R2 guiding position protection device

The utility model relates to a R2 guiding position protection device, which belongs to the technical field of steel rolling. The device comprises a fixed solid (2), a proximity switch (3), a separation blade (4) and an open pore (6). The fixed solid (2) is fixed on a hydraulic cylinder (1). An iron sheet is arranged on the hydraulic cylinder (1). The iron sheet is provided with the open pore (6) for installing the proximity switch (3). The separation blade (4) is arranged on a R2 guiding position and is in hard link with the R2 guiding position. The R2 guiding position protection device is suitable for a rough rolling R2 guiding position device, has the advantages of detecting the position of the R2 guiding position in advance, avoiding the R2 guiding position being hit, guaranteeing the successful production of the rolling line and also having high cost-performance ratio and simple manufacturing.