Patent ID: 6733720
Filing Date: 2004-05-11
Classification: B21B,C21D

Abstract:
An apparatus for cooling a hot rolled steel strip, comprising:(a) a runout table to transfer a hot rolled steel strip on plural rotating transfer rolls, (b) a cooling means for cooling the resultant transferred hot rolled steel strip arranged at the runout table, and (c) a water breaking means arranged just above the transfer rolls at the inlet, or outlet, or at the inlet and outlet of the cooling means in parallel with the transfer rolls and with a clearance to the steel strip, said cooling means comprising: (i) at least one upper surface cooling means, arranged at an upper surface of the transferred hot rolled steel strip, for ejecting cooling water and cooling the upper surface of the hot rolled steel strip; and (ii) at least one lower surface cooling means, arranged at the lower side through the transferred hot rolled steel strip, for ejecting cooling water and cooling the lower surface of the hot rolled steel strip; the upper surface cooling means and the lower surface cooling means being arranged to face each other through the hot rolled steel strip; the upper surface cooling means comprising nozzles for ejecting cooling water to form an upper laminar flow; the lower surface cooling means comprising nozzles for ejecting cooling water to form a lower laminar flow; the upper surface cooling means and the lower surface cooling means ejecting cooling water such that the upper laminar flow and the lower laminar flow are substantially symmetric with respect to the steel strip.