A quartz fiber thermal fusion bundling device

Abstract

This utility model discloses a quartz fiber thermal fusion bonding device, relating to the field of quartz fiber manufacturing technology. The device includes a high-frequency heating chamber, a crucible, a heating coil, an infrared thermometer, and an argon protective gas chamber. The crucible is mounted on the high-frequency heating chamber, and the heating coil is mounted on the crucible. The high-frequency heating chamber is connected to the argon protective gas chamber. The infrared thermometer is mounted on the high-frequency heating chamber via a mounting mechanism. This utility model can monitor the temperature in real time, control the heating temperature, and respond to temperature fluctuations in real time, ensuring the stability of the fusion temperature and improving the stability of the quartz fiber thermal fusion bonding. In addition, the synergistic effect of negative pressure and argon protection allows the negative pressure to accelerate the discharge of gas from the melting zone, and the argon gas to form an inert atmosphere, reducing the bubble generation rate. At the same time, the negative pressure promotes the diffusion and fusion of quartz molecules, and combined with the high-temperature melting of the heating coil, the fusion rate is improved, meeting the requirements of high-precision fiber fusion bonding.

Description

Technical Field

[0001] This utility model relates to the field of quartz optical fiber manufacturing technology, specifically to a quartz optical fiber thermal fusion bundling device. Background Technology

[0002] With the development of industries such as laser projection, laser plate making, and laser lighting, the application of fiber optic bundles is becoming increasingly widespread. A fused silica fiber bundle is an optical device composed of multiple silica fiber bundles joined together using thermal fusion technology. This device has multiple input and output channels and can be used for optical signal coupling, distribution, and transmission. Silica fiber itself has low loss and high transmittance; by combining multiple fibers, a fused silica fiber bundle can achieve even higher optical signal transmission efficiency.

[0003] However, in existing quartz fiber fusion splicing technologies, the traditional open-loop heating control mode generally cannot respond to temperature fluctuations in real time, resulting in unstable splicing quality and difficulty in meeting the requirements of high-precision fiber fusion splicing. Utility Model Content

[0004] The purpose of this invention is to provide a quartz optical fiber thermal fusion bundling device to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a quartz optical fiber thermal fusion bundling device, comprising a high-frequency heating box, a crucible, a heating coil, a vacuum pump, an infrared thermometer, and an argon protective gas circuit box. The crucible is disposed inside the high-frequency heating box, and the heating coil is disposed on the crucible. The high-frequency heating box is connected to the argon protective gas circuit box. The infrared thermometer is mounted on the high-frequency heating box through a mounting mechanism, and the vacuum pump is disposed on one side of the high-frequency heating box.

[0006] In a preferred embodiment: a groove is provided on the upper wall of the high-frequency heating box, and the crucible is installed at the center of the groove.

[0007] In a preferred embodiment: the heating coil is sleeved on the outer wall of the crucible and fixedly connected to the crucible; the heating coil is electrically connected to the high-frequency heating box through a first wire; and a tooling fixture is provided above the crucible.

[0008] In a preferred embodiment, the infrared thermometer is connected to the controller inside the high-frequency heating box via a wireless signal.

[0009] In a preferred embodiment: the high-frequency heating box is connected to the vacuum pump used to extract gas from the high-frequency heating box via a connecting pipe, the connecting pipe is clamped on the tooling fixture, the lower end of the connecting pipe is inserted into the crucible, and the upper end of the connecting pipe is connected to a sealing pipe.

[0010] In a preferred embodiment: the mounting mechanism includes a base, a damping shaft, and a connecting rod. The base is fixedly mounted on the upper end of the high-frequency heating box by fastening bolts. The upper end of the base is fixedly connected to the damping shaft, and the upper end of the damping shaft is rotatably connected to the connecting rod. The end of the connecting rod away from the damping shaft is provided with an arc-shaped groove, and the infrared thermometer is fixedly installed in the arc-shaped groove.

[0011] In a preferred embodiment: a pipe is fixedly connected to one side of the high-frequency heating box, and the end of the pipe away from the high-frequency heating box is connected to the argon protective gas circuit box.

