Weak current engineering line pipe elastic supporting mechanism

By designing a weak-current engineering line tube elastic support mechanism including a shell, a moving plate, a vibrating component and a fixed component, the problem of high-altitude mount telephone lines being damaged by ice and snow under extreme weather conditions is solved, and the effect of effectively reducing pipeline pressure and improving snow removal efficiency is achieved.

CN222582005UActive Publication Date: 2025-03-07ZHEJIANG SHANG CENTURY HOLDING GROUP CO LTD
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Patent Information

Application Number
CN202420983551.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-08
Publication Date
2025-03-07
Estimated Expiration
2034-05-08

AI Technical Summary

Technical Problem

Telephone lines mounted at high altitudes are easily damaged by ice and snow in extreme weather conditions, resulting in damage to the line.

Method used

An elastic support mechanism for weak current engineering wire tubes is designed, including a housing, a moving plate, a vibrating component and a fixing component. The pressure is transferred to the moving plate through the connector, which moves downward and transmits vibration force through the vibrating components, causing ice and snow on the pipe to fall off, alleviate the pressure on the pipe, and creates vibrations through the reset process to further remove snow.

Benefits of technology

It effectively reduces the pressure of the pipeline in extreme weather conditions, prevents line damage, and improves snow removal efficiency through vibrating snow removal mechanism, protects line pipelines.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an elastic supporting mechanism for a weak current engineering line pipe, which relates to the technical field of weak current engineering and comprises a shell, a vibration component and a fixing component. In ice and snow weather, the pipeline is icy and covered by snow, the pipeline transmits pressure to the movable plate through the connector, the movable plate moves downwards under the action of the pressure, and therefore vibration force is transmitted to the pipeline through the vibration component, and the pipeline is prevented from being damaged. Ice and snow on the pipeline fall off through vibration, so that the pressure borne by the pipeline is reduced, the movable plate is reset, and the vibration component vibrates in the reset process, so that the purpose of removing the ice and snow is achieved; when the circuit pipeline is vibrated, the movable plate can move downwards under the action of pressure until the fixed part is triggered, and at the moment, the fixed part can quickly push the movable plate to the top, so that greater vibration is generated, and the circuit pipeline can be fixed, so that the pipeline cannot be easily damaged.
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Description

Technical Field

[0001] The utility model relates to the technical field of weak current engineering, in particular to an elastic supporting mechanism for a weak current engineering line tube. Background Art

[0002] Telephone lines installed at high altitudes are usually covered with conduits (also called cable conduits or PVC conduits) to provide additional protection. Conduits not only protect telephone lines from direct damage from the external environment, such as wind, sun, and rain, but also protect the lines from mechanical damage, such as being scratched by sharp objects. Conduits can be made of metal or plastic, with plastic conduits (such as PVC) being more common because they are light, cheap, corrosion-resistant, and not very conductive.

[0003] Telephone lines installed at high altitudes do have higher risks than ground lines. Extreme weather such as thunderstorms, hail, and heavy snow may cause direct physical damage to the lines. Excessive ice and snow may cause the pipes to be covered with snow, which may break most of the supporting structure and cause damage to the lines. Utility Model Content

[0004] The utility model aims to provide an elastic support mechanism for a weak current engineering wire tube to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A flexible support mechanism for a weak current engineering wire tube comprises a shell, a slide groove is provided on one side of the shell, a movable groove is provided on the side of the shell away from the slide groove, a movable plate is arranged inside the shell, the movable plate is slidably connected to the shell, a support column is fixedly connected below the movable plate, a connecting rod is fixedly connected to one side of the movable plate, the connecting rod is slidably connected to the slide groove, a connector is fixedly connected to the bottom of the connecting rod, a vibrating component for vibrating and resetting the wire tube is connected inside the shell, and a fixing component for forcibly fixing the movable plate is connected to one side of the shell.

