Optical fiber drawing and curing device

Abstract

The utility model discloses an optical fiber drawing and curing device which comprises a central tube, an optical unit and a heat dissipation unit, the central tube is made of a transparent material, inert gas is filled in the central tube, and an optical fiber penetrates through the central tube along the axial direction of the central tube; the optical unit comprises a light source assembly, a secondary lens and a reflecting plate, the light source assembly is arranged on the outer side of the central tube, the secondary lens is arranged between the central tube and the light source assembly so as to converge ultraviolet light emitted by the light source assembly to an optical fiber, and the reflecting plate is arranged on the outer side of the central tube so as to converge the ultraviolet light emitted by the light source assembly to the optical fiber. And the light source assembly is opposite to the light source assembly. The beneficial effects of the utility model are that: can make ultraviolet light intensified converge on the optical fiber, thereby improving the ultraviolet radiation intensity to the optical fiber under the limited light emitting condition, can carry out heat dissipation to the light source assembly, effectively prevent the light source assembly from aging or damage caused by long-term overheating, and further prolong the service life of the device.

Description

Technical Field

[0001] The utility model relates to the technical field of special optical fiber processing, in particular to an optical fiber drawing and curing device. Background Art

[0002] In recent years, with the development and increasing maturity of 5G technology, ordinary optical fibers can no longer meet the diverse needs of daily communications and industrialization. This has led to the emergence of high-value-added, high-tech specialty optical fibers, which will be increasingly used in industrial intelligent equipment, life and health monitoring, aviation, ocean exploration, and the energy industry. Therefore, the research and development of specialty optical fibers has become a future race track and a bellwether for industry development.

[0003] Fiber coating and curing technology are crucial steps in the optical fiber drawing process. Bare optical fibers are extremely fragile when directly exposed to the outside world. During the fiber production process, they must be coated with a protective coating and then cured. This coating and curing process significantly optimizes the mechanical properties of the optical fiber, strengthens its bending resistance, and thus improves its overall performance. The optical fiber curing process typically utilizes UV curing, using a UV curing oven to cure the protective coating on the outer surface of the optical fiber to form a fiber coating. Poorly cured fiber coatings can result in poor surface finish, stickiness, insufficient curing, and weak resistance to lateral pressure, severely impacting subsequent processes.

[0004] Existing optical fiber drawing and curing devices (such as an optical fiber high-speed drawing UV curing device disclosed in application number 202010499030.7) use LED lamps as UV light sources, and cooperate with reflectors to perform directional surface curing of the optical fiber. It is difficult to highly focus the UV light source, resulting in the UV radiation level of the optical fiber being less than ideal. In addition, increasing the number of LED lamps to increase the UV radiation level can easily cause high power consumption and heat generation problems. The heat dissipation effect of the curing device is poor, which will reduce the service life of the UV light source. Utility Model Content

[0005] The purpose of the present utility model is to overcome the above-mentioned technical deficiencies and propose an optical fiber drawing and curing device to solve the technical problems in the existing technology that the ultraviolet light source cannot be highly focused, resulting in the ultraviolet radiation level of the optical fiber being less than ideal, the dense ultraviolet light source is prone to high power consumption and heat generation, and the curing device has poor heat dissipation effect, which will reduce the service life of the ultraviolet light source.

[0006] To achieve the above technical objectives, the technical solution of the present utility model provides an optical fiber drawing and curing device, comprising:

[0007] A central tube, which is made of a transparent material, contains an inert gas, and is used for the optical fiber to pass through along its axial direction;

[0008] an optical unit comprising a light source assembly, a secondary lens, and a reflector, wherein the light source assembly is disposed outside the central tube, the secondary lens is disposed between the central tube and the light source assembly to focus the ultraviolet light emitted by the light source assembly onto the optical fiber, and the reflector is disposed outside the central tube and opposite to the light source assembly to reflect the ultraviolet light emitted by the light source assembly onto the optical fiber;

[0009] The heat dissipation unit is used to dissipate heat for the light source assembly.

[0010] Furthermore, the central tube includes a tube body and two end covers, both ends of the tube body are opened, and the two end covers are removable fixed covers respectively arranged at the two ends of the tube body. A channel is opened on the two end covers, and the two channels are coaxial with the tube body and connected.

[0011] Furthermore, the optical fiber drawing and curing device further includes an air filling and exhausting unit, which is connected to the central tube and is used to fill the central tube with inert gas and exhaust the waste gas in the central tube.

