PP-HM double-wall corrugated pipe
By introducing sealing and elastic connection mechanisms at the joints of PP-HM double-wall corrugated pipes, the problems of unsealed connections and insufficient strength are solved, improving sealing and protection, preventing leakage and corrosion, and maintaining connection stability and protective effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN JINRUN PLASTIC TECH CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-05-01
AI Technical Summary
The existing PP-HM double-wall corrugated pipes have insufficient sealing at the joints, poor connection strength, and are prone to gaps and corrosion, leading to leakage of the circulating material and easy damage to the connection structure when exposed to the outside air.
It employs a sealing connection mechanism, an elastic connection mechanism, and a protective mechanism, including components such as a connecting inner tube, sealing ring, connecting plate, connecting rod, and protective cover. Through sealing treatment and elastic connection, it improves the sealing performance and strength of the connection and provides protective protection.
It enhances the sealing performance of the joint, improves the connection strength, prevents leakage and corrosion, maintains connection stability, and protects the connection structure from damage.
Smart Images
Figure CN224188190U_ABST
Abstract
Description
A type of PP-HM double-wall corrugated pipe Technical Field
[0001] This utility model relates to the field of corrugated pipe technology, specifically a PP-HM double-wall corrugated pipe. Background Technology
[0002] PP-HM double-wall corrugated pipe is a pipe product made of polypropylene polymer material. It has a double-wall structure, with a smooth inner wall and a corrugated outer wall. It also has high modulus, flexibility, and elasticity, and can withstand ground movement and resist uneven ground settlement. PP-HM double-wall corrugated pipe is mainly used in municipal engineering, such as drainage and sewage pipes, for treating urban sewage and rainwater discharge; and in building engineering, such as rainwater pipes, underground drainage pipes, and sewage pipes.
[0003] Existing PP-HM double-wall corrugated pipes connect two PP-HM double-wall corrugated pipes at their joint ends using flanges and bolts. This connection is not sufficiently sealed and has poor strength. When the two PP-HM double-wall corrugated pipes shake, tilt at different angles, or experience varying pressures, gaps can appear at the joint, causing leakage of the internal fluids. Furthermore, the connection structure is exposed to the outside air, making it susceptible to corrosion or impact damage, lacking proper protection.
[0004] Therefore, a PP-HM double-wall corrugated pipe is proposed to solve the problems mentioned above. Summary of the Invention
[0005] To address the shortcomings of existing technologies, this utility model provides a PP-HM double-wall corrugated pipe that can solve the problems of insufficient sealing at the joint and poor connection strength. When the two PP-HM double-wall corrugated pipes shake, are tilted at different angles, or are subjected to different levels of pressure, gaps may appear at the joint of the two PP-HM double-wall corrugated pipes.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a PP-HM double-wall corrugated pipe, comprising a first corrugated pipe body and a second corrugated pipe body, both ends of the first corrugated pipe body and the second corrugated pipe body are fixed with connecting flanges, a sealing connection mechanism is provided between the connecting ends of the first corrugated pipe body and the second corrugated pipe body, an elastic connection mechanism is provided between the two connecting flanges, and a protective mechanism is provided on the outside of the two connecting flanges.
[0007] The sealing connection mechanism includes a connecting inner tube, a first corrugated pipe body and a second corrugated pipe body with insertion grooves at both ends inside, two insertion grooves are inserted into the two ends of the connecting inner tube respectively, a first sealing ring is bonded to the outer side of both ends of the connecting inner tube, a connecting plate is fixed in the middle of the outer side of the connecting inner tube, and a second sealing ring is connected to the surface of the connecting inner tube and located on both sides of the connecting plate.
[0008] Preferably, the first sealing ring is tightly inserted into the inner surface of the insertion groove and is set horizontally, and the inner surface of the connecting inner tube is aligned with the inner surfaces of the first bellows body and the second bellows body.
[0009] Preferably, the second sealing ring is vertically arranged and abuts against the inner side of the connecting flange, and the connecting plate is vertically arranged between the two connecting flanges.
[0010] Preferably, an abutment ring is fixed on the surface of the connecting plate and at a position outside the second sealing ring. The abutment ring is horizontally positioned, and its two sides abut against the inner sides of the two connecting flanges, respectively.
[0011] Preferably, the elastic connection mechanism includes a connecting rod, a first connecting hole is uniformly opened on the surface of the connecting flange, and a second connecting hole is opened on the surface of the connecting plate at a position outside the abutment ring, and the connecting rod slides through the first connecting hole and the second connecting hole.
[0012] Preferably, the first connecting hole and the second connecting hole are horizontally aligned, the connecting plates are arranged in a star pattern, the connecting rod is a threaded rod structure and is horizontally set, and springs are sleeved at both ends of the connecting rod and at the outer ends of the connecting flange, and nuts are connected at both ends of the connecting rod and at the outer ends of the springs.
[0013] Preferably, the protective mechanism includes a protective cover, which is fixed to the outer end of the connecting plate. The gap of the protective cover is set on the outside of the connecting flange. A third sealing ring is bonded to the inner surface of the protective cover, and the third sealing ring tightly abuts against the side of the connecting flange.
[0014] Preferably, the protective cover has uniformly opened insertion holes on its surface edge, the outer side of the third sealing ring protrudes outward from the outer end of the connecting rod, the inner surface of the third sealing ring abuts against the outer side of the first bellows body with a protective ring, the protective ring abuts against the outer end of the connecting rod, and the side of the protective ring is uniformly connected with insertion strips, the insertion strips tightly pass through the insertion holes, and the insertion strips and the protective ring are uniformly made of elastic rubber material.
[0015] Compared with the prior art, this utility model provides a PP-HM double-wall corrugated pipe, which has the following beneficial effects:
[0016] 1. Insertion grooves are provided inside both ends of the first and second corrugated pipe bodies, and the two ends of the connecting inner pipe are inserted into the two insertion grooves and sealed by the first sealing ring. Furthermore, the second sealing ring abuts against the inner side of the connecting flange to enhance the sealing performance of the connection between the first and second corrugated pipe bodies.
[0017] 2. The inner tube is inserted into the connection between the first and second corrugated pipe bodies, while the connecting plate is set between the two connecting flanges and abuts against the inner side of the connecting flanges through the abutment ring. Therefore, the connecting rod positions and connects the connecting flange and the connecting plate, thereby improving the connection strength between the first and second corrugated pipe bodies and preventing gaps at the connection that could lead to leakage of the flowing material.
[0018] 3. The connecting rod secures the two connecting flanges together with a spring and nut, giving the two connecting flanges elasticity. When thermal expansion and contraction occur inside the first and second bellows bodies, the connection between the connecting flanges can be kept stable and prevent cracks or even breakage. This helps to maintain the sealing stability of the connection between the first and second bellows bodies.
[0019] 4. By fixing a protective cover to the outside of the connecting plate, and the protective cover covering the outside of the connecting rod and connecting flange through the third sealing ring, and the protective ring being detachably and elastically connected to the protective cover through the plug strip, and elastically and tightly abutting between the inside of the third sealing ring and the outside of the first bellows body, and protectively abutting against the outside of the connecting rod, the connecting flange and connecting rod and other parts can be protected, reducing corrosion and impact damage. Attached Figure Description
[0020] Figure 1 is a schematic diagram of the overall structure of the PP-HM double-wall corrugated pipe of this utility model;
[0021] Figure 2 is a schematic diagram of the connecting flange and connecting rod of the PP-HM double-wall corrugated pipe of this utility model.
[0022] Figure 3 is a schematic diagram of the protective cover and connecting inner tube of the PP-HM double-wall corrugated pipe of this utility model.
[0023] Figure 4 is a schematic diagram of the protective ring structure of the PP-HM double-wall corrugated pipe of this utility model;
[0024] Figure 5 is a schematic diagram of the connecting rod and spring structure of the PP-HM double-wall corrugated pipe of this utility model.
[0025] In the diagram: 1. First corrugated pipe body; 2. Second corrugated pipe body; 3. Protective cover; 4. Protective ring; 5. Insertion groove; 6. Connecting flange; 7. First connecting hole; 8. Connecting rod; 9. Insertion hole; 10. Third sealing ring; 11. Connecting inner pipe; 12. First sealing ring; 13. Second connecting hole; 14. Connecting plate; 15. Abutment ring; 16. Second sealing ring; 17. Insertion strip; 18. Spring; 19. Nut. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] Example:
[0028] Please refer to Figures 1-5. In this embodiment, a PP-HM double-wall corrugated pipe includes a first corrugated pipe body 1 and a second corrugated pipe body 2. Both ends of the first corrugated pipe body 1 and the second corrugated pipe body 2 are fixed with connecting flanges 6. A sealing connection mechanism is provided between the connecting ends of the first corrugated pipe body 1 and the second corrugated pipe body 2. An elastic connection mechanism is provided between the two connecting flanges 6. A protective mechanism is provided on the outside of the two connecting flanges 6.
