Production system of high-strength fatigue-resistant optical fiber

Abstract

The invention provides a high-strength fatigue-resistant optical fiber production system which comprises a heating furnace body, a first gas unit, a second gas unit and a carbon coating unit which are sequentially connected from top to bottom, the middle of the first gas unit is provided with a first fiber feeding channel, and the second gas unit is correspondingly provided with a second fiber feeding channel. A wire outlet of the heating furnace main body, the first fiber feeding channel, the second fiber feeding channel and a wire inlet of the carbon coating unit are sequentially communicated from top to bottom; the first gas unit is filled with argon; and the second gas unit is filled with mixed gas of chlorine and inert gas. According to the production system of the high-strength fatigue-resistant optical fiber provided by the invention, after the heating furnace main body performs wire drawing, the optical fiber directly enters the argon environment, enters the second gas unit containing the mixed gas from the argon environment, and then directly enters the carbon coating equipment from the second gas unit, so that the periphery of the optical fiber cannot be polluted by hydroxyl in air.

Description

Technical Field

[0001] The invention belongs to the technical field of optical fiber manufacturing, and in particular relates to a production system for high-strength fatigue-resistant optical fibers. Background Art

[0002] Optical fiber is a fiber made of quartz glass and used as a light transmission tool. When optical fiber works in a high humidity and high hydrogen environment for a long time, it is easy to reduce the strength of the optical fiber and increase the loss of the optical fiber, causing the optical fiber to fail. Carbon coating has become the first choice for sealed coated optical fiber due to its high water resistance and hydrogen resistance. Carbon coated optical fiber, also known as carbon coated optical fiber, is a method of protecting the optical fiber by depositing a sealed carbon layer during the drawing process. It has high fatigue resistance and is therefore widely used in special environments such as optical fiber hydrophones.

[0003] However, during the drawing process of the carbon-coated optical fiber, after it comes out of the heating furnace main body, the bare optical fiber will be briefly exposed to the air, and under high temperature conditions, water vapor (hydroxyl) in the surrounding environment may enter the interior of the bare optical fiber, causing the surface of the bare optical fiber to be contaminated by hydroxyl before carbon coating, or part of the water vapor in the environment is sealed inside the carbon coating, resulting in a decrease in the quality of the carbon-coated optical fiber, which will seriously affect the fatigue resistance factor of the optical fiber and cause a decrease in the long-term reliability of the optical fiber. Summary of the invention

[0004] The embodiment of the present invention provides a production system for high-strength fatigue-resistant optical fiber, aiming to solve the technical problem in the prior art that bare optical fiber is exposed before carbon coating, resulting in low carbon coating quality and affecting the fatigue resistance factor.

[0005] To achieve the above object, the technical solution adopted by the present invention is: Provided is a production system for high-strength fatigue-resistant optical fiber, comprising a heating furnace main body, a first gas unit, a second gas unit and a carbon coating unit connected in sequence from top to bottom, wherein the first gas unit has a first fiber feeding channel in the middle, and the second gas unit is correspondingly provided with a second fiber feeding channel, and the fiber outlet of the heating furnace main body, the first fiber feeding channel, the second fiber feeding channel and the fiber inlet of the carbon coating unit are connected in sequence from top to bottom; The first gas unit is filled with argon gas; the second gas unit is filled with a mixed gas of chlorine gas and inert gas.

[0006] In a possible implementation, the first gas unit includes a gas filling box, which is provided with an argon inlet and an argon outlet, a protective space for containing argon is formed inside the gas filling box, and the first fiber feeding channel is opened in the gas filling box along the up and down directions.

[0007] In a possible implementation, the second gas unit includes: The shell is divided into a mixing chamber and a protection chamber, the mixing chamber and the protection chamber are connected to each other, the shell is provided with a first air inlet and a second air inlet on the side corresponding to the mixing chamber, the shell is provided with a mixed gas outlet on the side corresponding to the protection chamber, the protection chamber is provided with a connecting pipe which passes through from top to bottom, the second fiber delivery channel is formed in the connecting pipe, and a plurality of air holes are opened on the outer periphery of the connecting pipe; a chlorine gas supply device, whose gas outlet is connected to the first gas inlet; and an inert gas supply device, whose gas outlet is connected to the second gas inlet.

[0008] In a possible implementation, the second gas unit further includes a processing device, the processing device is used to remove chlorine, and the processing device is connected to the mixed gas outlet.

