PVC-M composite polyvinyl chloride double-wall corrugated pipe

Abstract

The utility model relates to a PVC-M composite polyvinyl chloride double-wall corrugated pipe which comprises a double-wall corrugated pipe body, pipe connectors are connected to the two ends of the double-wall corrugated pipe body in an inserted mode, sealing mechanisms are fixedly connected to the interiors of the pipe connectors, and the sealing mechanisms are located between the ends of the double-wall corrugated pipe body and the inner walls of the pipe connectors. Limiting hoops are arranged on the outer walls of the two ends of the double-wall corrugated pipe body, arc-shaped fixing plates are symmetrically and fixedly connected to the outer walls of the limiting hoops, and a plurality of connecting screws are evenly arranged between the arc-shaped fixing plates and the pipe connectors. When the double-wall corrugated pipe is used, the pipe connector is installed at the end of the double-wall corrugated pipe body in an inserted mode, the sealing effect between the double-wall corrugated pipe body and the pipe connector is enhanced through the sealing mechanism, and then the limiting hoop is matched with the arc-shaped fixing plate and the connecting screw to limit the installation position of the pipe connector; therefore, the stability of the limiting pipe connector during installation and use can be enhanced, and adjacent double-wall corrugated pipe bodies can be conveniently connected through bolts through the limiting pipe connector.

Description

Technical Field

[0001] The present application relates to the technical field of double-wall corrugated pipes, and in particular to a PVC-M composite polyvinyl chloride double-wall corrugated pipe. Background Art

[0002] PVC is a common plastic. By introducing some modifiers into its molecular structure, it can have better performance, such as higher heat resistance and cold resistance. PVC-M, or modified polyvinyl chloride, means that some improvements and optimizations have been made on the original PVC. Such improvements may include adding special additives, improving molecular structure, etc., to improve the specific properties of the pipe, such as heat resistance, cold resistance, chemical corrosion resistance, etc. PVC-M composite polyvinyl chloride double-wall corrugated pipe has a double-wall structure. This design not only enhances the strength of the pipe, but also improves its flexibility, making it more suitable for environments that require bending.

[0003] In the related art, PVC-M composite polyvinyl chloride double-wall corrugated pipes are generally divided into inner and outer walls, and the surface is wavy. During installation, the pipe is usually provided with a socket joint at one end, which can facilitate the use of an elastic sealing ring socket connection between adjacent PVC-M composite polyvinyl chloride double-wall corrugated pipes. However, once the socket joint needs to be cut due to the length of the PVC-M composite polyvinyl chloride double-wall corrugated pipe or other reasons, it may cause inconvenience in connecting the PVC-M composite polyvinyl chloride double-wall corrugated pipes, which is not conducive to practical use. Therefore, those skilled in the art provide a PVC-M composite polyvinyl chloride double-wall corrugated pipe to solve the problems raised in the above background technology. Utility Model Content

[0004] In order to solve the problem raised in the above background technology that the socket joint needs to be cut due to the length of PVC-M composite polyvinyl chloride double-wall corrugated pipe or other reasons, which may cause inconvenience in connecting PVC-M composite polyvinyl chloride double-wall corrugated pipes, the present application provides a PVC-M composite polyvinyl chloride double-wall corrugated pipe.

[0005] The present application provides a PVC-M composite polyvinyl chloride double-wall corrugated pipe adopting the following technical solution:

[0006] A PVC-M composite polyvinyl chloride double-wall corrugated pipe comprises a double-wall corrugated pipe body, both ends of the double-wall corrugated pipe body are plugged with pipe connectors, the inside of the pipe connector is fixedly connected with a sealing mechanism, the sealing mechanism is located between the end of the double-wall corrugated pipe body and the inner wall of the pipe connector, the outer walls of both ends of the double-wall corrugated pipe body are provided with limiting hoops, the outer walls of the limiting hoops are symmetrically fixedly connected with arc-shaped fixing plates, and a number of connecting screws are evenly arranged between the arc-shaped fixing plates and the pipe connector.

