Preparation structure and preparation device for carbon-coated optical fiber

Abstract

The utility model discloses a preparation structure and a preparation device for a carbon-coated optical fiber, and belongs to the technical field of optical fibers. The preparation structure comprises a wire drawing furnace and a reaction furnace; a preform is arranged in the wire drawing furnace; the reaction furnace is inserted into the wire drawing furnace and is opposite to the preform, an air inlet, an air outlet, an upper through hole and a lower through hole are formed in the reaction furnace, the air inlet and the air outlet are both located outside the wire drawing furnace, the air inlet is used for introducing a reaction raw material, and the air outlet is used for introducing a lower through hole; the upper through hole and the lower through hole are sequentially arranged along the axial direction of the preform rod and are used for inserting a bare fiber, and gas rings are inserted in the upper through hole and the lower through hole and are used for introducing inert gas into the gas seal. According to the preparation structure for the carbon-coated optical fiber provided by the embodiment of the utility model, the surface temperature of the bare fiber is ensured to reach the cracking temperature through the temperature field in the fiber drawing furnace, a heating device does not need to be additionally arranged, and the production cost is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical fibers, and in particular relates to a preparation structure and a preparation device for carbon-coated optical fibers. Background Art

[0002] The dense carbon film on the inner layer of the carbon-coated optical fiber has a blocking effect on water molecules and hydrogen, and has small shrinkage on the optical fiber surface and stable chemical properties. It can effectively prevent the expansion of microcracks on the optical fiber surface, delay the fatigue process of mechanical strength, and reduce the increase in losses caused by hydrogen molecules, greatly improving the performance of the optical fiber. It also brings hope for application scenarios in harsh environments such as oil wells.

[0003] At present, alkane gases are mainly used as reaction raw materials, which have low production costs and are easy to store. The by-products are mainly environmentally friendly gases, and there is no need to match a large number of post-processing equipment for the by-products. However, the temperature required for the cracking reaction of the reaction raw materials is relatively high (800-1200℃), and the surface temperature of the bare fiber after cooling from the muffle tube of the drawing furnace is much lower than the cracking temperature of the reaction raw materials, and the cracking reaction cannot be promoted. Therefore, an external heating device is usually installed behind the drawing furnace to heat the bare fiber through the heating device to crack the reaction raw materials. However, the external heating device in the drawing furnace will greatly increase the production cost. Utility Model Content

[0004] In view of the above defects or improvement needs of the prior art, the utility model provides a preparation structure and a preparation device for carbon-coated optical fiber, the purpose of which is to ensure that the surface temperature of the bare fiber entering the reaction furnace reaches the cracking temperature through the temperature field in the drawing furnace, without the need for an additional heating device. This not only greatly reduces the production cost, but also avoids the problem of blockage of the reaction furnace 2, thereby improving production efficiency.

[0005] In a first aspect, the utility model provides a preparation structure for carbon-coated optical fiber, the preparation structure comprising a drawing furnace and a reaction furnace;

[0006] A preformed rod is arranged in the wire drawing furnace;

[0007] The reaction furnace is inserted on the drawing furnace and is opposite to the preform rod. The reaction furnace is provided with an air inlet, an air outlet, an upper through hole and a lower through hole. The air inlet and the air outlet are both located outside the drawing furnace. The air inlet is used for introducing reaction raw materials. The upper through hole and the lower through hole are arranged in sequence along the axial direction of the preform rod for inserting bare fibers. Gas rings are inserted in the upper through hole and the lower through hole to introduce inert gas for air inlet sealing.

[0008] Optionally, a drainage branch pipe is coaxially inserted in the upper through hole, one end of the drainage branch pipe is located in the wire drawing furnace, the other end of the drainage branch pipe is located in the reaction furnace, and the air inlet is opposite to the outer wall of the drainage branch pipe, and an air ring is located on the drainage branch pipe.

[0009] Optionally, the outer diameter of the drainage branch pipe is 1 / 4-2 / 3 of the inner diameter of the reaction furnace;

[0010] And / or in the axial direction of the preform rod, the distance between the air inlet and one end of the drainage branch pipe facing the lower through hole is 50-500 mm.

[0011] Optionally, in the axial direction of the preform rod, the distance between the drawing furnace and the air inlet is 50-150 mm.

[0012] Optionally, the inert gas is nitrogen or helium.

[0013] Optionally, the preparation structure further includes an eddy current sensor, and the eddy current sensor is used to detect the thickness of the carbon film layer on the carbon-coated optical fiber.

