Horizontal compensator for pumping and jacking concrete in steel pipe column

Abstract

The invention discloses a horizontal compensator for pumping and jacking concrete in a steel pipe column, and belongs to the technical field of pipeline connection. Comprising two connecting pipes which are coaxially and oppositely arranged, corrugated pipes which are fixedly arranged at the opposite ends of the two connecting pipes respectively, a middle pipe of which the two ends are fixedly connected with the ends, away from the connecting pipes, of the two corrugated pipes respectively, and a first supporting plate which is fixed to the connecting pipes. The two corrugated pipes are arranged at the connecting position of the pipelines to expand or contract in the axial direction, so that the connecting position of the two sections of pipelines can be subjected to length compensation in real time, the situation that the connecting position of the pipelines is broken is avoided, and the service life of the pipelines is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to a horizontal compensator for concrete pumping and jacking in a steel pipe column, belonging to the technical field of pipeline connection. BACKGROUND

[0002] In the process of building construction, it is often necessary to use a steel pipe column pumping system to pump concrete mortar to achieve long-distance transportation of concrete mortar.

[0003] However, in the process of high-pressure jacking of the steel pipe column pumping system, the axial jacking causes lateral shaking, deviation, pressure fluctuation, etc., leading to micro-deformation of the pumping pipeline, and due to the lack of effective buffer devices, it is easy to cause cracking of the pipeline joint, thus there are certain problems. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a horizontal compensator for concrete pumping and jacking in a steel pipe column, which solves the problem of micro-deformation of the pumping pipeline and cracking of the pipeline joint in the process of concrete pumping in the prior art.

[0005] The technical problem to be solved by the present application is solved by the following technical solution: a horizontal compensator for concrete pumping and jacking in a steel pipe column, comprising: Two coaxially opposite connecting pipes, the end of the connecting pipe is fixedly provided with a connecting flange, A corrugated pipe is fixedly provided at the opposite end of the two connecting pipes, A middle pipe is fixedly connected at both ends to the end of the corrugated pipe away from the connecting pipe, A first support plate is fixed on the connecting pipe, A support structure is provided on the radial side of the connecting pipe and is detachably connected with the first support plate, and the support structure is used to provide support force for the mutual movement of the two connecting pipes.

[0006] By adopting the above technical solution, the two connecting pipes are fixedly connected to the flanges at the opposite ends of the two external pipes, and when the two pipes move relative to each other or move away from each other, the corrugated pipe is expanded or contracted along the axial direction by pulling the two connecting pipes, so that the connection between the two pipes can be compensated in real time, thereby avoiding the cracking of the pipe connection, improving the service life of the pipe, and the detachable connection structure of the support structure can improve the installation convenience of the horizontal compensator.

[0007] The present application is further provided as follows: the support structure comprises, A connecting piece is provided on the first support plate, A matching block is detachably fixedly connected with the connecting piece, A fixed block is fixed on the side of the matching block away from the connecting piece, A support rod extends axially along the connecting pipe and is arranged on the radial side of the connecting pipe, Wherein, the support rod is fixed with the fixing blocks on the two first support plates respectively, and the support rod is elastically deformed axially.

[0008] The application further provides that the connecting piece comprises: A rotating block is arranged on the side of the first support plate away from the connecting pipe, and the cooperating block is detachably fixedly connected with the rotating block, A rotating shaft is fixedly arranged on the first support plate, and the axial direction of the rotating shaft extends radially along the connecting pipe and is rotatably connected with the rotating block.

[0009] The application further provides that the rotating block is provided with a threaded hole, the cooperating block is provided with a through hole aligned with the threaded hole, the threaded hole and the through hole form a connecting hole after being aligned, and a bolt is inserted into the connecting hole, and the bolt is screw-connected with the threaded hole.

[0010] By adopting the above technical scheme, the support structure adopts the mode that the cooperating block is detachably connected with the rotating block, so that the number of the support rods can be changed in real time according to different use environments. During installation, the cooperating block is placed at the end of the rotating block away from the first support plate, the through hole is aligned with the threaded hole to form a connecting hole, and then a bolt is inserted into the connecting hole, so that the bolt fixes the through hole and the threaded hole, thereby completing the fixation of the cooperating block and the rotating block. The installation operation is convenient. Meanwhile, when two pipe sections are located on the same plane but are different in axis, at this time, the two connecting pipes can pass through the curved bellows to make the two connecting pipes axially aligned with and connected with the two pipe sections respectively, and the horizontal compensator is in a curved state. Then, the rotating block is rotated to make the rotating block rotate along the rotating shaft as a fixed axis, so that the rotating blocks on the two first support plates are arranged in parallel with each other. Then, the support rods are installed. At this time, the support rods can still support the horizontal compensator, and the support rods can elastically support the further bending of the bellows in the horizontal compensator, thereby improving the installation adaptability of the horizontal compensator.