[0007] By adopting the above technical scheme, the pipe connector is plugged and installed at the end of the double-wall corrugated pipe body, and the sealing effect between the pipe connector and the double-wall corrugated pipe body is enhanced by the sealing mechanism. Then, by cooperating with the limit hoop installed on the outer wall of the double-wall corrugated pipe body, the arc-shaped fixing plate and the connecting screws, the installation position of the pipe connector can be limited, thereby enhancing the stability of the pipe connector during installation and use. By limiting the pipe connector, adjacent double-wall corrugated pipe bodies can be easily connected by bolts.

[0008] Preferably, the double-wall corrugated pipe body comprises an inner tube, the outer wall of the inner tube is evenly and fixedly connected with a plurality of arc-shaped portions and an outer tube, the arc-shaped portions are spaced apart from the outer tube, and the arc-shaped portions are fixedly connected to adjacent portions of the outer tube.

[0009] By adopting the above technical solution, the inner tube is the inner layer of the double-wall corrugated tube body, and the evenly arranged arc portion and the outer tube are the outer layer of the double-wall corrugated tube body. The arc portion can increase the flexibility of the tube body, and the outer tube can protect the inner tube while providing additional strength and wear resistance.

[0010] Preferably, the pipe connector includes a connecting flange, one side of the connecting flange is fixedly connected to a connecting ring plate, a side of the connecting ring plate away from the connecting flange is provided with a slot, one end of the double-wall corrugated pipe body is located inside the slot, the inner wall of the connecting ring plate is cut with a first storage groove connected to the slot, and the sealing mechanism is located inside the first storage groove.

[0011] By adopting the above technical solution, the slot can facilitate the connection between the connecting ring plate and the double-wall corrugated pipe body through plug-in, and the first storage groove can limit the installation position of the sealing mechanism.

[0012] Preferably, the limiting hoop includes a top arc plate and a bottom arc plate, the symmetrically arranged arc fixing plates are respectively fixedly connected to the outer walls of the top arc plate and the bottom arc plate, the outer walls at both ends of the top arc plate and the bottom arc plate are fixedly connected with connecting plates, and the connecting plates at both ends of the top arc plate and the bottom arc plate are connected by bolts.

[0013] By adopting the above technical solution, after the top arc plate and the bottom arc plate are closed, they can be limited by the cooperation of bolts and connecting plates, and the top arc plate and the bottom arc plate can be installed on the outer tube part of the double-wall corrugated pipe body, and then the installation position of the top arc plate and the bottom arc plate can be limited by the arc part.

[0014] Preferably, an anti-skid pad is fixedly connected to the inner wall of the limiting hoop, and the inner wall of the anti-skid pad abuts against the outer wall of the double-wall corrugated pipe body.

[0015] By adopting the above technical solution, after the limiting hoop is installed, the friction between the limiting hoop and the double-wall corrugated pipe body can be increased through the anti-slip pad, thereby enhancing the tightness of the installation of the limiting hoop.

[0016] Preferably, the inner wall of the arc-shaped portion is evenly and fixedly connected with reinforcing ribs, and one end of the reinforcing ribs away from the arc-shaped portion is fixedly connected to the outer wall of the inner tube.

[0017] By adopting the above technical solution, the reinforcing ribs can enhance the strength of the arc-shaped portion and prevent the arc-shaped portion from being concave and deformed.

[0018] Preferably, the sealing mechanism comprises a U-shaped ring located inside the first storage groove, the inner wall of the U-shaped ring is evenly and fixedly connected with an arc-shaped protruding ring, and the arc-shaped protruding ring abuts against the double-wall corrugated tube body.

[0019] By adopting the above technical solution, the cross-section of the U-shaped ring is U-shaped. When the double-wall corrugated pipe body is installed, the end of the double-wall corrugated pipe body can be inserted into the U-shaped ring. After the double-wall corrugated pipe body is installed, the arc-shaped protruding ring can enhance the sealing effect of the double-wall corrugated pipe body.

[0020] Preferably, a second storage groove is cut on a side of the connecting flange away from the connecting ring plate, and a sealing ring is arranged inside the second storage groove.

[0021] By adopting the above technical solution, when adjacent connecting flanges are connected by bolts, the sealing effect can be enhanced by the sealing ring.

