Reinforced plastic composite pipe with spiral crossed steel wire mesh welding framework

Abstract

The invention discloses a spiral crossed steel wire mesh welded skeleton reinforced plastic composite pipe, and relates to the field of steel-plastic composite pipes, the spiral crossed steel wire mesh welded skeleton reinforced plastic composite pipe comprises a pipe body with thermoplastic plastic as a matrix, and an internal reinforced phase is arranged between the inner wall and the outer wall of the pipe body; the internal reinforcing phase is formed by spirally and crossly winding and welding multiple layers of steel wires, and the number of the layers of the steel wires is at least two. Through the design of the spiral crossed steel wire mesh, stress is uniformly distributed on the pipe in different directions, higher tensile strength and compressive strength are provided, external load and internal pressure can be effectively resisted, the bearing capacity of the pipe is improved, and the service life of the pipe is prolonged; the spiral angle and the steel wire layer number of the spiral crossed steel wire can be adjusted according to specific application requirements so as to meet different pressure bearing capacities and use environments; and on the premise of keeping the same strength, fewer materials are used, so that the overall weight of the pipe is reduced, the production cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of steel-plastic composite pipes, and in particular to a spiral cross wire mesh welded skeleton reinforced plastic composite pipe. Background Art

[0002] With the industry's recognition of steel-plastic composite pipes, higher requirements have been placed on the diameter and pressure of the pipes. The strength of the built-in skeleton of the pipe plays a decisive role in improving the pressure level of the pipe.

[0003] A Chinese patent with authorization announcement number CN211853060U discloses a multi-layer skeleton reinforced plastic composite pipe, including a tube body formed by an extrusion process, at least two layers of reinforcing skeletons are fixed between the inner wall and the outer wall of the tube body by an extrusion process, the at least two layers of reinforcing skeletons include at least one of reinforcing skeleton A or reinforcing skeleton B, the reinforcing skeleton A includes a plurality of warps arranged along the circumference of the tube body, each of the warps extends along the axial direction of the tube body, the plurality of warps are spirally wound along the axial direction of the tube body by wefts and welded and fixed, and the warps and wefts are both steel wires, and the reinforcing skeleton B is a continuous integrated grid structure.

[0004] The above-mentioned patent publication fixes at least two layers of reinforcement skeletons between the inner wall and the outer wall of the pipe body through the extrusion process, so that the relatively small pipe wall thickness can meet the pressure use requirements of the pipe. Although it can improve the strength of the pipe to a certain extent, due to the relatively fixed arrangement of the warp and weft, the pipe has stress concentration when it is subjected to external loads and internal pressure. This stress concentration may cause fatigue damage to the pipe during long-term use, affecting its service life and safety. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a plastic composite pipe which can evenly distribute stress in different directions.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: A spiral cross wire mesh welded skeleton reinforced plastic composite pipe comprises a pipe body with thermoplastic plastic as the matrix, wherein the inner wall and the outer wall of the pipe body are provided with an internal reinforcement phase; the internal reinforcement phase is formed by multiple layers of spiral cross wires wound and welded, and the number of steel wire layers is at least two.

[0007] Further preferably, the rotation directions of the steel wires in two adjacent layers are opposite.

[0008] Further preferably, the spiral angle of the steel wire can be adjusted according to welding requirements and actual application scenarios of the pipe.

[0009] Further preferably, as the axial strength of the pipe increases, the helix angle of the steel wire increases accordingly.

[0010] Further preferably, the diameters of the two contacting layers of steel wires may be the same or different, and the cross-sectional shape of the steel wires may be circular, rectangular or other shapes that meet the requirements.

[0011] Further preferably, the multiple layers of spirally wound steel wires are welded at intersections.

[0012] Further preferably, a plastic seal is provided on the end face of the tube body, and the plastic seal is fixedly connected to the end face of the tube body by welding or bonding; the plastic seal is made of the same material as the tube body or other plastic material that can be mutually soluble and bonded with the tube body material.

[0013] Further preferably, the inner wall and the outer wall of the tube body are both formed of thermoplastic plastic.

[0014] Further preferably, the gaps in the steel mesh skeleton are filled with thermoplastic plastic.

[0015] The beneficial effects of adopting the above technical solution are: The design of the spiral cross wire mesh of the present invention allows the pipe to evenly distribute stress in different directions, providing higher tensile strength and compressive strength, being able to effectively resist external loads and internal pressure, improving the bearing capacity of the pipe, and extending the service life of the pipe; The spiral angle and number of layers of the spiral cross wires of the present invention can be adjusted according to specific application requirements to meet different pressure bearing capacities and use environments; less material is used while maintaining the same strength, thereby reducing the overall weight of the pipe, reducing production costs, and improving production efficiency; The adjacent spirally crossed steel wires of the present invention are fixed by welding at each contact point, which provides higher mechanical strength and better impact resistance, and more effectively disperses the load and pressure, thereby improving the compression and torsional resistance of the pipeline, and greatly reducing the wall thickness of the pipe; during the extrusion molding process of the pipe body, the plastic passes through the steel mesh skeleton reinforcement structure, and the two form a stable interpenetrating structure, which improves the connection strength between the steel mesh skeleton reinforcement structure and the pipe body itself, and greatly reduces the probability of delamination; by arranging a plastic seal on the end face of the pipe body, it is ensured that the end face of the pipe has consistent corrosion resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of the spiral cross-welded steel wire mesh of the present invention; Figure 2 It is a cross-sectional view of an embodiment of the present invention.

[0017] In the figure: 1-tube body; 2-steel wire. DETAILED DESCRIPTION

[0018] The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0019] See attached Figure 1-2 As shown, a spiral cross wire mesh welded skeleton reinforced plastic composite pipe includes a pipe body 1 with thermoplastic plastic as the matrix, and an internal reinforcement phase between the inner wall and the outer wall of the pipe body 1; the internal reinforcement phase is composed of multiple layers of steel wires 2 spirally wound and welded, the number of steel wires 2 is at least two layers, and the rotation directions of the adjacent two layers of steel wires 2 are opposite. The design of the spiral cross wire mesh allows the pipe to evenly distribute stress in different directions. The intersections of the multiple layers of spirally wound steel wires 2 all need to be welded, and the welding between the adjacent two layers of steel wires 2 can be resistance welding, laser welding or other welding technology that meets the requirements, providing higher mechanical strength and better impact resistance, more effectively dispersing loads and pressure, thereby improving the compression and torsion resistance of the pipeline, and greatly reducing the wall thickness of the pipe. The wire diameters of the two layers of steel wires 2 in contact can be the same or different, and the cross-sectional shape of the steel wires 2 is circular, rectangular or other shapes that meet the requirements.

[0020] The angle of the spiral winding and crossing of adjacent steel wire layers is adjusted according to the needs of welding and the actual application scenarios of the pipe. As the axial strength of the pipe increases, the spiral angle of steel wire 2 increases accordingly. The greater the density of steel wire 2 winding, the higher the tensile strength and compressive strength can be provided. According to market demand, plastic composite pipes with different spiral winding and crossing angles are customized to meet different pressure bearing capacities and use environments; less material is used while maintaining the same strength, thereby reducing the overall weight of the pipe, reducing production costs, and improving production efficiency.

[0021] The inner wall and outer wall of the pipe body 1 are both made of thermoplastic plastics. Since the inner wall and outer wall of the pipe body are made of thermoplastic plastics, the inner plastic layer is smooth and has low resistance, which minimizes the loss along the pipe body 1, and the pipe body 1 as a whole has the advantages of corrosion resistance, wear resistance, and no scaling. In this embodiment, the steel mesh skeleton has gaps, and during the extrusion molding process of the pipe body 1, the thermoplastic plastic and the steel mesh skeleton interpenetrate each other to obtain a stable pipe structure.

[0022] As a preferred embodiment, a plastic seal is provided on the end face of the pipe body 1, and the plastic seal is fixedly connected to the end face of the pipe body 1 by welding or bonding. The plastic seal is made of the same material as the pipe body 1 or other plastic materials that can be mutually soluble and bonded with the material of the pipe body 1, ensuring that the end face of the pipe has consistent corrosion resistance.

[0023] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A spiral cross wire mesh welded skeleton reinforced plastic composite pipe, comprising a pipe body (1) with a thermoplastic plastic as a matrix, characterized in that: An internal reinforcement phase is located between the inner wall and the outer wall of the tube body (1); the internal reinforcement phase is formed by multiple layers of steel wires (2) that are spirally cross-wound and welded, and the number of layers of the steel wires (2) is at least two.

2. The spiral cross wire mesh welded skeleton reinforced plastic composite pipe according to claim 1, characterized in that: The rotation directions of two adjacent layers of steel wires (2) are opposite.

3. The spiral cross wire mesh welded skeleton reinforced plastic composite pipe according to claim 1, characterized in that: The spiral angle of the steel wire (2) can be adjusted according to welding requirements and actual application scenarios of the pipe.

4. The spiral cross wire mesh welded skeleton reinforced plastic composite pipe according to claim 3, characterized in that: As the axial strength of the pipe increases, the helix angle of the steel wire (2) increases accordingly.

5. The spiral cross wire mesh welded skeleton reinforced plastic composite pipe according to claim 1, characterized in that: The wire diameters of the two contacting layers of steel wires (2) may be the same or different, and the cross-sectional shape of the steel wires (2) may be circular, rectangular or other shapes that meet requirements.

6. The spiral cross wire mesh welded skeleton reinforced plastic composite pipe according to claim 1, characterized in that: The multiple layers of spirally wound steel wires (2) are welded at intersections.

7. The spiral cross wire mesh welded skeleton reinforced plastic composite pipe according to claim 1, characterized in that: A plastic seal is provided on the end face of the tube body (1), and the plastic seal is fixedly connected to the end face of the tube body (1) by welding or bonding; the plastic seal is made of the same material as the tube body (1) or other plastic material that can be mutually soluble and mutually adherent with the material of the tube body (1).

8. The spiral cross wire mesh welded skeleton reinforced plastic composite pipe according to claim 1, characterized in that: The inner wall and the outer wall of the tube body (1) are both formed of thermoplastic plastic.

9. The spiral cross wire mesh welded skeleton reinforced plastic composite pipe according to claim 1, characterized in that: The gaps between the steel mesh skeleton are filled with thermoplastic.

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