An apparatus for cladding deposition in optical fiber preforms

Abstract

This invention discloses a cladding deposition apparatus for optical fiber preform fabrication, characterized by comprising: a moving mechanism including a vehicle body and a driving component mounted on the vehicle body; a deposition mechanism including a base mounted on the vehicle body, a torch mounted on the base, and a connection port mounted on the base; a pipeline support mechanism including an inner shaft mounted on the base and a bracket mounted on the inner shaft; and a positioning mechanism including a rotating ring rotatably mounted on the inner shaft, a clamping arm mounted on the rotating ring, and a protective cover plate connected to the clamping arm. When the moving mechanism moves, it can drive the torch to move along the optical fiber preform, and the bracket limits and supports the raw material pipeline, preventing friction or crushing of the raw material pipeline during the movement of the moving mechanism, thereby improving the stability of the optical fiber preform production process and avoiding problems such as damage to the raw material pipeline affecting production efficiency.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber preform fabrication technology, and in particular to an apparatus for cladding deposition in optical fiber preform fabrication. Background Technology

[0002] External chemical vapor deposition (OVD) is a simple process developed by Corning Incorporated in 1970 and widely applied in 1980 as a technology for fabricating optical fiber preforms. The chemical reaction mechanism of OVD is flame hydrolysis, meaning that the desired core glass composition is obtained by gradually depositing powders of gaseous halides (such as SiCl4) carried in an oxyhydrogen flame or methane flame.

[0003] In the existing technology, in order to move the torch and deposit optical fiber preforms layer by layer, a moving mechanism, such as a tracked vehicle, is used to move the torch linearly back and forth. During the movement, the raw material pipe that supplies the torch with raw materials is easily rubbed against the moving mechanism, or even crushed and damaged by the moving mechanism. Summary of the Invention

[0004] In view of the problem that the raw material pipelines are easily damaged in the existing optical fiber preform preparation cladding deposition equipment, the present invention is proposed.

[0005] Therefore, the purpose of this invention is to provide an apparatus for cladding deposition in optical fiber preform preparation.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an optical fiber preform cladding deposition apparatus, characterized in that it includes: a moving mechanism, including a vehicle body and a driving component disposed on the vehicle body; a deposition mechanism, including a base mounted on the vehicle body, a blowtorch disposed on the base, and a connection port disposed on the base; a pipe support mechanism, including an inner shaft mounted on the base and a bracket mounted on the inner shaft; and a positioning mechanism, including a rotating ring rotatably mounted on the inner shaft, a clamping arm mounted on the rotating ring, and a protective cover plate connected to the clamping arm.

[0007] In a preferred embodiment of the cladding deposition apparatus for optical fiber preform fabrication according to the present invention, the support includes a channel beam, an end plate mounted on the end of the channel beam, and a limiting ring mounted on the inner shaft; the end plate is fixed to the outside of the inner shaft, and the rotating ring is rotatably mounted between the end plate and the limiting ring.

[0008] As a preferred embodiment of the cladding deposition apparatus for optical fiber preform preparation according to the present invention, the clamping arm includes a follower mounted on a rotating ring, a rotating body connected to the follower, and a contact body mounted on the rotating body.

[0009] As a preferred embodiment of the cladding deposition apparatus for optical fiber preform fabrication according to the present invention, it further includes: a connecting mechanism; which further includes: a through rod slidably mounted on the protective cover plate; an abutment head disposed at the end of the through rod; an elastic element sleeved on the outside of the through rod and abutting against the abutment head and the through rod; and a connecting shaft disposed at the end of the through rod and connected to the contact body.

[0010] As a preferred embodiment of the optical fiber preform cladding deposition apparatus of the present invention, the positioning mechanism further includes a locking block located at the end of the support and a limiting member installed on the rotating body.

[0011] As a preferred embodiment of the cladding deposition apparatus for optical fiber preform preparation according to the present invention, wherein: the locking block has a deflection surface, and the locking block is provided with a ratchet group on the deflection surface; the limiting member includes an extension fixed to the follower and a locking tooth installed on the extension.

