The expansion joint of the ceramic slag discharge slurry valve is composed of a bellows and two structural parts. It absorbs the axial displacement of the pipeline through the flexible deformation of the bellows (at the same time, it can also absorb part of the lateral displacement). Its two ends are connected with the pipeline. In order to ensure the rigid support of the bellows during the transportation of the expansion joint, transportation fixing bolts are often installed, and the products are removed after installation. Instructions for use: this type of ripple compensator is mainly used to compensate axial displacement, and it can also compensate lateral displacement or axial and lateral combined displacement with small magnitude. It has the ability to compensate angular displacement, but it is generally not used to compensate angular displacement. The compensation amount of this series of products is single-layer bellows. If double-layer or multi-layer bellows are used, the compensation amount can be greatly increased. The pull rod in the middle of the connecting pipe is to ensure the rigid support of the bellows during the transportation and installation of the compensator. After installation, the fixed bolts must be loosened.