METHOD AND DEVICE FOR MEASURING FLOW AND QUANTITY OF LIQUIDS AND GASES USING REDUCING DEVICES Russian patent published in 2022 - IPC G01F1/42 

FIELD: flow rate accounting measurement.

SUBSTANCE: invention is intended to provide measurement and accounting of the flow rate and quantity of liquid and gaseous media, supply and consumption of thermal energy and coolant, gas, steam, water and other similar media and expand the range of measured flow rates in a wide range of measured media densities. In the method for measuring the flow rate and the amount of liquids and gases, the calibration function of the dependence of the identification parametric coefficient on the volumetric flow rate for the reference volumetric flow meter and the pressure drop across the restrictive device is preliminarily determined for the constriction device by calibrating (verifying) the constriction device with a volumetric exemplary flow meter for each point of the normalized range volume flow and pressure drop across the narrowing device from the minimum to the maximum range of the measured flow rate at a known, constant and controlled density of the working medium, and the measurements of the flow rate and the amount of liquids and gases are carried out with the simultaneous determination of the density of each normalized volume unit of the measured working medium, and the mass flow rate of each normalized volume unit of the measured working medium is determined taking into account the readings of a volume flow meter installed in series with a narrowing device on one measuring line, measuring volume and volume flow, which are read by the controller, which determines the identification coefficient of the narrowing device at each point of volume flow using a pre-calibrated restrictive device using the calibration function, and determines the density and mass flow rate of each normalized unit of volume from the pressure drop and volume flow. In addition, the volume flow meter is assembled in the body of the constriction device.

EFFECT: reduction of the relative error in measuring the flow rate and the amount of the medium due to a more accurate determination of the identification parametric coefficient of the narrowing device, determining the density of each normalized unit of volume, expanding the range of measured flow rates in terms of density.

3 cl, 5 dwg