| 摘要 |
PURPOSE:To obtain an economical device, by forming an upper pipe laminer header by alternately arraying pipe laminar headers of a small diameter and a large diameter, and forming a lower spray header by alternately arraying spray headers of a small capacity type and a large capacity type. CONSTITUTION:To a steel plate to be cooled, which is made to pass through in one direction after finish rolling or hot leveling, an upper pipe laminer header and a lower spray header are made to correspond, and cooling is executed. The upper pipe laminer header is constituted of such two kinds as an upper pipe laminer header 3 for weak cooling to the small diameter side and a strong cooling pipe laminar header 4 of the large diameter side, and the weak cooling header 3 and the strong cooling header 4 are arrayed alternately in each due order in the plate passing direction. Also, on the lower part between carrying rolls 7-, a weak cooling sprary header 8 and a strong cooling spray header 9 are arrayed orthogonally in each due order in the plate passing direction, and in each lengthwise direction, a weak cooling spray nozzle 10 and a strong cooling spray nozzle 11 are arrayed. |
