Deposition reaction kettle for preparing optical fiber pre-form stick

Abstract

The invention discloses a deposition reaction kettle for preparing an optical fiber pre-form stick. The deposition reaction kettle for preparing the optical fiber pre-form stick comprises a reaction kettle body; a reaction chamber for accommodating an optical stick is arranged in the reaction kettle body; air inlet mechanisms and an air outlet mechanism which are communicated with the reaction chamber are arranged on the two opposite sides of the reaction kettle body correspondingly; a blow lamp group is arranged on the wall surface, one side, on which the air inlet mechanisms are located, ofthe reaction chamber; the air inlet mechanisms are arranged on the two sides of the blow lamp group in a transverse direction; each air inlet mechanism comprises an air inlet cavity with a cavity structure; an air inlet is formed in one side, facing towards the outer part of the reaction kettle body, of the air inlet cavity; a porous wind plate is arranged one side, faceting towards the reaction cavity, of the air inlet cavity; and the air outlet mechanism is connected with a negative pressure exhaust fan. The deposition reaction kettle for preparing the optical fiber pre-form stick adopts a passive air inlet mode, fresh air enters the air inlet cavity from the air inlet to be mixed and then enters the reaction chamber from the porous wind plate, the air speed is reduced, air flow enteringthe reaction chamber is prevented from being too disordered, and the stability of the air flow is improved. Therefore, the stability of the blow lamp flame is guaranteed and the deposition efficiencyis improved.

Description

technical field [0001] The invention relates to the technical field of optical fiber manufacturing, in particular to a deposition reactor for preparing optical fiber preform rods. Background technique [0002] The deposition reactor for preparing optical fiber preforms uses SiCl 4 、H 2 , O 2 undergo hydrolysis reaction to generate SiO 2 The particles are deposited on the seed rods. The production process is a chemical reaction caused by high temperature, corrosive gas and a large amount of dust. Therefore, the production process must be carried out in a specially prepared reactor, and the exhaust system required for the reaction must be designed in the reactor. , to prevent the leakage of corrosive gas and dust. The existing deposition reactor is prone to unstable airflow in the reactor, which leads to unstable flame of the blowtorch and affects the deposition efficiency and production efficiency. SiO 2 Particles are easy to accumulate in the reactor, and the utilizatio...

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Problems solved by technology

[0003] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology, provide a deposition reactor for preparing optical fiber preform, and solve the problem that the deposition reactor in the current technology is difficult to ensure a stable air flow in the reactor, resulting in Poor flame stability, low deposition efficiency, and low raw material utilization

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