PVC (polyvinyl chloride) pipe with rubber ring prefabricated structure

Abstract

The invention relates to the technical field of PVC (polyvinyl chloride) pipes, in particular to a PVC pipe with a rubber ring prefabricated structure, which comprises a pipe body, a rubber ring is arranged at the end of the pipe body, the rubber ring is annular and umbrella-shaped, the annular rubber ring is coaxially arranged on the pipe body, a plurality of elastic plates for supporting the rubber ring are arranged on the pipe body, and the elastic plates are arranged on the pipe body. The multiple elastic plates are evenly distributed on the pipe body in the circumferential direction, and the pipe body is further provided with an expansion assembly used for expanding the rubber ring. The umbrella-shaped rubber ring is arranged and is matched with the expansion assembly, so that the rubber ring can be expanded under the pushing of the expansion assembly, the rubber ring can be expanded to adapt to connection of pipelines with large pipe diameters, an additional pipeline connector does not need to be arranged, and the use is convenient. And the expansion assembly can achieve stepless adjustment of the expansion degree of the rubber ring through cooperation of a first thread and a second thread, and connection and installation of the PVC pipeline are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of PVC pipes, in particular to a PVC pipe with a prefabricated rubber ring structure. Background Art

[0002] PVC is the abbreviation of Polyvinylchlorid, which is mainly composed of polyvinyl chloride, and other ingredients are added to enhance its heat resistance, toughness and ductility. At present, pipes made of PVC are widely used in electrical, heating, water supply and other fields due to their advantages such as easy processing and low cost.

[0003] In PVC pipe systems, pipes are usually connected by plugging. When the diameters of two pipes differ greatly, one pipe cannot fit into the other and a large gap will be created between the pipes. At this time, the gap between the pipes needs to be filled to avoid leakage. However, filling the gap at the pipe joint is a complex operation and may cause debris to enter the pipe during filling, causing contamination.

[0004] In addition to filling the gaps in the pipe connections by yourself, you can also use pipe connectors to convert the diameter of the connectors. However, in real life, pipe connectors usually have fixed conversion sizes, which are difficult to adapt to various situations in production and life. The Chinese invention patent with application number CN202211038175.2 and name "A rubber connector for self-adjusting pipe installation" proposes a connector to solve the problem of difficulty in connecting pipes of different diameters, including a connecting mechanism; the connecting mechanism includes a support ring, an elastic ring, a drive ring, a rubber ring and a fastening structure; the support ring is arranged at the right end of pipe one; the drive ring is arranged on the right side of the support ring; multiple drive plates are arranged clockwise in the same circle; the elastic ring allows the drive ring to move left and right; the rubber ring is a plurality of inner and outer sleeves; the fastening structure is configured to form an inner and outer multi-stage sleeve connection structure with multiple rubber rings, and is connected to the drive ring; and when pipe one and pipe two are connected and tightened to the corresponding rubber ring to reach a preset first fastening position; the drive ring is rotated clockwise to drive the multiple rubber rings to expand as a whole, so that when pipe one and pipe two reach the preset second fastening position, the locking is completed.

[0005] The rubber connector designed by the above invention realizes the connection of two pipes with different diameters through multiple rubber rings connected by inner and outer sleeves. However, the connector is separated from the pipe, and a connector needs to be prepared separately when the pipes need to be connected with a difference, which is not convenient. Moreover, although the above connector realizes the differential connection by setting multiple rubber rings, each rubber ring has a fixed size and thickness, and cannot be completely stepless to adapt to the connection of pipes with different diameters. When the gap between the two pipes cannot accommodate an integer multiple of the rubber ring, there will still be a gap at the connection of the pipes, and the gap still needs to be filled.

[0006] Therefore, a PVC pipe with a prefabricated rubber ring structure is proposed. Summary of the invention

[0007] The object of the present invention is to provide a PVC pipe with a prefabricated rubber ring structure. By arranging a steplessly expandable rubber ring on the PVC pipe, the diameter of the pipe can be adjusted by expanding the rubber ring during the connection process of pipes with different diameters, so that the connection of the pipe can be adjusted and adapted, so as to solve the problem that pipes with different diameters are difficult to connect and adapt proposed in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A PVC pipe with a prefabricated rubber ring structure includes a pipe body, a rubber ring is arranged at the end of the pipe body, the rubber ring is annular and umbrella-shaped, the annular rubber ring is coaxially arranged on the pipe body, a plurality of elastic plates for supporting the rubber ring are arranged on the pipe body, the plurality of elastic plates are evenly distributed on the pipe body, and an expansion component for opening the rubber ring is also arranged on the pipe body. The expansion component opens the umbrella-shaped rubber ring, so that when the PVC pipe is connected to a pipe larger than itself, the opened rubber ring can be used to make up for the diameter difference between the pipes, so that the connection between the pipes can be mutually adapted, and no additional pipe connector is needed to connect the pipes, which saves the time of pipe connection installation and improves the convenience of pipe connection installation.

[0010] Preferably, the expansion assembly includes a support ring slidably mounted on the tube body, the support ring is provided with an arc-shaped guide portion, the guide portion faces the direction of the rubber ring, and the support ring is tapered as a whole; the outer tube is also provided with a first threaded portion, and the inner ring of the support ring is provided with a second threaded portion for mutual engagement with the first threaded portion. When the guide portion moves in the direction of the rubber ring, the rubber ring is continuously squeezed, and the rubber ring and the elastic plate are fitted with the guide portion under the push of the guide portion. As the support ring continuously moves in the direction of the rubber ring, the umbrella-shaped rubber ring will be continuously opened by the support ring. After the rubber ring is opened, it can make up for the diameter difference when the pipes are connected, so that the gap between the pipes can be closed. The distance between the support ring and the rubber ring is adjusted by the mutual engagement of the first thread and the second thread, so that the size of the rubber ring can be adjusted steplessly, making the connection between the pipes more convenient.

[0011] Preferably, an annular storage cavity is provided inside the support ring, and the storage cavity is used to store polyurethane foaming agent. An injection port is opened on the support ring along the axial direction of the support ring, and the injection port passes through the guide part and is connected with the storage cavity. A sliding rod is slidably provided inside the storage cavity, and the sliding rod is coaxially arranged with the injection port. A closing plug is provided at one end of the sliding rod close to the injection port, and one end of the sliding rod away from the closing plug passes through the support ring and extends out of the storage cavity. A pull plate for grasping is fixedly installed on the end of the sliding rod extending out of the storage cavity, and an extrusion spring is provided inside the storage cavity, and the extrusion spring is evenly wound around the sliding rod, and the extrusion spring is used to press the closing plug onto the injection port to close the injection port.

[0012] After the pipes are connected, pull the slide bar to allow the polyurethane foam to fill between the rubber ring and the guide part. After the polyurethane foam hardens, it can further expand the rubber ring, allowing a larger fit area between the rubber ring and the inner wall of the larger diameter pipe to avoid leakage at the pipe connection. At the same time, the polyurethane foam can also play a certain buffering role on the pipe connection, which can prevent vibration damage during the process of conveying fluids in the pipe.

[0013] Preferably, an annular groove is provided inside the tube body, and a sleeve matching the inner diameter of the tube body is fixed at the inner ring of the rubber ring, and the sleeve is used to be sleeved inside the tube body, and a convex ring is provided on the sleeve, and the convex ring is clamped inside the clasp. Both the sleeve and the clasp are made of soft rubber material. When the polyurethane foaming agent foams and expands, the expanded polyurethane will push the rubber ring in the direction of the principle guide part. At this time, if the rubber ring is directly fixed on the tube body by gluing, since the connection is not a whole, it is easy to break when subjected to force, and the polyurethane is easy to flow from the broken place to the inside of the pipeline to affect the transportation of the pipeline. When the clasp and the rubber ring are made of the same material, when the polyurethane expands and pushes the rubber ring in the direction of the principle guide part, the rubber ring and the clasp are made as one body, and when the rubber ring is stretched by the polyurethane, it is subjected to tension as a whole, thus avoiding the concentration of stress and avoiding the occurrence of damage.

