Bridge protection pipe and protection method thereof

Abstract

The application relates to the technical field of bridge pipelines, in particular to a bridge protection pipeline and a protection method thereof. The pipeline is externally sleeved with multiple protection pipes, the inner side walls of the multiple protection pipes are connected with the outer side wall of the pipeline through buffer springs, the left side and the right side of the interior of each protection pipe are provided with connecting pipes, the top end, the bottom end, the front end and the rear end of the connecting pipe located on the right side of the protection pipe are fixedly connected with first connecting plates, and the top end, the bottom end, the front end and the rear end of the connecting pipe located on the left side of the protection pipe are fixedly connected with second connecting plates. The single protection pipe can buffer the external local impact force, the whole protection pipe can be prevented from shaking, the protection effect is improved, the service life of the protection pipe is prolonged, the practicability of the protection pipe is improved, external water can be prevented from entering the interior of the protection pipe, the surface of the pipeline can be prevented from contacting water, the surface of the pipeline can be prevented from being corroded, and the service life of the pipeline is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge pipeline, in particular to a bridge protection pipeline and a protection method thereof. BACKGROUND

[0002] When designing municipal and highway bridges, in order to ensure driving safety and smoothness, prevent the bridge structure from being eroded by precipitation and affecting the durability of the bridge, according to the relevant national standards, a perfect bridge drainage system should be set up.

[0003] In the process of installing the bridge drainage pipeline, in order to prolong the service life of the pipeline, most of the protective pipes are sleeved outside the pipeline, and the protective pipe and the pipeline are connected by multiple springs. When the pipeline is subjected to strong vibration, the internal spring plays a buffering and protecting role for the pipeline, but the existing protective pipe is mostly as long as the pipeline. Since the protective pipe is relatively long, when subjected to external violent vibration, the protective pipe will shake as a whole. When the amplitude of shaking is large, it is easy to cause the protective pipe to break, reduce its protection effect, and reduce its service life. If multiple separate external protective pipes are simply used for separate protection, water will easily enter between the multiple protective pipes, reducing the sealing performance. If the radial circular surface of each external protective pipe is sealed, the construction process is complex and the cost is high. Therefore, it is extremely meaningful to design a structure that can isolate the vibration of multiple protective pipe supports from each other and facilitate assembly and disassembly while having high waterproofness. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the deficiencies of the prior art, the present application provides a bridge protection pipeline and a protection method thereof to solve the problems raised in the background art.

[0006] (II) Technical solutions

[0007] To achieve the above object, the present application provides the following technical scheme: A bridge protection pipeline and its protection method, comprising a pipeline, the outer side of the pipeline is sleeved with a plurality of protection pipes, the inner side wall of the plurality of protection pipes is connected with the outer side wall of the pipeline through a buffer spring, the left side and the right side of the inside of each protection pipe are provided with a first sliding groove, the inside of the first sliding groove is provided with a sliding pipe, the left end and the right end of the protection pipe are provided with a through groove penetrating into the inside of the first sliding groove, the inside of the through groove is slidably provided with a connecting pipe, one end of the connecting pipe extending into the inside of the first sliding groove is fixedly connected with the side wall of the corresponding sliding pipe, the end of the sliding pipe away from the connecting pipe is uniformly fixedly connected with a plurality of first compression springs, the end of the first compression spring away from the sliding pipe is fixedly connected with the end of the first sliding groove away from the through groove, the top left side, the bottom left side, the top right side and the rear side of the bottom of the protection pipe are provided with a fixing structure, the fixing structure is matched with the sliding pipe, the top end, the bottom end, the front end and the rear end of the connecting pipe located on the right side of the protection pipe are fixedly connected with a first connecting plate, the top end, the bottom end, the front end and the rear end of the connecting pipe located on the left side of the protection pipe are fixedly connected with a second connecting plate, the side away from the connecting pipe of the first connecting plate and the second connecting plate is provided with a left-right penetrating square groove, the inner side wall of each square groove is provided with four arc grooves, two adjacent arc grooves are vertically arranged, the inside of each square groove is provided with a ball, the outer side wall of each ball is fixedly connected with an arc block, the four arc blocks are respectively slidably matched with the four arc grooves, each ball is provided with a left-right penetrating insertion hole, a screw is inserted into the insertion hole of the ball on the adjacent first connecting plate and second connecting plate, a first spring is sleeved on the left end of the screw, the right end of the first spring is in contact with the left end of the first connecting plate, a nut is screwed on the right end of the screw, a second spring is sleeved on the right side of the screw, the left end of the second spring is in contact with the right end of the second connecting plate, the right end of the second spring is in contact with the left end of the nut, the left end of the connecting pipe located on the left side of the protection pipe is provided with an annular groove, the right end of the connecting pipe located on the right side of the protection pipe is fixedly connected with an annular block, the annular block is slidably matched with the annular groove.

