Detection device for large diameter of inner sinking groove

The utility model discloses an inner sinking groove large diameter detection device, which comprises a mounting plate and a pipeline body, a guide through groove is arranged on the outer wall of one side of the mounting plate, the inner wall of the guide through groove is in sliding connection with a circle center positioning mechanism, a guide sleeve is arranged on the outer wall of one side of the mounting plate, and the inner wall of the guide sleeve is in sliding connection with a push rod. An L-shaped rod is fixed to the outer wall of one side of the push rod, a mounting block is fixed to the outer wall of one side of the L-shaped rod, infrared distance measuring sensors are arranged on the outer walls of the upper side and the lower side of the mounting block correspondingly, an inner sinking groove body is formed in the inner wall of the pipeline body, and a control panel is fixed to the outer wall of the top of the mounting plate and electrically connected with the infrared distance measuring sensors.