CN-121565621-B - Superconducting magnet cooling system

CN121565621BCN 121565621 BCN121565621 BCN 121565621BCN-121565621-B

Abstract

The invention provides a superconducting magnet cooling system, which relates to the technical field of superconducting magnet design and comprises a superconducting coil cavity, a refrigerating pipeline, a gas driving piece and a first refrigerating component, wherein the superconducting coil cavity is used for installing a superconducting coil, two ends of the refrigerating pipeline are respectively communicated with the superconducting coil cavity, the gas driving piece is used for driving gas in the superconducting coil cavity to enter the refrigerating pipeline and flow back into the superconducting coil cavity after passing through the refrigerating pipeline, the gas in the refrigerating pipeline is suitable for flowing through the first refrigerating component so as to enable the first refrigerating component to cool the gas in the refrigerating pipeline, and at least part of the refrigerating pipeline penetrates through the second refrigerating component so as to enable the second refrigerating component to cool the gas in the refrigerating pipeline. The superconducting magnet cooling system provided by the embodiment of the invention can improve the cooling speed, can quickly recover the low-temperature environment in the superconducting coil cavity after the superconducting magnet fails, can also avoid residual cooling medium in the superconducting coil cavity, improves the cleanliness, ensures the running stability and reliability of the superconducting coil, and has better use effect and wider application range.

Inventors

ZOU CHUNLONG
HU RUI
DU SHUANGSONG
ZHANG HUAHUI
DING KAIZHONG
JIANG FENG
CHEN YONGHUA
LI JUN
LIU LU

Assignees

合肥中科离子医学技术装备有限公司

Dates

Publication Date: 20260505
Application Date: 20260126

Claims (8)

1. A superconducting magnet cooling system, comprising: a superconducting magnet device (1), wherein a superconducting coil cavity (11) is formed in the superconducting magnet device (1), and the superconducting coil cavity (11) is used for installing a superconducting coil (12); the gas-driven element (24) is arranged in the refrigeration pipeline (2), and the gas in the superconducting coil cavity (11) is driven to enter the refrigeration pipeline (2) and flow back into the superconducting coil cavity (11) after passing through the refrigeration pipeline (2); The first refrigeration component (3) and the second refrigeration component (4), wherein the first refrigeration component (3) and the second refrigeration component (4) are distributed along the refrigeration pipeline (2) in sequence, the gas in the refrigeration pipeline (2) is suitable for flowing through the first refrigeration component (3) so that the first refrigeration component (3) cools the gas in the refrigeration pipeline (2), and at least part of the refrigeration pipeline (2) penetrates through the second refrigeration component (4) so that the second refrigeration component (4) cools the gas in the refrigeration pipeline (2); The first refrigeration assembly (3) comprises a first refrigeration machine (31) and a heat exchanger (32), a heat exchange wall (34) is formed in the heat exchanger (32), the heat exchange wall (34) defines a heat exchange flow passage (33), the first refrigeration machine (31) is used for cooling the heat exchange wall (34), the heat exchange flow passage (33) is connected in series in the refrigeration pipeline (2) and enables gas in the refrigeration pipeline (2) to be suitable for exchanging heat with the heat exchange wall (34), the second refrigeration assembly (4) comprises a refrigeration box (41) and a liquid nitrogen tank (42), the refrigeration box (41) is provided with a refrigeration cavity (411), at least part of the refrigeration pipeline (2) is located in the refrigeration cavity (411), and the liquid nitrogen tank (42) is used for conveying liquid nitrogen into the refrigeration cavity (411) so as to exchange heat with the gas in the refrigeration pipeline (2).
2. The superconducting magnet cooling system according to claim 1, wherein the heat exchange flow passage (33) is provided with an air inlet (35) and an air outlet (36) which are respectively communicated with the refrigeration pipeline (2), the heat exchange flow passage (33) comprises a plurality of annular flow passages (331) which are sleeved and communicated in sequence along the radial direction, one of the air inlet (35) and the air outlet (36) is communicated with the innermost annular flow passage (331), and the other of the air inlet (35) and the air outlet (36) is communicated with the outermost annular flow passage (331).
3. The superconducting magnet cooling system according to claim 2, wherein one of the air inlet (35) and the air outlet (36) extends in an axial direction of the annular flow passage (331), the other of the air inlet (35) and the air outlet (36) extending radially outwardly of the annular flow passage (331); And/or two adjacent annular flow passages (331) are communicated through communication flow passages (332) extending along the radial direction, and the two communication flow passages (332) communicated with each annular flow passage (331) are communicated with two radial sides of the annular flow passage (331).
4. Superconducting magnet cooling system according to claim 1, wherein the portion of the refrigeration circuit (2) located within the refrigeration cavity (411) is configured as a spiral tube (21); And/or the refrigerating box (41) is provided with a nitrogen discharge port (412) communicated with the refrigerating cavity (411), and the nitrogen discharge port (412) is used for discharging nitrogen in the refrigerating cavity (411).
5. The superconducting magnet cooling system according to claim 1, further comprising an impurity gas discharging device (5), the impurity gas discharging device (5) being in communication with the superconducting coil chamber (11), the impurity gas discharging device (5) being for selectively evacuating the superconducting coil chamber (11) and for delivering helium gas into the superconducting coil chamber (11).
6. The superconducting magnet cooling system according to claim 5, wherein the impurity gas discharging device (5) includes a helium tank (51) and a vacuum machine (52), the helium tank (51) and the vacuum machine (52) being respectively in selective communication with the refrigeration line (2), the vacuum machine (52) being configured to evacuate the superconducting coil chamber (11), the helium tank (51) being configured to deliver helium into the superconducting coil chamber (11).
7. The superconducting magnet cooling system according to claim 1, wherein the superconducting magnet device (1) further comprises a third refrigeration assembly (14), the third refrigeration assembly (14) comprising a second refrigerator (141) and a condenser (142) connected, the condenser (142) being located within the superconducting coil cavity (11) for refrigerating the gas within the superconducting coil cavity (11).
8. The superconducting magnet cooling system according to claim 1, wherein the refrigerating pipeline (2) is provided with an air inlet control valve (22) and an air outlet control valve (23), two ends of the refrigerating pipeline (2) are detachably mounted on the superconducting magnet device (1) through the air inlet control valve (22) and the air outlet control valve (23) respectively, and two ends of the refrigerating pipeline (2) are selectively communicated with the superconducting coil cavity (11) through the air inlet control valve (22) and the air outlet control valve (23) respectively.