[0008] Preferably, the fixing structure comprises a second sliding groove, a sliding block, a limiting plate and a pull rod, the inner wall of the second sliding groove is slidably matched with the inner side wall of the sliding block, one end of the limiting plate is fixedly connected with the end of the sliding block close to the pipeline, the other end of the limiting plate extends into the inside of the first sliding groove, the end of the sliding block away from the pipeline is fixedly connected with a second compression spring, the end of the second compression spring away from the pipeline is in contact with the end of the second sliding groove away from the pipeline, one end of the pull rod is fixedly connected with the end of the sliding block away from the pipeline, the other end of the pull rod extends to the outside of the protection pipe and is fixedly connected with a pull plate.

[0009] Preferably, the side close to the protection pipe of the pull plate is fixedly connected with a sealing ring, the sealing ring is sleeved on the outside of the pull rod, the end of the sealing pipe away from the pull plate is in contact with the outer side wall of the protection pipe.

[0010] Preferably, the left end of the annular groove is fixedly connected with a first sealing gasket, and the first sealing gasket is fixedly connected with the left end of the connecting pipe located on the left side of the protective pipe.

[0011] Preferably, the width of the annular groove is greater than the width of the annular block.

[0012] Preferably, the left end of the annular groove is fixedly connected with a first sealing gasket, and the first sealing gasket is fixedly connected with the left end of the connecting pipe located on the left side of the protective pipe.

[0013] Preferably, the inner side wall of the through groove is fixedly connected with a sealing sleeve, and the inner side wall of the sealing sleeve is in contact with the outer side wall of the connecting pipe.

[0014] A protective method of a bridge protective pipeline, comprising the following steps:

[0015] Step one, pull the pull plate on the two protective pipes on the adjacent pipeline to make the limiting plate slide to the inside of the second sliding groove, and push the connecting pipes on the adjacent pipeline to the inside of the first sliding groove respectively, release the pull plate when the two connecting pipes are pushed to the inside of the corresponding first sliding groove, and slide the limiting plate to the inside of the first sliding groove and fix the two connecting pipes through the action of the second compression spring;

[0016] Step two, insert the bolt into the two flanges on the adjacent pipeline, and screw the bolt to connect the adjacent pipelines;

[0017] Step three, pull the pull plate to make the limiting plate slide to the inside of the second sliding groove, and make the connecting pipe slide out of the first sliding groove through the action of the first compression spring, the side ends of the two adjacent connecting pipes are in contact, and the annular block is inserted into the inside of the annular groove;

[0018] Step four, insert the screw into the insertion hole of the ball on the first connecting plate and the second connecting plate, and screw the nut to fix;

[0019] Step five, when the protective pipe is impacted by the outside, the single protective pipe slightly shakes through the cooperation of the buffer spring, the ball, the arc-shaped block and the arc-shaped groove, so that the whole protective pipe on the outside of the pipeline is prevented from shaking.

[0020] (Three) beneficial effects

[0021] Compared with the prior art, the bridge protective pipeline and the protective method thereof have the following beneficial effects:

[0022] 1. The bridge protection pipeline and its protection method, a plurality of protection pipes are connected to the outside of the pipeline through buffer springs, the plurality of protection pipes are fixedly connected through connecting pipes, first connecting plates, second connecting plates and screws, when the protection pipes are impacted by the outside, the single protection pipe plays a buffering role to the local impact force from the outside through the cooperation of the buffer springs, the balls, the arc blocks, the arc grooves, the annular grooves and the annular blocks, the overall protection pipe can be prevented from shaking, the protection effect is improved, and the service life of the protection pipe is prolonged.

