The throttle device application instructions - henan SIKE instrument series
Selection of henan SIKE instrument company produces the throttling device is divided into standard throttling device and non-standard throttling device two kinds big.
1, USES: throttling device and differential pressure transmitter, and other supporting flow totalizer.especially, composed of differential pressure flowmeter, the throttle device installed on the pipeline, is flow measurement. Is mainly used in measuring various gas flowing through a pipe (pure or containing dust), steam (saturated or overheating) and liquid (conductive or non-conductive, strong corrosive, viscous or contained a small dirt particles, etc.) of the traffic. Can be directly measured or volume flow to mass flow.
2, characteristic: the throttle device was the first used, is the oldest and dosage the biggest, the most widely used method of flow measurement, it has many main advantages as follows.
Standard orifice meter: standard orifice plate (flat orifice, high-pressure lens orifice) standard orifice plate is the most simple throttling in a coffret structure, one of the most adaptable products. The design, manufacture and use in accordance with international standards IS05167 GB72624 rules or national standards. Standard orifice plate is measured flow differential pressure generator, cooperate with all sorts of differential pressure gauge or differential pressure transmitter to measure all kinds of fluid flow in pipes. Orifice flowmeter throttle device with differential pressure transmitter, full pipe flow, when they flow through the pipe of the throttle device, so the throttling parts before and after the pressure drop is produced, the pressure difference, the greater the flow of medium flow, in the front and rear of the throttling parts, the greater the pressure difference can be measured by the size of the pressure difference to measure fluid flow. This kind of measurement method based on the energy conservation law and the law of flow continuity as a benchmark. To measure the rate of flow of liquid, steam, gas, orifice flow meter is widely used in petroleum, chemical, metallurgical, power, light industry and other departments.
Circular orifice meter: the circular single structure, the measurement of all kinds of dirt medium through the orifice plate with a circular seam between pipe can easily pass. So the circular orifice flowmeter is widely applied in the dirt medium flow measurement. Upstream flow board without any block, can let the upstream flow velocity distribution of axisymmetric completely, is advantageous to the geometric similarity and dynamic similarity, improve the accuracy of measurement. Circular orifice meter is suitable for various fluid (gas, steam, liquid medium, such as: saturated steam and superheated steam, compressed air, all kinds of exhaust gas, burning furnace, cooling water, heavy oil, residual oil, fuel oil, condensate, all kinds of corrosive chemical solution, etc.
nozzle flowmeter is measuring the flow of differential pressure generator, cooperate with all sorts of differential pressure gauge or differential pressure transmitter to measure all kinds of fluid flow in pipes. Standard nozzle throttling device with differential pressure transmitter, can measure the rate of flow of liquid, steam, gas, nozzle flowmeter has a long history background, all kinds of test data is complete. Simple structure, no moving parts, stable and reliable long-term use, rich experience in design and manufacture and application. Nozzle flowmeter smaller pressure loss; To save energy; More strong and durable; Suitable for high temperature and high pressure fluid; Widely used in electric power, chemical and other industries of steam flow measurement.
V cone flowmeter: compared with normal throttle body, it changes the throttling layout, from the center hole throttle annular throttle instead. Long-term use, V cone flowmeter compared with general differential pressure flowmeter, high precision, good repeatability and long-term by the installation condition of limited small, wear resistance, wide measuring range, suitable for smudgy medium, small pressure loss, etc. More because of the v-shaped cone itself as the flow field of the rectifier and become a new type has unique properties of excellent flowmeter. V cone flowmeter is a coaxial installed in the measuring tube pointed cone for throttling a new type of differential pressure type flow measuring device.
Venturi tube: used for measuring the stable single-phase fluid flow in a closed pipe, often used to measure air, gas, gas, water and other fluid flow. Venturi tube according to the structure is divided into working "venturi tube and plug-in venturi tube. Hot blast stove combustion wind in a steel plant, the cold wind, gas metering (blast furnace gas, coke oven gas, converter gas) and thermal power plant boiler primary air and secondary air big diameter pipe, low velocity meter measurement has received the good effect. To solve the existing industrial enterprises in the low pressure, large diameter, all kinds of low velocity gas flow precise measurement. Wide measuring range, easy installation of flow measuring devices.
Porous orifice plate (also called balance meter) : in the standard orifice plate and the flow regulator on the basis of the research and development of a new type of throttling flow sensor. Balance meter have greatly improved the traditional throttling device, is not to say that with balance meter can completely replace the throttle device, the improvement and upgrade the product has the characteristics such as balanced reaction, because of the throttle device he is only a circulation aperture, throttling after fluid lost ideal state; And balance meter aperture has multiple functions, can maximize the rectifier into ideal fluid flow field in balance, thus the advantage of the differential pressure flowmeter play incisively and vividly.
Annubar Flowmeter belongs to differential pressure type flowmeter. Is the high-low voltage differential pressure measuring principle of measuring fluid dynamic pressure and the downstream pressure difference between the static pressure of formation, so as to achieve the goal of measuring flow rate. Annubar Flowmeteris mainly used for all kinds of energy in the process of industrial fuel such as liquid, gas, steam and gas measurement, has the high stability and repeatability. Annubar Flowmeter conforms to the principle of Bernoulli equation and its installation is simple, small pressure loss, high strength, is not affected by wear and tear, and the advantages of no leak and become ideal replace orifice plate products.