JPH0511403B2 - - Google Patents
Info
- Publication number
- JPH0511403B2 JPH0511403B2 JP10462586A JP10462586A JPH0511403B2 JP H0511403 B2 JPH0511403 B2 JP H0511403B2 JP 10462586 A JP10462586 A JP 10462586A JP 10462586 A JP10462586 A JP 10462586A JP H0511403 B2 JPH0511403 B2 JP H0511403B2
- Authority
- JP
- Japan
- Prior art keywords
- container
- refrigerant
- helium
- injection port
- superconducting
- 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
- 238000002347 injection Methods 0.000 claims description 28
- 239000007924 injection Substances 0.000 claims description 28
- 239000003507 refrigerant Substances 0.000 claims description 17
- 239000001307 helium Substances 0.000 description 59
- 229910052734 helium Inorganic materials 0.000 description 59
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 59
- 239000007788 liquid Substances 0.000 description 40
- 239000007789 gas Substances 0.000 description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000005481 NMR spectroscopy Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000003325 tomography Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
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
- F17C3/08—Vessels not under pressure with provision for thermal insulation by vacuum spaces, e.g. Dewar flask
- F17C3/085—Cryostats
-
- 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
- F17C2201/0104—Shape cylindrical
-
- 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
- F17C2201/0128—Shape spherical or elliptical
-
- 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
- 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
- F17C2203/068—Special properties of materials for vessel walls
- F17C2203/0687—Special properties of materials for vessel walls superconducting
-
- 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
- F17C2221/014—Nitrogen
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetic Resonance Imaging Apparatus (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〕
本発明は超電導装置に係り、特に医療用核磁気
共鳴−コンピユータ断層撮影装置（以下NMR−
CT装置と記す）に使用するに好適な超電導装置
に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a superconducting device, and particularly to a medical nuclear magnetic resonance computerized tomography device (hereinafter referred to as NMR-computerized tomography device).
This invention relates to a superconducting device suitable for use in a CT device.
NbTi、Nb3Snの金属を極低温状態（4.2K近
辺）にすると電気抵抗が零となる、いわゆる超電
導状態となることが知られている。この現象を利
用すれば強力にして安定な静磁界を、電力を損失
することなく容易に発生することができる。
It is known that when metals such as NbTi and Nb 3 Sn are brought to an extremely low temperature (around 4.2K), their electrical resistance becomes zero, which is the so-called superconducting state. By utilizing this phenomenon, a strong and stable static magnetic field can be easily generated without loss of power.
上記した金属を利用して形成され、強力な磁界
を、安定に、かつ、電力を損失することなく発生
可能な超電導磁石は、核磁気共鳴装置、磁気浮上
列車、荷電粒子集束装置等産業上静磁界発生装置
としての応用分野が広がりつつある。特に、高均
一高安定な静磁界が要求される医療用NMR−
CT装置には、超電導コイルが最適であり、近年
富に脚光を浴びてきている。 Superconducting magnets, which are formed using the above-mentioned metals and can generate strong magnetic fields stably and without power loss, are used in industrial applications such as nuclear magnetic resonance devices, magnetic levitation trains, and charged particle focusing devices. The field of application as a magnetic field generator is expanding. In particular, medical NMR, which requires a highly uniform and highly stable static magnetic field.
Superconducting coils are most suitable for CT devices and have been attracting attention in recent years.
ところで、上記した産業用の超電導コイルにお
いては、発生静磁界空間の利用の容易さより第２
図に示すように、磁石の磁界中心軸方向が水平方
向に設置されている超電導装置（以下、横置型超
電導装置と呼ぶ）が広く使用されている。即ち、
第２図に示すように、超電導磁石は極低温冷媒で
ある液体ヘリウム（4.2K）の冷媒中で初めて安
定に動作させることができるため、ヘリウム容器
１の中に設置され、液体ヘリウムに浸漬されてい
る。この冷却媒体である液体ヘリウムは、常温
（300K）からの熱侵入に対して熱的にしや断され
ている必要があり、通常はヘリウム容器１の周囲
を約20Kのガスヘリウムシールド板２、約80Kの
液体窒素シールド板３にて覆い、更にそれらを断
熱真空容器４に収納され、真空断熱にて熱侵入量
をおさえ、高価な液体ヘリウムの蒸発量を極力お
さえる構造となつている（このような極低温状態
を維持するものとしては、特公昭54−43359号公
報等で提案されている）。尚、５は磁界利用空間
である。 By the way, in the above-mentioned industrial superconducting coil, the second
As shown in the figure, a superconducting device in which the center axis of the magnetic field of a magnet is installed in a horizontal direction (hereinafter referred to as a horizontal superconducting device) is widely used. That is,
As shown in Figure 2, since superconducting magnets can only be operated stably in liquid helium (4.2K), which is a cryogenic coolant, they are installed in a helium container 1 and immersed in liquid helium. ing. Liquid helium, which is this cooling medium, needs to be thermally insulated from heat intrusion from room temperature (300K), and normally the helium container 1 is surrounded by a gas helium shield plate 2 at about 20K. It is covered with an 80K liquid nitrogen shield plate 3, and is further housed in an insulated vacuum container 4, which is vacuum insulated to suppress the amount of heat intrusion and minimize the amount of evaporation of expensive liquid helium (such as this). A device that maintains a cryogenic state has been proposed in Japanese Patent Publication No. 54-43359, etc.). Note that 5 is a magnetic field utilization space.
一方、超電導コイルを動作させるためには、ま
ず、液体ヘリウム温度まで超電導コイルを冷却
し、電流を超電導コイルに通電して励磁する必要
がある。また、ヘリウム容器１内の液体ヘリウム
は蒸発するため液体ヘリウム量が減少する恐れが
あり、液体ヘリウムを供給する必要があると共
に、蒸発したガスヘリウムを放出してやらねばな
らない。これを行うために、通常、超電導装置に
は冷媒である液体ヘリウムの注入管、蒸発したガ
スヘリウムの放出管、電流通電用のパワーリード
１０等を備えている。そして、これら液体ヘリウ
ムの注入管、ガスヘリウムの放出管、及びパワー
リード１０等は、超電導装置に設けられている液
体ヘリウム注入用ポート６を介して導出されてい
る。また、液体ヘリウム注入用ポート６の内筒７
は、液体ヘリウム注入用ポート６の常温部（約
300K）と4.2Kのヘリウム容器部１を結合するも
のであり、ヘリウム容器部１への熱侵入量を極力
へらすため、熱電導長を充分に長くするととも
に、20Kのガスヘリウムシールド板２からのサー
マルアンカ８、及び約80Kの液体窒素シールド板
３からのサーマルアンカ９を設けている。 On the other hand, in order to operate a superconducting coil, it is first necessary to cool the superconducting coil to the temperature of liquid helium, and to excite the superconducting coil by passing a current through the superconducting coil. Further, since the liquid helium in the helium container 1 evaporates, there is a risk that the amount of liquid helium will decrease, and it is necessary to supply liquid helium and also to discharge the evaporated gas helium. In order to do this, a superconducting device is usually equipped with an injection tube for liquid helium as a refrigerant, a discharge tube for evaporated gas helium, a power lead 10 for supplying current, and the like. These liquid helium injection tubes, gas helium discharge tubes, power leads 10, and the like are led out through liquid helium injection ports 6 provided in the superconducting device. In addition, the inner cylinder 7 of the liquid helium injection port 6
is the normal temperature part of liquid helium injection port 6 (approximately
300K) and 4.2K helium container part 1. In order to minimize the amount of heat intrusion into the helium container part 1, the thermoelectric conduction length is sufficiently long, and the heat conduction length from the 20K gas helium shield plate 2 is A thermal anchor 8 and a thermal anchor 9 from a liquid nitrogen shield plate 3 of approximately 80K are provided.
