A cryogenic cooling device for fiber optic drawing towers

Abstract

This utility model relates to the field of optical fiber drawing cooling technology, and more particularly to a cryogenic cooling device for an optical fiber drawing tower. The cryogenic cooling device for an optical fiber drawing tower includes: a barrel-shaped pipe, a carrying plate, a drive assembly, and a drain pipe. An optical fiber forming path is formed inside the axis of the barrel-shaped pipe. A filter barrel is installed inside the optical fiber forming path. An airflow chamber is formed between the barrel-shaped pipe and the filter barrel. Multiple cooling plates are installed on the inner wall of the airflow chamber. Cooling pipes are arranged inside the airflow chamber, specifically, the cooling pipes are arranged in a ring around the multiple cooling plates. One end of the cooling pipe is fixedly connected to an input pipe, and the other end is fixedly connected to an output pipe. A carrying plate is installed on the left side of the barrel-shaped pipe, and a cooling box is installed on the top of the carrying plate. This utility model provides a significantly shortened cooling path, significantly improved cooling efficiency, better adapts to the needs of high-speed optical fiber drawing, and ensures uniform and stable cooling effect.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber drawing and cooling technology, and in particular to a low-temperature cooling device for an optical fiber drawing tower. Background Technology

[0002] Fiber optic drawing towers are core equipment used in the manufacture of optical fibers. They work by melting and softening high-purity quartz preforms in a high-temperature furnace, then drawing them into continuous optical fibers with diameters of only tens of micrometers by a traction mechanism below. During the fiber drawing process, the molten quartz is rapidly cooled from high temperature to room temperature. The cooling rate must be controlled to ensure the structural uniformity and stable optical performance of the fiber. Furthermore, components surrounding the high-temperature furnace must be protected from damage due to high temperatures. Therefore, cryogenic cooling equipment is essential. This equipment continuously removes heat, enabling precise temperature control of the fiber cooling process and the equipment's operating environment, ensuring fiber quality and production safety.

[0003] Most of the cooling uses the barrel pipe as the main cooling chamber, with a porous filter barrel nested inside. The center of the filter barrel is the optical fiber forming path, and the annular space between the barrel pipe and the filter barrel serves as the cooling chamber and airflow channel. The coolant flows uniformly around the entire circumference through the interlayer guide within this annular space. The cooling energy is transferred to the inert gas inside the filter barrel through the filter barrel wall, and then flows from top to bottom to exchange heat with the high-temperature optical fiber in the center, ultimately achieving optical fiber cooling and shaping. However, the method of mainly contacting the optical fiber through natural diffusion results in a long cooling energy transfer path, which in turn reduces the cooling efficiency.

[0004] Therefore, it is necessary to provide a new cryogenic cooling device for fiber optic drawing towers to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a low-temperature cooling device for fiber optic drawing towers.

[0006] This utility model provides a cryogenic cooling device for an optical fiber drawing tower, comprising: a barrel-shaped pipe, a carrying plate, a drive assembly, and a drain pipe. An optical fiber forming path is formed inside the shaft of the barrel-shaped pipe, and a filter barrel is installed inside the optical fiber forming path. An airflow chamber is formed between the barrel-shaped pipe and the filter barrel. Multiple cooling plates are installed on the inner wall of the airflow chamber, and a cooling pipe is arranged inside the airflow chamber, specifically, the cooling pipe is arranged in a ring around the multiple cooling plates. One end of the cooling pipe is fixedly connected to an input pipe, and the other end is fixedly connected to an output pipe. A carrying plate is installed on the outer left side of the barrel-shaped pipe, and a cooling box is installed at the top of the carrying plate. Multiple heat dissipation fins are fixedly connected to the outside of the cooling box. A circulation pipe is installed at the end of the output pipe away from the cooling pipe, and a conveying pipe is fixedly connected at the end of the circulation pipe away from the output pipe. A jacketed cooler is installed at the bottom left side of the barrel-shaped pipe, and a drive assembly is installed at the top of the cooling box. Multiple drain pipes are installed on the inner wall of the filter barrel, and a fan is installed on the inner wall of the drain pipe.

