| 摘要 |
PURPOSE:To prevent the formation of water tap due to surface tension of water and to improve the accuracy in the measurement of the flow rate, by using a corner tap shaped orifice at a static pressure taking out part, and providing annular slits at the front and rear of a restricting part. CONSTITUTION:The corner tape shaped orifice 12 for measuring the flow rate is provided at a vapor pipe 1, wherein the vapor to be measured flows. The orifice 12 is constituted by the restricting part 2 which is formed at a right angle with the flowing direction of the vapor and the annular slits 10 which are formed at the front and read of said restricting part 2. Pressure taking out ports 9 are formed in annular chambers 11 which are formed at the outside of the slits 10. To the taking out ports 9, horizontal pressure guiding pipes 3a, reference head pipes 5a, and a pressure difference transducer 6 are connected, and the flow rate is measured by them. In this constitution, since the static pressure taking out area is made wide, the formation of the wafer tap due to the surface tension of the water can be prevented, and the accuracy in the measurement of the flow rate can be improved. |