[0012] Furthermore, an air cavity is provided on each of the two end covers, and the air cavity is an annular structure and is coaxial with the channel. An air port and a plurality of flow holes are also provided on each of the two end covers, and the air port is connected to the air cavity, and one end of each of the flow holes is connected to the air cavity, and the other end of each of the flow holes is connected to the channel. The outlet end of the gas filling and exhaust unit is connected to the upstream gas port for filling inert gas into the central tube, and the inlet end of the gas filling and exhaust unit is connected to the downstream gas port for extracting exhaust gas from the central tube.

[0013] Furthermore, the inflation and exhaust unit includes an inflation component and an exhaust component, the outlet end of the inflation component is connected to the upstream air port, and the inlet end of the exhaust component is connected to the downstream air port.

[0014] Furthermore, the light source assembly includes multiple UVA photon modules, multiple UVB photon modules and multiple UVC photon modules, and each of the UVA photon modules, each of the UVB photon modules and each of the UVC photon modules are arranged along the length direction of the central tube.

[0015] Furthermore, the secondary lens is a columnar structure and is arranged along the length direction of the central tube.

[0016] Furthermore, the reflector is an arc-shaped structure and is arranged along the length direction of the central tube.

[0017] Furthermore, the optical fiber drawing and curing device also includes a shell, which includes a shell body and a shell cover. The shell body has a cavity with an opening on one side, and the shell cover is arranged at the opening of the cavity. The central tube passes through the shell body so that the tube body is placed in the cavity, and the light source assembly, the secondary lens and the reflector are all built into the cavity.

[0018] Furthermore, a plurality of air inlets are provided on two opposite side walls of the shell body, and each of the air inlets is connected to the cavity. A plurality of air outlets are provided on the other side wall of the shell body, and each of the air outlets is connected to the cavity. The heat dissipation unit includes a radiator and a plurality of cooling fans. The radiator is a fin structure and is built into the cavity along the length direction of the central tube. The radiator is detachably fixed to the shell body, and the light source assembly is detachably fixed to the radiator. Each of the cooling fans is built into the cavity at intervals along the length direction of the central tube and is detachably fixed to the shell body. The inlet end of each cooling fan is connected to each air inlet, and the outlet end of each cooling fan is connected to each air outlet.

[0019] Compared with the prior art, the beneficial effects of the present invention include: when in use, the optical fiber coated with coating after drawing is passed through the central tube along the axial direction of the central tube, the secondary lens converges a part of the ultraviolet light emitted by the light source assembly onto the optical fiber, the reflector converges another part of the ultraviolet light emitted by the light source assembly onto the optical fiber and reflects the ultraviolet light after passing through the optical fiber onto the optical fiber, so that the ultraviolet light is enhanced and converged on the optical fiber, thereby improving the ultraviolet irradiation intensity of the optical fiber under limited lighting conditions, and the heat dissipation unit can dissipate heat for the light source assembly, effectively preventing aging or damage of the light source assembly due to long-term overheating, thereby extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of an optical fiber drawing and curing device provided by the utility model;

[0021] Figure 2 This is a front view of an optical fiber drawing and curing device provided by the utility model;

[0022] Figure 3 This is a side view of an optical fiber drawing and curing device provided by the utility model;

[0023] Figure 4 yes Figure 3 A schematic structural diagram of the air flow direction of an optical fiber drawing and curing device;

[0024] Figure 5 This is an exploded view of an optical fiber drawing and curing device provided by the utility model;

[0025] Figure 6 yes Figure 2 A schematic structural diagram of a central tube of an optical fiber drawing and curing device;

[0026] Figure 7 yes Figure 3 A schematic structural diagram of the arrangement relationship of a central tube, an optical unit and a heat sink in an optical fiber drawing and curing device;

[0027] Figure 8 yes Figure 7 A schematic structural diagram of the optical path direction of an optical fiber drawing and curing device;

[0028] Figure 9 This is a structural diagram of a light source assembly of an optical fiber drawing and curing device provided by the utility model;

[0029] In the figure: 1-optical fiber, 100-central tube, 110-tube body, 120-end cover, 121-channel, 122-air cavity, 123-air port, 124-flow hole, 130-sealing ring, 200-optical unit, 210-light source assembly, 211-UVA photon module, 212-UVB photon module, 213-UVC photon module, 220-secondary lens, 230-reflector, 300-heat dissipation unit, 310-heat sink, 320-cooling fan, 400-housing, 410-housing body, 411-cavity, 412-air inlet, 413-air outlet, 420-housing cover, 430-thermal insulation layer, 440-support base, 450-pressing strip, 460-bracket, 470-dustproof net, handle-480. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to 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.

