JPS6098690A - Cryostat - Google Patents
CryostatInfo
- Publication number
- JPS6098690A JPS6098690A JP58205906A JP20590683A JPS6098690A JP S6098690 A JPS6098690 A JP S6098690A JP 58205906 A JP58205906 A JP 58205906A JP 20590683 A JP20590683 A JP 20590683A JP S6098690 A JPS6098690 A JP S6098690A
- Authority
- JP
- Japan
- Prior art keywords
- safety valve
- cryostat
- valve
- coil
- internal pressure
- 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
Links
- 230000002159 abnormal effect Effects 0.000 claims abstract description 6
- 239000002826 coolant Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 12
- 239000001307 helium Substances 0.000 abstract description 8
- 229910052734 helium Inorganic materials 0.000 abstract description 8
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract description 8
- 238000011084 recovery Methods 0.000 abstract description 6
- 238000007664 blowing Methods 0.000 abstract description 3
- 230000003578 releasing effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000010791 quenching Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 241000951471 Citrus junos Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 210000003056 antler Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の技術／７）！Ｌ！ｆ］
本発明ｌｌ−を極低温にて使用する’！’（１′Ｉｉ＋
： ；ｉ、乍コイルを冷却ρす体中に浸漬するためのイ
φ（低温容器（クライオスタット）にかかり、特に安全
弁の改良に１９４するものである。[Detailed description of the invention] [Technology of the invention/7)! L! f] Use of the present invention at extremely low temperatures'! '(1'Ii+
: ; i, φ (low temperature vessel (cryostat)) for immersing the coil in a cooling body, and is particularly useful for improving safety valves.
し発明の技術的背負ｔとその問題点］１一般に（α低温
にて使用するＭｉ ′１１１、魯コイル（以下単にコイ
ルと月−ぶ）は、クライオスタット内の冷却媒体例えば
液体ヘリウム（ＬＨｅ）に浸漬されて極低温を保ちなが
ら通電され、通電中に発生するヘリウムガス（ＧＨｅ）
はガス回収装置に導かれる。[Technical burden of the invention and its problems] 1. In general, the Mi '111 and Lu coils (hereinafter simply referred to as coils and coils) used at low temperatures are Helium gas (GHe) is generated while being immersed in electricity while maintaining an extremely low temperature.
is directed to a gas recovery device.
コイルの通電中にコイル電流の急激なしゃ断やコイル特
性劣化等によりクライオスタット内での発熱景が増加す
ると、 ＧＨｅの発生量も増加しガス回収装置が追従出
来ずにクライオスタット内圧が増大することがある。If the heat generation inside the cryostat increases due to a sudden cutoff of the coil current or deterioration of the coil characteristics while the coil is energized, the amount of GHe generated will also increase, and the gas recovery device may not be able to follow it, causing the internal pressure of the cryostat to increase. .
クライオスタットの内圧が異常に増加するとクライオス
タンドの破裂に至ることも治り、危険なので、通常は安
全弁を用いて内圧異席上昇時ＧＨｅを大気中へ放出して
いる。If the internal pressure of the cryostat increases abnormally, it may cause the cryostand to burst, which is dangerous, so a safety valve is normally used to release GHe into the atmosphere when the internal pressure rises abnormally.
このようなりライオスタットは内圧上昇時は安全弁が作
動して、異常上昇を防止することが出来るが、（ｌＨｅ
の大気放出中に安全弁に大気中の水分が付着して霜とな
り、この１１ｆが内圧Ｉ！ｊＪイシ後の復旧作業の障害
となることがある。In this way, when the internal pressure of the lyostat increases, the safety valve operates to prevent an abnormal increase, but (lHe
Moisture in the atmosphere adheres to the safety valve during release to the atmosphere and forms frost, and this 11f becomes the internal pressure I! This may become a hindrance to recovery work after the JJ issue.
第１図に安全弁を有するクライオスタットの一般的な構
成を示す。FIG. 1 shows the general configuration of a cryostat with a safety valve.
第１図（：おいて、クライオスタット１内のＬＨｅ２中
には超π１−導コイル３が浸漬さノ１、コイル３の発熱
寸た４外部からの熱ｆう入によＩＪ Ｌｌ−１ｅ ２が
蒸発するとＯＨｅ ４となり、クライオスタット内上部
に’ＢＮ′（す、通常は配管５を経由してヘリウムガス
回収装置ｊｑ、 ６で回収される。In Figure 1 (:), the ultra-π1-conducting coil 3 is immersed in the LHe2 inside the cryostat 1, and the IJ Ll-1e 2 is caused by the amount of heat generated by the coil 3 and the heat input from the outside. When it evaporates, it becomes OHe 4, which is collected in the upper part of the cryostat by a helium gas recovery device (6) via a pipe (5).
