How to solve the unstable use of vortex flowmeter

Abstract: The information on how to solve the unstable use of the vortex flowmeter is provided by the excellent flowmeter and flowmeter manufacturers. Vortex flowmeter is a very versatile flow meter, which can be used in almost all gas, liquid and steam flowmeter measurement and control, mainly used for flow measurement of industrial pipeline medium fluids, such as gas, liquid, steam, etc. a medium. its characteristics. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is how to solve the article details when the vortex flowmeter is unstable. Vortex flowmeter is a very versatile flow meter, which can be used in almost all gas, liquid and steam flowmeter measurement and control, mainly used for flow measurement of industrial pipeline medium fluids, such as gas, liquid, steam, etc. a medium. It is characterized by small pressure loss, large measuring range, high precision, and is almost not affected by parameters such as fluid density, pressure, temperature, viscosity, etc. when measuring the volume flow of the working condition. No moving mechanical parts, so high reliability and low maintenance. The parameters of the meter can be stable for a long time, and it also has digital pulse signal output, which is easy to be used with digital systems such as computers. It is a relatively advanced and ideal flow meter. Generally speaking, after eliminating the quality problem of the flowmeter itself, most of them are problems of on-site installation. For common velocity flowmeters, the possible situations are: (1). Is the straight pipe section in front of the flowmeter long enough (generally It is 10 times the inner diameter of the pipe), and cannot contain elbows, bypass pipes or other impurities, flow blocking parts, etc. (2). Whether the flowmeter is installed upstream of the regulating valve. (3). Is there any vibration on site? (4). Whether the flow rate is too small to reach the lower limit of the measurement value of the flowmeter. The following flowmeter manufacturers give a specific example of a vortex flowmeter: when the vortex flowmeter is unstable in measuring coke oven gas, the output signal is unstable. The reasons are as follows: (1) The vortex flowmeter is not suitable for installation in The occasion of strong vibration is widely known to the users, but in the occasion of frequent change of the magnetic field, the vortex flow sensor will measure the signal output higher than the normal value. Practice has proved that in a field without gas flow, when the vortex flow sensor is in a changing magnetic field, at the moment when the magnetic field changes, the vortex flow sensor will sense an error signal and output, when the change is over, the instrument is in a stable magnetic field. , the meter will output a normal signal. (2) The coke oven gas has high temperature and high humidity when it leaves the factory, so there will be moisture in the gas transportation process. The gas flow drives the water to fluctuate back and forth, thus forming a pulsating flow. When the vortex flow sensor is in this fluid state, the output data fluctuates, which cannot reflect the production status at all. (3) The pressure line is not solid during the wiring process of the instrument, which causes the signal to be intermittent during the transmission process. (4) The ground wire of the instrument does not meet the requirements of the specification, so that the 50Hz interference in the strong current enters. When the normal signal is higher than 50Hz, the normal signal is output, otherwise, the error signal is output. (5) Since the coke oven gas has many impurities, it is easy to crystallize, and the impurities condense on the sensing head, resulting in inaccurate measurement. When the temperature increases, the impurities volatilize, the sensitivity increases, and the signal increases; on the contrary, it decreases. This results in data instability. The solution to the instability of coke oven gas measured by vortex flowmeter: (1) In the process of instrument installation and connection, it is necessary to ensure the accuracy of each link, including site inspection before installation, instrument wiring, system Ground wire, etc., to ensure that real data is detected and can be output accurately. (2) For the metering system in operation, it can be used“Double-track metering, comparison and confirmation”method, and“Alternative method”Confirm and eliminate the faults of the measuring instruments in operation. (3) The pressure transmitter regularly drains the pipeline, especially the water in front of the straight pipe section, and arranges a special person to discharge it regularly according to the specific situation. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'How to solve the unstable use of vortex flowmeter'

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