JPH07114838A - Oxide superconducting cable - Google Patents

Oxide superconducting cable

Info

Publication number
JPH07114838A
JPH07114838A JP5281666A JP28166693A JPH07114838A JP H07114838 A JPH07114838 A JP H07114838A JP 5281666 A JP5281666 A JP 5281666A JP 28166693 A JP28166693 A JP 28166693A JP H07114838 A JPH07114838 A JP H07114838A
Authority
JP
Japan
Prior art keywords
wire
cable
spiral
oxide superconducting
former
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.)
Pending
Application number
JP5281666A
Other languages
Japanese (ja)
Inventor
Shigenori Suketani
重徳 祐谷
Katsunobu Hosoya
勝宣 細谷
Makoto Hiraoka
誠 平岡
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.)
Mitsubishi Cable Industries Ltd
Original Assignee
Mitsubishi Cable Industries Ltd
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 Mitsubishi Cable Industries Ltd filed Critical Mitsubishi Cable Industries Ltd
Priority to JP5281666A priority Critical patent/JPH07114838A/en
Publication of JPH07114838A publication Critical patent/JPH07114838A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/60Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

Landscapes

  • Superconductors And Manufacturing Methods Therefor (AREA)

Abstract

PURPOSE:To prevent decrease in critical current characteristics and enhance flexibility to increase installation workability by arranging a spiral oxide superconductive element wire in the circumference of a cable former comprising a spiral pipe or corrugated pipe covered with a wire interwoven material. CONSTITUTION:A wire material interwoven cover layer 2 made of fibers or ribbons with uneven surface as a buffer is arranged in a cable former 1 made of a stainless steel spiral pipe or corrugated pipe. Oxide superconductive element wires 3, 4 are spirally piled up on the cover layer 2 in multilayer winding structure to form a cable. By using the spiral pipe or the corrugated pipe as the cable former, the stress-strain of the element wire generating by expansion coefficient difference between the element wire and the cable former is decreased to prevent drop in critical current characteristics. By the flexibility based on the shape change, installation work is facilitated and workability is enhanced.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、電力ケーブル等に好適
な良敷設性で超電導特性に優れる酸化物超電導ケーブル
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oxide superconducting cable which is suitable for power cables and has excellent layability and excellent superconducting properties.

【0002】[0002]

【従来の技術】酸化物超電導体の特性を利用して大電流
送電をコンパクトな電力ケーブルで実現するシステムが
検討されている。
2. Description of the Related Art A system for realizing high current transmission with a compact power cable by utilizing the characteristics of an oxide superconductor has been studied.

【0003】従来、かかるシステムに用いる電力ケーブ
ルとしては、金属シースを有する酸化物超電導線を金属
パイプからなるケーブルフォーマーの外周に螺旋巻した
ものが知られていた。しかしながら、超電導状態を形成
するために低温に冷却した際に臨界電流等の特性が低下
すると共に、ケーブルを曲げることが困難で可撓性に乏
しく敷設時の作業性に劣る問題点があった。
Conventionally, as a power cable used in such a system, there has been known one in which an oxide superconducting wire having a metal sheath is spirally wound around the outer circumference of a cable former made of a metal pipe. However, when cooled to a low temperature to form a superconducting state, characteristics such as critical current are deteriorated, and it is difficult to bend the cable, and the flexibility is poor and workability at the time of laying is poor.

【0004】[0004]

【発明が解決しようとする課題】本発明は、良好な可撓
性を示して敷設作業性に優れると共に、ケーブルを低温
に冷却することで臨界電流等の特性が低下しにくくて超
電導特性に優れる酸化物超電導ケーブルを得ることを課
題とする。
DISCLOSURE OF THE INVENTION The present invention exhibits good flexibility and is excellent in laying workability, and when the cable is cooled to a low temperature, characteristics such as critical current are unlikely to be deteriorated and superconducting characteristics are excellent. A subject is to obtain an oxide superconducting cable.

【0005】[0005]

【課題を解決するための手段】本発明は、線材編成物で
被覆した螺旋管又はコルゲート管からなるケーブルフォ
ーマーの外周に、金属シースを有する酸化物超電導線か
らなる螺旋状の素線を有することを特徴とする酸化物超
電導ケーブルを提供するものである。
According to the present invention, a spiral wire made of an oxide superconducting wire having a metal sheath is provided on the outer circumference of a cable former made of a spiral tube or a corrugated tube covered with a wire knitted material. The present invention provides an oxide superconducting cable characterized by the above.

【0006】[0006]

【作用】ケーブルフォーマーとして螺旋管又はコルゲー
ト管を用いることで、ケーブルを低温に冷却した際に臨
界電流等の特性が低下することを防止できると共に、螺
旋管又はコルゲート管の良好な変形性に基づいて良可撓
性の敷設作業性に優れるケーブルとすることができる。
前記の低温冷却による特性低下の防止は、低温冷却時に
おける素線とケーブルフォーマーとの膨張率差等による
熱変形差を螺旋管又はコルゲート管が縮径化するなどし
て変形し、その変形で低温冷却による素線の収縮分が吸
収されてより線を形成する酸化物超電導線に発生する応
力歪が軽減されることによるものと思われる。
By using the spiral tube or the corrugated tube as the cable former, it is possible to prevent the characteristics such as critical current from being deteriorated when the cable is cooled to a low temperature, and to improve the deformability of the spiral tube or the corrugated tube. Based on this, a cable having good flexibility and excellent workability in laying can be obtained.
In order to prevent the characteristic deterioration due to the low temperature cooling, the thermal deformation difference due to the difference in expansion coefficient between the wire and the cable former during low temperature cooling is deformed by reducing the diameter of the spiral tube or corrugated tube, and the deformation It is considered that the stress strain generated in the oxide superconducting wire forming the twisted wire is reduced by absorbing the shrinkage of the wire due to low temperature cooling.

【0007】また前記において、螺旋管又はコルゲート
管の外周を線材編成物で被覆してなるケーブルフォーマ
ーとすることで螺旋管又はコルゲート管の前記利点を損
ねることなく、それに螺旋状に設ける酸化物超電導線と
ケーブルフォーマーとの接触面積ないし密着状態の向上
をはかることができ、それによりケーブルフォーマーと
の部分的接触による酸化物超電導線の局所歪の発生を防
止ないし抑制することができる。酸化物超電導線の局所
歪は臨界電流の低下原因となる。
Further, in the above description, a cable former is formed by coating the outer periphery of the spiral tube or corrugated tube with a wire material knitted product, and the oxide provided in a spiral shape on the spiral tube or corrugated tube without impairing the above advantages. It is possible to improve the contact area or the close contact state between the superconducting wire and the cable former, and thereby prevent or suppress the occurrence of local strain of the oxide superconducting wire due to partial contact with the cable former. The local strain of the oxide superconducting wire causes a decrease in the critical current.

【0008】[0008]

【実施例】本発明の酸化物超電導ケーブルは、線材編成
物で被覆した螺旋管又はコルゲート管からなるケーブル
フォーマーの外周に、金属シースを有する酸化物超電導
線からなる螺旋状の素線を有するものである。
EXAMPLE An oxide superconducting cable of the present invention has a spiral wire made of an oxide superconducting wire having a metal sheath on the outer circumference of a cable former made of a spiral tube or a corrugated tube covered with a wire rod formation. It is a thing.

【0009】かかる酸化物超電導ケーブルの例を図1、
図2に示した。1が螺旋管からなるケーブルフォーマ
ー、2が線材編成物からなる被覆層、3が1層目の素
線、4が2層目の素線である。また5がコルゲート管か
らなるケーブルフォーマーである。なお6は、線材編成
物の被覆層2の上に設けたポリマーフィルム層であり、
これは螺旋管又はコルゲート管を用いたケーブルフォー
マーのいずれにも必要に応じて設けることができる。
An example of such an oxide superconducting cable is shown in FIG.
It is shown in FIG. Reference numeral 1 is a cable former made of a spiral tube, 2 is a coating layer made of a knitted wire material, 3 is a first-layer strand, and 4 is a second-layer strand. Further, 5 is a cable former composed of a corrugated pipe. In addition, 6 is a polymer film layer provided on the coating layer 2 of the knitted wire material,
This can be provided on either a spiral or corrugated cable former as required.

【0010】本発明においてケーブルフォーマーのベー
スとして用いる螺旋管、コルゲート管は、形成目的の酸
化物超電導ケーブルに応じて適宜なものを用いてよい。
一般には螺旋管としては幅2〜10mm、厚さ1〜5mmの
板状線材を1〜5mmの隙間を設けて外径10〜30mmの
筒状に螺旋巻した形態のもの、コルゲート管としては凸
部密着型ないし凸部のピッチが30cm以下、就中15cm
以下で凹部の深さが1〜10mm、外径が10〜30mmで
肉厚が1〜5mmのものなどが用いられる。
The spiral tube and corrugated tube used as the base of the cable former in the present invention may be appropriately selected depending on the oxide superconducting cable to be formed.
Generally, as a spiral tube, a plate wire having a width of 2 to 10 mm and a thickness of 1 to 5 mm is spirally wound into a tubular shape having an outer diameter of 10 to 30 mm with a gap of 1 to 5 mm provided. Part-contact type or convex pitch is 30 cm or less, especially 15 cm
In the following, a recess having a depth of 1 to 10 mm, an outer diameter of 10 to 30 mm and a wall thickness of 1 to 5 mm is used.

【0011】また螺旋管、コルゲート管の形成材として
は、ステンレス、銀、銅の如き金属やプラスチック、あ
るいはカーボン繊維やガラス繊維等を用いたFRPなど
が一般に用いられる。交流送電用のケーブルの形成に
は、FRP等からなる螺旋管やコルゲート管が電力損失
が少なくて有利である。
As the material for forming the spiral tube and the corrugated tube, metals such as stainless steel, silver and copper or plastics, or FRP using carbon fiber or glass fiber is generally used. For forming a cable for AC power transmission, a spiral tube or corrugated tube made of FRP or the like is advantageous because power loss is small.

【0012】螺旋管又はコルゲート管の外周の線材編成
物からなる被覆層は、より線を形成する酸化物超電導線
が隙間や凹凸等のため螺旋管やコルゲート管と部分的に
接触した状態となり、ケーブルの曲げ延ばし等により酸
化物超電導線に応力差による局所歪が発生して特性の劣
化を誘発することを防止する目的で設ける。
The coating layer composed of the wire rod knitted material on the outer periphery of the spiral tube or corrugated tube is in a state where the oxide superconducting wire forming the stranded wire is in partial contact with the spiral tube or corrugated tube due to gaps or irregularities, It is provided for the purpose of preventing the deterioration of the characteristics caused by the local strain due to the stress difference in the oxide superconducting wire due to the bending and extension of the cable.

【0013】線材編成物は、その被覆層が螺旋管又はコ
ルゲート管における表面凹凸のバッファ層として機能し
てケーブルフォーマーに螺旋状に設ける酸化物超電導線
に局所歪を発生させないものが好ましく、従って螺旋管
又はコルゲート管における表面凹凸の大きさ等により適
宜な厚さを有するものが用いられる。また必要に応じて
用いられるポリマーフィルム層などを含めて螺旋状に設
ける酸化物超電導線に対して滑らかな表面のケーブルフ
ォーマーであることが好ましく、従って螺旋状に設ける
酸化物超電導線の断面寸法などに応じて適宜な隙間を有
するものなども用いうる。
The knitted wire material is preferably one in which the coating layer functions as a buffer layer for the uneven surface of the spiral tube or corrugated tube and does not cause local strain in the oxide superconducting wire provided in a spiral shape in the cable former. A spiral tube or corrugated tube having an appropriate thickness depending on the size of the surface irregularities is used. In addition, it is preferable that the cable former has a smooth surface with respect to the oxide superconducting wire provided in a spiral shape including the polymer film layer used as necessary. Therefore, the cross-sectional dimension of the oxide superconducting wire provided in a spiral shape is preferable. For example, a material having an appropriate gap may be used.

【0014】線材編成物としては、ステンレス、銀、銅
の如き金属、ポリイミド、ポリエステル、フッ素樹脂の
如きプラスチック、ガラスの如きセラミック等からなる
繊維やリボン等の線材、あるいはカーボン繊維等を織物
状やネット状ないし網代状あるいは不織布状等の適宜な
形態に編成した物などを用いることができる。
As the wire rod knitted material, fibers made of metal such as stainless steel, silver, copper, polyimide, polyester, plastics such as fluororesin, ceramics such as glass, wire rods such as ribbons, or carbon fibers are woven or woven. It is possible to use a material knitted in an appropriate shape such as a net shape, a mesh-like shape or a non-woven shape.

【0015】線材編成物からなる被覆層の上に設けられ
ることのあるポリマーフィルム層は、表面がより滑らか
なケーブルフォーマーを得ることを目的に設けられる。
ポリマーフィルム層は、例えば線材編成物からなる被覆
層の外周にポリマーからなるテープ状やシート状等のフ
ィルムを隙間なく巻回して被覆する方式などにより形成
することができる。ポリマーフィルムとしては、例えば
ポリエステルやポリイミド、就中、滑り性や耐低温脆化
性の良好なフッ素樹脂などからなるものが好ましく用い
うる。なおポリマーフィルム層又は/及び線材編成物層
は、酸化物超電導線からなる素線を重畳させて多層巻構
造とする場合には、その層間にも設けることができる。
The polymer film layer which may be provided on the covering layer made of the braided wire material is provided for the purpose of obtaining a cable former having a smoother surface.
The polymer film layer can be formed, for example, by a method in which a tape-shaped or sheet-shaped film made of a polymer is wound around the outer periphery of a coating layer made of a knitted wire material without a gap, and the like. As the polymer film, for example, a film made of polyester or polyimide, and above all, a fluororesin having good slipperiness and low temperature embrittlement resistance can be preferably used. The polymer film layer and / or the wire knitted material layer may be provided between the layers when the strands of oxide superconducting wire are superposed to form a multi-layer winding structure.

【0016】酸化物超電導ケーブルの形成は、例えば直
線状等の酸化物超電導線をケーブルフォーマーの外周に
螺旋巻することにより行うこともできるし、予め螺旋状
の酸化物超電導線からなる素線を形成してそれをケーブ
ルフォーマーの外周に装着する方式などによっても行う
ことができる。前者は、フォーマーに酸化物超電導線を
密着性よく巻回できて緩み等による超電導特性の低下の
防止に有利であり、後者はフォーマーへの螺旋巻装着に
よる曲げ歪の発生を防止できて臨界電流等の超電導特性
に優れるケーブルの形成に有利であり、またフォーマー
への巻回処理の回避でその巻回処理によるクラックの発
生等の問題が回避され、より外径の小さいフォーマーの
使用が可能となってコンパクトなケーブルの形成に有利
である。なお酸化物超電導ケーブルは、1層あたり10
〜15本程度の素線を平行に螺旋巻したものが一般的で
あるが、これに限定されない。
The oxide superconducting cable can be formed, for example, by spirally winding a linear oxide superconducting wire around the outer periphery of the cable former, or by previously forming a strand of the spiral oxide superconducting wire. It can also be carried out by a method of forming the above and mounting it on the outer circumference of the cable former. The former is advantageous in preventing the deterioration of superconducting properties due to looseness, etc. because the oxide superconducting wire can be wound around the former with good adhesiveness, and the latter can prevent the occurrence of bending strain due to the spiral winding mounting on the former and thus the critical current. It is advantageous for forming cables with excellent superconducting properties, and avoiding the winding process on the former avoids problems such as cracking due to the winding process, and it is possible to use a former with a smaller outer diameter. This is advantageous for forming a compact cable. The oxide superconducting cable is 10 per layer.
Generally, about 15 to 15 strands are spirally wound in parallel, but the present invention is not limited to this.

【0017】前記した酸化物超電導線からなる螺旋状の
素線は、例えば金属シースを有する酸化物超電導系より
線素材をケーブルフォーマーに螺旋巻する際の曲げ歪量
の0.1%以内の曲げ歪量差で耐熱管の外周に螺旋状に
巻回し、それを加熱処理する方法などにより製造するこ
とができる。
The above-mentioned spiral element wire made of an oxide superconducting wire has a bending strain amount of 0.1% or less when the wire material of an oxide superconducting system having a metal sheath is spirally wound on a cable former. It can be manufactured by, for example, a method of spirally winding the heat-resistant tube around the outer circumference of the heat-resistant tube due to the difference in bending strain, and heat-treating it.

【0018】耐熱管の外周に螺旋状に巻回する、金属シ
ースを有する酸化物超電導系より線素材は、超電導層の
焼結を終えて酸化物超電導線としたものであってもよい
が、一般には焼結処理前の金属シース内部の酸化物超電
導体が粉末状態にあるもの、あるいはそれを予備焼結し
それにプレス処理を施して、形成された超電導層を砕い
た状態のものなどである。前記プレス処理は、品質の安
定化や向上を目的としたもので、必要に応じ2回以上施
され、その場合には通常、前後のプレス処理間に加熱工
程が設けられる。
The oxide superconducting stranded wire material having a metal sheath, which is spirally wound around the outer periphery of the heat resistant tube, may be an oxide superconducting wire obtained by finishing the sintering of the superconducting layer. Generally, the oxide superconductor inside the metal sheath before sintering is in a powder state, or it is the state in which the formed superconducting layer is crushed by pre-sintering it and pressing it. . The press treatment is intended to stabilize or improve the quality, and is performed twice or more if necessary, and in that case, a heating step is usually provided between the press treatment before and after the press treatment.

【0019】前記のより線素材は、金属シースを有する
酸化物超電導線ないしその形成素材の単芯物からなって
いてもよいし、単線を適宜な方式で多芯化してなる複合
物などであってもよい。より線素材の形態は、幅2〜5
mm、厚さ0.1〜0.3mm程度のテープ状ないし平角状
等の扁平形態が一般的であるが、丸線形態、さらにはそ
の他の多角形形態などの適宜な断面形態を有していても
よい。
The stranded wire material may be made of an oxide superconducting wire having a metal sheath or a single core material of the oxide superconducting wire, or a composite material obtained by making the single wire multicore by an appropriate method. May be. The stranded wire material has a width of 2 to 5
In general, a flat shape such as a tape shape or a rectangular shape having a thickness of about 0.1 mm and a thickness of 0.1 to 0.3 mm is used, but it has an appropriate cross-sectional shape such as a round wire shape and other polygonal shapes. May be.

【0020】前記のより線素材の形成は、例えば酸化物
超電導体の粉末を金属チューブに充填し、それをダイス
やピンチロール等の適宜な伸線手段や圧延手段、スウェ
ージング手段で細線長尺化処理ないし扁平化処理、鍛造
処理する方式などの任意な方式で行うことができる。前
記の金属チューブが加工を経て金属シースとなる。多芯
化線は、例えば複数の線材を金属チューブに充填しそれ
を細線ないし扁平化して複合化する処理を必要に応じて
複数回繰り返す方式などにより得ることができる。なお
用いる酸化物超電導体粉末の粒径は、100μm以下、
就中0.1〜10μmが一般的であり、その粉末は例えば
酸化物超電導体の焼結体を粉砕する方式などにより得る
ことができる。
The formation of the above-mentioned stranded wire material is carried out, for example, by filling an oxide superconductor powder into a metal tube, and using a suitable wire drawing means such as a die or pinch roll, a rolling means, and a swaging means to make a thin long wire. It can be performed by an arbitrary method such as a method of flattening, flattening, or forging. The metal tube is processed into a metal sheath. The multifilamentary wire can be obtained by, for example, a method of filling a plurality of wires into a metal tube and thinning or flattening the metal tube to form a composite, which is repeated a plurality of times as necessary. The particle size of the oxide superconductor powder used is 100 μm or less,
In general, it is generally 0.1 to 10 μm, and the powder can be obtained by, for example, a method of pulverizing a sintered body of an oxide superconductor.

【0021】酸化物超電導系より線素材における金属シ
ースの形成材としては、例えば銀、金、白金、ステンレ
ス、銀・マグネシウム合金の如きかかる金属を含有する
合金、就中、銀・白金合金、銀・パラジウム合金の如き
高融点合金などからなる貴金属系のものが一般的である
が、これに限定されない。
As the material for forming the metal sheath in the oxide superconducting stranded wire material, for example, silver, gold, platinum, stainless steel, alloys containing such metals such as silver-magnesium alloys, especially silver-platinum alloys, silver -A noble metal-based material such as a high melting point alloy such as a palladium alloy is generally used, but is not limited thereto.

【0022】金属シース内部の酸化物超電導体を形成す
る成分の種類については特に限定はない。その例として
は、Bi2Sr2CaCu2yやBi2-xPbxSr2Ca2Cu3y
の如きBi系酸化物超電導体、YBa2Cu3yやYBa2
u4yの如きY系酸化物超電導体、Ba1-xxBiO3の如
きBa系酸化物超電導体、Nd2-xCexCuOyの如きNd系
酸化物超電導体、Tl2Ba2Ca2Cu3yの如きTl系酸化
物超電導体、その他La系酸化物超電導体、Pb系酸化物
超電導体などがあげられる。
There is no particular limitation on the type of components forming the oxide superconductor inside the metal sheath. Examples thereof include Bi 2 Sr 2 CaCu 2 O y and Bi 2-x Pb x Sr 2 Ca 2 Cu 3 O y.
Bi-based oxide superconductors such as YBa 2 Cu 3 O y and YBa 2 C
Y-based oxide superconductors such as u 4 O y , Ba - based oxide superconductors such as Ba 1-x K x BiO 3 , Nd - based oxide superconductors such as Nd 2-x Ce x CuO y , Tl 2 Ba Examples include Tl-based oxide superconductors such as 2 Ca 2 Cu 3 O y , other La-based oxide superconductors, Pb-based oxide superconductors, and the like.

【0023】また、前記のBi等の成分を他の希土類元
素で置換したもの、Sr等の成分を他のアルカリ土類金
属で置換したもの、あるいはO成分をFなどで置換した
ものなどもあげられる。さらに、ピンニングセンターを
含有させたものなどもあげられる。ピンニングセンター
含有の酸化物超電導体は、そのピンニングセンターによ
る磁束のピン止め効果により、高い磁場下においても大
きな臨界電流密度を示す利点を有する。ピンニングセン
ター含有の酸化物超電導体は、例えばMPMG法(Melt
Powdering Melt Growth)などにより得ることができ
る。
Further, the above-mentioned components such as Bi are substituted with other rare earth elements, the components such as Sr are substituted with other alkaline earth metals, and the O components are substituted with F and the like. To be Furthermore, the thing containing the pinning center etc. is mentioned. The pinning center-containing oxide superconductor has the advantage of exhibiting a large critical current density even under a high magnetic field due to the effect of pinning the magnetic flux by the pinning center. The oxide superconductor containing the pinning center is, for example, the MPMG method (Melt
Powdering Melt Growth) and the like.

【0024】上記の螺旋状素線の形成に用いる耐熱管
は、加熱処理後に得られた素線をそれより取外しうるよ
うにすることを目的とし、従って加熱処理で酸化物超電
導系より線素材と接着して分離不能とならないアルミナ
の如きセラミックからなる管や、セラミックで被覆した
ステンレス管等の被覆管などの適宜なものからなってい
てよい。なお素線の取外しを容易とするために耐熱管
は、組立式の割型などとして形成されていてもよい。
The heat-resistant tube used for forming the above-mentioned spiral element wire is intended to allow the element wire obtained after the heat treatment to be removed therefrom, and therefore, the heat-resistant tube is made of the oxide superconducting stranded wire material by the heat treatment. The tube may be made of a suitable material such as a tube made of ceramic such as alumina that does not become inseparable by adhesion, or a coated tube such as a stainless steel tube coated with ceramic. The heat-resistant tube may be formed as an assembled split mold or the like to facilitate the removal of the wire.

【0025】耐熱管外周への酸化物超電導系より線素材
の巻回条件は、使用対象のケーブルフォーマーに対して
螺旋巻する際の曲げ歪量の0.1%以内、就中0.05
%以内の曲げ歪量差の螺旋巻条件が好ましい。その曲げ
歪量差が0.1%を超えるとケーブルフォーマーに適用
した場合の超電導特性の低下が大きい場合がある。
The winding condition of the oxide superconducting stranded wire around the heat-resistant tube is within 0.1% of the bending strain when spirally wound around the cable former to be used, preferably 0.05.
A spiral winding condition with a bending strain difference of less than 100% is preferable. If the difference in the amount of bending strain exceeds 0.1%, the superconducting property may be largely deteriorated when applied to a cable former.

【0026】なお前記の曲げ歪量(ε)は、式:ε=t
・cos2β/2rより求めることができる。なお、tは酸
化物超電導系より線素材の厚さ、rは耐熱管又はケーブ
ルフォーマーの外径に基づく半径、βは耐熱管又はケー
ブルフォーマーに対する螺旋巻の角度である。
The bending strain amount (ε) is calculated by the equation: ε = t
・ Can be calculated from cos 2 β / 2r. Note that t is the thickness of the oxide superconducting stranded wire material, r is the radius based on the outer diameter of the heat resistant tube or cable former, and β is the angle of spiral winding with respect to the heat resistant tube or cable former.

【0027】従って前記の曲げ歪量差を満足させつつ素
線を効率よく形成する点よりは、使用対象のケーブルフ
ォーマーよりも直径の大きい耐熱管を用いて、それに酸
化物超電導系より線素材を狭いピッチ(密)で螺旋巻す
ることが有利である。ただしその螺旋巻は、加熱処理時
により線素材が相互に接着しないよう重ね巻は避けられ
る。なお螺旋巻のピッチ(P)と角度(β)の関係は、
式:cosβ=2r/√(4r2+P2/4)で表される。
Therefore, from the viewpoint of efficiently forming the strands while satisfying the above-mentioned difference in bending strain, a heat-resistant tube having a diameter larger than that of the cable former to be used is used, and an oxide superconducting stranded wire material is used. It is advantageous to spirally wind the with a narrow pitch. However, in the spiral winding, lap winding is avoided so that the wire materials do not adhere to each other during the heat treatment. The relationship between the pitch (P) and the angle (β) of the spiral winding is
Formula represented by cosβ = 2r / √ (4r 2 + P 2/4).

【0028】なお前記において、素線はケーブルフォー
マー外周に2層以上の重畳層として設けうるものである
ことから、2層目以上となる素線を形成する場合には、
ケーブルフォーマーに1層目又は2層目等の下層となる
より線層を設けた状態の外径に基づいて曲げ歪量差が決
定される。
In addition, in the above, since the strands can be provided as a superposed layer of two or more layers on the outer circumference of the cable former, when the strands of the second layer or more are formed,
The bending strain amount difference is determined based on the outer diameter of the cable former in which the stranded wire layer serving as the lower layer such as the first layer or the second layer is provided.

【0029】耐熱管の外周に酸化物超電導系より線素材
を所定の曲げ歪量で螺旋巻したものの加熱処理は、焼結
状態の超電導層を有する酸化物超電導線からなる螺旋状
の素線の形成を目的とする。従って加熱条件は、酸化物
超電導体の種類に応じて従来に準じ適宜に決定すること
ができる。一般には700〜1200℃の温度で加熱処
理される。
The heat treatment of the spirally wound oxide superconducting wire material with a predetermined bending strain amount on the outer periphery of the heat-resistant tube is carried out by heating the spiral superconducting wire having an oxide superconducting wire having a sintered superconducting layer. Intended for formation. Therefore, the heating conditions can be appropriately determined according to the conventional type according to the type of oxide superconductor. Generally, heat treatment is performed at a temperature of 700 to 1200 ° C.

【0030】得られた螺旋状の素線は、耐熱管より取り
外され、所定のケーブルフォーマーに装着されて目的の
酸化物超電導ケーブルとされる。その場合、素線は単相
巻きであってもよいし、多層巻であってもよい。多層巻
としては20層以下、就中4〜10層が一般的であるが
これに限定されない。電力ケーブルを得る場合には、送
電ロスを低減する点より1000A以上の送電能力をも
たせることが好ましく、その場合には多層巻構造とする
ことが一般的である。なお多層巻構造とする場合、素線
のスパイラル方向を上下で逆転させることがケーブルの
可撓性の向上の点より有利である。
The obtained spiral strand is removed from the heat resistant tube and mounted on a predetermined cable former to obtain an intended oxide superconducting cable. In that case, the wire may be single-phase winding or multi-layer winding. As the multi-layer winding, 20 layers or less, especially 4 to 10 layers are common, but not limited to this. When obtaining an electric power cable, it is preferable to have a power transmission capacity of 1000 A or more from the viewpoint of reducing power transmission loss. In that case, a multilayer winding structure is generally used. In the case of a multi-layer winding structure, it is advantageous to reverse the spiral direction of the wire up and down in order to improve the flexibility of the cable.

【0031】実施例1 Bi1.7Pb0.3Sr2Ca2Cu3y系酸化物超電導体の粒径
0.1〜10μmの粉末を、肉厚1.0mm、直径7.0mmの
銀チューブに充填し、それをピンチロールで圧延して幅
3mm、厚さ0.2mm(超電導部の厚さ100μm)のテー
プ体に加工した後、そのテープ体を直線状態で820〜
860℃で約50時間加熱処理して酸化物超電導線を得
た。
Example 1 Powder of Bi 1.7 Pb 0.3 Sr 2 Ca 2 Cu 3 O y type oxide superconductor having a particle size of 0.1 to 10 μm was filled in a silver tube having a thickness of 1.0 mm and a diameter of 7.0 mm. Then, after rolling it with a pinch roll to form a tape body with a width of 3 mm and a thickness of 0.2 mm (thickness of the superconducting portion is 100 μm), the tape body is straightened to 820 to 820.
Heat treatment was performed at 860 ° C. for about 50 hours to obtain an oxide superconducting wire.

【0032】次に前記の酸化物超電導線を、幅5mm、厚
さ2mmの銅板を2mmの隙間を設けつつ筒状に螺旋巻して
なる外径20mmの螺旋管の外周を線材編成物で被覆した
ものからなるケーブルフォーマーの外周に50mmピッチ
で螺旋巻して1層目を形成し、ついでその上にスパイラ
ル方向を逆転させて2層目を形成して長さ約400mmの
酸化物超電導ケーブルを得た。なお1層目及び2層目の
形成には、それぞれ20本の酸化物超電導線を用いた。
従って合計40本の酸化物超電導線がケーブルフォーマ
ーの外周に巻回する。また前記の線材編成物としては直
径0.2mmのステンレス線を1mmピッチでネット状に編
成した網代を用い、それを1層重ね巻したもので被覆層
を形成した。
Next, the oxide superconducting wire is covered with a wire material on the outer periphery of a spiral tube having an outer diameter of 20 mm, which is formed by spirally winding a copper plate having a width of 5 mm and a thickness of 2 mm in a cylindrical shape with a gap of 2 mm. The outer circumference of the cable former consisting of the above is spirally wound at a pitch of 50 mm to form the first layer, and then the spiral direction is reversed to form the second layer to form an oxide superconducting cable with a length of about 400 mm. Got 20 oxide superconducting wires were used for forming the first layer and the second layer, respectively.
Therefore, a total of 40 oxide superconducting wires are wound around the outer circumference of the cable former. Further, as the above-mentioned wire material knit, a netting formed by knitting a stainless wire having a diameter of 0.2 mm in a net shape at a pitch of 1 mm was used.

【0033】実施例2 テープ体を外径50mmのアルミナ管の外周に5mmピッチ
で螺旋巻し、それを820〜860℃で約50時間加熱
処理して酸化物超電導線からなる螺旋状の素線を得た。
次に前記の素線をアルミナ管より可及的に曲げ応力がか
からないよう取外し、それを実施例1に準じたケーブル
フォーマーの外周に可及的に曲げ応力がかからないよう
装着して酸化物超電導ケーブルを得た。
Example 2 A tape body was spirally wound on the outer circumference of an alumina tube having an outer diameter of 50 mm at a pitch of 5 mm and heat-treated at 820 to 860 ° C. for about 50 hours to form a spiral strand of oxide superconducting wire. Got
Next, the above-mentioned wire was removed from the alumina tube so that bending stress was not applied as much as possible, and it was attached to the outer periphery of the cable former according to Example 1 so that bending stress was not applied as much as possible. Got the cable.

【0034】実施例3 螺旋管に代えて、高さと幅が5mmの凸部を20mmピッチ
で有する外径20mm、肉厚1mmのステンレス製コルゲー
ト管を使用し、線材編成物の被覆層の上に厚さ80μm
のカプトンテープを隙間なく巻きつけてなるケーブルフ
ォーマーを用いたほかは実施例2に準じて酸化物超電導
ケーブルを得た。
Example 3 Instead of the spiral tube, a stainless corrugated tube having an outer diameter of 20 mm and a wall thickness of 1 mm having a height and a width of 5 mm at a pitch of 20 mm was used. 80 μm thickness
An oxide superconducting cable was obtained in the same manner as in Example 2 except that the cable former formed by winding the Kapton tape of 1. was used without gaps.

【0035】比較例 ケーブルフォーマーに隙間のない通例形態の肉厚2mmの
銅パイプを用いたほかは実施例1に準じて酸化物超電導
ケーブルを得た。
Comparative Example An oxide superconducting cable was obtained in the same manner as in Example 1 except that a copper pipe having a wall thickness of 2 mm and having a regular shape with no gap was used for the cable former.

【0036】評価試験 可撓性 実施例、比較例で得たケーブルを10cmに切り出し、そ
の片側を支持して他端に10kgの荷重を付加した場合
に、その他端での撓み量を調べた。
Evaluation Test Flexibility The cables obtained in Examples and Comparative Examples were cut into 10 cm, and when one end was supported and a load of 10 kg was applied to the other end, the amount of bending at the other end was examined.

【0037】超電導特性 実施例、比較例で得たケーブルを液体窒素で冷却し、そ
の直線状態の場合と直径1mの曲げ状態の場合における
臨界電流を調べた。
Superconducting Properties The cables obtained in Examples and Comparative Examples were cooled with liquid nitrogen, and the critical currents in the linear state and the bent state with a diameter of 1 m were examined.

【0038】前記の結果を次表に示した。 The above results are shown in the following table.

【0039】[0039]

【発明の効果】本発明の酸化物超電導ケーブルは、低温
冷却時における臨界電流等の超電導特性に優れ、かつ良
好な可撓性を示して敷設作業性に優れている。
The oxide superconducting cable of the present invention is excellent in superconducting properties such as critical current when cooled at low temperature, exhibits good flexibility, and is excellent in laying workability.

【図面の簡単な説明】[Brief description of drawings]

【図1】 実施例の説明側面図。FIG. 1 is an explanatory side view of an embodiment.

【図2】 他の実施例の説明側面図。FIG. 2 is an explanatory side view of another embodiment.

【符号の説明】[Explanation of symbols]

1:螺旋管からなるケーブルフォーマー 2:線材編成物からなる被覆層 3,4:酸化物超電導線からなる螺旋状の素線 5:コルゲート管からなるケーブルフォーマー 1: Cable former made of spiral tube 2: Cover layer made of wire knitted material 3, 4: Spiral element wire made of oxide superconducting wire 5: Cable former made of corrugated tube

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 線材編成物で被覆した螺旋管又はコルゲ
ート管からなるケーブルフォーマーの外周に、金属シー
スを有する酸化物超電導線からなる螺旋状の素線を有す
ることを特徴とする酸化物超電導ケーブル。
1. An oxide superconducting wire, which comprises a spiral former made of an oxide superconducting wire having a metal sheath on the outer circumference of a cable former made of a spiral tube or a corrugated tube covered with a braided wire. cable.
【請求項2】 線材編成物の被覆層の上にポリマーフィ
ルム層を有するケーブルフォーマーを用いてなる請求項
1に記載の酸化物超電導ケーブル。
2. The oxide superconducting cable according to claim 1, which comprises a cable former having a polymer film layer on a coating layer of a wire rod composition.
JP5281666A 1993-10-14 1993-10-14 Oxide superconducting cable Pending JPH07114838A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5281666A JPH07114838A (en) 1993-10-14 1993-10-14 Oxide superconducting cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5281666A JPH07114838A (en) 1993-10-14 1993-10-14 Oxide superconducting cable

Publications (1)

Publication Number Publication Date
JPH07114838A true JPH07114838A (en) 1995-05-02

Family

ID=17642288

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5281666A Pending JPH07114838A (en) 1993-10-14 1993-10-14 Oxide superconducting cable

Country Status (1)

Country Link
JP (1) JPH07114838A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004158448A (en) * 2002-10-23 2004-06-03 Nexans Superconductors Gmbh Superconducting cable conductor having rebco-coated conductor element
JP2012094542A (en) * 2012-01-19 2012-05-17 Sumitomo Electric Ind Ltd Superconducting cable and connection part of superconducting cable
JP5967752B2 (en) * 2009-10-07 2016-08-10 国立大学法人九州工業大学 Superconducting cable and AC transmission cable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004158448A (en) * 2002-10-23 2004-06-03 Nexans Superconductors Gmbh Superconducting cable conductor having rebco-coated conductor element
JP5967752B2 (en) * 2009-10-07 2016-08-10 国立大学法人九州工業大学 Superconducting cable and AC transmission cable
JP2012094542A (en) * 2012-01-19 2012-05-17 Sumitomo Electric Ind Ltd Superconducting cable and connection part of superconducting cable

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