[0014] Optionally, the preparation structure also includes a control component, which includes a main controller and a flow controller, the main controller is electrically connected to the eddy current sensor and the flow controller, respectively, and the flow controller is inserted in the air inlet to adjust the air intake flow of the reaction raw materials.

[0015] Optionally, the reaction furnace includes a first furnace body and a second furnace body that are interconnected, the outer diameter of the first furnace body is larger than the outer diameter of the second furnace body, the first furnace body is fixed on the inner wall of the wire drawing furnace, and the second furnace body passes through the wire drawing furnace.

[0016] Optionally, the preparation structure further includes a first temperature sensor, and the first temperature sensor is used to detect the temperature around the upper through hole.

[0017] In a second aspect, the utility model provides a preparation device, which includes a preparation structure for carbon-coated optical fiber as described in the first aspect.

[0018] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0019] In general, compared with the prior art, the above technical solutions conceived by the utility model have the following beneficial effects:

[0020] For a preparation structure for carbon-coated optical fiber provided in an embodiment of the utility model, when preparing carbon-coated optical fiber, after the drawing furnace is heated and heated, the preform rod is melted, thereby drawing to prepare bare fiber. The bare fiber passes through the upper through hole, the inner cavity of the reaction furnace and the lower through hole in sequence. Since the bare fiber directly enters the reaction furnace from the upper through hole in the high-temperature drawing furnace, the surface temperature of the upper bare fiber in the reaction furnace is still relatively high at this time, reaching the cracking temperature. At this time, the reaction raw materials entering through the air inlet will contact with the high-temperature bare fiber and be heated and cracked, and the waste gas and unreacted reaction raw materials generated by the cracking will be discharged through the air outlet, thereby forming a carbon film layer outside the bare fiber to obtain a carbon-coated optical fiber. At this time, the preparation can be completed without setting up an additional heating device, thereby reducing the production cost. In addition, only the temperature of the bare fiber is high, so that the reaction raw materials will only form carbon powder on the surface of the bare fiber, and will not be cracked in the air inlet and outlet to form carbon powder, thereby not only further reducing the loss of the reaction raw materials, but also avoiding the problem of blockage of the reaction furnace, thereby improving production efficiency.

[0021] That is to say, the preparation structure for carbon-coated optical fiber provided by the embodiment of the utility model ensures that the surface temperature of the bare fiber entering the reaction furnace reaches the cracking temperature through the temperature field in the drawing furnace, without the need for additional heating devices. This not only greatly reduces production costs, but also avoids the problem of reaction furnace blockage, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a preparation structure for a carbon-coated optical fiber provided in an embodiment of the utility model;

[0023] Figure 2 It is a structural schematic diagram of a control component provided by an embodiment of the utility model;

[0024] Figure 3 It is a structural schematic diagram of a preparation device provided in an embodiment of the utility model.

[0025] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0026] 1. Wire drawing furnace; 11. Preform rod; 2. Reactor; 21. Air inlet; 22. Air outlet; 23. Upper through hole; 231. Drainage branch pipe; 24. Lower through hole; 241. Fiber outlet pipe; 25. Air ring; 26. First furnace body; 27. Second furnace body; 3. Eddy current sensor; 4. Control component; 41. Main controller; 42. Flow controller; 43. First temperature sensor; 44. Second temperature sensor; 5. Cooling structure; 6. Coating structure; 7. Curing structure; 8. Traction structure; 100. Bare fiber. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] Example:

[0033] Figure 1 Schematic diagram of a structure for preparing a carbon-coated optical fiber provided by an embodiment of the utility model, such as Figure 1 As shown, the preparation structure includes a wire drawing furnace 1 and a reaction furnace 2.

[0034] A preform rod 11 is arranged in the wire drawing furnace 1 .

[0035] The reaction furnace 2 is inserted on the drawing furnace 1 and is opposite to the preform rod 11. The reaction furnace 2 is provided with an air inlet 21, an air outlet 22, an upper through hole 23 and a lower through hole 24. The air inlet 21 and the air outlet 22 are both located outside the drawing furnace 1. The air inlet 21 is used for introducing reaction raw materials. The upper through hole 23 and the lower through hole 24 are arranged in sequence along the axial direction of the preform rod 11 (both arranged in the vertical direction) for inserting the bare fiber 100. Gas rings 25 are inserted in the upper through hole 23 and the lower through hole 24 to introduce inert gas for air inlet sealing.