[0014] Preferably, each of the elastic plates is fixedly mounted with a support leg at one end away from the tube body, and the end of the support leg away from the fixed end is folded back toward the tube body and abuts against the outer wall of the tube body, and each of the support legs is provided with one or more avoidance holes. The support legs are made of elastic plastic sheets, which can improve the stability of the elastic plate, prevent the elastic plate from collapsing toward the outer wall of the tube body under the stress of the rubber ring, ensure that the support ring can smoothly enter between the rubber ring and the outer wall of the pipe, ensure that the support ring can open the rubber ring, and thus ensure the stability of the pipe. The multiple avoidance holes are provided on the support legs to allow the polyurethane foaming agent to flow smoothly between the elastic plate and the support legs, avoid the support legs hindering the polyurethane foaming agent from filling the space between the rubber ring and the guide part, and avoid the existence of a cavity between the rubber ring and the guide part. In addition, after the multiple avoidance holes are provided, the polyurethane foaming agent can be more closely connected with the support legs after passing through the avoidance holes and hardening, thereby improving the integrity of the support legs and the polyurethane foaming agent, and improving the overall force effect of the pipe.

[0015] Preferably, a receiving portion is provided on the outer wall of the tube body, and the receiving portion is used to receive the support legs and the elastic plate. After the support legs and the elastic plate are received in the receiving portion, the rubber ring is kept flush with the outer wall of the tube body, so that the tube body can be inserted into a matching pipe.

[0016] Preferably, an inclined guide portion is provided at the connection between the rubber ring and the collar, and a smooth hard layer is fixedly mounted on the guide portion, and the hard layer is made of PVC material. The guide portion helps to guide the tube body during the plug-in process, making it easier to insert the tube body into another pipe. The smooth hard layer can reduce the friction when the pipes are plugged in, further improving the guiding effect and convenience. The hard layer of PVC material can also further reduce the friction when the pipes are plugged in by utilizing the self-lubricating effect of plastic. In addition, after the pipes are connected, the hard layer made of PVC material can withstand the scouring of the fluid transported inside the pipe, preventing the connection between the rubber ring and the collar from being worn and broken by the fluid, thereby ensuring the service life of the rubber ring and avoiding leakage at the pipe connection.

[0017] Preferably, a wavy fold portion is provided on the rubber ring, and the wave crest height of the wavy fold portion is lower than the umbrella surface height of the umbrella-shaped rubber ring.

[0018] When the polyurethane foam expands the rubber ring, the pleated part can extend the area of ​​the rubber ring, preventing the polyurethane foam from expanding the rubber ring and making it thinner, solving the problem that the rubber ring is easily damaged after being washed by the fluid inside the pipe after it becomes thinner, increasing the service life of the rubber ring inside the pipe when the pipe is used, and ensuring the stability of the rubber ring. In addition, the rubber ring can extend a larger area, and when the polyurethane foam expands the rubber ring, while ensuring that the thickness of the rubber ring remains unchanged, that is, ensuring the service life and stability of the rubber ring, the contact area between the rubber ring and the inner wall of the pipe can be increased, further ensuring the sealing effect of the pipe connection.

[0019] The reason why the wave crest height of the wavy folded portion is lower than the umbrella surface height of the umbrella-shaped rubber ring is that when a pipe is inserted into another pipe for connection, the folded portion will not bulge out to affect the insertion connection between the pipes, thereby improving the convenience of pipe connection.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Compared with the existing PVC pipes, the PVC pipe with a prefabricated rubber ring structure designed by the present invention is provided with an umbrella-shaped rubber ring and cooperates with an expansion component, so that the rubber ring can be stretched out under the push of the expansion component, and then the rubber ring can be expanded to adapt to the connection of pipelines with larger diameters, without the need for additional pipe connectors, and the expansion component can achieve stepless adjustment of the expansion degree of the rubber ring through the cooperation of the first thread and the second thread.

[0022] 2. The PVC pipe with a prefabricated rubber ring structure designed by the present invention also has a storage chamber for storing polyurethane foaming agent inside the support ring. The rubber ring is expanded by spraying the polyurethane foaming agent between the rubber ring and the guide part. When the pipeline is connected, the contact area between the rubber ring and the pipeline can be increased, thereby improving the sealing performance when the pipeline is connected. At the same time, the polyurethane foaming agent can also absorb the impact force at the pipeline connection to ensure the connection stability of the pipeline.

[0023] 3. The PVC pipe with a prefabricated rubber ring structure designed by the present invention is also provided with a pleated portion on the rubber ring. When the polyurethane foaming agent expands the rubber ring, the pleated portion can extend the area of ​​the rubber ring to prevent the polyurethane foaming agent from expanding and thinning the rubber ring, thereby ensuring the stability of the rubber ring. In addition, the larger the area that the rubber ring can extend, the more conducive it is to increase the contact area between the rubber ring and the inner wall of the pipe, further ensuring the sealing effect of the pipe connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the tube body and the elastic plate in the present invention;

[0026] Figure 3 It is a front view of the present invention;

[0027] Figure 4 For the present invention Figure 3 Sectional view at AA in the middle;

[0028] Figure 5 This is a schematic diagram of the structure of the present invention when other pipes are inserted;

[0029] Figure 6 For the present invention Figure 5 The enlarged view of point B in the middle;

[0030] Figure 7 It is a schematic diagram of the state when the polyurethane foaming agent fills the gap between the rubber ring and the guide part in the present invention;

[0031] Figure 8 It is a schematic diagram of the state when the rubber ring, the elastic plate and the supporting legs are stored in the storage portion in the present invention.

[0032] In the figure: 1. tube body; 2. rubber ring; 3. elastic plate; 4. support ring; 5. guide part; 6. first threaded part; 7. second threaded part; 8. storage chamber; 9. injection port; 10. slide rod; 11. closing plug; 12. pull plate; 13. extrusion spring; 14. slot; 15. collar; 16. convex ring; 17. support foot; 18. avoidance hole; 19. storage part; 20. guide part; 21. hard layer; 22. pleated part. DETAILED DESCRIPTION

[0033] See also Figures 1 to 8 The present invention provides a PVC pipe with a prefabricated rubber ring structure, and the technical solution is as follows:

[0034] A PVC pipe with a prefabricated rubber ring structure includes a pipe body 1, the pipe body 1 is made of PVC material, a rubber ring 2 is arranged at the end of the pipe body 1, the rubber ring 2 is annular and umbrella-shaped, the annular rubber ring 2 is coaxially arranged on the pipe body 1, and a wavy folded portion 22 is arranged on the rubber ring 2, and the wave crest height of the wavy folded portion 22 is lower than the umbrella surface height of the umbrella-shaped rubber ring 2. Four elastic plates 3 for supporting the rubber ring 2 are fixed on the pipe body 1, and the four elastic plates 3 are evenly distributed on the pipe body 1. A support foot 17 is fixedly installed at one end of each elastic plate 3 away from the pipe body 1. The support foot 17 is made of an elastic plastic sheet, and the end of the support foot 17 away from the fixed end is folded back toward the pipe body 1 and abuts against the outer wall of the pipe body 1, and each support foot 17 is provided with one or five avoidance holes 18. An annular groove 14 is provided inside the tube body 1, and a collar 15 matching the inner diameter of the tube body 1 is fixed to the inner ring of the rubber ring 2. The collar 15 and the rubber ring 2 are both made of soft rubber material and are made as one piece. The collar 15 is used to be sleeved inside the tube body 1, and a convex ring 16 is provided on the collar 15, and the convex ring 16 is clamped inside the collar. An inclined guide part 20 is provided at the connection between the rubber ring 2 and the collar 15, and a smooth hard layer 21 is fixedly installed on the guide part 20, and the hard layer 21 is made of PVC material.

[0035] refer to Figures 6 to 8 A receiving portion 19 is also provided on the outer wall of the tube body 1 , and the receiving portion 19 is used to receive the support leg 17 and the elastic plate 3 . After the support leg 17 and the elastic plate 3 are received in the receiving portion 19 , it is necessary to ensure that the rubber ring 2 remains flush with the outer wall of the tube body 1 .

[0036] refer to Figures 4 to 8The tube body 1 is also provided with an expansion assembly for expanding the rubber ring 2. The expansion assembly includes a support ring 4 slidably sleeved on the tube body 1, and an arc-shaped guide portion 5 is provided on the support ring 4. The guide portion 5 faces the direction of the rubber ring 2, and the support ring 4 is tapered as a whole; a first threaded portion 6 is also provided on the outer tube, and a second threaded portion 7 for meshing with the first threaded portion 6 is provided on the inner ring of the support ring 4. An annular storage chamber 8 is arranged inside the support ring 4, and polyurethane foaming agent is stored inside the storage chamber 8. An injection port 9 is opened on the support ring 4 along the axial direction of the support ring 4, and the injection port 9 passes through the guide part 5 and is connected with the storage chamber 8. A sliding rod 10 is slidingly arranged inside the storage chamber 8, and the sliding rod 10 is coaxially arranged with the injection port 9. A closing plug 11 is arranged at one end of the sliding rod 10 close to the injection port 9, and one end of the sliding rod 10 away from the closing plug 11 passes through the support ring 4 and extends out of the storage chamber 8. A pull plate 12 for grasping is fixedly installed on the end of the sliding rod 10 extending out of the storage chamber 8. An extrusion spring 13 is arranged inside the storage chamber 8, and the extrusion spring 13 is evenly wound around the sliding rod 10. The extrusion spring 13 is used to press the closing plug 11 onto the injection port 9 to close the injection port 9.

[0037] When using, refer to Figure 4 and Figure 8 The umbrella-shaped sealing ring is normally held open by the elastic plate 3 at a certain angle. During the connection process, the pipe material connected to the pipe body 1 matches the pipe body 1. When the pipe body 1 is inserted into other pipe materials, the guide portion 20 at the connection between the rubber ring 2 and the sleeve 15 plays a guiding role, making it easier to insert the pipe material therein. Subsequently, the umbrella-shaped rubber ring 2 is squeezed by the pipe wall of the pipe material into which the pipe body 1 is inserted, and the umbrella-shaped rubber ring 2 is folded back toward the outer wall of the pipe body 1 and stored in the storage portion 19 provided on the pipe body 1. After the rubber ring 2 is flush with the outer wall of the pipe body 1, the pipe body 1 can be smoothly inserted into other pipe materials.

[0038] When the inner diameter of the pipe connected to the pipe body 1 is larger than the outer diameter of the pipe body 1, refer to Figures 5 to 7 After the tube body 1 is inserted into the interior of the tube, the support ring 4 is rotated so that the support ring 4 moves toward the rubber ring 2 under the meshing of the first threaded portion 6 and the second threaded portion 7. As the support ring 4 continues to approach the rubber ring 2, the arc-shaped guide portion 5 on the support ring 4 will first contact the support leg 17 and push the support leg 17 back in the direction of the elastic plate 3. The support leg 17, the elastic plate 3 and the rubber ring 2 in contact with the elastic plate 3 are all stretched open under the push of the guide portion 5, and finally the rubber ring 2 contacts the inner wall of the tube. The guide portion 5 and the inner wall of the tube squeeze and clamp the rubber ring 2 together, and the rubber ring 2 is fixed. At this time, the support ring 4 is also stuck and cannot continue to move in the direction of the rubber ring 2.

[0039] Then, refer to Figure 7, pull the pull plate 12 on the slide bar 10 along the axial direction of the slide bar 10, pull the slide bar 10 in the direction away from the injection port 9 (i.e., away from the rubber ring 2), the closing plug 11 moves with the pull rod and opens the injection port 9, the extrusion spring 13 is compressed, and the polyurethane foaming agent inside the storage chamber 8 is ejected from the injection port 9 and enters the gap between the rubber ring 2 and the guide part 5. The polyurethane foaming agent begins to expand and continues to stretch the rubber ring 2. The folded part 22 on the rubber ring 2 begins to expand after being squeezed by the expanded polyurethane. Under the squeeze of the expanded polyurethane, the rubber ring 2 is continuously pressed against the inner wall of the pipe, the rubber ring 2 is expanded, and the contact area between the rubber ring 2 and the inner wall of the pipe increases.

[0040] During the expansion of polyurethane foam, refer to Figure 6 and Figure 7 , because the convex ring 16 is stuck in the groove 14, and the guide part 5 and the inner wall of the pipe squeeze and clamp the rubber ring 2 together. Therefore, the rubber ring 2 is subjected to tension as a whole, and the convex ring 16 is stuck in the groove 14, and the rubber ring 2 will not be separated from the pipe when it is pulled. Since the first threaded part 6 and the second threaded part 7 are threadedly connected, under the self-locking of the thread, the support ring 4 cannot be pushed away from the rubber ring during the polyurethane foaming process. It is ensured that the tube body 1 will not be separated from the inside of the pipe, and the stability of the connection is guaranteed.

