Low-temperature storage tank

Abstract

The invention provides a low-temperature storage tank which comprises a shell, a heat exchanger and a heat exchanger. The conveying pipe is used for conveying a first low-temperature medium; the conveying pipe extends in the axis direction of the shell, fixedly penetrates through the top of the shell and extends into the shell. The lower container body is provided with a hollow inner cavity for storing a first low-temperature medium, is positioned in the shell, is fixedly connected with the conveying pipe and is communicated with the conveying pipe; the upper container body is located above the lower container body in a spaced mode, arranged on the conveying pipe in a sleeving mode and connected with the conveying pipe in a heat conduction mode, and a container cavity used for storing a second low-temperature medium is formed in the upper container body; the boiling point temperature of the second low-temperature medium is not higher than that of the first low-temperature medium. The upper container body is closer to the outer side of the shell than the lower container body. Heat outside the storage tank is firstly conducted to the upper container body through the conveying pipe, part of the heat is absorbed by the low temperature of the second low-temperature medium in the upper container body, the heat conducted to the lower container body is reduced, and the effective storage time of the first low-temperature medium is prolonged.

Description

technical field [0001] The invention relates to the field of cryogenic liquid containers, in particular to a cryogenic storage tank. Background technique [0002] At present, the market demand for cryogenic containers containing low-temperature media such as liquid hydrogen has begun to increase. The manufacture and use of ultra-high vacuum multi-layer heat-insulated cryogenic containers is still in the stage of R&D and design by most enterprises. [0003] It is particularly difficult to design the structure of the miniaturized container for liquid hydrogen. How to reduce its heat leakage to maintain the state of liquid hydrogen is a pain point that needs to be solved urgently. Specifically, at present, the liquid hydrogen container is generally composed of an outer cylinder and an inner cylinder located in the outer cylinder. The inner cylinder is fixed in the outer cylinder through the support structures at both ends. Since the support structure is generally made of a meta...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low-temperature storage tank to solve the problems of heat leakage in the support structure and difficult storage of the medium in the low-temperature container in the prior art

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