CN202871444U - Separable high temperature supercurrent lead for MRI (magnetic resonance imaging) superconducting magnet - Google Patents
Separable high temperature supercurrent lead for MRI (magnetic resonance imaging) superconducting magnet Download PDFInfo
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- CN202871444U CN202871444U CN 201220078285 CN201220078285U CN202871444U CN 202871444 U CN202871444 U CN 202871444U CN 201220078285 CN201220078285 CN 201220078285 CN 201220078285 U CN201220078285 U CN 201220078285U CN 202871444 U CN202871444 U CN 202871444U
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Abstract
The utility model relates to a feeding and cooling technology for a medical MRI (magnetic resonance imaging) superconducting magnet system, in particular to a separable high temperature supercurrent lead for an MRI superconducting magnet. The utility model discloses the separable high temperature supercurrent lead for the MRI superconducting magnet, which comprises a separable normal conduction section arranged on a thermostat upper cover. The separable normal conduction section is provided with an insulating sealing device; one end of the separable normal conduction section is inserted into a thermostat; a transition section copper part is arranged in the thermostat; the lower part of the transition section copper part is inserted with a superconduction section, wherein the transition section copper part is inserted with a copper ring; an insulating layer is arranged between the copper ring and the transition section copper part; the copper ring is fastened on the transition section copper part by a nut; both ends of the transition section copper part are respectively provided with a first inserted hole and a second inserted hole; the end part of the separable normal conduction section inserted into the thermostat is in clearance fit and is inserted with the first inserted hole; and the superconduction section is inserted in the second inserted hole.
Description
Technical field
The utility model relates to feed and the cooling technology of medical nuclear magnetic resonance imaging superconducting magnet system, refers in particular to a kind of separable high-temperature superconductive lead wire for magnetic resonance image-forming superconducting magnet.
Background technology
Superconducting magnetic resonance imaging machine is the equipment that checks of the very common human medical of big-and-middle-sized hospital at home and abroad, and it can provide clearly image of human body soft tissue section, and is very effective for the pathology of internal organs and brain in the diagnosis body.The excitation overwhelming majority of existing this superconducting magnet is that disposable excitation is finished behind magnet thermostat can liquid helium, and then the closure by means of superconducting switch is moved magnet under continuous current, but open magnet power supply after this.Because the current feed of connection power supply and magnet is the maximum heating load of introducing the liquid helium warm area, for effectively reducing the liquid helium evaporation, the common employing of prior art can be pulled out the formula current feed.This class current feed is called the conventional current lead-in wire by copper or copper alloy made.
High temperature superconducting materia has unimpededly loaded current at liquid nitrogen or lower temperature, and only conducts a small amount of heat, is very outstanding current feed material therefore, can save significantly refrigerating capacity.20 th century later high-temperature superconductive lead wires begin to be used in a large number the small-sized superconducting magnet of laboratory scale, so that the evaporation of cooling superconducting magnets liquid helium zero or conduction cooling become possibility.So-called high-temperature superconductive lead wire is comprised of with the often section of leading that is connected room temperature the high-temperature superconducting segment that is in low temperature, so be also referred to as binary current lead, is main refrigeration power consumption to the often cooling of the section of leading.For large electric current gas cooled current lead, this power consumption is 1/3 of conventional current lead-in wire.
To sum up said, existing technical background is: be used for the pulled out formula current feed of sustainable electric current operation magnet or save cold high-temperature superconductive lead wire (can not pull out formula but do not make).
For zero evaporation current lead-in wire, conventional section can only rely on the conduction cooling, and the one-level cold head by mini refrigerating machine provides usually.And this refrigerating capacity is very limited, and is greatly long-pending when the cold panel of medical magnetic resonance magnet especially, also has in the larger support heat by conduction situation, and the heat load that reduces significantly the 50K warm area seems very meaningful.The separable high-temperature superconductive lead wire of the conventional section of the utility model can reduce greatly to 50K heat load.
The utility model content
The technical problem that one, will solve
The purpose of this utility model is for the existing the problems referred to above of prior art, the spy provides a kind of separable high-temperature superconductive lead wire for magnetic resonance image-forming superconducting magnet, formed by fixing high-temperature superconducting segment and separable conventional conductive segment, be used for the excitation of medical magnetic resonance imaging superconducting magnet.It is characterized in that: two sections current feeds connect when superconducting magnet needs excitation or changes electric current, and linkage section is lower than the 70K temperature with the one-level cold head cooling of mini refrigerating machine; Because zero resistance and the lower thermal conductivity of high-temperature superconducting segment make the liquid helium loss very low.
