Sealing device and sealing method for optical fiber preform tail handle

Abstract

The invention provides a sealing device for an optical fiber perform tail handle, which comprises a quartz tail tube fixed on a rod hanging platform. A tail handle part of the preform is fixed at thelower end of the quartz tail tube, and a quartz assembly for realizing sealing sleeves a reducing area of the tail handle of the preform. According to the optical fiber preform tail handle sealing device provided by the invention, the preform pretreatment process is effectively reduced, the original tail handle does not need to be cut off and then subjected to rod hanging and wire drawing on a tail tube, and the production cost is reduced. And meanwhile, through reasonable structural design, the production hidden danger caused by a large reducing area at the tail part of the preform is avoided.

Description

technical field [0001] The invention belongs to the technical field of optical fiber production and manufacturing, and in particular relates to a sealing device and a sealing method for an optical fiber preform tail handle. Background technique [0002] The optical fiber is drawn from a preform rod heated at high temperature. When the preform rod leaves the factory, the original shank is generally retained. Considering that the length of the original shank variable diameter area is different, when the preform tail rod enters the drawing furnace, it cannot achieve a perfect seal. Affecting the stability of the airflow in the drawing furnace and the loss of graphite parts in the drawing furnace, some optical fiber manufacturers will cut off the original tail handle and its variable diameter area, and then weld a quartz tail tube at the end of the optical fiber preform, and then use ordinary quartz The piece reaches the seal of the drawing furnace. However, the process of adop...

AI Technical Summary

Problems solved by technology

[0002] The optical fiber is drawn from a preform rod heated at high temperature. When the preform rod leaves the factory, the original shank is generally retained. Considering that the length of the original shank variable diameter area is different, when the preform tail rod enters the drawing furnace, it cannot achieve a perfect seal. Affecting the stability of the airflow in the drawing furnace and the loss of graphite parts in the drawing furnace, some optical fiber manufacturers will cut off the original tail handle and its variable diameter area, and then weld a quartz tail tube at the end of the optical fiber preform, and then use ordinary quartz Pieces reach the seal of the drawing furnace

However, the process of using such a butt joint tailpipe is relatively complicated, and the production cost is high

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