1.The bolt rod of the universal expansion joint is a transportation tie rod. It is mainly used to prevent the bellows from being impacted during transportation and to prevent the weld from cracking due to vibration during transportation. In addition, it is generally not canceled after installation (if the manufacturer applies yellow paint on the screw, it means Can be removed) Instead, the bolts should be loosened according to the amount of expansion. Expansion joints generally have an expansion limit, otherwise the expansion joints will be damaged without restriction.
2.The screw of the large and small tie rod bellows compensator cannot be removed, because it not only has to limit the position, but also prevents additional blind plate force.
3. The tie rod on the universal compensator cannot play a fixed role, and the main function of the tie rod is for pre-stretching.
4. Some of the tie rod devices that come with the corrugated compensator need to be dismantled, and some do not need to be dismantled. The structure of the corrugated compensator is different for different models. The tie rod of the axial corrugated expansion joint needs to be removed after installation. It is equipped with tie rods to prevent the corrugation of the compensator from being deformed or collapsed due to severe impact during transportation, which is to protect the corrugation. The role of. Once installed, it needs to be removed immediately before it can work normally. Otherwise, the corrugated pipe cannot be compressed or stretched, and it will not be able to protect the pipe. Axial compensators for removing the tie rod include: axial internal pressure compensator, direct-buried compensator, and axial external pressure compensator.
5. However, the tie rods of some corrugated expansion joints cannot be removed, such as large tie rod transverse expansion joint, small tie rod transverse expansion joint, straight pipe pressure balance expansion joint, and axial type compound tie rod expansion joint. Because the tie rod in the expansion joint product not only has the function of limit expansion and contraction, but also prevents the damage of the corrugation caused by the additional blind plate force. If the pull rod is removed by mistake, it will cause hidden dangers. You can communicate with the manufacturer’s technicians before installation to avoid major liability accidents.
