CN112614643B - Compact superconducting magnet device with room temperature magnetic field cavity - Google Patents
Compact superconducting magnet device with room temperature magnetic field cavity Download PDFInfo
- Publication number
- CN112614643B CN112614643B CN202011453334.6A CN202011453334A CN112614643B CN 112614643 B CN112614643 B CN 112614643B CN 202011453334 A CN202011453334 A CN 202011453334A CN 112614643 B CN112614643 B CN 112614643B
- Authority
- CN
- China
- Prior art keywords
- coil
- cavity
- superconducting
- vacuum
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Abstract
The invention belongs to the technical field of superconducting magnet application, and relates to a compact superconducting magnet device with a room-temperature magnetic field cavity. The superconducting magnet device comprises a coil annular chamber, a superconducting coil, a shell chamber and other components. The superconducting coil is arranged in an accommodating cavity formed by the coil annular cavity, and the coil annular cavity is arranged in the shell cavity. The superconducting coils are cooled by flowing through a cooling medium in the coil annular chamber, and a vacuum layer between the coil annular chamber and the shell chamber plays a role in heat insulation. The center of the coil can provide a room-temperature magnetic field space. According to the superconducting magnet device, the coil annular chamber extends out of the shell, only one sealing feed-through exists between the coil annular chamber and the environment, the sealing surface is positioned outside the magnet, sealing is easy to realize, and repairability is good.
Description
Technical Field
The invention belongs to the technical field of superconducting magnet application, and particularly relates to a compact superconducting magnet device with a room-temperature magnetic field cavity.
Background
Under the action of a magnetic field environment, the state, structure and property of a substance tend to change significantly. Because the superconducting material has higher current capacity, the superconducting material can provide higher background magnetic field intensity than a normal conductor magnet, and is very helpful to promote the exploration and research of subjects such as physics, chemistry, biology and the like in a high-field environment.
In the prior art, because the superconducting material has superconducting performance only below the critical temperature, the magnetic field space generated by the superconducting magnet is in a low-temperature environment, and a room-temperature magnetic field environment cannot be provided.
In the prior art, strong and weak electric connection and a cooling channel of the superconducting magnet need to be led to a room temperature environment, and a vacuum layer needs to be coated outside the magnet to reduce heat leakage. Two times of sealed feed-through of the superconducting magnet and the vacuum layer, and the vacuum layer and the environment are required to be realized, and the complexity of feed-through realization is increased. Meanwhile, when a feedthrough between the magnet and the vacuum layer fails, the feedthrough is difficult to repair and has poor operation reliability because the feedthrough is positioned inside the whole magnet device. For example, chinese patent application publication No. CN109300646A entitled "coil structure for superconducting magnet and superconducting magnet" uses heat transfer tubes to conduct heat for cooling, and places the device in a cryostat, and the central magnetic field generated by the device is all in a low temperature environment, so that room temperature magnetic field space cannot be obtained.
Disclosure of Invention
The invention aims to provide a compact superconducting magnet device with a room-temperature magnetic field cavity, which is provided with a heat transfer pipe thermally coupled with a coil besides a coil structure for the superconducting magnet so as to provide a room-temperature magnetic field space for other experimental needs needing under a room-temperature magnetic field. Meanwhile, the magnet only has one-time sealing feed-through between the superconducting magnet and the environment, and the sealing surface is positioned outside the magnet, so that the sealing is simple to realize and the repairability is good.
The invention provides a compact superconducting magnet device with a room-temperature magnetic field cavity, which comprises a shell with a vacuum chamber and a superconducting coil; the superconducting coil is arranged in a coil chamber in a shell with a vacuum chamber, a vacuum flange port is arranged on the outer wall of the shell with the vacuum chamber, the vacuum chamber is hermetically connected with a vacuum pump through the vacuum flange port, and an insulating cushion block is arranged in the vacuum chamber of the shell; the coil cavity is communicated with a liquid nitrogen pipeline, and liquid nitrogen passing through the liquid nitrogen pipeline flows through the coil cavity to cool the superconducting coil, so that the superconducting coil has superconducting performance; the superconducting coil is connected with the electric vacuum feed-through piece through the superconducting coil terminal and the electric connecting piece, the superconducting coil is electrified through the electric feed-through piece and the electric connecting piece, the superconducting coil excites a magnetic field in the electrified state, and the magnetic field space is positioned in a cavity in the center of the superconducting coil.
