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Basic introduction and working principle of gas turbine flowmeter
The intelligent liquid turbine flowmeter is a new type of intelligent instrument developed using advanced ultra-low power single-chip microcomputer te
Product details
The intelligent liquid turbine flowmeter is a new type of intelligent instrument developed using advanced ultra-low power single-chip microcomputer technology, which integrates turbine flow sensors and display integration. It adopts a dual row LCD on-site display, with a compact mechanism, intuitive and clear readings
High reliability, no external power interference, lightning resistance, and low cost are obvious advantages.
Product Introduction:
Gas turbine flow meters are mainly used for measuring the flow rate of medium fluids such as air, nitrogen, oxygen, hydrogen, biogas, natural gas, steam, etc. in industrial pipelines. When measuring the volumetric flow rate under working conditions, it is almost not affected by parameters such as fluid density, pressure, temperature, viscosity, etc
influence. No movable mechanical parts, therefore high reliability and low maintenance. The instrument parameters can remain stable for a long time. The gas vortex flowmeter adopts a piezoelectric stress sensor, which has high reliability and can operate within the working temperature range of -20 ℃ to+250 ℃. There is a model
It is an advanced and ideal flow meter that can be used in conjunction with digital systems such as computers, as it has both quasi standard signals and digital pulse signal outputs.
The pulse frequency signal output by gas vortex flowmeter is not affected by fluid properties and composition changes, that is, the instrument coefficient is only related to the shape and size of the vortex generator and pipeline within a certain Reynolds number range. But as a flowmeter in material balance
In energy metering, it is necessary to detect mass flow rate. At this time, the output signal of the flowmeter should simultaneously monitor volume flow rate and fluid density. Fluid properties and components still have a direct impact on flow metering. The gas vortex flowmeter is based on the Karman vortex source
A new type of flowmeter for measuring fluid flow in closed pipelines. Due to its excellent adaptability to media, it can directly measure the volumetric flow rate of steam, air, gas, water, and liquid without temperature and pressure compensation. It is equipped with temperature and pressure sensors
Sensors can measure volumetric and mass flow rates under standard conditions, making them an ideal alternative to throttling flow meters.
The gas vortex flowmeter is designed to improve the high temperature resistance and vibration resistance of gases. Due to its unique structure and material selection, the sensor can be used in harsh working conditions such as high temperature (350 ℃) and strong vibration (≤ 1g). In practical applications, the maximum flow is often
The quantity is much lower than the upper limit of the instrument, and with the change of load, the minimum flow rate often falls below the lower limit of the instrument. The instrument is not working in its optimal operating range. To solve this problem, it is usually necessary to reduce the diameter at the measurement point to increase the flow rate at the measurement point
Flow rate, and smaller diameter instruments are selected for easier measurement, but this variable diameter method requires a straight pipe section with a length of 15D or more between the variable diameter pipe and the instrument for rectification, making processing and installation inconvenient.
Temperature compensation integrated gas vortex flowmeter
Temperature compensation integrated gas vortex flowmeter
For the convenience of use, the on-site display gas vortex flowmeter powered by batteries adopts low-power high-tech. It can run continuously for more than a year with lithium battery power supply, saving the procurement and installation costs of cables and display instruments
It can display instantaneous flow rate, cumulative flow rate, etc. on site. The temperature compensated integrated vortex flowmeter also comes with a temperature sensor, which can directly measure the temperature of saturated steam and calculate the pressure, thereby displaying the mass flow rate of saturated steam. Temperature and pressure compensation
The integrated system is equipped with temperature and pressure sensors for gas flow measurement, which can directly measure the temperature and pressure of the gas medium, thereby displaying the standard volumetric flow rate of the gas.
Application areas:
Suitable for low to medium flow rate clean gases such as natural gas, nitrogen, compressed air, etc; Not suitable for liquids, high-temperature steam, and moisture.
overview
Gas turbine flowmeter is a precision flow measurement instrument that can be used to measure the flow rate and total amount of liquids when paired with corresponding flow integrator instruments. Gas turbine flow meters are widely used for measurement and control in fields such as petroleum, chemical, metallurgical, and scientific research
System. Gas turbine flow meters equipped with sanitary fittings can be applied in the pharmaceutical industry.
The structure of the integrated gas turbine flowmeter is explosion-proof design, which can display the total flow rate, instantaneous flow rate, and flow rate percentage. The battery adopts long-lasting lithium battery, and the service life of the single function accumulator battery can reach more than 5 years. The multifunctional display meter battery
The service life of the pool can also reach more than 12 months.
