Hot air door device of boiler coal mill

The utility model discloses a hot air door device of a boiler coal mill, which relates to the field of hot air doors and comprises a shell, a hot air door opening is arranged on the shell, a hot air door is arranged in the hot air door opening, and a telescopic groove recessed in the shell is arranged on the inner wall of one side of the hot air door opening. When the rotating wheel rotates, the rotating wheel is in meshing transmission with the first toothed plate, so that the hot air door is driven to move in the telescopic groove, the hot air door is closed or the hot air door opening is opened, the sealing door is convenient to open and close, the hot air door is opened and closed through meshing transmission, the hot air door moves stably, the moving distance of the hot air door is controllable, and practicability is high. 本实用新型公开了一种锅炉磨煤机热风门装置，涉及到热风门领域，包括壳体，所述壳体上设有热风门口，所述热风门口中设有热风门，所述热风门口的一侧内壁上设有凹陷于壳体内部的伸缩槽，在使用时，通过转动轮的端部伸入矩形槽中，转动轮转动时，转动轮与第一齿板啮合传动，从而带动热风门在伸缩槽中移动，使得热风门封闭或者将热风门口打开，便于开关密封门，且通过啮合传动实现开关热风门，热风门