Current lead structure for superconducting magnet

Abstract

The invention discloses a current lead structure for a superconducting magnet, relates to a current lead structure, and provides a current lead structure for a superconducting magnet which can be energized and can pass through a coolant. The current lead structure for a superconducting magnet includes a moving part and a fixed part that are axially butted; the fixed part includes a first fixed electrode and a second fixed electrode that are insulated from each other and are nested, and the inner space of the second fixed electrode is for receiving coolant. channel; the moving part includes a first moving electrode and a second moving electrode that are insulated from each other and nested, and the inner space of the second moving electrode is a coolant conducting channel; the end of the first moving electrode is in contact with the end of the first fixed electrode The end portion of the second moving electrode and the end portion of the second fixed electrode conduct through contact and are closed and communicate with the coolant conducting channel and the coolant receiving channel. The superconducting coil is connected to a power source for magnetization, energy discharge, and adding and subtracting coolant to the low-temperature closed container accommodating the superconducting coil can be realized by the present invention.

Description

technical field [0001] The invention relates to a current lead structure, in particular to a current lead structure used to energize a superconducting magnet. Background technique [0002] At present, the application of high-field superconducting MR magnets in the domestic medical imaging industry is very common. The basic principle is to use the superconducting properties of some alloy materials at ultra-low temperature (usually liquid helium temperature), and place the coil wound with this type of wire in a closed container, through cooling, vacuum insulation and other The thermal insulation method creates a relatively stable low-temperature environment, so that the coils located in it can maintain a superconducting state. But in fact, the so-called cryogenic container is not strictly sealed. It needs to be filled with coolant (liquid nitrogen, liquid helium, etc.) The external circuit leaks energy, so it is necessary to leave a coolant channel and a positive and negativ...

AI Technical Summary

Problems solved by technology

The current general application is to separate the coolant channel from the current channel, and even the positive and negative current channels. This not only requires multiple jacks on the console, but also increases heat leakage, which is not conducive to maintaining low temperature and lowering the container. The evaporation rate of the coolant is medium, and the operation is relatively cumbersome: after the coolant is filled, the catheter needs to be taken out, and then the positive and negative current guide rods are inserted into the magnetization operation, and the positive and negative current guide rods are pulled out after the end ; If it is necessary to release energy or extract coolant, the above operations must be repeated, and the efficiency is not high

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