Steel wire mesh skeleton polymer polyethylene wear-resistant pipe and preparation process thereof

Abstract

The application discloses a steel wire mesh framework high polymer polyethylene wear-resistant pipe and a preparation process, and belongs to the technical field of high polymer composite pipe material preparation, and comprises, from inside to outside, coaxially and sequentially: an ultra-high molecular weight polyethylene wear-resistant inner layer, a first modified adhesive resin layer, a medium-density left-handed steel wire main pressure-bearing layer, a first adhesive isolation composite layer, a medium-density right-handed steel wire main pressure-bearing layer, a thickened buffer isolation layer, a low-density right-handed steel wire auxiliary reinforcing layer, a second adhesive isolation composite layer, a low-density left-handed steel wire auxiliary reinforcing layer, a second modified adhesive resin layer and a high-density polyethylene outer layer protection layer. The application is characterized in that a gradient density four-layer symmetrical winding framework is adopted, the main pressure-bearing layer and the auxiliary reinforcing layer are subjected to layered stress, and the application is different from the existing single-layer / double-layer uniform steel wire structure, the pressure resistance is improved, the ring stiffness is considered at the same time, and the pain point that the pressure resistance and the external pressure resistance cannot be considered at the same time is solved.

Description

Technical Field

[0001] This invention belongs to the field of polymer composite pipe preparation technology, and particularly relates to a steel wire mesh skeleton polymer polyethylene wear-resistant pipe and its preparation process. Background Technology

[0002] Steel wire mesh reinforced polyethylene composite pipes are widely used in industrial fluid transportation due to the advantages of steel-plastic combination. Under extreme working conditions such as mine tailings slurry, high-pressure water injection in oil fields, and corrosive chemical slurries, the pipes must simultaneously meet the core requirements of ultra-high pressure load-bearing capacity, high wear resistance, strong corrosion resistance, and creep resistance.

[0003] There are three major insurmountable technical bottlenecks in the existing technology: First, the pressure resistance of conventional single / double-layer steel wire mesh reinforced pipes is only 4.0 MPa. The inner layer is made of ordinary HDPE material, which has insufficient wear resistance and will wear out quickly when transporting media containing particles. Second, some multi-layer steel wire composite pipes use a direct overlapping structure of steel wires without isolation. The bonding resin cannot penetrate between the layers, which easily leads to hollowing, debonding, and stress concentration, and delamination and bursting after short-term pressure. Third, pure UHMWPE pipes have excellent wear resistance, but poor pressure resistance. They are prone to creep and bulging under high pressure and cannot form a stable composite system with the steel wire skeleton. Summary of the Invention

[0004] The purpose of this invention is to provide a steel wire mesh reinforced high molecular weight polyethylene wear-resistant pipe and its preparation process in order to solve the above-mentioned problems.

[0005] On the one hand, in order to achieve the above objectives, the present invention adopts the following technical solution: a steel wire mesh skeleton high molecular weight polyethylene wear-resistant pipe, which includes, from the inside out, the following coaxial composite layers: ultra-high molecular weight polyethylene wear-resistant inner layer, first modified adhesive resin layer, medium density left-handed steel wire main pressure-bearing layer, first adhesive isolation composite layer, medium density right-handed steel wire main pressure-bearing layer, thickened buffer isolation layer, low density right-handed steel wire auxiliary reinforcement layer, second adhesive isolation composite layer, low density left-handed steel wire auxiliary reinforcement layer, second modified adhesive resin layer, and high density polyethylene outer protective layer; The medium-density left-handed steel wire main bearing layer and the medium-density right-handed steel wire main bearing layer are bidirectional symmetrical winding structures with a steel wire coverage of 70% to 80%, forming the core pressure-bearing skeleton of the pipe; the low-density right-handed steel wire auxiliary reinforcement layer and the low-density left-handed steel wire auxiliary reinforcement layer are bidirectional symmetrical winding structures with a steel wire coverage of 50% to 60%, forming the ring stiffness reinforcement skeleton of the pipe. Both the first and second adhesive isolation composite layers are integrally composited from a modified adhesive resin thin layer and a PE functional isolation thin layer; the thickened buffer isolation layer is made of HDPE material and is used to separate the core pressure-bearing skeleton from the ring stiffness reinforcement skeleton to achieve stress layered transfer.

