An inductive liquid metal electromagnetic flowmeter

Abstract

The invention discloses an induction liquid metal electromagnetic flowmeter, which comprises a circular flow channel, a heat insulation layer, an excitation coil, an excitation power supply, an induction signal pickup coil, a signal processing module and a shielding layer. The two sets of excitation coils are located at both ends of the electromagnetic flowmeter. The winding directions of the coils are opposite and the number of turns is the same. They are powered by the excitation power supply. The excitation power supply can generate high-frequency alternating current signals. The two sets of excitation coils generate opposite directions in the flow channel and have the same size. The magnetic induction intensity; when the liquid metal does not flow, the induced magnetic fields generated by the two sets of excitation coils cancel each other out, and when the liquid metal flows, it will cause the magnetic field at the position of the induction signal pick-up coil to change, and then in the induction signal pick-up coil. The alternating induced voltage proportional to the flow of liquid metal is used to obtain the flow signal through the signal processing module. The inductive liquid metal electromagnetic flowmeter of the present invention is suitable for measuring the flow of liquid metals, such as sodium, lithium, lead-bismuth alloy, sodium-potassium alloy, and the like.

Description

Technical field[0001]The present invention relates to the field of liquid metal metering equipment, and in particular, an inductive liquid metal electromagnetic flowmeter.Background technique[0002]With the development of the fourth-generation nuclear reactor and spatial heap technology, liquid metals is used as a coolant to obtain increasing research and application, such as lead bismuth fast pile, sodium cold pile, with sodium potassium alloy as coolant. Space stack. Experimental study on the thermal characteristics of liquid metal at home and abroad also developed towards large, extreme working conditions, and these development trends have put forward higher requirements for the measurement of liquid metal flow, requiring measuring flow rates, temperature resistance higher. The existing permanent magnet electromagnetic flowmeter uses a permanent magnet as an exciting member, which is limited, and the large-scale test device requires a large size, high weight permanent magnet, whic...

AI Technical Summary

Problems solved by technology

However, the existing permanent magnet electromagnetic flowmeter uses permanent magnets as the excitation components, and its temperature resistance is limited, and for large-scale test devices, it is necessary to process large-size, high-weight permanent magnets, which greatly limits the convenience and reliability of its use. economy

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