In the superconducting magnet device, the coil chamber extends out of the shell with the vacuum chamber, and the coil chamber is communicated with the extension section cavity.
In the superconducting magnet device, the liquid nitrogen pipeline is wholly or partially corrugated pipe to relieve the thermal stress of the superconducting magnet device in the working process.
In the superconducting magnet device, all or part of the electric connection piece adopts the copper braided belt to relieve the thermal stress of the superconducting magnet device in the working process.
The compact superconducting magnet device with the room-temperature magnetic field cavity has the advantages that:
compared with other superconducting magnet devices, the compact superconducting magnet device with the room-temperature magnetic field cavity has the advantages that the magnetic field space is at room temperature, the coil annular cavity extends out of the shell, only one sealing feed-through exists between the coil annular cavity and the environment, the sealing surface is positioned outside the magnet, sealing is easy to realize, and repairability is good.
Drawings
Fig. 1 is a schematic structural diagram of a compact superconducting magnet device with a room-temperature magnetic field cavity according to the present invention.
Fig. 2 is a schematic external view of the superconducting magnet device of the present invention.
In fig. 1-2, 1 is an electrical vacuum feedthrough, 2 is an electrical connector, 3 is a vacuum flange port, 4 is a housing with a vacuum chamber, 5 is a coil chamber, 6 is an insulating spacer, 7 is a superconducting coil, 8 is an inter-coil terminal, 9 is a superconducting coil terminal, 10 is a liquid nitrogen pipe, 11 is an insulating washer, 12 is an outer wall front end cap, and 13 is a partition.
Detailed Description
The structure of the compact superconducting magnet device with room temperature magnetic field cavity provided by the invention is shown in fig. 1 and fig. 2, and comprises a shell 4 with a vacuum chamber and a superconducting coil 7; the superconducting coil 7 is arranged in a coil chamber 5 in a shell 4 with a vacuum chamber, a vacuum flange port 3 is arranged on the outer wall of the shell 4 with the vacuum chamber, the vacuum chamber is hermetically connected with a vacuum pump (not shown in the figure) through the vacuum flange port 3, and an insulating cushion block 6 is arranged in the vacuum chamber of the shell 4; the coil cavity 5 is communicated with a liquid nitrogen pipeline 10, and liquid nitrogen passing through the liquid nitrogen pipeline 10 flows through the coil cavity 5 to cool the superconducting coil, so that the superconducting coil 7 has superconducting performance; an inter-coil terminal 8 is arranged between coils of the superconducting coil 7, the superconducting coil 7 is connected with the electric vacuum feed-through piece 1 through a superconducting coil terminal 9 and an electric connecting piece 2, the superconducting coil 7 is electrified through the electric feed-through piece 1 and the electric connecting piece 2, the superconducting coil excites a magnetic field in an electrified state, and a magnetic field space is positioned in a cavity in the center of the superconducting coil 7.
In the superconducting magnet device, the coil chamber 5 extends out of the housing 4 with the vacuum chamber, wherein the coil chamber 5 is communicated with the extended-section cavity.
In the superconducting magnet device, the liquid nitrogen pipeline 10 is wholly or partially made of corrugated pipes to relieve the thermal stress of the superconducting magnet device in the working process.
In the superconducting magnet device, the electric connector 2 is wholly or partially made of copper braided belts, so that the thermal stress of the superconducting magnet device in the working process is relieved.
In a compact superconducting magnet device having a room-temperature magnetic field cavity, an electric connector 2 is connected to a superconducting coil terminal 9 of a superconducting coil 7, and the electric connector 2 is guided by an insulating washer 11. The electrical connector 2 is connected to the external electrical vacuum feedthrough 1 using copper braid. The electric vacuum feedthrough 1 is in sealed connection with the outer wall front end cap 12 of the coil chamber 5.
