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一、前言 众所周知,任何一种类型的低温液体贮运设备的支承结构是影响低温容器性能的主要因素之一,要求它不仅能够承载一定的重量(包括内容器,绝热材料和低温液体的重量)。而且要求通过它漏入低温液体的热流尽可能小,特别对于作为运输低温液体的贮槽,其支承构件还应承载一定的动载荷。这样,就要增加支承构件的强度,然而,这样会给低温液体带来较大的热流,从而增加低温液体的蒸发损失,这是不经济的。为此,我们设计了一种新的支承结构,这种结构应用在液氮运输贮槽中,经过例行试验证明是可行的。
I. Preface As we all know, any type of cryogenic liquid storage device supporting structure is one of the main factors affecting the performance of cryogenic containers, not only it can carry a certain weight (including the inner container, insulation materials and cryogenic liquid weight) . It is also required that the heat flow through it into the cryogenic liquid should be as small as possible, especially for tanks which serve as cryogenic liquids for transporting the supporting members to a certain dynamic load. In this case, the strength of the support member is increased. However, this may cause a large heat flow to the cryogenic liquid, thereby increasing the evaporation loss of the cryogenic liquid, which is uneconomical. To this end, we have devised a new support structure, which is used in liquid nitrogen transport storage tanks and has been proved feasible through routine tests.