[0011] The application further provides that the support rod comprises: The support sleeve is hollow, and one end of the support sleeve extends to one fixing block, The support slide rod is inserted into the inside of the support sleeve, and the other end of the support slide rod extends to the other fixing block, The support nut is sleeved on the end of the support slide rod located at the fixing block, the support nut is screw-connected with the support slide rod, and the support nut abuts against the side of the fixing block away from the support sleeve, The support end cover is arranged on the end of the support sleeve located at the fixing block, the support end cover is fixedly connected with the support sleeve, and the support end cover abuts against the side of the fixing block away from the support sleeve, The elastic member is arranged inside the supporting sleeve, one end of the elastic member is fixed to the part of the supporting sleeve inside towards the supporting end cover, and the other end of the elastic member is fixed to the end of the supporting slide inserted into the supporting sleeve.

[0012] By adopting the above technical scheme, first, the supporting sleeve is arranged at one end of the supporting slide inserted from one fixing block and the supporting end cover is abutted with the fixing block, then the supporting slide is axially moved to adapt the distance between the two fixing blocks, then the supporting slide is inserted through the other fixing block and screwed into the supporting nut at the end of the supporting slide, so that the supporting nut is abutted with the fixing block, at this time, since the distance between the two fixing blocks is fixed, the supporting slide and the supporting sleeve will not move relatively, the installation of the supporting rod is completed, under the working condition that the two pipes move axially in the same horizontal plane, the relative movement of the two connecting pipes is driven, and then the relative movement of the two fixing blocks is driven through the hard connection, at this time, the relative movement of the supporting slide and the supporting sleeve occurs, and due to the action of the elastic member, the elastic force is always provided for the supporting sleeve and the supporting slide to restore the initial state, when the two pipes are restored, the supporting rod is also restored to the initial state, so that the connecting part of the two pipes has the automatic reset capability, and the horizontal compensator can normally operate under the working condition that the two pipes move axially relatively.

[0013] The application is further provided with: the second supporting plates are fixedly arranged on the connecting pipes and the intermediate pipe on both sides of the extending direction of the corrugated pipe, and a plurality of auxiliary supporting rods are arranged along the circumference of the connecting pipes between the two second supporting plates.

[0014] The application is further provided with: the auxiliary supporting rod comprises: The auxiliary sleeve is hollow, one end of the auxiliary sleeve extends to one second supporting plate and penetrates the second supporting plate, The auxiliary threaded rod is inserted into the inside of the auxiliary sleeve and is threadedly connected with the auxiliary sleeve, the other end of the auxiliary threaded rod extends to the other second supporting plate and penetrates the second supporting plate, The auxiliary nut is sleeved on the end of the auxiliary threaded rod located at the second supporting plate, the auxiliary nut is threadedly connected with the second supporting plate and abuts with the end face of the second supporting plate away from the auxiliary sleeve, The auxiliary end cover is fixed at the end of the auxiliary sleeve located at one end of the second supporting plate, the auxiliary end cover abuts with the end face of the second supporting plate away from the auxiliary sleeve, The material of the auxiliary sleeve and the auxiliary threaded rod is elastic material.

[0015] By adopting the technical scheme, the auxiliary sleeve is inserted on the second support plate, the auxiliary end cover is abutted with the second support plate, then the auxiliary threaded rod is rotated to move out of the auxiliary sleeve or retract into the auxiliary sleeve, so that the distance of the second support plate is adapted, finally the end of the auxiliary threaded rod away from the auxiliary sleeve penetrates through another second support plate, and the auxiliary nut is screwed to the end of the auxiliary threaded rod, so that the auxiliary nut is abutted with another second support plate, thereby the installation of the auxiliary support rod is completed, under the working condition that the two sections of pipelines are radially dislocated, the two connecting pipes are synchronously driven to be radially dislocated, at this time, the two bellows are bent and deformed, the two sections of pipelines in the dislocation part are compensated, meanwhile, the auxiliary sleeve and the auxiliary threaded rod are elastically bent to support the connecting part of the intermediate pipe and the connecting pipe, so that the bellows is prevented from being excessively deformed and damaged, and after the two sections of pipelines return to the initial state, the elastic deformation of the auxiliary sleeve and the auxiliary threaded rod can be reset, thereby the bellows can return to the initial state, so that the horizontal compensator can normally operate under the working condition that the two sections of pipelines are radially dislocated, and the adaptation range of the horizontal compensator is improved.

