CN110444989B - High-temperature superconducting cable and joint connecting method thereof - Google Patents

High-temperature superconducting cable and joint connecting method thereof Download PDF

Info

Publication number
CN110444989B
CN110444989B CN201910807890.XA CN201910807890A CN110444989B CN 110444989 B CN110444989 B CN 110444989B CN 201910807890 A CN201910807890 A CN 201910807890A CN 110444989 B CN110444989 B CN 110444989B
Authority
CN
China
Prior art keywords
strip
temperature superconducting
layer long
cable
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910807890.XA
Other languages
Chinese (zh)
Other versions
CN110444989A (en
Inventor
宁飞鹏
朱自安
赵玲
赵跃
朱佳敏
赵裕
周俊杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI SUPERCONDUCTOR TECHNOLOGY CO LTD
Wuxi Toly Electric Works Co ltd
Institute of High Energy Physics of CAS
Original Assignee
SHANGHAI SUPERCONDUCTOR TECHNOLOGY CO LTD
Wuxi Toly Electric Works Co ltd
Institute of High Energy Physics of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANGHAI SUPERCONDUCTOR TECHNOLOGY CO LTD, Wuxi Toly Electric Works Co ltd, Institute of High Energy Physics of CAS filed Critical SHANGHAI SUPERCONDUCTOR TECHNOLOGY CO LTD
Priority to CN201910807890.XA priority Critical patent/CN110444989B/en
Publication of CN110444989A publication Critical patent/CN110444989A/en
Application granted granted Critical
Publication of CN110444989B publication Critical patent/CN110444989B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H01R4/021—Soldered or welded connections between two or more cables or wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/68—Connections to or between superconductive connectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Abstract

The invention relates to a high-temperature superconducting cable and a joint connecting method thereof, belongs to the technical field of high-temperature superconducting materials, and solves the problems of large volume, large resistance, slow heat conduction, large processing difficulty and poor joint stability of the conventional high-temperature superconducting cable joint. The joint connecting method comprises the following steps: the method comprises the following steps: sequentially stacking and welding a plurality of high-temperature superconducting strips end to form a single-layer long strip; step two: stacking a plurality of single-layer long strips, wherein welding points of two adjacent single-layer long strips are arranged at intervals in the horizontal direction; step three: and binding the stacked single-layer long strips into the high-temperature superconducting stack by using a binding piece. Also provided is a high temperature superconducting cable based on the joint connection method. The joint connecting method has the advantages of simple manufacturing process and easy processing, and the cable joint manufactured by the joint connecting method has the advantages of small volume, small resistance, quick heat conduction and wide application prospect.

