Plastic liner of high pressure compound container

Abstract

The invention relates to a plastic liner of a high pressure compound container. The plastic liner is composed of a plastic housing, a plastic sealing part and a metal end. The plastic sealing part isin frit seal to the plastic housing; the plastic sealing part comprises a sealing part body and hot melting teeth arranged on the circumference of the outer surface of the sealing part body, and the hot melting teeth are inserted into the inner surface of the plastic housing to form frit seal. The plastic liner of the sealing structure provided by the invention is only composed of the plastic housing, the plastic sealing part and the metal end, so that the plastic liner is concise in sealing structure; the metal end, the plastic sealing part and the plastic housing are positioned well in either axial direction or circumferential direction, relative positions of the plastic sealing part, the plastic housing and a bottle valve do not change under a circumstance of alternate change of high and low pressures and temperature, and the sealing surface of the plastic sealing part does not deform and lose position, so that the high pressure compound container has excellent high- and low-temperature resistance and temperature alternating property.

Description

technical field [0001] The invention belongs to the technical field of high-pressure composite containers, in particular to a polymer plastic liner for containing high-pressure gas. Background technique [0002] Most taxis are converted to compressed natural gas (CNG) to replace fuel. Generally, the working pressure of CNG high-pressure cylinders is 20MPa; some vehicle manufacturers have promoted vehicles that use CNG or CNG mixed with fuel, such as Audi and GM. Vehicles using hydrogen-dielectric batteries are 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 a current research and development hotspot. In addition to vehicle use, high-pressure gas cylinders are also fully used in other fields. For example, some liquefied petroleum gas in Europe uses plastic liner composite containers (working pressure 2MPa). A large numb...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a plastic liner of a high-pressure composite container to solve the problem of loosening of the connection between the plastic liner and the metal end during the repeated use of the existing plastic shell and metal end of the gas cylinder. falling problem

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