CN204808988U - Superconducting magnet - Google Patents
Superconducting magnet Download PDFInfo
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- CN204808988U CN204808988U CN201520490896.6U CN201520490896U CN204808988U CN 204808988 U CN204808988 U CN 204808988U CN 201520490896 U CN201520490896 U CN 201520490896U CN 204808988 U CN204808988 U CN 204808988U
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Abstract
The utility model provides a superconducting magnet, including the jar body that is used for holding coolant, a superconducting coil who arranges the internal portion of jar in, the jar body is including outer wall, inner wall and a pair of head, outer wall, inner wall are the tubular structure, just outer wall, inner wall both ends are connected respectively to a pair of head, still include the inner tube that combines together with jar outer wall of the body or head, the inner tube at least the part dip coolant, it can be with the complete submergence of superconducting coil in coolant after coolant's the liquid level lifting to make. The utility model discloses a superconducting magnet's inner tube has occupied coolant's in jar body liquid level can be raised in jar internal partial space to the internal superconducting coil of coolant submergence jar that the use was tried one's best fewly, the coolant who sparingly costs an arm and a leg reduces the cost.
Description
[technical field]
The utility model relates to magnetic resonance imaging (MRI, MagneticResonanceImaging) technical field, particularly relates to a kind of superconducting magnet for magnetic resonance imaging system.
[background technology]
The superconducting magnet of magnetic resonance imaging system normally fills liquid helium submergence superconducting coil in the tank body of cryostat, makes superconducting coil keep low-temperature superconducting state, to produce cryogenic magnetic field.
As shown in Figure 1, described superconducting magnet comprises cryostat to the structure of the existing superconducting magnet for magnetic resonance system, and is positioned at the magnet coil of described cryostat.
The tank body 1 of cryostat comprises inwall 2, outer wall 3 and end socket 4; Described outer wall 3 is coaxially arranged with described inwall 2; Described end socket 4 is two groups, lays respectively at the axial two ends of described tank body 1; The outer ring of described end socket 4 is connected with described outer wall 3, and the inner ring of described end socket 4 is connected with described inwall 2.
Low-temperature cooling media can be accommodated, such as liquid helium in the tank body 1 that described inwall 2, outer wall 3 and end socket 4 surround jointly.
The magnet coil of described superconducting magnet comprises the superconducting coil 5 being positioned at described tank body 1, and described superconducting coil 5 is wound on the coil rack outside described inwall 2.When magnetic resonance system works, superconducting coil 5 needs to be immersed in liquid helium and keeps low-temperature superconducting state.
Described cryostat can also comprise at least one deck housing (not shown) be positioned at outside described tank body 1, described housing can be such as vacuum layer or thermal radiation shield, described housing is for reducing described tank body 1 and extraneous heat exchange, to reduce the evaporation of liquid helium in tank body 1, superconducting coil 5 is made to be in low-temperature condition.
The magnet coil of described superconducting magnet can also comprise exterior loop 6, and described exterior loop 6 can be shielded coil, and described exterior loop 6 is connected with superconducting coil 5 by reinforcement 7; Described exterior loop 6 is coaxially arranged with described superconducting coil 5, and is positioned at the outside of described superconducting coil 5; Described exterior loop 6 is two groups, respectively near the axial two ends of described tank body 1.Because the diameter of exterior loop 6 is larger than superconducting coil 5, therefore when magnetic resonance system works, described tank body 1 inside is except soaking the liquid helium of superconducting coil 5, and the liquid helium of quite a few occupies the cavity volume 8 between two groups of exterior loop 7 in addition.
And liquid helium is materials in short supply, price is very expensive, and the liquid helium when ensureing that magnetic resonance system uses in tank body 1 under the prerequisite of submergence superconducting coil 5, can should reduce the liquid helium consumption in tank body 1, to save cost as far as possible.
And on the other hand, superconducting magnet needs coolant as much as possible to keep low temperature in long-distance transport process, prevent superconducting coil 5 temperature in transportation from rising to over 70K and warm-up phenomenon occurs, because once there is warm-up phenomenon, just need to carry out precooling again to superconducting magnet.
