CN111613384B - CICC conductor of ReBCO high-temperature superconducting tape and manufacturing method thereof - Google Patents
CICC conductor of ReBCO high-temperature superconducting tape and manufacturing method thereof Download PDFInfo
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- 239000004020 conductor Substances 0.000 title claims abstract description 64
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 45
- 239000002184 metal Substances 0.000 claims abstract description 45
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 239000011241 protective layer Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000010410 layer Substances 0.000 claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 26
- 229910052802 copper Inorganic materials 0.000 claims description 24
- 239000010949 copper Substances 0.000 claims description 24
- 238000004804 winding Methods 0.000 claims description 21
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 239000011800 void material Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 2
- 230000004927 fusion Effects 0.000 description 4
- 229910000576 Laminated steel Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012938 design process Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000000641 cold extrusion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
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- 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
- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/01—Manufacture or treatment
- H10N60/0268—Manufacture or treatment of devices comprising copper oxide
- H10N60/0801—Manufacture or treatment of filaments or composite wires
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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 CICC conductor of ReBCO high-temperature superconducting tapes and a manufacturing method thereof, wherein the CICC conductor comprises an isotropic ReBCO superconducting cable, a cable protection layer and a metal sheath; the ReBCO superconducting cable is formed by twisting a plurality of groups of isotropic primary superconducting cables or a plurality of groups of secondary superconducting cables around a central cooling pipe; the central cooling pipe is of a circular section; a cable protective layer is wrapped outside the ReBCO superconducting cable; and a metal sheath is wrapped outside the cable protective layer. The primary cable and the secondary cable which are wound by the ReBCO superconducting strip also have isotropy, the protective layer is adopted on the outer layer of the cable, the ReBCO superconducting cable is prevented from being damaged in the manufacturing and assembling process of the conductor, the manufacturing process can adopt rolling deformation, and the method is simple and easy to realize. The invention provides a method for applying anisotropic ReBCO superconducting tape to a large high-field superconducting magnet, and the anisotropic ReBCO superconducting tape has high electrical property stability and excellent mechanical property.
Description
Technical Field
The invention relates to the technical field of superconducting conductors for large-scale high-field magnets, in particular to a design and manufacturing method of a CICC conductor of a ReBCO superconducting strip.
Background
The superconducting technology has important application in the fields of electricians, medical treatment, traffic, scientific experiments and the like, such as particle accelerators, nuclear fusion devices, magnetohydrodynamic power generationAnd the like, and the high magnetic field and the large current are remarkable characteristics. The magnetic confinement nuclear fusion device is required to generate a magnetic field with 10T magnitude in a space of tens of meters, and the next generation fusion reactors designed at home and abroad at present require that the highest fields of a central solenoid magnet and a longitudinal field magnet are higher than 12T (the CFETR central solenoid coil of a Chinese fusion experimental reactor requires about 17T of the highest field and about 60kA of current carrying). Also, for next generation particle accelerators, magnetic fields higher than 16T, even up to 18-20T, are required. Due to the high magnetic field, high current operating environment, the magnet is also required to have excellent mechanical properties to overcome the electromagnetic load during operation. Therefore, a cable conductor in a pipe (hereinafter referred to as a cic conductor) is widely used for a large superconducting magnet because of its advantages such as efficient cooling, high stability, and high mechanical strength. However, the cic c conductor applied to large high-field magnets up to now mainly uses Nb with upper critical fields of 20T and 11T in 4.2K environment3Sn, NbTi and other low-temperature superconducting wires, but the commercial application of Nb is realized at present due to the limitation of the wire structure, the production process and other conditions3The current-carrying performance of the Sn superconducting wire is obviously attenuated along with the increase of a magnetic field, and the Sn superconducting wire is limited in application to large magnets with the temperature of more than 12T. Therefore, the search for superconducting materials that still have high current carrying properties at high fields is a key factor in the development of large high field magnets.