In the superconducting magnet device, a liquid nitrogen pipeline 10 is partially or completely flexibly connected by a corrugated pipe, and the liquid nitrogen pipeline 10 is hermetically connected with a front end cover 12 on the outer wall of a coil chamber. The housing 4 with the vacuum chamber is sealingly connected to a vacuum pump (not shown in the figure) via a vacuum flange port 3.
A compact superconducting magnet apparatus having a room temperature magnetic field cavity according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings: in this embodiment, a single double-pancake superconducting coil is formed by winding a superconducting wire around a coil former. After the four double-pancake coils are wound, a lead led out from each double-pancake coil is welded on a terminal 8 between the coils to assemble a superconducting coil body, and the end parts of the four superconducting coils 7 are welded with superconducting coil terminals 9. The superconducting coil body which is wound and welded is assembled in the coil cavity 5, an insulating support plate (not shown in the figure) is padded between the cavities at the lower part of the superconducting coil body, a magnet current terminal is supported and fixed on the insulating support plate by utilizing a countersunk head screw for fastening connection, and the insulating support plate plays a role in preventing short circuit and heat leakage. The region inside the coil chamber 5 serves as a passage for the cooling medium in addition to the placement of the superconducting coil 7, and in the present embodiment, supercooled liquid nitrogen is used as the cooling superconducting coil 7. The electric connector 2 is connected with the superconducting coil terminal 9 through a screw, the electric connector 2 is fixed with a partition plate through an insulating gasket, the partition plate does not play a role in isolation and sealing and only serves as a supporting structure of the electric connector 2 and a liquid nitrogen pipeline 10, wherein a cavity where the coil is located is communicated with an extension section cavity. The electrical connector 2 is connected to the electrical vacuum feedthrough 1 by a flexible connection, in this embodiment a copper braid is used as the flexible connection, and both ends of the copper braid are welded to the electrical connector 2 and the electrical vacuum feedthrough 1, respectively. The copper braided belt has certain telescopic capacity, and can relieve thermal stress caused by mismatching of thermal expansion coefficients of materials in the cooling process of the magnet. The liquid nitrogen channel 10 and the partition plate 13 are connected in a welding mode, wherein the liquid nitrogen pipeline is partially or completely in flexible connection, in the embodiment, the liquid nitrogen pipeline 10 is partially in flexible connection through a corrugated pipe, and the corrugated pipe has certain telescopic capacity and can relieve thermal stress caused by mismatching of thermal expansion coefficients of materials in the cooling process of the magnet. The electric vacuum feedthrough piece 1 is connected with the front end cover 12 of the outer wall of the annular chamber of the coil in a vacuum manner, KF flange connection is adopted in the embodiment, the liquid nitrogen pipeline 10 is connected with the front end face of the annular chamber of the coil in a vacuum manner, and welding connection is adopted in the embodiment. Coil annular chamber stretches out terminal surface before the shell cavity forms coil annular chamber, and liquid nitrogen pipeline 10 and electric vacuum are presented and are worn piece 1 and all carry out sealing connection with terminal surface before the coil annular chamber, and sealed face all is located the magnet outside, and sealed realization is simple, and the leak hunting operation is realized easily, and the vacuum goes wrong and can in time be restoreed, and operating stability is high. The inside of the coil chamber extension section can be filled with materials such as foam and the like, so that on one hand, liquid nitrogen is prevented from entering the area; on the other hand, the heat insulation effect is achieved, the thermal resistance between the liquid nitrogen and the front end face of the coil cavity is increased, and heat leakage is reduced. In this embodiment, the filling material is rigid foam. The vacuum flange port 3 is connected to the outer wall of the vacuum chamber 4 by welding, and in this embodiment, the vacuum flange port 3 is used for vacuum pumping to reduce the absolute pressure between the outer vacuum chamber 4 and the coil chamber 5, thereby reducing heat leakage.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.