Therefore, need to propose a kind of superconducting magnet can saving liquid helium.
[utility model content]
What the utility model solved is the problem how reducing liquid helium consumption in magnetic resonance superconducting magnet.
In order to solve the problem, the utility model proposes a kind of superconducting magnet, comprise outer wall, inwall and a pair end socket; Described outer wall and inwall are tubular structure and coaxially arranged, and described a pair end socket lays respectively at the axial two ends of described outer wall and inwall and be connected described outer wall and inwall; Also comprise inner core, described inner core has at least an end and described outer wall or end socket to combine; Described outer wall, inwall, a pair end socket and inner core surround one jointly for holding the tank body of liquid helium; Described inner core is positioned at below the liquid level of described liquid helium at least partly; Also comprise the superconducting coil being positioned at described tank body, described superconducting coil is by described liquid helium submergence.
Alternatively, the axis of described inner core and the axes normal of described outer wall.
Alternatively, two ends of described inner core and described outer wall combine.
Alternatively, the axis of described inner core and the axis being parallel of described outer wall.
Alternatively, two ends of described inner core combine with described a pair end socket respectively.
Alternatively, described inner core is straight cylinder shape.
Alternatively, it is characterized in that, Inner Constitution one cavity of described inner core is also isolated with described tank body.
Alternatively, the conduits be connected with described inner core inside and the valve being connected to conduits is also comprised.
Alternatively, described inner core inside is vacuum or coolant.
A kind of superconducting magnet, comprise for holding the tank body of coolant, being placed in the superconducting coil of tank interior, described tank body comprises outer wall, inwall and a pair end socket, and described outer wall, inwall are tubular structure, and described a pair end socket connects outer wall, inwall two ends respectively; Also comprise the inner core combined with the outer wall of tank body or end socket, what described inner core was at least part of is immersed in coolant, superconducting coil can be immersed in coolant completely after making the liquid level lifting of coolant.
Alternatively, two of described inner core relative distal opening by outer wall or end socket close.
Alternatively, described outer wall or end socket are provided with perforate, and described perforate is connected with inner core.
Alternatively, also comprise the conduit be communicated with inner core, described conduit is through perforate.
Alternatively, described outer wall or end socket establish perforate, described inner core runs through perforate, and the end of inner core welds with outer wall or end socket.
Alternatively, described coolant is liquid helium.
The utility model contrast prior art has following beneficial effect:
The inner core of superconducting magnet of the present utility model occupies a part of space in described tank body, can raise the liquid level of liquid helium in tank body, to use the superconducting coil in as far as possible few liquid helium submergence tank body, saves expensive liquid helium, reduces cost.
The inner core of superconducting magnet of the present utility model can also strengthen the local strength of described tank body.
Further, in alternatives of the present utility model, described inner core inside is a cavity isolated with described tank body, in the transportation of superconducting magnet, described inner core inside vacuumized or fills coolant, the heat exchange of liquid helium and extraneous air in tank body can be reduced, absorbing outside leakage heat, prevent the liquid helium in tank body from being evaporated in a large number in transportation, extend the haulage time of superconducting magnet.
[accompanying drawing explanation]
Fig. 1 is the structure chart of the existing superconducting magnet for magnetic resonance system;
Fig. 2 is the structure chart of the superconducting magnet of the utility model embodiment one;
Fig. 3 is the schematic diagram of the superconducting magnet manufacture method of the utility model embodiment one;
Fig. 4 is the structure chart of the superconducting magnet of the utility model embodiment two;
Fig. 5 is the structure chart of the superconducting magnet of the utility model embodiment three;
Fig. 6 is the structure chart of the superconducting magnet of the utility model embodiment four;
Fig. 7 is the structure chart of the superconducting magnet of the utility model embodiment four.
[embodiment]
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in detail embodiment of the present utility model below in conjunction with accompanying drawing.
embodiment one
Fig. 2 shows a kind of superconducting magnet of the utility model embodiment, and described superconducting magnet comprises cryostat, and is positioned at the magnet coil of described cryostat.
