System and method for reducing consumption of optical fiber cooling helium

Abstract

The invention discloses a system and method for reducing consumption of optical fiber cooling helium. The system for reducing the consumption of optical fiber cooling helium comprises a closed shell,a positive electrode plate and a negative electrode plate, wherein the upper end and lower end of the shell are respectively provided with a through hole matched with an optical fiber, the two throughholes are aligned to each other to be used for the optical fiber to pass through the shell, the positive electrode plate and the negative electrode plate are oppositely arranged and fixed in the closed shell, the positive electrode plate and the negative electrode plate are respectively located on two sides of the optical fiber, a helium inlet is formed in the upper end of the shell, and a carbontetrafluoride gas inlet is formed in the lower end of the shell. According to the system and method for reducing the consumption of optical fiber cooling helium, plasma is generated by virtue of high-frequency AC power to bombard the surface of the optical fiber under the effect of an electric field force, and the adhesion of paint can be increased by one to two times, so that the requirements can be met by only introducing little helium, and the production cost of the optical fiber can be reduced.

Description

technical field [0001] The invention relates to a system and a method for reducing the consumption of helium, in particular to a system and a method for reducing the consumption of helium for optical fiber cooling. Background technique [0002] Optical fiber drawing is a process in which a preform is heated and melted by a wire drawing machine to draw an optical fiber with an outer diameter of 125 μm. Although the optical fiber is thermally deformed, there are still microcracks on the surface of the bare fiber. If it is exposed to the atmosphere, the OH- in the atmosphere will expand the microcracks. Long-term exposure will cause the fiber to break. The bare fiber must be coated quickly . [0003] In the optical fiber coating process of the prior art, a large amount of helium gas is introduced through the cooling pipe (10L / min of helium gas is required for 2500m / min). Before the cooling water in the cooling pipe enters the mold, the surface temperature of the optical fiber...

AI Technical Summary

Problems solved by technology

Although the optical fiber is thermally deformed, there are still microcracks on the surface of the bare fiber. If it is exposed to the atmosphere, the OH- in the atmosphere will expand the microcracks. Long-term exposure will cause the fiber to break. The bare fiber must be coated quickly

[0003] In the optical fiber coating process of the prior art, a large amount of helium gas is introduced through the cooling pipe (10L / min of helium gas is required for 2500m / min). Before the cooling water in the cooling pipe enters the mold, the surface temperature of the optical fiber needs to be reduced to 50~60°C, otherwise the optical fiber coating is too thin and the diameter cannot meet the requirement of 245±7um

[0004] It can be seen from the above that the current water cooling pipe is used, and helium is used as the refrigerant to complete the heat exchange between the optical fiber and the cooling water in the cooling pipe. At present, 8L of helium is used at a speed of 2500m / min in the industry, which leads to helium The amount of use is large, but helium is a non-renewable resource, and the price of helium continues to rise, which greatly increases the cost of finished optical fiber

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