According to the current development of the practical superconducting material, the ReBCO superconducting tape having a very high irreversible field and excellent magnetic field current-carrying characteristics under the environment of 4.2K is concerned, and the ReBCO superconducting tape still has current-carrying performance meeting application requirements under the environment of 4.2K and the magnetic field intensity higher than 20T. However, the tape structure is anisotropic, and thus the design and manufacturing process of the conductor structure of the low-temperature superconducting wire having isotropy cannot be used. Based on the problem, a CICC conductor design that ReBCO superconducting tapes are stacked into a square superconducting wire core, and a filling material and a round sleeve are added to form a strand is proposed, but the CICC conductor design has defects when being applied to a large magnet, and a part of tapes are subjected to a relatively extreme stress strain state in the magnet winding process, so that the current-carrying performance is degraded. Because ReBCO belongs to oxide ceramic materials, the ReBCO has certain stress strain sensitive characteristics. Therefore, the CICC conductor of the ReBCO superconducting strip needs to solve the problem of anisotropy of the strip and avoid the problem of current-carrying performance degradation caused by stress strain in the design and manufacturing process.
Disclosure of Invention
Aiming at the problem that the low-temperature superconducting CICC conductor cannot be designed and manufactured due to the anisotropy and stress-strain sensitivity of the ReBCO superconducting strip, the invention provides a CICC conductor based on the ReBCO superconducting strip and a manufacturing method thereof, so as to solve the problem that the anisotropy and stress-strain sensitivity of the ReBCO superconducting strip bring to the application of a large superconducting magnet. The ReBCO superconducting tape CICC conductor is of an isotropic round section or square section structure and mainly comprises a metal sheath, a superconducting cable formed by twisting a plurality of strands of ReBCO superconducting tapes spirally wound round-section superconducting strands, a cable protection layer and a central cooling pipe. The CICC conductor is formed by cold extrusion after the superconducting cable and the metal sheath are assembled in a clearance mode, the operation process is simple and convenient and easy to control, and a method is provided for applying the 77K-4.2K high-temperature superconducting ReBCO strip to a large-scale high-field magnet.
The invention provides a CICC conductor of a ReBCO high-temperature superconducting tape, which comprises an isotropic ReBCO superconducting cable, a cable protection layer and a metal sheath, wherein the cable protection layer is arranged on the CICC conductor;
the ReBCO superconducting cable is formed by twisting a plurality of groups of isotropic primary superconducting cables or a plurality of groups of secondary superconducting cables around a central cooling pipe; the central cooling pipe is of a circular section;
a cable protective layer is wrapped outside the ReBCO superconducting cable;
and a metal sheath is wrapped outside the cable protective layer.
Furthermore, the shape of the isotropic CICC conductor is a circular section or a square section.
Furthermore, the ReBCO superconducting cable is formed by twisting 6 groups of isotropic primary superconducting cables or secondary superconducting cables around a central cooling pipe;
furthermore, the primary superconducting cable is formed by spirally winding a plurality of 1-5mm wide ReBCO superconducting strips around a round copper wire or aluminum wire with the diameter of 1.5-7mm, and the outside of the wound ReBCO superconducting strips is protected mechanically and protected against quenching by adopting a patterned or overlapped electric metal strip.
Furthermore, the secondary superconducting cable is formed by mutually twisting three primary superconducting cables, and the metal strip is adopted to perform the pattern wrapping treatment on the outer side of the cable.
Furthermore, the central cooling pipe has a circular cross section, is composed of a stainless steel spiral pipe or a circular pipe with holes, and is used for circulating a cooling medium, so that the superconducting cable can operate in a required temperature environment.
Furthermore, the cable protective layer is formed by metal pipes or overlapped metal strips;
the metal sheath adopts a circular or square outside and round inside metal tube according to the specific operation environment requirement.
