Thermal insulation device for optical fiber drawing

Abstract

The invention provides a thermal insulation device for optical fiber drawing, comprising: a mounting seat for mounting on an optical fiber drawing production line; the translation mechanism is movably connected to the mounting seat; the lifting mechanism is connected to the translation mechanism; the heat preservation assembly is connected to the lifting mechanism, the lifting mechanism drives the heat preservation assembly to move in the axial direction of the heat preservation assembly, the translation mechanism drives the heat preservation assembly to move in the plane direction of the heat preservation assembly, and an optical fiber penetrates through the heat preservation assembly. The thermal insulation device for optical fiber drawing is high in flexibility and compatibility, and can meet the production requirements of different types of optical fibers. Moreover, the thermal insulation device is good in sealing performance, can prevent air from entering to cause shock cooling, and reduces the internal stress of the optical fiber.

Description

Technical Field

[0001] The present application relates to the technical field of optical fiber drawing, and in particular to a heat preservation device for optical fiber drawing. Background Art

[0002] The fiber drawing annealing process is one of the key steps in fiber manufacturing. During the fiber drawing process, the glass preform is heated to a high temperature and then stretched into a thin optical fiber through a drawing tower. In order to ensure the quality and stability of the optical fiber, the drawn optical fiber needs to be annealed.

[0003] Therefore, heat preservation devices are often used in the optical fiber drawing process. By controlling the temperature and cooling rate of the optical fiber through the heat preservation device, the internal stress in the optical fiber can be eliminated and the structural uniformity and stability of the optical fiber can be ensured. In order to meet the production needs of different types of optical fibers, multi-stage heat preservation devices are usually set up. These heat preservation devices are connected in series to gradually reduce the temperature to ensure that the optical fiber can be properly heat treated during the drawing process.

[0004] However, the current multi-stage insulation device is usually fixedly installed on the optical fiber production line and cannot be flexibly adjusted according to the production requirements of different types of optical fibers. This fixedness limits the flexibility of the production line and makes it difficult to meet the market's customized needs for optical fibers with various performances. Summary of the invention

[0005] In view of the above problems, the embodiment of the present application provides a heat preservation device for optical fiber drawing, which has high flexibility and strong compatibility and can meet the production requirements of different types of optical fibers. In addition, the heat preservation device has good sealing performance, which can prevent air from entering and causing sudden cooling, and reduce the internal stress of the optical fiber.

[0006] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0007] An embodiment of the present application provides an insulation device for optical fiber drawing, including: a mounting seat for installation on an optical fiber drawing production line; a translation mechanism movably connected to the mounting seat; a lifting mechanism connected to the translation mechanism; an insulation component connected to the lifting mechanism, the lifting mechanism drives the insulation component to move along the axial direction of the insulation component, and the translation mechanism drives the insulation component to move along the planar direction of the insulation component, and the insulation component is used to pass the optical fiber.

[0008] In a possible implementation, the translation mechanism includes: a rotating seat rotatably connected to the mounting seat; a support plate connected to the rotating seat, and the lifting mechanism is installed on the support plate.

[0009] In a possible implementation, an arc-shaped limiting groove is provided on the rotating seat, and a pressing shaft is arranged in the arc-shaped limiting groove; wherein, when the pressing shaft is locked, the rotating seat is locked; and when the pressing shaft is loosened, the rotating seat is released.

[0010] In a possible embodiment, the lifting mechanism includes: a driving assembly connected to the translation mechanism; a moving part, which is transmission-connected to the driving assembly, the insulation assembly is connected to the moving part, and the moving part is driven by the driving assembly to move axially along the insulation assembly.

[0011] In one possible embodiment, the driving assembly includes: a driving shaft connected to the translation mechanism and extending along the axial direction of the insulation assembly, and a moving part movably connected to the driving shaft; a driver connected to the driving shaft and used to drive the driving shaft to rotate so as to drive the moving part to move axially along the driving shaft.

