Light spraying box driving device of OVD deposition equipment

Abstract

The utility model relates to a light spraying box driving device of OVD deposition equipment. The light spraying box driving device comprises a bracket, the spraying lamp box is connected to the support in a sliding mode, and a spraying lamp is arranged on the side, in the first direction, of the spraying lamp box; the driving mechanism assembly comprises a shell and a driving assembly, the driving assembly comprises a servo motor and a lead screw rotationally connected to the interior of the shell, the lead screw extends in the first direction, the servo motor is arranged on the side, away from the blowtorch, of the shell, the lead screw extends out of the shell and is connected with the output end of the servo motor, and the lead screw is connected with the blowtorch box through a nut; the servo motor drives the blow lamp box to move in the first direction, the shell comprises an end cover plate, and the end cover plate is arranged on the side, close to the blow lamp, of the shell in the first direction. The sealing heat insulation piece is arranged in the shell and located between the end cover plate and the lead screw; according to the utility model, accurate lifting of the spray lamp box is realized, the optimal deposition efficiency is ensured, heat radiation on the driving assembly can be reduced, the service life of the driving assembly is prolonged, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber preform manufacturing, in particular to a driving device for a blowtorch box of an OVD deposition device. Background Art

[0002] Optical fiber preforms are key raw materials in the manufacturing process of optical fibers. The common manufacturing process of optical fiber preforms generally includes two steps. First, a core rod for producing optical fiber preforms is manufactured by using a VAD deposition device, a stretching machine docking device, etc. The core rod then undergoes OVD deposition and sintering processes to form the finished optical fiber preform. Therefore, the OVD deposition device plays a key role in producing qualified optical fiber preforms.

[0003] In the manufacturing process, the OVD deposition device horizontally clamps the core rod in the reaction chamber, and the core rod is always in a rotating state. The blowtorch box on the OVD deposition device continuously sprays high-purity gaseous raw materials (usually silicon tetrachloride evaporation raw materials) through a blowtorch. The raw materials chemically react with oxygen and water vapor at high temperatures, and the generated fine silica particles are finally deposited on the core rod through the thermophoretic effect to obtain a loose body of the optical fiber preform. During deposition, as the diameter of the formed loose body continuously increases, to ensure the best deposition efficiency, the distance between the blowtorch nozzle position and the outer surface of the cladding should remain unchanged, that is, as the diameter of the cladding increases, the blowtorch should move accordingly. However, the blowtorch box of the existing OVD deposition device cannot move accurately, cannot ensure the best deposition efficiency, and the driving mechanism of the blowtorch box is close to the reaction chamber and is easily affected by high temperatures and ages, resulting in a high cost of the OVD deposition device. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problems in the prior art that the blowtorch box cannot move accurately and the driving mechanism of the blowtorch box is easily affected by high temperatures and ages, and further provide a driving device for a blowtorch box of an OVD deposition device, which realizes the accurate movement of the blowtorch box, can also reduce the heat aging of the driving components of the blowtorch box, improves the service life of the driving components, and reduces the cost.

[0005] To solve the above technical problems, the utility model provides a driving device for a blowtorch box of an OVD deposition device, including,

[0006] A bracket;

[0007] A blowtorch box, which is slidably connected to the bracket, and a blowtorch is provided on one side of the blowtorch box along the first direction;

[0008] The driving mechanism assembly includes a housing and a driving component. The driving component includes a servo motor and a lead screw rotatably connected inside the housing. The lead screw extends along the first direction. The servo motor is arranged on one side of the housing away from the blowtorch. The lead screw extends out of the housing and is connected to the output end of the servo motor. The lead screw is connected to the blowtorch box through a nut. The servo motor drives the blowtorch box to move along the first direction. The housing includes an end cover plate, and the end cover plate is arranged on one side of the housing along the first direction and close to the blowtorch.

[0009] A sealing and heat-insulating member is arranged inside the housing and between the end cover plate and the lead screw.

[0010] In an embodiment of the present invention, the sealing and heat-insulating member includes a quartz glass cover plate.