[0012] As a preferred embodiment of the cladding deposition apparatus for optical fiber preform fabrication according to the present invention, it further includes: an unlocking mechanism; which includes: a collar slidably sleeved on the outside of the inner shaft; a first spring sleeved on the outside of the inner shaft; an abutment plate fixed on the inner shaft; and a mounting arm fixed on the collar; one end of the first spring abuts against the collar, and the other end abuts against the abutment plate.

[0013] As a preferred embodiment of the cladding deposition apparatus for optical fiber preform fabrication according to the present invention, it further includes: an adjustment mechanism mounted on the rotating ring and capable of adjusting the follower; the rotating ring has a mounting groove, a side groove is formed on the side wall of the rotating ring, and an insertion hole is formed in the side groove of the rotating ring; the adjustment mechanism includes: a movable member, which is slidably disposed inside the side groove and connected to the follower; and a pin, which is slidably disposed on the movable member and capable of being inserted into the inside of the insertion hole.

[0014] In a preferred embodiment of the cladding deposition apparatus for optical fiber preform fabrication according to the present invention, a force-bearing column is fixed on the follower; a limiting groove is formed on the moving part, the two ends of the limiting groove being an outer end and an inner end, respectively, and the inner end being biased toward the center of the rotating ring relative to the outer end.

[0015] In a preferred embodiment of the optical fiber preform cladding deposition apparatus of the present invention, an arc groove is formed on the side groove wall of the rotating ring, and a guide block is installed on the moving part; the guide block extends to the inner side of the arc groove.

[0016] The beneficial effects of this invention are as follows: When the moving mechanism moves, it can drive the torch to move along the optical fiber preform. The support bracket limits and supports the raw material pipeline, so that the moving mechanism will not rub or crush the raw material pipeline during the movement, thereby improving the stability of the optical fiber preform production process and avoiding the problem of production efficiency being affected by damage to the raw material pipeline. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0018] Figure 1 This is a schematic diagram of the overall structure of the optical fiber preform preparation cladding deposition apparatus of the present invention.

[0019] Figure 2 This is a schematic diagram of the deposition mechanism described in this invention.

[0020] Figure 3 This is a schematic diagram of the positioning mechanism described in this invention.

[0021] Figure 4 This is a schematic diagram of the clamping arm structure described in this invention.

[0022] Figure 5 This is a schematic diagram of the limiting member and locking block structure described in this invention.

[0023] Figure 6 This is a schematic diagram of the unlocking mechanism described in this invention.

[0024] Figure 7 This is a schematic diagram showing the installation position of the adjustment mechanism described in this invention.

[0025] Figure 8 This is a schematic diagram of the adjustment mechanism described in this invention. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0030] Example 1

[0031] Reference Figure 1 A cladding deposition apparatus for optical fiber preform preparation is provided, including a moving mechanism 100, a vehicle body 101, and a drive component 102 disposed on the vehicle body 101. The entire moving mechanism 100 is a tracked vehicle, and the drive component 102 is the power component and track wheels of the tracked vehicle. The entire moving mechanism 100 is located inside the deposition chamber, and the moving mechanism 100 moves inside the deposition chamber to complete the preparation of the optical fiber preform.

[0032] The deposition mechanism 200 includes a base 201 mounted on the vehicle body 101, a blowtorch 202 mounted on the base 201, and a connection port 203 mounted on the base 201. When the moving mechanism 100 moves, it can drive the base 201 to move synchronously, thereby driving the blowtorch 202 to move synchronously. One end of the connection port 203 is connected to the blowtorch 202 to deliver raw materials to the blowtorch 202. When the moving mechanism 100 moves, it can drive the blowtorch 202 to move along the optical fiber preform to process the optical fiber preform.

[0033] The pipe support mechanism 300 includes an inner shaft 301 mounted on the base 201 and a bracket 302 mounted on the inner shaft 301. The pipe support mechanism 300 is mainly used to support the raw material pipe X. In this embodiment, the inner shaft 301 is mounted on the side of the base 201 and its position corresponds to the position of the connection port 203. The inner shaft 301 supports the entire bracket 302, and the bracket 302 limits and supports the raw material pipe X, so that the moving mechanism 100 will not rub or crush the raw material pipe X during the movement, thereby improving the stability of the optical fiber preform production process and avoiding the problem of production efficiency being affected by damage to the raw material pipe X.

[0034] The positioning mechanism 400 includes a rotating ring 401 rotatably mounted on the inner shaft 301, a clamping arm 402 mounted on the rotating ring 401, and a protective cover plate 403 connected to the clamping arm 402. Multiple raw material pipes X can be placed on the support 302. Through the positioning mechanism 400, the raw material pipes X can be positioned on the support 302, and the protective cover plate 403 can cover the raw material pipes X to prevent the outside of the raw material pipes X from being deposited and causing problems that are difficult to clean.

[0035] Specifically, the bracket 302 includes a channel beam 302a, an end plate 302b installed at the end of the channel beam 302a, and a limiting ring 302c installed on the inner shaft 301; the end plate 302b is fixed to the outside of the inner shaft 301, and the rotating ring 401 is rotatably installed between the end plate 302b and the limiting ring 302c.

[0036] The channel beam 302a has a pipe groove, and the raw material pipe X can be placed inside the pipe groove. In order to adapt to different production environments, the number of channel beams 302a can be determined according to the number of raw material pipes X that need to be placed. In this embodiment, there are four channel beams 302a and two end plates 302b, which are respectively installed at the ends of the four channel beams 302a. The function of the limiting ring 302c is to limit the rotating ring 401, so that the rotating ring 401 can rotate outside the inner shaft 301 but cannot move. When the rotating ring 401 rotates clockwise, it can drive the clamping arm 402 to move, pressing the raw material pipe X against the inside of the channel beam 302a.

[0037] Furthermore, the clamping arm 402 includes a follower 402a mounted on the rotating ring 401, a rotating body 402b connected to the follower 402a, and a contact body 402c mounted on the rotating body 402b.

[0038] When the rotating ring 401 rotates clockwise, it can drive the follower 402a to rotate clockwise, and at the same time drive the rotating body 402b to rotate clockwise, so that the contact body 402c can contact the raw material pipe X and press the raw material pipe X against the inside of the pipe groove. In this embodiment, in order to position the four raw material pipes X inside the four groove beams 302a, four clamping arms 402 are also used to position the raw material pipes X inside the four groove beams 302a respectively.

[0039] Operation process: When the moving mechanism 100 moves, it can drive the base platform 201 to move synchronously, thereby driving the torch 202 to move synchronously. One end of the connection port 203 is connected to the torch 202, and the raw material is transported to the torch 202. When the moving mechanism 100 moves, it can drive the torch 202 to move along the optical fiber preform. The support 302 limits and supports the raw material pipeline X, so that the moving mechanism 100 will not rub or crush the raw material pipeline X during the movement, thereby improving the stability of the optical fiber preform production process and avoiding the problem of production efficiency being affected by damage to the raw material pipeline X.

[0040] Example 2

[0041] Reference Figure 2 This embodiment differs from the first embodiment in that, in order to drive the anti-slip cover to rotate synchronously when the clamping arm 402 rotates clockwise, the device also includes a connecting mechanism 500; it further includes a through rod 501, which is slidably mounted on the protective cover 403; an abutment head 502, which is located at the end of the through rod 501; an elastic member 503, which is sleeved on the outside of the through rod 501 and abuts against the abutment head 502 and the through rod 501; and a connecting shaft 504, which is located at the end of the through rod 501 and connected to the contact body 402c.

[0042] The protective cover 403 is arc-shaped, and the end plate 302b is circular. The inner arc surface of the protective cover 403 fits against the end plate 302b. The pipe groove of the channel beam 302a has a groove 302a-1, which faces away from the center of the circle away from the end plate 302b. When the raw material pipe X is placed inside the pipe groove, the protective cover 403 does not block the groove 302a-1, and the clamping arm 402 and the groove 302a-1 are misaligned. After the raw material pipe X is placed... Rotating the rotating ring 401 clockwise causes the clamping arm 402 to reach the contact body 402c of the clamping arm 402, pressing the raw material pipe X against the inside of the pipe groove. At the same time, it drives the anti-slip cover plate to reach the groove 302a-1 and seal the groove 302a-1. While positioning the raw material pipe X, the protective cover plate 403 can seal the groove 302a-1, thereby reducing the occurrence of severe sedimentation on the outside of the raw material pipe X.

