CN215440226U - VAD (vapor deposition) argon heating device for optical fiber preform core rod - Google Patents
VAD (vapor deposition) argon heating device for optical fiber preform core rod Download PDFInfo
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- CN215440226U CN215440226U CN202120347406.2U CN202120347406U CN215440226U CN 215440226 U CN215440226 U CN 215440226U CN 202120347406 U CN202120347406 U CN 202120347406U CN 215440226 U CN215440226 U CN 215440226U
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- heating
- pipeline
- argon gas
- gas pipeline
- temperature
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 98
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 229910052786 argon Inorganic materials 0.000 title claims abstract description 48
- 239000013307 optical fiber Substances 0.000 title claims abstract description 23
- 238000007740 vapor deposition Methods 0.000 title abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 37
- 239000010410 layer Substances 0.000 claims description 20
- 239000003365 glass fiber Substances 0.000 claims description 10
- 239000004964 aerogel Substances 0.000 claims description 8
- 229920001971 elastomer Polymers 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 7
- 239000011241 protective layer Substances 0.000 claims description 5
- 229920002379 silicone rubber Polymers 0.000 claims description 5
- 238000009529 body temperature measurement Methods 0.000 abstract description 8
- 230000003287 optical effect Effects 0.000 abstract description 6
- 238000005253 cladding Methods 0.000 abstract description 5
- 238000004321 preservation Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 11
- 229910052732 germanium Inorganic materials 0.000 description 6
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 6
- 238000000151 deposition Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000008021 deposition Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 239000004945 silicone rubber Substances 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 238000012681 fiber drawing Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000006257 total synthesis reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The utility model discloses a VAD (vapor deposition) argon heating device for an optical fiber preform core rod, which has the technical scheme main points that: include argon gas pipeline and be used for argon gas pipeline's pipeline heating band, the cladding of pipeline heating band is in on argon gas pipeline's the circumference surface, pipeline heating band's fixed mounting has the heating band to keep warm to press from both sides the cover on the surface, the both sides surface that the heating band kept warm to press from both sides the cover is fixedly connected with first ferrule and second ferrule respectively, first ferrule with the equal suit of second ferrule is in on argon gas pipeline's the upper surface, first ferrule with the structure of second ferrule is the same, the heating band keeps warm to press from both sides the cover on the surface fixed mounting have temperature measurement sensor, and control argon gas pipeline maintains in a stable temperature, realizes the closed-loop control of temperature through temperature measurement sensor temperature measurement and accuse temperature heating to the heating temperature of accurate control pipeline can solve the unqualified problem of optical property of optical fiber perform finished product stick originally.
Description
Technical Field
The utility model relates to the technical field of preparation of optical fiber preforms, in particular to a VAD (vapor deposition) argon heating device for a core rod of an optical fiber preform.
Background
The optical fiber prefabricated rod is the most main and key raw material in the optical fiber drawing process and consists of a core rod and an outer cladding layer. At present, the manufacturing of the optical fiber preform can be realized by a total synthesis process method, namely a VAD + OVD combined production process, wherein the VAD process is mainly used for producing a core rod, and the OVD process is used for depositing an outer cladding layer on the surface of the core rod to efficiently produce the optical fiber preform. The method is mainly manufactured by the following process steps: (1) an optical fiber preform of a desired diameter and length is deposited by VAD (axial vapor deposition). (2) And dehydrating and sintering the optical fiber preform. (3) And cutting and connecting the rod after the test is qualified. (4) Carrying out full run-out test on the connected prefabricated rod, testing the prefabricated rod meeting the process requirements, clamping the prefabricated rod on stretching equipment, stretching the prefabricated rod into prefabricated core rods with different diameters according to the OVD process requirements, (5) transporting the stretched prefabricated core rods to a cutting machine tool again, cutting the prefabricated core rods into core rods with certain length according to the OVD process requirements, (6) transporting the cut core rods to an oxyhydrogen flame rod connecting machine tool or a plasma machine tool, and welding the cut core rods and a tail rod together to form a complete prefabricated core rod required by OVD deposition; (7) carrying out full jump test on the complete prefabricated core rod, transporting the prefabricated core rod meeting the process requirements to an acid pickling room with the cleanliness of 5 thousand-level requirements, carrying out an acid pickling process, and (8) after the acid pickling process of the core rod is completed, transporting the prefabricated core rod back to an OVD (over-the-counter) deposition workshop, and supplying the prefabricated core rod to OVD deposition equipment for use. The VAD deposits the evaporation mode of core layer germanium material and adopts the bubbling method, and the vaporized germanium material is brought into the core lamp to burn through introducing argon gas into the germanium evaporating pot, so the temperature of the introduced argon gas must be stable, otherwise the flow and pressure of the actual germanium material are difficult to control. Therefore, when the VAD of the optical fiber perform performs real-time heating control on the argon pipeline, the temperature of the argon introduced into the germanium material evaporation tank is controlled, so that the flow and the pressure of the germanium material are stably and accurately controlled, the optical characteristics of the optical fiber perform are stable, and unnecessary mandril scrapping is avoided.