Described cryostat comprises tank body 1, and described tank body 1 comprises inwall 2, outer wall 3 and a pair end socket 4; Described outer wall 3 and described inwall 2 are cylindrical shape and coaxially arranged; Described end socket 4 is two groups, lays respectively at the axial two ends of described tank body 1; The outer ring of described end socket 4 is connected with described outer wall 3, and the inner ring of described end socket 4 is connected with described inwall 2.
Described tank body 1 also comprises inner core 10, and described inner core 10 has at least an end and described outer wall 3 or end socket 4 to combine.In the present embodiment, two ends and the outer wall 3 of described inner core 10 combine, and the axes normal of described inner core 10 is in the axis of described outer wall 3.
Low-temperature cooling media is accommodated, such as liquid helium in the tank body 1 that described inwall 2, outer wall 3, a pair end socket 4 and inner core 10 surround jointly.
The magnet coil of described superconducting magnet comprises the superconducting coil 5 being positioned at described tank body 1, and described superconducting coil 5 is wound on circle tube inner wall 2.
Described cryostat can be sandwich construction, also comprise at least one deck housing (not shown) be positioned at outside described tank body 1, described housing can be such as vacuum layer or thermal radiation shield, described housing, for reducing described tank body 1 and extraneous heat exchange, is in low-temperature superconducting state to make the superconducting coil 5 in tank body 1.
The magnet coil of described superconducting magnet also comprises exterior loop 6, and described exterior loop 6 can be shielded coil, and described exterior loop 6 is connected with described inwall 2 by reinforcement 7; Described exterior loop 6 is wound on described reinforcement 7, and is positioned at the outside of described superconducting coil 5; Described exterior loop 6 is two groups, respectively near the axial two ends of described tank body 1.
In the present embodiment, described inner core 10 is between two groups of exterior loop 6.
When magnetic resonance system works, described superconducting coil 5 needs to be immersed in keep low-temperature superconducting state in liquid helium, thus produces cryogenic magnetic field.
Occupy the segment space in tank body 1 due to described inner core 10, raised the height of the liquid level 11 of liquid helium in tank body 1, therefore with as far as possible few liquid helium submergence superconducting coil 5, liquid helium consumption can be reduced, reduce costs.
In different embodiment of the present utility model, the position of described inner core 10 can adjust according to actual conditions.But in order to liquid level 11 height raising liquid helium, with as far as possible few liquid helium submergence superconducting coil 5, described inner core 10 is positioned at the liquid level less than 11 of described liquid helium at least partly; What namely described inner core 10 was at least part of is immersed in coolant (liquid helium), superconducting coil 5 can be immersed in coolant (liquid helium) completely after making liquid level 11 lifting of coolant (liquid helium).
Described inner core 10 can be rectangular cylinder, circular cylinder or other special shape tubes.But consider from manufacturing process and stress condition, straight cylinder shape is comparatively easily processing and stress is best, therefore described inner core 10 is preferably straight cylinder shape.
Described inner core 10 can also play the effect of reinforcement, can improve the local strength of tank body 1.
The quantity of described inner core 10 can change according to the design of magnet coil or position.
Inner core 10 quantity of the present embodiment is 3, described 3 inner core 10 layouts parallel to each other.
For traditional 1.5T superconducting magnet, 3 inner cores 10 of the cryostat of the present embodiment can reduce liquid helium consumption in superconducting magnet and be about 200L, reduce costs about 20%.
The manufacture method of the superconducting magnet of the present embodiment is as follows:
As shown in Figure 3, on the outer wall 3 of tank body 1, processing runs through the perforate 12 of described outer wall 3 in advance, and described hole can be cut when outer wall 3 manufactures in pre-blanking, and processing technology is simple.
Complete magnet coil after the assembling of tank body 1 inside, described inner core 10 is inserted the perforate 12 running through described outer wall 3, two ends of inner core 10 coordinate with described perforate 12 respectively, and use is welded to connect described inner core 10 and described outer wall 3, form welding procedure groove.