[0041] Finally, when the polyurethane is foamed and hardened, the entire connection process between the PVC pipes is completed.

[0042] refer to Figures 5 to 7 When the diameter of the pipe connected to the pipe body 1 matches the inner diameter of the pipe body 1, since the rubber ring 2 on the pipe body 1 is detachably connected to the pipe body 1, the rubber ring 2 on the pipe body 1 can be removed to allow the pipe to be inserted into the pipe body 1 for connection.

[0043] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A PVC pipe with a prefabricated rubber ring structure, comprising a pipe body (1), characterized in that: A rubber ring (2) is arranged at the end of the tube body (1); the rubber ring (2) is annular and umbrella-shaped; the annular rubber ring (2) is coaxially arranged on the tube body (1); a plurality of elastic plates (3) for supporting the rubber ring (2) are arranged on the tube body (1); the plurality of elastic plates (3) are evenly distributed on the circumference of the tube body (1); and an expansion component for expanding the rubber ring (2) is also arranged on the tube body (1).

2. The PVC pipe with a prefabricated rubber ring structure according to claim 1, characterized in that: The expansion assembly comprises a support ring (4) slidably mounted on a tube body (1); an arc-shaped guide portion (5) is arranged on the support ring (4); the guide portion (5) faces the direction of the rubber ring (2); and the support ring (4) is tapered as a whole; a first threaded portion (6) is also arranged on the outer tube; and a second threaded portion (7) for meshing with the first threaded portion (6) is arranged on the inner ring of the support ring (4).

3. The PVC pipe with a prefabricated rubber ring structure according to claim 2, characterized in that: The support ring (4) is provided with an annular storage cavity (8) inside, and the storage cavity (8) is used to store the polyurethane foaming agent. The support ring (4) is provided with an injection port (9) along the axial direction of the support ring (4), and the injection port (9) passes through the guide portion (5) and is connected to the storage cavity (8). A sliding rod (10) is slidably provided inside the storage cavity (8), and the sliding rod (10) is coaxially arranged with the injection port (9), and a sealing plug is provided at one end of the sliding rod (10) close to the injection port (9). (11), one end of the slide rod (10) away from the closing plug (11) passes through the support ring (4) and extends out of the storage cavity (8), and the end of the slide rod (10) extending out of the storage cavity (8) is fixedly installed with a pull plate (12) for grasping, and a compression spring (13) is arranged inside the storage cavity (8), and the compression spring (13) is evenly wound on the slide rod (10), and the compression spring (13) is used to press the closing plug (11) onto the injection port (9) to close the injection port (9).

4. The PVC pipe with a prefabricated rubber ring structure according to claim 3, characterized in that: An annular clamping groove (14) is arranged inside the tube body (1), a sleeve ring (15) matching the inner diameter of the tube body (1) is fixed on the inner ring of the rubber ring (2), the sleeve ring (15) is used to be sleeved inside the tube body (1), and a convex ring (16) is arranged on the sleeve ring (15), and the convex ring (16) is clamped inside the clamping ring.

5. The PVC pipe with a prefabricated rubber ring structure according to claim 3, characterized in that: A support foot (17) is fixedly mounted on one end of each elastic plate (3) away from the tube body (1); one end of each support foot (17) away from the fixed end is folded back toward the tube body (1) and abuts against the outer wall of the tube body (1); and one or more avoidance holes (18) are provided on each support foot (17).

6. The PVC pipe with a prefabricated rubber ring structure according to claim 3, characterized in that: The outer wall of the tube body (1) is also provided with a receiving portion (19), and the receiving portion (19) is used to receive the supporting legs (17) and the elastic plate (3).

7. The PVC pipe with a prefabricated rubber ring structure according to claim 4, characterized in that: An inclined guide portion (20) is provided at the connection between the rubber ring (2) and the sleeve ring (15), and a smooth hard layer (21) is fixedly mounted on the guide portion (20), and the hard layer (21) is made of PVC material.

8. The PVC pipe with a prefabricated rubber ring structure according to claim 3, characterized in that: The rubber ring (2) is provided with a wave-shaped folded portion (22), and the wave crest height of the wave-shaped folded portion (22) is lower than the umbrella surface height of the umbrella-shaped rubber ring (2).

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