Slip ring convenient to disassemble and assemble and special for crane

The utility model discloses a special slip ring for a crane convenient to disassemble and assemble, which comprises a fixed seat, a connecting block, a connecting disc, a protective shell, a stator group and a rotor group, the connecting block is fixed on the top surface of the fixed seat, and the protective shell is arranged above the connecting block. The protective shell is detachably connected with the connecting block through a connecting disc. The device has the beneficial effects that positioning columns are matched with positioning holes, so that the device can be conveniently positioned during mounting, and meanwhile, positioning grooves are matched with positioning rings, so that a certain positioning effect can be achieved during mounting of the device; and the sealing performance of the connecting position of the connecting disc and the connecting block can be improved through cooperation of the positioning groove and the positioning ring, the sealing effect of the device can be further improved b