Pre-embedded exposed reinforcing steel bar protection component for constructional engineering

The invention provides a pre-embedded exposed reinforcing steel bar protection component for constructional engineering. The problem that the service life of the pre-embedded exposed reinforcing steel bar protection component manufactured according to the dynamic mechanical friction rust removal principle is short is solved. The component comprises oil absorption cotton wound on the exposed section of a pre-embedded reinforcing steel bar, a clamping sleeve is arranged on the outer side of the oil absorption cotton, external threads are arranged on the outer side wall of the clamping sleeve, and the length of the clamping sleeve is larger than or equal to that of the exposed section of the pre-embedded reinforcing steel bar. A sleeve is arranged outside the clamping sleeve, an internal thread I in threaded connection with the outer side wall of the clamping sleeve is arranged on the inner wall of the sleeve, and the clamping sleeve is fixed by the sleeve after pressing the oil absorption cotton. One end of the