After welding, the surface of outer wall 3 can not form obvious projection, can not affect the assembling of gap between cryostat sandwich construction and tank body 1.
embodiment two
On the basis of embodiment one, in order to extend the haulage time of superconducting magnet, described inner core 10 inside can also be vacuumized or fill into coolant.
As shown in Figure 4, by two endcappeds of described inner core 10, two relative distal opening of described inner core 10 by the outer wall 3 that combines with described inner core or end socket 4 close.Described inner core 10 forms a cavity mutually isolated with described tank body 1.
Described outer wall 3 or end socket 4 are provided with perforate 12, and described perforate 12 is connected with inner core 10.
Also comprise the conduit 13 be communicated with inner core 10, described conduit 13 is through described perforate 12.
Described inner core 10 is connected with the liquid injection port 15 of outside by conduit 13 and valve 14, and described conduit 13 for being vacuumized by described inner core 10, or fills into coolant to described inner core 10 inside.
After superconducting magnet completes assembling, first to fill liquid helium in tank body 1, and carry out precooling, be in superconducting temperature to make the superconducting coil 5 in superconducting magnet; And then the superconducting magnet after assembling and precooling being completed is transported to destination.
In transportation, the refrigeration machine of superconducting magnet is not opened, and the temperature in tank body 1 constantly raises due to the heat exchange with the external world.And the superconducting coil 5 in described tank body 1 is once temperature is more than 70K, warm-up phenomenon will be produced, just need to re-start precooling to superconducting magnet.Therefore, prevent superconducting coil 5 temperature in transportation in described tank body 1 from rising to over 70K.
When the transportation range of superconducting magnet is nearer, the liquid helium that described tank body 1 inside fills just can meet movement requirement, can transport by conduit 13, described inner core 10 is vacuumized after valve-off 14.
When the transportation range of superconducting magnet is far away, the liquid helium of tank body 1 inside cannot meet movement requirement, then can before shipping, fill into liquid helium by conduit 13 in described inner core 10, these liquid heliums can absorb the leakage heat externally to tank body 1, can extend the haulage time of about 20%.
When the transportation range of superconducting magnet is very far away, can fill into the large coolant (such as nitrogen) of specific heat ratio liquid helium in described inner core 10 by conduit 13, the coolant that these heat capacity ratio liquid heliums are large can absorb more leakages externally to tank body 1 heat, extends haulage time further.
In the present embodiment, the volume of described 3 inner cores 10 is 200L.According to calculating, the heat that the liquid helium of 200L absorbs when 4.2K is warming up to 70K is 652.5KJ; The heat that the nitrogen of 200L absorbs when 4.2K is warming up to 70K is 46420KJ.As can be seen here, in described inner core 10, fill coolant can absorb outside leakage heat, prevent the temperature in long transportation of the superconducting coil 5 in tank body 1 from raising.Further, the coolant (such as nitrogen) that thermal capacity is high is more suitable for the transport of long distance.
Inner core 10 inside of the present embodiment can fill different coolants flexibly according to the length of superconducting magnet haulage time and distance or vacuumize, and extends transportation range and the time of superconducting magnet.
embodiment three
In concrete enforcement of the present utility model, the quantity of the inner core 10 of described superconducting magnet and position can adjust according to the size of SUPERCONDUCTING MAGNET DESIGN or tank body 1.
As shown in Figure 5, two ends and the described outer wall 3 of the inner core 10 of the superconducting magnet of the present embodiment combine, and the axes normal of described inner core 10 is in the axis of described tank body 1; The quantity of described inner core 10 is 2, and described 2 inner cores 10 are distributed on the incline direction of both sides symmetrically.
embodiment four
In concrete enforcement of the present utility model, two ends of the inner core 10 of described superconducting magnet can combine respectively with the end socket 4 at described tank body 1 two ends, or an end and the described outer wall 3 of described inner core 10 combine, and another end and described end socket 4 combine.
