JPH0230193B2 - - Google Patents
Info
- Publication number
- JPH0230193B2 JPH0230193B2 JP59007178A JP717884A JPH0230193B2 JP H0230193 B2 JPH0230193 B2 JP H0230193B2 JP 59007178 A JP59007178 A JP 59007178A JP 717884 A JP717884 A JP 717884A JP H0230193 B2 JPH0230193 B2 JP H0230193B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- container
- partition member
- cryogenic
- inner container
- 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.)
- Expired - Lifetime
Links
- 238000005192 partition Methods 0.000 claims description 27
- 239000003507 refrigerant Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 18
- 239000001307 helium Substances 0.000 description 6
- 229910052734 helium Inorganic materials 0.000 description 6
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- SWQJXJOGLNCZEY-NJFSPNSNSA-N helium-6 atom Chemical compound [6He] SWQJXJOGLNCZEY-NJFSPNSNSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects 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
- 239000011810 insulating material Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000009291 secondary effect Effects 0.000 description 1
Landscapes
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明の極低温寒剤を収納する内容器と、この
内容器を断熱的に包囲する常温の外容器と、内容
器から外容器に連結された水平あるいは水平に近
しガス放出用の配管とを有する極低温容器に関
し、特にこの水平配管を通して極低温寒剤を収納
する内容器内への熱侵入を著しく低減した極低温
容器に関するものである。[Detailed Description of the Invention] [Industrial Application Field] An inner container that stores the cryogenic cryogen of the present invention, an outer container at normal temperature that adiabatically surrounds this inner container, and a container that is connected from the inner container to the outer container. The present invention relates to a cryogenic container having horizontal or near-horizontal piping for gas discharge, and particularly relates to a cryogenic container that significantly reduces heat intrusion through the horizontal piping into an inner container housing a cryogenic refrigerant.
従来の極低温容器特に超電導コイルを収納する
寒剤の液体ヘリウム容器のガス放出管は、一般に
容器の上向きに取付けられるのが普通である。
The gas discharge tube of a conventional cryogenic container, particularly a cryogen liquid helium container housing a superconducting coil, is generally mounted upward in the container.
ところが、配管を容器の上部に取付ける断熱空
間の余裕が全くないような極低温容器では、寒剤
を収納する内容器と断熱空間をはさんで包囲する
常温の外容器間を水平あるいは水平に近い配管で
連結さざるを得ない。このような構成では、配管
の両端に非常に大きな温度差（内容器側で−269
℃、外容器側で20℃）がつくため、配管内にガス
流が自然発生する。このため、外容器側から内容
器側へ暖かい気体が移動することによつて熱が運
び込まれる。この熱は内容器内の液体ヘリウムを
蒸発させ、冷凍の損失として無視できない程大き
くなる。特に配管の口径が大きい程管内の自然対
流も強く、熱損失も大きい。
However, in cryogenic containers where there is no insulated space to install piping at the top of the container, horizontal or near-horizontal piping is required between the inner container that stores the cryogen and the outer container at room temperature that surrounds the insulated space. I have no choice but to connect them. In such a configuration, there is a very large temperature difference between both ends of the piping (-269° on the inner vessel side).
℃, and 20℃ on the outer container side), a gas flow naturally occurs within the piping. Therefore, heat is carried in by the movement of warm gas from the outer container side to the inner container side. This heat evaporates the liquid helium in the inner container, and the loss of refrigeration becomes too large to be ignored. In particular, the larger the diameter of the pipe, the stronger the natural convection within the pipe, and the greater the heat loss.
本発明は上記の点に鑑み、配管内における自然
対流を抑制し、自然対流による熱損失を大幅に低
減することを目的としたものである。 In view of the above points, the present invention aims to suppress natural convection within piping and significantly reduce heat loss due to natural convection.
上記目的は配管中に管長手方向に沿つて支持体
を設け、その支持体の管長手方向の複数位置に、
ばね作用を付随した仕切部材を配管内壁とは間隙
をもつて設けて、（従つて仕切部材は管路を密閉
しない）該配管内における自然対流を該仕切部材
にて複数に分割することにより達成される。
The above purpose is to provide a support body along the length of the pipe in the pipe, and to provide support at multiple positions along the length of the pipe.
Achieved by providing a partition member with a spring action with a gap from the inner wall of the pipe (therefore, the partition member does not seal the pipe) and dividing the natural convection within the pipe into multiple parts using the partition member. be done.
上記構成により本来なら生じてしまう大きな自
然対流ループは小分けされて対流が抑制される。
またそれとともに内容器で気化した寒剤が大量に
放出されるときだけ仕切部材がばね力に抗して開
く。
With the above configuration, the large natural convection loop that would normally occur is subdivided and convection is suppressed.