The integrated header can display a wide range of flow units, including cubic meters, gallons, liters, standard cubic meters, standard liters, etc. Fixed pressure and temperature parameters can be set to compensate for gas. For situations where pressure and temperature parameters do not change significantly, it can
Use this instrument for fixed compensation integration.
characteristic
Low pressure loss and impeller with anti-corrosion function;
Adopting advanced ultra-low power single-chip microcomputer technology, the whole machine has strong functions, low power consumption, and superior performance.
Intelligent flow display with non-linear accuracy compensation function. The accuracy of the correction formula is better than ± 0.02%
The instrument coefficient can be set online by buttons and displayed on the LCD screen, which is intuitive, clear, and highly reliable
Using EEPROM for power down protection of accumulated flow and instrument coefficient, with a protection time greater than 10 years
Using high-performance MCU central processing unit to complete data acquisition, processing, display output, cumulative flow, instantaneous flow, etc
Convenient human-machine interface implementation with screen display, data transmission in standard 485 format.
Adopting fully cemented carbide (tungsten carbide) shielded cantilever beam structure bearings, integrating rotating bearings and pressure bearings, greatly improving the bearing life, and can work in media with a small amount of sediment and dirt.
Adopting 1Cr18Ni9Ti all stainless steel structure (2Cr13 for turbine), it has good anti-corrosion performance.
Easy to repair, with a self rectifying structure, small and lightweight, simple structure, can be assembled and disassembled in a short time,
Internal cleaning is simple.
Has strong resistance to magnetic interference and vibration, reliable performance, and long lifespan
Low lower flow rate, wide measurement range,
The on-site display LCD screen has clear and intuitive display, low power consumption, and can run continuously for more than 5 years with a 3V lithium battery power supply,
Corrosion resistant, suitable for acidic and alkaline solutions
Instrument classification:
According to the classification of instrument functions, it can be divided into three categories
1. Gas turbine flow sensor/transmitter: This type of turbine flow product itself does not have on-site display function, only transmits and outputs flow signals remotely. Flow signals can be divided into pulse signals or current signals (4-20mA); Low price of instruments, set
Highly efficient and compact in size, especially suitable for use with computer control systems such as secondary displays, PLCs, DCS, etc. This type of turbine flowmeter is an explosion-proof product with an explosion-proof rating of ExdIIBT6.
Application scenario: It can be used as a collection instrument for working condition flow signals, transmitting flow signals remotely to the upper computer
2. Intelligent integrated gas turbine flowmeter
Integrated intelligent instrument, adopting dual row LCD on-site display, with compact mechanism, intuitive and clear reading, and high reliability
3. It has obvious advantages such as not being affected by external power interference, lightning resistance, and low cost.
Application scenarios:
1. As an industrial control instrument in working conditions where temperature and pressure are relatively stable.
2. In working conditions where temperature and pressure are relatively stable, users can calculate the standard flow rate based on the gas equation of the instrument readings.
3. Intelligent temperature and pressure compensation integrated gas turbine flowmeter
The HLWQ-D gas turbine quantity meter is equipped with temperature and pressure sensors, as well as an intelligent flow integrator. Through a microprocessor unit, the real-time collected flow, temperature, and pressure signals are compensated for temperature and pressure according to the gas equation, and the compression factor is automatically adjusted
Then visually display the volumetric flow rate under standard conditions.
Application scenarios: Accurate measurement or trade settlement
working principle:
The gas turbine flowmeter uses a turbine for measurement. It first converts the flow rate into the rotational speed of the turbine, and then converts the rotational speed into an electrical signal proportional to the flow rate. This type of flowmeter is used to detect instantaneous flow and total cumulative flow, and its output signal is frequency
Rate, easy to digitize. The induction coil and permanent magnet in the picture are fixed together on the housing. When the ferromagnetic turbine blades pass through the magnet, the magnetic resistance of the magnetic circuit changes, thereby generating an induction signal. The signal is amplified and shaped by an amplifier and sent to the meter
A counter or frequency meter that displays the total accumulated flow rate. Simultaneously, the pulse frequency is converted from frequency to voltage to indicate instantaneous flow rate. The rotational speed of the impeller is proportional to the flow rate, and the rotational speed of the impeller is proportional to the total amount of flow. The output of a turbine flowmeter is frequency
Modulation signals not only improve the anti-interference performance of the detection circuit, but also simplify the flow detection system. Its range ratio can reach 10:1, and the accuracy is within ± 0.2%. The time constant of turbine flow meters with small inertia and size can reach 0.01 seconds
.
Gas turbine flow meters are widely used in petroleum, organic liquids, inorganic liquids, liquefied gas, natural gas, and low-temperature fluids
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