Wear-resistant polyethylene pipe

Abstract

The utility model provides a wear-resistant polyethylene pipe, which solves the problems of insufficient wear resistance and the like of a polyethylene pipe, and comprises a main pipe body made of polyethylene materials, wear-resistant ribs which are arranged in a central symmetry manner are distributed on the outer side of the main pipe body along the circumferential direction, and the wear-resistant ribs axially extend or spirally extend along the main pipe body. The top of the wear-resistant rib is coated with a wear-resistant ceramic coating, and a radial supporting assembly is arranged in the main pipe body. The utility model has the advantages of good abrasive resistance, high structural strength and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of composite pipes, and in particular relates to a wear-resistant polyethylene pipe. Background Art

[0002] In the water supply and drainage pipeline system, plastic pipes have gradually replaced traditional pipes such as cast iron pipes and galvanized steel pipes and become the mainstream pipes. Compared with traditional pipes, plastic pipes have significant advantages such as light weight, corrosion resistance, small water flow resistance, energy saving, easy and quick installation, and low cost, and are loved by the pipeline engineering industry. Among them, polyethylene pipes have good hygienic properties. As water pipes, they can effectively solve the secondary pollution of urban drinking water. However, in actual use, due to its insufficient surface hardness, its wear resistance is poor, and it is easy to be damaged during assembly movement friction. In addition, the existing polyethylene pipes have high mechanical property requirements and need to be able to withstand continuous impact, wear and corrosion.

[0003] In order to solve the shortcomings of the existing technology, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a wear-resistant polyethylene pipe and its preparation method and application [202310737890.3], which includes a wear-resistant inner layer and an outer layer; the material of the wear-resistant inner layer includes ultra-high molecular weight polyethylene, high-density polyethylene, wear-resistant modified material, untangling agent and inorganic filler, and the wear-resistant modified material includes at least one of silicon nitride, titanium nitride, aluminum nitride, boron carbide and silicon carbide; the material of the outer layer includes high-density polyethylene, chopped glass fiber and silane coupling agent.

[0004] The above solution solves the problem of insufficient mechanical properties of polyethylene pipes to a certain extent, but the solution still has many shortcomings, such as poor wear resistance and easy wear. Summary of the invention

[0005] The utility model aims to solve the above problems and provide a wear-resistant polyethylene pipe with reasonable design and good wear resistance.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a wear-resistant polyethylene pipe, comprising a main body made of polyethylene, the outer side of the main body is provided with wear-resistant ribs arranged symmetrically along the circumferential direction, the wear-resistant ribs extend axially or spirally along the main body, the top of the wear-resistant ribs are coated with a wear-resistant ceramic coating, and a radial support assembly is arranged inside the main body.

[0007] In the above-mentioned wear-resistant polyethylene pipe, a secondary pipe body extending in the axial direction is arranged inside the main pipe body, an isolation cavity is left between the main pipe body and the secondary pipe body, and the radial support assembly is arranged in the isolation cavity.

[0008] In the above-mentioned wear-resistant polyethylene pipe, the radial support assembly includes support ribs connected between the main pipe body and the auxiliary pipe body, a cavity with a triangular cross-section is left between the support ribs, and the main pipe body, the auxiliary pipe body and the support ribs are integrally formed.

[0009] In the above-mentioned wear-resistant polyethylene pipe, a protective layer made of polyvinyl chloride is provided inside the auxiliary pipe body, and the thickness of the protective layer is 1.5-2.4 mm.

[0010] In the above-mentioned wear-resistant polyethylene pipe, the cross section of the wear-resistant rib is triangular or wavy, the height of the wear-resistant rib relative to the main pipe body is 2.0-3.5 mm, and the width of the middle part of the wear-resistant rib is not less than 2.2 mm.

[0011] In the above-mentioned wear-resistant polyethylene pipe, the thickness of the wear-resistant ceramic coating is 0.4-0.7 mm.

[0012] In the above-mentioned wear-resistant polyethylene pipe, the main pipe body is equipped with a transition sleeve, a limiting component is arranged between the transition sleeve and the wear-resistant rib, and a bite component is arranged inside the transition sleeve and the main pipe body.

[0013] In the above-mentioned wear-resistant polyethylene pipe, the limiting assembly includes a limiting groove arranged at the port of the adapter sleeve and for the wear-resistant rib to be inserted into, and the space between the limiting groove and the outer side of the main pipe body is filled with sealant.

[0014] In the above-mentioned wear-resistant polyethylene pipe, the bite assembly includes a bite tube arranged on the inner side of the adapter sleeve, the bite tube is interference fit with the inner side of the main pipe, and anti-skid particles are distributed on the bite tube.

