Apparatus for manufacturing optical fiber preform part

Abstract

The invention discloses a device for producing an optical-fiber prefabricated member, which belongs to the technology of producing optical fiber. The prior device can not timely response to the changes of temperature, waste discharge velocity, material feeding velocity and the like to control the internal pressure of a reaction container in a stable state. The device for producing an optical-fiber prefabricated member is provided with a reaction container for gas-phase axial deposition, and the reaction container comprises a waste discharge pipeline. The device for producing an optical-fiber prefabricated member is characterized in that the waste discharge pipeline is connected with a main waste discharge pipeline by an automatic pressure regulation valve for supplying air, a pressure gauge and an automatic pressure regulator for a manual pressure regulation valve for supplying air, and the main waste discharge pipeline is connected with a waste discharge system. The invention can reduce the phenomenon of the uneven temperature distribution caused by the vibration of oxyhydrogen flames during reaction, prevents the conditions of uneven densities of loose media, changed growth velocity and unstable axial performance, reduces the phenomenon of disordered air currents in the reaction container and enables fine granules which are not deposited on the surfaces of the loose media to be discharged out from the reaction container in time.

Description

technical field [0001] The invention belongs to the optical fiber manufacturing technology, in particular to a device for manufacturing an optical fiber preform by vapor phase axial deposition (VAD). Background technique [0002] As one of the manufacturing methods of optical fiber base material, Vapor Axial Deposition (VAD) is favored by many manufacturers because of its high raw material utilization rate, small fluctuation of product outer diameter, continuous production, and suitable for manufacturing large preforms. It has been widely developed and applied in recent years. The specific preparation method of VAD is: a reaction vessel 2 with a waste discharge pipe 7 is adopted, and the lower part of the reaction vessel 2 is provided with a cladding blowtorch 3 and a core layer blowtorch roughly facing the waste discharge pipe 7, which are vertically arranged inside the reaction vessel 2 The seed rod 6 is installed on a rotating shaft 5 that can rotate around its own axis ...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved and the technical task proposed by the present invention are to overcome the defect that the existing device cannot respond in time to changes in temperature, waste discharge rate, feed rate, etc. to control the pressure inside the reaction vessel in a stable state, and provide a A device for manufacturing optical fiber preforms

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