JPS6310911B2 - - Google Patents
Info
- Publication number
- JPS6310911B2 JPS6310911B2 JP55090598A JP9059880A JPS6310911B2 JP S6310911 B2 JPS6310911 B2 JP S6310911B2 JP 55090598 A JP55090598 A JP 55090598A JP 9059880 A JP9059880 A JP 9059880A JP S6310911 B2 JPS6310911 B2 JP S6310911B2
- Authority
- JP
- Japan
- Prior art keywords
- shield plate
- heat
- copper
- container
- radiant heat
- 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
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
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/001—Thermal insulation specially adapted for cryogenic vessels
-
- 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
- F17C2203/032—Multi-sheet layers
-
- 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
- F17C2203/0391—Thermal insulations by vacuum
-
- 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
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0636—Metals
- F17C2203/0646—Aluminium
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Description
【発明の詳細な説明】
本発明は超電導機器を収納する極低温容器に係
り、特に、輻射熱シールド板を改良した極低温容
器に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cryogenic container for storing superconducting equipment, and more particularly to a cryogenic container having an improved radiant heat shield plate.
超電導機器、たとえば超電導コイルに永久電流
を流す現象を得るためには、約４〓の極低温にす
ることが絶対条件となる。 In order to obtain the phenomenon of flowing a persistent current in a superconducting device, such as a superconducting coil, an extremely low temperature of about 4°C is an absolute prerequisite.
この超電導コイルを約４〓に冷却するには液体
ヘリウム中に侵漬するが、液体ヘリウムを極力蒸
発させないようにする必要がある。液体ヘリウム
を極力蒸発させないためには、真空断熱を行な
い、かつ、シールド板に液体窒素77〓を流通させ
ると共に、多層断熱体を具備し、伝達熱と輻射熱
を遮断する必要がある。 In order to cool this superconducting coil to about 4㎓, it is immersed in liquid helium, but it is necessary to prevent the liquid helium from evaporating as much as possible. In order to prevent liquid helium from evaporating as much as possible, it is necessary to perform vacuum insulation, to circulate liquid nitrogen 77〓 through the shield plate, and to provide a multilayer insulation to block transmitted heat and radiant heat.
従来の輻射熱シールド板は、熱伝導性の良い銅
板からなり、銅板には液体窒素を流通させる冷却
管が固着され、その大気側には多層断熱体を設置
してあるのが一般的である。 Conventional radiant heat shield plates are made of a copper plate with good thermal conductivity, and a cooling pipe through which liquid nitrogen flows is fixed to the copper plate, and a multilayer heat insulator is generally installed on the atmosphere side.
しかしながら、上述した従来の輻射シールド
は、低温側（内面）がシールド板の銅の地肌のみ
であり、表面を当初鏡面に磨いてあつても酸化す
ることにより時間の経過と共に褐色に変化し、反
射率が低下するので、この面で他の放射された熱
吸収が大きくなり、この面から放射される熱量も
多く、結局、シールド板の酸化した面から超電導
機器への熱侵入が多くなり、高価な液体ヘリウム
の消費量が多くなり不経済であつた。 However, in the conventional radiation shield described above, the low temperature side (inner surface) is only the bare copper of the shield plate, and even if the surface is initially polished to a mirror finish, it will change to brown over time due to oxidation and reflect As the rate decreases, this surface absorbs other radiated heat, and the amount of heat radiated from this surface is also large.In the end, more heat enters the superconducting equipment from the oxidized surface of the shield plate, resulting in an expensive The amount of liquid helium consumed was large, making it uneconomical.
本発明は上述の点に鑑み成されたもので、その
目的とするところは、銅製シールド板内面の反射
効果を良好にし、その面から放射される熱量を少
なくし、超電導機器への熱侵入が少ないと共に、
熱の偏差による熱収縮差があつてもこれを排除で
きる極低温容器を提供するにある。 The present invention has been made in view of the above points, and its purpose is to improve the reflection effect of the inner surface of a copper shield plate, reduce the amount of heat radiated from that surface, and prevent heat from entering superconducting equipment. With less,
To provide a cryogenic container capable of eliminating thermal shrinkage differences due to thermal deviations.
本発明は大気側（外側）に多層断熱体を備えて
いる銅製の輻射熱シールド板の内側に多数枚に分
割されたアルミニウム製の反射板を互いに間隙を
有して貼付けることにより、所期の目的を達成す
るように成したものである。 The present invention achieves the desired effect by attaching a large number of divided aluminum reflectors with gaps between them on the inside of a copper radiant heat shield plate that is equipped with a multilayer heat insulator on the atmosphere side (outside). It was created to achieve a purpose.