Description

High-temperature superconducting cable and joint connecting method thereof
Technical Field
The invention relates to the technical field of high-temperature superconducting materials, in particular to a high-temperature superconducting cable and a joint connecting method thereof.
Background
High-temperature superconductivity is a trend of superconductivity development, the performance of the second-generation high-temperature superconducting tape is not inferior to that of a low-temperature superconducting niobium-titanium wire at present, but a plurality of factors restrict the large-scale application of the high-temperature superconducting tape at present. For example, the flat band has anisotropy, cannot be processed into a rutherford cable, does not have a mature cable processing technology, is high in price and the like, so that the current high-temperature superconducting is only applied to a small laboratory magnet and an inserted magnet, and the application of a large high-temperature superconducting magnet is not available.
Some research institutions at home and abroad are always developing high-temperature superconducting cables, and a mature cable winding mode of a second-generation high-temperature superconducting tape ReBCO (rare earth barium copper oxide) which can be used in batches does not exist up to now. For example, a TSTC (Twisted-Tape Cable) high temperature superconducting ReBCO Cable developed by mit (massachusetts Institute of technology) puts different numbers of layers of ReBCO tapes on two copper sheets, and bundles them with stainless steel wires, and then twists, but such a high temperature superconducting Cable is suitable for winding a compact small-sized magnet, and cannot be applied to a large-sized magnet. MIT has still developed single channel cable and three-channel cable based on TSTC's high temperature superconducting cable, but needs to open a slot on the bar copper in succession, and precision and length are very difficult to grasp, still need to imbed TSTC cable into, and not only the cost is very high, difficult control, also difficult realization long cable conductor's processing. CORC (Conductor on round core) cables developed by ACT (advanced Conductor Technologies LLC) have very poor cable-to-tape length ratios, such as CORC cables requiring 100 meters, requiring a single high temperature superconducting tape nearly 200 meters in length, and the production of single REBCO tapes at the present stage has limited length, substantially on the order of hundreds of meters, and the larger the length, the higher the cost, and the relatively lower the engineering current density. RACC (Roebel Assembled Coated conductor) cables developed by General cableBeverconductors Ltd are high in cost and anisotropic in high-temperature superconducting tapes.
The high-temperature superconducting cable joint is an inevitable problem in the cable development process, because the single length of the high-temperature superconducting tape is limited at present, the superconducting tapes produced in batches by manufacturers are basically hundreds of meters in magnitude, if the cable is processed firstly, only the tapes with the same length can be used, and the tapes are basically hundreds of meters in length, so that the tapes produced by the manufacturers have a lot of waste materials, are short and unusable, need to be cut off when being long, and one joint needs to be processed every hundreds of meters of the cable, and the size of the joint is far larger than that of the cable, so that the cable is not uniform, and coils are difficult to wind. Therefore, the difficult problem of cable joints needs to be solved when the superconducting cable is manufactured, at present, the superconducting cable joints at home and abroad have various forms, but in any form, the size of the joint is larger, even larger than that of the original cable, the processing technology is complex, the processing difficulty is high, the stability of the joint is not high, if a large superconducting coil is manufactured, when hundreds of superconducting joints are faced, the coil winding is difficult, and the workload is very huge. Therefore, it is urgently needed to develop a cable joint connection method with simple process, small resistance, fast heat conduction and small volume.
Disclosure of Invention
In view of the above analysis, the present invention aims to provide a high temperature superconducting cable and a joint connection method thereof, so as to solve the problems of large volume, large resistance, slow heat conduction, large processing difficulty and poor joint stability of the conventional high temperature superconducting cable joint.
The purpose of the invention is mainly realized by the following technical scheme:
in one aspect, a method for connecting a high temperature superconducting cable joint is provided, which includes the steps of:
the method comprises the following steps: sequentially stacking and welding a plurality of high-temperature superconducting strips end to form a single-layer long strip;
step two: stacking a plurality of single-layer long strips, wherein welding points of two adjacent single-layer long strips are arranged at intervals in the horizontal direction;
step three: and binding the stacked single-layer long strips into the high-temperature superconducting stack by using a binding piece.
Further, the method also comprises the fourth step of: and coating aluminum on the surface of the high-temperature superconducting stack.
Further, in the first step, the arrangement mode of the belt materials in the single-layer long belt material is as follows: the first and last strips are removed, with the end welds of each strip in the middle being on either side of the strip, or alternatively, the end welds of each strip in the middle being on the same side of the strip.
Further, in the second step, the transverse distance between the m-th welding points of the two adjacent single-layer long strips is D2And m is an integer of 1 or more.
Further, the first welding point of the top single-layer long strip is taken as a reference and is stacked from top to bottom, and the transverse distance between the first welding point of the nth single-layer long strip and the first welding point of the top single-layer long strip is (n-1) multiplied by D2Wherein n is an integer greater than or equal to 2; the length of the first strip of the single-layer long strip is greater than that of the welding point and less than or equal to the factory length of the single strip.
On the other hand, the high-temperature superconducting cable based on the joint connecting method comprises a high-temperature superconducting stack, wherein the high-temperature superconducting stack is formed by stacking a plurality of single-layer long strips; the single-layer long strip is formed by sequentially stacking and welding a plurality of high-temperature superconducting strips end to end, and welding points of two adjacent layers of single-layer long strips are arranged at intervals in the horizontal direction.
The device further comprises a binding piece, wherein the binding piece is used for binding the stacked single-layer long strips into the high-temperature superconducting stack; the surface of the high-temperature superconducting stack is provided with an aluminum coating.
Further, the transverse distance between the m-th welding points of two adjacent single-layer long strips is D2M is an integer of 1 or more; stacking the top single-layer long strip from top to bottom by taking the first welding point of the top single-layer long strip as a reference, wherein the transverse distance between the first welding point of the nth single-layer long strip and the first welding point of the top single-layer long strip is (n-1) multiplied by D2Wherein n is an integer greater than or equal to 2; the length of the first strip of the single-layer long strip is greater than that of the welding point and less than or equal to the factory length of the single strip.
Furthermore, the upper surface and the lower surface of the high-temperature superconducting stack are respectively provided with a layer of aluminum gasket.
Further, the binding piece is an aluminum wire or an aluminum sheet.
Compared with the prior art, the invention has at least one of the following beneficial effects:
a) the invention provides a high-temperature superconducting cable joint connecting method, which comprises the steps of firstly, sequentially stacking and welding a plurality of high-temperature superconducting strips end to form a single-layer long strip; stacking a plurality of single-layer long strips, wherein welding points of two adjacent layers of single-layer long strips are arranged at intervals in the horizontal direction; the method changes the large joint of a single cable into the joint of a single strip and uniformly distributes the joint in the cable, the cable joint manufactured by the joint connecting method changes the size of the cable to a small extent, solves the problems of more cable joints, complex process, high processing difficulty, difficult coil winding and the like, can realize the processing of the cable with any length, and the joint mode is suitable for all the current high-temperature superconducting cables and has wide application prospect.
b) The high-temperature superconducting cable joint connecting method provided by the invention has small requirement on the length of the high-temperature superconducting tape, solves the problems of limited and uneven length of the high-temperature superconducting tape produced by the current manufacturer, and reduces the production cost of the high-temperature superconducting tape manufacturer.
c) According to the high-temperature superconducting cable provided by the invention, the high-temperature superconducting stack is formed by stacking a plurality of single-layer long strips; the long strip of individual layer is formed by many high temperature superconducting strips and stacks the welding end to end in proper order, and the welding point of the long strip of adjacent two-layer individual layer sets up at the interval on the horizontal direction, and this structural design changes the big joint of single cable into the joint and the evenly distributed of single strip in the cable, and the cable size is even, does not have local increase, has reduced the joint volume greatly, and the joint structure is simple moreover, easy processing, and work load is little, and the strip is not extravagant, and the strip of how long can both be used, reduce cost. In addition, because the joint is small, the cable generates heat more evenly to can adjust welding length as required, and then adjust and connect resistance, have extensive application prospect.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic view of a cable connector according to an embodiment of the present invention;
FIG. 2 is a schematic view of a long cable joint according to an embodiment of the present invention;
FIG. 3 is a schematic view of a multi-layer cable joint according to an embodiment of the present invention;
FIG. 4 is a schematic view of a high temperature superconducting stack bundled with aluminum wires in an embodiment of the present invention;
FIG. 5 is a schematic view of a high temperature superconducting stack bundled with aluminum sheets in an embodiment of the invention;
FIG. 6 is a schematic structural view of an aluminum-clad component in an embodiment of the present invention;
FIG. 7 is a schematic diagram of an extrusion head in an aluminum-clad component in accordance with an embodiment of the present invention;
FIG. 8 is a schematic diagram of a square cable structure according to an embodiment of the present invention;
fig. 9 is a schematic view of a circular cable structure according to an embodiment of the present invention.
Reference numerals:
1-an aluminum gasket; 2-high temperature superconducting stack; 201-high temperature superconducting tape; 3-binding piece; 4-extrusion head; 5-aluminum bar material; 6-outlet terminal; 7-a lead-out opening.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Example one
Because the lengths of the high-temperature superconducting tapes produced by high-temperature superconducting tape manufacturers are different from several meters to hundreds of meters, the longest length in batch production is basically more than one hundred meters. If the cable is processed firstly, only the belt materials with the same length can be used, and the belt materials are basically more than one hundred meters in length, so that the belt materials produced by manufacturers have a lot of waste materials, are short and cannot be used, and need to be cut off when the belt materials are long, and a connector needs to be processed every one hundred meters of the cable, and the size of the connector is far larger than that of the cable, so that the cable is uneven, and the coil is difficult to wind. The embodiment provides a new high temperature superconducting cable joint method, which changes the large joint of the traditional cable into the joint of a single strip and distributes the joint evenly in the cable, and the high temperature superconducting cable joint connecting method comprises the following steps:
the method comprises the following steps: and a plurality of high-temperature superconducting strips 201 are sequentially stacked end to end and welded into a single-layer long strip.
Manufacturing N layers of single-layer long strips according to design requirements, wherein M high-temperature superconducting strips 201 (strips 201 for short) are required to be welded on each single-layer long strip, as shown in figures 1 to 3, and are sequentially named L1，L2，L3，L4，…Ln…LNN is more than or equal to 2, and the welding points of each single-layer long strip are sequentially named as K1，K2，K3，…Km…，KMM is more than or equal to 2, and the length D of the welding is determined based on the performance requirement on the cable resistance1Length D of welding1I.e. the overlapping length of two adjacent high temperature superconducting tapes 201. In practice, the welding length D is determined according to the limit of the required joint resistance1Of a value or range of values, preferably, D1Is a value or range of values from 5cm to 20 cm.
In this embodiment, the arrangement of the tapes in the single-layer long tape includes two types: the first mode is that a first strip and a last strip are removed, and two end welding points of each strip in the middle of a single-layer long strip are positioned on two sides of the strip; in a second way, the first and the last strip are removed, the two end welds of the middle strip of the single-layer long strip being located on the same side of the strip, as shown in figures 2 to 3. Considering that the high-temperature superconducting tapes have front and back sides, namely the front side with the YBCO, and the front sides of the two welded tapes face to the front side, namely the YBCO side of one tape is opposite to the YBCO side of the other tape for welding, the welding mode can reduce the welding resistance.
Step two: and stacking a plurality of single-layer long strips, wherein welding points of two adjacent single-layer long strips are arranged at intervals in the horizontal direction.
