How to clean the electrode of the electromagnetic flow meter smartly

Abstract: The information on how to clean the electrodes of electromagnetic flowmeters ingeniously is provided by excellent flowmeter and flowmeter manufacturers. Electromagnetic flowmeter electrode cleaning methods are as follows: 1. Electrochemical method Electrochemical phenomenon exists in the metal electrode in the electrolyte fluid. According to the principle of electrochemistry, there is an interfacial electric field between the electrode and the fluid, and the interface between the electrode and the fluid is the electrode/fluid interphase. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of how to clean the electrodes of electromagnetic flowmeters ingeniously. Electromagnetic flowmeter electrode cleaning methods are as follows: 1. Electrochemical method Electrochemical phenomenon exists in the metal electrode in the electrolyte fluid. According to the principle of electrochemistry, there is an interfacial electric field between the electrode and the fluid, and the interface between the electrode and the fluid is caused by the electric double layer existing between the electrode/fluid phase. The study of the electric field at the interface between the electrode and the fluid found that the molecules, atoms or ions of the substance have enriched or poor adsorption at the interface, and found that most inorganic anions are surface active substances with a typical ion adsorption law, while the surface of inorganic cations activity is small. Therefore, electrochemical cleaning of electrodes only considers the case of anion adsorption. The adsorption of anions is closely related to the electrode potential, and the adsorption mainly occurs in the potential range that is more positive than the zero-charge potential, that is, the electrode surface with the opposite sign. On the electrode surface of the same charge, when the residual charge density is slightly larger, the electrostatic repulsion is greater than the adsorption force, and the anions are quickly desorbed, which is the principle of electrochemical cleaning. 2. Mechanical removal method The mechanical removal method realizes electrode removal by installing a special mechanical structure on the electrode. There are currently two forms: one is to use a mechanical scraper. A scraper with a thin shaft is made of stainless steel, and the scraper is drawn out through a hollow electrode. A mechanical seal is used between the thin shaft and the hollow electrode to prevent the outflow of the medium, so a mechanical scraper is formed. When the thin shaft is rotated from the outside, the scraper rotates against the plane of the electrode end to scrape off the dirt. This scraper can be used manually or automatically with a motor-driven thin shaft. Among the domestic electromagnetic flowmeters, the scraper-type electromagnetic flowmeter of Xi'an Yunyi has such performance, and the performance is stable and the operation is convenient. The other is in the tubular electrode, which is equipped with a wire brush for removing dirt, and the shaft is wrapped in a sealed“O”ring to prevent fluid leakage. This kind of cleaning device requires someone to frequently pull the wire brush to clean the electrode, which is not very convenient to operate. It is not as convenient as the scraper-type electromagnetic flowmeter of Xi'an Yunyi. 3. The ultrasonic cleaning method applies the ultrasonic voltage of 45~65kHz generated by the ultrasonic generator to the electrode, so that the energy of the ultrasonic wave is concentrated on the contact surface between the electrode and the medium, so as to use the ability of the ultrasonic wave to crush the dirt to achieve the purpose of cleaning. 4. Electric breakdown method This method uses alternating high-voltage electricity to be regularly added between the electrode and the medium, generally 30~100V. Because the electrode is attached, its surface contact resistance becomes larger, and the applied voltage is almost concentrated on the attached object. The high voltage will break down the attached object and then be washed away by the fluid. For overall safety, the use of electric breakdown method must be to clean the AC high voltage directly on the sensor signal output terminal when the flowmeter is interrupted for measurement, the signal line between the sensor and the converter is disconnected, and the power is cut off. The maintenance and cleaning methods of several electromagnetic flowmeter electrodes have been introduced above. In fact, if we can fully consider that the measuring medium will pollute the electrodes in the future, then we should choose a scraper type electromagnetic flowmeter, which can be very convenient. The maintenance and cleaning of the electrode can save a lot of trouble. Xi'an Yunyi scraper electromagnetic flowmeter is composed of display instrument, shell, upper coil, lower coil, electrode assembly, etc. The electrode assembly is a detachable scraper electrode structure. This structure is to put the signal electrode on the belt. On the scraper rod of the scraper, the signal electrode and the scraper rod are fixed in the electrode cup by the compression nut, the electrode cup is welded on the inner body, and the signal electrode is separated from the inner body, the electrode cup and the compression nut by insulating materials. Open; when the signal electrode needs to be maintained and maintained, just open the cover, turn the handle by hand, and drive the scraper rod to rotate, so that the scraper close to the signal electrode scrapes off the dirt on the surface of the signal electrode, and after cleaning, turn the scraper in the direction of rotation. To the direction of fluid flow (there is a direction mark on the knob), the operation is very convenient. Electromagnetic flowmeter electrode cleaning method: The following are the cleaning methods after several special media contaminate the electrode (only applicable to the electromagnetic flowmeter that can insert the electrode) Electromagnetic flowmeter electrode cleaning method 1. For inorganic pollution, the electrode can be immersed in 30 minutes in 0.1mol/L dilute hydrochloric acid, rinse with pure water, and then immerse in 3.5MOL/L potassium chloride solution for 6 hours before use. 2. Immerse in 4% hydrogen fluoride solution for 3~5s, take out and rinse with distilled water, then soak in 0.1mol/L hydrochloric acid solution for several hours, rinse with distilled water, and calibrate 3. For organic oil stains and oil film pollution, it can be cleaned with detergent The platinum or gold surface is washed with pure water, and then immersed in 3.5MOL/L potassium chloride solution for 6 hours before use. 4. The surface of platinum is seriously polluted and an oxide film is formed. The platinum or gold surface can be polished with toothpaste, then washed with pure water, and then immersed in 3.5MOL/L potassium chloride solution for 6 hours before use. 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 Clean the Electrodes of Electromagnetic Flow Meters Cleverly'
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