Gas top pressure operation and working principle: Gas cylinder pressure gas cylinder system: The cylinder group is equipped with N gas cylinders, and each gas cylinder is connected to a DN25 pipeline through a pipeline. The DN25 pipeline is connected to the top of the air pressure tank. The on-off of the road is controlled by the solenoid valve D1, the internal pressure of the gas cylinder is (12MPa--15MPa) kg, and the outlet pressure is set below the lower limit pressure of the system P4 = 0.42. Usually, the cylinder system does not work and is always in a dormant state. It is put into operation when a fire occurs. The working process is that when a fire occurs, the pressure of the voltage stabilization system drops sharply. When it drops to P4, the cylinder group solenoid valve D1 opens, and the high-pressure gas of the cylinder group is accompanied by the high-pressure gas of the air pump to quickly enter the pressure tank, and the pressure is The water in the tank quickly hit the pipe to ensure a 10-minute emergency fire water supply.