Vortex flow meteris mainly used for flow measurement of industrial piping media such as gas, liquid, steam and other media. It is characterized by small pressure loss, large range and high accuracy, and is almost independent of fluid density, pressure, temperature and other parameters in the measurement of working condition volume flow. No movable mechanical parts, so high reliability and low maintenance. The vortex gas flow meter parameters are stable over time. The instrument adopts piezoelectric stress sensor with high reliability and can work in the operating temperature range of -25 ℃ ~ 320 ℃. There is an analog standard signal, but also digital pulse signal output, easy to use with computer digital system, is a relatively advanced, ideal flow meter.
1)Vortex gas oil flowmeter instrumentation is not suitable for installation in the strong vibration of the occasion is widely known to the applicant, but in the occasion of frequent changes in the magnetic field, vortex air flowmeter will be measured above the normal value of the signal output. It has been proven that in a gas-free field, when the vortex liquid flow sensor is in a changing magnetic field, the vortex flow sensor will sense an error signal at the moment of magnetic field change and output a normal signal when the change ends and the meter is in a stable magnetic field.
2) Coke oven gas will have moisture in the gas transmission process due to the high temperature and high humidity at the factory. The gas flow drives the water back and forth, thus creating a pulsating flow. Vortex air flowmeterin this fluid state when the output data is large or small control engineering network copyright, simply do not reflect the production conditions.
3) Due to the coke oven gas more impurities, easy to crystallize, impurities condensed in the sensing head, resulting in measurement misalignment. As the temperature rises, impurities evaporate, sensitivity increases and the signal is enhanced; conversely, it decreases. This creates data instability.
4) The vortex flowmeter wiring process is inaccurate, resulting in intermittent signals during transmission.
5) The vortex flowmeterground wire does not meet the specification requirements, so that the strong power in the 50Hz interference into, when the normal signal is higher than 50Hz output normal signal, the reverse will output the wrong signal.
How to maintain
1) In the vortex flow meter installation, connection process, should ensure the accuracy of each link, including the pre-installation inspection of the site, the installation process of the instrument wiring, system grounding wire and other aspects of the control engineering network copyright, so as to ensure the detection of real data and accurate output.
2) For the operation of the metering system can be used "double gui metering control engineering network copyright, comparison confirmation" method, as well as "alternative method" for the operation of the metering instrument failure confirmation and troubleshooting.
3) Periodically clean the vortex flow meter as a whole, if necessary, blow the sensor head part of the vortex flow meter to avoid the condensation of impurities at the sensor head. The addition of heat tracing devices to the meter section and the meter section during the cold season is also beneficial in reducing the condensation of impurities at the meter.
4) Regular drainage of pipes, especially the moisture in front of the straight pipe section, according to the specific situation, set up a person to discharge regularly, as far as possible to reduce the moisture in the measured pipe section, to maximize the exclusion of pulsations in the fluid.
5) Strengthen the vortex flow meter metering system data management, set up timed printing function, based on the print data combined with the production status of the instrument operation analysis.
The above information is provided by flow instrument manufacturer.
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