Steel wire mesh reinforced polyvinyl chloride composite pipeline for water supply and preparation method thereof

Abstract

The invention relates to the technical field of composite pipelines, in particular to a steel wire mesh reinforced polyvinyl chloride composite pipeline for water supply and a preparation method of the steel wire mesh reinforced polyvinyl chloride composite pipeline. The polyvinyl chloride plastic pipe is firstly extruded, the cylindrical mold core is positioned by utilizing the limiting raised lines of the polyvinyl chloride plastic pipe to form the two arc-shaped grooves, and then the three-dimensional steel wire mesh formed by crisscross interweaving iron wires is adopted to replace a common plane steel wire mesh formed by stamping a steel sheet in the prior art. The three-dimensional steel wire mesh has better rigidity and pressure resistance compared with a single-layer plane steel wire mesh, so that two layers of steel wire meshes do not need to be arranged to improve the strength, molten polyvinyl chloride is poured into the arc-shaped grooves subsequently, the steel wire mesh is buried in the polyvinyl chloride pipe, and compared with a stacked and bonded structure in the prior art, a bonding layer is omitted, and the cost is reduced. The preparation method is simplified.

Description

Technical Field

[0001] The invention relates to the technical field of composite pipes, and in particular to a steel wire mesh reinforced polyvinyl chloride composite pipe for water supply and a preparation method thereof. Background Art

[0002] A Chinese patent with authorization announcement number CN112303345B discloses a multi-layer steel wire mesh reinforced composite pipe, which uses a plastic pipe, an adhesive resin layer and a steel wire mesh to overlap each other to form a multi-layer structure. The first adhesive resin layer can improve the fixing strength of the first steel wire mesh on the outer surface of the plastic pipe. The first steel wire mesh and the second steel wire mesh both have a diamond mesh structure, and are staggered in the vertical direction to form a staggered diamond mesh structure with a smaller single diamond area. This arrangement can improve the internal pressure resistance and external pressure resistance and stiffness of the multi-layer steel wire mesh reinforced composite pipe.

[0003] However, the preparation method of the multi-layer wire mesh reinforced composite pipe involved in the above patent scheme is cumbersome and requires the 7-layer structure to be bonded to each other. Therefore, how to provide a wire mesh reinforced polyvinyl chloride composite pipe for water supply and a preparation method thereof, which can have good rigidity and pressure resistance and simplify the preparation method, has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The technical problem to be solved by the present invention is: how to provide a wire mesh reinforced polyvinyl chloride composite pipe for water supply and a preparation method thereof, which can have good rigidity and pressure resistance and simplify the preparation method.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] The method for preparing a wire mesh reinforced polyvinyl chloride composite pipe for water supply comprises the following steps:

[0007] Step 1: extrude a polyvinyl chloride plastic tube, so that the inner wall of the polyvinyl chloride plastic tube is provided with two mutually symmetrical limiting convex strips, and the axial direction of the limiting convex strips is parallel to the axial direction of the polyvinyl chloride plastic tube;

[0008] Step 2: insert the polyvinyl chloride plastic tube into the cylindrical mold core, the cylindrical mold core is coaxially sleeved with a limiting disk, so that the axes of the cylindrical mold core and the polyvinyl chloride plastic tube coincide, one end surface of the polyvinyl chloride plastic tube abuts against the limiting disk, the diameter of the cylindrical mold core is equal to the distance between the two limiting convex strips, so that two mutually symmetrical arc grooves are formed between the cylindrical mold core and the polyvinyl chloride plastic tube;

[0009] Step 3: preparing a three-dimensional steel wire mesh, wherein the three-dimensional steel wire mesh is formed by crisscrossing and interweaving a plurality of straight iron wires;

[0010] Step 4: Cut the three-dimensional steel wire mesh to a width less than half of the inner diameter of the polyvinyl chloride plastic pipe, and place two cut three-dimensional steel wire meshes in the arc-shaped grooves respectively, with a spacing between the three-dimensional steel wire mesh and the cylindrical mold core;

[0011] Step 5: pouring molten polyvinyl chloride into the arc-shaped groove so that the polyvinyl chloride fills the arc-shaped groove;

[0012] Step 6: Separate the cylindrical mold core from the inner wall of the polyvinyl chloride plastic tube to complete the processing.

