First of all, the steam flow meter-vortex type is based on the Karman vortex principle. When the gas encounters the vortex generating body triangular prism, a Karman vortex will be generated. It is recorded by the vortex piezoelectric ceramic probe and converted into a frequency signal. After processing by the signal board, it can Calculate the flow value. At present, the most widely used ones are the measurement of saturated steam and superheated steam. Of course, it can also be used to measure the flow rate of ordinary gases and liquids. Its main advantages are: small pressure loss, easy installation and use, and relatively accurate measurement.
This instrument is mainly used to measure steam flow. This instrument effectively meets the needs of on-site measurement. Vortex flow meters require temperature and pressure to measure steam, because steam temperature and pressure may change at any time. Only by measuring accurate temperature and pressure can the density value of steam be accurately calculated, making the calculated mass flow rate more accurate. Temperature and pressure compensation are generally divided into integrated compensation and split compensation. The advantages of integration are easy installation and beautiful appearance. Because the integrated temperature and pressure measuring equipment is not in direct contact with the medium, there will be very slight deviations. Compared with the split type, the split type has higher accuracy. But the existence of deviations is related to the manufacturer's product design and quality. The temperature sensor of Henan Junyuan Automation Equipment Co., Ltd. is installed at the bottom of the probe, so the pressure and temperature have no deviation from the true values. Of course, compared with the accuracy of the split vortex flowmeter, the split vortex flowmeter is more accurate. Because its temperature transmitter and pressure transmitter are installed on the pipe for measurement, the measurement results are more accurate.
1. The flowmeter should be used within the technical parameters of the working pressure and temperature range of the medium. Do not deliberately choose high-pressure or ultra-high-temperature instruments. The instrument should be selected based on the actual working pressure and temperature, because if you choose high-pressure grade or ultra-high temperature equipment, the cost will be high.
2. When selecting, try not to operate the flow rate at the lower limit, so the pipe diameter should be as small as possible to obtain a larger flow rate and flow range.
3. The lower flow limit of the vortex flowmeter depends on the working density and kinematic viscosity of the medium. Its upper limit flow rate is generally not affected by medium pressure and temperature. Therefore, to determine the flow range, only the lower flow limit that is actually available can be determined. After calculating the lower limit flow rate, check the flow range table to determine the corresponding pipe diameter.