[0023] 2. The bridge protection pipeline and its protection method, the sealing property of the connection between the pull rod and the protection pipe, the connection between the adjacent two connecting pipes and the connection between the protection pipe and the connecting pipe is improved through the sealing ring, the first sealing gasket and the sealing sleeve, external water is prevented from entering the inside of the protection pipe, the surface of the pipeline is prevented from contacting water, the surface of the pipeline is prevented from being corroded, and the service life of the pipeline is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the application;

[0025] Figure 2 It is a sectional structural schematic diagram of the two pipeline connection places of the application;

[0026] Figure 3 It is a top view sectional structural schematic diagram of the first connecting plate located on the upside of the application;

[0027] Figure 4 It is a sectional structural schematic diagram of the application; Figure 1 It is a local enlarged structural schematic diagram of place A in the application;

[0028] Figure 5 It is a sectional structural schematic diagram of the application; Figure 2 It is a local enlarged structural schematic diagram of place B in the application.

[0029] In the drawing: 1, pipeline; 2, protection pipe; 3, buffer spring; 4, sliding pipe; 5, connecting pipe; 6, first compression spring; 7, first connecting plate; 8, second connecting plate; 9, arc groove; 10, arc block; 11, ball; 12, insertion hole; 13, screw; 14, first spring; 15, nut; 16, second spring; 17, annular groove; 18, annular block; 19, sliding block; 20, limiting plate; 21, second compression spring; 22, pull rod; 23, pull plate; 24, sealing ring; 25, first sealing gasket; 26, flange; 27, second sealing gasket; 28, sealing sleeve. DETAILED DESCRIPTION

[0030] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort should belong to the protection scope of the present application.

[0031] Embodiments

[0032] Please refer to Figures 1-5The utility model provides a bridge protection pipeline and protection method thereof, including pipeline 1, the outside of pipeline 1 is equipped with a plurality of protection pipe 2, and the inner side wall of a plurality of protection pipe 2 is connected with the outer side wall of pipeline 1 through buffer spring 3, and buffer spring 3 plays the role of buffer protection to pipeline 1, and the left side and the right side in the inside of each protection pipe 2 are provided with first sliding slot, and the inside of first sliding slot is provided with sliding pipe 4, and the left end and the right end of protection pipe 2 are provided with through slot that penetrates to the inside of first sliding slot, and the inside of through slot is slidably provided with connecting pipe 5, and one end of connecting pipe 5 extending to the inside of first sliding slot is fixedly connected with the side wall of corresponding sliding pipe 4, and the end of sliding pipe 4 away from connecting pipe 5 is uniformly fixedly connected with a plurality of first compression spring 6, and the end of first compression spring 6 away from sliding pipe 4 is fixedly connected with the end of first sliding slot away from through slot, the top left side, the bottom left side, the top right side and the rear side of the bottom of protection pipe 2 are provided with fixed structure, and fixed structure is adapted with sliding pipe 4, and the top end, the bottom end, the front end and the rear end of connecting pipe 5 located at the right side of protection pipe 2 are fixedly connected with first connecting plate 7, and the top end, the bottom end, the front end and the rear end of connecting pipe 5 located at the left side of protection pipe 2 are fixedly connected with second connecting plate 8, and the side away from connecting pipe 5 on first connecting plate 7 and second connecting plate 8 is provided with left and right through square slot, and the inner side wall of each square slot is provided with four arc grooves 9, and two adjacent arc grooves 9 are vertically arranged, and the inside of each square slot is provided with ball 11, and the outer side wall of each ball 11 is fixedly connected with arc block 10, and four arc blocks 10 are slidably matched with four arc grooves 9 respectively, and each ball 11 is provided with left and right through insertion hole 12, and the insertion hole 12 of ball 11 on adjacent first connecting plate 7 and second connecting plate 8 is inserted with screw 13, and the left end of screw 13 is provided with first spring 14, and the right end of first spring 14 contacts with the left end of first connecting plate 7, and the right end of screw 13 is externally screwed with nut 15, and the right side of screw 13 is externally provided with second spring 16, and the left end of second spring 16 contacts with the right end of second connecting plate 8, and the right end of second spring 16 contacts with the left end of nut 15, and the cooperation of ball 11, arc block 10, arc groove 9 and first spring 14 can make adjacent connecting pipe 5 relatively slide, and the left end of connecting pipe 5 located at the left side of protection pipe 2 is provided with annular groove 17, and the right end of connecting pipe 5 located at the right side of protection pipe 2 is fixedly connected with annular block 18, and annular block 18 is slidably matched with annular groove 17, and the role of first compression spring 6, first spring 14 and second spring 16 can make adjacent connecting pipe 5 be closely connected.

