MANUFACTURING APPARATUS FOR GLASS PREFORM

• Main Authors: MORIMOTO KIMIHIRO, TAKAGI MITSURU, NAKAHARA HIROTAKA, HABASAKI TOSHIMI, SUZUKI TOMOYA
• Format: Patent
• Language: English; Japanese
• Published: 04.11.2021
• Subjects: CHEMISTRY; GLASS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL

To provide a manufacturing apparatus for glass preform that can suppress a glass preform from varying in outer diameter in a longer direction.SOLUTION: A manufacturing apparatus for glass preform has: a plurality of glass composition burners 22 which are arranged vertically side by side in a reaction vessel 2, and produce glass fine particles; and a gas discharging part 3 which discharges exhaust gas produced in the reaction vessel 2 to a detoxification device outside the reaction vessel 2. The gas discharging part 3 includes: a main exhaust pipe 34 which has one end part connected to the detoxification device; branch exhaust pipes 33a, 33b which each have one end part connected to the other end part of the main exhaust pipe 34; a buffer pipe 32 such that its pipe body extends vertically and has its inside separated into a plurality of spaces 63a, 63b in a vertical direction, and the spaces 63a, 63b are connected to the other end parts of the branch exhaust pipes 33a, 33b, respectively; and an exhaust connection part 31 which is connected to the spaces 63a, 63b of the buffer pipe 32, openings 51a-51f which extend vertically being connected to the reaction vessel 2. The sectional area of a cross section of the buffer pipe 32 is larger than the sectional area of a cross section of the exhaust connection part 31.SELECTED DRAWING: Figure 1 【課題】ガラス母材の長手方向における外径変動を抑えることができる、ガラス母材の製造装置を提供する。【解決手段】反応容器２内に上下方向に並んで配置されガラス微粒子を生成する複数のガラス合成バーナ２２と、反応容器２で生じた排気ガスを反応容器２外部の除害装置へ排気する排気部３を有する。排気部３は、除害装置に一方の端部が接続された主排気管３４と、主排気管３４の他方の端部に一方の端部が接続された分岐排気管３３ａ，３３ｂと、管体が上下方向に伸び管体内が上下方向で複数の空間６３ａ，６３ｂに分離されており、分岐排気管３３ａ，３３ｂの他方の端部に空間６３ａ，６３ｂがそれぞれ接続されたバッファ管３２と、バッファ管３２の空間６３ａ，６３ｂに接続され、上下方向に伸びた開口５１ａ〜５１ｆが反応容器２に接続された排気接続部３１とを含む。バッファ管３２の縦断面の断面積は排気接続部３１の縦断面の断面積よりも大きい。【選択図】図１