CN201104046Y - Non-evaporation self-liquid helium supplying superconducting magnet Dewar - Google Patents
Non-evaporation self-liquid helium supplying superconducting magnet Dewar Download PDFInfo
- Publication number
- CN201104046Y CN201104046Y CNU2007200444008U CN200720044400U CN201104046Y CN 201104046 Y CN201104046 Y CN 201104046Y CN U2007200444008 U CNU2007200444008 U CN U2007200444008U CN 200720044400 U CN200720044400 U CN 200720044400U CN 201104046 Y CN201104046 Y CN 201104046Y
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- helium
- housing
- superconducting magnet
- liquid helium
- thermal radiation
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Abstract
The utility model discloses a free-evaporation liquid helium self-supplying superconduction magnet Dewar which is provided with a G-M cooler, wherein, the lower part of the G-M cooler is connected with a vacuum housing, a primary cold finger and a secondary cold finger are connected with a heatproof radiation shield housing and a helium condensation cavity housing in sequence; a heat exchange pipe is circled the outside of the heatproof radiation shield housing, one end of the heat exchange pipe goes through the vacuum housing and is communicated with the external helium source, the other end of the heat exchange pipe is communicated with the helium condenser and reaches the inner part of the helium condensation cavity housing; the bottom of the helium condensation cavity housing is provided with an immersion superconducting magnet. The utility model adopts the cooled helium to cool the natural current heat exchange cooling immersion superconducting magnet until the magnet is at the temperature of liquid helium. When the liquid helium is up to the necessary mass, the replenishment of helium is stopped, the superconducting magnet system can keep the subpressure running and the liquid helium mass is not changed, thereby realizing the free evaporation. If the helium is continued to be supplemented, the G-M cooler can liquefy the supplemented helium, thereby realizing the self-supply of liquid helium.
Description
Technical field
The utility model belongs to refrigeration plant and cryogenic technique, specifically is a kind of superconducting magnet dewar of zero evaporation confession liquid helium.
Background technology
The G-M circulation is by Ji Fute (Gifford) and McMahon (Mcmahon) two people invention, and its principle is an adiabatic gas venting refrigeration.G-M type refrigeration machine has been widely used in cooling off various small-sized superconducting magnets at present.How to produce liquid helium be still to fail to solve the difficult point problem but how G-M type refrigeration machine directly is cooled to liquid helium temperature and G-M type refrigeration machine from room temperature with the immersion type superconducting magnet.
The utility model content:
The purpose of this utility model provides a kind of superconducting magnet dewar of zero evaporation confession liquid helium, and can produce liquid helium, has solved the technical problem that the immersion type superconducting magnet directly is cooled to liquid helium temperature and how produces liquid helium from room temperature.
The technical solution of the utility model is as follows:
The superconducting magnet dewar of zero evaporation confession liquid helium, include the G-M refrigeration machine, it is characterized in that described G-M refrigeration machine motor lower portion is connected with vacuum casting, one-level cold head and secondary cold head are externally connected with thermal radiation resistant screen housing, secondary cold head front end is connected with the helium condenser, the secondary cold head is externally connected with helium condensation chamber housing, and thermal radiation resistant screen case cover is outside helium condensation chamber housing, and vacuum casting covers on outside the thermal radiation resistant screen housing; Thermal radiation resistant screen housing is surrounded with heat exchanger tube outward, and heat exchanger tube one end passes vacuum casting and outside helium gas source UNICOM, and the heat exchanger tube other end is passed into the helium condenser, arrives in the helium condensation chamber housing; Helium condensation chamber housing bottom is placed with the immersion type superconducting magnet; Helium condensation chamber housing is connected with pipeline and passes thermal radiation resistant screen housing, vacuum casting arrival outside.
The utility model utilizes the one-level cold head of G-M refrigeration machine to do thermal radiation resistant screen, the helium that precooling simultaneously replenishes from the external world; The helium cooling that the secondary cold head of G-M refrigeration machine will replenish from the external world, cooled helium arrives liquid helium temperature by to spontaneous current heat exchange cooling immersion type superconducting magnet until it.After liquid helium reaches required quality, stop to replenish helium, superconducting magnet system can be kept the negative pressure operation and the liquid helium mass conservation has promptly been realized zero evaporation.If continuation replenishes helium, the G-M refrigeration machine can promptly have been realized the confession liquid helium with the helium liquefaction that replenishes.
Description of drawings
Fig. 1 is the utility model structural representation.
