本文叙述了液氦容器的设计特点,对三种不同型式的气体冷却屏进行了分析比较,提出了基于实验数据的低温容器颈管传热的简便计算方法,并以50立升液氦容器为实例,进行了高真空-多层气体屏绝热结构的热力计算。50立升的YH-50型液氦容器的实测日蒸发率为3.2、3.5%,与计算结果相符合。 In this paper, the design features of liquid helium vessel are described. Three different types of gas cooling screens are analyzed and compared. Based on the experimental data, a simple method to calculate the heat transfer of the neck of the cryogenic vessel is proposed. An example is given to calculate the thermal calculation of a high-vacuum-multilayer gas-barrier thermal insulation structure. The measured daily evaporation rate of 50 liters YH-50 liquid helium container was 3.2 and 3.5%, which was in good agreement with the calculated results.