High-strength steel-plastic composite continuous pipe

Abstract

The utility model relates to the technical field of composite pipelines, in particular to a high-strength steel-plastic composite continuous pipe which comprises a pipeline body, the pipeline body comprises a lining layer, a transition layer, a reinforcing layer, a blocking layer and an outer layer which are sequentially arranged from inside to outside, the reinforcing layer comprises a main reinforcing layer, the outer wall of the main reinforcing layer is fixedly connected with a secondary reinforcing layer, and the outer wall of the secondary reinforcing layer is fixedly connected with the transition layer. The outer side of the main reinforcing layer is fixedly connected with the outer side of the transition layer, the main reinforcing layer is a spirally wound galvanized steel wire, the axial and circumferential strength balance is improved through surface galvanizing or epoxy resin coating treatment, the secondary reinforcing layer is a circumferential carbon fiber belt and is wound in the circumferential direction, and the main steel wire mesh bears axial stress; the carbon fiber belt reinforces the circumferential stress concentration area, the overall strength of the pipeline is effectively improved, and the pipeline integrates high strength of metal materials and corrosion resistance of plastics through the multi-layer composite structure design and interface strengthening treatment, and is particularly suitable for high-pressure corrosive fluid conveying scenes.

Description

Technical Field

[0001] This utility model relates to the field of composite pipeline technology, specifically a high-strength steel-plastic composite continuous pipe. Background Technology

[0002] A pipeline is an assembly consisting of pipes, fittings, flanges, bolted connections, gaskets, valves, other components or pressure-bearing parts and supports. It is used for conveying, distributing, mixing, separating, discharging, metering, controlling, and stopping the flow of fluids. Pipelines are widely used in various industrial and civil fields, including water supply, drainage, natural gas transmission, and petrochemicals. In water supply systems, water pipes are typically installed by embedding them in walls, and materials include metal pipes, plastic-coated metal pipes, and plastic pipes.

[0003] The existing pipeline has the following problems:

[0004] Metal pipes are susceptible to corrosion, are heavy, and have high installation costs. For example, steel pipes are prone to rust in humid environments. Pure plastic pipes have low compressive strength and poor temperature resistance. For example, PE pipes are prone to deformation under high pressure. Traditional steel-plastic composite pipes have insufficient bonding between the steel and plastic layers, which can easily lead to interlayer delamination. Moreover, the processing technology is complex, making it difficult to achieve continuous production. They also have weak impact resistance and cannot adapt to complex geological conditions. Utility Model Content

[0005] The purpose of this utility model is to provide a high-strength steel-plastic composite continuous pipe, which combines the high strength of metal materials and the corrosion resistance of plastics through multi-layer composite structure design and interface strengthening treatment, and is particularly suitable for high-pressure and corrosive fluid transportation scenarios.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-strength steel-plastic composite continuous pipe, comprising a pipe body, the pipe body comprising an inner lining layer, a transition layer, a reinforcing layer, a barrier layer and an outer layer arranged sequentially from the inside to the outside, the reinforcing layer comprising a main reinforcing layer, a secondary reinforcing layer fixedly connected to the outer wall of the main reinforcing layer, the outer side of the main reinforcing layer and the transition layer fixedly connected, and the inner side of the secondary reinforcing layer and the barrier layer fixedly connected.

[0007] As a preferred embodiment of the high-strength steel-plastic composite continuous pipe of this utility model, the inner lining layer is made of polytetrafluoroethylene with a thickness of 0.5-2mm.

[0008] As a preferred embodiment of the high-strength steel-plastic composite continuous pipe of this utility model, the transition layer is an ethylene-acrylic acid copolymer hot melt adhesive layer with a thickness of 0.1-0.3 mm.

[0009] As a preferred embodiment of the high-strength steel-plastic composite continuous pipe of this utility model, the main reinforcing layer is a spirally wound galvanized steel wire, and the secondary reinforcing layer is a circumferential carbon fiber strip wound circumferentially at intervals of 20-50cm.

[0010] As a preferred embodiment of the high-strength steel-plastic composite continuous pipe of this utility model, the barrier layer is either aluminum foil or EVOH co-extruded film, with a thickness of 0.05-0.2 mm.

[0011] As a preferred embodiment of the high-strength steel-plastic composite continuous pipe of this utility model, the outer layer is a composite material of modified polypropylene and glass fiber with a thickness of 1-3mm.

