Inlet guide positioning device

The invention relates to an inlet guide and guard positioning device which comprises a fixing frame, a worm and gear structure, a guide roller and a guide roller shaft. The worm and gear structure is arranged at the top of the fixing frame; a connecting hole with a rectangular section is formed in the center of a worm gear; the guide roller shaft comprises a locking section, a connecting section, an upper transition section, a middle section and a bottom fixing section from top to bottom, the connecting section is of a cuboid-shaped structure, the other parts of the guide roller are all of a cylindrical structure, the connecting section is embedded into the worm wheel to achieve locking of the guide roller shaft and the worm wheel, and external threads are arranged on the side face of the locking section. A first fixing nut is screwed into the locking section to lock the guide roller shaft and the worm gear, a first middle sleeve connected with the fixing frame is arranged outside the transition section to as