[0036] For a preparation structure for carbon-coated optical fiber provided in an embodiment of the utility model, when preparing carbon-coated optical fiber, after the drawing furnace 1 is heated and heated, the preform rod 11 is melted, thereby drawing and preparing bare fiber 100. The bare fiber 100 passes through the upper through hole 23, the inner cavity of the reaction furnace 2 and the lower through hole 24 in sequence. Since the bare fiber 100 directly enters the reaction furnace 2 from the upper through hole 23 in the high-temperature drawing furnace 1, the surface temperature of the upper bare fiber 100 in the reaction furnace 2 is still relatively high at this time, reaching the cracking temperature. At this time, the reaction raw materials entering through the air inlet 21 will contact with the high-temperature bare fiber 100 and be heated and cracked, and the waste gas and unreacted reaction raw materials generated by the cracking will be discharged through the air outlet 22, thereby forming a carbon film layer outside the bare fiber 100 to obtain a carbon-coated optical fiber. At this time, the preparation can be completed without setting up an additional heating device, thereby reducing the production cost. Moreover, only the temperature of the bare fiber 100 is high, so that the reaction raw materials will only form carbon powder on the surface of the bare fiber 100, and will not be cracked to form carbon powder in the air inlet 21 and the air outlet 22, thereby not only further reducing the loss of the reaction raw materials, but also avoiding the problem of blockage of the reaction furnace 2, thereby improving production efficiency.

[0037] That is to say, the preparation structure for carbon-coated optical fiber provided by the embodiment of the utility model ensures that the surface temperature of the bare fiber 100 entering the reaction furnace 2 reaches the cracking temperature through the temperature field in the drawing furnace 1, without the need for additional heating devices. This not only greatly reduces the production cost, but also avoids the problem of blockage of the reaction furnace 2, thereby improving production efficiency.

[0038] In addition, in the preparation structure provided by the embodiment of the utility model, the bare fiber 100 directly enters the reaction furnace 2, which can avoid the bare fiber 100 from contacting with the air for heat exchange, ensuring that the surface of the bare fiber 100 will not be significantly reduced. At the same time, it can also avoid the bare fiber 100 surface absorbing oxygen in the air, thereby interfering with the cracking reaction, and generating incompletely oxidized by-products to pollute the environment.

[0039] It is easy to understand that the air rings 25 on the upper through hole 23 and the lower through hole 24 can be filled with inert gas to achieve gas sealing of the upper through hole 23 and the lower through hole 24, so as to prevent the reaction raw materials from entering or being discharged from the drawing furnace 1. In addition, the inert gas in the upper through hole 23 can enter the lower end insulation zone of the drawing furnace 1 to improve the temperature uniformity of this area, thereby improving the temperature uniformity of the bare fiber 100 in this area. The inert gas in the lower through hole 24 can also cool down the optical fiber after coating.

[0040] For example, the inert gas may be nitrogen or helium, which are stable, safe and reliable.

[0041] Exemplarily, the gas outlet 22 may be connected to a waste gas treatment system, and the waste gas treatment system treats waste gas generated by the cracking reaction and unreacted reaction raw materials.

[0042] In this embodiment, in order to facilitate the fixed installation of the reaction furnace 2 on the wire drawing furnace 1, the reaction furnace 2 may include a first furnace body 26 and a second furnace body 27 that are interconnected, the outer diameter of the first furnace body 26 is larger than the outer diameter of the second furnace body 27, the first furnace body 26 is fixed on the inner wall of the wire drawing furnace 1, and the second furnace body 27 passes through the wire drawing furnace 1. At this time, the first furnace body 26 and the second furnace body 27 are fixed on the wire drawing furnace 1 through the step formed by the difference in outer diameter.

[0043] It should be noted that, since the first furnace body 26 is located in the reaction furnace 2, the temperature in the first furnace body 26 is still kept high, and the surface temperature of the bare fiber 100 in the first furnace body 26 is high, and a cracking reaction can occur. The temperature in the second furnace body 27 decreases from top to bottom, and the surface temperature of the top of the bare fiber 100 in the second furnace body 27 meets the cracking temperature, while the bottom of the bare fiber 100 in the second furnace body 27 can be annealed and cooled, and no cracking occurs.

[0044] Exemplarily, the upper through hole 23 is located on the first furnace body 26 , while the lower through hole 24 , the air inlet 21 and the air outlet 22 are located on the second furnace body 27 .

[0045] Continue to see Figure 1 A drainage branch pipe 231 is coaxially inserted in the upper through hole 23, one end of the drainage branch pipe 231 is located in the wire drawing furnace 1, and the other end of the drainage branch pipe 231 is located in the reaction furnace 2, and the air inlet 21 is opposite to the outer wall of the drainage branch pipe 231, and an air ring 25 is located on the drainage branch pipe 231.

