Electromagnetic flow transducer

Abstract

The invention belongs to the field of electromagnetic flow measurement, and specifically relates to an electromagnetic flow transducer. The electromagnetic flow transducer comprises a measuring pipeline (10) prepared by non-magnetic metal, an embedded measuring assembly (20) prepared by an insulating material is fixedly arranged in the measuring pipeline (10) by means of a sealing part, the embedded measuring assembly (20) is provided with a fluid passage (24) for fluid to flow through, a pair of inductive electrodes (21) and an excitation structure member (22) are arranged around the fluid passage (24), and the length of the embedded measuring assembly (20) is shorter than that of the measuring pipeline (10). The electromagnetic flow transducer is simple in structure, the distance between two pole pieces of the excitation structure member can be reduced, and therefore power consumption can be reduced; the non-magnetic metal pipeline is high in intensity and has a good magnetic shielding effect, the electromagnetic flowmeter is simplified, and the cost is reduced; the area of exposed metal in the pipeline is increased as much as possible, the exposed metal is directly contacted with measuring fluid, and has a grounding electrode effect, and interference is eliminated, and the safety factor of the electromagnetic flowmeter is increased.

Description

technical field [0001] The invention belongs to the field of flow measurement, and in particular relates to an electromagnetic flow sensor. Background technique [0002] Electromagnetic Flowmeter (Electromagnetic Flowmeter) is a measuring instrument used to measure the volume flow of conductive liquids, such as electrolyte liquids, liquid metals, etc., according to Faraday's law of electromagnetic induction. The most critical element is the electromagnetic sensor. The design principle of the electromagnetic sensor is to apply a magnetic field on both sides of the measuring pipe. Induced electromotive force, the magnitude of the induced electromotive force is proportional to the fluid flow rate, and the fluid flow rate can be obtained by integrating time. [0003] Most of the electromagnetic flow sensors currently on the market use coil excitation. For example, the electromagnetic flow sensors disclosed in CN102538882A and CN202177405U all have two excitation coils outside t...

AI Technical Summary

Problems solved by technology

In this patent, the two ends of the metal pipe are formed as protrusions, so as to maximize the area of ​​exposed metal and prevent the electromotive force on the induction electrode from leaking to the exposed metal part, but this structure will inevitably increase the difficulty of casting the metal pipe ,like Image 6 shown

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