A sealing head structure of a steel wire mesh pipe and a sealing head processing method thereof

Abstract

The application relates to a head structure of a steel wire mesh pipe and a sealing processing method thereof, and belongs to the technical field of pipe sealing processing. In order to solve the problem of poor connection strength, the application provides the head structure of the steel wire mesh pipe and the sealing processing method thereof. The method comprises the following steps: a pipe body and a pipe head with a ring-shaped stopper after pre-processing; when combined, the circumferential inner wall of the ring-shaped stopper protrudes inward along the radial direction of the pipe head to the inner wall of the pipe body; the inner wall of the pipe head and the end face of the ring-shaped stopper are heated and melted; extrusion sleeve connection is performed to make the end face of the ring-shaped stopper abut against the end face of the pipe body for extrusion bonding; after bonding is completed, cooling and solidification are performed to obtain the corresponding sealed steel wire mesh pipe. The application can make the connection stability and the connection strength between them better in the circumferential direction, and can also improve the shear strength performance of the whole.

Description

Technical Field

[0001] This invention relates to a head structure for a steel wire mesh pipe and a sealing processing method thereof, belonging to the technical field of pipe sealing processing. Background Technology

[0002] The pipe uses a high-strength steel wire reinforcement layer as the intermediate reinforcing layer, giving it high strength. It is widely used in traditional municipal infrastructure construction and mining water supply and drainage pipelines, and is gradually replacing traditional steel pipes. To improve the performance of the pipe end faces, a sealing ring is typically used to seal the ends of composite pipes such as the pipe body. This involves fusion welding the flat sealing ring to the pipe end face. During the fusion process, the plastic on the pipe end face shrinks axially, causing the steel skeleton to protrude. Over time, this can lead to cracking and damage in the weld area, and even detachment. Furthermore, the small weld contact area of ​​the flat weld results in low bonding strength.

[0003] To improve the defects of using flat sealing rings for butt welding, a common method is to sleeve the sealing fitting onto the end face of the pipe and fix it by fusion. However, the sealing fitting and the inner side of the pipe are designed to be flush, which means that their inner diameters are the same. This can easily cause damage to the connection during use, resulting in poor overall connection strength and defects such as cracking or damage. This can also cause fluids such as water to seep into the inner steel wire reinforcement layer, causing corrosion and rust of the internal material of the steel wire layer, affecting the bonding force between layers and the overall strength of the pipe, and even causing layer detachment. Furthermore, the fluid in the pipe may be subject to cross-contamination due to the influence of the intermediate steel wire layer material caused by seepage. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this invention provides a head structure for a steel wire mesh pipe and a sealing processing method thereof, solving the problem of how to effectively improve the overall connection strength performance of the steel wire mesh pipe.

[0005] One of the objectives of this invention is achieved through the following technical solution: a capping structure for a wire mesh pipe, wherein the wire mesh pipe includes a pipe body, and the capping structure includes a pipe cap. Both ends of the pipe body are fitted with the pipe cap, which is fixedly connected by heat fusion. One end of the pipe cap has an annular retaining edge on its inner side. The annular retaining edge abuts against the end face of the pipe body and is fixed by heat fusion. The characteristic feature is that the circumferential inner wall of the annular retaining edge protrudes radially inward from the inner wall of the pipe body along the pipe cap. An annular sealing portion is located on the inner side of the connection between the annular retaining edge and the pipe body. The annular sealing portion is fixed to the side wall of the annular retaining edge near the pipe body and the inner wall of the pipe body by heat fusion.

