Auxiliary device for powder vacuum spraying of double-sealing-face drill rod

The utility model relates to an auxiliary device for vacuum powder spraying of a double-sealing-face drill rod, which is used for performing vacuum spraying on the double-sealing-face drill rod to protect an inner sealing face and an outer sealing face of the double-sealing-face drill rod and comprises a protective sleeve, one end of the protective sleeve abuts against the inner sealing face of the double-sealing-face drill rod, and the other end of the protective sleeve is combined with a horn sleeve of a powder supply device. The protective sleeve comprises a stretching-in section and a connecting section which are sequentially connected in the axial direction, the stretching-in section and the connecting section are hollow and form a transition channel for connecting a to-be-sprayed area in the double-sealing-face drill rod and the powder supply device, the stretching-in section stretches into the double-sealing-face drill rod and is provided with an inner sealing protective face covering the inner sealing