[0031] The utility model provides an optical fiber drawing and curing device, the structure of which is as follows: Figure 1 - Figure 5As shown, it includes a central tube 100, an optical unit 200 and a heat dissipation unit 300. The central tube 100 is made of transparent material, contains an inert gas, and is used for the optical fiber 1 to pass through along its axial direction; the optical unit 200 includes a light source component 210, a secondary lens 220 and a reflector 230. The light source component 210 is arranged on the outside of the central tube 100, and the secondary lens 220 is arranged between the central tube 100 and the light source component 210 to converge the ultraviolet light emitted by the light source component 210 on the optical fiber 1. The reflector 230 is arranged on the outside of the central tube 100 and opposite to the light source component 210 to reflect the ultraviolet light emitted by the light source component 210 on the optical fiber 1; the heat dissipation unit 300 is used to dissipate heat from the light source component 210.

[0032] When in use, the optical fiber 1 coated with coating after drawing is passed through the central tube 100 along the axial direction of the central tube 100, and the secondary lens 220 converges a part of the ultraviolet light emitted by the light source component 210 onto the optical fiber 1, and the reflector 230 reflects another part of the ultraviolet light emitted by the light source component 210 and the ultraviolet light converged on the optical fiber 1 and passing through the optical fiber 1 onto the optical fiber 1, so that the ultraviolet light is enhanced and converged on the optical fiber 1, thereby improving the ultraviolet irradiation intensity of the optical fiber 1 under limited lighting conditions, and the heat dissipation unit 300 can dissipate heat for the light source component 210, effectively preventing the light source component 210 from aging or damage due to long-term overheating, thereby extending the service life of the device.

[0033] As a preferred embodiment, please refer to Figure 2 and Figure 6 The central tube 100 includes a tube body 110 and two end covers 120. Both ends of the tube body 110 are opened. The two end covers 120 are detachably fixed on both ends of the tube body 110. A channel 121 is provided on each of the two end covers 120. Both channels 121 are coaxial with and connected to the tube body 110. The optical fiber 1 extends into the tube body 110 from one of the channels 121 and then extends from the other channel 121.

[0034] As a preferred embodiment, the tube body 110 is made of quartz, which has transparent properties.

[0035] As a preferred embodiment, the optical fiber drawing and curing device further includes an air filling and exhaust unit, which is connected to the central tube 100 and is used to fill the central tube 100 with inert gas and exhaust the waste gas in the central tube 100. Filling the central tube 100 with inert gas can isolate oxygen and facilitate rapid curing of the surface coating of the special optical fiber 1. Since more volatiles will be generated during the curing process of the optical fiber 1, the waste gas in the central tube 100 can be exhausted to recover the inert gas and coating volatiles.

[0036] As a preferred embodiment, please refer to Figure 6 , an air cavity 122 is provided on each of the two end covers 120, and the air cavity 122 is an annular structure and is coaxial with the channel 121. An air port 123 and a plurality of flow holes 124 are also provided on each of the two end covers 120, and the air port 123 is communicated with the air cavity 122, and one end of each of the flow holes 124 is communicated with the air cavity 122, and the other end of each of the flow holes 124 is communicated with the channel 121. The outlet end of the gas charging and exhausting unit is communicated with the upstream gas port 123 for filling the central tube 100 with inert gas, and the inlet end of the gas charging and exhausting unit is connected to the lower The upstream air port 123 is connected to extract the exhaust gas in the central tube 100, and the inert gas enters the upstream air cavity 122 along the upstream air port 123, and then enters the upstream channel 121 along the upstream flow hole 124, and finally enters the tube body 110. The inert gas and paint volatiles enter the downstream channel 121, and then enter the downstream air cavity 122 along the downstream flow hole 124, and finally are discharged along the downstream air port 123. The inert gas flows in the tube body 110 along the moving direction of the optical fiber 1, which can improve the isolation effect against oxygen.

[0037] As a preferred embodiment, the inflation and exhaust unit includes an inflation component and an exhaust component. The outlet end of the inflation component is connected to the upstream air port 123, and the inlet end of the exhaust component is connected to the downstream air port 123. The inflation component and the exhaust component can be selected from commercially available equipment and will not be described in detail in this solution.