As shown in Figure 6 and Figure 7, the axis being parallel of the inner core 10 of the superconducting magnet of the present embodiment is in the axis with described tank body 1, and two ends of described inner core 10 and the end socket 4 at described tank body 1 two ends combine respectively; The quantity of described inner core 10 is 5, and described inner core 10 is distributed between reinforcement 7.
In the utility model, each embodiment adopts laddering literary style, and emphasis describes the difference with previous embodiment, the same section of the same procedure in each embodiment or structure reference previous embodiment.
Although the utility model with preferred embodiment openly as above; but it is not for limiting the utility model; any those skilled in the art are not departing from spirit and scope of the present utility model; the Method and Technology content of above-mentioned announcement can be utilized to make possible variation and amendment to technical solutions of the utility model; therefore; every content not departing from technical solutions of the utility model; the any simple modification done above embodiment according to technical spirit of the present utility model, equivalent variations and modification, all belong to the protection range of technical solutions of the utility model.
Claims (15)
1. a superconducting magnet, comprises outer wall, inwall and a pair end socket;
Described outer wall and inwall are tubular structure and coaxially arranged, and described a pair end socket lays respectively at the axial two ends of described outer wall and inwall and be connected described outer wall and inwall;
It is characterized in that, also comprise inner core, described inner core has at least an end and described outer wall or end socket to combine;
Described outer wall, inwall, a pair end socket and inner core surround one jointly for holding the tank body of liquid helium;
Described inner core is positioned at below the liquid level of described liquid helium at least partly;
Also comprise the superconducting coil being positioned at described tank body, described superconducting coil is by described liquid helium submergence.
2. superconducting magnet as claimed in claim 1, is characterized in that, the axis of described inner core and the axes normal of described outer wall.
3. superconducting magnet as claimed in claim 2, it is characterized in that, two ends and the described outer wall of described inner core combine.
4. superconducting magnet as claimed in claim 1, is characterized in that, the axis of described inner core and the axis being parallel of described outer wall.
5. superconducting magnet as claimed in claim 4, it is characterized in that, two ends of described inner core combine with described a pair end socket respectively.
6. superconducting magnet as claimed in claim 1, it is characterized in that, described inner core is straight cylinder shape.
7. the superconducting magnet as described in any one of claim 1 to 6, is characterized in that, Inner Constitution one cavity of described inner core is also isolated with described tank body.
8. superconducting magnet as claimed in claim 7, is characterized in that, also comprises the conduit be connected with described inner core inside and the valve being connected to conduit.
9. superconducting magnet as claimed in claim 7, it is characterized in that, described inner core inside is vacuum or coolant.
10. a superconducting magnet, comprise for holding the tank body of coolant, being placed in the superconducting coil of tank interior, described tank body comprises outer wall, inwall and a pair end socket, and described outer wall, inwall are tubular structure, and described a pair end socket connects outer wall, inwall two ends respectively; It is characterized in that, also comprise the inner core combined with the outer wall of tank body or end socket, what described inner core was at least part of is immersed in coolant, superconducting coil can be immersed in coolant completely after making the liquid level lifting of coolant.
11. superconducting magnets as claimed in claim 10, is characterized in that, two relative distal opening of described inner core by outer wall or end socket close.
12. superconducting magnets as described in claim 10 or 11, it is characterized in that, described outer wall or end socket are provided with perforate, and described perforate is connected with inner core.
13. superconducting magnets as claimed in claim 9, is characterized in that, also comprise the conduit be communicated with inner core, and described conduit is through perforate.
14. superconducting magnets as claimed in claim 9, it is characterized in that, described outer wall or end socket establish perforate, and described inner core runs through perforate, and the end of inner core welds with outer wall or end socket.
15. superconducting magnets as claimed in claim 9, it is characterized in that, described coolant is liquid helium.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520490896.6U CN204808988U (en) | 2015-07-09 | 2015-07-09 | Superconducting magnet |
| US15/310,441 US10670675B2 (en) | 2014-11-04 | 2015-09-30 | Displacer in magnetic resonance imaging system |
| GB1707398.2A GB2547581B (en) | 2014-11-04 | 2015-09-30 | Displacer in magnetic resonance imaging system |
| PCT/CN2015/091148 WO2016070695A1 (en) | 2014-11-04 | 2015-09-30 | Displacer in magnetic resonance imaging system |
| US15/448,884 US9835701B2 (en) | 2014-11-04 | 2017-03-29 | Displacer in magnetic resonance imaging system |
| US15/721,801 US10996298B2 (en) | 2014-11-04 | 2017-09-30 | Displacer in magnetic resonance imaging system |
| US16/888,875 US11573279B2 (en) | 2014-11-04 | 2020-06-01 | Displacer in magnetic resonance imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520490896.6U CN204808988U (en) | 2015-07-09 | 2015-07-09 | Superconducting magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204808988U true CN204808988U (en) | 2015-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520490896.6U Active CN204808988U (en) | 2014-11-04 | 2015-07-09 | Superconducting magnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204808988U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108417338A (en) * | 2018-05-21 | 2018-08-17 | 哈尔滨工业大学 | The horizontal superconducting magnet helium vessel of sandwich |
| CN111292915A (en) * | 2020-04-28 | 2020-06-16 | 山东奥新医疗科技有限公司 | Nuclear magnetic resonance imaging superconducting magnet for extremity imaging |
| CN112908609A (en) * | 2021-03-17 | 2021-06-04 | 中国科学院合肥物质科学研究院 | Large-aperture high-magnetic-field 7.0T superconducting magnet for magnetic resonance imaging |
| CN113284691A (en) * | 2021-05-08 | 2021-08-20 | 中国科学院合肥物质科学研究院 | Zero-evaporation superconducting magnet system capable of saving liquid helium |
| CN113782293A (en) * | 2020-06-09 | 2021-12-10 | 上海联影医疗科技股份有限公司 | Cryostat and magnetic resonance system |
-
2015
- 2015-07-09 CN CN201520490896.6U patent/CN204808988U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108417338A (en) * | 2018-05-21 | 2018-08-17 | 哈尔滨工业大学 | The horizontal superconducting magnet helium vessel of sandwich |
| CN108417338B (en) * | 2018-05-21 | 2020-05-15 | 哈尔滨工业大学 | Horizontal superconducting magnet helium container with sandwich structure |
| CN111292915A (en) * | 2020-04-28 | 2020-06-16 | 山东奥新医疗科技有限公司 | Nuclear magnetic resonance imaging superconducting magnet for extremity imaging |
| CN111292915B (en) * | 2020-04-28 | 2020-08-11 | 山东奥新医疗科技有限公司 | Nuclear magnetic resonance imaging superconducting magnet for extremity imaging |
| CN113782293A (en) * | 2020-06-09 | 2021-12-10 | 上海联影医疗科技股份有限公司 | Cryostat and magnetic resonance system |
| CN113782293B (en) * | 2020-06-09 | 2024-04-23 | 上海联影医疗科技股份有限公司 | Cryostat and magnetic resonance system |
| CN112908609A (en) * | 2021-03-17 | 2021-06-04 | 中国科学院合肥物质科学研究院 | Large-aperture high-magnetic-field 7.0T superconducting magnet for magnetic resonance imaging |
| CN112908609B (en) * | 2021-03-17 | 2022-12-16 | 中国科学院合肥物质科学研究院 | Large-aperture high-magnetic-field 7.0T superconducting magnet for magnetic resonance imaging |
| CN113284691A (en) * | 2021-05-08 | 2021-08-20 | 中国科学院合肥物质科学研究院 | Zero-evaporation superconducting magnet system capable of saving liquid helium |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201807 Shanghai city Jiading District Industrial Zone Jiading Road No. 2258 Patentee after: Shanghai Lianying Medical Technology Co., Ltd Address before: 201807 Shanghai city Jiading District Industrial Zone Jiading Road No. 2258 Patentee before: SHANGHAI UNITED IMAGING HEALTHCARE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |