Turbine flowmeter classification (l) Classification by sensor structure l) The axial type (ordinary type) impeller shaft center coincides with the pipe axis and is the leading product of TUF. There is a full range of products (DN10-DN600) 2) The tangential impeller shaft is perpendicular to the axis of the pipe. The angle of attack of the fluid flow to the blade plane is about 90°, which is suitable for small-diameter micro flow products. 3) The rotation of the mechanical impeller directly or mechanically drives the mechanical counting mechanism to indicate the total amount of calculation. The measurement accuracy is slightly lower than that of the electric signal detection sensor. The sensor and the display device are integrated and are welcomed by users. 4) Downhole-specific type is suitable for underground operations and production of oil extraction. Measuring media includes mud and oil flow. The volume of the sensor is limited, and it must withstand high pressure, high temperature, and fluid impact. 5) The self-tuning double-turbine model can be used for natural gas and other gas flow measurements. The sensor consists of a primary and a secondary double impeller, and the flow characteristics of the two impellers can be used to automatically correct changes in flow characteristics. 6) The wide viscosity type expands the diameter of the upper cone and the lower cone on the basis of the Baud-type floating rotor pressure balance structure and increases the structural measures such as the viscosity compensating wing and the pressure-bearing blade, making the sensor suitable for high viscosity liquids such as heavy oil, Viscosity up to 30mm2/s 7) The plug-in type plug-in type flow sensor is composed of a measuring head, an inserting rod, an inserting mechanism, a converter and a meter body. (2) Classified by Measured Media l) Flowmeter liquid with TUF a. Ordinary type is suitable for measuring low viscosity (≤ 5mpa.s) liquid volume flow, nominal diameter is DN10 ~ DN600, accuracy class is 0.525 to 0.5 (high precision type is 0.15 using medium temperature is a 20 one +120 °C pressure is 6 . 3MPao b. Corrosion-resistant 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 °C, and the liquid temperature to be measured is limited by the temperature resistance performance of the detection coil. d. Low-temperature fluids can be measured down to 250 °C, used in liquid oxygen, liquid nitrogen and other fluids. e. High-viscosity liquids have a viscosity of 70 to 400 mPa·s. Generally, the larger the caliber is, the higher the viscosity is. With the same sensor, when the fluid viscosity increases, the lower limit of the linear flow rate increases, and the range decreases. 2) TUF for gas a. The common type measures the flow of clean gas with a nominal diameter of DN15 to DN350, a fluid temperature of 20+120 °C, a pressure of 2.5 to 10 MPa, and an accuracy class of 1. b. The gas type is suitable for use in LPG, artificial gas, natural gas, and liquefied petroleum gas, etc. It is possible to use an automatic oiler to lubricate and protect the bearings, to prevent impurities from entering moving parts, and to increase the service life. Most of the structure uses mechanical local display device, can also use optical fiber technology to output high-resolution pulse signal, diameter series DN25 a DN600, working pressure ≤ 10mpa, accuracy of soil 1% (or soil 0.5%) o (3) Classification by signal detection l) Permanent magnetic material embedded in the inductive sensor impeller. When the impeller and the permanent magnetic material rotate, the magnetic field alternately approaches and stays away from the detection coil outside the sensor body, and the induced electric potential of the coil changes, and the frequency signal of this period change is amplified and output. 2) The variable reluctance impeller blades or rims are made of a magnetically permeable material, and a sensor-external detection coil is equipped with a permanent magnet material. When the impeller rotates, the magnetic circuit formed by the permanent magnetic material in the coil, because the magnetically conductive blades are alternately approaching or moving away, the magnetic flux changes periodically, and the equivalent impedance of the coil also changes, and a continuous pulse wave is generated in the amplified circuit. . 3) Reed pipe (reed switch) The permanent magnet material embedded in the impeller (or other rotating element synchronized with it) periodically opens and closes the reed contact of the reed pipe outside the sensor surface, and this switching function makes Constant current (or constant voltage) sources generate electrical pulse signals. 4) Photoelectric Impeller The impeller or impeller-driven element rotates intermittently as the impeller rotates. The resulting optical pulse signal is converted into an electrical pulse signal. In recent years, optical fiber transmission has emerged, effectively improving the anti-interference ability. (4) Classification by sensor and pipe connection l) Flange-connected sensors are flanged to the pipe. Styling product flange standards according to national standards. The pressure is limited to 6.3MPa or less. 2) Threaded sensors are threaded to the pipe. Threads are available in both sealed and unsealed pipe threads and can withstand high pressures, but are not suitable for larger diameters. 3) The clip-on type sensor itself can not be blue, the two sealed end faces of the sensor are clamped by the upper flange of the pipe, but it is not suitable for higher pressure and larger diameter. (5) easy to install by flow direction 1) The unidirectional type only allows the fluid to flow from one direction to the human sensor, so there is a possibility of backflow where a check valve is required. 2) Two-way sensors allow fluids to flow in both “positive†and “inverse†directions. There are at least two signal detectors. The flow meter can identify the phase of the signal. Cumulative amount uses “plus†or “minus†to deal with the total amount of “positive†or “inverse†flow in both directions. For example, TUF for submarines Sensor structure: The TUF sensor consists of a body, a guide body (guide), an impeller, a shaft, a bearing and a signal detector. Http:// Bag Filters,Bag House Filter,Micron Filter Bags,Bag Filter Dust Collector ANPING HANKE FILTER TECHNOLOGY CO , https://www.anpinghankefilter.com