gui chao cable news: cable construction notes (2017-02-17)
from：guichao author：admin click： 216 addtime：2017-02-28 12:38:47
1 cleaning and testing
before laying the optical cable, the pipe hole should be cleaned and tested. when cleaning the use of autocratic cleaning tools, cleaning after the application of the test stick for the test. the inner diameter of the plastic pipe shall be 1.5 times of the outside diameter of the optical cable. when in a cement pipe hole zhongbu put two or more of the pipe when the pipe diameter should be less than the total equivalent pore diameter 85%.
2 plastic discharge tube
when the utility model is characterized in that the two ends of the plastic tube are provided with more than two plastic tubes, the end of the tube can not be marked. if the tubes are of the same color or no color, the end of the pipe shall be marked separately. the length of the plastic pipe should not exceed 300m, and the plastic pipe shall not be connected in the middle of the pipe. in addition, in the plastic sub pipe cloth operation, the ambient temperature should be -5 degrees celsius to 35 degrees celsius, in order to ensure its quality is not affected. the plastic sub pipe to be put in place should be fixed together with the cement pipe in time to prevent the tube from sliding. in addition, also the sub nozzle temporary plugging, to prevent foreign objects into the tube. the plastic pipe shall be provided with sufficient length in the hole according to the design requirements.
3 cable traction
the length of optical fiber cable should be less than 1000m. when the distance is more than the distance, it is necessary to adopt the method of subsection traction or auxiliary traction in the middle position, so as to reduce the tension of the optical cable and improve the construction efficiency. in order to protect the cable traction in the process is not damaged, in the cable penetration hole, pipe bend or other obstacles and cross, should adopt the guiding device or bell protection tube and other protective measures. in addition, it can also be used on the external cable, such as neutral lubricant and other materials, in order to reduce the friction resistance of fiber optic cable traction.
4 allowance
cable laying, should one by one into the hole or holes in the hand will be placed in the specified cable tray, and should have adequate allowance, in order to prevent the cable is too tight. when the optical cable in the hole or the hand hole needs to be connected, the reserved length shall be in accordance with the minimum value of the relevant regulations.
5 joint treatment
the cable shall not be connected in the pipe hole in the middle of the pipe. when the cable has no joint in manholes, requirements of cable bending banding in cable tray placed fixed, not directly through the manhole in middle, otherwise not only affects the construction and maintenance, and easy to cause damage to the cable. when a cable connector, the serpentine hose or soft plastic pipe and other pipe protection, and put on the pallet bound to be fixed.
6 plugging and marking
the outlet of the pipe hole of the optical fiber cable should be tightly sealed to prevent moisture or sundries from entering the pipe. the optical cable and its connection shall have the identification mark, and indicate the number, type and specification of the optical cable. in the cold area should also take measures to prevent freezing, cold injury of cable. such as optical cable may be damaged, can be placed on or around the insulation plate for partition protection.