Rapid cooling device for special optical fiber drawing tower

Abstract

The utility model discloses a quick cooling device for a special optical fiber drawing tower, which comprises a fixed support, a gas pressure reducing valve, a gas inlet switch and a cooling ring, the gas pressure reducing valve and the cooling ring are both fixedly arranged on the fixed support, and a gas outlet of the gas pressure reducing valve is communicated with a gas inlet on the side surface of the cooling ring through a gas outlet pipeline. A gas inlet of the gas pressure reducing valve is communicated with a gas source through a gas inlet pipeline, a gas inlet switch is arranged on the gas inlet pipeline, the cooling ring is a cylinder with openings in the upper end and the lower end, an annular cavity is formed in the cooling ring, and a side gas inlet is formed in the outer ring wall of the cooling ring and communicated with the annular cavity. A plurality of cooling air injection holes are evenly formed in the inner ring wall of the cooling ring in the circumferential direction at intervals. The cooling device has the advantages that through the arrangement of the gas pressure reducing valve, the gas inlet switch and the cooling ring, a stable and high-speed flowing cooling gas flow layer can be formed in a cavity channel for capillary tubes formed by wire drawing to pass through in the cooling ring, the heat conduction and heat convection efficiency is greatly improved, and the cooling effect is good.

Description

Technical Field

[0001] This utility model relates to the field of glass capillary production, specifically to a rapid cooling device for a special optical fiber drawing tower. Background Technology

[0002] Special drawing towers are equipment used to produce capillary tubes. The process for producing capillary tubes by drawing is as follows: First, the prepared source tube is fixed on the rod feeding mechanism, and then fed into a high-temperature furnace. The furnace is heated to 1900-2200℃, melted, and then drawn into a capillary tube with the required diameter.

[0003] The above-mentioned solution is a commonly used method for capillary fiber drawing in the market. However, it has the following defects and shortcomings: Capillary fiber drawing ensures the capillary size by controlling temperature, rod feeding speed, and traction speed. Special fiber drawing towers are lower in height than ordinary fiber drawing towers on the market, and the distance between various components is closer. This results in slow annealing speed and slow temperature reduction during the drawing process. Capillary fiber drawing can process different sizes. Drawing sizes with an outer diameter of less than 2000μm is relatively normal, but drawing sizes with an outer diameter exceeding 2000μm poses a risk of high-temperature burns to the belt. During capillary fiber drawing, speed is generally controlled to improve production efficiency. When producing capillary sizes with larger outer diameters, the faster the traction speed, the slower the capillary cooling speed and the higher the temperature, which can lead to burns and deformation. Utility Model Content

[0004] This invention provides a rapid cooling device for special optical fiber drawing towers, aiming to overcome the above-mentioned shortcomings of existing special optical fiber drawing towers in the process of drawing capillaries.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A rapid cooling device for special optical fiber drawing towers includes a fixed bracket, a gas pressure reducing valve, an air inlet switch, and a cooling ring. The gas pressure reducing valve and the cooling ring are both fixedly installed on the fixed bracket. The outlet of the gas pressure reducing valve is connected to the side air inlet of the cooling ring through an outlet pipe. The air inlet of the gas pressure reducing valve is connected to a gas source through an air inlet pipe. The air inlet switch is provided on the air inlet pipe. The cooling ring is a cylindrical body with openings at both the top and bottom. An annular cavity is provided inside the cooling ring. The side air inlet is provided on the outer ring wall of the cooling ring and is connected to the annular cavity. Multiple cooling air jet holes are evenly spaced along the circumference on the inner ring wall of the cooling ring.

[0006] Furthermore, the fixed bracket is L-shaped, and the gas pressure reducing valve and the cooling ring are both fixed on the same side of the fixed bracket. The other side of the fixed bracket is provided with a mounting hole, and the fixed bracket is fixedly connected to the wire drawing tower body by fixing bolts provided in the mounting hole.

[0007] Furthermore, the gas pressure reducing valve is a pilot-operated pressure reducing valve or a direct-acting pressure reducing valve.

[0008] Furthermore, the output pressure of the gas pressure reducing valve is 0-0.1 MPa.

[0009] Furthermore, the gas source is compressed air, nitrogen, or argon.

[0010] Furthermore, the number of cooling jet holes is 5-8.

