Steel wire mesh framework polyethylene composite pipe connecting structure and connecting method
Through the flaring and curling technology of wire mesh skeleton polyethylene composite pipe and the coordination of the inner core, outer sleeve, steel ring and sealing gasket, the problem of waste of resources and insufficient pressure bearing capacity during connection is solved, a tight and stable connection is achieved, and the circulation capacity and recyclable of the pipe is ensured.
Patent Information
- Application Number
- CN202510226843.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2025-06-06
AI Technical Summary
The wire mesh skeleton polyethylene composite pipes have problems of wasted resources and insufficient pressure bearing capacity when connecting. The traditional connection method requires sealing and is not convenient for reuse.
By flaring the pipe and cooperating with the inner core, outer sleeve, steel ring and sealing gasket, a connecting structure without melting and glueing is achieved. It can be detached and recycled, ensuring the consistency of the inner diameter of the pipe and the circulation capacity.
The tight and stable connection of the wire mesh skeleton polyethylene composite pipe is achieved, which avoids waste of resources, ensures pressure-bearing performance and circulation capacity, and solves the complexity of sealing treatment in traditional connection methods.
Smart Images
Figure CN120100971A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of pipeline connection, and in particular relates to a steel wire mesh skeleton polyethylene composite pipe connection structure and a connection method. Background Art
[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.
[0003] At present, the composite layer of the wire mesh skeleton polyethylene composite pipe is the main pressure-bearing structure. If it is in direct contact with the medium, its pressure-bearing performance will be affected. Therefore, there are generally two solutions to avoid the contact between the composite layer and the medium for the wire mesh skeleton polyethylene composite pipe. One is to use a sealing ring to seal the end face, and the other is to flanging the pipe so that the end face of the pipe does not contact the medium.
[0004] When the wire mesh skeleton polyethylene composite pipe involves the adjustment of the pipe length, the auxiliary connecting parts at the connection method cannot be reused after the pipe is cut, resulting in a certain waste of resources; some connections of the wire mesh skeleton polyethylene composite pipe need to be crimped with iron sheets, and the crimping depth is too shallow, which affects the pressure-bearing capacity of the pipe connection. Therefore, the actual crimping depth is generally deeper, but it will affect the flow diameter of the pipe. Summary of the invention
[0005] In view of the above problems, the present invention provides a wire mesh skeleton polyethylene composite pipe connection structure and a connection method. The problem that the traditional connection method requires sealing of the pipe end face is solved by expanding and curling the pipe and cooperating with an inner core, an outer ferrule, a steel ring and a sealing gasket. The compression method eliminates the need to melt and glue the pipe, and the connection structure can be disassembled and recycled. At the same time, the consistency of the inner diameter of the pipe is ensured without affecting the flow capacity of the pipeline.
[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:
[0007] In the first aspect, the present invention provides a wire mesh skeleton polyethylene composite pipe connection structure, comprising: an outer sleeve, an inner core, a steel ring and a sealing gasket; the ends of two adjacent polyethylene composite pipes are each provided with a hollow annular structure that wraps the steel ring, the steel ring is arranged in the hollow annular structure, and the sealing gasket is arranged between the two adjacent hollow annular structures; the inner core is annular, and there are two inner cores, which are respectively sleeved on the end of each polyethylene composite pipe and are located on the side of the hollow annular structure away from the sealing gasket; the cross-section of the inner core is a right-angled trapezoid, and the vertical side surface of the inner core is provided with an arc groove for clamping the steel ring; the outer sleeve is arranged on the outside of the two inner cores, and the trapezoidal inclined surface of the inner core is in contact with the outer sleeve, which is used to clamp the two inner cores.
[0008] Furthermore, the polyethylene composite pipe is composed of a polyethylene inner layer, a hot melt adhesive layer, a steel wire reinforcement layer, and a polyethylene outer layer; the polyethylene inner layer is arranged at the innermost layer, which is used to directly contact the transported medium, a hot melt adhesive layer is arranged on the outside of the polyethylene inner layer, and a steel wire reinforcement layer is arranged on the outside of the hot melt adhesive layer, which is used to improve the pressure bearing capacity of the polyethylene composite pipe, a hot melt adhesive layer is also arranged on the outside of the steel wire reinforcement layer, and the hot melt adhesive layer is used to fix the steel wire reinforcement layer, and the outermost layer of the polyethylene composite pipe is the polyethylene outer layer, which is used to directly contact the outside and improve the corrosion resistance and heat resistance of the polyethylene composite pipe.