Two, the technical scheme for solving the problems of the technologies described above
For solving the problems of the technologies described above, a kind of separable high-temperature superconductive lead wire for magnetic resonance image-forming superconducting magnet of the utility model, comprise the separable often section of leading that is arranged on the thermostat loam cake, the above-mentioned separable often section of leading is provided with insulation seal device, the above-mentioned separable Duan Yiduan that often leads inserts in the thermostat, one changeover portion copper spare is set in the above-mentioned thermostat, this changeover portion copper spare bottom is plugged with superconducting section, wherein, grafting one copper ring on the above-mentioned changeover portion copper spare, be provided with insulating barrier between above-mentioned copper ring and the changeover portion copper spare, above-mentioned copper ring by fastening nuts on changeover portion copper spare, the two ends of above-mentioned changeover portion copper spare are respectively equipped with jack one and jack two, and the end of the separable often section of leading in the above-mentioned insertion thermostat and jack one matched in clearance are pegged graft, and above-mentioned superconducting section is plugged in the jack two.
As optimization, above-mentioned insulation seal device is comprised of epoxy bushing and sealing ring, above-mentioned epoxy bushing cooperates with the separable often section of leading to peg graft and be connected to and covers, above-mentioned separable often the lead section outer wall corresponding with epoxy bushing has annular groove, be provided with sealing ring in the annular groove, above-mentioned sealing ring and epoxy bushing are sealed and matched
As optimization, above-mentioned insulating barrier includes insulating sleeve and aluminium nitride lamination, and above-mentioned insulating sleeve is plugged in the copper ring inner ring and pegs graft with changeover portion copper spare, and above-mentioned aluminium nitride lamination is separately positioned on upper surface and the lower surface of copper ring.
As optimization, be provided with plain washer between above-mentioned copper ring and the nut, this plain washer cooperates grafting with changeover portion copper spare, and above-mentioned plain washer is arranged on aluminium nitride lamination top.
As optimization, above-mentioned superconducting section is formed by hts band and stainless steel stent soldering.
Three, the beneficial effects of the utility model
High temperature superconducting materia has the double grading of zero resistance and lower thermal conductivity, is suitable for very much the current feed of superconducting magnet, but at present its critical temperature at 100K (absolute temperature) up and down.Therefore, current feed is comprised of the high-temperature superconducting segment of low-temperature space and the conventional conductive segment in higher temperatures district usually, is also referred to as binary current lead.At present, the small-sized superconducting magnet of great many of experiments chamber scale all adopts this binary current lead, its changeover portion adopts the one-level cold head cooling of mini refrigerating machine, can realize the superconducting magnet system of liquid helium zero evaporation or conduction cooling, need not binary current lead is made separable form.
Separable high-temperature superconductive lead wire collection can pull out the advantage of current feed and high-temperature superconductive lead wire, and its main purpose is to reduce the heat load to mini refrigerating machine one-level cold head.For liquid helium zero evaporation magnet, current feed can only adopt the conduction cooling, and according to Optimization Theory, every kA electric current is to the heat load～45W of 50K (one-level cold head nominal temperature), when the magnet excitation electric current was 400A, the 50K heat load of a pair of high-temperature superconductive lead wire was 36W; When zero current, the heat by conduction of lead-in wire is in 18～20W level.And the refrigerating capacity of a 1.5W4.2K GM mini refrigerating machine one-level cold head only has 35W, and as seen this heat load accounts for 50% of one-level cold head refrigerating capacity, can greatly alleviate the heat load of one-level cold head after often the section of leading is separated.
Description of drawings
Below in conjunction with accompanying drawing the separable high-temperature superconductive lead wire that the utility model is used for magnetic resonance image-forming superconducting magnet is described further:
Fig. 1 is the structural representation that the utility model is used for the separable high-temperature superconductive lead wire of magnetic resonance image-forming superconducting magnet.
Among the figure, 1 is loam cake, and 2 are the separable often section of leading, and 3 is changeover portion copper spare, and 4 is copper ring, 5 is nut, and 6 is that jack one, 7 is that jack two, 8 is epoxy bushing, and 9 is sealing ring, 10 is insulating sleeve, and 11 is the aluminium nitride lamination, and 12 is plain washer, and 13 is hts band, and 14 is stainless steel stent.
