Experience Exchange of Domestic Mass Flow Meters

Experience exchange on the use of domestic mass flowmeters Domestic mass flowmeters are electromagnetically driven mechanical vibration flow measuring instruments, and the materials that make up the measuring tubes of domestic mass flowmeters will be affected by the pressure and temperature of the process medium. The flow measuring tube (also known as the flow vibrating tube) installed in the pipeline will be affected by the mechanical vibration, mechanical stress, mechanical torsion, etc. of the factory pipeline on the measurement. In addition, the error characteristics shown by the domestic mass flowmeter itself are presented“Trumpet”, instead of presenting a flat straight line with different flows. With the continuous acceleration of industrial development, the requirements for flowmeters are getting higher and higher. The domestic mass flowmeter is a high-standard mass flowmeter, which can measure the mass, temperature and density of the fluid, and can also calculate the volume of the flow. In the process of practical application, the accuracy of domestic mass flowmeters is required to be the highest. Therefore, in the practical process, the accuracy of mass flow must be improved. Let's start with the principle of domestic mass flowmeter. There are many brands of domestic mass flowmeters with different shapes, but their internal structures are basically the same in terms of measurement principles, and they are all manufactured based on the principle of Coriolis mass flowmeters. The internal structure is mainly divided into two parts: the measuring tube and the detecting element: the measuring tube is two bent pipes with the same diameter direction, and the fluid flows through the bent pipe; the detecting element mainly includes three coils (one driving coil, two detecting coils) And a temperature sensor, distributed between the two measuring tubes. The driving coil generates a periodic mechanical vibration to the two measuring tubes through electromagnetic oscillation, and the two detecting coils respectively detect the vibration amplitude and period of the measuring tubes. Since the vibration of the measuring tube is affected by the weight of the liquid in the measuring tube, the mass of the liquid in the measuring tube can be obtained by measuring the change of the vibration of the measuring tube, so that the instantaneous mass flow rate and density of the medium flowing through the domestic mass flowmeter can be obtained.

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