Cooling device used for hot-rolled strip production line

Abstract

The invention discloses a cooling device used for a hot rolled strip production line which comprises a roller way on which hot rolled sheets to be cooled are placed. The cooling device comprises an ultra-fast cooling device and a laminar flow cooling device, wherein the ultra-fast cooling device comprises a plurality of ultra-fast cooling water spraying upper collecting pipes and a plurality of ultra-fast cooling water spraying lower collecting pipes; the ultra-fast cooling water spraying upper collecting pipes are arranged sequentially and are perpendicular to the hot rolled strip production line; the ultra-fast cooling water spraying lower collecting pipes are arranged in the gaps of the roller way; the laminar flow cooling device comprises a high cistern, a shunting and collecting pipe, a laminar flow cooling upper collecting pipe and a laminar flow cooling lower collecting pipe; the high cistern and the shunting and collecting pipe are arranged up and down; and the high cistern, the shunting and collecting pipe, the laminar flow cooling upper collecting pipe and the laminar flow cooling lower collecting pipe are connected with each other through distribution pipes. The cooling device used for the hot rolled strip production line can cool hot rolled sheets quickly and evenly to meet the production demands of special steel grades, is beneficial to form industrial scale and has significant productive practice meaning.

Description

technical field [0001] The invention relates to post-rolling cooling technology for a hot-rolled strip steel production line in the technical field of metal processing, in particular to a cooling device for a hot-rolled strip steel production line. Background technique [0002] At present, for the production line of hot-rolled strip steel, different cooling rates are usually required to obtain the required structure and properties of the hot-rolled strip steel after rolling. For the production process of a new type of hot-rolled strip steel, it is necessary to rapidly cool the hot-rolled steel from 800-1000°C to a temperature range of 600-700°C after rolling, and then cool it to the strip coil by adopting an appropriate cooling rate. Take the temperature range. In the current conventional process and short-process production lines, laminar flow cooling devices are generally used to cool hot strips after rolling, but the cooling capacity of laminar flow cooling devices is lo...

AI Technical Summary

Problems solved by technology

The main problem of this rapid cooling device is: the cooling water that vertically hits the surface of the steel plate has poor fluidity on the surface of the steel plate in a short period of time, and is easy to stay on the surface of the steel plate, and the cooling water that stays on the surface of the steel plate is easy to form a vapor film on the surface of the steel plate. The transitional boiling heat transfer of water will cause uneven cooling, so that the final formed hot-rolled strip steel plate is prone to large deformation, which seriously affects the production quality of hot-rolled strip steel

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