JPH0281486A - Cryostat equipped with refrigerator - Google Patents
Cryostat equipped with refrigeratorInfo
- Publication number
- JPH0281486A JPH0281486A JP63230009A JP23000988A JPH0281486A JP H0281486 A JPH0281486 A JP H0281486A JP 63230009 A JP63230009 A JP 63230009A JP 23000988 A JP23000988 A JP 23000988A JP H0281486 A JPH0281486 A JP H0281486A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerator
- cryostat
- expander
- tank
- noise
- 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
Links
- 238000009413 insulation Methods 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 238000005481 NMR spectroscopy Methods 0.000 claims description 2
- 239000001307 helium Substances 0.000 abstract description 10
- 229910052734 helium Inorganic materials 0.000 abstract description 10
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 9
- 230000000644 propagated effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- SWQJXJOGLNCZEY-BJUDXGSMSA-N helium-3 atom Chemical compound [3He] SWQJXJOGLNCZEY-BJUDXGSMSA-N 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、振動を伴う冷凍機を搭載したクライオスタッ
トに係り、特に騒音の低減及び冷凍機接枝部の信頼性の
向上を可能にした冷凍機付きクライオスタットに関する
。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cryostat equipped with a vibrating refrigerator, and in particular to a cryostat that is equipped with a vibrating refrigerator, and in particular, a cryostat that makes it possible to reduce noise and improve the reliability of the refrigerator joint. Regarding cryostat with machine.
従来の冷凍機付きクライオスタット、特に、特開昭６３
−５１８４９号公報に記載されている医療分野で使用す
る人体診断用の核磁気共鳴装！ｄ（以下、単にＭＲＩ装
置と称す）には、均一な高磁界を得るため超電導マグネ
ット（以下単にマグネットと称す）を使用する。このた
め、該マグネットを冷却収納する真空断熱したクライオ
スタンドが必要である。マグネットは超電導状態を保つ
ため、極低温の冷媒、例えば液体ヘリウムに浸漬して冷
却する。肢体ヘリウムはクライオスタットの常温の真空
容器からクライオスタット内に浸入する熱で徐々に蒸発
するため、定期的に液体ヘリウムを注入補充する必要が
ある。この液体ヘリウムの蒸発量を低減すれば、液体ヘ
リウムの消費鑞は低減し、運転コストは大幅に低減する
。このため、クライオスタットに冷凍機等を取り付け、
真空容器から侵入する熱を冷凍機の寒冷で吸収し、液体
へりラムの蒸発量を低減する手段が取られる。この冷凍
機は一般に往復動式の膨張機タイプなので、運転中にピ
ストンの駆動音や衝突音が生じ、これが、クライオスタ
ットの真空容器に伝搬してかなりの！！１Ｍ音が発明す
る。Conventional cryostat with refrigerator, especially JP-A-63
- Nuclear magnetic resonance system for human body diagnosis used in the medical field described in Publication No. 51849! d (hereinafter simply referred to as an MRI apparatus) uses a superconducting magnet (hereinafter simply referred to as a magnet) in order to obtain a uniform high magnetic field. Therefore, a vacuum-insulated cryostand is required to cool and house the magnet. To maintain the superconducting state, magnets are cooled by immersing them in a cryogenic coolant, such as liquid helium. The helium in the limbs gradually evaporates due to the heat that enters the cryostat from the room-temperature vacuum chamber of the cryostat, so it is necessary to periodically replenish it with liquid helium. If the amount of evaporation of this liquid helium is reduced, the consumption of liquid helium will be reduced, and the operating cost will be significantly reduced. For this reason, a refrigerator, etc. is attached to the cryostat,
Measures are taken to reduce the amount of evaporation of the liquid helium by absorbing the heat entering from the vacuum container with the cold of the refrigerator. Since this refrigerator is generally a reciprocating expander type, the piston drive noise and collision noise are generated during operation, which propagates into the vacuum vessel of the cryostat and causes considerable noise! ! Invented by 1M sound.
このため、低騒音北東として冷凍機の先端をクライオス
タンド内の熱シールド槽又は熱シールド筒に固定し、気
密性を有したベローズを介して冷凍機の頭部を真空容器
に一体化すると共に、該駆動音源の冷凍機頭部を遮音カ
バーで囲み、この遮音カバーを真空容器に固定する構造
となっていた。For this purpose, the tip of the refrigerator is fixed to the heat shield tank or heat shield cylinder in the cryostand, and the head of the refrigerator is integrated into the vacuum container via an airtight bellows to ensure low noise. The head of the refrigerator, which is the drive sound source, is surrounded by a sound insulating cover, and this sound insulating cover is fixed to the vacuum container.
上記従来技術の構造では、冷凍機の自重及び真空圧力荷
重を開な伝熱体を介して熱シールド槽又は熱シールド筒
で支持するため、槽又は筒自身の板厚を厚くして剛性を
大きくし、かつ、槽又は筒の支持体の剛性も太き（する
必要がある。しかし、該支持体α一端は真空容器壁に固
定されているため、これらの剛性を大きくすれば、冷凍
機の振動が真空容器まで伝搬しまう点について配慮がさ
れておらず、騒音を低減できない問題やクライオスタッ
トの重量が重くなる問題があった。いっぽう、冷凍機と
熱シールド槽又は熱シールド筒の該伝熱体が経年変化で
弾性支持的な挙動を示す状態になった場合ベローズで該
荷重の一部を支持する様になり、ベローズを介して真空
容器に振動が伝搬して騒動が発生する問題や、伝熱体や
ベロ一ズに振動による繰返し変位が作用して疲労破壊が
発生しクライオスタンドの信頼性が低下する等の問題が
あった。また、冷凍機頭部の遮音に関しては、冷凍機に
接続した給排気用のカス配管を通じて伝搬するガス流動
音を防止する点にっていも配慮されておらず、低騒音化
できない問題があった。In the structure of the above-mentioned conventional technology, since the dead weight and vacuum pressure load of the refrigerator are supported by the heat shield tank or heat shield tube through an open heat transfer body, the thickness of the tank or tube itself is increased to increase the rigidity. In addition, the rigidity of the support for the tank or tube must also be increased.However, since one end of the support α is fixed to the wall of the vacuum vessel, increasing the rigidity of these supports will increase the rigidity of the refrigerator. No consideration was given to the fact that vibrations would propagate to the vacuum vessel, resulting in problems such as not being able to reduce noise and increasing the weight of the cryostat. If the material exhibits elastic supporting behavior due to aging, the bellows will support part of the load, causing problems such as vibrations propagating to the vacuum vessel via the bellows and causing disturbances. There were problems such as repeated displacement due to vibration acting on the heating element and bellows, causing fatigue failure and reducing the reliability of the cryostand.In addition, regarding sound insulation at the head of the refrigerator, There was also no consideration given to the prevention of gas flow noise propagating through the gas supply/exhaust pipes, and there was a problem in that the noise could not be reduced.
本発明の目的は、冷凍機の防振構造を施すことにより、
低騒音の、かつ、高信頼性で軽壊の冷凍機付きクライオ
スタットを提供することを目的とする。The purpose of the present invention is to provide a vibration-proof structure for a refrigerator.
The purpose of the present invention is to provide a low-noise, highly reliable, and light-damaged cryostat with a refrigerator.
本発明は上記目的を達成するために冷凍機の頭部を質量
の大きい磁気シールド体の密気締結とすると共に、例え
ば、ベローズを介して真空容器と接続し、冷凍機先端部
を弾性を有した伝熱体を介して熱シールド槽又は熱シー
ルド筒と一体化したものである。In order to achieve the above object, the present invention makes the head of the refrigerator hermetically connected with a large-mass magnetic shield, connects it to a vacuum container via a bellows, and makes the front end of the refrigerator have elasticity. It is integrated with a heat shield tank or heat shield cylinder through a heat transfer body.
