Cooling device for optical fiber drawing

Abstract

The invention relates to the technical field of optical fiber drawing equipment, and discloses a cooling device for optical fiber drawing, which comprises a tower body, the inner wall of the tower body is continuously provided with a cooling unit consisting of an air blowing part and an air suction part from top to bottom, and in each unit, the air suction part is arranged at the upstream of the air blowing part, and the air suction part is arranged at the downstream of the air blowing part. The air blowing part and the air suction part are connected with an air outlet channel and an air suction channel respectively. According to the cooling device for optical fiber drawing, after the cooling gas is introduced, the gas repeatedly rolls in the cavity, so that the acting time of the gas is greatly prolonged, the use amount of the cooling gas is reduced, the cooling device is particularly suitable for helium with higher value, and the cooling requirement can be met only by using a small amount of gas; the air continuously performs small circulation in the cooling unit formed by the air blowing part and the air suction part, the air always keeps low temperature in the circulation, and secondly, the flow speed is increased, so that a boundary layer around the optical fiber can be directly damaged, the air is uniformly mixed, and the cooling capacity is further enhanced.

Description

technical field [0001] The invention relates to the technical field of optical fiber drawing equipment, in particular to a cooling device for optical fiber drawing. Background technique [0002] When manufacturing an optical fiber, it is first necessary to melt the optical fiber preform, maintain a certain tension for drawing, and then take up the wire after cooling, coating, and curing devices to become a semi-finished optical fiber. After the optical fiber leaves the drawing furnace, the temperature is relatively high. , in order to ensure the coating and curing effect, the fiber needs to be cooled when it leaves the drawing furnace. [0003] With the increase of the length of single wire drawing and the increase of wire drawing speed, there is a higher requirement for the cooling capacity of the existing wire drawing tower. The existing cooling device generally realizes cooling by feeding cooling gas and supplementing water cooling. , the gas introduced is generally heli...

AI Technical Summary

Problems solved by technology

[0003] With the increase of the length of single wire drawing and the increase of wire drawing speed, there is a higher requirement for the cooling capacity of the existing wire drawing tower. The existing cooling device generally realizes cooling by feeding cooling gas and supplementing water cooling. , the gas introduced is generally helium, hydrogen or nitrogen, but the application cost of helium is higher, the risk of hydrogen is higher, and there are higher requirements for plant and management, while the specific heat of nitrogen is lower, and the heat dissipation The effect is poor, and there is no perfect cooling device after comprehensive consideration

[0004] Secondly, due to the high height of the drawing tower, when cooling, the cooling gas passes through the drawing tower, and the temperature will rise greatly. Although the cooling is supplemented by water cooling to control the gas temperature, the temperature of the gas will still rise, especially In the vicinity of the optical fiber, a boundary layer is formed, which isolates the fresh cold air and further reduces the cooling effect

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