Helical Rotor Flowmeters (aka: Dual Rotor Flowmeters or Screw Flowmeters) are precision meters used to measure and control liquid flow in pipes. The flowmeter can be manufactured with different materials and is widely used in petroleum, chemical, light industry, commercial and scientific research departments. It is especially suitable for the measurement of industrial liquids such as crude oil, refined oil and light hydrocarbons. It is currently the latest generation of volumetric flowmeters in China. . The flow meter is equipped with a pointer, a word wheel counter, indicating the cumulative amount of flow, and can output electrical pulse signals for secondary instrument or computer detection, for automatic control and data processing.
Second, characteristics:
1, high measurement accuracy, wide flow range, good repeatability.
2, spiral rotor rotation, vibration, long life.
3, is not sensitive to changes in the measured liquid viscosity, especially for the measurement of higher viscosity liquids.
4, simple structure, small size, light weight.
5, easy to install.
Product working principle and structure:
First, the principle of work The flowmeter is a volumetric flowmeter, which is a closed cavity (shown as a shaded part) in the spiral groove (measurement element) and the inner wall of the metering box as a measurement room, the rotor every revolution The volume of the 8x cavity can be output. Therefore, the flow rate of the fluid is proportional to the rotation speed of the screw rotor, and the accumulated rotation number of the rotor is converted into the measurement of the fluid flow rate (see figure).
Second, the structure:
The flow meter is mainly composed of a body, a pair of spiral rotors, a magnetic coupling, a deceleration mechanism, an adjustment gear, a counter, and a transmission device. The number of revolutions of the spiral rotor is transmitted to the meter counter through a speed reduction mechanism composed of a magnetic coupling and a series of gears. Magnetic coupling consists of active magnetic steel and driven magnetic steel.
Product technical characteristics:
The main technical performance: 1 allow the basic error (%): ± 0.2, ± 0.5; 2 repeatability error (%): 0.2 is 0.07, 0.5 is 0.17; 3 allowable working pressure (Mpa): 1.6, 2.5, 4 6.4; 4 Measured medium temperature (°C): -10 to +60, -40 to +120, 100 to 200, 200 to 350; 5 Measured medium viscosity (Mpa·s): 0.1 to 200, 200 to 500 , 500 or more; 6 professional grade: dIIBT4 (Note: The factory's signal remote transmission flowmeter is divided into common type and professional type); 7 pipe flange standard: HG20592-90, JB/T79.1-9.4; 8 flowmeter The main material: stainless steel, cast steel, 316 (ie 0Cr17 Ni12 Mo2).
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