[0022] In summary, this application includes the following beneficial technical effects:

[0023] 1. The PVC-M composite polyvinyl chloride double-wall corrugated pipe has a pipe connector that can be installed at the end of the double-wall corrugated pipe body as required. The sealing mechanism arranged inside the pipe connector can enhance the sealing effect between the double-wall corrugated pipe body and the double-wall corrugated pipe body. The limit hoop installed on the outer wall of the double-wall corrugated pipe body cooperates with the arc-shaped fixing plate and the connecting screws to limit the installation position of the pipe connector at the end of the double-wall corrugated pipe body, thereby enhancing the stability of the pipe connector during installation and use. By limiting the pipe connector, adjacent double-wall corrugated pipe bodies can be connected by bolts, thereby avoiding as much as possible the situation where the socket joint of the double-wall corrugated pipe body is cut, which leads to inconvenience in connecting the double-wall corrugated pipe bodies;

[0024] 2. The PVC-M composite polyvinyl chloride double-wall corrugated pipe has an inner tube as the inner layer of the double-wall corrugated pipe body, and the evenly arranged arc-shaped parts and outer tube as the outer layer of the double-wall corrugated pipe body. The arc-shaped parts can increase the flexibility of the pipe body, and the reinforcing ribs can enhance the strength of the arc-shaped parts to prevent the arc-shaped parts from being sunken and deformed. The outer tube can protect the inner tube and provide additional strength and wear resistance. The slot can facilitate the connection between the connecting ring plate and the double-wall corrugated pipe body by plugging. The first storage groove can limit the installation position of the sealing mechanism. When the adjacent connecting flanges are connected by bolts, the sealing ring can enhance the sealing effect.

[0025] 3. The PVC-M composite polyvinyl chloride double-wall corrugated pipe can be limited by bolts and connecting plates after the top arc plate and the bottom arc plate are closed, and the top arc plate and the bottom arc plate can be installed on the outer tube of the double-wall corrugated pipe body, and the installation position of the top arc plate and the bottom arc plate can be limited by the arc portion. After the limiting hoop is installed, the friction between the double-wall corrugated pipe body and the anti-slip pad can be used to increase the tightness of the installation of the limiting hoop. After the end of the double-wall corrugated pipe body is installed and inserted into the U-shaped ring, the sealing effect of the double-wall corrugated pipe body can be enhanced by the arc-shaped protruding ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0027] Figure 2 is a schematic cross-sectional structural diagram in an embodiment of the present application;

[0028] Figure 3 This is an embodiment of the present application Figure 2 A schematic diagram of the structure enlargement at point A;

[0029] Figure 4 It is a schematic diagram of the limiting hoop structure in the embodiment of the present application.

[0030] Explanation of the reference numerals: 1. Double-wall corrugated pipe body; 101. Inner pipe; 102. Arc-shaped portion; 103. Outer pipe; 2. Pipe connector; 201. Connecting flange; 202. Connecting ring plate; 203. Slot; 204. First storage groove; 3. Sealing mechanism; 301. U-shaped ring; 302. Arc-shaped protruding ring; 4. Limiting hoop; 401. Top arc-shaped plate; 402. Bottom arc-shaped plate; 403. Connecting plate; 5. Arc-shaped fixing plate; 6. Connecting screws; 7. Reinforcing ribs; 8. Second storage groove; 9. Sealing ring; 10. Anti-slip pad. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The present application embodiment discloses a PVC-M composite polyvinyl chloride double-wall corrugated pipe. Figure 1 , Figure 2 and Figure 3 The PVC-M composite polyvinyl chloride double-wall corrugated pipe comprises a double-wall corrugated pipe body 1, both ends of the double-wall corrugated pipe body 1 are plugged with pipe connectors 2, the inside of the pipe connector 2 is fixedly connected with a sealing mechanism 3, the sealing mechanism 3 is located between the end of the double-wall corrugated pipe body 1 and the inner wall of the pipe connector 2, and the outer walls of both ends of the double-wall corrugated pipe body 1 are provided with limiting hoops 4, the outer walls of the limiting hoops 4 are symmetrically fixedly connected with arc-shaped fixing plates 5, and a number of connecting screws 6 are evenly arranged between the arc-shaped fixing plates 5 and the pipe connector 2.