ところで、上述した従来技術は、病院等の狭い
部屋でも収納可能であると共に、極低温冷媒の注
入作業等も容易に行える超電導装置とするため
に、超電導コイルの磁界中心軸が水平方向となる
ように設置すると共に、これを極低温冷媒中に浸
漬して収納するほぼ円筒状のヘリウム容器１と連
通し、少くともこれに極低温冷媒を注入するため
の液体ヘリウム注入用ポート６を装置の周方向に
傾斜させている。この時、液体ヘリウム注入用ポ
ート６のサーマルアンカ８、及び９は、通常の垂
直ポートと同様液体ヘリウム注入用ポート内筒７
に対し垂直に設置されている。これは、常温部か
ら80Kサーマルアンカ９、80Kサーマルアンカ９
から20Kサーマルアンカ８、20Kサーマルアンカ
８から4.2K部までの伝熱距離を最長にするため
である。 By the way, in the above-mentioned conventional technology, in order to create a superconducting device that can be stored even in a narrow room such as a hospital and can easily perform operations such as injection of cryogenic refrigerant, the central axis of the magnetic field of the superconducting coil is set in the horizontal direction. At the same time, it communicates with a substantially cylindrical helium container 1 that is immersed in and stored in a cryogenic refrigerant, and at least a liquid helium injection port 6 for injecting the cryogenic refrigerant into this container is provided around the device. It is tilted in the direction. At this time, the thermal anchors 8 and 9 of the liquid helium injection port 6 are connected to the liquid helium injection port inner cylinder 7 as in a normal vertical port.
It is installed perpendicular to the This is from room temperature to 80K thermal anchor 9, 80K thermal anchor 9
This is to maximize the heat transfer distance from the 20K thermal anchor 8 to the 4.2K part.
しかし、液体ヘリウム注入用ポート内筒７は、
ガスヘリウムで満たされており、ガスヘリウムは
物性的に温度の低いものが重力鉛直下方にたま
り、温度の高いものが上方にたまることが明らか
になつた。そのため、液体ヘリウム注入用ポート
内筒７の温度分布は、内筒７に対し直角方向に等
温度線を持つものではなく、ガスヘリウムとの熱
交換により、重力鉛直方向に対し直角方向（水平
方向）に等温度線を持つものとなることがわつ
た。その場合、従来の液体ヘリウム注入用ポート
内筒７に対し直角方向にサーマルアンカをとつた
ものは、重力鉛方向に下方にある部分より、ガス
ヘリウムの対流と熱交換で直線4.2K部分へ熱が
侵入し、大きな熱侵入量となるという問題点があ
る。
However, the liquid helium injection port inner cylinder 7 is
It is filled with gas helium, and it has been revealed that the physical properties of gas helium with lower temperatures accumulate in the vertical direction of gravity, and higher temperatures accumulate in the upper part. Therefore, the temperature distribution of the liquid helium injection port inner cylinder 7 does not have isothermal lines perpendicular to the inner cylinder 7, but due to heat exchange with the gas helium, the temperature distribution in the liquid helium injection port inner cylinder 7 is perpendicular to the vertical direction of gravity (horizontal direction ) was found to have isothermal lines. In that case, in a conventional liquid helium injection port with a thermal anchor perpendicular to the inner cylinder 7, heat is transferred from the lower part in the vertical direction of gravity to the straight 4.2K part by gas helium convection and heat exchange. There is a problem in that a large amount of heat enters.
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、冷媒注入用ポートを装置の
周方向に傾斜させたものであつても、熱侵入量を
低減し、液体ヘリウム、蒸発量の少ない経済的な
超電導装置を提供することにある。 The present invention has been made in view of the above points, and its purpose is to reduce the amount of heat intrusion even if the refrigerant injection port is inclined in the circumferential direction of the device, The object of the present invention is to provide an economical superconducting device with low evaporation.
本発明は容器の中心軸より垂直真上における位
置に対して所定角度を有する様に容器の周方向に
設置されている冷媒注入用ポートの常温部からの
熱侵入を低減するために設けられたサーマルアン
カを、容器の水平軸とほぼ平行に設けることによ
り所期の目的を達成するようになしたものであ
る。
The present invention is provided in order to reduce heat intrusion from the normal temperature part of a refrigerant injection port that is installed in the circumferential direction of the container so as to have a predetermined angle with respect to a position vertically above the center axis of the container. The desired purpose is achieved by providing the thermal anchor approximately parallel to the horizontal axis of the container.
上記構成とすることにより、サーマルアンカに
は温度差が生じることがないので、冷媒注入用ポ
ート内筒内のガスヘリウムの対流と熱交換があつ
ても、ヘリウム容器部分へ直接熱侵入がなく、液
体ヘリウムの蒸発量を少なくすることができる。
With the above configuration, no temperature difference occurs in the thermal anchor, so even if there is convection and heat exchange of gas helium in the inner cylinder of the refrigerant injection port, there is no direct heat intrusion into the helium container. The amount of evaporation of liquid helium can be reduced.
