The double-helix armored double-sheathed optical cable is a high-strength, highly durable outdoor communication optical cable designed for extremely harsh environments. It achieves a perfect combination of multiple protective properties, including resistance to compression, tension, moisture, and rodents. It is an "industrial-grade" optical cable solution designed to meet the most severe physical and environmental challenges.
The double-spiral armored double-sheath optical cable achieves a perfect combination of multiple protective properties, including pressure resistance, tensile strength, moisture resistance, and rodent resistance, through its superimposed design of "double sheath" and "double armor." It is an "industrial-grade" optical cable solution designed to meet the harshest physical and environmental challenges. Although its cost and weight are higher than ordinary optical cables, it is the irreplaceable choice for applications requiring absolute reliability and durability.
Armored Fiber Optic Cables vs. Standard Fiber Optic Cables: Advantages Comparison
| Contrast dimension | armored optical cable | common optical cable | Summary of the advantages of armored optical cable |
| 1. Mechanical Protection | Additional armored layers, common types: • Steel strip armor: pressure-resistant and rodent-proof. • Steel wire armor: provides tensile and compressive strength, and lightning protection. • Aluminum strip armor: pressure-resistant, lightweight, and moisture-proof. • Stainless steel pipes: Exceptional pressure resistance and moisture-proof properties. | No metal armor layer, mainly relying on: • Plastic sheathing (e.g., PVC, LSZH, PE). • Non-metallic reinforcements (e.g., FRP, aramid yarn) provide tensile strength. | Provide a robust physical barrier that effectively resists penetration by sharp objects, crushing by heavy machinery, accidental construction damage, and gnawing by rodents (e.g., rats). |
| 2. Compression resistance | pole-strength The armor layer (particularly steel strips and wires) evenly distributes external pressure, significantly enhancing the optical cable's lateral pressure resistance and impact resistance. It can withstand soil pressure and construction compression in scenarios such as direct burial and conduit penetration. | relatively weakThe fiber is mainly dependent on the sheath and internal structure, which is easy to cause damage or breakage under direct extrusion or heavy pressure. | It has a much better survival ability than ordinary optical cable in direct burial, complex underground environment and multi-compression area (such as pipe well). |
| 3. Tensile Strength | Extremely strong (especially with steel wire armor).The armor layer (especially the steel wire) itself is a strong load-bearing element, which can withstand extremely high long-term tensile force and short-term traction force. | relatively average.The tensile strength is limited due to reliance on internal aramid yarns or glass fiber reinforced plastic (FRP). | Ideal for long-distance aerial and vertical deployment (e.g., shafts), submarine cables, and scenarios requiring large-span or high-tension laying. |
| 4. Environmental Protection | Complete and robust • Moisture/chemical resistance: The armor layer (especially the aluminum strip) forms a tight longitudinal water barrier. • Lightning and electrical protection: The steel wire armor also functions as a ground wire, providing electromagnetic shielding and lightning protection. • Rodent-proof: The metal layer effectively prevents rodents and other animals from gnawing. | Basic protection. • The sheath provides basic moisture protection and mild chemical resistance. • Lightning protection/strong current: Non-metallic structure with no electromagnetic shielding. • Almost no protection against animal bites. | Capable of operating in extreme environments including thunderstorm zones, areas with strong electromagnetic interference, humid or corrosive conditions, and regions with severe rodent infestations. |
Cable structure:
1. Outer Sheath
2. First Armor Layer - Spiral Steel Tape/Aluminum Tape
3. Inner Sheath
4. Second Armor Layer - Spiral Steel Tape/Steel Wire
5. Cable Core
Core Structural Features:
Double Spiral Armor: Provides superior mechanical protection.
Double Sheath: Provides excellent moisture resistance and resistance to environmental corrosion.
Application:
* Power System Communication: Directly laid on high-voltage transmission towers (an alternative to OPGW/ADSS) or within substations, its armor layer provides good electromagnetic shielding and lightning protection.
* Direct burial in harsh environments: Crossing highways, railways, mining areas, swamps, etc.
* River and seabed crossings: As underwater optical cables in shallow seas or rivers, extremely high tensile and compressive strength is required.
* Forests and wild areas: Effectively preventing animal gnawing.
* Industrial areas: Such as mines, oil fields, ports, etc., areas requiring resistance to mechanical damage and chemical corrosion.
* Long-distance overhead laying: Requiring the cable to withstand its own weight as well as wind and ice loads.
Other Armored fiber optic cable
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