JPS62126606A - Cryogenic vessel - Google Patents

Cryogenic vessel

Info

Publication number
JPS62126606A
JPS62126606A JP60266156A JP26615685A JPS62126606A JP S62126606 A JPS62126606 A JP S62126606A JP 60266156 A JP60266156 A JP 60266156A JP 26615685 A JP26615685 A JP 26615685A JP S62126606 A JPS62126606 A JP S62126606A
Authority
JP
Japan
Prior art keywords
liquid helium
tank
vessel
cooling pipe
liquid
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
Application number
JP60266156A
Other languages
Japanese (ja)
Other versions
JPH0324046B2 (en
Inventor
Katsuyoshi Toyoda
豊田　勝義
Takashi Murai
隆 村井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP60266156A priority Critical patent/JPS62126606A/en
Priority to DE19863639760 priority patent/DE3639760A1/en
Priority to US06/934,992 priority patent/US4713941A/en
Publication of JPS62126606A publication Critical patent/JPS62126606A/en
Publication of JPH0324046B2 publication Critical patent/JPH0324046B2/ja
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/10—Vessels not under pressure with provision for thermal insulation by liquid-circulating or vapour-circulating jackets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0147—Shape complex
    • F17C2201/0157—Polygonal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0308—Radiation shield
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/016—Noble gases (Ar, Kr, Xe)
    • F17C2221/017—Helium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG

Abstract

PURPOSE:To manufacture a cryogenic vessel subject to less evaporation of liquid helium with the temperature in upper part of liquid helium vessel held at low temperature even if the level of liquid helium is lowered by a method wherein multiple inlets of cooling pipe are formed on the upper part of liquid helium vessel. CONSTITUTION:The inlets 10a, 10b and 10c of cooling pipe 10 are provided on overall surface of radiation shield 8 facing inside of a liquid helium vessel 3. The inlet 10a is formed in the central part of said vessel 3 while the other inlets 10b, 10c are formed in the corners. An outlet 10d of cooling pipe 10 faces outside from an outer vessel 5. In such a constitution, evaporated helium gas flows all over the upper part of said vessel 3 without being concentrated on any upper part so that the temperature in the upper part of said vessel 3 may not be raised to restrain the evaporation of liquid helium 1 from increasing even if the level of liquid helium is lowered.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、極低温容器に関し、特に輻射熱が液体ヘリ
ウム槽内に侵入するのを防止するのに役立つ極低温容器
に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to cryogenic vessels, and more particularly to cryogenic vessels useful for preventing radiant heat from entering a liquid helium bath.

〔従来の技術〕[Conventional technology]

第２図は例えば特開昭５６−１１６５５５号公報に示さ
れた従来の極低温容器を示す断面図であり、液体ヘリウ
ム（１）中に浸漬された超電導コイル（２）が、強度お
よび溶接性の点からステンレス鋼からなる液体ヘリウム
槽（３）内に収納されている。この液体ヘリウム槽（３
）の外側には真空層（４）を介して室温にある外槽（５
）が設けられている。真空層（４）中には断熱材からな
る第１の支持部材（７ａ）と第２の支持部材（７ｂ）と
で支持された輻射熱シールド板（８）が設けられている
。輻射熱シールド板（８）の表面には入口部（９ａ）が
液体ヘリウム槽（３）の上部中央から液体ヘリウム槽（
３）内に臨んでいる冷却管（９）が設けられている。冷
却管（９）の出口部（９ｂ）は外槽（５）から外部に臨
んでいる。FIG. 2 is a sectional view showing a conventional cryogenic container disclosed in, for example, Japanese Patent Application Laid-open No. 56-116555, in which a superconducting coil (2) immersed in liquid helium (1) has high strength and weldability. It is housed in a liquid helium tank (3) made of stainless steel. This liquid helium tank (3
) is connected to the outer tank (5) at room temperature via a vacuum layer (4).
) is provided. A radiant heat shield plate (8) supported by a first support member (7a) and a second support member (7b) made of a heat insulating material is provided in the vacuum layer (4). The surface of the radiant heat shield plate (8) has an inlet (9a) that connects the liquid helium tank (3) from the upper center of the liquid helium tank (3).
3) A cooling pipe (9) is provided which faces the inside. The outlet portion (9b) of the cooling pipe (9) faces the outside from the outer tank (5).

次に、上記構成の動作について説明する。外槽（５）と
液体ヘリウム槽（３）との間には、約３００にの温度差
があり、輻射熱シールド板（８）がなければステファン
・ボルツマンの法則から解るように絶対温度の４乗の差
に比例する大きな輻射熱が、外槽（５）から液体ヘリウ
ム槽（３）に入射し、大量の液体ヘリウム（１）を蒸発
させる。輻射熱シールド板（８）は、外槽（５）から直
接液体ヘリウム槽（３）に入射する輻射熱を防止するも
のであり、この輻射熱シールド板（８）の温度が低いほ
ど液体ヘリウム槽（３）への入射熱は少ない。したがっ
て、輻射熱シールド板（８）の表面には、冷却管（９）
を取り付け、蒸発したヘリウムガスの寒冷を利用して輻
射熱シールド板（８）を冷却するようになっている。Next, the operation of the above configuration will be explained. There is a temperature difference of approximately 300° between the outer tank (5) and the liquid helium tank (3), and if there is no radiant heat shield plate (8), the absolute temperature will be raised to the 4th power as understood from the Stefan-Boltzmann law. A large amount of radiant heat proportional to the difference between the two enters the liquid helium tank (3) from the outer tank (5) and evaporates a large amount of liquid helium (1). The radiant heat shield plate (8) prevents radiant heat from directly entering the liquid helium tank (3) from the outer tank (5), and the lower the temperature of the radiant heat shield plate (8), the more the liquid helium tank (3) There is little heat incident on the Therefore, on the surface of the radiant heat shield plate (8), there are cooling pipes (9).
is installed, and the radiant heat shield plate (8) is cooled using the cold of the evaporated helium gas.

冷却管（９）の入口部（９ａ）は通常１箇所であり、液
体ヘリウム槽（３）の上部の中央部付近にある。The cooling pipe (9) usually has one inlet (9a), located near the center of the upper part of the liquid helium tank (3).

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

従来の極低温容器は以上のように構成されているので、
液体ヘリウム（１）が液体ヘリウム槽（３）内に充分に
満たされている場合には、液体ヘリウム槽（３）の上部
もヘリウムガスにより冷却されており、液体ヘリウム槽
（３）の上部から液体ヘリウム（１）への輻射熱は充分
小さい値であり、液体ヘリウム（１）の蒸発量は少ない
。しがしながら、液体ヘリウム（１）が蒸発し、液面が
下がると、ヘリウムガスの流れは第３図に示すように液
体ヘリウム槽（３）の上部の隅の部分を通過する量が少
なくなり、その隅の部分の冷却効果は悪くなるという問
題点があった。特に、液体ヘリウム槽（３）は、ステン
レス鋼から作られているので熱伝導が悪く、外槽（５）
からの輻射熱で上記隅の部分の温度が上昇し、液体ヘリ
ウム（１）への輻射熱が多くなり、その結果液体ヘリウ
ム（１）の蒸発量がさらに増加するといった問題点があ
った。Conventional cryogenic containers are constructed as described above, so
When the liquid helium tank (3) is sufficiently filled with liquid helium (1), the upper part of the liquid helium tank (3) is also cooled by helium gas, and the liquid helium tank (3) is cooled from the upper part of the liquid helium tank (3). The radiant heat to the liquid helium (1) is a sufficiently small value, and the amount of evaporation of the liquid helium (1) is small. However, as the liquid helium (1) evaporates and the liquid level drops, the amount of helium gas flowing through the upper corner of the liquid helium tank (3) decreases, as shown in Figure 3. Therefore, there was a problem in that the cooling effect in the corner portions deteriorated. In particular, the liquid helium tank (3) is made of stainless steel, so it has poor heat conduction, and the outer tank (5)
There was a problem in that the temperature of the corner portion rose due to the radiant heat from the helium, increasing the amount of radiant heat to the liquid helium (1), and as a result, the amount of evaporation of the liquid helium (1) further increased.

この発明は、かかる問題点を解決するためになされたも
ので、液体ヘリウムの液面が降下しても液体ヘリウム槽
の上部全体を低温のままに保ち、液体ヘリウムの蒸発量
の少ない極低温容器を得ることを目自勺とする。This invention was made to solve this problem, and is a cryogenic container that keeps the entire upper part of the liquid helium tank at a low temperature even when the liquid helium level drops, and that reduces the amount of evaporation of liquid helium. The aim is to obtain.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に係る極低温容器は、液体ヘリウム槽の上部に
冷却管の入口部を複数個形成したものである。The cryogenic container according to the present invention has a plurality of cooling pipe inlets formed in the upper part of a liquid helium tank.

〔作用〕[Effect]

この発明においては、液体ヘリウム槽内の液面が降下し
たときでも、蒸発したヘリウムガスの液体ヘリウム槽（
３）内での流れは液体ヘリウム槽の上部全体にわたる。In this invention, even when the liquid level in the liquid helium tank drops, the liquid helium tank (
3) The flow within is over the entire top of the liquid helium bath.

〔実施例〕〔Example〕

以下、この発明の実施例を図について説明する。 Embodiments of the present invention will be described below with reference to the drawings.

第１図はこの発明の一実施例を示す断面図であり、第２
図、第３図と同一または相当部分は同一符号を付し、そ
の説明は省略する。図において、輻射シールド板（８）
の全表面に設けられた冷却管（１０）の入口部（１０ａ
）、（１０ｂ）、（１０ｃ）は液体ヘリウム槽（３）内
に臨んで設けられている。冷却管（１０）の入口部（１
０ａ）は液体ヘリウム槽（３）の中央部に形成され、他
の入口部（１０ｂ）、（１０ｃ）はその隅部に形成され
ている。冷却管（１０）の出口部（１０ｄ）は外槽（５
）から外部に臨んでいる。FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG.
The same or corresponding parts as in FIG. In the figure, the radiation shield plate (8)
The inlet part (10a) of the cooling pipe (10) provided on the entire surface of
), (10b), and (10c) are provided facing into the liquid helium tank (3). Inlet part (1) of cooling pipe (10)
0a) is formed in the center of the liquid helium tank (3), and the other inlets (10b) and (10c) are formed in the corners. The outlet part (10d) of the cooling pipe (10) is connected to the outer tank (5
) facing the outside.

このように構成された極低温容器においては、液体ヘリ
ウム槽（３）の液体ヘリウム（１）の液面が降下したと
きでも、蒸発したヘリウムガスの液体ヘリウム槽（３）
内での流れは、液体ヘリウム槽（３）の上部の一部に片
寄ることなく上部全体にわたる。その結果、液体ヘリウ
ム（３）の液面が降下しても液体ヘリウム槽（３）の上
部で温度上昇する部分はなく、液体ヘリウム槽（３）内
の液体ヘリウム（１）の蒸発量は抑制される。In the cryogenic container configured in this way, even when the liquid level of the liquid helium (1) in the liquid helium tank (3) drops, the evaporated helium gas remains in the liquid helium tank (3).
The flow within the liquid helium tank (3) covers the entire upper part of the liquid helium tank (3) without being biased to a part of the upper part. As a result, even if the liquid level of liquid helium (3) falls, there is no temperature increase in the upper part of the liquid helium tank (3), and the amount of evaporation of liquid helium (1) in the liquid helium tank (3) is suppressed. be done.

なお、上記実施例では液体ヘリウム槽（３）の上部各隅
部と中央部とに冷却管（１０）の入口部（１０ａ）、（
１０ｂ）、（１０ｃ）を形成した場合について説明した
が、冷却管（１０）の入口部（１０ａ）、（１０ｂ）、
（１０ｃ）の位置は勿論これに限定されるものではなく
、液体ヘリウム槽（３）の形状により冷却管（１０）の
入口部の位置は異なる。要は液体ヘリウム槽（３）の上
部全体にヘリウムガスの流れが生ずるように、冷却管の
入口部を液体ヘリウム槽（３）の上部に複数個形成すれ
ばよい。In the above embodiment, the cooling pipe (10) has an inlet part (10a), (
10b), (10c) are formed, but the inlet portions (10a), (10b) of the cooling pipe (10),
The position of (10c) is of course not limited to this, and the position of the inlet of the cooling pipe (10) differs depending on the shape of the liquid helium tank (3). In short, a plurality of cooling pipe inlets may be formed in the upper part of the liquid helium tank (3) so that helium gas flows over the entire upper part of the liquid helium tank (3).

〔発明の効果〕〔Effect of the invention〕

以上のように、この発明によれば、液体ヘリウム槽の上
部に冷却管の入口部を複数個形成したことにより、液体
ヘリウム槽の上部全体にわたってノ＼リウムガスの流れ
が生ずるので、液体ヘリウム槽の上部全体は常に一様に
冷却される。その結果、液体ヘリウム槽内の液体ヘリウ
ムに侵入する輻射熱は液体ヘリウムの液面降下に関係な
く常に小さく、液体ヘリウムの蒸発量を低く抑えること
ができるという効果がある。As described above, according to the present invention, by forming a plurality of inlets of cooling pipes in the upper part of the liquid helium tank, a flow of gas is generated over the entire upper part of the liquid helium tank. The entire upper part is always uniformly cooled. As a result, the radiant heat that penetrates into the liquid helium in the liquid helium tank is always small regardless of the drop in the liquid helium level, and the effect is that the amount of evaporation of the liquid helium can be kept low.

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

第１図はこの発明の一実施例を示す断面図、第２図は従
来の極低温容器の一例を示す断面図、第３図は第２図の
極低温容器の別の使用態様を示す断面図である。 （１）・・・液体ヘリウム、（２）・・・超電導コイル
、（３）・・・液体ヘリウム槽、（４）・・・真空層、
（５）・・・外槽、（１０）、、、冷却管、（１０ａ）
、（１０）＋）、（１０ｃ）−入口部。 なお、各図中、同一符号は同一または相当部分を示す。 一７＝ １　、　象俸へリウへ ２　　　ｊ！ｔ４コイ！乙 ３　、　商、伴△りりり槽 ４　具７層 ５、外槽 １ｏ　　：　　ｈ神官 １０ａ、Ｄｂ、１０ｃ　：入Ｏ静 尾２図Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a sectional view showing an example of a conventional cryogenic container, and Fig. 3 is a sectional view showing another usage of the cryogenic container shown in Fig. 2. It is a diagram. (1)...Liquid helium, (2)...Superconducting coil, (3)...Liquid helium tank, (4)...Vacuum layer,
(5) Outer tank, (10), Cooling pipe, (10a)
, (10)+), (10c)-inlet section. In each figure, the same reference numerals indicate the same or corresponding parts. 17 = 1, 2 j! t4 carp! Otsu 3, quotient, ban △ Ririri tank 4 tool 7 layer 5, outer tank 1o: h priest 10a, Db, 10c: Iri O Shizuo 2 figure

Claims (2)

【特許請求の範囲】[Claims] （１）液体ヘリウム中に浸漬された超電導コイルを収納
している液体ヘリウム槽と、この液体ヘリウム槽の外側
に真空層を介して設けられている外槽と、前記真空層中
に前記液体ヘリウム槽を囲って設けられ、周面に前記液
体ヘリウムから蒸発したヘリウムガスを導く冷却管が取
り付けられている輻射シールド板とを備えている極低温
容器において、前記冷却管の入口部は、前記液体ヘリウ
ム槽の上部に複数個形成されていることを特徴とする極
低温容器。(1) A liquid helium tank containing a superconducting coil immersed in liquid helium, an outer tank provided outside the liquid helium tank with a vacuum layer in between, and a liquid helium tank in which the liquid helium is placed in the vacuum layer. A cryogenic container is provided with a radiation shield plate that surrounds a tank and has a cooling pipe attached to its circumferential surface that guides helium gas evaporated from the liquid helium. A cryogenic container characterized by a plurality of cryogenic containers formed above a helium tank. （２）冷却管の入口部は液体ヘリウム槽の上部各隅部と
中央部とに形成されている特許請求の範囲第１項記載の
極低温容器。(2) The cryogenic container according to claim 1, wherein the inlet portion of the cooling pipe is formed at each upper corner and the center of the liquid helium tank.
JP60266156A 1985-11-28 1985-11-28 Cryogenic vessel Granted JPS62126606A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP60266156A JPS62126606A (en) 1985-11-28 1985-11-28 Cryogenic vessel
DE19863639760 DE3639760A1 (en) 1985-11-28 1986-11-21 COOLANT CONTAINER
US06/934,992 US4713941A (en) 1985-11-28 1986-11-26 Cryogenic vessel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60266156A JPS62126606A (en) 1985-11-28 1985-11-28 Cryogenic vessel

Publications (2)

Publication Number Publication Date
JPS62126606A true JPS62126606A (en) 1987-06-08
JPH0324046B2 JPH0324046B2 (en) 1991-04-02

Family

ID=17427066

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60266156A Granted JPS62126606A (en) 1985-11-28 1985-11-28 Cryogenic vessel

Country Status (1)

Country Link
JP (1) JPS62126606A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04162405A (en) * 1990-10-24 1992-06-05 Hitachi Ltd Load support structure of superconducting magnet, load supporter and magnetic levitation train

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04162405A (en) * 1990-10-24 1992-06-05 Hitachi Ltd Load support structure of superconducting magnet, load supporter and magnetic levitation train

Also Published As

Publication number Publication date
JPH0324046B2 (en) 1991-04-02

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