Vertical cooling channel for optical fiber drawing

Abstract

The utility model relates to the technical field of optical fiber drawing processing, and discloses a vertical cooling channel for optical fiber drawing, which comprises a cooling outer pipe, a cooling inner pipe is fixedly mounted in the cooling outer pipe, and an optical fiber penetrating through the interior of the cooling inner pipe is arranged in the center of the interior of the cooling inner pipe. A first spiral flow guide plate and a second spiral flow guide plate are fixedly installed on the inner wall of the cooling inner pipe, are of the same structure and are located in the cooling inner pipe and distributed up and down. According to the cooling device, cooling gas is injected into the cooling inner pipe through the gas inlet pipe, the cooling gas in the gas inlet pipe enters in the direction of the tangent lines of the upper ends of the first spiral guide plate and the second spiral guide plate, and the cooling gas can descend along a spiral track formed between the first spiral guide plate and the second spiral guide plate, so that the cooling efficiency is improved; and the distribution effect of cold air is also optimized.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber drawing technology, and in particular to a vertical cooling channel for optical fiber drawing. Background Technology

[0002] During the optical fiber manufacturing process, the drawn optical fiber needs to be cooled in time to prevent it from deforming or being damaged due to high temperature. Although traditional optical fiber cooling channels have achieved cooling of the optical fiber to a certain extent, they still have many shortcomings.

[0003] Traditional cooling channels consume large amounts of cooling gas to cool optical fibers. This method is inefficient, unable to quickly and effectively reduce the fiber temperature to a safe range, and can cause uneven cooling, potentially leading to deformation or damage during the cooling process, thus affecting the overall quality and performance. Therefore, we propose a vertical cooling channel for optical fiber drawing. Utility Model Content

[0004] The present invention mainly addresses the technical problems existing in the prior art by providing a vertical cooling channel for optical fiber drawing.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a vertical cooling channel for optical fiber drawing, comprising an outer cooling tube, an inner cooling tube fixedly installed inside the outer cooling tube, an optical fiber penetrating the interior of the inner cooling tube at its center, a first spiral guide plate and a second spiral guide plate fixedly installed on the inner wall of the inner cooling tube, wherein the first spiral guide plate and the second spiral guide plate have the same structure and are distributed vertically inside the inner cooling tube, an air inlet pipe connected to the interior of the inner cooling tube is fixedly installed at the upper end of the outer cooling tube between the first spiral guide plate and the second spiral guide plate, and the air inlet pipe extends tangentially to the first spiral guide plate and the second spiral guide plate, a water inlet pipe is also fixedly installed at the upper end of the outer cooling tube, an inclined first guide plate is fixedly installed on the inner wall of the outer cooling tube at the lower end of the water inlet pipe, and a water outlet pipe is fixedly installed at the lower end of the outer cooling tube, and the water outlet pipe is connected to the gap between the outer cooling tube and the inner cooling tube.

[0006] Preferably, the water inlet pipe is inclined in both the horizontal and vertical directions of the vertical cross-section of the cooling outer pipe, and a through groove is opened on the cooling outer pipe below the first guide plate. A second guide plate is fixedly installed on the cooling inner pipe at the position corresponding to the through groove, and the second guide plate is inclined.

[0007] Preferably, a collection pipe is fixedly installed on the outer wall of the cooling outer pipe, and multiple reinforcing blocks are fixedly installed between the inner wall of the collection pipe and the outer wall of the cooling outer pipe.

[0008] Preferably, one end of the second guide plate is fixedly connected to the inner wall of the bottom surface of the channel, and the end of the second guide plate extends through the inside of the channel to the inside of the collection pipe. The upper surface of the outlet pipe and the corresponding position inside the collection pipe are provided with water inlet holes.

[0009] Preferably, a moisture-absorbing cotton is fixedly installed at the lower end of the cooling inner tube, and the interior of the moisture-absorbing cotton is porous.

