Steel wire mesh skeleton plastic composite pipe with enhanced interlayer bonding force

Abstract

This invention provides a steel wire mesh reinforced plastic composite pipe with enhanced interlayer bonding, relating to the technical field of steel wire mesh reinforced composite pipes. It includes a composite pipe body, a first steel wire mesh skeleton, a second steel wire mesh skeleton, and multiple elastic support rings. The first steel wire mesh skeleton includes multiple first spiral steel wires, each with a first C-shaped segment bent and forming an opening facing the axis of the composite pipe body. The second steel wire mesh skeleton includes multiple second spiral steel wires, each with a second C-shaped segment bent and forming an opening facing away from the axis of the composite pipe body. The first and second steel wire mesh skeletons of this invention can cooperate and interlock, improving the relative stability of the skeleton and the mechanical anchoring stability with the bonding layers, reducing the risk of interlayer displacement and peeling, thereby enhancing the strength and stability of the composite pipe to withstand the effects of internal water hammer impact and external bending, vibration, and impact.

Description

Technical Field

[0001] This invention relates to the field of steel wire mesh reinforced composite pipe technology, and particularly to a steel wire mesh reinforced plastic composite pipe with enhanced interlayer bonding strength. Background Technology

[0002] Steel wire mesh reinforced composite pipe is made of high-strength steel wire mesh reinforced by winding and combined with high-density polyethylene matrix. This structure gives it excellent composite effect, combining the advantages of steel pipe and plastic pipe. Its pressure resistance is significantly improved compared with PE solid wall pipe, and it is widely used in pressure pipeline transportation in the fields of oil, natural gas and chemical industry.

[0003] The existing steel wire mesh reinforced composite pipe lacks an interlocking structure between its layers. As a result, during use, the bonding force between the layers of the steel wire mesh reinforced composite pipe decreases due to continuous internal water hammer impact and external bending, vibration, and impact, creating a risk of delamination. At the same time, the steel wire mesh reinforced composite pipe lacks elasticity. After the steel wire mesh skeleton is compressed, the internal steel wire mesh skeleton can not elastically recover after slight deformation, resulting in a decrease in the compressive strength of the steel wire mesh reinforced composite pipe. Summary of the Invention

[0004] To address the technical problems of existing steel wire mesh reinforced composite pipes, such as the lack of mechanical interlocking between layers, easy delamination during use, and lack of elastic recovery force, this invention provides a steel wire mesh reinforced plastic composite pipe with enhanced interlayer bonding strength.

[0005] The technical solutions provided by the embodiments of the present invention are as follows:

[0006] This invention provides a steel wire mesh skeleton plastic composite pipe with enhanced interlayer bonding force, comprising: a composite pipe body, a first steel wire mesh skeleton, a second steel wire mesh skeleton, and multiple elastic support rings;

[0007] The first wire mesh skeleton includes a plurality of first spiral steel wires, and each of the plurality of first spiral steel wires is bent into a first C-shaped segment with an opening facing the axis of the composite tube;

[0008] The second wire mesh skeleton includes multiple second spiral wires, each of which is bent into a second C-shaped segment with an opening facing away from the axis of the composite tube.

[0009] The number of the first spiral steel wire and the second spiral steel wire are the same and correspond one-to-one. The first C-shaped segment is sleeved on the outer wall of the second spiral steel wire, and the second C-shaped segment is sleeved on the outer wall of the first spiral steel wire, forming an interlocking structure that fits together.

[0010] The elastic support ring includes a support ring body, which is matched with multiple first C-shaped segments for limiting. The outer circumference of the support ring is provided with limiting grooves corresponding to the second spiral steel wire. The second spiral steel wire is engaged inside the limiting grooves to limit and support the second spiral steel wire. A weakening groove is provided between every two adjacent limiting grooves on the outer circumference of the support ring, so that the part of the support ring body located between adjacent limiting grooves forms an elastic deformation zone.

[0011] By interlocking the first and second wire mesh skeletons, the bonding force between the layers of the composite pipe can be improved, thereby enhancing the strength and stability of the composite pipe.

[0012] Optionally, the composite pipe body includes a protective layer, a bonding layer, and an inner lining layer. The bonding layer is disposed between the protective layer and the inner lining layer and is used to bond and fix the protective layer and the inner lining layer.

[0013] Optionally, multiple first spiral steel wires are distributed at equal intervals along the circumference of the composite pipe and extend spirally along its axial direction, while multiple second spiral steel wires are also distributed at equal intervals along the circumference of the composite pipe and extend spirally in the opposite direction along its axial direction.

[0014] Optionally, the spiral structure formed by the first spiral wire of the first wire mesh skeleton is disposed inside the spiral structure formed by the second spiral wire of the second wire mesh skeleton.

[0015] Optionally, the elastic support ring is made of spring steel.

[0016] Optionally, the cross-sectional shape of the elastic support ring is a semi-circular cross-section, and the arc surface of the semi-circular cross-section of the elastic support ring is in contact with the inner arc surface of the first C-shaped segment.

[0017] Optionally, the first wire mesh skeleton and the second wire mesh skeleton are disposed inside the bonding layer.

[0018] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following:

[0019] 1. The first wire mesh skeleton and the second wire mesh skeleton of the present invention can cooperate and interlock with each other to improve the relative stability of the skeleton and the mechanical anchoring stability with the bonding layer, reduce the risk of interlayer relative displacement and peeling, thereby enhancing the strength and stability of the composite pipe to cope with the impact of water hammer impact inside the composite pipe and external bending, vibration and impact.

[0020] 2. The elastic support ring of the present invention can further improve the radial compressive strength of the composite pipe and provide elastic restoring force when the composite pipe is squeezed and deformed, so that the slightly deformed first and second wire mesh skeletons can be restored, avoiding radial flattening and out-of-roundness of the composite pipe, which would reduce the ring stiffness and pressure bearing capacity of the composite pipe. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a partial structural diagram of a steel wire mesh skeleton plastic composite pipe with enhanced interlayer bonding force, provided as an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the overall structure of a steel wire mesh skeleton plastic composite pipe with enhanced interlayer bonding force, provided as an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the first wire mesh skeleton of a steel wire mesh skeleton plastic composite pipe with enhanced interlayer bonding force, provided as an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the second wire mesh skeleton of a steel wire mesh skeleton plastic composite pipe with enhanced interlayer bonding force, provided as an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the structure of an elastic support ring for a steel wire mesh skeleton plastic composite pipe with enhanced interlayer bonding force, provided as an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the cooperation structure between the elastic support ring and the first and second steel wire mesh skeletons of a steel wire mesh skeleton plastic composite pipe with enhanced interlayer bonding force, provided in an embodiment of the present invention.

[0028] Figure 7 This is a cross-sectional view of a composite pipe structure with a steel wire mesh skeleton plastic composite pipe that enhances interlayer bonding, provided as an embodiment of the present invention.

[0029] Figure label:

[0030] 1. Composite pipe body; 101. Protective layer; 102. Bonding layer; 103. Inner lining layer;

[0031] 2. First wire mesh frame; 201. First spiral wire; 202. First C-shaped segment;

[0032] 3. Second wire mesh frame; 301. Second spiral wire; 302. Second C-shaped section;

[0033] 4. Elastic support ring; 401. Support ring body; 402. Weakening groove; 403. Limiting groove.

[0034] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0035] The technical solutions of the present invention will now be described with reference to the accompanying drawings. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies. Furthermore, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0036] like Figures 1 to 7 As shown, an embodiment of the present invention provides a steel wire mesh skeleton plastic composite pipe with enhanced interlayer bonding force, comprising: a composite pipe body 1, a first steel wire mesh skeleton 2, a second steel wire mesh skeleton 3, and a plurality of elastic support rings 4;

[0037] The first wire mesh skeleton 2 includes a plurality of first spiral steel wires 201, and each of the plurality of first spiral steel wires 201 is bent into a first C-shaped segment 202 with an opening facing the axis of the composite tube 1.

