Toba flowmeter

One, the introduction:
WTB series allows toba flowmeter is in a wide range of industrial applications, summed up a set of complete about pitot and flowmeter measurement theory and the mature experience, the pitot and flowmeter history to new heights.In the process of theory and practice: solve the pitot and flowmeter measurement a wind speed of the electric power industry, and blockage of the air flow sensor, the wear problem;Solved the main steam of high temperature and high pressure measurement problems such as high velocity.Solved when measuring various gas sensor scale fouling problems.
Second, the measuring principle:
WTB series allows wei toba flowmeter sensor composed of a set of selecting pressure hole, on the principle of pitot tube to extract fluid flow velocity (total pressure, static pressure = dynamic pressure) and then converted to fluid volume flow to mass flow of differential pressure type flowmeter.Pitot flowmeter will probe is inserted into the pipe, the total pressure hole for fluid to flow direction, the static pressure hole for fluid to flow direction, through high precision transducer made the difference between the total pressure and static pressure that we have to differential pressure, fluid flow is calculated according to differential pressure.
Three, the classification of the toba flowmeter application and recommendation:
1, toba type flowmeter:
WTB - S series allows toba flowmeter is applied widely in industry brought, such as metallurgy, electric power, petroleum, chemical industry, etc.Sort is various, it applies fluid contains almost all relatively clean liquid medium.Such as the common steam, general gas and water fluid viscosity measurement can choose WTB -s allows type flowmeter.WTB -s type allows toba flow meter scale is simple, easy installation, just a Φ 25 mm hole in the pipe, the toba insert to the pipe center, by welding or flange and pipe connection.General working condition of gas/liquid, promote choose ordinary pitot flowmeter ordinary steam conditions, promote choose radiator pipe type wei toba flowmeter medium in the pipe flow to the change of working conditions, promote use double flow pitot and sensor when the nominal pipe diameter 5 mm or less Φ 25 mm or less, the recommendation to use pocket pitot flowmeter.
2, toba high temperature and high pressure meter:
WTB - M series allows wei toba flowmeter is mainly used in high temperature and high pressure high velocity or ultra high temperature super high pressure steam flowmeter.It adopts high temperature resistant, resistant to rotting 1 cr18ni9ti materials, a complete metal cavity structure, ensure the strength and rigidity, that under the high speed air flow scouring mechanism damage will not occur.The sensor in the process of measuring pressure is more stable and accurate.Used the medium to be measured temperature, the pressure sensor to temperature and pressure compensation, to ensure the accuracy of measurement.WTB - allows M type flowmeter in front of the product are made in excess of 150% of the working pressure stress test, to ensure safe and reliable.
3, toba prevent abrasion resistance meter:
BTB - B series wei toba flowmeter in metallurgy, electric power, petroleum, chemical and other industries widely used.Flow of medium containing impurities are optional WTB - B series allows pitot flowmeter measurement, such as a volume of electric power industry, the secondary gas of various materials in the air, chemical industry, metallurgical industry in various gas, etc.BTB - B type pitot the flowmeter's main function is to solve the problem of congestion and wear on the sensor.Introduction of form a complete set of ball valve device and safety protection device can give online sensor installation, remove the function.
The performance of the four, toba flowmeter features:
1, strong applicability: sensor for all kinds of fluid and a variety of pipe form, is the only a domestic and international actuators can do all kinds of fluid flow measurement.
2, high precision, in the range of 3% ~ 100% range accuracy is 0.2%.
3, energy saving, pitot intercepting the sensor area is very small, almost no pressure loss, operation cost is reduced greatly.By the national development and reform commission energy conservation information dissemination center recommended for 61 energy-saving products.
4, installation is simple: only in a position to open a suitable pipeline 25 ~ 60 mm hole, the sensor can be inserted into the pipe center.
5, easy maintenance: sensor itself without maintenance.Just for differential pressure transmitter zero and full range of inspection and the second table corresponding input current regular inspection.
6, reliability, simple structure, reasonable design.Because the guide medium pressure tube dormant for a long time, so the measurement precision can remain stable for a long time.
