The application of electromagnetic flowmeter in industry and the advantages and disadvantages
The working principle of electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. In the electromagnetic flow meter for measuring the closed pipeline conductive medium (liquid or liquid) is conducting metal rods in the Faraday experiment, upper and lower segment of two electromagnetic coil produces a constant magnetic field. When a conductive medium flows through, can produce induced voltage. The inside of the tube induced voltage produced two electrodes are measured. Measuring pipeline through non-conductive lining (such as ptfe, fluorine ethylene, fep, chloroprene rubber, polyurethane, etc.) with fluid and measuring electrode electromagnetic isolation. The diagram below:
Working principle of the electromagnetic flowmeter
The structure of the electromagnetic flowmeter is mainly composed of magnetic circuit system, measure the catheter, electrode, shell, lining and converter part, is composed of sensors and switches. Is divided into a shape and separation type, the function of electromagnetic flow meter on the market difference is bigger, the simple is measuring the one-way traffic, only output signal and power supply cut off the display and alarm, cut of small signal, flow volume, automatic check and fault self-diagnosis, communicate with PC and motion configuration, etc.
Electromagnetic flowmeter with dc excitation electromagnetic flowmeter, alternating excitation electromagnetic flowmeter and battery power supply of electromagnetic flowmeter. SIKE measurement and control technology co., LTD. Dc excitation electromagnetic flowmeter can cover almost all industrial applications of all kinds of ordinary occasions, specifications diversity makes can meet the needs of all kinds of different usage and measurement; Alternating excitation electromagnetic flowmeter (also called serous type electromagnetic flowmeter) is driven by a high power pulsed alternating field current sensor coil, the magnetic field strength higher than that of the conventional dc pulse excitation electromagnetic flow meter, can be competent for containing solid particles, and a high concentration of slurry measurement, such as slurry, cement, pulp in paper making, etc.; Electromagnetic power electromagnetic meter flow meter is a perfect, suitable for power meter, inconvenient situations such as at the regional water supply, charge measurement and irrigation, etc.
Electromagnetic flowmeter has a series of excellent features, can solve the problem of other flow meter is not easy to apply, such as dirt flow, corrosion flow measurement. On the actual electromagnetic flowmeter and s has major breakthrough in technology, with the development of industry application is very extensive.
Advantage: the measuring channel is smooth and straight, not blocked, suitable for measuring the solid-liquid two-phase fluid containing solid particles; Insist on not flow caused by pressure loss, energy saving effect is good; Is not subject to measure the fluid density, viscosity, temperature and pressure, and the influence of the conductivity changes; Flow range is big, wide diameter range; Can be used corrosion fluid.
Disadvantages: not measuring liquid conductivity is low, products such as oil, water softener, etc; Not measuring gas, steam and liquid containing larger drum; Cannot be used in larger temperature.
Electromagnetic flowmeter is applied widely in industry, large diameter instrument is more applied in the drainage engineering; Small caliber is often used in high demand or dangerous situations, such as iron and steel industry blast furnace tuyere cooling water control, papermaking industry measure paper slurry and the black liquor, strong corrosive liquid, chemical industry non-ferrous metallurgical industry of the pulp; Small diameter, small diameter is often used in the pharmaceutical industry, food industry, biochemistry and places of hygienic requirements.