Wedge flowmeter is a new type of flowmeter that is gradually becoming practical. It is a differential pressure generating device used by Hongpei Measurement and Control Company (HP) to measure flow.
summary:
The detection component is a V-shaped wedge block (also known as a wedge-shaped throttling component), with its smooth top angle facing downwards, which is conducive to the smooth passage of liquids or viscous liquids containing suspended particles, without causing stagnation on the upstream side of the throttling component. Therefore, it is particularly suitable for measuring volumetric and mass flow rates in industries such as petroleum and chemical.
Measurement principle:
When a fluid passes through a wedge flowmeter, due to the throttling effect of the wedge block, a differential pressure proportional to the square of the flow rate is generated on its upstream and downstream sides. This differential pressure is drawn out from the pressure ports on both sides of the wedge block and sent to the differential pressure transmitter for conversion into an electrical signal output. After being calculated by a dedicated intelligent flow rate calculator, the flow rate value can be obtained.
Wedge flowmeter flow equation:
Cε πD2 2ΔP
qv= m
1-m2 4 ρ
In the formula: qv - fluid flow rate, m3/s
C - outflow coefficient;
ε - coefficient of expandability;
πD2
M - ratio of opening area to pipeline area, S1/——
4
S1- Bow shaped circulation area, m2
D - Inner diameter of pipeline, m；
Δ P - differential pressure, Pa
ρ - density of the measured medium, kg/m3
Main features:
1. Good repeatability and high accuracy, the calibrated wedge flowmeter has an accuracy of 0.5 level.
2. It has self-cleaning ability and no stagnant area.
3. Wear resistant, long lifespan, and high reliability.
4. The permanent pressure loss is smaller than that of the orifice plate.
5-type structure, on-site installation does not require the installation of pressure pipelines, and can be directly connected to the pipeline with threads or flanges. Construction is time-saving, labor-saving, and easy to maintain.