Multi-layer welding integrated steel mesh framework reinforced plastic composite pipe

Abstract

The utility model discloses a multi-layer welding integrated steel mesh framework reinforced plastic composite pipe, which relates to the field of steel-plastic composite pipes, is formed by an extrusion molding process, and comprises a pipe body and an internal reinforced phase positioned between the inner wall and the outer wall of the pipe body, the internal reinforcement phase comprises a warp layer and a weft layer, the warp layer is a steel wire arranged in the axial direction of the pipe body, and the weft layer is a steel wire spirally wound in the circumferential direction of the pipe body; the weft steel wires are welded and fixed at contact points of the weft steel wires and the warp steel wires in the spiral winding process, and the weft steel wires and the warp steel wires form an integrated steel mesh framework reinforced structure. According to the steel mesh reinforced pipe, multiple layers of steel meshes form an integrated steel mesh framework reinforced structure through step-by-step or synchronous welding, the overall rigidity of the pipe is multiplied, meanwhile, after steel-plastic compounding, the overall stability of the pipe is better, and higher mechanical strength and better impact resistance are provided.

Description

Technical Field

[0001] The utility model relates to the field of steel-plastic composite pipes, in particular to a multi-layer welded integrated steel mesh 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 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 a relatively small pipe wall thickness can be obtained to meet the pressure use requirements of the pipe, but the two adjacent layers of reinforced steel mesh skeletons are not in contact and welded, and there is a pure plastic layer between the two, which to a certain extent reduces the integrity of the steel mesh and the stability of the product structure, and at the same time puts higher requirements on the steel-plastic composite molding mold and process. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a multi-layer welded integrated steel mesh skeleton reinforced plastic composite pipe which can reduce the wall thickness of the composite pipe and improve the pressure bearing capacity of the pipe.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A multi-layer welded integrated steel mesh skeleton reinforced plastic composite pipe, which is formed by an extrusion process, and its key technology is: it includes a pipe body, an internal reinforcement phase located between the inner wall and the outer wall of the pipe body; the internal reinforcement phase includes a warp layer and a weft layer, the warp layer is a steel wire arranged along the axial direction of the pipe body, and the weft layer is a steel wire spirally wound along the circumferential direction of the pipe body; the weft steel wire is welded and fixed at the contact point with the warp steel wire during the spiral winding process, and the weft steel wire and the warp steel wire form an integrated steel mesh skeleton reinforcement structure.

[0008] Further preferably, at least two weft layers are provided, and at least two warp layers are provided. The weft layer or the warp layer may be provided adjacent to the inner wall of the tube body. The weft layers and the warp layers are alternately provided, and adjacent weft layers and warp layers form a group of steel mesh skeleton reinforcement structure.

[0009] Further preferably, each layer of warp threads is composed of multiple warp thread steel wires extending along an axial straight line, the multiple warp threads are evenly distributed on the circumference, and the number of warp threads in each layer can be the same or different; each layer of weft threads is composed of a single or multiple steel wires spirally wound around the warp thread steel wires and welded and fixed.

[0010] Further preferably, the pitch of the weft steel wire is ≥1 mm.

[0011] Further preferably, the cross-sectional shapes of the weft steel wires and the warp steel wires are circular, rectangular or other shapes that meet the requirements.

[0012] Further preferably, the welding of the contact points between the weft steel wires and the warp steel wires is performed by resistance welding, laser welding or other welding methods that meet the requirements.

[0013] Further preferably, a plastic seal is provided on the end surface of the tube body, and the plastic seal is fixedly connected to the end surface of the tube body by welding or bonding.

[0014] Further preferably, the inner wall and the outer wall of the tube body are both made of thermoplastic plastic.

[0015] Further preferably, the gaps in the steel mesh skeleton reinforcement structure are filled with thermoplastic plastic.

[0016] Compared with the prior art, the technical progress achieved by the utility model is:

[0017] 1. Compared with the prior art, the two adjacent layers of steel mesh skeleton reinforcement structure of the utility model are contacted and welded, and there is no pure plastic layer between the two, which can reduce the wall thickness of the composite pipe, and the multi-layer integrated steel mesh skeleton can be welded step by step or synchronously, so that the multi-layer steel mesh becomes a complete whole, realizing the exponential increase of the overall rigidity of the pipe. At the same time, after the steel-plastic composite, the overall stability of the pipe is better.

[0018] 2. The utility model is provided with multiple layers of weft wires and multiple layers of warp wires. The warp wires are steel wires arranged along the axial direction of the pipe body, and the weft wires are steel wires spirally wound along the circumferential direction of the pipe body. The weft wires are welded and fixed at the contact points with the warp wires during the spiral winding process. The weft wires and the warp wires form an integrated steel mesh skeleton reinforcement structure, which can provide higher mechanical strength and better impact resistance. The multi-layer steel mesh structure can more effectively disperse the load and pressure, thereby improving the compression and torsion resistance of the pipeline, and greatly reducing the wall thickness of the pipe. The alternating arrangement of the warp wires and the weft wires can make the second layer of the warp wires play an effective supporting role for the second layer of the weft wires, making the overall structure more stable. 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 setting 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

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0020] In the attached picture:

[0021] Figure 1 It is a schematic diagram of the annular cross section of the utility model;

[0022] Figure 2 for Figure 1 A magnified image of the middle part;

[0023] Figure 3 This is a cross-sectional view of the utility model;

[0024] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0025] In the figure:

[0026] 1-tube body; 11-inner plastic layer; 12-gap plastic; 13-outer plastic layer; 2-steel mesh skeleton reinforcement structure; 21-warp layer; 22-weft layer. DETAILED DESCRIPTION

[0027] 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 following will describe the embodiments of the present utility model in conjunction with the accompanying drawings.

[0028] like Figure 1-4As shown, a multi-layer welded one-piece steel mesh skeleton reinforced plastic composite pipe is formed by an extrusion process, including a pipe body 1 and an internal reinforcement phase located between the inner wall and the outer wall of the pipe body 1; the internal reinforcement phase includes a warp layer 21 and a weft layer 22, the warp layer 21 is a steel wire arranged along the axial direction of the pipe body, and the weft layer 22 is a steel wire spirally wound along the circumferential direction of the pipe body; the weft steel wire is welded and fixed at the contact point with the warp steel wire during the spiral winding process, and the weft steel wire and the warp steel wire form an integrated steel mesh skeleton reinforcement structure 2.

[0029] The steel mesh skeleton reinforcement structure 2 of the utility model is welded separately and extruded into a tube at the same time. Through step-by-step or synchronous welding, the multi-layer steel mesh forms an integrated steel mesh skeleton reinforcement structure, which realizes the exponential increase of the overall rigidity of the pipe. At the same time, after the steel-plastic composite, the overall stability of the pipe is better, providing higher mechanical strength and better impact resistance; the multi-layer steel mesh skeleton reinforcement structure 2 can more effectively disperse the load and pressure, thereby improving the compression and torsion resistance of the pipeline, and greatly reducing the wall thickness of the pipe; during the extrusion molding process, the plastic passes through the gap of the steel mesh skeleton reinforcement structure 2, and the two form a stable interpenetrating structure, which improves the connection strength between the steel mesh skeleton reinforcement structure 2 and the pipe body 1 itself, and greatly reduces the probability of delamination. In summary, the utility model has the characteristics of improving the pressure bearing capacity, impact resistance, compression resistance and torsion resistance of the pipe, and the relatively small pipe wall thickness obtains a pipe that meets the pressure use requirements, while retaining the excellent characteristics of plastic pipes.

[0030] As a preferred embodiment of the utility model, the number of layers of weft steel wires and warp steel wires is at least two, and the two-layer steel mesh skeleton reinforcement structure 2 is a layer of warp + a layer of weft + a layer of warp + a layer of weft arranged alternately, and multiple groups and multiple layers can be set as needed, which can effectively prevent the second layer of weft steel wires from falling into the spiral seam of the first layer of weft steel wires during the spiral winding process, that is, the second layer of warp steel wires plays an effective supporting role on the second layer of weft steel wires, making the overall structure more stable.

[0031] As a preferred embodiment of the utility model, the innermost layer of the steel mesh skeleton reinforcement structure 2 is not specified as weft steel wires or warp steel wires. The innermost layer of the steel mesh skeleton reinforcement structure 2 can be weft steel wires or warp steel wires, but the warp layer 21 and the weft layer 22 need to be arranged alternately.

[0032] As a preferred embodiment of the utility model, the inner wall and the outer wall of the pipe body 1 are both made of thermoplastic plastics, namely, the inner plastic layer 11 and the outer plastic layer 13. Since the inner wall and the outer wall of the pipe body are made of thermoplastic plastics, the inner plastic layer 11 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 reinforcement structure 2 has a gap, and during the extrusion molding process of the pipe body 1, the thermoplastic plastic and the steel mesh skeleton reinforcement structure 2 interpenetrate each other to obtain a stable pipe structure.

[0033] As a preferred embodiment of the utility model, each layer of warp wires is composed of multiple wires extending in an axial straight line, and the multiple warp wires are evenly distributed on the circumference. The number of warp wires in each layer can be the same or different; each layer of weft wires is obtained by spirally winding a single or multiple weft wires on the warp wires and welding them. The pitch of each layer of weft wires can be the same or different, and the pitch of the weft wires is ≥1mm.

[0034] As a preferred embodiment of the present invention, the cross-sectional shapes of the weft steel wires and the warp steel wires are circular, rectangular or other shapes that meet the requirements.

[0035] As a preferred embodiment of the utility model, each contact point is fixed by a welding process, which can be resistance welding, laser welding or other welding methods that meet the requirements. Since the weft steel wires and the warp steel wires are welded and fixed at each contact point, the steel mesh skeleton reinforcement structure 2 becomes a whole, and at the same time ensures that the steel mesh skeleton reinforcement structure 2 will not be offset or deformed inside the tube body when the tube body is extruded.

[0036] As a preferred embodiment of the utility model, 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 dissolved and bonded with the material of the pipe body 1, ensuring that the end face of the pipe has consistent corrosion resistance.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is 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 utility model shall be included in the scope of protection of the claims of the utility model.

Claims

1. A multi-layer welded integrated steel mesh skeleton reinforced plastic composite pipe, which is formed by an extrusion process, characterized in that: The invention comprises a tube body (1), and an internal reinforcement phase located between the inner wall and the outer wall of the tube body (1); the internal reinforcement phase comprises a warp layer (21) and a weft layer (22); the warp layer (21) is a steel wire arranged along the axial direction of the tube body, and the weft layer (22) is a steel wire spirally wound along the circumferential direction of the tube body; the weft steel wire is welded and fixed at the contact point with the warp steel wire during the spiral winding process, and the weft steel wire and the warp steel wire form an integrated steel mesh skeleton reinforcement structure (2).

2. The multi-layer welded integrated steel mesh skeleton reinforced plastic composite pipe according to claim 1, characterized in that: At least two layers of the weft layer (22) are provided, and at least two layers of the warp layer (21) are provided. The weft layer (22) or the warp layer (21) may be provided adjacent to the inner wall of the tube body. The weft layer (22) and the warp layer (21) are alternately provided, and adjacent weft layers (22) and warp layers (21) form a group of steel mesh skeleton reinforcement structures (2).

3. The multi-layer welded integrated steel mesh skeleton reinforced plastic composite pipe according to claim 1 or 2, characterized in that: Each layer of warp threads is composed of multiple warp thread steel wires extending in an axial straight line. The multiple warp threads are evenly distributed on the circumference, and the number of warp threads in each layer can be the same or different; each layer of weft threads is composed of a single or multiple steel wires spirally wound around the warp thread steel wires and welded and fixed.

4. The multi-layer welded integrated steel mesh skeleton reinforced plastic composite pipe according to claim 1, characterized in that: The pitch of the weft steel wire is ≥1mm.

5. The multi-layer welded integrated steel mesh skeleton reinforced plastic composite pipe according to claim 1, characterized in that: The cross-sectional shapes of the weft steel wires and the warp steel wires are circular, rectangular or other shapes that meet requirements.

6. The multi-layer welded integrated steel mesh skeleton reinforced plastic composite pipe according to claim 1, characterized in that: The welding of the contact points between the weft steel wires and the warp steel wires is carried out by resistance welding, laser welding or other welding methods that meet the requirements.

7. The multi-layer welded integrated steel mesh 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 multi-layer welded integrated steel mesh 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 made of thermoplastic plastic.

9. The multi-layer welded integrated steel mesh skeleton reinforced plastic composite pipe according to claim 1, characterized in that: The gaps in the steel mesh skeleton reinforcement structure (2) are filled with thermoplastic plastic.

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