SU1340296A1 - Time-responsive flowmeter of conductive fluids - Google Patents

Abstract

The invention can be used to measure the flow rate in nuclear power plants with liquid heat transfer fluids. The purpose of the invention is to improve measurement accuracy, sensitivity, and decrease measurement time. Under the poles of the magnets 3, an electromotive force is induced, which is directed along the conduit 4. The presence of two pairs of electrodes 2 is necessary for the existence of paired longitudinal vortices, which rotate in opposite directions. In order to increase the amplitude of the useful signal, a shaper A of the sum of signals from electrodes 2 is used. Using the swirler 6, short discrete flow marks are created. 1 il. g k

Description

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Ieterpathy refers to the measurement of the flow rate of electrically conductive liquids and can be used to measure the flow rate in country power plants with liquid metal coolants.

The purpose of the invention is to improve the measurement accuracy, sensitivity and decrease the measurement time.

The drawing shows the proposed flow meter.

A conduit 1, on which pairs of electrodes 2 are installed, is placed between

the poles 3 of the magnetic system, so that 15 special swirlers 6 are created

The central section of the pipeline 1, in which the electrodes 2 are located along the generatrix, coincides with the symmetry plane of the poles 3 of the magnetic system. The electrodes are connected through the shaper A of the sum (or difference) to the device for measuring the time shift between the signals (correlator) 5. A swirler 6 can be installed in front of the sensors.

Works flow meter as follows.

When passing through the magnetic field of the sensors of vortex inhomogeneities of the longitudinal type, the axis of rotation of the accuracy

which are aligned with the longitudinal axis of the pipeline 1, under the poles of the magnets 3 electromotive forces are induced, directed along the axis of the pipeline. The voltage drop across the section between the electrodes 2 is a useful signal. The time between the signals of the first and second sensors is determined by

devices for measuring the time shift - 40 output of the sum forming unit or

ha between the signals 5. The two-digit setting of the signals associated with the input

a pair of electrodes at each of the poles of the time measurement device

The source of the magnetic field is proposed to shift between ;; the signals.

2

taking into account the possible existence of paired longitudinal nichrai (second measuring section, see drawing), rotating in opposite directions. In order to increase the amplitude of the useful signal, in this case, the shaper 4 uses the sum of the signals from the indicated pairs of electrodes 2. In the case of a single vortex, the polarity of the signal is changed from one of the pairs of electrodes.

The device can also work in the crawl mode, when using

short discrete flow marks (single longitudinal vortices).

Claims (1)

Invention Formula The time-of-passage flowmeter of electrically conducting liquids, containing in two measuring sections sources of a magnetic field applied to the pipeline with a pair of electrodes in each section and a device for measuring the time shift between signals, characterized in that that the signal pickup points are located along the magnetic poles forming the pipeline closest to the centers, and the device for measuring the time shift between the signals supplemented by a block forming the sum or difference of signals, and the electrodes through the input Editor T. Shagov Compiled by V. Shapagin Tehred A. Kravchuk Proofreader M. Maksimishinets Order 499 Circulation 545 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raupska nab., d. A / 5 Production and printing company, Uzhgorod, st. Design, And