A multi-layer steel wire wound modified polyethylene wear-resistant composite pipe

Abstract

The present invention proposes a multi-layer steel wire-wound modified polyethylene wear-resistant composite pipe, which relates to the technical field of composite pipes. The wear-resistant composite pipe includes a wear-resistant composite pipe body and a connecting assembly; the wear-resistant composite pipe body includes a first wear-resistant composite pipe unit and a second wear-resistant composite pipe unit; the connecting assembly includes a connecting cylinder, both ends of the connecting cylinder are provided with a first annular connecting piece, the first annular connecting piece is arranged on the inner side of the end face of the connecting cylinder, and the end face of the connecting cylinder outside the two first annular connecting pieces is provided with a second annular connecting piece, the two first annular connecting pieces are respectively detachably connected and matched with the inner side of the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit, and the two second annular connecting pieces are respectively detachably connected and matched with the outer side of the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit. The present invention not only increases the stability of the connection between the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit, but also improves the sealing of the connection.

Description

Technical Field

[0001] The invention relates to the technical field of composite pipes, and in particular to a multi-layer steel wire-wound modified polyethylene wear-resistant composite pipe. Background Art

[0002] Composite pipes are based on a composite structure of metal and thermoplastics. They are lined with plastic polypropylene, polyethylene or welded with non-metallic materials such as cross-linked polyethylene. They have the advantages of both metal and non-metallic pipes.

[0003] The multi-layer steel wire-wound modified polyethylene wear-resistant composite pipe is a type of composite pipe. It uses a modified polyethylene core layer as the wear-resistant layer, and a multi-layer interlayer formed by continuously winding high-strength steel wire after coating as the pressure-bearing reinforcement layer. It uses a special bonding factor and modified polyethylene through an internal shaping extrusion molding method to compound it into an integrated pipe. It is suitable for urban water supply, high-rise building water supply, central air-conditioning fresh air system and the transportation of chemical corrosive products below 45 degrees Celsius.

[0004] Multi-layer steel wire-wound modified polyethylene wear-resistant composite pipes are generally composed of multiple sections. Adjacent pipe sections are mostly welded by electric welding, which makes them difficult to connect and has poor sealing performance at the joints. When the pressure inside the pipe is too high, it is easy to cause leakage of the transported fluid.

[0005] In summary, we proposed a multi-layer steel wire-wound modified polyethylene wear-resistant composite pipe to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a multi-layer steel wire wound modified polyethylene wear-resistant composite pipe. The design of the connecting component not only increases the stability of the connection between the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit, but also improves the sealing of the connection. The simple mechanical connection replaces the traditional electrical connection, which is simpler and more convenient.

[0007] The embodiment of the present invention is achieved as follows:

[0008] The embodiment of the present application provides a multi-layer steel wire-wound modified polyethylene wear-resistant composite pipe, including a wear-resistant composite pipe body and a connecting assembly;

[0009] The wear-resistant composite pipe body includes a first wear-resistant composite pipe unit, and also includes a second wear-resistant composite pipe unit connected to the first wear-resistant composite pipe unit, and the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit have the same structure;

[0010] The above-mentioned connecting assembly includes a connecting cylinder, which is arranged between the above-mentioned first wear-resistant composite pipe unit and the above-mentioned second wear-resistant composite pipe unit. Both ends of the above-mentioned connecting cylinder are provided with a first annular connecting piece coaxial therewith, and the above-mentioned first annular connecting piece is arranged on the inner side of the end face of the above-mentioned connecting cylinder, and the end face of the above-mentioned connecting cylinder outside the two above-mentioned first annular connecting pieces is provided with a second annular connecting piece, and the above-mentioned second annular connecting piece is concentrically arranged with the above-mentioned first annular connecting piece, and the two above-mentioned first annular connecting pieces are respectively detachably connected and matched with the inner sides of the above-mentioned first wear-resistant composite pipe unit and the above-mentioned second wear-resistant composite pipe unit, and the two above-mentioned second annular connecting pieces are respectively detachably connected and matched with the outer sides of the above-mentioned first wear-resistant composite pipe unit and the above-mentioned second wear-resistant composite pipe unit.

[0011] In some embodiments of the present invention, the first wear-resistant composite pipe unit comprises a first modified polyethylene layer, a multi-layer steel mesh fixing layer is arranged outside the first modified polyethylene layer, and a second modified polyethylene layer is arranged outside the steel mesh fixing layer.

[0012] In some embodiments of the present invention, the distance between the outer side of the first annular connecting piece and the inner side of the second annular connecting piece is greater than the thickness of the first wear-resistant composite pipe unit.

