Rigid beam connecting device for preventing failures of corners of water-cooled wall of tower type supercritical boiler

Abstract

The invention relates to a rigid beam connecting device for preventing failures of corners of a water-cooled wall of a tower type supercritical boiler. The rigid beam connecting device comprises water-cooled wall pipes, fins for connecting the water-cooled wall pipes into the water-cooled wall and a corner plate for being connected with a rigid beam in the boiler; the outer side surface of the water-cooled wall is connected with the corner plate through at least one group of guard plate structure; and the guard plate structure is connected to the fins corresponding to the stress concentration position of the water-cooled wall, and the guard plate structure covers multiple water-cooled wall pipes at the same time so as to increase the stress area of the water-cooled wall. According to the rigid beam connecting device, the guard plate structure is additionally arranged at the position, where stress concentration is most likely to occur, of the joint of the corner plate and the water-cooled wall, direct welding of the corner plate and the water-cooled wall pipes is avoided, meanwhile, the contact area of the corner plate at the two positions is enlarged, stress is dispersed, and therefore the problem of the crack failures possibly occurring at the welding positions of the corners of the water-cooled wall and the corner plate is solved, and the equipment can operate safely.

Description

technical field [0001] The invention relates to the technical field of rigid beam connection of boilers, in particular to a rigid beam connection device for preventing failure of corners of water cooling walls of tower-type supercritical boilers. Background technique [0002] In large-capacity utility boilers, the rigid beam system is an essential component to ensure the safety of the furnace cladding. It is generally set as a steel structure system that surrounds and hangs on the periphery of the water-cooled wall of the boiler to protect the water-cooled wall. Its function is mainly to limit the deformation of the water wall tubes and protect the water wall tubes from damage under the maximum instantaneous allowable pressure of the boiler. The rigid beam connecting device at the corner of the water cooling wall serves as two fulcrums at the ends of the rigid beam and together with the rigid beam form a simply supported beam structure. The connecting device is used to bear...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects of the prior art, the present invention provides a rigid beam connection device to prevent the failure of the corner of the water wall of the tower supercritical boiler, which solves the problem that the water wall tube is easily welded due to stress concentration at the part where the water wall tube and the angle plate are directly welded. Technical problems with crack failure

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