A vacuum isolation device for ultra-low temperature fluid transmission pipeline

Abstract

The invention discloses a vacuum isolation device for ultralow-temperature fluid transmission pipelines. The vacuum isolation device comprises a vacuum isolation flange connected with low-temperature pipelines in an ultralow-temperature area, a first low-temperature area and a second low-temperature area; each temperature area comprises a sleeve and a low-temperature pipeline extending out of the sleeve; the ultralow-temperature area is positioned at the center of the vacuum isolation flange, and the second low-temperature area is distributed on the outer periphery of the first low-temperature area which is distributed on the outer periphery of the ultralow-temperature area; the low-temperature pipeline in the ultralow-temperature area, the low-temperature pipeline in the first low-temperature area and the low-temperature pipeline in the second low-temperature area respectively penetrate the vacuum isolation flange, and one end of the sleeve of each temperature area is hermetically connected with the vacuum isolation flange; each sleeve is connected with the low-temperature pipeline in the last temperature area through a thermal stopper which is identical to the low-temperature pipeline in the last temperature area in temperature. The vacuum isolation device has the advantages that temperature gradient of vacuum isolation sleeves is optimized, and fluid consumption of the low-temperature areas is reduced.

Description

technical field [0001] The invention belongs to a vacuum isolation device in an ultra-low temperature fluid transmission pipeline, and is specifically applied to a 2K low temperature transmission pipeline connected to a low temperature distribution valve box of a 2K low temperature system and a cryostat. The device realizes the independence of each vacuum system and prevents certain When a vacuum system is damaged, other vacuum systems are affected. Background technique [0002] In order to further improve the quality factor of superconducting acceleration chambers and superconducting magnets, they are operated in a 2K low-temperature environment. 2K superfluid helium is generally obtained by decompression and cooling of 4.2K liquid helium, which requires extremely strict heat leakage of equipment. In a large cryogenic system, in order to realize the independence of each vacuum system and prevent one vacuum system from being damaged from affecting other vacuum systems, it i...

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Problems solved by technology

[0003] In the current technology, there is no vacuum partition involving 2K in the central low-temperature area (2K superfluid helium is not easy to store, and the requirements for heat leakage of its equipment are more stringent), and the vacuum partitions in the existing schemes are not suitable for this. occasion

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