Flowmeter sensor based on electromagnetic correlation method

Abstract

The invention discloses a flowmeter sensor based on an electromagnetic correlation method. According to the technical scheme provided by the invention, the flowmeter sensor comprises two pairs of measurement electrode assemblies, a pair of excitation structure assemblies, a pair of holed fixing frame plates and an excitation structure mounting device; each measurement electrode assembly comprises a detection electrode, an insulating sleeve, a spacer and a nut, the two pairs of detection electrodes are not arranged on a same radial section of a measurement tube, but arranged on a same axial section of the measurement tube and are a certain distance apart; and each excitation structure assembly consists of an excitation coil, an excitation coil clamping slot and a magnetic core, and the axial length of each excitation structure assembly on the measurement tube is larger than the radial length of each excitation structure assembly on the measurement tube so that the two pairs of detection electrodes are arranged in a magnetic field generated by the excitation structure assemblies. The flowmeter sensor disclosed by the invention has the advantages of simple process, capability of continuous measurement, low manufacturing cost, small volume, light weight, wide flow rate measurement range and high measurement accuracy and can measuring the flow a two-phase flow or a multi-phase flow on line.

Description

technical field [0001] The invention relates to a sensor, in particular to an electromagnetic correlation method flowmeter sensor for measuring two-phase flow or multi-phase flow containing non-conductive substances. Background technique [0002] Electromagnetic flowmeter measurement has the following advantages. It is not affected by external factors such as temperature and pressure, nor is it affected by the characteristics of the fluid itself such as fluid density and viscosity; because its interior is smooth and has no flow-blocking elements, it does not generate resistance to the fluid, so it does not There will be pressure loss, so it is widely used in the measurement of flow rate and flow production. In recent years, electromagnetic flowmeters have begun to be used in the measurement of two-phase flow and multi-phase flow, especially in the injection profile logging of water injection wells and polymer injection wells in oil fields with high water cut. Judging from t...

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Problems solved by technology

Judging from the current application of traditional electromagnetic flowmeters, when electromagnetic flowmeters measure oil-water two-phase flow with high water content, due to the low content of non-conductive substances (oil phase in oil-water two-phase flow), the influence on the measurement results is small. The measurement results are relatively accurate; when the electromagnetic flowmeter measures non-high water content oil-water two-phase flow, due to its high content of non-conductive substances, it has a great influence on the measurement results, and the measurement results have large errors

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