Water supply control method for ultra-rapid cooling system of hot continuous rolling line

Abstract

The invention relates to a water supply control method of a hot continuous rolling line ultra fast cooling system and belongs to the technical field of hot-rolled strip steel rolling. The water supply control method includes the following steps that: step one: the opening degree of a hydraulic coupler, namely, the flow curve of a pump station, is calibrated; step two: whether a strip steel head portion achieves a speed rise point is judged, if the strip steel head portion achieves the speed rise point, a rolling line transmits set pressure and total flow to the pump station, and step three is executed, otherwise, the step two is executed; step three: whether the set pressure and the set total flow which are transmitted to the pump station by the rolling line satisfy a set range is judged, if the set pressure and the set total flow satisfy the set range, an ultra fast cooling header is opened, and flow open-loop control and speed increase are performed on the pump station, and step four is executed, otherwise, alarming is performed; step four: whether the process of the speed increase is completed or not is judged, if the process of the speed increase is completed, a fuzzy PID control method is adopted to perform rolling line pressure dynamic regulation, otherwise, the step four is executed; and step five: whether a strip steel tail portion leaves an ultra fast cooling area is judged, if the strip steel tail portion leaves the ultra fast cooling area, the flow open-loop control is disconnected, the speed of the pump station is decreased to base speed, and a rolling line pressure dynamic regulation closed loop is disconnected, otherwise, the step five is executed.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled strip steel rolling, and in particular relates to a water supply control method for a water supply pumping station of an ultra-fast cooling system of a hot continuous rolling line, so as to ensure the stability of pressure and flow of the water supply system and achieve energy saving The purpose of reducing consumption, stabilizing the system, and reducing the impact of the pipeline system. Background technique [0002] The ultra-fast cooling system for hot-rolled strip steel uses high-pressure, large-flow cooling water to cool the strip steel, thereby realizing the ultra-rapid cooling process of the strip steel. Through the precise control of cooling path and strip temperature, reasonable strengthening mechanism can be used to realize strip reduction production. In order to complete the precise control of the cooling path and strip temperature, it depends on the precise control of the pressur...

AI Technical Summary

Problems solved by technology

Excessive water flow from the water supply pump station to the site will cause excessive water flow in the bypass pipeline and affect pressure stability; too small water flow will result in insufficient cooling water for strip cooling and reduce the cooling performance of ultra-fast cooling ability

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