Quartz casing inner hole purging end cap and purging method

Abstract

The invention discloses a purging end cap for the inner bore of a quartz sleeve. The purging end cap comprises end caps respectively arranged at two ends of a to-be-jointed quartz sleeve section to seal the two ends of the to-be-jointed quartz sleeve section, wherein the end caps contact with the excircle surface of the to-be-jointed quartz sleeve section and do not contact with the inner bore of the quartz sleeve, and the end caps are provided with short tubes used for inputting gas into the inner bore of the quartz sleeve. The invention also discloses a method for purging of the inner bore of the quartz sleeve via the purging end cap. The purging end cap and purging method provided by the invention can reduce leakage of inert process gas during butt joint of quartz sleeves, guarantee the fluidity of the inert process gas at a low pressure and prevent the inner bore of the quartz sleeve from contacting with tool parts during butt joint.

Description

technical field [0001] The invention belongs to the field of optical fiber prefabricated rod manufacturing, and in particular relates to a purging end cover of the inner hole of a quartz sleeve and a purging method. Background technique [0002] In the optical fiber manufacturing industry, it is often necessary to carry out high-temperature sintering butt joint extension of the quartz sleeve. During the butt jointing process of the quartz sleeve, an inert process gas (such as nitrogen, argon or helium) must be continuously circulated through the inner hole of the quartz sleeve to discharge impurities in the inner hole of the quartz sleeve. Since the inert process gas has a lower pressure and is more expensive, it is necessary to ensure the fluidity of the inert process gas at a lower pressure and reduce the leakage loss of the inert process gas when it is delivered to the inner hole of the quartz sleeve. Moreover, during the docking process of the quartz sleeve, it is neces...

AI Technical Summary

Problems solved by technology

Moreover, during the docking process of the quartz sleeve, it is necessary to avoid contact between the inner hole of the quartz sleeve and the tooling parts, so as not to increase the attenuation of the finished optical fiber and affect the quality of the optical fiber

However, the existing technology and devices cannot guarantee the fluidity of the inert process gas at a lower pressure and the inner hole of the quartz sleeve is not in contact with the tooling parts, which affects the butt joint of the quartz sleeve and the quality of the finished optical fiber.

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