Fire extinguishing device for slag leaking hopper of urban domestic garbage incinerator

The utility model relates to a fire extinguishing device for a slag leaking hopper of an urban domestic garbage incinerator, which comprises a fire extinguishing spray nozzle, a temperature instrument and an electromagnetic control valve, wherein distribution air under a grate is blown in from a lead-in air pipe of the slag leaking hopper, leaked slag under the grate can be easily accumulated at uneven parts in the slag leaking hopper under the grate, and the leaked slag in the slag leaking hopper can be easily accumulated at an uneven air pipe access inlet, so the fire extinguishing spray nozzle is arranged right against the air pipe access inlet. For the original fire extinguishing device without the slag leaking hopper, the grate can be burnt because the temperature of the slag leaking hopper rises when the leaked slag is on fire, after the arrangement of the fire extinguishing device, the fire extinguishing device can be immediately and automatically started for carrying out fire extinguishment on the sla