[0046] In the above embodiment, on the one hand, the drainage branch pipe 231 can prevent the reaction raw materials from directly blowing the bare fiber 100, thereby preventing the bare fiber 100 from shaking. On the other hand, the reaction raw materials blown in through the air inlet 21 contact the drainage branch pipe 231 and then move axially along the outer peripheral wall of the drainage branch pipe 231 to fully contact the bare fiber 100, which is convenient for the formation of the carbon film layer.

[0047] In this embodiment, the outer diameter of the drainage branch pipe 231 is 1 / 4-2 / 3 of the inner diameter of the reaction furnace.

[0048] It is easy to understand that when the outer diameter of the drainage branch pipe 231 is too large, the reaction raw materials are not easy to contact the surface of the bare fiber 100 when moving axially along the outer peripheral wall of the drainage branch pipe 231, resulting in waste of the reaction raw materials. When the outer diameter of the drainage branch pipe 231 is too small, it is not convenient to install the gas ring 25 in the drainage branch pipe 231.

[0049] In addition, in the axial direction of the preform rod 11, the spacing L between the air inlet 21 and the end of the drainage branch pipe 231 facing the lower through hole 24 is 50-500 mm. When L is small, the reaction raw materials are easy to blow directly into the bare fiber 100, causing the bare fiber 100 to shake; and when L is large, the surface temperature of the bare fiber 100 drops greatly, and the reaction raw materials are not easy to be cracked on the surface of the bare fiber 100 below the drainage branch pipe 231.

[0050] Exemplarily, a fiber outlet tube 241 is coaxially inserted in the lower through hole 24 , and another air ring 25 is located on the fiber outlet tube 241 , so that the fiber outlet tube 241 facilitates the installation of another air ring 25 .

[0051] In addition, the optical fiber is coaxially inserted into the drainage branch pipe 231 and the fiber outlet pipe 241 .

[0052] In addition, an air inlet pipe and an air outlet pipe are respectively inserted into the air inlet 21 and the air outlet 22 to facilitate communication with external pipelines.

[0053] It should be noted that, in the present embodiment, in the axial direction of the preform 11 , the distance between the drawing furnace 1 and the air inlet 21 is 50-150 mm.

[0054] It is easy to understand that if the distance between the drawing furnace 1 and the air inlet 21 is too far, the surface temperature of the bare fiber 100 will drop too much after the bare fiber 100 passes through the reaction furnace 2 from the drawing furnace 1, and the temperature of the reaction raw materials cannot be reached. If the two are too close, it is not conducive to the introduction of the reaction raw materials into the air inlet 21. Therefore, the distance between the drawing furnace 1 and the air inlet 21 is controlled to be 50-150mm.

[0055] In one implementation of the utility model, the preparation structure also includes an eddy current sensor 3, which is used to detect the thickness of the carbon film layer on the carbon-coated optical fiber, so that the thickness of the carbon film layer is detected in real time by the eddy current sensor 3.

[0056] It should be noted that the eddy current sensor 3 is a conventional device in this field, and realizes thickness detection through the eddy current effect.

[0057] Figure 2 Schematic diagram of the structure of the control assembly provided by the embodiment of the utility model. Figure 2 As shown, the preparation structure also includes a control component 4, which includes a main controller 41 and a flow controller 42. The main controller 41 is electrically connected to the eddy current sensor 3 and the flow controller 42 respectively, and the flow controller 42 is inserted in the air inlet 21 to adjust the air intake flow of the reaction raw materials.

[0058] For example, when the eddy current sensor 3 detects that the thickness of the carbon film layer is large, the eddy current sensor 3 transmits the data to the main controller 41, and the main controller 41 controls the flow controller 42 to reduce the intake flow of the reaction raw material after processing, so that the thickness of the carbon film layer reaches the set value. When the eddy current sensor 3 detects that the thickness of the carbon film layer is small, the eddy current sensor 3 transmits the data to the main controller 41, and the main controller 41 controls the flow controller 42 to increase the intake flow of the reaction raw material after processing, so that the thickness of the carbon film layer also reaches the set value.

[0059] That is to say, the thickness of the carbon film layer can be automatically controlled by the control component 4, thereby improving production efficiency.

[0060] In addition, the preparation structure also includes a first temperature sensor 43, which is used to detect the temperature around the upper through hole 23, so as to detect the temperature of the bare fiber 100 when entering the reaction furnace 2 in real time to ensure that the temperature of the bare fiber 100 entering the reaction furnace 2 reaches the cracking temperature.