The compact superconducting magnet device with the room-temperature magnetic field cavity provided by the invention has the following working principle:
the invention relates to a compact superconducting magnet device with a room-temperature magnetic field cavity, which mainly comprises a coil chamber, a vacuum chamber, a superconducting coil, a liquid nitrogen pipeline, an electric channel and the like. When the superconducting coil works, liquid nitrogen is input into the coil cavity 5 through one liquid nitrogen pipeline 10 and output through the other liquid nitrogen pipeline, the liquid nitrogen flows through the coil cavity 5 to cool the superconducting coil 7, so that the superconducting coil 7 is reduced to 77K or below, and the superconducting coil 7 has superconducting performance. In operation, because the entire coil chamber 5 is at a relatively low temperature, it is necessary to evacuate the thin-film space between the coil chamber and the vacuum chamber to reduce heat leakage from the external environment to the liquid nitrogen chamber. When the device works, the electric feedthrough piece 1 and the electric connector 2 are used for electrifying the superconducting coil 7, the superconducting coil 7 can excite a magnetic field in an electrified state, a main magnetic field space is positioned in a cavity in the center of the superconducting coil 7, and meanwhile, the magnetic field space can be positioned in a room-temperature environment due to the heat insulation effect of the vacuum cavity, so that the device provides a room-temperature magnetic field cavity.
The liquid nitrogen pipeline in the superconducting magnet device can be wholly or partially made of corrugated pipes, and the corrugated pipes have certain expansion capacity and can relieve thermal stress caused by mismatching of thermal expansion coefficients of all materials in the magnet cooling process.
The electric connector can wholly or partially adopt a copper woven belt, the copper woven belt has certain telescopic capacity, and thermal stress caused by mismatching of thermal expansion coefficients of materials in the magnet cooling process can be relieved.
Claims (1)
1. A compact superconducting magnet device with a room temperature magnetic field cavity is characterized in that the superconducting magnet device comprises a shell with a vacuum chamber and a superconducting coil; the superconducting coil is arranged in a coil cavity in the shell with the vacuum cavity, a vacuum flange port is arranged on the outer wall of the shell with the vacuum cavity, the vacuum cavity is hermetically connected with a vacuum pump through the vacuum flange port, and an insulating cushion block is arranged in the vacuum cavity of the shell; the coil cavity is communicated with a liquid nitrogen pipeline, and liquid nitrogen passing through the liquid nitrogen pipeline flows through the coil cavity to cool the superconducting coil, so that the superconducting coil has superconducting performance; an inter-coil terminal is arranged between coils of the superconducting coil, the superconducting coil is flexibly connected with the electric vacuum feedthrough piece through the superconducting coil terminal and the electric connector, the superconducting coil is electrified through the electric vacuum feedthrough piece and the electric connector, the superconducting coil excites a magnetic field in an electrified state, and a magnetic field space is positioned in a cavity in the center of the superconducting coil; the coil chamber extends out of the shell with the vacuum chamber to form a coil chamber front end face located outside the vacuum chamber, wherein the coil chamber is communicated with the extension section cavity; the liquid nitrogen pipeline penetrates through the front end face of the coil cavity and is connected with the front end face of the coil cavity in a sealing mode, the electric vacuum feedthrough penetrates through the front end face of the coil cavity and is connected with the electric connecting piece in the coil cavity, the electric vacuum feedthrough is connected with the front end face of the coil cavity in a sealing mode, and the liquid nitrogen pipeline wholly or partially adopts a corrugated pipe to relieve thermal stress of the superconducting magnet device in the working process; the electric connection piece is wholly or partially made of copper braided belts, so that the thermal stress of the superconducting magnet device in the working process is relieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011453334.6A CN112614643B (en) | 2020-12-11 | 2020-12-11 | Compact superconducting magnet device with room temperature magnetic field cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011453334.6A CN112614643B (en) | 2020-12-11 | 2020-12-11 | Compact superconducting magnet device with room temperature magnetic field cavity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112614643A CN112614643A (en) | 2021-04-06 |
