Accurate positioning device for quickly disassembling and assembling concrete structure sleeve

The invention relates to the technical field of precise positioning for dismounting and mounting a concrete structure sleeve, and particularly provides a precise positioning device for quickly dismounting and mounting a concrete structure sleeve, which comprises a clamping mechanism, a micro-rotation loosening mechanism and a precise positioning mechanism. Through cooperation of the precise positioning mechanism and the clamping mechanism, concentric positioning and clamping of the sleeve and the inserting cylinder are achieved, precise positioning of dismounting and mounting of the concrete structure sleeve is achieved, the sleeve mounting accuracy and the perpendicularity of vertical lifting during dismounting are improved, the situation that concrete around the sleeve is damaged when the sleeve is lifted is avoided, and the service life of the sleeve is prolonged. Meanwhile, the clamping and fixing mechanism is matched with the micro-rotation loosening mechanisms, and after the clamping and fixing mechanis