Ultra-wide large drum vulcanizer

The invention relates to an ultra-wide large drum vulcanizer. A drain pipe (6) and an air inlet pipe (7) are connected to the side wall of a vulcanizing drum (2) in a penetrating manner, the drain pipe (6) is of an L-shaped structure composed of a transverse drain pipe (6.1) and a vertical drain pipe (6.2), and the free end of the vertical drain pipe (6.2) on the side wall of the transverse drainpipe (6.1) extends down to get close to the inner wall of a central cavity of the vulcanizing drum (2); the air inlet pipe (7) is of an L-shaped structure composed of a transverse air inlet pipe (7.1)and a vertical air inlet pipe (7.2), the transverse air inlet pipe (7.1) is connected to the side wall of the vulcanizing drum (2) in a penetrating manner, the transverse air inlet pipe (7.1) communicates with the central cavity of the vulcanizing drum (2), and one end of the vertical air inlet pipe (7.2) is connected to a steam source while the other end communicates with the transverse air inlet pipe (7.1). The ultra-wi