[0011] In an embodiment of the present invention, the sealing and heat-insulating member further includes a polytetrafluoroethylene heat-insulating member, and the polytetrafluoroethylene heat-insulating member is located between the quartz glass cover plate and the lead screw.

[0012] In an embodiment of the present invention, the driving component further includes a first bearing seat and a second bearing seat fixedly arranged inside the housing. Two ends of the lead screw are respectively rotatably connected to the first bearing seat and the second bearing seat. Among them, the sealing and heat-insulating member is located between the first bearing seat and the end cover plate.

[0013] In an embodiment of the present invention, it further includes a first bearing seat connecting piece fixedly connected inside the housing. The first bearing seat connecting piece is provided with a receiving groove and a bearing seat cover plate for covering the receiving groove, and the first bearing seat is arranged in the receiving groove.

[0014] In an embodiment of the present invention, the polytetrafluoroethylene heat-insulating member is provided with an installation groove, and the first bearing seat connecting piece is located in the installation groove.

[0015] In an embodiment of the present invention, the driving component further includes a nut connecting piece and a nut connecting piece cover plate. The nut connecting piece and the nut connecting piece cover plate are fixedly connected. The nut connecting piece is sleeved on the nut and fixedly connected to the nut. The nut connecting piece cover plate abuts against one end of the nut connecting piece along the first direction, and the nut connecting piece cover plate is located between the nut connecting piece and the second bearing seat.

[0016] In an embodiment of the present invention, sliding rails extending along the first direction are arranged on both sides of the bracket. Sliders corresponding to the sliding rails are arranged on both sides of the blowtorch box, and the sliders are slidably connected to the sliding rails.

[0017] In an embodiment of the present utility model, a first gear is provided at one end of the lead screw extending out of the housing, a second gear is provided at the output end of the servo motor, and the first gear is meshed and connected with the second gear.

[0018] In an embodiment of the present utility model, an oil injection window and an oil injection window cover plate for closing the oil injection window are provided on one side of the housing along the second direction, and the oil injection window is located on the side of the housing opposite to the side where the blowtorch box is provided.

[0019] The above technical solution of the present utility model has the following beneficial effects compared with the prior art:

[0020] For the blowtorch box driving device of the OVD deposition equipment of the present utility model, by providing a lead screw and a servo motor to drive the blowtorch box, when the servo motor rotates precisely by an angle, the lead screw can rise or fall by a fixed height precisely, thereby precisely controlling the lifting distance of the blowtorch box and ensuring the best deposition efficiency of the loose body of the optical fiber preform; the servo motor is arranged on the side of the housing far from the blowtorch, reducing the heat received by the servo motor from the blowtorch side, which is beneficial to extending the service life of the servo motor and saving the cost of replacing motor components; by providing an end cover plate and a sealing isolation member on the side of the housing close to the blowtorch, the heat at the end of the lead screw and the connection between the end of the lead screw and the housing is reduced, the service life of the end of the lead screw and the connection between the end of the lead screw and the housing is extended, and the cost of replacing components is reduced. Description of the Drawings

[0021] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to the specific embodiments of the present utility model and in conjunction with the drawings, where

[0022] Figure 1 is a schematic structural diagram of an exploded view of the blowtorch box driving device of the OVD deposition equipment in a preferred embodiment of the present utility model.

[0023] Figure 2 For Figure 1 is a schematic structural diagram of an exploded view of the driving components of the blowtorch box driving device of the OVD deposition equipment shown except for the servo motor.

[0024] Figure 3 For Figure 1 is a schematic structural diagram of the blowtorch box driving device of the OVD deposition equipment shown with the blowtorch box at the highest position.

[0025] Figure 4 For Figure 1 is a schematic structural diagram of the blowtorch box driving device of the OVD deposition equipment shown with the blowtorch box at the lowest position.

[0026] Figure 5 For Figure 2Schematic structural diagram of the polytetrafluoroethylene heat insulation part of the shown driving component.

[0027] Figure 6 For Figure 2 Schematic structural diagram of the second bearing seat connecting piece of the shown driving component.

[0028] Explanation of the reference numerals in the drawings of the specification: 1. Blowtorch box; 11. Blowtorch; 2. Bracket; 3. Servo motor; 4. Second gear; 500. Housing; 501. End cover plate; 502. Quartz glass cover plate; 503. Polytetrafluoroethylene heat insulation part; 5031. Installation groove; 504. Bearing seat cover plate; 505. First bearing seat; 506. First bearing seat connecting piece; 5061. Accommodating groove; 507. Connecting plate; 508. Lead screw; 509. Nut connecting piece cover plate; 510. Second bearing seat connecting piece; 511. Second bearing seat; 512. Nut connecting piece; 513. Side plate; 514. Oil filling window cover plate; 515. Nut; 6. Slide block; 7. Slide rail; Z. First direction; Y. Second direction; X. Third direction. Detailed implementation manners

[0029] The following further describes the present utility model in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the illustrated embodiments are not intended to limit the present utility model.

[0030] Embodiment

[0031] Referring to Figure 1 、 2 As shown in FIGS. 2 and 3, in an embodiment of the present utility model, an OVD deposition equipment blowtorch box driving device includes

[0032] A bracket 2, a bottom plate fixedly connected thereto and two vertical plates, and an installation gap is provided between the two vertical plates;

[0033] A blowtorch box 1, which is slidably connected to the bracket 2 and located within the installation gap. A blowtorch 11 is provided on one side of the blowtorch box 1 along the first direction Z, and the first direction Z is the vertical direction. In other embodiments of the present invention, the first direction Z may be the horizontal direction;

[0034] The driving mechanism assembly includes a housing 500 and a driving component both connected to the bottom plate. The housing 500 is made of aluminum alloy. The driving component includes a servo motor 3 and a lead screw 508 rotatably connected at both ends inside the housing 500. The lead screw 508 extends along the first direction Z. The servo motor 3 is arranged on the side of the housing 500 away from the blowtorch 11. The bottom end of the lead screw 508 passes through a through hole at the bottom of the housing 500 and extends out of the housing 500 and is connected to the output end of the servo motor 3. The lead screw 508 is threadedly connected to a nut 515, and the nut 515 is connected to the blowtorch box 1. The servo motor 3 drives the blowtorch box 1 to move up and down along the first direction Z through the lead screw 508 and the nut 515. The housing 500 includes an end cover plate 501. The end cover plate 501 is arranged at the top of the housing 500 along the first direction Z and close to the blowtorch 11. The projection of the end cover plate 501 along the first direction Z is larger than other parts of the housing 500;

[0035] A sealing and heat-insulating member is arranged inside the housing 500 and between the top of the end cover plate 501 and the lead screw 508, for sealing the connection between the end cover plate 501 and other parts of the housing 500, and also for isolating the heat radiation from outside the housing 500 from entering the housing 500.

[0036] In an embodiment of the present invention, referring to Figure 2 as shown, the sealing and heat-insulating member includes a quartz glass cover plate 502, which has good high-temperature resistance and is not easily softened or deformed by heat.

[0037] In an embodiment of the present invention, referring to Figure 2 as shown, the sealing and heat-insulating member further includes a polytetrafluoroethylene heat-insulating member 503. The polytetrafluoroethylene heat-insulating member 503 is used to seal the connection between the end cover plate 501 and other parts of the housing 500. The polytetrafluoroethylene heat-insulating member 503 is made of polytetrafluoroethylene material. Polytetrafluoroethylene not only has a light weight but also has good high-temperature resistance. The polytetrafluoroethylene heat-insulating member 503 is located between the quartz glass cover plate 502 and the lead screw 508.

[0038] In an embodiment of the present invention, referring to Figure 2As shown, in order to reduce the friction between the lead screw 508 and the housing 500, the drive assembly further includes a first bearing seat 505 and a second bearing seat 511 fixedly arranged inside the housing 500. The first bearing seat 505 is arranged at the top of the housing 500, and the second bearing seat 511 is arranged at the bottom of the housing 500. The upper end and the lower end of the lead screw 508 are respectively rotatably connected to the first bearing seat 505 and the second bearing seat 511. Among them, the sealing and heat-insulating member is located between the first bearing seat 505 and the end cover plate 501. The sealing and heat-insulating member can reduce the radiant heat of the blowtorch 11 on the first bearing seat 505 and reduce the risk of heat aging of the first bearing seat 505.

[0039] In an embodiment of the present invention, referring to Figure 2 As shown, it further includes a first bearing seat connecting member 506 and a second bearing seat connecting member 510 fixedly connected inside the housing 500. The first bearing seat connecting member 506 is used to fixedly connect the first bearing seat 505, and the second bearing seat connecting member 510 is used to fixedly connect the second bearing seat 511. Specifically, both the first bearing seat connecting member 506 and the second bearing seat connecting member 510 are provided with a receiving groove 5061 and a bearing seat cover plate 504 for covering the receiving groove 5061. A through hole is provided at the bottom of the receiving groove 5061, and the lead screw 508 passes through the through hole so that the first bearing seat 505 is arranged in the receiving groove 5061 of the first bearing seat connecting member 506. The same applies to the second bearing seat connecting member 510 and the second bearing seat 511, and will not be elaborated here.

[0040] In an embodiment of the present invention, referring to Figure 5 As shown, the polytetrafluoroethylene heat-insulating member 503 is arranged in a block shape and is provided with an installation groove 5031. The first bearing seat connecting member 506 is located in the installation groove 5031 to improve the stability of the first bearing seat connecting member 506.

[0041] In an embodiment of the present invention, referring to Figure 2As shown, the driving assembly further includes a nut connecting member 512 and a nut connecting member cover plate 509. The nut connecting member 512 is connected to the blowtorch box 1 by bolts. The nut connecting member 512 and the nut connecting member cover plate 509 are fixedly connected. Both the nut connecting member 512 and the nut connecting member cover plate 509 are provided with through holes. The nut connecting member 512 is sleeved outside the nut 515 through the through hole and fixedly connected to the nut 515. The nut connecting member cover plate 509 is sleeved on the lead screw 508 through the through hole. The nut connecting member cover plate 509 abuts against one end of the nut connecting member 512 along the first direction Z, and the nut connecting member cover plate 509 is located between the nut connecting member 512 and the second bearing seat 511, that is, the nut connecting member cover plate 509 is located at the bottom of the nut connecting member 512. The nut connecting member 512 and the nut connecting member cover plate 509 are used to jointly wrap the nut 515 to prevent dust from entering the nut 515.

[0042] In an embodiment of the present invention, referring to Figure 1 、 3 and Figure 4 as shown, two slide rails 7 extending along the first direction Z are provided on the vertical plates on both sides of the bracket 2. Four sliders 6 corresponding to the two slide rails 7 are provided on both sides of the blowtorch box 1. The sliders 6 are slidably connected to the slide rails 7. The slide rails 7 are used to improve the stability of the blowtorch box 1 during lifting and reduce friction.

[0043] In an embodiment of the present invention, referring to Figure 1 as shown, one end of the lead screw 508 extending out of the housing 500 is connected with a first gear. The output end of the servo motor 3 is provided with a second gear 4. The first gear is meshed with the second gear 4. The gear tooth ratio of the first gear and the second gear 4 is 1:1.

[0044] In an embodiment of the present invention, referring to Figure 1 and 2 as shown, an oil injection window and an oil injection window cover plate 514 for covering the oil injection window are provided on one side of the housing 500 along the second direction Y. The oil injection window is used to monitor the inside of the housing 500 and perform maintenance on the inside of the housing 500. And the oil injection window is located on the side of the housing 500 opposite to the side where the blowtorch box 1 is provided to avoid the blowtorch box 1; the second direction Y is the horizontal direction.

[0045] In an embodiment of the present invention, referring to Figure 2 as shown, the housing 500 is formed by connecting three side plates 513, an end cover plate 501 and a bottom cover plate. An opening is left on the side of the housing 500 for connecting the blowtorch box 1 to avoid the up and down movement of the blowtorch box 1.

[0046] In an embodiment of the present invention, referring to Figure 2As shown, the first bearing block connector 506 and the second bearing block 511 connector are fixedly connected through a connecting plate 507.