[0009] In a possible implementation, a stirring component is provided in the mixing chamber, and the stirring component includes: A driving member, disposed at the bottom of the mixing chamber, wherein the driving member has a rotation axis parallel to the up-down direction; A vertically arranged driven rod has its bottom coaxially connected to the rotating shaft; and a driving blade is arranged around the top periphery of the driven rod.

[0010] In a possible implementation, a pressure regulator is provided on the pipeline between the inert gas supply device and the mixing chamber, and a pressure sensor is provided at the outlet end of the mixed gas outlet. The pressure sensor is communicatively connected to the pressure regulator to control the intake pressure of the inert gas.

[0011] In a possible implementation, a plurality of guide plates staggered up and down are provided in the protection chamber, and the plurality of guide plates cooperate to form a serpentine mixed gas flow path.

[0012] In a possible implementation, the high-strength fatigue-resistant optical fiber production system further includes two sets of monitoring components, which are respectively arranged on both sides of the second gas unit, and the monitoring components are used to monitor the chlorine gas outside the shell.

[0013] In a possible implementation, air curtain sealing assemblies are respectively provided at the upper and lower ends of the second fiber feeding channel, the air curtain sealing assembly located at the top of the second fiber feeding channel is connected to the first gas unit, and the air curtain sealing assembly is filled with argon gas.

[0014] In a possible implementation, a heating assembly is further provided in the protection chamber, and the heating assembly includes a plurality of heating elements. The plurality of heating elements are enclosed to form a cylindrical structure, and the cylindrical structure is coaxially sleeved on the outer circumference of the connecting pipe. The heating elements are used to heat the connecting pipe.

[0015] Compared with the prior art, the production system of high-strength fatigue-resistant optical fiber provided by the present invention provides two protective environments. After the heating furnace main body is drawn, the optical fiber directly enters the argon environment, enters the second gas unit containing the mixed gas from the argon environment, and then directly enters the carbon coating equipment from the second gas unit. During the whole process, it does not come into contact with the external environment. The periphery of the optical fiber will not be contaminated by hydroxyl groups in the air, and there will be no hydroxyl impurities in the optical fiber after carbon coating, thereby improving the carbon coating quality of the optical fiber, the fatigue resistance factor of the optical fiber is high, the reliability of the carbon-coated optical fiber is improved, and the service life of the carbon-coated optical fiber is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of the main structure of a production system for high-strength fatigue-resistant optical fibers provided by one embodiment of the present invention; Figure 2 A schematic diagram of the structure of the second gas unit used in one embodiment of the present invention Figure 1 ; Figure 3 A schematic diagram of the structure of the second gas unit used in one embodiment of the present invention Figure 2 ; Figure 4 for Figure 2 A cross-sectional view of a second gas unit used in; Figure 5 for Figure 2 A second gas unit and air curtain seal assembly used in; Figure 6 A cross-sectional view of a second gas unit used in yet another embodiment of the present invention.

[0018] Description of reference numerals: 1. Heating furnace body; 2. First gas unit; 21. Inflatable box; 22. Argon gas inlet; 23. Argon gas outlet; 24. First fiber feeding channel; 3. Second gas unit; 31. Shell; 311. First air inlet; 312. Second air inlet; 313. Mixed gas outlet; 314. Connecting pipe; 3141. Second fiber delivery channel; 3142. Air vent; 32. Chlorine supply device; 33. Inert gas supply device; 34. Processing device; 35. Pressure regulator; 36. Pressure sensor; 37. Heating assembly; 371. Heating element; 38. Guide plate; 4. Carbon coating unit; 5. Monitoring components; 6. Air curtain sealing assembly. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention 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 present invention and are not intended to limit the present invention.

[0020] It should be noted that the directions or positional relationships indicated by terms such as “length”, “width”, “height”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “head” and “tail” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the invention.

[0021] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] 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 one or more of the features. In addition, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0023] Please also read Figures 1 to 6, the production system of high-strength fatigue-resistant optical fiber provided by the present invention is now described. A production system of high-strength fatigue-resistant optical fiber includes a heating furnace body 1, a first gas unit 2, a second gas unit 3 and a carbon coating unit 4 connected in sequence from top to bottom, the first gas unit 2 has a first fiber delivery channel 24 in the middle, and the second gas unit 3 is correspondingly provided with a second fiber delivery channel 3141, the fiber outlet of the heating furnace body 1, the first fiber delivery channel 24, the second fiber delivery channel 3141 and the fiber inlet of the carbon coating unit 4 are connected in sequence from top to bottom; the first gas unit 2 is filled with argon; the second gas unit 3 is filled with a mixed gas of chlorine and inert gas.

