First, when the outer diameter of the wire is determined, according to the principle that the filling rate of the bellows is ≤85%, select the corresponding specification of the bellows. The outer diameter of the wire determined in the above table is taken as an example. It is 22.59-23.3, so the diameter of the bellows is preferably φ23.
Second, according to the actual installation position, when the cable needs to pass through the hole or install the slot during loading, try to avoid the outer diameter of the bellows that interferes with the installation slot or is too small to play a fixed role; When multiple corrugated pipes are in parallel, the pipe diameter should be filled as full as possible, so as to avoid unfastened tightening due to too small outer diameter, causing relative vibration and aggravating the wear of corrugated pipes, resulting in the risk of leakage of worn wires.