[0006] To better mitigate the connection strength issues at the joint between the pipe body and the pipe end cap, this invention adds a structural annular sealing part to the inner side of the joint. This design creates a seal on the inside of the joint, enhancing the overall connection strength. Furthermore, the sealed connection structure effectively prevents pressurized fluids such as water from directly acting radially on the joint between the pipe body and the pipe end cap during use. Simultaneously, to reduce the axial force exerted by fluids such as water on the internal sealing connection, this invention also incorporates a design for the annular flange. Instead of the conventional pipe end cap design where it is flush with the inner wall of the pipe body, the annular flange protrudes inward relative to the inner wall of the pipe body. The structure, with its stepped features between the inner walls, forms a sealed connection. The axial force of the annular flange further enhances the sealing strength. This design also disperses the pressure of fluids like water within the pipe, preventing direct pressure on the heat-fused joint between the pipe end cap and the pipe body. The pressure is distributed across the inner wall of the pipe and the sidewall of the annular flange, ensuring better heat-fused connection strength and preventing corrosion of the internal steel wire reinforcement layer due to water penetration. This avoids interlayer shear stress and potential detachment, maintaining the interlayer bonding strength and providing superior shear strength. Furthermore, the annular flange protrudes inward from the inner wall of the pipe, forming a heat-fused connection with the sealing joint, increasing the overall contact area between the pipe end cap and the pipe body, further strengthening the connection. In summary, this invention can enhance the overall strength of the pipeline and effectively prevent the phenomenon of water or other fluids inside the pipeline penetrating into the intermediate steel wire reinforcement layer under pressure during use. It effectively maintains the bonding strength between pipeline layers and the overall shear strength performance, and avoids pollution of water or other fluids inside the pipe due to penetration.

[0007] In the aforementioned end cap structure of the wire mesh pipe, the pipe body comprises an inner layer, a wire reinforcement layer, and an outer layer from the inside out. Both ends of the wire reinforcement layer extend beyond the end faces of the inner layer, and are bent inwards radially along the pipe body to form a connecting portion. This connecting portion is embedded within the annular retaining flange. By extending and bending the wire reinforcement layer inwards to form the connecting portion, a hook-like structure is created at both ends, effectively improving the structural strength of the inner layer between the axial direction and the intermediate layer, which is equivalent to improving their shear strength. Furthermore, the connecting portion embedded within the annular retaining flange provides better circumferential connection stability and strength.

[0008] In the aforementioned end cap structure of the wire mesh pipe, as another embodiment, the connecting portion extends inward to protrude from the inner wall surface of the inner layer, and one end of the connecting portion is embedded between the annular retaining edge and the annular sealing portion. This effectively allows one end of the connecting portion to be partially embedded between the annular sealing portion and the annular retaining edge, providing a certain positioning and fixing function and further improving the connection strength performance of the annular sealing portion.

[0009] The second objective of this invention is achieved through the following technical solution: a sealing process for a wire mesh pipe, which includes the following steps:

[0010] A. Select a pre-processed pipe body and a pipe end cap with an annular flange on the inner circumferential edge of one end; when the pipe body and the pipe end cap are combined into one unit, the inner circumferential wall of the annular flange protrudes inward along the radial direction of the pipe end cap from the inner wall of the pipe body.

[0011] B. The outer peripheral wall and the end faces at both ends of the pipe body and the pipe end cap are heat-melted together; the inner wall of the pipe end cap and the end face of the annular flange on the side of the pipe body are also heat-melted.

[0012] C. After heating and melting, the pipe end cap and the pipe body are squeezed together so that the end face of the annular flange abuts against the end face of the pipe body and is squeezed and bonded. During the squeezing and bonding process, an annular sealing part is formed on the inner side of the connection between the annular flange and the pipe body by hot melting. After bonding is completed, it is cooled and solidified to obtain the corresponding sealed wire mesh pipe.

[0013] This invention modifies the structure of the pipe end cap through machining, creating an annular flange that, after being combined with the pipe body, protrudes radially from the inner wall of the pipe body. This is equivalent to pre-processing the annular flange so that its inner diameter is smaller than the inner diameter of the pipe body. Subsequently, the corresponding parts to be bonded are heated and melted, and then extruded to connect the pipe end cap to both ends of the pipe body. When the annular flange abuts against the end face of the pipe body, the invention creates a step-like structure at the connection point by making the annular flange protrude inward relative to the inner wall of the pipe body. During extrusion, some molten material is extruded from the inner side of the connection between the pipe body end face and the pipe end cap, forming a sealing connection at this step. This sealing connection also fuses with the side of the annular flange, and a fusion bond is formed between the sealing connection and the inner wall of the pipe body, effectively improving the connection strength. Meanwhile, by adopting the above method, a sealing connection can be effectively formed on the inner side of the connection between the pipe body and the pipe end cap, which can play a certain blocking role and effectively prevent the pressure of water and other fluids in the pipe from acting directly on the connection during use. The sealing connection can play a certain dispersing role, ensuring the performance quality of its connection strength. This effectively prevents the corrosion of the steel wire reinforcement layer inside the inner pipe body caused by the penetration of water and other fluids in the pipe during use, which would reduce the bonding force between the layers or even cause detachment. It can more effectively maintain the overall strength performance and interlayer bonding force of the pipeline, and maintain high shear strength performance.