[0024] It should be noted that the argon gas forms a protective environment at the drawing port of the heating furnace body 1, preventing external oxygen from entering the heating furnace body 1 from the drawing port, and preventing oxygen from oxidizing the graphite in the heating furnace body 1 into carbon dioxide. The argon gas can also enter the heating furnace body 1 to provide a protective environment to prevent external oxygen from contacting the graphite.

[0025] It should be noted that the loss in optical fiber is mainly caused by OH- anions, transition metal ions and rare earth metal ions. Since light scattering and light absorption are mainly caused by OH-, OH- ions in the optical fiber must be removed. Chlorine can effectively remove OH- ions.

[0026] It should be noted that when the volume fraction of hydrogen in chlorine is more than 5%, there may be a risk of explosion when exposed to strong light. Therefore, chlorine is mixed with inert gas, and inert gas does not contain hydrogen, which improves the safety of chlorine. In order not to affect the effect of chlorine, inert gas accounts for 95% to 96% of the total mixed gas.

[0027] During specific implementation, the first gas unit 2 is disposed below the heating furnace body 1 to isolate oxygen from entering the interior of the heating furnace body 1 .

[0028] Compared with the prior art, the production system of high-strength fatigue-resistant optical fiber provided in this embodiment provides two protective environments. After the heating furnace main body 1 is drawn, the optical fiber directly enters the argon environment, enters the second gas unit 3 containing the mixed gas from the argon environment, and then directly enters the carbon coating equipment from the second gas unit 3. During the whole process, there is no contact with the external environment. The periphery of the optical fiber will not be contaminated by hydroxyl groups in the air, and there will be no hydroxyl impurities in the optical fiber after carbon coating, which improves the carbon coating quality of the optical fiber, the fatigue resistance factor of the optical fiber is high, the reliability of the use of the carbon-coated optical fiber is improved, and the service life of the carbon-coated optical fiber is extended.

[0029] In some embodiments, see Figure 1The first gas unit 2 includes a gas filling box 21, which is provided with an argon inlet 22 and an argon outlet 23. A protective space for containing argon is formed inside the gas filling box 21, and a first fiber feeding channel 24 is opened in the up-down direction of the gas filling box 21. The gas filling box 21 provides a protective space. After the argon enters from the argon inlet 22, it quickly fills the entire chamber to form a protective environment at the drawing port of the heating furnace body 1, isolating the optical fiber from the external environment and preventing the optical fiber from being contaminated by hydroxyl groups in the air. The setting of the argon outlet 23 allows the argon in the gas filling box 21 to flow to form a gas cycle, thereby improving the isolation effect of the argon.

[0030] In some embodiments, see Figures 3 to 5 The second gas unit 3 includes a shell 31, a chlorine gas supply device 32 and an inert gas supply device 33. The shell 31 is divided into a mixing chamber and a protection chamber, and the mixing chamber and the protection chamber are connected to each other. The shell 31 is provided with a first air inlet 311 and a second air inlet 312 on the side corresponding to the mixing chamber, and a mixed gas outlet 313 is provided on the side corresponding to the protection chamber. A connecting pipe 314 is provided in the protection chamber, and a second fiber delivery channel 3141 is formed in the connecting pipe 314. A plurality of air holes 3142 are provided on the outer periphery of the connecting pipe 314. The gas outlet end of the chlorine gas supply device 32 is connected to the first gas inlet 311; and the gas outlet end of the inert gas supply device 33 is connected to the second gas inlet 312.

[0031] In a specific implementation, the chlorine supply device 32 can be a chlorine supply machine or a chlorinating machine.

[0032] In a specific implementation, the inert gas supply device 33 may be an inert gas booster or an inert gas generator.

[0033] It should be noted that the gas entering the protection chamber is a uniformly mixed gas with a uniform flow rate, which will not cause the optical fiber to shake and affect the drawing quality.