[0016] The beneficial effects of the present application are that the two connecting pipes are fixedly communicated with the flanges at the opposite ends of the two sections of pipelines through the connecting flanges, at this time, when the two sections of pipelines move relatively or move away from each other, the bellows is expanded or contracted along the axial direction by driving the two connecting pipes, so that the connecting part of the two sections of pipelines can be compensated in real time, thereby the breakage of the connecting part of the pipelines is avoided, the service life of the pipelines is improved, and the installation convenience of the horizontal compensator is improved by using the detachable connecting structure of the support structure. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the present application; Figure 2 is a structural schematic view of the present application when the support rod and the auxiliary support rod are installed; Figure 3 is an exploded view of a partial structure in the present application; Figure 4 is a structural schematic view of the present application when the bellows is in a bent state; Figure 5 is a partial structure sectional view of the support rod in the present application.

[0018] In the figure: 10, connecting pipe; 11, connecting flange; 12, bellows; 13, intermediate pipe; 14, second support plate; 15, first support plate; 16, rotating block; 17, threaded hole; 20, auxiliary sleeve; 21, auxiliary end cover; 22, auxiliary threaded rod; 23, auxiliary nut; 30, fixed block; 31, matching block; 32, through hole; 33, support sleeve; 34, support end cover; 35, support slide; 36, support nut; 37, elastic member. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative characteristics, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific drawings.

[0020] As shown in Figures 1-2 , a horizontal compensator used for pumping and jacking concrete in a steel pipe column comprises multiple sets of compensation assemblies, each set of compensation assemblies is fixed through a flange, the compensation assembly comprises a connecting pipe 10, a corrugated pipe 12, an intermediate pipe 13, a first support plate 15 and a support structure, two connecting pipes 10 are coaxially arranged opposite to each other, a connecting flange 11 is fixedly arranged at the end of the connecting pipe 10, the connecting flange 11 can be connected with an external flange through a bolt fastener. The corrugated pipe 12 is fixedly arranged at the opposite end of the two connecting pipes 10 respectively, the intermediate pipe 13 is fixedly connected with the ends of the two corrugated pipes 12 away from the connecting pipe 10 respectively, the connecting portions of the corrugated pipe 12 and the connecting pipe 10 and the intermediate pipe 13 are fixed through a clamp or directly welded. The first support plate 15 is fixed on the connecting pipe 10, the first support plate 15 is arranged in a four-corner outward convex shape, the four corners of the outward convex first support plate 15 extend along the radial direction of the connecting pipe 10. The support structure is arranged on the radial side of the connecting pipe 10 and detachably connected with the outward convex part of the first support plate 15, the support structure is used to provide support force for the mutual movement of the two connecting pipes 10.

[0021] As shown in Figures 2-3 , the support structure comprises a fixed block 30, a matching block 31, a connecting piece and a support rod, the connecting piece is movably arranged on the first support plate 15, the matching block 31 is detachably fixedly connected with the connecting piece, the fixed block 30 is fixed on the side of the matching block 31 away from the connecting piece, the support rod extends along the axial direction of the connecting pipe 10 and is arranged on the radial side of the connecting pipe 10, the support rod is fixed with the fixed block 30 on the two first support plates 15 respectively, and the support rod elastically deforms along the axial direction. The connecting piece comprises a rotating block 16 and a rotating shaft, the rotating block 16 is arranged on the side of the first support plate 15 away from the connecting pipe 10, the matching block 31 is detachably fixedly connected with the rotating block 16, and the rotating shaft is fixedly arranged on the first support plate 15, the axial direction of the rotating shaft extends along the radial direction of the connecting pipe 10 and is rotatably connected with the rotating block 16. The rotating block 16 is provided with a threaded hole 17, the matching block 31 is provided with a through hole 32 aligned with the threaded hole 17, the threaded hole 17 and the through hole 32 form a connecting hole after being aligned, a bolt is inserted and arranged in the connecting hole, and the bolt is screwedly connected with the threaded hole 17.

