Pipeline telescopic connector and auxiliary mounting device thereof

Abstract

The invention relates to the technical field of pipeline connecting devices, and discloses a telescopic pipeline connector and an auxiliary mounting device thereof, and the telescopic pipeline connector comprises a telescopic structure, an anti-retreating locking structure and the auxiliary mounting device. The telescopic structure achieves adjustment of the pipeline length through a telescopic sleeve and a connecting pipe, and meanwhile the sealing performance and stability are guaranteed. The anti-retreating locking structure achieves tight locking and sealing of the pipeline and the telescopic structure through a conical sealing ring, a locking ring and a thorn claw, and the stability of the pipeline during thermal expansion and cold contraction is guaranteed. According to the auxiliary mounting device, the supporting seat and the clamping assembly are matched with the stepping motor and the two-way screw rod, so that the pipelines with different diameters are accurately adjusted and clamped, the mounting process is simplified, and the mounting efficiency and safety are improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline connection devices, in particular to a pipeline telescopic connector and an auxiliary installation device thereof. Background Art

[0002] Traditional pipe expansion connectors mostly use elastic materials and eccentric structures to achieve expansion and contraction functions, but as the pipe moves and the temperature changes, these connectors often have problems such as poor sealing, insufficient anti-retraction performance, and complex installation and debugging. In order to improve the performance of connectors, expansion joint products have appeared on the market. These products have good expansion and contraction performance and can effectively alleviate the stress and deformation caused by temperature changes, vibrations and displacements in the pipeline system. However, their installation usually relies on flange connections. If you encounter pipes or working conditions where flanges cannot be welded, the applicability of the expansion joint will be reduced.

[0003] In addition, existing pipeline telescopic connectors have significant deficiencies in terms of sealing, anti-retraction performance, installation complexity, and applicability; specifically, the risk of leakage caused by poor sealing, loosening of pipelines due to insufficient anti-retraction performance, increased costs due to complex installation and commissioning, and the limitations of flange connections under specific pipe materials or working conditions. These problems limit the application effect and safety of pipeline telescopic connectors in critical infrastructure.

[0004] Therefore, we propose a pipeline telescopic connector and an auxiliary installation device thereof to solve the problems in the above background. Summary of the invention

[0005] The object of the present invention is to provide a pipe telescopic connector and an auxiliary installation device thereof, so as to solve the problem that the conventional pipe telescopic connector proposed in the above background technology is connected by welding flanges, which limits its use conditions and is inconvenient to install.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A pipeline telescopic connector comprises a connecting flange connected to a valve or a pipeline interface and a telescopic structure, the telescopic structure is installed and connected to the connecting flange, and is used to realize the telescopic extension of the pipeline; the telescopic structure comprises a telescopic sleeve, a connecting pipe, and a guide flange, the connecting pipe is used to communicate with the pipeline, the guide flange is fixedly connected to the outer wall of the connecting pipe, the connecting pipe extends to the outside of both sides of the guide flange, one end of the telescopic sleeve is fixedly connected to the connecting flange, and the other end is sleeved outside the connecting pipe, the telescopic sleeve and the connecting pipe have a relative telescopic function, and the end of the telescopic structure away from the flange is provided with an anti-retraction locking structure for locking and fixing the pipeline.

[0008] An auxiliary installation device for a pipe telescopic connector, used for installing a pipe telescopic connector as described in any one of claims 1 to 9, comprising a supporting seat and a clamping assembly, the clamping assembly comprising an adjusting seat, a first clamping jaw and a second clamping jaw, the first clamping jaw and the second clamping jaw are respectively slidably connected to the adjusting seat, a bidirectional screw is installed inside the adjusting seat, the first clamping jaw and the second clamping jaw are symmetrically installed on both sides of the bidirectional screw, and a stepping motor is installed at one end of the bidirectional screw; the adjusting seat comprises a base, an electric push rod and a sliding seat, the electric push rod is installed between the base and the sliding seat, a plurality of clamping assemblies are provided, and the plurality of clamping assemblies are slidably connected to the sliding seat, one group of the clamping assemblies is clamped and fixed to the outside of the pipe telescopic connector, and is clamped and fixed to the outer wall of the connecting pipe of the pipe telescopic connector through the first clamping jaw and the second clamping jaw; another group of the clamping assemblies is clamped and fixed to the outer wall of the pipe, so that the pipe telescopic connector and the pipe are on the same axis.