[0012] As a preferred embodiment of the high-strength steel-plastic composite continuous pipe of this utility model, both ends of the pipe body are fixedly connected with connecting flanges.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] The inner lining is made of polytetrafluoroethylene (PTFE), a high-molecular wear-resistant material with excellent wear resistance, providing corrosion resistance and low fluid resistance. The reinforcement layer includes a main reinforcement layer, with a secondary reinforcement layer fixedly connected to its outer wall. The main reinforcement layer is a spirally wound galvanized steel wire, treated with galvanizing or epoxy resin coating to improve the balance of axial and circumferential strength. The secondary reinforcement layer is a circumferentially wound carbon fiber strip. The main steel wire mesh bears the axial stress, while the carbon fiber strip reinforces areas of concentrated circumferential stress, effectively improving the overall strength of the pipeline. The barrier layer is made of aluminum foil or EVOH co-extruded film, providing excellent waterproofing and preventing fluid leakage. The outer layer is a composite material of modified polypropylene and glass fiber. The addition of glass fiber significantly improves the tensile strength, flexural strength, and flexural modulus of polypropylene, enabling the pipeline to withstand greater pressure and impact. Through its multi-layer composite structure design and interface reinforcement treatment, this pipeline combines the high strength of metal materials with the corrosion resistance of plastics, making it particularly suitable for high-pressure and corrosive fluid transportation scenarios. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is a diagram showing the overall external structure of the present invention;

[0017] Figure 2 This is a cross-sectional view of the present invention.

[0018] Figure 3 This is a cross-sectional view of the reinforcing layer of this utility model.

[0019] The markings in the diagram are: 1. Pipe body; 2. Inner lining; 3. Transition layer; 4. Reinforcing layer; 5. Barrier layer; 6. Outer layer; 7. Main reinforcing layer; 8. Secondary reinforcing layer; 9. Connecting flange. Detailed Implementation

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0021] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0022] Please see Figures 1 to 3 A high-strength steel-plastic composite continuous pipe includes a pipe body 1. The pipe body 1 includes an inner lining layer 2, a transition layer 3, a reinforcing layer 4, a barrier layer 5, and an outer layer 6 arranged sequentially from the inside to the outside. The reinforcing layer 4 includes a main reinforcing layer 7. A secondary reinforcing layer 8 is fixedly connected to the outer wall of the main reinforcing layer 7. The outer side of the main reinforcing layer 7 and the transition layer 3 are fixedly connected, and the inner side of the secondary reinforcing layer 8 and the barrier layer 5 are fixedly connected.

[0023] In this embodiment: the inner lining layer 2 is made of polytetrafluoroethylene, a high-molecular wear-resistant material with good wear resistance, and a thickness of 0.5-2mm, providing corrosion resistance and low fluid resistance for the pipeline. The reinforcing layer 4 includes a main reinforcing layer 7, with a secondary reinforcing layer 8 fixedly connected to the outer wall of the main reinforcing layer 7. The main reinforcing layer 7 is a spirally wound galvanized steel wire, which is surface-galvanized or coated with epoxy resin to improve the balance of axial and circumferential strength. The secondary reinforcing layer 8 is a circumferential carbon fiber strip, wound circumferentially at intervals of 20-50cm. The main steel wire mesh bears the axial stress, and the carbon fiber strip reinforces the circumferential stress concentration areas, effectively improving the overall strength of the pipeline. The barrier layer 5 is an aluminum foil or EVOH co-extruded film, which has good waterproof effect and prevents fluid leakage. The outer layer 6 is a composite material of modified polypropylene and glass fiber. The addition of glass fiber significantly improves the tensile strength, flexural strength, and flexural modulus of polypropylene, enabling the pipeline to withstand greater pressure and impact. This pipeline, through multi-layer composite structure design and interface strengthening treatment, combines the high strength of metal materials with the corrosion resistance of plastics, making it particularly suitable for high-pressure and corrosive fluid transportation scenarios.

[0024] As a technical optimization of this utility model, the inner lining layer 2 is made of polytetrafluoroethylene with a thickness of 0.5-2mm.

[0025] In this embodiment: the inner lining layer 2 is made of polytetrafluoroethylene, a high-molecular wear-resistant material with good wear resistance, and a thickness of 0.5-2mm, providing the pipeline with corrosion resistance and low fluid resistance.

[0026] As a technical optimization of this utility model, the transition layer 3 is an ethylene-acrylic acid copolymer hot melt adhesive layer with a thickness of 0.1-0.3 mm.

[0027] In this embodiment: the transition layer 3 is an ethylene-acrylic acid copolymer hot melt adhesive layer, which serves as a transition layer.

[0028] As a technical optimization of this utility model, the main reinforcing layer 7 is a spirally wound galvanized steel wire, and the secondary reinforcing layer 8 is a circumferential carbon fiber strip wound circumferentially at intervals of 20-50cm.

