According to local actual conditions, after the OPGW optical cable line has been put into operation for 3 years, the joint box should be selectively opened every year for inspection, and the moisture or water in the box should be observed. At the same time, the desiccant, sealing rubber ring, or silicone ring should be replaced, if a connector is found If the box is heavily damp or immersed in water, the inspection scope should be expanded.
As the OPGW line operation and maintenance of electric power communication do not have regular opening inspection items for the joint boxes, some joint boxes have been soaked very seriously, but they have not been found by the operation and maintenance personnel. The sealing ring of the joint box is exposed to the outside for a long time, and it will age quickly due to sun and rain, electric corrosion, insect bites, etc., and it is prone to cracks, which will make the box get damp, slowly accumulate water, and erode the fiber core of the optical cable. Therefore, the joint box should be opened and inspected regularly, and the aging seal ring should be replaced. The quality of the sealing material is the main reason for the failure of the sealing performance of the optical cable joint box. The sealing material is prone to softening at high temperatures, and the sealing material is easily brittle and loses elasticity at low temperatures.
Every year, the backup fiber should be used to test the attenuation of the optical fiber cable, and follow the attenuation curve of the connector box optical cable. When the attenuation curve of the connector box is found to be abnormal, timely arrange a maintenance plan and open the box for inspection. If possible, you can set up an optical fiber online monitoring system to monitor the attenuation of the connector box position on the entire OPGW cable line in real-time. Due to a large number of optical cable manufacturers and uneven quality, the quality management of the connector box needs to be controlled from the source. , Factory acceptance, engineering installation and construction, operation and maintenance at all levels.