At the same time, the partition member opens against the spring force only when a large amount of the cryogen vaporized in the inner container is released.
管路は高温部（常温部）と低温部（極低温部）
とを結ぶ為、仕切部材がなければ大きな自然対流
のループが管路内に形成されて侵入熱も大きくな
るところ、本発明によりこの大きな自然対流を複
数に分割、つまり段階的に分割することから侵入
は減少することになる。 The pipeline has a high temperature section (normal temperature section) and a low temperature section (cryogenic section)
If there were no partition member, a large natural convection loop would be formed in the pipe, which would increase the amount of heat intrusion.However, with the present invention, this large natural convection is divided into multiple parts, that is, divided in stages. Invasions will be reduced.
加えて仕切部材は自然対流を分割するものゆえ
に管路内長手方向に複数の小さな自然対流が形成
される程度に管内壁とは間隙が形成されていなけ
ればならない。これは結果的には気化寒剤の大量
放出時に内容器側仕切部材から外容器側仕切部材
の方向に順次（段階的に）仕切部材が開くように
なるわけであり、一気放出による事故等が防止さ
れるから安全上も非常に有効である。 In addition, since the partition member divides natural convection, it is necessary to form a gap with the inner wall of the pipe to the extent that a plurality of small natural convection flows are formed in the longitudinal direction of the pipe. As a result, when a large amount of vaporized cryogen is released, the partition members open sequentially (in stages) from the partition member on the inner container side to the partition member on the outer container side, which prevents accidents caused by sudden release. This is very effective in terms of safety.
尚、本発明における仕切部材はいわゆる弁とは
異なり管路を密閉する必要はない。すなわち自然
対流の分割機能で足りるから常にガスの連通性が
ある。それ故管路を密閉する必要がない為に仕切
部材の設置（装置組立）が容易であるという副次
的効果もあるし、密閉用に用いる弁動作機構や高
真空化装置（真空ポンプ等）等の付滞設備も不要
である。またガス放出に適した充分な大きさの管
が使用可能である。 Note that unlike a so-called valve, the partition member in the present invention does not need to seal the pipe. In other words, since the dividing function of natural convection is sufficient, there is always gas communication. Therefore, since there is no need to seal the pipeline, it is easy to install partition members (equipment assembly), which is a secondary effect, as well as valve operating mechanisms and high vacuum devices (vacuum pumps, etc.) used for sealing. There is no need for any additional equipment. Also, tubes of sufficient size suitable for gas release can be used.
〔実施例〕
以下本発明の極低温容器の実施例を第１図〜第
５図によつて説明する。[Example] Examples of the cryogenic container of the present invention will be described below with reference to FIGS. 1 to 5.
１は寒剤の液体ヘリウム６を収納する内容器、
２は内容器１を断熱的に包囲する外容器で、その
中間熱輻射を遮蔽するシールド３と高真空および
積層断熱材などからなる断熱空間５を形成する。
内容器１は断熱性の支持体４によつて外容器２に
支持固定される。内容器１内の液体ヘリウム６中
には、極低温において超電導現象を生じる材料に
よつて構成された超電導装置（図示せず）が収納
されている。液体ヘリウム６の上方には気体ヘリ
ウム７があつて、内部で急激な蒸発があつたとき
に気体ヘリウム７を外部に放出する緊急放出管８
が内容器１から外容器２へ水平あるいは水平に近
い状態で図に示すように一定の管径を保つて配管
され、その端部に安全弁９が設けられている。そ
してこの緊急放出管８はその内部の長手方向の複
数個所に自然対流を抑制するための仕切部材１０
が設けられている。この仕切部材１０は、平常時
はガスの大きな自然対流を複数に分割することに
より抑制する。 1 is an inner container that stores liquid helium 6, which is a cryogen;
Reference numeral 2 denotes an outer container that adiabatically surrounds the inner container 1, forming a shield 3 for blocking intermediate heat radiation and a heat insulating space 5 made of high vacuum, laminated heat insulating material, etc.
The inner container 1 is supported and fixed to the outer container 2 by a heat insulating support 4. A superconducting device (not shown) made of a material that exhibits a superconducting phenomenon at extremely low temperatures is housed in the liquid helium 6 in the inner container 1 . Gaseous helium 7 is placed above the liquid helium 6, and there is an emergency release pipe 8 that releases the gaseous helium 7 to the outside when rapid evaporation occurs inside.
is piped from the inner container 1 to the outer container 2 in a horizontal or nearly horizontal state, maintaining a constant pipe diameter as shown in the figure, and a safety valve 9 is provided at the end of the pipe. This emergency discharge pipe 8 has partition members 10 at multiple locations in its internal longitudinal direction for suppressing natural convection.
is provided. This partition member 10 suppresses large natural convection of gas by dividing it into a plurality of parts during normal times.