[0061] Similarly, the preparation structure also includes a second temperature sensor 44, which is used to detect the temperature around the preform 11. In addition, the first temperature sensor 43 and the second temperature sensor 44 are both electrically connected to the main controller 41 and the heating module corresponding to the drawing furnace 1, so as to simultaneously realize the temperature control of the preform 11 in the heating state and the temperature control of the bare fiber 100 entering the reaction furnace 2.

[0062] Exemplarily, when the first temperature sensor 43 and the second temperature sensor 44 detect that the temperature reaches the set requirements, wire drawing is performed, and the main controller 41 controls the flow controller 42 to turn on.

[0063] Figure 3 is a schematic diagram of a preparation device provided by an embodiment of the utility model, such as Figure 3 As shown, the preparation device includes a preparation structure for carbon-coated optical fiber.

[0064] Specifically, a cooling structure 5, a coating structure 6, a curing structure 7 and a pulling structure 8 are sequentially arranged below the preparation structure. The cooling structure 5 is used to cool the optical fiber, the coating structure 6 is used to coat the outer wall of the optical fiber, the curing structure 7 is used to cure the optical fiber, and the pulling structure 8 is used to pull the optical fiber. There are at least two coating structures 6 and curing structures 7, so as to form a multi-layer outer coating layer outside the carbon film layer.

[0065] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A preparation structure for carbon-coated optical fiber, characterized in that: The preparation structure comprises a wire drawing furnace (1) and a reaction furnace (2); A preformed rod (11) is arranged in the wire drawing furnace (1); The reaction furnace (2) is inserted into the drawing furnace (1) and is opposite to the preform rod (11). The reaction furnace (2) is provided with an air inlet (21), an air outlet (22), an upper through hole (23) and a lower through hole (24). The air inlet (21) and the air outlet (22) are both located outside the drawing furnace (1). The air inlet (21) is used for introducing reaction raw materials. The upper through hole (23) and the lower through hole (24) are arranged in sequence along the axial direction of the preform rod (11) for inserting bare fibers (100). Gas rings (25) are inserted into the upper through hole (23) and the lower through hole (24) for introducing inert gas for air inlet sealing.

2. A preparation structure for carbon-coated optical fiber according to claim 1, characterized in that: A drainage branch pipe (231) is coaxially inserted in the upper through hole (23), one end of the drainage branch pipe (231) is located in the wire drawing furnace (1), and the other end of the drainage branch pipe (231) is located in the reaction furnace (2), and the air inlet (21) is directly opposite to the outer wall of the drainage branch pipe (231), and an air ring (25) is located on the drainage branch pipe (231).

3. A preparation structure for carbon-coated optical fiber according to claim 2, characterized in that: The outer diameter of the drainage branch pipe (231) is 1 / 4 to 2 / 3 of the inner diameter of the reaction furnace (2); And / or in the axial direction of the preform rod (11), the distance between the air inlet (21) and one end of the drainage branch pipe (231) facing the lower through hole (24) is 50-500 mm.

4. A preparation structure for carbon-coated optical fiber according to claim 1, characterized in that: In the axial direction of the preform rod (11), the distance between the wire drawing furnace (1) and the air inlet (21) is 50-150 mm.

5. A preparation structure for carbon-coated optical fiber according to any one of claims 1 to 4, characterized in that: The inert gas is nitrogen or helium.

6. A preparation structure for carbon-coated optical fiber according to any one of claims 1 to 4, characterized in that: The preparation structure also includes an eddy current sensor (3), and the eddy current sensor (3) is used to detect the thickness of the carbon film layer on the carbon-coated optical fiber.

7. A preparation structure for carbon-coated optical fiber according to claim 6, characterized in that: The preparation structure also includes a control component (4), the control component (4) includes a main controller (41) and a flow controller (42), the main controller (41) is electrically connected to the eddy current sensor (3) and the flow controller (42), respectively, and the flow controller (42) is inserted in the air inlet (21) to adjust the air intake flow of the reaction raw materials.

8. A preparation structure for carbon-coated optical fiber according to any one of claims 1 to 4, characterized in that: The reaction furnace (2) comprises a first furnace body (26) and a second furnace body (27) which are interconnected, the outer diameter of the first furnace body (26) is larger than the outer diameter of the second furnace body (27), the first furnace body (26) is fixed on the inner wall of the wire drawing furnace (1), and the second furnace body (27) passes through the wire drawing furnace (1).

9. A preparation structure for carbon-coated optical fiber according to any one of claims 1 to 4, characterized in that: The preparation structure further comprises a first temperature sensor (43), wherein the first temperature sensor (43) is used to detect the temperature around the upper through hole (23).

10. A preparation device, characterized in that: The preparation device comprises a preparation structure for carbon-coated optical fiber according to any one of claims 1-9.

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