The invention also provides a manufacturing method of the ReBCO high-temperature superconducting tape CICC conductor, which comprises the following steps:
step 1: manufacturing a first-stage superconducting cable, specifically comprising: the method comprises the following steps of spirally winding ReBCO superconducting tapes with the width of 1-5mm around high-conductivity copper or aluminum wires with the diameter of 1.5-7mm, wherein the winding number of the single-layer ReBCO superconducting tapes is determined according to the width of the tapes and the diameter of the copper or aluminum wires, and the requirement that the circumference of the copper or aluminum is larger than the sum of the widths of the tapes is met; carrying out pattern wrapping or lap wrapping and winding by adopting a copper strip with the thickness of 0.05-0.5mm after the winding of the ReBCO superconducting strip is finished, wherein the pattern wrapping rate is controlled to be 30-70%, the lap wrapping rate is more than 30%, and the final thickness is controlled to be within 3 mm;
step 2: manufacturing a superconducting cable: twisting the superconducting cable according to the specific structural design of the superconducting cable, and selecting 6 primary superconducting cables and 1 central cooling pipe to be twisted or 6 secondary superconducting cables and 1 central cooling pipe to be twisted according to the specific conductor current-carrying requirement, wherein the tension in the twisting process is not more than 200N, and the twisting pitch Lp is more than 400 mm; the secondary superconducting cable is formed by twisting 3 primary superconducting cables, the winding pitch is controlled to be larger than 100mm, the twisting tension is not more than 100N, copper strips or stainless steel strips with the thickness of 0.01-0.5mm are adopted on the outer side to carry out pattern wrapping, the pattern wrapping rate is controlled to be 30% -70%, and the final thickness is controlled to be within 3 mm;
and step 3: manufacturing a superconducting cable protective layer: the superconducting cable protective layer selects a copper pipe or a stacked steel belt, if the copper pipe is selected, the assembly clearance is controlled to be 2-5mm, if the stacked steel belt is selected, the stacking rate is required to be more than 30%, and the thickness of the copper pipe or the stacked steel belt is controlled to be 0.5-5 mm;
and 4, step 4: connecting the metal sleeve: preparing a metal sleeve according to the length requirement of a specific CICC conductor, wherein the metal sleeve is a circular or externally and internally circular seamless stainless steel tube according to the specific structural design of the CICC conductor, and the metal sleeve is connected to the required length in an argon arc welding mode for the CICC conductor with the length requirement of more than 8 m;
and 5: assembling a conductor: penetrating the superconducting cable with the protective layer into a metal sheath, and selecting clearance assembly to control the tension not to exceed 70kN in the assembly process, wherein the clearance is controlled to be 1-5 mm;
step 6: conductor extrusion molding: calculating a required extrusion deformation amount according to the assembly clearance in the steps 3 and 5, so that the void ratio inside the conductor is more than 20% to ensure the cooling effect of the superconducting cable; subsequently, the rolling deformation is performed in such a manner that the single set deformation amount is less than 0.5%.
Furthermore, the cold deformation amount of the metal sheath is controlled within 8%, and for a conductor with a large length of more than 50m, the conductor is wound into a spiral shape, the layers are in close contact with each other, and the winding radius is not less than 2 m.
Has the advantages that: the invention provides a ReBCO superconducting tape CICC conductor, which is characterized in that a small-size superconducting cable wound by multiple ReBCO superconducting tapes is twisted, and a compressed metal protective layer and a jacket are additionally arranged on the outer part of the small-size superconducting cable, so that mechanical damage of the ReBCO superconducting tapes caused by electromagnetic motion under high current and high field is reduced or avoided.
Drawings
FIG. 1 is a schematic diagram of a three-dimensional structure of an isotropic CICC conductor of a ReBCO high-temperature superconducting tape;
FIG. 2 is a schematic cross-sectional view of a circular-section isotropic CICC conductor of a ReBCO high-temperature superconducting tape;
FIG. 3 is a schematic cross-sectional view of a square cross-sectional isotropic CICC conductor of a ReBCO high-temperature superconducting tape;
FIG. 4 is a schematic cross-sectional view of an isotropic primary cable of ReBCO high-temperature superconducting tape;
FIG. 5 is a schematic cross-sectional view of a ReBCO high temperature superconducting tape isotropic secondary cable;
FIG. 6 is a schematic view of a coil-structured central cooling tube structure;
FIG. 7 is a schematic view of a perforated circular tube-shaped central cooling tube structure;
FIG. 8 is a schematic view of cold press molding of a CICC conductor of a ReBCO high-temperature superconducting tape.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person skilled in the art based on the embodiments of the present invention belong to the protection scope of the present invention without creative efforts.
