The refueling nozzle is a terminal that outputs oil from the refueling machine. The refueling nozzle will directly penetrate into the car's fuel tank and input the oil into the car's fuel tank.
The oil gun generally equipped in gas stations is a self-sealing oil gun. Its main structure consists of an oil nozzle, a main valve, a baffle, a switch handle, an oil nozzle, etc.
The principle of the refueling gun mainly uses the relationship between pressure and flow to work. When refueling the car, lift the switch handle, the push rod will open the main valve, and the fuel flows into the lower chamber of the main valve through the main valve. Under the action of pressure Open the tilt valve to allow the oil to flow into the car's fuel tank through the nozzle of the oil nozzle.
During the oil flow process, the air in the cavity behind the tilt valve is taken away. When the fuel tank is not filled with oil, the air taken away passes through the air pipe and the air pipe nozzle is compensated. When the oil tank is filled with oil, the air hole is blocked by the oil. The air cannot compensate, and the air in the cavity is taken away to form a negative pressure. If the air pressure in the fuel tank is unbalanced, the engine will be triggered to shut down automatically, and a click of the refueling gun will be heard, which acts as a self-sealing function.
