Glass base material manufacturing device

Abstract

Provided is a glass base material manufacturing device capable of suppressing variation in the outer diameter of a glass base material in the longitudinal direction. The device is provided with: a plurality of glass synthesis burners (22) which are arranged side by side in the vertical direction inside a reaction vessel (2) and which generate glass particles; and an exhaust unit (3) that exhausts the exhaust gas generated in the reaction vessel to a disinfestation device outside the reaction vessel. The exhaust unit includes: a main exhaust pipe (34), the first end of which is connected to the disinfestation device; branch exhaust pipes (33a, 33b), the first ends of which are connected to the second end of the main exhaust pipe; a buffer pipe (32) which extends in the vertical direction and is divided into a plurality of spaces (63a, 63b) in the vertical direction, and the plurality of spaces are respectively connected with the second end parts of the branch exhaust pipes (33a, 33b); and an exhaust connection section (31) which is connected to the spaces (63a, 63b) of the buffer pipe, and which has openings (51a-51f) extending in the vertical direction connected to the reaction vessel. The cross-sectional area of the longitudinal section of the buffer pipe is larger than that of the exhaust connection section.

Description

technical field [0001] The invention relates to a manufacturing device of a glass base material. Background technique [0002] Patent Document 1 discloses an apparatus for manufacturing a glass particle deposit body in which an exhaust pipe for exhausting exhaust gas is provided in multiple layers on a surface of a reaction vessel facing a burner. [0003] Patent Document 2 discloses a method of manufacturing an optical fiber preform by depositing glass particles on the outer periphery of a starting rod suspended vertically in a reaction vessel. The above-mentioned reaction container is provided with an air introduction port so that the purge gas may flow toward the effective area of ​​the base material of the initial rod. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2008-81359 [0005] Patent Document 2: Japanese Patent Laid-Open No. 2019-31416 [0006] For example, since the manufacturing apparatus of the glass base material of patent document 1 exhausts th...

AI Technical Summary

Problems solved by technology

If the temperature of the deposition surface in the vertical direction of the initial rod is not uniform, the outer diameter of the glass base material produced in the vertical direction, that is, the longitudinal direction, may vary greatly.

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