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『DN100 Vortex Flow Meter』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
1. How is the flow rate displayed by the flowmeter calculated?
The flowmeter measures fluid flow rate or volume change through different principles, and the final calculation result is combined with unit time to form flow data.. Flowmeters can be classified into three types based on their class balance and filial piety. The core calculation logic can be divided into velocity correlation method, volume accumulation method, and fluid characteristic analysis method. Below is a specific explanation:
1. Velocity velocity correlation method. This type of equipment measures the fluid motion velocity and calculates the instantaneous flow rate by combining it with the flow cross-sectional area.
1. Electromagnetic flow meters measure the induced electromotive force generated by conductive liquids in pipelines based on Faradays law of electromagnetic induction. When the flow rate of the conductive liquid is v and the diameter D is known, the flow formula is Q=π D ² v/4. For example, when a flow rate of 2m/s is measured in a DN100 pipe, the flow rate is approximately 15.7m ³/h
2. The vortex flowmeter detects the separation frequency f behind the vortex generator and infers the flow rate based on the calibration parameter K. The calculation formula is Q=f/K. When the coefficient of a certain model of instrument is K=650 pulses/m ³, a flow rate of 3.85m ³/h is measured at 2500Hz.
2. Volume and Volume Accumulation Method Mechanical measurement accumulates the total amount through continuous filling and discharge of the chamber.
1. The volume V0 of each chamber of the elliptical gear flowmeter is fixed, and the gear rotation speed n is calculated by a photoelectric sensor. The monthly accum
III. Fluid Characteristics Analysis Method: Using the changes in physical properties during fluid flow, a mathematical model is established.
1. The differential pressure blocking flowmeter obtains mass flow rate based on Bernoulli equation, Δ P differential pressure measurement, and parameter compensation.
. Formula Qm=0.01252C ε d ² √ (Δ P ·ρ), when the aperture ratio β of the orifice plate is 0.6, the measured differential pressure is 10kPa, and the density is 1000kg/m ³, the flow rate is about 12.5m ³/h2. The ultrasonic time difference method can calculate the flow rate by calculating the time difference Δ t between forward and backward ultrasonic propagation, the flow velocity v=D Δ t/(2Lcos θ), and the pipeline length L is known. When the DN200 pipe is installed at a 45 ° angle and the time difference is 0.02ms, the corresponding flow velocity is 1.2m/s, and the flow rate is about 135m ³/h. Can DN100 vortex flowmeter measure liquefied natural gas?
It can be measured with a temperature and pressure compensation, but it is still recommended to use a gas turbine flowmeter and a vortex generator.. Slightly higher accuracy and wider flow range.
3. What are the measurement ranges of vortex flowmeters?
1、 Vortex flowmeter is a flowmeter based on the Karman vortex principle for measurement. It can measure liquids and gases, and is also very economical. The diameter is generally DN10-- DN1000. With temperature and pressure compensation, it can accurately measure gas or steam flow, and h