Device for automatically controlling curing degree of optical fiber coating, and optical fiber production equipment

Abstract

The invention relates to a device for automatically controlling the curing degree of an optical fiber coating, and the device is characterized in that the device comprises an ultraviolet curing furnace, connectors, a gas flow sensor, an oxygen concentration measurement instrument, a controller, and an upper computer; the upper and lower sides of the ultraviolet curing furnace are provided with the connectors; the oxygen concentration measurement instrument is connected with the controller through a signal line; the upper computer is connected with the controller through a control line; the device achieves the curing degree of an optical fiber through the control of the internal oxygen concentration in the ultraviolet curing furnace, and simply and effectively solves problems of excessive curing, insufficient curing, pastiness and fiber jittering in a curing process of the optical fiber.

Description

technical field [0001] The invention relates to a control device, in particular to an automatic control device for the curing degree of optical fiber coating and optical fiber production equipment, belonging to the technical field of optical fiber production equipment. Background technique [0002] The optical fiber structure is the core, the cladding, the first layer of coating and the second layer of coating from the inside to the outside. Taking low water peak single-mode fiber as an example, the core is pure silica or silica glass doped with germanium dioxide, and the cladding is pure silica or silica doped with fluorine For glass, the coating layer is divided into one-layer coating and two-layer coating. The conventional coating is acrylic organic coating that can be cured by ultraviolet light. The reason why the structure of the optical fiber is so is that the bare fiber is very fragile and is easily damaged by direct exposure to the external environment. Therefore, t...

AI Technical Summary

Problems solved by technology

At present, there is also a shutter with an adjustable inner aperture installed on the upper opening of the UV curing furnace, and the shutter is closed during the production process. This aperture is much smaller than the inherent size of the curing furnace to prevent air from entering the upper opening of the furnace body. Too much into the furnace, affected by the normal jitter of the optical fiber and the operation of personnel, it is impossible to guarantee that the adjustment range is the same every time

In addition, nitrogen gas is only injected into the upper port of the first UV curing furnace. In order to ensure the oxygen content of the curing furnace, under normal circumstances, the flow rate of nitrogen gas introduced is relatively large, which may easily cause fiber vibration and scrape the inner wall of the curing furnace to cause fiber breakage. , to sum up, under the same nitrogen flow rate, the oxygen content in the curing furnace tends to fluctuate, which easily causes the degree of curing of the outer coating of the optical fiber to be different and affects the quality of the optical fiber. Therefore, a new solution is urgently needed to solve the above technology question

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