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Introduction to the structure of Coriolis mass flowmeter - focus on microfluidic control technology

Coriolis mass flow meters are designed for use in light and heavy-duty vehicle dispensers, with higher flow rates and reduced fill times. Multiple transmitter options provide multiple variable outputs for any dispenser design Requires compact design, no moving parts, no special installation or flow regulation. Generally speaking, it is ideal for vertical pipelines flowing from bottom to top, but for Coriolis mass flowmeters, installed on vertical or horizontal pipes. Depending on the vibration condition of the pipeline and the application conditions, there are two parallel vibrating tubes inside the sensor, a driving coil is arranged in the middle, a pick-up coil is arranged on both sides, and an excitation voltage provided by the transmitter is applied to the driving coil, and the vibrating tube For reciprocating periodic vibrations, the fluid medium of the industrial process flows through the vibrating tube of the sensor, which produces a Coriolis effect on the vibrating tube.

The Coriolis mass flow meter is not easy to accumulate gas, and the flow sensor is small in size and light in weight. However, the high self-vibration frequency signal is not easy to detect. In order to make the self-vibration frequency not too high, the tube wall is often made thin and susceptible to wear and corrosion. The single-tube type meter does not split, the flow in the measuring tube is equal everywhere, it is good for the stable zero point, and it is also easy to clean, but it is susceptible to external vibration interference, only found in early products and some small-diameter instruments. Since the flow direction of the fluid on both sides of the U-shaped tube is opposite, the Coriolis forces acting on both sides of the U-shaped tube are equal in opposite directions, so that the U-shaped tube is subjected to a moment, and the tube end is twisted around the R-R axis. Torsional deformation is produced, the magnitude of which is determined in relation to the mass flow through the flow meter.

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