Optical fiber preform mandrel vad deposition argon heating device

Abstract

This utility model relates to the technical field of argon gas pipeline heating, and in particular to an argon gas heating device for VAD deposition of optical fiber preform core rods. It features stacked argon gas pipelines, i.e., corresponding heating structures, combined with an external insulation box, resulting in a small footprint, convenient maintenance, and improved practicality. The device includes argon gas pipelines and heating tubes, with the outer side of the argon gas pipelines connected to the inner side of the heating tubes. It also includes an insulation box, a support bracket, a constraint sleeve, a movable shaft, a connecting piece, a box cover, insulation cotton, a movable shaft sleeve, a pin, a handle, a moving pin bracket, and a fixed pin piece. The argon gas pipelines are longitudinally stacked and fixed inside the insulation box via the heating tubes, with both the input and output sides of the argon gas pipelines protruding outwards. The rear top of the insulation box is connected to the bottom side of the constraint sleeve via the support bracket. The inner side of the constraint sleeve is rotatably connected to the outer side of the movable shaft. The front side of the movable shaft is movably connected to the lower rear side of the box cover via the connecting piece. Insulation cotton is connected to the inner side of the box cover, and the lower middle side of the front end of the box cover is connected to the outer side of the movable shaft sleeve.

Description

Technical Field

[0001] This utility model relates to the technical field of argon gas pipeline heating, specifically to an argon gas heating device for VAD deposition on optical fiber preform core rods. Background Technology

[0002] VAD (Vacuum Axial Deposition) is one of the core processes in optical fiber preform manufacturing. Its core steps include porous preform deposition, dehydration sintering, thinning, and the addition of external tubes. The VAD method uses a hydrogen-oxygen flame to hydrolyze halide vapor at high temperature to generate glass oxide dust, which is vertically deposited on the bottom of a rotating target to form a porous preform. Subsequently, chlorine dehydration and high-temperature sintering are completed in a graphite furnace to finally obtain a transparent core rod.

[0003] An existing optical fiber preform core rod VAD deposition argon gas heating device, such as the one described in patent publication number CN215440226U, uses a circuit breaker to power on a temperature controller, sets its parameters, and then activates a solid-state relay. By adjusting the target temperature on the temperature controller, a signal is sent to the solid-state relay, which then controls the opening and closing of the heating element in the pipeline. Heating is activated when the target temperature is not reached and deactivated when it is. This maintains the argon gas pipeline at a stable temperature. Temperature measurement and control via temperature sensors achieve closed-loop temperature control, precisely controlling the pipeline's heating temperature. This solves the problem of substandard optical performance in finished optical fiber preforms. The included heating element insulation jacket effectively increases the insulation time after heating, improving the insulation effect.

[0004] However, this device requires multiple clamps to fix long argon tubes, making maintenance inconvenient and its practicality insufficient. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides an argon gas heating device for VAD deposition on optical fiber preform core rods, which features stacked argon gas pipelines (i.e., corresponding heating structures) and an external insulation box. This device occupies a small volume, is easy to maintain, and improves practicality.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: an argon gas heating device for VAD deposition of optical fiber preform core rods, comprising an argon gas pipeline and a heating tube, wherein the outer side of the argon gas pipeline is sleeved with the inner side of the heating tube, and further comprising an insulation box, a support bracket, a constraint sleeve, a movable shaft, a connecting piece, a box cover, insulation cotton, a movable shaft sleeve, a pin, a handle, a moving pin bracket, and a fixed pin piece, wherein the argon gas pipeline is longitudinally stacked and fixed inside the insulation box via the heating tube, and both the input and output sides of the argon gas pipeline are directed towards... The top rear side of the insulated box is connected to the bottom side of the constraint sleeve via a bracket. The inner side of the constraint sleeve is rotatably connected to the outer side of the movable shaft. The front side of the movable shaft is movably connected to the lower rear side of the box cover via a connecting piece. The inner side of the box cover is connected with insulation cotton. The inner middle and lower side of the front of the box cover is connected to the outer side of the movable shaft sleeve. The inner wall of the movable shaft sleeve is rotatably connected to the outer wall of the pin. The outer side of the pin is connected to the middle of the inner side of the handle. The inner side of the pin is connected to the upper part of the inner side of the moving pin frame. The top middle and front side of the inside of the insulated box is connected with a fixed pin piece.

