论文部分内容阅读
25.使用隔离液的差压式流量计,灌隔离液操作步骤如何(以隔离液密度大于被测介质密度为例)? 答:(1)先停表并排去引压管线中和高低压室中可能存在的液体。即节流装置取压阀关闭,三阀组中的高低压阀关闭一只,平衡阀打开,两只排污阀开,并旋松正负压室上的排液阀。待残液排净后旋下隔离罐上的加液孔闷头和观察孔闷头并关死排污阀,打开高低压阀,关正负压室上的排液阀,开排气阀。 (2)从隔离罐加液孔加入隔离液,当差压计排气阀处有隔离液连续流出并且不夹带气体后,将排气阀关死。 (3)边加隔离液,边轻敲引压管,使引压管中的气泡迅速上升,直到隔离液从隔离罐中部的观察孔溢出为止。
25 using isolation liquid differential pressure flowmeter, irrigation liquid separation operation steps (with the isolation liquid density is greater than the measured medium density as an example)? A: (1) Possible liquid. That throttle device take off the valve closed, the three valve group of high and low pressure valve closed one, balance valve open, two sewage valve open, and loosen positive and negative pressure chamber on the drain valve. After the raffinate is discharged, unscrew the liquid filling hole on the isolation tank and the observation hole, and close the blowdown valve, open the high and low pressure valves, close the drain valve on the positive and negative pressure chambers, and open the exhaust valve. (2) Add spacer fluid from the addition hole in the isolation tank and shut off the vent valve when there is a continuous flow of barrier fluid at the vent valve of the differential pressure gauge and without entrained gas. (3) While adding a spacer, tap the pressure tube to rapidly raise the bubble in the pressure tube until the spacer overflows from the observation hole in the middle of the spacer.