According to an embodiment of the invention, a ReBCO high temperature superconducting tape cic conductor is provided, which comprises an isotropic ReBCO superconducting cable, a cable protection layer and a metal sheath; the ReBCO superconducting cable is formed by twisting a plurality of groups of isotropic primary superconducting cables or a plurality of groups of secondary superconducting cables around a central cooling pipe; the central cooling pipe is of a circular section; a cable protective layer is wrapped outside the ReBCO superconducting cable; and a metal sheath is wrapped outside the cable protective layer.
As shown in fig. 1, a ReBCO high-temperature superconducting tape cic conductor comprises a superconducting cable 1, a cable protection layer 2 and a metal sheath 3;
as shown in fig. 2 and 3, wherein the ReBCO superconducting cable 1 may be a primary superconducting cable 4 or a secondary superconducting cable 5, the metal sheath 3 may be a circular or outside-inside circular stainless steel pipe;
as shown in fig. 4, the cross-sectional structure of the primary superconducting cable 4 is formed by spirally winding a ReBCO superconducting tape 9 around a circular high-conductivity metal core 10 and then externally wrapping or lapping the high-conductivity metal tape 7 by pattern;
the two-stage ReBCO superconducting cable 5 is composed of 3 primary superconducting cables 4 as shown in fig. 5.
As shown in fig. 6 to 7, the central cooling pipe has a circular cross section, and is formed of a spiral stainless steel pipe or a circular pipe with holes, and is used for circulating a cooling medium, so that the superconducting cable can be operated in a desired temperature environment.
According to an embodiment of the invention, a method for manufacturing a ReBCO high-temperature superconducting tape CICC conductor is provided, which specifically comprises the following steps:
step 1: the manufacturing of the primary superconducting cable 4 specifically comprises: the method is characterized in that ReBCO superconducting tapes with the width of 1-5mm are spirally wound around high-conductivity copper or aluminum wires with the diameter of 1.5-7mm, the winding number of the single-layer ReBCO superconducting tapes is determined according to the width of the tapes and the diameter of the copper or aluminum wires, and the requirement that the circumference of the copper or aluminum is larger than the sum of the widths of the tapes is met. After the winding of the ReBCO superconducting strip is finished, carrying out patterned wrapping or overlapped winding by adopting a copper strip with the thickness of 0.05-0.5mm, wherein the patterned wrapping rate is generally controlled to be 30-70%, the overlapped wrapping rate is generally greater than 30%, and the final thickness is generally controlled to be within 3 mm;
step 2: manufacturing the superconducting cable 1: twisting the superconducting cable according to the specific structural design of the superconducting cable, wherein the superconducting cable can be twisted by 6 primary superconducting cables 4 and 1 central cooling pipe 6 or twisted by 6 secondary superconducting cables 5 and 1 central cooling pipe 6 according to the specific conductor current-carrying requirement, the tension in the twisting process is not more than 200N, and the twisting pitch Lp is more than 400 mm; in addition, the second-level superconducting cable 5 is formed by twisting 3 first-level superconducting cables 4, the winding pitch is controlled to be larger than 100mm, the twisting tension is not more than 100N, the outer side of the second-level superconducting cable is wrapped by a copper strip or a stainless steel strip with the thickness of 0.01-0.5mm, the wrapping rate is generally controlled to be 30% -70%, and the final thickness is generally controlled to be within 3 mm;
and step 3: manufacturing the superconducting cable protective layer 2: according to the specific structure design, the superconducting cable protective layer 2 can select a high-plasticity copper pipe or a laminated steel belt, if the copper pipe is selected, the assembly clearance is generally required to be controlled to be 2-5mm, if the laminated steel belt is selected, the laminating rate is generally required to be more than 30%, and the thickness of the copper pipe or the laminated steel belt is generally controlled to be 0.5-5 mm;