[0007] When encountering heavy ice and snow weather, the pipes will ice and be covered with snow. At this time, the pipes transfer pressure to the movable plate through the connector. At this time, the movable plate moves downward under the action of pressure, thereby transferring the vibration force to the pipe through the vibrating component, so that the ice and snow on the pipe fall off through vibration, thereby reducing the pressure on the pipe. At this time, due to the reduction of pressure on the pipe, the movable plate is reset. During the resetting process, vibration will be generated through the vibrating component, thereby better achieving the purpose of ice and snow removal. When the vibration generated by the vibrating component is not enough to remove snow, the movable plate will move downward under the action of pressure until the fixed component is triggered. At this time, the fixed component will quickly push the movable plate to the top, thereby generating greater vibration and being able to fix the line pipe so that the pipe will not be easily damaged.

[0008] A further improvement of the technical solution of the utility model is that the vibration component includes a pressure spring, one end of the pressure spring is fixedly connected to the shell, the other end of the pressure spring is fixedly connected to a slider, the slider is slidably connected to the shell, a number of pressure springs and sliders are evenly and symmetrically arranged along the length direction of the shell, grooves are symmetrically opened on the movable plate, an elastic spring is fixedly connected in the groove, the other end of the elastic spring is fixedly connected to a stopper, the stopper is slidably connected to the groove, a bottom plate is fixedly connected in the shell, a reset spring is fixedly connected on the bottom plate, and the other end of the reset spring is fixedly connected to the movable block.

[0009] The above-mentioned technical scheme is adopted. In this scheme, when the movable plate is subjected to pressure, the slider and the block are respectively subjected to pressure. At this time, the pressure spring, the return spring and the elastic spring are respectively in a compressed state, and then the movable plate falls. When the block touches the slider, there will be a certain buffer. At this time, the vibration generated by the movable plate will be transmitted to the pipe, causing the pipe to vibrate, thereby removing the ice and snow covering the pipe. At this time, the pressure acting on the movable plate is reduced, and it returns to its original position under the action of the return spring, thereby achieving the purpose of vibration snow removal.

[0010] A further improvement of the technical solution of the utility model is that: the fixing component includes a clamping assembly, a side of the shell away from the connecting rod is fixedly connected to a box body, a side of the box body close to the shell is provided with a connecting groove, a first spring is fixedly connected to the inside of the box body, the other end of the first spring is fixedly connected to a support plate, the support plate is slidably connected to the box body, a moving rod is fixedly connected to the lower side of the moving plate, the moving rod is slidably connected to the moving groove, and the clamping assembly is used in conjunction with the support plate.

[0011] The above technical solution is adopted. In this solution, when the weather conditions are bad, ice and snow accumulate on the pipeline more seriously. At this time, the pressure will drive the movable plate to move downward, and then start the fixing component by triggering the clamping assembly. At this time, the fixing component will push the connecting rod through the support plate to drive the movable plate to reset. This can not only relatively lower the center of the line pipeline, but also perform snow removal through the faster frequency vibration generated during the reset process, which can maximize the protection of the line pipeline.

[0012] A further improvement of the technical solution of the utility model is that the clamping assembly includes a fixing plate, which is slidably connected to the shell, a through hole is opened on the fixing plate, a clamping block is fixedly connected under the support column, a concave block is fixedly connected to one side of the shell close to the connecting rod, a second spring is fixedly connected in the concave block, and the other end of the second spring is fixedly connected to the fixing plate.

[0013] The above-mentioned technical solution is adopted. In this solution, when the movable plate moves downward under the action of pressure, the blocking block under the support column will cooperate with the through hole. When the blocking block continues to move downward, the blocking block will drive the fixed plate to move through the mutual cooperation between the blocking block and the through hole, so that the fixed component opens and drives the movable plate to move. When the fixed component is reset, the fixed plate will also be reset under the action of the spring, thereby achieving the purpose of clamping the fixed component.

[0014] A further improvement of the technical solution of the utility model is that the fixing plate is L-shaped.

[0015] By adopting the above technical solution, the stability of the fixing plate during operation can be increased by setting the fixing plate to be L-shaped.

[0016] A further improvement of the technical solution of the utility model is that a suspension rod is fixedly connected to the lower part of the support plate, and the suspension rod is slidably connected to the box body.

