Sealing structure of high-pressure composite container

Abstract

The invention relates to a sealing structure of a high-pressure composite container. The sealing structure of the high-pressure composite container comprises a plastic inner container, and the plasticinner container consists of a plastic shell, a metal end, a metal lining and a sealing ring. According to the technical solution, sealing is conducted in a mode of compressing the sealing ring, the sealing performance between the metal end and the plastic shell is guaranteed, a boss at the opening of the plastic shell is firmly fixed to the metal end under the limitation of the shapes of the metal end and the metal lining, the opening of the plastic shell can still not be separated from the metal end under the condition that the internal pressure and temperature of a high-pressure container body are repeatedly changed, sealing failure or attenuation caused by staggering damage of a sealing part at the sealing ring is avoided, besides, due to the fact that the metal lining has certain rigidity, creep deformation of materials of the sealing opening of the plastic shell is limited, and the problem that the sealing performance is attenuated or loses efficacy due to the fact that the compression amount of the sealing ring is reduced is avoided.

Description

technical field [0001] The invention belongs to the technical field of high-pressure composite containers, in particular to a sealing structure for a high-pressure composite container with a polymer plastic inner liner for 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. In addition to vehicles, high-pressure gas cylinders are also fully used in other fields. For example, some liquefied petroleum gas in Europe uses ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a sealing structure of a high-pressure composite container to solve the problem that the connection between the plastic liner and the metal end will become loose and the sealing performance will decrease during the repeated use of the existing plastic shell and metal end of the gas cylinder The problem

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