根据对历年来压力表的使用情况和损坏原因的分析，我们现在可以确认，造成压力表损坏的最根本的原因是由于泥浆泵憋泵而引起的。只要能做到既把憋泵时的升高的压力（超过额定值的部份）排除在压力表的承受能力之外，又不使压力表的量度失真，就不会造成使压力表频繁损坏。为此，我们制作了压力表安全接头，其结构如附图所示。它由上体（1）、下体 Based on the analysis of the use of pressure gauges and the causes of damage over the years, we can now confirm that the most fundamental cause of damage to the pressure gauge is caused by the mud pump pump. As long as it is possible to exclude the elevated pressure (above the rated value) of the pump while it is out of the pressure gauge, without distorting the pressure gauge, it will not cause frequent damage to the pressure gauge. . For this purpose, we have made pressure gauge safety joints, the structure of which is shown in the drawing. It consists of upper body (1), lower body