Steel wire armored underwater optical cables represent the pinnacle of communication engineering, embodying the highest integration of materials science, mechanical design, and communication technology. Through layers of wound steel wires, they provide unparalleled tensile strength and comprehensive mechanical protection, overcoming the extreme challenges of underwater environments such as tension, pressure, and mechanical shock. They are suitable for vertical deployment, underwater, or long-distance overhead applications.
Steel wire armor consists of one or two layers of high-strength galvanized steel wire spirally wound inside the cable sheath and outside the cable core. This wire mesh provides the cable with extremely high tensile strength and additional protection against compression and impact.
Cable Structure:
* Center Reinforcement: Provides basic tensile support.
* Fiber Optic/Fiber Bundle Tube: The fiber optic cable is placed inside a loose tube filled with grease, providing cushioning and waterproofing.
* Cable Core: The fiber bundle tube is twisted around the center reinforcement.
* Inner Sheath: An extruded polyethylene sheath forms a flat, circular surface for even winding of the steel wire.
* Armor Layer: This is the core of its strength. One or two layers of fine steel wire are tightly spirally wound around the inner sheath at a specific pitch, forming a circular, flexible, tubular metal protective layer.
* Outer Sheath: The outermost layer is a black high-density polyethylene sheath, providing abrasion resistance, corrosion resistance, and UV protection.
Application:
* Vertical Shaft Laying: When vertically laid in high-rise buildings or communication towers, the optical cable needs to withstand its own immense weight; steel wire armor is essential.
* Long-Distance Aerial Laying: Used for overhead lines, capable of withstanding wind loads, ice loads, and long-term tensile stress from its own weight.
* Underwater Laying: Crossing rivers, lakes, or oceans, requiring the cable to withstand the impact and drag forces of water currents.
* Mines and Tunnels: Harsh environments with potential risks of falling rocks, crushing, and dragging.
* Applications Requiring Frequent Dragging: Such as mobile communication equipment and field optical cables.
Features:
Unparalleled Tensile Strength:
The steel wire armor allows it to withstand the immense tensile forces of its own weight over lengths of several kilometers, as well as the pulling forces of marine tractors during deployment and retrieval.
Extremely Strong Compressive Strength:
The dual-metal structure of "steel tube fiber unit + steel wire armor" forms a robust barrier against the high pressure of the deep sea.
Excellent Resistance to Mechanical Shock:
Effectively resists snagging and impacts from fishing trawls, anchors, and friction from seabed rocks. In shallow waters, even a double layer of steel wire armor is used for additional protection.
Perfect Water-Blocking and Moisture-Proof Design:
Utilizing metal (steel pipe) sealing and multiple water-blocking materials, the optical cable is guaranteed to remain moisture-free for decades, ensuring stable optical transmission performance.
Long Lifespan and High Reliability:
From materials to processes, everything is designed for "zero failures," ensuring long-term stable operation in harsh, unattended environments.
Other Armored Fiber Optic Cable
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