Ultralow-temperature liquid hydrogen storage pressure vessel interlayer space vacuumizing method and device

Abstract

The invention discloses an ultralow-temperature liquid hydrogen storage pressure vessel interlayer space vacuumizing method and device. The vacuumizing method adopts a wire drawing material reducing vacuumizing method and comprises the following steps that: (1), a metal wire is preset: in the manufacturing stage of the ultralow-temperature liquid hydrogen storage pressure vessel, an ultra-long metal wire with a certain volume and weight is put in an interlayer space of the ultralow-temperature liquid hydrogen storage pressure vessel in advance, meanwhile, a micro-perforated hole is formed in the tank wall of an outer container of the ultralow-temperature liquid hydrogen storage pressure container, one end of the metal wire penetrates through the micro-perforated hole from the interior of the interlayer space and then extends out of the tank wall of the outer container, and the metal wire and the micro-perforated hole are in interference sealing fit through wiredrawing; and (2), wire drawing and material reducing are conducted, specifically, the metal wires are pulled from the outside, the metal wires preset in the interlayer space are gradually drawn out in a wire drawing mode, and after wire drawing and material reducing are conducted, the micro-perforated holes where the metal wires penetrate are sealed from the outside through a surfacing method. The vacuum pumping efficiency can be improved, the vacuum pumping energy consumption is reduced, and the vacuum degree of the interlayer space of the ultralow-temperature liquid hydrogen storage pressure container is improved.

Description

technical field [0001] The invention relates to the technical field of vacuuming, in particular to a method and device for vacuuming the interlayer space of an ultra-low temperature liquid hydrogen storage pressure vessel. 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 the transfer of external heat. , 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 interlayer v...

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Problems solved by technology

[0008] Second, high energy consumption

Due to the low efficiency and high energy consumption of the vacuum pump in the later stage, it takes a long time to vacuum, which consumes a lot of electricity, and it needs to be monitored by a row of personnel for a long time, which increases the production cost

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