The specific embodiment
The superconducting magnet dewar of zero evaporation confession liquid helium, include G-M refrigeration machine 1, described G-M refrigeration machine 1 motor lower portion is connected with vacuum casting 2, one-level cold head 3 and secondary cold head 9 are externally connected with thermal radiation resistant screen housing 5, secondary cold head 9 front ends are connected with helium condenser 7, secondary cold head 9 is externally connected with helium condensation chamber housing 6, and thermal radiation resistant screen housing 5 covers on outside the helium condensation chamber housing 6, and vacuum casting 2 covers on outside the thermal radiation resistant screen housing 5; The thermal radiation resistant screen housing 5 outer heat exchanger tubes 4 that are surrounded with, heat exchanger tube 4 one ends pass vacuum casting 2 and outside helium gas source UNICOM, and heat exchanger tube 4 other ends are passed in the helium condensation chamber housing 6; Helium condensation chamber housing 6 bottoms are placed with immersion type superconducting magnet 11; Helium condensation chamber housing 6 is connected with pipeline and passes thermal radiation resistant screen housing 5, vacuum casting 2 arrival outsides.
The room temperature helium enters Tube Sheet of Heat Exchanger 4 by helium inlet 8, is entered helium condenser 7 after 5 coolings of thermal radiation resistant screen housing, is flowed out by helium out 10.Cold helium is above helium condensation chamber housing 6, and liquid helium is in helium condensation chamber housing 6 bottoms.
Claims (1)
1, the superconducting magnet dewar of zero evaporation confession liquid helium, include the G-M refrigeration machine, it is characterized in that described G-M refrigeration machine motor lower portion is connected with vacuum casting, one-level cold head and secondary cold head are externally connected with thermal radiation resistant screen housing, secondary cold head front end is connected with the helium condenser, the secondary cold head is externally connected with helium condensation chamber housing, and thermal radiation resistant screen case cover is outside helium condensation chamber housing, and vacuum casting covers on outside the thermal radiation resistant screen housing; Thermal radiation resistant screen housing is surrounded with heat exchanger tube outward, and heat exchanger tube one end passes vacuum casting and outside helium gas source UNICOM, and the heat exchanger tube other end is passed into the helium condenser, arrives in the helium condensation chamber housing; Helium condensation chamber housing bottom is placed with the immersion type superconducting magnet; Helium condensation chamber housing is connected with pipeline and passes thermal radiation resistant screen housing, vacuum casting arrival outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200444008U CN201104046Y (en) | 2007-09-30 | 2007-09-30 | Non-evaporation self-liquid helium supplying superconducting magnet Dewar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200444008U CN201104046Y (en) | 2007-09-30 | 2007-09-30 | Non-evaporation self-liquid helium supplying superconducting magnet Dewar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201104046Y true CN201104046Y (en) | 2008-08-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200444008U Expired - Fee Related CN201104046Y (en) | 2007-09-30 | 2007-09-30 | Non-evaporation self-liquid helium supplying superconducting magnet Dewar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201104046Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104299748A (en) * | 2014-08-12 | 2015-01-21 | 北京航空航天大学 | Dewar system for high-temperature superconducting magnetic suspension energy storage flywheel |
| CN104317336A (en) * | 2014-09-30 | 2015-01-28 | 西部超导材料科技股份有限公司 | Pressure control apparatus and control method of low-temperature working medium immersion type superconducting magnet |
| CN106767994A (en) * | 2015-11-23 | 2017-05-31 | 北京航天试验技术研究所 | A kind of seal test device suitable for liquid hydrogen warm area |
| CN109799260A (en) * | 2019-03-01 | 2019-05-24 | 中国科学院理化技术研究所 | A kind of multi-state continuously switches hydrogen thermal siphon experimental system |
-
2007
- 2007-09-30 CN CNU2007200444008U patent/CN201104046Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104299748A (en) * | 2014-08-12 | 2015-01-21 | 北京航空航天大学 | Dewar system for high-temperature superconducting magnetic suspension energy storage flywheel |
| CN104299748B (en) * | 2014-08-12 | 2016-08-17 | 北京航空航天大学 | A kind of high temperature superconducting magnetic suspension energy accumulation flywheel Dewar system |
| CN104317336A (en) * | 2014-09-30 | 2015-01-28 | 西部超导材料科技股份有限公司 | Pressure control apparatus and control method of low-temperature working medium immersion type superconducting magnet |
| CN104317336B (en) * | 2014-09-30 | 2017-01-11 | 西部超导材料科技股份有限公司 | Control method of pressure control apparatus of low-temperature working medium immersion type superconducting magnet |
| CN106767994A (en) * | 2015-11-23 | 2017-05-31 | 北京航天试验技术研究所 | A kind of seal test device suitable for liquid hydrogen warm area |
| CN109799260A (en) * | 2019-03-01 | 2019-05-24 | 中国科学院理化技术研究所 | A kind of multi-state continuously switches hydrogen thermal siphon experimental system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080820 Termination date: 20110930 |