[0038] The second wire mesh skeleton 3 includes a plurality of second spiral wires 301, and each of the plurality of second spiral wires 301 is bent into a second C-shaped section 302 with an opening facing away from the axis of the composite tube 1;

[0039] The number of first spiral steel wires 201 and second spiral steel wires 301 are the same and correspond one-to-one. The first C-shaped segment 202 is sleeved on the outer wall of the second spiral steel wire 301, and the second C-shaped segment 302 is sleeved on the outer wall of the first spiral steel wire 201, forming an interlocking structure that fits together.

[0040] The elastic support ring 4 includes a support ring body 401, which is limited and cooperates with a plurality of first C-shaped segments 202. The outer circumference of the support ring body 401 is provided with a limiting groove 403 corresponding to the second spiral steel wire 301. The second spiral steel wire 301 is engaged inside the limiting groove 403 to limit and support the second spiral steel wire 301. A weakening groove 402 is provided between every two adjacent limiting grooves 403 on the outer circumference of the support ring body 401, so that the part of the support ring body 401 located between adjacent limiting grooves 403 forms an elastic deformation zone.

[0041] In one possible implementation, the composite pipe 1 includes a protective layer 101, a bonding layer 102, and an inner lining layer 103. The bonding layer 102 is disposed between the protective layer 101 and the inner lining layer 103 for bonding and fixing the protective layer 101 and the inner lining layer 103.

[0042] The first wire mesh frame 2 and the second wire mesh frame 3 are disposed inside the bonding layer 102.

[0043] In one possible implementation, a plurality of first spiral steel wires 201 are distributed at equal intervals along the circumference of the composite tube body 1 and extend spirally along its axial direction, while a plurality of second spiral steel wires 301 are also distributed at equal intervals along the circumference of the composite tube body 1 and extend spirally in the opposite direction along its axial direction.

[0044] The spiral structure formed by the first spiral wire 201 of the first wire mesh skeleton 2 is set inside the spiral structure formed by the second spiral wire 301 of the second wire mesh skeleton 3.

[0045] It should be noted that the first wire mesh skeleton 2 and the second wire mesh skeleton 3 of the present invention can cooperate and interlock with each other to improve the bonding force between the layers of the composite pipe, thereby enhancing the strength and stability of the composite pipe to cope with the effects of water hammer impact inside the composite pipe and external bending, vibration and impact.

[0046] Specifically, by interlocking the first C-shaped segment 202 on the first spiral steel wire 201 with the second C-shaped segment 302 on the second spiral steel wire 301, when the first wire mesh skeleton 2 and the second wire mesh skeleton 3 are fixed inside the composite pipe body 1, the first wire mesh skeleton 2 and the second wire mesh skeleton 3 are locked together by the first C-shaped segment 202 and the second C-shaped segment 302, which improves stability and structural strength. At this time, the interlocking structure formed by the first wire mesh skeleton 2 and the second wire mesh skeleton 3 will form a three-dimensional contact surface inside the composite pipe body 1, which enhances the bonding strength and stability between the composite pipe body 1, the first wire mesh skeleton 2, and the second wire mesh skeleton 3.

[0047] Meanwhile, the annular structure formed by the first C-shaped segment 202 on the first spiral steel wire 201 and the second C-shaped segment 302 on the second spiral steel wire 301 can form annular reinforcing ribs, thereby improving the radial resistance strength of the composite pipe.

[0048] In one possible implementation, the support ring 401 is disposed between the first C-shaped segments 202 of a plurality of first spiral steel wires 201;

[0049] The elastic support ring 4 is made of spring steel to ensure that the elastic support ring 4 has sufficient support strength;

[0050] The cross-sectional shape of the elastic support ring 4 is a semi-circular cross-section, and the arc surface of the semi-circular cross-section of the elastic support ring 4 is in contact with the inner arc surface of the first C-shaped segment 202.

[0051] It should be noted that the elastic support ring 4 of the present invention can further improve the radial compressive strength of the composite pipe and provide elastic recovery force when the composite pipe is squeezed and deformed, so that the slight deformation of the first wire mesh skeleton 2 and the second wire mesh skeleton 3 within the elastic deformation range can be recovered, avoiding radial flattening and out-of-roundness of the composite pipe, which would reduce the pressure bearing capacity of the composite pipe.

[0052] The elastic support ring 4 of the present invention can simultaneously cooperate with the first C-shaped segment 202 and the second spiral steel wire 301 at the interlocking part of the first steel wire mesh skeleton and the second steel wire mesh skeleton to form a three-dimensional reinforcing node with anti-slip, radial bearing and elastic reset effects, thereby further improving the radial resistance strength of the composite pipe.

[0053] Specifically, when the first wire mesh frame 2 and the second wire mesh frame 3 are subjected to excessive pressure and undergo slight deformation, the first wire mesh frame 2 and the second wire mesh frame 3 will simultaneously compress the elastic support ring 4 to deform, allowing the elastic support ring 4 to deform and buffer and store force. After the pressure disappears, the elastic support ring 4 elastically recovers and continues to apply a restoring force to the first wire mesh frame 2 and the second wire mesh frame 3, allowing the first wire mesh frame 2 and the second wire mesh frame 3 to gradually recover under the elastic pressure of the elastic support ring 4.

[0054] It should be noted that when manufacturing the steel wire mesh reinforced plastic composite pipe, the elastic support ring 4 is first fixed to the outer wall of the braiding frame of the steel wire braiding machine according to the assembly interval (the braiding frame must be a mesh frame with a diameter reduction adjustment function, the mesh frame provides clearance for the second C-shaped section 302, and the diameter reduction adjustment function facilitates the subsequent disassembly and assembly of the formed steel wire mesh frame). Then, the steel wire braiding machine divides the steel wires into two groups, A and B, with the same number and one-to-one correspondence (group A corresponds to the second steel wire mesh frame 3, and group B corresponds to the first steel wire mesh frame 2). Group A is fed in a clockwise direction and group B is fed in a counterclockwise direction along a figure-eight track. When the two groups of steel wires are fed out, both groups of steel wires pass through a pair of pressure rollers controlled by a motor. One pressure roller has a groove adapted to the C-section, and the other pressure roller has a protrusion adapted to the C-section. By controlling the pressure roller speed, angular phase, and wire feeding speed, the periodic bending position of the pressure roller corresponds to the preset spacing of adjacent C-sections on the steel wire. This ensures that as the steel wire passes through these pressure rollers, the C-sections are bent and formed according to the preset spacing. The pressure rollers are fixedly connected to the wire feeding mechanism (the installation orientation and angle of the pressure rollers need to be adjusted according to the opening direction of the two sets of C-sections), ensuring that the steel wire continues to move along the preset track during C-section forming. Simultaneously, another pair of motor-controlled clamping rollers, set at a 90-degree angle perpendicularly to the pair of motor-controlled pressure rollers, can be installed (to prevent clamping). The C-section, held by a clamping roller, is clamped on the outer wall of the steel wire, buffering and offsetting the tension of the pressure roller bending the C-section, preventing the already formed C-section on the steel wire from deforming under tension during subsequent C-section forming; the two sets of steel wires, with the wire feeding mechanism of the braiding machine adjusting the wire feeding speed in real time, cross and wrap around the elastic support ring 4, so that the A-group steel wire is stuck inside the limiting groove 403 of the elastic support ring 4, and the C-section on the B-group steel wire is limited and fitted on the outer wall of the elastic support ring 4, so that the C-section of the B-group steel wire is sleeved on the corresponding outer wall of the A-group steel wire inside the limiting groove 403, and then the B-group steel wire is inserted into the corresponding C-section of the A-group steel wire to form a steel wire mesh skeleton (i.e., the first steel wire). (The wire mesh skeleton 2, the second wire mesh skeleton 3, and the elastic support ring 4 are in a coordinated state). The wire braiding machine traction mechanism pulls forward at a uniform speed, controlling the braiding pitch, until the formed wire mesh skeleton reaches the set length and then stops. Then, the woven wire mesh skeleton is removed from the braiding frame and placed on the outer wall of the extruded inner lining layer 103. Finally, the wire mesh skeleton and the inner lining layer 103 are transported together to the extruder process, where the bonding layer 102 and the protective layer 101 are extruded sequentially on the wire mesh skeleton and the inner lining layer 103 (a double-layer co-extrusion process can also be used to complete the processing steps of the bonding layer 102 and the protective layer 101 in one extrusion process), forming a complete wire mesh skeleton plastic composite pipe.

