Anti-cracking shell for top combustion type hot blast stove

The utility model relates to an anti-cracking outer shell for a top combustion type hot blast stove, which can effectively solve the problems of preventing a stove shell from cracking, reducing the formation of nitric acid liquid corrosive media, improving the heat efficiency and benefits and prolonging the service life, and comprises an original stove body outer shell, and an outer shell is concentrically sleeved outside the original stove body outer shell at intervals to form a double-layer composite structure. Refractory fiber cotton heat preservation cotton is filled between the original furnace body shell and the outer layer shell, the outer layer shell is a hollow body which is formed by welding steel plates capable of preventing hydrogen induced cracking and is consistent with the original furnace body shell in shape, the outer side of the welding position of a steel plate connector is in a single-face V shape, and the single-face V-shaped connector is firmly connected through steel plate welding rod w