论文部分内容阅读
最近,日本电气通信研究所开发了一种使用吸水材料的防水光缆。这种新型光缆的特点是不需要充气,也不需要用胶状防水剂充填光缆,便能达到防水的目的。由于不需要加压充气,光缆可以免除传统的用以抗张力的金属外护套。这样,新型光缆在高压电力线或电气化铁道附近区域使用时,就不会受到强电的干扰和影响,改变了传统光缆在上述地区使用时往往受到限制的现象。另外,新型光缆还具有直径细、重量轻、施工和维护便利等优点。新开发的光缆使用一种由丙烯酸纤维组成的吸水材料。制造光缆时,把这种吸水材料加工成带状物均匀地缠绕在光缆芯线外部。这种吸水材料可以吸收比自身重量重数百倍乃至上千倍的水分。当水分浸入光缆时,该吸水材料边吸水边膨胀,同时使吸水材料凝胶化形成一层防水膜,可以阻止水分继续浸入。当水分吸干后,吸水材料干干净净,对以后的光缆接续作业毫无影响。
Recently, the Japan Electric Telecommunications Research Institute has developed a water-resistant optical fiber waterproof cable. This new type of optical cable is characterized by no need to inflate, do not need to use gel-like waterproofing agent filling cable, can achieve the purpose of waterproofing. With no need for pressurized inflation, the cable eliminates the traditional metal outer sheath used for tensile strength. In this way, the new type of optical cable used in the vicinity of high-voltage power lines or electrified railways will not be affected by strong electric power and will change the phenomenon that traditional optical cables are often restricted in the above-mentioned areas. In addition, the new fiber optic cable also has the advantages of small diameter, light weight, construction and maintenance convenience. The newly developed optical fiber cable uses a water-absorbing material composed of acrylic fibers. In the manufacture of optical cables, the water-absorbent material is processed into ribbons that are uniformly wound around the outside of the cable core. This absorbent material can absorb hundreds of times or even thousands of times its own weight of water. When moisture is infused into the optical fiber cable, the water-absorbing material expands while absorbing water, and at the same time, the water-absorbing material is gelled to form a waterproof membrane, which can prevent the water from continuously immersing. When the moisture is dry, the water-absorbent material is clean and has no effect on the subsequent optical cable connection.