JPS6166380A - Connecting structure of forcibly cooled superconductive conductor - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 「産業上の利用分野」 この発明は該融合炉等の超電導マグネットの超電導コイ
ルに使用される超電導導体の接続４ｆ４迄に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to connections up to 4f4 of superconducting conductors used in superconducting coils of superconducting magnets in fusion reactors and the like.

［従来技術とその問題点」 最近に至り、断面中央に冷却媒体通路を形成したいわゆ
る中空超電導導体を用い、冷却媒体通路に超臨界圧ヘリ
ウム等の冷部媒体を強制循環させて超電導線をその内側
から強制冷却するようにした超電導コイルが種々提案さ
れｋいる。このような超電導コイルに使用される中空超
電導導体としては、例えば第９図に示す第１の従来例の
ように、中央に冷却媒体通路１を形成した断面矩形状の
銅製等の安定化母材２の壁面内に超電導素線３Ａが埋め
込まれた型式のもの、さらには、第１０図に示す第２の
従来例のように断面矩形状の安定化母材２の外面に凹溝
４が形成されるとともに各凹溝４に成形超電導素線３Ｃ
が嵌合固定され何形式のもの等がある。[Prior art and its problems] Recently, a so-called hollow superconducting conductor with a cooling medium passage formed in the center of its cross section has been used, and a superconducting wire is made by forcing a cooling medium such as supercritical pressure helium to circulate in the cooling medium passage. Various superconducting coils have been proposed that are forced to cool from the inside. As a hollow superconducting conductor used in such a superconducting coil, for example, as in the first conventional example shown in FIG. In addition, as in the second conventional example shown in FIG. 10, grooves 4 are formed on the outer surface of the stabilizing base material 2 having a rectangular cross section. At the same time, superconducting strands 3C are formed in each groove 4.
There are several types of fittings and fixings.

上記第９図と第１０図に示すような超電導導体の接続構
造の一例として、第１１図に示す第３の従来例のように
、対向させた一対の超電Ｓ４体５゜６の端部どうしがパ
イプ７を介して突き合わされ、各端部とパイプ７が半田
付けされるとともに、超電導導体５の端部からパイプ７
を介して超電導導体６の端部にかけてＮｂ　ＴＬ、　Ｎ
ｂ　３３ｎ製等の超電導線８が巻き掛【ノられて成るも
のが知られている。As an example of the connection structure of superconducting conductors as shown in FIGS. 9 and 10 above, as in the third conventional example shown in FIG. They are butted together via the pipe 7, and each end and the pipe 7 are soldered, and the pipe 7 is connected from the end of the superconducting conductor 5.
Nb TL, N to the end of the superconducting conductor 6 through
It is known that a superconducting wire 8 made of 33n or the like is wound around the wire.

ところが、第１１図に示す接続構造にあっては、パイプ
７による冷媒の流路の確保や超電導線８による電気的接
続がなされてはいるものの、超電導線８と冷媒の流路が
離れて間接冷却なっているので、冷却効率が低く、その
ため何らかの原因で超電導線８の一部にと一トスポット
が生じて超電導特性が失われた場合に、その回復が遅れ
る問題がある。また、第１１図に示す第３の従来の接続
構造では、超電導線を冷媒の流路内に設けた直接冷１６
１式の超電導導体においては、超電導線の電気的な接続
が回動になる欠点がある。However, in the connection structure shown in FIG. 11, although the refrigerant flow path is secured by the pipe 7 and the electrical connection is made by the superconducting wire 8, the superconducting wire 8 and the refrigerant flow path are separated and indirect. Since the superconducting wire 8 is being cooled, the cooling efficiency is low, and therefore, if a spot occurs in a part of the superconducting wire 8 for some reason and the superconducting properties are lost, there is a problem that the recovery will be delayed. In addition, in the third conventional connection structure shown in FIG.
One set of superconducting conductors has the disadvantage that the electrical connection of the superconducting wires is rotational.

一方、超電導素線を捻り合わせて構成した超電導線の一
般的な接続構造として第１２図ないし第１５図にポリ−
各種の構造が知られている。第１２図に示す第４の従来
の構造は、超電導線１０．１１の各々の端部が２層に分
けられ、−ｍどうしが違いちがいに重ねて突き合わされ
、半田付けされた構造である。第１３図に示す第５の従
来の構造は、超電導線１２．１３の各端面が突き合わさ
れ、突き合わせ部分が半田付けされた構造である。第１
４図に示す第６の従来の構造は、撚線化された超電導線
１４．１５を構成する超電導素線１４ａ。On the other hand, as a general connection structure for a superconducting wire constructed by twisting superconducting strands, the poly-
Various structures are known. A fourth conventional structure shown in FIG. 12 is a structure in which the ends of each superconducting wire 10, 11 are divided into two layers, and the layers -m are stacked and butted against each other with different layers, and are soldered. A fifth conventional structure shown in FIG. 13 is a structure in which the end faces of superconducting wires 12 and 13 are butted against each other, and the abutted portions are soldered. 1st
A sixth conventional structure shown in FIG. 4 includes superconducting strands 14a constituting stranded superconducting wires 14 and 15.

１５ａが１本ずつ相互の端面どうし半田付けされた構造
である。第１５図に示す第７の従来の構造は、超電導線
’１６．１７の端部どうしが突き合わされるとともに、
超電導素線を撚って成形したテープ状の超電導片１８．
１９が超電導線１６，１７の端部下面と端部下面にまた
がった状態で半田付けされた構造である。15a are each soldered to each other's end faces. In the seventh conventional structure shown in FIG. 15, the ends of the superconducting wires are butted against each other, and
Tape-shaped superconducting piece formed by twisting superconducting wires 18.
19 is a structure in which the superconducting wires 16 and 17 are soldered while straddling the lower surfaces of the ends.

ところが、上記した各構造にあっては、以下に述べるよ
うな欠点を有していた。第１２図に示す構造にあっては
、ＨＡ電導線１０．１１の重なる部分の長さが大きくと
れないために、電気的接続に問題を生じ、第１３図に示
す構造にあっては、超電導線１２．１３の端面どうしの
接続のために、電気的、機械的（法統強度の面）、いず
れの面においても接続不充分であり、第１４図に示す構
造にあっては、超電導素線１４ａ、１５ａの各々１本ず
つの接続のために接続強度が弱く、超電導コイルの発生
させる電磁力によって超電導線１４゜１５が動いた際に
接続部が損１期を受ける虞れがあり、第１５図に示す構
造にあっては、接続部が他の部分より大きくなってしま
う問題があった。However, each of the above structures had the following drawbacks. In the structure shown in Fig. 12, the length of the overlapping portion of the HA conductive wires 10 and 11 cannot be made large, which causes problems in electrical connection, and in the structure shown in Fig. 13, superconducting Due to the connection between the end faces of wires 12 and 13, the connection is insufficient in both electrical and mechanical (legal strength) aspects, and in the structure shown in Fig. 14, superconducting strands The connection strength is weak due to the connection of one wire each of 14a and 15a, and when the superconducting wires 14 and 15 move due to the electromagnetic force generated by the superconducting coil, there is a risk that the connected portion will suffer a loss. The structure shown in FIG. 15 has a problem in that the connecting portion is larger than other portions.

「発明の目的」 この発明は、上述した事情に鑑みでなされたもので、冷
媒による冷却効、果が高く、電気的にも充分な接続で、
かつ、機械強度が高いとともに、接続部の遮蔽も充分な
強制冷却超電導導体の接続構造の提供を目的とする。``Object of the Invention'' This invention was made in view of the above-mentioned circumstances.
Another object of the present invention is to provide a connection structure for forced cooling superconducting conductors that has high mechanical strength and has sufficient shielding of the connection portion.

「問題点を解決するための手段」 この発明は、外被の端部から露出した超電導線を一層以
上ごとに重ね合わせてろう付【ノし、このろう付けされ
た超電導線の外面にスペーサ部材を固定し、外被の端部
間の超電導線とスペーサ部材とをジヨイントカバーで気
密に覆い、ジヨイントカバーの端部の各々を上記外被の
端部に接合して外被の端部どうしを連結してなるもので
ある。``Means for Solving the Problems'' This invention involves overlapping and brazing the superconducting wires exposed from the end of the outer sheath one layer at a time, and then attaching a spacer member to the outer surface of the brazed superconducting wires. is fixed, the superconducting wire and the spacer member between the ends of the outer sheath are airtightly covered with a joint cover, each of the ends of the joint cover is joined to the end of the outer sheath, and the ends of the outer sheath are fixed. It is made by connecting things together.

「作用」 超電導線どうしは重なり合って長い部分でろう接して電
気的に充分に接続するとともに接合強度を向上させ、ス
ペーサ部材は外被内の流路を流れる冷媒を円滑に流し、
カバ一部材は超電導線とスペーサ部材と外被の端部とを
覆ってこれらと外被外方との遮断をなすとともに外被ど
うしを強固に接合する。``Function'' The superconducting wires overlap each other and are soldered together at their long parts to make a sufficient electrical connection and improve the bonding strength.The spacer member allows the refrigerant to flow smoothly through the channel inside the jacket.
The cover member covers the superconducting wire, the spacer member, and the end of the jacket to isolate them from the outside of the jacket and firmly joins the jackets together.

「実施例」 第１図ないし第４図はこの発明の一実施例を示すもので
、図中２０．２１はこの実施例の接合構造によって接続
された超電導導体を示している。Embodiment FIGS. 1 to 4 show an embodiment of the present invention, and in the figures, reference numerals 20 and 21 indicate superconducting conductors connected by the joining structure of this embodiment.

上記超電導導体２０（あるいは２１）は、第３図に示ず
ように、超電導素線２０ａ　　（あるいは２１ａ）・・
・をテープ状に捻って多層化して成形された超電導線２
０Ａ（あるいは２１Ａ）と、この超電導線２０△（ある
いは２１Ａ）を収納した横断面略矩形状の安定化母材２
０Ｂ（あるいは２１Ｂ）と、この安定化母材２０Ｂ（あ
るいは２１Ｂ）を収納した横断面略矩形状の外被２０Ｃ
（あるいは２１Ｃ）とを主体として構成されたものであ
る。As shown in FIG. 3, the superconducting conductors 20 (or 21) are superconducting strands 20a (or 21a)...
・Superconducting wire 2 formed by twisting into a tape shape and forming multiple layers
0A (or 21A) and a stabilizing base material 2 with a substantially rectangular cross section that accommodates this superconducting wire 20Δ (or 21A).
0B (or 21B) and an outer cover 20C with a substantially rectangular cross section that houses the stabilizing base material 20B (or 21B).
(or 21C).

なお、安定化母材２ＯＢ　（あるいは２１Ｂ）の外面に
は安定化母材２０Ｂ（あるいは２１Ｂ）の長さ方向に沿
って突条部２０ｂ　　（あるいは２１ｂ）が形成されて
いて、これら突条部２０ｂ（あるいは２１ｂ）を外被２
０Ｃ（あるいは２１Ｇ）の内面に当接させて安定化母材
２０Ｂ（あるいは２１Ｂ）が外被２０ｃ　　（あるいは
２１Ｃ）内に収納され、安定化母材２ＯＢ　（あるいは
２１Ｂ）と外被２０Ｃ（あるいは２１Ｃ）との間には冷
却媒体の流路Ｓ＋　　（あるいはＳ２）が形成されてい
る。Incidentally, protrusions 20b (or 21b) are formed on the outer surface of the stabilizing base material 2OB (or 21B) along the length direction of the stabilizing base material 20B (or 21B), and these protrusions 20b (or 21b) with outer cover 2
The stabilizing base material 20B (or 21B) is housed in the outer sheath 20c (or 21C) in contact with the inner surface of 0C (or 21G), and the stabilizing base material 2OB (or 21B) and the outer sheath 20C (or 21C) ) is formed with a cooling medium flow path S+ (or S2).

上記超電導導体２０．２１の外被２０ｃ　、２０Ｃの端
部２０ｄ、２０ｄからは、各々超電導線２０Ａ、２１Ａ
が所定長さ露出され、露出された超電導線２ＯＡ、２１
Ａの半分程度が各々の厚さ方向に沿う上下２層に分割さ
れて第４図に示すように交互に重ねられ、重ねられた部
分全部か半田付けされている。また、上記のように重ね
られた超電導線２０Ａ、２１Ａの上下両面には、横断面
楕円状或いは矩形状のスペーサパイプ（スペーサ部材）
２２が、その端部の開口面を上記外被２０Ｇ（あるいは
２１Ｃ）の流路Ｓ＋　　（あるいはＳ２　）の開口部に
臨ませて、半田あるいは銀ロウ等によりろう付けされて
いる。（或いはステンレスｖＡ線などによるバインドに
よって固定されることもある。）なお、スペーサパイプ
２２を構成する材料は、銅、銅合金、ステンレス鋼、ア
ルミニウム、アルミニウム合金等の金属材料或いはＦＲ
Ｐ等の非金属材料が用いられる。そして、上記外被２０
ｃ、２１０の端部２０ｄ、２１ｄとこれら端部２０ｄ、
２１ｄの間の超電導線２ＯＡ、２０Ａと、スペーサパイ
プ２２．２２とが、上記端部２０ｄ。From the ends 20d, 20d of the outer sheaths 20c, 20C of the superconducting conductor 20.21, superconducting wires 20A, 21A are connected, respectively.
is exposed for a predetermined length, and the exposed superconducting wires 2OA, 21
Approximately half of A is divided into two layers, upper and lower, along the thickness direction, which are stacked alternately as shown in FIG. 4, and all of the stacked parts are soldered. In addition, spacer pipes (spacer members) having an elliptical or rectangular cross section are placed on both the upper and lower surfaces of the superconducting wires 20A and 21A stacked as described above.
22 is brazed with solder, silver solder, or the like, with its end opening facing the opening of the channel S+ (or S2) of the jacket 20G (or 21C). (Alternatively, it may be fixed by binding with stainless VA wire, etc.) The material constituting the spacer pipe 22 may be a metal material such as copper, copper alloy, stainless steel, aluminum, or aluminum alloy, or FR.
A non-metallic material such as P is used. And the above-mentioned outer cover 20
c, ends 20d, 21d of 210 and these ends 20d,
The superconducting wires 2OA and 20A between 21d and the spacer pipes 22.22 are the end portion 20d.

２１ｄを両端部に嵌入した角型筒状の銅製あるいはステ
ンレス銅製のジヨイントカバー２３によって覆われると
ともに、このジヨイントカバー２３の端部を上記外被２
０Ｃ（あるいは２１Ｃ）に、銀ロウあるいは半田等を用
いたろう付けによって、あるいは溶接によって、気密に
接合して上記外被２０の端部２０ｄと外被２１の端８１
１２１ｄとが連結されている。21d is fitted into both ends of the joint cover 23, which is made of copper or stainless steel.
0C (or 21C), the end 20d of the outer sheath 20 and the end 81 of the outer sheath 21 are hermetically joined by brazing using silver solder or solder, or by welding.
121d are connected.

上記の接続構造は、超電導導線２０．２１によって各々
形成された超電導コイルどうしの接続等に適用される。The above connection structure is applied to connections between superconducting coils each formed by superconducting conductive wires 20 and 21, and the like.

そして、超電導導体２０．２１の流路Ｓ＋　、３２には
超臨界圧ヘリウム等の冷媒を流して超電導導体２０．２
１を極低温に冷却するとともに、超電導コイルを真空容
器に収納して使用りる。Then, a coolant such as supercritical pressure helium is passed through the channels S+ and 32 of the superconducting conductor 20.21.
1 is cooled to an extremely low temperature, and the superconducting coil is stored in a vacuum container for use.

−１−、述したＪ、うな接続構造にあっては、超電導線
２ＯＡ、２１Ａを重ねてろう付けしてあり、第１２図〜
第１４図に示す従来の構造に比較して、ろう付すされた
部分が良いため、超電導線２ＯＡ。-1-, In the above-mentioned J, Una connection structure, the superconducting wires 2OA and 21A are stacked and brazed, and Figs.
Compared to the conventional structure shown in FIG. 14, the superconducting wire 2OA has better brazed parts.

２１△の電気的接続が充分であり、接続強度も高い。そ
して、超電導線２ＯＡ、２１Ａは撚線になっているため
、重ね合わけた場合に、重ね合わせ部分の厚みの増加を
第１５図に示す従来の構造よりも少なくできる。また、
ろう付けされた超電導線２ＯＡ、２１Ａの両側のスペー
サパイプ２２は流路Ｓ＋　、８２に通じ、ろう付けされ
た超電導線２ＯＡ、２１Ａはジヨイントカバー２３で覆
われているため、流路Ｓ＋　、８２に冷媒を流した場合
、冷媒はスペーサパイプ２２の内部と周囲とを流れるの
で、冷媒によって超電導線２ＯＡ、２１Ａの接続部を直
接冷却でき、冷却効果が高い。なお、スペーサパイプ２
２は冷媒の通路となってジヨイントカバー２３内での冷
媒の流れを円滑にするとともに、外被２０Ｃの端部２０
ｄと外被２１Ｃの端部２１ｄとの間の超電導線２ＯＡ、
２１Ａの保護用ともなる。すなわら、超電導線２〇八、
２１Ａに電流を流して強大な電磁力を発生させた場合、
超電導線２ＯＡ、２１Ａに電磁力が作用するが、スペー
サパイプ２２がジヨイントカバー２３に接して超電導線
２ＯＡ、２１Ａの接続部の動きを抑え、その損傷を防止
する。そらに、ジヨイントカバー２３は外被２０ｃの端
部２０ｄと外被２１ｃの端部２１ｄとに固定されている
ため、外被２０ｃ、２１ｃにこれらを離す方向に力が作
用しても、ジヨイントカバー２３がこの力を支え、内８
１Ｓの超電導線２０Ａ、２１Ａのろう付は部分に負荷を
が番プないようになっている。なＪ５また、ジヨイント
カバー２３は、外被２０ｃ、２１ｃに接合されていて、
ジヨイントカバー２３の内外を気密に遮断しているので
、超電導導体２０．２１を真空容器に入れて使用した場
合に、ジヨイントカバ−２３外部の真空雰囲気とジヨイ
ントカバ−２３内部の冷媒とを完全に分けることができ
る。The electrical connection of 21Δ is sufficient and the connection strength is also high. Since the superconducting wires 2OA and 21A are twisted wires, when they are overlapped, the increase in thickness of the overlapping portion can be made smaller than in the conventional structure shown in FIG. 15. Also,
The spacer pipes 22 on both sides of the brazed superconducting wires 2OA, 21A communicate with the flow path S+, 82, and since the brazed superconducting wires 2OA, 21A are covered with the joint cover 23, the flow path S+, 82 When a refrigerant is flowed into the spacer pipe 22, the refrigerant flows inside and around the spacer pipe 22, so that the refrigerant can directly cool the connecting portion of the superconducting wires 2OA and 21A, resulting in a high cooling effect. In addition, spacer pipe 2
2 serves as a refrigerant passage to smooth the flow of refrigerant within the joint cover 23, and also serves as a refrigerant passage at the end 20 of the outer cover 20C.
d and the end 21d of the jacket 21C, the superconducting wire 2OA,
It also serves as a protection for 21A. In other words, superconducting wire 208,
When a current of 21A is passed and a strong electromagnetic force is generated,
Although electromagnetic force acts on the superconducting wires 2OA and 21A, the spacer pipe 22 comes into contact with the joint cover 23 to suppress movement of the connecting portion of the superconducting wires 2OA and 21A, thereby preventing damage thereto. Furthermore, since the joint cover 23 is fixed to the end 20d of the outer sheath 20c and the end 21d of the outer sheath 21c, even if a force is applied to the outer sheaths 20c and 21c in the direction of separating them, the joint cover 23 will not move. The int cover 23 supports this force, and the inner 8
The brazing of the 1S superconducting wires 20A and 21A is done so that no load is applied to the parts. Furthermore, the joint cover 23 is joined to the outer covers 20c and 21c,
Since the inside and outside of the joint cover 23 are airtightly isolated, when the superconducting conductor 20, 21 is used in a vacuum container, the vacuum atmosphere outside the joint cover 23 and the refrigerant inside the joint cover 23 are completely separated. be able to.

ところＣ１上記構造を強制冷ｕ１超電導マグネット〔１
０Ｔ（テスラ）−１０ＫＡ〕の４つのダブルパンケーキ
コイルの間の接続に適用して、実際に上記マグネットを
作動させてみた。外部磁場６王を得てコイルに１０ＫＡ
で通電した場合、中心磁場１０　Ｔを生じた。この結果
は、短線試料結果から描かれる負荷曲線に十分対応し、
接続部分で劣化も認められなかった。即ち、接続部分で
の異常はなく、電磁力による超電導線の動きも発生せず
、接続部分の冷ｕ１が充分なされていたことを証明りる
ものである。However, C1 above structure is forcibly cooled U1 superconducting magnet [1
The above magnet was actually operated by applying it to a connection between four double pancake coils of 0T (Tesla) - 10KA]. 10KA to the coil by obtaining an external magnetic field of 6
When energized at , a central magnetic field of 10 T was generated. This result corresponds well to the load curve drawn from the short line sample results,
No deterioration was observed at the connection part. In other words, there was no abnormality in the connected portion, and no movement of the superconducting wire due to electromagnetic force occurred, proving that the connected portion was sufficiently cooled u1.

第５図は、外被２０ｃ、２１ｃから出された超電導線２
ＯＡ’　、２１Ａ’の重ね合わせ構成の他の例、を示す
もので、２層に分割した超電導線２０Ａ′の間に超電導
線２１Ａ′の先端部を挾み込んで重ね合わせたものであ
る。Figure 5 shows the superconducting wires 2 taken out from the outer sheaths 20c and 21c.
This shows another example of the superconducting structure of OA' and 21A', in which the tip of superconducting wire 21A' is sandwiched between two layers of superconducting wire 20A' and superposed.

なお、超電導線２ＯＡ、２ＯＡ’　、２１Ａ、２１Ａ’
　は各々３層以上に分割して重ね合わせてもよい。In addition, superconducting wires 2OA, 2OA', 21A, 21A'
Each layer may be divided into three or more layers and stacked one on top of the other.

第６図は、スペーサパイプの第２の例を示すもので、こ
の例のスペーサパイプ２２′の天井壁と底壁には、スペ
ーサパイプ２２′の中空部に通じる連絡孔２２ａが複数
形成され、これら連絡孔２２ａを介して冷媒が流出入で
きるようになっており、直接冷媒が接続部の超電導線を
冷却できる。FIG. 6 shows a second example of a spacer pipe, in which a plurality of communication holes 22a communicating with the hollow part of the spacer pipe 22' are formed in the ceiling wall and bottom wall of the spacer pipe 22'. A refrigerant can flow in and out through these communication holes 22a, and the refrigerant can directly cool the superconducting wires at the connection portion.

第７図は、スペーサパイプの第３の例を示すもので、こ
の例のスペーサパイプ２２″の側部にはスペーサパイプ
２２″の中空部に通じるスリット２２ｂが複数形成され
、これらスリット２２ｂを介して冷媒が流出入できるよ
うになっている。FIG. 7 shows a third example of a spacer pipe, in which a plurality of slits 22b communicating with the hollow part of the spacer pipe 22'' are formed on the side of the spacer pipe 22'' of this example. This allows refrigerant to flow in and out.

第８図は、ジヨイントカバーの他の例を示すもので、こ
の例のジヨイントカバー２３′は横断面口字状の第１カ
バ一部材２３ａと第２カバ一部材２３ｂとから構成され
、２つのカバ一部材２３ａ。FIG. 8 shows another example of the joint cover, and the joint cover 23' of this example is composed of a first cover member 23a and a second cover member 23b, each having an opening-shaped cross section. Two cover members 23a.

２３ｂを助合して筒状とし、先の実施例のジヨイントカ
バー２３と同様に使用するものである。カバ一部材２３
ａ、２３ｂは、銀ロウや半田等を用いたロウ付け、ある
いは、溶接によって一体化する。なお、この例のジヨイ
ントカバー２３′は、一方のカバ一部材２３ａ　（ある
いは２３ｂ）を外被２０ｃ、２１ｃの端部２０ｄ　、　
２１ｄ　ｋｌ：１１合した後に使方のカバ一部材２３ｂ
　（あるいは２３ａ）をｌｔＸ合し、一体化して使用で
きるので、先の実施例のカバ一部材２３の取り付けが困
難な場合でも簡里に取り付けうろことがある。なお、こ
のような嵌合型ではなく、筒状のジヨイントカバーを用
いることも可能である。この場合には、接続時にあらか
じめ一方の導体側にジヨイントカバーを挿入しておぎ、
中心の超電導素線を半田固定した後、接続部を覆うよう
に移動し、ジヨイントカバーの両端を導体に半田固定す
ればよい。23b are joined together to form a cylindrical shape and used in the same manner as the joint cover 23 of the previous embodiment. Cover part 23
a and 23b are integrated by brazing using silver solder, solder, or the like, or by welding. Note that the joint cover 23' of this example has one cover member 23a (or 23b) connected to the ends 20d of the outer covers 20c and 21c,
21d kl: Cover part 23b for use after 11 combination
(or 23a) can be combined with ltX and used in an integrated manner, so even if it is difficult to attach the cover member 23 of the previous embodiment, it can be easily attached. Note that it is also possible to use a cylindrical joint cover instead of such a fitting type. In this case, insert a joint cover on one conductor side before making the connection.
After fixing the central superconducting wire by soldering, it should be moved to cover the connection part, and both ends of the joint cover should be fixed to the conductor by soldering.

「発明の効果」 以上説明したようにこの発明は、一対の外被の端部から
一層で、或いは、２層以上に分割して露出した超電導線
を一層以上の層ごとに重ね合わせてろう付けし、このろ
う付けされた超電導線の外面にスペーサ部材を固定し、
外被の端部間の超電導線とスペーサ部材とをジヨイント
カバーで覆い、ジヨイントカバーの端部の各々を上記外
被の端部に接合して外被の端部どうしを連結したもので
あり、超電導線のろう付は部の周囲に冷媒が流れ、上記
ろう付は部が冷媒の流路内にあるため、直接冷却となっ
て冷却効果が高い。また、超電導線を一層以上の層ごと
に重ね合わせてろう付けしていて、従来構造に比較して
ろう付は部分を長くしであるため、超電導線どうしの電
気的接続が充分になるとともに接続強度も高い。さらに
、スペーサ部材は、ジヨイントカバー内での超電導線の
移動をジヨイントカバーに当接して抑えるため、電磁力
が作用して動こうとする超電導線を押さえ、ろう付は部
分を保護する。そして、ジョイントカバ−はその両端で
外被に接合していて、ジヨイントカバーの内外を遮断す
るため、超電導導体を真空容器に入れて使用した場合に
、ジヨイントカバー外方の真空雰囲気とジヨイントカバ
ー内の冷媒とを分けて相互の影響を無くすることができ
る。``Effects of the Invention'' As explained above, the present invention has the advantage of superconducting wires exposed from the ends of a pair of jackets in one layer or divided into two or more layers, which are stacked layer by layer and brazed together. Then, a spacer member is fixed to the outer surface of this brazed superconducting wire,
The superconducting wire and the spacer member between the ends of the outer sheath are covered with a joint cover, and each end of the joint cover is joined to the end of the outer sheath to connect the ends of the outer sheath. When brazing superconducting wires, a refrigerant flows around the part, and in the above-mentioned brazing, the part is in the flow path of the refrigerant, so it is directly cooled and has a high cooling effect. In addition, the superconducting wires are stacked layer by layer and brazed together, and compared to conventional structures, the brazing section is longer, so the electrical connection between the superconducting wires is sufficient and the connection It also has high strength. Further, since the spacer member suppresses the movement of the superconducting wire within the joint cover by coming into contact with the joint cover, electromagnetic force acts to suppress the superconducting wire that is about to move, and the brazing protects the portion. The joint cover is joined to the outer jacket at both ends, and in order to isolate the inside and outside of the joint cover, when the superconducting conductor is used in a vacuum container, the joint cover will not be connected to the vacuum atmosphere outside the joint cover. The refrigerant inside the inlet cover can be separated to eliminate mutual influence.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図ないし第４図はこの発明の一実施例を示すもので
、第１図は要部の断面図、第２図は斜視図、第３図は超
電導導体の斜視図、第４図は超電導線の重ね合わせ状態
を示す略図、第５図は超電導線の重ね合わせ状態の例を
示す略図、第６図はスペーサパイプの第２の例を示す斜
視図、第７図はスペーサパイプの第３の例を示す斜視図
、第８図はジヨイントカバーの他の例を示す斜視図、第
９図は第１の従来例を示す横断面図、第１０図は第２の
従来例を示す横断面図、第１１図は第３の従来例を示す
斜視図、第１２図は第４の従来例を示す斜視図、第１３
図は第５の従来例を示す斜視図、第１４図は第６の従来
例を示す斜視図、第１５図は第７の従来例を示す斜視図
である。 ２０．２１・・・・・・超電導導体、２ＯＡ、２１Ａ・
・・・・・超電導線、２０ｃ、２１ｃ・・・・・・外被
、Ｓｔ　、　８２・・・・・・流路、２０ｄ、２１ｄ・
・・・・・端部、２２．２２’２２”・・・・・・スペ
ーサパイプ（スペーサ部材）、２３．２３’　・・・・
・・ジヨイントカバー、２ＯＡ’　。 ２１Ａ′・・・・・・超電導線。Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is a sectional view of the main part, Figure 2 is a perspective view, Figure 3 is a perspective view of a superconducting conductor, and Figure 4 is a perspective view of a superconducting conductor. FIG. 5 is a schematic diagram showing an example of superconducting wires stacked together, FIG. 6 is a perspective view showing a second example of a spacer pipe, and FIG. 7 is a schematic diagram showing a second example of a spacer pipe. 8 is a perspective view showing another example of the joint cover, FIG. 9 is a cross-sectional view showing the first conventional example, and FIG. 10 is a second conventional example. A cross-sectional view, FIG. 11 is a perspective view showing the third conventional example, FIG. 12 is a perspective view showing the fourth conventional example, and FIG.
FIG. 14 is a perspective view of the fifth conventional example, FIG. 14 is a perspective view of the sixth conventional example, and FIG. 15 is a perspective view of the seventh conventional example. 20.21...Superconductor, 2OA, 21A・
...superconducting wire, 20c, 21c...sheath, St, 82...channel, 20d, 21d...
... End, 22.22'22" ... Spacer pipe (spacer member), 23.23' ...
...Joint cover, 2OA'. 21A'...Superconducting wire.

Claims (1)

【特許請求の範囲】[Claims] 内部に冷媒の流路が形成された外被と、上記流路に挿入
された超電導線とを有する強制冷却超電導導体どうしの
接続構造であつて、対向する一対の外被の各々の端部か
ら一層で、或いは、二層以上に分割して露出された超電
導線が、所定長さにわたつて、一層以上の層ごとに重ね
合わされてろう付けされ、このろう付けされた超電導線
の外面には、スペーサ部材が、固定されるとともに、上
記一対の外被の端部とこれら端部間の超電導線とスペー
サ部材とがジョイントカバーで気密に覆われ、ジョイン
トカバーの端部を各々外被の端部に接合して上記一対の
外被が連結されてなることを特徴とする強制冷却超電導
導体の接続構造。A connection structure between forcedly cooled superconducting conductors, which has an outer sheath in which a refrigerant flow path is formed, and a superconducting wire inserted into the flow path, in which a connection structure is formed between each of the ends of a pair of opposing outer sheaths. Superconducting wires exposed in one layer or divided into two or more layers are overlaid and brazed one or more layers over a predetermined length, and the outer surface of the brazed superconducting wire is , the spacer member is fixed, and the ends of the pair of jackets, the superconducting wire between these ends, and the spacer member are hermetically covered with a joint cover, and the ends of the joint cover are connected to the ends of the jacket, respectively. A connection structure for a forcedly cooled superconducting conductor, characterized in that the pair of outer sheaths are connected by being joined to a portion thereof.