[0006] As a further description of the above technical solution: The ultra-high molecular weight polyethylene wear-resistant inner layer has a viscosity-average molecular weight of 2.5 million to 3.5 million and a wall thickness of 2.0 to 4.0 mm; the high-density polyethylene outer protective layer is made of PE100 grade material and has a wall thickness of 2.5 to 4.0 mm.

[0007] As a further description of the above technical solution: All four steel wire layers use high-strength galvanized bead wire with a diameter of 0.8–1.2 mm, a tensile strength ≥2000 MPa, and a winding angle of 54.7°.

[0008] As a further description of the above technical solution: The modified adhesive resin thin layer is maleic anhydride-grafted PE modified resin, with a single layer thickness of 0.2-0.4 mm; the PE functional isolation thin layer has a thickness of 0.8-1.2 mm, and the thickened buffer isolation layer has a thickness of 1.5-2.0 mm.

[0009] On the other hand, in order to achieve the above objectives, the present invention employs the following method: a process for preparing a steel wire mesh reinforced high-molecular-weight polyethylene wear-resistant pipe, which adopts a one-step continuous co-extrusion winding integral molding method, including the following steps: S1 Raw Material Pretreatment: Prepare UHMWPE substrate, HDPE substrate, and modified bonding resin, and perform plasma surface activation treatment on the steel wire to remove oil and oxide layer; S2 Inner Layer Co-extrusion Shaping: UHMWPE substrate is extruded into a wear-resistant inner layer of ultra-high molecular weight polyethylene, which is then pre-cooled in a gradient after vacuum sizing and co-extruded online to form the first modified adhesive resin layer. S3 core pressure-bearing skeleton symmetrical winding: winding medium-density left-handed steel wire to obtain medium-density left-handed steel wire main pressure-bearing layer, co-extruding the first bonding isolation composite layer, winding medium-density right-handed steel wire to obtain medium-density right-handed steel wire main pressure-bearing layer, bidirectional reverse winding to offset axial torque, thus obtaining the core pressure-bearing skeleton; S4 Thickened Buffer and Isolation Layer: After the core pressure-bearing skeleton is formed, a thickened buffer and isolation layer is co-extruded to achieve a composite without voids at the entire interface; S5 ring stiffness reinforced skeleton symmetrical winding: low-density right-handed steel wire is wound to obtain a low-density right-handed steel wire auxiliary reinforcement layer, a second bonding isolation composite layer is co-extruded, low-density left-handed steel wire is wound to obtain a low-density left-handed steel wire auxiliary reinforcement layer, and bidirectional reverse winding is used to offset the axial torque to obtain a ring stiffness reinforced skeleton. S6 outer layer coating and shaping: co-extruded second modified adhesive resin layer and high-density polyethylene outer protective layer, which are then shaped by three-stage gradient cooling and synchronous traction; S7 post-processing inspection: cut to length, heat-sealed ends, and then put into storage after hydrostatic pressure, peel strength, and abrasion resistance tests.

[0010] As a further description of the above technical solution: In step S2, the extrusion temperature of the ultra-high molecular weight polyethylene wear-resistant inner layer is 240-265℃, the vacuum sizing negative pressure is -0.06--0.08MPa, and the pre-cooling water temperature is 40-50℃; the extrusion temperature of the modified adhesive resin of the first modified adhesive resin layer is 210-225℃.

[0011] As a further description of the above technical solution: In steps S3 and S5, the winding tension of medium-density left-handed and medium-density right-handed steel wires is 80-120N, and the winding tension of low-density right-handed and low-density left-handed steel wires is 60-90N; the production line speed is controlled at 2-5m / min, and the steel wires are arranged without stacking or skipping.

[0012] As a further description of the above technical solution: In step S6, the three-stage gradient cooling consists of 50°C warm water cooling, 30°C ambient water cooling, and ambient air cooling, with a total cooling length ≥15m; the synchronization error between traction speed and extrusion speed is ≤0.5%.

