turbine flowmeter

LWGY Turbine flowmeter is the use of advanced ultra-low power single-chip microcomputer technology developed turbine flow sensor and display integration of a new type of intelligent instrument, with a compact, intuitive and clear reading, high reliability, from external power interference, Lightning, low cost and other obvious advantages.

product description

A flowmeter for measuring with a turbine. It first converts the flow rate to the turbine speed, and then converts the speed into an electrical signal proportional to the flow rate. This flow meter is used to detect instantaneous flow and total accumulated flow, the output signal for the frequency, easy to digitize. In the figure, the induction coil and the permanent magnet are fixed together on the housing. When the ferromagnetic turbine blades pass through the magnet, the magnetic reluctance of the magnetic circuit changes, resulting in the induction signal. The signal is amplified and shaped by the amplifier and sent to a counter or frequency meter to show the total accumulated flow rate while the pulse frequency passes the frequency. Voltage conversion to indicate the instantaneous flow rate of the impeller is proportional to the flow rate, the number of revolutions of the impeller is proportional to the total flow of the turbine flowmeter output is the frequency modulation signal, not only improve the detection circuit anti-jamming, and simplify the flow detection The system has a range of up to 10: 1. , The accuracy of the turbo flowmeter with a small inertia and a small size within ± 0.2% can reach 0.01 seconds.

In Europe and the United States turbine flowmeter is followed by the orifice flowmeter after the second statutory natural gas flowmeter, has developed into a multi-species, full range, multi-size, mass production scale of natural gas flowmeter. The standard specification is also very complete, but there are shortcomings: the measurement medium cleanliness requirements are higher, the use of limited time However, according to foreign use department said: 240 units used 8 to 15 years of flow meter cycle test, found The deviation of the instrument accuracy is still within the specified range. In addition, the use of a high efficiency rectifier rectifier and turbine flow sensor coupled into a structural integration of the gas turbine flowmeter, in the upstream side of the flow block for the elbow or semi-open valve under the conditions, only 2D straight pipe length, For the city with a narrow installation space, it is very prominent features.

Turbine flowmeter is the main type of speed flowmeter. When the measured fluid flows through the turbine flowmeter sensor, the impeller is rotated by the action of the fluid. The speed is proportional to the average velocity of the pipeline. At the same time, The magnetic flux generated by the electromagnet is changed to change the magnetic flux of the coil. According to the principle of electromagnetic induction, the electric pulse signal, that is, the electric pulse signal, is induced in the coil, and the frequency of the electric pulse signal is proportional to the flow rate of the measured fluid.

Turbine flowmeter, volumetric flowmeter and Coriolis mass flowmeter are the three types of repeatability, the best precision products, and turbine flowmeter has its own characteristics, such as simple structure, less processing parts (High temperature, high pressure and low temperature) so far, such flow meter products up to the technical parameters: caliber 4-750mm, the pressure (high pressure, high pressure and low temperature), such as flow, Up to 250MPa, the temperature is -240-700 ℃, like this technical parameters of the other two types of flowmeter is difficult to achieve.

Turbine flowmeter is widely used in the following measurement objects: oil, organic liquid, inorganic liquid, liquefied petroleum gas, natural gas, gas and low temperature fluid in foreign liquefied petroleum gas, refined oil and light crude oil and other transport and gathering stations, large The first and last stations of the crude oil pipeline are used for trade settlement. In Europe and the United States turbine flowmeter is second only to the orifice flowmeter gas meter, only the Netherlands in the natural gas pipeline on the use of more than 2,600 different sizes, pressure from 0.8MPa to 6.5MPa gas turbine flowmeter, they Has become an excellent natural gas flow meter. Although the excellent measurement characteristics of the turbine flowmeter by people's favor, can be given the impression that the activities of the components, the use of short, can not help but hesitate in the selection, after people's tireless efforts, it should be said that the situation greatly improved. Which products have been developed for the multi-species, full range, and more specifications of the scale of mass production.

It should be noted that turbo flowmeter has been widely used in a number of special sectors, such as scientific research, defense science and technology, metrology, in addition to the large number of industrial sectors, and the use of these areas has just avoided its weaknesses (not suitable for long-term continuous use) , Give full play to its characteristics (high precision, good repeatability, can be used for high pressure, high temperature, low temperature and micro-flow conditions). In these areas, mostly based on the special requirements of the object to be designed for specialized structural design, they are dedicated instrument does not carry out mass production.

