CN103943272A - Superconducting cable end structure - Google Patents
Superconducting cable end structure Download PDFInfo
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- CN103943272A CN103943272A CN201410021552.0A CN201410021552A CN103943272A CN 103943272 A CN103943272 A CN 103943272A CN 201410021552 A CN201410021552 A CN 201410021552A CN 103943272 A CN103943272 A CN 103943272A
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- superconducting
- cylindrical electrode
- superconducting cable
- tape
- solder
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- 239000000463 material Substances 0.000 claims abstract description 45
- 229910000679 solder Inorganic materials 0.000 claims description 30
- 238000003825 pressing Methods 0.000 claims description 20
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 11
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 10
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000005476 soldering Methods 0.000 claims 6
- 239000004020 conductor Substances 0.000 abstract description 5
- 230000003139 buffering effect Effects 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000004745 nonwoven fabric Substances 0.000 description 7
- 239000010949 copper Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000003381 stabilizer Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- -1 i.e. Polymers 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Classifications
-
- 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
- Superconductors And Manufacturing Methods Therefor (AREA)
- Gas Or Oil Filled Cable Accessories (AREA)
Abstract
A superconducting cable end structure can connect a superconducting cable of a multi-layer structure with a plurality of lead-out conductors with high connection reliability. According to the superconducting cable end structure, the superconducting cable (110) passes through cylindrical electrodes (120-1,120-2), superconducting belts of the superconducting cable (110) are electrically connected with outer surfaces of the cylindrical electrodes (120-1,120-2). A buffering material (140) is arranged between the superconducting cable (110) and the cylindrical electrode (120-1) through which the superconducting cable (110) passes. Thus, the superconducting belts are prevented from being damaged due to collision between the outer surfaces of the superconducting cable (110) and the inner surface of the cylindrical electrode (120-1), and connection reliability is improved further.
Description
Technical Field
The present invention relates to a terminal structure of a superconducting cable having a multilayer structure.
Background
In general, in a superconducting cable, a superconducting tape is spirally wound around the outer periphery of a former (core material). In order to transmit a large current, the superconducting tapes are often arranged in multiple concentric layers. Between the layers of the superconducting tapes arranged in multiple layers (i.e., between the superconducting tapes), a pressing tape for pressing the superconducting tapes or electrically insulating the superconducting tapes from each other is arranged.
A terminal structure of a superconducting cable (which may also be referred to as a "structure of a terminal portion of a superconducting cable") for leading out a superconducting cable having such a multilayer structure from an ultra-low temperature portion to a normal temperature portion is disclosed in patent documents 1 to 3 and the like. These patent documents describe the following structures: the superconducting tapes of the respective layers are connected to the same number of lead-out conductors as the number of layers of the superconducting tapes, and the superconducting cable installed in the ultra-low temperature portion is led out to the normal temperature portion using the plurality of lead-out conductors.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2001-6453
Patent document 2: japanese laid-open patent publication No. 11-73824
Patent document 3: japanese laid-open patent publication No. 2004-265715
Disclosure of Invention
Problems to be solved by the invention
However, in the end structure of the superconducting cable having the multilayer structure, since it is necessary to connect a plurality of superconducting tapes to a plurality of lead conductors, the structure of the connection portion inevitably becomes complicated. As a result, the connection reliability may be degraded.
The present invention has been made in view of the above-described aspects, and provides a terminal structure of a superconducting cable capable of improving connection reliability when a superconducting cable having a multilayer structure is connected to a plurality of lead conductors.
Means for solving the problems
One aspect of the superconducting cable terminal structure of the present invention is a superconducting cable terminal structure including: a superconducting cable having superconducting wires concentrically arranged in a plurality of layers; and a cylindrical electrode connected to a distal end of the superconducting wire, wherein the superconducting cable passes through the inside of the cylindrical electrode, the superconducting wire is electrically connected to an outer surface of the cylindrical electrode, and a buffer material is provided between the superconducting cable and the cylindrical electrode.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, since the buffer material is provided between the superconducting cable and the cylindrical electrode, the superconducting wire of the superconducting cable passing through the inside of the cylindrical electrode can be prevented from being damaged by receiving the force of the inner surface of the cylindrical electrode. As a result, a terminal structure with improved connection reliability can be realized.
Drawings
Fig. 1 is a sectional view showing a schematic configuration of a terminal structure of a superconducting cable according to an embodiment.