[0012] In a preferred embodiment: the fitting includes pipe one, pipe two, and a flow controller. One side of the argon protective gas circuit box is connected to pipe one. The side of pipe one away from the argon protective gas circuit box is connected to the inlet end of the flow controller. The outlet end of the flow controller is connected to pipe two. The end of pipe two away from the flow controller is connected to the high-frequency heating box. The flow controller is electrically connected to the argon protective gas circuit box through a second wire.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0014] This invention utilizes a high-frequency heating chamber, crucible, heating coil, vacuum pump, infrared thermometer, and argon protective gas chamber. The infrared thermometer, in conjunction with the high-frequency heating chamber, can monitor the temperature in real time and control the heating temperature of the heating coil, thereby responding to temperature fluctuations in real time and ensuring the stability of the fusion splicing temperature. This improves the stability of the quartz fiber thermal fusion bundle and increases the batch pass rate. Furthermore, the synergistic effect of negative pressure and argon protection accelerates the discharge of gas from the melting zone, while the argon gas creates an inert atmosphere, reducing the bubble formation rate. At the same time, the negative pressure promotes the diffusion and fusion of quartz molecules, which, combined with the high-temperature melting of the heating coil, increases the fusion rate, meeting the requirements of high-precision fiber optic splicing and making it suitable for mass production. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the thermal fusion bonding device of this utility model;

[0017] Figure 2 This is a utility model Figure 1 Enlarged schematic diagram of the structure at point A;

[0018] Figure 3This is a schematic diagram of the connection structure between the connecting pipe and the sealing pipe of this utility model;

[0019] Figure 4 This is a schematic diagram of the connecting pipe structure of this utility model;

[0020] In the diagram: 1. High-frequency heating box; 2. Crucible; 3. Heating coil; 4. Tooling fixture; 5. Vacuum pump; 6. Argon protective gas circuit box; 7. Infrared thermometer; 8. Base; 9. Damping shaft; 10. Connecting rod; 11. Arc groove; 12. Groove; 13. Pipe fitting; 130. Pipe 1; 131. Pipe 2; 132. Flow controller; 14. Sealing pipe; 15. Connecting pipe. 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] Please see Figures 1-4 The present invention provides a technical solution: a quartz optical fiber thermal fusion bundling device, comprising a high-frequency heating box 1, a crucible 2, a heating coil 3, a vacuum pump 5, an infrared thermometer 7, and an argon protective gas circuit box 6. The crucible 2 is installed on the high-frequency heating box 1, and the heating coil 3 is provided on the crucible 2. The high-frequency heating box 1 is connected to the argon protective gas circuit box 6. The infrared thermometer 7 is installed on the high-frequency heating box 1 through an installation mechanism. The vacuum pump 5 is located on one side of the high-frequency heating box 1.

[0023] In use, first insert the upper end of the quartz wire into the sealing tube 14, and the lower end of the quartz wire through and into the connecting tube 15. Insert the upper end of the connecting tube 15 into the bottom end of the sealing tube 14 and fix it. Install the connecting tube 15 into the tooling fixture 4, and insert the bottom end of the quartz wire into the cured quartz tube. Then, place the area to be fused between the quartz tube and the quartz wire in the center of the crucible 2. At this time, both the lower end of the connecting tube 15 and the quartz tube are inserted into the crucible 2. Start the vacuum pump 5 to extract the gas in the high-frequency heating chamber 1, so that a negative pressure environment is formed in the high-frequency heating chamber 1. At the same time, argon gas is supplied to the high-frequency heating chamber 1 through the argon gas protection gas box 6 and the fitting 13. The flow controller 132 controls the supply flow of argon gas, so that a stable inert atmosphere is formed in the high-frequency heating chamber 1. The high-frequency heating chamber 1 and heating coil 3 are activated. The heating coil 3 heats the crucible 2, thereby thermally fusing the quartz optical fibers. The infrared thermometer 7 is adjusted to a suitable monitoring angle through the mounting mechanism to monitor the temperature inside the crucible 2 in real time and transmits the temperature signal to the high-frequency heating chamber 1 via wireless signal. The high-frequency heating chamber 1 adjusts the heating power according to the received temperature signal to control the heating temperature of the crucible 2 by the heating coil 3, forming a closed-loop feedback to ensure the stability of the fusion temperature. Under the synergistic effect of negative pressure and argon protection, the gas in the melting zone is accelerated to reduce the generation of bubbles, while promoting the diffusion and fusion of quartz molecules. Combined with the high-temperature melting of the heating coil 3, the fusion rate is improved, thereby achieving high-precision quartz optical fiber fusion.

[0024] A groove 12 is provided on the upper wall of the high-frequency heating box 1, and the crucible 2 is installed in the center of the groove 12.

[0025] Heating coil 3 is sleeved on the outer wall of crucible 2 and fixedly connected to crucible 2. Heating coil 3 is electrically connected to controller in high frequency heating box 1 through first wire. Tooling fixture 4 is provided above crucible 2. Heating coil 3 is sleeved on the outer wall of crucible 2, which can heat crucible 2 evenly and ensure that the quartz optical fiber in crucible 2 is heated evenly.

