Induction type liquid metal electromagnetic flowmeter

Abstract

The invention discloses an induction type liquid metal electromagnetic flowmeter which comprises a circular flow channel, a heat insulation layer, excitation coils, an excitation power supply, an induction signal pickup coil, a signal processing module and a shielding layer. The two excitation coils are located at the two ends of the electromagnetic flow meter, the winding directions of the coilsare opposite, the number of turns is the same, power is supplied by the excitation power source, the excitation power source can generate high-frequency alternating-current electric signals, and the two excitation coils generate magnetic induction intensity in the flow channel in the opposite directions and the same size. When the liquid metal does not flow, induced magnetic fields generated by the two sets of magnet exciting coils counteract each other. When liquid metal flows, a magnetic field at the position of the induction signal pickup coil can be changed, then alternating induced voltage in direct proportion to the flow of the liquid metal is generated in the induction signal pickup coil, and a flow signal is obtained through the signal processing module. The induction type liquid metal electromagnetic flowmeter is suitable for measuring the flow of liquid metal, such as sodium, lithium, lead-bismuth alloy, sodium-potassium alloy and the like.

Description

technical field [0001] The invention relates to the field of liquid metal measuring equipment, in particular to an inductive liquid metal electromagnetic flowmeter. Background technique [0002] With the development of fourth-generation nuclear reactor and space reactor technology, more and more researches and applications have been made on liquid metal as coolant reactors, such as lead-bismuth fast reactors, sodium-cooled fast reactors, and sodium-potassium alloys as coolants. Heap of space. The experimental research on the thermal hydraulic characteristics of liquid metals at home and abroad is also developing in the direction of large-scale and extreme working conditions. These development trends put forward higher requirements for the measurement of liquid metal flow, requiring a wider range of measurable flow rates and high temperature resistance. higher. However, the existing permanent magnet electromagnetic flowmeter uses permanent magnets as the excitation componen...

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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