Patent ID: 8715565
Filing Date: 2014-05-06
Classification: B21B,C21D

Abstract:
1. A cooling system that cools hot rolled long steel bar, comprising a plurality of chambers that are arranged along the longitudinal direction of the rolled steel bar, the plurality of chambers each provided with: a blow outlet that, facing from the chamber to the rolled steel bar, blows out compressed gas for cooling that is introduced to the chamber from a gas inlet that is connected to the chamber; a cooling water supply nozzle that supplies cooling water into the chamber; a nozzle plate that is provided at the blow outlet so as to face the rolled steel bar, and that has a plurality of nozzle holes for spraying a cooling medium that is produced by mixing the cooling water and the compressed gas for cooling; and a rectifying plate that is provided between the gas inlet and the cooling water supply nozzle so that the compressed gas for cooling that is introduced from the gas inlet disperses throughout an entire chamber, and so that a droplet flow rate distribution of the cooling medium that is sprayed toward the rolled steel bar from the nozzle plate becomes uniform along the longitudinal direction of the rolled steel bar; wherein a gap is formed between the rectifying plate and inner walls of the chamber, and the cooling system sprays the cooling medium that is produced by mixing the cooling water that is supplied from the cooling water supply nozzle and the compressed gas for cooling that passes through the gap and disperses throughout the entire chamber toward the rolled steel bar through the nozzle holes of the nozzle plate, and thereby the surfaces of the rolled steel bar is cooled uniformly.