Fiber drawing process

A wire drawing and process technology, applied in the direction of manufacturing tools, glass manufacturing equipment, etc., can solve the problems affecting the cooling effect of helium, achieve the effect of improving the cooling effect of helium, simple structure, and improved heat conduction efficiency

Active Publication Date: 2018-06-26
HANGZHOU FUTONG COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The invention provides an optical fiber drawing process, which solves the defect that the existing optical fiber drawing process has a thick laminar bottom layer in the drawing cooling process and affects the cooling effect of helium

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0050] Embodiment 1: The embodiment of the present invention provides a cooling device 1 (see attached figure 2 , 3 , 4, 5, 6, 7), applied to step 3), the cooling device 1 cooling device includes a cooling pipe 2, and the cooling pipe is composed of a first side pipe 3 and a second side pipe 4 with the same structure , the first side pipe 3 and the second side pipe 4 are vertically separated or closed under the action of the power unit 5; The metal wall 7 on the inner side wall of the heat preservation cover 6, the metal wall 7 is connected with the heat preservation cover 6 to form a horizontally closed structure, and there is an installation cavity 8 between the metal wall 7 and the heat preservation cover 6, and the installation cavity 8 is filled with cooling water The side of the metal wall 7 facing away from the insulation cover 6 is recessed to form a groove 71; when the cooling pipe 2 is closed, the grooves 71 of the first side pipe 3 and the second side pipe 4 are s...

Embodiment 2

[0054] Embodiment 2: The temperature of the helium is 15°C. A drying device is installed at both ends of the cooling chamber. The drying device is equipped with a desiccant to effectively reduce the moisture in the cooling chamber. Under the condition that the temperature of the helium is controlled at 5°C-15°C, the condensation of the cooling water to The impact on the physical properties of the fiber on the fiber.

[0055] During the implementation of the embodiment of the present invention, helium gas at 5°C-15°C enters the cooling chamber through the intake pipe, and under the action of the groove and its folded grooves and guides, a turbulent flow is formed to destroy the optical fiber and bring it into the bottom layer of the air laminar flow, Helium is drawn out of the cooling chamber through the extraction tube. The drying device dries the air entering the cooling chamber to reduce the moisture entering the cooling chamber. The hot helium in the cooling chamber excha...

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Abstract

The invention discloses an optical fiber drawing process, which comprises the following steps: 1) melting and drawing process: the preform is melted at 2200°C-2300°C, and draws sagging by its own gravity; 2) shaping cooling process: the sagging thread of the preform is Cool down to 500°C-600°C in the shaping tube; 3) wire drawing cooling process: the wire passes through the helium in the cooling device to further cool down to 30°C-80°C; in step 3), the cooling device includes a cooling tube, which consists of the first Composed of side pipes and second side pipes; there is an installation cavity between the metal wall and the heat preservation cover, and the side of the metal wall facing away from the heat preservation cover is recessed to form a groove; the grooves of a pair of side pipes are spliced ​​to form a cooling chamber, and the groove includes folding Groove, guide piece is housed in folding groove. The invention designs a kind of optical fiber drawing process, and sets the cooling chamber formed by grooves, folding grooves, guide plates and other structures, which increases the turbulence and effectively reduces the thickness of the laminar bottom layer formed by the downward movement of the optical fiber wire, and further improves the Helium cooling effect.

Description

technical field [0001] The invention relates to the field of optical fiber production, in particular to an optical fiber drawing process. Background technique [0002] Optical fiber, short for optical fiber, is a fiber made of glass or plastic that acts as a means of light transmission. The optical fiber is composed of two layers of glass with different refractive indices. The inner layer is the optical core with a diameter of several microns to tens of microns, and the outer layer has a diameter of 0.1 to 0.2 mm. Generally, the refractive index of the inner core glass is 1% larger than that of the outer glass. According to the principle of refraction and total reflection of light, when the angle at which the light hits the interface between the inner core and the outer layer is greater than the critical angle for total reflection, the light cannot pass through the interface and is fully reflected. At present, the optical fiber used in communication is generally silica opt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/025C03B37/027
CPCC03B37/025C03B37/027C03B37/02718C03B37/032
Inventor 张立永王醒东
Owner HANGZHOU FUTONG COMM TECH CO LTD
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