[0010] Preferably, the cooling outer pipe is provided with multiple water inlet pipes, and the distance between two adjacent water inlet pipes increases sequentially from top to bottom. Beneficial effects

[0011] This invention provides a vertical cooling channel for optical fiber drawing. It has the following beneficial effects:

[0012] (1) The vertical cooling channel of the optical fiber drawing, the cooling gas is injected into the cooling inner tube through the air inlet pipe. The cooling gas in the air inlet pipe enters along the direction of the upper tangent of the first spiral guide plate and the second spiral guide plate. When the cooling gas descends along the spiral trajectory formed between the first spiral guide plate and the second spiral guide plate, it not only improves the cooling efficiency, but also optimizes the distribution effect of the cold air.

[0013] (2) The vertical cooling channel of the optical fiber drawing separates the gap between the cooling outer tube and the cooling inner tube into multiple independent spaces through multiple second guide plates. This makes the cooling water have a better heat dissipation effect on the cooling inner tube in the corresponding area when it enters the gap between the cooling outer tube and the cooling inner tube through the water inlet pipe. The distance between two adjacent second guide plates is increased according to the characteristic that the temperature of the optical fiber gradually decreases from top to bottom. This can save the amount of cooling water while ensuring the heat dissipation effect of the cooling water on the cooling inner tube. Attached Figure Description

[0014] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0015] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the cooling inner tube structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the side structure of the cooling outer tube of this utility model;

[0019] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0020] Legend: 1. Cooling outer pipe; 2. Collection pipe; 3. Air inlet pipe; 4. Water inlet pipe; 5. First spiral guide plate; 6. Second spiral guide plate; 7. Cooling inner pipe; 8. Moisture-absorbing cotton; 9. Water outlet pipe; 10. Water inlet hole; 11. Reinforcing block; 12. First guide plate; 13. Through groove; 14. Second guide plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1-4 As shown, a vertical cooling channel for optical fiber drawing includes an outer cooling tube 1, an inner cooling tube 7 fixedly installed inside the outer cooling tube 1, and a gap of not less than ten centimeters between the inner wall of the outer cooling tube 1 and the outer wall of the inner cooling tube 7. An optical fiber penetrating the interior of the inner cooling tube 7 is disposed at the center of the inner cooling tube 7. A first spiral guide plate 5 and a second spiral guide plate 6 are fixedly installed on the inner wall of the inner cooling tube 7. The first spiral guide plate 5 and the second spiral guide plate 6 have the same structure and are distributed vertically inside the inner cooling tube 7. The lower end of the inner cooling tube 7 is open. An air inlet pipe 3 is fixedly installed at the upper end of the cooling outer pipe 1 between the first spiral guide plate 5 and the second spiral guide plate 6, and is connected to the interior of the cooling inner pipe 7. The air inlet pipe 3 extends tangentially to the first spiral guide plate 5 and the second spiral guide plate 6. A water inlet pipe 4 is also fixedly installed at the upper end of the cooling outer pipe 1. An inclined first guide plate 12 is fixedly installed on the inner wall of the cooling outer pipe 1 at the lower end of the water inlet pipe 4. A water outlet pipe 9 is also fixedly installed at the lower end of the cooling outer pipe 1, and the water outlet pipe 9 is connected to the gap between the cooling outer pipe 1 and the cooling inner pipe 7.

[0023] In use, dry and cold cooling gas is injected into the interior of the cooling inner tube 7 through the air inlet pipe 3. The cooling gas descends along the spiral trajectory formed between the first spiral guide plate 5 and the second spiral guide plate 6. The tilt angle of the first spiral guide plate 5 and the second spiral guide plate 6 is determined by the inner diameter of the cooling inner tube 7, the pitch of the first spiral guide plate 5 and the second spiral guide plate 6, and the height of the cooling inner tube 7. In practical applications, the tilt angle of the first spiral guide plate 5 and the second spiral guide plate 6 can be calculated and adjusted according to actual parameters. When the cooling gas descends along the spiral trajectory formed between the first spiral guide plate 5 and the second spiral guide plate 6, not only is the cooling efficiency improved, but the distribution effect of the cold air is also optimized. The cooling effect is better for the light source located at the center of the interior of the cooling inner tube 7. Cooling water can be injected into the gap between the cooling outer tube 1 and the cooling inner tube 7 through the water inlet pipe 4. After the cooling water has cooled the outer wall of the cooling inner tube 7, it can be discharged out through the water outlet pipe 9. The flowing cooling water can assist in the cooling of the cooling inner tube 7.