コイル３の発熱（１ｊが増加してクライオスタット内の
Ｏｌ ｅ圧が所だの値よｌψＩ加すると、安全弁７から
大気８（： Ｇ１−１ｃを放出し内圧の６’＋Ｅ、鹿上
昇を防止する。When the heat generation (1j) of the coil 3 increases and the Ole pressure in the cryostat increases to a certain value, the safety valve 7 releases the atmosphere 8 (: G1-1c), which prevents the internal pressure from rising by 6'+E. .
一般り月］いられ、る安全弁の（ＩＩＩ竜を第２図に示
す。The safety valve (III) is shown in Figure 2.
安全弁の２ｊ１人ロアａをタライメスタットに接和１し
たとき、（ｔ）Ｉｅ圧力が油気孔７ｂを１・１１トして
いるストツバ７Ｃを州１えているコイルバネ７ｄの押ノ
ヒカを超】１」すると、ストッパ７Ｃが押さｉｌ、て通
ブ孔７ｂンシ、開き、Ｇ１１ｅ ｉづＪ（ｉ１気ロアｅ
から大気中に）１υ出智ハ、２）。When the safety valve's 2j lower a is connected to the taimestat, (t) Ie pressure exceeds the pressure of the coil spring 7d which holds the stop spring 7C which is in contact with the oil hole 7b.]1 "Then, the stopper 7C is pressed, the through hole 7b opens, and the lower
from the atmosphere) 1υ out of the atmosphere, 2).
安全弁作動中に安全ヲＰから放出バれる（ＩＨｅ ｉｊ
クー全弁７および削性５に強い冷）ζ１ｊ仕用を及はず
ので、大気中の水分が多−′Ｉ′ｌＩのλ１１となる。Release from the safety valve while the safety valve is operating (IHe ij
Since the cooling force ζ1j, which is strong against the cooling valve 7 and the machinability 5, should be exerted, the moisture in the atmosphere becomes λ11 of the amount -'I'lI.
この：（１）が、ストッパ７Ｃのガイド７ｆに付着する
と、クライオスタット内圧が回複してコイルバイ・７ｄ
の押圧力が加えられていても、ガイド７ｆが移動出来ず
安全弁Ｖｉ動作した捷まとなる。When this: (1) adheres to the guide 7f of the stopper 7C, the internal pressure of the cryostat is repeated and the coil-by 7d
Even if a pressing force of 1 is applied, the guide 7f cannot move and the safety valve Vi is activated.
以上のように従来の安全弁を有するクライオスタットで
に、内圧異常上昇によって安全弁が作動した後、内圧が
回復（低下）しても、安全弁に１１１が付着し、安全弁
自身の＋１）閉塞が兄全になされないことがある。As mentioned above, in a cryostat with a conventional safety valve, after the safety valve is activated due to an abnormal increase in internal pressure, even if the internal pressure recovers (reduces), 111 is attached to the safety valve, and the safety valve itself is blocked by +1). There are things that are not done.
このため、クライオスタット内圧が回ゆしても、安全弁
が開状態のままになり、クライオスタット内の全ＬＨｅ
が蒸発して大気中に放出される。Therefore, even if the internal pressure of the cryostat changes, the safety valve remains open and all LHe in the cryostat is
evaporates and is released into the atmosphere.
また安全弁の閉塞が遅れると１周しく１温度の変動によ
る呼吸作用によってクライオスタット内に空気が吸込ま
れ、これによって空気中の水分がコイル表υ■１に付着
（結氷）することがある。Furthermore, if the safety valve is delayed in closing, air will be sucked into the cryostat due to the breathing effect due to temperature fluctuations over one cycle, and this may cause moisture in the air to adhere (freeze) to the coil surface υ■1.
クライオスタット内に空気が吸込まｔ＋、 ｆｃ ｇに
安全弁を閉基し、ＬＨｅを再注入すると、コイル２〈面
に付着した結氷はそのまま残り、コイル表面がＬｌ−１
ｅと重接接触しなくなって冷却効果が低下する。When air is sucked into the cryostat and the safety valve is closed at t+, fc g, and LHe is re-injected, the ice that adhered to the coil 2 surface remains as it is, and the coil surface becomes Ll-1.
Since there is no heavy contact with e, the cooling effect decreases.
この状態でコイル電流をθＩＣすと、氷の付着した部分
のコイル温度が上昇して常電導に転移する所謂クエンチ
現象を生じ、超電、導コーｒルとして使えないことにな
る。If the coil current is changed to θIC in this state, a so-called quench phenomenon occurs in which the temperature of the coil increases in the portion where ice has adhered and the coil changes to normal conductivity, making it unusable as a superconducting or conducting coil.
クエンチ現象発生をｖノ止するに仁１クジイオスタット
内の十分な再乾操が必要であり、このために多大な時間
と経費を要する。In order to stop the occurrence of the quench phenomenon, it is necessary to thoroughly re-dry the inside of the quenchiostat, which requires a great deal of time and expense.
すなわち安全弁作動後クライオスタット内圧回イリ時に
速やかに安全弁の再閉？〜が必要であるが、従来の）：
ｔ？） ３７Ｊでは１′■１の付着−を防止出来ず、上
記したかｉ々の間層（を生じている。In other words, is the safety valve immediately reclosed when the cryostat internal pressure is restored after the safety valve is activated? ~ is required, but conventional):
T? ) 37J cannot prevent the adhesion of 1' and 1, and the above-mentioned interlayer (i) is formed.
［発明の目的］
本発明はクライオスタットの内圧￥１’、 ’帛上昇促
生による安全弁作動後、内圧回ツｊノ時に１虫やかに安
全５１゛が杓閉？、’ｌｑ して、クライオスタット内
のＬＨｅの無駄な蒸発や外気の没入を防止する合」す１
的なクライオスタットを保有（することを目的としてい
る。[Purpose of the invention] The present invention provides an internal pressure of a cryostat of ¥1', and after the safety valve is activated by accelerating the rise, the safety level of 51' closes instantly when the internal pressure is turned around. ,'lq to prevent unnecessary evaporation of LHe in the cryostat and intrusion of outside air.
The purpose is to have a cryostat of the same type.
［発明の柚、要］
奉を明Ｑづ、内部冷却！１？１体の一１！゛６常Ｌ１−
カガスを放出する安全弁をイ〕するクライオスタットに
おいて、安７１）弁に温風を吹付けて安全フ１゛を加熱
し安全弁が′４，１によって固、′＃、するのを防止、
するτＴ１’Ａ ｌｌ１１．ｔ、送ｊ虱機と、安全弁の
放出動作オたは内部冷却媒体の異常圧力を杉・出して温
風送風板を起動させる起動回路を備え、こノ゛１によっ
て放出０ノ作後の安全弁の再閉２〈動作を砕実にしたも
のである。[Yuzu of Invention, Kaname] Light Qzu, internal cooling! 1? 1 of 1!゛6 always L1-
In a cryostat with a safety valve for releasing gas, blow hot air to the safety valve to heat the safety valve to prevent the safety valve from becoming hard due to the safety valve.
τT1'A ll11. Equipped with a blower and a starting circuit that releases the safety valve's release operation or the abnormal pressure of the internal cooling medium to start the warm air blower plate, and this item 1 allows the safety valve to be activated after the release is zero. Re-closing 2 (this is a more detailed version of the operation).
［発明の実施例］
本発明の一実力１１例を第３図に示す。第３図において
第１図と同一部分は同一記号で示している。[Embodiments of the Invention] FIG. 3 shows 11 examples of the effectiveness of the present invention. In FIG. 3, the same parts as in FIG. 1 are indicated by the same symbols.
第３図において、クライオスタット内圧ニ接点付■、力
検出器用にカムされ内圧が安全弁動作値を超過すると接
点１０ａが閉じて安全弁７に温風を吹イ弓ける？７八Ｊ
虱送Ｊ虱根１１を起Ｄ１力゛する。In Fig. 3, the cryostat has two internal pressure contacts (1), and when the internal pressure exceeds the safety valve operating value, the contact 10a closes and warm air is blown to the safety valve 7. 78J
Activate D1 to send 11 roots.
