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V-Cone
發布時間：2013-08-06
Trait
Specifications: XGL-VZ Description: XGL-VZ Series V cone flowmeter is a new variety of Reynolds number can accurately measure high-precision flow meter, can meet a variety of media application conditions require its operating principles with each other types of pressure on the same principle, are based on containment piping energy conservation theorem, V cone flowmeter Due to the unique design of the structure, and thus better performance.
Parameters
Saying V cone flowmeter is at the center of the pipe hanging a conical orifice, tapered piece impede the flow of media, reshaping velocity curve of the cone creates a low pressure area immediately downstream of the pipe upstream of the pressure by the same after throttling orifice downstream of a negative pressure differential between the positive and negative pressure with pressure taps out, pressure port is located upstream of the pipeline, the negative pressure port is located on the end of the cone, by measuring both the between the differential pressure, according to Bernoulli's equation to calculate the flow in the pipe, the cone in the pipeline center, the measured flow rate curves to optimize the media , and therefore high accuracy of the meter, the downstream straight pipe requirements low.
V cone flowmeter to measure a variety of conditions ( temperature and pressure ) under the conditions of gas, mixed gas, liquid, multiphase fluid, the gas-liquid two-phase ( moisture, liquid mass ratio of ≤ 5%) , powders, high viscosity, high velocity, dirt, liquid containing solid particles in suspension, solution, vibration, electromagnetic interference, medium flow. Fluid from the cryogenic conditions to a supercritical state. Operating temperature up to 850 ℃ , the maximum pressure 42.0MPa . If using the special structure of the material, temperature and pressure can be higher. Measurable highest Reynolds number 500 million, the lowest Reynolds number 8000 or even lower. Full-scale differential pressure signal generated from the lowest less than 0.1 kPa kPa to the highest scores.
Flange pressure type V cone flowmeter (VF) , using solid cone closure body and the wall with the flange pressure, coupled with remote differential pressure transmitter, which can effectively prevent the clogging of the pressure taps, suitable for medium containing solid particles of dust, high viscosity liquids and dirty media.
V-cone flowmeter works
V cone flowmeter is a differential pressure type flow meter. To differential pressure flow meter design principles have been applied with a hundred years of history, the differential pressure type flowmeter is sealed pipeline based energy conversion principle, ie to stabilize the fluid pressure pipeline medium velocity in the pipeline is inversely proportional to the square root of : speed increases pressure drop, when the medium close to the cone, a pressure of P1, through the medium of the throttle cone zone, the speed will be reduced to increase the pressure P2 , Figure 1 shows, P 1 and P2 through the V -cone flowmeter taps followed lead to differential pressure transmitters, flow rate changes, V -cone flowmeter two differential pressure between the pressure taps will increase or decrease the value of . When the flow rate is the same, if the cutting area, the resulting differential pressure is large, betavalue is equal to the cone area divided by throttling the cross-sectional area of the pipe diameter ( between the two can be converted into a smaller diameter than ) .
V cone flowmeter performance characteristics
V -Cone flowmeter is a differential pressure type flow meter, the theory is based on the law of conservation of energy in closed conduits - Bernoulli's equation and the flow continuity equation, in the case of steady flow, pipeline The flow rate is proportional to the square root of the differential pressure.
Measurement stability, flow coefficients remain fairly constant.
High accuracy, good repeatability, enabling accurate measurement of flow.
Range than the width, not the secondary instrument software correction can be achieved by 10 : 1 .
Install straight pipe requirements for low pressure loss.
Adaptability of the measured medium can be measured non-clean fluids, fluids containing solid particles, low pressure fluid, gas and a variety of high moisture Dirty fluids.
Flow element has a self-cleaning function, resistance to wear.
V cone flowmeter technology parameter
uncertainty: ± 0.5 %
Repeatability: ± 0.1 %
range ratio: 10 : 1 can also be wide
installation straight pipe length: Upstream 1 ~ 3D downstream 0 ~ 1D
Reynolds number range: 5 × 103 ~ 1 × 107 caps can be higher, lower limit can be lower.
Pipe diameter DN15 ~ DN1600 can also provide greater DN1600 Product
PN: ≤ 40Mpa
V cone flowmeter flow measurement system configured
to show the whole micro-power meter that
shows the overall style remote instrument, in situ
split remote meter
cone tube with any other transmitter unit configuration
V cone flowmeter prospect
I plant the XGL-VZ Series V cone flowmeter, its superior performance in industrial production in the high flow, low pressure, high moisture gas and coke oven gas, natural gas and other fluid Dirty measurements, will play an important role on the current use of the general flow throttling device and some other instruments, and in particular need to improve the measurement accuracy, improved measurement of the effect of the occasion, factory production of V -cone flowmeter is ideal for replacement .