[0024] like Figure 2 and Figure 3 As shown, the water inlet pipe 4 is inclined in both the horizontal and vertical directions of the vertical cross-section of the cooling outer pipe 1. A through groove 13 is provided on the cooling outer pipe 1 below the first guide plate 12. A second guide plate 14 is fixedly installed on the cooling inner pipe 7 at the position corresponding to the through groove 13, and the second guide plate 14 is inclined. The cooling water entering the gap between the cooling outer pipe 1 and the cooling inner pipe 7 through the inclined water inlet pipe 4 flows along the surface of the first guide plate 12 under the action of the initial velocity. When the cooling water flow velocity is greater than the downward flow velocity of the cooling water, the cooling water accumulated above the first guide plate 12 flows down along the cup wall of the cooling inner pipe 7 to assist in the cooling of the outer wall of the cooling inner pipe 7. After the cooling water cools the outer wall of the cooling inner pipe 7, it can flow out through the through groove 13 under the guidance of the second guide plate 14.

[0025] like Figure 2 As shown, a collection pipe 2 is fixedly installed on the outer wall of the cooling outer pipe 1, and multiple reinforcing blocks 11 are fixedly installed between the inner wall of the collection pipe 2 and the outer wall of the cooling outer pipe 1. One end of the multiple reinforcing blocks 11 is fixedly connected to the inner wall of the collection pipe 2, and the other end is fixedly connected to the corresponding position on the outer wall of the cooling outer pipe 1. This can be used to strengthen the connection strength between the cooling outer pipe 1 and the collection pipe 2, thereby enhancing the stability of the entire structure.

[0026] like Figure 4As shown, one end of the second guide plate 14 is fixedly connected to the inner wall of the bottom surface of the through groove 13, and the end of the second guide plate 14 extends through the inside of the through groove 13 to the inside of the collection pipe 2. The upper surface of the water outlet pipe 9 is provided with a water inlet hole 10 corresponding to the inside of the collection pipe 2. The downwardly inclined second guide plate 14 can guide the water flowing down the outer wall of the cooling inner pipe 7 into the inside of the collection pipe 2 for collection. The cooling water collected inside the collection pipe 2 can enter the inside of the water outlet pipe 9 through the water inlet hole 10 and then be discharged outward.

[0027] like Figure 2 As shown, a moisture-absorbing cotton 8 is fixedly installed at the lower end of the cooling inner tube 7. The interior of the moisture-absorbing cotton 8 is porous. The moisture-absorbing cotton 8 can be used to reduce the humidity of the gas inside the cooling inner tube 7, thereby reducing the impact of water vapor on the cooling of optical fiber drawing.

[0028] like Figure 2 As shown, the cooling outer pipe 1 is provided with multiple water inlet pipes 4, and the distance between two adjacent water inlet pipes 4 increases from top to bottom. Each water inlet pipe 4 is used in conjunction with a first guide plate 12 fixedly installed inside the cooling outer pipe 1, a through groove 13 opened through the cooling outer pipe 1, and a second guide plate 14 provided on the outer wall of the cooling inner pipe 7. The distance between adjacent first guide plates 12, through grooves 13, and second guide plates 14 is the same as the distance between two adjacent water inlet pipes 4. The gap between the cooling outer pipe 1 and the cooling inner pipe 7 is divided into multiple independent spaces by multiple second guide plates 14, so that when the cooling water enters the gap between the cooling outer pipe 1 and the cooling inner pipe 7 through the water inlet pipe 4, the cooling effect on the cooling inner pipe 7 in the corresponding area is better. The distance between two adjacent second guide plates 14 increases accordingly based on the characteristic that the temperature of the optical fiber gradually decreases from top to bottom, which can save the amount of cooling water while ensuring the cooling effect of the cooling water on the cooling inner pipe 7.