Fig. 2 is a main part configuration diagram of the end structure viewed from the rear side of the cylindrical electrode.
Fig. 3 is a diagram showing a state in which a superconducting tape is wound.
Fig. 4 is a sectional view showing a section a-a' of fig. 1.
Fig. 5 is a sectional view showing a structure of another embodiment.
Description of the reference symbols
100 terminal structure
110 superconducting cable
111 inner stable layer (frame)
112. 114 pressing belt
113. 115 superconductive tape
113S interval
120. 120-1, 120-2 cylindrical electrode
121 cylindrical part
122 taper part
130. 130-1, 130-2 lead cable
140 buffer material
140S gap
150 connecting belt
151 first solder
152 second solder
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Fig. 1 is a sectional view showing a schematic configuration of a terminal structure of a superconducting cable according to an embodiment of the present invention. In the embodiments, the case where the superconducting cable has a double-layer structure, i.e., a double-layer superconducting tape, is exemplified for the sake of simplifying the description, but the present invention can be applied even to the case where the superconducting cable has a triple-layer structure or more, i.e., a triple-layer or more superconducting tape. Fig. 2 is a main part configuration diagram of the end structure as viewed from the rear side (i.e., the right side of fig. 1).
The terminal structure 100 includes a superconducting cable 110 and a cylindrical extraction electrode (hereinafter referred to as "cylindrical electrode") 120. Cylindrical electrodes 120 corresponding to the number of layers of the superconducting tapes are provided. In the example of the present embodiment, the superconducting cable 110 has two layers of superconducting tapes, and therefore, two cylindrical electrodes 120-1 and 120-2 are provided. Lead cables 130-1, 130-2 are electrically connected to the respective cylindrical electrodes 120-1, 120-2. In actual use, the superconducting cable 110 and the cylindrical electrode 120 are immersed in an ultra-low temperature liquid such as liquid nitrogen. Then, the current of the superconducting cable is led out to the room temperature portion from the lead cable 130 via the cylindrical electrode 120. For example, the lead cable 130 is led out to the air through a polymer sleeve (not shown) or the like.
The superconducting cable 110 includes: an inner stabilizer layer (skeleton) 111, a pressing tape 112, a first superconducting tape 113, a pressing tape 114, and a second superconducting tape 115. The inner stabilizer layer 111 has a cylindrical shape and is formed of copper twisted wires. A pressing tape 112 made of a nonwoven fabric is wound around the outer periphery of the inner stabilizer layer 111. As shown in fig. 3, the first superconducting tape 113 is spirally wound around the outer periphery of the pressing tape 112. A pressing tape 114 made of a nonwoven fabric is wound around the outer periphery of the first superconducting tape 113. Like the first superconducting tape 113, the second superconducting tape 115 is wound spirally around the outer periphery of the pressing tape 114. In the example of the present embodiment, 10 superconducting tapes are spirally wound for each layer. That is, the first superconducting tape 113 and the second superconducting tape 115 are each formed of 10 superconducting tapes. Various superconducting materials that have been proposed in the past can be used as the material of the superconducting tapes 113 and 115. The superconducting tapes 113 and 115 are not necessarily tape-shaped, and may be any superconducting wire material.
Actually, the superconducting cable 110 is provided with an electric insulating layer, a superconducting shield layer, an external stabilizer layer, a bellows tube, and the like on the outer periphery side of the second superconducting tape 115, but these components are removed at the end portions where the superconducting tapes 113 and 115 are connected to the cylindrical electrode 120, and therefore these components are omitted in fig. 1.
The cylindrical electrode 120(120-1, 120-2) is cylindrical as a whole, and has a cylindrical portion 121 and a tapered portion 122. Fig. 2 shows that the cylindrical electrode 120 has a hollow structure through which the superconducting cable 110 can pass. Of the superconducting tapes 113 and 115 of the superconducting cable 110, the second superconducting tape 115 provided on the outermost periphery side is connected to the outer surface of the cylindrical electrode 120-1 provided on the farthest end side by solder. The first superconducting tape 113 provided second from the outermost periphery (innermost periphery in the case of the example of fig. 1) is connected by solder to the outer surface of the cylindrical electrode 120-2 provided on the distal end side (most distal end side in the case of the example of fig. 1) next to the cylindrical electrode 120-1 on the distal end side. That is, the superconducting cable 110 is sequentially passed through the plurality of cylindrical electrodes 120-1, 120-2 toward the distal end side, and the superconducting tapes 115, 113 on the outer circumferential side are sequentially connected to the outer surfaces of the cylindrical electrodes 120-1, 120-2 one by one toward the distal end side.
