Powder return pipeline device of metal 3D printing equipment

The invention discloses a metal D printing equipment powder return pipeline device. The device comprises a printer shell, a printing platform is arranged in the printer shell, a mounting frame is slidably connected to the left side of the printing platform through a sliding block, a first scraper blade is fixedly connected to the upper portion of the mounting frame, and a dust collecting hopper isarranged on the right side of the printing platform, a wheel roller is arranged in the middle of the upper portion of the dust collecting hopper, the outer surface of the wheel roller is fixedly connected with a brush, the printing platform is fixedly connected with a second scraper blade corresponding to the right side of the wheel roller, and a first motor is fixedly installed on the right sideof the printer shell. By arranging the mounting frame, the connecting position of the thin rope is changed to the side face, the thin rope cannot affect the printing effect during printing, meanwhile, the mounting frame can e