JP4636491B2 - Cryogenic fluid tank - Google Patents

Cryogenic fluid tank Download PDF

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JP4636491B2
JP4636491B2 JP2004191337A JP2004191337A JP4636491B2 JP 4636491 B2 JP4636491 B2 JP 4636491B2 JP 2004191337 A JP2004191337 A JP 2004191337A JP 2004191337 A JP2004191337 A JP 2004191337A JP 4636491 B2 JP4636491 B2 JP 4636491B2
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opening
inner shell
cryogenic fluid
outer shell
fluid tank
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JP2006010036A (en
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文春 並木
秀介 稲木
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IHI Aerospace Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

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Description

本発明は、液体水素や液体酸素などの極低温流体を蓄えるのに用いる極低温流体用タンクに関するものである。   The present invention relates to a cryogenic fluid tank used to store a cryogenic fluid such as liquid hydrogen or liquid oxygen.

極低温流体用タンクは、かつては主に金属製であったが、近年ではさらなる高強度化や軽量化が要求されており、これに応じて、極低温流体に対してバリア性を有する金属製の内殻（ライナ）と、主として強度を維持するための複合材製の外殻を備えたものが開発されている。このタンクは、内殻と外殻を接着により一体化することにより、加圧時の強度保持及び除圧時の構造安定性を保つものである。また、このような二層構造のタンクとしては、極低温流体用以外のものとして、バリア性を受け持つプラスチック製のライナと強度を受け持つ複合材製のシェルから成るものがあった。
特開２０００−３５１９６号公報 Cryogenic fluid tanks were once mainly made of metal, but in recent years, there has been a demand for higher strength and lighter weight. Have been developed, and a composite outer shell mainly for maintaining strength. In this tank, the inner shell and the outer shell are integrated by bonding to maintain the strength during pressurization and the structural stability during decompression. Further, as such a two-layer tank, there is a tank composed of a plastic liner having a barrier property and a composite shell having a strength, except for a cryogenic fluid.
JP 2000-35196 A

ところが、上記したような従来のタンクにおいて、とくに、金属製の内殻と複合材製の外殻を備えた極低温流体用タンクにあっては、例えば−１５０℃以下の極低温流体を注入していくと、内殻と外殻の線膨張係数が異なることから、開口部において、金属製の内殻が内側に変形するとともに複合材製の外殻が外側に変形し、これにより内殻と外殻の接合端部に過大な応力が発生し、双方の間で剥離が生じてタンクとしての機能を損なう恐れがあるという問題点があった。   However, in the conventional tank as described above, particularly in a cryogenic fluid tank having a metal inner shell and a composite outer shell, for example, a cryogenic fluid of −150 ° C. or less is injected. As the inner and outer shells have different linear expansion coefficients, the metal inner shell is deformed inward and the composite outer shell is deformed outward in the opening. There is a problem in that excessive stress is generated at the joint end portion of the outer shell, and there is a possibility that separation occurs between the two to impair the function as a tank.

本発明は、上記従来の状況に鑑みて成されたもので、少なくとも開口部の周囲部分が金属製である内殻と複合材製の外殻を備えた極低温流体用タンクにおいて、開口部における内殻と外殻の剥離を防止することができる極低温流体用タンクを提供することを目的としている。   The present invention has been made in view of the above-described conventional situation. In a cryogenic fluid tank having an inner shell made of metal and an outer shell made of a composite material at least around the opening, An object of the present invention is to provide a cryogenic fluid tank capable of preventing the inner shell and the outer shell from peeling off.

本発明は、請求項１として、開口部を有する極低温流体用タンクであって、少なくとも開口部の周囲部分が金属製である内殻と複合材製の外殻を備え、外殻が、内殻の外側にフィラメントワインディング法に基づいて形成したプリフォームを加熱して硬化することにより前記内殻と一体化したものであり、開口部の周囲部分に、内殻と外殻を互いに拘束する固定手段を備え、固定手段が、外殻を内殻に固定するボルトを備えている構成とし、請求項２として、固定手段が、開口部の周囲部分を外側から覆うクランプディスクと、クランプディスクを内殻に固定するボルトを備えている構成とし、請求項３として、内殻の開口部周縁に、同開口部の中心方向に突出する止着部を備えると共に、固定手段が、止着部を含む開口部の周囲部分を外側から覆うクランプディスクと、クランプディスクを止着部に固定するボルト及びナットを備えている構成とし、請求項４として、クランプディスクが、複合材製である構成としており、上記構成をもって従来の課題を解決するための手段としている。 According to a first aspect of the present invention, there is provided a cryogenic fluid tank having an opening, which includes an inner shell made of metal and a outer shell made of a composite material at least around the opening . A preform formed on the outside of the shell based on the filament winding method is heated and cured to be integrated with the inner shell, and the inner shell and the outer shell are fixed to each other around the opening. comprising means are fixing means, a configuration that has a bolt for fixing the outer shell to the inner shell, as claimed in claim 2, fixed means, and the clamp disc covering the periphery of the opening from the outside, the clamping disc According to a third aspect of the present invention, a bolt is provided to be fixed to the inner shell. According to a third aspect of the present invention, a fixing portion that protrudes in the center direction of the opening is provided at the periphery of the opening of the inner shell, and the fixing means includes the fixing portion. The outer part around the opening including A clamping disc et cover, a structure that comprises a bolt and nut to secure the clamp disc in the fastening portion, as claimed in claim 4, the clamping disk has a structure which is made of composite material, the conventional problems with the above configuration As a means to solve.

本発明の請求項１に係わる極低温流体用タンクによれば、内殻と外殻との一体化により加圧時の強度保持及び除圧時の構造安定性を保つことができるうえに、極低温流体を充填した際、開口部において内殻と外殻とが相反する方向に変形しようとしても、内殻と外殻の接合端部で発生する応力を低減して双方の剥離を防止することができ、当該タンクの機能を良好に維持し得る。また、固定手段としてのボルトを採用したことから、構造の簡略化や低コスト化などを実現することができる。 According to the cryogenic fluid tank according to claim 1 of the present invention, the inner shell and the outer shell can be integrated to maintain the strength during pressurization and the structural stability during decompression. When filling the cryogenic fluid, even if the inner shell and the outer shell are deformed in the opposite direction at the opening, the stress generated at the joint end of the inner shell and the outer shell is reduced to prevent separation of both. The tank function can be maintained well. Further, since the bolt as the fixing means is employed, the structure can be simplified and the cost can be reduced.

本発明の請求項２に係わる極低温流体用タンクによれば、請求項１と同様の効果を得ることができるうえに、固定手段としてクランプディスクとボルトを採用したことから、とくにクランプディスクにより、開口部の周囲部分に対してより充分な範囲で内殻及び外殻の変形を抑制することができ、内殻と外殻の接合端部で発生する応力をさらに低減して内殻と外殻の剥離防止をより確実にし得るものとなる。 According to the cryogenic fluid tank according to claim 2 of the present invention, the same effect as in claim 1 can be obtained, and since a clamp disk and a bolt are employed as fixing means, The deformation of the inner shell and the outer shell can be suppressed to a sufficient extent with respect to the peripheral portion of the opening, and the stress generated at the joint end of the inner shell and the outer shell can be further reduced to reduce the inner shell and the outer shell. It is possible to more reliably prevent the peeling.

本発明の請求項３に係わる極低温流体用タンクによれば、内殻の開口部周縁に止着部を設けると共に、固定手段としてクランプディスクとボルト及びナットを採用したことから、請求項２と同様に、開口部の周囲部分に対してより充分な範囲で内殻及び外殻の変形を抑制することができ、とくに内殻の止着部と外殻の接合端部で発生する応力を低減して内殻と外殻の剥離防止をより確実にし得るものとなる。 According to the cryogenic fluid tank according to claim 3 of the present invention, provided with a fastening portion to the opening portion of the inner shell, since employing the clamp disc and bolts and nuts as the fixing means, and claim 2 Similarly, the deformation of the inner shell and outer shell can be suppressed to a sufficient extent with respect to the peripheral portion of the opening, particularly reducing the stress generated at the joint end of the inner shell and the outer shell. Thus, the inner shell and outer shell can be more reliably prevented from peeling off.

本発明の請求項４に係わる極低温流体用タンクによれば、請求項２及び３と同様の効果を得ることができるうえに、クランプディスクを複合材製としたことから、複合材製の外殻との密着性を高めることが可能となり、又は外殻と一体的に成形することが可能となり、内殻及び外殻の変形抑制機能や内殻と外殻の剥離防止機能のさらなる向上を実現することができる。また、複合材製のクランプディスクを採用することで、クランプディスクからタンク本体部分に至るタンク表面がより滑らかになり、外部からの超音波探傷等における欠陥検出能力を向上し得るという利点がある。 According to the cryogenic fluid tank of claim 4 of the present invention, the same effects as in claims 2 and 3 can be obtained, and the clamp disk is made of composite material. It is possible to improve the adhesion to the shell, or it can be molded integrally with the outer shell, realizing further improvement of the inner shell and outer shell deformation suppression function and the inner shell and outer shell peeling prevention function. can do. In addition, the use of a composite clamp disc has the advantage that the tank surface from the clamp disc to the tank main body becomes smoother and the defect detection capability in ultrasonic flaw detection from the outside can be improved.

図１は、本発明の極低温流体用タンクの一実施例を説明する図である。図１（ａ）に示す極低温流体用タンクＡは、液体水素や液体酸素等の極低温流体を蓄えるのに用いるものであって、円筒部Ｂの両側にドーム（鏡板）Ｃ，Ｃを備えると共に、少なくとも片側のドームＣの中央に円形の開口部Ｈを有している。   FIG. 1 is a view for explaining an embodiment of a cryogenic fluid tank of the present invention. A cryogenic fluid tank A shown in FIG. 1A is used to store a cryogenic fluid such as liquid hydrogen or liquid oxygen, and includes domes (end plates) C and C on both sides of a cylindrical portion B. In addition, a circular opening H is provided at the center of at least one dome C.

この極低温流体用タンクＡは、図１（ｂ）に示すように、極低温流体に対してバリア性を有する金属製の内殻（ライナ）１と、主に強度を維持するための複合材製の外殻２を備た二重構造になっており、内殻１と外殻２を一体化することで、加圧時の強度保持及び除圧時の構造安定性を保つものとなっている。   As shown in FIG. 1B, the cryogenic fluid tank A is composed of a metal inner shell (liner) 1 having a barrier property against a cryogenic fluid, and a composite material mainly for maintaining strength. It has a double structure with an outer shell 2 made of it. By integrating the inner shell 1 and the outer shell 2, the strength retention during pressurization and the structural stability during decompression are maintained. Yes.

内殻１には、例えばアルミニウム合金を用い、一方、外殻２には、例えばガラス繊維や炭素繊維を強化材とした繊維強化プラスチックを用いる。外殻２は、フィラメントワインディング法に基づいて、マトリックス樹脂を含浸した連続繊維を内殻１の外側に巻付けてプリフォームを形成し、このプリフォームを加圧及び加熱して硬化させることで、内殻１と一体化したものとなる。 The inner shell 1 is made of, for example, an aluminum alloy, while the outer shell 2 is made of, for example, fiber reinforced plastic using glass fiber or carbon fiber as a reinforcing material. Outer shell 2, based on the full I Lament winding method, to form a preform wound on the outside of the inner shell 1 a continuous fiber impregnated with a matrix resin, by curing the preform pressurized and heated to , Integrated with the inner shell 1.

内殻１は、開口部Ｈの周囲部分が厚肉に形成してあり、この厚肉部分を口金として使用する。このため、内殻１の厚肉部分には、開口部Ｈの周方向に沿って適数のめねじ孔３が形成してあり、これらのめねじ孔３を用いてクロージャや流体用のアダプタといった図示しない部材を気密的に接続する。   The inner shell 1 has a thick portion around the opening H, and this thick portion is used as a base. For this reason, an appropriate number of female screw holes 3 are formed in the thick portion of the inner shell 1 along the circumferential direction of the opening H, and a closure or a fluid adapter is used by using these female screw holes 3. Such members (not shown) are connected in an airtight manner.

また、極低温流体用タンクＡは、開口部Ｈの周囲部分に、内殻１と外殻２を互いに拘束する固定手段を備えており、この実施例では、固定手段として、外殻２を内殻１に固定するボルト４を用いている。このボルト４は、外殻２の取付け孔５を通して内殻１のめねじ孔６に螺着してあると共に、開口部Ｈの周方向に沿って所定間隔で設けてある。   Further, the cryogenic fluid tank A is provided with a fixing means for restraining the inner shell 1 and the outer shell 2 to each other around the opening H. In this embodiment, the outer shell 2 is used as the fixing means. Bolts 4 that are fixed to the shell 1 are used. The bolts 4 are screwed into the female screw holes 6 of the inner shell 1 through the mounting holes 5 of the outer shell 2 and are provided at predetermined intervals along the circumferential direction of the opening H.

