How Air Blown Fiber System Can Contribute To Urban Expansion？

The pipe hole resources of underground communication pipelines are basic communication resources in short supply for operators. Except for newly built roads and roads in development zones, the occupancy rate of pipe holes on other roads is generally high. The "pipe hole occupancy" indicator is usually used to measure the usage of pipe hole resources in a certain pipeline segment. "Pipe hole occupancy rate" is the ratio of "the number of sub-holes occupied by optical cables" and "the number of sub-holes converted into tube groups". Generally, each sub-tube of a porous tube is counted as one sub-hole, and a large-diameter single-hole tube is calculated according to the number of sub-pores of a porous tube with a similar outer diameter. However, the traditional optical cable laying method has a very low utilization rate of pipe holes. Especially in urban areas with large business areas, the pipe holes have been basically occupied, and new businesses cannot develop.

Tangled Underground Fiber Optic Cable

Due to construction conditions, it is extremely difficult to expand the bore capacity of communication pipelines. With the shortage of pipeline resources, users have put forward higher requirements for the space utilization, construction efficiency and maintenance convenience of pipelines, which has also promoted the rapid development of cable blowing technology.

Fiber Cable Blowing Technology

The common structures of air blown micro cables are central tube type and layer-stranded type. The central tube type micro cable has good temperature characteristics, but the maximum number of cores is only 24 cores. The commonly used type is GYCFXTY.

Layer-stranded Type & Central Tube Type of Cables

The core number of the layer-stranded microcable can reach up to 576 cores, and its temperature characteristics are poor. When air blowing over long distances, a certain length needs to be reserved at the starting and ending points of each air blowing section to adapt to changes in cable length caused by temperature. The sheath of layer-stranded blown fiber optic cables is thin. If a filled structure is used, the grease may seep out and affect the air blowing effect after the air blown cablesare stored for a long time. Therefore, layer-stranded microcables are usually dry or semi-dry. Formula structure, type GCYFY.

DB Tube Bundle is a micro-optical cable with a smaller outer diameter and less sheath material than conventional optical cables. It is used to carry micro-cables. The micro duct is made of silicone plastic composite material. The outer wall of the Direct Buried Tube Bundle is generally made of high-density polyethylene (HDPE), the inner wall is a permanent solid lubricating layer (silicon core layer), and the inner wall can be equipped with a flow guide groove.

HDPE multi duct and air blowing fiber are usually used together. A mother tube is laid in a traditional pipeline (to protect the internal microtubes), and then the microtubes are blown into the mother tube, and then the microcables are laid in the blown fibre ducts. Since the outer diameter of microtube and microcables is significantly smaller, the number and number of cores of optical cables can be doubled in the same pipeline.

Cable Jetting Sloution Diagram for FTTH & FTTB

Air-blown microcable technology is a new technology of optical cable air blowing, which first blows microtubes into the laid master tube, and then blows different types of microcables into these microtubes according to the needs of customers at different times.

Compared with traditional direct-buried and pipeline laying methods, cable blowing can make full use of limited pipeline resources and achieve the advantage of "one pipe, multiple cables". For example, a 40/33 pipe can accommodate 4-5 10mm or 10 7mm blown fibre duct, so a 40/33 pipe can accommodate 576 core optical fibers, which increases the fiber laying density and improves Pipe utilization.

Advantages of Air-blown Fiber Technology

1) The initial investment is reduced. Operators can blow in micro-cables in batches and invest in installments according to market demand.

2) The cost of road excavation is reduced, the overall cost is reduced, the pipeline resource utilization rate is high, and the optical fiber density is high.

3) Flexible branching, you can modify and repair routes arbitrarily and flexibly. You only need to change the physical direction and connection method of microtubes to easily change the optical fiber network structure.

4) Optical cables are stored in microtubes for a long time and have strong resistance to external environmental interference.

5) Safe laying. Through the torsion resistance test and permeability test before laying, it is safer than the traditional traction laying method of optical cables. There is no need to worry about the optical cable being broken or pulled during the laying process.

6) It is convenient to upgrade lines in the future, increase the number of optical fiber cores or replace new types of optical fibers, and continuously adapt to market needs.

The Major Manufacturers of Air-Blown Micro Cable Market Worldwide

lHexatronic Group.

lNCM Solutions.

lMexichem.

lNestor Cables.

lDatwyler Cables.

lNexans Deutschland.

lHuiyuan Optical Communications.

lDraka Communications.

FCST - Better FTTx, Better Life.

We have been designing, manufacturing and supplying passive components for fiber optical networks since 2003. Everything we do in FCST is designed to provide efficient, simple and innovative solutions to solve complicated tasks.

We offer 4 solutions

lFTTH ODN Solution

lUnderground Cable Installation Solution

lAerial Cable Installation Solution

lFiber Tools & Test Solution

As a FTTx solution supplier, we can also do ODM according to project. We will continue to innovate and contribute more to the construction of the global optical fiber network.