and 4, step 4: connecting the metal sleeve: preparing a metal sleeve according to the length requirement of a specific CICC conductor, wherein the metal sleeve is a circular or externally and internally circular seamless stainless steel tube according to the specific structural design of the CICC conductor, and the metal sleeve is connected to the required length in an argon arc welding mode for the CICC conductor with the length requirement of more than 8 m;
and 5: assembling a conductor: penetrating a superconducting cable 1 with a protective layer 2 into a metal sheath 3, and generally selecting clearance assembling for controlling the tension force in the assembling process not to exceed 70kN, wherein the clearance is generally controlled to be 1-5 mm;
step 6: conductor extrusion molding: calculating a required extrusion deformation amount according to the assembly clearance in the steps 3 and 5, so that the void ratio inside the conductor is more than 20% to ensure the cooling effect of the superconducting cable; subsequently, as shown in FIG. 8 for roll deformation, the number of specific sets of wheels can be selected based on the calculated crush deformation such that a single set of deformation is less than 0.5%. The cold deformation of the metal sheath is controlled within 8%, and for a conductor with a large length of more than 50m, the conductor is wound into a spiral shape, the layers are in close contact with each other, and the winding radius is not less than 2 m.
Although illustrative embodiments of the present invention have been described above to facilitate the understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, but various changes may be apparent to those skilled in the art, and it is intended that all inventive concepts utilizing the inventive concepts set forth herein be protected without departing from the spirit and scope of the present invention as defined and limited by the appended claims.
Claims (5)
1. A kind of ReBCO high temperature superconduction strip CICC conductor, characterized by that:
the CICC conductor comprises an isotropic ReBCO superconducting cable, a cable protection layer and a metal sheath;
the ReBCO superconducting cable is formed by twisting a plurality of groups of secondary superconducting cables around a central cooling pipe; the secondary superconducting cable is formed by mutually twisting three primary superconducting cables, a metal strip is adopted to carry out pattern wrapping treatment on the outer side of each cable, the primary superconducting cable is formed by spirally winding a plurality of 1-5mm wide ReBCO superconducting strips around a round copper wire or aluminum wire with the diameter of 1.5-7mm, and the outer side of the wound ReBCO superconducting strips is subjected to mechanical protection and quench protection by adopting a pattern wrapped or overlapped electric metal strip;
the central cooling pipe is of a circular section; the superconducting cable consists of a circular pipe with a hole or a spiral pipe with a gap and is used for circulating a cooling medium, so that the superconducting cable can operate in a required temperature environment;
a cable protective layer is wrapped outside the ReBCO superconducting cable; the cable protective layer is formed by metal pipes or overlapped metal strips; and a metal sheath is wrapped outside the cable protective layer, and the metal sheath adopts an outer square and inner circle or a circular metal pipe according to the specific operation environment requirement.
2. The ReBCO high-temperature superconducting tape CICC conductor of claim 1, wherein the isotropic CICC conductor is circular or square in shape.
3. The ReBCO high temperature superconducting tape cic conductor of claim 1, wherein the ReBCO superconducting cable is formed by twisting 6 sets of isotropic secondary superconducting cables around a central cooling tube.
