Novel optical fiber wiredrawing cooling system

Abstract

The invention discloses a novel optical fiber wiredrawing cooling system which is used for reducing the temperature before optical fiber coating and avoiding bubble mixing with the coating, ensuring stable coating status of the optical fiber and reducing use quantity of helium gas. The optical fiber wiredrawing cooling system is suitable for high-speed wiredrawing and includes: a cooling tube upper quick-passing gate, a cooling tube lower quick-passing gate, a helium flow guide device, a cooling tube body, a cyclic water cooling device, a coating wire diameter control system, a cooling water tube and a gas tube. The cooling tube body has an inner chamber which is suitable for an optical fiber to pass therethrough; and helium gas is blown into the cooling tube through the special helium gas feeding device which is communicated with the inner chamber and is mounted between the two sections of the cooling tube. A plurality of cooling tube sections are connected through a gas inlet connection apparatus. An outer wall of each cooling tube section is wrapped by a polystyrene foam heat insulation layer. The helium flow guide device draws the gas in the tube at a proper guide flow rate to achieve a best cooling effect. The system is convenient to clean, is good in cooling effect, is high in optical coating quality, is stable in coating layer diameter and is less in helium gas use quantity.

Description

technical field [0001] The invention relates to the field of optical fiber drawing production and manufacturing, and is used for cooling the optical fiber during high-speed drawing production, so that the optical fiber enters the coating system at a suitable temperature to ensure the coating quality of the optical fiber. Background technique [0002] During high-speed wire drawing production, the temperature of the optical fiber when it comes out of the furnace is about 2000 degrees. Directly entering the coating at such a high temperature will cause abnormal coating and production interruption. For this purpose, the optical fiber is forced to be cooled by means of cooling pipes. Chinese patent CN1450009A describes an optical fiber cooling pipe proposed by the applicant Alcatel, which consists of an inner chamber, a set of suction pipes and air intake pipes. The cooling effect is improved by air injection and air extraction, but the processing is difficult and it is inconve...

AI Technical Summary

Problems solved by technology

The cooling effect is improved by air injection and air extraction, but the processing is difficult and it is inconvenient to clean during production

Using ordinary cooling pipes, the amount of helium is large, and the cooling is uneven. High-speed wire drawing is prone to large fluctuations in coating diameter, and the pores of ordinary tubular cooling pipes are inconvenient to clean, and the cooling cavity not only absorbs internal heat but also absorbs heat from the surrounding environment. heat, thus affecting cooling effect and fiber strength

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