And C, vertically superposing the single-layer long strips in the step I, and dispersing the welding points of the single-layer long strips in different layers in the cable during superposition, namely arranging the m-th welding points of two adjacent single-layer long strips at intervals in the vertical direction, wherein the vertical projections of the m-th welding points are not overlapped, and changing the large joint of the traditional cable into the joint of the single-layer long strips and uniformly distributing the joint in the cable. Preferably, the transverse distance between the m-th welding points of two adjacent single-layer long strips is D2Wherein m is an integer of 1 or more. Preferably, D2Greater than 1 m. It should be noted that the transverse distance between the m-th welding points of two adjacent single-layer long strips can be the same or different, and only the transverse distance between the two welding points is greater than 1m, so that the connector connecting method provided by the invention has no strict requirement on the length of the strip, the strip waste in the cable manufacturing process is greatly reduced, the short strip or the long strip does not need to be cut off, the short strip or the long strip can be reasonably utilized, and the cost can be obviously reduced.
In order to further reduce the volume of the joint, the mode of stacking a plurality of single-layer long strips vertically is optimized, the single-layer long strips are stacked from top to bottom by taking the first welding point of the top single-layer long strip as a reference, and the transverse distance from the first welding point of the nth single-layer long strip to the first welding point of the top single-layer long strip is (n-1) multiplied by D2Wherein n is an integer greater than or equal to 2, and the length of the first strip of the top single-layer long strip is greater than the length D of the welding point1. When n is 1, there is only one single-layer long strip without stacking, and the splice connection method of this embodiment is used for single-layer long strips having more than one layerConnecting with 2-layer cable. The length of the first strip of the single-layer long strips is less than or equal to the maximum length of the single strip due to the limitation of the factory length of the single strip, when the length of the first strip of a certain single-layer long strip calculated according to increasing calculation is greater than the maximum length of the single strip, the first round of stacking is completed, the first strip is arranged from the beginning, the joint arrangement structures of a plurality of single-layer long strips are shown in figure 3, the L < th > isn-1The length of the first strip of the long strip with single layer is D3And the maximum length of a single strip is D3Therefore, starting from the LN layer, a second round of stacking is performed according to the first round of stacking, and so on, until the number of layers of the stacked single-layer long strip satisfies the design requirements. Alternatively, after the first round of stacking, the first strip of the single-layer long strip is fed with D2When the length of the first strip of a single-layer long strip is less than or equal to the welding length D1In the process, a second round of stacking is performed, followed by a first strip of long strips of a single layer each according to D2The length of the single-layer long strip material is gradually increased, namely, the third round of stacking is carried out according to the first round of stacking operation, and the process is sequentially circulated until the number of layers of the stacked single-layer long strip material meets the design requirement. Taking a single ribbon length of 120 meters for example, a 1200 meter long cable would require approximately 10 ribbons to be welded together and a 5-layer cable would require approximately 50 ribbons.
In a preferred embodiment of the present invention, the high temperature superconducting tapes 201 having the same length are used for manufacturing the high temperature superconducting stack 2, and the length of the high temperature superconducting tape 201 is preferably 120m ± 0.5 m. The single-layer long strips made of strips with the same length have the same structure, the positions of welding points are also the same, when the single-layer long strips are stacked, two adjacent layers of welding points with the same sequence number are stacked in a staggered mode, and after the stacking is completed, the single-layer long strips are cut according to the strips with the shortest two ends of the high-temperature superconducting stack 2.
In another preferred embodiment, the high temperature superconducting tapes 201 with different lengths are used for manufacturing the high temperature superconducting stack 2, specifically, the first tape and the last tape have different lengths. Specifically, the lengths of the first strip and the last strip are preset according to design requirements of the cable length, the resistance and the like, and the middle strips are the same in length. Illustratively, for each round of stacked single-layer long strips, the length of the first strip of the single-layer long strips is gradually increased from top to bottom, and the length of the last strip of the single-layer long strips is gradually decreased from top to bottom, or the length of the first strip of the single-layer long strips is gradually decreased from top to bottom, and the length of the last strip of the single-layer long strips is gradually increased from top to bottom.
It should be noted that, in the method for connecting a superconducting cable joint according to this embodiment, the length of the single tape used is not particularly limited, and tapes of the same length or tapes of different lengths may be used. In one preferred mode, the high-temperature superconducting tapes 201 with different lengths are adopted, the tapes with different lengths are numbered before being welded into the single-layer long tape, the length data of each high-temperature superconducting tape 201 is recorded, and when the single-layer long tapes are stacked to manufacture a superconducting stack, the welding points of the two adjacent single-layer long tapes are not overlapped, so that the length of the high-temperature superconducting tapes is not strictly required, the problems that the high-temperature superconducting tapes produced by the current manufacturer are limited in length and uneven in length are solved, the utilization rate of the tapes is improved, and the production cost of the high-temperature superconducting tape manufacturer is reduced.
Step three: the stacked single-layer long strips are bundled into the high-temperature superconducting stack 2 by using the bundling piece 3.
And (3) binding the plurality of single-layer long strip material layers manufactured in the step two by using a binding piece 3 to manufacture the high-temperature superconducting stack 2, wherein the binding piece 3 is preferably an aluminum wire or an aluminum sheet.
In order to improve the performance of the high-temperature superconducting cable, before the high-temperature superconducting cable is wound and bound by the binding piece 3, a layer of aluminum gasket 1 is respectively added on the upper surface and the lower surface of the high-temperature superconducting stack 2, the width of the aluminum gasket 1 is the same as that of the high-temperature superconducting stack 2, as shown in fig. 4 to 5, a plurality of single-layer long strip laminations for placing the aluminum gasket 1 are wound by aluminum wires or aluminum sheets to form the high-temperature superconducting stack 2, and the aluminum gaskets 1 are respectively added on the upper surface and the lower surface of the high-temperature superconducting stack 2 to protect the high-temperature superconducting strips and reduce the adverse effects on the high-temperature superconducting cable structure caused by factors such as stretching, extrusion, high temperature and the like in the production process of manufacturing.
