CN103647541A - Superconducting switch with radiation shielding cylinder - Google Patents
Superconducting switch with radiation shielding cylinder Download PDFInfo
- Publication number
- CN103647541A CN103647541A CN201310586086.6A CN201310586086A CN103647541A CN 103647541 A CN103647541 A CN 103647541A CN 201310586086 A CN201310586086 A CN 201310586086A CN 103647541 A CN103647541 A CN 103647541A
- Authority
- CN
- China
- Prior art keywords
- superconducting
- skeleton
- radiation shield
- heater winding
- cylinder
- 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.)
- Granted
Links
Landscapes
- Containers, Films, And Cooling For Superconductive Devices (AREA)
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, particularly a kind of superconducting switch for conduction cooling superconducting magnet continuous current work pattern.
Background technology
Conduction cooling superconducting magnet unique advantage makes its application more and more extensive, has gradually and replaces the gesture that liquid helium soaks superconducting magnet.Different from traditional liquid helium immersion superconducting magnet system, conduction cooling superconducting magnet does not come cooling with liquid helium, but uses two stage cooler to superconducting magnet, to carry out cooling as low-temperature receiver.After conduction cooling superconducting magnet charging, generally need to form closed loop with superconducting switch and superconducting coil and carry out the operation of persistent current form, can make like this superconducting magnet obtain the magnetic field of superregulated degree, can also reduce the impact of outside noise on superconducting magnet system, improve magnet reliability of operation.Visible in conduction cooling superconducting magnet application, superconducting switch is important parts.
Superconducting switch is generally to utilize the conversion of the superconducting state-normal state of superconductor to make superconducting switch forward resistance state to from without hindrance state, reaches and makes circuit by the object that is conducting to disconnection; Should utilize in contrast the conversion of the normal state-superconducting state of superconductor to realize the conducting of circuit.The conversion of superconducting switch superconducting state-normal state and normal state-superconducting state, the general temperature or the background magnetic field that change superconductor of adopting realized the conversion between superconducting state and normal state, and two kinds of superconducting switchs of answering are in contrast referred to as temperature control superconducting switch and magnetic control superconducting switch.Wherein, temperature control superconducting switch structure is relatively simple, the most extensive in practical application.
In conduction cooling superconducting magnet system, superconducting magnet and superconducting switch all will be undertaken by refrigeration machine cooling, and the refrigerating capacity of refrigeration machine at a certain temperature is a determined value.Therefore there is contradictory factor with the hot link between superconducting magnet in superconducting switch: on the one hand, good hot link is to guarantee that superconducting switch can the fully cooling superconducting state of realizing; But then, when superconducting switch works in normal state, between superconducting switch and superconducting magnet, need good heat insulationly to guarantee that superconducting switch is as far as possible little to the heat by conduction of superconducting magnet, can not cause the quench of superconducting magnet.
Summary of the invention
The present invention, in order to solve the contradictory factor that between above-mentioned conduction cooling superconducting magnet and superconducting switch, hot link exists, proposes a kind of superconducting switch with radiation shield cylinder.
The radiant heat that in conduction cooling superconducting magnet system, the heat load of superconducting switch mainly comes from the outside.If superconducting switch is positioned in a shielding cylinder with superconducting magnet isothermal and just can masks all radiant heat that flow to superconducting switch, adopt so weak hot link just superconducting switch can be cooled down.When heater strip heating rising superconducting switch temperature makes it be converted to normal state, superconducting switch also just greatly reduces to the heat by conduction of superconducting magnet like this.
Superconducting switch of the present invention comprises superconducting switch body and radiation shield cylinder.Superconducting switch body is positioned in the middle of radiation shield cylinder and with radiation shield cylinder without directly contacting.Superconducting switch body is fixed on radiation shield cylinder inner bottom surface by a connecting rod.Radiation shield cylinder is the airtight hollow circuit cylinder cylinder that red copper material is made, protruding one week shirt rim, radiation shield cylinder bottom surface.Radiation shield cylinder is closely connected in superconducting magnet by the fixing hole on shirt rim, makes radiation shield cylinder be cooled to the temperature almost identical with superconducting magnet.
Described connecting rod is that stainless steel material is made.One end of connecting rod is welded on radiation shield cylinder inner bottom surface, and the other end is fixed with superconducting switch body by a clamp nut with one section of screw thread.By changing sectional area and the length of connecting rod, it is capacity of heat transmission between capable of regulating superconducting switch body and superconducting magnet.
