To provide a cryogenic tank which can store cryogenic fluid therein and reduce stress generated by a difference between linear expansion coefficients and a pressure to a permissible value or lower in a temperature range from a normal temperature to a cryogenic temperature and a predetermined pressure range, and to provide a manufacturing method of the cryogenic tank.SOLUTION: A cryogenic tank includes: a hollow liner for storing cryogenic fluid L therein; a mouth piece integrated with the liner and having a passage for loading or discharging the cryogenic fluid; an outer shell which restricts expansion of the liner; and a mold release processing material which is provided on an outer surface of the liner or an inner surface of the outer shell and prevents adhesion between the outer surface and the inner surface. The liner is formed of a resin which does not break by the time when the liner contacts with the outer shell in a pressure loading state when the cryogenic fluid is stored therein. The mouth piece is formed of a resin, a fiber-reinforced plastic, or a metal which has corrosion resistance to the cryogenic fluid and withstands a heat load during liner molding. The outer shell is formed of a fiber-reinforced plastic whose molding temperature is lower than a melting start temperature of the liner.SELECTED DRAWING: Figure 1
【課題】常温から極低温までの温度範囲、及び所定の圧力範囲において、極低温流体を内部に貯留することができ、かつ線膨張係数の差及び圧力による発生応力を許容値以下に抑えることができる極低温タンクとその製造方法を提供する。【解決手段】内部に極低温流体Lを貯留するための中空のライナと、ライナに一体化され極低温流体を充填又は排出する流路を有する口金と、ライナの膨張を制限する外殻と、ライナの外面又は外殻の内面に設けられ両者の接着を防ぐ離型処理材とを備える。ライナは、極低温流体を貯蔵時の圧力負荷状態において外殻と接するまでに破断しない樹脂からなる。口金は、極低温流体に対する耐食性およびライナ成形時の熱負荷に耐える樹脂、繊維強化プラスチック、又は金属からなる。外殻は、成形温度がライナの溶融開始温度より低い繊維強化プラスチックからなる。【選択図】図1
CRYOGENIC TANK AND MANUFACTURING METHOD OF THE SAME
極低温タンクとその製造方法
2023-07-27
Patent
Electronic Resource
Japanese
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