Roller cooling system and cooling control method thereof

Abstract

The invention discloses a roller cooling system and a cooling control method thereof. The roller cooling system adopts a system combined with exterior cooling and interior cooling, and the roller cooling control method is realized through a feedback-control loop consisting of a series of instrument equipment and a closed loop control system consisting of roller cooling control models. With the use of the method, the roller surface temperature and the roller interior temperature can be detected, fed back and calculated, moreover, each area of the roller surface is controlled alone through the closed loop control system; the heat convexities in the radial direction of the roller and in the peripheral and axial directions of the roller surface can be effectively controlled; the heat shock is reduced; and the service life of the roller is effectively prolonged by more than one time according to the field application statistics. The control models are simple and convenient to set and adjust, can precisely control the roller surface aerosol cooling injection amount, and guarantees no affection of rolling mill coolant on the surface quality of a continuous casting billet in the rolling mill position.

Description

technical field [0001] The invention relates to a roll cooling system and a cooling control method thereof, in particular to a cooling system and a cooling control method of a roll applied in a continuous casting environment for low-speed, high-temperature, high-pressure rolling. Background technique [0002] The cooling technology of the roll has an important influence on the wear, thermal crack and spalling of the roll. At present, there is no large roll cooling control technology applied in the continuous casting environment. The invention patent application CN102189102A submitted on March 9, 2010 and the utility model patent CN202021199U submitted on December 3, 2010 disclose a liquid core large reduction rolling mill. It is the key to restricting the development of technology and reducing the cost. How to precisely control the temperature of this roll is still a blank. The continuous casting environment is different from the ordinary steel rolling environment. If the ...

AI Technical Summary

Problems solved by technology

There is no large roll cooling control technology applied in the continuous casting environment

The invention patent application CN102189102A submitted on March 9, 2010 and the utility model patent CN202021199U submitted on December 3, 2010 disclose a liquid core large reduction rolling mill. It is the key to restricting the development of technology and reducing costs. How to accurately control the temperature of this roll is still a blank

The continuous casting environment is different from the ordinary steel rolling environment. If the roll surface is directly sprayed with water to cool it, it will cause various quality defects of the continuous casting slab

In related technical fields, such as aluminum casting rolls, although some cooling methods are also used, most of them are open-loop and extensive modes, without precise closed-loop control of the roll temperature curve.

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