また１頭部からの騒音の漏れを防止するためには、頭部
に接続した配管にも遮音カバーを設け、該遮音カバーを
磁気シールド体に固定したものである。In order to prevent noise from leaking from one head, a sound insulation cover is also provided on the pipe connected to the head, and the sound insulation cover is fixed to the magnetic shield.
すなわち本発明の冷凍機付きクライオスタンドは、被冷
却体及び被冷却体を冷却する冷凍機の低温端を断熱槽に
納めたものであって、断熱槽以外の構成部材の一部に前
記冷凍機を剛結合手段で一体化したことを特徴とする。That is, the cryostand with a refrigerator of the present invention has an object to be cooled and a low-temperature end of a refrigerator for cooling the object to be cooled housed in a heat insulating tank, and the refrigerator is included in some of the components other than the heat insulating tank. It is characterized by being integrated by rigid coupling means.
尚、冷凍機と断熱槽外壁とは弾性支持手段で結合するこ
とが好ましく、断熱槽より外側に出ている冷凍機部分を
囲う遮音手段を設けて、この遮音手段を前記の構成部材
が真空容器に結合させることが好ましい。この場合、冷
凍機に接続した配管をも遮音手段で囲うことや、冷凍機
と断熱槽外壁とを膜装着可能な剛結合手段で一時的に一
体化することが望ましい。It is preferable that the refrigerator and the outer wall of the insulation tank are connected to each other by an elastic support means, and a sound insulation means is provided to surround the part of the refrigerator that is exposed outside the insulation tank, and this sound insulation means is connected to the vacuum container when the above-mentioned components are connected to each other. It is preferable to bind it to. In this case, it is desirable to also surround the piping connected to the refrigerator with a sound insulating means, or to temporarily integrate the refrigerator and the outer wall of the heat-insulating tank with a rigid coupling means that can be attached to a membrane.
自重数トンで固有振動数が非常に小さい磁気シールド体
に、密着固定した冷凍機が発生する振動は、磁気シール
ド体に吸収され、ベローズ等で接続した真空容器にはほ
とんど伝搬しない。それによって、真空容器に共鳴する
騒音を低減できる。The vibrations generated by a refrigerator that is tightly fixed to a magnetic shielding body, which weighs several tons and has a very small natural frequency, are absorbed by the magnetic shielding body and hardly propagate to the vacuum container connected with bellows or the like. Thereby, the noise that resonates in the vacuum container can be reduced.
また、接続ガス配管を含めて冷凍機の頭部を遮音カバー
で囲み、遮音カバーを磁気シールド体に固定できるので
、冷凍機頭部のガス流動音による騒音を低減できる。い
っぽう、冷凍機の自重及び真空圧力荷重は、十分に剛な
磁気シールド体で支持できるので、冷凍機の静的かつ動
的変化はほとんど生じない。これにより、クライオスタ
ットに振動部がなく信頼性が向上すると共に、熱シール
ド槽及び熱シールド筒の板厚を十分小さくしてクライオ
スタットを軽量化することができる。Further, since the head of the refrigerator including the connecting gas piping can be surrounded by a sound insulating cover and the sound insulating cover can be fixed to the magnetic shield, noise caused by gas flow noise at the head of the refrigerator can be reduced. On the other hand, since the refrigerator's own weight and vacuum pressure load can be supported by a sufficiently rigid magnetic shield, static and dynamic changes in the refrigerator hardly occur. As a result, the cryostat does not have a vibrating part, improving reliability, and the thickness of the heat shield tank and the heat shield tube can be made sufficiently small to reduce the weight of the cryostat.
以下、本発明の一実施例を第１図により説明する。被検
者が入る大気に導通した空洞部１を中心部に有するクラ
イオスタットは、その内部に被冷却体の起電導マグネッ
ト２を貯蔵する液体ヘリウム３．この液体ヘリウム２を
貯蔵する液体ヘリウム槽４、複数温度レベル（実施例で
は約７０にと約１５にの２温度レベル）の他の被冷却体
である熱シールド筒５，６を内蔵し、真空容器７で大気
と隔離され内部を断熱処理例えば、積層断熱材８を巻き
付は真空断熱している。冷凍機、例えば、ツルペイ式の
冷凍装置は、ガス加圧源の圧縮機ユニット９と冷凍機で
あるピストン往復動式の膨張機１０、及び、両者をを連
通ずる高圧配管１１と低圧配管１２とから成る。膨張機
の低温部は、クライオスタット内に挿入され、温度約７
０Ｋに冷却した第１ステージ１３と温度約１５Ｋに冷却
した第２ステージ１４を、銅網等の弾性伝熱体１５゜１
６を介して熱シールド筒５，６に一体化している。An embodiment of the present invention will be described below with reference to FIG. A cryostat has a cavity 1 in its center that is connected to the atmosphere into which the subject enters, and is made up of liquid helium 3. A liquid helium tank 4 for storing this liquid helium 2, heat shield cylinders 5 and 6 which are other objects to be cooled at multiple temperature levels (in the example, two temperature levels of about 70 and about 15) are built in, and a vacuum The container 7 is isolated from the atmosphere, and the inside is insulated, for example, by wrapping a laminated heat insulating material 8 around it and insulating it in vacuum. A refrigerating machine, for example, a Tsurupay type refrigerating device, includes a compressor unit 9 as a gas pressurization source, a reciprocating piston expander 10 as a refrigerating machine, and a high-pressure pipe 11 and a low-pressure pipe 12 that communicate the two. Consists of. The low temperature part of the expander is inserted into the cryostat and has a temperature of about 7
The first stage 13 cooled to 0K and the second stage 14 cooled to about 15K are placed in an elastic heat transfer body 15°1 such as a copper net.
It is integrated into the heat shield tubes 5 and 6 via the tube 6.
クライオスタット外側に、断熱槽以外の構成部材である
磁性体１例えば、鉄製の磁気シールド体１７を設置し漏
えい磁界を小空間内に留めている。A magnetic material 1, for example, a magnetic shield 17 made of iron, which is a component other than the heat insulating tank, is installed outside the cryostat to keep the leaked magnetic field within a small space.
この磁気シールド体の板厚は５０ｍｍ以上であり。The plate thickness of this magnetic shield body is 50 mm or more.
重量は数トンに達する。膨張機１０はフランジ１８を介
して磁気シールド体１７に剛結合手段、例えば、ボルト
で完全締結されているとともに、弾性支持手段のベロー
ズ１９及び、フランジ１８を介して真空容器７に一体化
されている。It weighs several tons. The expander 10 is completely connected to the magnetic shielding body 17 via a flange 18 with rigid coupling means, such as bolts, and is integrated with the vacuum container 7 via a bellows 19 as an elastic support means and the flange 18. There is.
また、膨張機１０の頭部及び配管１１．１２を吸音材を
内張すした遮音カバー２０で囲い、遮音カバー２０を磁
気シールド体に固定している。Further, the head of the expander 10 and the pipes 11, 12 are surrounded by a sound insulating cover 20 lined with a sound absorbing material, and the sound insulating cover 20 is fixed to a magnetic shield.
膨張機１０の振動は、フランジ１８を介して質量が膨張
機の１００倍以上にもなる磁気シールド体１７に吸収さ
れるため、弾性支持体のベローズ１９で接続している真
空容器７にこの振動はほとんど伝般しない。したがって
、真空容器に共鳴するＵ音はほとんど無くなり、騒音が
大幅に低減する。The vibrations of the expander 10 are absorbed through the flange 18 by the magnetic shield 17, which has a mass more than 100 times that of the expander. is hardly common. Therefore, the U sound that resonates in the vacuum container is almost eliminated, and the noise is significantly reduced.
また、膨、張機自身が発する騒音は、配管１１゜１２を
含めて膨張機頭部を囲んだ遮音カバー内で吸収されるの
で外部にほとんど漏れず、膨張機の騒音が大幅に低減す
る。一方、膨張機の自重及び真空圧力荷重は、フランジ
１８を介して剛な磁気シールド体１７で支持されている
ので、膨張機にこれらの荷重が作用してもほとんど変位
しない。In addition, the noise generated by the expansion machine itself is absorbed within the sound insulating cover that surrounds the head of the expander including the pipes 11 and 12, so that almost no leakage occurs to the outside, and the noise of the expander is significantly reduced. On the other hand, since the expander's own weight and vacuum pressure load are supported by the rigid magnetic shield 17 via the flange 18, even if these loads act on the expander, the expander will hardly be displaced.
したがって、膨張機の運転時においても振動する部分が
ないので疲労破壊等は発生せず、ベローズにき裂に生じ
て真空がリークしたり、弾性伝熱体にき裂が生じて冷却
性能が低下し熱シールド筒の温度が上昇する様なトラブ
ルが起らない信頼性の高いクライオスタットを提供でき
る。また、熱シールド筒は膨張機の支持部材となる必要
がなく、肉厚１μｒＴ１程度のアルミニウムで製作でき
、熱シールド槽や筒が軽量にでき、冷却速度も早くする
ことができる。Therefore, even when the expander is in operation, there are no vibrating parts, so fatigue failure does not occur, and cracks may form in the bellows, causing vacuum leaks, or cracks may form in the elastic heat transfer body, reducing cooling performance. Therefore, it is possible to provide a highly reliable cryostat that does not cause troubles such as the temperature of the heat shield tube rising. Furthermore, the heat shield tube does not need to be a support member for the expander, and can be made of aluminum with a wall thickness of about 1 μrT1, making it possible to make the heat shield tank and tube lighter and to increase the cooling rate.
本実施例によれば、冷凍機の振動に起因する騒音を低減
でき、冷凍機付きクライオスタットの信頼性を高め、熱
シールド槽や筒を軽量化できる効果がある。According to this embodiment, it is possible to reduce the noise caused by the vibration of the refrigerator, improve the reliability of the cryostat with a refrigerator, and reduce the weight of the heat shield tank and cylinder.
なお１本実施例では、膨張材と真空容器をベローズで弾
性的に結合したが、振動は磁気シールド体で吸収するの
で薄肉円筒で結合しても、低騒音化を図ることができる
。In this embodiment, the expansion material and the vacuum container are elastically coupled by a bellows, but since vibrations are absorbed by a magnetic shield, noise can be reduced even if the material is coupled by a thin cylinder.
また、膨張機に、シリンダを２重構造にしてその間に伝
熱媒体のガスヘリウム補充した２重シリンダ形を使用し
ても同様な効果を生じる。Furthermore, the same effect can be obtained by using a double cylinder type expander in which the cylinder has a double structure and the space between the cylinders is supplemented with gas helium as a heat transfer medium.
第２図及び第３図は本発明になる他の実施例を示すもの
で、膨張機を横方向に取付けた構造が第１図と異なる。FIGS. 2 and 3 show other embodiments of the present invention, which differ from FIG. 1 in the structure in which the expander is mounted laterally.
第３図は第２図の側面図である。FIG. 3 is a side view of FIG. 2.
本実施例では、膨張機を横向きに取付けるため、フラン
ジ１８を磁気シールド体１７に締結固定するまで、解体
離脱可能な固定支持体２１をフランジ１８に設けその端
部を真空容ｓ７に接続し、膨張機の位置決めや、クライ
オスタット輸送中の振動防止に使用する。In this embodiment, since the expander is installed horizontally, a fixing support 21 that can be dismantled and removed is provided on the flange 18 until the flange 18 is fastened and fixed to the magnetic shield 17, and its end is connected to the vacuum volume s7. Used for positioning the expander and preventing vibration during transport of the cryostat.
本実施例によれば、膨張機を磁気シールド体に取付ける
前に、膨張機の位置決めを容易に行え、クライオスタッ
ト輸送時に磁気シールド体を分けて輸送できる効果があ
る。According to this embodiment, it is possible to easily position the expander before attaching the expander to the magnetic shield, and the magnetic shield can be transported separately when transporting the cryostat.
本発明によれば、膨張機と真空容器とをベローズで弾性
的に一体化し、膨張機の自重及び真空圧力荷重をクライ
オスタット外の質量の大きい磁気シルールド体で剛に支
持したので、膨張機の振動は磁気シールド体に吸収され
、真空容器には伝搬せず、騒音を低減できると共に、膨
張機を強固に固定できるので振動変化する部分がな・く
信頼性が高く、かつ、熱シールド槽や熱シール１〜筒を
、板厚が薄い、軽量な素材で楕成できるので、ｆｉ量な
冷凍機付クライオスタットを得ることができる。According to the present invention, the expander and the vacuum container are elastically integrated with a bellows, and the expander's own weight and vacuum pressure load are rigidly supported by a large-mass magnetic shield body outside the cryostat. is absorbed by the magnetic shield and does not propagate to the vacuum vessel, reducing noise. The expander can be firmly fixed, so there are no parts that vibrate, making it highly reliable. Since the seal 1 to the cylinder can be made of a thin and lightweight material, a cryostat with a refrigerator having a high fi quantity can be obtained.
第１図は本発明の一実施例を示す冷凍機付きクライオス
タットの断面図、第２図は他の′Ｘ、施例を説明する冷
凍機付きクラ、イオスタットの断面図。
第３図は第２図の側面図である。FIG. 1 is a sectional view of a cryostat with a refrigerator showing one embodiment of the present invention, and FIG. 2 is a sectional view of a cryostat with a refrigerator illustrating another embodiment. FIG. 3 is a side view of FIG. 2.
Claims (1)
断熱槽に納めた冷凍機付きクライオスタットにおいて、
前記断熱槽以外の構成部材の一部に前記冷凍機を剛結合
手段で一体化したことを特徴とする冷凍機付きクライオ
スタット。 ２、前記冷凍機と前記断熱槽外壁とを弾性支持手段で結
合したことを特徴とする特許請求の範囲第１項記載の冷
凍機付きクライオスタット。 ３、前記断熱槽より外側に出ている冷凍機部分を囲う遮
音手段を設け、前記遮音手段を前記構成部材又は真空容
器に結合したことを特徴とする特許請求の範囲第１項記
載の冷凍機付きクライオスタット。 ４、前記冷凍機に接続した配管をも遮音手段で囲つたこ
とを特徴とする特許請求の範囲第３項記載の冷凍機付き
クライオスタット。 ５、前記冷凍機と前記断熱槽外壁とを、脱装着可能な剛
結合手段で一時的に一体化したことを特徴とする特許請
求の範囲第２項記載の冷凍機付きクライオスタット。 ６、冷凍機をクライオスタット外の剛部材に固定し、冷
凍機とクライオスタット間を気密手段で連結してなるこ
とを特徴とする冷凍機付きクライオスタット。 ７、自己磁気シールド板に冷凍機取付け手段を設けるこ
とを特徴とするクライオスタット用部品。 ８、冷凍機をクライオスタットよりも質量の大きい若し
くは固有振動数が小さい他部材に固定することを特徴と
する冷凍機付きクライオスタット。 ９、請求項１の前記剛結合手段に磁気シールド板を用い
ることを特徴とする核磁気共鳴装置。[Claims] 1. A cryostat with a refrigerator in which a cooled object and a low-temperature end of the refrigerator for cooling the cooled object are housed in an insulation tank,
A cryostat with a refrigerator, characterized in that the refrigerator is integrated with a part of the component other than the heat insulating tank by a rigid coupling means. 2. The cryostat with a refrigerator as set forth in claim 1, wherein the refrigerator and the outer wall of the heat insulating tank are connected by elastic support means. 3. The refrigerator according to claim 1, characterized in that a sound insulation means is provided to surround a portion of the refrigerator protruding outside the insulation tank, and the sound insulation means is coupled to the structural member or the vacuum container. with cryostat. 4. A cryostat with a refrigerator as set forth in claim 3, characterized in that a pipe connected to the refrigerator is also surrounded by sound insulating means. 5. The cryostat with a refrigerator according to claim 2, wherein the refrigerator and the outer wall of the heat insulating tank are temporarily integrated by a removable rigid coupling means. 6. A cryostat with a refrigerator, characterized in that the refrigerator is fixed to a rigid member outside the cryostat, and the refrigerator and the cryostat are connected by airtight means. 7. A cryostat component characterized in that a self-magnetic shielding plate is provided with a means for attaching a refrigerator. 8. A cryostat with a refrigerator, characterized in that the refrigerator is fixed to another member having a larger mass or a lower natural frequency than the cryostat. 9. A nuclear magnetic resonance apparatus characterized in that a magnetic shield plate is used as the rigid coupling means according to claim 1.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63230009A JP2741875B2 (en) | 1988-09-16 | 1988-09-16 | Cryostat with refrigerator |
| US07/406,235 US4959964A (en) | 1988-09-16 | 1989-09-12 | Cryostat with refrigerator containing superconductive magnet |
| DE1989613404 DE68913404T2 (en) | 1988-09-16 | 1989-09-14 | A cooling cryostat containing a superconducting magnet. |
| EP19890117038 EP0359262B1 (en) | 1988-09-16 | 1989-09-14 | Cryostat with refrigerator containing superconductive magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63230009A JP2741875B2 (en) | 1988-09-16 | 1988-09-16 | Cryostat with refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0281486A true JPH0281486A (en) | 1990-03-22 |
| JP2741875B2 JP2741875B2 (en) | 1998-04-22 |
Family
ID=16901165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63230009A Expired - Fee Related JP2741875B2 (en) | 1988-09-16 | 1988-09-16 | Cryostat with refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2741875B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007194260A (en) * | 2006-01-17 | 2007-08-02 | Hitachi Ltd | Superconductive electromagnet |
| US8989827B2 (en) | 2011-03-22 | 2015-03-24 | Mitsubishi Electric Corporation | Superconducting magnet |
| CN107863218A (en) * | 2017-11-09 | 2018-03-30 | 西安聚能超导磁体科技有限公司 | A kind of device and method for effectively reducing refrigeration machine vibration |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6351849A (en) * | 1986-08-22 | 1988-03-04 | 株式会社東芝 | Medical nuclear magnetic resonance diagnostic apparatus |
| JPH0197511U (en) * | 1987-12-21 | 1989-06-29 |
-
1988
- 1988-09-16 JP JP63230009A patent/JP2741875B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6351849A (en) * | 1986-08-22 | 1988-03-04 | 株式会社東芝 | Medical nuclear magnetic resonance diagnostic apparatus |
| JPH0197511U (en) * | 1987-12-21 | 1989-06-29 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007194260A (en) * | 2006-01-17 | 2007-08-02 | Hitachi Ltd | Superconductive electromagnet |
| US8989827B2 (en) | 2011-03-22 | 2015-03-24 | Mitsubishi Electric Corporation | Superconducting magnet |
| CN107863218A (en) * | 2017-11-09 | 2018-03-30 | 西安聚能超导磁体科技有限公司 | A kind of device and method for effectively reducing refrigeration machine vibration |
| CN107863218B (en) * | 2017-11-09 | 2024-03-26 | 西安聚能超导磁体科技有限公司 | Device and method for effectively reducing vibration of refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2741875B2 (en) | 1998-04-22 |
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