Hi, this is little control in the housekeeper, today is still busy little bees industrial control small knowledge, let's follow the housekeeper learning, a useful knowledge of small oh every day
Vortex flow meter and gas turbine flowmeter is a type of gas turbine flowmeter is multi blade rotor (turbine) feel the fluid average flow velocity, is derived from and flow or instrument, of the total gas vortex street flowmeter is based on the principle of the karman vortex street design and manufacture, application of fluid oscillation principle to measure the flow rate, fluid in the pipeline through the vortex flow transmitter in the triangular prism of vortex occurred after the body up and down alternately produced is proportional to the velocity of the two columns of vortex, the release of the vortex frequency and flow vortex in body fluid average velocity and vortex occurred body features,
Gas turbine flowmeter, under certain conditions, the speed is proportional to the velocity of flow, the current body impact turbine blades, turbine rotating, turbine speed changes along with the change of flow, the flow is big, the speed of the turbine is large, then through magnetoelectricity conversion device of the turbine speed is converted to the corresponding frequency pulses of electricity, after preamplifier amplification into display instrument to count and, according to the number of pulses per unit time and the cumulative pulse number can be calculated instantaneous flow and cumulative flow,
The characteristics of the gas turbine flowmeter:
1, good repeatability, short-term repeatability of up to 0.05% - 0.2%, it is because of good repeatability, such as regular calibration or online calibration can have extremely high degree, is a preferable flow meter in trade settlement,
Total 2, the output pulse frequency signal, and is suitable for metering and connected to the computer, no zero drift, strong anti-jamming capability,
3, the high frequency signal can be obtained (3-4 KHZ), strong signal resolution,
4, wide range of degrees, large caliber of 40:1-10:1, small diameter of 6:1 or 5:1,
5, the structure is compact and lightweight, easy installation and maintenance, large flow capacity,
Gas vortex street flowmeter is produced according to the principle of Carmen (Karman vortex street), is mainly used for industrial piping medium fluid flow measurement, such as gas, liquid, and a variety of media such as steam,
The characteristics of vortex street flowmeter 1, gas of fluid vibration principle of vortex flowmeter is a new type of flowmeter, used in petroleum, chemical industry, metallurgy, paper making industries, measurement of fluid in pipe, gas flow meter,
2, the flowmeter have no moving parts, high reliability, high precision, long life, can be in a very wide range of flow rate measurement of the liquid instantaneous flow and cumulative flow, the medium temperature, pressure, viscosity and effects of the composition, not stuck at the same time, BuKa, not easy scaling, resistance to high temperature, high pressure, safety explosion-proof, suitable for bad environment,
3, gas vortex flowmeter is simple in structure, vortex transducer installed directly on the pipeline, overcome the pipeline leakage phenomenon, in addition, the gas pressure loss of vortex flowmeter is lesser, span a wide range, the saturated steam measurement range can be up to 30 to 1,
4, the installation location to minimize the pipe steam hammer impact to vortex occurred body, large vibration and cannot eliminate, unfavorable use gas vortex flowmeter,