[0026] The infrared thermometer 7 and the controller configured inside the high-frequency heating box 1 are connected wirelessly. The two transmit data through wireless signals. The infrared thermometer 7 transmits the detected temperature signal to the controller. The controller adjusts the working state of the high-frequency heating box 1 according to the temperature signal. The infrared thermometer 7 is used to monitor the temperature of the welding zone in real time and feeds the temperature data back to the high-frequency heating box 1 to adjust the heating parameters, forming a closed-loop feedback control of the heating temperature of the heating coil 3, thereby responding to temperature fluctuations within ±5℃ in real time and ensuring the stability of the welding temperature.

[0027] The high-frequency heating chamber 1 is connected to the vacuum pump 5, which is used to extract the gas in the high-frequency heating chamber 1, through a connecting pipe 15. The connecting pipe 15 is clamped on the tooling fixture 4, the lower end of the connecting pipe 15 is inserted into the crucible 2, and the upper end of the connecting pipe 15 is connected to a sealing pipe 14. The vacuum pump 5 can extract the gas in the high-frequency heating chamber 1, so that a negative pressure environment is formed in the high-frequency heating chamber 1. The vacuum pump 5 is set to apply negative pressure synchronously during the welding stage, assist in the discharge of air bubbles in the welding area, promote the diffusion and fusion of quartz molecules, and improve the fusion rate.

[0028] The mounting mechanism includes a base 8, a damping shaft 9, and a connecting rod 10. The base 8 is fixedly mounted on the upper end of the high-frequency heating box 1 by fastening bolts. The damping shaft 9 is fixedly connected to the upper end of the base 8. The connecting rod 10 is rotatably connected to the upper end of the damping shaft 9. An arc-shaped groove 11 is provided at the end of the connecting rod 10 away from the damping shaft 9. The infrared thermometer 7 is fixedly installed in the arc-shaped groove 11. The setting of the damping shaft 9 allows the position of the infrared thermometer 7 to be rotated when temperature measurement is required, thereby adaptively adjusting the position of the infrared thermometer 7.

[0029] A pipe fitting 13 is fixedly connected to one side of the high-frequency heating box 1. The end of the pipe fitting 13 away from the high-frequency heating box 1 is connected to the argon protective gas circuit box 6. The argon protective gas circuit box 6 supplies argon gas into the high-frequency heating box 1 through the pipe fitting 13, which can form an inert atmosphere in the high-frequency heating box 1 to prevent the quartz optical fiber from being oxidized during the fusion splicing process. At the same time, it provides continuous protection during the cooling stage to avoid cracks caused by sudden cooling.

[0030] The fitting 13 includes pipe 130, pipe 2 131, and flow controller 132. Pipe 1 130 is connected to one side of the argon protective gas circuit box 6. The side of pipe 1 130 away from the argon protective gas circuit box 6 is connected to the inlet of flow controller 132. The outlet of flow controller 132 is connected to pipe 2 131. The end of pipe 2 131 away from flow controller 132 is connected to high-frequency heating box 1. Flow controller 132 is electrically connected to argon protective gas circuit box 6 through a second wire. Flow controller 132 is preferably a mass flow controller. The flow controller 132 can adjust the argon flow rate entering high-frequency heating box 1, adjust the argon supply according to the welding requirements, ensure the stability of the inert atmosphere in high-frequency heating box 1, and avoid argon waste.

[0031] To further enhance understanding of how this device is used, based on its working principle, the following section describes its specific usage in practical application scenarios:

[0032] S1, Pre-treatment of the quartz tube;

[0033] The quartz tube is cut using a diamond cutter or laser cutter. After cutting, the quartz wire is soaked in a 99.6% sulfuric acid solution for 5-10 minutes. The soaked quartz wire is then rinsed with deionized water. After rinsing with deionized water, it is ultrasonically cleaned with anhydrous ethanol in an ultrasonic cleaning tank for 10 minutes. Finally, the quartz wire is dried in an 80℃ oven for 2 hours.

[0034] The alumina-based inorganic adhesive is evenly applied to the cut end face of the dried quartz tube. The thickness of the alumina-based inorganic adhesive layer is 0.1-0.2mm. The alumina-based inorganic adhesive is cured by heating in a three-wave oven for 10 hours. The specific heating method in the three-wave oven is to first heat at 30℃ for 2 hours, then heat at 50℃ for 3 hours, and finally heat at 85℃ for 5 hours to complete the curing process.

[0035] S2, assembling the quartz tube and quartz wire;

[0036] Insert the quartz wire into the sealing tube 14, with the lower end of the quartz wire inserted through the connecting tube 15. Insert the upper end of the connecting tube 15 into the bottom end of the sealing tube 14. Then, wrap the sealing tube 14 with polytetrafluoroethylene (PTFE) PTFE tape four times to fix the connecting tube 15 inside the sealing tube 14 without loosening, while ensuring that the PTFE tape is flat and wrinkle-free. Then, install the connecting tube 15 into the tooling fixture 4, insert the bottom end of the quartz wire into the cured quartz tube, and then place the fusion zone of the quartz tube and quartz wire at the center inside the crucible 2. Adjust the concentricity of the quartz tube and quartz wire using an optical calibrator and tooling fixture 4. Ensure that the concentricity deviation of the quartz tube and quartz wire is less than 0.015 mm by using tooling fixture 4 and optical calibrator together.