[0055] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0056] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A steel wire mesh reinforced plastic composite pipe with enhanced interlayer bonding strength, characterized in that, include: Composite pipe body (1), first wire mesh skeleton (2), second wire mesh skeleton (3) and multiple elastic support rings (4); The first wire mesh skeleton (2) includes a plurality of first spiral wires (201), and each of the plurality of first spiral wires (201) is bent into a first C-shaped segment (202) with an opening facing the axis of the composite tube (1). The second wire mesh skeleton (3) includes a plurality of second spiral wires (301), and each of the plurality of second spiral wires (301) is bent into a second C-shaped segment (302) with an opening facing away from the axis of the composite tube (1). The first spiral steel wire (201) and the second spiral steel wire (301) are the same in number and correspond one-to-one. The first C-shaped segment (202) is sleeved on the outer wall of the second spiral steel wire (301), and the second C-shaped segment (302) is sleeved on the outer wall of the first spiral steel wire (201), forming an interlocking structure that fits together. The elastic support ring (4) includes a support ring body (401), which is matched with multiple first C-shaped segments (202). The outer circumference of the support ring body (401) is provided with a limiting groove (403) corresponding to the second spiral wire (301). The second spiral wire (301) is engaged inside the limiting groove (403) to limit and support the second spiral wire (301). A weakening groove (402) is provided between every two adjacent limiting grooves (403) on the outer circumference of the support ring body (401) so that the part of the support ring body (401) located between adjacent limiting grooves (403) forms an elastic deformation zone.

2. The steel wire mesh reinforced plastic composite pipe with enhanced interlayer bonding strength according to claim 1, characterized in that, The composite pipe (1) includes a protective layer (101), a bonding layer (102) and an inner lining layer (103). The bonding layer (102) is disposed between the protective layer (101) and the inner lining layer (103) for bonding and fixing the protective layer (101) and the inner lining layer (103).

3. The steel wire mesh reinforced plastic composite pipe with enhanced interlayer bonding strength according to claim 1, characterized in that, Multiple first spiral steel wires (201) are distributed at equal intervals along the circumference of the composite tube (1) and extend spirally along its axial direction. Multiple second spiral steel wires (301) are also distributed at equal intervals along the circumference of the composite tube (1) and extend spirally in the opposite direction along its axial direction.

4. A steel wire mesh reinforced plastic composite pipe with enhanced interlayer bonding strength according to claim 3, characterized in that, The spiral structure formed by the first spiral wire (201) of the first wire mesh skeleton (2) is set inside the spiral structure formed by the second spiral wire (301) of the second wire mesh skeleton (3).

5. A steel wire mesh reinforced plastic composite pipe with enhanced interlayer bonding strength according to claim 1, characterized in that, The elastic support ring (4) is made of spring steel.

6. A steel wire mesh reinforced plastic composite pipe with enhanced interlayer bonding strength according to claim 1, characterized in that, The cross-sectional shape of the elastic support ring (4) is a semi-circular cross-section, and the arc surface of the semi-circular cross-section of the elastic support ring (4) is in contact with the inner arc surface of the first C-shaped segment (202).

7. A steel wire mesh reinforced plastic composite pipe with enhanced interlayer bonding strength according to claim 2, characterized in that, The first wire mesh skeleton (2) and the second wire mesh skeleton (3) are disposed inside the bonding layer (102).

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