[0014] In the above-mentioned sealing method for steel wire mesh pipes, preferably, during the pre-processing process in step A, the pipe body is cut while rotating to remove the inner and outer layers of material at both ends, allowing the middle steel wire reinforcement layer to extend beyond the end face of the cut inner layer. The extended portion of the steel wire reinforcement layer is then bent inwards radially along the pipe body to form a connecting part. After cutting, the connecting part abuts against the end face of the cut inner layer. By forming the extended steel wire reinforcement layer at both ends on the cut end face of the pipe body during processing, and by rotating the pipe body circumferentially, the cutting can be more effectively controlled, ensuring the extended portion remains within the required effective length. Furthermore, the rotating cutting process allows for direct cutting of both the outer and inner layers of the end face, with the corresponding steel wire layer bent inwards as the extended portion to form the connecting part. This improves processing efficiency and ensures better quality of the connecting part, resulting in a uniform inward bending structure on the end face of the pipe body, enhancing circumferential distribution and overall connection strength. Furthermore, the structural design of the connecting part allows for the axial fixation of the inner layer at both ends, essentially hooking the inner layer from both ends, thereby effectively improving the bonding strength between the inner layer and the connecting part, especially enhancing their shear strength.

[0015] In the above-mentioned sealing process of steel wire mesh pipe, during the extrusion bonding process in step C, the molten material flows out to the connection between the annular flange and the end face of the pipe body to form the annular sealing part, and the formed annular sealing part is fixed by heat fusion with the side wall of the annular flange on the side of the pipe body and the inner wall of the pipe body.

[0016] In the above-mentioned sealing process for steel wire mesh pipes, during the pre-processing of the pipe end cap in step A, the difference between half the inner diameter of the annular flange and the inner diameter of the pipe body is slightly less than the inner layer thickness of the pipe body. This is equivalent to making the thickness of the annular flange protruding from the inner wall of the pipe slightly less than the required thickness of the inner layer. This allows for better control of the radial thickness of the annular seal formed at the connection, ensuring that even after the connection is bent inwards, it better prevents pressure-bearing fluids such as water from penetrating into the middle layer of the pipe and corroding the steel wire reinforcement layer, effectively maintaining the overall strength performance of the pipe body.

[0017] In the above-mentioned sealing method for steel wire mesh pipes, as another preferred embodiment, in step C, the connecting part extends inward beyond the inner wall surface of the pipe body, and one end of the extending connecting part is embedded between the annular retaining flange and the annular sealing part. This can better improve the connection strength performance of the inner annular sealing part and better improve the overall strength performance of the pipe.

[0018] In summary, compared with the prior art, the present invention has the following advantages:

[0019] 1. By designing the annular flange to protrude inward from the inner wall of the pipe, and combining it with the sealing connection to form a heat fusion connection, it is equivalent to increasing the contact area of ​​the entire fusion between the pipe end cap and the pipe body, and can also better ensure the connection strength between them.

[0020] 2. By extending both ends of the steel wire reinforcement layer and bending them inward to form a connection, and embedding the formed connection into the annular flange, better connection stability and connection strength can be achieved between them in the circumferential direction, and the overall shear strength performance can also be improved.

[0021] 3. This method improves the structural design so that during extrusion, partially molten material can be extruded from the end face of the tube body and the inner side of the connection between the pipe end cap to form a sealing connection at the step, which also welds to the side of the annular flange, effectively improving the connection strength.

[0022] 4. This method involves rotating the tube circumferentially to directly remove the outer and inner layers during the cutting process. The steel wire reinforcement layers left at both ends are bent inward as the protruding steel wire layers to form the connection. This method improves processing efficiency and ensures the quality of the connection. It also creates a uniform inward bending structure on the end face of the tube, which is more conducive to the uniformity of its circumferential distribution and improves the overall connection strength. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the end cap structure of this steel wire mesh pipe.