[0013] In some embodiments of the present invention, the outer side of the first annular connecting piece is provided with an external thread, and the inner side of the first wear-resistant composite pipe unit is provided with an internal thread that matches the external thread of the first annular connecting piece;

[0014] The inner side of the second annular connecting piece is provided with an internal thread, and the outer side of the first wear-resistant composite pipe unit is provided with an external thread that matches the internal thread of the second annular connecting piece.

[0015] In some embodiments of the present invention, the outer diameter of the connecting cylinder is larger than the outer diameter of the first wear-resistant composite pipe unit, and the end surface of the connecting cylinder is provided with an annular groove for accommodating the second annular connecting plate, and the annular groove is provided with an external thread that cooperates with the internal thread of the second annular connecting plate.

[0016] In some embodiments of the present invention, the connecting cylinder is provided with an arc groove connected to the annular groove, and the number of the arc grooves is multiple, and the multiple arc grooves are evenly spaced along the circumferential direction of the connecting cylinder;

[0017] A plurality of adjustment grooves are provided on the outer circumference of the second annular connecting piece. The plurality of adjustment grooves form adjustment units. There are a plurality of adjustment units, and the plurality of adjustment units are spaced apart and distributed along the axial direction of the second annular connecting piece.

[0018] In some embodiments of the present invention, both end surfaces of the connecting cylinder are provided with a first annular reinforcement groove, the ring side of the connecting cylinder is provided with a main flow groove, the main flow groove is connected to two secondary flow grooves, and the two secondary flow grooves are respectively connected to the two first annular reinforcement grooves;

[0019] The main flow channel is detachably provided with a sealing plug.

[0020] In some embodiments of the present invention, the main flow channel is provided with an internal thread, and the sealing plug is a threaded plug.

[0021] In some embodiments of the present invention, a second annular reinforcement groove is provided on the end surface of the connecting cylinder inside the first annular reinforcement groove, and a third annular reinforcement groove is provided on the end surface of the connecting cylinder inside the second annular reinforcement groove;

[0022] The first annular reinforcement groove and the second annular reinforcement groove, and the second annular reinforcement groove and the third annular reinforcement groove are communicated with each other through a first channel and a second channel respectively.

[0023] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0024] A multi-layer steel wire-wound modified polyethylene wear-resistant composite pipe, comprising a wear-resistant composite pipe body and a connecting assembly; the wear-resistant composite pipe body comprises a first wear-resistant composite pipe unit, and also comprises a second wear-resistant composite pipe unit docked with the first wear-resistant composite pipe unit, and the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit have the same structure; the connecting assembly comprises a connecting cylinder, the connecting cylinder is arranged between the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit, both ends of the connecting cylinder are provided with a first annular connecting piece coaxial therewith, the first annular connecting piece is arranged on the inner side of the end face of the connecting cylinder, the end face of the connecting cylinder outside the two first annular connecting pieces are provided with a second annular connecting piece, the second annular connecting piece and the first annular connecting piece are arranged concentrically, the two first annular connecting pieces are respectively detachably connected and matched with the inner sides of the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit, and the two second annular connecting pieces are respectively detachably connected and matched with the outer sides of the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit.

[0025] In the present invention, the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit are coaxially connected, and the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit are spaced apart, so that the connecting cylinder is placed between the gap between the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit, and the two first annular connecting pieces are respectively connected to the inner cavities of the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit to achieve the initial connection of the first wear-resistant composite pipe unit, the connecting cylinder and the second wear-resistant composite pipe unit; and then the two second annular connecting pieces are respectively connected to the outer sides of the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit. In the above embodiment, the two first annular connecting pieces not only realize the connection between the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit, but also realize the sealing of the connection between the first wear-resistant composite pipe unit and the connecting cylinder, and the sealing between the second wear-resistant composite pipe unit and the connecting cylinder, thereby improving the sealing performance of the joint, and the two second annular connecting pieces further realize the re-sealing reinforcement of the connection between the first wear-resistant composite pipe unit and the connecting cylinder, and the connection between the second wear-resistant composite pipe unit and the connecting cylinder, thereby improving the stability of the docking between the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit, and the sealing of the connection. The traditional electrical connection is replaced by a simple mechanical connection, which is simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is a schematic structural diagram of a multi-layer steel wire-wound modified polyethylene wear-resistant composite pipe according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 A partial enlarged view of middle A;

[0029] Figure 3 for Figure 1 A partial enlarged view of B in the middle;

[0030] Figure 4 It is a schematic structural diagram of the first wear-resistant composite pipe unit according to an embodiment of the present invention.

