Valve control device for fire-extinguishing piping

A valve control device for fire-extinguishing piping, the valve control device comprising:

• a deluge valve defining therein a valve port as well as a water inlet passage and a water outlet passage that are both communicated with the valve port, the deluge valve also defining therein a water-pressure control chamber that is equipped with a valve plug for removably closing the valve port, and the deluge valve having a water inlet manifold that is communicated with the water inlet passage and the water-pressure control chamber, and a water outlet manifold that is communicated with the water outlet passage and the water-pressure control chamber;
• an adjustable-pressure valve being installed on the water outlet manifold;
• a constant-pressure valve being installed on the water outlet manifold and arranged between the water-pressure control chamber and the adjustable-pressure valve;
• and
• a switch valve being installed on the water outlet manifold and arranged between the water-pressure control chamber and the constant-pressure valve,
• wherein, the water inlet manifold guides fire-extinguishing water in the water inlet passage to enter the water-pressure control chamber for pressure accumulation, and the water outlet manifold guides the fire-extinguishing water in the water-pressure control chamber to be discharged into the water outlet passage that uses the switch valve to control when the fire-extinguishing water is discharged, and wherein the constant-pressure valve performs first water-pressure control on the fire-extinguishing water in the water-pressure control chamber and in the water outlet manifold, and the adjustable-pressure valve performs second water-pressure control on the fire-extinguishing water in the water-pressure control chamber and in the water outlet manifold,
• wherein the water outlet manifold is provided with an outlet needle valve that controls a flow of the fire-extinguishing water discharged from the water-pressure control chamber to the water outlet passage.