COOLING FACILITY AND COOLING METHOD FOR HOT STEEL PLATE

摘要

The invention concerns a cooling equipment for a hot rolled steel plate which is arranged on a hot rolling line of a steel plate, wherein an upper header which supplies cooling water, upper cooling water jetting nozzles which are suspended from the upper header for jetting rod-like water flow, and an upper dividing wall which is arranged between the hot rolled steel plate and the upper header are arranged on an upper surface side of the hot rolled steel plate, wherein a large number of upper water-supply inlets which allow the insertion of lower end portions of the upper cooling water jetting nozzles thereinto, and a large number of upper drain outlets which drain the cooling water supplied to the upper surface of the hot rolled steel plate on the upper dividing wall are formed in the upper dividing wall, and a lower header which supplies cooling water and lower cooling water jetting nozzles which jet rod-like water flow upward in the vertical direction from the lower header are arranged on a lower surface side of the hot rolled steel plate such that jetting lines from the lower cooling water jetting nozzles penetrate the upper drain outlets formed in the upper dividing wall.