Plate feeding device

The utility model relates to a plate feeding device, and belongs to the technical field of heat preservation plate machining. The plate feeding device comprises a plate feeding frame, a plate clamping mechanism and a plate feeding mechanism, the plate clamping mechanism and the plate feeding mechanism are arranged on the plate feeding frame, a plate channel for plates to pass through is arranged on the plate feeding frame, and a rolling supporting mechanism is arranged on the plate feeding frame at the bottom of the plate channel; the clamping plate mechanism comprises a clamping plate frame, a pair of clamping plates arranged on the clamping plate frame and a clamping plate air cylinder used for driving the clamping plates to clamp or loosen the plates, the clamping plates are located on the left side and the right side of the plate channel respectively, and piston rods of the clamping plate air cylinder are connected with the clamping plates. A guide rail for the plate clamping frame to move back and forth