A cleaning method for quartz central tube in an optical fiber ultraviolet curing furnace

Abstract

The invention relates to the technical field of optical fiber manufacturing, in particular to a device and a method for cleaning a quartz central tube in an optical fiber ultraviolet curing furnace. The device comprises a clamping rotary device used for fixing a to-be-cleaned quartz central tube and a movable oxyhydrogen flame generating device for heating the to-be-heated quartz central tube, wherein the clamping rotary device is provided with an air sucking device; a temperature sensing device is arranged on the to-be-cleaned quartz tube and is connected with a control device by virtue of a signal wire; the clamping rotary device, the oxyhydrogen flame generating device and the air sucking device are connected with the control device by virtue of signal wires. An oxyhydrogen flame lamp is adopted for heating and baking the quartz central tube and a mode of sucking out exhaust gas such as carbon dioxide after UV rubber combustion by use of the air sucking device is used for overcoming the defects of the cleaning method, so that the cleaning effect is relatively thorough, the inner wall of the quartz central tube can not be damaged, the light transmittance and cyclic utilization times of the quartz central tube are effectively improved, and furthermore the optical fiber coating and curing quality is ensured.

Description

technical field [0001] The invention relates to the technical field of optical fiber manufacturing, in particular to a cleaning device for a quartz central tube in an optical fiber ultraviolet curing furnace and a cleaning method thereof. Background technique [0002] In the optical fiber manufacturing process, the coating volatiles will be generated during the curing process of the coated optical fiber, which will adhere to the inner wall of the quartz center tube in the UV curing furnace. After a period of time, the quartz center tube needs to be cleaned, otherwise the quartz center tube will be reduced. 360nm ultraviolet light transmittance, which affects the quality of fiber curing. [0003] At present, there are two main methods for cleaning the quartz center tube: one is to soak the solvent in the water bath for a long time, and then clean it with a brush. However, this method is easy to damage the quartz center tube during the cleaning process with a brush, and canno...

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Problems solved by technology

However, this method is easy to damage the quartz center tube during the cleaning process with a brush, and cannot thoroughly clean the volatiles, and will produce many scratches on the surface of the quartz center tube, which will reduce the transmittance and cycle life of the quartz center tube

Another method is to soak with chemical reagents. Although this method can better clean the UV glue volatiles adhering to the quartz central tube, the chemical reagents will corrode the surface of the quartz central tube and produce many small microcracks. Will reduce the light transmittance and cycle life of the quartz center tube

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