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

Abstract

A water supply control method for an ultra-rapid cooling system of a hot continuous rolling line belongs to the technical field of hot strip rolling. Including: Step 1: Calibrate the hydraulic coupling opening degree-pumping station flow curve; Step 2: Determine whether the strip head has reached the speed increase point. If so, the rolling line will send the set pressure and total flow rate to the pumping station. Perform step three; if not, perform step two; step three: Determine whether the set pressure and set total flow rate sent by the rolling line to the pump station meet the set range. If so, open the ultra-fast cold header and the pump station will start the flow rate. Ring control and increase the speed, perform step four; if not, alarm; Step four: Determine whether the speed increase process is completed, if so, use the fuzzy PID control method to dynamically adjust the rolling line pressure; if not, perform step four; Step Five: Determine whether the tail end of the strip leaves the ultra-fast cooling zone. If so, the flow open-loop control is disconnected, the pump station is slowed down to the base speed, and the rolling line pressure dynamic adjustment closed loop is disconnected; if not, step 5 is performed.

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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