CN114171281A - Superconducting magnet heating system - Google Patents
Superconducting magnet heating system Download PDFInfo
- Publication number
- CN114171281A CN114171281A CN202210131820.9A CN202210131820A CN114171281A CN 114171281 A CN114171281 A CN 114171281A CN 202210131820 A CN202210131820 A CN 202210131820A CN 114171281 A CN114171281 A CN 114171281A
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- liquid helium
- heater
- container
- gas
- superconducting magnet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/04—Cooling
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
The invention discloses a superconducting magnet heating system, comprising: the liquid helium container is provided with a through hole for a gas-supply cold current lead to penetrate through, and the heater is used for heating the side wall of the liquid helium container and transferring heat to liquid helium in the liquid helium container so as to evaporate cold helium gas for cooling the gas-supply cold current lead. Therefore, even if only a small amount of liquid helium is stored in the liquid helium container, sufficient cold helium can be generated, so that the normal cooling work of the gas-cooled current lead is ensured, and the safety of the system is further improved. The heater does not directly heat the liquid helium but heats the side wall of the liquid helium container, and the heater does not need to be soaked in the liquid helium, so that the excitation and demagnetization functions at an extremely low liquid level can be realized, the filling amount of the liquid helium can be reduced, and the use cost of the liquid helium is reduced.
Description
Technical Field
The invention relates to the field of superconducting magnets, in particular to a superconducting magnet heating system.
Background
The conventional liquid helium soaks the superconducting magnet, and during excitation and demagnetization, on the current lead female head in adopting pluggable metal current lead to insert the superconducting magnet, the in-process of excitation or demagnetization, metal current lead can generate heat, and especially when the high current, calorific capacity is great, if not in time cooling down, can influence the security of magnet excitation, can lead to the magnet to quench even.
At present, liquid helium is mainly heated and evaporated into cold helium, and the cold helium flows from the inside and the outside of the metal current lead from bottom to top, so that the metal current lead is cooled. However, the conventional liquid helium heating mode is greatly influenced by the amount of liquid helium, and when the amount of liquid helium is small, the heating function cannot be realized, so that cold helium cannot be generated, and the normal work of a system is influenced.
Disclosure of Invention
The invention aims to provide a superconducting magnet heating system which is not influenced by the amount of liquid helium and can effectively improve the safety of system operation.
In order to solve the technical problems, the invention provides the following technical scheme:
a superconducting magnet heating system comprising: the liquid helium container comprises a liquid helium container and a heater, wherein a through hole for a gas-supply cold current lead to penetrate through is formed in the upper portion of the liquid helium container, the heater is used for heating the side wall of the liquid helium container and transferring heat to liquid helium in the liquid helium container, so that the liquid helium is evaporated to form cold helium gas for cooling the gas-supply cold current lead.
Preferably, the heater is affixed to an inner surface of the liquid helium vessel.
Preferably, the heater is immersed within or located outside the liquid helium.
Preferably, the wiring harness of the heater passes out of the through hole.
Preferably, the heater is attached to an outer surface of the liquid helium vessel.
Preferably, an adsorber is arranged on the outer surface of the liquid helium container, and the heater is a heating unit arranged in the adsorber.
Compared with the prior art, the technical scheme has the following advantages:
the invention provides a superconducting magnet heating system, which comprises: the liquid helium container is provided with a through hole for a gas-supply cold current lead to penetrate through, and the heater is used for heating the side wall of the liquid helium container and transferring heat to liquid helium in the liquid helium container so as to evaporate cold helium gas for cooling the gas-supply cold current lead. Therefore, even if only a small amount of liquid helium is stored in the liquid helium container, sufficient cold helium can be generated, so that the normal cooling work of the gas-cooled current lead is ensured, and the safety of the system is further improved. The heater does not directly heat the liquid helium but heats the side wall of the liquid helium container, and the heater does not need to be soaked in the liquid helium, so that the excitation and demagnetization functions at an extremely low liquid level can be realized, the filling amount of the liquid helium can be reduced, and the use cost of the liquid helium is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a superconducting magnet heating system according to an embodiment of the present invention;
FIG. 2 is a schematic view of the heater located in the lower portion of the inner surface of the liquid helium vessel;
FIG. 3 is a schematic view of the heater positioned on the upper portion of the outer surface of the liquid helium vessel;
FIG. 4 is a schematic view of the heater located on the lower portion of the outer surface of the liquid helium vessel;
FIG. 5 is a schematic diagram of a heating unit of an adsorber in place of a heater.