[0013] Furthermore, in the method for preparing the wire mesh reinforced polyvinyl chloride composite pipe for water supply, the inner end of the limiting strip is provided with a limiting arc surface matching the cylindrical mold core.

[0014] Furthermore, in the method for preparing the above-mentioned wire mesh reinforced polyvinyl chloride composite pipe for water supply, the thickness of the limiting strip is the sum of the thickness of the polyvinyl chloride plastic pipe and the thickness of the three-dimensional wire mesh.

[0015] The invention also protects the steel wire mesh reinforced polyvinyl chloride composite pipe for water supply prepared by the preparation method of the steel wire mesh reinforced polyvinyl chloride composite pipe for water supply.

[0016] The beneficial effects of the present invention are as follows: in the preparation method of the wire mesh reinforced polyvinyl chloride composite pipe for water supply involved in the present invention, the polyvinyl chloride plastic pipe is first extruded, and the cylindrical mold core is positioned by using the limiting convex strips of the polyvinyl chloride plastic pipe to form two arc-shaped grooves, and then a three-dimensional wire mesh formed by criss-crossing iron wires is used to replace the flat wire mesh formed by stamping steel sheets commonly used in the prior art, so that the three-dimensional wire mesh has better rigidity and pressure resistance than the single-layer flat wire mesh, so that there is no need to set two layers of wire mesh to improve the strength, and subsequently, molten polyvinyl chloride is poured into the arc-shaped groove to bury the wire mesh inside the polyvinyl chloride pipe. Compared with the stacked and bonded structure in the prior art, the bonding layer is omitted, and the preparation method is simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic flow chart of a method for preparing a wire mesh reinforced polyvinyl chloride composite pipe for water supply according to a specific embodiment of the present invention;

[0018] Figure 2 It is a cross-sectional view of the step 4 state of a method for preparing a wire mesh reinforced polyvinyl chloride composite pipe for water supply according to a specific embodiment of the present invention;

[0019] Figure 3 This is a view in the unfolding direction of a three-dimensional steel wire mesh in a steel wire mesh reinforced polyvinyl chloride composite pipe for water supply according to a specific embodiment of the present invention;

[0020] Figure 4A thickness direction view of a three-dimensional steel wire mesh in a steel wire mesh reinforced polyvinyl chloride composite pipe for water supply according to a specific embodiment of the present invention;

[0021] Description of labels:

[0022] 1. Polyvinyl chloride plastic pipe; 11. Position limiting convex strip; 12. Position limiting cambered surface;

[0023] 2. Cylindrical mold core; 21. Limiting disc;

[0024] 3. Three-dimensional wire mesh. DETAILED DESCRIPTION

[0025] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0026] Please refer to Figures 1 to 4 The specific embodiment of the present invention relates to a method for preparing a wire mesh reinforced polyvinyl chloride composite pipe for water supply, comprising the following steps:

[0027] Step 1: extrude a polyvinyl chloride plastic tube 1, so that the inner wall of the polyvinyl chloride plastic tube 1 is provided with two mutually symmetrical limiting convex strips 11, and the axial direction of the limiting convex strips 11 is parallel to the axial direction of the polyvinyl chloride plastic tube 1;

[0028] Step 2: insert the polyvinyl chloride plastic tube 1 into the cylindrical mold core 2, the cylindrical mold core 2 is coaxially sleeved with a limiting disk 21, so that the axes of the cylindrical mold core 2 and the polyvinyl chloride plastic tube 1 coincide, one end surface of the polyvinyl chloride plastic tube 1 abuts against the limiting disk 21, the diameter of the cylindrical mold core 2 is equal to the distance between the two limiting convex strips 11, so that two symmetrical arc grooves are formed between the cylindrical mold core 2 and the polyvinyl chloride plastic tube 1;

[0029] Step 3: preparing a three-dimensional steel wire mesh 3, wherein the three-dimensional steel wire mesh 3 is formed by crisscrossing and interweaving a plurality of straight iron wires;

[0030] Step 4: Cut the three-dimensional steel wire mesh 3 to a width less than half of the inner diameter of the polyvinyl chloride plastic tube 1, and place two cut three-dimensional steel wire meshes 3 in the arc-shaped grooves respectively, with a spacing between the three-dimensional steel wire mesh 3 and the cylindrical mold core 2;

[0031] Step 5: pouring molten polyvinyl chloride into the arc-shaped groove so that the polyvinyl chloride fills the arc-shaped groove;

[0032] Step 6: Separate the cylindrical mold core 2 from the inner wall of the polyvinyl chloride plastic tube 1 to complete the processing.

[0033] In the above embodiment, a polyvinyl chloride plastic tube 1 is first extruded, and the cylindrical mold core 2 is positioned by using the limiting convex strips 11 of the polyvinyl chloride plastic tube 1 to form two arc-shaped grooves. Then, a three-dimensional steel wire mesh 3 formed by criss-crossing iron wires is used to replace the flat steel wire mesh formed by stamping steel sheets commonly used in the prior art. The three-dimensional steel wire mesh 3 has better rigidity and pressure resistance than a single-layer flat steel wire mesh, and there is no need to set two layers of steel wire mesh to improve the strength. Subsequently, molten polyvinyl chloride is poured into the arc-shaped groove so that the steel wire mesh is buried inside the polyvinyl chloride tube. Compared with the stacked and bonded structure in the prior art, the bonding layer is omitted, thereby simplifying the preparation method.

[0034] As a preferred embodiment, the inner end of the limiting strip is provided with a limiting arc surface 12 matching the cylindrical mold core 2 .

[0035] In the above embodiments, the limiting arc surface 12 can coaxially position the cylindrical mold core 2 more stably.

[0036] As a preferred embodiment, the thickness of the position-limiting strip is the sum of the thickness of the polyvinyl chloride plastic tube 1 and the thickness of the three-dimensional steel wire mesh 3 .

[0037] In the above embodiment, after pouring the molten polyvinyl chloride in the arc groove, refer to Figure 1 The three-dimensional steel wire mesh 3 is buried in the middle of the polyvinyl chloride pipe, which further ensures the rigidity and pressure resistance of the composite pipe.

[0038] The specific implementation manner of the present invention also relates to a steel wire mesh reinforced polyvinyl chloride composite pipe for water supply prepared by a preparation method of the steel wire mesh reinforced polyvinyl chloride composite pipe for water supply.

[0039] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Preparation method of wire mesh reinforced polyvinyl chloride composite pipe for water supply, It is characterized in that The following steps are involved: Step 1: extrude a polyvinyl chloride plastic tube, so that the inner wall of the polyvinyl chloride plastic tube is provided with two mutually symmetrical limiting convex strips, and the axial direction of the limiting convex strips is parallel to the axial direction of the polyvinyl chloride plastic tube; Step 2: insert the polyvinyl chloride plastic tube into the cylindrical mold core, the cylindrical mold core is coaxially sleeved with a limiting disk, so that the axes of the cylindrical mold core and the polyvinyl chloride plastic tube coincide, one end surface of the polyvinyl chloride plastic tube abuts against the limiting disk, the diameter of the cylindrical mold core is equal to the distance between the two limiting convex strips, so that two mutually symmetrical arc grooves are formed between the cylindrical mold core and the polyvinyl chloride plastic tube; Step 3: preparing a three-dimensional steel wire mesh, wherein the three-dimensional steel wire mesh is formed by crisscrossing and interweaving a plurality of straight iron wires; Step 4: Cut the three-dimensional steel wire mesh to a width less than half of the inner diameter of the polyvinyl chloride plastic pipe, and place two cut three-dimensional steel wire meshes in the arc-shaped grooves respectively, with a spacing between the three-dimensional steel wire mesh and the cylindrical mold core; Step 5: pouring molten polyvinyl chloride into the arc-shaped groove so that the polyvinyl chloride fills the arc-shaped groove; Step 6: Separate the cylindrical mold core from the inner wall of the polyvinyl chloride plastic tube to complete the processing.

2. The method for preparing the wire mesh reinforced polyvinyl chloride composite pipe for water supply according to claim 1, It is characterized in that The inner side end of the limiting pattern strip is provided with a limiting arc surface matching the cylindrical mold core.

3. The method for preparing the wire mesh reinforced polyvinyl chloride composite pipe for water supply according to claim 1, It is characterized in that The thickness of the limiting strip is the sum of the thickness of the polyvinyl chloride plastic pipe and the thickness of the three-dimensional steel wire mesh.

4. The wire mesh reinforced polyvinyl chloride composite pipe for water supply obtained by the method for preparing the wire mesh reinforced polyvinyl chloride composite pipe for water supply according to any one of claims 1 to 3.

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