Understand the gas turbine flowmeter from the following four points
I. Overview of gas turbine flowmeter
The intelligent gas turbine flowmeter is a new generation flowmeter that integrates flow, temperature and pressure detection functions and can automatically compensate for temperature, pressure and compression factors. It is a petroleum, chemical, electric power, metallurgy, industrial Boiler and other industries and industries. Ideal for gas metering and urban gas, gas pressure regulating stations and gas trading metering
Second, the main features of gas turbine flowmeter products
The temperature and pressure of the medium can be detected and automatically compensated and the compression factor automatically corrected to directly detect the standard volume flow and standard volume of the gas.
A variety of compensation methods are available for users to choose: temperature and pressure automatic detection compensation, pressure automatic detection temperature setting compensation, temperature automatic detection pressure setting compensation, temperature and pressure are set compensation. At the same time, the pressure value and temperature value of the reference state can be set by the user to meet the needs of different fields.
The new type of sensor has low starting flow, low pressure loss, good anti-vibration and anti-pulsation performance, low corrosion resistance, good reliability and long service life.
Using a new microprocessor and high-performance integrated chip, the operation precision is high, the whole machine has powerful functions and superior performance.
Using advanced micro-power high-tech, the overall power consumption is low. It can be operated by long-term power supply of internal battery and power supply by external power supply.
According to the flow frequency signal, the meter coefficient can be linearly corrected in stages, and the metering accuracy of the meter can be improved according to the needs of the user.
With LCD display, clear and intuitive, easy reading.
It adopts EEPROM data storage technology and has the function of storing and inquiring historical data. Three kinds of historical data recording methods are available for users to choose.
Multi-physical parameter alarm output, which can be selected by the user.
It adopts RS485 interface to connect with the host computer, only two communication lines are needed, and the installation cost is low. At the same time, it can also form an automatic meter reading system, which is convenient for centralized management by users.
Implementation of national JJG198 - 94 "speed flowmeter test procedures" and "gas turbine flowmeter" corporate standard.
Third, the working principle of gas turbine flowmeter
When the airflow enters the flowmeter, it first passes through the leading fluid of the independent movement and accelerates. Under the action of the fluid, since the turbine blade is at an angle with the fluid flow direction, the turbine generates a rotational moment, and the turbine starts after overcoming the resistance torque and the friction torque. Turn. When the moments reach equilibrium, the rotational speed is stable, and the rotational angular velocity of the turbine is linear with the flow rate. The magnet on the rotating transmitting disk periodically changes the magnetic reluctance of the sensor, thereby inducing a proportional relationship with the volumetric flow of the fluid at both ends of the sensor. Pulse signal. The signal is amplified and shaped by the preamplifier, and the pressure and temperature signals detected by the pressure sensor and the temperature sensor are simultaneously sent to the flow totalizer for processing, and the standard volume flow rate and the standard volume total are directly displayed.
Fourth, the gas turbine flowmeter on-site use precautions
On-site installation and maintenance of the gas turbine flowmeter must comply with the warning “ Do not open the cover when there is an explosive gas †and turn off the external power supply before opening the cover.
When the product is used outdoors, it is recommended to add a protective cover.
The selection should be within the specified flow range to prevent overspeed operation to achieve the desired degree and to guarantee a normal service life. (The flowmeter may be damaged due to pressure test, purge pipe or exhaust caused by overspeed, and turbine running in reverse flow)
When the flowmeter is put into operation, the valve should be slowly opened to prevent the instantaneous airflow impact and damage the turbine.
Lubricating oil should be operated according to the signboard. The number of refueling depends on the degree of cleanliness of the temperament, usually 2 to 3 times per year .
It is not allowed to open the back cover when the flowmeter is running, or to move the internal parameters, otherwise it will affect the normal operation of the flowmeter.
Do not loosen the fixed part of the flowmeter at will.
Protection of the pressure sensor When using the flowmeter, the pressure overload of the flowmeter should be 1.5 times the rated working pressure of the pressure sensor (ie 1.5 times the medium pressure ).
Gas turbine flow meter 
Solid Incinerator, Marine Incinerator, Marine Waste Incinerators
Fuente International Co., Ltd. , http://www.shipssp.com