[0033] In this embodiment, the pipe connector 2 provided in the PVC-M composite polyvinyl chloride double-wall corrugated pipe can be plugged and installed at the end of the double-wall corrugated pipe body 1 as needed, and after the pipe connector 2 is installed, the sealing mechanism 3 located inside the pipe connector 2 can wrap the plug-in part of the double-wall corrugated pipe body 1, thereby enhancing the sealing effect of the connection between the double-wall corrugated pipe body 1 and the pipe connector 2, and the limiting hoop 4 is installed on the outer wall of the double-wall corrugated pipe body 1, and the outer wall of the limiting hoop 4 is symmetrically fixedly connected with an arc-shaped fixing plate 5, and the arc-shaped fixing plate 5 is fixedly connected to the outer wall of the limiting hoop 4. Mounting holes are evenly opened on the top, and the opened mounting holes cooperate with the connecting screws 6 to be connected to the pipe connector 2, thereby limiting the installation position of the pipe connector 2 at the end of the double-wall corrugated pipe body 1, and enhancing the stability of the pipe connector 2 during installation and use. The set limiting pipe connector 2 can facilitate the connection between adjacent double-wall corrugated pipe bodies 1 by bolts, thereby avoiding as much as possible the inconvenience of connection between the double-wall corrugated pipe bodies 1 caused by the cutting of the socket joint of the double-wall corrugated pipe body 1, making the present application more conducive to practical use.

[0034] In a further preferred embodiment of the present invention, Figure 1 , Figure 2 and Figure 3 As shown, the double-wall corrugated pipe body 1 includes an inner tube 101, and the outer wall of the inner tube 101 is evenly and fixedly connected with a plurality of arc-shaped portions 102 and an outer tube 103, the arc-shaped portions 102 and the outer tube 103 are arranged at intervals, and the arc-shaped portions 102 and the outer tube 103 are fixedly connected at adjacent positions.

[0035] In this embodiment, the inner tube 101 is the inner layer of the double-wall corrugated pipe body 1, which may be used to transmit liquids, gases or other media. The evenly arranged arc portion 102 and the outer tube 103 are the outer layers of the double-wall corrugated pipe body 1. The arc portion 102 can be used to increase the flexibility of the pipe body, making it easier to adapt to curved or bent pipeline layouts, and the uniform distribution of the arc portion 102 can help improve the bending performance of the pipe body and reduce stress concentration during installation. The outer tube 103 can protect the inner tube 101 and provide additional strength and wear resistance.

[0036] In a further preferred embodiment of the present invention, Figure 2 As shown, the inner wall of the arc-shaped portion 102 is evenly and fixedly connected with reinforcing ribs 7 , and one end of the reinforcing rib 7 away from the arc-shaped portion 102 is fixedly connected to the outer wall of the inner tube 101 .

[0037] In this embodiment, the reinforcing ribs 7 are supported between the inner wall of the arc-shaped portion 102 and the outer wall of the inner tube 101 , so as to enhance the strength of the arc-shaped portion 102 and avoid the arc-shaped portion 102 from being sunken and deformed as much as possible.

[0038] In a further preferred embodiment of the present invention, Figure 1 , Figure 2 and Figure 3 As shown, the pipe connector 2 includes a connecting flange 201, a connecting ring plate 202 is fixedly connected to one side of the connecting flange 201, a slot 203 is provided on the side of the connecting ring plate 202 away from the connecting flange 201, one end of the double-wall corrugated pipe body 1 is located inside the slot 203, the inner wall of the connecting ring plate 202 is cut with a first storage groove 204 connected to the slot 203, and the sealing mechanism 3 is located inside the first storage groove 204.

[0039] In this embodiment, the slot 203 provided can facilitate the connection between the connecting ring plate 202 and the double-walled corrugated pipe body 1 by plugging. After the connecting ring plate 202 and the double-walled corrugated pipe body 1 are plugged, the connecting flange 201 can be installed on the end of the double-walled corrugated pipe body 1, and through holes for connecting the connecting screws 6 are evenly provided on the connecting flange 201, so that the installation position of the connecting flange 201 can be limited by the cooperation of the connecting screws 6 with the arc-shaped fixing plate 5 and the limiting hoop 4, and the stability of the installation of the connecting flange 201 can be enhanced. At the same time, the connecting flange 201 can also facilitate the connection between adjacent double-walled corrugated pipe bodies 1 by bolts. The first storage groove 204 provided can limit the installation position of the sealing mechanism 3, so that the connection part between the connecting ring plate 202 and the double-walled corrugated pipe body 1 can be sealed by the sealing mechanism 3.

