Because of its low cost, wide measurement range, clear instructions, high pressure rating, and good safety, magnetic float level gauges are widely used in oil refining chemical plants. However, if the magnetic float level gauge is unstable due to the performance of the magnetic steel, after a certain period of use, the magnetism weakens, the magnetic connection between the magnetic pot in the float and the small magnet in the indicator loses its magnetic connection, so that the indicator cannot perform magnetic tracking. Loss of indication, due to the magnetic weakening degree of several small magnetic steels in the indicator, resulting in the phenomenon of magnetic disorder (also known as Huaping), which is the main reason for the early occurrence of magnetic disturbance in the magnetic float level gauge. In recent years, with the technological advancement of some powerful and heavy-duty instrument manufacturing plants, the magnetic properties of magnetic steel have been enhanced, magnetic stability has been improved, and the “disordered magnetism†phenomenon has been reduced due to the above reasons. The reasons that are not easily noticeable are apparent. When a conventional V-cone flowmeter is used to measure the liquid level of a liquefied hydrocarbon vaporizable medium, the gas and liquid phases of the measured medium are converted to equilibrium under stable conditions. At this time, if liquid is drawn from the tank, the space above the liquid increases and the pressure in the gas phase decreases, and there will be a large part of liquid vaporization area where there will be a large number of bubbles, and the small bubbles will converge during the ascent. Large bubbles and large bubbles enter the measuring chamber of a conventional magnetic float level gauge, which may cause an ascending gas phase. When the gas phase meets the float during the ascent, the gas wants to pass around the float while the float moves at a high speed. Quickly loses the magnetic connection with the indicator outside the measuring room, causing "disorder magnetism". In addition, there are cases where a large number of bubbles of different sizes are mixed in a certain liquid phase due to a variety of reasons in a sealed pipe that is normally produced. In severe cases, even an "imaginary segment" may be generated. The presence of mixed imaginings in these liquid phases will change with production, if the relative position of the feed line and level gauge of a device equipped with a conventional magnetic float level gauge facilitates bubble entry In the level gauge, when the gas phase is mixed into the device, the gas phase enters the measuring chamber of the magnetic float level gauge. If some dispersed small bubbles enter, the density of the medium in the measuring chamber of the magnetic float level gauge is When the change occurs, the buoyancy of the float will change, the position of the float will change, and the level value indicated by the indicator of the magnetic float level gauge will produce a large or small error, that is, this situation interferes. The normal indication of the magnetic float level gauge, if it is a large bubble or a "gas phase segment" enters the magnetic float level gauge measurement chamber, it will also produce the "disorder magnetism" phenomenon as described previously without liquefied hydrocarbons. The above phenomenon that causes the conventional magnetic float level gauge to not work normally is caused by the impact of the mixed gas in the liquid medium measured by the liquid level gauge against the impact of the level gauge, in order to make the magnetic float level gauge normal For work, the V-cone flowmeter must be modified to adapt to this shock. Single-Side Bag Sealing Tapes,Duty Free Bag Tape,Tamper Proof Sealing Tape,Warranty Sealing Tape SHENZHEN SENING PACKING MATERIAL CO.,LTD , https://www.seningpacking.com
Analysis of Magnetic Disturbance in Maglev Level Gauge