Superconducting tapes 115 and 113 are electrically connected to the outer surfaces of tapered portions 122 of cylindrical electrodes 120-1 and 120-2 by solder. As described above, by connecting the superconducting tapes 115 and 113 to the tapered portion 122, the superconducting tapes can be connected without being bent almost, and therefore, the tension at the connection portion can be reduced, so that the connection reliability is improved, and the workability at the time of connection is improved.
In addition to this structure, a buffer 140 is provided between the inner surface of the cylindrical electrode 120-1 and the outer surface of the superconducting cable 110 penetrating the cylindrical electrode 120-1. This prevents the superconducting tape 113 from being damaged due to the inner surface of the cylindrical electrode 120-1 coming into contact with the outer surface of the superconducting cable 110. The reason why the buffer material 140 is not provided between the inner surface of the cylindrical electrode 120-2 closest to the distal end and the outer surface of the superconducting cable 110 penetrating the cylindrical electrode 120-2 is that: the superconducting tape (i.e., the superconducting tape to be protected) is not present in the superconducting cable 110 penetrating the cylindrical electrode 120-2.
Here, FRP (Fiber Reinforced Plastics) is preferably used as the cushioning material 140. FRP, i.e., fiber reinforced plastic, is a composite material having strength improved by mixing fibers such as glass fibers into plastic. In addition, as long as it is FRP, Glass Fiber Reinforced Plastic (GFRP), polyethylene fiber reinforced plastic (DFRP), Carbon Fiber Reinforced Plastic (CFRP), or the like may be used. The buffer material 140 is not limited to FRP, and various materials having such rigidity as to block the force or such elasticity as to absorb the force that does not directly transmit the force at the edge portion of the inner surface of the cylindrical electrode 120-1 or the like to the superconducting tape 113 may be used as the buffer material 140. However, since the cushion material 140 is immersed in the cryogenic liquid, it is necessary to be able to withstand cryogenic temperatures. In the case of the present embodiment, the buffer material 140 is in a band shape and is attached to the outer surface of the superconducting cable 110. The buffer material 140 may be a type of buffer material applied to the outer surface of the superconducting cable.
In the present embodiment, the buffer 140 is configured by providing 10 FRPs having a length of 160mm in the longitudinal direction of the superconducting cable 110 and a thickness of 0.1mm on the outer periphery of the pressing belt 114.
Further, although the pressing tape 114 is also present between the superconducting tape 113 and the cylindrical electrode 120-1, the pressing tape 114 is a nonwoven fabric, and therefore, it is hardly expected to exert a buffer action. Therefore, if only the pressing tape 114 is provided, the superconducting tape 113 may be damaged by the force of the inner surface of the cylindrical electrode 120-1. This is useful for preventing the superconducting tape 113 from being damaged by the buffer material 140.
In practice, the buffer material 140 is attached by the worker when the superconducting cable 110 is connected to the cylindrical electrodes 120-1 and 120-2. Specifically, the worker first attaches the buffer material 140 to the outer circumferential position of the superconducting cable 110 which is considered to be likely to be abutted by the cylindrical electrode 120-1. Next, the worker inserts the superconducting cable 110 with the buffer material 140 attached thereto into the cylindrical electrode 120-1. Then, the worker connects superconducting tape 115 to the outer surface of cylindrical electrode 120-1 by solder.
FIG. 4 shows the section A-A' of FIG. 1. In fig. 4, the superconducting tape 115 (fig. 1) on the outer circumferential side is omitted for simplicity of the drawing.
As can be seen from fig. 3 and 4, the superconducting tapes 113 are wound in a spiral shape with a plurality of (10 in the case of the present embodiment) superconducting tapes each having a slight interval 113S. The superconducting tapes 115 are also the same. On the other hand, the pressing tapes 112 and 114 are each formed by winding a single nonwoven fabric spirally without a gap. The superconducting tapes 113 and 115 are formed by winding 10 superconducting tapes having a thickness of 0.1mm and a width of 5mm at a twist pitch of 250mm, for example. The pressing belts 112 and 114 are formed by, for example, 1/2-lap winding of a nonwoven fabric having a thickness of 0.2mm and a width of 45mm (that is, winding the nonwoven fabric so as to overlap half the width of the belt per one turn).
As shown in fig. 4, the belt-shaped cushioning material 140 is provided on the outer peripheral surface of the pressing belt 114 with a gap 140S between the adjacent cushioning materials 140. The buffer material 140 may be wound in a spiral shape, or may be attached in parallel to the longitudinal direction of the superconducting cable 110. By providing the buffer materials 140 with the gap 140S in this manner, liquid nitrogen filled around the superconducting cable 110 can enter the inside of the cylindrical electrode 120-1 through the gap 140S between the buffer materials 140, and thus, the superconducting characteristics inside the cylindrical electrode 120-1 can be prevented from being degraded.
Here, in a state where the superconducting cable 110 is actually inserted into the cylindrical electrode 120-1, a gap is generated between the outer surface of the superconducting cable 110 and the inner surface of the cylindrical electrode 120-1 (actually, the tip of the tapered portion 122), and the superconducting cable 110 is in a state of being movable in the radial direction with respect to the cylindrical electrode 120-1 within the range of the gap. As a result, if the superconducting cable 110 or the cylindrical electrode 120-1 moves in the radial direction for some reason without the buffer material 140, the inner surface of the cylindrical electrode 120-1 may collide with the outer surface of the superconducting cable 110 to damage the superconducting tape 113.
The buffer material 140 needs to be disposed at a position to prevent the inner surface of the cylindrical electrode 120-1 from colliding with the outer surface of the superconducting cable 110. As shown in fig. 4, the superconducting tape 113 can be protected by providing the buffer material 140 at an outer circumferential position corresponding to the position of the superconducting tape 113, but actually, it is difficult for the worker to visually observe the superconducting tape 113 because the pressing tape 114 blocks it, and thus it is difficult to provide the buffer material 140 at the position as described above.
Therefore, it is necessary to determine the position of the buffer material 140 in consideration of the possibility that the inner surface of the cylindrical electrode 120-1 collides with the outer surface of the superconducting cable 110 through the gap 140S and the superconducting tape 113 is damaged when the gap 140S between the buffer materials 140 is excessively large. The gap 140S is preferably set to 1/2 or less of the width of the buffer 140, although it depends on the width or thickness of the buffer 140, the outer diameter of the superconducting cable 110 at the position where the buffer 140 is provided, and the like. Of course, the smaller the gap 140S, the less likely the superconducting tape 113 will be damaged, but it also results in a reduction in the amount of liquid nitrogen passing through the gap 140S, and therefore it is important to set the buffer material 140 in place in consideration of both of the above aspects.
As described above, according to the present embodiment, in the terminal structure 100 of the superconducting cable in which the superconducting cable 110 having the multilayer structure is sequentially connected to the plurality of cylindrical electrodes 120-1 and 120-2, the buffer material 140 is provided between the superconducting cable 110 and the cylindrical electrode 120-1 through which the superconducting cable 110 is inserted, so that the superconducting tape 113 constituting the superconducting cable 110 can be prevented from being damaged, and as a result, the connection reliability can be improved.
Further, since the buffer material 140 has the gap 140S for passing the ultralow temperature liquid from the outer peripheral side to the inner peripheral side of the buffer material 140, the ultralow temperature liquid can enter the inside of the cylindrical electrode 120-1, and therefore, the temperature of the superconducting tape 113 inside the cylindrical electrode 120-1 can be suppressed from becoming higher than a predetermined temperature, and the superconducting characteristics can be prevented from being degraded.
In the above embodiment, the buffer material 140 is provided in the superconducting cable 110, but a buffer material may be provided on the cylindrical electrode 120-1 side. For example, a cylindrical buffer material may be attached to the tip of the tapered portion 122 in advance, and the superconducting cable 110 may be inserted into the cylindrical buffer material. In this case, holes or slits for passing liquid nitrogen may be formed in advance in various portions of the buffer material.
In the above embodiment, the cylindrical electrodes 120-1 and 120-2 have a cylindrical shape, and in short, the cylindrical electrodes may have a hollow portion through which the superconducting cable 110 passes and have a superconducting wire connected to the outer surface thereof, and may have a square cylindrical shape, for example.
