When the fluid along the axial direction enters the inlet of the flowmeter, the vortex blade forces the fluid to rotate, so a vortex flow is generated in the center of the vortex generator. The vortex flow precesses in the venturi, and reaches the contraction section and suddenly throttling makes the vortex flow. accelerate. When the vortex suddenly enters the diffusion section, it is forced to perform a precessing secondary rotation due to the effect of the backflow. If the instrument has an optimized geometric structure, the frequency of the vortex is proportional to the flow rate in a wide range, and it is not linear. This frequency is the weak electric signal detected by the piezoelectric sensor, which is amplified, filtered and shaped by the preamplifier, and then converted into a pulse signal proportional to the flow rate, and finally sent to the flow totalizer for calculation and processing.
1. No mechanical moving parts, corrosion resistance, stable and reliable, long life, no special maintenance for long-term operation;
2. The intelligent flowmeter integrates flow probe, microprocessor, pressure and temperature sensor, and adopts a built-in combination to make the structure more compact. It can directly measure the flow, pressure and temperature of the fluid, and automatically track the compensation and compression factor in real time. Amend
3. Using 16-bit computer chips, high integration, small size, good performance, and strong functions of the whole machine;
4. The use of dual detection technology can effectively improve the strength of the detection signal and suppress the interference caused by pipeline vibration;
5. Adopting domestic advanced intelligent anti-seismic technology, effectively suppressing interference signals caused by vibration and pressure fluctuations;
6. Adopting Chinese character dot matrix display, with many display digits, intuitive and convenient reading, which can directly display the volume flow in working state, the volume flow in standard state, the total amount, and parameters such as medium pressure and temperature;
7. Using EEPROM technology, convenient parameter setting, long-term storage, and up to one year of historical data;
8. The converter can output frequency pulses, 4-20mA analog signals, and has an RS485 interface, which can be directly networked with a microcomputer, and the transmission distance can reach 1.2km;
9. The whole machine has low power consumption and can be powered by internal battery or external power supply;
10. With the company's FM data collector, remote data transmission can be carried out through the Internet or telephone network. Pressure and temperature signals are the input mode of the transmitter, which is highly interchangeable;
stainless steel 1Cr18N9Ti or aluminum alloy
Note: Accuracy: the system accuracy after temperature and pressure correction;
Standard state conditions: P=101.325KPa, T=293.15K
Ambient temperature: -30℃～+65℃
Relative humidity: 5%～95%
Medium temperature: -20℃～+80℃
Atmospheric pressure: 86KPa～106KPa
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