Centering and stacking device for nodular cast iron pipes

The utility model discloses a nodular cast iron pipe centering and stacking device which comprises a containing groove, a sliding rail is arranged at the bottom end of the containing groove, a sliding plate is connected into the sliding rail in a sliding mode, and an arc-shaped groove is formed in the bottom end of the interior of the containing groove. According to the spheroidal graphite cast iron pipe centering and stacking device, by arranging a limiting strip plate, a baffle, a movable groove, an air cylinder, a hinged plate, a mounting plate, a driving hydraulic cylinder and a sliding groove, during stacking, multiple sets of spheroidal graphite cast iron pipes are placed in a containing groove, the containing groove can center the spheroidal graphite cast iron pipes, and after the containing groove is moved to a proper position, the spheroidal graphite cast iron pipes are placed in the containing groove; a driving hydraulic cylinder is started to push one end of a placement groove to rise, then an air