[0034] In specific implementation, the shell 31 is a rectangular structure, and two partition plates are provided in the shell 31. The partition plates cooperate with the sides of the shell 31 to divide the interior of the shell 31 into two parts, namely a mixing chamber and a protection chamber. The mixing chamber is also a rectangular structure. The plate surfaces of the two partition plates are respectively provided with air holes to connect the mixing chamber and the protection chamber. The mixing chamber 312 directly transports the mixed gas to the protection chamber; the first air inlet 311 and the second air inlet 312 are arranged on the same side of the shell 1 to enable uniform mixing in the mixing chamber.

[0035] The second gas unit 3 provided in this embodiment can protect the optical fiber. Chlorine and inert gas are mixed in the mixing chamber. After being fully mixed, they are diffused into the protection chamber to protect the optical fiber and isolate the hydroxyl groups in the air. When the optical fiber enters the carbon coating unit 4, it is isolated from the hydroxyl groups, thereby improving the molding quality of the carbon-coated optical fiber and ensuring the fatigue resistance reliability of the carbon-coated optical fiber. The chlorine supply device 32 and the inert gas supply device 33 respectively continuously and stably attack the mixing chamber with chlorine and inert gas to ensure that the mixed gas in the protection chamber is evenly distributed. The mixed gas can enter the second fiber delivery channel 3141 from the air vent 3142 to protect the optical fiber.

[0036] In some embodiments, see Figure 4 The second gas unit 3 further includes a processing device 34, which is used to remove chlorine gas, and the processing device 34 is connected to the mixed gas outlet 313. The processing device 34 can process the chlorine gas so that the discharged gas will not cause harm to the human body, thereby protecting the environment and the health of workers.

[0037] In specific implementation, the treatment equipment 34 is an acid treatment equipment, and a sodium hydroxide solution is provided in the treatment equipment 34. The sodium hydroxide solution can react with chlorine gas to convert the chloride ions in the chlorine gas into sodium chloride and sodium hypochlorite, thereby preventing the chlorine gas from being exhausted into the air. The treatment equipment 34 can protect the work safety of the staff.

[0038] In some embodiments, a stirring assembly (not shown) is provided in the mixing chamber, and the stirring assembly includes a driving member, a vertically arranged driven rod, and a driving blade. The driving member is provided at the bottom of the mixing chamber, and the driving member has a rotating shaft parallel to the up and down direction; the bottom of the vertically arranged driven rod is coaxially connected to the rotating shaft; the driving blade is arranged around the top periphery of the driven rod. The setting of the stirring assembly accelerates the mixing of chlorine and inert gas after entering the mixing chamber, improves the mixing efficiency, makes the mixed gas entering the protection chamber uniform, performs gas protection on the optical fiber, effectively isolates the air, ensures that the optical fiber is not adhered to by hydroxyl groups in the air before entering the carbon coating unit 4, and improves the production quality of the carbon-coated optical fiber.

[0039] It should be noted that the mixing chamber and the protection chamber are located on the same horizontal plane, and the driving member is arranged at the bottom of the mixing chamber.

[0040] Optionally, the driving member is a motor having a self-rotating output shaft, which drives the driven rod to rotate, and the driven rod 351 drives the driving blade to rotate, and the blade surface of the driving blade is perpendicular to the horizontal direction, which quickly drives the chlorine and inert gas to mix and improve the mixing efficiency.

[0041] It should be noted that the outer surfaces of the driving blade and the driven rod are coated with corrosion-resistant materials to avoid the corrosion effect of chlorine and extend the service life of the driving blade and the driven rod. Alternatively, the driving blade and the driven rod are made of corrosion-resistant materials, such as stainless steel.

[0042] In some embodiments, see Figure 4 A pressure regulator 35 is provided on the pipeline between the inert gas supply device 33 and the mixing chamber, and a pressure sensor 36 is provided at the outlet end of the mixed gas outlet 313. The pressure sensor 36 is communicatively connected with the pressure regulator 35 to control the inlet pressure of the inert gas. The pressure regulator 35 can compensate the pressure in the protection chamber according to the feedback of the pressure sensor 36, and ensure that the mixed gas outlet 313 is always under positive pressure, so as to prevent the gas from entering the protection chamber from the mixed gas outlet 313 and affecting the internal gas environment.

