CN109036757B - Telescopic structure suspender with low cold loss of cold shield of small and medium superconducting magnet device - Google Patents
Telescopic structure suspender with low cold loss of cold shield of small and medium superconducting magnet device Download PDFInfo
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- CN109036757B CN109036757B CN201810777535.8A CN201810777535A CN109036757B CN 109036757 B CN109036757 B CN 109036757B CN 201810777535 A CN201810777535 A CN 201810777535A CN 109036757 B CN109036757 B CN 109036757B
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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
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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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Abstract
The invention discloses a telescopic structure suspender with low cold loss of a cold shield of a small and medium-sized superconducting magnet device, which comprises a low-temperature connecting seat arranged on the bottom surface of a cold shield top plate and a room-temperature connecting seat arranged on the bottom surface of a Dewar top plate, wherein a stainless steel sleeve rod is sleeved in the room-temperature connecting seat, and the lower end of the stainless steel sleeve rod is fixedly connected with a stop block; the low-temperature connecting seat is sleeved with an epoxy rod, and the bottom end of the epoxy rod sequentially penetrates through the cold shield top plate and the stainless steel sleeve rod and then extends into the blocking block and is fixed in the blocking block. The invention is suitable for hoisting the cold shield of the small and medium-sized superconducting magnet device. The telescopic rod structure component made of the epoxy material and the stainless steel material with small heat conductivity coefficient can ensure that the heat leakage of the suspender component is more than several times smaller than that of a suspender made by a common method. The invention has the advantages of simple structural design, easy processing, convenient installation, small heat leakage and the like, and is applied to the microwave heating magnet, and the lowest temperature of the cold shield is less than 50K.
Description
The technical field is as follows:
the invention relates to the technical field of superconduction, in particular to a telescopic-structure suspender with low cold loss of a cold shield of a small and medium-sized superconducting magnet device.
Background art:
the superconducting magnet device generally has the working temperature of less than 20K, and conducts and cools a multi-choice refrigerator for small and medium-sized superconducting magnets because the refrigerating mode has the characteristics of high efficiency, compact structure, flexible installation position and the like. In order to effectively reduce the heat radiation of the inner surface of the dewar to the superconducting magnet, improve the utilization efficiency of the cold energy of the cryogenic system and ensure that the temperature of the superconducting magnet can be kept in a required temperature region, a cold shield is generally arranged between the superconducting magnet and the dewar.
The cold shield material is mainly made of copper, aluminum and other metals with good heat conductivity. In order to ensure the normal operation of the superconducting magnet, the cold shield not only structurally meets the strength requirement, but also controls the heat leakage of the cold shield within an acceptable range.
There are generally three sources of cold shield steady state heat leakage, namely residual gas heat leakage, radiant heat leakage and firmware conduction heat leakage. The fastener as one of the main heat leakage modes conducts heat leakage, and generally, a suspender is directly made of a material with small heat conductivity coefficient and is connected with a high-temperature end and a low-temperature end. In order to reduce conduction heat leakage, the invention discloses a telescopic structure suspender with a cold shield and low cold loss of a small superconducting magnet device. The design can effectively increase the length of the suspender by several times, and can ensure that the conduction heat leakage of the firmware is less than that of the suspender of the common method by more than several times under the conditions of the same radius and the same temperature difference. So as to improve the utilization efficiency of the system cold energy.
The invention content is as follows:
the invention provides a novel design of a telescopic structure suspender with low cold loss of a cold shield of a small and medium-sized superconducting magnet device, which can ensure that the heat leakage of a suspender component is more than several times smaller than that of a suspender prepared by a common method.
The invention is realized by the following technical scheme:
the utility model provides a low cold volume loss's of cold screen intussusception structure jib of middle-size and small-size superconducting magnet device, its characterized in that: the low-temperature connection base is arranged on the bottom surface of the top plate of the cold shield, and the room-temperature connection base is arranged on the bottom surface of the dewar top plate, and the dewar top plate is positioned above the top of the cold shield; a hollow longitudinal stainless steel sleeve rod is sleeved in the low-temperature connecting seat, and a hollow stop block is fixedly connected to the lower end of the stainless steel sleeve rod; the room temperature connecting seat is sleeved with a longitudinal epoxy rod, and the bottom end of the epoxy rod sequentially penetrates through the cold shield top plate and the stainless steel sleeve rod, then extends into the blocking block and is fixed in the blocking block through a locking nut.
The utility model provides a low cold volume loss's of cold screen intussusception structure jib of middle-size and small-size superconducting magnet device, its characterized in that: the length of the epoxy rod is greater thanL+H, wherein LIs half of the height of the cold shield cylinder body,Hthe distance from the top plate of the cold shield to the top plate of the dewar.
Small and medium-sized superconducting magnet devicePut the telescoping structure jib of cold volume loss of cold screen low, its characterized in that: the diameter of the epoxy rod isR，The inner diameter of the stainless steel sleeve rod isR+3mm, the wall thickness is 3~5mm, and epoxy pole both ends all are equipped with the screw thread section.
