Steel-plastic composite winding top-pull pipe

Abstract

The utility model relates to pipeline technical field, concretely relates to a kind of winding top-pull pipe of steel-plastic composite, including composite layer pipe body, the end of composite layer pipe body integrally formed has end pipe, and the other end of composite layer pipe body is fixedly installed on the inner wall of composite layer pipe body and has inner limiting ring, end pipe screw thread connection chamber is arranged in the composite layer pipe body of the side of inner limiting ring away from end pipe, and the end pipe on the adjacent two composite layer pipe bodies is screw thread connection between end pipe screw thread connection chamber, the side of inner limiting ring away from end pipe is provided with inner sealing element, and inner sealing element includes outside rubber pad, and there is periphery rubber ring integrally formed on the annular side of outside rubber pad, end pipe is provided with outer sealing element, and inner sealing element and outer sealing element are used for leak protection. The utility model has good sealing effect, and it is convenient for assembly operation.

Description

Technical Field

[0001] This utility model relates to the field of pipeline technology, specifically to a steel-plastic composite spiral wound top-pull pipe. Background Technology

[0002] Pipelines are widely used in various engineering construction projects. Traditional single-material pipes, such as steel pipes, have high strength but poor corrosion resistance. They are prone to rust and damage in humid or corrosive environments, resulting in a shortened service life and increased maintenance costs. While plastic pipes have good corrosion resistance, their strength is relatively low. They are prone to deformation or even breakage when subjected to high pressure or external impact, making them unsuitable for engineering scenarios with high requirements for pipe strength and stability.

[0003] To overcome the aforementioned problems, steel-plastic composite pipes have emerged. Existing steel-plastic composite pipes combine the advantages of both steel and plastic to a certain extent, possessing relatively high strength and corrosion resistance.

[0004] Utility model patent CN220060778U discloses a top-pull pipe, including a pipe body. One end of the pipe body is a socket end, and the other end is a spigot end that can be inserted and plugged into the socket end. The inner wall of the socket end is provided with a plurality of first annular grooves spaced apart, and the outer wall of the spigot end is provided with a plurality of second annular grooves spaced apart. An annular rubber ring is provided within each of the second annular grooves. The outer diameter of the top surface of the annular rubber ring near the spigot end is smaller than the outer diameter of the end away from the spigot end, and the end with the smaller outer diameter has a ducktail-shaped wing. During socket connection, the annular rubber ring seals and engages with the first annular grooves, and the wing abuts against the inner wall of the socket end. The specially shaped annular rubber ring can seal and fix the top-pull pipe, simplifying its structure. Due to the flexible connection method, its requirements for the on-site construction environment are relatively low, and the manufacturing precision requirements for the top-pull pipe can also be reduced accordingly.

[0005] While this technical solution simplifies the structure of the spiral wound top-pull pipe and reduces the precision requirements for its manufacturing, most steel-plastic composite spiral wound top-pull pipes currently in use suffer from leaks due to the lack of corresponding seals at the connection points, as adjacent pipes are connected by threads. Some pipes use multi-layered sealing rings at the threaded connections, which can prevent leaks, but the large number of rings, all located on the outside of the threaded connection, can interfere with the normal installation of the threaded connection and complicate the installation process. Therefore, we propose a steel-plastic composite spiral wound top-pull pipe. Utility Model Content

[0006] The purpose of this invention is to provide a steel-plastic composite spiral wound top-pull pipe to solve the defects mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A steel-plastic composite spiral wound top-pull pipe includes a composite layer pipe body. One end of the composite layer pipe body is integrally formed with an end tube. An inner limiting ring is fixedly installed on the inner wall of the composite layer pipe body at the other end of the composite layer pipe body. An end tube threaded connection chamber is provided in the composite layer pipe body on the side of the inner limiting ring away from the end tube. The end tubes on two adjacent composite layer pipe bodies are threadedly connected to the end tube threaded connection chamber. An inner sealing element is provided on the side of the inner limiting ring away from the end tube. The inner sealing element includes an outer rubber gasket. A peripheral rubber ring is integrally formed on the annular side of the outer rubber gasket. An outer sealing element is sleeved on the end tube. Both the inner sealing element and the outer sealing element are used for leakage prevention protection.

[0009] Preferably, a central hole is provided at the center of the inner limiting ring, and an inner insertion ring is fixedly installed on the side of the outer rubber pad, with the inner insertion ring and the central hole being inserted into each other.

[0010] This feature facilitates the insertion and assembly of the outer rubber pad.

[0011] Preferably, both the inner insertion ring and the outer rubber pad are provided with a flow hole at their center positions, and the flow hole is used for liquid flow operation.

[0012] Preferably, the peripheral rubber ring is attached to the side of the inner limiting ring, and the side of the end tube of an adjacent composite layer tube abuts against the peripheral rubber ring.

[0013] Preferably, the peripheral rubber ring is provided with an internal gas-filled chamber, and the peripheral rubber ring has a ring-shaped structure;

[0014] The above two settings enable the peripheral rubber ring to be compressed between the inner limiting ring and the end tube, and ensure that the peripheral rubber ring fits better between the inner limiting ring and the end tube, thus achieving a better sealing effect.

[0015] Preferably, the outer sealing element is a rubber sealing ring, which abuts against the end faces of two adjacent composite layer tubes.

[0016] Preferably, the size of the peripheral rubber ring is adapted to the size of the composite layer tube, and the size of the rubber sealing ring is adapted to the size of the end tube.

[0017] Preferably, the composite tube body is composed of an outer plastic layer disposed on the outermost layer and an inner plastic layer disposed on the innermost layer, and a winding reinforcement layer is disposed between the outer plastic layer and the inner plastic layer;

[0018] This feature gives the composite tube body good strength and corrosion resistance.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This utility model, by setting an inner sealing element and an outer sealing element, the outer rubber gasket in the inner sealing element is inserted and matched with the inner limiting ring, and the peripheral rubber ring is attached between the inner limiting ring and the end pipe. The rubber sealing ring of the outer sealing element abuts against the end face of the adjacent composite layer pipe body, thereby achieving double sealing protection for the top-pull pipe connection part, effectively solving the problem of easy leakage at the existing top-pull pipe connection part, and achieving the effect of preventing media leakage and ensuring the safety of pipeline transportation.

[0021] 2. This utility model, by setting an inner gas-filled chamber within the peripheral rubber ring and pressurizing it between the end pipe and the inner limiting ring, ensures that the peripheral rubber ring fits better between the two, further enhancing the sealing effect and avoiding the risk of leakage due to poor sealing. It achieves good sealing performance under different working conditions, ensuring the sealing and stability of the pipe connection.

[0022] 3. This utility model designs the composite pipe body as consisting of an outer plastic layer, an inner plastic layer, and a spiral reinforcement layer between them. The outer and inner plastic layers give the pipe body corrosion resistance, while the spiral reinforcement layer enhances the pipe body strength. This achieves the characteristics of both high strength and excellent corrosion resistance, meeting the requirements of complex engineering environments for pipe performance and improving the applicability and service life of the pipe. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0025] Figure 3 This is a cross-sectional view of the inner sealing component of this utility model;

[0026] Figure 4 This is a cross-sectional view of the composite layer tube of this utility model;

[0027] The meanings of the labels in the diagram are as follows:

[0028] 1. Composite layer tube body; 10. End tube; 11. Inner limiting ring; 111. Center hole; 12. Threaded connection chamber of end tube; 13. Outer plastic layer; 14. Spiral reinforcement layer; 15. Inner plastic layer;

[0029] 2. Inner seal; 20. Inner insert ring; 21. Outer rubber gasket; 22. Peripheral rubber ring; 23. Inner gas-filled chamber; 24. Flow hole;

[0030] 3. External sealing element; 30. Rubber sealing ring. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0032] Please see Figures 1-4 This utility model provides a technical solution: a steel-plastic composite spiral jacking pipe, including a composite layer pipe body 1, one end of which is integrally formed with an end pipe 10, and an inner limiting ring 11 is fixedly installed on the inner wall of the composite layer pipe body 1 at the other end. An end pipe threaded connection chamber 12 is provided in the composite layer pipe body 1 on the side of the inner limiting ring 11 away from the end pipe 10. The end pipes 10 on two adjacent composite layer pipe bodies 1 are threadedly connected to the end pipe threaded connection chamber 12, so that the end pipes 10 on two adjacent composite layer pipe bodies 1 are threadedly connected to the end pipe threaded connection chamber 12, forming a stable pipe connection structure, which facilitates the installation and splicing of the pipe, makes the jacking pipe connection operation simpler and more efficient, and meets the needs of pipe laying in engineering construction.

[0033] In this embodiment, an inner sealing element 2 is provided on the side of the inner limiting ring 11 away from the end tube 10. The inner sealing element 2 includes an outer rubber pad 21. A peripheral rubber ring 22 is integrally formed on the annular side of the outer rubber pad 21. A central hole 111 is provided at the center of the inner limiting ring 11. An inner insertion ring 20 is fixedly installed on the side of the outer rubber pad 21. The inner insertion ring 20 and the central hole 111 are inserted and matched, making the assembly operation of the outer rubber pad 21 more convenient. The inner sealing element 2 can be installed in the designated position quickly and accurately, improving the installation efficiency and ensuring the stability of the installation of the inner sealing element 2.

[0034] like Figure 3As shown, flow holes 24 are provided at the center of both the inner insertion ring 20 and the outer rubber pad 21. The flow holes 24 are used for liquid flow operation, so that the liquid can pass smoothly through the inner seal 2, ensuring the continuity of medium flow in the pipeline, avoiding the normal delivery of liquid due to the setting of the seal, and achieving the sealing function without hindering the flow performance of the pipeline.

[0035] Specifically, the peripheral rubber ring 22 is attached to the side of the inner limiting ring 11, and the side of the end pipe 10 at the end of the adjacent composite layer pipe body 1 abuts against the peripheral rubber ring 22. By using the squeezing action of the end pipe 10 and the inner limiting ring 11, the peripheral rubber ring 22 is tightly attached between the two, forming an effective sealing barrier to prevent the medium from leaking from the connection part and to ensure the sealing of the pipeline transportation.

[0036] like Figures 1-3 As shown, an inner gas-filled chamber 23 is provided inside the peripheral rubber ring 22. The peripheral rubber ring 22 has an annular structure, which allows the peripheral rubber ring 22 to adaptively fill the gap when it is compressed between the inner limiting ring 11 and the end pipe 10, further enhancing the sealing effect and improving the reliability of the seal. Even when the pipeline is subjected to external force and undergoes slight displacement or deformation, it can maintain a good sealing state.

[0037] It is worth noting that an outer sealing element 3 is fitted on the end pipe 10. Both the inner sealing element 2 and the outer sealing element 3 are used for leakage protection. The outer sealing element 3 is a rubber sealing ring 30. The rubber sealing ring 30 abuts against the end faces of two adjacent composite layer pipe bodies 1, forming a double sealing structure with the inner sealing element 2. It provides sealing protection from both the inside and outside of the pipeline, which greatly improves the leakage prevention capability of the top-pull pipe connection, effectively reduces the risk of media leakage, and ensures the safety of the pipeline system operation.

[0038] It is worth noting that the size of the peripheral rubber ring 22 is adapted to the size of the composite layer tube 1, and the size of the rubber sealing ring 30 is adapted to the size of the end tube 10, ensuring that the sealing element can fit tightly in the corresponding part, giving full play to the sealing function, avoiding problems such as poor sealing or installation difficulties due to improper sealing element size, and making the sealing structure more reasonable and effective.

[0039] In this embodiment, the composite pipe body 1 is composed of an outer plastic layer 13 disposed on the outermost layer and an inner plastic layer 15 disposed on the innermost layer. A spiral reinforcement layer 14 is disposed between the outer plastic layer 13 and the inner plastic layer 15. The outer plastic layer 13 and the inner plastic layer 15 provide good corrosion resistance, and the spiral reinforcement layer 14 enhances the strength of the pipe body, so that the composite pipe body 1 has both high strength and excellent corrosion resistance, can adapt to complex engineering environments, extend the service life of the pipeline, and reduce maintenance costs.

[0040] Furthermore, the inner plastic layer 15 can be made of corrosion-resistant, wear-resistant, and highly flexible polyethylene or polypropylene material, effectively conveying various media and preventing their erosion of the pipe's interior. The spiral reinforcement layer 14 can be composed of steel strip and fiber-reinforced plastic. The steel strip is spirally wound around the outside of the inner plastic layer 15, providing high-strength support for the pipe and enhancing its ring stiffness and compressive strength. The fiber-reinforced plastic tightly wraps around the surface of the steel strip, further improving the bond between the steel strip and the inner and outer plastic layers, while also enhancing the pipe's tensile and impact resistance. The outer plastic layer 13 can also be made of the same corrosion-resistant plastic material as the inner plastic layer 15, not only protecting the internal structure but also enhancing the overall aesthetics of the pipe.

[0041] When using the steel-plastic composite spiral top-pull pipe of this utility model, the composite layer pipe body 1 is first laid out and positioned. During installation, the end pipe 10 of one composite layer pipe body 1 is aligned with the threaded connection chamber 12 of the end pipe of the adjacent composite layer pipe body 1, and tightened by threaded connection. The inner limiting ring 11 plays a preliminary positioning role to ensure accurate connection.

[0042] Before connection, install the inner sealing element 2, insert the inner insertion ring 20 on the outer rubber pad 21 into the center hole 111 of the inner limiting ring 11, so that the peripheral rubber ring 22 fits against the side of the inner limiting ring 11. Then, put the outer sealing element rubber sealing ring 30 on the end tube 10. When the end tube 10 is screwed into the end tube thread connection chamber 12, the end tube 10 squeezes the peripheral rubber ring 22, causing the gas filling chamber 23 inside to be deformed under pressure, tightly fitting the gap between the end tube 10 and the inner limiting ring 11. At the same time, the rubber sealing ring 30 abuts against the end face of the two composite layer tubes 1, forming a double seal.

[0043] Once the pipeline is connected, it can be put into use. When transporting liquid, the medium flows through the flow hole 24 of the inner insertion ring 20 and the outer rubber pad 21 in the composite layer pipe body 1. Since the composite layer pipe body 1 is composed of an outer plastic layer 13, a spiral reinforcement layer 14 and an inner plastic layer 15, it has both corrosion resistance and high strength characteristics, which can ensure long-term stable transport of the medium in complex environments.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A steel-plastic composite spiral wound top-pull pipe, comprising a composite layer pipe body (1), characterized in that: One end of the composite tube (1) is integrally formed with an end tube (10), and an inner limiting ring (11) is fixedly installed on the inner wall of the composite tube at the other end of the composite tube (1). An end tube threaded connection chamber (12) is provided in the composite tube (1) on the side away from the end tube (10) of the inner limiting ring (11). The end tubes (10) on two adjacent composite tubes (1) are threadedly connected to the end tube threaded connection chamber (12). An inner sealing element (2) is provided on the side of the inner limiting ring (11) away from the end tube (10). The inner sealing element (2) includes an outer rubber pad (21). A peripheral rubber ring (22) is integrally formed on the annular side of the outer rubber pad (21). An outer sealing element (3) is sleeved on the end tube (10). Both the inner sealing element (2) and the outer sealing element (3) are used for leakage protection.

2. The steel-plastic composite spiral wound top-pull pipe according to claim 1, characterized in that: The inner limiting ring (11) has a central hole (111) at its center position, and an inner insertion ring (20) is fixedly installed on the side of the outer rubber pad (21). The inner insertion ring (20) and the central hole (111) are inserted into each other.

3. The steel-plastic composite spiral wound top-pull pipe according to claim 2, characterized in that: Both the inner insertion ring (20) and the outer rubber pad (21) are provided with flow holes (24) at their center positions, and the flow holes (24) are used for liquid flow operations.

4. The steel-plastic composite spiral wound top-pull pipe according to claim 1, characterized in that: The peripheral rubber ring (22) is attached to the side of the inner limiting ring (11), and the side of the end tube (10) of the adjacent composite layer tube (1) abuts against the peripheral rubber ring (22).

5. The steel-plastic composite spiral wound top-pull pipe according to claim 1, characterized in that: The peripheral rubber ring (22) is provided with an internal gas-filled chamber (23), and the peripheral rubber ring (22) is an annular structure.

6. The steel-plastic composite spiral wound top-pull pipe according to claim 1, characterized in that: The outer sealing element (3) is a rubber sealing ring (30), which abuts against the end faces of two adjacent composite layer tubes (1).

7. The steel-plastic composite spiral wound top-pull pipe according to claim 6, characterized in that: The size of the peripheral rubber ring (22) is adapted to the size of the composite layer tube (1), and the size of the rubber sealing ring (30) is adapted to the size of the end tube (10).

8. The steel-plastic composite spiral wound top-pull pipe according to claim 1, characterized in that: The composite tube (1) is composed of an outer plastic layer (13) on the outermost layer and an inner plastic layer (15) on the innermost layer, with a winding reinforcement layer (14) between the outer plastic layer (13) and the inner plastic layer (15).

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