Drill bit dismantling device for tap hole of blast furnace

The utility model discloses a drill bit dismantling device for a tap hole of a blast furnace, which comprises a shell, a ratchet wheel, a drill bit cassette, an upper fixed end cover, a lower fixed end cover, a ratchet wheel rollover component and a handle, wherein the ratchet wheel is mounted in the shell through a bearing; the drill bit cassette is fixed on the ratchet wheel through screws; the upper and the lower fixed end covers are fixed on the two ends of the shell through screws; the ratchet wheel stop component is formed by a ratchet pin, a compression spring and an adjusting spring seat, wherein the head part of the ratchet pin is closely attached to the ratchet wheel, the compression spring is positioned between the tail part of the ratchet pin and the adjusting spring seat, and the adjusting spring seat is in threaded connection with the shell; and the handle is fixed on the shell. Through the drill bit dismantling device for the tap hole of the blast furnace, and the utility model can improve the