[0043] Specifically, the positioning mechanism 400 also includes a locking block 404 located at the end of the bracket 302, and a limiting member 405 mounted on the rotating body 402b.

[0044] When the rotating ring 401 rotates clockwise, it drives the follower 402a to rotate. The follower 402a drives the rotating body 402b to rotate, which in turn drives the contact body 402c to rotate, so that the contact body 402c reaches the slot 302a-1 position. At the same time, the clockwise rotation of the rotating body 402b can drive the limiting member 405 to approach the locking block 404. When the locking block 404 abuts against the limiting member 405, the rotating body 402b can only rotate clockwise and cannot rotate counterclockwise. When the rotating body 402b drives the contact body 402c to rotate clockwise and abut against the raw material pipeline X, the locking block 404 and the limiting member 405 can prevent the rotating body 402b from rotating counterclockwise, so that the rotating body 402b is positioned and the contact body 402c can be stably positioned in the raw material pipeline X.

[0045] Furthermore, the locking block 404 has a biasing surface 404a, and the locking block 404 is provided with a ratchet set 404b on the biasing surface 404a; the limiting member 405 includes an extension body 405a fixed on the follower body 402a, and a locking tooth 405b installed on the extension body 405a.

[0046] The end of the bias surface 404a closest to the corresponding groove beam 302a is biased towards the center of the rotating ring 401, which is the near end 404a-1. The end of the bias surface 404a furthest from the corresponding groove beam 302a is furthest from the center of the rotating ring 401, which is the far end 404a-2. When the rotating body 402b drives the limiting member 405 to rotate clockwise, the locking tooth 405b starts to abut against the locking block 404 from the far end 404a-2. As the rotating body 402b continues to rotate, the limiting member 405 applies pressure to the rotating body 402b in the direction of the center of the rotating ring 401 under the abutment of the bias surface 404a, so that the rotating body 402b drives the contact body 402c to move in the direction of the center. During this process, the contact body 402c drives the through rod 501 to move in the direction of the center of the rotating ring 401 through the connecting shaft 504, so that the contact head 502 presses the elastic member 503, thereby causing the elastic member 503 to deform.

[0047] At the same time, the contact body 402c moves towards the center of the rotating ring 401, which can bring the raw material pipe X into contact with the inside of the pipe groove.

[0048] In this embodiment, the rotating body 402b and the follower body 402a are connected by a groove and a slider. The elastic element 503 can be a spring, preferably a flexible material with elasticity. It has two functions: first, it transmits force to the locking tooth 405b through the contact head 502, the through rod 501, the connecting shaft 504, the contact body 402c, the rotating body 402b, and the extension body 405a, so that the locking tooth 405b can press against the bias surface 404a; second, when the limiting member 405 is not under force, it can push the through rod 501, thereby driving the contact body 402c and the rotating body 402b to reset and remain in place.

[0049] The rest of the structure is the same as in Example 1.

[0050] Example 3

[0051] Reference Figure 2 This embodiment differs from the previous embodiments in that, in order to release the positioning of the raw material pipeline X, it also includes an unlocking mechanism 600; which includes a collar 601, which is slidably sleeved on the outside of the inner shaft 301; a first spring 602, which is sleeved on the outside of the inner shaft 301; an abutment plate 603, which is fixed on the inner shaft 301; and a mounting arm 604, which is fixed on the collar 601; one end of the first spring 602 abuts against the collar 601, and the other end abuts against the abutment plate 603, and a locking block 404 is mounted on the mounting arm 604.

[0052] The collar 601 is slidably but not rotatably fitted onto the outer side of the inner shaft 301. In its natural state, the first spring 602 pushes the collar 601, causing the collar 601 to abut against the end plate 302b, so that the position of the locking block 404 corresponds to the position of the limiting member 405. At this time, the limiting body rotates counterclockwise, and the locking teeth 405b can contact the locking block 404. When unlocking is required, the collar 601 can be pushed away from the end plate 302b. The collar 601 drives the locking block 404, causing the locking teeth 405b and the locking block 404 to separate, thereby unlocking the rotating body 402b and the contact body 402c.

