Patent ID: 8353191

Claim:
A hot-strip cooling device for cooling a hot strip conveyed on a run out table after finish rolling, the cooling device comprising: an upstream section provided at an upper side of the strip and comprising a plurality of rows of first cooling nozzles that eject rodlike flows of coolant, wherein each row extends in a width direction of the strip, and the plurality of rows are arranged along a traveling direction of the strip; and a downstream section provided at the upper side of the strip downstream of the upstream section in the traveling direction of the strip and comprising a plurality of rows of second cooling nozzles that eject rodlike flows of coolant, wherein each row extends in the width direction of the strip, and the plurality of rows are arranged along the traveling direction of the strip; wherein the first cooling nozzles are inclined towards a downstream side in the traveling direction of the strip, and are inclined to eject the rodlike flows of coolant to an upper surface of the strip such that the rodlike flows are at an angle of 45-60° with respect to the upper surface of the strip; wherein the second cooling nozzles are inclined towards an upstream side in the traveling direction of the strip, and are inclined to eject the rodlike flows of coolant to the upper surface of the strip such that the rodlike flows are at an angle of 45-60° with respect to the upper surface of the strip; wherein the upstream section and the downstream section are opposed to each other; wherein the upstream section is arranged upstream of a strip-conveying roller table, and the first cooling nozzles are inclined such that the rodlike flows are ejected from positions upstream of the roller table to positions vertically just above the roller table; and wherein the downstream section is arranged downstream of a strip-conveying roller table, and the second cooling nozzles are inclined such that the rodlike flows are ejected from positions downstream of the roller table to positions vertically just above the roller table.