METHOD AND APPARATUS FOR CONTROLLING THE STRIP TEMPERATURE OF THE RAPID COOLING SECTION OF A CONTINUOUS ANNEALING LINE.

摘要

The present invention relates to a method and apparatus for uniformly controlling the strip temperature of the rapid cooling section of a continuous annealing line, and provides same. Cooling nozzle blocks for controlling the strip temperature are each installed in plurality on the front and back surfaces of a strip, wherein multiple sets are installed partitioned into lengthwise direction flow control nozzle blocks and widthwise direction flow control nozzle blocks; a strip center temperature measurer and a widthwise direction temperature measurer are installed at the intake and discharge sides of the rapid cooling section; and the temperature detection values obtained from the strip center temperature measurer and the width direction temperature measurer are used to respectively control the spraying of mist for the lengthwise direction flow control nozzle blocks and the widthwise direction flow control nozzle blocks in order to uniformly control the strip temperature and minimize changes in the evenness of the strip. According to the present invention, a widthwise direction temperature measurer is used at the intake end and at the discharge end of the rapid cooling section of the continuous annealing line to detect temperature, and feedback and feedforward control is used to uniformly control the widthwise direction temperature of a strip through the control of mist spraying in the widthwise direction of the rapid cooling section, in order to obtain the favorable effects of being able to minimize changes in the evenness of the strip.