水压试验是压力容器检验的基本项目,压力容器一般都要经过试压程序。容积小的容器升压很快,不到1min就达到试验压力,有时因试压泵停止不及时而致超压;容积很大的容器升压很慢。压力爬升以小时计,使人对试压系统是否正常产生怀疑。因此,对升压时间事先有个估计是有好处的。 “升压时间”是试压系统升高压力所需的“进水量”除以试压泵的“排量”之商。进水量取决于受试容器壳体的容积膨胀和试压介质的体积压缩或收缩(压缩“指介质因压力升高而致体积缩小,”收缩“指介质因散热降温而致体积缩小)。下面讨论钢制圆筒形和球形容器的试压进水量。做一些工程上可以接受的简化:只计算壳体本身的容积变化(略去附件和试压管道的容积变化);圆筒形容器顶盖(封头)的 Hydraulic pressure test is the basic project of pressure vessel inspection, pressure vessels generally have to go through the pressure test procedure. The volume of a small container boost quickly, less than 1min to reach the test pressure, and sometimes due to the pressure test pump stop over time caused by overpressure; volume of a very slow container boost. Pressure climbs in hours, making people doubt the normal pressure test system. Therefore, it is beneficial to have a prior estimate of boost time. ”Boost Time “ is the quotient of ”Intake“ divided by the ”Displacement" of the pressure test pump required by the pressure test system to increase the pressure. The amount of water inflow depends on the volume expansion of the shell of the container under test and the compression or contraction of the volume of the pressure medium (compression), which means that the volume of the media shrinks due to the pressure increase and the contraction of the media shrinks due to cooling The following is a discussion of the test pressure inflow for steel cylindrical and spherical vessels: Some engineering simplifications are acceptable: only the change in the volume of the casing itself (the volume of the attachment and the pressure test tube is omitted); the cylinder Shaped container head (head)