Optical fiber drawing furnace with low helium consumption

Abstract

The invention relates to an optical fiber drawing furnace with low helium consumption, and relates to the technical field of optical fiber manufacturing, the optical fiber drawing furnace comprises a drawing furnace body and a first gas inlet, and an optical fiber preform rod heating area and an optical fiber forming area which are communicated with each other are arranged in the drawing furnace body in the length direction; two exhaust ports are respectively formed in two ends of the fiber drawing furnace body, and are respectively communicated with the optical fiber preform rod heating area and the optical fiber forming area; the first gas inlet is located between the two gas outlets and is communicated with the optical fiber forming area, so that first gas is introduced into the optical fiber forming area and is discharged from the two gas outlets. According to the invention, by adopting a mode of introducing gas from the first gas inlet and exhausting the gas up and down respectively, the speed of discharging the first gas out of the furnace body is greatly reduced, the retention time of the first gas in the furnace body is prolonged, and the use amount of helium in the first gas is greatly reduced while a protection effect is achieved in the optical fiber forming process.

Description

Technical field[0001]The present application relates to the field of fiber manufacturing techniques, and in particular, there is a fiber optic drawing furnace of a low height amount.Background technique[0002]At present, in the optical fiber production process, helium is used as a protective gas, and the heat can be quickly exported during the drawing process, and the fiber can protect the fiber in the range of inert gas. The method of protecting the gas protection can effectively increase the wire drawing speed of the fiber and the quality of fiber.[0003]Helium is widely applied to industrial production field due to its advantages such as stable, small molecular weight, and good thermal conductivity, and as a non-renewable resource, over time is increasing, while stocks continue to decrease, resulting in prices Surprising, for shortcomings.[0004]In the relevant technologies, fiber-based manufacturers and research institutions are proposed to use other alternative gases as protective...

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Problems solved by technology

[0007] The embodiment of the present application provides an optical fiber drawing furnace with low helium consumption to solve the problem that the optical fiber drawing furnace in the related art adopts a downward exhaust method, which has a huge demand for helium, and rashly reducing the helium consumption will cause serious problems. problems that seriously affect the quality of the fiber

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