JPH05217743A - Detachable power lead and superconducting mrgnet - Google Patents
Detachable power lead and superconducting mrgnetInfo
- Publication number
- JPH05217743A JPH05217743A JP1519892A JP1519892A JPH05217743A JP H05217743 A JPH05217743 A JP H05217743A JP 1519892 A JP1519892 A JP 1519892A JP 1519892 A JP1519892 A JP 1519892A JP H05217743 A JPH05217743 A JP H05217743A
- Authority
- JP
- Japan
- Prior art keywords
- pin
- movable
- fixed
- guide
- power lead
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、例えば超電導コイル
に励磁電流を供給する着脱パワーリードおよびこの着脱
パワーリードを利用した超電導磁石装置に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detachable power lead for supplying an exciting current to a superconducting coil and a superconducting magnet device using the detachable power lead.
【０００２】[0002]
【従来の技術】従来、例えば超電導磁石装置の超電導コ
イルに励磁電流を供給するパワーリードは、銅等からな
る常備式パワーリードが用いられていた。しかしなが
ら、パワーリードを構成する銅等の材料は、熱良導体で
あるために熱伝導による熱侵入量が極めて大きいという
欠点があった。2. Description of the Related Art Conventionally, as a power lead for supplying an exciting current to a superconducting coil of a superconducting magnet device, a permanent power lead made of copper or the like has been used. However, the material such as copper that constitutes the power lead has a drawback that the amount of heat penetration due to heat conduction is extremely large because it is a good conductor of heat.
【０００３】その改善策として、パワーリードを使用し
ない時に切り離し、常温部と低温部との間の熱経路を遮
断する着脱パワーリードが提案されている。図３は例え
ば低熱侵入着脱パワーリード（第３７回低温工学研究発
表会予行集、Ｐ．１３６、１９８７）に記載された従来
の着脱パワーリードの一例を示す接続部断面図であり、
図において８はリードケーブル、９は着脱用の可動側マ
ルチピンコネクタ、１０は着脱用の固定側マルチピンコ
ネクタ、１１は可動側マルチピンコネクタ９の可動スト
ロークを確保するベロー、１２は可動側および固定側マ
ッルチピンコネクタ９、１０を支持する構造体、１３は
着脱部全体を支持する支持棒、１４はベロー１１を伸縮
動作させるための駆動用ヘリウムガス用配管、１５は駆
動ヘリウムガスを送排気するための圧縮・真空ポンプ、
バッファ、バルブ等からなるガス制御系である。As a remedy for this problem, a detachable power lead has been proposed which disconnects the power lead when not in use and shuts off the heat path between the room temperature part and the low temperature part. FIG. 3 is a cross-sectional view of a connecting portion showing an example of a conventional detachable power lead described in, for example, a low heat penetration detachable power lead (37th Low Temperature Engineering Research Conference Proceedings, P. 136, 1987).
In the figure, 8 is a lead cable, 9 is a removable movable-side multi-pin connector, 10 is a removable fixed-side multi-pin connector, 11 is a bellows that secures a movable stroke of the movable-side multi-pin connector 9, and 12 is a movable side and A structure for supporting the fixed side multi-pin connectors 9, 10, a support rod 13 for supporting the entire attachment / detachment portion, a driving helium gas pipe for expanding / contracting the bellows 11, and a driving helium gas for feeding 15. A compression / vacuum pump for exhausting,
A gas control system including a buffer and a valve.
【０００４】つぎに、上記従来の着脱パワーリードの動
作について説明する。まず、ヘリウムガスの圧縮ガス
が、常温部に置かれたガス制御系１５によって駆動用ヘ
リウムガス用配管１４を介してベロー１１に送り込まれ
る。ベロー１１は、送り込まれた圧縮ガスによって伸長
し、可動側マルチピンコネクタ９は固定側マルチピンコ
ネクタ１０側に移動し、可動側マルチピンコネクタ９が
固定側マルチピンコネクタ１０に装着され、超電導コイ
ルに励磁電流が供給される。The operation of the conventional removable power lead will be described below. First, the compressed gas of helium gas is sent to the bellows 11 through the driving helium gas pipe 14 by the gas control system 15 placed at the room temperature. The bellows 11 is expanded by the compressed gas that has been sent, the movable-side multi-pin connector 9 moves to the fixed-side multi-pin connector 10 side, the movable-side multi-pin connector 9 is attached to the fixed-side multi-pin connector 10, and the superconducting coil An exciting current is supplied to.
【０００５】ついで、超電導コイルが永久電流モードで
運転した後、ガス制御系１５によって駆動用ヘリウムガ
ス用配管１５を介してベロー１１内のヘリウムガスを排
気する。ベロー１１は、ヘリウムガスの排気によって収
縮し、可動側マルチピンコネクタ９が固定側マルチピン
コネクタ１０から外され、非通電状態となり、熱的に絶
縁された状態となる。Then, after the superconducting coil is operated in the permanent current mode, the helium gas in the bellows 11 is exhausted by the gas control system 15 through the driving helium gas pipe 15. The bellows 11 is contracted by the exhaust of the helium gas, the movable-side multi-pin connector 9 is removed from the fixed-side multi-pin connector 10, and the bellows 11 is de-energized and is in a thermally insulated state.
【０００６】上記従来の着脱パワーリードは、ベロー１
１内への圧縮ガスの送排気を行いベロー１１を伸縮させ
ることにより、可動側マルチピンコネクタ９と固定側マ
ルチピンコネクタ１０との着脱が行われるので、通電時
にのみパワーリードを装着して定格電流まで通電し、超
電導コイルを永久電流モードで運転させた後、パワーリ
ードを外し、熱的な侵入経路を遮断して、侵入熱の低減
化を図っている。The above conventional detachable power lead is a bellows 1
Since the movable side multi-pin connector 9 and the fixed side multi-pin connector 10 are attached / detached by sending / exhausting the compressed gas into / from 1 and expanding / contracting the bellows 11, the power lead is attached only when the power is on. After energizing up to the current and operating the superconducting coil in the permanent current mode, the power lead is removed and the thermal intrusion route is cut off to reduce the intrusion heat.
【０００７】また、上記従来の着脱パワーリードでは、
あらかじめ可動側および固定側マルチピンコネクタ９、
１０を位置的に合わせた状態で、可動側および固定側マ
ルチピンコネクタ９、１０を構造体１２で支持すること
により、可動側および固定側マルチピンコネクタ９、１
０の装着脱の際の着脱部での接触抵抗の増大を抑え、通
電時の発熱を抑えており、さらにマルチピンコネクタを
用いて、接触抵抗を抑えるとともに、リード１本あたり
の通電電流を小さくして接触抵抗による発熱を抑えてい
る。Further, in the above conventional detachable power lead,
Movable side and fixed side multi-pin connector 9,
By supporting the movable-side and fixed-side multi-pin connectors 9 and 10 with the structure 12 in a state where 10 is aligned, the movable-side and fixed-side multi-pin connectors 9 and 1
It suppresses an increase in contact resistance at the attachment / detachment part when attaching / detaching 0, and suppresses heat generation during energization. In addition, the contact resistance is suppressed by using a multi-pin connector, and the energizing current per lead is small. The heat generated by contact resistance is suppressed.
【０００８】[0008]
【発明が解決しようとする課題】従来の着脱パワーリー
ドは以上のように、可動側および固定側マルチピンコネ
クタ９、１０を構造体１１で支持固定し、かつ、構造体
１１を支持棒１３で支持固定しているので、着脱パワー
リードの着脱部が切り離されても支持棒１３が常温部と
つながっており、例え支持棒１３に低熱伝導材を用いて
も、支持棒１３を介して熱侵入が生じてしまい、またマ
ルチピンを用いてピン１本あたりの通電電流は小さくな
るが、ピン数が多くなると装着時の位置合わせが困難と
なり、かつピン径が細くなって強度が低くなり、装着時
にピンの破損が発生するという課題があった。As described above, in the conventional detachable power lead, the movable side and fixed side multi-pin connectors 9 and 10 are supported and fixed by the structure 11, and the structure 11 is supported by the support rod 13. Since the support rod 13 is supported and fixed, the support rod 13 is connected to the room temperature portion even if the attachment / detachment portion of the attachment / detachment power lead is separated, and even if a low thermal conductive material is used for the support rod 13, the heat intrusion occurs through the support rod 13. In addition, although the current flow per pin is reduced by using a multi-pin, when the number of pins is large, it becomes difficult to perform alignment during mounting, and the pin diameter becomes thin, resulting in low strength. There was a problem that the pin would be damaged.
【０００９】この発明は、上記のような課題を解決する
ためになされたもので、装着脱時のピン間の接触抵抗を
小さくでき、ピン１本あたりの通電電流を多くでき、離
脱時の熱侵入を低減できる着脱パワーリードを得るこ
と、ならびにこの着脱パワーリードを利用した超電導磁
石装置を提供することを目的とする。The present invention has been made in order to solve the above-mentioned problems, and it is possible to reduce the contact resistance between pins at the time of attachment / detachment, to increase the energization current per pin, and to prevent the heat at the time of detachment. An object of the present invention is to obtain a detachable power lead capable of reducing intrusion, and to provide a superconducting magnet device using the detachable power lead.
【００１０】[0010]
【課題を解決するための手段】この発明の第１の発明に
係る着脱パワーリードは、第１のピンが配設された固定
部と、第１のピンに嵌合する第２のピンが配設された可
動部とを対向してなる着脱部を備え、可動部の可動によ
る第１および第２のピンの嵌脱により電気的接続の開閉
を行う着脱パワーリードにおいて、先端部にテーパ部を
有する案内ピンを固定部および可動部の一方に設け、可
動部の可動により案内ピンと係合する案内孔を固定部お
よび可動部の他方に設けるとともに、案内ピンの先端部
と案内孔の入口との間の距離とテーパ部の長さとの和Ｌ
1を、第１のピンと第２のピンとの間の距離Ｌ2に対し
て、Ｌ1≧Ｌ2とするものである。The detachable power lead according to the first aspect of the present invention includes a fixing portion on which the first pin is arranged and a second pin fitted to the first pin. In a detachable power lead that has an attaching / detaching portion that faces a provided movable portion, and that opens and closes an electrical connection by inserting and removing the first and second pins by moving the movable portion, a taper portion is provided at a tip portion. The guide pin that is provided is provided on one of the fixed portion and the movable portion, and a guide hole that engages with the guide pin by the movement of the movable portion is provided on the other of the fixed portion and the movable portion, and the tip of the guide pin and the inlet of the guide hole are provided. Sum of the distance between them and the length of the taper part L
1 is L 1 ≧ L 2 with respect to the distance L 2 between the first pin and the second pin.
【００１１】また、この発明の第２の発明に係る超電導
磁石装置は、超電導コイルに励磁電流を供給するパワー
リードを、第１のピンが配設された固定部と、固定部に
対向して配設された可動部と、可動部に設けられ、可動
部の可動により第１のピンと嵌脱する第２のピンと、固
定部および可動部の一方に設けられ、先端部にテーパ部
を有する案内ピンと、固定部および可動部の他方に設け
られ、可動部の可動により案内ピンと係合する案内孔と
を備え、案内ピンの先端部と案内孔の入口との間の距離
とテーパ部の長さとの和Ｌ1を、第１のピンと第２のピ
ンとの間の距離Ｌ2に対して、Ｌ1≧Ｌ2とする着脱パワ
ーリードとするものである。Also, in the superconducting magnet device according to the second aspect of the present invention, the power lead for supplying the exciting current to the superconducting coil is disposed so as to face the fixing portion provided with the first pin and the fixing portion. A movable part that is provided, a second pin that is provided in the movable part and that is inserted into and removed from the first pin by the movement of the movable part, and a guide that is provided in one of the fixed part and the movable part and has a tapered part at the tip end. A pin, and a guide hole provided on the other of the fixed portion and the movable portion, the guide hole engaging with the guide pin when the movable portion is moved, and the distance between the tip of the guide pin and the inlet of the guide hole and the length of the tapered portion. the sum L 1 of, with respect to the distance L 2 between the first pin and the second pin, it is an detachable power lead to L 1 ≧ L 2.
【００１２】[0012]
【作用】この発明の第１の発明においては、案内ピンの
先端部と案内孔の入口との間の距離とテーパ部の長さと
の和Ｌ1が、第１のピンと第２のピンとの間の距離Ｌ2に
対して、Ｌ1≧Ｌ2となるように、第１および第２のピ
ン、案内ピンおよび案内孔がそれぞれ固定部および可動
部に設けられているので、可動部の可動により案内ピン
のテーパ部が案内孔に案内挿入された時点で、固定部と
可動部とが確実に位置合わせされ、その後の第１のピン
と第２のピンとの嵌合接触が確実にスムーズに行われ
る。In the first aspect of the present invention, the sum L 1 of the distance between the tip of the guide pin and the inlet of the guide hole and the length of the tapered portion is between the first pin and the second pin. Since the first and second pins, the guide pin, and the guide hole are provided in the fixed portion and the movable portion so that L 1 ≧ L 2 with respect to the distance L 2 of When the tapered portion of the guide pin is guided and inserted into the guide hole, the fixed portion and the movable portion are surely aligned with each other, and the subsequent mating contact between the first pin and the second pin is surely and smoothly performed. ..
【００１３】また、この発明の第２の発明においては、
案内ピンの先端部と案内孔の入口との間の距離とテーパ
部の長さとの和Ｌ1が、第１のピンと第２のピンとの間
の距離Ｌ2に対して、Ｌ1≧Ｌ2となるように、第１およ
び第２のピン、案内ピンおよび案内孔がそれぞれ固定部
および可動部に設けられた着脱パワーリードを用いてい
るので、可動部の可動により案内ピンのテーパ部が案内
孔に案内挿入された時点で、固定部と可動部とが確実に
位置合わせされ、その後の第１のピンと第２のピンとの
嵌合接触が確実にスムーズに行われて、接触抵抗が小さ
く抑えられ、ピンあたりの通電電流を大きくでき、さら
にパワーリードの脱離時には、常温部からの熱侵入経路
が遮断される。In the second invention of the present invention,
The sum L 1 of the distance between the tip of the guide pin and the entrance of the guide hole and the length of the tapered portion is L 1 ≧ L 2 with respect to the distance L 2 between the first pin and the second pin. Since the detachable power lead in which the first and second pins, the guide pin, and the guide hole are provided in the fixed portion and the movable portion, respectively, is used, the tapered portion of the guide pin is guided by the movement of the movable portion. When the guide part is inserted into the hole, the fixed part and the movable part are surely aligned with each other, and the subsequent mating contact between the first pin and the second pin is surely performed smoothly, and the contact resistance is suppressed to be small. Therefore, the energization current per pin can be increased, and when the power lead is detached, the heat intrusion route from the room temperature portion is cut off.
【００１４】[0014]
【実施例】以下、この発明の実施例を図について説明す
る。 実施例１．図１はこの発明の第１の発明に係る一実施例
を示す着脱パワーリードの着脱部の断面図である。図に
おいて１は例えばＢ＿Ｎ接続子（株式会社ソルトンのソ
ケットタイプ）である第２のピンとしての可動側メスピ
ン、２は例えばＳ＿Ｎ接続子（株式会社ソルトンのプラ
グタイプ）である第１のピンとしての固定側オスピン、
３は先端部にテーパ部３ａが設けられた案内ピン、４は
入口部に面取り加工が施され、案内ピン３を案内導入す
る案内孔、５は可動側メスピン１および案内ピン３を一
体化する電気絶縁材料で構成された可動部としての可動
側コネクタ、６は固定側オスピン２を一体化する電気絶
縁材料で構成された固定部としての固定側コネクタであ
り、この固定側コネクタ６には、案内孔４が設けられて
いる。７ａ、７ｂおよび７ｃはそれぞれ可動側メスピン
１、固定側オスピン２および案内ピン３を可動側および
固定側コネクタ５、６に固定するナットである。Embodiments of the present invention will be described below with reference to the drawings. Example 1. FIG. 1 is a sectional view of an attaching / detaching portion of an attaching / detaching power lead showing an embodiment according to the first aspect of the present invention. In the drawing, 1 is a movable side female pin as a second pin which is, for example, a B_N connector (Solton socket type), and 2 is a first pin which is, for example, an S_N connector (Solton plug type). Fixed side male pin,
Reference numeral 3 is a guide pin having a tapered portion 3a at its tip end, 4 is a chamfered end portion, and a guide hole for guiding and introducing the guide pin 3 is provided. Reference numeral 5 integrates the movable side female pin 1 and the guide pin 3. A movable side connector as a movable part made of an electrically insulating material, 6 is a fixed side connector as a fixed part made of an electrically insulating material that integrates the fixed side male pin 2, and the fixed side connector 6 has: A guide hole 4 is provided. Reference numerals 7a, 7b and 7c denote nuts for fixing the movable side female pin 1, the fixed side male pin 2 and the guide pin 3 to the movable side and fixed side connectors 5 and 6, respectively.
【００１５】上記実施例１における着脱パワーリードで
は、可動側メスピン１および案内ピン３と固定側オスピ
ン２および案内孔４とがそれぞれ相対するように、かつ
案内ピン３の先端部と固定側コネクタ６（案内孔４の入
口）との間の距離（Ｌ3）とテーパ部３ａの長さ（Ｌ4）
との和Ｌ1と、可動側メスピン１と固定側オスピン２と
の間の距離Ｌ2とが、Ｌ1≧Ｌ2の関係となるように、可
動側メスピン１、固定側オスピン２、案内ピン３、可動
側および固定側コネクタ５、６をそれぞれ配置構成して
いる。In the detachable power lead according to the first embodiment, the movable side female pin 1 and the guide pin 3 and the fixed side male pin 2 and the guide hole 4 face each other, and the tip portion of the guide pin 3 and the fixed side connector 6 respectively. Distance (L 3 ) from (inlet of guide hole 4) and length of tapered portion 3a (L 4 )
The sum L 1 and, as the distance L 2 between the movable-side female pin 1 and the fixed male pin 2, a relationship of L 1 ≧ L 2, the movable female pin 1, the fixed-side male pin 2, the guide pin 3, movable side and fixed side connectors 5 and 6 are respectively arranged.
【００１６】つぎに、上記実施例１の動作について説明
する。駆動機構（図示せず）により可動コネクタ５が、
固定側コネクタ６方向に移動され、Ｌ1≧Ｌ2と構成され
ているので、まず最初に案内ピン３が案内孔４に入る。
ここで、案内ピン３と案内孔４との位置がずれていて
も、テーパ部３ａが案内孔４に案内されて案内孔４内に
挿入され、テーパ部３ａが完全に案内孔４内に挿入され
た時点で、可動側コネクタ５と固定側コネクタ６との位
置合わせが完了する。さらに、可動側コネクタ５を固定
側コネクタ６方向に移動を続けると、可動側メスピン１
が固定側オスピン２に接触し始める。この時、可動側お
よび固定側コネクタ５、６同士の位置合わせが完了して
いるので、可動側メスピン１は極めて良好な接触状態を
保ちながら固定側オスピン２に嵌入されて装着される。Next, the operation of the first embodiment will be described. The movable connector 5 is moved by a drive mechanism (not shown).
Since it is moved toward the fixed side connector 6 and L 1 ≧ L 2 , the guide pin 3 first enters the guide hole 4.
Here, even if the positions of the guide pin 3 and the guide hole 4 are deviated, the tapered portion 3a is guided by the guide hole 4 and inserted into the guide hole 4, and the tapered portion 3a is completely inserted into the guide hole 4. At that time, the alignment of the movable side connector 5 and the fixed side connector 6 is completed. Further, if the movable side connector 5 continues to move toward the fixed side connector 6, the movable side female pin 1
Starts to contact the fixed male pin 2. At this time, since the positions of the movable side and fixed side connectors 5 and 6 are completed, the movable side female pin 1 is fitted and attached to the fixed side male pin 2 while maintaining a very good contact state.
【００１７】ついで、駆動機構により可動側コネクタ５
を固定側コネクタ６から引き離す方向に移動して、可動
側メスピン１が固定側オスピン２から切り離される。Next, the movable side connector 5 is driven by the drive mechanism.
Is moved in a direction in which it is separated from the fixed side connector 6, and the movable side female pin 1 is separated from the fixed side male pin 2.
【００１８】ここで、可動側メスピン１および固定側オ
スピン２として、Ｂ１０Ｎ、Ｓ１０Ｎ接触子をそれぞれ
６個づつ用いた試験装置を作製し、液体ヘリウム温度
（１気圧下で約−２６９℃）下で測定したところ、５０
０Ａ通電時の着脱部の抵抗は、１箇所あたり２００〜３
００μΩと小さな接触抵抗が測定され、モータ駆動によ
る数十回の着脱動作を繰り返した後も、この値は変化し
なかった。Here, a test apparatus using 6 pieces of B10N and 6 pieces of S10N contacts as the movable side male pin 1 and the fixed side male pin 2 was prepared, and the temperature was maintained at a liquid helium temperature (about -269 ° C. under 1 atmospheric pressure). When measured, 50
The resistance of the attachment / detachment part at the time of 0 A energization is 200-3
A contact resistance as small as 00 μΩ was measured, and this value did not change even after repeating several tens of attachment / detachment operations by driving the motor.
【００１９】このように、上記実施例１によれば、案内
ピン３の先端部と固定側コネクタ６との間の距離
（Ｌ3）とテーパ部３ａの長さ（Ｌ4）との和（Ｌ1）≧
可動側メスピン１と固定側オスピン２との間の距離（Ｌ
2）となるように、可動側コネクタ５に可動側メスピン
１およびテーパ部３ａを有する案内ピン３を設け、固定
側コネクタ６に固定側オスピン２および案内孔４を設け
ているので、装着動作における案内ピン３と案内孔４と
の係合により、可動側メスピン１と固定側オスピン２と
の位置合わせが確実に行われ、可動側メスピン１および
固定側オスピン２の本数に拘わらず、接触抵抗の小さい
確実な接続ができ、ピン１本あたりの通電電流値を大き
くでき、着脱による接触抵抗の増加もなく、かつピンの
破損もなく、信頼性の高い着脱パワーリードが得られる
という効果がある。As described above, according to the first embodiment, the sum of the distance (L 3 ) between the tip of the guide pin 3 and the fixed connector 6 and the length (L 4 ) of the tapered portion 3a ( L 1 ) ≧
The distance between the movable female pin 1 and the fixed male pin 2 (L
2 ), the movable side connector 5 is provided with the movable side female pin 1 and the guide pin 3 having the tapered portion 3a, and the fixed side connector 6 is provided with the fixed side male pin 2 and the guide hole 4. By the engagement of the guide pin 3 and the guide hole 4, the movable side female pin 1 and the fixed side male pin 2 are surely aligned with each other, and the contact resistance is increased regardless of the number of the movable side female pin 1 and the fixed side male pin 2. There is an effect that a small and reliable connection can be achieved, a current value per pin can be increased, a contact resistance due to attachment / detachment does not increase, and a pin is not damaged, so that a highly reliable detachable power lead can be obtained.
【００２０】実施例２．図２はこの発明の第２の発明に
係る超電導磁石装置の断面図である。図において、２０
は超電導磁石装置の真空槽、２１は第１輻射熱シール
ド、２２は第２輻射熱シールド、２３はヘリウム槽、２
４はヘリウム槽２３内に収納された超電導コイル、２５
は超電導コイル２４を冷却する液体ヘリウム、２６は液
体ヘリウム２５の蒸発ガス、２７は蒸発ガス２６が再び
冷却されてできた液滴、２８はヘリウム槽２３に通じる
ポート、２９は第１段ヒートステージ２９ａ、第２段ヒ
ートステージ２９ｂおよび第３段ヒートステージ２９ｃ
からなる３段式ギフォード・マクマホン冷凍機、３０は
ヘリウム槽２３内に配設された上記実施例１による着脱
パワーリードである。Example 2. FIG. 2 is a sectional view of a superconducting magnet device according to a second invention of the present invention. In the figure, 20
Is a vacuum tank of the superconducting magnet device, 21 is a first radiation heat shield, 22 is a second radiation heat shield, 23 is a helium tank, 2
4 is a superconducting coil housed in the helium tank 23, 25
Is liquid helium for cooling the superconducting coil 24, 26 is evaporative gas of the liquid helium 25, 27 is droplets formed by cooling the evaporative gas 26 again, 28 is a port leading to the helium tank 23, and 29 is a first stage heat stage. 29a, second heat stage 29b and third heat stage 29c
The three-stage Gifford-McMahon refrigerator, which is composed of, is a detachable power lead according to the first embodiment, which is disposed in the helium tank 23.
【００２１】ここで、着脱パワーリード３０は、固定側
コネクタ６がヘリウム槽２３の内壁面に支持固定される
とともに、固定側オスピン２が超電導コイル２４に連結
され、可動側メスピン１が例えば銅管等により常温部ま
で連結されて電流リード３０ａを形成し、可動側コネク
タ５が図示していない駆動機構と連結されている。In the detachable power lead 30, the fixed connector 6 is supported and fixed on the inner wall surface of the helium tank 23, the fixed male pin 2 is connected to the superconducting coil 24, and the movable female pin 1 is, for example, a copper pipe. The movable side connector 5 is connected to a drive mechanism (not shown) by connecting the movable side connector 5 to the room temperature portion by means of the like.
【００２２】つぎに、上記実施例２の動作について説明
する。３段式ギフォード・マクマホン冷凍機２９の第１
段ヒートステージ２９ａおよび第２段ヒートステージ２
９ｂにより第１および第２輻射熱シールド２１、２２を
冷却し、かつ第３段ヒートステージ２９ｃでヘリウム槽
２３を介して蒸発ガス２６を冷却して再液化している。
常温部から極低温部への熱侵入は、真空層２０、第１お
よび第２輻射熱シールド２１、２２により抑えられてい
る。超電導コイル２４は、液体ヘリウム２５により冷却
され、極低温状態に保持されている。Next, the operation of the second embodiment will be described. The first of the three-stage Gifford McMahon refrigerator 29
Stage heat stage 29a and second stage heat stage 2
9b cools the first and second radiant heat shields 21 and 22, and the third heat stage 29c cools the evaporated gas 26 through the helium tank 23 to reliquefy it.
The vacuum layer 20 and the first and second radiant heat shields 21 and 22 prevent the heat from entering from the room temperature portion to the cryogenic portion. The superconducting coil 24 is cooled by liquid helium 25 and kept in a cryogenic state.
【００２３】ここで、駆動機構により可動側コネクタ５
が固定側コネクタ６側へ移動され、案内ピン３の先端部
が案内孔４内に入る。案内ピン３と案内孔４との位置が
ずれていても、テーパ部３ａが案内孔４に案内されて案
内孔４内に挿入され、テーパ部３ａが完全に案内孔４内
に挿入された時点で、可動側コネクタ５と固定側コネク
タ６との位置合わせが完了する。さらに、可動側コネク
タ５を固定側コネクタ６方向に移動を続けると、可動側
メスピン１が固定側オスピン２に接触し始める。この
時、可動側および固定側コネクタ５、６同士の位置合わ
せが完了しているので、可動側メスピン１は極めて良好
な接触状態を保ちながら固定側オスピン２に嵌入されて
装着され、超電導コイル２４に励磁電流が供給される。Here, the movable side connector 5 is driven by the drive mechanism.
Is moved to the fixed side connector 6 side, and the tip end portion of the guide pin 3 enters the guide hole 4. Even when the positions of the guide pin 3 and the guide hole 4 are deviated, the tapered portion 3a is guided by the guide hole 4 and inserted into the guide hole 4, and when the tapered portion 3a is completely inserted into the guide hole 4. Then, the alignment of the movable side connector 5 and the fixed side connector 6 is completed. Further, when the movable side connector 5 continues to move toward the fixed side connector 6, the movable side female pin 1 starts to contact the fixed side male pin 2. At this time, since the alignment of the movable side and fixed side connectors 5 and 6 has been completed, the movable side female pin 1 is fitted and attached to the fixed side male pin 2 while maintaining a very good contact state, and the superconducting coil 24 An exciting current is supplied to.
【００２４】ついで、超電導コイル２４に定格電流まで
通電し、超電導コイル２４を永久電流モードで運転させ
た後、駆動機構により可動側コネクタ５を固定側コネク
タ６から引き離す方向に移動して、可動側メスピン１を
固定側オスピン２から切り離して、超電導コイル２４へ
の励磁電流の供給を停止する。Then, after the superconducting coil 24 is energized to the rated current and the superconducting coil 24 is operated in the permanent current mode, the movable side connector 5 is moved in the direction of separating from the fixed side connector 6 by the drive mechanism to move the movable side. The female pin 1 is separated from the fixed male pin 2, and the supply of the exciting current to the superconducting coil 24 is stopped.
【００２５】ここで、固定側コネクタ６を低温側である
ヘリウム槽２３から支持する構造としているので、着脱
パワーリード３０の脱離時に常温側と低温側とを直接連
結する熱的経路がなくなり、熱侵入を殆どなくすことが
できる。Here, since the fixed side connector 6 is structured to be supported from the helium tank 23 which is the low temperature side, there is no thermal path for directly connecting the room temperature side and the low temperature side when the detachable power lead 30 is detached, The heat intrusion can be almost eliminated.
【００２６】このように、上記実施例２によれば、案内
ピン３の先端部と固定側コネクタ６との間の距離
（Ｌ3）とテーパ部３ａの長さ（Ｌ4）との和（Ｌ1）≧
可動側メスピン１と固定側オスピン２との間の距離（Ｌ
2）となるように、可動側コネクタ５に可動側メスピン
１およびテーパ部３ａを有する案内ピン３を設け、固定
側コネクタ６に固定側オスピン２および案内孔４を設け
た着脱パワーリードを備え、超電導コイルに励磁電流を
供給するようにしているので、ピン１本あたりの通電電
流値を大きくでき、大電流を供給できる、かつ、脱離時
の常温部と低温部との熱的経路をほぼ完全に遮断でき、
常温部からの熱侵入を極めて小さく抑えることができる
超電導磁石装置が得られるという効果がある。As described above, according to the second embodiment, the sum of the distance (L 3 ) between the tip of the guide pin 3 and the fixed connector 6 and the length (L 4 ) of the tapered portion 3a ( L 1 ) ≧
The distance between the movable female pin 1 and the fixed male pin 2 (L
2 ), the movable side connector 5 is provided with the movable side female pin 1 and the guide pin 3 having the tapered portion 3a, and the fixed side connector 6 is provided with the detachable power lead having the fixed side male pin 2 and the guide hole 4. Since the exciting current is supplied to the superconducting coil, the energizing current value per pin can be increased, a large current can be supplied, and the thermal path between the room temperature part and the low temperature part during desorption is almost Can be completely shut off,
There is an effect that it is possible to obtain a superconducting magnet device in which heat intrusion from a room temperature portion can be suppressed to an extremely small level.
【００２７】なお、上記各実施例では、第２のピンとし
て可動側メスピン１を用い、第１のピンとして固定側オ
スピン２を用いるものとして説明しているが、第２のピ
ンとしてオスピンを用い、第１のピンとしてメスピンを
用いるものとしてもよい。In the above embodiments, the movable side female pin 1 is used as the second pin and the fixed side male pin 2 is used as the first pin. However, the male pin is used as the second pin. Alternatively, a female pin may be used as the first pin.
【００２８】また、上記各実施例では、案内ピン３を可
動側コネクタ５に設け、案内孔４を固定側コネクタ６に
設けるものとして説明しているが、案内ピン３を固定側
コネクタ６に、案内孔４を可動側コネクタ５に設けるも
のとしてもよい。In each of the above embodiments, the guide pin 3 is provided in the movable side connector 5 and the guide hole 4 is provided in the fixed side connector 6, but the guide pin 3 is provided in the fixed side connector 6. The guide hole 4 may be provided in the movable side connector 5.
【００２９】さらに、上記各実施例では、案内ピン３を
１本設け、可動側および固定側コネクタ５、６の位置合
わせを行うものとして説明しているが、案内ピンを複数
本設けるものとし、可動側および固定側コネクタ５、６
の位置合わせをより確実に行うことができる。Furthermore, in each of the above-mentioned embodiments, one guide pin 3 is provided to align the movable side and fixed side connectors 5 and 6, but a plurality of guide pins are provided. Movable side and fixed side connectors 5, 6
Can be more surely aligned.
【００３０】さらにまた、上記各実施例では、可動側メ
スピン１、固定側オスピン２および案内ピン３をナット
７ａ、７ｂ、７ｃで可動側および固定側コネクタ５、６
に固定するものとして説明しているが、ナットに限らず
これらのピンをコネクタに固定できるものであればよ
い。Furthermore, in each of the above embodiments, the movable side female pin 1, fixed side male pin 2 and guide pin 3 are attached to the movable side and fixed side connectors 5, 6 by nuts 7a, 7b, 7c.
However, it is not limited to nuts, and any other device capable of fixing these pins to the connector may be used.
【００３１】[0031]
【発明の効果】この発明は、以上のように構成されてい
るので、以下に記載されるような効果を奏する。Since the present invention is constructed as described above, it has the following effects.
【００３２】この発明の第１の発明によれば、先端部に
テーパ部を有する案内ピンを固定部および可動部の一方
に設け、可動部の可動により案内ピンと係合する案内孔
を固定部および可動部の他方に設けるとともに、案内ピ
ンの先端部と案内孔の入口との間の距離とテーパ部の長
さとの和Ｌ1を、第１のピンと第２のピンとの間の距離
Ｌ2に対して、Ｌ1≧Ｌ2としているので、可動部の可動
による案内ピンと案内孔との係合により可動部と固定部
との位置合わせが確実に行え、ピンの本数に拘わらず、
接触抵抗の小さい確実な接続ができ、ピン１本あたりの
通電電流値を大きくでき、着脱による接触抵抗の増加も
なく、かつピンの破損もなく、信頼性の高い着脱パワー
リードが得られる。According to the first aspect of the present invention, the guide pin having the tapered portion at the tip is provided on one of the fixed portion and the movable portion, and the guide hole that engages with the guide pin by the movement of the movable portion is provided on the fixed portion and the movable portion. The sum L 1 of the distance between the tip of the guide pin and the entrance of the guide hole and the length of the tapered portion is provided on the other side of the movable portion, and is set to the distance L 2 between the first pin and the second pin. On the other hand, since L 1 ≧ L 2 , the movable portion and the fixed portion can be surely aligned by the engagement of the guide pin and the guide hole by the movement of the movable portion, regardless of the number of pins.
A reliable connection with a small contact resistance can be made, a current value per pin can be increased, a contact resistance does not increase due to attachment / detachment, and the pin is not damaged, so that a highly reliable detachable power lead can be obtained.
【００３３】また、この発明の第２の発明によれば、超
電導コイルに励磁電流を供給するパワーリードを、第１
のピンが配設された固定部と、固定部に対向して配設さ
れた可動部と、可動部に設けられ、可動部の可動により
第１のピンと嵌脱する第２のピンと、固定部および可動
部の一方に設けられ、先端部にテーパ部を有する案内ピ
ンと、固定部および可動部の他方に設けられ、可動部の
可動により案内ピンと係合する案内孔とを備え、案内ピ
ンの先端部と案内孔の入口との間の距離とテーパ部の長
さとの和Ｌ1を、第１のピンと第２のピンとの間の距離
Ｌ2に対して、Ｌ1≧Ｌ2とする着脱パワーリードとして
いるので、ピン１本あたりの通電電流値を大きくでき、
大電流を供給できる、かつ、脱離時の常温部と低温部と
の熱的経路をほぼ完全に遮断でき、常温部からの熱侵入
を極めて小さく抑えることができる超電導磁石装置が得
られる。According to the second aspect of the present invention, the power lead for supplying the exciting current to the superconducting coil is the first
Fixed part on which the pin is arranged, a movable part arranged so as to face the fixed part, a second pin provided on the movable part and fitted into and removed from the first pin by the movement of the movable part, and the fixed part. And a guide pin that is provided on one of the movable parts and has a tapered portion at the tip, and a guide hole that is provided on the other of the fixed part and the movable part and that engages with the guide pin when the movable part is moved. Attachment / detachment power for making the sum L 1 of the distance between the portion and the inlet of the guide hole and the length of the tapered portion L 1 ≧ L 2 with respect to the distance L 2 between the first pin and the second pin. Since it is a lead, the energizing current value per pin can be increased,
It is possible to obtain a superconducting magnet device capable of supplying a large current and almost completely blocking a thermal path between a room temperature part and a low temperature part at the time of desorption, and capable of suppressing heat intrusion from the room temperature part to an extremely small level.
【図１】この発明の実施例１を示す着脱パワーリードの
着脱部の断面図である。FIG. 1 is a cross-sectional view of an attachment / detachment portion of an attachment / detachment power lead showing Embodiment 1 of the present invention.
【図２】この発明の実施例２を示す超電導磁石装置の断
面図である。FIG. 2 is a sectional view of a superconducting magnet device showing a second embodiment of the present invention.
【図３】従来の着脱パワーリードの一例を示す接続部断
面図である。FIG. 3 is a sectional view of a connecting portion showing an example of a conventional detachable power lead.
１ 可動側メスピン（第２のピン） ２ 固定側オスピン（第１のピン） ３ 案内ピン ３ａ テーパ部 ４ 案内孔 ５ 可動側コネクタ（可動部） ６ 固定側コネクタ（固定部） ２０ 真空槽 ２１ 第１輻射熱シールド ２２ 第２輻射熱シールド ２３ ヘリウム槽 ２４ 超電導コイル ２４ 着脱パワーリード 1 Movable side female pin (second pin) 2 Fixed side male pin (first pin) 3 Guide pin 3a Tapered portion 4 Guide hole 5 Movable side connector (movable part) 6 Fixed side connector (fixed part) 20 Vacuum chamber 21 No. 1 Radiant Heat Shield 22 2nd Radiant Heat Shield 23 Helium Tank 24 Superconducting Coil 24 Detachable Power Lead
【手続補正書】[Procedure amendment]
【提出日】平成４年７月２０日[Submission date] July 20, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】請求項１[Name of item to be corrected] Claim 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】請求項２[Name of item to be corrected] Claim 2
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１０[Correction target item name] 0010
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１０】[0010]
【課題を解決するための手段】この発明の第１の発明に
係る着脱パワーリードは、第１のピンが配設された固定
部と、第１のピンに嵌合する第２のピンが配設された可
動部とを対向してなる着脱部を備え、可動部の可動によ
る第１および第２のピンの嵌脱により電気的接続の開閉
を行う着脱パワーリードにおいて、先端部にテーパ部を
有する案内ピンを固定部および可動部の一方に設け、可
動部の可動により案内ピンと係合する案内孔を固定部お
よび可動部の他方に設けるとともに、案内ピンの先端部
と案内孔の入口との間の距離とテーパ部の長さとの和Ｌ
1を、第１のピンと第２のピンとの間の距離Ｌ2に対し
て、Ｌ1≦Ｌ2 とするものである。The detachable power lead according to the first aspect of the present invention includes a fixing portion on which the first pin is arranged and a second pin fitted to the first pin. In a detachable power lead that has an attaching / detaching portion that faces a provided movable portion, and that opens and closes an electrical connection by inserting and removing the first and second pins by moving the movable portion, a taper portion is provided at a tip portion. The guide pin that is provided is provided on one of the fixed portion and the movable portion, and the guide hole that engages with the guide pin when the movable portion is moved is provided on the other of the fixed portion and the movable portion. Sum of the distance between them and the length of the taper part L
1, with respect to the distance L 2 between the first pin and the second pin, it is an L 1 ≦ L 2.
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１１[Correction target item name] 0011
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１１】また、この発明の第２の発明に係る超電導
磁石装置は、超電導コイルに励磁電流を供給するパワー
リードを、第１のピンが配設された固定部と、固定部に
対向して配設された可動部と、可動部に設けられ、可動
部の可動により第１のピンと嵌脱する第２のピンと、固
定部および可動部の一方に設けられ、先端部にテーパ部
を有する案内ピンと、固定部および可動部の他方に設け
られ、可動部の可動により案内ピンと係合する案内孔と
を備え、案内ピンの先端部と案内孔の入口との間の距離
とテーパ部の長さとの和Ｌ1を、第１のピンと第２のピ
ンとの間の距離Ｌ2に対して、Ｌ1≦Ｌ2 とする着脱パワ
ーリードとするものである。Also, in the superconducting magnet device according to the second aspect of the present invention, the power lead for supplying the exciting current to the superconducting coil is disposed so as to face the fixing portion provided with the first pin and the fixing portion. A movable part that is provided, a second pin that is provided in the movable part and that is inserted into and removed from the first pin by the movement of the movable part, and a guide that is provided in one of the fixed part and the movable part and has a tapered part at the tip end. A pin, and a guide hole provided on the other of the fixed portion and the movable portion, the guide hole engaging with the guide pin when the movable portion is moved, and the distance between the tip of the guide pin and the inlet of the guide hole and the length of the tapered portion. the sum L 1 of, with respect to the distance L 2 between the first pin and the second pin, it is an detachable power lead to L 1 ≦ L 2.
【手続補正５】[Procedure Amendment 5]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１２[Correction target item name] 0012
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１２】[0012]
【作用】この発明の第１の発明においては、案内ピンの
先端部と案内孔の入口との間の距離とテーパ部の長さと
の和Ｌ1が、第１のピンと第２のピンとの間の距離Ｌ2に
対して、Ｌ1≦Ｌ2 となるように、第１および第２のピ
ン、案内ピンおよび案内孔がそれぞれ固定部および可動
部に設けられているので、可動部の可動により案内ピン
のテーパ部が案内孔に案内挿入された時点で、固定部と
可動部とが確実に位置合わせされ、その後の第１のピン
と第２のピンとの嵌合接触が確実にスムーズに行われ
る。In the first aspect of the present invention, the sum L 1 of the distance between the tip of the guide pin and the inlet of the guide hole and the length of the tapered portion is between the first pin and the second pin. Since the first and second pins, the guide pin, and the guide hole are provided in the fixed portion and the movable portion so that L 1 ≦ L 2 with respect to the distance L 2 of When the tapered portion of the guide pin is guided and inserted into the guide hole, the fixed portion and the movable portion are surely aligned with each other, and the subsequent mating contact between the first pin and the second pin is surely and smoothly performed. ..
【手続補正６】[Procedure correction 6]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１３[Correction target item name] 0013
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１３】また、この発明の第２の発明においては、
案内ピンの先端部と案内孔の入口との間の距離とテーパ
部の長さとの和Ｌ1が、第１のピンと第２のピンとの間
の距離Ｌ2に対して、Ｌ1≦Ｌ2 となるように、第１およ
び第２のピン、案内ピンおよび案内孔がそれぞれ固定部
および可動部に設けられた着脱パワーリードを用いてい
るので、可動部の可動により案内ピンのテーパ部が案内
孔に案内挿入された時点で、固定部と可動部とが確実に
位置合わせされ、その後の第１のピンと第２のピンとの
嵌合接触が確実にスムーズに行われて、接触抵抗が小さ
く抑えられ、ピンあたりの通電電流を大きくでき、さら
にパワーリードの脱離時には、常温部からの熱侵入経路
が遮断される。In the second invention of the present invention,
The sum L 1 of the distance between the tip of the guide pin and the entrance of the guide hole and the length of the tapered portion is L 1 ≦ L 2 with respect to the distance L 2 between the first pin and the second pin. Since the detachable power lead in which the first and second pins, the guide pin, and the guide hole are provided in the fixed portion and the movable portion, respectively, is used, the tapered portion of the guide pin is guided by the movement of the movable portion. When the guide part is inserted into the hole, the fixed part and the movable part are surely aligned with each other, and the subsequent mating contact between the first pin and the second pin is surely performed smoothly, and the contact resistance is suppressed to be small. Therefore, the energization current per pin can be increased, and when the power lead is detached, the heat intrusion route from the room temperature portion is cut off.
【手続補正７】[Procedure Amendment 7]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１５[Correction target item name] 0015
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１５】上記実施例１における着脱パワーリードで
は、可動側メスピン１および案内ピン３と固定側オスピ
ン２および案内孔４とがそれぞれ相対するように、かつ
案内ピン３の先端部と固定側コネクタ６（案内孔４の入
口）との間の距離（Ｌ3）とテーパ部３ａの長さ（Ｌ4）
との和Ｌ1と、可動側メスピン１と固定側オスピン２と
の間の距離Ｌ2とが、Ｌ1≦Ｌ2 の関係となるように、可
動側メスピン１、固定側オスピン２、案内ピン３、可動
側および固定側コネクタ５、６をそれぞれ配置構成して
いる。In the detachable power lead according to the first embodiment, the movable side female pin 1 and the guide pin 3 and the fixed side male pin 2 and the guide hole 4 face each other, and the tip portion of the guide pin 3 and the fixed side connector 6 respectively. Distance (L 3 ) from (inlet of guide hole 4) and length of tapered portion 3a (L 4 )
The sum L 1 and, as the distance L 2 between the movable-side female pin 1 and the fixed male pin 2, a relationship of L 1 ≦ L 2, the movable female pin 1, the fixed-side male pin 2, the guide pin 3, movable side and fixed side connectors 5 and 6 are respectively arranged.
【手続補正８】[Procedure Amendment 8]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１６[Correction target item name] 0016
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１６】つぎに、上記実施例１の動作について説明
する。駆動機構（図示せず）により可動コネクタ５が、
固定側コネクタ６方向に移動され、Ｌ1≦Ｌ2 と構成され
ているので、まず最初に案内ピン３が案内孔４に入る。
ここで、案内ピン３と案内孔４との位置がずれていて
も、テーパ部３ａが案内孔４に案内されて案内孔４内に
挿入され、テーパ部３ａが完全に案内孔４内に挿入され
た時点で、可動側コネクタ５と固定側コネクタ６との位
置合わせが完了する。さらに、可動側コネクタ５を固定
側コネクタ６方向に移動を続けると、可動側メスピン１
が固定側オスピン２に接触し始める。この時、可動側お
よび固定側コネクタ５、６同士の位置合わせが完了して
いるので、可動側メスピン１は極めて良好な接触状態を
保ちながら固定側オスピン２に嵌入されて装着される。Next, the operation of the first embodiment will be described. The movable connector 5 is moved by a drive mechanism (not shown).
Since it is moved toward the fixed side connector 6 and L 1 ≦ L 2 , the guide pin 3 first enters the guide hole 4.
Here, even if the positions of the guide pin 3 and the guide hole 4 are deviated, the tapered portion 3a is guided by the guide hole 4 and inserted into the guide hole 4, and the tapered portion 3a is completely inserted into the guide hole 4. At that time, the alignment of the movable side connector 5 and the fixed side connector 6 is completed. Further, if the movable side connector 5 continues to move toward the fixed side connector 6, the movable side female pin 1
Starts to contact the fixed male pin 2. At this time, since the positions of the movable side and fixed side connectors 5 and 6 are completed, the movable side female pin 1 is fitted and attached to the fixed side male pin 2 while maintaining a very good contact state.
【手続補正９】[Procedure Amendment 9]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１８[Correction target item name] 0018
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１８】ここで、可動側メスピン１および固定側オ
スピン２として、Ｂ１０Ｎ、Ｓ１０Ｎ接触子をそれぞれ
６個づつ用いた試験装置を作製し、液体ヘリウム温度
（１気圧下で約−２６９℃）下で測定したところ、５０
０Ａ通電時の着脱部の抵抗は、１箇所あたり５０〜１０
０μΩと小さな接触抵抗が測定され、モータ駆動による
数十回の着脱動作を繰り返した後も、この値は変化しな
かった。Here, a test apparatus using 6 pieces of B10N and 6 pieces of S10N contacts as the movable side male pin 1 and the fixed side male pin 2 was prepared, and the temperature was maintained at a liquid helium temperature (about -269 ° C. under 1 atmospheric pressure). When measured, 50
The resistance of the attachment / detachment part at the time of 0 A energization is 50-10
A contact resistance as small as 0 μΩ was measured, and this value did not change even after repeating several tens of attachment / detachment operations by driving the motor.
【手続補正１０】[Procedure Amendment 10]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２６[Correction target item name] 0026
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００２６】このように、上記実施例２によれば、案内
ピン３の先端部と固定側コネクタ６との間の距離
（Ｌ3）とテーパ部３ａの長さ（Ｌ4）との和（Ｌ1）≦
可動側メスピン１と固定側オスピン２との間の距離（Ｌ
2）となるように、可動側コネクタ５に可動側メスピン
１およびテーパ部３ａを有する案内ピン３を設け、固定
側コネクタ６に固定側オスピン２および案内孔４を設け
た着脱パワーリードを備え、超電導コイルに励磁電流を
供給するようにしているので、ピン１本あたりの通電電
流値を大きくでき、大電流を供給できる、かつ、脱離時
の常温部と低温部との熱的経路をほぼ完全に遮断でき、
常温部からの熱侵入を極めて小さく抑えることができる
超電導磁石装置が得られるという効果がある。As described above, according to the second embodiment, the sum of the distance (L 3 ) between the tip of the guide pin 3 and the fixed connector 6 and the length (L 4 ) of the tapered portion 3a ( L 1 ) ≤
The distance between the movable female pin 1 and the fixed male pin 2 (L
2 ), the movable side connector 5 is provided with the movable side female pin 1 and the guide pin 3 having the tapered portion 3a, and the fixed side connector 6 is provided with the detachable power lead having the fixed side male pin 2 and the guide hole 4. Since the exciting current is supplied to the superconducting coil, the energizing current value per pin can be increased, a large current can be supplied, and the thermal path between the room temperature part and the low temperature part during desorption is almost Can be completely shut off,
There is an effect that it is possible to obtain a superconducting magnet device in which heat intrusion from a room temperature portion can be suppressed to an extremely small level.
【手続補正１１】[Procedure Amendment 11]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００３２[Name of item to be corrected] 0032
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００３２】この発明の第１の発明によれば、先端部に
テーパ部を有する案内ピンを固定部および可動部の一方
に設け、可動部の可動により案内ピンと係合する案内孔
を固定部および可動部の他方に設けるとともに、案内ピ
ンの先端部と案内孔の入口との間の距離とテーパ部の長
さとの和Ｌ1を、第１のピンと第２のピンとの間の距離
Ｌ2に対して、Ｌ1≦Ｌ2 としているので、可動部の可動
による案内ピンと案内孔との係合により可動部と固定部
との位置合わせが確実に行え、ピンの本数に拘わらず、
接触抵抗の小さい確実な接続ができ、ピン１本あたりの
通電電流値を大きくでき、着脱による接触抵抗の増加も
なく、かつピンの破損もなく、信頼性の高い着脱パワー
リードが得られる。According to the first aspect of the present invention, the guide pin having the tapered portion at the tip is provided on one of the fixed portion and the movable portion, and the guide hole that engages with the guide pin by the movement of the movable portion is provided on the fixed portion and the movable portion. The sum L 1 of the distance between the tip of the guide pin and the entrance of the guide hole and the length of the tapered portion is provided on the other side of the movable portion, and is set to the distance L 2 between the first pin and the second pin. On the other hand, since L 1 ≦ L 2 , the movable portion and the fixed portion can be reliably aligned by the engagement of the guide pin and the guide hole by the movement of the movable portion, regardless of the number of pins.
A reliable connection with a small contact resistance can be made, a current value per pin can be increased, a contact resistance does not increase due to attachment / detachment, and the pin is not damaged, so that a highly reliable detachable power lead can be obtained.