[0022] As shown in Figure 4 and Figure 5As shown, the support rod comprises a support sleeve 33, a support end cover 34, a support slide 35, a support nut 36 and an elastic member 37. The support sleeve 33 is hollow and has a first opening opened in one direction along the axial direction. One end of the support sleeve 33 extends to one fixing block 30 and penetrates the fixing block 30. One end of the support slide 35 is inserted into the support sleeve 33 through the first opening of the support sleeve 33, and the other end of the support slide 35 extends to the other fixing block 30 and penetrates the fixing block 30. The support nut 36 is sleeved on the end of the support slide 35 located at the fixing block 30, and the support nut 36 is threadedly connected with the support slide 35 and abuts against the side of the fixing block 30 away from the support sleeve 33. The support end cover 34 is arranged at the end of the support sleeve 33 located at the fixing block 30, and the support end cover 34 is fixedly connected with the support sleeve 33 and abuts against the side of the fixing block 30 away from the support sleeve 33. The elastic member 37 is arranged in the support sleeve 33, one end of the elastic member 37 is fixed to the portion of the support sleeve 33 inside towards the support end cover 34, and the other end of the elastic member 37 is fixed to the end of the support slide 35 inserted into the support sleeve 33. The elastic member 37 includes but is not limited to a rubber block, a spring and the like.

[0023] As shown, Figure 1 As shown, the second support plates 14 are fixedly arranged on the connecting pipes 10 and the intermediate pipe 13 located on both sides of the extension direction of the corrugated pipe 12. A plurality of auxiliary support rods are arranged between the two second support plates 14 along the circumferential direction of the connecting pipe 10. The auxiliary support rod comprises an auxiliary sleeve 20, an auxiliary end cover 21, an auxiliary threaded rod 22 and an auxiliary nut 23. The auxiliary sleeve 20 is hollow and has a second opening opened in one direction along the axial direction. One end of the auxiliary sleeve 20 extends to one second support plate 14 and penetrates the second support plate 14. One end of the auxiliary threaded rod 22 is inserted into the auxiliary sleeve 20 through the second opening of the auxiliary sleeve 20 and is threadedly connected with the auxiliary sleeve 20. The other end of the auxiliary threaded rod 22 extends to the other second support plate 14 and penetrates the second support plate 14. The auxiliary nut 23 is sleeved on the end of the auxiliary threaded rod 22 located at the second support plate 14, and the auxiliary nut 23 is threadedly connected with the second support plate 14 and abuts against the end surface of the second support plate 14 away from the auxiliary sleeve 20. The auxiliary end cover 21 is fixedly arranged at the end of the auxiliary sleeve 20 located at one end of the second support plate 14, and abuts against the end surface of the second support plate 14 away from the auxiliary sleeve 20. The auxiliary sleeve 20 and the auxiliary threaded rod 22 are made of elastic material, and the material types include but are not limited to rubber, glass fiber composite material and the like.

[0024] In one embodiment, the support sleeve 33 and the support slide rod 35 are also made of elastic material, allowing the support sleeve 33 and the support slide rod 35 to undergo elastic bending deformation. When the parallel compensator is used in a position where the two pipelines are severely misaligned, the horizontal compensator is supported by the bending deformation of the auxiliary sleeve 20, the auxiliary threaded rod 22, the fixing block 30, and the support slide rod 35, thereby increasing the compensation limit of the horizontal compensator and resisting the misalignment movement of the pipeline, reducing the amplitude of the misalignment movement, and thus improving the service life of the horizontal compensator.

[0025] The two connecting pipes 10 are fixedly connected to the flanges at opposite ends of the two external pipe sections through connecting flanges 11. When the two pipe sections move relative to each other or move away from each other, the two connecting pipes 10 pull the bellows 12 to expand or contract axially, so that the connection between the two pipe sections can be compensated for in real time, thereby avoiding the pipe connection from breaking and improving the service life of the pipe. At the same time, the use of a detachable connection structure for the support structure can improve the ease of installation of the horizontal compensator.

