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What are the measurement ranges of vortex flowmeters?
1、 Vortex flowmeter is a flowmeter based on the Karman vortex principle for measurement. It can measure liquids and gases, and is also very economical. The diameter is generally DN10-- DN1000. With temperature and pressure compensation, it can accurately measure gas or steam flow, and has a wide range of applications;
2、 Vortex flowmeter can only measure volumetric flow rate, usually in m3/h (cubic meters per hour), with instantaneous flow display and cumulative flow display;
3、 The measurement range corresponding to electromagnetic flow meters of different diameters is: liquid measurement: (unit: m3/h): DN15
1.2-6; DN20
1.5---10； DN25：2---16； DN32
1.8---20； DN40：2.5---25； DN50：3.5---40； DN65：7.5---70； DN80：12---130； DN100：18---160； ..... Gas measurement: (unit: m3/h): DN15:4--28; DN20：6---40； DN25：8---50； DN32：15---150； DN40：18---180； DN50：25---480； DN65：50---500； DN80：80---800； DN100：120---1200； ..... For more detailed information, please refer to the technical article on the website of Shandong Qiangqiang Automation Technology Co., Ltd.... Www.qszdh.com
2.1 minutes to understand the working principle of vortex flowmeter
The working principle of vortex flowmeter is based on the "Karman vortex street" principle. The following is a detailed explanation of its working principle:
First, the basic principle of the vortex flowmeter is a fluid oscillation type flow meter developed based on the "Karman vortex street" principle, which has excellent technical performance indicators. When fluid flows through a non streamlined cylindrical object (vortex generator) inserted into the
2. The relationship between vortex separation frequency and flow velocity. The frequency f of vortex separation can be expressed by the following formula: f=St × V/d, where f is the vortex separation frequency; St is a dimensionless constant (Strouhal number), which is a function of Reynolds number Re within a certain flow range for a specific type of vortex generator; V is the average flow velocity of the fluid inside the pipeline; D is the width of the upstream face of the cylinder; D is the inner diameter of the sensor housing (this parameter is not directly reflected in the formula, but affects the relationship between St and Re). By detecting the separation frequency f, the fluid flow velocity and instantaneous flow rate can be measured.
III. Calculation of Instrument Coefficient The number of pulses generated by the flow of fluid through a sensor per unit volume is called the instrument coefficient, represented by K. The instrument coefficient K can be calculated using the following formula: K=N/Q, where K is the instrument coefficient; N is the number of pulses; Q is the volume of the fluid. Four shirt chains, signal detection, and the principle of dealing with major problems: vortices alternate and separate on both sides behind the cylinder, generating pressure pulsations and subjecting the detection object (also known as the probe) in the sensor to alternating forces. The piezoelectric crystal element embedded in the detection body generates a charge frequency si