[0024] Figure 2 yes Figure 1 A magnified structural diagram of point A in the middle.

[0025] Figure 3 This is a schematic diagram of another three-dimensional structure of the end cap of this steel wire mesh pipe.

[0026] Figure 4 yes Figure 3 A magnified structural diagram at point B in the middle.

[0027] In the diagram, 1 is the pipe body; 11 is the inner layer; 12 is the steel wire reinforcement layer; 121 is the connection part; 13 is the outer layer; 2 is the pipe end cap; 21 is the annular flange; and 22 is the annular sealing part. Detailed Implementation

[0028] The technical solution of the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings, but the present invention is not limited to these embodiments.

[0029] Example 1

[0030] Combination Figure 1 and Figure 2As shown, the wire mesh pipe with end cap structure includes a pipe body 1 and a pipe end cap 2. Both ends of the pipe body 1 are fitted with pipe end caps 2 that are fixed together by heat fusion. One end of the pipe end cap 2 has an annular flange 21 on its inner edge. The annular flange 21 abuts against the end face of the pipe body 1 and is fixed by heat fusion. Essentially, after the annular flange 21 and the pipe body 1 are fitted together, the annular flange 21 and the end face of the pipe body 1 are abutted together and bonded. More importantly, the circumferential inner wall of the annular flange 21 protrudes inward along the radial direction of the pipe end cap 2 into the inner wall of the pipe body 1, which is equivalent to making the inner diameter of the annular flange 21 smaller than the inner diameter of the pipe body 1. This allows them to form a rather prominent structure. There is an annular sealing part 22 on the inner side of the connection between the annular flange 21 and the pipe body 1. The annular sealing part 22 is fixed to the side wall of the annular flange 21 on the side of the pipe body 1 and the inner wall of the pipe body 1 by heat fusion. The aforementioned annular sealing part 22 is located at the step formed by the annular flange 21 and the inner side of the pipe body 1. This structural feature allows the annular sealing part 22 to seal the inner side of the joint between the annular flange 21 and the pipe body, effectively providing a blocking function and ensuring the connection strength. Furthermore, the annular sealing part 22 effectively disperses the force at the step formed after the annular flange 21 and the pipe body 1 are bonded together. This means that the annular sealing part 22 adheres to the inner wall of the pipe body 1 and the side of the annular flange 21 closest to the pipe body 1. The surface interaction between the annular sealing part 22 and the joint between the annular flange 21 and the pipe body 1 further disperses the force, improving service life and ensuring bonding strength. Meanwhile, the structural design of the annular sealing part 22 can more effectively increase the overall bonding contact area and further improve the bonding strength performance by increasing the bonding surface. It can better prevent water and other fluid materials in the pipe body from penetrating into the intermediate layer and corroding the steel wire reinforcement layer 12 material, thus avoiding the problem of reduced interlayer bonding force. It can better ensure the overall strength performance, especially the overall shear strength performance of the pipeline.

[0031] In a further preferred embodiment, the tube body 1 comprises an inner layer 11, a steel wire reinforcement layer 12, and an outer layer 13 from the inside out. The steel wire reinforcement layer 12 is positioned between the inner layer 11 and the outer layer 13, forming the tube body 1 structure as a single unit. Furthermore, both ends of the steel wire reinforcement layer 12 extend beyond the end faces of the inner layer 11, and both ends of the steel wire reinforcement layer 12 are bent inwards along the radial direction of the tube body 1 to form connecting portions 121, which are embedded within the annular flange 21. Commonly used materials can be used for the inner layer 11 and the outer layer 13.

