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Magnetic flap level gauge is a kind of liquid level measuring instrument widely used in the tank farm. In the actual use process, sometimes there will be magnetic flap level gauge, level gauge, level transmitter, level transmitter, capacitive level gauge, capacitive level gauge, capacitive level transmitter, capacitive level transmitter, level switch, level switch, capacitive level gauge, capacitive level gauge, level gauge, level instrument Capacitive liquid level transmitter, capacitive level transmitter, RF capacitive level switch, RF capacitive level switch, capacitive level switch, capacitive level switch, tuning fork level switch have faults due to magnetism,
According to the summary of technicians, it can be concluded from the force on the float that if the float is not attracted at the level switch, it can rise with the liquid level, either increase the buoyancy, or reduce the gravity or reduce the magnetic attraction between the float and the level switch.
With regard to the two different treatment methods, if the buoyancy is increased, the float volume will inevitably increase, and the float gravity will also increase. However, the float in the pontoon has little margin for volume increase.
However, by reducing the gravity, the center of gravity of the float may move up, and the float is prone to side rotation and rubbing with the pontoon; After the center of gravity of the float moves up, the magnetic steel center of the float may be inconsistent with the liquid level of the float, and the magnetic flap level gauge may display a deviation.
How to reduce the magnetic attraction between the magnetic switch and the float, we give you four options:
(1) The first is to reduce the magnetism of the microswitch. The magnetic attraction of the float and the microswitch also decreases. When the float rises or falls, the force of the float driving the microswitch decreases, and the work of the magnetic flap level gauge will not be affected.
(2) The second is to reduce the magnetism of the float, but it will cause the flap to rotate slowly, lag or fail to act. Because the magnetic flap overturning is driven by the magnetic gravity of the float, reducing the magnetism of the float will also reduce the magnetic gravity, which is easy to cause abnormal flap action.
(3) The third is to increase the distance between the float and the microswitch. Because the magnetic attraction increases with the decrease of the distance of the magnetic material, increasing the distance will also reduce the magnetic attraction of the float to the microswitch. Specifically, iron sheet can be added at the microswitch of the float, and the microswitch can be added after thickening to a certain extent, so that the magnetic gravity of the float can just drive the float, but the gravity is not too large.
(4) The last scheme is to increase the rotation angle of the microswitch. The microswitch can rotate at a certain angle under the action of the magnetic force of the float. However, because the microswitch is limited by the limit column, the actual rotation angle is very small. After increasing the rotation angle, the magnetic column of the microswitch rotates with the float rising and turns to the limit column. If the force between the float and the magnetic column of the microswitch is very small at this time, the float will not be subjected to a large force from the microswitch
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