The Fiber Optic Splice Closure is a connecting part that connects two or more optical cables together and has protective components. It is a must-have in the construction of optical cable lines, and is one of the most important equipments. The quality of the fiber optic splice closure directly affects the optical cable. The quality of the line and the service life of the cable line.
In the process of installing and fixing the fiber optic splice closure, there will be a retraction phenomenon, so what is called retraction? Why is this happening?
In the installation of the fiber optic splice closure, there is a fixing device for fixing the cable sheath and fixing the optical cable reinforcing member. The fixing member is mainly considered for fixing the reinforcing member, and neglecting the fixing of the sheath, especially after being affected by temperature change. The reliability of the sheath fixing, which is what we often call the "retraction" phenomenon of the fiber optic splice closure, is reflected in the type test of the fiber optic splice closure.
After the joint box and the optical cable are sealed and sealed in the experiment of the fiber optic splice closure, the air pressure fiber optic splice closure is filled with a gas pressure of 60 KPa, and then a tensile force of not less than 1000 N is applied in the axial direction of the optical cable for one minute, and the air pressure after the test should be No change is qualified. However, some fiber optic splice closures are difficult to pass this test. The main reaction is that the design of the sheath fixing device is unreasonable, the sheath fixing is unreliable, and the sliding looseness and air leakage are generated under the action of the pulling force.
The best way to do this "retraction" phenomenon is to make the device reasonable and robust. Guaranteed that these two points of retreat will not appear.