[0012] In a possible embodiment, the driver is arranged at the end of the drive shaft.

[0013] In a possible implementation, the driving assembly further includes: a guide rail connected to the translation mechanism and extending along the axial direction of the heat preservation assembly, and the moving member moves along the guide rail.

[0014] In a possible embodiment, the insulation assembly includes: an insulation cover connected to a lifting mechanism; an insulation pipe inserted into the insulation cover and extending axially of the insulation cover, with both ends of the insulation pipe extending out of the insulation cover, and the insulation pipe is used to connect with the insulation pipe of another insulation device.

[0015] In a possible implementation manner, a sealing member is provided at the end of the insulation pipe, and the sealing member is used to seal the joint between the insulation pipe and the insulation pipe of another insulation device.

[0016] In a possible implementation manner, a connecting piece is provided at the end of the heat-insulating cover, and the sealing piece is fixed to the connecting piece.

[0017] The heat preservation device for optical fiber drawing provided by the present application comprises a mounting seat, a translation mechanism, a lifting mechanism and a heat preservation assembly. The mounting seat is fixedly mounted on the optical fiber drawing production line, the translation mechanism is connected to the mounting seat, the lifting mechanism is connected to the translation mechanism, the heat preservation assembly is connected to the lifting mechanism, and the optical fiber can pass through the heat preservation assembly. Among them, the translation mechanism can move relative to the mounting seat to drive the heat preservation assembly to move along the plane direction of the heat preservation assembly itself through the translation mechanism. Therefore, the heat preservation assembly can be moved to the production line and located at a position where the optical fiber can pass through, or the heat preservation assembly can also be moved to one side of the production line and located at a position where the optical fiber cannot pass through. In this way, it is possible to flexibly adjust whether the optical fiber passes through the heat preservation assembly according to the production requirements of the optical fiber, and the free matching of the number of heat preservation devices on the optical fiber drawing production line can be met. The lifting mechanism can drive the heat preservation assembly to move along the axial direction of the heat preservation assembly. In this way, when multiple heat preservation devices are used in combination, the adjacent heat preservation devices can be closely connected together by moving the heat preservation assembly up and down, and a good sealing effect can be achieved. It can prevent the optical fiber from contacting the air and suddenly cooling, and reduce the stress inside the optical fiber. Thereby, the flexibility and compatibility of the heat preservation device for optical fiber drawing are improved, and the stability of optical fiber performance is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the structure of a heat preservation device for optical fiber drawing provided in an embodiment of the present application;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the heat preservation device after removing the heat preservation component;

[0021] Figure 3 for Figure 2 A partial enlarged view of the heat preservation device at position A;

[0022] Figure 4 A schematic structural diagram of the connection portion of two adjacent heat preservation devices provided in an embodiment of the present application.

[0023] Description of reference numerals:

[0024] 10-Insulation device for optical fiber drawing;

[0025] 100-mounting seat; 200-translation mechanism; 300-lifting mechanism; 400-insulation component;

[0026] 110-mounting plate; 120-mounting member; 210-rotating shaft; 220-rotating seat; 230-supporting plate; 310-driving assembly; 320-moving member; 410-insulating cover; 420-insulating pipe;

[0027] 221-arc limit groove; 311-driving shaft; 312-driver; 313-fixed seat; 314-guide rail; 421-seal; 422-connector;

[0028] 2211-pressing shaft; 3131-first fixing member; 3132-second fixing member. DETAILED DESCRIPTION