[0029] The working principle of this invention is as follows: During use, cooling gas is injected into the inner cooling tube 7 through the inlet pipe 3. The cooling gas in the inlet pipe 3 enters along the tangential direction of the upper ends of the first spiral guide plate 5 and the second spiral guide plate 6, and descends along the spiral trajectory formed by the first spiral guide plate 5 and the second spiral guide plate 6, efficiently cooling the optical fiber located at the center of the inner cooling tube 7. Simultaneously, cooling water enters the gap between the outer cooling tube 1 and the inner cooling tube 7 through the inclined water inlet pipe 4. When the flow velocity of the cooling water is greater than its downward flow velocity, the cooling water will flow downward along the cup wall of the inner cooling tube 7. Under the guidance of the second guide plate 14, the cooling water flows into the collection pipe 2 through the through groove 13. The cooling water collected inside the collection pipe 2 can enter the interior of the outlet pipe 9 through the water inlet 10 and then be discharged outward. Multiple water inlet pipes 4 are matched with the corresponding first guide plate 12, through groove 13 and second guide plate 14 to divide the gap between the cooling outer pipe 1 and the cooling inner pipe 7 into multiple independent spaces, ensuring that the cooling water can effectively dissipate heat from the corresponding area of ​​the cooling inner pipe 7. The distance between two adjacent second guide plates 14 is increased according to the characteristic that the temperature of the optical fiber gradually decreases from top to bottom, which not only ensures the cooling effect, but also saves the amount of cooling water. In addition, the moisture-absorbing cotton 8 at the lower end of the cooling inner pipe 7 can reduce the humidity of the gas in the internal area, further reducing the impact of water vapor on the cooling of the optical fiber during drawing.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vertical cooling channel for optical fiber drawing, comprising a cooling outer tube (1), characterized in that: An inner cooling tube (7) is fixedly installed inside the outer cooling tube (1). An optical fiber penetrating the interior of the inner cooling tube (7) is disposed at the center of the inner cooling tube (7). A first spiral guide plate (5) and a second spiral guide plate (6) are fixedly installed on the inner wall of the inner cooling tube (7). The first spiral guide plate (5) and the second spiral guide plate (6) have the same structure and are located vertically inside the inner cooling tube (7). The upper end of the outer cooling tube (1) is fixedly installed between the first spiral guide plate (5) and the second spiral guide plate (6). An air inlet pipe (3) is connected inside the cooling inner tube (7), and the air inlet pipe (3) extends in the tangential direction of the first spiral guide plate (5) and the second spiral guide plate (6). A water inlet pipe (4) is also fixedly installed at the upper end of the cooling outer tube (1). An inclined first guide plate (12) is fixedly installed at the lower end of the water inlet pipe (4) on the inner wall of the cooling outer tube (1). A water outlet pipe (9) is also fixedly installed at the lower end of the cooling outer tube (1), and the water outlet pipe (9) is connected to the gap between the cooling outer tube (1) and the cooling inner tube (7).

2. The vertical cooling channel for optical fiber drawing according to claim 1, characterized in that: The water inlet pipe (4) is inclined in both the horizontal and vertical directions of the vertical cross-section of the cooling outer pipe (1). A through groove (13) is provided on the cooling outer pipe (1) below the first guide plate (12). A second guide plate (14) is fixedly installed on the cooling inner pipe (7) at the position corresponding to the through groove (13), and the second guide plate (14) is inclined.

3. The vertical cooling channel for optical fiber drawing according to claim 2, characterized in that: A collection pipe (2) is fixedly installed on the outer wall of the cooling outer pipe (1), and multiple reinforcing blocks (11) are fixedly installed between the inner wall of the collection pipe (2) and the outer wall of the cooling outer pipe (1).

4. The vertical cooling channel for optical fiber drawing according to claim 3, characterized in that: One end of the second guide plate (14) is fixedly connected to the inner wall of the bottom surface of the through groove (13), and the end of the second guide plate (14) extends through the inside of the through groove (13) to the inside of the collection pipe (2). The upper surface of the water outlet pipe (9) is provided with a water inlet hole (10) at the corresponding position inside the collection pipe (2).

5. The vertical cooling channel for optical fiber drawing according to claim 4, characterized in that: The lower end of the cooling inner tube (7) is fixedly installed with moisture-absorbing cotton (8), and the interior of the moisture-absorbing cotton (8) is porous.

6. The vertical cooling channel for optical fiber drawing according to claim 5, characterized in that: The cooling outer pipe (1) is provided with multiple water inlet pipes (4), and the distance between two adjacent water inlet pipes (4) increases from top to bottom.

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