Annular coaxial powder feeding type nozzle device for laser processing

The invention discloses an annular coaxial powder feeding type nozzle device for laser processing. The annular coaxial powder feeding type nozzle device comprises a locking ring, a nozzle inner ring, a nozzle outer ring and a ring base. The outer surface of the nozzle inner ring sequentially comprises a conical surface powder outlet section, a powder diverging section and a threaded connection section; the threaded connection section is in threaded connection with the upper port of the ring seat; when the nozzle inner ring is rotated, the distance between the nozzle inner ring and the nozzle outer ring is changed, so that a gap between the outer surface of the conical powder outlet section and the conical cavity is adjusted; after a gap between the outer surface of the conical surface powder outlet section and the conical cavity is determined, the conical surface powder outlet section is positioned by screwing the locking ring. By the adoption of the structure, the gap between the outer surface of the conical