Outdoor optical cable, simply said to be used outdoors, belongs to a kind of optical cable. It is called outdoor optical cable because it is most suitable for outdoor use. It is durable, can withstand wind, sun, cold and freezing, and has a thick outer packaging. It has some mechanical and environmental characteristics such as pressure resistance, corrosion resistance and tensile resistance.
Commonly used outdoor optical cables are divided into two structures: central tube type and stranded type optical cable.
① Central tube type optical cable: The center of the optical cable is a loose tube, and the strengthening member is located around the loose tube. For example, the common GYXTW type optical cable has a small number of cores, usually less than 12 cores.
GYXTW optical cable:
Bundle tube: The material of the bundle tube is PBT, which is hard and flexible and resistant to lateral pressure.
Because there are only 12 colors of optical fiber, the national standard (also international standard) central beam tube type optical cable can only achieve 12 cores at most. Optical cables with more than 12 cores are generally stranded.
② Stranded optical cable: multiple bundle tubes with optical fibers are twisted on the core strength member by twisting. Such optical cables, such as GYTS, GYTA, etc., can be combined with loose tubes to obtain larger cores. Number of fiber optic cables.
Fiber optic cables with 60 cores and below often use a 5-tube structure. For example, a 60-core fiber optic cable uses 5 bundle tubes, and each bundle tube contains 12 optical fibers. Generally, stranded optical cables with 12 cores and below are twisted together with a bundle tube containing 12 cores of optical fiber and 4 solid filler ropes. It can also be twisted with 2 6-core bundle tubes and 3 filling ropes, or it can be matched in other ways.
GYTS optical cable: Among the stranded optical cables, this type and GYTA are the most common. Twist several bundle tubes on a thicker phosphating steel wire, fill the gaps of the stranded cables with water-blocking cable paste, and squeeze the sheath on the outer wrap after a circle of plastic steel tape.
GYTA optical cable: The structure of this optical cable is the same as GYTS, except that the steel strip is replaced with aluminum strip. The side pressure index of aluminum tape is not as high as that of steel tape, but aluminum tape has better anti-rust and moisture-proof performance than steel tape. In some pipe-through environments, using GYTA model, the optical cable has a longer service life.
GYFTY type optical cable: This type of optical cable is twisted several bundle tubes on a non-metallic reinforced core, the twisted gap is filled with cable paste or a circle of water blocking tape is protected, and the sheath is directly squeezed on the outside without armor. This model has many evolutions. It is used in some overhead environments. In order to increase the tensile force of the optical cable, some aramid fiber and extruded sheath are added outside the stranded cable core. If the central reinforcement does not use non-metallic reinforced core (FRP) but steel wire, the model is GYTY, F (representing non-metallic).
Type 53 fiber optic cable: We see some models such as GYTA53, GYTY53, this model is to add a layer of steel armor and sheath outside the GYTA, GYTY fiber optic cable. Used in those places where the environment is relatively harsh. When you see 53, you should know that it is an extra layer of armor and an extra layer of sheath.
Post time: Jan-25-2022