[0053] In this embodiment, there are four mounting arms 604, and four locking blocks 404 are respectively mounted on the four mounting arms 604. Therefore, when unlocking is performed by moving the collar 601, all four rotating bodies 402b and contact bodies 402c can be unlocked simultaneously.

[0054] The rest of the structure is the same as in Example 2.

[0055] Example 4

[0056] Reference Figure 2 This embodiment differs from the previous embodiments in that: during daily use, when it is necessary to disassemble the raw material pipe X, it is often not necessary to disassemble all the raw material pipes X. In order to disassemble the raw material pipe X that needs to be repaired individually during maintenance, this device also includes an adjustment mechanism 700 installed on the rotating ring 401 to adjust the follower 402a. The rotating ring 401 has a mounting groove 401a, a side groove 401b on its side wall, and an insertion hole 401c on the rotating ring 401 in the side groove 401b. The adjustment mechanism 700 includes a moving member 701, which is slidably disposed on the inner side of the side groove 401b and connected to the follower 402a; and a pin 702, which is slidably disposed on the moving member 701 and can be inserted into the inner side of the insertion hole 401c.

[0057] The mounting groove 401a is designed to allow the follower 402a and the rotating ring 401 to slide together. The end of the follower 402a is mounted on the inner side of the mounting groove 401a via a slider and a sliding groove structure. The side groove 401b is designed to mount the moving part 701. By moving the moving part 701, the position of the corresponding follower 402a is adjusted. By adjusting the position of the follower 402a, the rotating part 402b and the limiting part 405 can be moved closer to the center of the rotating ring 401, thereby disengaging the locking teeth 405b and the locking block 404, and allowing the corresponding clamping arm 402 to contact the positioning of the corresponding raw material pipe X. The pin 702 is designed to ensure the stability of the moving part 701. The pin 702 is inserted into the inner side of the insertion hole 401c to prevent the moving part 701 from moving on its own, thus ensuring that the clamping arm 402 is stably positioned to position the raw material pipe X.

[0058] Specifically, a force-bearing column 402a-1 is fixed on the follower 402a; a limiting groove 701a is provided on the moving part 701, with the two ends of the limiting groove 701a being the outer end 701a-1 and the inner end 701a-2, respectively, and the inner end 701a-2 being biased towards the center of the rotating ring 401 relative to the outer end 701a-1.

[0059] When the raw material pipeline X is positioned, the force-bearing column 402a-1 is located inside the outer end 701a-1, making the follower far from the center of the rotating ring 401. At this time, the pin 702 is inserted into the inner side of the socket 401c, which can maintain the position of the moving part 701. When unlocking is required, the pin 702 can be pulled out from the inner side of the socket 401c, allowing the moving part 701 to move. This pushes the moving part 701 to move inside the side groove 401b, so that the position of the force-bearing column 402a-1 and the inner end 701a-2... Corresponding to the position, under the push of the limiting groove 701a, the follower moves towards the center of the rotating ring 401 until it can pull the rotating part, so that the rotating part moves a small distance towards the center of the rotating ring 401. During this process, the contact part pulls the through rod 501, so that the abutment head 502 presses the elastic part 503 to produce a small deformation, and finally the locking teeth 405b of the limiting part 405 and the locking block 404 are disengaged. At this time, the clamping arm 402 can rotate and disengage from the raw material pipe X, and the limiting part 405 can also rotate and disengage from the locking block 404.

[0060] Furthermore, the rotating ring 401 has an arc groove 401d formed on the groove wall of the side groove 401b, and a guide block is installed on the moving part 701; the guide block extends to the inner side of the arc groove 401d.

[0061] The side groove 401b is arc-shaped, and the arc groove 401d is opened along the inner wall of the side groove 401b. The guide block extends to the inner side of the arc groove 401d, and the moving block is also arc-shaped. This allows the moving part 701 to move inside the side groove 401b, but it will not detach from the inner side of the side groove 401b.

[0062] The rest of the structure is the same as in Example 3.

