piston plate (321) is slidably connected to the inner wall of the pressure groove, and the top of the two push frames (323) are rotatably connected with connecting rods (325). The inner walls of the two connecting rods (325) are rotatably connected to the bottom of the two extrusion frames (314), and the inner walls of the two push frames (323) are provided with semi-circular grooves, and the inner walls of the two semi-circular grooves are rotatably connected with ball bearings. When it is necessary to adjust the distance between the two placement platforms (14), the two placement platforms (14) are moved away from each other by rotating the bidirectional threaded rod (16). At this time, the pusher (323) will come into contact with the inclined plate (324), causing the pusher (323) to be squeezed and move upward, pushing the spring piston plate (321) to rise, squeezing the gas inside the rotating cylinder (112), and increasing the descent resistance of the spring return rod (123).