The scale of the vortex flowmeter selection

Abstract: the selection of vortex flowmeters scale information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. As a new type of flowmeter, vortex flowmeter developed rapidly since the mid - 80 - s, it has many advantages and strengths in flow measurement, more and more widely applied in modern flow measurement. In the domestic use of vortex flowmeter in flow measurement also. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the article details in the selection of vortex flow meter scale. As a new type of flowmeter, vortex flowmeter developed rapidly since the mid - 80 - s, it has many advantages and strengths in flow measurement, more and more widely applied in modern flow measurement. In the domestic use of vortex flowmeter in flow measurement will become more and more attention, at present our country has good performance and has independent intellectual property products. Vortex flowmeter is developed based on the fluid vibration, according to different vortex, the detection methods developed gradually from a hot wire type, thermal stress, magnetic susceptibility and differential switch capacitance type, ultrasonic type, etc. Vortex flowmeter can be used for almost everything can form vortex column occasions, not only can be used in a closed pipe, can also be used to open the groove. Compared with the turbine flowmeter, vortex flowmeter without moving mechanical parts, maintenance workload small, instrument constant stability; Compared with the orifice plate flowmeter, vortex flowmeter measurement range, small pressure loss, high accuracy, simple installation and maintenance. But the environment related parameters of vortex flowmeter is more, easy to be ignored at the scene of the use and influence the properties of flowmeter play correctly. Measuring principle of vortex flowmeters are in the pipeline flow meters, set up a stagnation, when the fluid flows through stagnation pieces, due to the effect on the surface of the viscous flow of viscous flow, in its downstream will produce two columns of asymmetric vortex, the vortex in the stagnation of suitability, apart form the so-called Carmen ( Karman） Spiral columns, two columns of spiral direction of rotation is opposite, Carmen is theoretically proved that h/L = 0. 281 ( H as the width between the two spiral columns, L is the distance between two adjacent vortex) , the spiral column is the stability of the Reynolds number Re is characterization of viscous fluid flow characteristics of a dimensionless number, its physical meaning is the ratio of inertia force and viscous force of fluid flow. Therefore, the flow of the fluid to the use of vortex street flowmeter has a certain influence. If the environment parameters on the fluid flow state has influence also affects the use of vortex street flowmeter performance. Through the practice, the following several aspects have influence on the use of vortex flowmeter, cope with these problems are analyzed. Vortex flowmeter measurement range is larger, generally 10:1, but measure the lower limit restricted by many factors: Re > 10000 is zui basic condition of vortex street flowmeter work, in addition to this, it is also restricted by vortex energy, medium flow rate is low, the vortex intensity, the rotational speed is low, difficult to cause the response signal sensors, vortex frequency f is also small, still can make the signal processing difficulty. Measurement limit is affected by the frequency response of the sensor, Such as magnetic susceptibility is generally not more than 400 hz) And circuit of the frequency limit, so the design must to calculate velocity range, business accounting, undertake choosing according to fluid flow. Using the complex environmental conditions on site, type selection in addition to pay attention to the environmental conditions such as temperature, humidity, atmosphere, but also electromagnetic interference. In strong interference such as transmission power stations, large rectifier, magnetic sensitive type, such as type piezoelectric stress meter cannot work normally or not accurate measurement. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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