[0011] Furthermore, the exhaust direction of the cooling jet is perpendicular to the central axis of the cooling ring.

[0012] Furthermore, the exhaust direction of the cooling jet hole intersects the central axis of the cooling ring and forms an acute angle with the material inlet direction of the capillary tube passing through the center of the cooling ring.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] By incorporating a gas pressure reducing valve, an air inlet switch, and a cooling ring, a stable and high-speed cooling airflow layer is formed within the cavity through which the capillary tube, formed during wire drawing, passes. This significantly enhances heat conduction and convection efficiency, resulting in excellent cooling performance. The cooling airflow makes full contact with the capillary surface, effectively increasing the heat exchange rate and rapidly removing heat. This effectively prevents deformation or belt burns and melting caused by slow capillary cooling during wire drawing, and also avoids the problem of burnt or melted belts affecting the cleanliness of the capillary surface. Attached Figure Description

[0016] Figure 1 An isometric drawing of a rapid cooling device for a special optical fiber drawing tower provided by this utility model;

[0017] Figure 2 for Figure 1 A half-sectional schematic diagram of the cooling device shown.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Fixed bracket; 2. Gas pressure reducing valve; 3. Gas inlet switch; 4. Cooling ring; 5. Gas outlet pipe; 6. Annular cavity; 7. Cooling jet nozzle; 8. Mounting hole. Detailed Implementation

[0020] The technical solution provided by this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] In the description of this utility model, if terms such as "upper", "lower", "left", "right", "top", "bottom", "inner", and "outer" are used to indicate the orientation or positional relationship, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] like Figure 1 and 2 As shown, this utility model provides a rapid cooling device for a special optical fiber drawing tower, which includes a fixed bracket 1, a gas pressure reducing valve 2, an air inlet switch 3, and a cooling ring 4. The gas pressure reducing valve 2 and the cooling ring 4 are both fixedly installed on the fixed bracket 1. The outlet of the gas pressure reducing valve 2 is connected to the side air inlet of the cooling ring 4 through an outlet pipe 5. The air inlet of the gas pressure reducing valve 2 is connected to a gas source through an air inlet pipe. The air inlet switch 3 is provided on the air inlet pipe. The cooling ring 4 is a cylindrical body with openings at both the top and bottom. The cooling ring 4 has an annular cavity 6 inside. The side air inlet is provided on the outer ring wall of the cooling ring 4 and is connected to the annular cavity 6. Multiple cooling jet holes 7 are evenly spaced along the circumference on the inner ring wall of the cooling ring 4.

[0023] It should be noted that the capillary tube drawn by the special drawing tower passes through the central area of ​​the cooling ring. The forward and backward adjustment of the fixed bracket ensures that the capillary tube passes through the center of the cooling ring, avoiding contact with the inner ring wall. This also ensures that the airflow from each cooling jet hole in the circumferential direction acts on the surface of the capillary tube to an equal degree, resulting in uniform cooling and preventing capillary vibration. This cooling device adheres to the design concept of "precise airflow control and efficient heat dissipation," creating a highly efficient and stable heat dissipation system for glass capillaries formed by drawing by controlling and optimizing parameters such as airflow speed, direction, and pressure.

[0024] In one embodiment of this utility model, the fixed bracket 1 is L-shaped, the gas pressure reducing valve 2 and the cooling ring 4 are both fixed on the same side of the fixed bracket 1, and the other side of the fixed bracket 1 is provided with a mounting hole 8. The fixed bracket 1 is fixedly connected to the wire drawing tower body by a fixing bolt provided in the mounting hole 8.

[0025] It is understood that the preferred shape of the mounting bracket is L-shaped, using one right-angled side to fix the gas pressure reducing valve and cooling ring, and using the other right-angled side to connect and fix it to a suitable position on the drawing tower body. The mounting bracket is preferably made of stainless steel.

[0026] In one embodiment of this utility model, the gas pressure reducing valve 2 is a pilot-operated pressure reducing valve or a direct-acting pressure reducing valve. The output pressure of the gas pressure reducing valve 2 is 0-0.1 MPa.

[0027] It should be noted that the gas pressure reducing valve can output a stable airflow, ensuring that the airflow velocity and pressure of the airflow sent into the cooling ring for cooling are relatively stable, thus ensuring a stable heat dissipation effect on the glass capillary tube.

