CN102779605A - Superconducting joint for superconducting magnet of magnetic resonance imaging system - Google Patents
Superconducting joint for superconducting magnet of magnetic resonance imaging system Download PDFInfo
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- CN102779605A CN102779605A CN2011101216796A CN201110121679A CN102779605A CN 102779605 A CN102779605 A CN 102779605A CN 2011101216796 A CN2011101216796 A CN 2011101216796A CN 201110121679 A CN201110121679 A CN 201110121679A CN 102779605 A CN102779605 A CN 102779605A
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Abstract
The invention discloses a superconducting joint for a superconducting magnet of a magnetic resonance imaging system. The superconducting joint comprises a base and a pressure cover, wherein a groove is arranged on the base, exposed superconducting filaments on end parts of two superconducting lines are combined together to be put in the groove; a pressure cover tightly presses the superconducting filaments together, and the pressure cover is in fastening connection with the base through a bolt. According to the invention, due to the adoption of the bolt connection, the base is firmly combined with the pressure cover and the superconducting filaments are pressed, so that the superconducting filaments of the two superconducting lines are in more tight contact, the success rate of connecting the superconducting joint is increased, and the performance of the superconducting joint is improved. A welding material in a superconducting state at low temperature can be further used for welding the superconducting joint; or an alloy material in a superconducting state at low temperature is used for carrying out pouring, thus an alloy end socket is formed outside the joint. Thus, two basic modes of the superconducting joints, such as superconducting filament contact and superconducting alloy material welding, are used, thus the success rate is further increased and the stability of the superconducting joint is enhanced.
Description
Technical field
The present invention relates to the joint design between the hyperconductive cable, be specifically related to a kind of superconducting joint structure that is used for the magnetic resonance imaging system superconducting magnet.
Background technology
Superconducting magnet is one of critical component of high-field magnetic resonance medical imaging system, and superconducting joint is the parts that connect each independent superconducting coil in the superconducting magnet.The resistance sizes of superconducting joint and stability directly have influence on the performance of superconducting magnet, and the rate of decay of running current influences the magnetic resonance system main field rate of decay in the superconducting coil thereby wherein mainly have influence on.
In the prior art; To the niobium titanium superconducting line in the magnetic resonance imaging system superconducting magnet; The mode that forms superconducting joint mainly is; Use earlier acidic liquid to soak or use high temperature metal solution to melt the metallic matrix of niobium titanium superconducting line and the soldering tin material of parcel superconducting filament, through following several kinds of different connected modes superconducting filament is linked together then and be fixed on the supporting base:
(1) use some alloy material that niobium titanium superconducting filament is welded together, Wood's metal for example, these alloys also are superconducting state at the liquid helium warm area, make whole joint reach superconductivity like this.
(2) niobium titanium superconducting filament is directly welded together, do not use solder, for example ultra-sonic welded.
The superconducting filament of (3) superconducting filament in two superconducting lines being put together and form merging; Overlap the tiny metal tube of the preceding paragraph then; Use instruments such as pressing pipe wrench that metal tube is compressed; Niobium titanium superconducting filament in the metal tube is pressed on mutually together, does not use any solder, only depend on the tight contact between the superconducting filament to form superconducting joint.
Chinese invention patent application 201010247919.2 discloses a kind of low-resistance superconducting magnet inner joint; Comprise a stainless steel box body; The middle part of said stainless steel box body is provided with axial bar-shaped trough; Stacked hyperconductive cable, conductive plate and following hyperconductive cable in the bar-shaped trough from top to bottom successively, said top of going up hyperconductive cable is pressed with the stainless steel cover plate, is the sealing welding between said stainless steel cover plate and the stainless steel box body; The front end of said stainless steel box body seal weld respectively is connected to upper conductor armor pipe and following liquid helium ozzle; The rear end of stainless steel box body seal weld respectively is connected to lower conductor armor pipe and last liquid helium ozzle; The front end of said upper and lower hyperconductive cable is drawn from upper and lower conductor armor pipe respectively, and the end of upper and lower hyperconductive cable is against the mouth of pipe place of upper and lower liquid helium ozzle respectively.Though this joint design has lower resistance, owing to conduct electricity connections through the oxygen-free copper conductive plate between the upper and lower hyperconductive cable, so can not realize superconduction in the joint.In addition owing to contact the pressure that relies on the stainless steel cover plate between upper and lower hyperconductive cable and the conductive plate, and between stainless steel cover plate and the stainless steel box body for being welded to connect, be difficult to the assurance contact pressure, thus the generation contact resistance.
Summary of the invention
The technical problem that the present invention will solve provides a kind of new superconducting joint structure, can realize that two superconductions between the superconducting line connect, and in order to improving the stability of superconducting joint, thereby improves the stability of whole superconducting magnet and magnetic resonance imaging system.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: a kind of superconducting joint that is used for the magnetic resonance imaging system superconducting magnet comprises two superconducting lines; Superconducting filament is exposed in the end of two superconducting lines; Also comprise a pedestal and a gland, said pedestal is provided with groove one, and the superconducting filament of said two superconducting line ends lumps together and is placed in the said groove; Said gland is pressed on said superconducting filament together, and said gland is connected through bolted with said pedestal.
