The balance flowmeter is suitable for almost all fluid measurements and is a revolution in fluid measurement technology. At present, the balance flowmeter has been widely used in petroleum, chemical, metallurgy, electric power, natural gas, and water treatment industries.
Balanced flowmeter is a new type of flowmeter newly developed in recent years. Based on the standard orifice plate, the four-hole circulation method is adopted, which greatly avoids the disadvantages of the standard orifice plate used in the field where the pressure loss is large and the forward and backward straight pipe segments need to be long. And in the measurement than the standard aperture plate has greatly improved the accuracy, the following gives you a detailed introduction to the advantages of the balance of the flow meter industrial measurement.
When the standard orifice flowmeter is used on site, the pressure loss is large, and the requirement for high straight pipe sections before and after is the main reason that restricts its development. However, due to its own structural problems, the balance flowmeter fundamentally realizes the conversion, and its pressure loss is the standard. About 1/4 of the orifice plate, the straight pipe segment requirement is only about 1D after the first 3D. Often at 1:3, and the on-site measurement range often exceeds this range, which in many cases also limits the application of the standard orifice plate. The range ratio of the balanced orifice flowmeter is approximately 20:1. In some cases, the upper limit flow is unlimited. The minimum Reynolds number can be less than 200, and the maximum Reynolds number is greater than 10 7; the beta value can be 0.25 to 0.90. .
Balanced flowmeter field measurement adopts a symmetrical porous structure, which can actually balance fluids and reduce eddy currents and vibrations. Compared with on-site measurement of orifice flowmeters, these advantages are only a few improvements. At the same time, a wide range of measurements has been taken and fundamental solutions have been made. The defect of differential pressure flowmeter is the upgrade of standard orifice plate.
The long-term stability of the balance flowmeter is good. Due to the significant reduction of its turbulent shear force, the direct friction between the medium and the throttling element is greatly reduced, the β value remains unchanged for a long time, and the entire instrument has no moving parts. Long-term stability. Second, it also has all the measurement advantages of the standard orifice, suitable for high temperature and high pressure measurement occasions, basically suitable for all field media measurements.
The balance flowmeter is a third-generation throttling device. It is a new type of flowmeter designed and invented by the NASA-Marshall Aeronautical Flight Center (NASA-MSFC) for the main engine liquid oxygen measurement of the space shuttle. To balance the flow meter. The measurement accuracy of this flowmeter is 5 to 10 times that of the conventional throttling device, the flow noise is reduced to 1/15, the permanent pressure loss is about 1/3, the pressure recovery is 2 times faster, and the minimum straight pipe section can be less than 0.5D. The moving parts are very convenient and simple to install and use, which can save the large straight pipe section and greatly reduce the energy consumption required for fluid operation. It is an energy-saving instrument with broad application prospects. Balanced flow meters rely on many advantages, and the occupation rate in the future industry will become more and more extensive.
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