[0033] In the embodiment, specifically: the fixing structure comprises a second sliding groove, a sliding block 19, a limiting plate 20 and a pull rod 22, the inner wall of the second sliding groove is in sliding fit with the inner side wall of the sliding block 19, one end of the limiting plate 20 is fixedly connected with the end of the sliding block 19 close to the pipeline 1, the other end of the limiting plate 20 extends to the inside of the first sliding groove, the end of the sliding block 19 away from the pipeline 1 is fixedly connected with the second compression spring 21, the end of the second compression spring 21 away from the pipeline 1 is in contact with the end of the second sliding groove away from the pipeline 1, one end of the pull rod 22 is fixedly connected with the end of the sliding block 19 away from the pipeline 1, the other end of the pull rod 22 extends to the outside of the protective pipe 2 and is fixedly connected with a pull plate 23, the limiting plate 20 is pulled out of the first sliding groove through the pull plate 23, the sliding pipe 4 is facilitated to slide in the first sliding groove, and meanwhile the limiting plate 20 can clamp and fix the sliding pipe 4, thereby facilitating the installation between adjacent pipelines 1.

[0034] In the embodiment, specifically: the side of the pull plate 23 close to the protective pipe 2 is fixedly connected with a sealing ring 24, the sealing ring 24 is sleeved on the outside of the pull rod 22, and the end of the sealing pipe away from the pull plate 23 is in contact with the outer side wall of the protective pipe 2, so that the sealing property between the pull rod 22 and the protective pipe 2 is improved.

[0035] In the embodiment, specifically: the left end of the annular groove 17 is fixedly connected with a first sealing gasket 25, and the left end of the first sealing gasket 25 is fixedly connected with the left end of the connecting pipe 5 located at the left side of the protective pipe 2, so that the sealing property of the connection between adjacent connecting pipes 5 is improved.

[0036] In the embodiment, specifically: the width of the annular groove 17 is greater than the width of the annular block 18, the annular block 18 is facilitated to slide in the annular groove 17, and the single protective pipe 2 can slide relative to the adjacent connecting pipe 5 when the single protective pipe 2 is impacted.

[0037] In the embodiment, specifically: the rear end of the left end of the pipeline 1 is fixedly connected with a flange 26, the left end of the flange 26 located at the left side is fixedly connected with a second sealing gasket 27, and the sealing property of the connection between adjacent pipelines 1 is improved.

[0038] In the embodiment, specifically: the inner side wall of the through groove is fixedly connected with a sealing sleeve 28, and the inner side wall of the sealing sleeve 28 is in contact with the outer side wall of the connecting pipe 5, so that the sealing property of the connection between the connecting pipe 5 and the protective pipe 2 is improved.

[0039] The application also provides a protection method of the bridge protective pipeline, which comprises the following steps:

[0040] Step one, pull the pull plate 23 on the two protective tubes 2 on the adjacent pipeline 1 to make the limiting plate 20 pull to the inside of the second sliding groove, at the same time, push the connecting pipe 5 on the adjacent pipeline 1 to the inside of the first sliding groove respectively, when the two connecting pipes 5 push to the inside of the corresponding first sliding groove, release the pull plate 23, push the limiting plate 20 to slide to the inside of the first sliding groove and fix the two connecting pipes 5 through the action of the second compression spring 21;

[0041] Step two, insert the bolt into the two flanges 26 on the adjacent pipeline 1, and screw the bolt to connect the adjacent pipeline 1;

[0042] Step three, pull the pull plate 23 to make the limiting plate 20 move to the inside of the second sliding groove, make the connecting pipe 5 slide out of the first sliding groove through the action of the first compression spring 6, the side end of the two adjacent connecting pipes 5 contact, and the annular block 18 is inserted into the inside of the annular groove 17;

[0043] Step four, insert the screw 13 into the insertion hole 12 of the ball 11 on the adjacent first connecting plate 7 and second connecting plate 8, and screw the nut 15 tightly;

[0044] Step five, when the protective tube 2 is impacted by the outside, make the single protective tube 2 slightly shake through the cooperation of the buffer spring 3, the ball 11, the arc block 10 and the arc groove 9, avoid the whole protective tube 2 on the outside of the pipeline 1 to shake as a whole.

[0045] In summary, the bridge protective pipeline and its protection method, when in use, first pull the pull plate 23 on the two protective tubes 2 on the adjacent pipeline 1 to make the limiting plate 20 pull to the inside of the second sliding groove, at the same time, push the connecting pipe 5 on the adjacent pipeline 1 to the inside of the first sliding groove respectively, when the two connecting pipes 5 push to the inside of the corresponding first sliding groove, release the pull plate 23, push the limiting plate 20 to slide to the inside of the first sliding groove and fix the two connecting pipes 5 through the action of the second compression spring 21, then insert the bolt into the two flanges 26 on the adjacent pipeline 1, and screw the bolt to connect the adjacent pipeline 1, then pull the pull plate 23 to make the limiting plate 20 move to the inside of the second sliding groove, make the connecting pipe 5 slide out of the first sliding groove through the action of the first compression spring 6, the side end of the two adjacent connecting pipes 5 contact, and the annular block 18 is inserted into the inside of the annular groove 17, then insert the screw 13 into the insertion hole 12 of the ball 11 on the adjacent first connecting plate 7 and second connecting plate 8, and screw the nut 15 tightly, when the protective tube 2 is impacted by the outside, make the single protective tube 2 slightly shake through the cooperation of the buffer spring 3, the ball 11, the arc block 10 and the arc groove 9, avoid the whole protective tube 2 on the outside of the pipeline 1 to shake as a whole.

[0046] The bridge protection pipeline and the protection method thereof improve the sealing performance of the connection between the pull rod and the protection pipeline, the connection between the two adjacent connecting pipes and the connection between the protection pipeline and the connecting pipe through the sealing ring, the first sealing gasket and the sealing sleeve, prevent the external water from entering the inside of the protection pipeline, prevent the pipeline surface from contacting with the water, prevent the pipeline surface from being corroded and prolong the service life of the pipeline.

[0047] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely divergences of the principles and spirit of the application and that numerous modifications, changes, substitutions, and alterations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A bridge protection pipeline, comprising a pipeline (1), characterized in that: Multiple protective tubes (2) are sleeved on the outside of the pipe (1). The inner walls of the multiple protective tubes (2) are connected to the outer wall of the pipe (1) by buffer springs (3). Each protective tube (2) has a first sliding groove on its left and right sides. A sliding tube (4) is installed inside the first sliding groove. The left and right ends of the protective tubes (2) are provided with through grooves that penetrate into the first sliding groove. A connecting tube (5) is slidably installed inside the through groove. One end of the connecting tube (5) extending into the first sliding groove is fixedly connected to the side wall of the corresponding sliding tube (4). Multiple first pressure springs are evenly fixedly connected to the end of the sliding tube (4) away from the connecting tube (5). A compression spring (6) is fixedly connected at one end away from the slide tube (4) to the other end of the first slide groove away from the through groove. The top left, bottom left, top right, and bottom rear sides of the protective tube (2) are all provided with fixing structures that are compatible with the slide tube (4). The top, bottom, front, and rear ends of the connecting tube (5) located on the right side of the protective tube (2) are all fixedly connected with a first connecting plate (7). The top, bottom, front, and rear ends of the connecting tube (5) located on the left side of the protective tube (2) are all fixedly connected with a second connecting plate (8). The first connecting plate (7) and the second connecting plate (8) are located away from the connecting tube (4). 5) Each side is provided with a square groove that runs through the left and right. Each square groove has four arc-shaped grooves (9) on its inner side wall. Two adjacent arc-shaped grooves (9) are set perpendicularly. Each square groove has a sphere (11) inside. Each sphere (11) has an arc-shaped block (10) fixedly connected to its outer side wall. The four arc-shaped blocks (10) slide with the four arc-shaped grooves (9) respectively. Each sphere (11) has a through-hole (12) on its left and right sides. A screw (13) is inserted into the through-hole (12) of the sphere (11) on the adjacent first connecting plate (7) and second connecting plate (8). The left end of the screw (13) is fitted with a first spring (1). 4) The right end of the first spring (14) contacts the left end of the first connecting plate (7). A nut (15) is screwed onto the outer side of the right end of the screw (13). A second spring (16) is sleeved on the outer side of the right side of the screw (13). The left end of the second spring (16) contacts the right end of the second connecting plate (8). The right end of the second spring (16) contacts the left end of the nut (15). An annular groove (17) is provided on the left end of the connecting pipe (5) located on the left side of the protective pipe (2). An annular block (18) is fixedly connected to the right end of the connecting pipe (5) located on the right side of the protective pipe (2). The annular block (18) and the annular groove (17) slide together. The fixed structure includes a second slide groove, a slider (19), a limiting plate (20), and a pull rod (22). The inner wall of the second slide groove slides in cooperation with the inner wall of the slider (19). One end of the limiting plate (20) is fixedly connected to the end of the slider (19) near the pipe (1), and the other end of the limiting plate (20) extends into the interior of the first slide groove. A second compression spring (21) is fixedly connected to the end of the slider (19) away from the pipe (1). The end of the second compression spring (21) away from the pipe (1) contacts the end of the second slide groove away from the pipe (1). One end of the pull rod (22) is fixedly connected to the end of the slider (19) away from the pipe (1). The other end of the pull rod (22) extends to the outside of the protective pipe (2) and is fixedly connected to a pull plate (23). A sealing ring (24) is fixedly connected to the side of the pull plate (23) near the protective pipe (2). The sealing ring (24) is sleeved on the outside of the pull rod (22).

