Shanxi orifice flowmeter | Doppler flowmeter manufacturer

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1. What is the principle of orifice flowmeter

2. Doppler flowmeter manufacturer

3. Orifice flowmeter

Classification: Education/Science>>Science and Technology>>Engineering Technology Science Problem Description: Who can explain the knowledge related to orifice flowmeter? Thank you. Analysis: Hehe Chemical Principles. The structural principle of orifice flowmeter is that an orifice plate is installed on the pipeline, and pressure measuring tubes are connected on both sides of the orifice plate, which are respectively connected to U-shaped differential pressure gauges. Orifice flowmeter utilizes the throttling effect of fluid passing through sharp holes to increase flow velocity and decrease pressure, resulting in a pressure difference before and after the orifice plate, which serves as the basis for measurement. If the diameter of the pipeline is d1, the diameter of the sharp hole in the orifice plate is d0, the diameter of the constriction formed by the fluid flowing through the orifice plate is d2, and the fluid density is ρ, the velocity and pressure at the interface I and II, that is, the pressure measuring conduit in front of the orifice plate and the constriction are u1, u2 and p1, p2, respectively. According to the Bernoulli equation, without considering energy loss, it can be obtained that: (u22-u12)/2=(p1-p2)/ρ=gh or (u22-u12) 1/2=(2gh) 1/2. Due to the variation of the constriction position with the flow velocity, the cross-sectional area S2 is difficult to know, while the area of the orifice is known. The position of the pressure measuring port is also known after the equipment is manufactured. No change, therefore, u0 at the rolling diameter of the orifice plate hole is used instead o

f u2, taking into account the energy loss caused by local resistance of the fluid, and corrected with a correction coefficient C. Then there is: (u02-u12) 1/2=C (2gh) 1/2. For incompressible fluids, according to the continuity equation, there is: u1=u0S0/S1. After sorting, we can obtain: u0=C * (2gh) 1/2/[1- (S0/S1) 2] 1/2. Let C0=C/[1- (S0/S1) 2] 1/2, which can be simplified as: u0=C0 (2gh) 1/2. The volumetric flow rate of the fluid can be calculated based on u0 and S2: Vs=u0 * S0=C0 * (2gh) 1/2 [m3/s] or Vs=C0 * S0 * [2GR (ρ r - ρ)/ρ 1/2 [m In equation 3/s: the reading of the R-U differential pressure gauge, [m]； ρ r - the density of the indicating liquid in the differential pressure gauge, [kg / m3]； C0- Orifice flow coefficient, which is determined by the shape of the orifice plates sharp hole, the position of the pressure gauge, the ratio of the aperture to the diameter, and the Reynolds number. The specific value is determined experimentally. When d1/d2 is constant and Re exceeds a certain value, C0 approaches the constant value. Generally, standardized orifice flow meters in industry are used under flow conditions where C0 is the constant dispersion number. Take a look at the animation below, I believe it will be helpful to you 210.41.4.20/Maebeis course/29/%CD%F8%C2%E7%BF%CE%B3%CC%CD%F8%D5%BE%CE%C4%BC%FE/11/flash/kongban.swf

4. The difference between orifice flow meter, Venturi flow meter, and rotor flow meter is that orifice flow meter, pitot tube, Venturi flow meter, and rotor flow meter are all tools used to measure flow rate. However, there are some differences in their working principle, scope of application, measurement accuracy, and service life due to chain cracking. 1. Working principle: The orifi

Shanxi orifice flowmeter | Doppler flowmeter manufacturer

1. What is the principle of orifice flowmeter

2. Doppler flowmeter manufacturer

3. Orifice flowmeter

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