[0013] As a further description of the above technical solution: The rated working pressure of the finished pipe is 6.4~10.0MPa, the burst pressure is ≥25MPa, the steel-plastic peel strength is ≥220N / cm, and the pipe is free from delamination and leakage.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, a four-layer symmetrical winding skeleton with gradient density is used, and the main bearing layer and the auxiliary reinforcing layer are stressed in layers. This is different from the existing single / double layer uniform steel wire structure, which improves the pressure resistance performance and takes into account the ring stiffness, thus solving the problem that pressure resistance and external pressure resistance cannot be achieved at the same time.

[0015] 2. In this invention, a full-interface layered isolation bonding system is used, in which each layer of steel wire is independently covered with an adhesive layer and an isolation layer, and a thickened buffer layer is set between the main and auxiliary layers, which completely solves the problems of debonding and hollowing of existing multi-layer steel wires and improves the steel-plastic bonding strength.

[0016] 3. In this invention, by combining the UHMWPE wear-resistant inner layer with the HDPE gradient matrix and matching the creep constraint of the steel wire skeleton, the ultimate wear resistance and ultra-high pressure bearing are integrated for the first time, resulting in high wear resistance. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of a steel wire mesh reinforced high molecular weight polyethylene wear-resistant pipe.

[0018] Figure 2This is a flowchart illustrating the manufacturing process of a steel wire mesh reinforced high molecular weight polyethylene wear-resistant pipe.

[0019] Legend: 1. Ultra-high molecular weight polyethylene wear-resistant inner layer; 2. First modified adhesive resin layer; 3. Medium-density left-handed steel wire main bearing layer; 4. First adhesive isolation composite layer; 5. Medium-density right-handed steel wire main bearing layer; 6. Thickened buffer isolation layer; 7. Low-density right-handed steel wire auxiliary reinforcement layer; 8. Second adhesive isolation composite layer; 9. Low-density left-handed steel wire auxiliary reinforcement layer; 10. Second modified adhesive resin layer; 11. High-density polyethylene outer protective layer. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1 This invention provides a technical solution: a steel wire mesh reinforced high molecular weight polyethylene wear-resistant pipe and its preparation process, comprising, from the inside out, the following coaxial composite layers: 1. Ultra-high molecular weight polyethylene wear-resistant inner layer; 2. First modified adhesive resin layer; 3. Medium-density left-handed steel wire main pressure-bearing layer; 4. First adhesive isolation composite layer; 5. Medium-density right-handed steel wire main pressure-bearing layer; 6. Thickened buffer isolation layer; 7. Low-density right-handed steel wire auxiliary reinforcement layer; 8. Second adhesive isolation composite layer; 9. Low-density left-handed steel wire auxiliary reinforcement layer; 10. Second modified adhesive resin layer; and 11. High-density polyethylene outer protective layer. The medium-density left-handed steel wire main bearing layer 3 and the medium-density right-handed steel wire main bearing layer 5 are bidirectional symmetrical winding structures with a steel wire coverage of 70% to 80%, forming the core pressure-bearing skeleton of the pipe; the low-density right-handed steel wire auxiliary reinforcing layer 7 and the low-density left-handed steel wire auxiliary reinforcing layer 9 are bidirectional symmetrical winding structures with a steel wire coverage of 50% to 60%, forming the ring stiffness reinforcing skeleton of the pipe. The first adhesive isolation composite layer 4 and the second adhesive isolation composite layer 8 are both integrally composited from a modified adhesive resin thin layer and a PE functional isolation thin layer; the thickened buffer isolation layer 6 is made of HDPE material and is used to separate the core pressure-bearing skeleton from the ring stiffness reinforcement skeleton to achieve stress layered transmission. The ultra-high molecular weight polyethylene wear-resistant inner layer 1 has a viscosity-average molecular weight of 2.5 million to 3.5 million and a wall thickness of 2.0 to 4.0 mm; the high-density polyethylene outer protective layer 11 is made of PE100 grade material and has a wall thickness of 2.5 to 4.0 mm. All four steel wire layers use high-strength galvanized bead wire with a diameter of 0.8–1.2 mm, a tensile strength ≥2000 MPa, and a winding angle of 54.7°. The modified adhesive resin thin layer is maleic anhydride-grafted PE modified resin, with a single layer thickness of 0.2-0.4 mm; the PE functional isolation thin layer has a thickness of 0.8-1.2 mm, and the thickened buffer isolation layer 6 has a thickness of 1.5-2.0 mm.