上記の構成を備えた極低温流体用タンクＡは、例えば−１５０℃以下の極低温流体を注入していくと、金属製の内殻１と複合材製の外殻２の線膨張係数が異なることから、とくに開口部Ｈにおいて、内殻１と外殻２が相反する方向に変形しようとするが、開口部Ｈの周囲部分において、ボルト４により内殻１と外殻２を互いに機械的に拘束しているので、内殻１と外殻２の接合端部で発生する応力を低減して双方の剥離を防止し、タンクとしての機能を良好に維持し得るものとなる。   When the cryogenic fluid tank A having the above-described configuration is injected with a cryogenic fluid of −150 ° C. or less, for example, the linear expansion coefficient of the metallic inner shell 1 and the composite outer shell 2 is different. Therefore, especially in the opening H, the inner shell 1 and the outer shell 2 try to deform in opposite directions. However, in the peripheral portion of the opening H, the inner shell 1 and the outer shell 2 are mechanically connected to each other by the bolt 4. Since they are restrained, the stress generated at the joint end portion of the inner shell 1 and the outer shell 2 is reduced to prevent the peeling of both, and the function as a tank can be maintained satisfactorily.

図２は、本発明の極低温流体用タンクの他の実施例を説明する図である。図２（ａ）に示す極低温流体用タンクＡは、先の実施例と同様に、円筒部Ｂの両側にドーム（鏡板）Ｃ，Ｃを備えると共に、少なくとも片側のドームＣの中央に円形の開口部Ｈを有しており、金属製の内殻１と複合材製の外殻２を備えた二重構造になっている。   FIG. 2 is a view for explaining another embodiment of the cryogenic fluid tank of the present invention. The cryogenic fluid tank A shown in FIG. 2 (a) is provided with domes (end plates) C and C on both sides of the cylindrical portion B and a circular shape at the center of at least one dome C as in the previous embodiment. It has an opening H, and has a double structure including a metal inner shell 1 and a composite outer shell 2.

極低温流体用タンクＡは、図２（ｂ）に示すように、開口部Ｈの周囲部分に、内殻１と外殻２を互いに拘束する固定手段を備えており、この実施例では、固定手段として、開口部Ｈの周囲部分を外側から覆うクランプディスク７と、クランプディスク７を内殻１に固定するボルト８を備えている。   As shown in FIG. 2B, the cryogenic fluid tank A includes a fixing means for restraining the inner shell 1 and the outer shell 2 to each other around the opening H. In this embodiment, the cryogenic fluid tank A is fixed. As means, a clamp disk 7 that covers the peripheral portion of the opening H from the outside and a bolt 8 that fixes the clamp disk 7 to the inner shell 1 are provided.

クランプディスク７は、環状を成すと共に、内殻１の厚肉部分から外殻２にかけてその外側を覆う大きさを有している。また、クランプディスク７は、各種材料を用いることが可能であるが、とくに好ましい例として複合材を用いることができ、この場合、予め成形したものを外殻２の成形後に取付けたり、先述した外殻２のプリフォームとともに硬化成形したりすることができる。このようにクランプディスク７を複合材製とすることで、同じく複合材製の外殻２との密着性がより一層高められ、クランプディスク７からタンク本体部分に至るタンク表面をより滑らかにし得ることとなる。   The clamp disk 7 has a ring shape and a size that covers the outer side from the thick part of the inner shell 1 to the outer shell 2. Various materials can be used for the clamp disk 7, and a composite material can be used as a particularly preferable example. In this case, a pre-formed one can be attached after the outer shell 2 is formed, It can be cured and molded together with the preform of the shell 2. Thus, by making the clamp disk 7 made of a composite material, the adhesion with the outer shell 2 made of the composite material can be further enhanced, and the tank surface from the clamp disk 7 to the tank body can be made smoother. It becomes.

また、ボルト８は、クランプディスク７の取付け孔９を通して内殻１のめねじ孔１０に螺着してあると共に、開口部Ｈの周方向に沿って所定間隔で設けてある。   The bolts 8 are screwed into the female screw holes 10 of the inner shell 1 through the attachment holes 9 of the clamp disk 7 and are provided at predetermined intervals along the circumferential direction of the opening H.

上記の構成を備えた極低温流体用タンクＡは、先の実施例と同様に、極低温流体を注入していくと、開口部Ｈにおいて内殻１と外殻２が相反する方向に変形しようとするが、開口部Ｈの周囲部分において、クランプディスク７及びボルト８により内殻１と外殻２を互いに機械的に拘束しているので、開口部Ｈの周囲部分に対してより充分な範囲で内殻１及び外殻２の変形を抑制することができ、内殻１と外殻２の接合端部で発生する応力をさらに低減して、内殻１と外殻２の剥離防止をより確実にし得るものとなる。また、複合材製のクランプディスク７を採用すれば、上記の如くタンク表面が滑らかになるので、後に行う外部からの超音波探傷等において欠陥検出性能を向上し得る。   In the cryogenic fluid tank A having the above-described configuration, as the cryogenic fluid is injected, the inner shell 1 and the outer shell 2 are deformed in opposite directions at the opening H as in the previous embodiment. However, since the inner shell 1 and the outer shell 2 are mechanically restrained by the clamp disk 7 and the bolt 8 in the peripheral portion of the opening H, a more sufficient range than the peripheral portion of the opening H is obtained. Can suppress the deformation of the inner shell 1 and the outer shell 2, further reduce the stress generated at the joint end of the inner shell 1 and the outer shell 2, and further prevent the inner shell 1 and the outer shell 2 from peeling off. It can be certain. Further, if the composite clamp disk 7 is employed, the tank surface becomes smooth as described above, so that the defect detection performance can be improved in the ultrasonic inspection from the outside to be performed later.

図３は、本発明の極低温流体用タンクのさらに他の実施例を説明する図である。図３（ａ）に示す極低温流体用タンクＡは、先の実施例と同様に、円筒部Ｂの両側にドーム（鏡板）Ｃ，Ｃを備えると共に、少なくとも片側のドームＣの中央に円形の開口部Ｈを有しており、金属製の内殻１と複合材製の外殻２を備えた二重構造になっている。   FIG. 3 is a view for explaining still another embodiment of the cryogenic fluid tank of the present invention. The cryogenic fluid tank A shown in FIG. 3 (a) is provided with domes (end plates) C and C on both sides of the cylindrical portion B and a circular shape at the center of at least one dome C as in the previous embodiment. It has an opening H, and has a double structure including a metal inner shell 1 and a composite outer shell 2.

極低温流体用タンクＡは、図３（ｂ）に示すように、内殻１の開口部Ｈの内側に沿って環状溝１１を形成することで、内殻１の開口部Ｈの周縁に、同開口部Ｈの中心方向に突出する止着部１２が形成してあると共に、開口部Ｈの周囲部分に、内殻１と外殻２を互いに拘束する固定手段を備えており、この実施例では、固定手段として、止着部１２を含む開口部Ｈの周囲部分を外側から覆うクランプディスク１３と、クランプディスク１３を止着部１２に固定するボルト１４及びナット１５を備えている。   As shown in FIG. 3 (b), the cryogenic fluid tank A is formed on the periphery of the opening H of the inner shell 1 by forming an annular groove 11 along the inner side of the opening H of the inner shell 1. A fastening portion 12 protruding in the center direction of the opening H is formed, and a fixing means for restraining the inner shell 1 and the outer shell 2 to each other is provided around the opening H. Then, as a fixing means, a clamp disk 13 that covers the peripheral portion of the opening H including the fastening part 12 from the outside, and a bolt 14 and a nut 15 that fix the clamp disk 13 to the fastening part 12 are provided.

クランプディスク１３は、先の実施例と同様に環状を成すと共に、止着部１２から外殻２にかけてその外側を覆う大きさを有しており、各種材料を用いることが可能であるが、先の実施例で説明したように複合材製とすることで、同じく複合材製の外殻２との密着性がより一層高められるなどの利点がある。   The clamp disk 13 has an annular shape as in the previous embodiment, and has a size covering the outside from the fastening portion 12 to the outer shell 2, and various materials can be used. As described in the embodiment, the use of the composite material has the advantage that the adhesion to the outer shell 2 made of the composite material is further enhanced.

また、ボルト１４は、クランプディスク１３の取付け孔１６及び止着部１２の取付け孔１７に挿通され、環状溝１１内に設けたナット１５に螺着してある。このボルト１４及びナット１５は、開口部Ｈの周方向に沿って所定間隔で設けてある。なお、クランプディスク１３及び止着部１２におけるボルト１４の挿通部分は、上記の如く取付け孔１６，１７とするほか、開口部Ｈ側に開放されたＵ形の切欠きにしても良い。   The bolt 14 is inserted into the mounting hole 16 of the clamp disk 13 and the mounting hole 17 of the fastening portion 12 and is screwed to a nut 15 provided in the annular groove 11. The bolts 14 and the nuts 15 are provided at predetermined intervals along the circumferential direction of the opening H. In addition, the insertion part of the volt | bolt 14 in the clamp disc 13 and the fixing | fixed part 12 may be made into the U-shaped notch open | released to the opening H side other than the attachment holes 16 and 17 as mentioned above.

上記の構成を備えた極低温流体用タンクＡは、先の実施例と同様に、極低温流体を注入していくと、開口部Ｈにおいて内殻１と外殻２が相反する方向に変形しようとするが、開口部Ｈの周囲部分において、クランプディスク１３とボルト１４及びナット１５により内殻１の止着部１２と外殻２を互いに機械的に拘束しているので、開口部Ｈの周囲部分に対してより充分な範囲で内殻１及び外殻２の変形を抑制することができ、とくに内殻１の止着部１２と外殻２の接合端部で発生する応力をさらに低減して、内殻１と外殻２の剥離防止をより確実にし得るものとなる。   In the cryogenic fluid tank A having the above-described configuration, as the cryogenic fluid is injected, the inner shell 1 and the outer shell 2 are deformed in opposite directions at the opening H as in the previous embodiment. However, since the fastening portion 12 and the outer shell 2 of the inner shell 1 are mechanically restrained by the clamp disk 13, the bolt 14, and the nut 15 in the peripheral portion of the opening H, the periphery of the opening H The deformation of the inner shell 1 and the outer shell 2 can be suppressed in a more sufficient range with respect to the portion, and in particular, the stress generated at the joining end portion of the inner shell 1 and the outer shell 2 can be further reduced. Thus, the inner shell 1 and the outer shell 2 can be more reliably prevented from being peeled off.

なお、本発明に係わる極低温流体用タンクは、その詳細な構成が上記各実施例のみに限定されるものではなく、各構成の数や形態を適宜変更することができる。また、上記各実施例では、いずれも金属製の内殻１を備えた極低温流体用タンクを例示したが、本発明に係わる極低温流体用タンクは、少なくとも開口部の周囲部分が金属製である内殻を備えたものに適用可能であって、例えば、開口部を形成する金属製の口金と、極低温流体に対してバリア性を有するプラスチック製の本体部分とから成る内殻を備えた極低温流体用タンクにおいても、上記各実施例と同様の効果を得ることができる。   The cryogenic fluid tank according to the present invention is not limited in its detailed configuration to the above embodiments, and the number and form of each component can be changed as appropriate. In each of the above embodiments, the cryogenic fluid tank provided with the metal inner shell 1 is exemplified. However, the cryogenic fluid tank according to the present invention is made of metal at least around the opening. Applicable to an apparatus having an inner shell, for example, an inner shell comprising a metal base forming an opening and a plastic main body portion having a barrier property against a cryogenic fluid. Also in the cryogenic fluid tank, the same effects as those of the above embodiments can be obtained.

本発明の極低温流体用タンクの一実施例を示すタンク全体の概略説明図（ａ）及び開口部付近の拡大断面図（ｂ）である。It is the schematic explanatory drawing (a) of the whole tank which shows one Example of the tank for cryogenic fluids of this invention, and the expanded sectional view of the opening part vicinity (b). 本発明の極低温流体用タンクの他の実施例を示すタンク全体の概略説明図（ａ）及び開口部付近の拡大断面図（ｂ）である。It is the schematic explanatory drawing (a) of the whole tank which shows the other Example of the cryogenic fluid tank of this invention, and the expanded sectional view (b) near opening part. 本発明の極低温流体用タンクのさらに他の実施例を示すタンク全体の概略説明図（ａ）及び開口部付近の拡大断面図（ｂ）である。It is the schematic explanatory drawing (a) of the whole tank which shows the further another Example of the cryogenic fluid tank of this invention, and the expanded sectional view (b) vicinity of an opening part.

符号の説明Explanation of symbols

Ａ 極低温流体用タンク
Ｈ 開口部
１ 内殻
２ 外殻
４ ボルト（固定手段）
７ クランプディスク（固定手段）
８ ボルト（固定手段）
１２ 止着部
１３ クランプディスク（固定手段）
１４ ボルト（固定手段）
１５ ナット（固定手段）
A Cryogenic fluid tank H Opening 1 Inner shell 2 Outer shell 4 Bolt (fixing means)
7 Clamp disc (fixing means)
8 bolts (fixing means)
12 Fastening part 13 Clamp disk (fixing means)
14 bolts (fixing means)
15 Nut (fixing means)

Claims (4)

開口部を有する極低温流体用タンクであって、少なくとも開口部の周囲部分が金属製である内殻と複合材製の外殻を備え、
外殻が、内殻の外側にフィラメントワインディング法に基づいて形成したプリフォームを加熱して硬化することにより前記内殻と一体化したものであり、
開口部の周囲部分に、内殻と外殻を互いに拘束する固定手段を備え、固定手段が、外殻を内殻に固定するボルトを備えていることを特徴とする極低温流体用タンク。 A cryogenic fluid tank having an opening, comprising an inner shell made of metal and an outer shell made of a composite material at least around the opening,
The outer shell is integrated with the inner shell by heating and curing a preform formed on the outside of the inner shell based on the filament winding method,
A cryogenic fluid tank characterized by comprising a fixing means for restraining the inner shell and the outer shell to each other around the opening, and the fixing means includes a bolt for fixing the outer shell to the inner shell . 固定手段が、開口部の周囲部分を外側から覆うクランプディスクと、クランプディスクを内殻に固定するボルトを備えていることを特徴とする請求項１に記載の極低温流体用タンク。   2. The cryogenic fluid tank according to claim 1, wherein the fixing means includes a clamp disk that covers a peripheral portion of the opening from the outside and a bolt that fixes the clamp disk to the inner shell. 内殻の開口部周縁に、同開口部の中心方向に突出する止着部を備えると共に、固定手段が、止着部を含む開口部の周囲部分を外側から覆うクランプディスクと、クランプディスクを止着部に固定するボルト及びナットを備えていることを特徴とする請求項３に記載の極低温流体用タンク。   The inner periphery of the opening of the inner shell is provided with a fastening portion that projects in the center direction of the opening, and the fixing means covers the peripheral portion of the opening including the fastening portion from the outside, and the clamp disc. 4. The cryogenic fluid tank according to claim 3, further comprising a bolt and a nut fixed to the attachment portion. クランプディスクが、複合材製であることを特徴とする請求項２又は３に記載の極低温流体用タンク。   The cryogenic fluid tank according to claim 2 or 3, wherein the clamp disk is made of a composite material.
JP2004191337A 2004-06-29 2004-06-29 Cryogenic fluid tank Expired - Lifetime JP4636491B2 (en)

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JP5729563B2 (en) 2009-10-30 2015-06-03 国立研究開発法人宇宙航空研究開発機構 Joining structure of metal member and composite material member

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04114890A (en) * 1990-08-30 1992-04-15 Mitsubishi Heavy Ind Ltd Heat-insulating member of extremely low temperature tank
JPH10332083A (en) * 1997-05-28 1998-12-15 Mitsubishi Chem Corp Pressure-resisting container
JP2004209499A (en) * 2002-12-27 2004-07-29 Showa Denko Kk Liner for gas cylinder and its production method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04114890A (en) * 1990-08-30 1992-04-15 Mitsubishi Heavy Ind Ltd Heat-insulating member of extremely low temperature tank
JPH10332083A (en) * 1997-05-28 1998-12-15 Mitsubishi Chem Corp Pressure-resisting container
JP2004209499A (en) * 2002-12-27 2004-07-29 Showa Denko Kk Liner for gas cylinder and its production method

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