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『The use of vortex flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. Precautions for using vortex flowmeter?
The main problems in the use of street flow meters are: ① inaccurate instrument indication or constant inability to indicate; ② The indication has a large fluctuation range and cannot be read; ③ Accurate indication at high flow rates, but inaccurate indication at low flow rates; ④ When the flow rate changes, the instrument indication does not change. 2. Analysis and Solutions to the Main Problems of Spring Slippery 2.1 Selection Issues Some vortex flowmeters may have a larger instrument selection due to inaccurate data provided or changes in process conditions after design selection, resulting in poor performance. Therefore, in practical selection, it is advisable to choose a smaller diameter as much as possible to ensure that the fluid has sufficient flow velocity when passing through the vortex generator. That is, when the fluid flows in the pipeline, the Reynolds number of the fluid must be greater than 4000 to ensure that the energy generated by the vortex has sufficient strength. At the same time, when selecting, the temperature, density, and degree of dirt of the medium should also be considered, and appropriate instruments should be selected. 2.2 Installation issues<(1) Matching the inner diameter of the instrument with the inner diameter of the pipeline beyond the allowable range can cause significant measurement errors. To ensure the measurement accuracy of the instrument, it is necessary to ensure that the inner diameter of the instrument matches the inner diameter of the pipeline during installation. The ideal state is that the diameter of the flowmeter is completely equal to the inner diameter of the pipeline, but in reality, this state cannot be achieved
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(2) Requirements for missing search sections of inlet and outlet straight pipes. After the installation of the vortex flowmeter, it is necessary to ensure that the flow velocity distribution is uniform and stable, which is one of the primary conditions for the normal operation of the instrument. Therefore, during instrument installation, it is necessary to ensure that the inlet and outlet straight pipe sections have sufficient length to ensure uniform and stable fluid distribution through the meter body. When there is no sudden change in pipe diameter and secondary flow cannot be formed, the inlet straight pipe section must meet the requirement of not more than 10 × DN (pipe diameter) and the outlet straight pipe section must meet the requirement of not less than 5 × DN (pipe diameter). When the fluid flows through throttling and resistance elements such as elbows, reducers, valves, etc., strong fluid disturbance occurs, and longer straight pipe sections must be considered. The inlet straight pipe section is (15-18) × DN (pipe inner diameter). (3) The impact of improper installation position. While considering the convenience of inspection, maintenance, and viewing, installation in places with high vibration should be avoided. Due to the inability of vortex flowmeters to overcome the impact