Because of the unique product structure of the magnetic column level gauge, it is a very intuitive and easy-to-use level gauge. Under normal circumstances, the magnetic turning column level gauge can achieve accurate liquid level and boundary level detection, but in the process of use, many magnetic turning column level gauges still show inaccurate display, changing the level of the liquid level or drawing a straight line, etc. One of the main reasons is that the float is dirty, and the other is that the medium is relatively viscous and crystallized. Yes, this is the common and easy cause of failure in the use of magnetic turning column level gauges, which accounts for most of the faults of magnetic turning column level gauges.Because the float in the measuring tube of the meter contains permanent magnets, and the measured medium contains more or less impurities, the impurities will be adsorbed on the surface by the magnetic float when the medium is not flowing for a long time. The prolonged and more concentrated, it is easy to cause the float to increase in mass and sink and lose the detection function. Even if the adhesion of dirt and impurities will not cause the float to sink, its attachment to the surface of the float causes the float to move up and down in the measuring cylinder to be restricted, and it will become stuck. The phenomenon of blocking or jamming, if the inner wall of the measuring cylinder is also attached to impurities, it will further hinder the up and down floating of the float, causing the phenomenon of jumping or jamming in the change of the liquid level.In addition, the viscosity of the medium itself is relatively large under normal conditions, which can easily cause the float to move slowly.In addition, some media crystallize at room temperature, which can easily cause the above phenomenon of floats.The float has jamming failure. Our usual method is to disassemble the flange under the float level gauge and take out the float for manual cleaning and decontamination. This maintenance work is very dirty. When measuring corrosive media, such as various alkalis In the case of liquid, acid liquid, acid gas separation tank, gas gas or various corrosive industrial media, it is often injured by getting corrosive media on the body during maintenance, and the volatilization of toxic gas can also cause harm to the human body. The maintenance, disassembly, and cleaning of floats is a more dangerous job, and protection work should be done in advance at this time.Regarding the float cleaning method, in addition to manual disassembly and cleaning, we can also modify the magnetic flip column level gauge to achieve a disassembly-free method, which is to modify the wire plug on the upper part of the magnetic flip plate measuring cylinder, and install a flushing pipeline. Use steam and tap water to switch. When the float jam occurs, just close the side of the magnetic column level gauge or the valve of the upper and lower connecting devices, open the drain valve, and then open the upper flush valve, and use steam and tap water in turn. It can remove the dirt and impurities adsorbed on the magnetic float, and can also remove the impurities on the inner wall of the measuring cylinder, and it will not cause corrosive damage to the human body, and it also reduces the labor intensity.Since the magnetic turning column level gauge uses the principle of the communicating device, the medium in the measuring cylinder is outside the equipment and has been exposed to the ambient temperature for a long time. When the measured medium is easy to condense or easy to freeze below zero, consider heat preservation And heat tracing, be careful not to use the easy-to-magnetic iron wire to fix the insulation material to prevent it from being magnetized to cause the panel display and the remote magnetic sensor to be affected. For the opening of steam tracing, the flow rate should also be controlled to prevent the magnetism from being weakened due to excessive temperature.For the jamming or jamming phenomenon of the float caused by the viscosity and crystallization of the medium, we recommend adding a heating tube or heating cable, and then choosing a magnetic turning column level gauge with a jacket. In this way, the viscosity of the steam heating medium is reduced, and at the same time, the crystallization problem of the medium that is easy to crystallize can be appropriately solved. If the effect is not satisfactory, then choose other instruments such as flange-type differential pressure transmitter to solve this problem.Special attention should also be paid to the failure of the drain valve of the magnetic column level gauge. If it is necessary to replace it, it should be replaced in time. At present, because the needle valve is relatively cheap, the instrument manufacturer usually chooses the needle valve. In routine maintenance and repair, it is very easy to block the needle valve, and when discharging corrosive and toxic media, it is required that it should not be directly discharged, but it cannot be taken over and guided. For example, the gate valve can be replaced and installed, which has a prolonged service life and is easy to operate. When discharging media that easily pollutes the environment, it can be screwed on and short-circuited and guided to the sewage line, making the operation more convenient.
Post time: 21-09-21