[0009] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0010] The pipeline telescopic connector of the present invention can effectively solve the problems of thermal expansion and contraction of the pipeline and length adjustment, and ensure the stability and sealing of the connection; the connector uses the relative telescopic function of the telescopic sleeve and the connecting pipe to adjust the length of the pipeline. At the same time, the anti-retraction locking structure is connected to the pipeline by arranging a first flange part at the end of the connecting pipe away from the telescopic sleeve, and cooperates with the conical sealing ring, the locking ring and the thorn claw to achieve sealing and locking. The specific working principle is: one end of the pipe passes through the locking ring, the circumferentially distributed thorn claws and the inside of the conical sealing ring, and the thorn claws are engaged and fixed with the outer wall of the pipe by rotating the fastening nut, and at the same time the conical sealing ring tightens one end of the clamping surface of the thorn claw to achieve sealing; under the thermal expansion and contraction of the pipe or the action of external force, the conical sealing ring and the thorn claws, as well as the thorn claws and the outer wall of the pipe restrain each other to prevent the pipe from sliding or detaching, reaching an interlocking state, ensuring the stability of the pipe connection, preventing the pipe from sliding or detaching under the action of thermal expansion and contraction or external force, and improving the connection stability; the auxiliary installation device of the present invention simplifies the installation process, reduces labor costs, and improves installation efficiency through the support seat and the adjustable clamping assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the expanded structure of the pipeline telescopic connector of the present invention;

[0012] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure at point A;

[0013] Figure 3 For the present invention Figure 1 A schematic diagram of the enlarged structure at B;

[0014] Figure 4 For the present invention Figure 1 A schematic diagram of the enlarged structure at C;

[0015] Figure 5 This is a schematic diagram of the assembly structure of the pipeline telescopic connector of the present invention;

[0016] Figure 6 For the present invention Figure 5 A schematic diagram of the structure at D of FIG.

[0017] Figure 7 It is a schematic diagram of the structure of the conical sealing ring of the present invention;

[0018] Figure 8 It is a schematic diagram of the structure of the auxiliary installation device of the present invention.

[0019] Wherein: 1. connecting flange; 2. telescopic structure; 3. anti-retraction locking structure; 4. telescopic sleeve; 5. connecting pipe; 6. guide flange; 8. first sealing ring; 9. first sealing gland; 11. first connecting rod; 12. first locking nut; 14. guide rod; 15. first flange; 16. conical sealing ring; 17. locking ring; 18. thorn claw; 19. rotating shaft; 20. bushing; 21. tightening spring; 22. clamping surface; 23. anti-slip teeth; 24. annular chamfered groove; 25. hexagonal bolt; 26. fastening nut; 27. expansion nail; 31. compression spring; 32. support seat; 33. adjustment seat; 34. first clamping jaw; 35. second clamping jaw; 38. base; 39. electric push rod; 40. sliding seat. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1:

[0022] See also Figure 1-8 , the present invention provides a technical solution:

[0023] A pipeline telescopic connector comprises a connecting flange 1, a telescopic structure 2 and an anti-retraction locking structure 3. One end of the connecting flange 1 is connected and fixed to a valve, the telescopic structure 2 is installed and connected to the other end of the connecting flange 1, and the anti-retraction locking structure 3 is installed at the end of the telescopic structure 2 away from the flange. The anti-retraction locking structure 3 is used to connect the pipeline and the telescopic structure 2, and while ensuring its sealing effect, it prevents the pipeline from retreating to the outside of the telescopic structure 2, causing the problem of detachment.

[0024] The telescopic structure 2 includes a telescopic sleeve 4, a connecting pipe 5, and a guide flange 6. The connecting pipe 5 is used to connect the pipes 5. The guide flange 6 is fixedly connected to the outer wall of the connecting pipe 5. The connecting pipe 5 extends to the outside of both sides of the guide flange 6. One end of the telescopic sleeve 4 is fixedly connected to the connecting flange 1, and the other end is sleeved outside the connecting pipe 5. The telescopic sleeve 4 and the connecting pipe 5 have a relative telescopic function.

[0025] The telescopic structure 2 further includes a first sealing assembly, a first connecting assembly, a guide flange 6 and a guide rod 14 .

[0026] The first sealing assembly includes a first sealing ring 8 and a first sealing gland 9 , which are used to seal the interface between the connecting pipe 5 and the telescopic sleeve 4 .

[0027] The first connecting assembly includes a plurality of first connecting rods 11 and a first locking nut 12, which connect the telescopic sleeve 4 and the first sealing gland 9 to achieve connection and locking.

[0028] The guide flange 6 and the guide rod 14 are used for guiding, connecting and limiting the position of the telescopic sleeve 4 .

[0029] The working principle of the above scheme is: the telescopic sleeve 4 is connected to the connecting pipe 5 through the first connecting component, and sealing is achieved through the first sealing cover 9 and the first sealing ring 8; the other end of the connecting pipe 5 is connected to the pipeline through the anti-retraction locking structure 3, and a locking seal is achieved. The guide flange 6 and the guide rod 14 are used to guide and limit the position of the telescopic sleeve 4 to ensure the stability of the connection.

[0030] The anti-retraction locking structure 3 includes a first flange portion 15, a conical sealing ring 16, a locking ring 17 and a plurality of thorn claws 18. The first flange portion 15 is fixedly connected to one end of the connecting pipe 5 away from the telescopic sleeve 4. The plurality of thorn claws 18 are distributed in a circular array on one side of the locking ring 17 close to the first flange. The thorn claws 18 are rotatably connected to the locking ring 17. The conical sealing ring 16 is arranged between the thorn claws 18 and the first flange portion 15.

[0031] The locking ring 17 is annular and has locking holes around it. A rotation groove is provided on one side of the locking ring 17 close to the thorn claw 18. A rotating shaft 19 is installed inside the rotating groove. A shaft sleeve 20 is integrally formed on one end of the thorn claw 18 close to the locking ring 17. When the thorn claw 18 is installed, the shaft sleeve 20 is set inside the rotating groove, and the rotating shaft 19 passes through the shaft sleeve 20, and the thorn claw 18 rotates around the rotating shaft 19.

[0032] Furthermore, a tightening spring 21 is provided between the shaft sleeve 20 and the rotating groove of the ratchet pawl 18. The tightening spring 21 is sleeved on the outside of the rotating shaft 19, one end of which is fixedly connected to the shaft sleeve 20, and the other end of which is connected to the inner wall of the rotating groove; in the initial state, the tightening spring 21 pulls the ratchet pawl 18 to rotate inwardly through elastic force, and the end of the ratchet pawl 18 away from the locking ring 17 approaches the axial direction of the locking ring 17, and several ratchet pawls 18 rotate inwardly at the same time to form a tightened state, which is used to clamp and fix the installed pipe. The tightening spring 21 pulls the ratchet pawl 18 to engage and fix it with the outer wall of the pipe, so that pipes of different diameters can be clamped, and it is effectively suitable for thermal expansion and contraction of the pipe.

[0033] The thorn claw 18 is arc-shaped, and the inner side of the arc-shaped thorn claw 18 faces the axial direction of the locking ring 17. A clamping surface 22 is provided at one end of the thorn claw 18 away from the locking ring 17. In the tightened state, the clamping surface 22 of the thorn claw 18 fits against the outer wall of the pipe, and anti-slip teeth 23 are provided on the clamping surface 22. Under the action of the tightening spring 21, the anti-slip teeth 23 on the thorn claw 18 are clamped against the outer surface of the pipe to prevent it from sliding.

[0034] Furthermore, an annular chamfered groove 24 is provided on the inner side of the conical sealing ring 16, and the outer side of one end of the thorn claw 18 close to the clamping surface 22 is provided with an arc surface. The annular chamfered groove 24 of the conical sealing ring 16 matches the arc surface on the thorn claw 18. During installation, the annular chamfered groove 24 of the conical sealing ring 16 is engaged with the outer side of the arc surface on the thorn claw 18, and the annular chamfered groove 24 of the conical sealing ring 16 is conducive to the simultaneous tightening of several thorn claws 18 distributed in a circular array.

[0035] Furthermore, the first flange portion 15 is connected to the locking ring 17 by fasteners, and the fasteners include hexagonal bolts 25 and fastening nuts 26. Pin hole seats are arranged around the first flange portion 15, and a hexagonal groove matching the head of the hexagonal bolt 25 is provided on the side of the pin hole seat away from the fastening ring.

[0036] When the hexagonal bolt 25 is installed, its rod passes through the pin hole seat and the locking hole seat of the locking ring 17, and is locked with the fastening nut 26, so that the first flange part 15 and the locking ring 17 are fixedly connected by the hexagonal bolt 25 and the fastening nut 26;

[0037] Furthermore, an expansion nail 27 is installed outside the hexagonal bolt 25 at the installation position of the fastening nut 26 to prevent the fastening nut 26 from loosening and falling off. One end of the expansion nail 27 is a nail cap, and the other end is a conical expansion portion that can be opened outwards;

[0038] The shank of the hexagonal bolt 25 is provided with a nail hole, and the expansion nail 27 is installed in the nail hole. When the conical expansion portion of the expansion nail 27 passes through the nail hole, it expands to prevent it from falling off.

[0039] Furthermore, a compression spring 31 is installed between the fastening nut 26 and the lock hole seat. The compression spring 31 is sleeved on the rod of the hexagonal bolt 25. When the fastening nut 26 is installed, the compression spring 31 is fully compressed. When the fastening nut 26 is loosened, the movable gap between the fastening nut 26 and the lock hole seat is locked through the elastic extension of the fastening nut 26 to prevent it from loosening, so that the first flange portion 15 and the locking ring 17 still maintain a stable and tight connection.

[0040] When installing the pipeline, first fix the connecting flange 1 to the valve to be connected, then assemble and connect the telescopic structure 2 and the first sealing structure, and then connect and fix the pipeline to the connecting pipe 5 inside the first flange part 15 through the anti-retraction locking structure 3;

[0041] Pass one end of the pipe through the locking ring 17, the circumferentially distributed thorn claws 18 and the inside of the conical sealing ring 16, and the narrower end of the conical sealing ring 16 is close to the first flange part 15. Then, the pipe, the conical sealing ring 16, the locking ring 17 and the thorn claws 18 are moved together close to the connecting pipe 5. Then, the first flange part 15 and the locking ring 17 are connected and fixed according to the installation description of the above-mentioned hexagonal bolt 25. When the fastening nut 26 is turned to gradually lock, the arc surface on the thorn claw 18 is engaged with the inside of the annular chamfered groove 24 of the conical sealing ring 16, so that the conical sealing ring 16 tightens one end of the clamping surface 22 of the thorn claw 18 and tightly grasps the outer wall of the pipe. At the same time, the circumferentially distributed thorn claws 18 press the conical sealing ring 16 close to the first flange part 15, so that the gap between the pipe and the connecting pipe 5 is sealed to prevent leakage.

[0042] When the pipeline expands and contracts due to heat and cold, the circumferentially distributed thorn claws 18 rotate slightly to always fit tightly with the outside of the pipeline to prevent the pipeline from sliding. The conical sealing ring 16 is always in an extruded state to ensure the sealing of the pipeline connection. When the pipeline is pulled by an external force to move in the direction of disengaging from the locking ring 17, the conical sealing ring 16 tightly sleeved on the outside of the pipeline is pulled at the same time, and the conical sealing ring 16 tends to approach the thorn claws 18, thereby further tightening the circumferentially distributed thorn claws 18 to achieve a further locking state of the pipeline. At the same time, the thorn claws 18 generate resistance to the conical sealing ring 16 to prevent it from sliding outward, and the conical sealing ring 16 then generates resistance to the outward sliding of the pipeline, thereby achieving an interlocking state, effectively preventing the pipeline from being disconnected, and greatly improving the stability of the connection.

[0043] An auxiliary installation device for a pipe telescopic connector includes a support seat 32 and a clamping assembly, wherein the clamping assembly includes an adjustment seat 33, a first clamping jaw 34 and a second clamping jaw 35, wherein the first clamping jaw 34 and the second clamping jaw 35 are respectively slidably connected to the adjustment seat 33, and the adjustment seat 33 is equipped with a bidirectional screw, wherein the first clamping jaw 34 and the second clamping jaw 35 are symmetrically installed on both sides of the bidirectional screw, and a stepping motor is installed at one end of the bidirectional screw, and the bidirectional screw is driven to rotate by the stepping motor. Since the threads on both sides of the bidirectional screw are in opposite directions, the first clamping jaw 34 and the second clamping jaw 35 are moved closer or farther away, and the distance between the first clamping jaw 34 and the second clamping jaw 35 is adjusted, so that pipes of different diameters can be stably clamped.

[0044] The adjustment seat 33 includes a base 38, an electric push rod 39 and a sliding seat 40. The electric push rod 39 stably connects the base 38 and the sliding seat 40. After the base 38 is fixed, the height of the sliding seat 40 is adjusted by telescoping the electric push rod 39. A plurality of clamping assemblies are provided, and the plurality of clamping assemblies are slidably connected to the sliding seat 40 to adjust the position. The pipe is clamped by the clamping assembly to stabilize it in the radial direction of the locking ring 17, and then the clamping assembly is slid to connect the pipe to the anti-retraction locking structure 3 to install and fix it. This structure keeps the pipe stable and can be installed with fewer workers. There is no need to manually support the pipe during the connection process, which is convenient and labor-saving, and improves installation efficiency.

[0045] The working principle of the pipeline telescopic connector is: through the relative telescopic function between the telescopic sleeve 4 and the connecting pipe 5, the length of the pipeline is adjusted, while ensuring the sealing and stability of the pipeline. The working principle of the anti-retraction locking structure 3 is to achieve tight locking and sealing between the pipeline and the telescopic structure 2 through the fixed connection between the first flange part 15 and the connecting pipe 5, and the combination of the conical sealing ring 16, the locking ring 17 and the thorn claw 18. Specifically, the conical sealing ring 16 is used for sealing, and it is clamped between the outer arc surface of the thorn claw 18 and the first flange during installation; when the pipeline is subjected to axial outward force, the arc surface on the thorn claw 18 is clamped inside the annular chamfered groove 24 of the conical sealing ring 16, so that the thorn claw 18 is further tightened, and at the same time, the thorn claw 18 prevents the conical sealing ring 16 from moving outward, thereby achieving a tight and stable connection between the pipeline and the connecting pipe 5. In addition, the function of the tightening spring 21 is to maintain the close contact between the thorn claw 18 and the outer wall of the pipe to prevent the pipe from sliding due to thermal expansion and contraction, while the locking ring 17 and the fastening nut 26 fix the first flange part 15 and the locking ring 17 through fasteners to ensure the stability and reliability of the entire anti-retraction locking structure 3.

[0046] The working principle of an auxiliary installation device for a pipe telescopic connector is to provide adjustably supported pipes through the cooperation of a support seat 32 and a clamping assembly, so as to facilitate the installation and connection between the pipe and the telescopic connector. A stepper motor is used to drive a bidirectional screw to achieve precise adjustment and clamping of pipes of different diameters. Multiple groups of clamping assemblies are slidably connected to an adjustment seat 33, and the position can be flexibly adjusted for precise installation. The auxiliary installation device can reduce heavy manual work and improve installation efficiency.

[0047] Although specific embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the specific embodiments without departing from the principles and spirit thereof, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pipeline telescopic connector, characterized in that: The invention comprises a connecting flange (1) connected to a valve or a pipeline interface and a telescopic structure (2), wherein the telescopic structure (2) is installed and connected to the connecting flange (1) and is used to realize the telescopic movement of the pipeline; the telescopic structure (2) comprises a telescopic sleeve (4), a connecting pipe (5) and a guide flange (6), wherein the connecting pipe (5) is used to communicate with the pipeline, the guide flange (6) is fixedly connected to the outer wall of the connecting pipe (5), the connecting pipe (5) extends to the outside of both sides of the guide flange (6), one end of the telescopic sleeve (4) is fixedly connected to the connecting flange (1), and the other end thereof is sleeved outside the connecting pipe (5), the telescopic sleeve (4) and the connecting pipe (5) have a relative telescopic function, and an anti-retraction locking structure (3) for locking and fixing the pipeline is arranged at one end of the telescopic structure (2) away from the flange.

2. A pipeline telescopic connector according to claim 1, characterized in that: The telescopic structure (2) further comprises a first sealing assembly, a first connecting assembly, a guide flange (6) and a guide rod (14); the first sealing assembly comprises a first sealing ring (8) and a first sealing gland (9) which are used to seal the interface between the connecting pipe (5) and the telescopic sleeve (4).

3. A pipeline telescopic connector according to claim 2, characterized in that: The first connection assembly comprises a plurality of first connection rods (11) and a first locking nut (12), which connect the telescopic sleeve (4) and the first sealing cover (9) to achieve connection and locking; the guide flange (6) and the guide rod (14) cooperate to guide the telescopic movement between the telescopic sleeve (4) and the connecting pipe (5).

4. A pipeline telescopic connector according to claim 3, characterized in that: The anti-retraction locking structure (3) comprises a first flange portion (15), a conical sealing ring (16), a locking ring (17) and a plurality of thorn claws (18); the first flange portion (15) is fixedly connected to an end of the connecting pipe (5) away from the telescopic sleeve (4); the plurality of thorn claws (18) are distributed in a circular array on a side of the locking ring (17) close to the first flange; the thorn claws (18) are rotatably connected to the locking ring (17); and the conical sealing ring (16) is arranged between the thorn claws (18) and the first flange portion (15).

5. A pipeline telescopic connector according to claim 4, characterized in that: The locking ring (17) is annular and has locking hole seats arranged around it. A rotation groove is arranged on one side of the locking ring (17) close to the thorn claw (18), and a rotating shaft (19) is installed inside the rotation groove. A shaft sleeve (20) is integrally formed on one end of the thorn claw (18) close to the locking ring (17).

6. A pipeline telescopic connector according to claim 5, characterized in that: The shaft sleeve (20) is arranged inside the rotating groove, and the rotating shaft (19) passes through the shaft sleeve (20). A tightening spring (21) is arranged between the shaft sleeve (20) of the pawl (18) and the rotating groove. The tightening spring (21) is sleeved outside the rotating shaft (19), one end of which is fixedly connected to the shaft sleeve (20), and the other end of which is connected to the inner wall of the rotating groove. In the initial state, the tightening spring (21) pulls the pawl (18) to rotate inwardly by elastic force, and the end of the pawl (18) away from the locking ring (17) approaches the axis direction of the locking ring (17), and a plurality of pawls (18) rotate inwardly at the same time, forming a tightened state.

7. A pipeline telescopic connector according to claim 6, characterized in that: The thorn claw (18) is arc-shaped, and the inner side of the arc-shaped thorn claw (18) faces the axial direction of the locking ring (17). A clamping surface (22) is provided at one end of the thorn claw (18) away from the locking ring (17). In a tightened state, the clamping surface (22) of the thorn claw (18) fits against the outer wall of the pipeline, and anti-slip teeth (23) are provided on the clamping surface (22). The anti-slip teeth (23) on the thorn claw (18) are clamped against the outer surface of the pipeline.

8. A pipeline telescopic connector according to claim 7, characterized in that: An annular chamfered groove (24) is arranged inside the conical sealing ring (16); an outer side of one end of the thorn claw (18) close to the clamping surface (22) is arranged as an arc surface; the annular chamfered groove (24) of the conical sealing ring (16) matches the arc surface on the thorn claw (18); when the annular chamfered groove (24) of the conical sealing ring (16) is engaged with the outer side of the arc surface on the thorn claw (18), a plurality of thorn claws (18) distributed in a circumferential array are tightened simultaneously.

9. A pipeline telescopic connector according to claim 6, characterized in that: An expansion nail (27) is arranged on the outside of the hexagonal bolt (25) at the installation position of the fastening nut (26) for preventing the fastening nut (26) from loosening and falling off; a compression spring (31) is installed between the fastening nut (26) and the lock hole seat, and the compression spring (31) is sleeved on the rod of the hexagonal bolt (25). When the fastening nut (26) is installed, the compression spring (31) is completely compressed, and the movable gap between the fastening nut (26) and the lock hole seat is locked through the elastic expansion of the fastening nut (26).

10. An auxiliary installation device for a pipe telescopic connector, used for installing a pipe telescopic connector according to any one of claims 1 to 9, characterized in that: The invention comprises a support seat (32) and a clamping assembly, wherein the clamping assembly comprises an adjusting seat (33), a first clamping jaw (34) and a second clamping jaw (35), wherein the first clamping jaw (34) and the second clamping jaw (35) are respectively slidably connected to the adjusting seat (33), a bidirectional screw is installed inside the adjusting seat (33), the first clamping jaw (34) and the second clamping jaw (35) are symmetrically installed on both sides of the bidirectional screw, and a stepping motor is installed at one end of the bidirectional screw; the adjusting seat (33) comprises a base (38), an electric push rod (39) and A sliding seat (40) and an electric push rod (39) are installed between the base (38) and the sliding seat (40). A plurality of clamping assemblies are provided. The plurality of clamping assemblies are slidably connected to the sliding seat (40). One group of clamping assemblies is clamped and fixed to the outside of the pipe telescopic connector and is clamped and fixed to the outer wall of the connecting pipe (5) of the pipe telescopic connector through a first clamping jaw (34) and a second clamping jaw (35); another group of clamping assemblies is clamped and fixed to the outer wall of the pipe, so that the pipe telescopic connector and the pipe are on the same axis.

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