[0009] Furthermore, the steel wire reinforcement layer is a steel wire mesh structure composed of a plurality of steel wires, which ensures that the steel wires are evenly distributed in the polyethylene composite pipe.
[0010] Furthermore, the hollow annular structure is formed by expanding and curling the end of the polyethylene composite pipe.
[0011] Furthermore, the inner surface of the hollow annular structure is a polyethylene outer layer, and the outer surface of the hollow annular structure is a polyethylene inner layer.
[0012] Furthermore, the polyethylene inner layer is in contact with the sealing gasket, and the steel ring is in contact with the polyethylene outer layer.
[0013] Furthermore, the radius of the arc-shaped groove is the same as the radius of the hollow annular structure.
[0014] Furthermore, the outer clamp is composed of a first clamp half circle and a second clamp half circle, and the first clamp half circle and the second clamp half circle are arranged in axisymmetry.
[0015] Further, a first fastening groove is provided inside the first clamp half circle, the cross section of the first fastening groove is a trapezoidal structure and the opening is the lower bottom side of the trapezoid; a second fastening groove is provided inside the second clamp half circle, the cross section of the second fastening groove is a trapezoidal structure and the opening is the lower bottom side of the trapezoid; connecting seats are provided at both ends of the first clamp half circle and the second clamp half circle, and a connecting piece is provided on the connecting seat for clamping the first clamp half circle and the second clamp half circle;
[0016] The inclined surfaces on both sides of the first fastening groove and the second fastening groove are in contact with the trapezoidal inclined surfaces of the two inner cores respectively.
[0017] In a second aspect, the present invention further provides a connection method of a steel wire mesh skeleton polyethylene composite pipe connection structure, comprising the following steps:
[0018] S1. First, the two inner cores are respectively put on the ends of two adjacent polyethylene composite pipes, and then the two steel rings are respectively put on the ends of two adjacent polyethylene composite pipes, and the ends of the polyethylene composite pipes are expanded. When expanding, the ends are curled to form a hollow ring structure, and the steel rings are rolled into the hollow ring structure in time;
[0019] S2. Install the gasket, the polyethylene inner layer is in contact with the gasket, the inner core arc groove is stuck on the hollow annular structure, and the inner core arc groove and the hollow annular structure are limited;
[0020] S3. The first clamp half circle and the second clamp half circle of the outer clamp sleeve are respectively put on the trapezoidal inclined surfaces of the two inner cores at the ends of two adjacent polyethylene composite pipes, and clamped by the connecting piece on the connecting seat, thereby tightly connecting the two adjacent polyethylene composite pipes.
[0021] Compared with the prior art, the present invention has the following advantages and positive effects:
[0022] The connection method of the connection structure of the present invention is to make the adjacent polyethylene composite pipes tightly and firmly connected through the cooperation of the inner core, the outer ferrule, the steel ring and the sealing gasket, and at the same time, there is no need to perform end face sealing treatment. For the traditional connection method, the steel wire mesh skeleton polyethylene composite pipe will use a specific tool to melt and seal the pipe end face to prevent the composite layer from contacting the medium and causing the pipe to fail under pressure. In the present invention, the inner core sealing structure is used to prevent the medium from contacting the pipe end face, and no end face sealing treatment is required. At the same time, it also solves the problem that the steel wire mesh skeleton polyethylene composite pipe is not firmly connected and is prone to being pulled out or loosened under pressure, thereby ensuring the reliability of the connection; by setting a hollow annular structure, the inner surfaces of adjacent pipes are directly contacted, and through the special structural design of the outer ferrule and the inner core, the trapezoidal slope of the inner core can be effectively squeezed, and the radial force is converted into axial force to achieve end compression. In this process, there is no need to melt and glue the pipe, so that the connection structure can be disassembled and recycled.
[0023] The multi-layer structure design of the polyethylene composite pipe of the present invention has a polyethylene inner layer in contact with the medium, an outer layer that is corrosion-resistant and heat-resistant, an intermediate steel wire reinforcement layer that improves the pressure-bearing capacity, and a hot-melt adhesive layer that fixes the steel wire reinforcement layer to avoid relative movement, thereby improving the overall performance of the pipe; the steel wire reinforcement layer has a wire mesh structure composed of multiple steel wires, thereby avoiding the problem of local pressure-bearing capacity reduction caused by uneven distribution of steel wires, and the steel wire mesh structure of the steel wire reinforcement layer ensures uniform distribution of the steel wires. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.