Description

Superconducting magnet cooling system Technical Field The invention relates to the technical field of superconducting magnet design, in particular to a superconducting magnet cooling system. Background The superconducting magnet operates in a low-temperature environment, and how to realize rapid cooling of the superconducting magnet and how to enable the environment in which the superconducting magnet is positioned to rapidly recover the low temperature after the superconducting magnet fails are important problems to be considered in ensuring the operation stability of the superconducting magnet. At present, the cooling of a superconducting magnet mainly comprises two modes of conduction cooling and low-temperature medium precooling, but the conduction cooling speed is lower, the recovery speed of the low-temperature environment where the superconducting magnet is located after the fault of the superconducting magnet is low, the economy is poor, the cooling process of the low-temperature medium precooling is uncontrollable, liquid nitrogen is required to be treated after the precooling is finished, the process is complex, residual nitrogen is easy to generate, and an improvement space exists. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a superconducting magnet cooling system which has a simple structure, can quickly cool the superconducting magnet, can improve the recovery speed of a low-temperature environment in a superconducting coil cavity, can avoid impurity residues in the superconducting coil cavity, and further can ensure the running stability and reliability of the superconducting magnet. The superconducting magnet cooling system comprises a superconducting magnet device, a refrigerating pipeline, a first refrigerating assembly and a second refrigerating assembly, wherein a superconducting coil cavity is formed in the superconducting magnet device and is used for installing a superconducting coil, gas driving parts are arranged in the refrigerating pipeline and are used for driving gas in the superconducting coil cavity to enter the refrigerating pipeline and flow back into the superconducting coil cavity after passing through the refrigerating pipeline, the first refrigerating assembly and the second refrigerating assembly are sequentially distributed along the refrigerating pipeline, the gas in the refrigerating pipeline is suitable for flowing through the first refrigerating assembly to enable the first refrigerating assembly to cool the gas in the refrigerating pipeline, and at least part of the refrigerating pipeline penetrates through the second refrigerating assembly to enable the second refrigerating assembly to cool the gas in the refrigerating pipeline. According to the superconducting magnet cooling system provided by the embodiment of the invention, the gas in the superconducting coil cavity can circulate into the refrigerating pipeline, and the gas in the refrigerating pipeline can be rapidly cooled by arranging the first refrigerating component and the second refrigerating component, so that the cooled gas can circulate back into the superconducting coil cavity, the superconducting coil is positioned in a low-temperature environment, and the gas can be cooled for two times at the same time, so that the cooling speed is improved, the low-temperature environment in the superconducting coil cavity can be rapidly recovered after the superconducting magnet fails, the residual cooling medium in the superconducting coil cavity can be avoided, the cleanliness is improved, the operation stability and the reliability of the superconducting coil are ensured, the use effect is better, and the application range is wider. According to the superconducting magnet cooling system of some embodiments of the present invention, a heat exchange wall is formed in the heat exchanger, the heat exchange wall defines a heat exchange flow channel, the first refrigerator is used for cooling the heat exchange wall, the heat exchange flow channel is connected in series in the refrigeration pipeline, and the gas in the refrigeration pipeline is suitable for heat exchange with the heat exchange wall. According to the superconducting magnet cooling system of some embodiments of the present invention, the heat exchange flow channel is provided with an air inlet and an air outlet which are respectively communicated with the refrigeration pipeline, the heat exchange flow channel comprises a plurality of annular flow channels which are sleeved and communicated in sequence along the radial direction, one of the air inlet and the air outlet is communicated with the innermost annular flow channel, and the other of the air inlet and the air outlet is communicated with the outermost annular flow channel. According to the superconducting magnet cooling system of some embodiments of the present invention, one of th