Retractable hydrogen-oxygen cutting preheating edge searching device

The utility model discloses a retractable hydrogen-oxygen cutting preheating edge searching device, which adopts a touch hammer and a touch hammer connecting arm, a guide transmission device is fixed on the touch hammer connecting arm, one end of the touch hammer is connected with a chain, and one end of the chain is fixed on a fixed seat after diffracting the guide transmission device. The bumping hammer makes contact with the edge of a steel billet, the bumping hammer connecting arm fixedly connected with the cutting trolley serves as a mounting structure of the guide transmission device, the axis of the guide transmission device is perpendicular to the moving direction of the cutting trolley, the bumping hammer connecting arm moves along with the cutting trolley, and one end of the chain diffracted on the bumping hammer connecting arm is fixed. Therefore, the bumping hammer can rise in a self-service mode during cutting movement, the bumping hammer is prevented from touching a high-temperature steel billet