CN103647541B - Superconducting switch with radiation shielding cylinder - Google Patents
Superconducting switch with radiation shielding cylinder Download PDFInfo
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- CN103647541B CN103647541B CN201310586086.6A CN201310586086A CN103647541B CN 103647541 B CN103647541 B CN 103647541B CN 201310586086 A CN201310586086 A CN 201310586086A CN 103647541 B CN103647541 B CN 103647541B
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Abstract
A superconducting switch with a radiation shielding cylinder includes a superconducting switch body (1) and a radiation shielding cylinder (2). The superconducting switch body (1) is placed in the middle of the radiation shielding cylinder (2) and has no direct contact with the radiation shielding cylinder (2). The superconducting switch body (1) is fixed (2) on an inner bottom surface of the radiation shielding cylinder (2) through a connecting rod (7). The radiation shielding cylinder (2) is closely connected onto a superconducting magnet via fixing holes (9) on skirts, so that the temperature of the radiation shielding cylinder (2) can be sufficiently cooled down to almost the same as that of the superconducting magnet. The radiation shielding cylinder (2) shields all externally radiated heat to the superconducting switch body (1), and thus the superconducting switch body (1) can be sufficiently cooled down simply by use of the connecting rod (7) poor in thermal conductance.
Description
Technical field
The present invention relates to a kind of superconducting magnet superconducting switch, more particularly to a kind of to continue for conduction cooling superconducting magnet
The superconducting switch of current-mode work.
Background technology
Conduction cooling superconducting magnet unique advantage makes its application more and more extensively, and gradually substituted liquid helium soaks superconducting magnet
Gesture.Different from traditional liquid helium immersion superconducting magnet system, conduction cooling superconducting magnet does not use liquid helium to cool down, but makes
With two stage cooler superconducting magnet is cooled down as low-temperature receiver.After conduction cooling superconducting magnet charges and finishes, generally require
Persistent current form operation is carried out with superconducting switch and superconducting coil composition closed loop, can so make superconducting magnet obtain pole
The magnetic field of high stability, can also reduce impact of the outside noise to superconducting magnet system, improve magnet reliability of operation.Can
See in conduction cooling superconducting magnet application, superconducting switch is an important part.
Superconducting switch is usually superconducting switch is turned from without hindrance state using the conversion of the superconducting state-normal state of superconductor
To there is resistance state, reaching makes circuit by the purpose for being conducting to disconnection；Correspond using the normal state-superconducting state of superconductor
Conversion realizing the conducting of circuit.The conversion of superconducting switch superconducting state-normal state and normal state-superconducting state, general employing changes
Become the temperature or background magnetic field of superconductor realizing the conversion between superconducting state and normal state, corresponding two kinds of superconductions
Switch is referred to as temperature control superconducting switch and magnetic control superconducting switch.Wherein, temperature control superconducting switch structure is relatively easy, actual to answer
It is the most extensive with.
In conduction cooling superconducting magnet system, superconducting magnet and superconducting switch will be cooled down by refrigeration machine, and be freezed
Machine refrigerating capacity at a certain temperature is a determination value.Therefore superconducting switch with the thermally coupled between superconducting magnet exist contradiction because
Element：On the one hand, good thermally coupled sufficiently cool can realize superconducting state to guarantee superconducting switch；But then, superconduction is worked as
Switch needs good heat-insulated to guarantee superconducting switch to superconducting magnetic when normal state, between superconducting switch and superconducting magnet
The conduction heat of body is as little as possible, will not cause quenching for superconducting magnet.
The content of the invention
Contradictory factor in order to solve thermally coupled presence between above-mentioned conduction cooling superconducting magnet and superconducting switch of the invention,
Propose a kind of superconducting switch with radiation shield cylinder.
The thermic load of superconducting switch is essentially from extraneous radiant heat in conduction cooling superconducting magnet system.If by superconduction
Switch is positioned in a shielding cylinder with superconducting magnet isothermal and can just mask all radiant heat for flowing to superconducting switch, then
Just superconducting switch can be cooled down using weaker thermally coupled.So make its turn when heater strip heating raises superconducting switch temperature
When being changed to normal state, superconducting switch to the conduction heat of superconducting magnet is also also considerably reduced.
The superconducting switch of the present invention includes superconducting switch body and radiation shield cylinder.Superconducting switch body is positioned over radiation shield
Cover in the middle of cylinder and with radiation shield cylinder without directly contact.Superconducting switch body is fixed in radiation shield cylinder by a connecting rod
On bottom surface.Radiation shield cylinder be closed hollow circuit cylinder cylinder made by red copper material, the protruding one week skirt in radiation shield cylinder bottom surface
Side.Radiation shield cylinder is closely attached in superconducting magnet by the fixing hole on shirt rim, radiation shield cylinder is cooled to and superconduction
The almost identical temperature of magnet.
