Movable self-positioning rapid cooling mechanical switch for direct-cooling magnet and cooling method

Abstract

The invention relates to a movable self-positioning rapid cooling mechanical switch for a direct-cooling magnet and a cooling method. The movable self-positioning rapid cooling mechanical switch comprises a Dewar, a mechanical switch and a magnet, a top plate is arranged in the upper portion of the Dewar, the top plate is provided with a hoisting structure, an evacuation connector and an air cylinder. The air cylinder is connected with and disconnected from a movably connected cold conduction device arranged in the Dewar through a corrugated pipe; the movably connected cold conduction device is composed of a conical head and a conical bowl which are of a self-positioning structure, the conical bowl is kept still, the conical head is connected with the air cylinder, the air cylinder ascendsand descends, connection and disconnection of the conical head and the conical bowl are achieved, and therefore the cooling control requirement is met flexibly. The cooling method comprises mountinga magnet; loading a magnet, and evacuating the Dewar; performing vacuum leak detection, turning on a refrigerator, turning on the self-positioning mechanical switch, and turning off the self-positioning mechanical switch after an expected temperature is reached. The movable self-positioning mechanical switch solves the problem that the cooling speed of the magnet is low in the early cooling process; the magnet cooling device is simple in structure, practical, reliable and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of low-temperature heat transfer of superconducting magnets, and in particular relates to a movable self-positioning rapid cooling mechanical switch and a cooling method for direct cooling magnets. Background technique [0002] The stable operation of superconducting magnets depends on low temperature conditions. From the classification of low temperature conditions, it can be divided into two methods: liquid helium immersion cooling and refrigerator direct cooling; due to the constraints of helium resource shortage and high cost, refrigerator direct cooling Magnets are becoming more and more popular in the market, but for larger direct cooling magnets, their mass is larger, the cold mass is also larger, and their cooling speed is slower in the early stage, which restricts their cooling time and efficiency. The refrigerator has a relatively high cooling capacity in the liquid nitrogen temperature zone. In or...

AI Technical Summary

Problems solved by technology

[0002] The stable operation of superconducting magnets depends on low temperature conditions. From the classification of low temperature conditions, it can be divided into two methods: liquid helium immersion cooling and refrigerator direct cooling; due to the constraints of helium resource shortage and high cost, refrigerator direct cooling Magnets are becoming more and more popular in the market, but for larger direct cooling magnets, their mass is larger, the cooling mass is also larger, and their cooling speed in the early stage is slower, which limits their cooling time and efficiency

Images