以下、図面の実施例に基づいて本発明を詳細に
説明する。
Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.
第１図に本発明の一実施例を示す。該図の如
く、本実施例の超電導装置も超電導コイルを液体
ヘリウム１２中に浸漬して収納するヘリウム容器
１と、該ヘリウム容器１の周囲を覆う液体ヘリウ
ム１２への常温からの熱侵入をしや断するガスヘ
リウムシールド板２、及び液体窒素シールド板３
と、これらを収納する断熱真空容器４とから概略
構成され、そして、本実施例では液体ヘリウム注
入用ポート６を周方向に傾斜（超電導装置の垂直
方向に対してほぼ45°傾斜）させて設置している
と共に、液体ヘリウム注入用ポート内筒７のガス
ヘリウム20Kシールドからのサーマルアンカ８、
液体窒素約80Kシールドからのサーマルアンカ９
を、重力鉛直方向に対してほぼ垂直（水平）方向
に設置している。 FIG. 1 shows an embodiment of the present invention. As shown in the figure, the superconducting device of this embodiment also allows heat to enter the helium container 1 in which the superconducting coil is immersed in liquid helium 12 and the liquid helium 12 surrounding the helium container 1 from room temperature. Gas helium shield plate 2 and liquid nitrogen shield plate 3
In this embodiment, the liquid helium injection port 6 is installed so as to be inclined in the circumferential direction (approximately 45° inclined with respect to the vertical direction of the superconducting device). At the same time, a thermal anchor 8 from the gas helium 20K shield of the liquid helium injection port inner cylinder 7,
Thermal anchor 9 from liquid nitrogen approximately 80K shield
is installed in a direction almost perpendicular (horizontal) to the vertical direction of gravity.
このように構成することにより、液体ヘリウム
注入用ポート内筒７内のガスヘリウムの対流と熱
交換により直接侵入する熱を防ぎ、液体ヘリウム
蒸発量の少ない経済的な、超電導装置とすること
ができる。尚、その際のサーマルアンカ８，９の
角度は、水平方向に対して±20°の範囲であれば、
同様な効果が得られる。 With this configuration, direct intrusion of heat can be prevented by convection and heat exchange of gas helium in the liquid helium injection port inner tube 7, and an economical superconducting device with a small amount of liquid helium evaporation can be achieved. . In addition, if the angle of the thermal anchors 8 and 9 at that time is within ±20° with respect to the horizontal direction,
A similar effect can be obtained.
また、NMR−CT装置で、永久電流モードで
運転するものは、所定の電流を電流リード１０に
て流したあと、電流リード１０を液体ヘリウム注
入用ポート６より取りはずすことができる。電流
リード１０を取りはずしたあとは、液体ヘリウム
注入用ポート６内の空間があくため、内部の対流
を防止するための輻射シールド板を通常挿入する
が、液体ヘリウム注入用ポート６の上に閉止フラ
ンジを付け、輻射シールド板１３をほぼ水平方向
に設置するとより効果的である。 Further, in an NMR-CT apparatus that operates in persistent current mode, after a predetermined current is passed through the current lead 10, the current lead 10 can be removed from the liquid helium injection port 6. After removing the current lead 10, there will be a space inside the liquid helium injection port 6, so a radiation shield plate is usually inserted to prevent internal convection, but a closing flange is placed above the liquid helium injection port 6. It is more effective to install the radiation shield plate 13 in a substantially horizontal direction.
以上説明した本発明の超電導装置によれば、容
器の中心軸より垂直真上における位置に対して所
定角度を有する様に容器の周方向に設置されてい
る冷媒注入用ポートの常温部からの熱侵入を低減
するために設けられたサーマルアンカを、容器の
水平軸とほぼ平行に設けたものであるから、設置
空間の十分とれない病院等の狭い部屋であつても
収納可能であることは勿論、液体ヘリウム蒸発量
の少なく経済的なので、比種超電導装置に使用す
る場合には非常に有効である。
According to the superconducting device of the present invention described above, heat from the normal temperature portion of the refrigerant injection port that is installed in the circumferential direction of the container at a predetermined angle with respect to the position vertically above the center axis of the container. Since the thermal anchor installed to reduce intrusion is placed almost parallel to the horizontal axis of the container, it can of course be stored even in small rooms such as hospitals where there is not enough installation space. Since the amount of liquid helium evaporated is small and it is economical, it is very effective when used in a specific superconducting device.
第１図は本発明の超電導装置の一実施例を示す
断面図、第２図は従来の超電導装置を示す断面図
である。
１……ヘリウム容器、２……ガスヘリウムシー
ルド板、３……液体窒素シールド板、４……断熱
真空容器、５……磁界利用空間、６……液体ヘリ
ウム注入用ポート、７……液体ヘリウム注入用ポ
ート内筒、８……20Kガスヘリウムシールド板か
らのサーマルアンカ、９……80K液体窒素シール
ド板からのサーマルアンカ、１０……電流リー
ド、１１……閉止フランジ、１２……液体ヘリウ
ム。
FIG. 1 is a sectional view showing an embodiment of the superconducting device of the present invention, and FIG. 2 is a sectional view showing a conventional superconducting device. 1...Helium container, 2...Gas helium shield plate, 3...Liquid nitrogen shield plate, 4...Insulated vacuum container, 5...Magnetic field utilization space, 6...Liquid helium injection port, 7...Liquid helium Injection port inner cylinder, 8... Thermal anchor from the 20K gas helium shield plate, 9... Thermal anchor from the 80K liquid nitrogen shield plate, 10... Current lead, 11... Closing flange, 12... Liquid helium.
Claims (1)
となるように設置すると共に、これを極低温冷媒
中に浸漬して収納するほぼ円筒状の冷媒容器と、
該冷媒容器の周囲を覆い外部と熱的にしや断する
断熱シールド板と、これらを収納する断熱真空容
器と、前記冷媒容器と連通し、少くともこれに極
低温冷媒を注入するための冷媒注入用ポートと、
該冷媒注入用ポートの常温部からの熱侵入を低減
するために設けられたサーマルアンカとを備え、
前記冷媒注入用ポートが、前記容器の中心軸より
垂直真上における位置に対して所定角度を有する
様に容器の周方向に設置されている超電導装置に
おいて、前記サーマルアンカを容器の水平軸とほ
ぼ平行に設けたことを特徴とする超電導装置。 ２ 前記サーマルアンカは、前記水平軸に対して
±20度の傾斜角範囲内に設置されていることを特
徴とする特許請求の範囲第１項記載の超電導装
置。[Scope of Claims] 1. A substantially cylindrical refrigerant container in which a superconducting coil is installed so that its magnetic field center axis is horizontal, and is immersed in a cryogenic refrigerant.
an insulating shield plate that covers the periphery of the refrigerant container and thermally insulates it from the outside; an insulating vacuum container that houses these; and a refrigerant injection device that communicates with the refrigerant container and injects at least a cryogenic refrigerant into the refrigerant container. port for
and a thermal anchor provided to reduce heat intrusion from the normal temperature part of the refrigerant injection port,
In a superconducting device in which the refrigerant injection port is installed in the circumferential direction of the container so as to have a predetermined angle with respect to a position vertically directly above the central axis of the container, the thermal anchor is placed approximately in line with the horizontal axis of the container. A superconducting device characterized by being installed in parallel. 2. The superconducting device according to claim 1, wherein the thermal anchor is installed within an inclination angle range of ±20 degrees with respect to the horizontal axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61104625A JPS62262408A (en) | 1986-05-09 | 1986-05-09 | Superconducting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61104625A JPS62262408A (en) | 1986-05-09 | 1986-05-09 | Superconducting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62262408A JPS62262408A (en) | 1987-11-14 |
| JPH0511403B2 true JPH0511403B2 (en) | 1993-02-15 |
Family
ID=14385623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61104625A Granted JPS62262408A (en) | 1986-05-09 | 1986-05-09 | Superconducting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62262408A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0541103U (en) * | 1991-11-06 | 1993-06-01 | 株式会社小松製作所 | PTC thermistor device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110254938A (en) * | 2019-06-28 | 2019-09-20 | 查特低温设备(成都)有限公司 | a cryogenic container |
-
1986
- 1986-05-09 JP JP61104625A patent/JPS62262408A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0541103U (en) * | 1991-11-06 | 1993-06-01 | 株式会社小松製作所 | PTC thermistor device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62262408A (en) | 1987-11-14 |
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