温風が安全弁７に吹イ」られると、安全弁作動中にＧＨ
ｅによる冷囚１作用が生じても、安全弁７の周１ｉｒｌ
にｆ’ｌ”ｈ２した大気中の水分が結氷するのが防止さ
れ内圧回復時安全弁７け自ｄｌｂ的に再［メーｊ基して
０１１ｅの大気への放出および外気の侵入を阻止する。When hot air is blown into the safety valve 7, the GH is activated while the safety valve is operating.
Even if the cold prison 1 effect due to e occurs, the circumference 1irl of the safety valve 7
When the internal pressure is restored, the moisture in the atmosphere is prevented from freezing, and when the internal pressure is restored, the safety valve 7 automatically closes again to prevent the release of 011e to the atmosphere and the intrusion of outside air.
すなわち本実施例（−よる構成では、安全弁動作後、ク
ライオスタット内圧が回復（低下）した時、安全弁が自
動的に再閉塞するので、 ０１ｌｅの大気への放出）べ
−を節約出来ると同時に、クライオスタツト内への大シ
の侵入をも１ｉ）４止できる。In other words, this embodiment (in the configuration according to -, when the internal pressure of the cryostat recovers (reduces) after the safety valve operates, the safety valve automatically closes again, so that the release of 01le to the atmosphere) can be saved. It can also prevent large particles from entering the tattoo.
大気の↑ジ入がｌＳｉ＋止出来るの−Ｃ１コイルに水分
が付治せず、水分の結氷も生じない。こオＬにより１Ｆ
）ｊ１ｒドｔｌｉ時のコイルに付着した氷による冷却効
果低下がノ皇因となるクウェンチも発生することがなく
なり、再乾燥も不要となり、デ１１転経イ′（の節約と
、能率的なユ軍転が１−１止となる。Is it possible to stop the atmospheric air from entering lSi+? - Moisture does not cure in the C1 coil, and no water freezes. 1F by KooL
) Quenching, which is the cause of a decrease in the cooling effect due to ice adhering to the coil during J1R and TLI, no longer occurs, and re-drying is no longer necessary, saving on de-11 transitions and increasing efficiency. The battle ended at 1-1.
第４図に木＠す」の他の実施（？！ｉ ’ａ：示す。第
４１ン１は安全弁７０動作に＝ ａ１ツノするりミツト
スイッチ１２を取付け、リミットスイッチ１２によって
温ｊ虱送ｊ戦拭１１をｆ弓ｒｉｉ力＋ ’Ｉ’ｆｉ止メ
ーＦ！こるようにしｋもので４ブリ、第３は１とｆｉｌ
ｅスｌｌ来が債ら才りる。Fig. 4 shows another implementation of ``Thursday'' (?! i 'a: Shown. The 41st N1 is the safety valve 70 operation = A1 Antler Mitswitch 12 is installed, and the limit switch 12 allows the temperature to be sent. Senki 11 is f bowrii force + 'I'fi stop me F!K is 4 buri, the third is 1 and fil
The e-slil comes from debt.
なお上記の実施例では、目１ｊｌ） イリツ１１：式の
安全弁を用いた当合について説明したが、手ｌ１ＩＩＩ
伎帰式の安全弁を用いたｊ）４合にも木’ｉｂ Ｌｌｔ
Ｊのｉｆ’ｆ月１が４１０１；である０「うれ明の効果
」
以上説明したように本発明によ八に１″、内Ｆ’ｄ（（
’６却ｆｉｌ／体の異常圧力ガスを放出する安全弁をイ
ｊ′するクライオスタットにおいて、安全−ｉｐの放出
４ｉ１）作Ｉ１．１に温風を吹付けて安全弁を加熱して
いるので、安全弁が１゛バの付佑−によって固りｔｌす
ることなく、内ハ１房イ０力が正゛１・Ｒに１カ帰する
と回ｌｌ−１ｒに安全弁が１「Ｌちに閉り、′。In addition, in the above embodiment, the explanation was made using the safety valve of formula 1jl) 11:, but
J) Using a safety valve of the Kiki style
If'f month 1 of J is 4101; 0 ``effect of brightness'' As explained above, according to the present invention, 1'', within F'd ((
In a cryostat, the safety valve is heated by blowing hot air into the safety-IP release 4i1) I1.1, so the safety valve is When the inner force of the inner chamber 1 returns to the positive 1.R without being stiffened due to the installation of the 1-bar, the safety valve at the 1-1 r immediately closes.
