Separating type iron notch drill rod

The utility model relates to the technical field of blast furnace equipment, and discloses a separating type taphole drill rod which comprises a main drill rod, an auxiliary drill rod is movably installed on the right side of the main drill rod, a drill bit front end is fixedly installed at the right end of the auxiliary drill rod, and a cold air inlet is fixedly formed in the middle of the main drill rod. A tapping machine connector is fixedly arranged at the left end of the main drill rod, a movable cylinder clamping sleeve is movably installed at the outer end of the main drill rod, a rubber hose is fixedly installed in the movable cylinder clamping sleeve, and a spring is fixedly installed in the movable cylinder clamping sleeve and located in the middle of the rubber hose. When the separating type iron notch drilling rod is used, a large amount of drilling rod cost can be saved, the iron notch depth can be accurately detected, the iron notch drilling speed is controlled through stress, the abnormities su