[0043] In specific implementation, the pressure regulator 35 has an inlet pipe, a main body and an outlet pipe which are connected in sequence. The inlet pipe is connected to the inert gas supply device 33, and the outlet pipe is connected to the first air inlet 311. The pressure regulator 35 adjusts the outlet flow rate of the outlet pipe according to the data measured by the pressure sensor 36, so that the mixed gas always fills the protection chamber, thereby ensuring the discharge stability of the mixed gas.

[0044] In some embodiments, see Figure 6 The protection chamber is provided with a plurality of guide plates 38 arranged in an up-and-down staggered manner, and the plurality of guide plates 38 cooperate to form a serpentine mixed gas flow path. The setting of the guide plates 38 can prolong the residence time of the mixed gas in the protection chamber. After the mixed gas encounters the guide plates 38, the direction will change, and the flow time will be prolonged; at the same time, the guide plates 38 can guide the movement of the mixed gas, and guide the mixed gas to various positions in the protection chamber, so as to ensure the uniformity and stability of the mixed gas in the protection chamber.

[0045] In a specific implementation, a plurality of guide plates 38 are staggered up and down along the same horizontal direction, and the mixed gas gradually fills the protection chamber along a tortuous serpentine path. Figure 6 , turning the protection room into a protective environment, isolating the optical fiber surface from the air, and protecting the optical fiber surface clean.

[0046] In some embodiments, see Figure 1 The high-strength fatigue-resistant optical fiber production system also includes two sets of monitoring components 5, which are respectively arranged on both sides of the second gas unit 3. The monitoring components 5 are used to monitor the chlorine outside the shell 31. Chlorine is toxic and mainly invades the human body through the respiratory tract and dissolves in the moisture contained in the mucous membrane, which can cause damage to the upper respiratory tract mucosa. The monitoring components 5 are arranged on both sides of the second gas unit 3 to monitor whether chlorine is leaking, which can protect the work safety of workers and reduce potential threats to work.

[0047] As an implementation of the monitoring component 5, the monitoring component 5 includes a sensing module, a processor module and a warning light, wherein the sensing module is conductively connected to the processing module, and the warning light is conductively connected to the processing module. The sensing module includes a chlorine gas sensor, which can detect the concentration of chlorine gas and send the sensed data to the processor module, and the processor module controls the warning light to light up according to the data, warning the staff to evacuate the work area.

[0048] In some embodiments, see Figure 5 The upper and lower ends of the second fiber feeding channel 3141 are respectively provided with air curtain sealing components 6. The air curtain sealing component 6 located at the top of the second fiber feeding channel 3141 is connected to the first gas unit 2, and the air curtain sealing component 6 is filled with argon gas. The air curtain sealing component 6 can form a seal at the upper and lower ends of the connecting tube 316 to prevent the mixed gas from leaking from the gap between the connecting tube 314 and the optical fiber, thereby improving the sealing performance of the second gas unit 3. The air curtain sealing component 6 located at the top of the connecting tube 314 can prevent the mixed gas from entering the heating furnace body 1 upward from the connecting tube 314, affecting the normal operation of the heating furnace body 1. The air curtain sealing component 6 located at the bottom of the connecting tube 314 can prevent the mixed gas from entering the carbon coating unit 4 downward from the connecting tube 314, affecting the carbon coating work of the carbon coating unit 4.

[0049] In a specific implementation, two air curtain sealing assemblies 6 are respectively disposed at the upper and lower ends of the housing 31 from top to bottom.

[0050] In some embodiments, the air curtain sealing assembly 6 includes a sealing shell and an inflation tube. The sealing shell is arranged on the surface of the shell 31 and is connected to the connecting tube 314. The inflation tube is connected to the gas source to fill nitrogen into the sealing shell. Argon is an inert gas and will not react with chlorine. After the sealing shell is filled with argon, a gas protection layer is formed at the port of the connecting tube 314 to prevent chlorine from passing through the gas protection layer, so as to improve the sealing effect of the protection chamber.

[0051] In some embodiments, see Figure 4 and Figure 5 A heating assembly 37 is also provided in the protection chamber. The heating assembly 37 includes a plurality of heating elements 371. The plurality of heating elements 371 are enclosed to form a cylindrical structure. The cylindrical structure is coaxially sleeved on the outer periphery of the connecting tube 314. The heating elements 371 are used to heat the connecting tube 314. The heating assembly 37 can provide a high temperature environment to heat the connecting tube 314, thereby preventing the temperature of the optical fiber from decreasing during the drawing process and affecting the carbon coating step.

