1.LGV V-cone flow meter carries on a lot of experimental research according to different equivalent diameter ratio and different front and rear cone angles, and finally determines the optimal combination of front and rear cone angles under different diameter ratio, which makes the range ratio wider and the measurement accuracy higher.
2.The method of cone fixation with support is adopted, which makes the cone fixation very firm and reliable, and reduces the influence of cone vibration on measurement. At the same time, the influence of the front and rear support on the flow field is also fully considered. Ensure the measurement accuracy.
3.The influence of coefficient of expandability ε on gas flow measurement is fully considered in the design of LGV V-cone flow meter. The real flow experiment of expansion coefficient is carried out by using the standard device of gas flow rate of sonic nozzle with positive pressure method.
4.With a wide range, LGV V-cone flow meter is throttled based on the gradual contraction mode of the side wall, which makes the vortex interference in the whole negative pressure region well suppressed, and the measurement effect on the static pressure becomes very small, even in a very small flow state, a very high signal-to-noise ratio can be obtained, so that the measurement can be carried out normally.
5.LGV V-cone flow meter has a special sidewall throttle structure, which has the function of rectifying the fluid flow state, so it only needs very short straight pipe section, the first 3 D and the second 2 D.
6.Small pressure loss which is beneficial to energy saving. The structural characteristic of LGV V-cone flow meter is streamlined throttle, so its pressure loss is small (about 1/3 of the orifice plate), so it has a great advantage to measure the flow rate of those low pressure and large flow fluids.
7.LGV V-cone flow meter has the boundary layer effect formed by the special structure, so that the key parts of the throttle will not be worn out, so it can keep the geometry constant for a long time and it can work stably for a long time without calibration. Meanwhile, the flow meter has no movable parts (without any electronic devices), it is a pure mechanical body, so it is resistant to high temperature, high pressure, corrosion and vibration.