以下、図面の実施例に基づいて本発明を説明す
る。 The present invention will be described below based on embodiments shown in the drawings.
第１図に超電導機器を収納する本発明の一実施
例である極低温容器の構成を示す。 FIG. 1 shows the configuration of a cryogenic container that is an embodiment of the present invention for housing superconducting equipment.
該図でその概略を説明すると、上述もした如
く、超電導コイル等の超電導機器１は極低温約４
〓に保持する必要があり、大気約300〓と熱しや
断することが条件となる。 To explain the outline using this figure, as mentioned above, the superconducting equipment 1 such as the superconducting coil is kept at an extremely low temperature of about 4
The condition is that it must be kept at a temperature of about 300 °C, and must be able to withstand heat from the atmosphere at about 300 °C.
熱しや断の物理的特性は熱伝導、熱伝達、及び
熱輻射であり、超電導機器１は断熱支持（図示せ
ず）で熱伝導を低下せしめ、容器の内部を真空状
態にし熱伝達を極限に軽減し、かつ、熱輻射シー
ルドにより熱輻射をしや断する。 The physical properties of heat insulation are heat conduction, heat transfer, and heat radiation, and the superconducting device 1 uses a heat insulating support (not shown) to reduce heat conduction and create a vacuum inside the container to maximize heat transfer. At the same time, the heat radiation shield suppresses the heat radiation.
このため超電導機器１は真空容器２に収納さ
れ、この真空容器は胴部と底板３、上蓋４、及び
シールド板支えフランジ５より構成する。 For this purpose, the superconducting device 1 is housed in a vacuum container 2, which is composed of a body, a bottom plate 3, an upper lid 4, and a shield plate supporting flange 5.
一方、熱輻射シールドはシールド板６、底部シ
ールド板７、及び上部シールド板８より成り、そ
れぞれの各シールド板６，７，８には液体窒素流
通冷却管９、及び１０が固着されている、更に、
輻射効率を向上させることを目的とし、各シール
ド板６，７，８の大気側にはフイルム状の多層断
熱体１１、及び１２を巻き付けられている。 On the other hand, the thermal radiation shield consists of a shield plate 6, a bottom shield plate 7, and an upper shield plate 8, and liquid nitrogen flow cooling pipes 9 and 10 are fixed to each shield plate 6, 7, and 8, respectively. Furthermore,
For the purpose of improving radiation efficiency, film-like multilayer heat insulators 11 and 12 are wrapped around the atmosphere side of each shield plate 6, 7, 8.
シールド板６と底部シールド板７は冷却管９の
入口１３より出口１５へ、上部シールド板８は冷
却管１０の入口１４より出口１６へ液体窒素を流
通させて冷却される。 The shield plate 6 and the bottom shield plate 7 are cooled by flowing liquid nitrogen from the inlet 13 to the outlet 15 of the cooling pipe 9, and the upper shield plate 8 is cooled by flowing liquid nitrogen from the inlet 14 to the outlet 16 of the cooling pipe 10.
第２図は第１図のＡ部を拡大して示し、上述の
如く、銅製のシールド板６の表面に冷却管９が固
着され、その大気側には多層断熱体１１が巻き回
して取り付けられ、冷却管９には液体窒素１７を
流通している状態が示されている。 FIG. 2 shows an enlarged view of part A in FIG. 1. As mentioned above, the cooling pipe 9 is fixed to the surface of the copper shield plate 6, and the multilayer heat insulator 11 is wound around and attached to the atmosphere side. , a state in which liquid nitrogen 17 is flowing through the cooling pipe 9 is shown.
そして、本実施例では上記シールド板６の低温
側にアルミニウム製の反射板１８を設け、リベツ
ト１９でシールド板６に内貼りしてある。この反
射板１８は多数枚に分割され、互いに間隙を有
し、シールド板６に内貼りされているため、熱の
偏差による熱収縮差が排除されると共に、真空排
気を容易にしてある。尚、反射板１８はシールド
板６の内側全面に貼付てある。 In this embodiment, a reflective plate 18 made of aluminum is provided on the low temperature side of the shield plate 6, and is attached to the inside of the shield plate 6 with rivets 19. This reflecting plate 18 is divided into a large number of pieces, each having a gap between them, and is attached to the inside of the shield plate 6, so that differences in thermal shrinkage due to heat deviation are eliminated and vacuum evacuation is facilitated. Incidentally, the reflection plate 18 is attached to the entire inner surface of the shield plate 6.
このようにすることにより、反射板１８はアル
ミニウム製であるため褐色することはなくなり継
続して反射が可能となり反射効果が良好で、シー
ルド板６内面から放射される熱量が少く、超電導
機器１つの熱侵入も少なく安定化し、しかも液体
ヘリウムの消費も少なく経済的である。 By doing so, since the reflector plate 18 is made of aluminum, it does not turn brown and can reflect continuously, resulting in a good reflection effect.The amount of heat radiated from the inner surface of the shield plate 6 is small, and one superconducting device It is stable with little heat intrusion, and is economical as it consumes little liquid helium.
第３図は従来の銅製シールド板ａの場合と本発
明のアルミニウム製の反射板を取り付けた銅製シ
ールド板ｂの比較で、縦軸に反射板（％）、横軸
に時間（ｔ）をとると本発明(b)の方が反射率が良
好となることがわかる。 Figure 3 shows a comparison between a conventional copper shield plate a and a copper shield plate b equipped with an aluminum reflector according to the present invention, with the reflector (%) on the vertical axis and time (t) on the horizontal axis. It can be seen that the reflectance of the invention (b) is better.
以上説明した本発明の極低温容器によれば、銅
製シールド板の反射効率を良好とすることが可能
となり、銅製シールド板の内面から反射される熱
量が少なく、超電導機器への熱侵入が少ないと共
に、多数枚に分割されている反射板は、互いに間
隙を有して内貼りされているため、熱の偏差によ
る熱収縮差が排除でき、超電導装置の信頼性向上
に一層寄与することになる。 According to the cryogenic container of the present invention as described above, it is possible to improve the reflection efficiency of the copper shield plate, the amount of heat reflected from the inner surface of the copper shield plate is small, and the heat intrusion into superconducting equipment is small. Since the reflective plates, which are divided into many pieces, are attached to each other with gaps between them, differences in thermal contraction due to thermal deviation can be eliminated, which further contributes to improving the reliability of the superconducting device.
第１図は本発明の極低温容器の一実施例を示す
半断面図、第２図は第１図のＡ部拡大詳細図、第
３図は銅製シールド板とアルミ製シールド板との
反射率比較図である。
１……超電導機器、２……真空容器、３……底
板、４……上蓋、６……シールド板、７……底部
シールド板、８……上部シールド板、１１，１２
……多層断熱体、１８……反射板。
Fig. 1 is a half-sectional view showing an embodiment of the cryogenic container of the present invention, Fig. 2 is an enlarged detailed view of part A in Fig. 1, and Fig. 3 is the reflectance of the copper shield plate and the aluminum shield plate. It is a comparison diagram. 1...Superconducting equipment, 2...Vacuum container, 3...Bottom plate, 4...Top lid, 6...Shield plate, 7...Bottom shield plate, 8...Top shield plate, 11, 12
...Multilayer insulation, 18...Reflector.
Claims (1)
外部と熱的に断絶される容器と、該容器内壁と前
記超電導機器間に設置されると共に、外側に液体
窒素を流通させる冷却管が固着されている銅製の
輻射熱シールド板と、該輻射熱シールド板の外側
に設けられた多層断熱体とを備えた極低温容器に
おいて、前記銅製の輻射熱シールド板の内側に、
多数枚に分割されたアルミニウム製の反射板を互
いに間隙を有して貼付けたことを特徴とする極低
温容器。1 A container that houses superconducting equipment that is maintained at an extremely low temperature and is thermally isolated from the outside, and a cooling pipe that is installed between the inner wall of the container and the superconducting equipment and that circulates liquid nitrogen to the outside. In a cryogenic container equipped with a copper radiant heat shield plate and a multilayer insulator provided on the outside of the radiant heat shield plate, on the inside of the copper radiant heat shield plate,
A cryogenic container characterized by having a plurality of divided aluminum reflector plates attached to each other with gaps between them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9059880A JPS5735386A (en) | 1980-07-04 | 1980-07-04 | Supercryogenic vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9059880A JPS5735386A (en) | 1980-07-04 | 1980-07-04 | Supercryogenic vessel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5735386A JPS5735386A (en) | 1982-02-25 |
| JPS6310911B2 true JPS6310911B2 (en) | 1988-03-10 |
Family
ID=14002900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9059880A Granted JPS5735386A (en) | 1980-07-04 | 1980-07-04 | Supercryogenic vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5735386A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5998570A (en) * | 1982-11-26 | 1984-06-06 | Japanese National Railways<Jnr> | Cryogenic heat insulating support |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS535495U (en) * | 1976-07-01 | 1978-01-18 |
-
1980
- 1980-07-04 JP JP9059880A patent/JPS5735386A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5735386A (en) | 1982-02-25 |
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