[0026] The support structure adopts a detachable connection between the mating block 31 and the rotating block 16, so that the number of support rods can be changed in real time according to different usage environments. During installation, the mating block 31 is placed at the end of the rotating block 16 away from the first support plate 15, and the through hole 32 is aligned with the threaded hole 17 to form a connection hole. Then, a bolt is inserted into the connection hole to fix the through hole 32 and the threaded hole 17, thereby completing the fixation of the mating block 31 and the rotating block 16. The installation operation is convenient.

[0027] Traditional horizontal compensators, when faced with bending and connecting conditions (i.e., when the axial directions of the two pipe sections are at an angle), will cause the support rod to bend and deform. This leads to the support rod being in a constant bending state and causing structural fatigue, reducing its service life. However, by incorporating a rotatable rotating block 16, when the two pipe sections are on the same plane but not on the same axis, the two connecting pipes 10 can be aligned axially with and connected to the two pipe sections via the bent bellows 12. The horizontal compensator is then in a bent state, as shown below. Figure 4 As shown, by rotating the rotating block 16, the rotating block 16 rotates along the axis of rotation, eventually making the rotating blocks 16 on the two first support plates 15 parallel to each other. Then, the support rod is installed. At this time, the support rod can still maintain axial straightness and support the horizontal compensator, and the support rod does not bend or deform. Since the bellows 12 is already bent at this time, when the two sections of the pipeline move relative to each other, the bellows 12 will bend further. At this time, the support rod can provide elastic support for the further bending of the bellows 12 in the horizontal compensator, thereby improving the installation adaptability of the horizontal compensator.

[0028] First, insert one end of the support sleeve 33 onto a fixed block 30, ensuring the support end cap 34 abuts against the fixed block 30. Then, move the support slide rod 35 axially to align it with the spacing between the two fixed blocks 30. Next, pass the support slide rod 35 through another fixed block 30 and screw the support nut 36 into the end of the support slide rod 35, ensuring the support nut 36 abuts against the fixed block 30. Since the spacing between the two fixed blocks 30 is fixed, the support slide rod 35 and the support sleeve 33 will not move relative to each other. This completes the installation of the support rod. When the two pipe sections move axially in the same horizontal plane, the two connecting pipes 10 will move relative to each other, which in turn will drive the two fixed blocks 30 to move relative to each other through the rigid connection. At this time, the support slide rod 35 and the support sleeve 33 will move relative to each other. Due to the action of the elastic element 37, the elastic force is always provided for the support sleeve 33 and the support slide rod 35 to return to the initial state. When the two pipe sections are restored, the support rod will also return to the initial state, so that the connection between the two pipe sections has the ability to automatically reset, and the horizontal compensator can operate normally when there is axial relative movement between the two pipe sections.

[0029] Insert the auxiliary sleeve 20 into the second support plate 14, so that the auxiliary end cap 21 abuts against the second support plate 14. Then, by rotating the auxiliary threaded rod 22, the auxiliary threaded rod 22 is moved out of or retracted into the auxiliary sleeve 20 to adapt to the spacing of the second support plates 14. Finally, the end of the auxiliary threaded rod 22 away from the auxiliary sleeve 20 passes through the other second support plate 14, and the auxiliary nut 23 is screwed into the end of the auxiliary threaded rod 22, so that the auxiliary nut 23 abuts against the other second support plate 14, thus completing the installation of the auxiliary support rod. In the case of radial misalignment between the two pipe sections, it will drive two... When the connecting pipe 10 is radially misaligned, the two bellows 12 will bend and deform to compensate for the misaligned sections of the pipe. At the same time, the auxiliary sleeve 20 and the auxiliary threaded rod 22 will also bend elastically to support the connection between the intermediate pipe 13 and the connecting pipe 10, preventing the bellows 12 from being damaged by excessive deformation. After the two pipe sections return to their initial state, the elastic deformation of the auxiliary sleeve 20 and the auxiliary threaded rod 22 can be reset, which can further promote the bellows 12 to return to its initial state. This allows the horizontal compensator to operate normally under the condition of radial misalignment of the two pipe sections, which is beneficial to improving the adaptability range of the horizontal compensator.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A horizontal compensator used for jacking concrete pumping inside a steel pipe column, characterized in that: include: There are two coaxially opposite connecting pipes (10), and a connecting flange (11) is fixedly installed at the end of the connecting pipe (10). Corrugated pipes (12) are fixedly installed at opposite ends of the two connecting pipes (10). The middle pipe (13) is fixedly connected at both ends to the ends of the two corrugated pipes (12) away from the connecting pipe (10). The first support plate (15) is fixed on the connecting pipe (10). A support structure is provided on the radial side of the connecting pipe (10) and is detachably connected to the first support plate (15). The support structure is used to provide support force for the relative movement of the two connecting pipes (10).

2. The horizontal compensator for concrete pumping and jacking inside a steel pipe column according to claim 1, characterized in that: The supporting structure includes, The connector is mounted on the first support plate (15). The mating block (31) is detachably and fixedly connected to the connector. The fixing block (30) is fixed on the side of the mating block (31) away from the connector. A support rod extends axially along the connecting pipe (10) and is disposed on the radial side of the connecting pipe (10). The support rod is fixed to the fixing block (30) on the two first support plates (15) respectively, and the support rod undergoes elastic deformation along the axial direction.

3. A horizontal compensator for concrete pumping and jacking inside a steel pipe column according to claim 2, characterized in that: The connectors include: The rotating block (16) is located on the side of the first support plate (15) away from the connecting pipe (10), and the mating block (31) is detachably and fixedly connected to the rotating block (16). The rotating shaft is fixedly mounted on the first support plate (15). The axial direction of the rotating shaft extends radially along the connecting pipe (10) and is rotatably connected to the rotating block (16).

4. A horizontal compensator for concrete pumping and jacking inside a steel pipe column according to claim 3, characterized in that: The rotating block (16) has a threaded hole (17), and the mating block (31) has a through hole (32) aligned with the threaded hole (17). After the threaded hole (17) and the through hole (32) are aligned, a connecting hole is formed. A bolt is inserted into the connecting hole and is threadedly connected to the threaded hole (17).

5. A horizontal compensator for concrete pumping and jacking inside a steel pipe column according to claim 2, characterized in that: The support rod includes: The support sleeve (33) is hollow, and one end of the support sleeve (33) extends to a fixing block (30). The support slide rod (35) has one end inserted into the support sleeve (33), and the other end extends to another fixing block (30). A support nut (36) is sleeved on the end of the support slide rod (35) located on the fixed block (30). The support nut (36) is threadedly connected to the support slide rod (35), and the support nut (36) abuts against the side of the fixed block (30) away from the support sleeve (33). A support end cap (34) is provided at the end of the support sleeve (33) located on the fixed block (30). The support end cap (34) is fixedly connected to the support sleeve (33), and the support end cap (34) abuts against the side of the fixed block (30) away from the support sleeve (33). An elastic element (37) is provided inside the support sleeve (33). One end of the elastic element (37) is fixed to the part of the support sleeve (33) facing the support end cap (34), and the other end of the elastic element (37) is fixed to the end of the support slide rod (35) inserted into the support sleeve (33).

6. A horizontal compensator for concrete pumping and jacking inside a steel pipe column according to claim 1, characterized in that: A second support plate (14) is fixedly installed on the connecting pipe (10) and the intermediate pipe (13) on both sides of the extension direction of the corrugated pipe (12). A number of auxiliary support rods are arranged between the two second support plates (14) along the circumference of the connecting pipe (10).

7. A horizontal compensator for concrete pumping and jacking inside a steel pipe column according to claim 6, characterized in that: The auxiliary support rods include: The auxiliary sleeve (20) is hollow, and one end of the auxiliary sleeve (20) extends to a second support plate (14) and passes through the second support plate (14). An auxiliary threaded rod (22) has one end inserted into the auxiliary sleeve (20) and threadedly connected to the auxiliary sleeve (20). The other end of the auxiliary threaded rod (22) extends to another second support plate (14) and passes through the second support plate (14). An auxiliary nut (23) is fitted onto the end of the auxiliary threaded rod (22) located on the second support plate (14). The auxiliary nut (23) is threadedly connected to the second support plate (14) and abuts against the end face of the second support plate (14) away from the auxiliary sleeve (20). An auxiliary end cap (21) is fixed to the end of the auxiliary sleeve (20) located at one end of the second support plate (14). The auxiliary end cap (21) abuts against the end face of the second support plate (14) away from the auxiliary sleeve (20). The auxiliary sleeve (20) and the auxiliary threaded rod (22) are both made of elastic materials.

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