CN106158139A - A kind of high-temperature superconductor CICC conductor and manufacture method thereof - Google Patents
A kind of high-temperature superconductor CICC conductor and manufacture method thereof Download PDFInfo
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- CN106158139A CN106158139A CN201610575515.3A CN201610575515A CN106158139A CN 106158139 A CN106158139 A CN 106158139A CN 201610575515 A CN201610575515 A CN 201610575515A CN 106158139 A CN106158139 A CN 106158139A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
- H01B12/02—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by their form
- H01B12/08—Stranded or braided wires
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/22—Metal wires or tapes, e.g. made of steel
- H01B7/226—Helicoidally wound metal wires or tapes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
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Abstract
The invention discloses a kind of high-temperature superconductor CICC conductor and manufacture method thereof, conductor includes hyperconductive cable, folded band, internal layer armor, outer layer armor.Method include successively hyperconductive cable strand system, wear pull, conductor molding, the several step of heat treatment.The present invention provides important parameter for the CICC conductor development of large high-temperature superconduction from now on.
Description
Technical field
The present invention relates to superconducting conductor field in tokamak device, specifically a kind of high-temperature superconductor CICC conductor and system thereof
Make method.
Background technology
The use of clean energy resource fusion energy is one of dream of the mankind, and Tokamak type magnetic confinement nuclear fusion device is to produce
The reliable apparatus of raw fusion energy, Superconducting tokamak is to realize the important leverage that fusion reactor runs continuously.China is successfully building
Found and run full superconduction on-circular cross-section tokamak EAST(Experimental Advanced Superconducting
Tokamak), on the basis of, International Thermal-Nuclear Experimental Reactor ITER(International Thermonuclear is actively developed
Experimental Reactor) building-up work.With entering, every country has also begun to the beforehand research work of fusion reactor of future generation.
Hyperconductive cable is the vitals of tokamak device, and its technology is the key technology of fusion engineering.Showing of fusion reactor of future generation
Work feature is, the highfield of central solenoid coils and longitudinal field coil all will be more than 12T.By low-temperature superconducting wire upper critical field
Restriction, use Conventional cryogenic superconductor can not prepare the magnet of more highfield, the magnet requirement of coiling more highfield
Material still is able to keep relatively high critical current densities in more than the magnetic field of 20T.Therefore, seek that there is more excellent comprehensive performance
Superconductor and high field magnet be the problem that must solve in following controllable magnetic constraint HCSB-DEMO and commercialization process.Pottery
Porcelain oxide high-temperature superconductor has high irreversibility field and excellent magnetic field current-carring characteristic because of it under 4.2K, is therefore
Build the ideal material of high field magnet.In high temperature superconducting materia, Bi2Sr2Ca1Cu2OX (Bi-2212) is uniquely can be prepared as
The material of isotropism round wires, even if it still can the engineering that has significant practical applications of carrying tool at 4.2K outfield up to 45T
Electric current density, is therefore current the most most (> 20T under High-Field) high temperature superconducting materia of application prospect.
Two critical components manufacturing CICC conductor are hyperconductive cable and conductor armor.Firstly, since Bi-2212 superconduction material
Material belongs to ceramic material, and mechanical property is poor, during cold operation, due to thermal expansion and the effect of Lorentz force, superconduction material
The inside of material is easy to occur that core filaments ruptures, thus causes the reduction of critical performance.To this end, we devise a kind of new structure
Cable and cable twist technique processed, through checking, the novel construction of cable and stranded cable technique fully meet design requirement, thus solution
A difficult problem for Bi2212 cable of having determined strand system.
Conductor structure design aspect, traditional CICC conductor is from inside to outside typically by central cooling tube, hyperconductive cable, folded bag
Band, armor composition.To some CICC conductor, its cooling medium passes through from cable space, does not therefore have central cooling tube.And it is right
In Bi2212 CICC conductor, the structure similar to tradition CICC conductor can be selected, but need to improve a little.This be due to
Caused by the heat treatment environment that Bi2212 superconducting line is special.First, Bi2212 heat treatment needs high temperature, elevated pressures, pure oxygen environment,
Therefore, a lot of materials can aoxidize in high-temperature oxygen, deformation.Two are, the generation of Bi2212 superconductor, need oxygen element to join
With reaction.And meeting and oxygen reaction under the element high temperature in alloy, such as rustless steel or nickel-base alloy, thus affect Bi2212's
Generate, cause superconducting line hydraulic performance decline.Even if using nickel base superalloy as armor, it is also possible to affect Bi2212 superconducting line
Performance.And high temperature alloy intensity is high, difficult processing, and cable during molding, may be damaged.
Summary of the invention it is an object of the invention to provide a kind of high-temperature superconductor CICC conductor and manufacture method thereof, existing to solve
With the presence of the problem of superconducting conductor in technology tokamak device.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of high-temperature superconductor CICC conductor, it is characterised in that: including:
Hyperconductive cable, on hyperconductive cable, spiral winding has the folded band that Ag or Ag-Mg alloy material is made,
Internal layer protective layer, the folded band being made up of 316L material cladding is wrapped on the hyperconductive cable being surrounded by Ag band,
Outer layer armor, it is coated with internal layer armor, and outer layer armor is made up of stainless steel material.
A kind of preparation method of high-temperature superconductor CICC conductor, it is characterised in that: comprise the following steps:
(1), hyperconductive cable strand system: stranded superconductive line strand is formed hyperconductive cable together；The strand system of hyperconductive cable will be according to electricity
The structure of cable, a point multistage strand system forms；Stranded cable equipment requirements Periostracum Cicadae is turned round, and tension automatic control is adjustable, and mould uses the poly-second of tetrafluoro
Alkene material, the tension force of one-level cable is less than 20N, and two grades of cable tension force are less than 40N, and three grades of cable tension force are less than 70N, and level Four cable is opened
Power is less than 150N, and Pyatyi cable tension force is less than 250N；The Ag packet stack rate of cable is more than 50%, and the wrapped one layer of 316L of outer layer is used for
Protection rustless steel band, its packet stack rate general control is at 30%-40%；Cable strand system during, it is impossible to occur flatten and broken string
Situation；
(2), wear and pull: the cable being surrounded with protective layer is penetrated outer layer armor；
After cable completes, will carry out wearing cable；First carry out the welding of outermost layer rustless steel armor, be welded to the length of conductor requirement,
Cable is penetrated the rustless steel armor after having welded the most again, then wears cable and complete；
During wearing cable, pulling force to be controlled not can exceed that 50kN；
(3), conductor molding: wear after cable terminates, cable and the gap about 2.0mm with stainless steel tube, it is therefore desirable to conductor is carried out
Undergauge, one is to eliminate the gap between cable and rustless steel, and two is the voidage making conductor meet about 30%；Conductor molding
The multi-pass forming machine using independent development is completed；Outer diameter tolerance after molding is less than 0.2mm；
(4), heat treatment: the conductor after molding before use, needs to carry out the assessment of conductor properties of sample, and the length of sample is at least
It it is 4 meters；Before sample is estimated, need to carry out heat treatment；Bi2212 conductor heat treatment needs at high pressure, the oxygen atmosphere of high temperature
Under carry out, wherein pressure maintains less than 50 atmospheric pressure, needs heat treatment 48 hours under the high temperature of 890 degree, and oxygen passes through
Outer connection, passes through from the inside of conductor.
The present invention is that research and development large high-temperature superconduction CICC conductor and large high-temperature superconducting coil will provide important from now on
Technical Reference, experiment proves that in the CICC conductor 4.2 K temperature that the method manufactures, the current capacity under the conditions of self-fields is more than
10KA.And conductor itself can also carry out more performance test as experiment porch, for the CICC conductor of large high-temperature superconduction from now on
Develop and important parameter is provided.
Accompanying drawing explanation
Fig. 1 is conductor structure front view of the present invention.
Fig. 2 is conductor structure three-dimensional cutaway view of the present invention.
Detailed description of the invention
As shown in Figure 1 and Figure 2, a kind of high-temperature superconductor CICC conductor, including:
Hyperconductive cable 1, on hyperconductive cable 1, spiral winding has the folded band 2 that Ag or Ag-Mg alloy material is made,
Internal layer protective layer 3, its cladding is wound with the hyperconductive cable 1 of folded band 2, and internal layer protective layer 3 is made up of 316L material,
Outer layer armor 4, it is coated with internal layer armor 3, and outer layer armor 4 is made up of stainless steel material.
The preparation method of a kind of high-temperature superconductor CICC conductor, comprises the following steps:
(1), hyperconductive cable strand system: stranded superconductive line strand is formed hyperconductive cable together；The strand system of hyperconductive cable will be according to electricity
The structure of cable, a point multistage strand system forms.Stranded cable equipment requirements Periostracum Cicadae is turned round, and tension automatic control is adjustable, and mould uses the poly-second of tetrafluoro
Alkene material, the tension force of one-level cable is less than 20N, and two grades of cable tension force are less than 40N, and three grades of cable tension force are less than 70N, and level Four cable is opened
Power is less than 150N, and Pyatyi cable tension force is less than 250N.The Ag packet stack rate of cable is more than 50%, and the wrapped one layer of 316L of outer layer is used for
Protection rustless steel band, its packet stack rate general control is at 30%-40%.Cable strand system during, it is impossible to occur flatten and broken string
Situation.
