Welded steel mesh framework reinforced plastic composite pipe

Abstract

The utility model discloses a reinforced plastic composite pipe with a welded steel mesh framework, 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 composed of a plurality of steel wires which are uniformly arranged along the axial circumference of the pipe body, and the weft layer is composed of circular weft steel wires which are continuously arranged along the circumferential direction of the pipe body; the internal reinforcement phase is a steel mesh framework formed by welding a plurality of warp steel wires and circular ring weft steel wires at contact points, and the number of the warp layers and the number of the weft layers are one or more. The internal reinforcement phase is a steel mesh framework formed by welding a plurality of warp steel wires and annular weft steel wires at contact points, and the distances between adjacent annular weft steel wires are consistent, so that the stress around the whole pipe body can be uniformly distributed, and the uniform distribution of the stress is beneficial to improving the overall strength and pressure resistance of the pipe body; and the damage risk caused by stress concentration is reduced.

Description

Technical Field

[0001] The utility model relates to the field of steel-plastic composite pipes, and particularly relates to a welded steel mesh framework reinforced plastic composite pipe. Background Art

[0002] With the industry's recognition of steel-plastic composite pipes, higher requirements are put forward for the caliber and pressure of the pipes. The strength of the framework inside the pipes plays a decisive role in improving the pressure rating of the pipes.

[0003] Chinese Patent with the authorization announcement number CN211853060U discloses a multi-layer framework reinforced plastic composite pipe, which includes a pipe body formed by an extrusion process. At least two layers of reinforcing frameworks are fixed between the inner wall and the outer wall of the pipe body by an extrusion process. The at least two layers of reinforcing frameworks include at least one of reinforcing framework A or reinforcing framework B. The reinforcing framework A includes multiple warp wires arranged circumferentially along the pipe body, and each of the warp wires extends axially along the pipe body. The multiple warp wires are spirally wound and welded and fixed along the axial direction of the pipe body by weft wires, and both the warp wires and the weft wires are steel wires. The reinforcing framework B is a continuous integral grid structure.

[0004] In the above-mentioned disclosed patent, multiple warp wire steel wires in the reinforcing framework A are spirally wound and welded and fixed along the axial direction of the pipe body by weft wire steel wires. The spirally wound weft wire steel wires may cause uneven stress distribution, which to a certain extent reduces the overall strength and pressure resistance of the pipe body and increases the risk of breakage caused by stress concentration. Content of the Utility Model

[0005] In order to solve the above problems, the utility model provides a welded steel mesh framework reinforced plastic composite pipe that can evenly distribute stress around the entire pipe body.

[0006] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0007] A welded steel mesh framework reinforced plastic composite pipe is formed by an extrusion process. The key technology lies in: it includes a pipe body and an internal reinforcing phase located between the inner wall and the outer wall of the pipe body; the internal reinforcing phase includes a warp wire layer and a weft wire layer. The warp wire layer is multiple steel wires arranged axially along the pipe body and evenly distributed on its circumference. The weft wire layer is a circular weft wire steel wire continuously arranged circumferentially along the pipe body. The internal reinforcing phase is composed of multiple warp wire steel wires and circular weft wire steel wires welded at the contact points to form a steel mesh framework, and the number of layers of both the warp wire layer and the weft wire layer is set to at least one layer.

[0008] Further preferably, the distance between adjacent circular weft wire steel wires in the same weft wire layer is the same.

[0009] Further preferably, the layer adjacent to the inner wall of the pipe can be a weft layer or a warp layer. On both sides of the warp layer, a single-layer weft layer or a multi-layer weft layer is acceptable. The warp layer and the weft layer are welded to form a reinforced steel mesh framework.

[0010] Further preferably, both the inner wall and the outer wall of the pipe are made of thermoplastic plastics.

[0011] Further preferably, the gap of the steel mesh framework reinforcement structure is filled with thermoplastic plastics.

[0012] Further preferably, the cross-sectional shapes of the circular weft wires and the warp wires are circular, rectangular or other shapes that meet the requirements.

[0013] Further preferably, the welding at the contact points between the circular weft wires and the warp wires is resistance welding, laser welding or other welding methods that meet the requirements.

[0014] Compared with the prior art, the technical progress achieved by the present utility model is as follows:

[0015] 1. Compared with the prior art, the internal reinforcement phase of the present utility model is composed of multiple warp wires and circular weft wires welded at the contact points to form a steel mesh framework. The distances between adjacent circular weft wires are consistent, which can make the stress distribution around the entire pipe uniform. The uniform stress distribution helps to improve the overall strength and pressure resistance of the pipe and reduce the risk of breakage caused by stress concentration.

[0016] 2. The number of layers of the warp layer and the weft layer of the present utility model is 1 layer or multiple layers. The layer adjacent to the inner wall of the pipe can be a weft layer or a warp layer. On both sides of the warp layer, a single-layer weft layer or a multi-layer weft layer is acceptable. Adjacent weft layers and warp layers form a set of steel mesh frameworks, 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 compressive and anti-twisting properties of the pipeline, and at the same time greatly reducing the wall thickness of the pipe material. During the extrusion molding process of the pipe body, the plastic passes through the steel mesh framework, and the two form a stable interpenetrating structure, which improves the connection strength between the steel mesh framework and the pipe body itself and greatly reduces the probability of delamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, but do not constitute a limitation to the present utility model.

[0018] In the drawings:

[0019] Figure 1 is a schematic diagram of the annular cross-section of a welded steel mesh framework reinforced plastic composite pipe of one kind of the present utility model;

[0020] Figure 2For Figure 1 Enlarged view of part A in

[0021] Figure 3 Schematic diagram of the annular cross-section of another welded steel mesh framework reinforced plastic composite pipe of the present utility model;

[0022] Figure 4 For Figure 3 Enlarged view of part B in

[0023] In the figure:

[0024] 1 - Pipe body; 11 - Inner plastic layer; 12 - Outer plastic layer; 2 - Warp layer; 3 - Weft layer. Specific embodiments

[0025] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present utility model will be described below with reference to the drawings.

[0026] As Figures 1-4 shown, a welded steel mesh framework reinforced plastic composite pipe is formed by an extrusion process and includes 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 2 and a weft layer 3. The warp layer 2 is a plurality of steel wires evenly arranged in a circumferential direction along the axial direction of the pipe body, and the weft layer 3 is a circular weft steel wire continuously arranged along the circumferential direction of the pipe body; the internal reinforcement phase is composed of a plurality of warp steel wires and circular weft steel wires welded at the contact points to form a steel mesh framework, and the number of layers of the warp layer 2 and the weft layer 3 is 1 layer or multiple layers.

[0027] The internal reinforcement phase of the present utility model is composed of a plurality of warp steel wires and circular weft steel wires welded at the contact points to form a steel mesh framework. The distance between adjacent circular weft steel wires is consistent, which can make the stress distribution uniform around the entire pipe body. The uniform stress distribution helps to improve the overall strength and pressure resistance of the pipe body and reduce the risk of breakage caused by stress concentration.

[0028] See attached Figure 1 and attached Figure 3 where attached Figure 1 is that the warp layer is arranged on the inner wall of the pipe body, that is, starting from the inner wall, the warp layer is below and the weft layer is above; Figure 3The inner wall of the pipe body is provided with a weft layer. That is, starting from the inner wall, the weft layer is below and the warp layer is above. In other words, in terms of the specific structure, the layer adjacent to the inner wall of the pipe body 1 can be the weft layer 3 or the warp layer 2. On both sides of the warp layer 2, a single-layer weft layer 3 or multiple-layer weft layers 3 are both acceptable. The adjacent weft layer 3 and warp layer 2 form a group of steel mesh skeletons. That is, the weft layer 3 can be above the warp layer 2, or the warp layer 2 can be above the weft layer 3. The warp wires and the circular weft wires are welded and fixed at each intersection point, making the reinforcement skeleton a whole. At the same time, it is ensured that when the pipe is extrusion-molded, the skeleton will not shift or deform inside the pipe.

[0029] As a preferred embodiment of the present utility model, the inner and outer walls of the pipe body 1 are made of thermoplastic plastics. An interpenetration is formed between the steel mesh skeleton and the plastic, ensuring that the plastic does not delaminate and the steel mesh does not shift. Moreover, the inner wall is smooth with small resistance, minimizing the pipeline frictional loss to the greatest extent. And the whole pipe has the advantages of corrosion resistance, wear resistance, and non-scaling.

[0030] The reinforcement phase composed of the welded steel mesh skeleton can greatly improve the ring stiffness of the pipe, having strong advantages for pipes commonly used in buried and overhead applications, and enhancing the ability to resist deformation and bending.

[0031] During specific implementation, the steel mesh skeleton reinforcement structure can have various forms, such as: one layer of warp wires + one layer of circular weft wires, one layer of warp wires + two layers of circular weft wires, one layer of warp wires + one layer of circular weft wires + one layer of warp wires + one layer of circular weft wires, and so on; when a multi-layer steel mesh reinforcement structure is adopted, the layers can be welded to each other or arranged with a certain gap.

[0032] The cross-sectional shapes of the circular weft wires and the warp wires are circular, rectangular, or other shapes that meet the requirements.

[0033] During production, each contact point is fixed through a welding process. Resistance welding, laser welding, or other welding methods that meet the requirements can be used. Since the circular weft wires and the warp wires are welded and fixed at each contact point, the steel mesh skeleton becomes a whole. At the same time, it is ensured that when the pipe is extrusion-molded, the steel mesh skeleton will not shift or deform inside the pipe.

[0034] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the scope of protection of the claims of the present utility model.

Claims

1. A welded steel mesh skeleton reinforced plastic composite pipe, 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 (2) and a weft layer (3); the warp layer (2) is a plurality of steel wires uniformly arranged along the axial direction of the tube body and on its circumference; the weft layer (3) is a circular weft steel wire continuously arranged along the circumference of the tube body; the plurality of warp steel wires and the circular weft steel wires are welded at contact points to form a steel mesh skeleton, and the number of layers of the warp layer (2) and the weft layer (3) are both set to at least one layer.

2. A welded steel mesh skeleton reinforced plastic composite pipe according to claim 1, characterized in that: The spacing between adjacent circular weft wires in the same weft layer is consistent.

3. The welded steel mesh skeleton reinforced plastic composite pipe according to claim 1, characterized in that: The weft layer (3) or the warp layer (2) may be arranged adjacent to the inner wall of the tube body (1), and the two sides of the warp layer (2) may be a single-layer weft layer (3) or multiple-layer weft layers (3), and the warp layer (2) and the weft layer (3) are welded to form a reinforced steel mesh skeleton.

4. The welded 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.

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

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

7. The welded steel mesh skeleton reinforced plastic composite pipe according to claim 1, characterized in that: The welding of the contact points between the circular weft steel wires and the warp steel wires is carried out by resistance welding or laser welding.

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