[0015] In the above-mentioned wear-resistant polyethylene pipe, the adapter sleeve is any one or more combinations of a straight pipe, a curved pipe, and a multi-way pipe.

[0016] Compared with the existing technology, the advantages of the utility model are: the wear-resistant ribs are raised relative to the main pipe body, and the wear-resistant ceramic coating on the top thereof is subjected to local contact friction, and cooperates with the radial support assembly to ensure its mechanical properties while improving the overall wear resistance; the main pipe body and the auxiliary pipe body adopt a sandwich structure, and the composite structure can effectively improve the overall structural strength of the pipe body and can withstand long-term continuous impact; a protective layer is coated on the inner side of the auxiliary pipe body to ensure its internal corrosion resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a structural sectional view of the utility model;

[0019] Figure 3 It is a partial cross-sectional view of the utility model;

[0020] Figure 4 It is an assembly cross-sectional view of the adapter sleeve of the utility model;

[0021] In the figure, the main pipe body 1, wear-resistant ribs 2, wear-resistant ceramic coating 3, radial support assembly 4, support ribs 41, auxiliary pipe body 5, protective layer 51, isolation cavity 6, adapter sleeve 7, limit groove 71, sealant 72, bite tube 73, anti-skid particles 74. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] like Figure 1-4 As shown, a wear-resistant polyethylene pipe includes a main body 1 made of polyethylene, and different grades of materials are selected according to actual needs. Different from the conventional pipe structure, the outer side of the main body 1 is circumferentially distributed with wear-resistant ribs 2 arranged in a central symmetrical manner. The wear-resistant ribs 2 are in a convex structure and extend axially or spirally along the main body 1. When the pipe body 1 contacts the external plane, the wear-resistant ribs 2 are in local contact and pressure-bearing. The top of the wear-resistant ribs 2 is coated with a wear-resistant ceramic coating 3 to improve its local wear resistance, and a radial support assembly 4 is arranged in the main body 1. Compared with conventional wear-resistant pipes, the main body 1 in the present application is partially coated with a wear-resistant ceramic coating 3 to reduce the processing cost while still maintaining good wear resistance. At the same time, the wear-resistant ribs 2 cooperate with the radial support assembly 4 to maintain the overall mechanical properties.

[0024] Specifically, an auxiliary tube body 5 extending axially is arranged on the inner side of the main tube body 1, and an isolation cavity 6 is left between the main tube body 1 and the auxiliary tube body 5 to form a sandwich structure. The radial support assembly 4 is arranged in the isolation cavity 6 to improve its radial support stability, and the isolation cavity 6 between them plays a buffering and protective role for the auxiliary tube body 5 on the inner side.

[0025] In depth, the radial support assembly 4 includes support ribs 41 connected between the main body 1 and the auxiliary body 5, and a cavity with a triangular cross section is left between the support ribs 41. The main body 1, the auxiliary body 5 and the support ribs 41 are integrally formed, which are usually formed by extrusion. The support ribs 41 are divided into a plurality of independent cavities, which are arranged in a central symmetric manner and are opposite to the wear-resistant ribs 2.

[0026] Furthermore, in order to improve the corrosion resistance of the polyethylene tube, a protective layer 51 made of polyvinyl chloride is provided inside the auxiliary tube 5, and the thickness of the protective layer 51 is 1.5-2.4 mm. The polyethylene selected for the main tube 1 can be modified to further improve its chemical stability.

[0027] Furthermore, the cross section of the wear-resistant rib 2 is triangular or wavy, the height of the wear-resistant rib 2 relative to the main body 1 is 2.0-3.5 mm, and the width of the middle part of the wear-resistant rib 2 is not less than 2.2 mm. By limiting the width and height specifications of the wear-resistant rib 2, it is ensured that it has good structural strength and sufficient deformation buffering capacity.

[0028] In addition, the wear-resistant ceramic coating 3 has a thickness of 0.4-0.7 mm, and a 0.5 mm wear-resistant ceramic coating 3 is usually selected. Compared with other wear-resistant layers, it has better affinity with the polyethylene main pipe 1 and is not easily peeled off by external impact.

[0029] At the same time, the main pipe body 1 is equipped with a transfer sleeve 7 to realize the one-by-one connection of multiple groups of pipe bodies. A limiting component is set between the transfer sleeve 7 and the wear-resistant rib 2 to realize circumferential limiting. A bite component is set between the transfer sleeve 7 and the inner side of the main pipe body 1 to realize axial locking.

