Support structure for chimney internal steel cylinders

The invention relates to a support structure for a chimney internal steel cylinder. The support structure comprises a chimney external concrete cylinder and the internal steel cylinders, wherein the internal steel cylinders are positioned in an inner cavity of the chimney external concrete cylinder. The support structure is characterized in that the outer surface of each internal steel cylinder is connected with a reinforcing ring in a sleeved way and is provided with a plurality of steel corbels and a plurality of hoisting projected lugs; the inner cavity of the chimney external concrete cylinder is provided with a square frame body formed by defining and connecting a plurality of steel beams; the internal steel cylinders are positioned in the square frame body and are hung on the square frame body to form a hanging type hoisting structure; the steel corbels are positioned at the vertex angles of the square frame body; the bottom of each steel corbel is connected with a corbel steel beam; each of the two ends of each corbel steel beam is fixedly connected with the adjacent steel beam of the square body, so that a longitudinal support structure of the internal steel cylinders is formed; each hoisting projected lug is provided with a hoisting hole through which a steel wire passes; and each internal steel cylinder is hung on the square frame body through a steel hanging wire, so that a transverse support structure of a hanging structure is formed. The support structure has the advantages that the reasonable mechanical arrangement is used; the steel strength can be sufficient; the cylinder wall stress is mainly tensioned force, so that the wall thickness can be reduced; and the engineering quantity is reduced.