Stable flow field device of clean reaction chamber for prefabricated rod cladding deposition

Abstract

The invention discloses a stable flow field device of a clean reaction chamber for prefabricated rod cladding deposition. The stable flow field device comprises a reaction kettle and a plurality of air inlet pipelines connected with the reaction kettle; a product and a plurality of combustors are mounted on the reaction kettle; the reaction kettle is divided into an inner-outer double-layer structure by a reaction kettle outer wall and a reaction kettle inner wall; an area between the reaction kettle outer wall and the reaction kettle inner wall is a reaction kettle outer chamber; the inner area of the reaction kettle inner wall is a reaction kettle inner bin; the reaction kettle is connected with a hydrogen discharging pipeline and a plurality of air inlet pipelines, the inner wall of oneend, away from the combustors, of the reaction kettle inner bin is narrowed from two sides to the middle and then connected with a waste discharging pipeline, the front end of each combustor is located in the reaction kettle outer chamber, and the rear end of each combustor is inserted into the reaction kettle inner bin and aligned with a product. The stable flow field device has the advantages that air intake and air exhaust are uniform, the stability and cleanliness of a flow field of the reaction chamber are guaranteed, the product deposition quality is guaranteed, the reaction kettle is not prone to deformation, and the safety of production operation is guaranteed.

Description

【Technical field】 [0001] The invention relates to the technical field of equipment related to preform cladding deposition, in particular to the technical field of a stable flow field device for a clean reaction chamber for preform cladding deposition. 【Background technique】 [0002] In the process of depositing preform loose body by OVD deposition method, the reactor needs a stable flow field, which is especially critical for the reaction of larger preform rods. Any change in wind speed in the entire deposition direction will affect the reaction, making the product The outer diameter, density, etc. are not uniform, and the pass rate is reduced. At present, the reactors used for cladding deposition by various domestic preform manufacturers basically adopt a single-layer design, and most of the air volume in the reaction chamber in the reactor is mainly passive air intake. The single-layer structure design of the reaction kettle makes the temperature of the reaction chamber w...

AI Technical Summary

Problems solved by technology

The single-layer structure design of the reaction kettle makes the temperature of the reaction chamber wall and door easy to become too high as the reaction progresses, and is prone to deformation, resulting in equipment damage. In addition, the deformation process will also create gaps, and the outside wind enters the reaction kettle through the gaps. , the change of the flow field inside the reactor will have a negative impact on the reaction and deposition of the product, and the air intake from the abnormal position will also affect the cleanliness inside the reactor, and the particles will be deposited on the product and the product will be scrapped

The air inlet position is not fixed, making the flow field in the reaction chamber unstable and easily affected by the ambient temperature, making the deposition reaction unstable, and the temperature will change, affecting the deposition efficiency and quality of the product

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