It was confirmed through experiments that the superconducting tape 113 can be prevented from being damaged by using the structure of the present embodiment. In this experiment, a cylindrical electrode having an inner diameter of 22mm, an outer diameter of 30mm, a total length in the cable axis direction of 160mm, and a length of 50mm in the cylindrical portion 121 was used as the cylindrical electrode 120-1. In the embodiment, 10 FRP pieces having a length of 160mm and a thickness of 0.1mm are provided as the cushion material 140 on the outer periphery of the pressing belt 114. On the other hand, in the comparative example, the cushioning material 140 is not provided. Further, a nonwoven fabric having a thickness of 0.15mm was used as the pressing belt 114. As a result of the experiment, the critical current obtained via the cylindrical electrode 120-2 was 900A in the comparative example, and 1300A in the example. In addition, in the comparative example, the breakage of 3 of 10 superconducting tapes 113 was confirmed, whereas in the example, the breakage of the superconducting tape 113 was not confirmed.
In the above embodiment, the superconducting tapes 115 and 113 are directly connected to the outer surfaces of the cylindrical electrodes 120-1 and 120-2, but as shown in fig. 5, the superconducting tapes 115(113) may be connected to the outer surfaces of the cylindrical electrodes via a connecting tape 150 having conductivity and flexibility such as copper. Connection tape 150 is connected to cylindrical electrode 120-1(120-2) at a first end portion via first solder 151, and is connected to superconducting tape 115(113) at a second end portion via second solder 152. The connection tape 150 is shown connected to the cylindrical electrode 120-1(120-2) by a first solder 151 on the surface facing the cylindrical electrode 120-1(120-2) at the first end, and connected to the superconducting tape 115(113) by a second solder 152 on the surface opposite to the surface facing the cylindrical electrode 120-1(120-2) at the second end. In fig. 1, the solder is omitted for simplicity.
Here, a solder having a melting point lower than that of the first solder 151 is selected as the second solder 152. Specifically, the first solder 151 is high-melting-point solder having a melting start condition (solidus line) exceeding 183 ℃, and is generally prepared by blending silver (Ag), antimony (Sb), indium (In), and the like based on tin (Sn) or lead (Pb). For example, an alloy of standard components, i.e., sn3.0%, ag0.5%, and copper (Cu) may be used. The second solder 152 is low-melting point solder having a melting start condition (solidus line) of less than 183 ℃, and is generally prepared by adding cadmium (Cd), bismuth (Bi), In, and the like In addition to Sn and Pb.
In this case, for example, welding may be performed in the following order. First, the first end of connecting band 150 is joined to the outer surface of cylindrical electrode 120-1(120-2) by first solder 151. Next, the superconducting tape 115(113) is joined to the second end of the connection tape 150 by the second solder 152 having a melting point lower than that of the first solder 151.
By connecting superconducting tapes 115(113) to the outer surface of cylindrical electrode 120-1(120-2) via connecting tape 150 in this manner, the connection portion between cylindrical electrode 120-1(120-2) and superconducting tapes 115(113) can be prevented from peeling off due to the difference in shrinkage rates of the respective materials when cooled. That is, even if the cylindrical electrode 120-1(120-2) and the superconducting cable 110 contract at different contraction rates during cooling, the difference in contraction can be absorbed by the bending of the connection tape 150, and as a result, the separation of the connection portion can be prevented. Further, the position where the connection tape 150 is connected to the cylindrical electrode 120-1(120-2) and the position where the superconducting tapes 115(113) are connected to the connection tape 150 are set to non-overlapping positions in the longitudinal direction of the connection tape 150, and a solder having a melting point lower than that of the first solder 151 for connecting the connection tape 150 to the cylindrical electrode 120-1(120-2) is used as the second solder 152 for connecting the superconducting tapes 115(113) to the connection tape 150, whereby the superconducting performance of the superconducting tapes 115(113) can be prevented from being deteriorated by heat at the time of welding.
Industrial applicability
The present invention is useful for a terminal structure of a superconducting cable having a multilayer structure.
Claims (8)
1. A terminal structure of a superconducting cable, comprising:
a superconducting cable having superconducting wires concentrically arranged in a plurality of layers; and
a cylindrical electrode connected to a distal end of the superconducting wire,
wherein,
the superconducting cable passes through the inside of the cylindrical electrode,
the superconducting wire is electrically connected to an outer surface of the cylindrical electrode,
a buffer material is provided between the superconducting cable and the cylindrical electrode.
2. The terminal structure of a superconducting cable according to claim 1, wherein the buffer is provided between an outer peripheral surface of a pressing belt wound around an outer periphery of the superconducting wire and an inner surface of the cylindrical electrode.
