Insertion V-cone flowmeterIt is a novel differential pressure flowmeter composed of a V-cone flow sensor and a differential pressure transmitter. Compared to pipeline V-cone flow meters, it is suitable for measuring flow in large-diameter pipelines and is more cost-effective.
Although differential pressure flow meters represented by orifice plates, nozzles, Venturi tubes, and averaging tubes have undergone a long development process and made important contributions to flow rates at a certain period of time, people always feel a bit regretful when using these flow sensors because they have not solved a series of problems such as low accuracy, narrow measurement range, easy wear, high on-site installation conditions, and inability to measure mixed phase flow, dirty flow, etc. In view of this, many flow experts at home and abroad are committed to the research and development of new differential pressure flow sensors to make up for the shortcomings of orifice plates, nozzles, Venturi tubes, and averaging tubes. Various special throttling elements are emerging one after another, and V-cone flow sensors are among the best. It also uses throttling effect to measure flow rate. Compared with other throttling fluids, it changes the throttling layout from traditional center hole throttling to annular throttling. That is, the V-cone sensor uses a streamlined cone suspended at the center of the pipeline to gradually contract the fluid to the inner wall of the pipeline. This novel throttling effect makes it have self rectifying, self-cleaning, and self-protection characteristics. From a large number of actual on-site usage situations, the flow measurement effect of the V-cone sensor is better than other differential pressure sensors. It opens a new page for the use of differential pressure flow meters.
Characteristics of plug-in V-cone flowmeter
★ Unique V-cone
The unique physical structure of conical throttling not only expands the measurement range of medium flow rate, but also has a special structure for fluid rectification, so the requirements for straight pipe sections in the process are very low.
★ Leading manufacturing technology
Accuracy can reach ± 0.5%, repeatability can reach ± 0.1%, and range width ratio is 10:1.

★ Low requirements for straight pipe sections
Upstream straight pipe: 0-3D, downstream straight pipe: 0-1D.

★ Long term stability
Due to the shape of the V-cone being a contracting fluid that does not impact the abrupt surface, the β edge will not be contaminated
Due to fluid wear, the instrument coefficient remains constant, and the V-cone flow sensor has good long-term stability performance.

★ Low voltage loss
Its pressure loss is 1/3-1/5 of the orifice plate; The signal is stable, and the signal fluctuation is 1/10 of that of the orifice plate.

working principle
The working principle of the plug-in V-cone flowmeter is basically the same as that of the pipeline V-cone flowmeter, except for differences in structure and appearance. The former is installed in the form of pipeline openings, which can save costs and is therefore suitable for measuring flow in larger diameter pipelines.
It is throttled by hanging a conical body at the center of the pipeline. Due to the ideal flow velocity distribution in pipelines, the flow velocity is close to zero at the pipe wall, increases towards the center of the pipeline, and reaches its maximum at the center of the pipeline (because the frictional force on the pipe wall reduces the velocity of the fluid flowing through it). So when the fluid flows through a V-cone flowmeter, the cone directly interacts with the high-speed center of the fluid, forcing the high-speed center to homogenize with the low-speed fluid near the pipe wall, thereby generating the correct differential pressure, which is more useful in low flow rate measurements. However, other differential pressure flow meters with central openings (such as orifice plates) cannot measure fluids with low flow rates (too low Reynolds numbers) due to the lack of this function.
All differential pressure flow measurements are based on an ideal fluid state, but due to the vast differences in actual on-site conditions, this ideal state rarely exists. Any changes in pipeline installation, such as bends, valves, reducing or expanding diameters, pumps, tees, etc., can disrupt the ideal flow field, making it difficult for general flow meters to obtain accurate measurement values in disturbed flow fields. And the V-cone overcomes these drawbacks, due to its unique design, the shape and position of the cone rearrange the upstream velocity distribution, idealizing the flow field and achieving accurate measurement values. Practice has shown that even under extremely harsh installation conditions (such as two bends on different planes immediately upstream of the cone), a V-shaped cone can make the fluid velocity distribution flat and symmetrical, thereby ensuring measurement accuracy.

Application of plug-in V-cone flowmeter
Detecting gas flow rate
Gas: Coke oven gas, blast furnace gas, city gas
Natural gas: including natural gas with a moisture content of 5% or more
Various hydrocarbon gases: alkanes, alkenes, and other gases
Production of various gases: hydrogen, helium, argon, oxygen, nitrogen, etc
Corrosive gases: wet chloride gases, etc
Air: including air containing water, dust, compressed air, etc
Flue gas: flue gas emitted from various boilers and heating furnaces