[0029] The sealing connection mechanism includes a connecting inner tube 11, and two insertion slots 5 are opened at both ends of the inner ends of the first corrugated tube body 1 and the second corrugated tube body 2. The two ends of the connecting inner tube 11 are respectively inserted into the two insertion slots 5, and the two ends of the connecting inner tube 11 are bonded with a first sealing ring 12.
[0030] A connecting plate 14 is fixed to the middle of the outer side of the inner tube 11, and a second sealing ring 16 is connected to the surface of the inner tube 11 and located on both sides of the connecting plate 14.
[0031] The first sealing ring 12 is tightly inserted into the inner surface of the insertion groove 5 and is set horizontally, with the inner surface of the connecting inner tube 11 aligned with the inner surfaces of the first corrugated tube body 1 and the second corrugated tube body 2.
[0032] The second sealing ring 16 is vertically arranged and abuts against the inner side of the connecting flange 6. The connecting plate 14 is vertically arranged between the two connecting flanges 6.
[0033] In this design, insertion grooves 5 are provided inside both ends of the first corrugated pipe body 1 and the second corrugated pipe body 2, and the two ends of the connecting inner pipe 11 are inserted into the two insertion grooves 5 and sealed by the first sealing ring 12.
[0034] Furthermore, the second sealing ring 16 abuts against the inside of the connecting flange 6, thereby enhancing the sealing performance at the connection between the first bellows body 1 and the second bellows body 2.
[0035] In detail, an abutment ring 15 is fixed on the surface of the connecting plate 14 and at a position outside the second sealing ring 16. The abutment ring 15 is horizontally set, and its two sides abut against the inner sides of the two connecting flanges 6 respectively.
[0036] The flexible connection mechanism includes a connecting rod 8, a first connecting hole 7 evenly opened on the surface of the connecting flange 6, and a second connecting hole 13 opened on the surface of the connecting plate 14 at a position outside the abutment ring 15. The connecting rod 8 slides through the first connecting hole 7 and the second connecting hole 13.
[0037] The inner connecting tube 11 is inserted into the connection between the first corrugated pipe body 1 and the second corrugated pipe body 2, while the connecting plate 14 is disposed between the two connecting flanges 6 and abuts against the inner side of the connecting flange 6 through the abutment ring 15.
[0038] Therefore, by using the connecting rod 8 to position and connect the connecting flange 6 and the connecting plate 14, the connection strength between the first corrugated pipe body 1 and the second corrugated pipe body 2 can be improved, thus preventing gaps from appearing at the connection and causing leakage of the circulating material.
[0039] To elaborate further, the first connecting hole 7 and the second connecting hole 13 are horizontally aligned, the connecting plates 14 are arranged in a star pattern, the connecting rod 8 is a threaded rod structure and is horizontally set, and springs 18 are sleeved at both ends of the connecting rod 8 and at the outer ends of the connecting flange 6, and nuts 19 are connected at both ends of the connecting rod 8 and at the outer ends of the springs 18.
[0040] The connecting rod 8 is fastened between the two connecting flanges 6 by spring 18 and nut 19, so that the two connecting flanges 6 have elasticity.
[0041] When thermal expansion and contraction occur inside the first bellows body 1 and the second bellows body 2, the connection between the connecting flanges 6 can be kept stable, and cracks or even breakage may occur at the connection, which helps to maintain the sealing stability of the connection between the first bellows body 1 and the second bellows body 2.
[0042] Finally, the protective mechanism includes a protective cover 3, which is fixed to the outer end of the connecting plate 14. The gap of the protective cover 3 is set on the outside of the connecting flange 6. A third sealing ring 10 is bonded to the inner surface of the protective cover 3, and the third sealing ring 10 tightly abuts against the side of the connecting flange 6.
[0043] The protective cover 3 has evenly spaced insertion holes 9 on its surface edge. The outer side of the third sealing ring 10 protrudes outward from the outer end of the connecting rod 8. A protective ring 4 abuts between the inner surface of the third sealing ring 10 and the outer side of the first bellows body 1. The protective ring 4 abuts against the outer end of the connecting rod 8.