Step four: the surface of the high-temperature superconducting stack 2 is coated with aluminum.
In this embodiment, aluminum is used as the stabilizer, and compared with metals such as copper, aluminum has a low melting point, high electrical conductivity, and high thermal conductivity, and the use of aluminum as the stabilizer has the following advantages: (1) when the superconducting tape is quenched or subjected to overcurrent, the aluminum can be used as a conductor for conducting electricity, so that the superconducting tape is protected from being burnt, the working stability of the high-temperature superconducting cable is ensured, and the service life is prolonged; (2) when the large-scale magnet is wound, the aluminum can be used as a supporting structure, and the high-temperature superconducting cable can bear most of electromagnetic stress and cold contraction stress under the action of the aluminum supporting structure, so that the working stability of the high-temperature superconducting cable is improved.
The aluminum coating process in the step is carried out by using an aluminum coating machine, and the method comprises the following steps: feeding the high-temperature superconducting stack 2 into an aluminum cladding machine; the aluminum clad component extrudes and heats the aluminum bar 5 to about 450 degrees by a friction heating mode to soften the aluminum, and then extrudes the softened aluminum onto the high-temperature superconducting stack 2, wherein the structural schematic diagram of the aluminum clad component is shown in fig. 6. The structure of the extrusion head 4 of the aluminum cladding machine is shown in fig. 7, the extrusion head 4 is provided with a lead-out port 7 with the same cross section as that of the high-temperature superconducting stack 2, softened aluminum enters a space between the outer wall of the extrusion head 4 and the wire outlet end 6, and the aluminum is clad on the surface of the high-temperature superconducting stack 2 in the process that the high-temperature superconducting stack 2 is led out from the wire outlet end 6 through the lead-out port 7. Because the aluminum ratio is relatively soft, in order to form as quickly as possible, the outlet end 6 is provided with a cooling device, preferably in a water cooling mode. The final shaped cable shape includes, but is not limited to, a rectangular cable as shown in fig. 8 and a circular cable as shown in fig. 9 for different magnets.
Compared with the prior art, the high-temperature superconducting cable joint connection method provided by the embodiment includes the steps that a plurality of high-temperature superconducting strips 201 are sequentially stacked end to end and welded into a single-layer long strip; the long strip is made into a high-temperature superconducting stack 2, welding points of two adjacent single-layer long strips are arranged at intervals in the horizontal direction, large joints of the traditional cable are changed into joints of the single-layer long strips and are uniformly distributed in the cable, the joints made by the method are small in size, the size of the cable is changed little, the joints are simple in structure, easy to process and small in workload, and the problems that the number of cable joints is large, the process is complex, the processing difficulty is large, coils are difficult to wind and the like are solved. In addition, the method has low requirement on the length of the high-temperature superconducting tape 201, solves the problems of limited length and non-uniform length of the high-temperature superconducting tape 201 produced by the current manufacturer, reduces the production cost of the high-temperature superconducting tape manufacturer, and has wide application prospect.
Example two
In one embodiment of the present invention, there is disclosed a high temperature superconducting cable connected based on the cable joint connection method in the first embodiment, the high temperature superconducting cable including: the high-temperature superconducting stack 2 is formed by stacking a plurality of single-layer long strips; the single-layer long strip is formed by sequentially stacking and welding a plurality of high-temperature superconducting strips 201 end to end, and welding points of two adjacent layers of single-layer long strips are arranged at intervals in the horizontal direction; the device also comprises a binding piece 3, and the binding piece 3 binds a plurality of single-layer long strips which are stacked into the high-temperature superconducting stack 2.
In order to improve the performance of the high-temperature superconducting cable, the upper surface and the lower surface of the high-temperature superconducting stack 2 are respectively provided with a layer of aluminum gasket 1, and the aluminum gasket 1 and the superconducting stack are wound and bound by a binding piece 3, preferably, the binding piece 3 is an aluminum wire or an aluminum sheet. The upper and lower surfaces of the high-temperature superconducting stack 2 are respectively provided with an aluminum gasket 1, and the width of the aluminum gasket 1 is the same as that of the high-temperature superconducting stack 2, as shown in fig. 4 to 5. The aluminum gaskets 1 are respectively added on the upper surface and the lower surface of the high-temperature superconducting stack 2, so that the high-temperature superconducting tape can be protected, and the adverse effects of factors such as stretching, extrusion, high temperature and the like on the high-temperature superconducting cable structure in the production process of manufacturing the superconducting stack and the high-temperature superconducting cable are reduced.
In order to improve the performance of the high-temperature superconducting cable, the surface of the high-temperature superconducting stack 2 is provided with an aluminum-coated layer, aluminum is used as a stabilizer, compared with metals such as copper, the aluminum has the advantages of low melting point, high electric conductivity and high thermal conductivity, and the aluminum is used as the stabilizer: (1) when the superconducting tape is quenched or subjected to overcurrent, the aluminum can be used as a conductor for conducting electricity, so that the superconducting tape is protected from being burnt, the working stability of the high-temperature superconducting cable is ensured, and the service life is prolonged; (2) when the large-scale magnet is wound, the aluminum can be used as a supporting structure, and the high-temperature superconducting cable can bear most of electromagnetic stress and cold contraction stress under the action of the aluminum supporting structure, so that the working stability of the high-temperature superconducting cable is improved.
In this embodiment, N single-layer long strips are manufactured according to design requirements, M strips are welded to each single-layer long strip, and L strips are named in sequence1，L2，L3，L4，…Ln…LNN is more than or equal to 2, and the welding points of each single-layer long strip are sequentially named as K1，K2，K3，…Km…，KMM is more than or equal to 2, and the length D of the welding is determined based on the performance requirement on the cable resistance1Length D of welding1I.e. the overlapping length of two adjacent high temperature superconducting tapes 201. In practice, the welding length D is determined according to the limit of the required joint resistance1Of a value or range of values, preferably, D1Is a value or range of values from 5cm to 20 cm.