3. The superconducting cable terminal structure according to claim 1 or 2, wherein the buffer has a gap for allowing the cryogenic liquid to pass from the outer circumferential side to the inner circumferential side of the buffer.
4. The superconducting cable terminal structure according to claim 1 or 2, wherein the buffer material is a fiber-reinforced plastic.
5. The superconducting cable terminal structure according to claim 3, wherein the buffer is a fiber-reinforced plastic.
6. The terminal structure of a superconducting cable according to claim 1 or 2,
the superconducting wire is connected to the outer surface of the cylindrical electrode via a conductive connection tape,
the connecting band and the cylindrical electrode are connected by first soldering tin,
the superconducting wire and the connecting band are connected by second soldering tin,
the melting point of the second solder is lower than the melting point of the first solder.
7. The end structure of a superconducting cable of claim 3,
the superconducting wire is connected to the outer surface of the cylindrical electrode via a conductive connection tape,
the connecting band and the cylindrical electrode are connected by first soldering tin,
the superconducting wire and the connecting band are connected by second soldering tin,
the melting point of the second solder is lower than the melting point of the first solder.
8. The end structure of a superconducting cable of claim 5,
the superconducting wire is connected to the outer surface of the cylindrical electrode via a conductive connection tape,
the connecting band and the cylindrical electrode are connected by first soldering tin,
the superconducting wire and the connecting band are connected by second soldering tin,
the melting point of the second solder is lower than the melting point of the first solder.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-010165 | 2013-01-23 | ||
| JP2013010165A JP5829634B2 (en) | 2013-01-23 | 2013-01-23 | Superconducting cable terminal structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103943272A true CN103943272A (en) | 2014-07-23 |
| CN103943272B CN103943272B (en) | 2017-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410021552.0A Expired - Fee Related CN103943272B (en) | 2013-01-23 | 2014-01-16 | The end structure body of hyperconductive cable |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5829634B2 (en) |
| CN (1) | CN103943272B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113517088A (en) * | 2021-08-03 | 2021-10-19 | 广东电网有限责任公司 | Strip stacking structure and superconducting cable thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285647B (en) * | 2018-09-26 | 2019-12-17 | 中国科学院合肥物质科学研究院 | liquid helium soaking type low-temperature superconducting assembly for large-current high-temperature superconducting current lead |
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| CN1525494A (en) * | 2003-02-28 | 2004-09-01 | ס�ѵ�����ҵ��ʽ���� | Terminal structure of direct electric current superconducting cable and dc superconducting cable line |
| US20060011377A1 (en) * | 2004-07-16 | 2006-01-19 | Frank Schmidt | Terminal structure |
| CN101982902A (en) * | 2010-09-14 | 2011-03-02 | 上海电缆研究所 | Extraction device and interconnecting structure for low-temperature insulation superconducting cable shielding conductor |
| CN102148074A (en) * | 2009-10-30 | 2011-08-10 | 尼克桑斯公司 | System comprising at least one superconducting cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005019323A (en) * | 2003-06-27 | 2005-01-20 | Fujikura Ltd | Transposition segment and superconductor applying equipment |
| DE202008017997U1 (en) * | 2007-03-21 | 2011-04-07 | Nkt Cables Ultera A/S | termination unit |
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2013
- 2013-01-23 JP JP2013010165A patent/JP5829634B2/en not_active Expired - Fee Related
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- 2014-01-16 CN CN201410021552.0A patent/CN103943272B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1525494A (en) * | 2003-02-28 | 2004-09-01 | ס�ѵ�����ҵ��ʽ���� | Terminal structure of direct electric current superconducting cable and dc superconducting cable line |
| US20060011377A1 (en) * | 2004-07-16 | 2006-01-19 | Frank Schmidt | Terminal structure |
| CN102148074A (en) * | 2009-10-30 | 2011-08-10 | 尼克桑斯公司 | System comprising at least one superconducting cable |
| CN101982902A (en) * | 2010-09-14 | 2011-03-02 | 上海电缆研究所 | Extraction device and interconnecting structure for low-temperature insulation superconducting cable shielding conductor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113517088A (en) * | 2021-08-03 | 2021-10-19 | 广东电网有限责任公司 | Strip stacking structure and superconducting cable thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014143812A (en) | 2014-08-07 |
| CN103943272B (en) | 2017-10-20 |
| JP5829634B2 (en) | 2015-12-09 |
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