The utility model provides a low cold volume loss's of cold screen intussusception structure jib of middle-size and small-size superconducting magnet device, its characterized in that: the dog is square dog, and the epoxy pole bottom is fixed at square dog position through two lock nut.
The utility model provides a low cold volume loss's of cold screen intussusception structure jib of middle-size and small-size superconducting magnet device, its characterized in that: the stainless steel sleeve rod is screwed in the room-temperature connecting seat through threads, and the epoxy rod is screwed in the low-temperature connecting seat through threads.
The cold shield is hung in the Dewar by the invention.
Both ends of the epoxy rod are threaded for assembly.
One end of the stainless steel sleeve rod is a threaded connector, and the other end of the stainless steel sleeve rod is welded with a hollow square baffle.
One end of the epoxy rod is fixed on the room temperature connecting seat (the room temperature connecting seat is fixed on the Dewar roof) through threads; the stainless steel sleeve rod penetrates through the epoxy rod and is fixed on the low-temperature connecting seat through a threaded end (the low-temperature connecting seat is fixed on a cold screen top plate); then the other end of the epoxy rod is fixed at the position of the hollow square stop block of the sleeve rod through two locking nuts.
The position height of the cold shield in the Dewar can be adjusted through the locking nut.
The invention is suitable for hoisting the cold shield of the small and medium-sized superconducting magnet device. The telescopic rod structure component made of the epoxy material and the stainless steel material with small heat conductivity coefficient can ensure that the heat leakage of the suspender component is more than several times smaller than that of a suspender made by a common method.
The invention has the advantages that:
the telescopic rod structure component is made of the epoxy material with small heat conductivity coefficient and the stainless steel material, and the common method of directly using the epoxy material to make the suspension rod is broken through. The heat leakage of the suspender component can be ensured to be more than several times smaller than that of the suspender in the common method. The microwave heating magnet has the advantages of simple structural design, easiness in processing, convenience in installation, small heat leakage and the like, and is applied to the microwave heating magnet, and the lowest temperature of the cold shield is less than 50K.
Description of the drawings:
fig. 1 is a schematic view of the assembled structure of the present invention.
Fig. 2 is an enlarged view of a portion a.
The specific implementation mode is as follows:
see the drawings.
A telescopic structure suspender with low cold loss of a cold shield of a small and medium-sized superconducting magnet device comprises a low-temperature connecting seat 4 arranged on the bottom surface of a cold shield top plate 3 and a room-temperature connecting seat 1 arranged on the bottom surface of a Dewar top plate 8, wherein the Dewar top plate 8 is positioned above the cold shield top plate 3; a hollow longitudinal stainless steel sleeve rod 5 is sleeved in the low-temperature connecting seat 4, and a hollow stop block 6 is fixedly connected to the lower end of the stainless steel sleeve rod 5; the room temperature connecting seat 1 is internally sleeved with a longitudinal epoxy rod 2, and the bottom end of the epoxy rod 2 sequentially penetrates through the cold shield top plate 3 and the stainless steel sleeve rod 5, then extends into the stop block and is fixed in the stop block 6 through a locking nut 7.
The length of the epoxy rod is greater thanL+H, wherein LIs half of the height of the cold shield cylinder body,Hthe distance from the top plate of the cold shield to the top plate of the dewar.
The diameter of the epoxy rod isR，The inner diameter of the stainless steel sleeve rod isR+3mm, the wall thickness is 3~5mm, and epoxy pole both ends all are equipped with the screw thread section.
The dog is square dog, and epoxy rod bottom is fixed at square dog position through two lock nut.
A telescopic structure suspender with low cold loss of a cold shield of a small and medium superconducting magnet device mainly comprises an epoxy rod with a small heat conductivity coefficient and a stainless steel sleeve rod which are connected through threads.
And the room temperature connecting seat 1 and the low temperature connecting seat 4 are respectively fixed on the Dewar top plate and the cold shield top plate 3.
And (3) penetrating the epoxy rod 2 through the cold shield top plate 3, and fixing the epoxy rod on the room temperature connecting seat 1 through threads. Welding the hollow square stop block 6 at one end of the stainless sleeve rod 5; the stainless steel sleeve rod 5 is then threaded through the epoxy rod 2 and secured to the cryostat holder 4 by a threaded end. And finally, the other end of the epoxy rod 2 is fixed at the position of a hollow square stop block 6 of the sleeve rod through two locking nuts 7. The position height of the cold shield in the Dewar can be adjusted by the locking nut 7.
Claims (1)
1. The utility model provides a low cold volume loss's of cold screen intussusception structure jib of middle-size and small-size superconducting magnet device, its characterized in that: the low-temperature connection base is arranged on the bottom surface of the top plate of the cold shield, and the room-temperature connection base is arranged on the bottom surface of the dewar top plate, and the dewar top plate is positioned above the top of the cold shield; a hollow longitudinal stainless steel sleeve rod is sleeved in the low-temperature connecting seat, and a hollow stop block is fixedly connected to the lower end of the stainless steel sleeve rod; a longitudinal epoxy rod is sleeved in the room temperature connecting seat, and the bottom end of the epoxy rod sequentially penetrates through the cold shield top plate and the stainless steel sleeve rod, then extends into the blocking block and is fixed in the blocking block through a locking nut;
the length of the epoxy rod is greater than L + H, wherein L is half of the height of the cold shield cylinder, and H is the distance from the cold shield top plate to the Dewar top plate;
the diameter of the epoxy rod is R, the inner diameter of the stainless steel sleeve rod is R +3mm, the wall thickness is 3-5 mm, and both ends of the epoxy rod are provided with thread sections;
the check block is a square check block, and the bottom end of the epoxy rod is fixed at the position of the square check block through two locking nuts;
the stainless steel sleeve rod is screwed in the room-temperature connecting seat through threads, and the epoxy rod is screwed in the low-temperature connecting seat through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810777535.8A CN109036757B (en) | 2018-07-16 | 2018-07-16 | Telescopic structure suspender with low cold loss of cold shield of small and medium superconducting magnet device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810777535.8A CN109036757B (en) | 2018-07-16 | 2018-07-16 | Telescopic structure suspender with low cold loss of cold shield of small and medium superconducting magnet device |
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| Publication Number | Publication Date |
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| CN109036757A CN109036757A (en) | 2018-12-18 |
| CN109036757B true CN109036757B (en) | 2020-08-25 |
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| CN201810777535.8A Active CN109036757B (en) | 2018-07-16 | 2018-07-16 | Telescopic structure suspender with low cold loss of cold shield of small and medium superconducting magnet device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113586940B (en) * | 2021-07-30 | 2023-08-18 | 中科富海(中山)低温装备制造有限公司 | Liquid nitrogen cold screen structure |
| CN114724796A (en) * | 2022-06-09 | 2022-07-08 | 山东奥新医疗科技有限公司 | Magnetic resonance superconducting magnet with novel structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101307862A (en) * | 2008-05-12 | 2008-11-19 | 中国科学院等离子体物理研究所 | Conduction cooling superconducting magnet dewar convenient for loading and unloading |
| CN102226953A (en) * | 2011-03-30 | 2011-10-26 | 中国科学院电工研究所 | Pull rod for spatial superconducting magnets |
| CN104565160A (en) * | 2014-10-23 | 2015-04-29 | 中国科学院高能物理研究所 | Displacement self-compensation damping mechanism of draw bar and hoisting structure of superconducting magnet |
| CN104779032A (en) * | 2015-05-07 | 2015-07-15 | 奥泰医疗系统有限责任公司 | Pull rod structure of low-temperature container |
| CN105070458A (en) * | 2015-08-31 | 2015-11-18 | 中国科学院合肥物质科学研究院 | High-strength and low-heat-leakage superconducting magnet supporting device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56152212A (en) * | 1980-04-28 | 1981-11-25 | Japanese National Railways<Jnr> | Superconductive coil |
| JPS5827384A (en) * | 1981-08-10 | 1983-02-18 | Mitsubishi Electric Corp | Cryostat |
| JP2841695B2 (en) * | 1990-04-25 | 1998-12-24 | 株式会社島津製作所 | Cryogenic container for superconducting magnet of nuclear magnetic resonance tomography |
| CN201936715U (en) * | 2010-12-13 | 2011-08-17 | 中国船舶重工集团公司第七研究院 | Low-temperature superconducting magnet low-thermal-leakage suspension rod structure |
| CN203260446U (en) * | 2013-06-04 | 2013-10-30 | 宁波健信机械有限公司 | Nuclear magnetic resonance imaging system superconducting magnet low-temperature container pull rod |
| CN103426588B (en) * | 2013-09-02 | 2015-11-18 | 中国科学院电工研究所 | A kind of pull rod device of superconducting magnet |
| CN103903830B (en) * | 2014-03-10 | 2016-05-18 | 中国科学院等离子体物理研究所 | Cold supporting construction in superconducting magnet feeder system |
-
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- 2018-07-16 CN CN201810777535.8A patent/CN109036757B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101307862A (en) * | 2008-05-12 | 2008-11-19 | 中国科学院等离子体物理研究所 | Conduction cooling superconducting magnet dewar convenient for loading and unloading |
| CN102226953A (en) * | 2011-03-30 | 2011-10-26 | 中国科学院电工研究所 | Pull rod for spatial superconducting magnets |
| CN104565160A (en) * | 2014-10-23 | 2015-04-29 | 中国科学院高能物理研究所 | Displacement self-compensation damping mechanism of draw bar and hoisting structure of superconducting magnet |
| CN104779032A (en) * | 2015-05-07 | 2015-07-15 | 奥泰医疗系统有限责任公司 | Pull rod structure of low-temperature container |
| CN105070458A (en) * | 2015-08-31 | 2015-11-18 | 中国科学院合肥物质科学研究院 | High-strength and low-heat-leakage superconducting magnet supporting device |
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| CN109036757A (en) | 2018-12-18 |
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