| 摘要 |
A nozzle header for cooling plates according to the invention comprises a lower cylindrical header to a lower header chamber therein and having cooling water supply means for supplying a cooling water into the lower header chamber, an upper header in the form of a roof mounted on the lower cylindrical header therealong to form an upper header chamber therein substantially triangular in section communicating with the lower header chamber through apertures formed in an upper wall of the lower cylindrical header, and nozzles extending through the lower header chamber and having upper ends communicating with the upper header chamber and lower ends in the form of nozzle outlets for jetting the cooling water against a surface to be cooled. The nozzle header can jet the cooling water with violent penetrating and stirring forces within an adjustable wide flow rate range to perform a sufficient cooling and can instantaneously stop the jetting cooling water at a desired time to obtain heat treated steel plates superior in quality. |
