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1. (WO2017036032) NOVEL COOLING SYSTEM FOR OPTICAL FIBER DRAWING

Pub. No.:    WO/2017/036032    International Application No.:    PCT/CN2015/099437
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Wed Dec 30 00:59:59 CET 2015
IPC: C03B 37/02
Applicants: ZHONGTIAN TECHNOLOGY FIBRE OPTICS CO., LTD
中天科技光纤有限公司
Inventors: SUN, Zhicheng
孙志成
LIU, Zhizhong
刘志忠
CAO, Shanshan
曹珊珊
WHANG, Zhen
王震
ZHANG, Haitao
张海涛
Title: NOVEL COOLING SYSTEM FOR OPTICAL FIBER DRAWING
Abstract:
A cooling system for optical fiber drawing is used for decreasing the temperature of an optical fiber before coating, avoiding the occurrence of bubbles in a coating, ensuring a stable coating state of the optical fiber, and reducing the amount of helium gas used, being suitable for high-speed drawing. The cooling system consists of cooling pipe upper and lower shutters, a helium gas guiding device, a cooling pipe body, a cooling water circulating and cooling device, a coated fiber diameter control system, a cooling water pipe and a gas pipe. The cooling pipe body comprises an inner cavity suitable for the optical fiber to pass through; helium gas is blown into the cooling pipe by means of a special helium gas intake device which communicates with the inner cavity and is mounted between two cooling pipes, several single-segment cooling pipes being connected by means of gas intake connection devices; the outer wall of each cooling pipe segment is covered with a polystyrene foam thermal insulating layer, and the helium gas guiding device guides the gas within the pipe at a suitable guiding flow rate to achieve the optimal cooling effect.