[0029] In this embodiment: the main reinforcing layer 7 is a spirally wound galvanized steel wire, which is treated with galvanizing or epoxy resin coating to improve the balance of axial and circumferential strength. The secondary reinforcing layer 8 is a circumferential carbon fiber strip, which is wound circumferentially at intervals of 20-50cm. The main steel wire mesh bears the axial stress, and the carbon fiber strip reinforces the circumferential stress concentration area, effectively improving the overall strength of the pipeline.

[0030] As a technical optimization of this utility model, the barrier layer 5 is either aluminum foil or EVOH co-extruded film, with a thickness of 0.05-0.2mm.

[0031] In this embodiment, the barrier layer 5 is an aluminum foil or EVOH co-extruded film, which has a good waterproof effect and prevents fluid leakage.

[0032] As a technical optimization of this utility model, the outer layer 6 is a composite material of modified polypropylene and glass fiber, with a thickness of 1-3mm.

[0033] In this embodiment, the outer layer 6 is a composite material of modified polypropylene and glass fiber. The addition of glass fiber significantly improves the tensile strength, flexural strength and flexural modulus of polypropylene, thereby enabling the pipe to withstand greater pressure and impact.

[0034] As a technical optimization of this utility model, both ends of the pipe body 1 are fixedly connected with connecting flanges 9.

[0035] In this embodiment, both ends of the pipe body 1 are fixedly connected with connecting flanges 9, which facilitates the connection between the pipe and external pipes.

[0036] Working principle: The inner lining layer 2 is made of polytetrafluoroethylene (PTFE), a high-molecular wear-resistant material with good wear resistance. It has a thickness of 0.5-2mm and provides corrosion resistance and low fluid resistance. The reinforcing layer 4 includes a main reinforcing layer 7, with a secondary reinforcing layer 8 fixedly connected to its outer wall. The main reinforcing layer 7 is a spirally wound galvanized steel wire, treated with galvanizing or epoxy resin coating to improve the balance of axial and circumferential strength. The secondary reinforcing layer 8 is a circumferential carbon fiber strip, wound circumferentially at intervals of 20-50cm. The main steel wire mesh bears the axial stress, while the carbon fiber strip reinforces areas of concentrated circumferential stress, effectively improving the overall strength of the pipeline. The barrier layer 5 is made of aluminum foil or EVOH co-extruded film, providing good waterproofing and preventing fluid leakage. The outer layer 6 is a composite material of modified polypropylene and glass fiber. The addition of glass fiber significantly improves the tensile strength, flexural strength, and flexural modulus of polypropylene, enabling the pipeline to withstand greater pressure and impact. This pipeline, through its multi-layer composite structure design and interface strengthening treatment, combines the high strength of metal materials with the corrosion resistance of plastics, making it particularly suitable for high-pressure and corrosive fluid transportation scenarios.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-strength steel-plastic composite continuous pipe, comprising a pipe body (1), characterized in that: The pipe body (1) includes an inner lining layer (2), a transition layer (3), a reinforcing layer (4), a barrier layer (5) and an outer layer (6) arranged sequentially from the inside to the outside. The reinforcing layer (4) includes a main reinforcing layer (7). A secondary reinforcing layer (8) is fixedly connected to the outer wall of the main reinforcing layer (7). The outer side of the main reinforcing layer (7) and the transition layer (3) are fixedly connected. The inner side of the secondary reinforcing layer (8) and the barrier layer (5) are fixedly connected.

2. The high-strength steel-plastic composite continuous pipe according to claim 1, characterized in that: The inner lining (2) is made of polytetrafluoroethylene and has a thickness of 0.5-2mm.

3. The high-strength steel-plastic composite continuous pipe according to claim 1, characterized in that: The transition layer (3) is an ethylene-acrylic acid copolymer hot melt adhesive layer with a thickness of 0.1-0.3 mm.

4. The high-strength steel-plastic composite continuous pipe according to claim 1, characterized in that: The main reinforcing layer (7) is a spirally wound galvanized steel wire, and the secondary reinforcing layer (8) is a circumferential carbon fiber strip wound circumferentially at intervals of 20-50cm.

5. A high-strength steel-plastic composite continuous pipe according to claim 1, characterized in that: The barrier layer (5) is either aluminum foil or EVOH co-extruded film, with a thickness of 0.05-0.2 mm.

6. A high-strength steel-plastic composite continuous pipe according to claim 1, characterized in that: The outer layer (6) has a thickness of 1-3 mm.

7. A high-strength steel-plastic composite continuous pipe according to claim 1, characterized in that: Both ends of the pipe body (1) are fixedly connected with connecting flanges (9).

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