JPH0324045B2 - - Google Patents
Info
- Publication number
- JPH0324045B2 JPH0324045B2 JP26615585A JP26615585A JPH0324045B2 JP H0324045 B2 JPH0324045 B2 JP H0324045B2 JP 26615585 A JP26615585 A JP 26615585A JP 26615585 A JP26615585 A JP 26615585A JP H0324045 B2 JPH0324045 B2 JP H0324045B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid helium
- tank
- helium tank
- cooling pipe
- shield plate
- 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
Classifications
-
- 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
- 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
- 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
- F17C2203/01—Reinforcing or suspension means
- F17C2203/011—Reinforcing means
- F17C2203/013—Reinforcing means in the vessel, e.g. columns
-
- 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
-
- 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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0337—Heat exchange with the fluid by cooling
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- 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〕
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.
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９
ａ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９ｂは外槽５から外部に臨ん
でいる。
FIG. 2 is a cross-sectional view showing a conventional cryogenic container shown in, for example, Japanese Patent Application Laid-Open No. 56-116555, in which the superconducting coil 2 immersed in liquid helium 1 is made of stainless steel from the viewpoint of strength and weldability. It is housed in a liquid helium tank 3 made of steel. An outer tank 5 at room temperature is provided outside the liquid helium tank 3 with a vacuum layer 4 interposed therebetween. A radiant heat shield plate 8 is provided in the vacuum layer 4 and supported by a first support member 7a and a second support member 7b made of a heat insulating material. There is an inlet 9 on the surface of the radiant heat shield plate 8.
A cooling pipe 9 whose point a faces into the liquid helium tank 3 from the upper center of the liquid helium tank 3 is provided. An outlet 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300Kの温
度差があり、輻射熱シールド板８がなければステ
フアン・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。したがつて、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
るようになつている。冷却管９の入口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。 Next, the operation of the above configuration will be explained. There is a temperature difference of approximately 300K between the outer tank 5 and the liquid helium tank 3, and if there is no radiant heat shield plate 8, a large amount of radiant heat will be generated that is proportional to the difference in absolute temperature to the fourth power, as understood from the Stefan-Boltzmann law. However, outer tank 5
The liquid helium enters the liquid helium tank 3 from above 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.
The lower the temperature, the less heat is incident on the liquid helium tank 3. Therefore, a cooling pipe 9 is attached to the surface of the radiant heat shield plate 8, and the radiant heat shield plate 8 is cooled using the cold of the evaporated helium gas. There is usually one inlet 9a of the cooling pipe 9, which is located near the center of the upper part of the liquid helium tank 3.
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。しかしながら、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つた。
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つた問題点があ
つた。
Since the conventional cryogenic container is constructed as described above, 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 the helium gas. ,
The radiant heat from the upper part of the liquid helium tank 3 to the liquid helium 1 is a sufficiently small value, and the amount of evaporation of the liquid helium 1 is small. However, liquid helium 1
evaporates and the liquid level falls, the amount of helium gas flowing through the upper corner of the liquid helium tank 3 decreases as shown in Figure 3, and the cooling effect in that corner deteriorates. There was a problem.
In particular, since the liquid helium tank 3 is made of stainless steel, heat conduction is poor, and the temperature of the corner portion increases due to radiant heat from the outer tank 5, increasing the amount of radiant heat to the liquid helium 1. There was a problem that the amount of evaporation of 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
ことを目的とする。 This invention was made to solve this problem, and it keeps the entire upper part of the liquid helium tank at a low temperature even if the liquid level of the liquid helium falls.
The purpose is to obtain a cryogenic container with a small amount of evaporation of liquid helium.
この発明に係る極低温容器は、冷却管を液体ヘ
リウム槽の上部および輻射シールド板の周面に連
設したものである。
The cryogenic container according to the present invention has a cooling pipe connected to the upper part of the liquid helium tank and the circumferential surface of the radiation shield plate.
この発明においては、液体ヘリウム槽内の液体
ヘリウムの蒸発したヘリウムガスが冷却管を通過
することにより、液体ヘリウム槽の上部は一様に
冷却される。
In this invention, the helium gas obtained by evaporating the liquid helium in the liquid helium tank passes through the cooling pipe, so that the upper part of the liquid helium tank is uniformly cooled.
以下、この発明の実施例を図について説明す
る。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図と同一または相対部分は同
一符号を付し、その説明は省略する。図におい
て、冷却管１０は、液体ヘリウム槽３の上部およ
び輻射熱シールド板８の全表面に連設されてい
る。冷却管１０の入口部１０ａは液体ヘリウム槽
３の上部中央から槽内に臨んでおり、その出口部
１０ｂは外槽５から外部に臨んでいる。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and the same or relative parts as in FIGS. 2 and 3 are designated by the same reference numerals, and the explanation thereof will be omitted. In the figure, the cooling pipe 10 is connected to the upper part of the liquid helium tank 3 and the entire surface of the radiant heat shield plate 8. The inlet portion 10a of the cooling pipe 10 faces into the tank from the upper center of the liquid helium tank 3, and the outlet portion 10b faces the outside from the outer tank 5.
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の蒸発したヘ
リウムガスは、冷却管１０の入口部１０ａから入
つて液体ヘリウム槽３の上部を通過し、その後輻
射熱シールド板８の表面を通過して冷却管１０の
出口部１０ｂから外部に放出される。ヘリウムガ
スが液体ヘリウム槽３の上部を通過するとき、そ
の上部全体を冷却するので、液体ヘリウム１の液
面が降下してもヘリウム槽３の上部で温度上昇す
る箇所はなく、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,
The evaporated helium gas from the liquid helium 1 in the liquid helium tank 3 enters from the inlet 10a of the cooling pipe 10, passes through the upper part of the liquid helium tank 3, and then passes through the surface of the radiant heat shield plate 8 to enter the cooling pipe 10. It is discharged to the outside from the outlet portion 10b. When the helium gas passes through the upper part of the liquid helium tank 3, the entire upper part is cooled, so even if the liquid level of the liquid helium 1 falls, there is no temperature rise in the upper part of the helium tank 3, and the liquid helium tank 3 The amount of evaporation of the liquid helium 1 inside is suppressed.
なお、上記実施例では冷却管１０を液体ヘリウ
ム槽３の外側に設けたが、冷却管１０を液体ヘリ
ウム槽３の内側に取り付けても上記実施例と同様
の効果奏する。 In the above embodiment, the cooling pipe 10 is provided outside the liquid helium tank 3, but even if the cooling pipe 10 is installed inside the liquid helium tank 3, the same effect as in the above embodiment can be obtained.
以上のように、この発明によれば、液体ヘリウ
ム槽の上部にも冷却管を設けたことにより、ヘリ
ウムガスが冷却管を通過するときに液体ヘリウム
槽の上部は一様に冷却される。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, since the cooling pipe is also provided in the upper part of the liquid helium tank, the upper part of the liquid helium tank is uniformly cooled when helium gas passes through the cooling pipe. 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.
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……入口部、１０ｂ……
出口部。なお、各図中、同一符号は同一または相
当部分を示す。
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...Inlet section, 10b...
Exit part. In each figure, the same reference numerals indicate the same or corresponding parts.
Claims (1)
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つて
設けられている輻射シールド板と、前記液体ヘリ
ウム槽の上部および前記輻射シールド板の周面に
連設され、前記液体ヘリウムの蒸発したヘリウム
ガスが通過して液体ヘリウム槽の上部および輻射
シールド板を冷却する冷却管とを備えていること
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 the liquid helium tank in the vacuum layer. A radiation shield plate is provided surrounding the liquid helium tank, and the radiation shield plate is connected to the upper part of the liquid helium tank and the circumferential surface of the radiation shield plate, through which the helium gas evaporated from the liquid helium passes through the upper part of the liquid helium tank and the radiation shield. A cryogenic container characterized by comprising a cooling pipe for cooling a plate.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60266155A JPS62126605A (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 |
|---|---|---|---|
| JP60266155A JPS62126605A (en) | 1985-11-28 | 1985-11-28 | Cryogenic vessel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62126605A JPS62126605A (en) | 1987-06-08 |
| JPH0324045B2 true JPH0324045B2 (en) | 1991-04-02 |
Family
ID=17427053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60266155A Granted JPS62126605A (en) | 1985-11-28 | 1985-11-28 | Cryogenic vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62126605A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01113310U (en) * | 1988-01-26 | 1989-07-31 |
-
1985
- 1985-11-28 JP JP60266155A patent/JPS62126605A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62126605A (en) | 1987-06-08 |
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