Novel electrode liquid metal electromagnetic flowmeter

Abstract

A novel electrode liquid metal electromagnetic flowmeter comprises U-type structural leading pipes and electrodes. Each electrode assembly is composed of one U-type structural leading pipe and one electrode. A pair of electrode assemblies are symmetrically welded to a metal pipeline. The metal pipeline and the U-type structural leading pipes are welded and communicated and can be filled with a liquid metal medium. One end of each electrode is connected with a signal lead and the other end of each signal lead is connected with a signal processor. When the liquid metal medium flows through the metal pipeline, an inductive electric signal is generated in the radial direction of the metal pipeline, and the electric signal sequentially passes through the liquid metal medium in the U-type structural leading pipes and the electrodes and is transmitted to the signal processor through the signal leads. According to the novel electrode liquid metal electromagnetic flowmeter, the contact resistance of the electrodes and liquid metal is reduced, so that the accuracy and the precision of a measurement result are improved.

Description

technical field [0001] The invention relates to a liquid metal flow measuring device, in particular to an electromagnetic flow meter which can be applied to measure the liquid metal flow. Background technique [0002] Since the first domestic industrial application of electromagnetic flowmeter in the late 1950s, it has been rapidly used and developed in flow measurement in the 1970s and 1980s. The working principle of the electromagnetic flowmeter is based on Faraday's law of electromagnetic induction, that is, when the measured medium flows perpendicular to the direction of the magnetic force line, an induced electromotive force is generated in a direction perpendicular to the medium flow and the magnetic force line, and the induced electromotive force is related to the measured medium flow rate (average flow rate ), and then amplify and convert the output millivolt-level voltage signal proportional to the flow rate into a standard DC current and voltage signal output that ...

AI Technical Summary

Problems solved by technology

Although the electromagnetic flowmeter has the above-mentioned excellent characteristics, there are still some shortcomings, so that it is limited in use.

For example, when the electromagnetic flowmeter is used to measure the flow of liquid metal, there is a contact resistance between the pipeline and the measured medium; the contact resistance will affect the determination of the flowmeter output signal and calibration coefficient, thus affecting the accuracy and precision of the measurement results

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