[0029] As described in the background technology, during the optical fiber drawing process, an annealing process is required to make the optical fiber have good mechanical and optical properties. For example, CN108919415B discloses a low-loss single-mode optical fiber and its drawing process, and specifically discloses an optical fiber drawing process that gradually reduces the temperature from 1700°C to 1000°C through an annealing tube and a matrix insulation tube. This process reduces the accumulation of internal stress by strictly controlling the temperature gradient during the cooling process, thereby reducing the attenuation of the optical fiber, but the compatibility is poor and cannot meet the production requirements of different types of optical fibers. CN213475790U discloses an optical fiber drawing annealing device, in which the multi-stage insulation structure of the device shares an integral shell, and the insulation structures are well sealed, but each insulation structure cannot be flexibly adjusted to meet personalized needs. CN218723118U discloses a heat preservation furnace reset device, which is provided with a lateral moving mechanism to facilitate the maintenance of the heat preservation furnace, but the structure cannot effectively seal the heat preservation furnaces. CN100453483C discloses a method for manufacturing optical fiber, which adopts a fixed sealing structure with a drawing furnace and is also not compatible with the production of multiple optical fibers.

[0030] Therefore, the current insulation device has poor flexibility and cannot be adjusted according to the production needs of different types of optical fibers, which will increase unnecessary energy consumption and production costs. In addition, the sealing performance is poor, which makes it easy for outside air to enter and cause sudden cooling of the optical fiber, increasing the internal stress and loss of the optical fiber.

[0031] In order to solve the above problems, the present application provides a heat preservation device for optical fiber drawing, including a mounting seat, a translation mechanism, a lifting mechanism and a heat preservation component. The mounting seat is fixedly mounted on the optical fiber drawing production line, the translation mechanism is connected to the mounting seat, the lifting mechanism is connected to the translation mechanism, the heat preservation component is connected to the lifting mechanism, and the optical fiber can pass through the heat preservation component. Among them, the translation mechanism can move relative to the mounting seat to drive the heat preservation component to move along the plane direction of the heat preservation component itself through the translation mechanism. Therefore, the heat preservation component can be moved to the production line and located at a position where the optical fiber can pass through, or the heat preservation component can also be moved to one side of the production line and located at a position where the optical fiber cannot pass through. In this way, it is possible to flexibly adjust whether the optical fiber passes through the heat preservation component according to the production requirements of the optical fiber, and the free matching of the number of heat preservation devices on the optical fiber drawing production line can be met. The lifting mechanism can drive the heat preservation component to move along the axial direction of the heat preservation component. In this way, when multiple heat preservation devices are used in combination, the adjacent heat preservation devices can be closely connected together by moving the heat preservation component up and down, and a good sealing effect can be achieved. It can prevent the optical fiber from contacting the air and suddenly cooling, and reduce the stress inside the optical fiber. Thereby, the flexibility and compatibility of the heat preservation device for optical fiber drawing are improved, and the stability of optical fiber performance is improved.

[0032] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0033] Figure 1 This is a schematic diagram of the structure of the heat preservation device for optical fiber drawing provided in the embodiment of the present application. Figure 1 As shown, the embodiment of the present application provides a heat preservation device for optical fiber drawing (hereinafter referred to as the heat preservation device). During the optical fiber drawing process, the preform is heated and stretched into a slender optical fiber. The heat preservation device 10 can provide a controllable and stable environment during the optical fiber drawing process, and can properly heat and slowly cool the optical fiber to avoid the generation of internal stress in the optical fiber due to sudden cooling due to contact with air. Thereby, the mechanical strength and flexibility of the optical fiber can be improved, and the quality and stability of the optical fiber can be guaranteed.

[0034] Reference Figure 1 As shown, the heat preservation device 10 is provided with a mounting seat 100, and the mounting seat 100 is used to fix the heat preservation device 10 to the optical fiber drawing production line. The mounting seat 100 can be fixed in a variety of ways.

[0035] Exemplarily, the mounting seat 100 may include a mounting plate 110, and the mounting seat 100 is fixed to the production line through the mounting plate 110. For example, mounting plates 110 may be provided at both ends of the heat preservation device 10, and both mounting plates 110 may be fixed to the optical fiber drawing production line. In this way, the heat preservation device 10 is fixed and limited at both ends by two mounting plates 110, which can enhance the installation strength of the heat preservation device 10 and improve the stability and reliability of the installation of the heat preservation device.