In the prior art, when the argon pipeline is heated, the heat preservation effect is poor, and the heating temperature cannot be accurately controlled, so that the optical performance of the finished optical fiber preform rod is unqualified.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an argon heating device for VAD deposition of an optical fiber preform core rod, which solves the problems in the prior art.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides an optical fiber perform plug VAD deposit argon gas heating device, includes the argon gas pipeline and is used for the pipeline heating area of argon gas pipeline, the cladding of pipeline heating area is in on the circumference surface of argon gas pipeline, the fixed mounting on the surface of pipeline heating area has the heating area to keep warm to press from both sides the cover, the both sides surface that the heating area kept warm to press from both sides the cover is fixedly connected with first ferrule and second ferrule respectively, first ferrule with the second ferrule all the suit is in on the upper surface of argon gas pipeline, first ferrule with the structure of second ferrule is the same, the fixed mounting on the surface that the heating area kept warm to press from both sides the cover has the temperature measurement sensor, one side of argon gas pipeline is equipped with the terminal box, install two backup pads in the terminal box, be equipped with temperature control meter, circuit breaker, solid-state relay and temperature sensor in the terminal box respectively, temperature control meter, The circuit breaker solid-state relay with temperature sensor all fixed mounting is two in the backup pad.
Preferably, the pipeline heating belt is a silicone rubber pipeline heating belt, and a plurality of resistance heating wires distributed at equal intervals are inlaid in the pipeline heating belt.
Preferably, the circuit breaker pass through the wire with temperature control table electric connection, temperature control table pass through the wire with solid state relay electric connection, solid state relay pass through the wire with pipeline heating area electric connection.
Preferably, the first pipe hoop comprises an arc-shaped clamping piece, a vertical connecting part and a fixing screw, the arc-shaped clamping piece and the vertical connecting part are integrally formed, and the fixing screw is fixedly connected with the vertical connecting part.
Preferably, the lower surface of the arc-shaped clamping piece is connected with a rubber pad, and the rubber pad is coated on the circumferential surface of the argon gas pipeline.
Preferably, one side of the vertical connecting part is provided with an annular spring gasket, and the annular spring gasket is sleeved on the fixing screw.
Preferably, the heating belt heat-insulating jacket comprises an outer protective layer, a glass fiber heat-insulating layer and an aerogel felt layer, the outer protective layer is fixedly connected to the upper end of the glass fiber heat-insulating layer, and the aerogel felt layer is fixedly arranged at the lower end of the glass fiber heat-insulating layer.
Preferably, the outer side surface of the junction box is fixedly provided with a T-shaped block, the junction box is provided with a mounting seat, a T-shaped groove is formed in the mounting seat, and the T-shaped block is slidably mounted in the T-shaped groove.
Preferably, one side of the junction box is hinged with a switch door, and a visible window is arranged on the switch door.
Preferably, the inner wall of the junction box is provided with a plurality of guide grooves, and the support plate is slidably mounted in the guide grooves.
Compared with the prior art, the utility model has the beneficial effects that:
in the VAD (vapor deposition) argon heating device for the optical fiber preform core rod, a temperature control meter is started by power transmission of a circuit breaker, parameters of the temperature control meter are set, a solid-state relay is started, a signal is transmitted to the solid-state relay by adjusting the target temperature on the temperature control meter, the solid-state relay controls the opening and closing of a pipeline heating belt, the temperature is lower than the target temperature, and heating is started; when the temperature reaches the target temperature, the heating is closed; from this control argon gas pipeline maintains in a stable temperature, through temperature measurement sensor temperature measurement and the closed-loop control that the temperature was realized in the accuse temperature heating to the heating temperature of accurate control pipeline can solve the unqualified problem of optical fiber perform finished product stick optical property originally, and the heat preservation jacket is held through the heat band heat preservation that is equipped with, and the heat preservation time after effectual improvement pipeline heat band heating improves the heat preservation effect.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a second schematic structural diagram of the present invention;
FIG. 3 is a third schematic structural diagram of the present invention;
FIG. 4 is a structural cross-sectional view of the present invention;
FIG. 5 is an enlarged view taken at A in FIG. 1;
FIG. 6 is a main circuit control diagram;
FIG. 7 is a wiring diagram of a temperature control meter.