In this embodiment, the arrangement of the tapes in the single-layer long tape includes two types: the first mode is that a first strip and a last strip are removed, and two end welding points of each strip in the middle of a single-layer long strip are positioned on two sides of the strip; in a second way, the first and the last strip are removed, the two end welds of the middle strip of the single-layer long strip being located on the same side of the strip, as shown in figures 2 to 3. Considering that the high-temperature superconducting tapes have front and back sides, namely the front side with the YBCO, and the front sides of the two welded tapes face to the front side, namely the YBCO side of one tape is opposite to the YBCO side of the other tape for welding, the welding mode can reduce the welding resistance.
In this embodiment, the high temperature superconductor stack 2 consists of a single layer of long strip materialAnd the welding points of two adjacent single-layer long strips are arranged at intervals in the horizontal direction. When taking the perpendicular superpose of material with a plurality of individual layers, with the long welding point dispersion of the long strip of individual layers of different layers in the cable, that is to say, the mth welding point of the long strip of adjacent two-layer individual layers interval setting in the vertical, the projection is not overlapped in the vertical, becomes the joint of the long strip of individual layer and evenly distributed in the cable with the big joint of traditional cable. Preferably, the transverse distance between the m-th welding points of two adjacent single-layer long strips is D2Wherein m is an integer of 1 or more. Preferably, D2Greater than 1 m. It should be noted that the transverse distance between the m-th welding points of two adjacent single-layer long strips can be the same or different, and only the transverse distance between the two welding points is greater than 1m, so that the connector connecting method provided by the invention has no strict requirement on the length of the strip, the strip waste in the cable manufacturing process is greatly reduced, the short strip or the long strip does not need to be cut off, the short strip or the long strip can be reasonably utilized, and the cost can be obviously reduced.
In order to further reduce the volume of the joint, the mode of stacking a plurality of single-layer long strips vertically is optimized, the single-layer long strips are stacked from top to bottom by taking the first welding point of the top single-layer long strip as a reference, and the distance from the first welding point of the nth single-layer long strip to the first welding point of the top single-layer long strip is (n-1) multiplied by D2The length of the first strip of the top single-layer long strip is greater than the length D of the welding point1. The length of the first strip of the single-layer long strips is less than or equal to the maximum length of the single strip due to the limitation of the factory length of the single strip, when the length of the first strip of a certain single-layer long strip calculated according to increasing calculation is greater than the maximum length of the single strip, the first round of stacking is completed, the first strip is arranged from the beginning, the joint arrangement structures of a plurality of single-layer long strips are shown in figure 3, the L < th > isn-1The length of the first strip of the long strip with single layer is D3And the maximum length of a single strip is D3Therefore, from LNAnd (5) starting layers, stacking the layers in a second round according to the first round stacking mode, and repeating the process until the number of the stacked single-layer long strips meets the design requirement. Or, when the first round of stacking is completedAfter deposition, the first strip of the single-layer long strip is laid down in accordance with D2When the length of the first strip of a single-layer long strip is less than or equal to the welding length D1In the process, a second round of stacking is performed, followed by a first strip of long strips of a single layer each according to D2The length of the single-layer long strip material is gradually increased, namely, the third round of stacking is carried out according to the first round of stacking operation, and the process is sequentially circulated until the number of layers of the stacked single-layer long strip material meets the design requirement. Taking a single ribbon length of 120 meters for example, a 1200 meter long cable would require approximately 10 ribbons to be welded together and a 5-layer cable would require approximately 50 ribbons.
In a preferred embodiment of the present invention, the high temperature superconducting tapes 201 having the same length are used for manufacturing the high temperature superconducting stack 2, and the length of the high temperature superconducting tape 201 is preferably 120m ± 0.5 m. The single-layer long strips made of strips with the same length have the same structure, the positions of welding points are also the same, when the single-layer long strips are stacked, two adjacent layers of welding points with the same sequence number are stacked in a staggered mode, and after the stacking is completed, the single-layer long strips are cut according to the strips with the shortest two ends of the high-temperature superconducting stack 2.
In another preferred embodiment, the high temperature superconducting tapes 201 with different lengths are used for manufacturing the high temperature superconducting stack 2, specifically, the first tape and the last tape have different lengths. Specifically, the lengths of the first strip and the last strip are preset according to design requirements of the cable length, the resistance and the like, and the middle strips are the same in length. Illustratively, for each round of stacked single-layer long strips, the length of the first strip of the single-layer long strips is gradually increased from top to bottom, and the length of the last strip of the single-layer long strips is gradually decreased from top to bottom, or the length of the first strip of the single-layer long strips is gradually decreased from top to bottom, and the length of the last strip of the single-layer long strips is gradually increased from top to bottom.
Compared with the prior art, the high-temperature superconducting cable provided by the embodiment comprises a high-temperature superconducting stack 2, wherein the high-temperature superconducting stack 2 is formed by stacking a plurality of single-layer long strips; the long strip of individual layer is formed by many high temperature superconducting tape 201 end to end stack welding in proper order, the welding point of the long strip of adjacent two-layer individual layer interval sets up in the horizontal direction, this structural design becomes the joint of single strip and evenly distributed in the cable to the big joint of single cable, the cable size is even, there is not local increase, the joint volume has been reduced greatly, the degree of difficulty of coiling has been showing and has been reduced, and the joint design is simple, easy processing, and the work load is little, the strip is not extravagant, the strip of how long can both be used, and the cost is reduced. In addition, because the joint is small, the cable generates heat more evenly to can adjust welding length as required, and then adjust and connect resistance, have extensive application prospect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims (7)

