Ultrafast cooling system after rolling for hot rolled strip steel production line

Abstract

The invention discloses an ultrafast cooling system after rolling for a hot rolled strip steel production line. 2 groups of cooling devices consisting of cooling manifolds in different structures are arranged in turn along the steel plate rolling operation direction of a rolling line, and each group is provided with 8 to 10 rows of paired cooling manifolds. The system is characterized in that: flat jet flow manifolds and high density jet flow manifolds are combined in rows, wherein the high density jet flow manifolds are positively inclined, vertical, negatively inclined and in an edge combined vertical inclined mode, and are used independently or combined; various manifolds are correspondingly arranged on the upper and lower parts of a roller bed vertical to the length direction of the rolling line; upper and lower cooling manifolds are directly connected with a high pressure water supply pipe through a control valve bank and pipelines; the control valve bank can independently regulate and read the water flow of a water injection nozzle of each cooling manifold; and the water injection nozzles of the upper and lower cooling manifolds form various angles with the cooled strip steel. The system is favorable for uniform cooling and water sealing of steel plates, and realizes reasonable cooling speed control and temperature precision control of the strip steel.

Description

technical field [0001] The invention relates to the technical field of post-rolling cooling of metal processing hot-rolled steel strips, in particular to an ultra-rapid cooling system for a hot-rolled steel strip production line. Background technique [0002] The post-rolling cooling equipment for hot-rolled strip steel adopts different equipment arrangements on the output roller table to meet the different cooling speed, coiling temperature and other temperature control requirements of the strip steel, so as to cooperate with the hot rolling process to effectively control the mechanical properties of the strip steel . The post-rolling cooling process has become one of the key links in the production of hot-rolled strip steel. The capacity of the cooling device, cooling intensity, cooling speed, coiling temperature and its control accuracy all have a very important and direct impact on the quality and performance of the final product. [0003] At present, according to the ...

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Problems solved by technology

[0003] At present, according to the production process of special hot-strip steel products, the hot-rolled strip is required to be rapidly cooled from 800-1000°C to a temperature of 550-750°C after rolling, and then cooled to the coiling temperature range by adopting an appropriate cooling rate. , while the current conventional flow and short-flow production lines generally use laminar flow cooling devices for cooling after rolling. Due to their low cooling capacity, they can no longer meet the production needs of hot-rolled strip steel with special cooling requirements.

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