Superconducting switch body of the present invention is mainly comprised of superconducting coil skeleton, superconducting coil, heater winding skeleton and heater winding.Superconducting coil skeleton and heater winding skeleton are all to adopt red copper material to make two ends with the cylinder of flange, and the sealing of the bottom surface of cylinder, and the cylinder bottom center of sealing all has an aperture.The internal diameter of superconducting coil skeleton is greater than the external diameter of heater winding skeleton.Superconducting coil skeleton is coaxially nested with in heater winding skeleton outside, and the sealing bottom surface of superconducting coil skeleton and the sealing bottom surface of heater winding skeleton are close to.The threaded end of described connecting rod penetrates the central small hole of two skeleton sealing bottom surfaces from bottom to top, at another side, adds fastening nut screwing clamping, and superconducting coil skeleton, heater winding skeleton and connecting rod are connected and fixed.Superconducting coil is wound on superconducting coil skeleton and is good with thermo-contact between superconducting coil skeleton.Heater winding is wound on heater winding skeleton and is good with thermo-contact between heater winding skeleton.
When giving described heater winding energising, heater winding produces heat rises the temperature of whole superconducting switch body; When the temperature of superconducting switch body is higher than critical temperature T
c, T
cfor the superconduction critical temperature of superconducting coil, temperature when superconducting coil is changed to normal state by superconducting state, superconducting switch body is converted to normal state by superconducting state.Now, because the connecting rod capacity of heat transmission of connection superconducting switch body and superconducting magnet is very weak, make superconducting switch body become very little to the heat by conduction of superconducting magnet.When heater strip stops switching on, because radiation shield cylinder masks all external worlds to the radiant heat of superconducting switch body, the heat load of superconducting switch body is almost nil, still can superconducting switch body is fully cooling by the very weak connecting rod of the capacity of heat transmission, realize superconducting switch body and be converted to superconducting state by normal state.
Accompanying drawing explanation
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.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention.
As shown in Figure 1, superconducting switch of the present invention comprises 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 contacting.Superconducting switch body 1 is fixed on radiation shield cylinder 2 inner bottom surfaces by a connecting rod 7.The airtight hollow circuit cylinder cylinder that radiation shield cylinder 2 is made for red copper material, protruding one week shirt rim, radiation shield cylinder 2 bottom surfaces.Radiation shield cylinder 2 is closely connected in superconducting magnet by the fixing hole 9 on shirt rim, makes radiation shield cylinder 2 be cooled to the temperature almost identical with superconducting magnet.
Described connecting rod 7 is made for stainless steel material.One end of connecting rod 7 is welded on radiation shield cylinder 2 inner bottom surfaces, and the other end is fixing with superconducting switch body 1 by a clamp nut 8 with one section of screw thread.By changing sectional area and the length of connecting rod 7, it is capacity of heat transmission between capable of regulating superconducting switch body 1 and superconducting magnet.
Superconducting switch body 1 of the present invention is mainly comprised of superconducting coil skeleton 3, superconducting coil 4, heater winding skeleton 5 and heater winding 6.Superconducting coil skeleton 3 and heater winding skeleton 5 are all to adopt red copper material to make two ends with the cylinder of flange, and the sealing of the bottom surface of cylinder, and sealing bottom center all has an aperture.The internal diameter of superconducting coil skeleton 3 is greater than the external diameter of heater winding skeleton 5.Superconducting coil skeleton 3 is coaxially nested with in heater winding skeleton 5 outsides, and the sealing bottom surface of superconducting coil skeleton 3 and the sealing bottom surface of heater winding skeleton 5 are close to.The threaded end of described connecting rod 7 penetrates superconducting coil skeleton 3 and heater winding skeleton 5 from bottom to top, and both seal the central small hole of bottom surface, at another side, add clamp nut 8 and tighten, superconducting coil skeleton 3, heater winding skeleton 5 and connecting rod 7 are connected and fixed.Superconducting coil 4 is wound on superconducting coil skeleton 3 and is good with thermo-contact between superconducting coil skeleton 3.Heater winding 6 is wound on heater winding skeleton 5 and is good with thermo-contact between heater winding skeleton 5.
Claims (3)
1. with a superconducting switch for radiation shield cylinder, it is characterized in that, described superconducting switch comprises 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 contacting; Superconducting switch body (1) is fixed on radiation shield cylinder (2) inner bottom surface by a connecting rod (7); Radiation shield cylinder (2) is airtight hollow circuit cylinder cylinder, protruding one week shirt rim, radiation shield cylinder (2) bottom surface; Radiation shield cylinder (2) is closely connected in superconducting magnet by the fixing hole on shirt rim (9), makes radiation shield cylinder (2) be cooled to the temperature almost identical with superconducting magnet; Described connecting rod (7) one end is welded on radiation shield cylinder (2) inner bottom surface, and the other end is fixing with superconducting switch body (1) by a clamp nut (8) with one section of screw thread; By changing sectional area and the length of connecting rod (7), it is capacity of heat transmission between capable of regulating superconducting switch body (1) and superconducting magnet.
