Device for fixing door plate of primary air chamber of coal mill

The utility model provides a coal mill primary air chamber door plate fixing device which comprises an air chamber shell and an inspection hole door plate, and the inspection hole door plate is arranged on the air chamber shell and used for sealing an inspection hole formed in the air chamber shell. A first lug plate and a second lug plate are arranged on the outer side of the air chamber shell and located on the two sides of the inspection hole door plate respectively, a connecting rod is arranged on the second lug plate, a pressing plate is arranged on the outer side of the inspection hole door plate, a pressing frame is arranged on the side, away from the inspection hole door plate, of the pressing plate, and the pressing frame comprises a pressing rod and a spacer block. And the spacer block is arranged between the pressing rods. The pressing plate is arranged on the pressing frame, the pressing frame comprises the pressing rods which are arranged at intervals, the second end of the pressing plate can be