The reference numbers are as follows:
the device comprises a liquid helium container 1, a through hole 2, an air-cooled current lead 3, a heater 4, a wire harness 5, a first wire harness adapter 6, a magnet wire harness 7, a magnet monitoring device 8, a vacuum cylinder 9, a pumping port 10, a second wire harness adapter 11 and an adsorber 12.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
Referring to fig. 1 to 5, fig. 1 is a schematic structural diagram of a superconducting magnet heating system according to an embodiment of the present invention; FIG. 2 is a schematic view of the heater located in the lower portion of the inner surface of the liquid helium vessel; FIG. 3 is a schematic view of the heater positioned on the upper portion of the outer surface of the liquid helium vessel; FIG. 4 is a schematic view of the heater located on the lower portion of the outer surface of the liquid helium vessel; FIG. 5 is a schematic diagram of a heating unit of an adsorber in place of a heater.
One embodiment of the present invention provides a superconducting magnet heating system, including: the liquid helium container comprises a liquid helium container 1 and a heater 4, wherein the upper part of the liquid helium container 1 is provided with a through hole 2 for a gas cooling current lead 3 to penetrate through, the heater 4 is used for heating the side wall of the liquid helium container 1 and transferring heat to liquid helium in the liquid helium container 1, the liquid helium is heated and evaporated to generate cold helium gas, and the cold helium gas rises to cool the gas cooling current lead 3. Therefore, even if only a small amount of liquid helium is stored in the liquid helium container 1, cold helium gas can be generated to ensure the normal cooling work of the gas-cooled current lead 3, and further the safety of the system is improved. Because the heater 4 does not directly heat the liquid helium, but heats the side wall of the liquid helium container 1, the heater 4 does not need to be soaked in the liquid helium, so that the excitation and demagnetization functions at the time of extremely low liquid level can be realized, the filling amount of the liquid helium can be reduced, and the use cost of the liquid helium is reduced.
The heater 4 is attached to the inner surface of the liquid helium container 1, the heater 4 may be located at any position of the inner surface of the liquid helium container 1, as shown in fig. 1 and 2, the heater 4 may be located at the upper part of the inner surface of the liquid helium container 1, or the lower part of the inner surface of the liquid helium container 1, and the heater 4 is immersed in the liquid helium or located outside the liquid helium. When the heater 4 is positioned on the inner surface of the liquid helium container 1, the wiring harness 5 of the heater 4 penetrates out of the through hole 2 in the upper part of the liquid helium container 1 and is connected with the first wiring harness adapter 6, the first wiring harness adapter 6 is connected with the magnet monitoring device 8 through the magnet wiring harness 7, and the heating function of the heater 4 is controlled through the magnet monitoring device 8.
Further, the heater 4 may be attached to the outer surface of the liquid helium vessel 1, and as shown in fig. 3 and 4, the heater 4 may be located at an upper portion of the outer surface of the liquid helium vessel 1, or at a lower portion of the outer surface of the liquid helium vessel 1. Wherein the outside cover of heater 4 is equipped with a vacuum section of thick bamboo 9, and the outside of vacuum section of thick bamboo 9 is equipped with and takes out a mouthful 10, and heater 4 is located a vacuum section of thick bamboo 9, and heater 4's pencil is worn out through taking out a mouthful 10, is connected with second pencil adapter 11, and second pencil adapter 11 rethread magnet pencil 7 is connected with magnet monitoring device 8. The wiring harness 5 for the heater 4 is led out from the liquid helium vessel 1, and the wiring harness 5 for the heater 4 is led out through the extraction opening 10, so that the wiring in the magnet can be reduced.
The heater 4 may be closely attached to the inner surface or the outer surface of the liquid helium vessel 1 by a low temperature resistant adhesive tape or resin.
Furthermore, the outer surface of the liquid helium container 1 is provided with an adsorber 12, as shown in fig. 5, the adsorber 12 is provided with an activated carbon adsorbent and a heating unit, during the production process of the magnet, it is necessary to perform vacuum pumping through the pumping port 10, during the vacuum pumping, it is necessary to heat the heating unit to analyze the gas adsorbed in the adsorbent, such as water vapor, etc., and after the vacuum pumping is completed, the heating unit stops heating. The side wall of the liquid helium vessel 1 can therefore be heated by the heating means of the adsorber 12, i.e. the heater 4 is a heating means provided in the adsorber 12. The mode is equivalent to the mode that the heater 4 is omitted, the use of parts is reduced, and the cost and the manufacturing process are reduced.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A superconducting magnet heating system, comprising: the liquid helium cooling device comprises a liquid helium container (1) and a heater (4), wherein a through hole (2) for a gas cooling current lead (3) to penetrate through is formed in the upper portion of the liquid helium container (1), and the heater (4) is used for heating the side wall of the liquid helium container (1) and transferring heat to liquid helium in the liquid helium container (1) so that the liquid helium is evaporated to form cold helium gas for cooling the gas cooling current lead (3).