[0017] The above-mentioned technical solution is adopted. In this solution, a hanging rod is arranged under the supporting plate in order to facilitate the resetting of the fixing component. When the fixing component resets the movable plate, it is only necessary to pull the hanging rod downward by using a tool so that the hanging rod is stuck by the fixing plate. In this way, the fixing effect of the fixing component can be released, so that the device can be used normally.

[0018] A further improvement of the technical solution of the utility model is that: an outer surface of the stopper away from the elastic spring is provided with a wear-resistant layer, and the material of the wear-resistant layer is tungsten carbide.

[0019] With the above technical solution, since the block needs to slide frequently during operation, the wear-resistant layer can be provided to prevent the block from being worn due to frequent sliding, thereby extending the service life of the block.

[0020] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0021] 1. The utility model provides an elastic support mechanism for wire pipes in weak current engineering. When encountering heavy ice and snow weather, ice will form on the pipes and they will be covered with snow. At this time, the pipes transfer pressure to the movable plate through the connector. At this time, the movable plate moves downward under the action of pressure, thereby transferring the vibration force to the pipes through the vibration component, thereby causing the ice and snow on the pipes to fall off through vibration, thereby reducing the pressure on the pipes. At this time, due to the reduction in the pressure on the pipes, the movable plate is reset, and vibration is generated through the vibration component during the reset process, thereby better achieving the purpose of removing ice and snow. When the vibration generated by the vibration component is not enough to remove snow, the movable plate will move downward under the action of pressure until the fixing component is triggered. At this time, the fixing component will quickly push the movable plate to the top, thereby generating greater vibration and being able to fix the line pipes, so that the pipes will not be easily damaged.

[0022] 2. The utility model provides an elastic support mechanism for wire pipes in weak current engineering projects. When the moving plate is subjected to pressure, the slider and the stopper are respectively subjected to pressure. At this time, the pressure spring, the return spring and the elastic spring are respectively in a compressed state. Then the moving plate falls, and when the stopper touches the slider, there will be a certain buffer. At this time, the vibration generated by the moving plate will be transmitted to the pipeline, causing the pipeline to vibrate, thereby removing the ice and snow covering the pipeline. At this time, the pressure acting on the moving plate is reduced, and it returns to its original position under the action of the return spring, thereby achieving the purpose of vibration snow removal.

[0023] 3. The utility model provides an elastic support mechanism for wire pipes in weak current engineering projects. When the weather conditions are bad, ice and snow accumulate on the pipes seriously. At this time, the pressure will drive the movable plate to move downward, and then the fixing component will be started by triggering the clamping assembly. At this time, the fixing component will push the connecting rod through the support plate to drive the movable plate to reset. This can not only relatively lower the center of the line pipe, but also perform snow removal through the faster frequency vibration generated during the reset process, which can protect the line pipe to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 This is a first structural schematic diagram of the utility model;

[0026] Figure 2 It is a second structural schematic diagram of the utility model;

[0027] Figure 3 It is a schematic diagram of the transverse cross-sectional structure of the utility model;

[0028] Figure 4 It is a schematic diagram of the vertical structure of the utility model;

[0029] Figure 5 It is a schematic diagram of the enlarged structure of point A of the utility model;

[0030] Figure 6 It is an enlarged structural diagram of B of the utility model;

[0031] In the figure: 1. shell; 2. slide groove; 3. moving groove; 4. moving plate; 5. support column; 6. connecting rod; 7. connector; 8. pressure spring; 9. slider; 10. groove; 11. elastic spring; 12. block; 13. bottom plate; 14. reset spring; 15. box body; 16. first spring; 17. support plate; 18. moving rod; 19. connecting groove; 20. fixed plate; 21. through hole; 22. block; 23. concave block; 24. second spring; 25. suspension rod; 26. wear-resistant layer. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the embodiments:

[0033] Example 1

[0034] like Figure 1 , Figure 4 As shown, the utility model provides an elastic support mechanism for a weak current engineering wire tube, comprising a shell 1, a slide groove 2 is provided on one side of the shell 1, a movable groove 3 is provided on the side of the shell 1 away from the slide groove 2, a movable plate 4 is arranged in the shell 1, the movable plate 4 is slidably connected to the shell 1, a support column 5 is fixedly connected to the lower side of the movable plate 4, a connecting rod 6 is fixedly connected to one side of the movable plate 4, the connecting rod 6 is slidably connected to the slide groove 2, a connector 7 is fixedly connected to the bottom of the connecting rod 6, a vibrating component for vibrating and resetting the wire tube is connected inside the shell 1, and a fixing component for forcibly fixing the movable plate 4 is connected to one side of the shell 1.