Described connecting rod is made up of stainless steel material.One end of connecting rod is welded on radiation shield cylinder inner bottom surface, separately
One end is threaded through a clamp nut and fixes with superconducting switch body with one section.By the sectional area and length that change connecting rod
Degree can adjust capacity of heat transmission between superconducting switch body and superconducting magnet.
The superconducting switch body of the present invention mainly by superconducting coil skeleton, superconducting coil, heater winding skeleton and adds
Hot wire coil is constituted.Superconducting coil skeleton and heater winding skeleton are all to make circle of the two ends with flange using red copper material
Cylinder, and the bottom surface closing of cylinder, the cylinder bottom center of closing is all provided with an aperture.The internal diameter of superconducting coil skeleton is more than and adds
The external diameter of hot wire coil skeleton.Superconducting coil skeleton is coaxially nested with the outside of heater winding skeleton, and superconducting coil skeleton
Closing bottom surface be close to the closing bottom surface of heater winding skeleton.The threaded end of the connecting rod penetrates from bottom to top two
Skeleton close bottom surface central small hole, another side plus fastening nut screwing clamping, by superconducting coil skeleton, heater winding skeleton and
Connecting rod is connected.Superconducting coil is wound on superconducting coil skeleton and good with thermally contacting between superconducting coil skeleton.Plus
Hot wire coil is wound on heater winding skeleton and good with thermally contacting between heater winding skeleton.
When being powered to the heater winding, heater winding produces heat and makes in the temperature of whole superconducting switch body
Rise；When the temperature of superconducting switch body is higher than critical temperature Tc, TcFor the superconduction critical temperature of superconducting coil, i.e. superconducting coil by
Superconducting state to normal state change when temperature, superconducting switch body is converted to normal state by superconducting state.Now, due to connecting superconduction
The connecting rod capacity of heat transmission of Switch main body and superconducting magnet is very weak so that superconducting switch body to the conduction heat of superconducting magnet becomes
Very little.When heater strip stops being powered, because radiation shield cylinder masks all extraneous radiant heat to superconducting switch body, surpass
The thermic load for leading Switch main body is almost nil, still can be fully cold by superconducting switch body by the very weak connecting rod of the capacity of heat transmission
But, realize that superconducting switch body is converted to superconducting state by normal state.
Description of the drawings
Fig. 1 is the superconducting switch structural representation with radiation shield cylinder of the embodiment of the present invention, in figure：1 superconducting switch
Body, 2 radiation shield cylinders, 3 superconducting coil skeletons, 4 superconducting coils, 5 heater winding skeletons, 6 heater windings, 7 connecting rods,
8 clamp nuts, 9 fixing holes.
Specific embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
As shown in figure 1, the superconducting switch of the present invention includes superconducting switch body 1 and radiation shield cylinder 2.Superconducting switch body
1 is positioned in the middle of radiation shield cylinder 2 and with radiation shield cylinder 2 without directly contact.Superconducting switch body 1 passes through a connecting rod 7
It is fixed on the inner bottom surface of radiation shield cylinder 2.Radiation shield cylinder 2 is closed hollow circuit cylinder cylinder, radiation shield made by red copper material
The protruding one week shirt rim in 2 bottom surfaces of cylinder.Radiation shield cylinder 2 is closely attached in superconducting magnet by the fixing hole 9 on shirt rim, is made
Radiation shield cylinder 2 is cooled to the temperature almost identical with superconducting magnet.
Described connecting rod 7 is made up of stainless steel material.One end of connecting rod 7 is welded on the inner bottom surface of radiation shield cylinder 2,
The other end is threaded through a clamp nut 8 and fixes with superconducting switch body 1 with one section.By the section for changing connecting rod 7
Product and length can adjust capacity of heat transmission between superconducting switch body 1 and superconducting magnet.
The superconducting switch body 1 of the present invention it is main by superconducting coil skeleton 3, superconducting coil 4, heater winding skeleton 5 with
And heater winding 6 is constituted.Superconducting coil skeleton 3 and heater winding skeleton 5 are all to make two ends using red copper material to carry
The cylinder of flange, and the bottom surface closing of cylinder, closing bottom center is all provided with an aperture.The internal diameter of superconducting coil skeleton 3 is big
In the external diameter of heater winding skeleton 5.Superconducting coil skeleton 3 is coaxially nested with the outside of heater winding skeleton 5, and superconducting line
It is close to the closing bottom surface of heater winding skeleton 5 the closing bottom surface of ring framework 3.The threaded end of the connecting rod 7 from it is lower to
On penetrate the central small hole of both closing bottom surfaces of superconducting coil skeleton 3 and heater winding skeleton 5, in another side plus clamp nut
8 tighten, and superconducting coil skeleton 3, heater winding skeleton 5 and connecting rod 7 are connected.Superconducting coil 4 is wound on superconducting line
It is on ring framework 3 and good with thermally contacting between superconducting coil skeleton 3.Heater winding 6 is wound on heater winding skeleton 5 simultaneously
It is good with thermally contacting between heater winding skeleton 5.
Claims (2)
1. a kind of superconducting switch with radiation shield cylinder, it is characterised in that described superconducting switch includes superconducting switch body
And radiation shield cylinder (2) (1)；Superconducting switch body (1) be positioned in the middle of radiation shield cylinder (2) and with radiation shield cylinder (2) nothing
Directly contact；Superconducting switch body (1) is fixed on radiation shield cylinder (2) inner bottom surface by a connecting rod (7)；Radiation shield
Cylinder (2) is closed hollow circuit cylinder cylinder, the protruding one week shirt rim in radiation shield cylinder (2) bottom surface；Radiation shield cylinder (2) is by shirt rim
On fixing hole (9) be closely attached in superconducting magnet, make radiation shield cylinder (2) be cooled to the temperature almost identical with superconducting magnet
Degree；Described connecting rod (7) one end is welded on radiation shield cylinder (2) inner bottom surface, and the other end is threaded through one with one section
Clamp nut (8) is fixed with superconducting switch body (1)；Superconduction is can adjust by changing the sectional area and length of connecting rod (7)
Switch main body (1) capacity of heat transmission and superconducting magnet between；
Described superconducting switch body (1) is main by superconducting coil skeleton (3), superconducting coil (4), heater winding skeleton (5)
And heater winding (6) composition；Superconducting coil skeleton (3) and heater winding skeleton (5) are all circle of the two ends with flange
Cylinder, and the bottom surface closing of cylinder, the cylinder bottom center of closing is all provided with an aperture；The internal diameter of superconducting coil skeleton (3) is big
In the external diameter of heater winding skeleton (5)；Superconducting coil skeleton (3) is coaxially nested with heater winding skeleton (5) outside, and
It is close to the closing bottom surface of heater winding skeleton (5) the closing bottom surface of superconducting coil skeleton (3)；The band of the connecting rod (7)
The end of thread penetrates from bottom to top the central small hole that both superconducting coil skeleton (3) and heater winding skeleton (5) close bottom surface,
Another side adds clamp nut (8) to tighten, and the connection of superconducting coil skeleton (3), heater winding skeleton (5) and connecting rod (7) is solid
It is fixed；Superconducting coil (4) is wound on superconducting coil skeleton (3) and good with thermally contacting between superconducting coil skeleton (3)；Heater strip
Coil (6) is wound on heater winding skeleton (5) and good with thermally contacting between heater winding skeleton (5).
2. according to the superconducting switch described in claim 1, it is characterised in that described radiation shield cylinder (2), superconducting coil skeleton
(3) and heater winding skeleton (5) is all made using red copper material, connecting rod (7) is made using stainless steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310586086.6A CN103647541B (en) | 2013-11-19 | 2013-11-19 | Superconducting switch with radiation shielding cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310586086.6A CN103647541B (en) | 2013-11-19 | 2013-11-19 | Superconducting switch with radiation shielding cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN103647541A CN103647541A (en) | 2014-03-19 |
| CN103647541B true CN103647541B (en) | 2017-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310586086.6A Active CN103647541B (en) | 2013-11-19 | 2013-11-19 | Superconducting switch with radiation shielding cylinder |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104579280A (en) * | 2014-11-18 | 2015-04-29 | 中国科学院电工研究所 | Superconductive switch for conducting cooling superconductive magnet |
| RU2602767C1 (en) * | 2015-08-04 | 2016-11-20 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Томский политехнический университет" | Superconducting fast switch |
| CN106449002B (en) * | 2016-09-09 | 2017-12-12 | 江苏美时医疗技术有限公司 | One kind is used for whole body nuclear magnetic resonance imaging super high field superconducting magnet |
| CN110071713B (en) * | 2019-03-01 | 2020-12-18 | 天津大学 | Superconducting switch for conduction cooling and superconducting magnet device thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170025A (en) * | 2007-12-05 | 2008-04-30 | 中国科学院电工研究所 | Mechanical superconductive switch |
| 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 |
| CN101714864B (en) * | 2009-10-30 | 2011-11-09 | 中国科学院电工研究所 | Superconducting switch with temperature closed-loop control |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006352150A (en) * | 1998-10-07 | 2006-12-28 | Toshiba Corp | Superconducting magnet |
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2013
- 2013-11-19 CN CN201310586086.6A patent/CN103647541B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170025A (en) * | 2007-12-05 | 2008-04-30 | 中国科学院电工研究所 | Mechanical superconductive switch |
| CN101714864B (en) * | 2009-10-30 | 2011-11-09 | 中国科学院电工研究所 | Superconducting switch with temperature closed-loop control |
| 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 |
Non-Patent Citations (1)
| Title |
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| 超导开关在超导磁体***中的应用;林玉宝;《电工电能新技术》;19831231;第33-40页 * |
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| CN103647541A (en) | 2014-03-19 |
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