Method and device for automatically cleaning solid substances on filter plate of closed plate and frame filter

The invention discloses a method and a device for automatically cleaning solid substances on a filter plate of a closed plate-and-frame filter, belongs to the technical field of industrial filtration, and is mainly applied to places where the plate-and-frame filter filters filter toxic and harmful substances. The device mainly comprises an outer box body, a hydraulic device, a plate shifting device, a push plate, a guide plate and a solid transfer device. According to the device, the hydraulic device I pushes the plate frame to move front and back, so that the plate frame is pressed and loosened; a hydraulic device II fixed between the upper part of the plate frame filter and the arc-shaped box body stretches into the space between the plate frames by pushing the scraping plate after the plate frames are unfolded through the plate shifting device, so that solid substances in the plate frames are pushed to automatically fall off. The falling substances are transferred to the outside of the system through a tra