Working principle of electromagnetic flowmeter

The principle of electromagnetic flowmeter is based on Faraday electromagnetic induction laws and regulations.When an electric conductor in the electromagnetic field of fitness movement, in the direction of the magnetic field, fitness movement in the direction of the opposite vertical direction of the electric conductor, will cause the induction electromotive force.The size of the electromotive force is proportional to the fitness rate of the electric conductor and the size of the magnetic induction compressive strength of the electromagnetic field.

Working principle of electromagnetic flowmeter

The key to the construction of the electromagnetic flowmeter consists of measuring conduit, electrical stage, housing, lining and converter.

Measuring tube: its function is to let the conductivity of the measured liquid based on.In order to make the magnetic induction line is separated or short-circuit fault according to the magnetic flux when measuring the catheter, the measuring catheter must be made of non-magnetic, low conductivity, low heat transfer rate and raw materials with a certain impact toughness, non-magnetic stainless steel plate, glass steel anticorrosion, high toughness plastic, aluminum, etc.

Electrical level: its function is to find the induction potential signal proportional to the measurement.Electrical level is generally made of non-magnetic stainless steel plate, and is stipulated to be flush with the lining, facilitate the fluid mechanics basis will not be blocked.It should be installed in the vertical position of the pipeline to avoid precipitation on the top of the measurement precision.

Housing: made of ferromagnetic material, it is the housing of electromagnetic coil of excitation regulator of distribution mechanism, and protect the influence of external electromagnetic field.

Lining: a detailed insulating lining is provided on the inner side of the measuring tube and on the flange protruding surface.It immediately touches the liquid under test. Its function is to improve the corrosion resistance of the measuring pipe and avoid the short-circuit fault of the inductive potential measured by the thickness of the wall of the pipe measured by the metal material.Lining raw materials are more corrosion - resistant, heat - resistant, wear - resistant polytetrafluoroethylene plastic, porcelain, etc.

Converter: the induced potential signal caused by liquid fluidity is very weak and is greatly damaged by various influencing factors. The effect of the converter is to make the induced potential signal larger and turn it into a unified standard signal and suppress the key influence signal.Its daily task is to convert the measured induction potential signal Ex warp into a uniform standard dc signal.

Shanghai porcelain xi instrument & meter co., ltd. was established in 2011, which is the beginning of porcelain xi's r&d and production of high-quality, high-precision flowmeters. We have introduced the Siemens CNC machining center system, cutting accuracy is higher than 0.001mm, the products have obtained the national multiple invention certification, the production strictly implements the ISO9001 certification.At the same time, we also provide customized instrument manufacturing solutions, with a strong r & d capabilities 3 to 4 weeks to high quality delivery.