Cold water nitrogen deoxidizing device in extra-high voltage converter station valve cooling system

The utility model discloses a cold water nitrogen deoxidizing device in an extra-high voltage converter station valve cooling system. The device comprises a water storage device and a nitrogen cylinder, a manual exhaust valve and an air deoxygenization nitrogen inlet are arranged at the upper part of the water storage device; wherein the lower part of the water storage device is provided with an in-water deoxygenated nitrogen inlet, an internal cold water inlet and a deoxygenated water outlet, an aeration device communicated with the in-water deoxygenated nitrogen inlet is arranged in the water storage device, the air deoxygenated nitrogen inlet is connected with the output end of the nitrogen cylinder through a pressure stabilizing valve, and the in-water deoxygenated nitrogen inlet is connected with the output end of the nitrogen cylinder through a deoxygenated valve. According to the utility model, nitrogen can be injected into air at the upper part of the water storage device to realize air deoxygenation;