Automatic quantitative refueling device circuit

This device can refuel the tractor more accurately (for example, the refueling amount is 4kg, the actual amount is about
4kg ± 0.1kg). The refueling time is about 20 seconds, while the oil pump only takes 15 seconds. The device can also be used for quantitative control
of non-conductive liquids with good fluidity where quantitative error requirements are not very strict . It cannot be used for flammable and volatile liquids.     When the refueling nozzle is removed from the hanger, the micro switch SQ is touched to close it. The contactor KM2 is energized and self-locking, and its main contact is closed. The electromagnet YA armature pulls the lever to make the switch fixed on the wall The oil outlet valve of the quantitative oil tank is opened. At this time, if the refueling nozzle valve is pressed, the diesel will automatically flow into the fuel tank of the tractor engine.     Quantitative control is realized by float and high and low oil level switches Sl, S2, etc.