Method for skillfully limiting rigid beam and expansion guide of suspension type flue gas waste heat boiler

The invention discloses a suspension type flue gas waste heat boiler rigid beam and expansion guiding ingenious mutual limiting method which comprises a steel frame upper beam, a steel frame lower beam, a displacement limiting rigid structure, a connecting angle plate, an expansion amount adjusting U-shaped bolt structure and a flue gas waste heat boiler hearth. Vertical profile steel is welded between the steel frame upper beam and the steel frame lower beam, the purpose of ingenious mutual limitation with the displacement limiting rigid structure is achieved, expansion and swing of the hearth are prevented, bolt holes are formed in the two ends of the rigid beam, perforated positioning plates are welded to the connecting angle plates, and the perforated positioning plates and the bolt holes are connected through U-shaped bolt structures for adjusting the expansion amount. A single-layer rigid beam capable of being flexibly expanded is formed; according to the method, the rigid beam and the expansion guide o