[0038] As a preferred embodiment, please refer to Figure 6 The central tube 100 further includes a plurality of sealing rings 130 , each of which is respectively arranged at the connection between the two end covers 120 and the tube body 110 to prevent the inert gas in the tube body 110 from escaping from the gap between the connection between the end covers 120 and the tube body 110 .

[0039] As a preferred embodiment, the diameter of the channel 121 is equal to the diameter of the optical fiber 1. After the optical fiber 1 passes through the two channels 121, the gap between the optical fiber 1 and the channel 121 is smaller, thereby preventing the inert gas in the tube body 110 from escaping from the gap between the optical fiber 1 and the channel 121.

[0040] As a preferred embodiment, please refer to Figure 9 The light source assembly 210 includes a plurality of UVA photon modules 211, a plurality of UVB photon modules 212, and a plurality of UVC photon modules 213. Each of the UVA photon modules 211, each of the UVB photon modules 212, and each of the UVC photon modules 213 are arranged along the length direction of the central tube 100. The light range of the UVA photon module 211 is 360nm-405nm, the light range of the UVB photon module 212 is 295nm-315nm, and the light range of the UVC photon module 213 is 260nm-285nm. A traditional mercury lamp is used as the ultraviolet light source. The lamp has problems such as high energy consumption, preheating required for turning on, and easy generation of ozone. Each of the UVA photon modules 211, each of the UVB photon modules 212, and each of the UVC photon modules 213 can be arranged in an alternating manner or in other arrangements to simulate the multi-band spectrum of a mercury lamp, which can meet the requirement of a special optical fiber 1 having a good degree of coating curing at a drawing speed of 50m / min. The UVA photon module 211, the UVB photon module 212, and the UVC photon module 213 are small in size, light in weight, easy to install and carry in multiple scenarios, and have low energy consumption, can be used immediately after turning on, do not generate ozone, and are environmentally friendly.

[0041] As a preferred embodiment, please refer to Figure 3 and Figure 9 There are multiple light source components 210 and multiple secondary lenses 220. Each secondary lens 220 corresponds to each light source component 210 to converge the ultraviolet light emitted by the corresponding light source component 210 onto the optical fiber 1. By increasing the number of the light source components 210, the ultraviolet irradiation intensity of the optical fiber 1 can be further improved.

[0042] As a preferred embodiment, please refer to Figure 3 and Figure 5 The secondary lens 220 is a columnar structure and is arranged along the length direction of the central tube 100. It can converge a portion of the ultraviolet light emitted by each of the UVA photon modules 211, each of the UVB photon modules 212, and each of the UVC photon modules 213 in the light source assembly 210 onto the optical fiber 1.

[0043] As a preferred embodiment, please refer to Figure 3 and Figure 5The reflector 230 is an arc-shaped structure and is arranged along the length direction of the central tube 100. It can converge another part of the ultraviolet light emitted by each of the UVA photon modules 211, each of the UVB photon modules 212, and each of the UVC photon modules 213 in each of the light source assemblies 210 onto the optical fiber 1 and reflect the ultraviolet light after passing through the optical fiber 1 onto the optical fiber 1.

[0044] As a preferred embodiment, please refer to Figure 3 and Figure 5 The optical fiber drawing and curing device also includes a shell 400, which includes a shell body 410 and a shell cover 420. The shell body 410 has a cavity 411 with an opening on one side, and the shell cover 420 is covered at the opening of the cavity 411. The central tube 100 passes through the shell body 410 so that the tube body 110 is built into the cavity 411. The light source assembly 210, the secondary lens 220 and the reflector 230 are all built into the cavity 411. Both ends of the secondary lens 220 are detachably fixed to the shell body 410. The shell 400 is used to support the central tube 100, and the cavity 411 is used to accommodate the tube body 110, the light source assembly 210, the secondary lens 220 and the reflector 230.

[0045] As a preferred embodiment, please refer to Figure 3 and Figure 5 The shell 400 also includes a heat insulation layer 430, a plurality of support seats 440 and two pressure strips 450. The heat insulation layer 430 is built into the cavity 411 and fixed on the shell cover 420. Each of the support seats 440 is built into the cavity 411 and fixed on the heat insulation layer 430 at intervals along the length direction of the central tube 100. The reflector 230 is placed on each of the support seats 440. The two pressure strips 450 are built into the cavity 411 and are relatively arranged on both sides of the reflector 230 along the length direction of the central tube 100. One side of the two pressure strips 450 presses the reflector 230, and the other side of the two pressure strips 450 is detachably fixed to each of the support seats 440. The pressure strips 450 are used to fix the reflector 230 to prevent it from falling.

