What is a vortex flowmeter

The vortex flowmeter is based on Karman（The Karman vortex street principle is used to study and produce volumetric flow meters for measuring the volumetric flow rate, standard condition volumetric flow rate, or mass flow rate of gases, vapors, or liquids. Mainly used for flow measurement of industrial pipeline media fluids, such as gases, liquids, steam, and other media.

Its characteristics are small pressure loss, large range, high accuracy, and almost unaffected by parameters such as fluid density, pressure, temperature, viscosity, etc. when measuring volumetric flow rate under working conditions. No movable mechanical parts, therefore high reliability and low maintenance. The instrument parameters can remain stable for a long time. The vortex flowmeter adopts a piezoelectric stress sensor, which has high reliability and can be used in-Working within the temperature range of 20 ℃ to+250 ℃. It has both analog standard signals and digital pulse signal outputs, making it easy to use in conjunction with digital systems such as computers. It is a relatively advanced and ideal measuring instrument.

Vortex flowmeter, also known as vortex flowmeter or Karman vortex flowmeter[1] . Based on the comprehensive absorption of advanced technology from developed countries and years of research and production experience, carefully designed products have achieved intelligence, standardization, serialization, universality, mold production, and ensured the aesthetic quality of products. This product has the characteristics of advanced circuit, low power consumption, wide range ratio, simple structure, low resistance loss, sturdy and durable, wide application, long service life, stable operation, and easy installation and debugging.

INSTALLATION REQUIREMENTS

1. Reasonably choose the installation site and environment.

Avoid strong electrical equipment, high-frequency equipment, and strong power switch devices; Avoid the influence of high temperature heat sources and radiation sources, as well as places with strong vibrations and corrosion Environment and other factors should be taken into consideration, while also considering the convenience of installation and maintenance.

2. There must be sufficient straight pipe sections upstream and downstream.

If there are two upstream sensor installation points on the same planeFor a 90 ° elbow, the upstream straight pipe section is ≥ 25D, and the downstream straight pipe section is ≥ 5D.

If there are two upstream sensor installation points on different planesFor a 90 ° elbow, the upstream straight pipe section is ≥ 40D, and the downstream straight pipe section is ≥ 5D.

The regulating valve should be installed downstream of the sensorOutside of 5D, if it must be installed upstream of the sensor, the upstream straight pipe section of the sensor should not be less than 50D, and the downstream should not be less than 5D.

3. The piping upstream and downstream of the installation point should be concentric with the sensor, and the coaxial deviation should not be less than 0.5DN.

4. The pipeline adopts vibration reduction measures.

Sensors should be avoided as much as possible from being installed on pipelines with strong vibrations, especially lateral vibrations. If installation is necessary, vibration reduction measures must be taken upstream and downstream of the sensorInstall pipeline fastening devices at 2D locations and add anti vibration pads.

5. Installation on horizontal pipelines is the most commonly used installation method for flow sensors.

When measuring gas flow, if the measured gas contains a small amount of liquid, the sensor should be installed at a higher position in the pipeline.

When measuring liquid flow rate, if the measured liquid contains a small amount of gas, the sensor should be installed at a lower part of the pipeline.

6. Installation of sensors in vertical pipelines.

When measuring gas flow, the sensor can be installed on a vertical pipeline with no restrictions on the flow direction. If the tested gas contains a small amount of liquid, the gas flow should be from bottom to top.

When measuring liquid flow rate, the liquid flow direction should be from bottom to top: this will not add additional liquid weight to the probe.