[0047] The working principle of the blowtorch box driving device of the OVD deposition equipment of the present utility model is as follows:

[0048] The blowtorch box 1 is arranged below the mandrel. Initially, the blowtorch box 1 is at the highest position of the bracket 2. As the blowtorch 11 of the blowtorch box 1 continuously sprays high-purity gaseous raw materials, fine silicon dioxide particles are generated and deposited on the mandrel to form a loose body. As the diameter of the loose body continuously increases, according to the rate of increase in the diameter of the loose body, under the control of the servo driver, the servo motor 3 continuously drives the lead screw 508 to rotate. The lead screw 508 drives the blowtorch box 1 to gradually descend from the highest position to the lowest position at the same rate. During the process, the distance between the blowtorch 11 and the outer surface of the cladding of the loose body should remain unchanged, ensuring the best deposition efficiency.

[0049] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the creation of the present utility model.

Claims

1. A blowtorch box driving device for an OVD deposition device, characterized in that: include, Bracket; A blowtorch box, which is slidably connected to the bracket, and a blowtorch is provided on one side of the blowtorch box along the first direction; A driving mechanism assembly, comprising a housing and a driving component, wherein the driving component comprises a servo motor and a screw rod rotatably connected to the inside of the housing, wherein the screw rod extends along the first direction, wherein the servo motor is arranged at a side of the housing away from the blowtorch, wherein the screw rod extends out of the housing and is connected to an output end of the servo motor, wherein the screw rod is connected to the blowtorch box via a nut, wherein the servo motor drives the blowtorch box to move along the first direction, wherein the housing comprises an end cover plate, wherein the end cover plate is arranged at a side of the housing along the first direction and close to the blowtorch; A sealing heat insulating member is arranged inside the shell and located between the end cover plate and the screw rod.

2. The OVD deposition equipment blowtorch box driving device according to claim 1, characterized in that: The sealing and heat-insulating component comprises a quartz glass cover plate.

3. The OVD deposition equipment blowtorch box driving device according to claim 2, characterized in that: The sealing heat insulation component also includes a polytetrafluoroethylene heat insulation component, and the polytetrafluoroethylene heat insulation component is located between the quartz glass cover plate and the screw rod.

4. The OVD deposition equipment blowtorch box driving device according to claim 3, characterized in that: The drive assembly also includes a first bearing seat and a second bearing seat fixedly arranged inside the shell, and the two ends of the screw rod are rotatably connected to the first bearing seat and the second bearing seat respectively, wherein the sealing and heat-insulating component is located between the first bearing seat and the end cover plate.

5. The OVD deposition equipment blowtorch box driving device according to claim 4, characterized in that: It also includes a first bearing seat connecting member fixedly connected to the shell, the first bearing seat connecting member is provided with a receiving groove and a bearing seat cover plate covering the receiving groove, and the first bearing seat is arranged in the receiving groove.

6. The OVD deposition equipment blowtorch box driving device according to claim 4, characterized in that: The polytetrafluoroethylene heat insulation component is provided with a mounting groove, and the first bearing seat connecting component is located in the mounting groove.

7. The OVD deposition equipment blowtorch box driving device according to claim 4, characterized in that: The drive assembly also includes a nut connector and a nut connector cover plate, the nut connector and the nut connector cover plate are fixedly connected, the nut connector is sleeved on the nut and fixedly connected to the nut, the nut connector cover plate abuts against one end of the nut connector along the first direction, and the nut connector cover plate is located between the nut connector and the second bearing seat.

8. The OVD deposition equipment blowtorch box driving device according to claim 1, characterized in that: Slide rails extending along the first direction are arranged on both sides of the bracket, and sliders are arranged on both sides of the blowtorch box corresponding to the slide rails, and the sliders are slidably connected to the slide rails.

9. The OVD deposition equipment blowtorch box driving device according to claim 1, characterized in that: A first gear is disposed at one end of the screw rod extending out of the housing, a second gear is disposed at the output end of the servo motor, and the first gear is meshedly connected with the second gear.

10. The OVD deposition equipment blowtorch box driving device according to claim 1, characterized in that: An oil filling window and an oil filling window cover plate for tightly covering the oil filling window are provided on one side of the shell along the second direction, and the oil filling window is located on a side of the shell opposite to the side where the blowtorch box is provided.

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