Spontaneous combustion prevention alarm device for coal-fired power plant

The utility model provides a coal-fired power plant spontaneous combustion prevention alarm device which comprises a column body and a first circulation groove, a transmission shaft is movably connected in the column body through a bearing, the lower end of the transmission shaft is fixedly connected with a drill bit, the upper end of the transmission shaft is fixedly connected with a rotating disc, and a first installation groove is formed in the outer surface of the column body and communicated with a first groove. A first limiting groove is formed in the end face of the lower end of the column body, the drill bit is fixedly connected with a first limiting block, the first limiting block is slidably connected into the first limiting groove, a first circulation groove is formed in the side wall of the column body, a liquid outlet formed in the first circulation groove communicates with the surface of the column body, a liquid injection groove is formed in the upper end of the first circulation groove, and a