CN-121993668-A - Non-adhesive flexible composite pipe

Abstract

The invention discloses a non-adhesive flexible composite pipe, relates to the technical field of marine oil gas transportation and offshore hydrogen energy transportation, and solves the problems of complex process, short material service life and large overall weight of a pipeline existing in the conventional structure. Including by interior and the skeleton layer that sets gradually outward, interior pressure sealing layer, resistance to compression armor, first auxiliary layer, tensile armor and outer coating, be non-bonding connection between each layer, interior pressure sealing layer and outer coating all are the PA11 material layer, and resistance to compression armor bears the inside and outside pressure differential of pipeline, and first auxiliary layer buffering keeps apart intraductal transport medium, and tensile armor bears axial tension. On the premise of ensuring the safety of medium conveying, the wear resistance is improved, the problem of short service life of each coating layer of the flexible pipe is solved, the design life of the non-adhesive flexible composite pipeline is effectively prolonged, the cost is reduced by reducing the number of tensile armor layers, and the flexible pipe has the advantages of reasonable structure, light weight, high production efficiency, low cost and long service life.

Inventors

• XIA PINGYUAN
• SHAN XIAO
• JIANG MING

Assignees

• 江苏正道可燃冰管道有限公司

Dates

Publication Date

20260508

Application Date

20260305

Claims (9)

1. 1. A non-adhesive flexible composite pipe is characterized by comprising a framework layer, an internal pressure sealing layer, an anti-compression armor layer, a first auxiliary layer, a tensile armor layer and an outer coating layer which are sequentially arranged from inside to outside, wherein the layers are in non-adhesive connection, the internal pressure sealing layer and the outer coating layer are both PA11 material layers, the anti-compression armor layer bears the pressure difference between the inside and the outside of a pipeline, the first auxiliary layer buffers and isolates conveying media in the pipe, and the tensile armor layer bears axial tension.
2. 2. The non-bonded flexible composite pipe of claim 1, wherein the carcass layer is formed from interlocking formed stainless steel strips.
3. 3. The non-bonded flexible composite pipe as claimed in claim 1 or 2, wherein the inner pressure sealing layer is made of a high-toughness tape of PA11 material.
4. 4. The non-bonded flexible composite pipe of claim 1, wherein the compressive armor layer is formed by helically winding Z-steel in alternating directions.
5. 5. The non-bonded flexible composite pipe of claim 1 or 4, wherein the tensile armour layer is formed by spirally winding flat steel strips alternately in opposite directions.
6. 6. The non-bonded flexible composite pipe of claim 1, wherein the first auxiliary layer is a layer of PA11 material.
7. 7. The non-bonded flexible composite pipe of claim 1 or 6, wherein a second auxiliary layer is further disposed between the tensile armour layer and the outer cladding layer.
8. 8. The non-bonded flexible composite pipe of claim 7, wherein the second auxiliary layer is a layer of PA11 material.
9. 9. The flexible composite pipe as claimed in claim 1, wherein the outer coating layer is a PA11 material layer and is coated on the outermost side by extrusion molding.

Description

Non-adhesive flexible composite pipe Technical Field The invention relates to the technical field of marine oil gas transportation and offshore hydrogen energy transportation, in particular to a non-bonding flexible composite pipe. Background The hydrogen energy is used as a clean energy carrier with huge potential, the large-scale consumption of renewable energy can be guaranteed, the transportation of hydrogen in the midstream of a hydrogen energy industry chain is a key ring for linking the upstream hydrogen preparation and the downstream hydrogen utilization of the hydrogen energy industry chain, in particular to the field of offshore wind power hydrogen production, and in order to adapt to the characteristics of sea wave fatigue and the like, the non-bonded flexible composite pipeline is widely applied to a submarine conveying system due to the good flexibility, strong corrosion resistance and low installation cost (compared with a hard steel pipe), and is also a non-two choice of a hydrogen conveying pipeline for future offshore wind power coupling hydrogen production. The existing high-temperature-resistant non-adhesive flexible composite pipeline is generally provided with an extrusion molding sacrificial layer structure between a framework layer and an internal pressure sealing layer, and polyester tapes are generally selected, and the structure can relieve the problem of extrusion molding stress concentration, but has the defects of complex process, short material service life and large overall weight of the pipeline, and is not beneficial to reducing the manufacturing cost and improving the laying efficiency. Therefore, there is a need for a non-bonded flexible composite pipeline that is simpler in construction, lighter in weight, and still meets the high temperature media delivery requirements. Disclosure of Invention The invention aims to provide a non-adhesive flexible composite pipe which is used for conveying mediums such as hydrogen produced by offshore wind power (also can be used for conveying oil gas and the like), an internal pressure sealing layer and an external coating layer are both PA11 (Polyamide, poly omega-aminoundecyl), the wear resistance is improved on the premise of ensuring the conveying safety of the mediums, the problem of short service life of each coating layer of the flexible pipe is solved, the design life of the non-adhesive flexible composite pipe is effectively prolonged, the cost is reduced by reducing the number of tensile armouring layers, and the non-adhesive flexible composite pipe has the advantages of reasonable structure, light weight, high production efficiency, low cost and long service life. The technical aim of the invention is realized by the following technical scheme: The utility model provides a non-bonding flexible composite pipe, includes by interior skeleton layer, interior pressure sealing layer, resistance to compression armor, first auxiliary layer, tensile armor and the outer coating that sets gradually outside and, is non-bonding connection between each layer, interior pressure sealing layer and outer coating all are the PA11 material layer, and resistance to compression armor bears the pipeline internal and external pressure difference, and first auxiliary layer buffering keeps apart intraductal conveying medium, and tensile armor bears axial tension. Through adopting above-mentioned technical scheme, interior pressure sealing layer and outer coating all adopt PA11, increase interior pressure sealing layer and auxiliary layer and resist the ability of the interior pressure of conveying medium of hose, under the prerequisite of guaranteeing the medium transportation security, effectively improved the design life of non-bonding flexible composite pipeline, simultaneously, can also reduce the tensile armor layer number, reduce cost under the sufficient circumstances of tensile strength. Further, the framework layer is made of stainless steel strips which are formed in an interlocking mode. By adopting the technical scheme, the support of the pipeline integral structure is realized. Further, the internal pressure sealing layer is made of a high-toughness band of PA11 material. By adopting the technical scheme, the sealing of the conveying medium is realized. Furthermore, the compression-resistant armor layer is formed by spirally winding Z-shaped steel in a positive-negative alternating mode. By adopting the technical scheme, the pressure difference between the inside and the outside of the pipeline is born. Furthermore, the tensile armour layer is formed by spirally winding flat steel strips in a positive-negative alternating mode. By adopting the technical scheme, the axial tension bearing is realized. Still further, the first auxiliary layer is a PA11 material layer. By adopting the technical scheme, the anti-friction between the compression-resistant armor layer and the tensile armor layer is realized. Further, a second auxiliary layer is a