论文部分内容阅读
本文介绍我们研制的 SR—2、SR—2(A)及 SR—3三种实验用金属杜瓦容器。其内胆形状各异,公称容积分别为22升、12升和13升。容积采用高真空多屏绝热,内胆通过管颈悬吊,这大大提高了绝热效果。液氮的日蒸发率分别小于0.5、0.72与0.88升/日。SR—2的液氮日蒸发率小于4.2升/日,容器夹层抽空密封采用低熔点合金阀,抽空容易、密封可靠,经七年使用,未发现漏气现象。
This article describes the three metal Dewar containers we developed for SR-2, SR-2 (A) and SR-3. The liner shape varies, the nominal volume was 22 liters, 12 liters and 13 liters. The volume of high-vacuum multi-screen insulation, liner hanging through the neck, which greatly improves the insulation effect. The daily evaporation rates of liquid nitrogen were less than 0.5, 0.72 and 0.88 liters / day, respectively. SR-2 liquid nitrogen evaporation rate of less than 4.2 liters / day, the vessel interlayer vacuum seal alloy valve with low melting point, easy to evacuate, sealed and reliable, after seven years of use, found no leakage.