[0028] In one embodiment of this utility model, the gas source is compressed air, nitrogen, or argon.

[0029] It should be noted that the gas source should be clean to avoid contamination of the glass capillary tube by dust or reactive substances. When conditions permit, argon gas is preferred for cooling. Argon gas is stable and can prevent the metal components from being oxidized. At the same time, the cooling effect is better than that of air, which can lower the temperature of the glass capillary tube by 15-20°C in 1 second, and the cooling rate is 1.5-2 times that of air.

[0030] In one embodiment of this utility model, the number of cooling jet holes 7 is 5-8.

[0031] It should be noted that the preferred number of cooling jet holes is 6, with adjacent cooling jet holes spaced 60 degrees apart in the circumferential direction of the cooling ring.

[0032] In one embodiment of this utility model, the exhaust direction of the cooling jet 7 is perpendicular to the central axis of the cooling ring 4.

[0033] It is understandable that when each cooling jet nozzle sprays air perpendicular to the central axis of the cooling ring, the airflow interacts directly with the glass capillary at the center to the greatest extent. After the interaction, the airflow is dispersed and the speed is slower, so it stays in the cooling ring for a relatively longer time, resulting in a better cooling effect.

[0034] In another embodiment of this utility model, the exhaust direction of the cooling jet hole 7 intersects the central axis of the cooling ring 4 and forms an acute angle with the material inlet direction of the capillary tube passing through the center of the cooling ring 4.

[0035] In this embodiment, the cooling airflow direction forms an acute angle with the capillary feed direction, which can achieve a certain degree of countercurrent cooling effect. The direction of the airflow out of the cooling ring is the same as the direction of the capillary entering the cooling ring. Countercurrent cooling can also achieve a better cooling effect.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rapid cooling device for a special optical fiber drawing tower, characterized in that, The device includes a fixed bracket (1), a gas pressure reducing valve (2), an air inlet switch (3), and a cooling ring (4). The gas pressure reducing valve (2) and the cooling ring (4) are both fixedly installed on the fixed bracket (1). The outlet of the gas pressure reducing valve (2) is connected to the side air inlet of the cooling ring (4) through an outlet pipe (5). The air inlet of the gas pressure reducing valve (2) is connected to the gas source through an air inlet pipe. The air inlet switch (3) is provided on the air inlet pipe. The cooling ring (4) is a cylindrical body with openings at both the top and bottom. The cooling ring (4) has an annular cavity (6) inside. The side air inlet is provided on the outer ring wall of the cooling ring (4). The side air inlet is connected to the annular cavity (6). Multiple cooling jet holes (7) are evenly spaced along the circumference on the inner ring wall of the cooling ring (4).

2. The rapid cooling device for a special optical fiber drawing tower according to claim 1, characterized in that, The fixed bracket (1) is L-shaped. The gas pressure reducing valve (2) and the cooling ring (4) are both fixed on the same side of the fixed bracket (1). The other side of the fixed bracket (1) is provided with an installation hole (8). The fixed bracket (1) is fixedly connected to the wire drawing tower body by a fixing bolt provided in the installation hole (8).

3. The rapid cooling device for a special optical fiber drawing tower according to claim 1, characterized in that, The gas pressure reducing valve (2) is a pilot-operated pressure reducing valve or a direct-acting pressure reducing valve.

4. The rapid cooling device for a special optical fiber drawing tower according to claim 3, characterized in that, The output pressure of the gas pressure reducing valve (2) is 0-0.1 MPa.

5. The rapid cooling device for a special optical fiber drawing tower according to claim 1, characterized in that, The gas source is compressed air, nitrogen, or argon.

6. The rapid cooling device for a special optical fiber drawing tower according to claim 1, characterized in that, The number of cooling jet holes (7) is 5-8.

7. A rapid cooling device for a special optical fiber drawing tower according to any one of claims 1 to 6, characterized in that, The exhaust direction of the cooling jet (7) is perpendicular to the central axis of the cooling ring (4).

8. A rapid cooling device for a special optical fiber drawing tower according to any one of claims 1 to 6, characterized in that, The exhaust direction of the cooling jet (7) intersects the central axis of the cooling ring (4) and forms an acute angle with the material inlet direction of the capillary tube passing through the center of the cooling ring (4).

Images