[0032] To further enhance the overall strength of the pipeline, the inner diameter of the annular flange 21 can be controlled so that the thickness of the annular flange 21 protruding radially inward from the inner wall of the pipe body 1 is roughly equivalent to the thickness of the inner layer 11. This better ensures the radial thickness requirement, preventing the connection part 121 from bending inward and affecting the thickness requirement between it and the inner wall. It also effectively prevents insufficient bonding or even detachment due to fluid penetration and corrosion of the intermediate layer caused by thinning during use, thus better maintaining the overall strength of the pipeline and the interlayer shear strength. Ideally, the thickness of the annular flange 21 protruding radially inward from the inner wall of the pipe body 1 should be slightly less than the thickness of the inner layer of the pipe body 1. This effectively prevents the steel wire reinforcement layer 12 from becoming thinner relative to the inner wall of the pipe due to inward bending at both ends, effectively preventing corrosion of the inner steel wire reinforcement layer 12 caused by pressure penetration of fluids such as water during use, effectively ensuring the overall strength of the pipeline, and also preventing contamination of fluids such as water inside the pipe due to penetration. Ideally, the thickness of the annular flange 21 protruding radially inward from the inner wall of the tube body 1 should be less than the thickness of the inner layer of the tube body 1 by 1-2 mm, which is equivalent to a difference of 1-2 mm between the two.

[0033] In a further embodiment, when forming the annular sealing part 22, one end of the annular sealing part 22 near the annular flange 12 can extend to the inner wall surface of the annular flange 12 and be fixed by heat fusion connection. This can better seal the connection between the annular flange 12 and the pipe body 1, and improve the overall connection strength. Preferably, the surface of the annular sealing part 22 can also be made into a protruding arc-shaped structure from the annular flange 12 side to the pipe body 1 side. This is equivalent to making the annular sealing part 22 slightly protrude from the inner wall surface of the annular flange 12, which is more conducive to adapting to the flow of fluids such as water in the pipe body 1 during use, and can better reduce the impact of fluids in the pipe during use, improve the overall service life, and better maintain its adhesion.

[0034] Example 2

[0035] The sealing process of this wire mesh pipe can be specifically completed by the following method to achieve the sealing process of the pipe body 1 and pipe end cap 2 of the wire mesh pipe in Example 1:

[0036] Combination Figure 1 and Figure 2Based on the requirements of the steel wire mesh pipe to be processed, a pre-processed pipe body 1 and a pipe end cap 2 with an annular retaining flange 21 on one end of its inner circumferential edge are selected. This means that after processing, the pipe end cap 2 has an inwardly protruding annular retaining flange 21 on one end of its inner circumferential edge. The structural design of the annular retaining flange 21 is such that when the pipe body 1 and the pipe end cap 2 are combined as a whole, the circumferential inner wall of the annular retaining flange 21 protrudes inward along the radial direction of the pipe end cap 2 from the inner wall of the pipe body 1. Here, the materials for both the pipe body 1 and the pipe end cap 2 can be common pipe plastic materials. However, compared with the inner diameter of the pipe end cap 2, it is best to make the outer diameter of the pipe body 1 slightly larger than that of the pipe end cap 2.

[0037] After the pre-processing of the structure of the pipe body 1 and the pipe end cap 2 is completed, the outer peripheral wall of the pipe body 1 and the end faces of both ends of the pipe end cap 2 that are heat-fused together are heated and melted; the inner wall of the pipe end cap 2 and the end face of the annular flange 21 on the side of the pipe body 1 are also heated and melted; the specific temperature control for the heating and melting of the pipe body 1 and the pipe end cap 2 can be controlled according to the general heating and melting temperature, and the specific heating method can use common heating and melting equipment;

[0038] After heating, the pipe body 1 and the pipe end cap 2 can be positioned accordingly. The pipe end cap 2 is then squeezed and fitted onto the pipe body 1, causing the pipe end cap 2 to lean towards the pipe body 1. The end face of the annular flange 21 is directly pressed against the end face of the pipe body 1 and bonded. After bonding, during the extrusion process, excess molten material forms an annular sealing part 22 on the inner side of the connection between the annular flange 21 and the pipe body 1 through heat fusion bonding. After cooling and solidification, a sealed wire mesh pipe is obtained. Due to the structural design of the annular flange protruding inward from the inner wall of the pipe body 1 during the above extrusion bonding process, excess molten material can effectively flow out from the connection and bond to the inner side of the connection to form the annular sealing part 22. The formed annular sealing part 22 forms a heat fusion connection with both the side wall of the annular flange 21 on the side of the pipe body 1 and the inner wall of the pipe body 1. Furthermore, the surface of the annular sealing portion 22 formed above is formed into an arc shape, and one end of the annular sealing portion 22 on the side of the annular flange 21 extends to the inner wall surface of the annular flange 21 and is fixed by hot melt welding.

