The development of the OPGW cable industry has gone through decades of ups and downs, and now it has achieved many world-renowned achievements. The emergence of OPGW Optical Ground Wire, which is very popular among customers, demonstrates another major breakthrough in technological innovation. In today's world, In the stage of rapid development, the issue of the life of OPGW cable has been mentioned again. How to extend the life of OPGW Optical Ground Wires should mainly pay attention to these technical points.
Three core technical points of OPGW Optical Ground Wire
1. OPGW cable coating material selection and drawing process
The reasons for the increased loss of functional OPGW cable mainly include hydrogen loss, OPGW cable cracking, and Optical Ground Wire stress. After practical testing, it was found that after many years of use, the OPGW Optical Ground Wire's mechanical properties, splicing properties, optical properties and other microscopic functions have not changed. After scanning The electron microscope found that the OPGW cable had no obvious micro-cracks or other abnormal phenomena. However, the coating situation of OPGW cable is not optimistic. The attenuation of Optical Ground Wires with high modulus, tight coating and strong peeling force increases significantly.
2. Ointment filling planning
Fiber paste is an oily substance of OPGW cables. It is a mixture based on mineral oil or synthetic oil. It blocks water vapor and buffers the Optical Ground Wire. The performance of the fiber paste is evaluated by testing the oxidation induction period of the ointment. After the ointment is oxidized, its acid value increases, which can lead to an increase in hydrogen evolution. After the ointment is oxidized, it has an impact on the stability of the Optical Ground Wire structure, resulting in a decrease in stress. In this way, the OPGW cable will suffer under the influence of vibration, impact, twists, changes in temperature differences, changes in terrain and geology, etc. The stress will weaken the buffering effect of the fiber paste on the OPGW cable, thereby reducing the safety of the OPGW Optical Ground Wire. The direct contact between the fiber paste and the OPGW cable is the most important direct cause of the deterioration of the function of the Optical Ground Wire. The fiber paste slowly deteriorates over time, usually first gathering into small particles, and then gradually evaporating, decomposing, and drying up.
3. Loose tube size
The influence of loose tube size on the service life of OPGW cable is more reflected in the comprehensive stress. When the size is too small, the stress on the OPGW cable cannot be relieved due to factors such as temperature changes, mechanical stress, and the interaction between the filler and the OPGW cable, which in turn accelerates the life span of the OPGW cable and causes aging.
The much-anticipated OPGW cable often fails due to external factors and some quality issues during actual use. If you want to extend its life, you need to grasp the main technical points. Although the discussion of the problem is more complicated, to extend the OPGW cable lifespan is not impossible.