Continuous fiber reinforced thermoplastic composite high-pressure pipeline

Abstract

The invention relates to a continuous fiber reinforced thermoplastic composite high-pressure pipeline which is provided with an inner wall and an outer wall, wherein an intermediate layer is arranged between the inner wall and the outer wall, the inner wall and the outer wall are respectively made of thermoplastic resin materials, the intermediate layer is a continuous fiber resin reinforced layer formed by compounding a plurality of layers of fiber resin layers thermoplastically, each fiber resin layer is made of a band material formed by pre-impregnating and melting continuous fibers or continuous fiber bundles and the thermoplastic resin material, and fibers in the fiber resin layers are glass fibers, aramid fibers or carbon fibers. In addition, the intermediate layer can be internally provided with a self-heating type heating coil. The continuous fiber reinforced thermoplastic composite high-pressure pipeline can be coiled to be transported and laid without being limited by regions, thus the laying efficiency of the pipeline is greatly increased and the laying cost is reduced.

Description

technical field [0001] The invention relates to a continuous fiber-reinforced thermoplastic composite high-pressure pipeline, which is especially suitable for viscous fluids that need to be transported by high-pressure heating, and belongs to the technical field of fluid delivery pipelines and polymer composite materials. Background technique [0002] As far as the applicant knows, with the continuous expansion and construction of cities and the continuous exploitation of oil and natural gas, the demand for transportation pipelines is also increasing. Traditional steel pipelines have poor corrosion resistance and are not easy to handle, so they can no longer meet the current needs; especially in the oil transportation industry, due to the high viscosity of oil, it is necessary to build heating tanks every few kilometers to heat the pipeline during transportation. Raising the temperature of oil can improve the fluidity of oil and ensure the smooth transportation of oil, but t...

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Problems solved by technology

However, the applicant found through practical research that although these two types of pipelines can heat the fluid, their heating efficiency is low and their impact resistance is weak

The current research on fiber-reinforced pipes has found that: when the inside of the pipe is compressed and expanded, the fibers of the reinforcement layer are tightened to provide compression resistance. The fiber is still in a relaxed state, which makes the overall force of the pipe reinforcement layer uneven and cannot meet the requirements of high pressure use

[0007] In addition, as far as the applicant knows, the maximum diameter of similar composite pipes in the world can only reach 150mm at present. If the pipe diameter is larger than this, the strength of the pipe cannot be guaranteed.

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