Ultralow-temperature liquid hydrogen storage pressure vessel with overhead heat insulation structure

Abstract

The invention discloses an ultralow-temperature liquid hydrogen storage pressure container with an overhead heat insulation structure, which comprises an inner container, an outer container, an interlayer space formed between the inner container and the outer container, and two rows of support columns arranged between the inner container and the outer container along the circumferential direction, a winding heat insulation layer is arranged on the outer wall of a tank body of the inner container, an overhead heat insulation layer is arranged in an interlayer space located between the two rows of supporting columns, gaps are formed between the overhead heat insulation layer and the winding heat insulation layer of the inner container and between the overhead heat insulation layer and the inner wall of a tank body of the outer container respectively, and the overhead heat insulation layer comprises an anti-explosion blocking net ring. The two ends of the anti-explosion blocking net ring are supported on the supporting columns respectively, a layer of heat insulation quilt is fixedly connected to the surface of an inner hole of the anti-explosion blocking net ring, and a layer of reflection aluminum film is arranged on the surface of the outer circle of the anti-explosion blocking net ring. The heat insulation effect of the interlayer space on the ultralow-temperature liquid hydrogen storage pressure container is improved, and the stability of the vacuum degree of the interlayer space is improved.

Description

technical field [0001] The invention relates to the technical field of cryogenic pressure vessels, in particular to an ultra-low temperature liquid hydrogen storage pressure vessel provided with an overhead thermal insulation structure. Background technique [0002] The ultra-low temperature liquid hydrogen storage pressure vessel is a cryogenic pressure vessel used to store ultra-low temperature liquefied hydrogen. It adopts a double-layer structure, including an inner container and an outer container. A vacuum interlayer space is formed between the inner container and the outer container to isolate external heat. Transfer to ensure the safety of the cryogenic liquefied gas in the inner container. In order to improve the thermal insulation performance, thermal insulation materials are usually wound on the inner container body to reduce heat conduction, convection and radiation, so as to achieve the purpose of thermal insulation and storage of cryogenic liquids. The vacuumi...

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Problems solved by technology

[0003] The problems existing in the interlayer heat insulation structure of cryogenic pressure vessels in the prior art are: the heat insulation effect of the heat insulation structure of the multi-layer winding structure in the interlayer is not ideal, and the gas gradually released by the heat insulation material has a great influence on the vacuum degree of the interlayer space

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