SU1610281A1 - Device for measuring mass flow rate of liquid - Google Patents

Abstract

The invention relates to a flow meter and allows to improve the accuracy of measuring the flow rate of a pulsating fluid flow. The fluid flow enters storage tank 2, from where the fluid flows freely through a vertical pipeline 3 with a streamlined body 4 installed. The output signals of the level 5 sensor installed in the storage tank and the transducer 7 of the hydrodynamic force acting on the streamlined body 4 are amplified and integrated and arrive at the inputs of the computing unit 12 and the divider 13. At the output of the divider 13, a signal is generated that is proportional to the mass flow rate of the fluid. 1 il.

Description

one

(21) 4167956 / 24-10

(22) 12/25/86

(46) 11/30/90. Butt. ff 44

(71) Kirovograd Institute of Agricultural Engineering

(72) G.R.Nosov and K.V.Kondratets

(53) 681.121 (088.8)

(56) USSR Copyright Certificate No. 480908, cl. G 01 F 1/72, 1970. Japanese Application No. 60-32807, cl. G 01 F 1/28, 1985.

(54) DEVICE FOR MEASURING MASS FLUID FLOW

(57) The invention relates to flow rates and improves the accuracy

measuring the flow rate of the pulsating fluid flow. The fluid flow enters the storage tank 2, from where the fluid flows freely through the vertical pipe 3 with the streamlined body 4 installed therein. The output signals of the level 5 sensor installed in the storage tank and the hydrodynamic force transducer 7 acting on the streamlined body 4 are amplified and integrated and arrive at the inputs of the computing unit 12 and the divider 13. At the output of the divider 13, a signal is generated that is proportional to the mass flow rate of the fluid. 1 or „

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OP

The invention relates to measuring instrumentation, in particular to methods for determining the mass flow of liquids, and can be used to measure the flow rate of water,

. The purpose of the invention is to improve the measurement accuracy.

The drawing shows a flow diagram of a device for measuring flow.

The device contains a pipeline 1 with a pulsating flow of liquid, the density and gas content of which change, a storage tank 2, 5 pipe 3 in which a streamlined body 4 is installed. A sensing element 5 of the level sensor is mounted in the storage tank. In addition, the device includes JQ Vatapi 6 and 7 converters, amplifiers 8 and 9, integrators 10 and 11, supra-12, divider 13, and recording unit 14.

The device works as follows .25

From the pipeline 1 pulsating flux; liquids with varying density; by the force of gravity pushes through the pipe 3. The streamlined body 4 perceives the hydrodynamic force from the flow, which is converted by the converter into an electrical signal amplified by amplifier 9. The signal proportional to hydrodynamic flow force, averaged by the integrator 11 and fed to one of the inputs of the divider 13. At the same time, the liquid level in the storage tank 2 is measured by the sensing element 5 and the converter 6, the signal This is amplified by amplifier 8 and averaged by integrator 10. A signal that is proportional to

the fluid level is processed by the computing unit 12, which extracts the square root from it. Since the input of the divider 13 simultaneously receives two signals - from the integrator 1 1 and the computing unit 12.50 and the gain in the channel of the elements 4, 7,

9, 11 is chosen with regard to K, then on

35

5 Q

five

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The output of the divider 13 is formed by otHo, - the KQ XRTF, i.e. signal proportional to mass flow rate. This signal captures the recording unit 14,

During operation, the fluid flow varies, resulting in a variation in the level of H and the velocity V in the system. The pulsating flow of fluid into the accumulative capacitance also leads to the pulsations of the H level, and, consequently, of the velocity V, and the phase nature of the pulsations of these parameters is the same. In view of this, the phases of the averaged characteristics of the two signals will absolutely exactly coincide only at the same constant times of the integrating circuits. Maximum measurement accuracy can be obtained with the unambiguous determination of the mean values of F and H at a given time. .

The device makes it possible to increase the accuracy of determining the mass flow rate of liquids under the conditions of a pulse of 1 inch, a change in the density, and a gas content of the measured medium.

Claims (1)

Formula A device for measuring the mass flow rate of a fluid, which is installed in a heat flow pipeline and connected to a transducer of hydrodynamic force, is designed so that, in order to improve the accuracy of measuring pulsating flows, the pipeline is installed vertically and connected in the upper part to the accumulative a container with a sensitive element of the level sensor placed in it, the flow body is installed in the lower part of the pipeline, with the transducer of hydrodynamic force through the first amplifier and the transducer The second integrator is connected to one of the inputs; the master is connected; the level sensor is through the second amplifier; the second integrator and the computing unit are connected to another input of the divider, the output of which is connected to the recorder.