[0036] The mounting plate 110 can be locked on the optical fiber drawing production line by fasteners such as bolts, screws or rivets. Alternatively, the mounting plate 110 can also be fixed on the production line by bonding, clamping, etc. As long as the thermal insulation device 10 can be installed firmly and reliably, the present embodiment does not specifically limit the installation method of the thermal insulation device 10.

[0037] Figure 2 for Figure 1 Schematic diagram of the structure of the heat preservation device after removing the heat preservation component. Figure 1 and Figure 2 As shown, the heat preservation device 10 further includes a translation mechanism 200 and a lifting mechanism 300, wherein the translation mechanism 200 is connected to the mounting seat 100, and the lifting mechanism 300 is connected to the translation mechanism 200. In addition, the lifting mechanism 300 is also connected to a heat preservation assembly 400, through which the optical fiber can pass.

[0038] The translation mechanism 200 can drive the heat preservation component 400 to move along the plane direction of the heat preservation component 400 , and the lifting mechanism 300 can drive the heat preservation component 400 to move along the axial direction of the heat preservation component 400 .

[0039] Figure 3 for Figure 2 A partial enlarged view of the insulation device at A. Figure 3 As shown, in a possible embodiment, the mounting seat 100 may include a mounting member 120, and the translation mechanism 200 may include a rotating shaft 210. The mounting member 120 and the rotating shaft 210 may be fixedly connected. For example, the mounting member 120 and the rotating shaft 210 may be welded together, or they may be connected together by installing bolts and nuts on the mounting member 120 and the rotating shaft 210. The most suitable connection scheme may be selected according to actual application requirements, and this embodiment does not impose any specific restrictions on this.

[0040] Reference Figure 1 and Figure 3As shown, the translation mechanism 200 includes a rotating seat 220, which is provided with a through hole. The rotating shaft 210 can be inserted into the through hole of the rotating seat 220, and the rotating shaft 210 can rotate relative to the rotating seat 220. Thus, the translation mechanism 200 can achieve circumferential swing relative to the mounting seat 100, thereby driving the insulation component 400 to move along the planar direction of the insulation component 400.

[0041] Specifically, refer to Figure 3 As shown, the rotating seat 220 may be provided with an arc-shaped limit groove 221, and the two ends of the arc-shaped limit groove 221 correspond to two extreme positions respectively. A pressing shaft 2211 may also be installed in the arc-shaped limit groove 221 to lock or release the rotating seat 220. Exemplarily, when the pressing shaft 2211 is locked, the rotating seat 220 is locked and cannot move; when the pressing shaft 2211 is released, the rotating seat 220 is released, and the rotating seat 220 can rotate along the rotating shaft 210 to the two extreme positions of the arc-shaped limit groove 221, and at the same time drive the heat preservation component 400 to swing circumferentially.

[0042] It should be noted that when the rotating seat 220 rotates to one of the extreme positions of the arc-shaped limit groove 221, the insulation component 400 swings to the production line, and the optical fiber can just pass through the insulation component 400. For the sake of convenience, this extreme position is defined as the first position; when the rotating seat 220 rotates to the other extreme position of the arc-shaped limit groove 221, the insulation component 400 swings to one side of the production line, and the optical fiber will not pass through the insulation component 400. Correspondingly, this extreme position is defined as the second position.

[0043] That is to say, when the heat preservation device 10 is needed in the optical fiber drawing process, the rotating seat 220 can be rotated to the first position of the arc-shaped limit groove 221, and the optical fiber can pass through the heat preservation component 400. When the heat preservation device 10 is not needed in the optical fiber drawing process, for example, in the drawing process of communication optical fiber with non-low attenuation requirements, the rotating seat 220 can be rotated to the second position of the arc-shaped limit groove 221, and the heat preservation component 400 is moved to one side of the production line, and the optical fiber can avoid the heat preservation component 400. In this way, the heat preservation device 10 can adjust the position of the heat preservation component 400 according to the actual production needs to adjust whether the heat preservation device 10 is involved in the production, which can meet the free matching of the number of heat preservation devices 10 on the production line, with strong flexibility, and can effectively reduce energy consumption and production costs while being compatible with the production of optical fibers with various performance requirements.

