Grinding roller protecting sleeve of vertical grinder

The invention discloses a grinding roller protecting sleeve of a vertical grinder, and belongs to the technical field of vertical roller grinding. The protecting sleeve comprises a conical protecting sleeve body, a cylindrical protecting sleeve body, a protecting ring and a flange plate. The flange plate is connected to the end, with a large diameter, of the conical protecting sleeve body. A connecting hole connected with a grinding roller is formed in the flange plate outside the conical protecting sleeve body. The cylindrical protecting sleeve body is connected to the end, with a small diameter, of the conical protecting sleeve body. The protecting ring is connected with the outer surface of the flange plate. The protecting ring surrounds the outer side of the connecting hole. The protecting sleeve is simple in structure, good in sealing effect, long in service life, convenient and rapid to maintain and replace, reliable in use, and capable of effectively protecting a grinding roller rotating shaft.