The structure of DCFL3000A series electromagnetic flow meter

Electromagnetic flow meters are used to measure the flow of conductive media. They are widely used in chemical industry, chemical fiber, papermaking, mining and metallurgy, urban water supply and drainage, environmental protection, water conservancy, steel, petroleum, pharmaceuticals and other industrial fields. It can measure various acids, alkalis, and salts. Solution, production water, lime milk, sewage and various slurries. 

The DCFL3000A series electromagnetic flow meter is an intelligent flow meter with high performance and high reliability. It adopts mature technology, applies high-quality materials, breaks through technical difficulties, and improves product performance indicators. The maximum measurement range can reach DN2200, which can provide customers with Safe and reliable solution.

The structure of the flow meter

The structure of the electromagnetic flow meter is mainly composed of sensors and converters. The sensors include measuring catheters, coils, electrodes, shells, linings, etc.

1 measuring catheter

The function of the conduit is to let the measured conductive liquid pass through.

The conduit must be made of non-magnetic materials, such as stainless steel, ceramic, plastic, etc.

Catheter is the flow path of the medium

The pipe bears the rated working pressure

2 coil and magnetic circuit

In order to generate the induced electromotive force, a magnetic field is required, and the coil and the magnetic circuit are mainly used to generate the magnetic field.

When the temperature is different, the temperature resistance grade of the enameled wire of the coil is also different. When the highest temperature is lower than 120℃, it is E-level, if the highest temperature is 180℃, it is H-level. At the same time, note that the lining material should also be compatible with the temperature.。

3 electrodes

Its function is to draw out the induced electric potential signal proportional to the measurement. Electrodes are generally made of non-magnetic stainless steel and are required to be flush with the lining so that the passage of fluid is not obstructed. Its installation position should be in the vertical direction of the pipeline to prevent sediment from accumulating on it and affecting the measurement accuracy.

4 lining

On the inner side of the measuring pipe and the flange sealing surface, there is a complete electrical insulating lining. It directly contacts the liquid to be measured, and its function is to increase the corrosion resistance of the measuring tube and prevent the induced potential from being short-circuited by the metal measuring tube wall. The lining materials are mostly corrosion-resistant, high-temperature, and wear-resistant polytetrafluoroethylene plastics, ceramics, etc.

5.Shell and side ring

It is made of ferromagnetic material and is the outer cover of the excitation coil of the distribution system, and isolates the interference of the external magnetic field.

The shell and side ring are used to protect the coil and electrodes from the environment.

The shell and side ring are used to shield the external magnetic field.

Some calibers and models of housing are part of the magnetic circuit.

6 converter

The induced potential signal generated by the liquid flow is very weak and is greatly affected by various interference factors. The function of the converter is to amplify and convert the induced potential signal into a unified standard signal and suppress the main interference signal. Its task is to amplify and convert the induced potential signal Ex detected by the electrode into a unified standard DC signal.

Converter components: power supply circuit, host circuit, front circuit, display circuit, I/O output current, excitation current circuit, communication interface circuit, etc.