[0044] In addition, when the insulation device 10 fails, the rotating seat 220 is rotated to the second position of the arc-shaped limit groove 221, that is, the insulation device 10 is swung to the side of the production line, which can also facilitate the inspection and maintenance of the insulation device 10 and reduce the difficulty of equipment maintenance.

[0045] Furthermore, when the optical fiber does not need to be insulated, the insulation assembly 400 is moved to one side of the production line, and the freed space on the production line can be used to install other necessary equipment. For example, an equal material structure can be introduced on the production line to ensure that the preform rods remain uniform and consistent during the melting and drawing process, so that a more efficient process flow can be achieved in a limited production space, which can improve production efficiency and reduce production costs.

[0046] Of course, the translation mechanism 200 can drive the heat preservation component 400 to move in the plane direction thereof, and it can also be realized by other means instead of rotation. For example, the translation mechanism 200 can be set to be a cylinder / hydraulic cylinder transmission or a screw transmission, and the translation mechanism 200 moves linearly relative to the mounting seat 100. In this way, by moving the translation mechanism 200 toward the mounting seat 100 or away from the mounting seat 100, the heat preservation component 400 can be aligned with the optical fiber or the heat preservation component can be deviated from the optical fiber. No further details will be given here.

[0047] In a possible implementation, the mounting member 120 may be configured as a structure of a sleeve and a built-in rod, the built-in rod may be telescopic relative to the sleeve, and exemplary, the sleeve and the built-in rod may be provided with adjustment screws respectively, and the length of the built-in rod extending from the sleeve may be controlled by adjusting the position and tightening degree of the screws. Alternatively, multiple snap positions may be provided in the sleeve, and corresponding snap grooves or snap rings may be provided on the built-in rod, and the distance of the built-in rod extending from the sleeve may be adjusted by moving the built-in rod and snapping the snap ring into different positions, and this embodiment does not impose any specific restrictions on this.

[0048] Specifically, the sleeve can be fixedly mounted on the mounting base 100, and the built-in rod is fixedly connected to the rotating shaft 210. Therefore, the built-in rod can drive the translation mechanism 200 to extend and retract relative to the sleeve through the rotating shaft 210, thereby driving the insulation component 400 to move in its planar direction.

[0049] In addition, the translation mechanism 200 also includes a support plate 230, which is connected to the rotating seat 220 and swings circumferentially with the rotating seat 220. The lifting mechanism 300 can be installed on the support plate 230. By setting the support plate 230, a support plate 230 with a larger surface area can be set. In this way, there is enough space on the surface of the support plate to set the various components of the lifting mechanism to ensure that the lifting mechanism is stably and reliably connected to the support plate. In addition, the support plate can also provide space for movement and guidance to facilitate the movement of the lifting mechanism. Then, the thermal insulation component is driven to rise and fall by the lifting mechanism.

[0050] Continue to refer to Figure 2As shown, the lifting mechanism 300 includes a driving assembly 310 and a moving member 320, wherein the driving assembly 310 is mounted on the support plate 230, and the moving member 320 is connected to the driving assembly 310. In addition, the driving assembly 310 can drive the moving member 320 to move, thereby driving the heat preservation assembly 400 to move through the moving member 320.

[0051] Specifically, the driving assembly 310 may include a driving shaft 311 and a driver 312. The driving shaft 311 is connected to the translation mechanism 200 and extends along the axial direction of the heat preservation assembly 400. The moving member 320 may pass through the driving shaft 311, and the moving member 320 may move along the axial direction of the driving shaft 311 as the driving shaft 311 rotates. The driver 312 may be disposed at the end of the driving shaft 311, and the driver 312 is used to drive the driving shaft 311 to rotate.

[0052] For example, the driving shaft 311 is mounted on the support plate 230, and the driving shaft 311 extends in the height direction of the support plate 230. The driving shaft 311 can be specifically located in the middle area of ​​the width direction of the support plate 230, and both ends of the driving shaft 311 extend close to both ends of the support plate 230. The driver 312 can be mounted at the bottom end of the driving shaft 311 or the top end of the driving shaft 311.

[0053] Furthermore, the drive shaft 311 may be configured as a screw, and the driver 312 may be in the form of an adjusting nut, whereby the driver 312 may realize the rotation of the drive shaft 311 through threaded transmission. Alternatively, a gear may be provided between the driver 312 and the drive shaft 311, and the rotation of the drive shaft 311 may be realized by utilizing the meshing of the gears, which is not specifically limited in this embodiment.

[0054] In a possible implementation, the driving assembly further includes a fixing seat 313, and the fixing seat 313 may include a first fixing member 3131 and a second fixing member 3132. The first fixing member 3131 and the second fixing member 3132 may be respectively mounted on both ends of the supporting plate 230, and through holes are provided on the first fixing member 3131 and the second fixing member 3132. Both ends of the driving shaft 311 may respectively pass through the through hole on the first fixing member 3131 and the through hole of the second fixing member 3132, and be rotatably connected with the first fixing member 3131 and the second fixing member 3132.

[0055] In a possible implementation, the drive assembly 310 may further include a guide rail 314, the extension direction of the guide rail may be consistent with the extension direction of the drive shaft, and the guide rail may be arranged side by side on the side of the drive shaft. The moving member 320 may move along the guide rail 314, thereby ensuring that the moving member 320 will not deflect during the movement, and can maintain linear motion, thereby improving the accuracy and reliability of the movement.

[0056] Exemplarily, the guide rail 314 can be set as a slide rail of a sliding groove type. In addition, the guide rail 314 can be provided with a surface with a low friction coefficient, thereby reducing the friction between the moving part 320 and the guide rail 314, improving the movement efficiency, and reducing the wear and energy loss of the moving part 320.

[0057] In addition, two guide rails can be installed on the support plate, and the two guide rails 314 are respectively located on both sides of the support plate 230, and the drive shaft is located between the two guide rails. By arranging two guide rails on both sides of the drive shaft, the two guide rails can guide the two sides of the moving part respectively. In this way, during the movement of the moving part, the overall force is more balanced, the moving trajectory is more accurate, and the movement is more stable.

[0058] The heat preservation component 400 can be connected to the moving member 320, so that the moving member can drive the heat preservation component to move along the axial direction of the heat preservation component itself. Figure 1 As shown, the heat preservation assembly 400 includes a heat preservation cover 410 and a heat preservation tube 420, wherein the heat preservation cover 410 is connected to the moving member 320 and the heat preservation tube is arranged inside the heat preservation cover. The optical fiber can pass through the heat preservation tube to keep the optical fiber warm or gradually cool it through the heat preservation tube to ensure that it is kept in a controlled environment during the drawing process.

[0059] The side surface of the heat preservation cover 410 can be designed to be arc-shaped or square-shaped according to specific application requirements to adapt to different space and functional requirements, and this embodiment does not impose specific restrictions on this. The heat preservation cover 410 can form a relatively sealed space to prevent external dust and impurities from entering, thereby protecting the internal environment of the heat preservation component 400 from being clean. In addition, the heat preservation cover 410 can provide physical protection for the heat preservation pipe 420, thereby extending the service life of the equipment.

[0060] The surfaces at both axial ends of the heat preservation cover 410 may be planes and provided with through holes, and the heat preservation pipe 420 is passed through the through holes and is arranged in the heat preservation cover 410. The heat preservation pipe may extend along the axial direction of the heat preservation cover 410, and both ends of the heat preservation pipe 420 extend out of the heat preservation cover 410 through the through holes.

[0061] In order to effectively keep the optical fiber warm, heating elements may be integrated in the heat preservation cover 410. The temperature of these heating elements can be set according to actual production requirements to heat the heat preservation tube 420. Through precise temperature control, it can be ensured that the optical fiber can be evenly heat-treated when passing through the heat preservation tube 420, thereby effectively eliminating the stress generated during the drawing process.

[0062] It should be noted that a plurality of heat preservation devices 10 may be provided on the optical fiber drawing production line, and the temperature of each heat preservation device 10 may be controlled individually to meet the requirements of different optical fiber production processes.

[0063] Figure 4This is a schematic diagram of the structure of the connection part of two adjacent heat preservation devices provided in the embodiment of the present application. Figure 4 As shown, when multiple insulation devices 10 are used in combination, a seal 421 may be provided at the end of the insulation cover 410. For example, the material of the seal 421 may be graphite packing with excellent high temperature resistance and corrosion resistance. As long as it can ensure good sealing and elastic properties, this embodiment does not impose specific restrictions on this.

[0064] In this way, when a plurality of heat preservation devices 10 are used simultaneously, the heat preservation pipes 420 of two adjacent heat preservation devices 10 are butt-jointed together and the sealing members 421 are compressed, so that a continuous seal of the plurality of sealing devices 10 can be formed.

[0065] In addition, a connector 422 may be provided at the end of the heat preservation cover 410, and the seal 421 is fixed on the connector 422. The connector 422 may be welded to the heat preservation cover 410, or may be connected to the heat preservation cover 410 by a thread, and this embodiment does not impose any specific limitation on this.

[0066] It should be noted that directly connecting the two insulation tubes 420 may result in the joint being not tight enough, thereby affecting the effective compression of the seal 421, resulting in an unsatisfactory sealing effect. This poor sealing may expose the optical fiber to the air during the drawing process, resulting in a sudden cooling phenomenon, thereby increasing the internal stress of the optical fiber. In order to solve this problem, the seal 421 can be used in combination with the lifting mechanism 300 to achieve a more reliable seal.

[0067] Specifically, after two adjacent insulation tubes 420 are initially docked, the lifting mechanism 300 of one of the insulation devices 10 is adjusted to move it upward or downward in the axial direction of the insulation assembly 400 until the insulation tube 420 can be tightly docked with the adjacent insulation tube 420 and the seal 421 is pressed. In this way, an efficient sealing barrier can be formed with a good sealing effect, which can effectively prevent the optical fiber from being suddenly cooled by contact with air during the drawing process and reduce the internal stress of the optical fiber.

[0068] In addition, during the production of optical fiber, after the preform rod is heated in a heating furnace (not shown in the figure), the bottom begins to soften and sags under the action of gravity to form a slender optical fiber. The insulation device 10 can be connected to the bottom of the heating furnace. After the optical fiber comes out of the heating furnace, it enters the insulation device 10 to control the temperature during the drawing process and ensure the stability of the optical fiber quality.

[0069] It should be noted that the end of the preform rod is usually uneven when it is just melted, which needs to be cut off manually or by automated equipment. However, the gap between the insulation device 10 and the heating furnace is usually small, which is very inconvenient to operate. To this end, the lifting mechanism 300 of the insulation device 10 can be adjusted to move downward along the axial direction of the insulation component 400, so that enough space can be left between the insulation tube 420 and the heating furnace port, which is convenient for operators or automated equipment to cut off the uneven end of the optical fiber.

[0070] After the cutting is completed, the lifting mechanism 300 is adjusted again to move the insulation assembly 400 upward until the gap between the insulation tube 420 and the heating furnace port is smaller, ensuring that the optical fiber continues to be in a controlled environment during the subsequent drawing process.

