Graphite furnace for sintering glass loose mass

A technology for sintering glass and graphite furnace, applied in the field of graphite furnace, can solve the problems of reducing the service life of graphite furnace, unbalanced pressure of quartz tube, easy deformation of quartz tube, etc., and achieves the effect of improving service life, ensuring balance and preventing deformation

Active Publication Date: 2014-03-12
ZHEJIANG FUTONG OPTICAL FIBER TECH +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of dehydration vitrification of glass loose body, it is necessary to add inert gas, dehydration gas and oxygen in the quartz sleeve to complete the dehydration vitrification of glass l...

Method used

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  • Graphite furnace for sintering glass loose mass
  • Graphite furnace for sintering glass loose mass
  • Graphite furnace for sintering glass loose mass

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Embodiment Construction

[0033] The core of the invention is to provide a graphite furnace for sintering glass loose body to improve service life.

[0034] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] Please refer to figure 1 , the invention discloses a graphite furnace for sintering glass loose bodies, comprising a graphite furnace body 1 with an installation hole at one end and a quartz tube 4 connected to the other end of the graphite furnace body 1, wherein the outlet of the quartz tube 4 The end protrudes from the installation hole, and the graphite furnace includes a sealing device 6 for sealing the installation hole of the graphite furnace body 1, and the graphite furnace body 1 is provided with an air intake device; the graphite furnace body 1 and the quartz tube 4 are connected There is an exhaust 90...

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Abstract

The invention discloses a graphite furnace for sintering glass loose mass. The graphite furnace comprises a graphite furnace body provided with a mounting hole at one end and a quartz tube connected with the other end of the graphite furnace body, wherein an air outlet end of the quartz tube extends out of the mounting hole. The graphite furnace further comprises a sealing device arranged at the mounting hole of the graphite furnace body and used for sealing the mounting hole, wherein the sealing device is provided with an air inlet unit; and the joint of the graphite furnace body and the quartz tube is provided with an air exhausting device. In the embodiment of the invention, the graphite furnace body is set as a sealed structure by the sealing device, and the air inlet unit and the air exhausting device are arranged on the graphite furnace body. In the production process, when a process gas is introduced into the quartz tube, a protective gas is introduced into the sealed graphite furnace through the air inlet unit to increase the external pressure of the quartz tube, thus the balance between internal pressure and external pressure of the quartz tube is guaranteed to prevent the quartz tube from deformation. Consequentially, the service life of the graphite furnace is prolonged effectively.

Description

technical field [0001] The invention relates to the technical field of optical fiber preparation, in particular to a graphite furnace for sintering glass loose body. Background technique [0002] Dehydration sintering of glass loose body is one of the main steps in producing optical fiber preform. The core rod glass loose body manufactured by VAD (vertical axial deposition, vertical axial deposition method) needs to be dehydrated and sintered to obtain an optical fiber preform core rod with a low water peak, which is produced by OVD (Outside Vapor Deposition, external vapor deposition method) The obtained loose optical fiber preform also needs to be dehydrated and vitrified to obtain a transparent optical fiber preform. [0003] At present, the heating furnaces used in the optical fiber preform manufacturing industry mainly include vacuum graphite furnaces, graphite furnaces and silicon-molybdenum rod resistance furnaces. With the continuous increase of the size of the VAD...

Claims

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Application Information

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IPC IPC(8): C03B5/00C03B37/018
Inventor 章海峰卢卫民冯高峰杨军勇陈坚盾
Owner ZHEJIANG FUTONG OPTICAL FIBER TECH
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