[0031] Icons: 1-first wear-resistant composite pipe unit, 101-second modified polyethylene layer, 102-wire mesh fixing layer, 103-first modified polyethylene layer, 104-composite bonding factor, 2-second wear-resistant composite pipe unit, 3-first annular connecting plate, 4-arc groove, 5-annular groove, 6-sealing plug, 7-second annular connecting plate, 8-connecting cylinder, 9-first annular reinforcement groove, 10-second annular reinforcement groove, 11-third annular reinforcement groove, 12-secondary guide groove, 13-first channel, 14-second channel, 15-adjusting groove. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the embodiments of the present invention, "plurality" means at least 2.

[0038] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Example

[0040] Please refer to Figure 1-Figure 4 , this embodiment provides a multi-layer steel wire-wound modified polyethylene wear-resistant composite pipe, including a wear-resistant composite pipe body and a connecting assembly;

[0041] The wear-resistant composite pipe body includes a first wear-resistant composite pipe unit 1, and also includes a second wear-resistant composite pipe unit 2 connected to the first wear-resistant composite pipe unit 1. The first wear-resistant composite pipe unit 1 and the second wear-resistant composite pipe unit 2 have the same structure.

[0042] The above-mentioned connecting assembly includes a connecting cylinder 8, which is arranged between the above-mentioned first wear-resistant composite pipe unit 1 and the above-mentioned second wear-resistant composite pipe unit 2. Both ends of the above-mentioned connecting cylinder 8 are provided with a first annular connecting piece 3 coaxial therewith, and the above-mentioned first annular connecting piece 3 is arranged on the inner side of the end face of the above-mentioned connecting cylinder 8. The end face of the above-mentioned connecting cylinder 8 outside the two above-mentioned first annular connecting pieces 3 is provided with a second annular connecting piece 7. The above-mentioned second annular connecting piece 7 is concentrically arranged with the above-mentioned first annular connecting piece 3. The two above-mentioned first annular connecting pieces 3 are respectively detachably connected and matched with the inner sides of the above-mentioned first wear-resistant composite pipe unit 1 and the above-mentioned second wear-resistant composite pipe unit 2, and the two above-mentioned second annular connecting pieces 7 are respectively detachably connected and matched with the outer sides of the above-mentioned first wear-resistant composite pipe unit 1 and the above-mentioned second wear-resistant composite pipe unit 2.

[0043] In the present invention, the first wear-resistant composite pipe unit 1 and the second wear-resistant composite pipe unit 2 are coaxially connected, and the first wear-resistant composite pipe unit 1 and the second wear-resistant composite pipe unit 2 are arranged at intervals, so that the connecting cylinder 8 is placed between the gap between the first wear-resistant composite pipe unit 1 and the second wear-resistant composite pipe unit 2, and the two first annular connecting pieces 3 are respectively connected to the inner cavities of the first wear-resistant composite pipe unit 1 and the second wear-resistant composite pipe unit 2 to achieve the initial connection of the first wear-resistant composite pipe unit 1, the connecting cylinder 8 and the second wear-resistant composite pipe unit 2; and then the two second annular connecting pieces 7 are respectively connected to the outer sides of the first wear-resistant composite pipe unit 1 and the second wear-resistant composite pipe unit 2. In the above embodiment, the two first annular connecting pieces 3 not only realize the connection between the first wear-resistant composite pipe unit 1 and the second wear-resistant composite pipe unit 2, but also realize the sealing of the connection between the first wear-resistant composite pipe unit 1 and the connecting cylinder 8, and the sealing between the second wear-resistant composite pipe unit 2 and the connecting cylinder 8, thereby improving the sealing performance of the joint, and the two second annular connecting pieces 7 further realize the re-sealing reinforcement of the connection between the first wear-resistant composite pipe unit 1 and the connecting cylinder 8, and the connection between the second wear-resistant composite pipe unit 2 and the connecting cylinder 8, thereby improving the stability of the docking of the first wear-resistant composite pipe unit 1 and the second wear-resistant composite pipe unit 2, and the sealing of the connection. The traditional electrical connection is replaced by a simple mechanical connection, which is simpler and more convenient.

[0044] In some embodiments of the present invention, the first wear-resistant composite pipe unit 1 comprises a first modified polyethylene layer 103 , a multi-layer steel mesh fixing layer 102 is disposed outside the first modified polyethylene layer 103 , and a second modified polyethylene layer 101 is disposed outside the steel mesh fixing layer 102 .