第６図は仕切り部材１０が無い時、第７図は仕
切部材１０を設けた時の、自然対流の流れの状況
を概念的に示したものである。第６図では室温の
安全弁９付近で暖められたガスの流れ２０が直接
内容器１に流入しており、大きな侵入熱をもたら
していることがわかる。第７図は自然対流ループ
が細分化され、流れ２０の強さも弱くなり、侵入
熱も減ことを示している。内容器１内の寒剤５の
気化ガスが大量に放出される必要のあるときには
流動抵抗にならないようなものであり、具体的に
は第２図〜第５図に示すように構成されている。 FIG. 6 conceptually shows the flow of natural convection when the partition member 10 is not provided, and FIG. 7 conceptually shows the state of the natural convection flow when the partition member 10 is provided. In FIG. 6, it can be seen that the gas flow 20 heated near the safety valve 9 at room temperature directly flows into the inner container 1, causing a large amount of heat to enter. FIG. 7 shows that the natural convection loop is fragmented, the strength of the flow 20 is weakened, and the amount of heat intrusion is also reduced. When a large amount of vaporized gas from the cryogen 5 in the inner container 1 needs to be released, there will be no flow resistance, and the structure is specifically as shown in FIGS. 2 to 5.
第２図および第３図に示す例は、配管８の中心
に支持体１１を設け、この支持体１１に、らせん
形状で少しずつ重なり合うようにした弾力性の薄
板１０ａを取付けたものである。このような仕切
部材１０は、平常時は第２図に示すように位置し
て配管８内の端部９との内容器１内をつなぐ大き
な自然対流による流れを阻止しているが、安全弁
９の動作時は第３図に示すようにガス圧によつて
薄板１０ａが弾性力を抗して変形し、内容器１内
のガスを矢印１２の如く外容器の外へ放出する。
ただし、仕切り部材１は配管８を完全に閉塞する
ものではなく、配管内のガスの連通があつてもよ
い。 In the example shown in FIGS. 2 and 3, a support 11 is provided at the center of the pipe 8, and a thin elastic plate 10a is attached to the support 11 in a spiral shape so as to overlap little by little. Such a partition member 10 is normally positioned as shown in FIG. 2 to block the flow due to large natural convection that connects the end 9 of the pipe 8 and the inside of the inner container 1, but the safety valve 9 During operation, the thin plate 10a is deformed by the gas pressure against the elastic force, as shown in FIG.
However, the partition member 1 does not completely block the pipe 8, and there may be gas communication within the pipe.
また、第３図および第４図に示す例は、配管８
の中心に支持体１１を設け、この支持体１１に、
ばね１０ｂを介して中空部を有する可動板１０a1
とこの可動板１０a1の中空部を覆うような固定板
１０a2とを取付けたものである。このような仕切
部材１０は、平常時は第４図に示すようにばね１
０ｂの力によつて可動板１０a1が固定板１０a2に
圧接されて配管８内の流れを阻止しているが、安
全弁９の動作時は第５図に示すようにガス圧によ
つて可動板１０a1がばね１０ｂの力に抗して変位
し、内容器１内のガスを矢印１２の如く外容器の
外へ放出する。 In addition, in the example shown in FIGS. 3 and 4, the piping 8
A support 11 is provided at the center of the support 11, and
Movable plate 10a 1 having a hollow part via spring 10b
A fixed plate 10a2 is attached to cover the hollow part of the movable plate 10a1 . Such a partition member 10 normally has a spring 1 as shown in FIG.
The movable plate 10a1 is pressed against the fixed plate 10a2 by the force 0b to block the flow in the pipe 8, but when the safety valve 9 is operated, the movable plate 10a1 is moved by the gas pressure as shown in FIG. The plate 10a1 is displaced against the force of the spring 10b, and the gas inside the inner container 1 is discharged to the outside of the outer container as shown by the arrow 12.
ばね作用を付随した仕切り部材は配管８内を完
全に閉塞する必要はないので、これを固定した支
持体１１を管径一定の配管８中に挿入するだけで
容易に組み立てができる。また、配管８の径もガ
ス放出に訂した十分に大きいものを使うことがで
き、安全性も高められる。 Since the partition member with the spring action does not need to completely block the inside of the pipe 8, it can be easily assembled by simply inserting the support member 11 to which it is fixed into the pipe 8 having a constant diameter. Further, the diameter of the pipe 8 can be sufficiently large for gas release, and safety can be improved.