され、４智、ガスがメ・１シ駄に外（（中にｈシ出さえ
したり、昇速（が内ｉ７１＋に侵入ず２）のが１（１ｊ
止さｉｌ、クライオスタットのべ）却効果を安全に保持
することができ４）０4th knowledge, the gas did not go outside ((h) inside, and the acceleration (but did not enter the i71+ inside 2) was 1(1j
The cooling effect of the cryostat can be safely maintained4)0
第１図は七ｒ：来のクライオスタットσ）−ｊｒｌｌ
ヲ示ス構成図、第２図を；［安全弁の１山陥イＩい１４
．を示すＩ４ｊ［面図、第３し］は本発明の一実施例を
７１りす怜成し１、第４図は本発明の他の実ｈｉＱ ９
１１を示す４１’ｉ Ｊ人口で２ｆ・る。
１・・・クライオスタンド
２・油体ヘリウム（Ｌｌｌｅ） ３・・紹ｉｉ：’：
２ｊ’ｈコイル４・・ヘリウムガス（Ｕｔｌｅ） ５・
・配％゛（逼 ヘリウムガス回収装置１（７・安全弁８
外気 １（）・・・俤点イ：１圧力４すｒ １１．１
’＜：ｊｒｌｌ・・・τｈ１冑虱送凧４羨 １２・・
リミットスイッチ化」−１・人 グ「坤士 則 近 屋
佑Ｃｌ’ｉか１名）治２図
第 ４ 図Figure 1 shows 7r: the next cryostat σ)-jrll
The configuration diagram shown in Figure 2 is shown below;
．． I4j [front view, No. 3] showing one embodiment of the present invention is shown in Fig. 1, and Fig. 4 shows another embodiment of the present invention.
2f・ru with 41'i J population showing 11. 1. Cryostand 2. Oil body helium (Llle) 3.. Introduction ii:':
2j'h coil 4... Helium gas (Utle) 5.
・Distribution percentage゛(〼 Helium gas recovery device 1
Outside air 1 () ... Point A: 1 pressure 4 sr 11.1
'<: jrll...τh1 Kite-sending kite 4 envy 12...
``Limit switch conversion'' - 1. ``Konshi Nori Chikaya Yu Cl'i or 1 person) Ji 2 Figure 4
Claims (1)
クライオスタットにおいて、上記安全弁に温風を吠角け
て安全弁を加熱する温風送風機と、上記安全弁の放出動
作またｔｆＪ上記内部冷却媒体の異常圧力を検出して上
記温Ｊ虱迭凧磯を起動させる起ｄＩｈ Ｉｃｊ回路を（
ｎ！ｉえたことを特徴とするクライオスタットIn a cryostat that has a safety valve that releases abnormal pressure gas from the internal cooling medium, there is a hot air blower that blows hot air into the safety valve to heat the safety valve, a release operation of the safety valve, and an abnormal pressure of the internal cooling medium. (
n! A cryostat characterized by the following features:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58205906A JPS6098690A (en) | 1983-11-04 | 1983-11-04 | Cryostat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58205906A JPS6098690A (en) | 1983-11-04 | 1983-11-04 | Cryostat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6098690A true JPS6098690A (en) | 1985-06-01 |
Family
ID=16514708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58205906A Pending JPS6098690A (en) | 1983-11-04 | 1983-11-04 | Cryostat |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6098690A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5906102A (en) * | 1996-04-12 | 1999-05-25 | Helix Technology Corporation | Cryopump with gas heated exhaust valve and method of warming surfaces of an exhaust valve |
| CN102169745A (en) * | 2010-01-20 | 2011-08-31 | 琳德股份公司 | Methods for recovering helium |
| EP2355114A3 (en) * | 2010-01-27 | 2012-07-25 | Linde Aktiengesellschaft | Helium filling methods |
-
1983
- 1983-11-04 JP JP58205906A patent/JPS6098690A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5906102A (en) * | 1996-04-12 | 1999-05-25 | Helix Technology Corporation | Cryopump with gas heated exhaust valve and method of warming surfaces of an exhaust valve |
| CN102169745A (en) * | 2010-01-20 | 2011-08-31 | 琳德股份公司 | Methods for recovering helium |
| EP2348267A3 (en) * | 2010-01-20 | 2012-07-25 | Linde Aktiengesellschaft | Methods for recovering helium |
| EP2355114A3 (en) * | 2010-01-27 | 2012-07-25 | Linde Aktiengesellschaft | Helium filling methods |
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