The barrel screw and hollow shaft of the mini cement plant are broken. In the process of connecting the barrel and the hollow shaft of the mini cement plant, the barrel needs to have a through hole with the flange, and the pin is connected by a turnbuckle, and the through hole only needs to be connected with ordinary screws. , in which the hinged hole is mainly used for limit and positioning. 

After the mini cement plant runs for a long time, due to thermal expansion and cold contraction, distortion, high temperature corrosion, water vapor corrosion, etc., the matching size of the pin hole and the reaming hole will change, and there will be looseness, which makes it difficult to realize the position limit. 

Due to the twisting, the screw begins to loosen, causing periodic dislocation of the cylinder and the hollow shaft. If the screw is stretched for a long time, it will cause the screw to break. According to years of experience, after such a fault occurs, the screw can be changed to a hinged pin for connection. At present, the hinged pin has not been broken.