[0022] Example 1: S1 Raw Material Pretreatment: Prepare UHMWPE substrate, HDPE substrate, and modified bonding resin, and perform plasma surface activation treatment on the steel wire to remove oil and oxide layer; S2 Inner Layer Co-extrusion: The UHMWPE substrate is extruded into an ultra-high molecular weight polyethylene wear-resistant inner layer, which is then vacuum sizing and gradient pre-cooled before online co-extrusion of the first modified adhesive resin layer. The extrusion temperature of the ultra-high molecular weight polyethylene wear-resistant inner layer is 245℃, the vacuum sizing negative pressure is -0.07MPa, and the pre-cooling water temperature is 45℃. The extrusion temperature of the modified adhesive resin for the first modified adhesive resin layer is 215℃. S3 core pressure-bearing skeleton symmetrical winding: winding medium-density left-handed steel wire to obtain medium-density left-handed steel wire main pressure-bearing layer, co-extruding the first bonding and isolation composite layer, winding medium-density right-handed steel wire to obtain medium-density right-handed steel wire main pressure-bearing layer, bidirectional reverse winding to offset axial torque, to obtain core pressure-bearing skeleton; the winding tension of medium-density left-handed steel wire and medium-density right-handed steel wire is 90N, and the production line speed is 3.5m / min; S4 Thickened Buffer and Isolation Layer: After the core pressure-bearing skeleton is formed, a thickened buffer and isolation layer is co-extruded to achieve a composite without voids at the entire interface; S5 ring stiffness reinforced skeleton symmetrical winding: low-density right-handed steel wire is wound to obtain a low-density right-handed steel wire auxiliary reinforcement layer, a second bonding and isolation composite layer is co-extruded, low-density left-handed steel wire is wound to obtain a low-density left-handed steel wire auxiliary reinforcement layer, and bidirectional reverse winding is used to offset the axial torque to obtain a ring stiffness reinforced skeleton; the winding tension of the low-density right-handed steel wire and the low-density left-handed steel wire is 70N, and the production line speed is 3.5m / min; S6 Outer Layer Coating and Shaping: Co-extruded second modified adhesive resin layer and high-density polyethylene outer protective layer, shaped by three-stage gradient cooling and synchronous traction; Three-stage cooling: 50℃-30℃-room temperature, cooling length 18m, synchronous error 0.3%; S7 post-processing inspection: cut to length, heat-sealed ends, and put into storage after hydrostatic pressure, peel strength, and abrasion resistance tests; rated pressure 6.4MPa, burst pressure 26MPa, peel strength 225N / cm, no delamination or leakage.

[0023] Example 2: S1 Raw Material Pretreatment: Prepare UHMWPE substrate, HDPE substrate, and modified bonding resin, and perform plasma surface activation treatment on the steel wire to remove oil and oxide layer; S2 Inner Layer Co-extrusion: The UHMWPE substrate is extruded into an ultra-high molecular weight polyethylene wear-resistant inner layer, which is then vacuum sizing and gradient pre-cooled before online co-extrusion of the first modified adhesive resin layer. The extrusion temperature of the ultra-high molecular weight polyethylene wear-resistant inner layer is 255℃, the vacuum sizing negative pressure is -0.065MPa, and the pre-cooling water temperature is 42℃. The extrusion temperature of the modified adhesive resin for the first modified adhesive resin layer is 220℃. S3 core pressure-bearing skeleton symmetrical winding: winding medium-density left-handed steel wire to obtain medium-density left-handed steel wire main pressure-bearing layer, co-extruding the first bonding isolation composite layer, winding medium-density right-handed steel wire to obtain medium-density right-handed steel wire main pressure-bearing layer, bidirectional reverse winding to offset axial torque, thus obtaining the core pressure-bearing skeleton; the winding tension of medium-density left-handed steel wire and medium-density right-handed steel wire is 105N, and the production line speed is 3m / min; S4 Thickened Buffer and Isolation Layer: After the core pressure-bearing skeleton is formed, a thickened buffer and isolation layer is co-extruded to achieve a composite without voids at the entire interface; S5 ring stiffness reinforced skeleton symmetrical winding: low-density right-handed steel wire is wound to obtain a low-density right-handed steel wire auxiliary reinforcement layer, co-extrude the second bonding isolation composite layer, low-density left-handed steel wire is wound to obtain a low-density left-handed steel wire auxiliary reinforcement layer, bidirectional reverse winding to offset axial torque, resulting in a ring stiffness reinforced skeleton; the winding tension of the low-density right-handed steel wire and the low-density left-handed steel wire is 80N, and the production line speed is 3m / min; S6 Outer Layer Coating and Shaping: Co-extruded second modified adhesive resin layer and high-density polyethylene outer protective layer, shaped by three-stage gradient cooling and synchronous traction; Three-stage cooling: 50℃-30℃-room temperature, cooling length 20m, synchronous error 0.2%; S7 post-processing inspection: cut to length, heat-sealed ends, and put into storage after hydrostatic pressure, peel strength, and abrasion resistance tests; rated pressure 8.0MPa, burst pressure 28MPa, peel strength 230N / cm, no delamination or leakage.

