Helium cooling magnetic resonance superconducting magnet

Abstract

The invention discloses a helium cooling magnetic resonance superconducting magnet which comprises a vacuum vessel, an accommodating cavity used for arranging a cryogenic vessel is formed inside the vacuum vessel, and a cold shield which is used for reducing radiation heat leakage of room temperature to the cryogenic vessel is further arranged in the accommodating cavity; a superconducting coil is arranged in the cryogenic vessel; a refrigerating machine is fixed on the vacuum vessel; a first stage cold head of the refrigerating machine is connected with the cold shield, a second stage cold head of the refrigerating machine is located in the cryogenic vessel, the helium cooling magnetic resonance superconducting magnet further comprises a helium gas pipe which is used for filling gaseous helium into the cryogenic vessel, the helium gas pipe comprises a stretching end which stretches out of the vacuum vessel, and a sealing ball valve which is used for preventing gaseous helium leaking when the helium cooling magnetic resonance superconducting magnet operates or the superconducting coil is invalid. The gaseous helium in the cryogenic vessel is specifically gaseous helium with 1-10 atmospheric pressure in room temperature. According to the helium cooling magnetic resonance superconducting magnet, the helium gas utilization ratio can be improved, and the maintenance process of the superconducting magnet can be simplified.

Description

technical field [0001] The invention relates to the technical field of superconducting magnets, in particular to a helium-cooled magnetic resonance superconducting magnet. Background technique [0002] With the rapid development of my country's economic construction, the market demand for various types of helium-cooled magnetic resonance superconducting magnets is increasing. [0003] Typically, MRI superconducting magnets use liquid helium as a coolant. With the popularization of nuclear magnetic resonance imaging systems and the increase in the number of other high-end scientific instruments, the global demand for helium is increasing at a rate of 4% to 6% every year, and the price of liquid helium continues to rise year by year due to the double influence of demand and supply. Since the main producing areas of helium are the United States, Russia and other countries, these countries have restricted the export of helium through legislation, and the global production has d...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a helium gas-cooled magnetic resonance superconducting magnet, which can solve the problems of no liquid helium heat conduction and helium leakage when the superconducting magnet quenches

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