1. Development background of microtube and microcable technology. After the emergence of new microtube and microcable technology, it has been favored by various telecom operators.
In the past, laying direct buried optical cables could only be repeated one trunk line after another. However, when pipelines appear, optical cables can be upgraded through pre-buried empty pipes.
Furthermore, the construction method of air-blown optical cables has been adopted in many trunk optical cable projects in my country. In the United States, Germany, France, the Netherlands, Denmark and other countries, the application of air-blown optical cable laying technology has become very popular. universal.
Needless to say, the benefits of this investment and construction idea and optical cable laying method, but the disadvantage of this construction method is that only one plastic pipe (usually 40/33mm in diameter) can be blown Optical cable, regardless of cable diameter, thickness and number of cores.
Microtube and microcable technology solves this problem.
2 Microtube and microcable technology and its products. The so-called microcable usually refers to a micro optical cable product containing 12 to 96 core optical fibers. The cable diameter is much smaller than that of ordinary optical cables. Currently, it is tended to be adopted in the market. Stainless steel tube, central beam tube structure.
The so-called micro-tube is to pre-lay HDPE or PVC plastic pipes, called mother pipes, and then blow the HDPE sub-tube bundles into the mother pipe with airflow, and then the micro-optical cables can be easily laid in batches.
During the construction of optical cables, the air blower sends the high-speed compressed air flow produced by the air compressor into the sub-tube together with the micro-optical cables.
3 The main advantages of micro-tube and micro-cable technology Compared with the traditional direct buried and pipeline laying methods, the main advantages of micro-tube and micro-cable laying technology are as follows: (1) Make full use of limited Pipeline resources to achieve "one pipe, multiple cables".
For example, a 40/33 pipe can accommodate 5 10mm or 10 7mm microtubes, and a 10mm microtube can accommodate a 60-core microcable, so a 40/33 The pipeline can accommodate 300 core optical fibers, which increases the fiber laying density and improves the utilization rate of the pipeline.
(2) Reduce initial investment.
Operators can blow in micro-cables in batches and invest in installments according to market demand.
(3) Microtube and microcable provide greater elastic expansion capabilities, which greatly meets the sudden demand for optical fiber in urban broadband services.
(4) Easy to construct.
The air blowing speed is fast and the one-time air blowing distance is long, which greatly shortens the construction period.
Because the steel pipe has a certain degree of rigidity and elasticity, it is easy to advance at the entrance of the pipe, and the length of one-time blowing can be up to 2km.superior.
(5) The optical cable is stored in microtubes for a long time and is not corroded by water and moisture, ensuring that the optical cable has a working life of more than 30 years.
(6) Facilitate the addition of new types of optical fibers in the future, stay ahead in technology, and continuously adapt to market needs.
4. Conclusion As telecommunications networks continue to develop, they also continue to put forward new requirements for optical cable products.
The structure of optical cables increasingly depends on the environment of use and the specific requirements of construction.
In the future, the focus of optical cable construction will continue with the construction of access networks and user premises networks, and there will also be a series of new changes in the new generation of optical cable structures and construction technologies.
Microtube and microcable technology will surely make a big difference in the construction of metropolitan area networks, access networks and other capacity expansion projects in the future.
