Abstract: The composition and structure information of the
turbine flowmeter meter sensor is provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Classification of turbine flowmeters (l) Classification by sensor structure l) Axial type (ordinary type) The center of the impeller shaft coincides with the axis of the pipeline, which is the leading product of TUF, with a full range of products (DN10-DN600) 2) Tangential type impeller shaft Perpendicular to the pipe axis, fluid. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the composition and structure of the turbine flowmeter sensor. Classification of turbine flowmeters (l) Classification by sensor structure l) Axial type (ordinary type) The center of the impeller shaft coincides with the axis of the pipeline, which is the leading product of TUF, with a full range of products (DN10-DN600) 2) Tangential type impeller shaft Perpendicular to the axis of the pipe, the angle of attack of the fluid to the plane of the blade is about 9 0°, suitable for small-diameter micro-flow products. 3) The rotation of the mechanical impeller drives the mechanical counting mechanism directly or through magnetic coupling, indicating the total amount, and the measurement accuracy is slightly lower than that of the electrical signal detection sensor. The sensor and the display device are integrated, which is welcomed by users. 4) Downhole special type It is suitable for downhole operation and production and transportation of oil exploitation. The measurement medium includes mud and oil flow, etc. The volume of the sensor is limited, and it needs to withstand high pressure, high temperature and fluid impact. 5) Self-calibrating twin-turbine type It can be used for the flow measurement of natural gas and other gases. The sensor is composed of main and auxiliary double impellers, and the change of flow characteristics can be automatically corrected by the speed difference of the two impellers. 6) The wide-viscosity type expands the diameter of the upper cone and the lower cone on the basis of the pressure balance structure of the Porter type floating rotor, and adds structural measures such as viscosity compensation wings and pressure-bearing blades, so that the sensor is suitable for high-viscosity liquids, such as heavy oil, The viscosity can reach 30mm2/s7) The plug-in type flow sensor is composed of measuring head, plug-in rod, plug-in mechanism, converter and meter body. (2) Classify according to the measured medium l) TUFa for flow meter liquid. The ordinary type is suitable for measuring low viscosity (≤ 5mpa.s) liquid volume flow, the nominal diameter is DN10 ~ DN600, the accuracy level is 0.25-0.5 (the high-precision type is 0.15, the medium temperature is -20-+120 ℃, the pressure is 6.3MPaob. Corrosion resistance The type is suitable for corrosive fluids, such as dilute sulfuric acid, dilute hydrochloric acid, dilute nitric acid, etc., generally only small-diameter products (DN20-DN50). c. The high-temperature type is suitable for the liquid temperature below 300 ℃, and the temperature of the liquid to be measured is subject to the resistance of the detection coil. Limitation of temperature performance. d. The low temperature type of the measured fluid can be as low as -250 ℃, and it is used in the measurement of liquid oxygen, liquid nitrogen and other fluids. e. The high viscosity type is suitable for liquid viscosity up to 70 to 400mpa· s , usually the larger the diameter, the higher the viscosity. For the same sensor, when the viscosity of the fluid increases, the lower limit of the linear flow rate will increase, while the range will be reduced. 2) TUFa for gas. Ordinary type Measuring the flow of clean gas, the nominal diameter is DN15-DN350, the fluid temperature is -20+120 ℃, the pressure is 2.5-10MPa, and the accuracy level is level 1. b. Gas type is suitable for petroleum gas, artificial gas, natural gas and liquefied petroleum gas, etc. The automatic oiler can be used to lubricate and protect the bearing, prevent impurities from entering the moving parts, and prolong the service life. Most of the structure adopts mechanical local display device, and optical fiber technology can also be used to output high-resolution pulse signal. The caliber series is DN25-DN600.≤ 10mpa, the accuracy is ±1% (or ±0.5%) o(3) Classification according to the signal detection method l) The inductive sensor impeller is embedded with permanent magnetic material. When the impeller and the permanent magnetic material rotate, the magnetic field alternately approaches and moves away from the detection coil outside the sensor surface, the induced potential of the coil changes with it, and the periodically changing frequency signal is amplified and output. 2) The variable reluctance impeller blade or rim is made of magnetic conductive material, and the detection coil outside the sensor surface is equipped with permanent magnetic material. When the impeller rotates, the magnetic circuit formed by the permanent magnet material in the coil, due to the alternating approach or distance of the magnetic conductive blades, the magnetic flux changes periodically, the equivalent impedance of the coil also changes, and a continuous pulse wave is generated in the amplifying circuit . 3) The permanent magnetic material embedded in the impeller (or other rotating elements synchronized with it) periodically opens and closes the reed contacts of the reed pipe outside the sensor body, and this switching function makes the A constant current (or constant voltage) source generates electrical pulse signals. 4) Photoelectric impeller blades or components driven by the impeller rotate with the impeller to periodically block the light beam, and the generated optical pulse signal is converted into an electrical pulse signal. In recent years, optical fiber transmission has emerged, which effectively improves the anti-interference ability. (4) Classification according to the connection method between the sensor and the pipeline l) Flange connection type The sensor is connected to the pipeline in a flanged way. Flange standards for shaped products are based on national standards. The pressure is limited to 6.3MPa or less.
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