4. A method for manufacturing a ReBCO high temperature superconducting tape cic conductor according to any one of claims 1 to 3, which comprises the following steps:
step 1: manufacturing a first-stage superconducting cable, specifically comprising: the method comprises the following steps of spirally winding ReBCO superconducting tapes with the width of 1-5mm around high-conductivity copper or aluminum wires with the diameter of 1.5-7mm, wherein the winding number of the single-layer ReBCO superconducting tapes is determined according to the width of the tapes and the diameter of the copper or aluminum wires, and the requirement that the circumference of the copper or aluminum is larger than the sum of the widths of the tapes is met; carrying out pattern wrapping or lap wrapping and winding by adopting a copper strip with the thickness of 0.05-0.5mm after the winding of the ReBCO superconducting strip is finished, wherein the pattern wrapping rate is controlled to be 30-70%, the lap wrapping rate is more than 30%, and the final thickness is controlled to be within 3 mm;
step 2: manufacturing a superconducting cable: twisting the superconducting cable according to the specific structural design of the superconducting cable, and according to the specific conductor current-carrying requirement, selecting 6 secondary superconducting cables and 1 central cooling pipe to be twisted, wherein the tension in the twisting process is not more than 200N, and the twisting pitch Lp is more than 400 mm; the secondary superconducting cable is formed by twisting 3 primary superconducting cables, the winding pitch is controlled to be larger than 100mm, the twisting tension is not more than 100N, copper strips or stainless steel strips with the thickness of 0.01-0.5mm are adopted on the outer side to carry out pattern wrapping, the pattern wrapping rate is controlled to be 30% -70%, and the final thickness is controlled to be within 3 mm;
and step 3: manufacturing a superconducting cable protective layer: the superconducting cable protective layer selects a copper pipe or a stacked steel belt, if the copper pipe is selected, the assembly clearance is controlled to be 2-5mm, if the stacked steel belt is selected, the stacking rate is required to be more than 30%, and the thickness of the copper pipe or the stacked steel belt is controlled to be 0.5-5 mm;
and 4, step 4: connecting the metal sleeve: preparing a metal sleeve according to the length requirement of a specific CICC conductor, wherein the metal sleeve is a circular or externally and internally circular seamless stainless steel tube according to the specific structural design of the CICC conductor, and the metal sleeve is connected to the required length in an argon arc welding mode for the CICC conductor with the length requirement of more than 8 m;
and 5: assembling a conductor: penetrating the superconducting cable with the protective layer into a metal sheath, and selecting clearance assembly to control the tension not to exceed 70kN in the assembly process, wherein the clearance is controlled to be 1-5 mm;
step 6: conductor extrusion molding: calculating a required extrusion deformation amount according to the assembly clearance in the steps 3 and 5, so that the void ratio inside the conductor is more than 20% to ensure the cooling effect of the superconducting cable; subsequently, the rolling deformation is performed in such a manner that the single set deformation amount is less than 0.5%.
5. The manufacturing method of the ReBCO high-temperature superconducting tape CICC conductor according to claim 4, characterized in that:
the cold deformation of the metal sheath is controlled within 8%, and for a conductor with a large length of more than 50m, the conductor is wound into a spiral shape, the layers are in close contact with each other, and the winding radius is not less than 2 m.
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| CN112562914A (en) * | 2020-09-14 | 2021-03-26 | 核工业西南物理研究院 | Method for preparing round wire of REBCO stacked conductor and rolling die |
| CN112908554B (en) * | 2021-01-20 | 2023-12-01 | 中国科学院合肥物质科学研究院 | Small bending radius low-loss flexible support superconducting cable for superconducting magnet |
| CN113077934B (en) * | 2021-03-31 | 2022-06-28 | 上海超导科技股份有限公司 | Compact superconducting cable supporting structure, preparation method and superconducting cable |
| CN115331883B (en) * | 2022-07-15 | 2023-12-08 | 中国科学院合肥物质科学研究院 | Superconducting cable |
| CN115458228A (en) * | 2022-09-07 | 2022-12-09 | 中国科学院合肥物质科学研究院 | Coaxial lap joint type superconducting joint based on CICC conductor and preparation method |
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| CN108320858B (en) * | 2018-03-07 | 2020-05-22 | 北京原力辰超导技术有限公司 | High-temperature superconducting current-sharing cable and method for realizing current sharing |
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