[0044] The protective ring 4 is evenly connected with plug strips 17 on its side. The plug strips 17 tightly pass through the plug hole 9. The plug strips 17 and the protective ring 4 are both made of elastic rubber.
[0045] Specifically, a protective cover 3 is fixed to the outside of the connecting plate 14, and the protective cover 3 is covered by a third sealing ring 10 on the outside of the connecting rod 8 and the connecting flange 6. The protective ring 4 is detachably and elastically connected to the protective cover 3 by a plug strip 17.
[0046] The protective ring 4 is elastically and tightly abutted between the inner side of the third sealing ring 10 and the outer side of the first bellows body 1, and is also protectively abutted against the outer side of the connecting rod 8, thereby protecting the connecting flange 6 and the connecting rod 8 and reducing corrosion and impact damage.
[0047] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.
[0048] Although embodiments of the present 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 of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A PP-HM double-wall corrugated pipe, characterized in that: The device includes a first corrugated pipe body and a second corrugated pipe body. Both ends of the first and second corrugated pipe bodies are fixed with connecting flanges. A sealing connection mechanism is provided between the connecting ends of the first and second corrugated pipe bodies. An elastic connection mechanism is provided between the two connecting flanges. A protective mechanism is provided on the outer sides of the two connecting flanges. The sealing connection mechanism includes a connecting inner tube. Insertion grooves are opened at both ends of the first and second corrugated pipe bodies. The two ends of the connecting inner tube are respectively inserted into the two insertion grooves. A first sealing ring is bonded to the outer sides of both ends of the connecting inner tube. A connecting plate is fixed to the middle of the outer side of the connecting inner tube. A second sealing ring is connected to the surface of the connecting inner tube at positions on both sides of the connecting plate.
2. The PP-HM double-wall corrugated pipe according to claim 1, characterized in that: The first sealing ring is tightly inserted into the inner surface of the insertion groove and is set horizontally. The inner surface of the connecting inner tube is aligned with the inner surfaces of the first corrugated pipe body and the second corrugated pipe body.
3. The PP-HM double-wall corrugated pipe according to claim 1, characterized in that: The second sealing ring is vertically arranged and abuts against the inner side of the connecting flange. The connecting plate is vertically arranged between the two connecting flanges.
4. The PP-HM double-wall corrugated pipe according to claim 3, characterized in that: An abutment ring is fixed on the surface of the connecting plate and at a position outside the second sealing ring. The abutment ring is horizontally arranged, and its two sides abut against the inner sides of the two connecting flanges respectively.
5. The PP-HM double-wall corrugated pipe according to claim 4, characterized in that: The elastic connection mechanism includes a connecting rod, a first connecting hole is uniformly opened on the surface of the connecting flange, and a second connecting hole is opened on the surface of the connecting plate at a position outside the abutment ring. The connecting rod slides through the first connecting hole and the second connecting hole.
6. The PP-HM double-wall corrugated pipe according to claim 5, characterized in that: The first connecting hole and the second connecting hole are horizontally aligned. The connecting plates are arranged in a star-shaped pattern. The connecting rod is a threaded rod structure and is horizontally arranged. Springs are sleeved at both ends of the connecting rod and at the outer ends of the connecting flange. Nuts are connected to both ends of the connecting rod and at the outer ends of the springs.
7. The PP-HM double-wall corrugated pipe according to claim 5, characterized in that: The protective mechanism includes a protective cover, which is fixed to the outer end of the connecting plate. The gap of the protective cover is set on the outside of the connecting flange. A third sealing ring is bonded to the inner surface of the protective cover, and the third sealing ring tightly abuts against the side of the connecting flange.
8. The PP-HM double-wall corrugated pipe according to claim 7, characterized in that: The protective cover has uniformly distributed insertion holes on its surface edge. The outer side of the third sealing ring protrudes outward from the outer end of the connecting rod. A protective ring abuts between the inner surface of the third sealing ring and the outer side of the first corrugated pipe body. The protective ring abuts against the outer end of the connecting rod. Insertion strips are uniformly connected to the side of the protective ring. The insertion strips tightly pass through the insertion holes. The insertion strips and the protective ring are uniformly made of elastic rubber material.