We often talk about the concept of fiber optic cable, but in fact, many friends do not know much about the detailed knowledge of fiber optic cable. For example, what is the pipe fiber optic cable and direct buried cable, or what is the difference between pipe fiber optic cable and direct buried cable? The following ZMS cable editorial takes you to understand.
Pipeline cable is used in the access network or user premises network from the outdoor fiber optic cable, which is a communication cable laying method.
Pipe laying is generally in urban areas, pipe laying environment is better, so there are no special requirements for cable sheathing, and no need for armor.
Pipe laying must be selected before laying the length of the section and the location of the connection point.
Laying can be used for mechanical side traction or manual traction.
The traction force of one traction should not exceed the allowable tension of the fiber optic cable.
The material for making the pipe can be concrete, asbestos cement, steel pipe, plastic pipe, and so on according to geography.
Directly buried fiber optic cable is a kind of communication cable laying method.
This kind of fiber optic cable is armored with a steel belt or steel wire outside and buried directly in the ground, which is required to have the performance of resisting external mechanical damage and preventing the performance of soil corrosion.
Pipeline fiber optic cable laying should make the following preparations:
1) According to the design of the fiber optic cable occupied by the position of the pipe hole.
2) In the same route the choice of the hole should not change, such as changes or bends, and should meet the requirements of the cable bending radius.
3) Each manhole should be manned when manually placing the fiber optic cable; the manhole should be manned when mechanically placing the fiber optic cable around the bend.
(4) When the fiber optic cable penetrates the pipe hole or pipe bends or crosses, it should be protected by a guide device or a flared protection pipe, and the outer protective layer of the fiber optic cable shall not be damaged.
(5) Neutral lubricant can be applied around the fiber optic cable as needed.
(6) The length of the fiber optic cable traction is generally not greater than 1000 meters. When the length is longer, it should take 8 segmented traction or the middle with auxiliary traction.
(7) Cable deployment, should be directed by a person unified, manhole by manhole will be placed in the provisions of the fiber optic cable on the pallet and should leave an appropriate margin to avoid the fiber optic cable being too tight.
(8) Joints where the manhole cable length should be reserved under the provisions of the table; design requirements for special reserve cable taut.
Pipeline cable protection measures should meet the following requirements:
1) Manhole in the fiber optic cable can be serpentine hose (or soft plastic tube) protected and tied in the cable tray or according to the design requirements of the measures to deal with.
2) The pipe opening should take plugging measures.
3) The fiber optic cable in the manhole should have an identification mark.
4) Cold areas should take anti-freezing measures according to the design requirements to prevent damage to the fiber optic cable.
The plastic sub-pipe deployment method is the same as the fiber optic cable deployment, and should also meet the following requirements:
1) When placing more than two sub-pipes without color marking, the marking should be done at the end.
2) The ambient temperature of the plastic sub-pipe should be between -5oC and +35oC.
3) The length of the continuously laid plastic sub-pipe should not exceed 300 meters.
4) The maximum pulling force of the sub-pipe should not exceed the tensile strength of the pipe, and the pulling speed should be uniform.
5) The remaining length of the sub-pipe in the manhole should meet the design requirements.
6) The pipe holes for wearing and placing plastic sub-pipes should be installed with plastic pipe plugs (other methods can also be used) to fix the sub-pipes.
7) The sub-pipe shall not have joints in the middle of the pipe.
8) Sub-pipe deployment is completed, the pipe opening should be made temporary plugging; this project does not use the sub-pipe must be installed at the end of the pipe plug (cap).
Directly buried fiber optic cable and other buildings and underground pipeline distance should meet the specified requirements.
The same ditch laying of fiber optic cables, shall not cross, or overlap, it is appropriate to use separate traction at the same time as the deployment of the way.
Direct burial fiber optic cable laying should meet the following requirements:
1) The depth of the fiber optic cable ditch should be under the provisions of the bottom of the ditch should be flat without gravel; the stony, semi-stony ditch bottom should be paved with 10 cm thick fine soil or sand.
2) When mechanically pulling, a ground pulley should be used.
3) When manually lifting and placing, the fiber optic cable should not appear less than the specified radius of curvature of the bend, as well as dragging the ground, hauling too tight, and other phenomena.
4) The fiber optic cable must be placed in the bottom of the trench, and shall not be vacated and arched.
5 Cable laying in the slope is greater than 20 °, the slope is greater than 30 meters on the slope, it is appropriate to use the "S" shape laying or according to the design requirements of the measures to deal with.
6) Deployment process or after deployment, should be a timely inspection of the cable sheath, if damaged should be repaired immediately; directly buried cable should be checked after laying the cable sheath to ground insulation resistance.
7) Fiber optic cable and copper conductors must be checked to confirm compliance with quality acceptance standards, before the whole ditch is back to the soil.
Optical cable trench backfill should meet the following requirements:
1) First backfill 15 cm thick crushed soil or fine soil, it is strictly prohibited to push stones, bricks, frozen soil, etc. into the ditch, and should be artificially stepped on.
2) The backfill should be 10 centimeters above the ground.
Above is what are the pipeline cable and direct burial cable and pipeline cable and direct burial cable difference between what all the content, I believe that after reading this article for the pipeline cable and direct burial cable have a certain understanding, I hope to give you help.
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