Anti corrosion turbine flowmeter | Working principle of liquid turbine flowmeter | Ultrasonic flowmeter manufacturer installation

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What issues should be considered when selecting the diameter of a turbine flowmeter?

Construction type: The internal structure should use a reverse thrust turbine flowmeter.. Due to the reverse thrust structure, the impeller can be in a floating shape within certain flow limitations, with no contact points in the axial direction, resulting in no surface friction or wear, which can extend the service life of the bearing. According to the selection of pipeline connection methods, there are two types of flow meters: degree and vertical devices. The degree device and pipeline connection methods include flange connection, threaded connection, and clamp connection. Select flange connection for medium caliber; Use threaded connections for small-diameter and high-pressure pipelines; The clamping joint with jujube base is only suitable for low-pressure small and medium-sized pipe diameters; Vertical devices only require threaded connections. Select based on the situation and consider the effects of temperature and humidity. Natural gas metering should choose intrinsic safety type explosion-proof turbine flowmeter.

2. The working principle of liquid turbine flowmeter

The liquid turbine flowmeter uses a turbine for measurement.

. It first converts the flow rate into the rotational speed of the turbine, and then converts the rotational speed into an electrical signal proportional to the flow rate. This type of flowmeter is used to detect instantaneous flow and total cumulative flow, and its output signal is frequency, which is easy to digitize. The induction coil and permanent magnet in the picture are fixed together on the housing. When ferromagnetic turbine blades pass through magnetic flux, the Anti corrosion turbine flowmeter

magnetic resistance of the magnetic circuit changes, resulting in an induction signal. The signal is amplified and shaped by an amplifier and sent to a counter or frequency meter to display the total accumulated flow rate. Simultaneously, the pulse frequency is converted from frequency to voltage to indicate instantaneous flow rate. The rotational speed of the impeller is proportional to the flow rate, and the rotational speed of the impeller is proportional to the total amount of flow. The output of the turbine flowmeter is a frequency modulated signal, which not only improves the anti-interference ability of the detection circuit, but also simplifies the flow detection system. Its range ratio can reach 10:1, and the accuracy is within ± 0.2%. The time constant of a turbine flowmeter with small inertia and size can reach 0.01 seconds. Liquid turbine flowmeter is widely used in petroleum, organic liquids, inorganic liquids, liquefied gas, natural gas, and low-temperature fluids. The output signal of the turbine flowmeter is pulse, which is easy to digitize. Turbine flow meters have low pressure loss, anti-corrosion blades, and can measure viscous and corrosive media. Create a pulse signal that is inversely proportional to the flow rate. When the fluid reaches the end of the pipeline, the torsional angular velocity of the turbine displacement sensor is inversely proportional to the fluid flow rate Placing a turbine at the center of the pipeline will cause a change in the magnetic flux in the sensing coil. The sensing coil sends the detected magnetic flux periodic change signal to the preamplifier, and also sends the pulse signal to the frequency current conversion circuit, amplifying and shaping the signal to suppress the

Anti corrosion turbine flowmeter | Working principle of liquid turbine flowmeter

What issues should be considered when selecting the diameter of a turbine flowmeter?

2. The working principle of liquid turbine flowmeter

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