[0045] In the above embodiment, the steel mesh fixing layer 102 and the first modified polyethylene layer 103, adjacent steel mesh fixing layers 102, and the steel mesh fixing layer 102 and the second modified polyethylene layer 101 are connected by a composite bonding factor 104 to enhance the stability of the overall structure.

[0046] In some embodiments of the present invention, the distance between the outer side of the first annular connecting piece 3 and the inner side of the second annular connecting piece 7 is greater than the thickness of the first wear-resistant composite pipe unit 1 .

[0047] In the above embodiment, since the distance between the outer side of the first annular connecting sheet 3 and the inner side of the second annular connecting sheet 7 is greater than the thickness of the first wear-resistant composite pipe unit 1, the first wear-resistant composite pipe unit 1 can be inserted between the first annular connecting sheet 3 and the second annular connecting sheet 7. Under the double connection effect of the first annular connecting sheet 3 and the second annular connecting sheet 7, the stability of the docking of the first wear-resistant composite pipe unit 1 and the second wear-resistant composite pipe unit 2 is improved.

[0048] In some embodiments of the present invention, the outer side of the first annular connecting piece 3 is provided with an external thread, and the inner side of the first wear-resistant composite pipe unit 1 is provided with an internal thread that matches the external thread of the first annular connecting piece 3;

[0049] The inner side of the second annular connecting piece 7 is provided with an internal thread, and the outer side of the first wear-resistant composite pipe unit 1 is provided with an external thread that matches the internal thread of the second annular connecting piece 7 .

[0050] In the above embodiment, the first annular connecting plate 3 and the second annular connecting plate 7 are connected to the first wear-resistant composite pipe unit 1 by means of threads, which has the advantages of fast connection and good connection sealing performance, replaces the traditional electric-iron connection method, and avoids the processes of wiring, equipment preparation, etc. in the electric-iron connection method. The mechanical connection method of the present invention is simpler and more convenient.

[0051] In some embodiments of the present invention, the outer diameter of the connecting cylinder 8 is larger than the outer diameter of the first wear-resistant composite pipe unit, and the end face of the connecting cylinder 8 is provided with an annular groove 5 for accommodating the second annular connecting piece 7, and the annular groove 5 is provided with an external thread that cooperates with the internal thread of the second annular connecting piece 7.

[0052] In the above embodiment, the second annular connecting piece 7 can be received in the annular groove 5, realizing a hidden design of the second annular connecting piece 7, so that when the first annular connecting piece 3 is installed (for the first annular connecting piece 3 and the second annular connecting piece 7 on the same side), the second annular connecting piece 7 will not produce a blocking effect, and the second annular connecting piece 7 can be installed after the first annular connecting piece 3 is installed.

[0053] In some embodiments of the present invention, the connecting cylinder 8 is provided with an arc groove 4 connected to the annular groove 5, and the number of the arc grooves 4 is multiple, and the multiple arc grooves 4 are evenly spaced along the circumferential direction of the connecting cylinder 8;

[0054] A plurality of adjustment grooves 15 are provided on the outer circumference of the second annular connecting piece 7 . The plurality of adjustment grooves 15 form an adjustment unit. There are a plurality of adjustment units, which are spaced apart and distributed along the axial direction of the second annular connecting piece 7 .

[0055] In the above embodiment, the arc groove 4 is used to toggle the adjustment groove 15 to drive the second annular connecting piece 7 to rotate, so that the second annular connecting piece 7 can be easily rotated and adjusted to achieve the threaded connection between the first wear-resistant composite pipe unit 1 and the connecting cylinder 8.

[0056] In some embodiments of the present invention, both end surfaces of the connecting cylinder 8 are provided with a first annular reinforcement groove 9, and the ring side of the connecting cylinder 8 is provided with a main flow groove, and the main flow groove is connected to two secondary flow grooves 12, and the two secondary flow grooves 12 are respectively connected to the two first annular reinforcement grooves 9;

[0057] The main flow channel is detachably provided with a sealing plug 6.

[0058] In the above embodiment, by removing the sealing cover, glue is poured into the main guide groove, and the glue flows to the first annular reinforcement groove 9 through the secondary guide groove 12 to achieve glue sealing at the joint between the first wear-resistant composite pipe unit 1 and the connecting cylinder 8, further improving the connection stability.

[0059] In some embodiments of the present invention, the main flow channel is provided with an internal thread, and the sealing plug 6 is a threaded plug.

[0060] In some embodiments of the present invention, a second annular reinforcement groove 10 is provided on the end surface of the connecting cylinder 8 inside the first annular reinforcement groove 9, and a third annular reinforcement groove 11 is provided on the end surface of the connecting cylinder 8 inside the second annular reinforcement groove 10;

[0061] The first annular reinforcement groove 9 and the second annular reinforcement groove 10 , and the second annular reinforcement groove 10 and the third annular reinforcement groove 11 are communicated with each other through a first channel 13 and a second channel 14 , respectively.

[0062] In the above embodiment, the glue can fill the first annular reinforcement groove 9, the second annular reinforcement groove 10 and the third annular reinforcement groove 11 respectively through the main guide groove, the secondary guide groove 12, the first channel 13 and the second channel 14, thereby realizing multi-point sealing at the joint between the first wear-resistant composite pipe unit 1 and the connecting cylinder 8, and further improving the stability of the connection between the two.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-layer steel wire-wound modified polyethylene wear-resistant composite pipe, It is characterized in that It includes a wear-resistant composite pipe body and a connecting component; The wear-resistant composite pipe body includes a first wear-resistant composite pipe unit, and also includes a second wear-resistant composite pipe unit connected to the first wear-resistant composite pipe unit, and the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit have the same structure; The connecting assembly includes a connecting cylinder, which is arranged between the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit. Both ends of the connecting cylinder are provided with a first annular connecting piece coaxial therewith, the first annular connecting piece is arranged on the inner side of the end face of the connecting cylinder, and the end face of the connecting cylinder outside the two first annular connecting pieces is provided with a second annular connecting piece, the second annular connecting piece and the first annular connecting piece are arranged concentrically, the two first annular connecting pieces are respectively detachably connected and matched with the inner side of the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit, and the two second annular connecting pieces are respectively detachably connected and matched with the outer side of the first wear-resistant composite pipe unit and the second wear-resistant composite pipe unit; The first annular connecting piece is provided with an external thread on the outside, and the first wear-resistant composite pipe unit is provided with an internal thread on the inside to match the external thread of the first annular connecting piece; the second annular connecting piece is provided with an internal thread on the inside, and the first wear-resistant composite pipe unit is provided with an external thread on the outside to match the internal thread of the second annular connecting piece; The outer diameter of the connecting cylinder is larger than the outer diameter of the first wear-resistant composite pipe unit, and the end surface of the connecting cylinder is provided with an annular groove for accommodating the second annular connecting piece, and the annular groove is provided with an external thread that matches the internal thread of the second annular connecting piece; The connecting cylinder is provided with an arc groove connected to the annular groove, and there are multiple arc grooves, which are evenly spaced along the circumferential direction of the connecting cylinder; the outer circumference of the second annular connecting piece is provided with multiple adjustment grooves, and the multiple adjustment grooves form adjustment units, and there are multiple adjustment units, which are spaced along the axial direction of the second annular connecting piece.

2. A multi-layer steel wire wound modified polyethylene wear-resistant composite pipe according to claim 1, It is characterized in that The first wear-resistant composite pipe unit comprises a first modified polyethylene layer, a multi-layer steel mesh fixing layer is arranged on the outer side of the first modified polyethylene layer, and a second modified polyethylene layer is arranged on the outer side of the steel mesh fixing layer.

3. The multi-layer steel wire-wound modified polyethylene wear-resistant composite pipe according to claim 1, It is characterized in that The distance between the outer side of the first annular connecting piece and the inner side of the second annular connecting piece is greater than the thickness of the first wear-resistant composite pipe unit.

4. The multi-layer steel wire wound modified polyethylene wear-resistant composite pipe according to claim 1, It is characterized in that The two end surfaces of the connecting cylinder are both provided with a first annular reinforcement groove, the annular side of the connecting cylinder is provided with a main flow groove, the main flow groove is connected with two secondary flow grooves, and the two secondary flow grooves are respectively connected with the two first annular reinforcement grooves; The main flow channel is detachably provided with a sealing plug.

5. The multi-layer steel wire wound modified polyethylene wear-resistant composite pipe according to claim 4, It is characterized in that The main flow channel is provided with an internal thread, and the sealing plug is a threaded plug.

6. The multi-layer steel wire-wound modified polyethylene wear-resistant composite pipe according to claim 5, It is characterized in that A second annular reinforcement groove is provided on the end surface of the connecting cylinder inside the first annular reinforcement groove, and a third annular reinforcement groove is provided on the end surface of the connecting cylinder inside the second annular reinforcement groove; The first annular reinforcement groove and the second annular reinforcement groove, and the second annular reinforcement groove and the third annular reinforcement groove are communicated with each other through a first channel and a second channel respectively.

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