2. The bridge protection pipeline according to claim 1, characterized in that: The end of the sealing tube away from the pull plate (23) contacts the outer wall of the protective tube (2).

3. A bridge protection pipeline according to claim 2, characterized in that: The left end of the annular groove (17) is fixedly connected to a first sealing gasket (25), and the first sealing gasket (25) is fixedly connected to the left end of the connecting pipe (5) located on the left side of the protective pipe (2).

4. A bridge protection pipeline according to claim 3, characterized in that: The width of the annular groove (17) is greater than the width of the annular block (18).

5. A bridge protection pipeline according to claim 4, characterized in that: The left end of the pipe (1) is fixedly connected to a flange (26), and the left end of the flange (26) on the left side is fixedly connected to a second sealing gasket (27).

6. A bridge protection pipeline according to claim 5, characterized in that: A sealing sleeve (28) is fixedly connected to the inner wall of the through groove, and the inner wall of the sealing sleeve (28) is in contact with the outer wall of the connecting pipe (5).

7. A method for protecting bridge protective pipelines as described in any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Pull the pull plate (23) on the two protective pipes (2) on the adjacent pipe (1) to pull the limiting plate (20) into the second slide groove. At the same time, push the connecting pipes (5) on the adjacent pipe (1) into the first slide groove respectively. When the two connecting pipes (5) are pushed to the innermost part of the corresponding first slide groove, release the pull plate (23). The limiting plate (20) is pushed into the first slide groove by the action of the second compression spring (21) and the two connecting pipes (5) are locked and fixed. Step 2: Insert the bolts into the two flanges (26) on the adjacent pipe (1) and tighten the bolts to connect the adjacent pipes (1); Step 3: Pull the pull plate (23) to move the limiting plate (20) into the second slide groove. The connecting pipe (5) slides out of the first slide groove by the action of the first compression spring (6). The side ends of the two adjacent connecting pipes (5) contact each other, and the annular block (18) is inserted into the annular groove (17). Step 4: Insert the screw (13) into the socket (12) of the ball (11) on the adjacent first connecting plate (7) and second connecting plate (8), and tighten the nut (15) to fix it. Step 5: When the protective tube (2) is impacted by the outside, the individual protective tube (2) is slightly shaken by the cooperation of the buffer spring (3), the ball (11), the arc block (10) and the arc groove (9), thus preventing the entire protective tube (2) outside the pipe (1) from shaking.

Images