2. A superconducting magnet heating system according to claim 1, wherein the heater (4) is affixed to an inner surface of the liquid helium vessel (1).
3. A superconducting magnet heating system according to claim 2, wherein the heater (4) is immersed in or located outside liquid helium.
4. A superconducting magnet heating system according to claim 2 or 3, wherein the wire harness of the heater (4) passes out of the through-hole (2).
5. A superconducting magnet heating system according to claim 1, wherein the heater (4) is affixed to an outer surface of the liquid helium vessel (1).
6. Superconducting magnet heating system according to claim 1, wherein the outer surface of the liquid helium vessel (1) is provided with an adsorber (12), the heater (4) being a heating unit provided within the adsorber (12).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210131820.9A CN114171281B (en) | 2022-02-14 | 2022-02-14 | Superconducting magnet heating system |
| PCT/CN2022/131864 WO2023151331A1 (en) | 2022-02-14 | 2022-11-15 | Superconducting magnet heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210131820.9A CN114171281B (en) | 2022-02-14 | 2022-02-14 | Superconducting magnet heating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114171281A true CN114171281A (en) | 2022-03-11 |
| CN114171281B CN114171281B (en) | 2022-05-17 |
Family
ID=80489895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210131820.9A Active CN114171281B (en) | 2022-02-14 | 2022-02-14 | Superconducting magnet heating system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114171281B (en) |
| WO (1) | WO2023151331A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023151331A1 (en) * | 2022-02-14 | 2023-08-17 | 宁波健信超导科技股份有限公司 | Superconducting magnet heating system |
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| JPH04180203A (en) * | 1990-11-15 | 1992-06-26 | Mitsubishi Electric Corp | Very low temperature apparatus |
| JPH0513826A (en) * | 1991-07-08 | 1993-01-22 | Fuji Electric Co Ltd | Current lead of superconducting device |
| JPH08306971A (en) * | 1995-04-27 | 1996-11-22 | Furukawa Electric Co Ltd:The | Superconductive device |
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| CN114038645A (en) * | 2022-01-11 | 2022-02-11 | 宁波健信核磁技术有限公司 | Air-cooled current lead and superconducting magnet system |
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| JP2008121917A (en) * | 2006-11-09 | 2008-05-29 | Shinei Kk | Constant temperature generating device and its heat transferring structure |
| CN101783220B (en) * | 2009-01-20 | 2011-12-07 | 西门子(深圳)磁共振有限公司 | Cooling device |
| CN102545725B (en) * | 2012-02-02 | 2014-04-30 | 中国科学院电工研究所 | Super-conduction magnetic levitation device without liquid helium volatilization |
| US10775455B2 (en) * | 2018-03-29 | 2020-09-15 | Siemens Healthcare Gmbh | Power management for cryogen compressors |
| CN114171281B (en) * | 2022-02-14 | 2022-05-17 | 宁波健信核磁技术有限公司 | Superconducting magnet heating system |
-
2022
- 2022-02-14 CN CN202210131820.9A patent/CN114171281B/en active Active
- 2022-11-15 WO PCT/CN2022/131864 patent/WO2023151331A1/en unknown
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| JPS5516487A (en) * | 1978-07-24 | 1980-02-05 | Toshiba Corp | Superconductive equipment |
| US4756167A (en) * | 1986-05-06 | 1988-07-12 | Kabushiki Kaisha Toshiba | Helium cooling apparatus |
| JPH04180203A (en) * | 1990-11-15 | 1992-06-26 | Mitsubishi Electric Corp | Very low temperature apparatus |
| JPH0513826A (en) * | 1991-07-08 | 1993-01-22 | Fuji Electric Co Ltd | Current lead of superconducting device |
| JPH08306971A (en) * | 1995-04-27 | 1996-11-22 | Furukawa Electric Co Ltd:The | Superconductive device |
| JP2007173460A (en) * | 2005-12-21 | 2007-07-05 | Mitsubishi Electric Corp | Superconducting electromagnet device |
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| WO2013172148A1 (en) * | 2012-05-14 | 2013-11-21 | 株式会社 日立メディコ | Magnetic resonance imaging device, gas recovery unit for magnetic resonance imaging device, and method for operating magnetic resonance imaging device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2023151331A1 (en) | 2023-08-17 |
| CN114171281B (en) | 2022-05-17 |
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Address after: 315300 No. 427, Gaoke Avenue, Cixi High-tech Industrial Development Zone, Ningbo City, Zhejiang Province Patentee after: Ningbo Jianxin Superconducting Technology Co.,Ltd. Address before: 315301 No.427, Gaoke Avenue, Cixi hi tech Industrial Development Zone, Ningbo City, Zhejiang Province Patentee before: NINGBO JANSEN NMR TECHNOLOGY Co.,Ltd. |
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