Preferably, the bottom of said gland also is provided with one convex tendon and matches with groove on the pedestal.
Preferably, said gland and pedestal are processed by oxygenless copper material.
Preferably, said bolt is processed by oxygen-free copper or stainless steel material.
Preferably, said superconducting line is copper base niobium titanium superconducting filament or aluminium base niobium titanium superconducting line.
Preferably, the superconducting filament of said two superconducting line ends also welds through the superconduction welding material mutually.
Further, said superconduction welding material is a Wood's metal.
Further, also weld mutually between said superconducting filament, pedestal and the gland through welding material.
Preferably, said pedestal, gland, bolt and superconducting filament by integral cast in an alloy end socket.
Further, said alloy end socket is made up of lead bismuth alloy.
Beneficial effect of the present invention embodies in the following areas at least:
(1) connects with bolt and make between pedestal and the gland strong bonded and to compress superconducting filament; This method can make more closely contact between the superconducting filament of two superconducting lines through the degree of tightening of regulating bolt; Thereby improve the success rate that superconducting joint connects, improve the performance of superconducting joint.
(2) through bolted, make superconducting filament closely on the basis of contact, can further use the welding material butt joint that is superconducting state under the low temperature to weld; Perhaps this superconducting joint is put into casting mold, pour into a mould, thereby form an alloy end socket in the outside of joint with the alloy material that is superconducting state under the low temperature.Like this, used the citation form of superconducting filament contact and two kinds of superconducting joints of superconductive alloy materials welding simultaneously, further improved success rate and improved the stability of superconducting joint.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain.
Fig. 1 is the perspective view of a kind of superconducting joint of the present invention.
Fig. 2 is the sketch map of superconducting joint shown in Figure 1 end.
Embodiment
Like Fig. 1, shown in Figure 2; A kind of superconducting joint that is used for the magnetic resonance imaging system superconducting magnet of the present invention comprises a pedestal 5 and a gland 3; Pedestal 5 is provided with the end of 51, two superconducting lines of one groove 1,2 and exposes superconducting filament 6, and the superconducting filament 6 of these two superconducting line 1,2 ends is lumped together and is placed in the said groove 51; With gland 3 said superconducting filament 6 is pressed on together, is fastenedly connected through bolt 4 between gland 3 and the pedestal 5.Better to compress effect in order reaching, one convex tendon 31 can also to be set in the bottom of gland 3 to match with groove 51 on the pedestal.
After accomplishing above-mentioned joint, can adopt following two kinds of different modes to come above-mentioned joint is further handled:
One, exposed parts, pedestal 5 and the gland 3 with superconducting line 1, superconducting line 2, superconducting filament 6 uses the welding alloy material to weld together, and makes these parts be connected firmly as far as possible.
Two, superconducting line 1 bottom, superconducting line 2 bottoms, superconducting filament 6, pedestal 5 and gland 3 are put into casting mold, with pouring in the casting mold after the welding alloy fusing, cooling forming forms an alloy end socket then.
After four bolts 4 are tightened, use the welding material that is superconducting state under the low temperature, such as Wood's metal, superconducting filament 6 exposed parts of superconducting line 1,2 are welded together, and also weld together together with pedestal 5, gland 3, make these parts be connected firmly as far as possible.
After four bolts 4 are tightened, the bottom of superconducting line 1, bottom, superconducting filament 6, pedestal 5 and the gland 3 of superconducting line 2 are put into a columnar casting mold.Welding material with being superconducting state under the low temperature is cast, such as pouring in the casting mold with after the lead bismuth alloy fusing, and cooling forming then, thus forming an alloy end socket in the outside of superconducting joint, casting mold uses oxygenless copper material to process.
Above-mentioned welding and casting dual mode can choose at random, and also can adopt welding manner to handle such as the aluminium base niobium titanium superconducting line among the embodiment 2, and behind the formation of the copper base niobium titanium superconducting line among the embodiment 1 joint, also can handle with the casting mode.
Claims (10)
1. a superconducting joint that is used for the magnetic resonance imaging system superconducting magnet comprises two superconducting lines (1,2); Two superconducting lines (1; 2) superconducting filament (6) is exposed in end, it is characterized in that, also comprises a pedestal (5) and a gland (3); Said pedestal (5) is provided with one groove (51); The superconducting filament of said two superconducting line ends (6) lumps together and is placed in the said groove (51), and said gland (3) is pressed on said superconducting filament (6) together, and said gland (3) is fastenedly connected through bolt (4) with said pedestal (5).
2. superconducting joint according to claim 1 is characterized in that, the bottom of said gland (3) also is provided with one convex tendon (31) and matches with groove (51) on the pedestal.
3. superconducting joint according to claim 1 is characterized in that, said gland (3) and pedestal are processed by oxygenless copper material.
4. superconducting joint according to claim 1 is characterized in that, said bolt (4) is processed by oxygen-free copper or stainless steel material.
5. superconducting joint according to claim 1 is characterized in that, said superconducting line (1,2) is copper base niobium titanium superconducting line or aluminium base niobium titanium superconducting line.