Embodiment
Execution mode one: as shown in Figure 1, the utility model is used for the separable high-temperature superconductive lead wire of magnetic resonance image-forming superconducting magnet, comprise the separable often section of leading 2 that is arranged on thermostat loam cake 1, the above-mentioned separable often section of leading 2 is provided with insulation seal device, the above-mentioned separable often section of leading 2 one ends insert in the thermostat, one changeover portion copper spare 3 is set in the above-mentioned thermostat, these changeover portion copper spare 3 bottoms are plugged with superconducting section, wherein, grafting one copper ring 4 on the above-mentioned changeover portion copper spare 3, be provided with insulating barrier between above-mentioned copper ring 4 and the changeover portion copper spare 3, above-mentioned copper ring 4 is fastened on the changeover portion copper spare 3 by nut 5, the two ends of above-mentioned changeover portion copper spare 3 are respectively equipped with jack 1 and jack 27, and the end of the separable often section of leading 2 in the above-mentioned insertion thermostat and jack one 6 matched in clearance are pegged graft, and above-mentioned superconducting section is plugged in the jack 27.
Above-mentioned insulation seal device is comprised of epoxy bushing 8 and sealing ring 9, above-mentioned epoxy bushing 8 cooperates grafting and is connected on the loam cake 1 with the separable often section of leading 2, above-mentioned and the epoxy bushing 8 corresponding separable often section of leading 2 outer walls have annular groove, be provided with sealing ring 9 in the annular groove, above-mentioned sealing ring 9 is sealed and matched with epoxy bushing 8.
Above-mentioned insulating barrier includes insulating sleeve 10 and aluminium nitride lamination 11, and above-mentioned insulating sleeve 10 is plugged in copper ring 4 inner rings and pegs graft with changeover portion copper spare 3, and above-mentioned aluminium nitride lamination 11 is separately positioned on upper surface and the lower surface of copper ring 4.
Be provided with plain washer 12 between above-mentioned copper ring 4 and the nut 5, this plain washer 12 cooperates grafting with changeover portion copper spare 3, and above-mentioned plain washer 12 is arranged on aluminium nitride lamination 11 tops.
Above-mentioned superconducting section is formed by hts band 13 and stainless steel stent soldering, and this hts band 13 can be made by second generation YBCO superconductive tape (without the copper stabilized zone) or Bi-2223/Ag-Au band, and its hts band 13 adopts low temperature brazing with stainless steel.The first order cold head hot link of above-mentioned copper ring 4 and mini refrigerating machine, guarantee that copper ring 4 can operate in below the 70K temperature, just from the Joule heat of the normal section of leading and conduction heat transfer to refrigeration machine, otherwise will certainly cause the increase of hts band 13 consumptions, raise the cost.
Insulating sleeve 10 and aluminium nitride lamination 11 are used for isolating copper ring 4 and changeover portion copper spare 3, and aluminium nitride belongs to the higher insulating material of thermal conductivity, and nut 5 and plain washer 12 are used for compressing the aluminium nitride pad, to guarantee that heat transfer is good between copper ring 4 and the transition copper spare.
The lower end of hts band 13 is by low-temperature superconducting line conduction cooling, and this temperature must guarantee that the low-temperature superconducting line is in superconducting state.When magnet excitation reaches the electric current that needs, superconducting switch is converted to conducting state, and after power supply for magnet coils was closed, the separable often section of leading 2 can disengage with changeover portion copper spare 3, but does not pull out away.The separable often section of leading 2 also cuts off for the heat by conduction of mini refrigerating machine first order cold head simultaneously.Sealing ring 9 is used for preventing the helium effusion.
The above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (5)
1. separable high-temperature superconductive lead wire that is used for magnetic resonance image-forming superconducting magnet, comprise the separable often section of leading that is arranged on the thermostat loam cake, the described separable often section of leading is provided with insulation seal device, the described separable Duan Yiduan that often leads inserts in the thermostat, one changeover portion copper spare is set in the described thermostat, this changeover portion copper spare bottom is plugged with superconducting section, it is characterized in that: the copper ring of pegging graft on the described changeover portion copper spare, be provided with insulating barrier between described copper ring and the changeover portion copper spare, described copper ring by fastening nuts on changeover portion copper spare, the two ends of described changeover portion copper spare are respectively equipped with jack one and jack two, the end of the separable often section of leading in the described insertion thermostat and jack one matched in clearance are pegged graft, and described superconducting section is plugged in the jack two.