[0009] Preferably, it also includes support legs and a fixed base. The four corners of the bottom of the insulated box are respectively connected to the top side of a set of support legs, and the bottom side of each set of support legs is respectively connected to the inner side of the top of a set of fixed bases.

[0010] Preferably, it also includes a bracket, a magnet block, and a ferromagnetic sheet. The inner sides of the two sets of rear legs are connected to the bottom side of the magnet block via the bracket, and the middle and rear side of the top of the box cover is connected to the inner side of the ferromagnetic sheet.

[0011] Preferably, it also includes an information board, with the front side of the top of the box cover connected to the inner side of the information board.

[0012] Preferably, it also includes a plastic support lamp post, a lampshade, and a light bulb. The rear right side of the insulated box is connected to the outside of the lampshade via the plastic support lamp post, and a light bulb is installed inside the lampshade.

[0013] Preferably, it also includes a storage rack, a drawer, and a pull handle. The front side of the bottom end of the insulated box is connected to the top side of the storage rack, the inner side of the storage rack is longitudinally slidably connected to the outer side of the drawer, and the middle of the front side of the drawer is connected to the rear side of the pull handle.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides an argon gas heating device for VAD deposition of optical fiber preform core rods, which has the following beneficial effects:

[0016] During VAD deposition of optical fiber preforms, the argon gas pipeline is heated and controlled in real time. When the box cover is closed, the interior can be sealed. The heating tube is covered with insulation cotton for insulation, and the box cover is locked by the action of the moving pin and the fixed pin plate. When internal maintenance is required, the handle can be turned to make the pin rotate under the constraint of the shaft sleeve. The moving pin is rotated and pinned out inside the fixed pin plate. Then the box cover is rotated under the constraint of the constraint sleeve via the moving shaft. The insulation box connected to the box cover and the sleeve bracket by the connecting piece can be flipped open. The stacked argon gas pipelines are corresponding to the heating structure. With the external insulation box, it occupies a small volume, is easy to maintain, and improves practicality. Attached Figure Description

[0017] Figure 1 This is an axial view illustrating the structure of this utility model.

[0018] Figure 2 This utility model Figure 1 Front view;

[0019] Figure 3 This utility model Figure 1 Top view;

[0020] Figure 4 This utility model Figure 1 Rear view.

[0021] The following are labels in the attached diagram: 1. Argon gas pipeline; 2. Heating tube; 3. Insulation box; 4. Support bracket; 5. Constraint sleeve; 6. Movable shaft; 7. Connecting piece; 8. Box cover; 9. Insulation cotton; 10. Movable shaft sleeve; 11. Pin; 12. Handle; 13. Moving pin bracket; 14. Fixed pin piece; 15. Support leg; 16. Fixed base; 17. Bracket; 18. Magnet block; 19. Ferromagnetic sheet; 20. Information board; 21. Plastic support lamp post; 22. Lampshade; 23. Light bulb; 24. Storage rack; 25. Drawer; 26. Pull handle. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example

[0024] Please see Figure 1-4An argon heating device for VAD deposition of optical fiber preform core rods includes an argon gas pipe 1 and a heating tube 2. The outer side of the argon gas pipe 1 is sleeved with the inner side of the heating tube 2. It also includes an insulation box 3, a support bracket 4, a constraint sleeve 5, a movable shaft 6, a connecting piece 7, a box cover 8, insulation cotton 9, a movable shaft sleeve 10, a pin 11, a handle 12, a moving pin bracket 13, and a fixed pin piece 14. The argon gas pipe 1 is longitudinally stacked and fixed inside the insulation box 3 via the heating tube 2, with both the input and output sides of the argon gas pipe 1 protruding outwards. The rear top of the insulation box 3 is connected to the bottom side of the constraint sleeve 5 via the support bracket 4. The inner side of the constraint sleeve 5 is rotatably connected to the outer side of the movable shaft 6. The front side of the movable shaft 6 is movably connected to the lower rear end of the box cover 8 via the connecting piece 7. Insulation cotton 9 is connected to the inner side of the box cover 8. The lower middle part of the front end of the box cover 8 is connected to the outer side of the movable shaft sleeve 10. The inner wall is rotatably connected to the outer wall of the pin 11. The outer side of the pin 11 is connected to the middle of the inner side of the handle 12. The inner side of the pin 11 is connected to the upper part of the inner side of the moving pin frame 13. The top center front side of the inside of the insulation box 3 is connected to the fixed pin plate 14. During the deposition of VAD on the optical fiber preform, the argon gas pipeline 1 is heated and controlled in real time. When the box cover 8 is in the closed state, the inside can be sealed. The heating tube 2 is covered with insulation cotton 9 for insulation. The moving pin frame 13 and the fixed pin plate 14 act to lock and fix the box cover 8. When internal maintenance is required, the handle 12 can be turned to make the pin 11 rotate under the constraint of the shaft movable sleeve 10. The moving pin frame 13 is rotated out inside the fixed pin plate 14. Then the box cover 8 is rotated under the constraint of the constraint sleeve 5 via the movable shaft 6. The insulation box 3 connected to the sleeve bracket 4 by the connecting piece 7 can be flipped open.

[0025] It also includes support legs 15 and fixed bases 16. The four corners of the bottom of the insulated box 3 are respectively connected to the top side of a set of support legs 15, and the bottom side of each set of support legs 15 is respectively connected to the inner side of the top of a set of fixed bases 16. The fixed bases 16 are fixed to the ground, and the support legs 15 can support the insulated box 3 to improve stability.

[0026] It also includes a bracket 17, a magnet block 18, and a ferromagnetic sheet 19. The inner sides of the two sets of rear support legs 15 are connected to the bottom side of the magnet block 18 via the bracket 17, and the middle and rear side of the top of the box cover 8 is connected to the inner side of the ferromagnetic sheet 19. When the box cover 8 is opened, the ferromagnetic sheet 19 can be attracted to the magnet block 18, and the connection between the bracket 17 and the magnet block 18 can support the opening of the box cover 8, thereby improving stability.

[0027] It also includes an information board 20, with the top front side of the box cover 8 connected to the inside of the information board 20; the information board 20 can display information about the device, making it easier to read and use, and improving convenience.

[0028] It also includes a plastic support lamp post 21, a lampshade 22 and a bulb 23. The right rear side of the insulated box 3 is connected to the outside of the lampshade 22 via the plastic support lamp post 21. The bulb 23 is installed inside the lampshade 22. The lampshade 22 is adjustablely supported by the plastic support lamp post 21, and can be illuminated by the bulb 23. The light is guided by the lampshade 22 to optimize the lighting environment and improve convenience.

[0029] It also includes a storage rack 24, a drawer 25, and a handle 26. The bottom front side of the insulated box 3 is connected to the top side of the storage rack 24. The inner side of the storage rack 24 is longitudinally slidably connected to the outer side of the drawer 25. The front middle of the drawer 25 is connected to the rear side of the handle 26. Spare parts, tools, and other items can be stored in the drawer 25. The handle 26 can be held to push the drawer 25 into the storage rack 24 for protection, increasing the storage function.

[0030] In summary, when using an argon heating device for VAD deposition of optical fiber preform core rods, the argon gas pipeline 1 is heated and controlled in real time during VAD deposition of the optical fiber preform. It is fixed to the ground by a fixed base 16 and supported by legs 15. When the lid 8 is closed, the interior is sealed. Insulation cotton 9 covers the outside of the heating tube 2 for insulation, and the lid 8 is locked by the action of the moving pin bracket 13 and the fixed pin plate 14. When internal maintenance is required, the handle 12 can be turned, causing the pin shaft 11 to rotate under the constraint of the shaft movable sleeve 10. This rotates the moving pin bracket 13 outwards within the fixed pin plate 14, thereby opening the lid 8 via the movable shaft 6. The container rotates under the constraint of the constraint sleeve 5. The insulated box 3, which is connected to the cover 8 by the connecting piece 7 and the bracket 4, can be flipped open. When the cover 8 is open, it can be attracted by the ferromagnetic sheet 19 and the magnet block 18. The cover 8 is supported by the bracket 17 connecting the magnet block 18. In addition, the information board 20 can display the information of this device for easy reading and auxiliary use. The plastic support lamp post 21 can adjust the support of the lampshade 22. The light bulb 23 can provide illumination, and the lampshade 22 guides the light to optimize the lighting environment. Spare parts, tools and other items can be stored in the drawer 25. The handle 26 can be used to push the drawer 25 into the storage rack 24 for protection, increasing the storage function.

[0031] The argon gas pipeline 1, heating tube 2, and bulb 23 are commercially available devices known to those skilled in the art, and are equipped with corresponding control systems to fulfill their functions. Here, we are simply using them without making any structural or functional improvements, and we will not elaborate further.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An argon gas heating device for VAD deposition of optical fiber preform core rods, comprising an argon gas pipe (1) and a heating tube (2), wherein the outer side of the argon gas pipe (1) is sleeved with the inner side of the heating tube (2), characterized in that, It also includes an insulation box (3), a sleeve bracket (4), a constraint sleeve (5), a movable shaft (6), a connecting piece (7), a box cover (8), insulation cotton (9), a shaft movable sleeve (10), a pin shaft (11), a handle (12), a moving pin bracket (13), and a fixed pin piece (14). The argon gas pipeline (1) is longitudinally stacked and fixed inside the insulation box (3) via the heating pipe (2), and both the input and output sides of the argon gas pipeline (1) protrude outwards. The rear side of the top of the insulation box (3) is connected to the bottom side of the constraint sleeve (5) via the sleeve bracket (4), and the inner side of the constraint sleeve (5) is connected to... The movable shaft (6) is rotatably connected to the outside. The front side of the movable shaft (6) is movably connected to the lower rear end of the box cover (8) via the connecting piece (7). The inner side of the box cover (8) is connected with insulation cotton (9). The inner side of the lower middle front end of the box cover (8) is connected to the outer side of the movable shaft sleeve (10). The inner wall of the movable shaft sleeve (10) is rotatably connected to the outer wall of the pin shaft (11). The outer side of the pin shaft (11) is connected to the middle inner side of the handle (12). The inner side of the pin shaft (11) is connected to the upper inner side of the moving pin frame (13). The upper middle front of the top of the insulated box (3) is connected with a fixed pin piece (14).

2. The argon gas heating device for VAD deposition of optical fiber preform core rod according to claim 1, characterized in that: It also includes support legs (15) and fixed bases (16). The four corners of the bottom of the insulated box (3) are respectively connected to the top side of a set of support legs (15), and the bottom side of each set of support legs (15) is respectively connected to the inner side of the top of a set of fixed bases (16).

3. The argon gas heating device for VAD deposition of optical fiber preform core rod according to claim 2, characterized in that: It also includes a bracket (17), a magnet (18) and a ferromagnetic sheet (19). The inner sides of the two sets of rear legs (15) are connected to the bottom side of the magnet (18) via the bracket (17), and the rear side of the top of the box cover (8) is connected to the inner side of the ferromagnetic sheet (19).

4. The argon gas heating device for VAD deposition of optical fiber preform core rod according to claim 1, characterized in that: It also includes an information board (20), the front side of the top of the box cover (8) is connected to the inside of the information board (20).

5. The argon gas heating device for VAD deposition of optical fiber preform core rod according to claim 1, characterized in that: It also includes a plastic support lamp post (21), a lamp cover (22) and a bulb (23). The right rear side of the insulation box (3) is connected to the outside of the lamp cover (22) via the plastic support lamp post (21), and a bulb (23) is installed on the inside of the lamp cover (22).

6. The argon gas heating device for VAD deposition of optical fiber preform core rod according to claim 1, characterized in that: It also includes a storage rack (24), a drawer (25) and a handle (26). The front side of the bottom of the insulated box (3) is connected to the top side of the storage rack (24). The inner side of the storage rack (24) is longitudinally slidably connected to the outer side of the drawer (25). The middle front side of the drawer (25) is connected to the rear side of the handle (26).

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