U形压强计测量流体输送管某两点压强差教学浅见

ABOUT THE COMMON VIEWS ON TEACHING THE MEASURING TO THE PRESSURE DIFFERENCE BETWEENCERTAIN TWO POINTS IN THE FLUID TRANSPORTING TUBE BY A U-TUBE PRESSUREGAUGE

本文从U形管压强计测量流体输送管某两点压强差,具有普遍性计算式的推导,找出设备压强定量描述式,从而得出真空度、表压两个基本概念及其与绝对压强的相互关系,避免常见化工教材仅用语言描述的弊端。

This eassy according to the rcckoning of the general formula from the measuring to the difference of the pressure between the two points in a fluid transporting tube, conclude out the describing formula of an apparatus' pressure in determined gu ality, then, result in the two elementary concepts of the vacuum gauge and the gauge pressure and again the relationship between the absolute pressure and the above two concepts, furthermore as to avoid the shortcoming appearing in common textbooks on chemimical industry only with the language discription.