[0024] Example 3: S1 Raw Material Pretreatment: Prepare UHMWPE substrate, HDPE substrate, and modified bonding resin, and perform plasma surface activation treatment on the steel wire to remove oil and oxide layer; S2 Inner Layer Co-extrusion: The UHMWPE substrate is extruded into an ultra-high molecular weight polyethylene wear-resistant inner layer, which is then vacuum sizing and gradient pre-cooled before online co-extrusion of the first modified adhesive resin layer. The extrusion temperature of the ultra-high molecular weight polyethylene wear-resistant inner layer is 260℃, the vacuum sizing negative pressure is -0.08MPa, and the pre-cooling water temperature is 50℃. The extrusion temperature of the modified adhesive resin for the first modified adhesive resin layer is 225℃. S3 core pressure-bearing skeleton symmetrical winding: winding medium-density left-handed steel wire to obtain medium-density left-handed steel wire main pressure-bearing layer, co-extruding the first bonding isolation composite layer, winding medium-density right-handed steel wire to obtain medium-density right-handed steel wire main pressure-bearing layer, bidirectional reverse winding to offset axial torque, thus obtaining the core pressure-bearing skeleton; the winding tension of medium-density left-handed steel wire and medium-density right-handed steel wire is 120N, and the production line speed is 2m / min; S4 Thickened Buffer and Isolation Layer: After the core pressure-bearing skeleton is formed, a thickened buffer and isolation layer is co-extruded to achieve a composite without voids at the entire interface; S5 ring stiffness reinforced skeleton symmetrical winding: low-density right-handed steel wire is wound to obtain a low-density right-handed steel wire auxiliary reinforcement layer, a second bonding isolation composite layer is co-extruded, low-density left-handed steel wire is wound to obtain a low-density left-handed steel wire auxiliary reinforcement layer, bidirectional reverse winding to offset axial torque, resulting in a ring stiffness reinforced skeleton; the winding tension of the low-density right-handed steel wire and the low-density left-handed steel wire is 90N, and the production line speed is 2m / min; S6 Outer Layer Coating and Shaping: Co-extruded second modified adhesive resin layer and high-density polyethylene outer protective layer, shaped by three-stage gradient cooling and synchronous traction; Three-stage cooling: 50℃-30℃-room temperature, cooling length 22m, synchronous error 0.1%; S7 post-processing inspection: cut to length, heat-sealed ends, and put into storage after hydrostatic pressure, peel strength and wear resistance tests; rated pressure 10MPa, burst pressure 31MPa, peel strength 238N / cm, no delamination or leakage.

[0025] Example 4: S1 Raw Material Pretreatment: Prepare UHMWPE substrate, HDPE substrate, and modified bonding resin, and perform plasma surface activation treatment on the steel wire to remove oil and oxide layer; S2 Inner Layer Co-extrusion: The UHMWPE substrate is extruded into an ultra-high molecular weight polyethylene wear-resistant inner layer, which is then vacuum sizing and gradient pre-cooled before online co-extrusion of the first modified adhesive resin layer. The extrusion temperature of the ultra-high molecular weight polyethylene wear-resistant inner layer is 250℃, the vacuum sizing negative pressure is -0.075MPa, and the pre-cooling water temperature is 48℃. The extrusion temperature of the modified adhesive resin for the first modified adhesive resin layer is 218℃. S3 core pressure-bearing skeleton symmetrical winding: winding medium-density left-handed steel wire to obtain medium-density left-handed steel wire main pressure-bearing layer, co-extruding the first bonding and isolation composite layer, winding medium-density right-handed steel wire to obtain medium-density right-handed steel wire main pressure-bearing layer, bidirectional reverse winding to offset axial torque, to obtain core pressure-bearing skeleton; the winding tension of medium-density left-handed steel wire and medium-density right-handed steel wire is 95N, and the production line speed is 2.5m / min; S4 Thickened Buffer and Isolation Layer: After the core pressure-bearing skeleton is formed, a thickened buffer and isolation layer is co-extruded to achieve a composite without voids at the entire interface; S5 ring stiffness reinforced skeleton symmetrical winding: low-density right-handed steel wire is wound to obtain a low-density right-handed steel wire auxiliary reinforcement layer, a second bonding and isolation composite layer is co-extruded, low-density left-handed steel wire is wound to obtain a low-density left-handed steel wire auxiliary reinforcement layer, and bidirectional reverse winding is used to offset the axial torque to obtain a ring stiffness reinforced skeleton; the winding tension of the low-density right-handed steel wire and the low-density left-handed steel wire is 75N, and the production line speed is 2.5m / min; S6 Outer Layer Coating and Shaping: Co-extruded second modified adhesive resin layer and high-density polyethylene outer protective layer, shaped by three-stage gradient cooling and synchronous traction; Three-stage cooling: 50℃-30℃-room temperature, cooling length 20m, synchronous error 0.3%; S7 post-processing inspection: cut to length, heat-sealed ends, and put into storage after hydrostatic pressure, peel strength, and abrasion resistance tests; rated pressure 7.0MPa, burst pressure 27MPa, peel strength 228N / cm, no delamination or leakage.

[0026] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A steel wire mesh reinforced high molecular weight polyethylene wear-resistant pipe, characterized in that: The structure consists of the following layers arranged coaxially from the inside out: an ultra-high molecular weight polyethylene wear-resistant inner layer (1), a first modified adhesive resin layer (2), a medium-density left-handed steel wire main bearing layer (3), a first adhesive isolation composite layer (4), a medium-density right-handed steel wire main bearing layer (5), a thickened buffer isolation layer (6), a low-density right-handed steel wire auxiliary reinforcement layer (7), a second adhesive isolation composite layer (8), a low-density left-handed steel wire auxiliary reinforcement layer (9), a second modified adhesive resin layer (10), and a high-density polyethylene outer protective layer (11). The medium-density left-handed steel wire main bearing layer (3) and the medium-density right-handed steel wire main bearing layer (5) are bidirectional symmetrical winding structures with a steel wire coverage of 70% to 80%, forming the core pressure-bearing skeleton of the pipe; the low-density right-handed steel wire auxiliary reinforcement layer (7) and the low-density left-handed steel wire auxiliary reinforcement layer (9) are bidirectional symmetrical winding structures with a steel wire coverage of 50% to 60%, forming the ring stiffness reinforcement skeleton of the pipe; The first adhesive isolation composite layer (4) and the second adhesive isolation composite layer (8) are both integrally composed of a modified adhesive resin thin layer and a PE functional isolation thin layer; the thickened buffer isolation layer (6) is made of HDPE material and is used to separate the core pressure-bearing skeleton from the ring stiffness reinforcement skeleton to achieve stress layered transmission.

2. The steel wire mesh reinforced high molecular weight polyethylene wear-resistant pipe according to claim 1, characterized in that, The ultra-high molecular weight polyethylene wear-resistant inner layer (1) has a viscosity-average molecular weight of 2.5 million to 3.5 million and a wall thickness of 2.0 to 4.0 mm; the high-density polyethylene outer protective layer (11) is made of PE100 grade material and has a wall thickness of 2.5 to 4.0 mm.

3. The steel wire mesh reinforced high molecular weight polyethylene wear-resistant pipe according to claim 1, characterized in that, All four steel wire layers use high-strength galvanized bead wire with a diameter of 0.8–1.2 mm, a tensile strength ≥2000 MPa, and a winding angle of 54.7°.

4. The steel wire mesh reinforced high molecular weight polyethylene wear-resistant pipe according to claim 1, characterized in that, The modified adhesive resin thin layer is maleic anhydride-grafted PE modified resin with a single layer thickness of 0.2-0.4 mm; the PE functional isolation thin layer has a thickness of 0.8-1.2 mm, and the thickened buffer isolation layer (6) has a thickness of 1.5-2.0 mm.

5. A process for preparing a steel wire mesh reinforced high molecular weight polyethylene wear-resistant pipe as described in any one of claims 1-4, characterized in that, The one-step continuous co-extrusion winding molding process includes the following steps: S1 Raw Material Pretreatment: Prepare UHMWPE substrate, HDPE substrate, and modified bonding resin, and perform plasma surface activation treatment on the steel wire to remove oil and oxide layer; S2 Inner Layer Co-extrusion Shaping: UHMWPE substrate is extruded into a wear-resistant inner layer of ultra-high molecular weight polyethylene, which is then pre-cooled in a gradient after vacuum sizing and co-extruded online to form the first modified adhesive resin layer. S3 core pressure-bearing skeleton symmetrical winding: winding medium-density left-handed steel wire to obtain medium-density left-handed steel wire main pressure-bearing layer, co-extruding the first bonding isolation composite layer, winding medium-density right-handed steel wire to obtain medium-density right-handed steel wire main pressure-bearing layer, bidirectional reverse winding to offset axial torque, thus obtaining the core pressure-bearing skeleton; S4 Thickened Buffer and Isolation Layer: After the core pressure-bearing skeleton is formed, a thickened buffer and isolation layer is co-extruded to achieve a composite without voids at the entire interface; S5 ring stiffness reinforced skeleton symmetrical winding: low-density right-handed steel wire is wound to obtain a low-density right-handed steel wire auxiliary reinforcement layer, a second bonding isolation composite layer is co-extruded, low-density left-handed steel wire is wound to obtain a low-density left-handed steel wire auxiliary reinforcement layer, and bidirectional reverse winding is used to offset the axial torque to obtain a ring stiffness reinforced skeleton. S6 outer layer coating and shaping: co-extruded second modified adhesive resin layer and high-density polyethylene outer protective layer, which are then shaped by three-stage gradient cooling and synchronous traction; S7 post-processing inspection: cut to length, heat-sealed ends, and then put into storage after hydrostatic pressure, peel strength, and abrasion resistance tests.

6. The preparation process of a steel wire mesh reinforced high molecular weight polyethylene wear-resistant pipe according to claim 5, characterized in that, In step S2, the extrusion temperature of the ultra-high molecular weight polyethylene wear-resistant inner layer is 240-265℃, the vacuum sizing negative pressure is -0.06--0.08MPa, and the pre-cooling water temperature is 40-50℃; the extrusion temperature of the modified adhesive resin of the first modified adhesive resin layer is 210-225℃.

7. The preparation process of a steel wire mesh reinforced high molecular weight polyethylene wear-resistant pipe according to claim 5, characterized in that, In steps S3 and S5, the winding tension of medium-density left-handed and medium-density right-handed steel wires is 80-120N, and the winding tension of low-density right-handed and low-density left-handed steel wires is 60-90N; the production line speed is controlled at 2-5m / min, and the steel wires are arranged without stacking or skipping.

8. The preparation process of a steel wire mesh reinforced high molecular weight polyethylene wear-resistant pipe according to claim 5, characterized in that, In step S6, the three-stage gradient cooling consists of 50°C warm water cooling, 30°C ambient water cooling, and ambient air cooling, with a total cooling length ≥15m; the synchronization error between traction speed and extrusion speed is ≤0.5%.

9. The steel wire mesh reinforced high molecular weight polyethylene wear-resistant pipe and its preparation process according to claim 5, characterized in that, The rated working pressure of the finished pipe is 6.4~10.0MPa, the burst pressure is ≥25MPa, the steel-plastic peel strength is ≥220N / cm, and the pipe is free from delamination and leakage.

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