Why is the tank at the gas station buried under the ground?
This pump has a dual role: through smart gun into the tank into the hydrocarbon fuel (gasoline), and send out the extraction tank of gasoline vapor, and then sent back to the oil tank of gasoline vapor in the underground. The tank is made of double layers, and the upper half is used to collect gasoline vapor (which is cooled to gasoline), and the lower half to store gasoline. A special liquid antifreeze is injected into the interlayer of the oil tank, and the antifreeze is connected with a precision buffer tank. The main function of the buffer tank is to detect whether the tank is leaking or not. When refueling, as long as the smart gun into the car's fuel tank, automatic oil valve opens, Everfount gasoline pipeline from the oil tank, the gasoline vapor through a steam pipe into the storage tank. An overflow detector at the end of the gun will automatically seal off the oil pipeline when the tank is full of petrol. The exhaust hole at one end of the tank can discharge excess gas and adjust the pressure of the tank. A sand tank placed on the ground is a simple fire fighting facility.
Simply speaking, the role is fire protection, thermal protection (summer underground temperature is low), antifreeze, easy to operate.
The gas stations we usually see are only a small part of the ground, and most of the stations are buried underground. The machine that displays data when we fill the car is actually an oil pump with a fine appearance and good performance, which is connected by many pipelines and underground storage tanks.