[0035] In this embodiment, when encountering heavy ice and snow weather, ice will form on the pipeline and it will be covered with snow. At this time, the pipeline transfers pressure to the movable plate 4 through the connector 7. At this time, the movable plate 4 moves downward under the action of pressure, thereby transferring the vibration force to the pipeline through the vibration component, so that the ice and snow on the pipeline fall off through vibration, thereby reducing the pressure on the pipeline. At this time, due to the reduction of the pressure on the pipeline, the movable plate 4 is reset. During the resetting process, vibration will be generated through the vibration component, thereby better achieving the purpose of ice and snow removal. When the vibration generated by the vibration component is not enough to remove snow, the movable plate 4 will move downward under the action of pressure until the fixing component is triggered. At this time, the fixing component will quickly push the movable plate 4 to the top, thereby generating greater vibration and being able to fix the line pipeline so that the pipeline will not be easily damaged.

[0036] like Figure 4As shown, in the present embodiment, preferably, the vibration component includes a pressure spring 8, one end of the pressure spring 8 is fixedly connected to the shell 1, the other end of the pressure spring 8 is fixedly connected to a slider 9, the slider 9 is slidably connected to the shell 1, and the pressure spring 8 and the slider 9 are evenly and symmetrically arranged along the length direction of the shell 1. A plurality of grooves 10 are symmetrically provided on the movable plate 4, and an elastic spring 11 is fixedly connected in the groove 10. A stopper 12 is fixedly connected to the other end of the elastic spring 11, and the stopper 12 is slidably connected to the groove 10. A bottom plate 13 is fixedly connected in the shell 1, and a reset spring 14 is fixedly connected to the bottom plate 13, and the other end of the reset spring 14 is fixedly connected to the movable block.

[0037] When the movable plate 4 is subjected to pressure, the slider 9 and the stopper 12 are respectively subjected to pressure. At this time, the pressure spring 8, the return spring 14 and the elastic spring 11 are respectively in a compressed state, and then the movable plate 4 falls. When the stopper 12 touches the slider 9, there will be a certain buffer. At this time, the vibration generated by the movable plate 4 will be transmitted to the pipeline, causing the pipeline to vibrate, so that the ice and snow covering the pipeline can be removed. At this time, the pressure acting on the movable plate 4 is reduced, and it returns to its original position under the action of the return spring 14, thereby achieving the purpose of vibration snow removal.

[0038] like Figure 3 As shown, preferably, the fixing component includes a clamping assembly, a box body 15 is fixedly connected to the side of the shell 1 away from the connecting rod 6, a connecting groove 19 is provided on the side of the box body close to the shell, a first spring 16 is fixedly connected to the inside of the box body 15, the other end of the first spring 16 is fixedly connected to a support plate 17, the support plate 17 is slidably connected to the box body 15, a moving rod 18 is fixedly connected to the bottom of the moving plate 4, the moving rod 18 is slidably connected to the moving groove 3, and the clamping assembly is used in conjunction with the support plate 17.

[0039] When the weather conditions are bad, ice and snow accumulate on the pipeline more seriously. At this time, the pressure will drive the movable plate 4 to move downward, and then start the fixing component by triggering the clamping assembly. At this time, the fixing component will push the connecting rod through the support plate 17 to drive the movable plate 4 to reset. This can not only relatively lower the center of the line pipeline, but also perform snow removal through the faster frequency vibration generated during the reset process, which can protect the line pipeline to the greatest extent.

[0040] like Figure 5 As shown, preferably, the clamping assembly includes a fixing plate 20, which is slidably connected to the shell 1, and a through hole 21 is opened on the fixing plate 20, a clamping block 22 is fixedly connected below the support column 5, a recessed block 23 is fixedly connected to one side of the shell 1 close to the connecting rod 6, a second spring 24 is fixedly connected inside the recessed block 23, and the other end of the second spring 24 is fixedly connected to the fixing plate 20.

[0041] When the movable plate 4 moves downward under the action of pressure, the block 22 under the support column 5 will cooperate with the through hole 21. When the block 22 continues to move downward, the block 22 will drive the fixed plate 20 to move through the mutual cooperation with the through hole 21, so that the fixed component opens and drives the movable plate 4 to move. When the fixed component is reset, the fixed plate 20 will also be reset under the action of the spring, thereby achieving the purpose of clamping the fixed component.

[0042] Example 2

[0043] like Figure 3 As shown, based on Example 1, the utility model provides a technical solution: preferably, the fixing plate 20 is L-shaped.

[0044] In this embodiment, the fixing plate 20 is set to be L-shaped so as to increase the stability of the fixing plate 20 during operation.

[0045] Example 3

[0046] like Figure 3 As shown, based on Example 2, the utility model provides a technical solution: preferably, a suspension rod 25 is fixedly connected to the lower part of the support plate 17, and the suspension rod 25 is slidably connected to the box body 15.

[0047] In this embodiment, a hanging rod 25 is provided under the support plate 17 in order to facilitate the resetting of the fixing component. When the fixing component resets the movable plate 4, it is only necessary to pull the hanging rod 25 downward using a tool so that the hanging rod 25 is stuck by the fixing plate 20. In this way, the fixing effect of the fixing component can be released, so that the device can be used normally.

[0048] Example 4

[0049] like Figure 6 As shown, based on Example 3, the utility model provides a technical solution: preferably, the outer surface of the stopper 12 away from the elastic spring 11 is provided with a wear-resistant layer 26, and the material of the wear-resistant layer 26 is tungsten carbide.

[0050] In this embodiment, because the stopper 12 needs to slide frequently during operation, the wear-resistant layer 26 can prevent the stopper 12 from being worn due to frequent sliding, thereby extending the service life of the stopper 12.

[0051] The following is a detailed description of the working principle of the elastic support mechanism of the wire tube in the weak current engineering project.

[0052] like Figure 1-6As shown, when encountering heavy ice and snow weather, ice will form on the pipeline and it will be covered with snow. At this time, the pipeline transfers pressure to the movable plate 4 through the connector 7. At this time, the movable plate 4 moves downward under the action of pressure, thereby transferring the vibration force to the pipeline through the vibration component, so that the ice and snow on the pipeline fall off through vibration, thereby reducing the pressure on the pipeline. At this time, due to the reduction of the pressure on the pipeline, the movable plate 4 is reset. During the resetting process, vibration will be generated through the vibration component, thereby better achieving the purpose of ice and snow removal. When the vibration generated by the vibration component is not enough to remove snow, the movable plate 4 will move downward under the action of pressure until the fixing component is triggered. At this time, the fixing component will quickly push the movable plate 4 to the top, thereby generating greater vibration and being able to fix the line pipeline so that the pipeline will not be easily damaged. When the movable plate 4 is subjected to pressure, the slider 9 and the stopper 12 are respectively subjected to pressure, and the pressure spring 8, the return spring 14 and the elastic spring 11 are respectively in a compressed state, and then the movable plate 4 falls. When the stopper 12 touches the slider 9, there will be a certain buffer. At this time, the vibration generated by the movable plate 4 will be transmitted to the pipeline, causing the pipeline to vibrate, so that the ice and snow covered on the pipeline can be removed. At this time, the pressure acting on the movable plate 4 is reduced, and it returns to its original position under the force of the return spring 14, thereby achieving the purpose of vibration snow removal. When the weather conditions are bad, the ice and snow on the pipeline are seriously accumulated. At this time, the pressure will drive the movable plate 4 to move downward, and then the fixing component will be started by triggering the clamping assembly. At this time, the fixing component will push the connecting rod through the support plate 17 to drive the movable plate 4 to reset, which can not only relatively lower the center of the line pipeline, but also perform snow removal work through the faster frequency vibration generated during the reset process, so that the line pipeline can be protected to the maximum extent. When the movable plate 4 moves downward under the action of pressure, the block 22 below the support column 5 will cooperate with the through hole 21. When the block 22 continues to move downward, the block 22 will drive the fixed plate 20 to move by cooperating with the through hole 21, so that the fixed component opens and drives the movable plate 4 to move. When the fixed component is reset, the fixed plate 20 will also reset under the action of the spring, thereby achieving the purpose of clamping the fixed component. The stability of the fixed plate 20 during work can be increased by setting the fixed plate 20 to be L-shaped. In order to facilitate the reset of the fixed component, when the fixed component resets the movable plate 4, the hanger 25 only needs to be pulled downward by using a tool, so that the hanger 25 is stuck by the fixed plate 20, so that the fixing effect of the fixed component can be released, so that the device can be used normally. Because the block 12 needs to slide frequently during work, the wear-resistant layer 26 can prevent the block 12 from being worn due to frequent sliding, thereby extending the service life of the block 12.

