| 摘要 |
PURPOSE:To freely control the injecting pressure of water, and to uniformly and efficiently cool a sheet material, by forming an overflow weir on the wall surface of a header storing the cooling water, and providing a flow rate controlling gate to the wall opposing to said wall. CONSTITUTION:In a cooling device for steel sheet, an overflow weir 16 is formed at the upper part of an oblong header 12 storing cooling water, and a slit nozzle is formed at the lower part of the header 12 to spray the overflowed cooling water 11 on the surface of a hoop. A flow rate controlling gate 18 is attached in a freely liftable state to the wall of the header 12 opposing to the overflow weir 16 to control the flow-down rate of the cooling water 11 contained in the header 12. The cooling water 11 overflowed from the gate 18 is discharged to the outside from a water discharging tank 19 attached to the header 12. Accordingly, an extremely small water pressure to form the cooling water flowing down from a slit nozzle 17 into a slit-shaped laminar flow can be set. |