Basic type

This type of turbine flow product itself does not have the on-site display function, only the traffic signal remote output. The flow signal can be divided into pulse signal or current signal (4-20mA); instrument low price, high integration, small size, especially for the secondary display, PLC, DCS and other computer control system used in conjunction.

intelligent

Integrated turbine flowmeter, the use of advanced ultra-low power single-chip microcomputer technology developed by the turbine flow sensor and display integration of a new type of intelligent instrument, the use of dual LCD display, with a compact, intuitive and clear reading, reliability High, no external power supply interference, anti-lightning, low cost advantages. Instrument with instrumentation correction of three points, intelligent compensation meter coefficient of non-linear, and can be field correction. High-definition liquid crystal display also shows instantaneous flow (4 significant digits) and cumulative flow (8 significant digits with clear function). All valid data is powered down for 10 years without losing This type of turbine flowmeter are explosion-proof products, explosion-proof grade: ExdIIBT6.

Lead to intelligence

The series of flowmeter using advanced ultra-low power single-chip microcomputer technology developed by the turbine flow sensor and display integrated integrated new intelligent instrument, through the micro-processing unit by the temperature and pressure detection analog channel, flow sensor channel acquisition signal (Instantaneous flow, daily cumulative flow, total accumulated flow, temperature, pressure, time, date, battery power) is displayed in the liquid crystal display by the temperature and pressure compensation according to the gaseous equation, and the compression factor is automatically corrected. Output conditions, standard pulse signal, 4-20mA, RS485, IC card signal and other communication signals. The instrument uses built-in lithium battery and 24VDC dual power supply. When the user does not need any signal output function, it can not supply power to the instrument 24VDC. The instrument automatically switches to the built-in lithium battery, and the battery can work continuously for more than 3 years. The turbo flowmeter for the explosion-proof products, explosion-proof grade: ExdIIBT6.

Intelligent gas

Intelligent Gas Turbine Flowmeter [1] is a new generation of high-precision, high-reliability gas precision measurement, which has been developed by integrating the advanced technology of flow meter at home and abroad. It has been developed by integrating the theory of gas mechanics, fluid mechanics and electromagnetism. The instrument has excellent low pressure and high pressure metering performance, a variety of signal output methods and low sensitivity to fluid disturbances, widely used in natural gas, coal gas, liquefied petroleum gas, light hydrocarbon gas and other gas measurement. This type of turbine flow product itself does not have the on-site display function, only the flow signal to pulse signal transmission way. Instrument low price, high integration, small size, especially for the secondary display, PLC, DCS and other computer control systems used in conjunction. This type of turbine flowmeter are explosion-proof products, explosion-proof grade: ExdIIBT6.

New liquid

The new version of the liquid turbine flowmeter is a new generation of turbo flowmeter, which has been used in the design of advanced flow meter. It has been optimized for a new generation of turbo flowmeter with simple structure, light weight, high precision, good repeatability, responsive and easy installation and maintenance. Measurement of closed pipes and stainless steel 1Cc18Ni8Ti, 2Cr13 and corundum AI3O3 carbide can not corrode, and no fiber, particles and other magazines, the working temperature of the kinematic viscosity of less than 5 × 10-6m2 / s liquid, for the kinematic viscosity greater than 5 × 10-6m2 / s of the liquid, the flowmeter can be used after the real liquid calibration, if the special function of the display instrument matching, but also for quantitative control, over-warning lights, flow meters and energy is the ideal instrument.

sensor

This type of turbine flow product itself does not have the on-site display function, only the traffic signal remote output. The flow signal can be divided into pulse signal or current signal (4-20mA); instrument low price, high integration, small size, especially for the secondary display, PLC, DCS and other computer control system used in conjunction.

This type of turbine flow products are divided into basic and explosion-proof (ExdIIBT6) two.

According to the different output signals, such products can be divided into LWGY- □ N type and LWGY- □ A type

LWGY- □ N-type sensor: 12 ~ 24VDC power supply, three-wire pulse output, high level ≥ 8V, low ≤ 0.8V; signal transmission distance ≤ 1000 meters;

LWGY- □ A-type transmitter: 24VDC power supply, two-wire 4-20mA output, the signal transmission distance ≤ 1000.

Intelligent integrated turbine flowmeter

The use of advanced ultra-low power single-chip microcomputer technology developed turbine flow sensor and display integration of a new type of intelligent instrument, the use of double-chip LCD display, with a compact, intuitive and clear reading, high reliability, Interference, anti-lightning, low cost and other obvious advantages. Instrument with instrumentation correction of three points, intelligent compensation meter coefficient of non-linear, and can be field correction. High-definition liquid crystal display also shows instantaneous flow (4 significant digits) and cumulative flow (8 significant digits with clear function). All valid data is powered down for 10 years without losing The turbine flowmeter is explosion-proof products, explosion-proof grade: ExdIIBT.

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