CN101923936B - Low-resistance superconducting magnet inner joint - Google Patents
Low-resistance superconducting magnet inner joint Download PDFInfo
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- CN101923936B CN101923936B CN2010102479192A CN201010247919A CN101923936B CN 101923936 B CN101923936 B CN 101923936B CN 2010102479192 A CN2010102479192 A CN 2010102479192A CN 201010247919 A CN201010247919 A CN 201010247919A CN 101923936 B CN101923936 B CN 101923936B
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- stainless steel
- box body
- steel box
- superconducting
- pipe
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Abstract
The invention discloses a low-resistance superconducting magnet inner joint comprising a stainless steel box body. An axial bar-shaped groove is arranged in the middle part of the stainless steel box body; an upper superconducting cable, a conductive plate and a lower superconducting cable are stacked sequentially in the bar-shaped groove from top to bottom; a stainless steel cover plate is pressed above the upper superconducting cable; the stainless steel cover plate and the stainless steel box body are tightly welded; a conductor armour pipe and a liquid helium pipe nozzle are tightly welded at the front and the rear ends of the stainless steel box body; the front ends of the upper and the lower superconducting cables are respectively introduced from the conductor armour pipe; and the tail ends of the upper and the lower superconducting cables respectively support against a pipe orifice of the liquid helium pipe on the side wall at the rear end of the stainless steel box body. The invention is simple in structure and easy to process and install, ensures that all procedures are finished before thermal treatment, i.e. the superconducting joint is processed, assembled and fixed without any procedures after thermal treatment when the magnet is wound, thereby ensuring that the superconducting magnet inner joint can not be damaged at all after thermal treatment.
Description
Technical field
The present invention relates to the parts in a kind of large-scale superconducting magnet apparatus, belongs to the important component part of large-scale superconducting magnet apparatus, is specifically related to a kind of low-resistance superconducting magnet inner joint.
Background technology
Large-scale superconducting magnet adopts pipe inner cable conductor (CICC) structure more; Owing to receive the restriction of superconducting conductor processing length; And the needs that are electrically connected between the different superconducting magnets; Superconducting joint is inevitably for large-scale superconducting magnet apparatus, and it is mainly used in the electrical connection between superconducting conductor and current feed, the different superconducting conductor.For the outer superconducting magnet of the high-intensity magnetic field hybrid magnet of steady operation, because the work characteristics of steady operation, the size of connection resistance can directly have influence on the cooling load of cryogenic system, thereby influences the stable operation of superconducting magnet.For the CICC conductor that adopts Nb3Sn; Superconducting magnet also need be heat-treated could form superconductor; And the Nb3Sn material after the heat treatment has the characteristic that is highly brittle; Can bring many difficulties to aspects such as the undergauge of superconducting joint, welding, installations, should avoid after heat treatment machining as much as possible superconducting joint.
Adopt of traditional C ICC superconducting joint is inserted in the copper contact tube earlier with cable more, and the armor with contact tube end and end conductor is tightly connected again.Undergauge is accomplished the making at conductor terminal then; The terminal that again two needs is connected connects with the red copper conducting block.This manufacture craft relative complex is difficult to guarantee that each joint keeps identical technology; Because contact tube inside and red copper conducting block surface all need fine material welding, especially contact tube inner, and the operating space is very little, zinc-plated effect can directly influence the resistance of joint simultaneously.
Summary of the invention
The technical problem that the present invention will solve provides a kind of low-resistance superconducting magnet inner joint, guarantees that the internal connection of superconducting magnet is without any damage after heat treatment.
Technical scheme of the present invention is following:
A kind of low-resistance superconducting magnet inner joint; Include the stainless steel box body; It is characterized in that: 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 described 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 described 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.
The present invention adopts that following method reaches that resistance is little, intensity good, simple in structure, good manufacturability, the purpose of design that is easy to assemble:
(1), length of said joint of the present invention requires to be not less than the sub-cable torque of CICC cable afterbody, can guarantee that so upper and lower two hyperconductive cable terminals that joint connects have enough big electrical-contact area, can effectively reduce connection resistance.
(2), through pressing the stainless steel cover plate, make to make decrease of void fraction to 20% in the hyperconductive cable can have better between hyperconductive cable to electrically contact, effectively reduce connection resistance.
(3) though, do not have fine material between upper and lower hyperconductive cable and the conductive plate, after the heat treatment, upper and lower hyperconductive cable and conductive plate can produce certain sintering, achieve well to electrically contact; Owing to adopt the material of the oxygen-free copper of high conductivity, can effectively reduce connection resistance simultaneously as conductive plate.
(4), all process steps of the present invention accomplishes before heat treatment, can avoid machining butt joint Effect on Performance.
(5), adopt type structure of the present invention, do not have copper and stainless Welding Problems, technology is simple.
(6), the superconducting joint outer surface is stainless steel structure entirely, intensity is high.
(7), superconducting joint is installed in low place, High-Field can reduce the magnetoresistance of joint less than 3T.
Beneficial effect of the present invention:
The present invention is simple in structure; Be easy to processing and installation, all process steps is all accomplished before heat treatment, promptly when the magnet coiling, just accomplishes processing, the assembling and fixing of superconducting joint; Do not need any operation after the heat treatment, guaranteed that the internal connection of superconducting magnet is without any damage after heat treatment.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a left view of the present invention, and wherein (a) is the left view of stainless steel box body front end, (b) is the left view at stainless steel box body middle part, (c) is the left view of stainless steel box body rear end.
Embodiment
Referring to Fig. 1; A kind of low-resistance superconducting magnet inner joint; Include stainless steel box body 2, the middle part of stainless steel box body 2 is provided with axial bar-shaped trough, has stacked hyperconductive cable 4, conductive plate 5 and following hyperconductive cable 8 in the bar-shaped trough from top to bottom successively; The top of last hyperconductive cable 4 is pressed with stainless steel cover plate 3, is the sealing welding between stainless steel cover plate 3 and the stainless steel box body 2; The front end of stainless steel box body 2 seal weld respectively is connected to upper conductor armor pipe 1 and following liquid helium ozzle 9; The rear end of stainless steel box body 2 seal weld respectively is connected to lower conductor armor pipe 7 and last liquid helium ozzle 6; The front end of upper and lower hyperconductive cable 4,8 is drawn from upper and lower conductor armor pipe 1,7 respectively, and the end of upper and lower hyperconductive cable 4,8 is against the mouth of pipe place of upper and lower liquid helium ozzle 6,9 respectively.
The assembling process of each parts of the present invention is following:
Remove the upper and lower conductor armor pipe 1,7 of suitable length; And remove the electrodeposited coating (chromium or nickel) on upper and lower hyperconductive cable 4,8 surfaces; To descend hyperconductive cable 8 to penetrate stainless steel box body 2 earlier; Again conductive plate 5 is placed on down on the hyperconductive cable 8, penetrates hyperconductive cable 4 then, stainless steel cover plate 3 is pressed on the hyperconductive cable 4 and with 2 sealings of stainless steel box body welds; Again stainless steel box body 2 forward and backward two ends are welded with upper and lower conductor armor pipe 1,7 and 6,9 sealings of upper and lower liquid helium ozzle respectively, so just form a complete superconducting joint.
Claims (1)
1. low-resistance superconducting magnet inner joint; Comprise the stainless steel box body; It is characterized in that: 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 described 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 described 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102479192A CN101923936B (en) | 2010-07-30 | 2010-07-30 | Low-resistance superconducting magnet inner joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102479192A CN101923936B (en) | 2010-07-30 | 2010-07-30 | Low-resistance superconducting magnet inner joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101923936A CN101923936A (en) | 2010-12-22 |
| CN101923936B true CN101923936B (en) | 2012-08-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102479192A Expired - Fee Related CN101923936B (en) | 2010-07-30 | 2010-07-30 | Low-resistance superconducting magnet inner joint |
Country Status (1)
| Country | Link |
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| CN (1) | CN101923936B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723160B (en) * | 2012-05-31 | 2014-01-29 | 西部超导材料科技股份有限公司 | Superconducting magnet joint and manufacturing method thereof |
| CN102769214A (en) * | 2012-07-18 | 2012-11-07 | 合肥科烨电物理设备制造有限公司 | High-current distributed superconducting conductor joint |
| CN102751594A (en) * | 2012-07-18 | 2012-10-24 | 合肥科烨电物理设备制造有限公司 | U-shaped curving connection box for superconducting conductor, and mounting method of U-shaped curving connection box |
| DE102012223366A1 (en) | 2012-12-17 | 2014-06-18 | Siemens Aktiengesellschaft | Superconducting coil device with coil winding and contacts |
| CN104733151B (en) * | 2013-12-20 | 2019-03-15 | 通用电气公司 | For storing the device and method of superconductor line and using the superconducting magnet system of the device |
| CN107104293B (en) * | 2017-04-26 | 2019-07-02 | 中国科学院合肥物质科学研究院 | Two low temperature superconducting cable terminal jointing components and preparation method thereof |
| CN108321556B (en) * | 2017-12-11 | 2020-01-31 | 北京交通大学 | Welding device for superconducting cable joint |
| CN109273244B (en) * | 2018-10-09 | 2020-08-21 | 合肥聚能电物理高技术开发有限公司 | Winding process of superconducting CICC cylindrical coil |
| CN112743301A (en) * | 2020-12-29 | 2021-05-04 | 中国科学院合肥物质科学研究院 | Method for manufacturing Bi-2212 high-temperature superconducting joint |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913231A (en) * | 2006-06-10 | 2007-02-14 | 中国科学院等离子体物理研究所 | Small volume low loss superconductor CICC connector structure |
| CN101694908A (en) * | 2009-09-30 | 2010-04-14 | 中国科学院等离子体物理研究所 | Low temperature superconducting assembly with low joint resistance for high temperature superconducting current lead cold end |
-
2010
- 2010-07-30 CN CN2010102479192A patent/CN101923936B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913231A (en) * | 2006-06-10 | 2007-02-14 | 中国科学院等离子体物理研究所 | Small volume low loss superconductor CICC connector structure |
| CN101694908A (en) * | 2009-09-30 | 2010-04-14 | 中国科学院等离子体物理研究所 | Low temperature superconducting assembly with low joint resistance for high temperature superconducting current lead cold end |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101923936A (en) | 2010-12-22 |
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