1. A high temperature superconducting cable joint connecting method is characterized by comprising the following steps:
the method comprises the following steps: a plurality of high-temperature superconducting strips (201) are sequentially stacked end to end and welded into a single-layer long strip;
step two: stacking a plurality of single-layer long strips, wherein welding points of two adjacent single-layer long strips are arranged at intervals in the horizontal direction;
step three: binding the stacked single-layer long strips into a high-temperature superconducting stack (2) by using a binding piece (3);
the method also comprises the following four steps: coating aluminum on the surface of the high-temperature superconducting stack (2);
in the first step, the arrangement mode of the belt materials in the single-layer long belt material is as follows: removing the first strip and the last strip, wherein the two end welding points of each strip in the middle are positioned on two sides of the strip, or the two end welding points of each strip in the middle are positioned on the same side of the strip;
in the second step, when a plurality of single-layer long strips are vertically overlapped, welding points of the single-layer long strips in different layers are dispersed in the cable;
in the third step, before the high-temperature superconducting stack is wound and bound by the binding piece (3), a layer of aluminum gasket (1) is respectively added on the upper surface and the lower surface of the high-temperature superconducting stack (2);
the binding piece (3) is an aluminum wire or an aluminum sheet;
and in the fourth step, the high-temperature superconducting stack (2) is fed into an aluminum cladding machine, the aluminum cladding machine extrudes and heats an aluminum bar (5) to 450 ℃ in a friction heating mode to soften the aluminum, and the softened aluminum is extruded onto the high-temperature superconducting stack (2).
2. The hts cable joint connection method of claim 1, wherein in step two, the m-th weld of two adjacent single-layer long tapes is located at a transverse distance D2And m is an integer of 1 or more.
3. The hts cable joint-connecting method of claim 2, wherein the first welding point of the nth single-layer long tape is located at a distance (n-1) x D from the first welding point of the top single-layer long tape in a lateral direction from the first welding point of the top single-layer long tape, based on the first welding point of the top single-layer long tape, in a vertical direction2Wherein n is an integer greater than or equal to 2;
the length of the first strip of the single-layer long strip is greater than that of the welding point and less than or equal to the factory length of the single strip.
4. A hts cable based on the joint connection method according to any of claims 1-3, characterized in that the hts cable comprises a hts stack (2), the hts stack (2) being provided by stacking a plurality of single-layer long tapes; the single-layer long strip is formed by sequentially overlapping and welding a plurality of high-temperature superconducting strips (201) end to end, and welding points of two adjacent layers of single-layer long strips are arranged at intervals in the horizontal direction;
the device also comprises a binding piece (3), wherein the binding piece (3) is used for binding a plurality of single-layer long strips which are stacked into the high-temperature superconducting stack (2);
and an aluminum coating layer is arranged on the surface of the high-temperature superconducting stack (2).
5. The hts cable of claim 4 wherein the m-th weld of two adjacent single-layer long tapes is spaced apart by a lateral distance D2M is an integer of 1 or more;
stacking the top single-layer long strip from top to bottom by taking the first welding point of the top single-layer long strip as a reference, wherein the transverse distance between the first welding point of the nth single-layer long strip and the first welding point of the top single-layer long strip is (n-1) multiplied by D2Wherein n is an integer greater than or equal to 2;
the length of the first strip of the single-layer long strip is greater than that of the welding point and less than or equal to the factory length of the single strip.
6. Superconducting high temperature cable according to claim 4, characterized in that the upper and lower surfaces of the stack (2) are provided with a layer of aluminium spacers (1), respectively.
7. The hts cable according to any of claims 4-6, characterized in that the binder (3) is aluminum wire or sheet.
CN201910807890.XA 2019-08-29 2019-08-29 High-temperature superconducting cable and joint connecting method thereof Active CN110444989B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910807890.XA CN110444989B (en) 2019-08-29 2019-08-29 High-temperature superconducting cable and joint connecting method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910807890.XA CN110444989B (en) 2019-08-29 2019-08-29 High-temperature superconducting cable and joint connecting method thereof

