Light path window mirror protection device of selective laser melting forming equipment

The invention relates to a light path window mirror protection device for selective laser melting forming equipment, and belongs to the field of additive manufacturing equipment. Comprising a shell, a flow equalizing plate and a protective gas inlet, wherein the shell is of a horizontally placed cuboid structure; a special-shaped cavity is formed in the shell; the flow equalizing plate is of a cuboid plate-shaped structure; the flow equalizing plate is vertically arranged in the special-shaped cavity; the protective gas inlets are axially, horizontally and uniformly formed in the side wall of the shell, and each protective gas inlet is communicated with the special-shaped cavity; butt joint grooves are formed in the side walls of the two ends of the shell respectively; the shell is installed at the external light path window mirror through the butt joint groove, the shielding gas inlet is axially parallel to the mirror face of the external light path window mirror, and airflow protection of the external light