[0007] Preferably, the drive assembly includes an output pump, the bottom end of which is fixedly connected to the top end of the cooling tank, and the output end of the output pump is fixedly connected to a connecting pipe.

[0008] Preferably, the side of the input pipe near the cooling pipe is fixedly connected to the top left side of the outer side of the barrel pipe, and the side of the output pipe near the cooling pipe is fixedly connected to the bottom right side of the outer side of the barrel pipe.

[0009] Preferably, the end of the delivery pipe furthest from the circulation pipe is fixedly connected to the bottom of the cooling box.

[0010] Preferably, the jacketed cooler is fitted over the outside of the delivery pipe.

[0011] Preferably, the end of the connecting pipe furthest from the output pump is fixedly connected to the end of the input pipe furthest from the cooling pipe.

[0012] Preferably, the outer end of the conveying pipe away from the circulation pipe is fixedly connected to the inner wall of the carrying plate.

[0013] Compared with related technologies, the cryogenic cooling device for fiber optic drawing towers provided by this utility model has the following beneficial effects: Significantly improved cooling efficiency: The coolant circulation system, constructed through components such as the output pump and connecting pipes, allows the coolant to flow efficiently within the cooling pipes. Combined with the ring-shaped arrangement surrounding the cooling chip, this ensures that the cooling capacity of the chip is fully transferred to the coolant. Simultaneously, a fan on the inner wall of the drainage pipe drives airflow, allowing the low-temperature gas cooled by the cooling chip and cooling pipes to flow directly to the optical fiber within the fiber forming path. This greatly shortens the cooling path, significantly improving cooling efficiency and better meeting the demands of high-speed optical fiber drawing.

[0014] More uniform and stable cooling effect: The cooling element and cooling pipe work together to continuously provide a stable amount of cooling to the gas in the airflow chamber. The fan drives the gas flow, ensuring that the low-temperature gas acts evenly and continuously on the optical fiber, guaranteeing a consistent cooling rate in the circumferential and axial directions of the fiber. This reduces internal stress caused by uneven cooling and improves the uniformity of the fiber structure and the stability of its optical performance. In addition, the jacketed cooler further cools the coolant in the delivery pipe, and the heat dissipation fins maintain the low temperature of the coolant in the cooling box, stabilizing the cold source of the entire cooling system and further ensuring a uniform and stable cooling effect. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of a cryogenic cooling device for an optical fiber drawing tower provided by this utility model; Figure 2 for Figure 1 The diagram shows the structural diagram of the barrel's piping. Figure 3 for Figure 2Enlarged view of point A in the image; Figure 4 for Figure 1 The diagram shows the structure of the drainage tube.

[0016] The following are the labels in the diagram: 1. Barrel pipe; 2. Fiber optic forming path; 3. Filter barrel; 4. Airflow chamber; 5. Cooling chip; 6. Cooling pipe; 7. Input pipe; 8. Output pipe; 9. Carrier plate; 10. Cooling box; 11. Heat dissipation fins; 12. Circulation pipe; 13. Delivery pipe; 14. Jacketed cooler; 15. Output pump; 16. Connecting pipe; 17. Drainage pipe; 18. Fan. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0019] Please see Figures 1 to 4 A cryogenic cooling device for an optical fiber drawing tower includes: a cylindrical barrel duct 1, the barrel duct 1 being cylindrical in shape, with an optical fiber forming path 2 formed inside its axis for optical fiber forming. This path is a channel running through the top and bottom of the barrel duct 1. A filter barrel 3 is installed inside the optical fiber forming path 2, which can filter the incoming gas and intercept impurity particles. An annular airflow chamber 4 is formed between the inside of the barrel duct 1 and the filter barrel 3. The airflow chamber 4 has a certain width to provide space for gas flow and cooling. Multiple cooling plates 5 are installed on the inner wall of the airflow chamber 4. These cooling plates 5 are evenly distributed on the inner wall of the airflow chamber 4 and can continuously release cooling energy. A cooling pipe 6 is provided, specifically, the cooling pipe 6 is arranged in a ring around the outside of multiple cooling plates 5. The direction of the cooling pipe 6 is close to the distribution of the cooling plates 5 to increase the contact area with the cooling plates 5. One end of the cooling pipe 6 is fixedly connected to an inlet pipe 7, which is used to transport coolant into the cooling pipe 6. The other end of the cooling pipe 6 is fixedly connected to an outlet pipe 8, which is used to discharge the coolant that has passed through the cooling pipe 6. The side of the inlet pipe 7 near the cooling pipe 6 is fixedly connected to the top left side of the outer side of the barrel pipe 1, and the side of the outlet pipe 8 near the cooling pipe 6 is fixedly connected to the bottom right side of the outer side of the barrel pipe 1. This connection position allows the coolant to form a more reasonable flow path in the cooling pipe 6.

