隔离液液位计的研制及其使用

原油储罐所用的老式液位计是使被测介质（原油）直接进入液位计内，由于原油易凝，常粘堵在液位计上，使液位计显示液位不准确，甚至无法工作，针对这种情况研究制出一种新型液位计－隔离液液位计，特点是把被测介质与进入液位计的显示介质彻底分开，显示介质选用粘底，不凝，不堵的液体，间接，准确，直观地将被测介液位显示出来。新型液一计与其它直显式液位计相比，增设了进液阀，加液漏斗，排液阀，进行气管和一个耐磨，耐腐蚀，

Development and Application of the Spacer Fluid Level Indicator.

The conventional level indicators used in oil storage tanks, indicating the level with the measurant (crude oil) directly flowing into the indicator, are unreliable or even inoperative because it is subject to the adhesion of the viscous oil. To counter this problem,a new level indicator,spacer fluid level indicator,is developed. By thoroughly separating the measurant from the inviscid indicating liquid in the level indicator, it can indicate the oil level indirectly, precisely and visually. In addition to the components common to other types of level indicators, the new instrument is also equipped with the following elements:liquid inlet valve, filling funnel,drainage valve,air inlet pipe and an antifriction,corrosion-resistent and flexible spacer fluid bag (holding spacer fluid,i. e. indicating liquid). Under normal condition,the pressure applied to any point of spacer fluid bag from the oil should be equal to the pressure of the spacer fluid in accordance with the principle of level equilibrium, thus the oil level can be measured. The spacer fluid level indicatior has been in preliminary but sound operation for nearly one year,and has an error range of less than 1% comparing with the dipping rod.