Gas turbine flowmeter

　　Product Name: Gas Turbine Flowmeter

　　I. Overview

　　The LWGQ gas turbine flowmeter is a high-precision, high-reliability gas precision metering that integrates temperature, pressure, flow sensors and intelligent flow totalizers, which is developed by itself by integrating theories of gas mechanics, fluid mechanics, and electromagnetics. The instrument has low and high pressure metering performance, multiple signal output methods and low sensitivity to fluid disturbances. It is suitable for the metering of natural gas, coal gas, liquefied gas, light hydrocarbon gas and other gases.

　　This product has been approved by the national explosion-proof product quality inspection department in accordance with GB3836.2000 "Electrical Equipment for Explosive Gas Atmosphere Part 1: General Requirements", GB3836.2-2000 "Electrical Equipment for Explosive Gas Atmosphere Part 2: Flameproof Type "d" 》And GB3836.4-2000 "Electrical Equipment for Explosive Gas Atmosphere Part 4: Intrinsically Safe Type "i"" standard inspection, and the explosion-proof marks are ExdⅡBT6 (flameproof type), ExiaⅡCT6 (intrinsically safe type). It is suitable for hazardous locations in zone 0 (intrinsically safe only) and zone 2 containing explosive gas mixtures of T1～T4 temperature groups of ⅡA, ⅡB, and ⅡC.

　　2. Product features

　　Special instrument for gas metering

　　Special instrument for oil and gas recovery system

　　High accuracy, generally up to ±1.5%R, ±1.0%R

　　Good repeatability, short-term repeatability can reach 0.05%-0.2%. It is precisely because of its good repeatability that it is the preferred flow meter in trade settlement;

　　The starting flow is low, and the low flow velocity, small measurement range is introduced.

　　It can detect the temperature, pressure and flow of the gas to be measured, can automatically track and compensate the flow, and display the cumulative volume of gas under standard conditions (Pb=101.325KPa, Tb=293.15K); real-time query of temperature, pressure, time, Numerical values ​​such as dates.

　　Built-in pressure and temperature sensors, high safety performance, compact structure, beautiful appearance

　　The instrument has explosion-proof and protection functions, the explosion-proof mark is ExdⅡBT6, ExiaⅡCT4, and the protection grade is IP65

　　The system works with low power consumption, a 3V10AH lithium battery can be used continuously for more than 3 years

　　The meter coefficient and cumulative flow value will not be lost for ten years after power failure

　　Three, working principle

　　When the fluid flows into the flowmeter, it is rectified and accelerated by the special integrated rectifier at the air inlet. Because the turbine blades and the fluid flow are at a certain angle, the turbine generates a rotating torque. After overcoming the friction torque and the fluid resistance torque, the turbine starts Spin. Within a certain flow range, the angular velocity of the turbine rotation is proportional to the fluid volume flow. According to the principle of electromagnetic induction, the magnetic sensor is used to induce a pulse signal proportional to the fluid volume flow rate from the coaxial rotating signal wheel. The signal is amplified, filtered, and reshaped and enters the intelligent flow totalizer together with the temperature and pressure sensor signals. The micro-processing unit of the instrument performs arithmetic processing, and directly displays the volume flow and total volume of the gas on the LCD screen.

　　4. Basic parameters and technical performance

　　1. Basic parameters: (Table 1)

　　2. Technical performance: