Hot rolled steel sheet cooling apparatus

摘要

A hot rolled steel sheet cooling apparatus includes a gradual cooling header 2 including a rod-like cooling water nozzle 3 for gradual cooling and a rapid cooling header 4 including a rod-like cooling water nozzle 5 for rapid cooling such that the headers constitute a cooling unit 9. The cooling unit 9 includes an elevating unit 7 capable of moving upward and downward in unison with the cooling unit. In cooling the upper surface of a hot rolled steel sheet (hot rolled steel strip or steel plate), uniform and stable cooling is achieved while both of high cooling rate and low cooling rate are ensured.

主权项

1. A cooling apparatus for cooling a hot rolled steel sheet, comprising:
a cooling unit including:
a gradual cooling header including a rod-like cooling water nozzle for gradual cooling; anda rapid cooling header including a rod-like cooling water nozzle for rapid cooling;wherein the gradual cooling header and the rapid cooling header together comprise the cooling unit; and an elevating unit coupled to the cooling unit, the elevating unit being configured to move the cooling unit, such that the gradual cooling header and the rapid cooling header move in unison, upward and downward with respect to a surface of the hot rolled steel sheet to a first distance for gradual cooling of the hot rolled steel sheet with the gradual cooling header and to a second distance for rapid cooling of the steel sheet with the rapid cooling header.