[0063] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0064] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0065] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0066] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A cladding deposition apparatus for optical fiber preform manufacturing, characterized by: The utility model relates to a kind of pipe positioning device, including, Mobile mechanism (100), including car body (101), and drive component (102) on the car body (101); Deposition mechanism (200), including mounting on the car body (101) base table (201), set up on the base table (201) blowtorch (202), and set up on the base table (201) connecting port (203); Pipe support mechanism (300), including mounting on the base table (201) inner shaft (301), and mounting on the inner shaft (301) support (302); Positioning mechanism (400), including rotation mounting on the inner shaft (301) swivel (401), mounting on the swivel (401) clamping arm (402), and with the clamping arm (402) connected protective cover plate (403); The support (302) includes groove beam (302a), end plate (302b) mounted on the end of the groove beam (302a), and limit ring (302c) mounted on the inner shaft (301); The end plate (302b) is fixed to the outer side of inner shaft (301), and the swivel (401) is rotationally mounted between the end plate (302b) and the limit ring (302c); The groove beam (302a) has a pipe groove.

2. The optical fiber preform manufacturing cladding deposition apparatus of claim 1, wherein: The clamping arm (402) includes a follower (402a) mounted on the swivel (401), a rotating body (402b) connected to the follower (402a), and a contact body (402c) mounted on the rotating body (402b).

3. The optical fiber preform manufacturing cladding deposition apparatus of claim 2, wherein: Further comprising a connecting mechanism (500), which further comprises, A through rod (501) is slidably mounted on the protective cover plate (403); A contact head (502) is provided at the end of the through rod (501); A resilient member (503) is sleeved on the outer side of the through rod (501) and in contact with the contact head (502) and the through rod (501); A connecting shaft (504) is provided at the end of the through rod (501) and connected to the contact body (402c).

4. The optical fiber preform manufacturing cladding deposition apparatus of claim 3, wherein: The positioning mechanism (400) further comprises a locking block (404) at the end of the support (302), and a limiting member (405) mounted on the rotating body (402b).

5. The optical fiber preform manufacturing cladding deposition apparatus of claim 4, wherein: The locking block (404) has a biasing surface (404a), and the locking block (404) is provided with a ratchet set (404b) on the biasing surface (404a); The limiting member (405) includes an extension body (405a) fixed to the follower (402a), and a clamping tooth (405b) mounted on the extension body (405a).

6. The optical fiber preform manufacturing cladding deposition apparatus of claim 4 or 5, wherein: Further comprising an unlocking mechanism (600); It includes, A sleeve ring (601) is slidably sleeved on the outer side of the inner shaft (301); A first spring (602) is sleeved on the outer side of the inner shaft (301); A contact plate (603) is fixed to the inner shaft (301); A mounting arm (604) is fixed to the sleeve ring (601); One end of the first spring (602) is in contact with the collar (601), and the other end is in contact with the abutting plate (603).

7. The optical fiber preform manufacturing cladding deposition apparatus of claim 6, wherein: Further comprising an adjusting mechanism (700) installed on the swivel (401) to adjust the follower (402a), the swivel (401) is provided with an installation slot (401a), the sidewall of the swivel (401) is provided with a side slot (401b), and the swivel (401) is provided with a jack (401c) on the side slot (401b); the adjusting mechanism (700) comprises, A moving part (701) is slidably arranged on the inner side of the side slot (401b) and connected with the follower (402a); A jack (702) is slidably arranged on the moving part (701) and can be inserted into the inner side of the jack (401c).

8. The optical fiber preform manufacturing cladding deposition apparatus of claim 7, wherein: The follower (402a) is fixed with a force column (402a-1); The moving part (701) is provided with a limiting slot (701a), and the two ends of the limiting slot (701a) are respectively a partial outer end (701a-1) and a partial inner end (701a-2), and the partial inner end (701a-2) is deviated from the partial outer end (701a-1) to the center of the swivel (401).

9. The optical fiber preform manufacturing cladding deposition apparatus of claim 7 or 8, wherein: The swivel (401) is provided with a circular arc slot (401d) on the slot wall of the side slot (401b), and the moving part (701) is provided with a guide block; The guide block extends to the inner side of the circular arc slot (401d).

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