[0037] S3, the assembled quartz tube and quartz wire are fused together in a high-frequency heating box 1;

[0038] The crucible 2 is heated to around 1300℃ with fluctuations controlled within 10℃ by the heating coil 3 and held for 15 minutes. Then the temperature of the heating coil 3 is reduced to 1000℃ and held for three minutes. Simultaneously, a negative pressure of 0.065MPa is applied to the high-frequency heating box 1 by the vacuum pump 5, and 0.5-1.0L of argon gas is supplied to the high-frequency heating box 1 every minute by the argon gas protection gas box 6 to form a stable inert atmosphere in the high-frequency heating box 1, thus completing the fusion bonding of the quartz optical fiber assembly.

[0039] S4, post-processing of the fused and bundled quartz optical fiber;

[0040] After the fusion splicing is completed, the silica fiber optic assembly is kept under negative pressure and argon protection for 30-60 minutes until it cools naturally to room temperature. Then, the fusion splice area of ​​the silica fiber optic assembly is inspected with a microscope to ensure that the fusion rate of the fusion splice area of ​​the silica fiber optic assembly is ≥99%, and the fusion loss is ≤0.05dB with an optical fiber loss tester.

[0041] Finally, it should be noted that: all parts not covered in this utility model are the same as or can be implemented using existing technology. The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fused silica optical fiber heat beam fusing apparatus characterized by: The device includes a high-frequency heating box (1), a crucible (2), a heating coil (3), a vacuum pump (5), an infrared thermometer (7), and an argon protective gas circuit box (6). The crucible (2) is installed on the high-frequency heating box (1), and the heating coil (3) is provided on the crucible (2). The high-frequency heating box (1) is connected to the argon protective gas circuit box (6). The infrared thermometer (7) is installed on the high-frequency heating box (1) through a mounting mechanism. The vacuum pump (5) is located on one side of the high-frequency heating box (1).

2. A quartz optical fiber hot fusion splicing apparatus according to claim 1, wherein: The high-frequency heating box (1) has a groove (12) on its upper wall, and the crucible (2) is installed in the center of the groove (12).

3. A quartz optical fiber hot fusion splicing apparatus according to claim 2, wherein: The heating coil (3) is sleeved on the outer wall of the crucible (2) and fixedly connected to the crucible (2). The heating coil (3) is electrically connected to the controller in the high-frequency heating box (1) through the first wire. A tooling fixture (4) is provided above the crucible (2).

4. A quartz optical fiber hot fusion splicing apparatus according to claim 3, wherein: The infrared thermometer (7) is connected to the controller inside the high-frequency heating box (1) via a wireless signal.

5. A quartz optical fiber hot fusion splicing apparatus according to claim 4, wherein: The high-frequency heating box (1) is connected to the vacuum pump (5) used to extract gas from the high-frequency heating box (1) via a connecting pipe (15). The connecting pipe (15) is clamped on the tooling fixture (4). The lower end of the connecting pipe (15) is inserted into the crucible (2), and the upper end of the connecting pipe (15) is connected to a sealing pipe (14).

6. A quartz optical fiber hot fusion splicing apparatus according to claim 5, wherein: The installation mechanism includes a base (8), a damping shaft (9), and a connecting rod (10). The base (8) is fixedly installed on the upper end of the high-frequency heating box (1) by fastening bolts. The damping shaft (9) is fixedly connected to the upper end of the base (8). The connecting rod (10) is rotatably connected to the upper end of the damping shaft (9). An arc groove (11) is provided at the end of the connecting rod (10) away from the damping shaft (9). The infrared thermometer (7) is fixedly installed in the arc groove (11).

7. The quartz optical fiber thermal fusion bundling device according to claim 6, characterized in that: A pipe fitting (13) is fixedly connected to one side of the high-frequency heating box (1), and the end of the pipe fitting (13) away from the high-frequency heating box (1) is connected to the argon protective gas circuit box (6).

8. A quartz optical fiber hot fusion splicing apparatus according to claim 7, wherein: The fitting (13) includes pipe one (130), pipe two (131) and flow controller (132). One side of the argon protective gas circuit box (6) is connected to pipe one (130). The side of pipe one (130) away from the argon protective gas circuit box (6) is connected to the inlet end of the flow controller (132). The outlet end of the flow controller (132) is connected to pipe two (131). The end of pipe two (131) away from the flow controller (132) is connected to the high-frequency heating box (1). The flow controller (132) is electrically connected to the argon protective gas circuit box (6) through a second wire.

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