以上述べられたように本発明によれば、緊急ガ
ス放出管としての機能を有する水平配管内におけ
る自然対流を大幅に抑制することができたので、
自然対流による熱損失の少ない効果的な極低温容
器を得ることができる。 As described above, according to the present invention, natural convection within the horizontal pipe that functions as an emergency gas release pipe can be significantly suppressed.
An effective cryogenic container with little heat loss due to natural convection can be obtained.
第１図は本発明の極低温容器の一実施例を示す
略示的断面図、第２図および第３図は夫々本発明
の極低温容器における仕切部材の一例を説明する
断面図、第４図及び第５図は夫々仕切部材の他の
例を説明する断面図、第６図及び第７図は夫々配
管内のガスの自然対流を示す模式図である。
１……内容器、２……外容器、６……液体ヘリ
ウム、７……気体ヘリウム、８……緊急放出管、
１０……仕切部材、１１……支持体、１２……ガ
スの流れ。
FIG. 1 is a schematic sectional view showing an embodiment of the cryogenic container of the present invention, FIGS. 2 and 3 are sectional views illustrating an example of the partition member in the cryogenic container of the present invention, and FIG. 5 and 5 are sectional views each illustrating another example of the partition member, and FIGS. 6 and 7 are schematic diagrams illustrating natural convection of gas in the pipe, respectively. 1...Inner container, 2...Outer container, 6...Liquid helium, 7...Gas helium, 8...Emergency release pipe,
10... Partition member, 11... Support body, 12... Gas flow.
Claims (1)
断熱的に包囲する常温の外容器および前記内容器
から前記外容器へほぼ水平に引出されるガス放出
用の配管とを有する極低容器において、前記配管
中に管長手方向に沿つて支持体を設け、その支持
体の管長手方向の複数位置に、ばね作用を付随し
た仕切部材を配管内壁とは間隙をもつて設けて、
該配管内における自然対流を該仕切部材にて複数
に分割することにより抑制すると共に前記内容器
で気化した寒剤が大量に放出されるときだけ前記
仕切部材がばね力に抗して開くように構成したこ
とを特徴とする極低温容器。 ２ 弾力性を有する薄板をらせん状に切込むと共
に切込み部が重ね合うようにして仕切部材を構成
したことを特徴とする特許請求の範囲第１項記載
の極低温容器。 ３ 支持体にばねを介して取付けられた中空部を
有する可動板と前記可動板の中空部を覆うように
支持体に固定された固定板によつて仕切部材を構
成したことを特徴とする特許請求の範囲第１項記
載の極低温容器。[Scope of Claims] 1. An inner container for storing a cryogenic cryogen, an outer container at room temperature that adiabatically surrounds the inner container, and gas discharge piping that is drawn out almost horizontally from the inner container to the outer container. In the ultra-low container having a structure, a support is provided in the pipe along the longitudinal direction of the pipe, and partition members each having a spring action are attached to the support at multiple positions in the longitudinal direction of the pipe with gaps from the inner wall of the pipe. Provided,
The natural convection within the pipe is suppressed by dividing it into a plurality of parts with the partition member, and the partition member is configured to open against a spring force only when a large amount of vaporized refrigerant is released in the inner container. A cryogenic container characterized by: 2. A cryogenic container according to claim 1, characterized in that the partition member is constructed by cutting a thin elastic plate into a spiral shape, and the cut portions are overlapped. 3. A patent characterized in that the partition member is constituted by a movable plate having a hollow portion attached to a support via a spring and a fixed plate fixed to the support so as to cover the hollow portion of the movable plate. A cryogenic container according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59007178A JPS59139686A (en) | 1984-01-20 | 1984-01-20 | Cryogenic container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59007178A JPS59139686A (en) | 1984-01-20 | 1984-01-20 | Cryogenic container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59139686A JPS59139686A (en) | 1984-08-10 |
| JPH0230193B2 true JPH0230193B2 (en) | 1990-07-04 |
Family
ID=11658817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59007178A Granted JPS59139686A (en) | 1984-01-20 | 1984-01-20 | Cryogenic container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59139686A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108028117B (en) | 2015-09-15 | 2019-10-25 | 三菱电机株式会社 | Superconducting magnet apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5389695A (en) * | 1977-01-18 | 1978-08-07 | Toshiba Corp | Cooling device of superconductive magnet |
-
1984
- 1984-01-20 JP JP59007178A patent/JPS59139686A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5389695A (en) * | 1977-01-18 | 1978-08-07 | Toshiba Corp | Cooling device of superconductive magnet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59139686A (en) | 1984-08-10 |
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