Explosion-proof audible and visual alarm easy to install

The invention discloses an explosion-proof audible and visual alarm easy to install. The alarm comprises an upper cover, a lower cover and a lampshade. The top of the lower cover is connected with theupper cover; the top of the upper cover is connected with the lampshade; a buzzer is arranged in the lower cover, and a screw ring is positioned under the buzzer; a nylon column is arranged at the top of the buzzer; the top of the nylon column is connected with a fixing plate, the top of the fixing plate is connected with a supporting column, and the top of the supporting column is connected withan alarm lamp; a control circuit board is arranged on the fixed plate; a waterproof joint is arranged in the outer side of the upper cover; a second sealing ring is arranged at position where the lower cover and the upper cover are connected; a first sealing ring is arranged at position where the upper cover and the lampshade are connected; and the nylon column is fixedly connected with the fixedplate through a cross pan head screw. The circuit board is arranged between the upper shell and the lower shell, and the circuit board is extruded by the upper shell and the lower shell. A screw fastening step is omitted. The cost of part installation is reduced, and the assembly efficiency of the audible and visual alarm is greatly improved.