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Industry information

Precautions for optical cable construction

Time:2020-07-17 Views:1287
1. Clean and try
        Before laying the optical cable (inquiry about the cable price), the pipe holes should be cleaned section by section and tried to pass. When cleaning, use a special cleaning tool, and use a test stick to check the test after cleaning. The inner diameter of the plastic sub-tube should be 1.5 times the outer diameter of the optical cable. When more than two sub-tubes are placed in a cement pipe hole, the equivalent total outer diameter of the sub-pipe should be less than 85% of the inner diameter of the pipe hole.
        2. Lay out plastic sub-tubes
        When putting more than two plastic sub-tubes, if the tubes are of different colors, the end may not be marked. If the color of the pipe is the same or no color, the ends should be marked separately. The length of the plastic sub-pipe should not exceed 300m, and it is required that the plastic sub-pipe should not have a joint in the middle of the pipe. In addition, when laying the plastic sub-tubes, the ambient temperature should be between -5 degrees Celsius and +35 degrees Celsius to ensure that its quality is not affected. The finished plastic sub-tube should be fixed with the cement pipe in time to prevent the sub-tube from sliding. In addition, the sub-pipe opening should be temporarily blocked to prevent foreign matter from entering the pipe. Plastic sub-tubes should have sufficient length in the entry hole according to the design requirements.
        3. Optical cable traction
        The length of the primary traction of the optical cable should be less than 1000m. When the distance is exceeded, it should adopt section traction or add auxiliary traction in the middle position to reduce the cable tension and improve the construction efficiency. In order to protect the outside of the optical cable from damage during traction, when the optical cable penetrates into the tube hole, the bend of the pipeline, or crosses with other obstacles, protective measures such as guide devices or trumpet protection tubes should be used. In addition, materials such as neutral lubricant can be applied to the outside of the optical cable (check cable price) as needed to reduce the frictional resistance of the optical cable when it is pulled.
        4. Reserve margin
        After the optical cable is laid, the optical cable should be placed on the specified pallet in the hole or hand hole one by one, and an appropriate margin should be left to prevent the optical cable from being too tight. When the optical cable in the hole or hand hole needs to be connected, the reserved length should meet the minimum value of the relevant regulations.
        5. Joint processing
        The optical cable must not have a joint in the pipe hole in the middle of the pipe. When the optical cable does not have a connector in the manhole, the optical cable is required to be bent and placed on the optical fiber pallet for fixed binding, and it is not allowed to pass directly in the middle of the manhole, otherwise it will affect the construction and maintenance, and easily lead to damage to the optical cable. When the optical cable has a connector, it should be protected with a serpentine hose or soft plastic tube and other materials, and placed on the pallet to be fixed and bound.
        6. Blocking and marking
        The outlet end of the pipe hole where the optical cable is placed should be tightly sealed to prevent moisture or debris from entering the pipe. Both the optical cable and its connection shall have an identification mark, and shall indicate the number, model and specifications of the optical cable, etc. Anti-freezing measures should also be taken in severely cold areas to prevent the optical cable from being damaged by freezing. If the optical cable (inquiry the cable price) may be damaged due to impact, an insulating plate can be installed on or around it for protection.