[0025] Figure 1 It is a connection structure diagram of the present invention;
[0026] Figure 2 It is an axial view of the outer sleeve structure of the present invention;
[0027] Figure 3 It is a radial cross-sectional view of the inner core structure of the present invention.
[0028] In the figure: 1. outer ferrule; 2. inner core; 3. steel ring; 4. sealing gasket; 5. polyethylene composite pipe; 6. connecting seat; 7. connecting piece; 8. arc groove; 9. trapezoidal inclined surface; 10. vertical side surface. DETAILED DESCRIPTION
[0029] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.
[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;
[0031] This embodiment discloses a steel wire mesh skeleton polyethylene composite pipe connection structure, such as Figure 1-Figure 3 As shown, it includes an outer sleeve 1, an inner core 2, a steel ring 3 and a sealing gasket 4; the ends of the two adjacent polyethylene composite pipes 5 are each provided with a hollow annular structure that wraps the steel ring 3, the steel ring 3 is arranged in the hollow annular structure, and the sealing gasket 4 is arranged between the two adjacent hollow annular structures; the inner core 2 is annular, and there are two inner cores 2, which are respectively sleeved on the end of each polyethylene composite pipe 5 and are located on the side of the hollow annular structure away from the sealing gasket 4; the cross-section of the inner core 2 is a right-angled trapezoid, and the vertical side surface 10 of the inner core 2 is provided with an arc groove 8 for clamping the steel ring 3; the outer sleeve 1 is arranged on the outside of the two inner cores 2, and the trapezoidal slope 9 of the inner core 2 is in contact with the outer sleeve 1, which is used to clamp the two inner cores 2.
[0032] The polyethylene composite pipe 5 is composed of a polyethylene inner layer, a hot melt adhesive layer, a steel wire reinforcement layer, and a polyethylene outer layer; the polyethylene inner layer is arranged as the innermost layer, and is used to directly contact the medium being transported; a hot melt adhesive layer is arranged on the outer side of the polyethylene inner layer; a steel wire reinforcement layer is arranged on the outer side of the hot melt adhesive layer, and is used to improve the pressure bearing capacity of the polyethylene composite pipe 5; a hot melt adhesive layer is also arranged on the outer side of the steel wire reinforcement layer, and the hot melt adhesive layer is used to fix the steel wire reinforcement layer, and the relative movement of the steel wire reinforcement layer and the polyethylene layer is avoided during use; the outermost layer of the polyethylene composite pipe 5 is the polyethylene outer layer, and is used to directly contact the outside world, and has strong corrosion resistance and heat resistance. The steel wire reinforcement layer is a steel wire mesh structure composed of multiple steel wires, which ensures that the steel wires are evenly distributed in the polyethylene composite pipe 5, and can avoid the local steel wires being too sparse, resulting in a decrease in the pressure bearing capacity of the polyethylene composite pipe 5.
[0033] The end of the polyethylene composite pipe 5 is a hollow annular structure, and the steel ring 3 is arranged inside the hollow annular structure; the steel ring 3 is in contact with the polyethylene outer layer, and the polyethylene inner layer is in contact with the sealing gasket 4; the end of the polyethylene composite pipe 5 is expanded by a expanding mold, and the steel ring 3 and the inner core 2 need to be put on the outside of the pipe in advance before expanding. The end of the polyethylene composite pipe 5 will curl during expansion and eventually roll into a hollow annular structure. During expansion, the steel ring 3 needs to be rolled into the hollow annular structure after expansion and curling in time. At this time, the inner surface of the hollow annular structure is the polyethylene outer layer, and the outer surface of the hollow annular structure is the polyethylene inner layer; for the steel wire mesh skeleton polyethylene composite pipe 5, in order to prevent the composite layer from contacting the medium and causing the pipe to fail under pressure, a specific tooling will be used to melt and seal the end face of the pipe. In the present invention, since the surface of the polyethylene inner layer is relatively flat and directly contacts the sealing gasket 4, there is no need to seal the end face of the polyethylene composite pipe 5.
[0034] The inner core 2 and the outer sleeve 1 are both made of metal. The arc groove 8 is arranged on the vertical side 10 on the inner core 2. The radius of the arc groove 8 is the same as the radius of the hollow annular structure. During the connection of the polyethylene composite pipe 5, the arc groove 8 of the inner core 2 is clamped on the hollow annular structure to form a limiting effect.
[0035] The outer clamp 1 is composed of a first clamp half circle and a second clamp half circle, and the first clamp half circle and the second clamp half circle are arranged axially symmetrically; a first fastening groove is arranged inside the first clamp half circle, and the cross-section of the first fastening groove is a trapezoidal structure and the opening is the lower bottom edge of the trapezoid; a second fastening groove is arranged inside the second clamp half circle, and the cross-section of the second fastening groove is a trapezoidal structure and the opening is the lower bottom edge of the trapezoid; connecting seats 6 are respectively arranged at both ends of the first clamp half circle and the second clamp half circle, and a connecting piece 7 is arranged on the connecting seat 6 for clamping the first clamp half circle and the second clamp half circle; the inclined surfaces on both sides of the first fastening groove and the second fastening groove are divided into The inner core 2 is not in contact with the trapezoidal slope 9 of the inner core 2 at the end of the adjacent polyethylene composite pipe 5. When the first clamp half circle and the second clamp half circle are clamped, the trapezoidal slope 9 of the inner core 2 is squeezed by the slopes on both sides of the first fastening groove and the second fastening groove, and the adjacent polyethylene composite pipes 5 are pushed to be tightly combined through the arc groove 8 on the inner core 2. After the polyethylene composite pipe 5 is expanded and flanging itself, the steel ring 3 is used to extrude the inner core 2 to form a fastening structure, so that the pipe cannot be withdrawn when under pressure. The radial force is converted into an axial force, and the end of the polyethylene composite pipe 5 can be compressed without providing an axial force. At the same time, it also ensures that the inner diameter of the pipe is consistent and does not affect the flow capacity of the pipeline.
[0036] Working method:
[0037] S1. First, the two inner cores 2 are respectively put on the ends of two adjacent polyethylene composite pipes 5, and then the two steel rings 3 are respectively put on the ends of two adjacent polyethylene composite pipes 5, and the ends of the polyethylene composite pipes 5 are expanded. When expanding, the ends are curled to form a hollow ring structure, and the steel ring 3 is rolled into the hollow ring structure in time; after curling, the inner surface of the hollow ring structure is the polyethylene outer layer, and the outer surface is the polyethylene inner layer, and the steel ring 3 is in contact with the polyethylene outer layer;
[0038] S2. Install the sealing gasket 4, the polyethylene inner layer contacts the sealing gasket 4, and the arc groove 8 of the inner core 2 is clamped on the hollow annular structure, so that the arc groove 8 of the inner core 2 and the hollow annular structure form a limit.
[0039] S3. The first clamp half circle and the second clamp half circle of the outer clamp 1 are respectively put on the inner core 2 at the ends of two adjacent polyethylene composite pipes 5, and clamped by the connector 7 on the connecting seat 6; during the clamping process, the first fastening groove inside the first clamp half circle and the second fastening groove inside the second clamp half circle are in contact with the trapezoidal inclined surface 9 of the inner core 2 at the ends of the adjacent polyethylene composite pipes 5, and the radial force is converted into axial force by squeezing the trapezoidal inclined surface 9 of the inner core 2 by the inclined surface, and the adjacent polyethylene composite pipes 5 are pushed to be tightly combined through the arc groove 8 of the inner core 2, and the steel ring 3 and the inner core 2 are squeezed by the expansion and flanging of the pipe itself to form a fastening structure, so that the pipe cannot be withdrawn when under pressure.
[0040] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.
Claims
1. A steel wire mesh skeleton polyethylene composite pipe connection structure, characterized in that: include: An outer sleeve, an inner core, a steel ring and a sealing gasket; the ends of two adjacent polyethylene composite pipes are each provided with a hollow annular structure that wraps the steel ring, the steel ring is arranged in the hollow annular structure, and the sealing gasket is arranged between two adjacent hollow annular structures; the inner core is annular, there are two inner cores, which are respectively sleeved on the end of each polyethylene composite pipe and are located on the side of the hollow annular structure away from the sealing gasket; the cross-section of the inner core is a right-angled trapezoid, and the vertical side of the inner core is provided with an arc groove for clamping the steel ring; the outer sleeve is arranged on the outside of the two inner cores, and the trapezoidal inclined surface of the inner core is in contact with the outer sleeve, which is used to clamp the two inner cores.
