Highly sealed polyethylene composite pipe

Abstract

The application relates to the technical field of composite pipe materials, and discloses a high-sealing-performance polyethylene composite pipe material, which comprises two polyethylene composite pipe bodies, a plurality of porous shunt holes are arranged in the interiors of the two polyethylene composite pipe bodies, an interface sealing compensation module is arranged on the connection position of the two polyethylene composite pipe bodies, and a connecting ring is fixedly arranged on the two sides of the interface sealing compensation module; the two connecting rings are arranged on the outer walls of the two polyethylene composite pipe bodies; the interface sealing compensation module can provide stable support for the pipe material, can prevent the outer wall from being broken due to too deep tooth shape, can prevent the tooth shape from being too shallow to cause the sealing joint to slide and release pressure after being pressurized, can effectively guarantee the success rate of static pressure test, can make the sealing effect stronger with greater pressure, can dynamically adapt to the interface gap fluctuation caused by geological change and temperature change, and can eliminate the risk of leakage.

Description

Technical Field

[0001] This invention relates to the field of composite pipe technology, specifically to a high-sealing polyethylene composite pipe. Background Technology

[0002] With the rapid development of modern industry and municipal engineering, the requirements for fluid transportation pipeline systems are increasing, especially in the field of transporting gases, high-purity liquids or toxic and harmful media. The sealing performance of pipelines is the key to ensuring safety and environmental benefits. Polyethylene pipes have been widely used in water supply, gas supply and other fields due to their good corrosion resistance, impact resistance and easy processing.

[0003] However, traditional sealing structures often use a single rubber ring or heat fusion connection, resulting in insufficient sealing surface fit. When faced with interface displacement caused by geological settlement during pipeline installation, as well as changes in operating conditions such as temperature cycling and pressure fluctuations, they are unable to adaptively fill tiny gaps, making them prone to media leakage or intrusion of external impurities. Moreover, some rely on single-point bolt tightening, leading to uneven stress on the interface, which can easily loosen after long-term use, making installation difficult and requiring complete replacement during maintenance, increasing operation and maintenance costs and wasting resources. Furthermore, sealing blind spots can easily form at the joints, posing a risk of cross-leakage when transporting different media, resulting in low construction efficiency and difficulty in guaranteeing sealing reliability under complex operating conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a high-sealing polyethylene composite pipe that solves the problems in the prior art of interface displacement caused by geological settlement during pipeline installation, as well as the difficulty in adaptively filling tiny gaps when faced with changes in working conditions such as temperature cycling and pressure fluctuations, which easily leads to media leakage or intrusion of external impurities, loosening after long-term use, and high installation difficulty.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A high-sealing polyethylene composite pipe, comprising:

[0007] Two polyethylene composite pipe bodies, each of which has multiple porous diversion holes inside;

[0008] An adaptive sealing mechanism is located on the outer wall of two polyethylene composite pipe bodies and is used to adapt and seal the connection between the two polyethylene composite pipe bodies. The adaptive sealing mechanism includes a pipe interface sealing compensation module sleeved at the connection between the two polyethylene composite pipe bodies and connecting ring sleeves fixedly installed on both sides of the pipe interface sealing compensation module. The two connecting ring sleeves are respectively installed on the outer wall of the two polyethylene composite pipe bodies. The outer wall of the two polyethylene composite pipe bodies is provided with auxiliary components for assisting the sealing of the pipe interface sealing compensation module.

[0009] The auxiliary components include auxiliary adhesive layers fixedly installed on one side of the two connecting ring sleeves and memory elastic sealing rings fixedly installed on one side of the two auxiliary adhesive layers. The two memory elastic sealing rings and the two auxiliary adhesive layers are all installed on the outer wall of the two polyethylene composite pipe bodies. The outer wall of the polyethylene composite pipe body is provided with a stabilizing component for assisting the pipe interface sealing compensation module.

[0010] The stabilizing component includes a fixing sleeve installed on the outer wall of the two polyethylene composite pipe bodies and a plurality of through slots opened on the two fixing sleeves. The two polyethylene composite pipe bodies are provided with a fixing component for fixing the two fixing sleeves on their exterior.

