CN101958172B - Superconducting joint of cable conductor in double-chamber low-resistance tube - Google Patents
Superconducting joint of cable conductor in double-chamber low-resistance tube Download PDFInfo
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- CN101958172B CN101958172B CN2010102476584A CN201010247658A CN101958172B CN 101958172 B CN101958172 B CN 101958172B CN 2010102476584 A CN2010102476584 A CN 2010102476584A CN 201010247658 A CN201010247658 A CN 201010247658A CN 101958172 B CN101958172 B CN 101958172B
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Abstract
The invention discloses a superconducting joint of a cable conductor in a double-chamber low-resistance tube. The superconducting joint comprises a conductive plate and a rectangular stainless steel lateral plate; the conductive plate and the stainless steel lateral plate are welded hermetically; the stainless steel lateral plate is divided into an upper chamber and a lower chamber by the conductive plate; an upper superconducting cable and a lower superconducting cable are respectively put in the upper and lower chambers; a stainless steel cover plate is tightly pressed on the upper and lower superconducting cables respectively; the stainless steel cover plates and the stainless steel lateral plate are welded together hermetically; the front and back ends of a stainless steel box are hermetically welded onto a conductor armor tube and a liquid helium nozzle respectively; the front ends of the upper and lower superconducting cables are respectively led out from the conductor armor tube; and the tail ends of the upper and lower superconducting cables respectively push against the opening of the liquid helium nozzle on the back side wall of the stainless steel box. The invention has the advantages of simple structure and easy processing and mounting and separately finishes the vacuum leakage detection by adopting a double-chamber structure, thereby ensuring good electric contact between the upper and lower superconducting cables and the conductive plate.
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 the superconducting joint of a kind of pair of chamber low resistance pipe inner cable conductor.
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 the superconducting joint of a kind of pair of chamber low resistance pipe inner cable conductor, adopts double-chamber structure, and separate completion vacuum leak hunting work, and guarantees to have good electrical contact between upper and lower two hyperconductive cables and the conductive plate.
Technical scheme of the present invention is following:
The superconducting joint of a kind of pair of chamber low resistance pipe inner cable conductor; Include conductive plate and the stainless steel side plate that surrounds a rectangle; It is characterized in that: be the sealing welding between said conductive plate and the described stainless steel side plate; Said conductive plate is divided into upper and lower two chambers with described stainless steel side plate; Be placed with upper and lower hyperconductive cable in the upper and lower chamber respectively, be pressed with the stainless steel cover plate respectively on the said upper and lower hyperconductive cable, be the sealing welding between said stainless steel cover plate and the described stainless steel side plate; The front end of said stainless steel side plate seal weld respectively is connected to upper conductor armor pipe and following liquid helium ozzle; The rear end of stainless steel side plate 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), between upper and lower hyperconductive cable and the conductive plate through the solder welding, make to have well between upper and lower hyperconductive cable and the conductive plate to electrically contact; Though and do not have fine material between upper and lower hyperconductive cable and conductive plate and the copper soleplate, and after the heat treatment, can produce certain sintering between upper and lower hyperconductive cable and the conductive plate, realized well electrically contacting.
(4), the present invention adopts the mode of fine weldering of vacuum or explosive welding (EW) to weld together conductive plate and stainless steel side plate; Accomplish before making all be machined in magnet heat treatment; Only need weld after the heat treatment, can reduce because of machining butt joint Effect on Performance to conductive plate.
(5), magnet of the present invention is in when assembling, only needs weld conductive plate with the PbSn scolder, is suitable for execute-in-place.
(6), superconducting joint is installed in low place, High-Field can reduce the magnetoresistance of joint less than 3T.
Beneficial effect of the present invention:
(1), the present invention adopted double-chamber structure, two terminals of joint be separate, accomplish separately, they have oneself independently liquid helium passage, can independently carry out vacuum leak hunting.
(2), the present invention adopted special connector box, all are accomplished before being machined in magnet heat treatment, only need weld conductive plate after the heat treatment, can reduce because of machining butt joint Effect on Performance.
(3), upper and lower two joint terminal individual processing of the present invention; Separate; Can regulate the installation site easily during welding, can be used for the nipple and the coupling of large-scale superconducting magnet, especially be suitable between the superconducting magnet, being electrically connected between superconducting magnet and current feed.
(4), the present invention adopted several different methods to improve electrically contacting and reduced magnetoresistance between each component of cable termination, can reduce the resistance of superconducting joint effectively.
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 side plate front end, (b) is the left view at stainless steel side plate middle part, (c) is the left view of stainless steel side plate rear end.
Embodiment
Referring to Fig. 1; The superconducting joint of a kind of pair of chamber low resistance pipe inner cable conductor includes conductive plate 5 and the stainless steel side plate 2 that surrounds a rectangle, is the sealing welding between conductive plate 5 and the stainless steel side plate 2; Conductive plate 5 is divided into upper and lower two chambers with stainless steel side plate 2; Be placed with upper and lower hyperconductive cable 4,8 in the upper and lower chamber respectively, be pressed with stainless steel cover plate 3 respectively on the upper and lower hyperconductive cable 4,8, be the sealing welding between stainless steel cover plate 3 and the stainless steel side plate 2; The front end of stainless steel side plate 2 seal weld respectively is connected to upper conductor armor pipe 1 and following liquid helium ozzle 9; The rear end of stainless steel side plate 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:
Adopt fine weldering of vacuum or explosive welding (EW) mode to weld together conductive plate 5 and stainless steel side plate 2, form a special connector box; To remove greater than the conductor armor pipe of cable torque length again, and remove the electrodeposited coating (chromium or nickel) on upper and lower hyperconductive cable 4,8 surfaces, plate the PbSn scolder of 0.1mm at conductive plate 5 inner surfaces of connector box; Upper and lower hyperconductive cable 4,8 is penetrated connector box eventually; Press stainless steel cover 2 and sealing welding; The front and back ends of stainless steel side plate 2 respectively seal weld connect upper conductor armor pipe 1, down liquid helium ozzle 9 and lower conductor armor pipe 7, on liquid helium ozzle 6, form an independent conductors terminal; The conductor terminal is fixed on the auxiliary bracing frame, guarantees that it is indeformable in the magnet heat treatment process, after the heat treatment, the conductor terminal that two needs are connected welds together with the PbSn scolder, forms a superconducting joint.
Claims (1)
1. the superconducting joint of two chambers low resistance pipe inner cable conductor; Include conductive plate and the stainless steel side plate that surrounds a rectangle; It is characterized in that: be the sealing welding between said conductive plate and the described stainless steel side plate; Said conductive plate is divided into upper and lower two chambers with described stainless steel side plate, is placed with upper and lower hyperconductive cable in the upper and lower chamber respectively, is pressed with the stainless steel cover plate on the last hyperconductive cable; Be pressed with the stainless steel cover plate under the following hyperconductive cable, be the sealing welding between said stainless steel cover plate and the described stainless steel side plate; The front end of said stainless steel side plate seal weld respectively is connected to upper conductor armor pipe and following liquid helium ozzle; The rear end of stainless steel side plate 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 |
|---|---|---|---|
| CN2010102476584A CN101958172B (en) | 2010-07-30 | 2010-07-30 | Superconducting joint of cable conductor in double-chamber low-resistance tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102476584A CN101958172B (en) | 2010-07-30 | 2010-07-30 | Superconducting joint of cable conductor in double-chamber low-resistance tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101958172A CN101958172A (en) | 2011-01-26 |
| CN101958172B true CN101958172B (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102476584A Expired - Fee Related CN101958172B (en) | 2010-07-30 | 2010-07-30 | Superconducting joint of cable conductor in double-chamber low-resistance tube |
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| Country | Link |
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| CN (1) | CN101958172B (en) |
Families Citing this family (6)
| 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 |
| CN103336179B (en) * | 2013-06-21 | 2016-12-28 | 中国科学院合肥物质科学研究院 | The low-temperature resistance of CICC superconducting joint measures making and the measuring method of system |
| CN103346521B (en) * | 2013-06-21 | 2016-03-16 | 中国科学院合肥物质科学研究院 | The manufacture method of the connector box of Cable-in-conduit conductor superconducting joint |
| 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 |
| 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 |
| CN111540560A (en) * | 2020-05-22 | 2020-08-14 | 中国科学院合肥物质科学研究院 | Ten thousand ampere grade YBCO high-temperature superconducting current lead device and manufacturing method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3868216B2 (en) * | 2001-02-02 | 2007-01-17 | 三菱電機株式会社 | Compound superconducting coil and manufacturing method thereof |
| 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 |
| CN200950367Y (en) * | 2005-03-23 | 2007-09-19 | 深圳市沃尔核材股份有限公司 | Superconducting cable fitting |
| CN101477856A (en) * | 2009-01-22 | 2009-07-08 | 中国科学院等离子体物理研究所 | Cable-through joint construction for super-conduction armored conductor |
-
2010
- 2010-07-30 CN CN2010102476584A patent/CN101958172B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3868216B2 (en) * | 2001-02-02 | 2007-01-17 | 三菱電機株式会社 | Compound superconducting coil and manufacturing method thereof |
| CN200950367Y (en) * | 2005-03-23 | 2007-09-19 | 深圳市沃尔核材股份有限公司 | Superconducting cable fitting |
| 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 |
| CN101477856A (en) * | 2009-01-22 | 2009-07-08 | 中国科学院等离子体物理研究所 | Cable-through joint construction for super-conduction armored conductor |
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| Publication number | Publication date |
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| CN101958172A (en) | 2011-01-26 |
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