In the figure: 1. an argon gas pipeline; 2. a pipeline heating zone; 3. heating the belt with a heat-preserving jacket; 31. an outer protective layer; 32. a fiberglass insulation layer; 33. an aerogel blanket; 4. a first pipe clamp; 41. an arc-shaped clamping piece; 42. a vertical connecting portion; 43. a set screw; 5. a second pipe clamp; 6. a temperature measuring sensor; 7. a junction box; 8. a temperature control meter; 9. a circuit breaker; 10. a solid state relay; 11. a temperature sensor; 12. a support plate; 13. resistance heating wires; 14. a rubber pad; 15. an annular spring washer; 16. a T-shaped block; 17. a mounting seat; 18. a T-shaped groove; 19. opening and closing the door; 20. a visible window; 21. a guide groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, the present invention provides a VAD deposited argon heating device for an optical fiber preform core rod, wherein the technical scheme is as follows:
the argon gas pipeline comprises an argon gas pipeline 1 and a pipeline heating belt 2 used for the argon gas pipeline 1, wherein the pipeline heating belt 2 is coated on the circumferential surface of the argon gas pipeline 1, a heating belt heat-insulating jacket 3 is fixedly installed on the surface of the pipeline heating belt 2, the surfaces of the two sides of the heating belt heat-insulating jacket 3 are respectively and fixedly connected with a first pipe hoop 4 and a second pipe hoop 5, the first pipe hoop 4 and the second pipe hoop 5 are sleeved on the upper surface of the argon gas pipeline 1, the first pipe hoop 4 and the second pipe hoop 5 are identical in structure, a temperature sensor 6 is fixedly installed on the surface of the heating belt heat-insulating jacket 3, a junction box 7 is arranged on one side of the argon gas pipeline 1, two support plates 12 are installed in the junction box 7, a temperature control meter 8, a circuit breaker 9, a solid-state relay 10 and a temperature sensor 11 are respectively arranged in the junction box 7, the temperature control meter 8, the circuit breaker 9, the solid-state relay 10 and the temperature sensor 11 are all fixedly installed on the two support plates 12, the temperature control meter 8 is powered on through the breaker 9, parameters of the temperature control meter 8 are set, the solid-state relay 10 is started, signals are transmitted to the solid-state relay 10 by adjusting the target temperature on the temperature control meter 8, the solid-state relay 10 controls the pipeline heating belt to be opened and closed, the temperature is lower than the target temperature, and heating is started; when the temperature reaches the target temperature, the heating is closed; therefore, the argon pipeline 1 is controlled to be maintained at a stable temperature, the temperature is measured by the temperature measuring sensor 6 and the temperature is controlled to be heated to realize closed-loop control of the temperature, thereby accurately controlling the heating temperature of the pipeline, the problem that the optical performance of the original optical fiber perform finished rod is unqualified can be solved, the heat preservation time of the pipeline heating belt 2 after being heated is effectively improved by the arranged heating belt heat preservation jacket 3, the heat preservation effect is improved, the pipeline heating belt 2 and the heating belt heat preservation jacket 3 are effectively and fixedly arranged on the argon pipeline 1 by the first pipe hoop 4 and the second pipe hoop 5 to prevent falling off, the temperature measuring sensor 6 is the prior art, the temperature measuring sensor with the model of PT100 is adopted, the temperature sensor 11 is the prior art, the model of MH150 temperature sensor 11 is adopted, the temperature control meter 8 is the prior art, the model of 900 FB temperature control meter 8 is adopted, the circuit breaker 9 is the prior art, and the model of LW36126 circuit breaker is adopted, the solid state relay 10 is a prior art solid state relay of model JGJ 12.
In this embodiment, it is preferred, pipeline heating band 2 is the silicone rubber pipeline heating band, and 2 inside inlays of pipeline heating band have a plurality of equidistance resistance heating wire 13 that distribute, and the elasticity of silicone rubber pipeline heating band is better, and is high temperature resistant, and the gas permeability of silicon rubber is conveniently heated well, inlays through inside that resistance heating wire 13 that has a plurality of equidistance to distribute is favorable to improving the homogeneity of heating.
In this embodiment, preferably, the circuit breaker 9 is electrically connected with the temperature control meter 8 through a wire, the temperature control meter 8 is electrically connected with the solid-state relay 10 through a wire, the solid-state relay 10 is electrically connected with the pipeline heating belt 2 through a wire, the circuit breaker 9 is conveniently connected with the temperature control meter 8 through a wire and controls the use of the temperature control meter 8, the temperature control meter 8 is electrically connected with the solid-state relay 10 through a wire, the target temperature on the temperature control meter 8 is adjusted, the signal is transmitted to the solid-state relay 10, and the solid-state relay 10 controls the pipeline heating belt to be opened and closed.
In this embodiment, preferably, the first pipe hoop 4 includes an arc clamping piece 41, a vertical connecting portion 42 and a fixing screw 43, the arc clamping piece 41 and the vertical connecting portion 42 are integrally formed, the fixing screw 43 and the vertical connecting portion 42 are fixedly connected, the arc clamping piece 41 and the vertical connecting portion 42 are integrally formed, the structural strength is improved, and the fixing screw 43 is convenient for the vertical connecting portion 42 to be fixed.
In this embodiment, it is preferred, be connected with rubber pad 14 on the lower surface of arc fastener 41, the rubber pad 14 cladding is on the circumference surface of argon gas pipeline 1, and the rubber pad 14 texture of connecting on the lower surface of arc fastener 41 is softer, and laminating that can be better prevents that arc fastener 41 from protecting the surface to argon gas pipeline 1, prevents to receive the damage.
In this embodiment, preferably, one side of the vertical connecting portion 42 is provided with the annular spring gasket 15, the annular spring gasket 15 is sleeved on the fixing screw 43, and one side of the vertical connecting portion 42 is provided with the annular spring gasket 15, so that the firmness of connection of the fixing screw 43 is improved, the cost is low, and the installation is convenient.
In this embodiment, it is preferred, heating zone heat preservation jacket 3 includes outward appearance inoxidizing coating 31, the cold-proof layer 32 of glass fiber and aerogel felt layer 33, outward appearance inoxidizing coating 31 fixed connection is in the upper end of the cold-proof layer 32 of glass fiber, aerogel felt layer 33 fixed mounting is at the lower extreme of the cold-proof layer 32 of glass fiber, the outward appearance inoxidizing coating 31 that is equipped with is favorable to improving the barrier propterty that heating zone heat preservation jacket 3, it damages to reduce heating zone heat preservation jacket 3, the cold-proof layer 32 of glass fiber and the aerogel felt layer 33 that are equipped with all have better thermal insulation performance, the effectual heat preservation effect that improves heating zone heat preservation jacket 3.
In this embodiment, preferably, a T-shaped block 16 is fixedly mounted on the outer side surface of the junction box 7, the junction box 7 is provided with a mounting seat 17, a T-shaped groove 18 is formed in the mounting seat 17, the T-shaped block 16 is slidably mounted in the T-shaped groove 18, the T-shaped block 16 is fixedly mounted on the outer side surface of the junction box 7, and the T-shaped groove 18 formed in the mounting seat 17 is matched with the T-shaped block 16, so that the junction box 7 is conveniently mounted on the mounting seat 17.
In this embodiment, preferably, one side of the junction box 7 is hinged with a switch door 19, the switch door 19 is provided with a visible window 20, and the hinged switch door 19 is beneficial to protecting internal equipment from being damaged and is beneficial to the working state of the internal equipment in the visible window 20.
In this embodiment, preferably, the inner wall of the junction box 7 is provided with a plurality of guide grooves 21, the support plate 12 is slidably mounted in the guide grooves 21, and the inner wall of the junction box 7 is provided with a plurality of guide grooves 21, so that the support plate 12 is slidably mounted, the detachment is convenient, and the space occupation rate of the junction box 7 is improved.