[0011] The fixing assembly includes multiple fixing plates fixedly installed on the outer walls of the two polyethylene composite pipe bodies and multiple fixing grooves formed on the inner wall of the fixing sleeve. The multiple fixing plates are located inside the multiple fixing grooves, and the fixing sleeve is fixed by the multiple fixing plates. A sealing mechanism is provided inside the opposite sides of the two polyethylene composite pipe bodies.

[0012] Each of the plurality of fixing plates is provided with fixing holes, and the fixing sleeve is provided with a plurality of through holes, and the plurality of through holes correspond one-to-one with the plurality of fixing holes;

[0013] Both of the fixing sleeves have multiple through slots, and both of the fixing sleeves are provided with multiple fixing rods. The bottom of each of the fixing rods passes through the through hole and is located inside the mounting slot.

[0014] Preferably, an elastic inductive expansion adhesive layer is fixedly installed on the opposite sides of both of the two fixed sleeves, and a pressure-sensitive sealant is provided on the outer wall of both of the polyethylene composite pipe bodies. The pressure-sensitive sealant is located between the memory elastic sealing ring and the elastic inductive expansion adhesive layer, and one end of the pressure-sensitive sealant is fixed to the elastic inductive expansion adhesive layer.

[0015] Preferably, the sealing mechanism includes a fixed sleeve fixedly installed inside one of the polyethylene composite pipe bodies, a connecting sleeve fixedly installed on one side of the fixed sleeve, and a connecting sleeve disposed at the end of the connecting sleeve away from the fixed sleeve. A stepped portion is fixedly installed between the connecting sleeve and the connecting sleeve. An auxiliary sealing leak-proof component is disposed inside the other polyethylene composite pipe body.

[0016] Preferably, the leak-proof component includes a stabilizing sleeve fixedly installed inside another polyethylene composite pipe body and a sealing sleeve fixedly installed on one side of the stabilizing sleeve, the connecting sleeve being located inside the sealing sleeve, and a stabilizing component for assisting the stabilization of the sealing sleeve being provided at the end of the sealing sleeve away from the stabilizing sleeve.

[0017] Preferably, the stabilizing component includes a fixed retaining ring sleeve fixedly installed at the end of the sealing sleeve away from the stabilizing sleeve, and a stabilizing retaining ring fixedly installed at the end of the fixed retaining ring sleeve away from the sealing sleeve. A receiving groove is provided on one side of another polyethylene composite pipe body, and a stepped plate is fixedly installed on one side of another polyethylene composite pipe body. The stabilizing retaining ring is located inside the receiving groove.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0019] This invention, through the adaptation of the sealing mechanism, provides stable support for the pipe, preventing outer wall fracture due to excessively deep teeth and preventing slippage and pressure loss of the sealing joint after pressurization due to excessively shallow teeth. It effectively ensures the success rate of static pressure and burst tests. Combined with pressure-sensitive sealant and sealing rubber gasket, it can automatically fill tiny gaps in the interface with the help of medium pressure. The greater the pressure, the stronger the sealing effect. At the same time, it dynamically adapts to the fluctuation of interface gap caused by geological changes and temperature changes, eliminating the risk of leakage, improving overall airtightness, blocking the intrusion of moisture, dust and chemicals, adapting to complex working conditions, reducing resource waste and maintenance costs, achieving long-term stable operation of the pipe, and meeting the sealing reliability requirements of industrial transportation.

[0020] This invention, through the setting of a sealing mechanism, can effectively prevent the leakage of liquid and gas media in pipelines, while blocking the intrusion of external dust, moisture and other impurities, avoiding wear and corrosion of internal components, and ensuring the long-term clean and stable operation of the pipeline system. At the same time, the modular structure makes the installation process simple and quick, without the need for complicated tools, and the detachable parts reduce the difficulty of maintenance and reduce labor and financial costs. In addition, the mechanism can also reduce noise and interface loss, extend the service life of the overall pipeline system, and fully meet the requirements of industrial transportation for sealing safety and adaptability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the sealing mechanism adapted to the present invention;

[0024] Figure 4 This is a schematic diagram illustrating the structure of the sealing mechanism of the present invention during disassembly.

[0025] Figure 5 This is a schematic diagram of the structure of the fixing sleeve of the present invention;

[0026] Figure 6 This is a schematic diagram of the sealing mechanism of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the stabilizing retaining ring of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the fixing ring sleeve of the present invention.

[0029] The components include: 1. Polyethylene composite pipe body; 2. Sealing sleeve; 3. Fixing sleeve; 4. Connecting sleeve; 5. Connecting sleeve; 6. Receiving groove; 7. Stabilizing sleeve; 8. Retaining retaining ring; 9. Stepped plate; 10. Fixing retaining ring sleeve; 11. Pipe interface sealing compensation module; 12. Connecting ring sleeve; 13. Pressure-sensitive sealant; 14. Fixing retaining sleeve; 15. Elastic sensing expansion adhesive layer; 16. Fixing plate; 17. Mounting slot; 18. Fixing insert; 19. Auxiliary adhesive layer; 20. Memory elastic sealing ring; 21. Through groove; 22. Stepped section; 23. Multi-hole diversion hole. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please refer to Figure 1 and Figure 2 A high-sealing polyethylene composite pipe includes: two polyethylene composite pipe bodies 1, each of which has multiple porous diversion holes 23 inside.

[0032] Please refer to Figure 3 and Figure 4An adaptive sealing mechanism is located on the outer wall of the two polyethylene composite pipe bodies 1 and is used to adapt and seal the connection between the two polyethylene composite pipe bodies 1. The adaptive sealing mechanism includes a pipe interface sealing compensation module 11 sleeved at the connection between the two polyethylene composite pipe bodies 1 and connecting ring sleeves 12 fixedly installed on both sides of the pipe interface sealing compensation module 11. The two connecting ring sleeves 12 are respectively installed on the outer wall of the two polyethylene composite pipe bodies 1. The outer wall of the two polyethylene composite pipe bodies 1 is provided with auxiliary components for assisting the sealing of the pipe interface sealing compensation module 11. The auxiliary components include auxiliary adhesive layers 19 fixedly installed on one side of the two connecting ring sleeves 12 and memory elastic sealing rings 20 fixedly installed on one side of the two auxiliary adhesive layers 19. The two memory elastic sealing rings 20 and the two auxiliary adhesive layers 19 are all installed on the outer wall of the two polyethylene composite pipe bodies 1. The outer wall of the polyethylene composite pipe body 1 is provided with stabilizing components for assisting the pipe interface sealing compensation module 11.

[0033] In use, first align the two polyethylene composite pipe bodies 1, ensuring the positions of the internal porous diversion holes 23 correspond. Then, fit the pipe interface sealing compensation module 11 onto the connection between the two polyethylene composite pipe bodies 1. Next, install the two connecting ring sleeves 12 on the outer walls of the two polyethylene composite pipe bodies 1 respectively, so that they are tightly attached to both sides of the pipe interface sealing compensation module 11, completing the basic assembly of the sealing mechanism. Then, fix the auxiliary adhesive layer 19 on one side of each of the two connecting ring sleeves 12, and then fix the memory elastic sealing ring 20 on one side of the auxiliary adhesive layer 19, ensuring that the auxiliary adhesive layer 19 and the memory elastic sealing ring 20 are tightly attached to the outer wall of the polyethylene composite pipe body 1. The adhesion of the auxiliary adhesive layer 19 enhances the connection stability, and the elastic deformation of the memory elastic sealing ring 20 further fills the gap, achieving a better sealing effect for the auxiliary pipe interface sealing compensation module 11. Subsequently, it can be further reinforced with a stabilizing component to ensure the sealing reliability and structural stability of the connection between the two polyethylene composite pipe bodies 1.

[0034] Furthermore, such as Figure 5As shown, the stabilizing assembly includes fixing sleeves 14 installed on the outer walls of the two polyethylene composite pipe bodies 1 and multiple through slots 21 formed on the two fixing sleeves 14. The two polyethylene composite pipe bodies 1 are externally provided with fixing components for fixing the two fixing sleeves 14. The fixing components include multiple fixing plates 16 fixedly installed on the outer walls of the two polyethylene composite pipe bodies 1 and multiple fixing grooves formed on the inner walls of the fixing sleeves 14. The multiple fixing plates 16 are located inside the multiple fixing grooves, and the fixing sleeves 14 are fixed by the multiple fixing plates 16. Sealing mechanisms are provided on the opposite sides of the two polyethylene composite pipe bodies 1. Based on this, after completing the corresponding basic assembly and auxiliary sealing component installation, the two fixing sleeves 14 are respectively fitted onto the outer walls of the two polyethylene composite pipe bodies 1, ensuring that the multiple fixing grooves on the inner walls of the fixing sleeves 14 are precisely aligned with the multiple fixing plates 16 on the outer walls of the polyethylene composite pipe bodies 1. This process involves fully embedding multiple fixing plates 16 into their corresponding fixing slots, achieving initial positioning of the fixing sleeve 14, and ensuring that the multiple through slots 21 on the fixing sleeve 14 are in an easily accessible position. Next, the multiple fixing holes on the fixing plates 16 are checked against the multiple through holes on the fixing sleeve 14 to ensure a one-to-one correspondence. Then, the multiple fixing rods 18 of the fixing assembly are aligned with their corresponding through holes, and the bottom of the fixing rod 18 is inserted through the through hole and into the mounting slot 17, completing a stable connection between the fixing sleeve 14 and the polyethylene composite pipe body 1. The fixing sleeve 14 provides lateral support to the pipe interface sealing compensation module 11, further enhancing the structural stability of the connection. Subsequently, the elastic inductive expansion adhesive layer 15 on the opposite side of the fixing sleeve 14, in conjunction with the pressure-sensitive sealant 13, improves the overall sealing performance and provides a stable installation foundation for the sealing mechanisms inside the two polyethylene composite pipe bodies 1 on opposite sides.

[0035] Furthermore, such as Figure 3 - Figure 5As shown, each of the multiple fixing plates 16 has fixing holes, and each of the fixing sleeves 14 has multiple through holes, which correspond one-to-one with the fixing holes. Each of the two fixing sleeves 14 has multiple through slots 21, and each of the two fixing sleeves 14 is provided with multiple fixing rods 18. The bottoms of the fixing rods 18 penetrate through the through holes and are located inside the mounting slots 17. Elastic inductive expansion adhesive layers 15 are fixedly installed on opposite sides of the two fixing sleeves 14. Pressure-sensitive sealant 13 is provided on the outer walls of the two polyethylene composite pipe bodies 1. The pressure-sensitive sealant 13 is located between the memory elastic sealing ring 20 and the elastic inductive expansion adhesive layer 15, with one end of the pressure-sensitive sealant 13 fixed to the elastic inductive expansion adhesive layer 15. Based on this, the fixing holes on each fixing plate 16 and the through holes on each fixing sleeve 14 are checked one by one to ensure precise alignment and one-to-one correspondence. Then, the multiple fixing rods 18 are aligned with the fixing sleeves respectively. The bottom of the fixing rod 18 is forcefully inserted through the through hole on the fixing sleeve 14 and into the mounting slot 17 to achieve a firm lock between the fixing sleeve 14 and the polyethylene composite pipe body 1. At the same time, the multiple through slots 21 on the fixing sleeve 14 are kept unobstructed so as not to affect subsequent operations. Then, with the help of the elastic sensing expansion adhesive layer 15 that has been fixedly installed on the opposite side of the fixing sleeve 14, the pressure sensing sealant 13 is installed between the memory elastic sealing ring 20 and the elastic sensing expansion adhesive layer 15. This makes one end of the pressure sensing sealant 13 tightly fixed to the elastic sensing expansion adhesive layer 15. Through the buffering effect of the elastic sensing expansion adhesive layer 15 and the sealing characteristics of the pressure sensing sealant 13, the tiny gaps at the connection are further filled, the overall sealing performance is enhanced, and the fixing sleeve 14 is ensured to stabilize the pipe interface while forming a synergistic protection with the sealing component, thereby improving the sealing reliability and structural stability of the connection of the polyethylene composite pipe body 1.

[0036] Furthermore, such as Figure 6 - Figure 8As shown, the sealing mechanism includes a fixed sleeve 3 fixedly installed inside one of the polyethylene composite pipe bodies 1, a connecting sleeve 4 fixedly installed on one side of the fixed sleeve 3, and a connecting sleeve 5 located at the end of the connecting sleeve 4 away from the fixed sleeve 3. A stepped portion 22 is fixedly installed between the connecting sleeve 4 and the connecting sleeve 5. An auxiliary sealing leak-proof component is provided inside the other polyethylene composite pipe body 1. The leak-proof component includes a stabilizing sleeve 7 fixedly installed inside the other polyethylene composite pipe body 1 and a sealing sleeve 2 fixedly installed on one side of the stabilizing sleeve 7. The connecting sleeve 5 is located inside the sealing sleeve 2. A stabilizing component for stabilizing the sealing sleeve 2 is provided at the end of the sealing sleeve 2 away from the stabilizing sleeve 7. Based on this, after completing the external stabilization and sealing component assembly, the fixed component is first fixedly installed inside one of the polyethylene composite pipe bodies 1. First, attach the connecting sleeve 4 to one side of the fixed sleeve 3. Then, install the connecting sleeve 5 at the end of the connecting sleeve 4 away from the fixed sleeve 3, ensuring that the stepped portion 22 between the connecting sleeve 4 and the connecting sleeve 5 fits tightly, completing one side assembly of the sealing mechanism. Next, fix the stabilizing sleeve 7 inside the other polyethylene composite pipe body 1, fix the sealing sleeve 2 to one side of the stabilizing sleeve 7, and then embed the assembled connecting sleeve 5 inside the sealing sleeve 2, so that the connecting sleeve 5 fits tightly against the inner wall of the sealing sleeve 2. The stepped portion 22 forms a limiting support. Through the nested cooperation of the sealing mechanism and the anti-leakage component, a double sealing structure is constructed inside the two polyethylene composite pipe bodies 1 on opposite sides, further blocking media leakage, and laying the foundation for the subsequent installation of the stabilizing component, ensuring the reliability of the internal sealing and structural stability of the pipe.

[0037] Please also refer to... Figure 6 - Figure 8The stabilizing component includes a retaining ring sleeve 10 fixedly installed at the end of the sealing sleeve 2 away from the stabilizing sleeve 7, and a retaining ring 8 fixedly installed at the end of the retaining ring sleeve 10 away from the sealing sleeve 2. A receiving groove 6 is provided on one side of another polyethylene composite pipe body 1, and a stepped plate 9 is fixedly installed on one side of the other polyethylene composite pipe body 1. The retaining ring 8 is located inside the receiving groove 6. Based on this, the retaining ring sleeve 10 is first fixedly installed at the end of the sealing sleeve 2 away from the stabilizing sleeve 7, and then the retaining ring 8 is fixed at the end of the retaining ring sleeve 10 away from the sealing sleeve 2, ensuring a tight connection without looseness. Then, alignment is performed. Another polyethylene composite pipe body 1 has a receiving groove 6 on one side, into which the assembled stabilizing retaining ring 8 is smoothly embedded. At the same time, the stepped plate 9 fixedly installed on one side of the polyethylene composite pipe body 1 is aligned with the retaining ring sleeve 10. Through the synergistic effect of the retaining ring sleeve 10 and the stabilizing retaining ring 8, the sealing sleeve 2 is stably limited, preventing it from shifting during pipe operation. This further enhances the nested sealing effect of the leak-proof component and the sealing mechanism, ensuring the structural stability and sealing reliability of the internal connection of the two polyethylene composite pipe bodies 1, and ensuring smooth and leak-free medium transportation within the porous diversion hole 23.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-sealing polyethylene composite pipe, characterized in that, include: Two polyethylene composite pipe bodies (1), each of the two polyethylene composite pipe bodies (1) has multiple porous diversion holes (23) inside. An adaptive sealing mechanism is located on the outer wall of two polyethylene composite pipe bodies (1) and is used to adapt and seal the connection between the two polyethylene composite pipe bodies (1). The adaptive sealing mechanism includes a pipe interface sealing compensation module (11) sleeved at the connection between the two polyethylene composite pipe bodies (1) and a connecting ring sleeve (12) fixedly installed on both sides of the pipe interface sealing compensation module (11). The two connecting ring sleeves (12) are respectively installed on the outer wall of the two polyethylene composite pipe bodies (1). The outer wall of the two polyethylene composite pipe bodies (1) is provided with auxiliary components for assisting the sealing of the pipe interface sealing compensation module (11). The auxiliary components include auxiliary adhesive layers (19) fixedly installed on one side of the two connecting ring sleeves (12) and memory elastic sealing rings (20) fixedly installed on one side of the two auxiliary adhesive layers (19). The two memory elastic sealing rings (20) and the two auxiliary adhesive layers (19) are all installed on the outer wall of the two polyethylene composite pipe bodies (1). The outer wall of the polyethylene composite pipe body (1) is provided with a stabilizing component for assisting the pipe interface sealing compensation module (11). The stabilizing component includes a fixing sleeve (14) installed on the outer wall of the two polyethylene composite pipe bodies (1) and a plurality of through slots (21) opened on the two fixing sleeves (14). The two polyethylene composite pipe bodies (1) are provided with a fixing component for fixing the two fixing sleeves (14) on their exterior. The fixing assembly includes multiple fixing plates (16) fixedly installed on the outer walls of the two polyethylene composite pipe bodies (1) and multiple fixing grooves opened on the inner wall of the fixing sleeve (14). The multiple fixing plates (16) are located inside the multiple fixing grooves. The fixing sleeve (14) is fixed by the multiple fixing plates (16). A sealing mechanism is provided inside the opposite sides of the two polyethylene composite pipe bodies (1). Each of the fixing plates (16) has a fixing hole, and the fixing sleeve (14) has a plurality of through holes, with each of the through holes corresponding to one of the fixing holes; Both of the fixed sleeves (14) are provided with multiple through slots (21), and both of the fixed sleeves (14) are provided with multiple fixed rods (18). The bottom of each of the multiple fixed rods (18) passes through the through hole and is located inside the mounting slot (17).

2. The high-sealing polyethylene composite pipe according to claim 1, characterized in that: Both of the two fixed sleeves (14) are fixedly installed with elastic inductive expansion adhesive layers (15) on opposite sides. Both of the polyethylene composite pipe bodies (1) are provided with pressure-sensitive sealant (13) on their outer walls. The pressure-sensitive sealant (13) is located between the memory elastic sealing ring (20) and the elastic inductive expansion adhesive layer (15). One end of the pressure-sensitive sealant (13) is fixed to the elastic inductive expansion adhesive layer (15).

3. The high-sealing polyethylene composite pipe according to claim 1, characterized in that: The sealing mechanism includes a fixed sleeve (3) fixedly installed inside one of the polyethylene composite pipe bodies (1), a connecting sleeve (4) fixedly installed on one side of the fixed sleeve (3), and a connecting sleeve (5) disposed at the end of the connecting sleeve (4) away from the fixed sleeve (3). A stepped portion (22) is fixedly installed between the connecting sleeve (4) and the connecting sleeve (5). An auxiliary sealing leak-proof component is provided inside the other polyethylene composite pipe body (1).

4. The high-sealing polyethylene composite pipe according to claim 3, characterized in that: The leak prevention component includes a stabilizing sleeve (7) fixedly installed inside another polyethylene composite pipe body (1) and a sealing sleeve (2) fixedly installed on one side of the stabilizing sleeve (7). The connecting sleeve (5) is located inside the sealing sleeve (2). The end of the sealing sleeve (2) away from the stabilizing sleeve (7) is provided with a stabilizing component to help stabilize the sealing sleeve (2).

5. A high-sealing polyethylene composite pipe according to claim 4, characterized in that: The stabilizing component includes a fixed retaining ring (10) fixedly installed on the end of the sealing sleeve (2) away from the stabilizing sleeve (7) and a stabilizing retaining ring (8) fixedly installed on the end of the fixed retaining ring (10) away from the sealing sleeve (2). A receiving groove (6) is provided on one side of another polyethylene composite pipe body (1), and a stepped plate (9) is fixedly installed on one side of another polyethylene composite pipe body (1). The stabilizing retaining ring (8) is located inside the receiving groove (6).

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