2. according to superconducting switch claimed in claim 1, it is characterized in that, described superconducting switch body (1) is mainly comprised of superconducting coil skeleton (3), superconducting coil (4), heater winding skeleton (5) and heater winding (6); Superconducting coil skeleton (3) and heater winding skeleton (5) be all two ends with the cylinder of flange, and the bottom surface of cylinder sealing, the cylinder bottom center of sealing all has an aperture; The internal diameter of superconducting coil skeleton (3) is greater than the external diameter of heater winding skeleton (5); Superconducting coil skeleton (3) is coaxially nested with in heater winding skeleton (5) outside, and the sealing bottom surface of the sealing bottom surface of superconducting coil skeleton (3) and heater winding skeleton (5) is close to; The threaded end of described connecting rod (7) penetrates superconducting coil skeleton (3) and heater winding skeleton (5) from bottom to top, and both seal the central small hole of bottom surface, at another side, add clamp nut (8) and tighten, superconducting coil skeleton (3), heater winding skeleton (5) and connecting rod (7) are connected and fixed; It is upper and good with thermo-contact between superconducting coil skeleton (3) that superconducting coil (4) is wound on superconducting coil skeleton (3); It is upper and good with thermo-contact between heater winding skeleton (5) that heater winding (6) is wound on heater winding skeleton (5).
3. according to the superconducting switch described in claim 1 or 2, it is characterized in that, described radiation shield cylinder (2), superconducting coil skeleton (3) and heater winding skeleton (5) all adopt red copper material to make, and connecting rod (7) adopts stainless steel material to make.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103647541A true CN103647541A (en) | 2014-03-19 |
| CN103647541B CN103647541B (en) | 2017-05-17 |
Family
ID=50252715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310586086.6A Active CN103647541B (en) | 2013-11-19 | 2013-11-19 | Superconducting switch with radiation shielding cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103647541B (en) |
Cited By (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 |
| CN106449002A (en) * | 2016-09-09 | 2017-02-22 | 江苏美时医疗技术有限公司 | Ultra-high-field superconducting magnet for magnetic resonance imaging of whole body |
| CN110071713A (en) * | 2019-03-01 | 2019-07-30 | 天津大学 | For conducting cooling superconducting switch and its superconducting magnet apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006352150A (en) * | 1998-10-07 | 2006-12-28 | Toshiba Corp | Superconducting magnet |
| 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 |
-
2013
- 2013-11-19 CN CN201310586086.6A patent/CN103647541B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006352150A (en) * | 1998-10-07 | 2006-12-28 | Toshiba Corp | Superconducting magnet |
| 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 |
|---|
| 林玉宝: "超导开关在超导磁体***中的应用", 《电工电能新技术》 * |
Cited By (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 |
| CN106449002A (en) * | 2016-09-09 | 2017-02-22 | 江苏美时医疗技术有限公司 | Ultra-high-field superconducting magnet for magnetic resonance imaging of whole body |
| CN110071713A (en) * | 2019-03-01 | 2019-07-30 | 天津大学 | For conducting cooling superconducting switch and its superconducting magnet apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103647541B (en) | 2017-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105655084B (en) | A kind of superconducting magnet | |
| CN103647541A (en) | Superconducting switch with radiation shielding cylinder | |
| WO2020063383A1 (en) | Helium-cooled high-temperature superconducting assembly for high-current high-temperature superconducting current lead | |
| CN102903473A (en) | Superconducting magnet system | |
| CN102867610B (en) | Binary pluggable vapor cooled current lead device | |
| WO2013113224A1 (en) | Free liquid helium volatilization superconductive magnetic suspension device | |
| CN102360694B (en) | First-stage pullable binary coaxial current lead structure | |
| CN207068576U (en) | A kind of current feed of conduction cooling high temperature superconducting magnet | |
| CN103065759B (en) | Superconducting magnet supporting and positioning system | |
| CN103839649A (en) | Binary current lead structure in conduction cooling mode | |
| CN1956118B (en) | Suporconduction switch controlled by thermomagnet | |
| CN101714864B (en) | Superconducting switch with temperature closed-loop control | |
| JP5047873B2 (en) | Cryogenic equipment | |
| US7235975B2 (en) | Magnet system with shielded regenerator housing | |
| CN107978414B (en) | Helium gas channel structure for connecting liquid helium temperature zone and normal temperature zone | |
| CN206849605U (en) | A kind of extension type magnetizes current lead device | |
| CN205428618U (en) | Superconductive magnet | |
| CN102760547B (en) | Pull rod device of conduction cooling superconducting magnet coil | |
| CN217405325U (en) | Thermal control type superconducting switch for high-temperature superconducting magnet | |
| CN103151137B (en) | For the separable high-temperature superconductive lead wire of magnetic resonance image-forming superconducting magnet | |
| CN203799777U (en) | Binary current lead structure in conduction cooling mode | |
| CN109660235A (en) | A kind of thermally controlled persistent current switch circuit for high-temperature superconductor electromagnet | |
| CN202871444U (en) | Separable high temperature supercurrent lead for MRI (magnetic resonance imaging) superconducting magnet | |
| CN104579280A (en) | Superconductive switch for conducting cooling superconductive magnet | |
| CN104078188B (en) | superconducting magnet system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |