CN213570185U

CN213570185U - Optical fiber production equipment

Info

Publication number: CN213570185U
Application number: CN202021498097.0U
Authority: CN
Inventors: 廖度君; 刘文早; 李应剑; 贾龙; 向勇
Original assignee: Chengdu Sei Optical Fiber Co ltd
Current assignee: Chengdu Sei Optical Fiber Co ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-06-29
Anticipated expiration: 2030-07-24

Abstract

The utility model discloses an optical fiber production equipment, including melting prefabricated stick, the high temperature furnace that generates optic fibre and the cooling tube that is used for cooling off optic fibre, be equipped with between the end opening of high temperature furnace and the cooling tube and be used for the heat retaining cover of optic fibre. Before the optical fiber enters the cooling pipe for cooling, the heat-insulating cover prevents the temperature of the optical fiber from being rapidly reduced. The optical fiber is slowly cooled in the heat-insulating cover, and the internal stress in the optical fiber is eliminated. The bending of the optical fiber is reduced, and the warping degree performance of the optical fiber is improved.

Description

Optical fiber production equipment

Technical Field

The utility model relates to an optical fiber production technical field, in particular to optical fiber production equipment.

Background

In the production process of the optical fiber, the prefabricated rod is heated and melted in a wire drawing furnace, then is rapidly contracted under the action of surface tension, and is simultaneously drawn under the driving of a traction wheel to form the optical fiber. The optical fiber sequentially passes through the cooling pipe, the coating device and the UV curing device and finally enters the wire collecting device for collection and storage.

The wire drawing speed is higher in the production process. The optical fiber enters the cooling pipe rapidly after coming out of the heating furnace, the temperature in the cooling pipe is low, and the optical fiber is cooled rapidly, so that the optical fiber has large stress in the cooling pipe, the warping degree of the optical fiber is small, the quality of the optical fiber is influenced, and the subsequent cabling is influenced. And a high-temperature annealing furnace is arranged at the lower opening of the wire drawing furnace in part of enterprises, and the high-temperature annealing furnace is used for annealing the optical fiber so as to reduce the stress in the optical fiber. However, the high temperature annealing furnace needs to consume a large amount of electric energy to heat the optical fiber, which results in complex process and high cost of the optical fiber production equipment.

Therefore, how to simplify the structure of the optical fiber production equipment is a technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an optic fibre production facility, it makes optic fibre maintain higher temperature through the cover that keeps warm, avoids the temperature to descend fast and causes the inside internal stress that produces of optic fibre to remain.

In order to achieve the above object, the utility model provides an optical fiber production equipment, including melting prefabricated excellent, the high temperature furnace that generates optic fibre and the cooling tube that is used for cooling off optic fibre, the end opening of high temperature furnace with be equipped with between the cooling tube and be used for the heat retaining cover of optic fibre.

Preferably, the heat preservation cover comprises an opening and closing heat preservation cylinder and a fixed heat preservation cylinder, the opening and closing heat preservation cylinder is located on one side close to the high-temperature furnace, and the fixed heat preservation cylinder is located on one side close to the cooling pipe.

Preferably, the opening and closing thermal insulation barrel comprises two half shells hinged with each other, and free ends of the two half shells are connected in a sealing mode.

Preferably, the opening and closing heat-preserving cylinder is communicated with a hearth of the high-temperature furnace, and high-temperature gas in the high-temperature furnace can enter the opening and closing heat-preserving cylinder.

Preferably, the contact surfaces of the two half shells are provided with sealing gaskets.

Preferably, the high-temperature furnace further comprises a floor, the floor is provided with a through hole penetrating along the thickness and used for allowing the optical fiber to pass through, and the upper end and the lower end of the opening and closing heat preservation cylinder are provided with sealing fillers respectively keeping sealing with the lower opening of the high-temperature furnace and the floor.

Preferably, the fixed heat-insulating cylinder is communicated with the opening and closing heat-insulating cylinder, and high-temperature gas in the high-temperature furnace can enter the fixed heat-insulating cylinder.

The utility model provides an optical fiber production equipment, including melting prefabricated stick, the high temperature furnace that generates optic fibre and the cooling tube that is used for cooling off optic fibre, be equipped with between the end opening of high temperature furnace and the cooling tube and be used for the heat retaining cover of optic fibre.

