| 摘要 |
PURPOSE:To control cooling of a metallic strip easily over a wide range by hollowing cooling rolls, ejecting cooling water from the nozzles provided in the hollow part and cooling the inside wall surfaces of the rolls. CONSTITUTION:A metallic strip 1 is put on around >=1 piece of cooling roll bodies 2, and cooling water is fed forcibly from a tank 13 by a pump 12 and is ejected through a flow rate control valve 11 and a supply pipe 5 out through spraying nozzles 14 toward the inside walls of the roll bodies. The cooling water stuck on the inside wall surfaces of the body 2 in the form of small water drops evaporates to steam by the heat transmitting through the walls of the bodies 2 through the strip 1 and discharges to the outside through an outlet pipe 7 by depriving the walls of the heat of evaporation. The wall temp. of the bodies 2 is detected with a detecting end 9, and the opening of the valve 11 is controlled with a signal converter 10, whereby the wall temp. is maintained at a required temp. The wall temp. is easily controlled over a wide range. |
