Structure for stabilizing furnace profile at upper part of blast furnace body

The utility model discloses a stabilizing structure for a furnace profile at the upper part of a blast furnace body, which relates to the technical field of blast furnace smelting equipment and comprises a cooling wall, a connecting tenon piece and an insert brick, a swallow-tail-shaped groove is formed in the cooling wall; the connecting tenon piece comprises a sleeve body, a triangular clamping block and a wedge-shaped clamping column, the sleeve body is a hollow rectangular body with an opening in one end, and sliding grooves are symmetrically formed in the upper end face and the lower end face of the sleeve body; the triangular clamping blocks are trapezoidal tables, the triangular clamping blocks are symmetrically arranged in the sliding grooves, the upper bottoms of the trapezoidal tables on the triangular clamping blocks face the opening end of the sleeve body, the lower bottoms of the trapezoidal tables on the triangular clamping blocks are in contact connection, and clamping holes are formed in the s