High-strength and hydrogen-resistant composite material high-pressure pipeline

Abstract

The utility model provides a high-strength and hydrogen-resistant composite high-pressure pipeline which comprises an inner-layer protective sleeve, and the outer wall of the inner-layer protective sleeve is coated with an adhesive coating. The adhesive coating is coated with a glass fiber woven mesh, one or more layers of EVOH films are laminated outside the glass fiber woven mesh, and a sheath layer is arranged on the outer side of the outermost layer of EVOH film. The pipeline is high in strength and resistant to high pressure, the inner wall of the pipeline has hydrogen resistance due to the arrangement of the EVOH film, corrosion of water-soluble hydrogen to the pipeline wall is avoided, and the service life of the pipeline is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of pipelines, and in particular to a high-strength, hydrogen-resistant composite material high-pressure pipeline. Background Art

[0002] In the process of urban infrastructure construction, a large number of water pipelines are often buried for transporting water or drainage. Since the pipelines are buried underground for a long time, the performance and life of the pipelines are greatly tested. Hydrogen is often dissolved in the water, which not only corrodes the pipelines but also affects their conveying capacity.

[0003] The existing pipelines are often not strong enough and often require excavation of the road surface for maintenance. The pipe walls are also often corroded by water-soluble hydrogen. Summary of the invention

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] A high-strength, hydrogen-resistant composite high-pressure pipeline comprises an inner jacket tube, the outer wall of which is coated with an adhesive coating; the adhesive coating is coated with a glass fiber woven mesh on the outside, and one or more layers of EVOH film are stacked on the outside of the glass fiber woven mesh, and a jacket layer is provided on the outside of the outermost EVOH film.

[0006] As a preferred solution, the adhesive coating is an adhesive based on polyolefin.

[0007] As a preferred solution, the glass fiber woven mesh is coated with a thermosetting adhesive.

[0008] As a preferred solution, the EVOH film has a thickness of 0.1-0.5 mm.

[0009] Compared with the prior art, the beneficial effects of the present invention are: the pipeline of the present invention has high strength and high pressure resistance, and the provision of the EVOH film can make the inner wall of the pipeline have hydrogen resistance, thereby avoiding corrosion of the pipe wall by water-soluble hydrogen and improving the life of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0011] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention. DETAILED DESCRIPTION

[0012] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0013] A high-strength, hydrogen-blocking composite material high-pressure pipeline comprises an inner layer jacket pipe 1, and an adhesive coating 2 is coated on the outer wall of the inner layer jacket pipe 1.

[0014] The adhesive coating 2 is coated with a glass fiber woven mesh 3 on the outside, and one or more EVOH films 4 are stacked on the outside of the glass fiber woven mesh 3 . A sheath layer 5 is arranged on the outside of the outermost EVOH film 4 .

[0015] Furthermore, the adhesive coating 2 is made of an adhesive based on polyolefin.

[0016] Furthermore, the glass fiber woven mesh 3 is coated with a thermosetting adhesive 6 .

[0017] Furthermore, the EVOH film 4 has a thickness of 0.1-0.5 mm.

[0018] The pipeline of the present invention has high strength, high pressure resistance and strong reverse osmosis capability. The provision of the EVOH membrane can make the inner wall of the pipeline have hydrogen resistance, thereby preventing corrosion of the pipeline wall by water-soluble hydrogen and improving the service life of the pipeline.

[0019] The specific implementation of the present invention is described in detail above, but it is only used as an example. The present invention is not limited to the specific implementation cases described above, and equivalent modifications to the present invention are also within the protection scope of the present invention.

Claims

1. A high-strength, hydrogen-resistant composite high-pressure pipeline, characterized in that: It comprises an inner layer sheath tube (1), wherein an adhesive coating (2) is coated on the outer wall of the inner layer sheath tube (1); The adhesive coating (2) is coated with a glass fiber woven mesh (3) on the outside, and one or more layers of EVOH film (4) are laminated on the outside of the glass fiber woven mesh (3), and a sheath layer (5) is provided on the outside of the outermost EVOH film (4).

2. The high-strength, hydrogen-blocking composite high-pressure pipeline according to claim 1, characterized in that: The adhesive coating (2) is an adhesive based on polyolefin.

3. The high-strength, hydrogen-blocking composite high-pressure pipeline according to claim 1, characterized in that: The glass fiber woven mesh (3) is coated with a thermosetting adhesive (6).

4. The high-strength, hydrogen-blocking composite high-pressure pipeline according to claim 1, characterized in that: The EVOH film (4) has a thickness of 0.1-0.5 mm.

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