The tightness of the tie rod screw of the expansion joint is crucial for the proper operation and safety of the expansion joint. Here are some key points about the tightening of the expansion joint tie rod screws:
Effects of overtightening: If the tie rod screw is too tight, it may cause the expansion joint to not work properly and may even be damaged. An overly tight screw can increase the stress on the expansion joint, which can cause material fatigue, cracking, or fracture.
Effects of overloosening: If the tie rod screws are too loose, the expansion joint may not perform its due compensatory role, causing leaks, vibrations, or other problems in the pipeline system. In addition, too loose screws may also cause the expansion joint to move or deform when subjected to pressure or temperature changes.
Judge the tightness：
Observe the appearance: The degree of tightness can be judged by observing the surface flatness of the fastening nut. If the surface flatness is high, it means that the pressure is high, that is, the tightness is high.
Use Tools: Tools such as a wrench or socket can be used to detect the tightness of the expansion screw. If it is smooth when tightening the nut by hand and then tightening it secondarily with a tool, it means that the tightness is appropriate.
Use a torque wrench: This is the more precise approach. Find the relevant torque criteria based on the model and specification of the expansion screw, and use a torque wrench to adjust the expansion screw to the correct torque value before installing it. When the set torque is reached, the torque wrench automatically bends or emits an audible cue.
Debugging Skills: When adjusting the tightness of the tie rod screw, it needs to be carried out according to the specific situation. A wrench can be used to rotate the bolt and check the tightness of the bolt one by one. At the same time, the range of degrees of freedom of the expansion joint can be forcefully tested to check whether the tightness of the bolt is appropriate.
In conclusion, ensuring that the tie rod screw of the expansion joint is in a proper tight state is the key to ensuring its proper operation and safety. During the adjustment and inspection process, caution is required and appropriate adjustments are made on a case by case basis.