Pipeline butt joint rubber opening device

The utility model discloses a pipeline butt joint rubber opening device, which belongs to the technical field of pipeline construction and comprises a supporting seat, a bearing fixedly mounted in the supporting seat, a plurality of first supports hinged to the surface of the bearing, second supports hinged to the end portions of the first supports, a plurality of sliding grooves formed in the top of the supporting seat, and sliding blocks slidably connected in the sliding grooves. A motor is fixedly installed in the supporting seat, the output end of the motor is in transmission connection with a rotating shaft, a bearing is fixedly installed on the surface of the rotating shaft, and when the motor is started, the rotating shaft rotates, and a threaded sleeve on the surface of the rotating shaft rotates; and the second support starts to slide and disperse in a sliding groove in the top of the supporting seat through hinging, so that the rubber ring arranged on the surface of the second support in a sleeving