[0039] A further implementation scheme preferably involves cutting the tube body 1 under circumferential rotation during the aforementioned pre-processing. This removes the inner layer 11 and outer layer 13 material at both ends of the tube body 1, effectively removing excess material from both ends. This allows the middle steel wire reinforcement layer 12 to extend beyond the end face of the cut tube body 1. During the cutting process, the extended portion of the steel wire reinforcement layer 12 is bent inwards radially along the tube body 1 to form a connecting part 121, which then abuts against the inner end face of the cut tube body 1. Because the cutting process is directly controlled, the tube body is cut while rotating circumferentially. This simultaneous cutting and rotation allows the remaining portion of the steel wire reinforcement layer 12 to be bent inwards and abut against the end face of the cut tube body 1, improving processing efficiency and ensuring the remaining length of the steel wire reinforcement layer is sufficient to form the corresponding connecting part 121 structure. Here, the length reserved after cutting should ideally ensure that the inner end of the connecting part 121 formed after bending is within the thickness requirement of the inner layer. In other words, the inner diameter of the connecting part 121 after bending should not exceed the inner wall of the pipe body 1. This can effectively achieve better reinforcement of the inner layer 11 through the connecting parts 121 formed at both ends of the pipe body 1, which is more conducive to improving the interlaminar shear strength performance between them, and can also ensure the bonding strength performance at the connection. This can effectively avoid the phenomenon of reduced bonding force of the intermediate steel wire reinforcement layer 12 due to corrosion caused by penetration during use.

[0040] To maximize the advantages of the protruding structure formed between the inner wall of the annular flange 21 and the inner wall of the pipe body 1, the selection of the pipe end cap 2 initially ensures that half the difference between the inner diameter of the annular flange 21 corresponding to the pipe end cap 1 and the inner diameter of the pipe body 1 is slightly less than the thickness of the inner layer 11 of the pipe body 1. This is equivalent to ensuring that the thickness of the annular flange 21 protruding radially inward from the inner wall of the pipe body 1 is slightly less than the thickness of the inner layer 11, with a difference of 1-2 mm. This ensures that the aforementioned annular sealing portion 22 is effectively formed at the connection point during subsequent extrusion bonding. This is equivalent to increasing the thickness requirement of the connection in the radial direction, which more effectively makes the connection position have a thicker structural design in the radial direction, improving its strength performance. It can also more effectively avoid the problem that the inner steel wire reinforcement layer 12 becomes thinner relative to the inner wall of the pipe due to inward bending. It effectively avoids the corrosion of the inner steel wire reinforcement layer 12 caused by pressure seepage of fluids such as water in the pipe during use, effectively ensuring the overall strength performance of the pipeline, and also avoiding the pollution of fluids such as water in the pipe caused by seepage.

[0041] Example 3

[0042] Combination Figure 3 and Figure 4The end cap structure of the wire mesh pipe in this embodiment is basically the same as that in Embodiment 1, except that the connecting part 121 extends inward to the inner wall surface of the protruding pipe body 1, and one end of the protruding connecting part 121 is embedded between the annular flange 21 and the annular sealing part 22. The rest is the same as the structure in Embodiment 1, and will not be described again here.

[0043] Example 4

[0044] Combination Figure 3 and Figure 4 The sealing processing method of the wire mesh pipe body 1 and the pipe end cap 2 in this embodiment is basically the same as that in embodiment two. The difference is that when the pipe body 1 is pre-processed, the length reserved after cutting can extend out of the inner wall surface of the connecting part 121 formed after bending. After processing, the end of the connecting part 121 that extends inward to the inner wall surface of the pipe body 1 is embedded between the formed annular sealing part 22 and the annular retaining edge 21. Other aspects are basically the same as in embodiment two, and will not be repeated here.