【手続補正１２】[Procedure Amendment 12]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００３３[Correction target item name] 0033
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００３３】また、この発明の第２の発明によれば、超
電導コイルに励磁電流を供給するパワーリードを、第１
のピンが配設された固定部と、固定部に対向して配設さ
れた可動部と、可動部に設けられ、可動部の可動により
第１のピンと嵌脱する第２のピンと、固定部および可動
部の一方に設けられ、先端部にテーパ部を有する案内ピ
ンと、固定部および可動部の他方に設けられ、可動部の
可動により案内ピンと係合する案内孔とを備え、案内ピ
ンの先端部と案内孔の入口との間の距離とテーパ部の長
さとの和Ｌ1を、第１のピンと第２のピンとの間の距離
Ｌ2に対して、Ｌ1≦Ｌ2 とする着脱パワーリードとして
いるので、ピン１本あたりの通電電流値を大きくでき、
大電流を供給できる、かつ、脱離時の常温部と低温部と
の熱的経路をほぼ完全に遮断でき、常温部からの熱侵入
を極めて小さく抑えることができる超電導磁石装置が得
られる。According to the second aspect of the present invention, the power lead for supplying the exciting current to the superconducting coil is the first
Fixed part on which the pin is arranged, a movable part arranged so as to face the fixed part, a second pin provided on the movable part and fitted into and removed from the first pin by the movement of the movable part, and the fixed part. And a guide pin that is provided on one of the movable parts and has a tapered portion at the tip, and a guide hole that is provided on the other of the fixed part and the movable part and that engages with the guide pin when the movable part is moved. Attachment / detachment power that makes the sum L 1 of the distance between the portion and the inlet of the guide hole and the length of the tapered portion L 1 ≦ L 2 with respect to the distance L 2 between the first pin and the second pin. Since it is a lead, the energizing current value per pin can be increased,
It is possible to obtain a superconducting magnet device capable of supplying a large current and almost completely blocking a thermal path between a room temperature part and a low temperature part at the time of desorption, and capable of suppressing heat intrusion from the room temperature part to an extremely small level.
Claims (2)
第１のピンに嵌合する第２のピンが配設された可動部と
を対向してなる着脱部を備え、前記可動部の可動による
前記第１および第２のピンの嵌脱により電気的接続の開
閉を行う着脱パワーリードにおいて、先端部にテーパ部
を有する案内ピンを前記固定部および前記可動部の一方
に設け、前記可動部の可動により前記案内ピンと係合す
る案内孔を前記固定部および前記可動部の他方に設ける
とともに、前記案内ピンの先端部と前記案内孔の入口と
の間の距離と前記テーパ部の長さとの和Ｌ1を、前記第
１のピンと前記第２のピンとの間の距離Ｌ2に対して、
Ｌ1≧Ｌ2としたことをことを特徴とする着脱パワーリー
ド。1. An attachment / detachment portion comprising a fixed portion provided with a first pin and a movable portion provided with a second pin fitted to the first pin, which face each other. In a detachable power lead that opens and closes an electrical connection by inserting and removing the first and second pins by moving the movable portion, a guide pin having a tapered portion at the tip is provided on one of the fixed portion and the movable portion. A guide hole that engages with the guide pin by moving the movable portion is provided in the other of the fixed portion and the movable portion, and the distance between the tip of the guide pin and the inlet of the guide hole and the taper portion. And the sum L 1 with respect to the distance L 2 between the first pin and the second pin,
A detachable power lead characterized in that L 1 ≧ L 2 .
て設けられた輻射熱シールドと、前記輻射熱シールドを
包囲して設けられた真空槽と、前記ヘリウム槽内に収納
された超電導コイルと、前記超電導コイルに励磁電流を
供給するパワーリードとを有する超電導磁石装置におい
て、前記パワーリードは、第１のピンが配設された固定
部と、前記固定部に対向して配設された可動部と、前記
可動部に設けられ、前記可動部の可動により前記第１の
ピンと嵌脱する第２のピンと、前記固定部および前記可
動部の一方に設けられ、先端部にテーパ部を有する案内
ピンと、前記固定部および前記可動部の他方に設けら
れ、前記可動部の可動により前記案内ピンと係合する案
内孔とを備え、前記案内ピンの先端部と前記案内孔の入
口との間の距離と前記テーパ部の長さとの和Ｌ1を、前
記第１のピンと前記第２のピンとの間の距離Ｌ2に対し
て、Ｌ1≧Ｌ2とする着脱パワーリードとしたことを特徴
とする超電導磁石装置。2. A helium bath, a radiant heat shield surrounding the helium bath, a vacuum bath surrounding the radiant heat shield, a superconducting coil housed in the helium bath, In a superconducting magnet device having a power lead for supplying an exciting current to a superconducting coil, the power lead includes a fixed portion on which a first pin is arranged and a movable portion opposed to the fixed portion. A second pin that is provided on the movable portion and that is fitted into and removed from the first pin by the movement of the movable portion; and a guide pin that is provided on one of the fixed portion and the movable portion and has a tapered portion at a tip end portion, A guide hole that is provided on the other of the fixed portion and the movable portion and that engages with the guide pin when the movable portion moves, and a distance between a tip end portion of the guide pin and an inlet of the guide hole and the guide hole. A superconducting magnet, wherein a sum L 1 of the lengths of the tapered portions is a detachable power lead satisfying L 1 ≧ L 2 with respect to a distance L 2 between the first pin and the second pin. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1519892A JP2930464B2 (en) | 1992-01-30 | 1992-01-30 | Detachable power lead and superconducting magnet device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1519892A JP2930464B2 (en) | 1992-01-30 | 1992-01-30 | Detachable power lead and superconducting magnet device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05217743A true JPH05217743A (en) | 1993-08-27 |
| JP2930464B2 JP2930464B2 (en) | 1999-08-03 |
Family
ID=11882172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1519892A Expired - Fee Related JP2930464B2 (en) | 1992-01-30 | 1992-01-30 | Detachable power lead and superconducting magnet device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2930464B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1923713A1 (en) | 2006-11-17 | 2008-05-21 | Hitachi, Ltd. | Superconductive magnet device and magnetic resonance imaging apparatus |
| JP2011238840A (en) * | 2010-05-12 | 2011-11-24 | Japan Superconductor Technology Inc | Superconducting magnet device |
| JP2014212256A (en) * | 2013-04-19 | 2014-11-13 | 株式会社神戸製鋼所 | Cryostat |
| CN109243754A (en) * | 2018-12-04 | 2019-01-18 | 湖南迈太科医疗科技有限公司 | Current down-lead structure and superconducting magnet |
-
1992
- 1992-01-30 JP JP1519892A patent/JP2930464B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1923713A1 (en) | 2006-11-17 | 2008-05-21 | Hitachi, Ltd. | Superconductive magnet device and magnetic resonance imaging apparatus |
| US7528605B2 (en) | 2006-11-17 | 2009-05-05 | Hitachi, Ltd. | Superconductive magnet device and magnetic resonance imaging apparatus |
| JP2011238840A (en) * | 2010-05-12 | 2011-11-24 | Japan Superconductor Technology Inc | Superconducting magnet device |
| JP2014212256A (en) * | 2013-04-19 | 2014-11-13 | 株式会社神戸製鋼所 | Cryostat |
| CN109243754A (en) * | 2018-12-04 | 2019-01-18 | 湖南迈太科医疗科技有限公司 | Current down-lead structure and superconducting magnet |
| WO2020114065A1 (en) * | 2018-12-04 | 2020-06-11 | 湖南迈太科医疗科技有限公司 | Current lead structure, and superconducting magnet |
| CN109243754B (en) * | 2018-12-04 | 2023-10-27 | 湖南迈太科医疗科技有限公司 | Current lead structure and superconducting magnet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2930464B2 (en) | 1999-08-03 |
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