2. the separable high-temperature superconductive lead wire for magnetic resonance image-forming superconducting magnet according to claim 1, it is characterized in that: described insulation seal device is comprised of epoxy bushing and sealing ring, described epoxy bushing cooperates with the separable often section of leading to peg graft and be connected to and covers, described separable often the lead section outer wall corresponding with epoxy bushing has annular groove, be provided with sealing ring in the annular groove, described sealing ring and epoxy bushing are sealed and matched.
3. the separable high-temperature superconductive lead wire for magnetic resonance image-forming superconducting magnet according to claim 1, it is characterized in that: described insulating barrier includes insulating sleeve and aluminium nitride lamination, described insulating sleeve is plugged in the copper ring inner ring and pegs graft with changeover portion copper spare, and described aluminium nitride lamination is separately positioned on upper surface and the lower surface of copper ring.
4. the separable high-temperature superconductive lead wire for magnetic resonance image-forming superconducting magnet according to claim 3, it is characterized in that: be provided with plain washer between described copper ring and the nut, this plain washer cooperates grafting with changeover portion copper spare, and described plain washer is arranged on aluminium nitride lamination top.
5. the separable high-temperature superconductive lead wire for magnetic resonance image-forming superconducting magnet according to claim 1, it is characterized in that: described superconducting section is formed by hts band and stainless steel stent soldering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220078285 CN202871444U (en) | 2012-03-05 | 2012-03-05 | Separable high temperature supercurrent lead for MRI (magnetic resonance imaging) superconducting magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220078285 CN202871444U (en) | 2012-03-05 | 2012-03-05 | Separable high temperature supercurrent lead for MRI (magnetic resonance imaging) superconducting magnet |
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| Publication Number | Publication Date |
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| CN202871444U true CN202871444U (en) | 2013-04-10 |
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| CN 201220078285 Expired - Lifetime CN202871444U (en) | 2012-03-05 | 2012-03-05 | Separable high temperature supercurrent lead for MRI (magnetic resonance imaging) superconducting magnet |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151137A (en) * | 2012-03-05 | 2013-06-12 | 宁波健信机械有限公司 | Superconducting current lead wire for magnetic resonance imaging superconducting magnet |
| CN103714937A (en) * | 2014-01-16 | 2014-04-09 | 奥泰医疗系统有限责任公司 | Current lead structure for superconducting magnet |
| CN107808733A (en) * | 2017-12-12 | 2018-03-16 | 合肥中科离子医学技术装备有限公司 | One kind is used for cryogenic system cooling plug-in woven hose |
-
2012
- 2012-03-05 CN CN 201220078285 patent/CN202871444U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151137A (en) * | 2012-03-05 | 2013-06-12 | 宁波健信机械有限公司 | Superconducting current lead wire for magnetic resonance imaging superconducting magnet |
| CN103714937A (en) * | 2014-01-16 | 2014-04-09 | 奥泰医疗系统有限责任公司 | Current lead structure for superconducting magnet |
| CN103714937B (en) * | 2014-01-16 | 2016-05-04 | 奥泰医疗系统有限责任公司 | Superconducting magnet current down-lead structure |
| CN107808733A (en) * | 2017-12-12 | 2018-03-16 | 合肥中科离子医学技术装备有限公司 | One kind is used for cryogenic system cooling plug-in woven hose |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zheng Jie Inventor after: Xu Jianyi Inventor after: Bi Yanfang Inventor after: He Qun Inventor before: Zheng Jie Inventor before: Xu Jianyi Inventor before: Hua Yanfang Inventor before: He Qun |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHENG JIE XU JIANYI HUA YANFANG HE QUN TO: ZHENG JIE XU JIANYI BI YANFANG HE QUN |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161205 Address after: 315301 Ningbo Province, Cixi city streets Han Han new industrial cluster district hi tech Avenue, No. 427 Patentee after: NINGBO JANSEN NMR TECHNOLOGY CO., LTD. Address before: Yuyao City Jia Ling Road 315000 Zhejiang city of Ningbo Province Patentee before: Ningbo Jansen Mechanism Corp. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |