High-cavity multi-layer steel wire composite pipe

Abstract

A high-cavity multi-layer steel wire composite pipe relates to the technical field of water supply pipelines and comprises a main body pipeline, the outer end face of the main body pipeline is connected with an outer reinforcing rib, and the outer reinforcing rib is integrally formed and is spirally wound and fixed with the main body pipeline; the cross section of the outer reinforcing rib is polygonal, the outer reinforcing rib comprises an outer supporting part, connecting parts are arranged on the two sides of the outer supporting part, and an inner supporting part connected with the main pipeline is arranged at the end, away from the outer supporting part, of each connecting part; a cavity is formed in the outer reinforcing rib, and the length of the outer supporting part is smaller than that of the inner supporting part. A plastic-coated steel wire is embedded in the inner supporting part. Compared with a single-point extrusion mode of a circular section, the extrusion force can be shared at multiple points, the stability of the outer reinforcing ribs is improved, and the deformation degree of the outer reinforcing ribs is relieved; and secondly, through the arc shape of the outer supporting part and the fillet structure of the connecting position, on one hand, the buffering capacity of the outer supporting part can be improved, on the other hand, the contact area between the fillet and the outside is larger, and extrusion force is effectively decomposed.

Description

Technical Field

[0001] This utility model relates to the field of water supply pipeline technology, specifically to a high-cavity multi-layer steel wire composite pipe. Background Technology

[0002] In water supply and drainage pipeline systems, plastic pipes have gradually replaced traditional pipes such as cast iron pipes and galvanized steel pipes, becoming the mainstream pipe materials. The most commonly used plastic pipes in water supply pipelines include PVC-U water supply pipes, PP-R pipes, aluminum-plastic composite pipes (PAP), steel-plastic composite pipes (SP), and HDPE composite pipes. HDPE composite pipes are manufactured using advanced processes and technologies through hot extrusion. They feature corrosion resistance, smooth inner walls, low flow resistance, high strength, good toughness, and light weight. They are primarily used in municipal water supply systems, building indoor water supply systems, outdoor buried water supply systems, residential and factory buried water supply systems, old pipeline repair, water treatment engineering pipeline systems, and industrial water pipes for landscaping, irrigation, and other fields. Existing HDPE composite pipes typically consist of a main pipe and external spirally wound reinforcing ribs to improve the main pipe's resistance to compression. Current reinforcing ribs usually use a single-layer PP hollow pipe with a circular cross-section. However, while a circular single-layer pipe is convenient for production and winding, its supporting strength is limited. After the pipe is laid, the circular hollow pipe cannot effectively buffer the stress points, making the reinforcing ribs prone to deformation. Furthermore, the end face strength at the connection with the main pipe is low, reducing its supporting effect on the main pipe. Utility Model Content

[0003] To address the technical problems existing in the background art, this utility model provides a high-cavity multilayer steel wire composite pipe.

[0004] The technical solution of this utility model is as follows:

[0005] A high-cavity multi-layer steel wire composite pipe includes a main pipe, and an external reinforcing rib is connected to the outer end face of the main pipe. The external reinforcing rib is integrally formed and spirally wound and fixed with the main pipe.

[0006] The cross-sectional shape of the external reinforcing rib is polygonal, including an external support portion. Connecting portions are provided on both sides of the external support portion, and an internal support portion connected to the main pipe is provided at the end of the connecting portion away from the external support portion.

[0007] The outer reinforcing rib has a cavity inside, and the length of the outer support part is less than the length of the inner support part;

[0008] The inner support section is embedded with plastic-coated steel wire.

[0009] To improve the supporting strength of the outer reinforcing ribs and enhance the buffering effect, the outer support part is an arc shape with both ends higher than the middle, and the connection position between the outer support part and the connecting part is a rounded corner structure.

[0010] To improve the support effect of the plastic-coated steel wire on the inner support, multiple plastic-coated steel wires are arranged at intervals, and the length covered by the multiple plastic-coated steel wires is not less than 1 / 2 of the inner support layer.

[0011] To ensure the support strength of the outer support, the length of the outer support is not less than 1 / 2 of the length of the inner support, and the distance between the two is greater than the length of the outer support.

[0012] To improve the deformation resistance and buffering effect of the connection, the connection is set to be arc-shaped, and its middle part is bent towards the side closer to the cavity relative to both ends.

[0013] To improve the deformation resistance of the external reinforcing ribs, the cavity is provided with supporting ribs, and the cross-sectional shape of the supporting ribs is polygonal, which are respectively bonded and fixed to the outer support part, the inner support part and the connecting part.

[0014] The specific setting and installation method of the support rib is as follows: the cross-sectional shape of the support rib is hexagonal, and two opposite sides are fixed to the inner wall of the inner support and the inner wall of the outer support, respectively, and two opposite corners abut against the two connecting parts.

[0015] In order to release the stress generated by the compression of the support rib, multiple dispersion holes are opened in the support rib, and the multiple dispersion holes are arranged in a cross shape.

[0016] To ensure that the supporting ribs provide better support to the supporting part, the length of the two opposite sides of the supporting ribs that contact the inner and outer supporting parts is 2 / 3 to 3 / 4 of the length of the outer supporting part.

[0017] To ensure the flow rate of the medium inside the main pipeline, a lubricating layer is provided on the inner wall of the main pipeline.

[0018] The beneficial effects of this utility model are as follows: This utility model is a high-cavity multi-layer steel wire composite pipe. Unlike the single-layer circular outer reinforcing rib in the prior art, this solution firstly adopts a polygonal cross-sectional shape for the outer reinforcing rib, and the length of the outer support part is less than the length of the inner support part. This allows the outer support part to have multiple points of contact with the outside during support. Compared with the single-point compression of the circular cross-section, it can distribute the extrusion force at multiple points, improve the stability of the outer reinforcing rib, and reduce the degree of deformation of the outer reinforcing rib. Secondly, through the arc shape of the outer support part and the rounded corner structure at the connection position, on the one hand, the buffering capacity of the outer support part can be improved, and on the other hand, the contact area between the rounded corner and the outside is larger, effectively dispersing the extrusion force. Finally, through the design of the steel wire layer, the strength of the inner support part is improved, so that the outer reinforcing rib can provide good support to the outside of the main pipe and ensure the strength of the support. Attached Figure Description

[0019] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0020] In the attached diagram:

[0021] Figure 1 This is a schematic diagram of the overall structure of this solution;

[0022] Figure 2 This is a partial cross-sectional view of the scheme;

[0023] Figure 3 This is a magnified view of point A;

[0024] Figure 4 This is a schematic diagram of a scheme with supporting reinforcement bars;

[0025] Figure 5 This is a magnified view of point B;

[0026] The components represented by the various reference numerals in the diagram are:

[0027] 1. Main pipe; 2. External reinforcing rib; 21. External support; 22. Connecting part; 23. Internal support; 24. Cavity; 25. Plastic-coated steel wire; 26. Supporting rib; 27. Dispersion hole; 3. Lubricating layer. Detailed Implementation

[0028] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0029] Example

[0030] As mentioned in the background section, existing HDPE composite drainage pipes are prone to deformation and have low strength during actual use. This is mainly due to the design structure of the external reinforcing ribs 2 on the outside of the main pipe 1. The existing external reinforcing ribs 2 are usually designed with a circular cross-section for ease of manufacturing. However, the circular external reinforcing ribs 2 are very prone to single-point stress or simultaneous compression of the outer edge, resulting in severe deformation. Therefore, the inventors have innovated and designed a composite pipe with a new type of external reinforcing rib 2 structure. The following is a detailed explanation with reference to the illustrations.

[0031] This embodiment provides a high-cavity multilayer steel wire composite tube, see [link]. Figure 1 and Figure 2 The system includes a main pipe 1, which is made of HDPE material and is mainly manufactured through processes such as extrusion and winding. The cross-sectional shape is circular, which can be achieved using existing technology. The inner wall of the main pipe 1 is provided with a lubrication layer 3, which mainly uses a rubber solid lubricant, which is widely used in this field and will not be described in detail. The purpose is to increase the flow rate of the medium in the main pipe 1. The outer end face of the main pipe 1 is connected to an external reinforcing rib 2. The external reinforcing rib 2 is integrally formed and spirally wound and fixed to the main pipe 1. The external reinforcing rib 2 and the main pipe 1 are fixed by melting and bonding at high temperature. After cooling, the main pipe 1 and the external reinforcing rib 2 form an integral structure.

[0032] In this embodiment, unlike the prior art, it combines... Figure 3 The outer reinforcing rib 2 has a polygonal cross-sectional shape, which can form multi-point support with the outside. Specifically, the outer reinforcing rib 2 includes an outer support part 21, which is the side away from the main pipe 1. The outer support part 21 has connecting parts 22 on both sides, and the end of the connecting part 22 away from the outer support part 21 is provided with an inner support part 23 connected to the main pipe 1. In this solution, the cross-sectional shape of the outer reinforcing rib 2 is quadrilateral, specifically designed to resemble an isosceles trapezoid. The outer reinforcing rib 2 has a cavity 24 inside, which provides space for the compression deformation of the outer reinforcing rib 2. The cavity 24 is in the shape of an isosceles trapezoid. The length of the support part is less than the length of the inner support part 23. However, the outer support part 21 is an arc shape with both ends higher than the middle. The arc-shaped outer support part 21 can improve the buffering effect when the outer support part 21 is compressed. The connection position between the outer support part 21 and the connecting part 22 is a rounded corner structure, which can increase the contact area with the outside, thereby sharing the compressive force and reducing the degree of deformation.

[0033] It should be noted that the length of the outer support part 21 is not less than 1 / 2 of the length of the inner support part 23, and the distance between the two is greater than the length of the outer support part 21, so as to ensure that the outer support part 21 has a large support area. Moreover, the distance between the two is set to ensure that the outer support part 21 has a large deformation space and less squeezing damage to the main pipe 1.

[0034] Based on the above structure, in order to improve the strength of the inner support part 23 connected to the main pipe 1, the inner support part 23 is embedded with plastic-coated steel wires 25. Specifically, multiple plastic-coated steel wires 25 are arranged at intervals, and the length covered by multiple plastic-coated steel wires 25 is not less than 1 / 2 of the inner support layer, ensuring that the plastic-coated steel wires 25 have a large support space for the inner support part 23, thereby improving the strength of the inner support part 23. Consequently, when the outer reinforcing rib 2 is compressed, the inner support part 23 can have sufficient support strength to protect the main pipe 1.

[0035] In this embodiment, combined with Figure 4 To further support the external reinforcing ribs, a support component is provided within the cavity 24. This support component includes a support rib 26 within the cavity 24. The support rib 26 is made of elastic high-density polyethylene and has a polygonal cross-sectional shape. It is bonded and fixed to the outer support part 21, the inner support part 23, and the connecting part 22. Through the design of the support rib 26, the outer support part 21, the inner support part 23, and the connecting part 22 can be supported respectively. In this design, the connecting part 22 is set as an arc shape, with its middle section bent towards the side closer to the cavity 24 relative to both ends. By designing the connecting part 22 as an arc shape, similar to the design of the outer support part 21, the connecting part 22 can improve the buffering effect when deformed and prevent the problem that a straight shape is not easy to return to its original shape after deformation.

[0036] Specifically, in combination Figure 5 The supporting rib 26 has a hexagonal cross-section, with two opposite sides fixed to the inner walls of the inner and outer supporting parts 21, respectively, and two opposite corners abutting against the two connecting parts 22. Since the outer supporting part 21 is easily compressed by external forces, in this design, the side length of the hexagon is connected and fixed to the outer supporting part 21 and the inner supporting part 23, increasing the supporting area of ​​the outer supporting part 21 and ensuring the supporting strength. The two opposite corners support the connecting parts 22, ensuring the compressive strength of the arc-shaped connecting parts 22. Furthermore, the supporting rib 26 is elastic and can also support the connecting parts 22 and the outer supporting part 21 to return to their original shape. In addition, the length of the two opposite sides of the supporting rib 26 that contact the inner supporting part 23 and the outer supporting part 21 is 2 / 3 to 3 / 4 of the length of the outer supporting part 21, ensuring that the supporting rib 26 has a large supporting area for the outer supporting part 21, further improving the supporting strength.

[0037] Based on the above structure, the supporting rib 26 has multiple dispersion holes 27. By setting the dispersion holes 27, when the outer reinforcing rib 2 is compressed, the supporting rib 26 will deform. The dispersion holes 27 can release some of the stress and slow down the deformation of the supporting rib 26. Moreover, the multiple dispersion holes 27 are arranged in a cross shape, which can release stress when the outer reinforcing rib 2 is subjected to horizontal and vertical compressive forces.

Claims

1. High-cavity multilayer steel wire composite pipe comprising a main pipe (1), characterized in that, The outer end surface of the main pipeline (1) is connected with an outer reinforcing rib (2), which is integrally formed and spirally wound and fixed with the main pipeline (1); The outer reinforcing rib (2) has a polygonal cross-sectional shape, including an outer support part (21), both sides of which are provided with a connecting part (22), and the end of the connecting part (22) away from the outer support part (21) is provided with an inner support part (23) connected with the main pipeline (1); The outer reinforcing rib (2) is internally provided with a cavity (24), and the length of the outer support part (21) is less than the length of the inner support part (23); The inner support part (23) is internally embedded with a plastic-coated steel wire (25).

2. The high cavity multi-layer steel wire composite pipe according to claim 1, characterized in that, The outer support part (21) is arc-shaped with both ends higher than the middle, and the connection position of the outer support part (21) and the connecting part (22) is a round corner structure.

3. The high cavity multi-layer steel wire composite pipe according to claim 1, characterized in that, The plastic-coated steel wire (25) is arranged in multiple rows, and the length covered by the multiple plastic-coated steel wires (25) is not less than 1 / 2 of the length of the inner support layer.

4. The high cavity multi-layer steel wire composite pipe according to claim 1, characterized in that, The length of the outer support part (21) is not less than 1 / 2 of the length of the inner support part (23), and the distance between them is greater than the length of the outer support part (21).

5. The high cavity multi-layer steel wire composite pipe according to claim 1, characterized in that, The connecting part (22) is arranged in an arc shape, and the middle part thereof is curved towards the side closer to the cavity (24) relative to both ends.

6. The high cavity multi-layer steel wire composite pipe according to claim 5, characterized in that, The cavity (24) is provided with a support rib (26), and the support rib (26) has a polygonal cross-sectional shape and is adhesively fixed with the outer support part (21), the inner support part (23), and the connecting part (22).

7. The high cavity multi-layer steel wire composite pipe according to claim 6, characterized in that, The support rib (26) has a hexagonal cross-sectional shape, and two opposite sides thereof are respectively fixed with the inner support part and the outer support part (21), and two opposite corners thereof respectively abut against two connecting parts (22).

8. The high cavity multi-layer steel wire composite pipe according to claim 6, characterized in that, The support rib (26) is internally provided with multiple dispersion holes (27), and the multiple dispersion holes (27) are arranged in a cross shape.

9. The high cavity multi-layer steel wire composite pipe according to claim 7, characterized in that, The length of the two opposite sides of the support rib (26) in contact with the inner support part (23) and the outer support part (21) is 2 / 3-3 / 4 of the length of the outer support part (21).

10. The high cavity multi-layer steel wire composite pipe according to claim 1, characterized in that, The inner wall of the main pipeline (1) is provided with a lubricating layer (3).

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