[0040] In a further preferred embodiment of the present invention, Figure 2 and Figure 3 As shown, the sealing mechanism 3 includes a U-shaped ring 301 located inside the first storage groove 204 , and an arc-shaped protruding ring 302 is evenly and fixedly connected to the inner wall of the U-shaped ring 301 , and the arc-shaped protruding ring 302 abuts against the double-wall corrugated pipe body 1 .

[0041] In the present embodiment, the U-shaped ring 301 is in the shape of a circular ring as a whole, and the cross-section of the U-shaped ring 301 is U-shaped. When the double-walled corrugated pipe body 1 is installed, the end face of the double-walled corrugated pipe body 1 can be inserted into the interior of the U-shaped ring 301, and an arc-shaped protruding ring 302 is evenly and fixedly connected to the inner wall of the U-shaped ring 301. Therefore, after the double-walled corrugated pipe body 1 is installed, the arc-shaped protruding ring 302 can abut against the double-walled corrugated pipe body 1, thereby enhancing the sealing effect of the double-walled corrugated pipe body 1, making the present application more conducive to practical use.

[0042] In a further preferred embodiment of the present invention, Figure 1 and Figure 2 As shown, a second storage groove 8 is cut on one side of the connecting flange 201 away from the connecting ring plate 202 , and a sealing ring 9 is arranged inside the second storage groove 8 .

[0043] In this embodiment, the second storage groove 8 can limit the installation position of the sealing ring 9. The sealing ring 9 is made of rubber material and has a certain elasticity. Therefore, when adjacent connecting flanges 201 are connected by bolts, the sealing ring 9 can enhance the sealing effect.

[0044] In a further preferred embodiment of the present invention, Figure 1 , Figure 2 and Figure 4 As shown, the limiting hoop 4 includes a top arc plate 401 and a bottom arc plate 402, and the symmetrically arranged arc fixing plates 5 are respectively fixedly connected to the outer walls of the top arc plate 401 and the bottom arc plate 402, and the outer walls at both ends of the top arc plate 401 and the bottom arc plate 402 are fixedly connected with connecting plates 403, and the connecting plates 403 at both ends of the top arc plate 401 and the bottom arc plate 402 are connected by bolts.

[0045] In this embodiment, a circular ring can be formed after the top arc plate 401 and the bottom arc plate 402 are closed. After the top arc plate 401 and the bottom arc plate 402 are closed into a circular ring, the top arc plate 401 and the bottom arc plate 402 can be limited by cooperating with the connecting plate 403 through bolts, and the circular ring portion can be installed on the outer tube 103 of the double-wall corrugated pipe body 1, and then the installation position of the top arc plate 401 and the bottom arc plate 402 can be limited by the arc portion 102, so that the installation position of the pipe connector 2 can be limited by cooperating with the arc fixing plate 5 installed on the top arc plate 401 and the bottom arc plate 402 and the connecting screws 6.

[0046] In a further preferred embodiment of the present invention, Figure 2 and Figure 4 As shown, the inner wall of the limiting hoop 4 is fixedly connected with an anti-skid pad 10 , and the inner wall of the anti-skid pad 10 abuts against the outer wall of the double-wall corrugated pipe body 1 .

[0047] In this embodiment, the anti-skid pad 10 is made of rubber material, and the inner wall of the anti-skid pad 10 has anti-skid patterns, so that after the limiting hoop 4 is installed, the anti-skid pad 10 can increase the friction between the double-wall corrugated pipe body 1 and enhance the tightness of the installation of the limiting hoop 4.

[0048] The implementation principle of the PVC-M composite polyvinyl chloride double-wall corrugated pipe of the embodiment of the present application is:

