CN107540207A - A kind of outer method of pipe prepares the device and method of preform mother metal - Google Patents
A kind of outer method of pipe prepares the device and method of preform mother metal Download PDFInfo
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- CN107540207A CN107540207A CN201710964990.4A CN201710964990A CN107540207A CN 107540207 A CN107540207 A CN 107540207A CN 201710964990 A CN201710964990 A CN 201710964990A CN 107540207 A CN107540207 A CN 107540207A
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- sandwich layer
- mother metal
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- suspension rod
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Abstract
The present invention relates to the device and method that method outside a kind of pipe prepares preform mother metal.Device includes reaction cavity, top is installed on mobile rotation suspension rod in reaction cavity, lower section side corresponds to mobile rotation suspension rod between the upper and lower every being installed on covering blowtorch and sandwich layer blowtorch in cavity, the sandwich layer and covering of preform mother metal are formed for depositing, it is characterized in that outside reaction cavity at sandwich layer formation below install sandwich layer rangefinder, the output end of described sandwich layer rangefinder connects with PLC unit and computer, PLC unit and computer connect, and be connected with apparatus for controlling of lifting, sandwich layer rangefinder is formed with apparatus for controlling of lifting and feed back.The present invention improves the accuracy of detection to powder rod sandwich layer, it is thus possible to the sedimentation diameter of accurate dynamic control sandwich layer and covering, so as to improve the crudy of preform mother metal；The present invention sets reasonable simplicity, and automaticity is high, easy to operate, and feedback mechanism is rapid, reliable, and stability is strong, suitable for large-scale production.
Description
Technical field
The present invention relates to the device and method that method outside a kind of pipe prepares preform mother metal, more particularly to VAD methods to prepare
The device and method of preform mother metal, belong to optic fibre manufacturing technology field.
Background technology
In VAD prepares preform mother metal device, the growth of deposition plug is mostly detected using laser measuring apparatus
Situation and core diameter, laser measuring apparatus are placed outside reaction cavity mostly, and its detection laser drop point sent height is with depositing powder
Height at rod sandwich layer formation is identical, it is therefore intended that the height at control sandwich layer formation so that height and core at sandwich layer formation
The jetting height of layer blowtorch keeps constant, so as to ensure the crudy of sandwich layer deposition.Due to sending along level for detection laser
Direction, and the formation growth course of powder rod is then that vertically, the two direction differs 90 °, laser detection in actual use
There is certain error in installing for instrument, thus the levelness for detecting laser can also have some errors, because laser detecting apparatus is pacified
It is located at outside reaction cavity, there is certain length apart from test point, the inclination of the certain angle of horizontal direction will be in Vertical Square
Larger error is produced upwards so that larger deviation is had to the height detection at powder rod sandwich layer bottom surface formation, such as Fig. 3 institutes
Show, such as set distance of the laser measuring apparatus at sandwich layer formation as L, if horizontal direction upper deviation angle is θ, along powder rod sandwich layer growth side
Upward longitudinal bias is H1, H1=L × sin θ, relatively large deviation is had when L is larger, and the deviation in height concerns sandwich layer blowtorch
The injection drop point of jet flames, causes control accuracy to decline, so as to influence a series of quality such as the shape of sandwich layer, size, density
Parameter, the stability grown in deposition process is also relate to, these will determine the quality of deposition powder rod.
What is discussed in United States Patent (USP) US20120103023A1 is that the core covering image in powder rod deposition is obtained using CCD, from
And the ratio of core covering is calculated to produce core bag than stable head product, but it is that border determines very that this method, which has problem,
Inaccurately, so as to influenceing the control in powder rod deposition process.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of outer method of pipe for above-mentioned the shortcomings of the prior art
The device and method of preform mother metal is prepared, its measurement accuracy is high, and feedback mechanism is reliable, and crudy is good, and stability
By force, suitable for large-scale production.
The present invention is solves the problems, such as above-mentioned to be proposed that used device technique scheme is：Include reaction cavity, instead
Top is answered in cavity to be installed on mobile rotation suspension rod, lower section side corresponds to mobile rotation suspension rod between the upper and lower every being installed in cavity
Covering blowtorch and sandwich layer blowtorch, the sandwich layer and covering of preform mother metal (i.e. powder rod) are formed for depositing, it is characterised in that
Outside reaction cavity at sandwich layer formation below install sandwich layer rangefinder, the output end of described sandwich layer rangefinder and PLC unit and
Computer connects, and PLC unit and computer connect, and are connected with apparatus for controlling of lifting, makes sandwich layer rangefinder and elevating control
Device forms feedback.
By such scheme, described sandwich layer rangefinder is sandwich layer laser range finder.
By such scheme, plane high temperature resistant silica glass window, described sandwich layer laser are provided with reaction cavity bottom surface
The range laser of rangefinder passes through plane high temperature resistant silica glass window, beats vertically at prefabricated rods mother metal sandwich layer bottom surface formation,
Range laser light beam is with rotating the diameter parallel of suspension rod or overlapping.
By such scheme, reaction cavity blowtorch side is provided with air inlet, air inlet connects with inlet duct, in blowtorch phase
Gas outlet is provided with to side, gas outlet is connected with extractor fan, for maintaining certain pressure in deposition chamber and extracting out not
The particle of deposition.
By such scheme, include vertical pylon, liftable guide rail is housed on vertical pylon vertical direction, led on guide rail
Lifting seat connection lifting cantilever shalving is crossed, mobile rotation suspension rod is installed in lifting cantilever shalving front end, and the lower section of mobile rotation suspension rod is corresponding
Install the reaction cavity for deposition.
The technical scheme that the present invention prepares preform method is：
Using above-mentioned any device, reaction cavity is opened, glass target rod is fixed on mobile rotation downrod lower end, opened
Cantilever shalving is lifted, mobile rotation suspension rod is moved to initial position height and rotated with certain speed；
Sandwich layer caliper is opened, carries out Initialize installation, now suspension rod lifting speed is zero；
Deposition Material supply system is opened, successively lights sandwich layer blowtorch and covering blowtorch, supply system is according to respective flow
Setting value core, coverstock flow controller control under start to be taken up in order of priority supply sandwich layer blowtorch and covering blowtorch to glass
Target rod is sprayed, and the silica and germanium dioxide generated after hydrolysis starts to deposit on target rod predetermined position, is formed
The sandwich layer and covering of preform mother metal (i.e. powder rod), with the lasting progress of deposition, target rod lower end sandwich layer diameter gradually becomes
Grow greatly and downwards, when sandwich layer bottom surface reaches preset height value, through the detection of sandwich layer rangefinder and feedback of the information, start lifting and hang
Arm support, which rises, makes mobile rotation suspension rod start up to lift glass target rod；
With the continuation of deposition, sandwich layer rangefinder continuously acquires surveyed sandwich layer floor height, and PLC unit and computer pass through
PLC unit is fed back to after processing, controls the lifting speed of mobile rotation suspension rod；Until deposition terminates.
The beneficial effects of the present invention are：1st, by outside reaction cavity at sandwich layer formation below install sandwich layer rangefinder,
The range laser of laser range finder passes through plane high temperature resistant silica glass window, beats straight up in prefabricated rods mother metal sandwich layer bottom surface
At formation, when rangefinder is installed, and certain deflection occurs, being tilted in vertical height for vertical direction only produces very little error, makes
Height detection precision at powder rod sandwich layer bottom surface formation must be greatly improved, pass through the anti-of sandwich layer rangefinder and apparatus for controlling of lifting
Infeed mechanism, not only it can form situation by the current sandwich layer of real-time display online, and being capable of accurately dynamic control sandwich layer and covering
Sedimentation diameter, so as to improve the crudy of preform mother metal；2nd, due to detect and feedback be it is continuous carry out in real time, therefore
Feedback mechanism is rapid, reliable, processes the precision height of deposition, stability is strong, suitable for large-scale production；3rd, the present invention sets reasonable
Simplicity, automaticity is high, and easy to operate, converted products quality is good.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of one embodiment of the invention.
Fig. 2 is the feedback control system schematic diagram of one embodiment of the invention.
Fig. 3 is the error calculation schematic diagram that level installs sandwich layer caliper in the prior art.
Fig. 4 is the vertical error calculation schematic diagram for installing sandwich layer rangefinder of the present invention.
Embodiment
The invention will be further described with accompanying drawing with reference to embodiments.
The embodiment of apparatus of the present invention as shown in Figure 1, 2, includes vertical pylon 5, is equipped with vertical pylon vertical direction
Liftable guide rail, connects lifting cantilever shalving 2 on guide rail by lifting seat 3, and mobile rotation suspension rod is installed in lifting cantilever shalving front end
4, the lower section of mobile rotation suspension rod 4 is fixed with the glass target rod 6 for deposition, and use is correspondingly installed in the lower section of mobile rotation suspension rod
In the reaction cavity 1 of deposition, mobile rotation suspension rod is stretched into reaction cavity, and sandwich layer blowtorch A1 and bag are respectively equipped with reaction cavity
Layer blowtorch A2, described sandwich layer blowtorch and covering blowtorch spout are inclined upwardly, and its center core layer blowtorch elevation angle is 50 °, covering blowtorch
The elevation angle is 40 °.Described sandwich layer blowtorch is connected by core layer raw material flow controller with deposition Material supply system, described
Covering blowtorch is connected by coverstock flow controller with deposition Material supply system.It is provided with reaction cavity blowtorch side
Air inlet 7, air inlet connects with inlet duct, blowtorch opposite side is provided with gas outlet 8, gas outlet is connected with extractor fan
It is logical, for maintaining certain pressure in deposition chamber and extracting the particle not deposited out.Outside reaction cavity at sandwich layer formation below pacify
If sandwich layer rangefinder 10, sandwich layer rangefinder is installed on firm banking 11, and described sandwich layer rangefinder is sandwich layer laser range finder.
Plane high temperature resistant silica glass window 9 is provided with reaction cavity bottom surface, the range laser of described sandwich layer laser range finder is saturating
Plane high temperature resistant silica glass window is crossed, is beaten vertically at prefabricated rods mother metal sandwich layer bottom surface formation, range laser light beam and rotation
The diameter parallel of suspension rod or coincidence.
The output end of described sandwich layer rangefinder connects with PLC unit and computer, and PLC unit and computer connect, and
It is connected with apparatus for controlling of lifting, sandwich layer rangefinder is formed with apparatus for controlling of lifting and feed back.
It is as follows that the method and process of VAD preform mother metals are prepared by controlling sandwich layer floor height：
Using above-mentioned any device, reaction cavity is opened, glass target rod is fixed on mobile rotation downrod lower end, opened
Cantilever shalving is lifted, mobile rotation suspension rod is moved to initial position height and rotated with certain speed；
Sandwich layer caliper is opened, carries out Initialize installation, now suspension rod lifting speed is zero；
Deposition Material supply system is opened, successively lights sandwich layer blowtorch and covering blowtorch, supply system is according to respective flow
Setting value core, coverstock flow controller control under start to be taken up in order of priority supply sandwich layer blowtorch and covering blowtorch to glass
Target rod is sprayed, and the silica and germanium dioxide generated after hydrolysis starts to deposit on target rod predetermined position, is formed
The sandwich layer and covering of preform mother metal (i.e. powder rod), with the lasting progress of deposition, target rod lower end sandwich layer diameter gradually becomes
Greatly, a plane is formed in bottom bottom, afterwards as growth continues, sandwich layer rangefinder continuously acquires institute through glass window
The distance (height) to bottom at sandwich layer formation surveyed, data feedback to computer, amendment and processing of the computer Jing Guo data
Formed and fed back with the pull rate of lifting seat, when distance is less than set value, lifting seat starts up to lift powder rod, by
This is to ensure the lowermost end at sandwich layer formation all the time on a position, this ensures that sandwich layer blowtorch is at sandwich layer formation
The drop point of bottom surface flame is constant all the time, so as to ensure that the stability in powder rod growth course, and every ginseng of final powder rod
Number is stable.With the continuation of deposition, sandwich layer rangefinder continuously acquires surveyed sandwich layer floor height, feeds back to PLC after treatment
Unit, control the lifting speed of mobile rotation suspension rod；Until deposition terminates.
The deviation that height detection of the present invention at the formation of sandwich layer bottom surface occurs, is arrived as shown in figure 4, such as setting sandwich layer rangefinder
Distance at the formation of sandwich layer bottom is L, if the angle of deviation is θ in vertical direction, the axial deviation along in the powder rod sandwich layer direction of growth
Hx has following formula：H2=L-L × cos θ, deviation very little.Accuracy of detection is relative to be improved.
Claims (6)
1. a kind of outer method of pipe prepares the device of preform mother metal, include reaction cavity, top is installed in reaction cavity
Mobile rotation suspension rod, lower section side corresponds to mobile rotation suspension rod between the upper and lower every being installed on covering blowtorch and sandwich layer spray in cavity
Lamp, the sandwich layer and covering of preform mother metal are formed for depositing, it is characterised in that outside reaction cavity at sandwich layer formation under
Fang Anshe sandwich layer rangefinders, the output end of described sandwich layer rangefinder connect with PLC unit and computer, PLC unit and calculating
Machine connects, and is connected with apparatus for controlling of lifting, sandwich layer rangefinder is formed with apparatus for controlling of lifting and feeds back.
2. method prepares the device of preform mother metal outside the pipe as described in claim 1, it is characterised in that described sandwich layer is surveyed
Distance meter is sandwich layer laser range finder.
3. method prepares the device of preform mother metal outside the pipe as described in claim 2, it is characterised in that at reaction cavity bottom
Face is provided with plane high temperature resistant silica glass window, and the range laser of described sandwich layer laser range finder passes through plane high temperature resistant stone
English glass window, beat vertically at prefabricated rods mother metal sandwich layer bottom surface formation, the diameter parallel of range laser light beam and rotation suspension rod
Or overlap.
4. method prepares the device of preform mother metal outside the pipe as described in claim 1 or 2, it is characterised in that in reaction cavity
Blowtorch side is provided with air inlet, and air inlet connects with inlet duct, blowtorch opposite side is provided with gas outlet, gas outlet is with taking out
Wind apparatus is connected, for maintaining certain pressure in deposition chamber and extracting the particle not deposited out.
5. method prepares the device of preform mother metal outside the pipe as described in claim 1 or 2, it is characterised in that includes vertical
Pylon, is equipped with liftable guide rail on vertical pylon vertical direction, connects lifting cantilever shalving by lifting seat on guide rail, lifting is outstanding
Mobile rotation suspension rod is installed in arm support front end, and the reaction cavity for deposition is correspondingly installed in the lower section of mobile rotation suspension rod.
6. the method that a kind of outer method of pipe prepares preform mother metal, it is characterised in that
Using any device in claim 1-5, reaction cavity is opened, glass target rod is fixed on mobile rotation downrod lower end,
Lifting cantilever shalving is opened, mobile rotation suspension rod is moved to initial position height and rotated with certain speed；
Sandwich layer caliper is opened, carries out Initialize installation, now suspension rod lifting speed is zero；
Deposition Material supply system is opened, successively lights sandwich layer blowtorch and covering blowtorch, supply system is according to respective flow set
Value core, coverstock flow controller control under start to be taken up in order of priority supply sandwich layer blowtorch and covering blowtorch to glass target rod
Injection, the silica and germanium dioxide generated after hydrolysis start to deposit on target rod predetermined position, form optical fiber
The sandwich layer and covering of prefabricated rods mother metal, with the lasting progress of deposition, target rod lower end sandwich layer diameter becomes larger and grown downwards,
When sandwich layer bottom surface reaches preset height value, through the detection of sandwich layer rangefinder and feedback of the information, starting lifting cantilever shalving rising makes shifting
Dynamic rotation suspension rod starts up to lift glass target rod；
With the continuation of deposition, sandwich layer rangefinder continuously acquires surveyed sandwich layer floor height, is transferred to PLC unit and computer,
PLC unit is fed back to after treatment, controls the lifting speed of mobile rotation suspension rod；Until deposition terminates.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710964990.4A CN107540207A (en) | 2017-10-17 | 2017-10-17 | A kind of outer method of pipe prepares the device and method of preform mother metal |
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| CN201710964990.4A CN107540207A (en) | 2017-10-17 | 2017-10-17 | A kind of outer method of pipe prepares the device and method of preform mother metal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109407109A (en) * | 2018-12-28 | 2019-03-01 | 江苏通鼎光棒有限公司 | A kind of device and its monitoring method being sintered length for monitoring VAD loosening body |
| CN110204190A (en) * | 2019-07-12 | 2019-09-06 | 杭州金星通光纤科技有限公司 | A kind of manufacturing method and device of ultra-low loss single mode optical fiber |
| CN110272199A (en) * | 2019-07-16 | 2019-09-24 | 成都中住光纤有限公司 | A kind of method and device that optical fiber prefabricating club head accurately measures, melts |
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| JP2003277097A (en) * | 2002-01-16 | 2003-10-02 | Sumitomo Electric Ind Ltd | Method for manufacturing porous glass preform |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109407109A (en) * | 2018-12-28 | 2019-03-01 | 江苏通鼎光棒有限公司 | A kind of device and its monitoring method being sintered length for monitoring VAD loosening body |
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| CN110204190A (en) * | 2019-07-12 | 2019-09-06 | 杭州金星通光纤科技有限公司 | A kind of manufacturing method and device of ultra-low loss single mode optical fiber |
| CN110204190B (en) * | 2019-07-12 | 2023-11-24 | 杭州金星通光纤科技有限公司 | Manufacturing method and device of ultra-low loss single mode fiber |
| CN110272199A (en) * | 2019-07-16 | 2019-09-24 | 成都中住光纤有限公司 | A kind of method and device that optical fiber prefabricating club head accurately measures, melts |
| CN110272199B (en) * | 2019-07-16 | 2023-07-04 | 成都中住光纤有限公司 | Method and device for accurately measuring and melting optical fiber preform rod head |
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Application publication date: 20180105 |