Cooling device for rolled pierced billet

The utility model discloses a rolled pierced billet cooling device which comprises water rings, the diameter of the water rings is far larger than that of a pierced billet, the number of the water rings is two, a plurality of connecting pipes are installed between the water rings, the connecting pipes are communicated with the interiors of the two water rings respectively, and a plurality of water distribution pipes are installed on the surfaces of the interiors of the two water rings. Nozzles are mounted at one ends, far away from the water ring, of the water distribution pipes. When a rolled pierced billet passes through the double water rings of the cooling device, cooling water is sprayed out from the spray head, the surface temperature of the pipe is reduced, the finish rolling temperature is guaranteed, the effect is particularly obvious when an alloy steel pipe is rolled, and the production efficiency can be improved by reducing the rolling rhythm and cooling through the cooling device. 本实用新型公开了一种轧后荒管降