Automatic fire prevention and extinguishment cable trough device of electric shovel excavator

The invention discloses an automatic fire prevention and extinguishment cable trough device for an electric shovel excavator, and the device comprises a containing mechanism which comprises a limiting assembly, a top cover disposed on the limiting assembly, and a fire-fighting nozzle disposed on the top cover; the triggering mechanism comprises a triggering assembly arranged on the top cover, a linkage assembly arranged on the top cover, a closing assembly arranged on the linkage assembly and a clockwork spring arranged on the closing assembly, the ventilation effect of the shell is improved through the arrangement of the heat dissipation grooves, and the cable placement environment is improved; the arrangement of the heat dissipation grooves improves the ventilation effect of the shell, the placement environment of the cable is improved, the situation that the cable is on fire due to the overhigh temperature is avoided, and the arrangement of the sealing ring and the top plate improves the sealing performanc