Smoke exhaust fireproof valve

The utility model discloses a smoke exhaust fireproof valve which comprises a panel, a ventilation pipe, a fireproof cover, a connecting rod, a spring and a stop piece. The panel is provided with an air inlet, the ventilation pipe is connected with the panel, and one end of the ventilation pipe is communicated with the air inlet; the fireproof cover is hinged to the other end of the ventilation pipe; the stop piece is welded to the inner wall of the ventilation pipe through low-temperature welding flux, and a limiting groove is formed in the surface of the stop piece. One end of the connecting rod is hinged to the inner wall of the fireproof cover, and the other end of the connecting rod is supported in the limiting groove. One end of the spring is connected with the inner wall of the ventilation pipe, and the other end of the spring is fixedly connected with the other end of the connecting rod. The utility model has the advantages of simple structure and lower cost. 本实用新型公开了一种排烟防火阀，包括面板、通风管、防火盖、连接杆、弹簧和止动片；所述