Redundancy control method for flame cutting system of continuous casting machine

The invention belongs to the technical field of continuous casting of steel and iron, and relates to a redundancy control method for a flame cutting system of a continuous casting machine, which is characterized in that a time control program is added in an optimized logic control program by taking a flame cutting machine clamping signal as a reference, and cutting end electrical limit is replaced by taking the flame cutting machine clamping signal as the reference and matching with delay time. A holding clamp loosening signal of the flame cutting machine is used as a reference to be matched with different delay times to replace cutting machine swing gun initial electrical limiting and cutting machine original electrical limiting. Whether each simulation electrical limit is put into use or not can be put into or removed from an HMI picture, and the delay time can be adjusted on the HMI picture in real time according to different production working conditions. After any electrical limit of the flame cutting machine breaks down, the limit can be quickly simulated for use, the on-line first-aid repair operation time can be shortened by 30 minutes per time, the potential safety hazard of high-temperature on-line first-aid repair is thoroughly solved, and the stability of continuous production of a casting machine is effectively guaranteed.