| CN112614643B true CN112614643B (en) | 2022-10-28 |
Family
ID=75233137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011453334.6A Active CN112614643B (en) | 2020-12-11 | 2020-12-11 | Compact superconducting magnet device with room temperature magnetic field cavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112614643B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101728051A (en) * | 2010-02-03 | 2010-06-09 | 中国科学院电工研究所 | High-field superconducting magnet system with wide separation gaps |
| CN112017838A (en) * | 2020-07-28 | 2020-12-01 | 北京控制工程研究所 | Superconducting system for high-power additional field magnetic plasma power thruster |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH456792A (en) * | 1966-09-28 | 1968-07-31 | Siemens Ag | Superconducting coil |
| JP2007103661A (en) * | 2005-10-04 | 2007-04-19 | Sumitomo Heavy Ind Ltd | Superconductive magnet device |
| CN101221848B (en) * | 2007-12-10 | 2011-09-21 | 北京英纳超导技术有限公司 | High-temperature superconductive lead wire |
| CN103116147B (en) * | 2013-02-26 | 2015-11-25 | 江苏美时医疗技术有限公司 | A kind of knee radiofrequency coil for magnetic resonance imaging system |
| CN109686528B (en) * | 2018-12-18 | 2020-08-11 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | High-temperature superconducting energy storage magnet device |
| CN110491668B (en) * | 2019-08-20 | 2021-01-29 | 清华大学 | Method for winding superconducting coil by using delaminating superconducting strip |
-
2020
- 2020-12-11 CN CN202011453334.6A patent/CN112614643B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101728051A (en) * | 2010-02-03 | 2010-06-09 | 中国科学院电工研究所 | High-field superconducting magnet system with wide separation gaps |
| CN112017838A (en) * | 2020-07-28 | 2020-12-01 | 北京控制工程研究所 | Superconducting system for high-power additional field magnetic plasma power thruster |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112614643A (en) | 2021-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5737927A (en) | Cryogenic cooling apparatus and cryogenic cooling method for cooling object to very low temperatures | |
| US8658891B2 (en) | Stop joint for a superconducting cable | |
| US20080115510A1 (en) | Cryostats including current leads for electronically powered equipment | |
| US8923939B2 (en) | Superconduction apparatus | |
| CN103456455A (en) | Superconducting magnet current lead | |
| WO2017057760A1 (en) | Superconducting magnet device and superconducting magnet excitation implement | |
| CN109273193B (en) | Current lead structure and superconducting magnet | |
| CN112614643B (en) | Compact superconducting magnet device with room temperature magnetic field cavity | |
| CN109243754B (en) | Current lead structure and superconducting magnet | |
| CN109300646B (en) | Coil structure for superconducting magnet and superconducting magnet | |
| CN102262952B (en) | Conduction cooling superconducting magnet device | |
| JP4658839B2 (en) | Electrical connection structure for superconducting members | |
| US5369387A (en) | Shim lead power coupling assembly for superconducting magnet | |
| JP6104007B2 (en) | Current supply device | |
| WO2020114066A1 (en) | Pluggable current lead structure and superconducting magnet | |
| CN110998759B (en) | Superconducting magnet with cold head thermal path cooled by heat exchanger | |
| JP2013143478A (en) | Superconducting magnet device and current lead used in the same | |
| WO2022077568A1 (en) | Single-ended downstream refrigerating system for superconducting cable | |
| CN114204513A (en) | Terminal structure of conduction cooling high-temperature superconducting cable | |
| JPH08196029A (en) | End connecting device for cryoresistive cable | |
| JPH10256027A (en) | Superconducting magnet system | |
| JP6172979B2 (en) | Superconducting device | |
| CN105761904A (en) | Transformer with cooling structure | |
| CN112271052A (en) | Superconducting magnet cryogenic system | |
| CN110323585A (en) | A kind of vertical connection structure of terminal of three-phase same core hyperconductive cable and superconductive current limiter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |