1Intelligent rotary flow meterProduct Overview
When the fluid flowing along the axial direction enters the inlet of the flow sensor, the vortex generator forces the fluid to undergo rotational motion, thus generating a vortex flow at the center of the vortex generator. The vortex flow spirals in the Venturi tube and reaches the contraction section, suddenly throttling to accelerate the vortex flow. When the vortex flow enters the diffusion section, it is forced to undergo a spiral type secondary rotation due to the backflow effect. At this point, the rotational frequency of the vortex flow is proportional to the velocity of the medium and is linear. The weak charge signals detected by two piezoelectric sensors are differentially amplified, filtered, and shaped by a preamplifier into two pulse signals with frequencies proportional to the flow rate. At the same time, the processing circuit compares and distinguishes the phase of the two pulse signals, removes interference signals, and counts and processes the normal flow signal. Send the normal flow signal to the CPU in the correction instrument for counting and processing, obtain the volumetric flow rate of the working condition, and convert it into instantaneous flow rate according to the volume correction model and accumulate it to obtain the standard volume total.
IIIntelligent rotary flow meterfeature
Adopting unique dual sensor technology and circuit processing technology, it effectively solves the interference of pressure fluctuations and mechanical vibrations on flow signals, ensuring accurate and reliable measurement.
Integrating temperature, pressure, flow sensors, and volume correction instruments, it can automatically track and correct the temperature, pressure, and compression factor of the measured gas, directly measuring the standard volume flow rate and total amount of the gas.
Adopting digital temperature and pressure sensors, and communicating data with the meter head through I2C interface, the measurement accuracy is independent of the meter head, and the same specifications can be directly exchanged for easy maintenance, calibration, and use.
The digital pressure sensor has a built-in temperature compensation table of -15 ℃ to+65 ℃, with small temperature drift and high accuracy.
In the correction model of the natural gas compression factor using the correction instrument, there are two methods to choose from: AGA NX-19 and SGERG-88 equation.
Adopting low-power high-tech, it can work with both internal and external power sources, and the internal battery can be used continuously for more than five years.
No mechanical rotating parts, high reliability, good stability, minimal maintenance, and good adaptability to media.
The large screen LCD displays standard volume flow rate, total standard volume, temperature, pressure, and battery capacity, with clear and intuitive display and convenient reading.
● Powerful function, with three pulse signal outputs, three historical data recording methods, and two standard current signal output methods to choose from.
GPRS wireless data transmission can be achieved through RS485 interface and data collector, which is safe and reliable, and can facilitate automated management. The RS485 communication protocol complies with the MODBUS protocol.
The header can rotate 180 ° freely, making installation convenient.
The pressure and temperature sensors adopt an external structure and are designed with four-way valves and protective sleeves, which facilitates online disassembly, replacement, and calibration of the pressure and temperature sensors.
3、 Main technical parameters of intelligent rotary flow meter