Flame detection mechanism beneficial for preventing thermal stress damage

The invention discloses a flame detection mechanism beneficial for preventing thermal stress damage. The flame detection mechanism comprises a shell and a flame detection assembly, wherein the shell comprises a side wall, a bottom board and a covering board, the side wall forms the side surface of a box, the bottom board forms the bottom surface of the box, and the covering board forms the upper end face of the box, the side wall is of a cylindrical structure formed by rolling a corrugated plate, wrinkles on the corrugated plate form closed rings in the circumferential direction of the side wall, and different portions of each ring are located on the same height; the side wall or the covering board is further provided with glass; the flame detection assembly comprises any one of an infrared detector and an ultraviolet detector; the side wall or the covering board is further provided with one or more cable penetrating ports, and cables penetrate through the shell through the cable penetrating port. The flame d