Publications (2)

Publication Number Publication Date
CN110444989A CN110444989A (en) 2019-11-12
CN110444989B true CN110444989B (en) 2020-10-30

Family

ID=68438343

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910807890.XA Active CN110444989B (en) 2019-08-29 2019-08-29 High-temperature superconducting cable and joint connecting method thereof

Country Status (1)

Country Link
CN (1) CN110444989B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112207468B (en) * 2020-09-14 2022-08-30 立讯精密组件(昆山)有限公司 Double-layer material belt welding method and material belt
CN112614623A (en) * 2020-11-30 2021-04-06 广东电网有限责任公司 Long-line wiring method for second-generation high-temperature superconducting stacked conductor
CN113345642B (en) * 2021-06-21 2022-11-29 上海交通大学 Preparation method of high-temperature superconducting narrow stack wire and high-temperature superconducting narrow stack wire
CN114792593B (en) * 2022-06-01 2024-04-12 哈尔滨工业大学 Superconducting magnet based on rectangular superconducting lamination and assembling method
CN115083688B (en) * 2022-07-20 2022-10-21 上海超导科技股份有限公司 Method for adjusting dynamic heating channel number of superconducting strip, film coating method and superconducting strip

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103210455A (en) * 2010-09-15 2013-07-17 美国超能公司 Structure to reduce electroplated stabilizer content
CN204045635U (en) * 2014-07-31 2014-12-24 上海超导科技股份有限公司 The yttrium system superconducting tape that contact resistance all distributes and preparation facilities thereof
CN104710186A (en) * 2014-12-19 2015-06-17 上海大学 YBCO high-temperature superconductive film band connection technology and special-purpose auxiliary clamp thereof
CN108711472A (en) * 2018-05-16 2018-10-26 中国科学院合肥物质科学研究院 A kind of director circle section high-temperature superconductor conductor based on REBCO superconducting tapes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103210455A (en) * 2010-09-15 2013-07-17 美国超能公司 Structure to reduce electroplated stabilizer content
CN204045635U (en) * 2014-07-31 2014-12-24 上海超导科技股份有限公司 The yttrium system superconducting tape that contact resistance all distributes and preparation facilities thereof
CN104710186A (en) * 2014-12-19 2015-06-17 上海大学 YBCO high-temperature superconductive film band connection technology and special-purpose auxiliary clamp thereof
CN108711472A (en) * 2018-05-16 2018-10-26 中国科学院合肥物质科学研究院 A kind of director circle section high-temperature superconductor conductor based on REBCO superconducting tapes

Also Published As

Publication number Publication date
CN110444989A (en) 2019-11-12

Similar Documents

Publication Publication Date Title
CN110444989B (en) High-temperature superconducting cable and joint connecting method thereof
US8437819B2 (en) Superconductor cable
US6725071B2 (en) Fully transposed high tc composite superconductor, method for producing the same and its use
CN108711472B (en) Quasi-circular-section high-temperature superconducting conductor based on REBCO superconducting tape
Uglietti et al. Development of HTS conductors for fusion magnets
WO2012112923A2 (en) Superconducting cables and methods of making the same
Takayasu et al. Investigation of twisted stacked-tape cable conductor
US9105396B2 (en) Superconducting flat tape cable magnet
Yagai et al. Development of design for large scale conductors and coils using MgB2 for superconducting magnetic energy storage device
CN105869782A (en) Preparation method of high-temperature superconducting line
JP3796259B2 (en) Method for producing perfect dislocation high Tc composite superconductor and conductor produced by the method
WO2021262319A2 (en) Cabling method of superconducting flat wires
CN107437449A (en) A kind of high-temperature superconducting magnet connection in series-parallel combining structure
EP3747034B1 (en) Wound hts magnet coils
CN210156169U (en) High-temperature superconducting cable
EP1174888A2 (en) Superconducting power transmission cable
US7383625B2 (en) Method of manufacturing continuous disk winding for high-voltage superconducting transformers
US20070056158A1 (en) Method for manufacturing second-generation superconducting wire for transposition and superconducting coil manufactured using the same
US20210012929A1 (en) Superconductor Cable or superconductor cable-in-conduit-conductor with clocking feature
JP3892605B2 (en) Superconducting coil device for current limiting element
US11328841B2 (en) Method and device for producing a superconductive conductor
WO2011062344A1 (en) Multiple transposition method for a superconducting wire
CN111210965A (en) Superconducting current limiter non-inductive coil and connection method thereof
CN110931162A (en) Self-shielding cold insulation direct current high-temperature superconducting current-limiting cable
CN113012862B (en) Combined superconducting composite conductor and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant