CN201952356U - Optical-fiber prefabricated-bar clamping device - Google Patents
Optical-fiber prefabricated-bar clamping device Download PDFInfo
- Publication number
- CN201952356U CN201952356U CN2011200017095U CN201120001709U CN201952356U CN 201952356 U CN201952356 U CN 201952356U CN 2011200017095 U CN2011200017095 U CN 2011200017095U CN 201120001709 U CN201120001709 U CN 201120001709U CN 201952356 U CN201952356 U CN 201952356U
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- bar
- optical
- clamping device
- pressing block
- prefabricated
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Abstract
The utility model relates to an optical-fiber prefabricated-bar clamping device, which relates to the technical field of optical-fiber manufacture. The optical-fiber prefabricated-bar clamping device comprises a clamping rod, and is characterized in that a pressing block is arranged at the tail end of the clamping rod, the sliding fit of the pressing block and the clamping rod is formed through a sliding slot, one end of the pressing block is protruded from the tail end of the clamping rod, and the other end of the pressing block is connected with the clamping rod through a spring. When a prefabricated bar is clamped by the optical-fiber prefabricated-bar clamping device, the pressing block is acted on a quartz bar of the prefabricated bar, and the spring is sufficiently compressed to provide a sufficient pressing force. When a gap exists between the pressing block and the quartz bar due to different thermal-expansion coefficients, the compressed spring can be recovered in time so as to ensure that a quartz hand bar can not slide down.
Description
Technical field
The utility model relates to the optic fibre manufacturing technology field.
Background technology
At present, optical fiber mainly is the preparation by prefabricated rods, at high temperature draws to optical fiber again.The prefabricated rods diameter less than 200mm length during less than 3000mm the optical fiber manufacturing generally adopt the silica tube welding on prefabricated rods, and be clamped on the silica tube and prefabricated rods sent into the wire drawing of graphite furnace internal heating.Development and raising along with optic fibre manufacturing technology, for reducing production costs, preform diameter and length are increasing, the weight of corresponding its prefabricated rods is also increasing, the wire drawing time is also more and more longer, manufacturers generally adopts quartz pushrod to replace silica tube, because the heat seal strength of quartz pushrod and prefabricated rods is much larger than the heat seal strength of silica tube and prefabricated rods.
Referring to Fig. 1,2, because quartz pushrod is not easy heat radiation than silica tube, the wire drawing time of single prefabricated rods increases.When graphite furnace heating prefabricated rods, heat is transmitted on the quartz pushrod and by quartz pushrod by prefabricated rods and is transmitted on the clamping device, and the material that clamping device is used is a steel.Because the thermal expansivity of steel is 20～100 ℃: 11.59e-6/ ℃
20～200℃：12.32e-6/℃
20～300℃：13.09e-6/℃
20～400℃：13.71e-6/℃
20～500℃：14.18e-6/℃
20～600℃：14.67e-6/℃
And quartzy thermal expansivity is that 5.5e-7/ ℃ of thermal expansivity between the two do not match, and causes quartz pushrod landing in the anchor clamps to cause the financial losses such as damage of graphite member and prefabricated rods in the graphite furnace when temperature variation easily.Therefore design and a kind ofly novel can prevent that the prefabricated rods of landing and the combination of quartz pushrod are necessary easily because of difference of thermal expansion coefficients.
The utility model content
Technical problem to be solved in the utility model is the deficiency that exists at above-mentioned prior art to provide a kind of clamping device that is used for the grip optical fiber prefabricated rods, the quartz pushrod landing in the clamping device of prefabricated rods that can prevent welding.
The utility model is that the technical scheme that problem adopted of the above-mentioned proposition of solution is: the preform clamping device, comprise supporting rod, it is characterized in that, the end of supporting rod is provided with briquetting, briquetting forms by chute and supporting rod and is slidingly matched, briquetting one end protrudes from the end of supporting rod, and the other end is connected with supporting rod by spring.
Briquetting acts on the quartz pushrod of prefabricated rods and spring is enough compressed so that enough snap-in forces to be provided during the clamping prefabricated rods.When causing between briquetting and the quartz pushrod slit being arranged because of the thermal expansivity difference, compressed spring can in time remedy, thereby has guaranteed that quartzy hand rod can not get off in landing.
The utility model is described in further detail below in conjunction with description of drawings and embodiment.
Description of drawings
Fig. 1 is the synoptic diagram of the clamping device grip optical fiber prefabricated rods of prior art.
Fig. 2 causes preform synoptic diagram during landing in anchor clamps because of difference of thermal expansion coefficients.
Fig. 3 is the local enlarged diagram of A part of Fig. 2.
Fig. 4 is a structural representation of the present utility model.
Fig. 5 is the local enlarged diagram of the part of B part of the present utility model.
Embodiment
Referring to Fig. 4,5, the preform clamping device comprises supporting rod 1, it is characterized in that the end of supporting rod is provided with briquetting 5, briquetting 5 forms by chute and supporting rod and is slidingly matched, briquetting 5 one ends protrude from the end of supporting rod, and the other end is connected with supporting rod by spring.
The briquetting 5 of supporting rod 1 end is clamped on the quartz pushrod 2, when briquetting 5 is pressed on the quartz pushrod 2, spring 4 is compressed, this moment, spring 4 provided enough holding forces, and this holding force also provides except compressing quartz pushrod because elastic compensating is carried out in quartz pushrod that difference of thermal expansion coefficients causes and the gap between the briquetting to this gap power.That is: spring 4 can in time eject it is compensated when occurring the gap occurring between quartz pushrod and briquetting, and compresses briquetting and make quartz pushrod keep clamped state, prevents to slide.
Supporting rod is originally as prior art, so specification sheets no longer describes its structure in detail.The utility model ties up to the supporting rod end increases briquetting and spring, does not change original layout of supporting rod.
Claims (1)
1. the preform clamping device comprises supporting rod (1), it is characterized in that, the end of supporting rod (1) is provided with briquetting (5), briquetting (5) forms by chute and supporting rod and is slidingly matched, and briquetting (5) one ends protrude from the end of supporting rod, and the other end is connected with supporting rod by spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200017095U CN201952356U (en) | 2011-01-05 | 2011-01-05 | Optical-fiber prefabricated-bar clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200017095U CN201952356U (en) | 2011-01-05 | 2011-01-05 | Optical-fiber prefabricated-bar clamping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201952356U true CN201952356U (en) | 2011-08-31 |
Family
ID=44496478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200017095U Expired - Lifetime CN201952356U (en) | 2011-01-05 | 2011-01-05 | Optical-fiber prefabricated-bar clamping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201952356U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304820A (en) * | 2019-06-04 | 2019-10-08 | 江苏亨通光导新材料有限公司 | A kind of buffering centring means drawing bar for stablizing quartz |
| CN112299704A (en) * | 2020-11-13 | 2021-02-02 | 中国电子科技集团公司第四十六研究所 | Clamp and clamping method for improving geometric precision of polarization maintaining optical fiber preform |
-
2011
- 2011-01-05 CN CN2011200017095U patent/CN201952356U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110304820A (en) * | 2019-06-04 | 2019-10-08 | 江苏亨通光导新材料有限公司 | A kind of buffering centring means drawing bar for stablizing quartz |
| CN112299704A (en) * | 2020-11-13 | 2021-02-02 | 中国电子科技集团公司第四十六研究所 | Clamp and clamping method for improving geometric precision of polarization maintaining optical fiber preform |
| CN112299704B (en) * | 2020-11-13 | 2023-12-29 | 中国电子科技集团公司第四十六研究所 | Clamp and clamping method for improving geometric accuracy of polarization maintaining optical fiber preform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110831 |