Powder return pipeline device of metal 3D printing equipment

The utility model relates to the technical field of metal 3D printing equipment powder returning, in particular to a metal 3D printing equipment powder returning pipeline device which comprises a device body and an operation table, the device body is installed on the left side of the operation table, and a powder returning cavity is formed in the device body. A powder collecting drawing box is installed on the left side of the device body and embedded into the powder returning cavity, a U-shaped clamping base is installed on the upper side of the interior of the powder returning cavity, a dust filter plate is installed on the left side of the device body and embedded into the inner side of the U-shaped clamping base, and a powder suction cover is embedded into the right side of the device body and close to the upper side of the operation table. A pipeline is installed at the end, penetrating through the interior of the powder return cavity, of the powder suction cover, and a draught fan is installed at the po