[0020] The carrying plate 9 is a horizontally positioned plate-like structure installed on the outside left side of the barrel pipe 1. A cooling tank 10 is mounted on the top of the carrying plate 9. The cooling tank 10 is a closed box used to store coolant. Multiple heat dissipation fins 11 are fixedly connected to the outside of the cooling tank 10. The heat dissipation fins 11 are plate-shaped and arranged parallel to each other, increasing the contact area between the cooling tank 10 and the outside air, facilitating the dissipation of heat from the coolant inside the cooling tank 10. A circulation pipe 12 is installed at the end of the output pipe 8 away from the cooling pipe 6. The circulation pipe 12 is a pipe with a certain degree of curvature, which can change the flow direction of the coolant. The end of the circulation pipe 12 away from the output pipe 8 is fixedly connected to the delivery pipe 13. The delivery pipe 13 is used to transport the coolant back to the cooling tank 10. The end of the delivery pipe 13 away from the circulation pipe 12 is fixedly connected to the bottom end of the cooling tank 10. A jacketed cooler 14 is installed on the bottom left side of the outer side of the barrel pipe 1. The jacketed cooler 14 is fitted on the outside of the delivery pipe 13. Cooling medium can be introduced into the jacketed cooler 14 to further cool the coolant in the delivery pipe 13. The outer side of the delivery pipe 13 away from the circulation pipe 12 is fixedly connected to the inner wall of the carrying plate 9 to ensure the stability of the installation of the delivery pipe 13.

[0021] The drive assembly is installed at the top of the cooling tank 10. The drive assembly includes an output pump 15, which is a power unit. Its bottom end is fixedly connected to the top of the cooling tank 10 and is used to draw coolant from the cooling tank 10. The output end of the output pump 15 is fixedly connected to a connecting pipe 16. The connecting pipe 16 is used to transport the coolant drawn by the output pump 15 to the input pipe 7. The end of the connecting pipe 16 away from the output pump 15 is fixedly connected to the end of the input pipe 7 away from the cooling pipe 6. The guide pipe 17 is installed on the inner wall of the filter barrel 3. Multiple guide pipes 17 are evenly distributed on the inner wall of the filter barrel 3 and are used to guide the gas flow to the fiber forming path 2. A fan 18 is installed on the inner wall of the guide pipe 17. The fan 18 can rotate inside the guide pipe 17 to generate airflow and drive the gas flow.

[0022] The working principle of the cryogenic cooling device for fiber optic drawing towers provided by this utility model is as follows: First, the output pump 15 is started. Once the output pump 15 is running, it drives the connecting pipe 16 to start working, so that the coolant in the cooling tank 10 is transported to the input pipe 7 through the connecting pipe 16. Then, the input pipe 7 transfers the coolant to the cooling pipe 6. At this time, the cooling pipe 6 is wrapped around the outside of multiple cooling fins 5. The coolant flows in the cooling pipe 6 and interacts with the cooling fins 5. The cooling fins 5 continuously release cold energy. After the coolant absorbs the cold energy, its temperature decreases. Subsequently, the coolant cooled by the cooling pipe 6 flows out through the output pipe 8 and enters the circulation pipe 12. The circulation pipe 12 then guides the coolant to the delivery pipe 13. During the process of transporting the coolant in the delivery pipe 13, the jacketed cooler 14 is fitted on the outside of the delivery pipe 13 to further cool the coolant in the delivery pipe 13, ensuring that the coolant can maintain a low temperature. After that, the delivery pipe 13 transports the coolant back to the cooling tank 10. The multiple heat dissipation fins 11 on the outside of the cooling tank 10 play a role in dissipating the heat of the coolant in the cooling tank 10, maintaining the low temperature of the coolant for subsequent circulation. Meanwhile, on the inner wall of the filter barrel 3, multiple drainage tubes 17 are in operation, and the fan 18 on the inner wall of the drainage tube 17 starts to rotate. The rotation of the fan 18 generates airflow, which drives the gas flow in the airflow chamber 4. The gas in the airflow chamber 4 is cooled by the combined action of the cooling chip 5 and the cooling pipe 6, forming low-temperature gas. Under the action of the airflow driven by the fan 18, this low-temperature gas flows along the drainage tube 17 towards the optical fiber forming path 2, directly acting on the optical fiber formed in the optical fiber forming path 2, quickly removing the heat of the optical fiber, and achieving efficient cooling of the optical fiber. Throughout the process, all components work together to continuously provide a stable low-temperature cooling environment for the optical fiber drawing process, ensuring that the optical fiber can be formed at a suitable cooling rate, and ensuring the structural uniformity and optical performance stability of the optical fiber.

[0023] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A cryogenic cooling device for an optical fiber drawing tower, characterized in that, include: A barrel pipe (1) is provided with an optical fiber forming path (2) inside the axis of the barrel pipe (1). A filter barrel (3) is installed inside the optical fiber forming path (2). An airflow chamber (4) is provided between the inside of the barrel pipe (1) and the filter barrel (3). Multiple cooling chips (5) are installed on the inner wall of the airflow chamber (4). A cooling pipe (6) is provided inside the airflow chamber (4). Specifically, the cooling pipe (6) is arranged in a ring around the outside of the multiple cooling chips (5). One end of the cooling pipe (6) is fixedly connected to an input pipe (7), and the other end of the cooling pipe (6) is fixedly connected to an output pipe (8). A loading plate (9) is installed on the left side of the barrel pipe (1). A cooling box (10) is installed on the top of the loading plate (9). Multiple heat dissipation fins (11) are fixedly connected to the outside of the cooling box (10). A circulation pipe (12) is installed at the end of the output pipe (8) away from the cooling pipe (6). A conveying pipe (13) is fixedly connected at the end of the circulation pipe (12) away from the output pipe (8). A jacketed cooler (14) is installed at the bottom left side of the barrel pipe (1). The drive assembly is mounted on the top of the cooling box (10); The inner wall of the filter bucket (3) is equipped with multiple drainage pipes (17) and a fan (18) is installed on the inner wall of the drainage pipes (17).

2. The cryogenic cooling device for an optical fiber drawing tower according to claim 1, characterized in that, The drive assembly includes an output pump (15), the bottom end of which is fixedly connected to the top end of the cooling tank (10), and the output end of the output pump (15) is fixedly connected to a connecting pipe (16).

3. The cryogenic cooling device for an optical fiber drawing tower according to claim 1, characterized in that, The side of the input pipe (7) near the cooling pipe (6) is fixedly connected to the top left side of the barrel pipe (1), and the side of the output pipe (8) near the cooling pipe (6) is fixedly connected to the bottom right side of the barrel pipe (1).

4. The cryogenic cooling device for an optical fiber drawing tower according to claim 1, characterized in that, The end of the delivery pipe (13) away from the circulation pipe (12) is fixedly connected to the bottom end of the cooling box (10).

5. The cryogenic cooling device for an optical fiber drawing tower according to claim 1, characterized in that, The jacketed cooler (14) is fitted over the outside of the delivery pipe (13).

6. The cryogenic cooling device for an optical fiber drawing tower according to claim 2, characterized in that, The end of the connecting pipe (16) away from the output pump (15) is fixedly connected to the end of the input pipe (7) away from the cooling pipe (6).

7. The cryogenic cooling device for an optical fiber drawing tower according to claim 1, characterized in that, The outer end of the delivery pipe (13) away from the circulation pipe (12) is fixedly connected to the inner wall of the carrier plate (9).

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