The working principle and the using process of the utility model are as follows:
the temperature control meter 8 is powered on through the breaker 9, parameters of the temperature control meter 8 are set, the solid-state relay 10 is started, signals are transmitted to the solid-state relay 10 by adjusting the target temperature on the temperature control meter 8, the solid-state relay 10 controls the pipeline heating belt to be opened and closed, the temperature is lower than the target temperature, and heating is started; when the temperature reaches the target temperature, the heating is closed; from this control argon gas pipeline 1 maintains in a stable temperature, realize the closed-loop control of temperature through temperature measurement sensor 6 temperature measurement and accuse temperature heating, thereby the heating temperature of accurate control pipeline, can solve the unqualified problem of optical fiber perform finished product stick optical property originally, it presss from both sides cover 3 to keep warm through the heating band heat preservation that is equipped with, the heat retaining time after the heating of 2 effectual improvement pipeline heating bands, improve the heat preservation effect, through first ferrule 4 and 5 effectual with pipeline heating band 2 and the heating band heat preservation press from both sides cover 3 fixed mounting and prevent to drop on argon gas pipeline 1 of second ferrule.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an optical fiber perform plug VAD deposits argon gas heating device, includes argon gas pipeline (1) and is used for pipeline heating band (2) of argon gas pipeline (1), its characterized in that: the argon gas pipeline comprises a argon gas pipeline (1), and is characterized in that the argon gas pipeline is coated with a pipeline heating belt (2) on the circumferential surface of the argon gas pipeline (1), the pipeline heating belt (2) is fixedly provided with a heating belt heat-insulating jacket (3) on the surface, the surfaces of the two sides of the heating belt heat-insulating jacket (3) are respectively fixedly connected with a first pipe hoop (4) and a second pipe hoop (5), the first pipe hoop (4) and the second pipe hoop (5) are sleeved on the upper surface of the argon gas pipeline (1), the first pipe hoop (4) and the second pipe hoop (5) are identical in structure, the surface of the heating belt heat-insulating jacket (3) is fixedly provided with a temperature measuring sensor (6), one side of the argon gas pipeline (1) is provided with a junction box (7), two supporting plates (12) are installed in the junction box (7), and a temperature control meter (8), a circuit breaker (9) and a circuit breaker are respectively arranged in the junction box (7), Solid-state relay (10) and temperature sensor (11), control by temperature change table (8) circuit breaker (9) solid-state relay (10) with temperature sensor (11) equal fixed mounting is two on backup pad (12).
2. The device of claim 1, wherein the heating device comprises: pipeline heating area (2) are silicon rubber pipeline heating area, pipeline heating area (2) inside inlays resistance heating wire (13) that have a plurality of equidistance and distribute.
3. The device of claim 1, wherein the heating device comprises: the circuit breaker (9) pass through the wire with control by temperature change table (8) electric connection, control by temperature change table (8) pass through the wire with solid state relay (10) electric connection, solid state relay (10) pass through the wire with pipeline heating area (2) electric connection.
4. The device of claim 1, wherein the heating device comprises: the first pipe hoop (4) comprises an arc-shaped clamping piece (41), a vertical connecting part (42) and a fixing screw (43), the arc-shaped clamping piece (41) and the vertical connecting part (42) are integrally formed, and the fixing screw (43) is fixedly connected with the vertical connecting part (42).
5. The device of claim 4, wherein the heating device comprises: the lower surface of the arc-shaped clamping piece (41) is connected with a rubber pad (14), and the rubber pad (14) is coated on the circumferential surface of the argon gas pipeline (1).
6. The device of claim 4, wherein the heating device comprises: one side of the vertical connecting part (42) is provided with an annular spring gasket (15), and the annular spring gasket (15) is sleeved on the fixing screw (43).
7. The device of claim 1, wherein the heating device comprises: the heating belt heat-insulating jacket (3) comprises an outer protective layer (31), a glass fiber heat-insulating layer (32) and an aerogel felt layer (33), wherein the outer protective layer (31) is fixedly connected to the upper end of the glass fiber heat-insulating layer (32), and the aerogel felt layer (33) is fixedly installed at the lower end of the glass fiber heat-insulating layer (32).
8. The device of claim 1, wherein the heating device comprises: the outer side surface of the junction box (7) is fixedly provided with a T-shaped block (16), the junction box (7) is provided with a mounting seat (17), a T-shaped groove (18) is formed in the mounting seat (17), and the T-shaped block (16) is slidably mounted in the T-shaped groove (18).
9. The device of claim 1, wherein the heating device comprises: one side of the junction box (7) is hinged with a switch door (19), and a visible window (20) is arranged on the switch door (19).
10. The device of claim 1, wherein the heating device comprises: the inner wall of the junction box (7) is provided with a plurality of guide grooves (21), and the support plate (12) is slidably mounted in the guide grooves (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120347406.2U CN215440226U (en) | 2021-02-07 | 2021-02-07 | VAD (vapor deposition) argon heating device for optical fiber preform core rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120347406.2U CN215440226U (en) | 2021-02-07 | 2021-02-07 | VAD (vapor deposition) argon heating device for optical fiber preform core rod |
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| CN215440226U true CN215440226U (en) | 2022-01-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112919797A (en) * | 2021-02-07 | 2021-06-08 | 通鼎互联信息股份有限公司 | VAD (vapor deposition) argon heating device for optical fiber preform core rod |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112919797A (en) * | 2021-02-07 | 2021-06-08 | 通鼎互联信息股份有限公司 | VAD (vapor deposition) argon heating device for optical fiber preform core rod |
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Granted publication date: 20220107 |