Fuel filling, drainage system

The utility model discloses a fuel filling, drainage system, it includes the filter, and first priming valve, high flow rate refuel the solenoid valve, and the low velocity of flow refuels the solenoid valve, a flow sensor, the second priming valve, first fuel outlet valve, the fuel divides into the three routes behind the filter, and the first via is connected with a flow sensor through first priming valve, and the second way is refueled the solenoid valve through the high flow rate and is connected with a flow sensor, and the third way passes through hangs down the velocity of flow and refuels the solenoid valve and be connected with a flow sensor, product oil tank oil -out is divided into two the tunnel, and the first via is put the oil pipe way with the air cushion and is connected, and second lu yuyi oil pipe way is connected, the air cushion is put oil pipe way and excessive oil pipe way and is connected with the 2nd flow sensor and waste oil bucket through the switching -over valve respectively. The utility model discloses a height, low flow solenoid valve and two flow sensor have realized automatic non - ration filling of fuel and automatic quantitative drainage, great improvement air cushion oil drain efficiency.