[0071] Of course, the heat preservation assembly 400 can also be moved to one side of the production line by adjusting the translation mechanism 200, and after the shearing is completed, the translation mechanism 200 is adjusted to move the heat preservation assembly 400 to a position on the production line where the optical fiber can pass. This design can flexibly adjust the heat preservation device 10 according to needs during the production process, reduce unnecessary downtime and operation steps, and can return to normal production status more quickly, simplify the operation process, and improve production efficiency.

[0072] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0073] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A heat preservation device for optical fiber drawing, characterized in that: include: A mounting base (100) is used for mounting on an optical fiber drawing production line; A translation mechanism (200) movably connected to the mounting seat (100); A lifting mechanism (300) connected to the translation mechanism (200); The heat preservation component (400) is connected to the lifting mechanism (300), the lifting mechanism (300) drives the heat preservation component (400) to move along the axial direction of the heat preservation component (400), and the translation mechanism (200) drives the heat preservation component (400) to move along the planar direction of the heat preservation component (400), and the heat preservation component (400) is used to pass the optical fiber.

2. The heat preservation device for optical fiber drawing according to claim 1, characterized in that: The translation mechanism comprises: A rotating seat (220) rotatably connected to the mounting seat (100); The support plate (230) is connected to the rotating seat (220), and the lifting mechanism (300) is installed on the support plate (230).

3. The heat preservation device for optical fiber drawing according to claim 2, characterized in that: The rotating seat (220) is provided with an arc-shaped limiting groove (221), and a pressing shaft (2211) is arranged in the arc-shaped limiting groove (221); When the pressing shaft (2211) is locked, the rotating seat (220) is locked; when the pressing shaft (2211) is loosened, the rotating seat (220) is released.

4. The heat preservation device for optical fiber drawing according to any one of claims 1 to 3, characterized in that: The lifting mechanism (300) comprises: A driving assembly (310) connected to the translation mechanism (200); The moving part (320) is transmission-connected to the driving component (310), the heat-insulating component (400) is connected to the moving part (320), and the moving part (320) is driven by the driving component (310) to move along the axial direction of the heat-insulating component (400).

5. The heat preservation device for optical fiber drawing according to claim 4, characterized in that: The driving assembly (310) comprises: A driving shaft (311) connected to the translation mechanism (200) and extending along the axial direction of the heat preservation component (400), and the moving member (320) is movably connected to the driving shaft (311); The driver (312) is connected to the driving shaft (311) and is used to drive the driving shaft (311) to rotate, so as to drive the moving member (320) to move along the axial direction of the driving shaft (311).

6. The heat preservation device for optical fiber drawing according to claim 5, characterized in that: The driver (312) is arranged at the end of the driving shaft (311).

7. The heat preservation device for optical fiber drawing according to claim 5, characterized in that: The drive assembly (310) further includes: The guide rail (314) is connected to the translation mechanism (200) and extends along the axial direction of the heat preservation component (400), and the moving member (320) moves along the guide rail (314).

8. The heat preservation device for optical fiber drawing according to any one of claims 1 to 3, characterized in that: The heat preservation component (400) comprises: A heat-insulating cover (410) connected to the lifting mechanism (300); The insulation pipe (420) is inserted into the insulation cover (410) and extends along the axial direction of the insulation cover (410), and both ends of the insulation pipe (420) extend out of the insulation cover (410). The insulation pipe (420) is used to connect with the insulation pipe (420) of another insulation device.

9. The heat preservation device for optical fiber drawing according to claim 8, characterized in that: A sealing member (421) is provided at the end of the heat preservation pipe, and the sealing member (421) is used to seal the joint between the heat preservation pipe (420) and the heat preservation pipe (420) of another heat preservation device.

10. The heat preservation device for optical fiber drawing according to claim 9, characterized in that: A connecting piece (422) is provided at the end of the heat-insulating cover, and the sealing piece (421) is fixed to the connecting piece (422).

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