7, resistant to high temperature and high pressure: as the sensor with 1 cr18ni9ti, therefore can resistance to high temperature of 650 ℃, pressure 32 mpa.(special sensor can be made of material resistant to high temperature 1700 ℃)
8, wide range of measuring flow rate, gas flow rate in more than 1 m/s, liquid flow rate in more than 0.1 m/s can accurately measure the medium.For low velocity, small flow rate, large diameter measurement effect is a plus.
9, online installation and maintenance: no production under the condition of installation and maintenance.Fluid conditions
Five, toba flowmeter technology parameters:
1, specifications: (- DN5000 (mm);Insert: DN500 - DN5000 (mm);
2, the measurement accuracy: + / - 6.0%;Repeatability: + / - 0.1%;
3, scope: volume flow: 10:1;Mass flow rate: 8;
4, work stress: velocity-equalizing tube without functional: 20 mpa or less;Velocity-equalizing tube can be put forward: 10 mpa or less;
5, fluid temperature: 450 ℃ or less;
6, medium viscosity: 30 or less cp (crude oil);
Six, instrument in the long-term practice process to solve the problem:
1, solve the measurement of the electric power industry a wind speed, and blockage of the air flow sensor, the wear problem.
2, solve the main steam measurement problems such as high temperature, high pressure, high flow velocity.
3, solve the measurement problem of various kinds of gas sensor when knick-knack hanging dirt.
4, solves the ultra small diameter and large diameter (5 mm - 20000 mm), small flow and low velocity is difficult to measure.
5, achieved with the open hole, online installation.
6, has realized the online dredge, on-line cleaning.
7, which can measure all kinds of pipe (square, rectangle, diamond, trapezoid, oval, triangle and other pipeline).
8, implements the various detection device can check pitot flowmeter.
9, realized the high viscosity medium (measurement) of crude oil, tar, heavy oil, etc.
The measurement of insufficient 10, implements the straight pipe.
Seven, product maintenance instructions:
Wei toba flowmeter sensors should be regular cleaning when process piping overhaul, there are a number of ways for cleaning, such as air blow test tube accumulated filth;Scrub with kerosene and soft silk net, make each hole to maintain patency.May produce the cause of the failure and remove methods: serial number the causes of malfunctions Clear way.
1, differential pressure signal output: high and low pressure valve is not open, open the high and low pressure valve.
2, high and low pressure balance valves did not tighten, tighten balance valve.
3, differential pressure signal output is too small, pressure system has a leak phenomenon;Seriously looking for, eliminate the leakage.
4, improper secondary table range selection: uninteresting facts limit pressure transmitter.
5, differential pressure signal output is too large, secondary table range matching is undeserved, augmenting the upper limit, differential pressure transmitter back-pressure aperture jams, cleaning velocity-equalizing tube, eliminate congestion.
Eight, the application object:
ZW - WTB series toba flowmeter is a kind of sensor allows for a variety of medium flow meter, it can be widely applied to gas, steam and liquid flow measurement.Of gas: a wind speed, the secondary wind speed (quantity), the (negative pressure) air, oxygen, hydrogen and dry gas, converter gas, blast furnace gas and producer gas, coke oven gas, natural gas, liquefied gas, gas, chemical material, etc.;Gas: the superheated steam and saturated steam, wet steam, dry steam, two-way, etc.Liquid: water, dissatisfaction with pipe water, wash oil, sponge oil, light oil, tar, heavy oil, crude oil, corrosive liquid, chemical liquid material, paraffin, etc, all kinds of solution.
Nine, toba flowmeter selection table:

Ten, design selection and order notes:
1, pipe size: diameter x wall thickness (mm);
2, measuring medium name: medium density (kg/m3);
3, set the maximum flow: meter on the range of limit (kg/h or m3 / h);
4, process of minimum flow: (kg/h or m3 / h);
5, work pressure (Mpa);
6, work temperature: (° C);
7, such as with our company, please provide together: intelligent flow totalizer.especially pressure range, or pressure transmitter type, range;Temperature range, or models, range temperature transmitter.