[0046] As a preferred embodiment, please refer to Figure 3 and Figure 5, a plurality of air inlets 412 are provided on two opposite side walls of the shell body 410, and each of the air inlets 412 is communicated with the cavity 411, and a plurality of air outlet holes 413 are provided on the other side wall of the shell body 410, and each of the air outlet holes 413 is communicated with the cavity 411, the heat dissipation unit 300 includes a radiator 310 and a plurality of cooling fans 320, the radiator 310 is a fin structure, and is built into the cavity 411 along the length direction of the central tube 100, the radiator 310 is detachably fixed to the shell body 410, the light source assembly 210 is detachably fixed to the radiator 310, and each of the cooling fans 320 is spaced apart and built into the cavity 411 along the length direction of the central tube 100, and is detachably fixed to the shell body 410, and the inlet end of each cooling fan 320 is It is connected to each of the air inlets 412, and the outlet ends of each of the cooling fans 320 are connected to each of the air outlet holes 413. The radiator 310 directly dissipates heat for the light source assembly 210. After each of the cooling fans 320 is turned on, the air outside the shell 400 can be drawn into the cavity 411 along each of the air inlets 412. Part of the air directly exchanges heat with the light source assembly 210, and the other part of the air exchanges heat with the radiator 310. The air after heat exchange is discharged to the outside of the shell 400 along each of the air outlet holes 413. Air cooling is adopted for heat dissipation, and cold air enters from both sides and hot air is discharged from the back. This can effectively improve the impact of hot air blowing from the front on personnel during the operation of the equipment. In specific occasions such as universities, laboratories, and scientific research institutions, there is no need to add additional cooling devices, saving installation space.

[0047] As a preferred embodiment, please refer to Figure 3 and Figure 5 The shell 400 also includes a bracket 460, which is built into the cavity 411 and is detachably fixed to the shell body 410. Each of the cooling fans 320 can be detachably fixed on the bracket 460, and the bracket 460 facilitates the support and installation of each of the cooling fans 320.

[0048] As a preferred embodiment, please refer to Figure 3 and Figure 5 The shell 400 also includes two dustproof nets 470, which are detachably arranged on both sides of the shell body 410 to cover the corresponding air inlets 412 on both sides of the shell body 410 to block dust. The dustproof nets 470 are magnetic, which is convenient for maintenance and replacement.

[0049] In order to better understand the present invention, the following Figure 1 - Figure 9The working principle of the technical solution of the utility model is described in detail:

[0050] During use, the optical fiber 1 coated with the coating after drawing is extended into the tube body 110 from one of the channels 121 and then extended from the other channel 121. Each of the secondary lenses 220 can converge a portion of the ultraviolet light emitted by each of the UVA photon modules 211, each of the UVB photon modules 212, and each of the UVC photon modules 213 in the corresponding light source assembly 210 onto the optical fiber 1. The reflector 230 converges another portion of the ultraviolet light emitted by each of the UVA photon modules 211, each of the UVB photon modules 212, and each of the UVC photon modules 213 onto the optical fiber 1 and reflects the ultraviolet light after passing through the optical fiber 1 onto the optical fiber 1, thereby enhancing the convergence of the ultraviolet light on the optical fiber 1, thereby improving the reflection of the optical fiber 1 under limited lighting conditions. The radiator 310 directly dissipates heat for each of the UVA photon modules 211, each of the UVB photon modules 212, and each of the UVC photon modules 213 when the ultraviolet radiation intensity is high. After each of the cooling fans 320 is turned on, the air outside the housing 400 can be drawn into the cavity 411 along each of the air inlets 412. Part of the air directly exchanges heat with each of the UVA photon modules 211, each of the UVB photon modules 212, and each of the UVC photon modules 213, and the other part of the air exchanges heat with the radiator 310. The air after heat exchange is discharged to the outside of the housing 400 along each of the air outlets 413, effectively preventing the light source assembly 210 from aging or damage due to long-term overheating, thereby extending the service life of the device.

[0051] The optical fiber drawing and curing device provided by the utility model has the following beneficial effects:

[0052] (1) Each of the UVA photon modules 211, each of the UVB photon modules 212, and each of the UVC photon modules 213 can simulate the multi-band spectrum of a mercury lamp, and can meet the requirement that a special optical fiber 1 has a good coating curing degree at a drawing speed of 50 m / min. The UVA photon module 211, the UVB photon module 212, and the UVC photon module 213 are compact in size, light in weight, easy to install and carry in multiple scenarios, and have low energy consumption, are ready for use, do not generate ozone, and are environmentally friendly;

[0053] (2) It adopts air cooling, with cold air entering from both sides and hot air discharged from the back, which can effectively improve the impact of hot air blowing from the front on personnel when operating the equipment. In specific occasions such as universities, laboratories, and scientific research institutions, there is no need to add additional cooling devices, saving installation space;

[0054] (3) It can enhance the convergence of ultraviolet light on optical fiber 1, thereby improving the ultraviolet irradiation intensity of optical fiber 1 under limited lighting conditions, and can dissipate heat for each photon module, effectively preventing the photon module from aging or damage due to long-term overheating, thereby extending the service life of the device.

[0055] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. An optical fiber drawing and curing device, characterized in that: include: A central tube, which is made of a transparent material and contains an inert gas for the optical fiber to pass through along its axial direction; an optical unit comprising a light source assembly, a secondary lens, and a reflector, wherein the light source assembly is disposed outside the central tube, the secondary lens is disposed between the central tube and the light source assembly to focus the ultraviolet light emitted by the light source assembly onto the optical fiber, and the reflector is disposed outside the central tube and opposite to the light source assembly to reflect the ultraviolet light emitted by the light source assembly onto the optical fiber; The heat dissipation unit is used to dissipate heat for the light source assembly.

2. The optical fiber drawing and curing device according to claim 1, characterized in that: The central tube includes a tube body and two end covers. Both ends of the tube body are opened. The two end covers are detachable fixed covers respectively arranged at both ends of the tube body. A channel is provided on each of the two end covers. Both channels are coaxial with and connected to the tube body.

3. The optical fiber drawing and curing device according to claim 2, characterized in that: It also includes a gas filling and extraction unit, which is connected to the central tube and is used to fill the central tube with inert gas and extract the waste gas in the central tube.

4. The optical fiber drawing and curing device according to claim 3, characterized in that: An air cavity is provided on each of the two end covers. The air cavity is an annular structure and is coaxial with the channel. An air port and a plurality of flow holes are also provided on each of the two end covers. The air port is connected to the air cavity, and one end of each of the flow holes is connected to the air cavity, and the other end of each of the flow holes is connected to the channel. The outlet end of the gas filling and exhaust unit is connected to the upstream gas port for filling inert gas into the central tube, and the inlet end of the gas filling and exhaust unit is connected to the downstream gas port for extracting the exhaust gas in the central tube.

5. The optical fiber drawing and curing device according to claim 4, characterized in that: The inflation and exhaust unit includes an inflation component and an exhaust component. The outlet end of the inflation component is connected to the upstream air port, and the inlet end of the exhaust component is connected to the downstream air port.

6. The optical fiber drawing and curing device according to claim 1, characterized in that: The light source assembly includes multiple UVA photon modules, multiple UVB photon modules and multiple UVC photon modules, and each of the UVA photon modules, each of the UVB photon modules and each of the UVC photon modules are arranged along the length direction of the central tube.

7. The optical fiber drawing and curing device according to claim 1, characterized in that: The secondary lens is a columnar structure and is arranged along the length direction of the central tube.

8. The optical fiber drawing and curing device according to claim 1, characterized in that: The reflective plate is an arc-shaped structure and is arranged along the length direction of the central tube.

9. The optical fiber drawing and curing device according to claim 2, characterized in that: It also includes a shell, which includes a shell body and a shell cover. The shell body has a cavity with an opening on one side. The shell cover is arranged at the opening of the cavity. The central tube passes through the shell body so that the tube body is placed in the cavity. The light source assembly, the secondary lens and the reflector are all built into the cavity.

10. The optical fiber drawing and curing device according to claim 9, characterized in that: Multiple air inlets are provided on two opposite side walls of the shell body, and each of the air inlets is communicated with the cavity. Multiple air outlets are provided on the other side wall of the shell body, and each of the air outlets is communicated with the cavity. The heat dissipation unit includes a radiator and multiple cooling fans. The radiator is a fin structure and is built into the cavity along the length direction of the central tube. The radiator is detachably fixed to the shell body, and the light source assembly is detachably fixed to the radiator. Each of the cooling fans is built into the cavity at intervals along the length direction of the central tube and is detachably fixed to the shell body. The inlet end of each cooling fan is communicated with each air inlet, and the outlet end of each cooling fan is communicated with each air outlet.

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