[0052] Optionally, the heating element 371 is made of ceramic material, which has good heat preservation effect and will not be corroded by chlorine, thus meeting the use requirements. The ceramic is heated to 1000° C. to ensure that the temperature of the optical fiber passing through the connecting tube 314 does not drop.

[0053] It should be noted that the temperature required for carbon coating of optical fiber is 800~1200℃, and the heating element can be heated to 1000℃ to avoid the temperature of the optical fiber from decreasing.

[0054] 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 production system for high-strength fatigue-resistant optical fiber, characterized in that: It includes a heating furnace body, a first gas unit, a second gas unit and a carbon coating unit connected in sequence from top to bottom, the first gas unit has a first fiber feeding channel in the middle, the second gas unit is correspondingly provided with a second fiber feeding channel, and the wire outlet of the heating furnace body, the first fiber feeding channel, the second fiber feeding channel and the wire inlet of the carbon coating unit are connected in sequence from top to bottom; The first gas unit is filled with argon gas; the second gas unit is filled with a mixed gas of chlorine gas and inert gas.

2. The production system of high-strength fatigue-resistant optical fiber according to claim 1, characterized in that: The first gas unit includes a gas filling box, which is provided with an argon inlet and an argon outlet. A protective space for containing argon is formed inside the gas filling box, and the first fiber feeding channel is opened in the gas filling box along the up and down directions.

3. The production system of high-strength fatigue-resistant optical fiber according to claim 1, characterized in that: The second gas unit comprises: The shell is divided into a mixing chamber and a protection chamber, the mixing chamber and the protection chamber are connected to each other, the shell is provided with a first air inlet and a second air inlet on the side corresponding to the mixing chamber, the shell is provided with a mixed gas outlet on the side corresponding to the protection chamber, the protection chamber is provided with a connecting pipe which passes through from top to bottom, the second fiber delivery channel is formed in the connecting pipe, and a plurality of air holes are opened on the outer periphery of the connecting pipe; a chlorine gas supply device, the gas outlet of which is connected to the first gas inlet; and An inert gas supply device has a gas outlet connected to the second gas inlet.

4. The production system of high-strength fatigue-resistant optical fiber according to claim 3, characterized in that: The second gas unit further includes a processing device, which is used to remove chlorine gas and is communicated with the mixed gas outlet.

5. The production system of high-strength fatigue-resistant optical fiber according to claim 3, characterized in that: The mixing chamber is provided with a stirring assembly, and the stirring assembly comprises: A driving member, disposed at the bottom of the mixing chamber, wherein the driving member has a rotation axis parallel to the up-down direction; A vertically arranged driven rod, the bottom of which is coaxially connected to the rotating shaft; and The driving blade is arranged around the top periphery of the driven rod.

6. The production system of high-strength fatigue-resistant optical fiber according to claim 3, characterized in that: A pressure regulator is provided on the pipeline between the inert gas supply device and the mixing chamber, and a pressure sensor is provided at the outlet end of the mixed gas outlet. The pressure sensor is communicatively connected with the pressure regulator to control the intake pressure of the inert gas.

7. The production system of high-strength fatigue-resistant optical fiber according to claim 3, characterized in that: The protection chamber is provided with a plurality of guide plates which are staggered up and down, and the plurality of guide plates cooperate to form a serpentine mixed gas flow path.

8. The production system of high-strength fatigue-resistant optical fiber according to claim 1, characterized in that: The production system of high-strength fatigue-resistant optical fiber also includes two groups of monitoring components, which are respectively arranged on both sides of the second gas unit, and the monitoring components are used to monitor the chlorine gas outside the shell.

9. The production system of high-strength fatigue-resistant optical fiber according to claim 1, characterized in that: Air curtain sealing components are respectively provided at the upper and lower ends of the second fiber feeding channel. The air curtain sealing component located at the top of the second fiber feeding channel is connected to the first gas unit, and the air curtain sealing component is filled with argon gas.

10. The production system of high-strength fatigue-resistant optical fiber according to claim 3, characterized in that: The protection chamber is also provided with a heating assembly, which includes a plurality of heating elements. The plurality of heating elements are surrounded to form a cylindrical structure, and the cylindrical structure is coaxially sleeved on the outer circumference of the connecting pipe. The heating elements are used to heat the connecting pipe.

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