Opening aligning device for welding of long-distance pipeline

The utility model discloses a long-distance pipeline welding aligning device which comprises a base and a transmission screw, the transmission screw is supported by the base, half of the transmission screw rotates leftwards and half of the transmission screw rotates rightwards, two guide rails which are symmetrically arranged and are parallel to the transmission screw are installed in the base, and two sliding supports which are symmetrically arranged are connected to the guide rails and the transmission screw. The two sliding supports are respectively connected with the transmission screw rod through a nut, a horizontal adjusting rotary disc is arranged at the top of each sliding support, a limiting structure is arranged on each horizontal adjusting rotary disc, and a pipe section clamping structure is installed on each horizontal adjusting rotary disc. According to the utility model, the sliding brackets are used as carriers for aligning pipe sections, the two sliding brackets are driven to be close to or f