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首页> 外文会议>55th IWCS/Focus~TM Conference >Enhanced Buffering Process for Totally Dry Cable
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Enhanced Buffering Process for Totally Dry Cable

机译：全干电缆的增强缓冲工艺

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This presentation shows how to manufacture entirely dry subunits for stranded loose tube cables. The prevention of the water penetration is based on water blocking yarn technology. The traditional way of preventing the water penetration is to fill the tubes with filling compound. The messy filling compound is replaced with water blocking yarns therefore dry loose tube cables can reduce fiber installation costs in two ways. It simplifies the splice preparation and cleanup of the fibers.rnIn order to utilize benefits from dry cable designs one must solve the excess fiber length (EFL) control dilemma at today's production speeds. The main challenge when manufacturing totally dry cables is the EFL control. When the tubes are manufactured with traditional buffering process the gel inside the tube will acts as a lubricant. Therefore the coupling point will be at the middle capstan which will lead to stabile EFL control. The EFL can be extremely high when producing totally dry loose tubes. The fibers will touch the inner wall of the tube because the filling compound is replaced with non-gliding yarns. This coupling will take place immediately after the cross head and the thermal shrinkage of the tube will cause the EFL increase. The clinching method, where the tube is compressed while it is cooled down, can compensate the EFL increase and guarantee EFL levels suitable for high quality stranded dry loose tube cables. The clinching concept will solve the EFL control problems only if the gliding between the tube, aramid yarns and fibers is solved. Today's target is to minimize the tube dimensions and wall thicknesses. Therefore the surface friction between the fibers and the tube must be minimized. The new manufacturing concept will be presented. It is possible to achieve optimized balance between the maximum fiber content and the minimum tube dimensions with the chemical surface treatment of the inner tube wall combined with clinching technology.
机译：此演示文稿展示了如何制造用于绞合的松套管电缆的完全干燥的子单元。防渗水是基于阻水纱技术。防止水渗透的传统方法是用填充化合物填充管道。杂乱的填充料被阻水纱代替，因此，干的松套管电缆可以通过两种方式降低光纤安装成本。为了简化光纤的熔接准备和清理工作。为了利用干式电缆设计的好处，必须以当今的生产速度解决多余的光纤长度（EFL）控制难题。制造全干电缆时的主要挑战是EFL控制。当使用传统的缓冲工艺制造试管时，试管内部的凝胶将充当润滑剂。因此，耦合点将位于中间绞盘，这将导致稳定的EFL控制。当生产完全干燥的散管时，EFL可能会很高。纤维会接触到管子的内壁，因为填充化合物已被非滑行纱线代替。这种连接将在十字头之后立即发生，并且管子的热收缩将导致EFL增大。紧缩方法是在冷却时压缩管子，这种方法可以补偿EFL的增加，并确保EFL等级适用于高质量的绞合干散管电缆。只有解决了管子，芳族聚酰胺纱线和纤维之间的滑动问题，压紧概念才能解决EFL控制问题。今天的目标是使管子尺寸和壁厚最小。因此，必须使纤维与管之间的表面摩擦最小。将介绍新的制造概念。内管壁的化学表面处理与压接技术相结合，可以在最大纤维含量和最小管尺寸之间实现最佳平衡。

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