QTWG Series Gas Turbine flow meter

Overview

QTWG series gas turbine flow meter is one kind of precision measuring instruments which for gas measuring.This Flow meter has the characteristics of low pressure loss,high accuracy,low initiating flow,anti vibration and pulsation flow resistance,widely range ratio etc.

When design QTWG series Gas Turbine Flow Meter, we consider the gas compressibility, Volume quantity is closely related with medium temperature and pressure, thus we add the temperature and pressure sensors so that monitor the change of medium temperature and pressure,directly make working condition flow change into standard condition flow and ensure measuring accuracy.

QTWG series gas turbine flow meter could be separately used for gas that is clean,low viscosity,such as Air,Natural gas,LPG,Methane gas,N2,Ar,CO2,CO etc.

QTWG could be widely used in gas measuring from Petroleum, Chemical,Electric power,Industrial boiler etc.In addition,QTWG series gas turbine flow meter also be used in Gas-fired,Gas pipeline network,city gas field etc.

Working Principle

QTWG gas turbine flow meter is made up of base table and display,among them,the base table contains body,Rectifier,Turbo,Temperature sensor,Magnetic switch sensor,Pressure sensor and other important parts.

When medium enter the flow meter,through integration of the two level rectifier,medium be rectified and accelerated,then acts on the turbine blades which make a certain angle with flow direction,same time turbine will produces rotational torque,turbine blades begins to rotate after turbine overcomes the resistance moment and friction moment.When all moments reach balance,invariables turning speed,turbine rotation angular velocity is liner relationship with flow. Utilizing electromagnetic induction principle,through the top magnetizer of rotating turbine generator periodically change magnetic resistance and make magnetic field change accordingly,thus induction of the pulse signal that it is proportional to the volume flow rate.

This signal is amplified by preamplifier and shaped,the signal will be entered into integrating instrument together the temperature and pressure signal,then the integrating instrument will calculate and convert to flow value,the directly display standard instantaneous volume flow and total flow. 

Features

l  Rectifying device could be installed at the installation condition is not good and medium velocity change larger,also could keep the reliability of measurement.

l  Dust-proof structure can effectively prevent the impurity of the medium enter into bearing and cause rapid wear and stuck.

l  Low installation requirements,front straight pipe ≥2D,back straight pipe ≥1D,this could ensure the accuracy of flow meter

l  Intelligent integration design could dynamically detect the temperature and pressure of medium ,and automatic compensation and compression factor correction,directly display gas standard instantaneous flow and standard total flow.

l  Aluminum alloy turbine have some features:High strength,Corrosion resistance,Anti-aging,Long service life,High accuracy and good repeatability.

l  Advanced microcomputer technology and high performance single chip make complete meter more powerful and superior performance.

l  Advanced double power supply and micro power consumption technology,complete meter with low power consumption.Both could run on battery for a long time (Two lithium batteries could be used 3 years) and also could connect outside power.

l  Large screen backlight LCD display,could clearly reading under dark environment.

l  Flow meter with pulse output,also could add 4-20mA output,IC card quantitative pulse signal etc. according to user’s requirement.

l  Adopt RS485 communication,could be matched with MODEM,through telephone network could build automatic reading management system, higher automation.

l  Adopt E2-PROM data storage technology,setup parameters could be keep long time after outage.

l  The low voltage alarm(≤2.7V) of internal battery could remind user to replace battery.

l  The intelligent integrating instrument could rotate 180 degrees,it is convenient reading,Unexpected power outage,Autosave data,Prevent data lost.

l  Flow meter with signal output calibration function and could 4,8,16,20mA and 0~1000Hz

l  Adopt over wide temperature LCD technology,and LCD could working for -30~80℃.

l  Outside power is isolated with main circuit of flow meter, Isolation voltage reach 1000V

l  Reliable electromagnetic compatibility design

l  One aviation plug,all output terminal