A kind of plastic liner of high pressure composite container

Abstract

The invention relates to a plastic liner of a high-pressure composite container, which at least comprises two sub-plastic liner assemblies and a fiber composite layer. The sealing performance between the metal end and the plastic shell is ensured by using a compression sealing ring; the boss passing through the opening of the plastic shell is limited by the shape of the metal end and the metal lining, and the The ends are firmly fixed together. In the case of repeated changes in the pressure and temperature inside the high-pressure container, the opening of the plastic shell can still not be separated from the metal end, and the sealing part at the sealing ring will not be dislocated and damaged. Seal failure or decay to achieve strong resistance to multiple pressure and temperature changes; in addition, due to the rigidity of the metal lining, the creep of the material at the sealing mouth of the plastic shell is limited, that is, the plastic shell is limited. The sealing mouth is loosened inward to avoid the problem that the compression of the sealing ring is reduced, which leads to the deterioration or failure of the sealing performance.

Description

technical field [0001] The invention relates to a sealing structure for a high-pressure composite container plastic liner, which is a sealing structure for a high-pressure composite container of a polymer material plastic liner containing high-pressure gas. Background technique [0002] Most taxis are converted into compressed natural gas (CNG) instead of fuel. Generally, the working pressure of CNG high-pressure gas cylinder is 20MPa; some vehicle manufacturers have promoted vehicles with CNG or CNG mixed with fuel, such as Audi and GM. The use of hydrogen dielectric battery vehicles is also a current hot spot. The working pressure of hydrogen storage high-pressure gas cylinders is generally 35MPa and 70MPa, and the 70MPa type IV bottle (high-pressure plastic liner composite container) is the current research and development hotspot. [0003] In addition to vehicles, high-pressure gas cylinders are also fully used in other fields. For example, some liquefied petroleum gas i...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a plastic liner of a high-pressure composite container to solve the problem of loose connection between the plastic liner and the metal terminal in the prior art when high and low pressure or temperature are alternated, and the sealing performance is reduced

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