Fast assembling and disassembling device for wall internal corner die plate

The invention discloses a fast assembling and disassembling device for a wall internal corner die plate in cast-in-place concrete engineering, The fast assembling and disassembling device is mainly used for correcting angles, aligning plate seams and accelerating fastening and disassembling and comprises two C-type sliding groove light steel sliding rails used for being fixed to a die plate body, an adjustable long inclined steel pipe, a long steel pipe with the adjustable inclined edge center line, three connecting sliding way tenons, two vertical adjusting gears and a center line rod rotating bar. When the wall internal corner die plate is assembled and disassembled, the rotating bar is inserted into a rotating hole in a center line rod, the center line rod is rotated until the outer end gear is completely meshed with the inclined supporting tube gear, at the moment, the full length of the center line rod is just one second that of the inclined rod, and sliding grooves in the two sides are located in the vertical state of the plane; the center line rod is rotated to drive the inclined supporting tube gear to rotate and drive sliding blocks in the sliding grooves to move outwards or inwards, when the sliding blocks moving outwards enter (or exit from) horizontal back arrises of an adjacent die plate, the corner die plate and the adjacent die plate are connected into a whole (or separated) in a butt-seam mode, and then assembling (disassembling) of the die plate is finished.