New type bearing box sealing device for closed vertical type bar rolling mill

The utility model relates to a (b) new type bearing box sealing device for a closed vertical type bar rolling mill (/b) (b). The sealing device (/b) (b) comprises a bearing box located on an end face of a roller, a (/b) bearing box end cover in a spherical surface shape is arranged on the bearing box, a labyrinth ring is arranged between the bearing box and the roller, and two ends of the labyrinth ring are provided with a conical surface retaining collar respectively. When iron oxide scale exists, the iron oxide scale cannot enter the bearing box with a better sealing effect, so that lubricating grease is protected from being polluted, occurrence of accidents caused by bearing burning is reduced, operation rate of the rolling mill is raised, consumption of the roller and a bearing is reduced, and remarkable economical benefits are obtained.