Before the optical fiber enters the cooling pipe for cooling, the heat-insulating cover prevents the temperature of the optical fiber from being rapidly reduced. The optical fiber is slowly cooled in the heat-insulating cover, and the internal stress in the optical fiber is eliminated. The bending of the optical fiber is reduced, and the warping degree performance of the optical fiber is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an optical fiber production apparatus provided by the present invention.

Wherein the reference numerals in fig. 1 are:

a high temperature furnace 1, an opening and closing heat preservation cylinder 2, a fixed heat preservation cylinder 3, a prefabricated rod 4 and an optical fiber 5.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an optical fiber production apparatus provided by the present invention.

The utility model provides an optic fibre production facility, the structure is shown in figure 1. The optical fiber production apparatus includes a high temperature furnace 1 and a cooling tube. Wherein the high temperature furnace 1 is used to melt the preform 4. The preform 4 is melted and thinned into an optical fiber 5, and is discharged from the lower opening of the high temperature furnace 1. The cooling tube is located below the lower opening of the high temperature furnace 1 and is used for cooling the optical fiber 5. The generated optical fiber 5 enters the cooling pipe to be cooled under the driving of the traction wheel, then enters the coating device to be coated with protective resin, is cured by the UV curing device, and finally is wound on the periphery of the take-up device to be collected. In the production process of the optical fiber 5, after the optical fiber 5 is discharged from the lower opening of the high-temperature furnace 1, the optical fiber is rapidly cooled in the air, so that large internal stress is remained in the optical fiber 5, and the warping degree of the optical fiber 5 is small. And the heat preservation cylinder is positioned between the lower opening of the high-temperature furnace 1 and the cooling pipe and is used for preserving heat of the optical fiber 5, so that the optical fiber 5 is slowly cooled, the internal stress in the optical fiber is eliminated, and the warping degree of the light is further improved. The structures of the traction wheel, the coating device, the UV curing device and the take-up device can refer to the prior art, and are not described herein again.

Optionally, a floor is usually arranged below the high-temperature furnace 1, and the cooling pipe is located below the floor. The floor has a through hole penetrating in the thickness direction, and the optical fiber 5 passes through the through hole into the cooling pipe. The heat preservation cover comprises an opening and closing heat preservation cylinder 2 and a fixed heat preservation cylinder 3, wherein the opening and closing heat preservation cylinder 2 is positioned between the high-temperature furnace 1 and the floor. The fixed heat-insulating cylinder 3 is positioned between the floor and the cooling pipe.

Optionally, the opening and closing thermal insulation cylinder 2 comprises two half shells, and the two half shells are separated along a plane where the axis of the opening and closing thermal insulation cylinder 2 is located. One side of the two half shells is hinged through a hinge, and the other side is a free end which can be opened and closed. The free end is provided with a buckle, when the two half shells are folded, the buckle is clamped, the opening and closing heat preservation cylinder 2 forms a complete cylinder body, and heat preservation is carried out on light rays in the heat preservation cylinder body. When the two half shells are opened, an operator can normally perform operations such as turning off the head, observing the inside of the furnace, opening and closing the lower diaphragm and the like.

Optionally, the opening and closing heat preservation cylinder 2 is communicated with a hearth of the high-temperature furnace 1. The high temperature furnace 11 is made of graphite pieces, so inert gas needs to be filled in the high temperature furnace 1 for protection. The excess inert gas is discharged from the lower part of the high temperature furnace 1 and flows into the openable heat-insulating cylinder 2. Meanwhile, because the speed of the optical fiber 5 is high, the optical fiber 5 can carry a large amount of high-temperature gas out of the high-temperature furnace 1 after being pulled out and flows into the opening and closing heat preservation cylinder 2. A large amount of high-temperature gas enables the opening and closing heat-insulating cylinder 2 to be heated rapidly, the opening and closing heat-insulating cylinder 2 reaches 500-600 ℃, and the heat-insulating effect can be effectively achieved.

Optionally, in order to reduce the leakage of high-temperature gas, the contact surface of the two half shells is provided with a sealing gasket, so that the high-temperature gas is ensured to flow along the opening and closing heat preservation cylinder 2 all the time. The upper end and the lower end of the opening and closing heat preservation cylinder 2 are also provided with sealing fillers, and when the opening and closing heat preservation cylinder 2 is closed, the sealing fillers at the upper end and the lower end are respectively attached to the lower opening and the floor of the high-temperature furnace 1, so that the leakage of high-temperature gas is further reduced. The sealing gasket and the sealing filler can be made of high-temperature resistant materials such as asbestos and the like.

Optionally, the fixed heat-insulating cylinder 3 is communicated with the opening and closing heat-insulating cylinder 2, and high-temperature gas can penetrate through a through hole in the floor and enter the fixed heat-insulating cylinder 3. The temperature of the high-temperature gas is also reduced continuously in the flowing process, and when the high-temperature gas enters the fixed heat-insulating cylinder 3, the temperature in the fixed heat-insulating cylinder 3 can reach 200-300 ℃. The temperature reduction of the heat preservation meets the requirement of reducing the temperature of the optical fiber 5, and can also avoid the internal stress accumulation in the optical fiber 5. Sealing filler can be arranged between the upper end of the fixed heat-insulating cylinder 3 and the floor, and a preset gap is formed between the lower end of the fixed heat-insulating cylinder 3 and the cooling pipe. High-temperature gas can be discharged from the preset gap, the high-temperature gas is prevented from influencing the cooling of the optical fiber 5, and meanwhile, the optical fiber 5 can be further cooled when passing through the preset gap.

In this embodiment, be equipped with the heat preservation cover between high temperature furnace 1 and the cooling tube for keep warm to optic fibre 5, eliminate the internal stress of optic fibre 5 through the mode of slow cooling, and then improve the angularity of optic fibre 5. Compared with an annealing furnace, the heat-insulating cover in the application is obviously simpler in structure, lower in cost and easy to maintain. In addition, the heat-retaining cover retains the heat of the optical fiber 5 by high-temperature gas introduced into the high-temperature furnace 1. Not only effectively utilizes high-temperature gas and reduces energy consumption, but also forms more uniform and gentle temperature gradient in the process of cooling the optical fiber 5, thereby ensuring the annealing effect of the optical fiber 5. The warp of the optical fiber 5 is measured and recorded by a production unit in actual production. Before the heat preservation cover is adopted, the monthly average value of the optical fiber warping degree is 12.34m, after the heat preservation cover is adopted, the monthly average value of the optical fiber warping degree is 27.50m, and the warping degree of the optical fiber 5 is obviously improved.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

It is right above that the utility model provides an optical fiber production equipment has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The optical fiber production equipment is characterized by comprising a high-temperature furnace (1) for melting a preform rod (4), generating an optical fiber (5) and a cooling pipe for cooling the optical fiber (5), wherein a heat-preserving cover for preserving heat of the optical fiber (5) is arranged between a lower opening of the high-temperature furnace (1) and the cooling pipe; the heat preservation cover comprises an opening and closing heat preservation cylinder (2) and a fixed heat preservation cylinder (3), the opening and closing heat preservation cylinder (2) is located at one side close to the high-temperature furnace (1), and the fixed heat preservation cylinder (3) is located at one side close to the cooling pipe.

2. Optical fiber production plant according to claim 1, wherein said openable and closable heat-retaining cylinder (2) comprises two half-shells hinged to each other, the free ends of said half-shells being sealingly connected.

3. Optical fiber production equipment according to claim 2, wherein the open-close heat-preserving cylinder (2) is communicated with a hearth of the high-temperature furnace (1), and high-temperature gas in the high-temperature furnace (1) can enter the open-close heat-preserving cylinder (2).

4. Optical fibre production apparatus according to claim 3 wherein the contact surfaces of the half shells are provided with sealing gaskets.

5. The optical fiber production equipment according to claim 4, further comprising a floor, wherein the floor is provided with a through hole penetrating along the thickness for the optical fiber (5) to pass through, and the upper and lower connecting ends of the opening and closing heat preservation cylinder (2) are provided with sealing fillers respectively keeping the sealing with the lower opening of the high temperature furnace (1) and the floor.

6. Optical fiber production apparatus according to any one of claims 1 to 5, wherein the fixed heat-retaining cylinder (3) is in communication with the openable heat-retaining cylinder (2), and high-temperature gas in the high-temperature furnace (1) can enter the fixed heat-retaining cylinder (3).