2. A steel wire mesh skeleton polyethylene composite pipe connection structure as claimed in claim 1, characterized in that: The polyethylene composite pipe consists of a polyethylene inner layer, a hot melt adhesive layer, a steel wire reinforcement layer, and a polyethylene outer layer; the polyethylene inner layer is arranged as the innermost layer, which is used to directly contact the transported medium, a hot melt adhesive layer is arranged on the outer side of the polyethylene inner layer, a steel wire reinforcement layer is arranged on the outer side of the hot melt adhesive layer, which is used to improve the pressure bearing capacity of the polyethylene composite pipe, a hot melt adhesive layer is also arranged on the outer side of the steel wire reinforcement layer, and the hot melt adhesive layer is used to fix the steel wire reinforcement layer, and the outermost layer of the polyethylene composite pipe is the polyethylene outer layer, which is used to directly contact the outside world and improve the corrosion resistance and heat resistance of the polyethylene composite pipe.
3. A steel wire mesh skeleton polyethylene composite pipe connection structure as claimed in claim 2, characterized in that: The steel wire reinforcement layer is a steel wire mesh structure composed of a plurality of steel wires, which ensures that the steel wires are evenly distributed in the polyethylene composite pipe.
4. A steel wire mesh skeleton polyethylene composite pipe connection structure as claimed in claim 1, characterized in that: The hollow annular structure is formed by expanding and curling the end of the polyethylene composite pipe.
5. A steel wire mesh skeleton polyethylene composite pipe connection structure as claimed in claim 4, characterized in that: The inner surface of the hollow annular structure is a polyethylene outer layer, and the outer surface of the hollow annular structure is a polyethylene inner layer.
6. A steel wire mesh skeleton polyethylene composite pipe connection structure as claimed in claim 5, characterized in that: The polyethylene inner layer is in contact with the sealing gasket, and the steel ring is in contact with the polyethylene outer layer.
7. A steel wire mesh skeleton polyethylene composite pipe connection structure as claimed in claim 1, characterized in that: The radius of the arc-shaped groove is the same as the radius of the hollow annular structure.
8. The steel wire mesh skeleton polyethylene composite pipe connection structure according to claim 1, characterized in that: The outer clamp sleeve is composed of a first clamp half circle and a second clamp half circle, and the first clamp half circle and the second clamp half circle are arranged in axisymmetry.
9. A steel wire mesh skeleton polyethylene composite pipe connection structure as claimed in claim 8, characterized in that: A first fastening groove is provided inside the first clamp half circle, the cross section of the first fastening groove is a trapezoidal structure and the opening is the lower bottom side of the trapezoid; a second fastening groove is provided inside the second clamp half circle, the cross section of the second fastening groove is a trapezoidal structure and the opening is the lower bottom side of the trapezoid; connecting seats are provided at both ends of the first clamp half circle and the second clamp half circle, and a connecting piece is provided on the connecting seat for clamping the first clamp half circle and the second clamp half circle; The inclined surfaces on both sides of the first fastening groove and the second fastening groove are in contact with the trapezoidal inclined surfaces of the two inner cores respectively.
10. A connection method for a steel wire mesh skeleton polyethylene composite pipe connection structure according to any one of claims 1 to 9, characterized in that: The steps include: S1. First, the two inner cores are respectively put on the ends of two adjacent polyethylene composite pipes, and then the two steel rings are respectively put on the ends of two adjacent polyethylene composite pipes, and the ends of the polyethylene composite pipes are expanded. When expanding, the ends are curled to form a hollow ring structure, and the steel rings are rolled into the hollow ring structure in time; S2. Install the gasket, the polyethylene inner layer is in contact with the gasket, the inner core arc groove is stuck on the hollow annular structure, and the inner core arc groove and the hollow annular structure are limited; S3. The first clamp half circle and the second clamp half circle of the outer clamp sleeve are respectively put on the trapezoidal inclined surfaces of the two inner cores at the ends of two adjacent polyethylene composite pipes, and clamped by the connecting piece on the connecting seat, thereby tightly connecting the two adjacent polyethylene composite pipes.