Permanent-magnet small bore flowmeter

Abstract

The invention is a permanent magnetism small caliber flow meter, which includes a flow sensor, conversion monitor and power. The keys of the technology are: the straight pipe segment of the flow sensor measuring pipe is lined with a insulating cover, the permanent magnetisms are arranged in the concave slots along the external circle of the measuring pipe, there has a pair of compound conductor electrode at two side of the position vertical to the magnetic lines on the inner surface of the lined insulating cover in the straight pipe segment of the measuring pipe. A temperature sensor is attached onto one conductor electrode. It maintains the merits of the traditional electromagnetic flow meter that not apt to be blocked, no pressure loss, and it solves the problem that the circuit is complex, the cost is high, and apt to be affected by electromagnetic disturbance, the measurement is not precise.

Description

technical field [0001] The invention relates to an electromagnetic flowmeter for measuring the volumetric flow rate of a conductive liquid medium—a flowing conductor, in particular to a permanent magnet small-bore flowmeter suitable for measuring the flow rate of a flowing conductor in a pipeline with a nominal diameter below DN350mm and using permanent magnet excitation It can also be used for fluid carrying energy measurement. The device is mainly used in machinery, chemical industry, metallurgy, textile, papermaking, mining, heating, construction, environmental protection and other industries. Background technique [0002] At present, the commonly used electromagnetic flowmeter is mainly an instrument for measuring the volume flow of a flowing conductor made by using the principle of Faraday's law of electromagnetic induction. Such as figure 1 As shown, according to Faraday's law of electromagnetic induction, when the flowing conductor moves in the magnetic field to cut...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a permanent magnet small-caliber flowmeter, which not only maintains the advantages of the traditional electromagnetic flowmeter, which is not easy to block and has no pressure loss, but also solves the problems of complex circuits, high manufacturing costs, and susceptibility to electromagnetic interference. The problem of inaccurate measurement makes it have the advantages of compact structure, low manufacturing cost, effective improvement of anti-electromagnetic interference ability and service life, energy saving, volume flow measurement or mass flow measurement in one, and accurate and reliable measurement.

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