Locking device for twenty-high roll mill supporting roll saddle

The invention belongs to the technical field of plate-strip rolling, and particularly relates to a locking device for a twenty-high roll mill supporting roll saddle. The locking device comprises a fixed baffle arranged on one side of the supporting roll saddle and a end face pressing plate arranged at the end of a twenty-high roll mill rack, the other side of the supporting roll saddle is provided with a movable pressing plate, a first guide groove is formed in the side face of one end of the movable pressing plate, an oblique long hole guide groove in the axial direction of a supporting roll is formed in the middle of movable pressing plate, and a guide rod is arranged in the oblique long hole guide groove and fixed on the twenty-high roll mill rack; a transverse moving oil cylinder is arranged in the twenty-high roll mill rack located outside the movable pressing plate, an oil cylinder piston rod of the transverse moving oil cylinder is fixed on the end face pressing plate, and a second guide groove matched with the first guide groove of the movable pressing plate is formed outside a cylinder body of the transverse moving oil cylinder. According to the locking device for the twenty-high roll mill supporting roll saddle, manual operation is not needed, the labor difficulty is reduced, the roll replacing operation efficiency is improved, the locking degree consistency for multiple supporting roll saddles is high, and the roll mill operation is stable and reliable.