Bellows Uses: unconstrained bellows compensate for axial pipe, large amount of compensation, with a strong self-steering and superior bending capability, which can simplify the design of the pipe guide bracket, the guide bracket spacing can be installed Any. Bellows Introduction: "unconstrained" is the country's conventional axial bellows have more constraints on the use of named and unconstrained bellows completely eliminated the previous axial compensator on the guide bracket L1≤ 4DgL2≤14Dg and L3 requirements unconstrained bellows can all stand pipe spacing can be arbitrary. 3 bellows Features: 1, unconstrained bellows mounting bracket spacing exactly the same determination and calculation of fixed bearing and the general thrust of axial compensator. In order to make the project reliable, unconstrained compensation in addition to the requirements close to the fixed bracket, but still requires that each mounting bracket features three guide bracket spacing. 2, unconstrained overhead compensation can be applied to the pipe, trench laying, can also be applied to have compensation Buried, without any constraint compensation should be located at manholes or darkroom. 3, unconstrained bellows compensate for axial pipe, large amount of compensation, with a strong self-steering and superior bending capability, which can simplify pipe guide bracket is designed so that the installation guide bracket spacing can be adjusted.