Three-joint unit connection shifting and transporting device

The invention discloses a three-joint unit connection shifting and transporting device. The device is mounted on the inner side of a tower frame; vertical guide rails are arranged on the inner wall of the tower frame; the three-joint unit connection shifting and transporting device comprises a travelling block clamped on the guide rails; a slewing device is mounted on a guide mechanism of the travelling block in a clamping mode; the bottom of the slewing device is connected with the top end of a mechanical arm through a pin shaft; a base of a swinging liquid cylinder is fixed on the slewing device; the piston end of the swinging liquid cylinder is connected to the mechanical arm; and a clamping head is hinged to the bottom end of the mechanical arm. The mechanical arm is mounted at the bottom of the slewing device, through rotation of the slewing device and action of the swinging liquid cylinder, mutual shifting and transporting of three-joint units from the interior, the exterior and the wellhead position of