6. superconducting joint according to claim 1 is characterized in that, the superconducting filament (6) of said two superconducting lines (1,2) end also welds through the superconduction welding material mutually.
7. superconducting joint according to claim 6 is characterized in that, said superconduction welding material is a Wood's metal.
8. superconducting joint according to claim 6 is characterized in that, also welds mutually through welding material between said superconducting filament (6), pedestal (5) and the gland (3).
9. superconducting joint according to claim 1 is characterized in that, said pedestal (5), gland (3), bolt (4) and superconducting filament (6) by integral cast in an alloy end socket.
10. superconducting joint according to claim 9 is characterized in that, said alloy end socket is made up of lead bismuth alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110121679.6A CN102779605B (en) | 2011-05-12 | 2011-05-12 | Superconducting joint for superconducting magnet of magnetic resonance imaging system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110121679.6A CN102779605B (en) | 2011-05-12 | 2011-05-12 | Superconducting joint for superconducting magnet of magnetic resonance imaging system |
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| CN102779605A true CN102779605A (en) | 2012-11-14 |
| CN102779605B CN102779605B (en) | 2014-11-19 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950206A (en) * | 2014-04-03 | 2014-07-30 | 江苏美时医疗技术有限公司 | Method for manufacturing magnetic resonance superconducting magnet pull bar |
| CN106451029A (en) * | 2016-09-22 | 2017-02-22 | 合肥聚能电物理高技术开发有限公司 | Indium wire overlapping device and overlapping process of superconduction connector |
| CN106825834A (en) * | 2017-03-21 | 2017-06-13 | 合肥中科离子医学技术装备有限公司 | A kind of welder and its method for NbTi/Cu superconducting coils inside superconducting joint |
| CN109741899A (en) * | 2019-01-07 | 2019-05-10 | 中国科学院合肥物质科学研究院 | Adjustable support structure for large high-temperature superconductive current lead heat exchanger section |
| CN109786063A (en) * | 2019-01-07 | 2019-05-21 | 中国科学院合肥物质科学研究院 | Superconducting coil joint connection in a kind of superconductive current limiter |
| CN110600896A (en) * | 2019-09-27 | 2019-12-20 | 中国科学院理化技术研究所 | Multi-strand superconducting metal wire joint structure |
| CN114267983A (en) * | 2021-12-24 | 2022-04-01 | 中国科学院合肥物质科学研究院 | Conduction cooling type NbTi superconducting wire joint device and joint manufacturing method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950206A (en) * | 2014-04-03 | 2014-07-30 | 江苏美时医疗技术有限公司 | Method for manufacturing magnetic resonance superconducting magnet pull bar |
| CN106451029A (en) * | 2016-09-22 | 2017-02-22 | 合肥聚能电物理高技术开发有限公司 | Indium wire overlapping device and overlapping process of superconduction connector |
| CN106451029B (en) * | 2016-09-22 | 2018-07-13 | 合肥聚能电物理高技术开发有限公司 | Superconducting joint indium silk lap device and its lap joint process |
| CN106825834A (en) * | 2017-03-21 | 2017-06-13 | 合肥中科离子医学技术装备有限公司 | A kind of welder and its method for NbTi/Cu superconducting coils inside superconducting joint |
| CN106825834B (en) * | 2017-03-21 | 2018-03-30 | 合肥中科离子医学技术装备有限公司 | A kind of welder and its method for superconducting joint inside NbTi/Cu superconducting coils |
| CN109741899A (en) * | 2019-01-07 | 2019-05-10 | 中国科学院合肥物质科学研究院 | Adjustable support structure for large high-temperature superconductive current lead heat exchanger section |
| CN109786063A (en) * | 2019-01-07 | 2019-05-21 | 中国科学院合肥物质科学研究院 | Superconducting coil joint connection in a kind of superconductive current limiter |
| CN109741899B (en) * | 2019-01-07 | 2020-11-13 | 中国科学院合肥物质科学研究院 | Adjustable support structure for large-scale high-temperature superconducting current lead heat exchanger section |
| CN109786063B (en) * | 2019-01-07 | 2021-01-12 | 中国科学院合肥物质科学研究院 | Superconducting coil joint connecting device in superconducting current limiter |
| CN110600896A (en) * | 2019-09-27 | 2019-12-20 | 中国科学院理化技术研究所 | Multi-strand superconducting metal wire joint structure |
| CN114267983A (en) * | 2021-12-24 | 2022-04-01 | 中国科学院合肥物质科学研究院 | Conduction cooling type NbTi superconducting wire joint device and joint manufacturing method thereof |
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| CN102779605B (en) | 2014-11-19 |
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Effective date of registration: 20170321 Address after: 518000 room C, building 202-207, No.1 building, No. six Nanshan District Road, Shenzhen, Guangdong, China Patentee after: Shenzhen Union Medical Technology Co., Ltd. Address before: 201203 Jiading Jiading District Industrial Zone, No. Pratt & Whitney Road, room 3, building 1098, room 333 Patentee before: Shanghai United Imaging Healthcare Co., Ltd. |
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