Integrated vortex flowmeter| Jiuquan ultrasonic flowmeter manufacturer

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1. What is an integrated vortex flowmeter?

All vortex flowmeters are based on the Karman vortex principle. Karman vortex is a phenomenon observed and studied by Hungarian American scientist von Karman in 1911: when a fluid passes over a non fluid linear object, paired, alternately arranged, and twisted anti symmetric vortices are generated on both sides of the objects wake.. The generation of this vortex has a periodic and alternating nature, and the frequency of variation is proportional to the fluid velocity, which is known as the Karman vortex street phenomenon. A vortex flowmeter is a flowmeter that utilizes the properties of this phenomenon to determine the velocity or flow rate of a fluid by measuring the shedding frequency of vortices. After understanding the principle of vortex flowmeter, one should also know how to use it well. After selecting a vortex flowmeter, the first issue to face is the installation of the vortex flowmeter. So what should be noted during installation? (1) The flowmeter should be installed horizontally or vertically on the pipeline corresponding to the engineering passage. Due to the characteristics of vortex flowmeters, in order to achieve accurate measurement, attention must be paid to ensuring slow tube measurement. Therefore, vortex flowmeters installed on horizontal pipelines should generally be selected and installed at very low positions in the pipeline. When installed on vertical pipelines, the flow direction of the fluid should be from top to bottom. (2) When using a vortex flowmeter for flow regulation, special attention should be paid to installing the flow regulating valve behind the flowmeter. Otherwise, jet flow is prone to occur at low flow rates, and the phe

nomenon of flow stopping and valve opening being inversely proportional during flow regulation may occur. (3) The vortex flowmeter has very strict requirements for the front and rear straight pipes. The upstream of the flowmeter should ensure a diameter of 10 to 40 times the pipeline diameter, and the downstream should not be less than 5 times the pipeline diameter. The length of the upstream straight pipe depends on whether there is a right angle bend, expansion or reduction pipe in the upstream. It is particularly important to note that, while meeting the requirements, the flow meter should be installed as much as possible in the pipeline position with the largest possible straight pipe section before and after the installation in Kuibi Town. (4) The temperature/pressure measurement point for measuring temperature and pressure should be set at 5 times the diameter of the outlet of the vortex flowmeter. (5) When installing a vortex flowmeter, strong vibrations and power frequency interference signals should be avoided as much as possible. If these situations cannot be avoided, measures such as shock absorption and shielding should be taken to minimize interference. (6) In high-temperature pipelines, vortex flowmeters must be installed vertically downwards. How should the vortex flowmeter be maintained after installation and implementation? The vortex flowmeter has no movable parts, so the maintenance workload is relatively low under normal use. The mission of daily maintenance is to check whether the accumulated instrument indications are normal; Check if the instrument power supply is normal; Check if the instrument body connectors are damaged or corroded; Check for damage and corrosion in the external wiring of the in

Integrated vortex flowmeter

1. What is an integrated vortex flowmeter?

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