Improved MCVD system tail gas powder removal rod

Abstract

The invention discloses an improved MCVD system tail gas powder removal rod. The improved MCVD system tail gas powder removal rod comprises a rod head and a rod body connected with the rod head; one end of the rod head is provided with four concave air guide grooves around the center axis, and the other end of the rod head is provided with an internal thread; the two ends of each rod body sectionare provided with an external thread and an internal thread, and the multiple rod body sections are connected to form the integrated rod body through the external threads and the internal threads; andthe external thread at one end of the integrated rod body is connected with the internal thread of the rod head so that the tail gas powder removal rod can be formed. According to the improved MCVD system tail gas powder removal rod, in order to avoid the situation that a tail pipe is blocked by residual powder, the phenomenon that the tail pipe is poor in circulation and is blocked is effectively relieved through the improved tail gas powder removal rod, and the capacity of removing the residual powder adhering to the interior of the tail pipe is improved; the powder removal rod is made of Hartz alloy and polytetrafluoroethylen, and the flexibility and corrosion resistance of the rod body are greatly improved; by forming the four concave air guide grooves in the rod head, airflow smoothness of the tail pipe is maintained, the constant tail pressure is ensured, accordingly, reaction pipe deposition is uniform, and the product quality consistency is ensured.

Description

technical field [0001] The invention relates to the technical field of special optical fiber manufacturing, in particular to an improved MCVD (chemical deposition process) system exhaust ash removal rod. Background technique [0002] Special optical fiber is a new type of material for many weapons and equipment, mainly used in high-power fiber lasers, fiber optic gyroscope rings, outer waveguides, and SLD module pigtails. All kinds of special optical fibers are drawn from special optical fiber preforms. During the preparation process of the preform, the tail pipe is blocked by the residual material and powder generated by the reaction. Due to the accumulation of reaction tail gas and the thermophoretic effect, the tail pipe is not smooth and blocked, causing pressure and flow fluctuations in the reaction process, resulting in serious deformation of the reaction tube. , resulting in problems such as product quality degradation. The traditional ash removal rod is relatively ...

AI Technical Summary

Problems solved by technology

During the preparation process of the preform, the tail pipe is blocked by the residual material and powder generated by the reaction. Due to the accumulation of reaction tail gas and the thermophoretic effect, the tail pipe is not smooth and blocked, causing pressure and flow fluctuations in the reaction process, resulting in serious deformation of the reaction tube. , resulting in problems such as product quality degradation

The traditional ash removal rod is relatively rigid, and it is not easy to completely scrape the residual powder of the tail pipe. In the MCVD process, it is easy to cause problems such as poor tail pipe and blockage, which makes the diameter of the reaction tube fluctuate greatly during deposition, resulting in consistent products. Therefore, it is necessary to propose a practical and feasible improvement plan for the ash removal rod to improve its flexibility and usability

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