[0053] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A weak current engineering line tube elastic support mechanism, comprising a housing (1); characterized in that: A slide groove (2) is provided on one side of the shell (1), and a movable groove (3) is provided on a side of the shell (1) away from the slide groove (2). A movable plate (4) is arranged inside the shell (1), and the movable plate (4) is slidably connected to the shell (1). A support column (5) is fixedly connected below the movable plate (4). A connecting rod (6) is fixedly connected to one side of the movable plate (4), and the connecting rod (6) is slidably connected to the slide groove (2). A connector (7) is fixedly connected to the bottom of the connecting rod (6). A vibrating component for vibrating and resetting the wire tube is connected inside the shell (1), and a fixing component for forcibly fixing the movable plate (4) is connected to one side of the shell (1).

2. The elastic support mechanism for a weak current engineering line pipe according to claim 1, characterized in that: The vibrating component comprises a pressure spring (8), one end of which is fixedly connected to the housing (1), the other end of which is fixedly connected to a slider (9), the slider (9) being slidably connected to the housing (1), a plurality of pressure springs (8) and sliders (9) being evenly and symmetrically arranged along the length direction of the housing (1), a groove (10) being symmetrically provided on the movable plate (4), an elastic spring (11) being fixedly connected in the groove (10), the other end of which is fixedly connected to a stopper (12), the stopper (12) being slidably connected to the groove (10), a bottom plate (13) being fixedly connected in the housing (1), a reset spring (14) being fixedly connected to the bottom plate (13), the other end of which is fixedly connected to the movable block.

3. The elastic support mechanism for a weak current engineering line pipe according to claim 2, characterized in that: The fixing component comprises a clamping assembly, a box body (15) is fixedly connected to a side of the shell (1) away from the connecting rod (6), a connecting groove (19) is provided on a side of the box body (15) close to the shell (1), a first spring (16) is fixedly connected to the inside of the box body (15), the other end of the first spring (16) is fixedly connected to a support plate (17), the support plate (17) is slidably connected to the box body (15), a moving rod (18) is fixedly connected to the bottom of the moving plate (4), the moving rod (18) is slidably connected to the moving groove (3), and the clamping assembly is used in conjunction with the support plate (17).

4. The elastic support mechanism for a weak current engineering line pipe according to claim 3, characterized in that: The clamping assembly comprises a fixing plate (20), the fixing plate (20) is slidably connected to the shell (1), a through hole (21) is provided on the fixing plate (20), a clamping block (22) is fixedly connected below the support column (5), a concave block (23) is fixedly connected to the side of the shell (1) close to the connecting rod (6), a second spring (24) is fixedly connected inside the concave block (23), and the other end of the second spring (24) is fixedly connected to the fixing plate (20).

5. The elastic support mechanism for a weak current engineering line tube according to claim 4, characterized in that: The fixing plate (20) is L-shaped.

6. The elastic support mechanism for a weak current engineering line tube according to claim 5, characterized in that: A suspension rod (25) is fixedly connected below the support plate (17), and the suspension rod (25) is slidably connected to the box body (15).

7. The elastic support mechanism for a weak current engineering line tube according to claim 6, characterized in that: The outer surface of the stopper (12) on the side away from the elastic spring (11) is provided with a wear-resistant layer (26), and the material of the wear-resistant layer (26) is tungsten carbide.