(2), wear and pull: the cable being surrounded with protective layer is penetrated outer layer armor；
After cable completes, will carry out wearing cable.First carry out the welding of outermost layer rustless steel (316L or 316LN) armor, be welded to lead
The length that body requires, penetrates cable the rustless steel armor after having welded the most again, then wears cable and complete.
During wearing cable, pulling force to be controlled not can exceed that 50kN.
(3), conductor molding: wear after cable terminates, cable and the gap about 2.0mm with stainless steel tube, it is therefore desirable to conductor
Carrying out undergauge, one is to eliminate the gap between cable and rustless steel, and two is the voidage making conductor meet about 30%.Conductor
The multi-pass forming machine using independent development is completed by molding.Outer diameter tolerance after molding is less than 0.2mm.
(4), heat treatment: the conductor after molding before use, needs to carry out the assessment of conductor properties of sample, the length of sample
At least 4 meters.Before sample is estimated, need to carry out heat treatment.Bi2212 conductor heat treatment needs at high pressure, the oxygen of high temperature
Carrying out under environment, wherein pressure maintains less than 50 atmospheric pressure, needs heat treatment 48 hours, oxygen under the high temperature of 890 degree
By outer connection, pass through from the inside of conductor.
The invention discloses a novel high-temperature superconductor CICC conductor, the hyperconductive cable of use is Bi2212 money base superconduction
Line.Conductor is folded band by Bi2212 hyperconductive cable, Ag or Ag-Mg, 316L internal layer protective layer, rustless steel outer layer armor are constituted.Lead
Key technology and technique in body manufacture include: cable strand system, cable wear cable, conductor molding, conductor heat treatment.
Conductor structure of the present invention is made up of hyperconductive cable, folded band, internal layer protective layer, outer layer armor the most respectively.
Wherein folding band material and have selected Ag or Ag-Mg alloy, this is that some requires owing to the material of internal layer armor to meet:
1) vigorous reaction will not be produced with oxygen in high-temperature oxygen
2), in heat treatment process, the element in alloy will not react with Bi2212 powder
Ag-Mg alloy does not produces vigorous reaction with oxygen, and identical, thus without impact with the sheath layer material of Bi2212 superconducting line
Bi2212 powder and the reaction of oxygen, generate Bi2212 phase.
316L rustless steel band is as internal layer protective layer, when wearing cable and undergauge, the folded band of cable can be protected not damage
Wound, it is to avoid cable directly contacts with outside rustless steel armor.
Select rustless steel as outer layer armor, mainly play support and protective effect.
In the inventive method:
After cable penetrates armor, before heat treatment, need conductor is carried out undergauge, reduced the space between strand, it is ensured that
Under electromagnetic force, strand will not occur big strain.And contract through after size should not be the least because by conductor contract through the least
Making strand suffer excessive compression, two is the least flowing that can affect coolant in space for a moment.Thus, the control of undergauge size is very
Important.
The molding at a slow speed that conductor molding will use multi-roll, multi-pass forming machine to carry out conductor, all will first before each molding
Blank pipe is used to carry out wheels debugging, it is ensured that conductor size accurate.
Conductor manufacturing process is as follows:
Cable → conductor molding → heat treatment is made → worn to hyperconductive cable strand.
Claims (2)
1. a high-temperature superconductor CICC conductor, it is characterised in that: including:
Hyperconductive cable, on hyperconductive cable, spiral winding has the folded band that Ag or Ag-Mg alloy material is made,
Internal layer protective layer, the folded band being made up of 316L material cladding is wrapped on the hyperconductive cable being surrounded by Ag band,
Outer layer armor, it is coated with internal layer armor, and outer layer armor is made up of stainless steel material.
2. the preparation method of a high-temperature superconductor CICC conductor, it is characterised in that: comprise the following steps:
(1), hyperconductive cable strand system: stranded superconductive line strand is formed hyperconductive cable together；The strand system of hyperconductive cable will be according to electricity
The structure of cable, a point multistage strand system forms；Stranded cable equipment requirements Periostracum Cicadae is turned round, and tension automatic control is adjustable, and mould uses the poly-second of tetrafluoro
Alkene material, the tension force of one-level cable is less than 20N, and two grades of cable tension force are less than 40N, and three grades of cable tension force are less than 70N, and level Four cable is opened
Power is less than 150N, and Pyatyi cable tension force is less than 250N；The Ag packet stack rate of cable is more than 50%, and the wrapped one layer of 316L of outer layer is used for
Protection rustless steel band, its packet stack rate general control is at 30%-40%；Cable strand system during, it is impossible to occur flatten and broken string
Situation；
(2), wear and pull: the cable being surrounded with protective layer is penetrated outer layer armor；
After cable completes, will carry out wearing cable；First carry out the welding of outermost layer rustless steel armor, be welded to the length of conductor requirement,
Cable is penetrated the rustless steel armor after having welded the most again, then wears cable and complete；
During wearing cable, pulling force to be controlled not can exceed that 50kN；
(3), conductor molding: wear after cable terminates, cable and the gap about 2.0mm with stainless steel tube, it is therefore desirable to conductor is carried out
Undergauge, one is to eliminate the gap between cable and rustless steel, and two is the voidage making conductor meet about 30%；Conductor molding
The multi-pass forming machine using independent development is completed；Outer diameter tolerance after molding is less than 0.2mm；
(4), heat treatment: the conductor after molding before use, needs to carry out the assessment of conductor properties of sample, and the length of sample is at least
It it is 4 meters；Before sample is estimated, need to carry out heat treatment；Bi2212 conductor heat treatment needs at high pressure, the oxygen atmosphere of high temperature
Under carry out, wherein pressure maintains less than 50 atmospheric pressure, needs heat treatment 48 hours under the high temperature of 890 degree, and oxygen passes through
Outer connection, passes through from the inside of conductor.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107516560A (en) * | 2017-07-31 | 2017-12-26 | 中国科学院合肥物质科学研究院 | A kind of nuclear fusion superconducting conductor of new structure |
| CN110401046A (en) * | 2019-07-16 | 2019-11-01 | 中国科学院合肥物质科学研究院 | The method for reducing superconductive cable A.C.power loss in CICC superconducting conductor joint box |
| CN110828058A (en) * | 2019-11-14 | 2020-02-21 | 中国科学院合肥物质科学研究院 | High-current-carrying high-temperature superconducting composite conductor based on split stacking structure |
| CN111584150A (en) * | 2020-04-01 | 2020-08-25 | 北京交通大学 | CICC conductor |
| CN111613384A (en) * | 2020-05-21 | 2020-09-01 | 中国科学院合肥物质科学研究院 | CICC conductor of ReBCO high-temperature superconducting tape and manufacturing method thereof |
| CN112820470A (en) * | 2021-01-05 | 2021-05-18 | 中国科学院合肥物质科学研究院 | MgB2CICC conductor structure and manufacturing method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107516560A (en) * | 2017-07-31 | 2017-12-26 | 中国科学院合肥物质科学研究院 | A kind of nuclear fusion superconducting conductor of new structure |
| CN110401046A (en) * | 2019-07-16 | 2019-11-01 | 中国科学院合肥物质科学研究院 | The method for reducing superconductive cable A.C.power loss in CICC superconducting conductor joint box |
| CN110401046B (en) * | 2019-07-16 | 2020-10-16 | 中国科学院合肥物质科学研究院 | Method for reducing alternating current loss of superconducting cable in CICC superconducting conductor joint box |
| CN110828058A (en) * | 2019-11-14 | 2020-02-21 | 中国科学院合肥物质科学研究院 | High-current-carrying high-temperature superconducting composite conductor based on split stacking structure |
| CN111584150A (en) * | 2020-04-01 | 2020-08-25 | 北京交通大学 | CICC conductor |
| CN111613384A (en) * | 2020-05-21 | 2020-09-01 | 中国科学院合肥物质科学研究院 | CICC conductor of ReBCO high-temperature superconducting tape and manufacturing method thereof |
| CN111613384B (en) * | 2020-05-21 | 2022-02-11 | 中国科学院合肥物质科学研究院 | CICC conductor of ReBCO high-temperature superconducting tape and manufacturing method thereof |
| CN112820470A (en) * | 2021-01-05 | 2021-05-18 | 中国科学院合肥物质科学研究院 | MgB2CICC conductor structure and manufacturing method thereof |
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Address after: 230001 no.181 Gucheng Road, shiyangang Township, Hefei City, Anhui Province Patentee after: INSTITUTE OF PLASMA PHYSICS, CHINESE ACADEMY OF SCIENCES Address before: 230031 Shushan Lake Road, Shushan District, Anhui, China, No. 350, No. Patentee before: INSTITUTE OF PLASMA PHYSICS, CHINESE ACADEMY OF SCIENCES |