[0045] The specific embodiments described in this invention are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains can make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0046] Although the present invention has been described in detail and specific embodiments have been cited, it will be apparent to those skilled in the art that various changes or modifications can be made without departing from the spirit and scope of the invention.

Claims

1. A sealing structure for a wire mesh pipe, the wire mesh pipe comprising a pipe body (1), the sealing structure comprising a pipe end cap (2), wherein both ends of the pipe body (1) are fitted with the pipe end cap (2) by heat fusion, and one end of the pipe end cap (2) has an annular flange (21) on its inner edge, the annular flange (21) abutting against the end face of the pipe body (1) and fixed by heat fusion connection, characterized in that, The circumferential inner wall of the annular flange (21) protrudes radially inward from the inner wall of the pipe body (1) along the pipe end cap (2). The inner side of the connection between the annular flange (21) and the pipe body (1) has an annular sealing part (22). The annular sealing part (22) is fixed to the side wall of the annular flange (21) on the side of the pipe body (1) and the inner wall of the pipe body (1) by heat fusion connection.

2. The end cap structure of the wire mesh pipe according to claim 1, characterized in that, The tube body (1) includes an inner layer (11), a steel wire reinforcement layer (12) and an outer layer (13) from the inside to the outside. The two ends of the steel wire reinforcement layer (12) extend out of the end face of the inner layer (11). The two ends of the steel wire reinforcement layer (12) are bent inward along the radial direction of the tube body (1) to form a connecting part (121). The connecting part (121) is embedded in the annular flange (21).

3. The end cap structure of the wire mesh pipe according to claim 2, characterized in that, The connecting portion (121) extends inward to the inner wall surface of the inner layer (11), and one end of the connecting portion (121) is embedded between the annular flange (21) and the annular sealing portion (22).

4. A sealing process for a steel wire mesh pipe, characterized in that, The method includes the following steps: A. Select a pre-processed pipe body (1) and a pipe end cap (2) with an annular flange (21) on the inner circumferential edge of one end; when the pipe body (1) and the pipe end cap (2) are combined into one unit, the circumferential inner wall of the annular flange (21) protrudes into the inner wall of the pipe body (1) along the radial direction of the pipe end cap (2); B. Heat and melt the outer peripheral wall and the end faces of the pipe body (1) and the pipe end cap (2) that are heat-fused together; heat and melt the inner wall of the pipe end cap (2) and the end face of the annular flange (21) on the side of the pipe body (1); C. The pipe end cap (2) is squeezed and sleeved with the pipe body (1) so that the end face of the annular flange (21) abuts against the end face of the pipe body (1) and is squeezed and bonded. During the squeeze and bond process, an annular sealing part (22) is formed on the inner side of the connection between the annular flange (21) and the pipe body (1) by heat fusion bonding. After bonding, it is cooled and solidified to obtain the corresponding sealed wire mesh pipe. During the squeeze and bond process, the molten material flows out of the connection between the annular flange (21) and the end face of the pipe body (1) to form the annular sealing part (22). The formed annular sealing part (22) is fixed by heat fusion with the side wall of the annular flange (21) on the side of the pipe body (1) and the inner wall of the pipe body (1).

5. The sealing process of the wire mesh pipe according to claim 4, characterized in that, In the pre-processing process described in step A, the tube body (1) is cut under rotating conditions to remove the inner layer (11) and outer layer (13) materials at both ends of the tube body (1), so that the middle steel wire reinforcement layer (12) extends out of the end face of the cut inner layer (11), and then the part of the steel wire reinforcement layer (12) that extends out is bent inward along the radial direction of the tube body (1) to form a connecting part (121). After the cutting is completed, the connecting part (121) is placed against the end face of the cut inner layer (11).

6. The sealing method for the wire mesh pipe according to claim 4 or 5, characterized in that, When pre-processing the pipe end cap (2) in step A, the difference between half the inner diameter of the annular flange (21) and the inner diameter of the pipe body (1) is slightly less than the inner layer thickness of the pipe body (1).

7. The sealing process of the wire mesh pipe according to claim 5, characterized in that, In step C, the connecting part (121) extends inward to the inner wall surface of the tube body (1), and one end of the connecting part (121) is embedded between the annular flange (21) and the annular sealing part (22).

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