CORRELATION METHOD FOR DETERMINING THE FLOW RATE OF LIQUID METAL AND ELECTRODELESS ELECTROMAGNETIC FLOWMETER OF LIQUID METAL "PIF" (PERM INDUCTION FLOWMETER) FOR ITS IMPLEMENTATION Russian patent published in 2023 - IPC G01F1/58 

FIELD: instrumentation.

SUBSTANCE: invention relates to instrumentation, in particular, to the field of flow measurement by the electromagnetic method, and can be used to measure the flow of liquid metals, including in nuclear power plants. A correlation method is proposed for determining the flow rate of liquid metal, which consists in registering magnetic field fluctuations in two measuring sections located at a known distance from each other, and measuring the time of flight of fluctuations in these measuring sections, which is used to judge the flow rate of liquid metal. With the help of inductors of a variable rotating field, made with the possibility of their inclusion both co-directionally and oppositely, in a continuous or pulsed mode, perturbations of the velocity field are generated in a plane orthogonal to the direction of the main flow, and with the help of inductors of a constant magnetic field, supplemented by measuring coils, register fluctuations of the magnetic field caused by these perturbations. To implement the above method, an electrodeless liquid metal electromagnetic flowmeter is proposed, consisting of induction coils and a magnetic circuit, and the device contains four inductors, each of which is a stacked six-section magnetic circuit, each section of which has a rectangular rod directed towards the geometric center of the magnetic circuit, with a on it with an induction coil, two of the four inductors form a generating module, the other two inductors are supplemented with measuring coils connected to the measuring device and form a recording module, all inductors are mounted on a frame consisting of studs and three-section cheeks, and the generating inductors are made with the possibility of their switching on both co-directionally and oppositely directed, in continuous or pulsed mode.

EFFECT: invention provides the possibility of installation on a pipeline as part of an industrial circuit (separability), expansion of the ranges of the permissible temperature of the measured medium and the permissible diameter of the pipe, eliminating the need for calibration.

2 cl, 5 dwg