The pulse frequency signal output by gas vortex flowmeter is not affected by the change of fluid properties and components, that is, in a certain Reynolds number range, the instrument coefficient is only related to the shape and size of vortex generator and pipeline. However, as a flowmeter, it is necessary to detect mass flow in material balance and energy measurement. At this time, the output signal of the flowmeter should not only monitor the volume flow, but also monitor the fluid density, and the physical properties and components of the fluid still have a direct impact on the flow measurement. Gas vortex flowmeter is a new type of flowmeter used to measure fluid flow in closed pipeline according to Carmen vortex principle. Because of its good medium adaptability, it can directly measure the working volume flow of steam, air, gas, water and liquid without temperature and pressure compensation, and can measure the standard temperature and pressure volume flow and mass flow together with the temperature and pressure sensor, which is an ideal substitute for throttling flowmeter.
In order to improve the high temperature resistance and vibration resistance of gas, gas vortex flowmeter can be used under severe working conditions of high temperature (350℃) and strong vibration (≤ 1g) because of its unique structure and material selection. In practical application, with the change of load, the maximum flow rate is often much lower than the upper limit of the instrument, and the minimum flow rate is often lower than the lower limit of the instrument. The instrument is not working in its optimal working area. In order to solve this problem, the diameter is usually reduced at the measuring place to improve the flow rate, and the instrument with smaller diameter is selected to facilitate the measurement of the instrument. However, this variable diameter method must have a straight pipe section with a length greater than 15D between the variable diameter pipe and the instrument used for rectification.
In order to facilitate the use of gas vortex flowmeter, the battery-powered field display gas vortex flowmeter adopts micro-power consumption and high technology, and can run continuously for more than one year by using lithium battery, saving the purchase and installation costs of cables and display instruments, and can display instantaneous flow and accumulated flow on the spot. The integrated vortex flowmeter with temperature compensation is also equipped with a temperature sensor, which can directly measure the temperature of saturated steam and calculate the pressure, thus displaying the mass flow of saturated steam. Temperature and pressure compensation integrated temperature and pressure sensor can directly measure the temperature and pressure of gas medium when used for gas flow measurement, thus displaying the standard temperature and pressure volume flow of gas.