Water leakage detection device for hot blast valve of hot blast stove

The utility model relates to the technical field of hot blast valves, in particular to a water leakage detection device for a hot blast valve of a hot blast stove, which comprises a first water collecting pipe, the top end of the first water collecting pipe is connected with a blow-down valve on the hot blast valve, and a drain valve is mounted at the bottom end of the first water collecting pipe. A channel for nitrogen circulation is reserved between the inner peripheral wall of the cooling pipe and the outer peripheral wall of the first water collecting pipe, the cooling pipe is connected with a nitrogen inlet pipeline and a nitrogen outlet pipeline, the nitrogen inlet pipeline is provided with a nitrogen inlet valve, and the nitrogen outlet pipeline is provided with a nitrogen outlet valve; nitrogen is introduced into the cooling pipe to cool the first water collecting pipe, when the hot blast valve leaks little water and enters the first water collecting pipe in a water vapor state, water vapor can be con