江汉地区冬季气温低时,敞露在野外的注水井口,在压力表至流水管线之间的部分死水,容易结冰,由此蹩坏压力表波登管从而使压力表报废的事故常常发生。1974年,我们曾在压力表引线中加酒精、甘油等低凝固点物质来降低水的凝固点。由于加注麻烦,保留时间又很短,因此没有得到推广。1975年,我们经过多方研究,制作了16个压力表防冻 Jianghan region in winter when the temperature is low, exposed in the wild water injection wellhead, part of the pressure gauge to the pipeline between the backwater, easy to icy, which bad gauge Bourdon tube so that the pressure gauge scrapped accidents often occur. In 1974, we used low pressure solidifying points, such as alcohol and glycerol, to lower the freezing point of water in the pressure gauge lead. There was no promotion because of the annoying raise and the short retention time. In 1975, after many studies, we produced 16 pressure gauges antifreeze