[0049] When in use, after the socket joint of the double-wall corrugated pipe body 1 is cut due to length or other reasons, the pipe connector 2 can be plugged and installed on the end of the double-wall corrugated pipe body 1, and the sealing mechanism 3 arranged inside the pipe connector 2 can enhance the sealing effect between the double-wall corrugated pipe body 1, and then the limiting hoop 4 installed on the outer wall of the double-wall corrugated pipe body 1 cooperates with the arc fixing plate 5 and the connecting screws 6 to limit the installation position of the pipe connector 2 at the end of the double-wall corrugated pipe body 1, thereby enhancing the stability of the pipe connector 2 during installation and use, and the limiting pipe connector 2 set can facilitate the connection between adjacent double-wall corrugated pipe bodies 1 by bolts, thereby avoiding as much as possible the inconvenience of connection between the double-wall corrugated pipe bodies 1 caused by the cutting of the socket joint of the double-wall corrugated pipe body 1, making the present application more conducive to practical use.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A PVC-M composite polyvinyl chloride double-wall corrugated pipe, comprising a double-wall corrugated pipe body (1), characterized in that: Both ends of the double-wall corrugated pipe body (1) are plugged with pipe connectors (2), and the interior of the pipe connector (2) is fixedly connected with a sealing mechanism (3), and the sealing mechanism (3) is located between the end of the double-wall corrugated pipe body (1) and the inner wall of the pipe connector (2). The outer walls of both ends of the double-wall corrugated pipe body (1) are provided with limiting hoops (4), and the outer walls of the limiting hoops (4) are symmetrically fixedly connected with arc-shaped fixing plates (5), and a plurality of connecting screws (6) are evenly arranged between the arc-shaped fixing plates (5) and the pipe connector (2).

2. The PVC-M composite polyvinyl chloride double-wall corrugated pipe according to claim 1, characterized in that: The double-wall corrugated pipe body (1) comprises an inner pipe (101), the outer wall of the inner pipe (101) being evenly and fixedly connected with a plurality of arc-shaped portions (102) and an outer pipe (103), the arc-shaped portions (102) and the outer pipe (103) being arranged at intervals, and the arc-shaped portions (102) and adjacent portions of the outer pipe (103) being fixedly connected.

3. The PVC-M composite polyvinyl chloride double-wall corrugated pipe according to claim 1, characterized in that: The pipe connector (2) comprises a connecting flange (201), one side of the connecting flange (201) is fixedly connected to a connecting ring plate (202), a side of the connecting ring plate (202) away from the connecting flange (201) is provided with a slot (203), one end of the double-wall corrugated pipe body (1) is located inside the slot (203), the inner wall of the connecting ring plate (202) is cut with a first storage groove (204) connected to the slot (203), and the sealing mechanism (3) is located inside the first storage groove (204).

4. The PVC-M composite polyvinyl chloride double-wall corrugated pipe according to claim 1, characterized in that: The limiting hoop (4) comprises a top arc-shaped plate (401) and a bottom arc-shaped plate (402); the arc-shaped fixing plates (5) are symmetrically arranged and fixedly connected to the outer walls of the top arc-shaped plate (401) and the bottom arc-shaped plate (402), respectively; the outer walls at both ends of the top arc-shaped plate (401) and the bottom arc-shaped plate (402) are fixedly connected with connecting plates (403); the connecting plates (403) at both ends of the top arc-shaped plate (401) and the bottom arc-shaped plate (402) are connected by bolts.

5. The PVC-M composite polyvinyl chloride double-wall corrugated pipe according to claim 1, characterized in that: The inner wall of the limiting hoop (4) is fixedly connected with an anti-skid pad (10), and the inner wall of the anti-skid pad (10) abuts against the outer wall of the double-wall corrugated pipe body (1).

6. The PVC-M composite polyvinyl chloride double-wall corrugated pipe according to claim 2, characterized in that: The inner wall of the arc-shaped portion (102) is evenly and fixedly connected with reinforcing ribs (7), and one end of the reinforcing rib (7) away from the arc-shaped portion (102) is fixedly connected to the outer wall of the inner tube (101).

7. The PVC-M composite polyvinyl chloride double-wall corrugated pipe according to claim 3, characterized in that: The sealing mechanism (3) comprises a U-shaped ring (301) located inside the first storage groove (204), the inner wall of the U-shaped ring (301) being evenly and fixedly connected with an arc-shaped protruding ring (302), and the arc-shaped protruding ring (302) abuts against the double-wall corrugated pipe body (1).

8. The PVC-M composite polyvinyl chloride double-wall corrugated pipe according to claim 3, characterized in that: A second storage groove (8) is cut in an annular manner on a side of the connecting flange (201) away from the connecting ring plate (202), and a sealing ring (9) is arranged inside the second storage groove (8).

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