Method for setting flow of hot rolling cooling system

Abstract

The invention discloses a method for setting flow of a rolling cooling system, wherein the method comprises the following steps: 1) determining direct proportional function of medium flow and collector opening degree needed by the process of each cooling collector, medium flow=k*collector opening degree +b, wherein k and B are constants capable of being determined according to the medium flow needed by the process and the property of performing mechanism; 2) calculating the collector opening degree by the function determined in the step 1) according to a predetermined flow value, and transmitting the control parameter needed by the collector opening degree to an executing mechanism to execute; and 3) carrying out fuzzy adjustment for the medium flow by flow PID (process identification) in order to keep the actual medium flow at the predetermined flow, and carrying out fuzzy adjustment to the pressure of a shunt collector by pressure PID during the whole process. The method of the invention improves the hit rate and property evenness of the band steel by the high precision control of the medium flow of the collector of the cooling zone, solves the problem that the head of the band steel is cooled unevenly during the cooling process, achieves the precision control of temperature of the head and whole roll in a rolling direction, and effectively improves the yield of the band steel.

Description

technical field [0001] The invention belongs to the technical field of steel rolling automation, in particular to a method for quickly and accurately setting the flow rate of a hot rolling cooling system. Background technique [0002] The temperature uniformity control in the cooling process is an important issue in the strip cooling process. Especially the steel plate head, there is generally the problem of uneven cooling of the head, especially under the premise of using ultra-rapid cooling technology, and the temperature control accuracy of the strip head has a great influence on the cooling uniformity of the head of the strip and the whole coil, and the hot-rolled strip It has an influence on the smooth production of steel and the uniformity of properties. If the flow rate of the ultra-fast cooling header cannot be stabilized quickly and accurately, when the strip head passes through the ultra-fast cooling, it will cause uneven cooling of the strip head, and the control...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of high-precision control of the head temperature and cooling uniformity in the direction of the strip rolling line in the strip cooling process under the use of ultra-rapid cooling technology, in order to realize the fine control of the head temperature and the whole coil of strip steel The high-precision control of temperature provides a fast and precise control method

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