[0030] It can be seen that the limiting assembly includes a limiting groove 71 arranged at the end of the adapter tube sleeve 7 and for the wear-resistant rib 2 to be inserted, and a sealant 72 is filled between the limiting groove 71 and the outer side of the main tube 1. The sealant 72 completely fills the gap between the wear-resistant rib 2 and the limiting groove 71, and part of the sealant 72 squeezes into the isolation cavity 6 to play a bonding role.

[0031] Obviously, the bite assembly does not need an external locking member, and includes a bite tube 73 disposed inside the adapter tube sleeve 7, the bite tube 73 is interference fit with the inside of the main tube body 1, and anti-skid particles 74 are distributed on the bite tube 73. The bite tube 73 is usually inserted into the auxiliary tube body 5, and the anti-skid particles 74 are pressed and embedded with the inner side of the anti-skid particles 74.

[0032] Preferably, the adapter sleeve 7 is any one or more combinations of a straight pipe, a curved pipe, and a multi-way pipe. Different adapter sleeves 7 are selected according to actual pipe connection requirements. A single adapter sleeve 7 may have multiple adapter interfaces.

[0033] To sum up, the principle of this embodiment is that wear-resistant ribs 2 are arranged on the outside of the main body 1, local contact friction is performed on the top of the wear-resistant ribs 2, and the contact parts are coated with wear-resistant ceramic coatings 3 for local reinforcement, which cooperate with the radial support assembly 4 to maintain the structural strength while reducing the use of wear-resistant ceramic coatings 3.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0035] Although this article uses more terms such as main body 1, wear-resistant ribs 2, wear-resistant ceramic coating 3, radial support assembly 4, support ribs 41, auxiliary body 5, protective layer 51, isolation cavity 6, adapter sleeve 7, limit groove 71, sealant 72, bite tube 73, anti-skid particles 74, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A wear-resistant polyethylene pipe, comprising a main pipe body (1) made of polyethylene, characterized in that: The outer side of the main pipe (1) is provided with wear-resistant ribs (2) distributed in a centrally symmetrical manner along the circumferential direction, the wear-resistant ribs (2) extend axially or spirally along the main pipe (1), the top of the wear-resistant ribs (2) is coated with a wear-resistant ceramic coating (3), and a radial support assembly (4) is arranged inside the main pipe (1).

2. The wear-resistant polyethylene pipe according to claim 1, characterized in that: A secondary tube body (5) extending in the axial direction is arranged inside the main tube body (1), an isolation cavity (6) is left between the main tube body (1) and the secondary tube body (5), and the radial support assembly (4) is arranged in the isolation cavity (6).

3. A wear-resistant polyethylene pipe according to claim 2, characterized in that: The radial support assembly (4) comprises support ribs (41) connected between the main pipe body (1) and the auxiliary pipe body (5), a cavity with a triangular cross-section is left between the support ribs (41), and the main pipe body (1), the auxiliary pipe body (5) and the support ribs (41) are integrally formed.

4. The wear-resistant polyethylene pipe according to claim 2, characterized in that: A protective layer (51) made of polyvinyl chloride is arranged on the inner side of the auxiliary tube body (5), and the thickness of the protective layer (51) is 1.5-2.4 mm.

5. The wear-resistant polyethylene pipe according to claim 1, characterized in that: The cross section of the wear-resistant rib (2) is triangular or wavy, the height of the wear-resistant rib (2) relative to the main pipe (1) is 2.0-3.5 mm, and the width of the middle part of the wear-resistant rib (2) is not less than 2.2 mm.

6. The wear-resistant polyethylene pipe according to claim 1, characterized in that: The wear-resistant ceramic coating (3) has a thickness of 0.4-0.7 mm.

7. The wear-resistant polyethylene pipe according to claim 1, characterized in that: The main pipe body (1) is equipped with a transfer pipe sleeve (7), a limit position component is arranged between the transfer pipe sleeve (7) and the wear-resistant rib (2), and a bite component is arranged between the transfer pipe sleeve (7) and the inner side of the main pipe body (1).

8. The wear-resistant polyethylene pipe according to claim 7, characterized in that: The limiting assembly comprises a limiting groove (71) arranged at the end of the adapter tube sleeve (7) and for the wear-resistant rib (2) to be inserted into, and a sealant (72) is filled between the limiting groove (71) and the outer side of the main tube (1).

9. The wear-resistant polyethylene pipe according to claim 7, characterized in that: The bite assembly comprises a bite tube (73) arranged on the inner side of the adapter tube sleeve (7), the bite tube (73) is interference fit with the inner side of the main tube (1), and anti-skid particles (74) are distributed on the bite tube (73).

10. The wear-resistant polyethylene pipe according to claim 7, characterized in that: The transfer tube sleeve (7) is any one or more combinations of a straight tube, a curved tube, and a multi-way tube.

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