CN207435309U - A kind of upper end connection structure of prefabricated rods female rod to be tensioned - Google Patents
A kind of upper end connection structure of prefabricated rods female rod to be tensioned Download PDFInfo
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- CN207435309U CN207435309U CN201721275293.XU CN201721275293U CN207435309U CN 207435309 U CN207435309 U CN 207435309U CN 201721275293 U CN201721275293 U CN 201721275293U CN 207435309 U CN207435309 U CN 207435309U
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- segment
- rod
- female rod
- prefabricated rods
- outer diameter
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Abstract
The utility model discloses a kind of upper end connection structures of prefabricated rods female rod to be tensioned, cylindric extension rod including prefabricated rods female rod He the upper end for being arranged on prefabricated rods female rod, the extension rod includes first segment and second segment, the both ends of the second segment are connected respectively with first segment and prefabricated rods female rod, and the outer diameter of second segment is more than the outer diameter of first segment.The utility model reduces the reduced diameter portion of large scale female rod and extension rod weld, increase the contact area between large size prefabricated stick female rod and extension rod, it ensure that the fastness of the two weld, so that the stick footpath for stretching plug epilog portion is easier to control, reduce scrapping of stretching that ending plug generated when outer diameter is exceeded, improve raw material rate and device efficiency.
Description
Technical field
The utility model is related to apparatus for preparing optical fiber blanks technical field more particularly to a kind of prefabricated rods female rods to be tensioned
Upper end connection structure.
Background technology
Most manufacturers are the production that preform is carried out with " two-step method " technique at present, i.e., first use vapour deposition process
(PCVD, MCVD, VAD or OVD) manufactures prefabricated rod mandrel, and the mode of deposition covering or casing is then taken to be made outside plug
Prefabricated rods.When two-step method manufactures plug, it is the large size prefabricated stick female rod of manufacture first, then stretches large size prefabricated stick female rod
Into the thin plug of uniform external diameter.
When stretching large size prefabricated stick female rod, in order to farthest utilize raw material, while facilitate the erection of charge bar, it is necessary to
In the both ends welding extension rod of large size prefabricated stick female rod.The raw material for making extension rod is also pure quartz glass, is added through overheat
Work, it also can securely welding at the both ends of large size prefabricated stick female rod.The extension rod generally used is all homogeneous thin of outer diameter
Quartz glass bar, the outer diameter of this thin extension rod is smaller about 20~50mm than the minimum outer diameter of large size prefabricated stick female rod, and the two melts
The interface connect can there are a bigger reduced diameter portions.This reduced diameter portion can cause plug after stretching to be produced due to outer diameter is exceeded
Raw learies increase, while larger loss can be caused to extension rod, influence raw material availability and device efficiency.
Utility model content
The technical problem to be solved by the utility model is to provide one kind in view of the deficiency of the prior art to treat
The upper end connection structure of prefabricated rods female rod is stretched, it is reasonable in design simple, and reusability is high, the loss of stretched plug
Few, raw material availability is high.
Technical solution is used by the utility model：A kind of upper end connection structure of prefabricated rods female rod to be tensioned, bag
It includes prefabricated rods female rod and is arranged on the cylindric extension rod of prefabricated rods female rod upper end, the extension rod includes first segment and second
Section, the both ends of the second segment are connected respectively with first segment and prefabricated rods female rod, and the outer diameter of second segment is more than the outer diameter of first segment.
By above-mentioned technical proposal, the outer diameter of the second segment is 50~80mm, and length is 200~400mm, the first segment
Outer diameter for 20~50mm, length is 300~600mm.
By above-mentioned technical proposal, the end face and side of the second segment and first segment are smooth burnishing surface.
By above-mentioned technical proposal, a cylinder pin hole extended transversely through is equipped in the upper end of first segment.
By above-mentioned technical proposal, at 10~30mm of upper surface of the cylinder pin hole away from first segment, aperture is 10~30mm.
By above-mentioned technical proposal, the outer diameter of the prefabricated rods female rod is 80~120mm.
Having the beneficial effect that acquired by the utility model：
1st, the utility model reduces the reduced diameter portion of prefabricated rods female rod and extension rod weld, increases prefabricated rods female rod
Contact area between extension rod ensure that the fastness of the two weld so that stretch the stick footpath of plug epilog portion more
It is easy to control, reduces scrapping of stretching that ending plug generated when outer diameter is exceeded, improve raw material rate and device efficiency；
2nd, extension rod there is no the part of deformation after the completion of stretching, therefore the multiplexing number of extension rod increases, and reduce
The cost of raw material, while extension rod will not be attenuated during stretching, considerably increase in operation and operational process
Safety coefficient.
Description of the drawings
Fig. 1 is the structure chart of the utility model.
Fig. 2 is the working state figure of the utility model.
Specific embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of upper end connection structure of prefabricated rods female rod to be tensioned is present embodiments provided, including prefabricated
Stick female rod and the cylindric extension rod for being arranged on prefabricated rods female rod upper end, the extension rod includes first segment and second segment, described
The both ends of second segment are connected respectively with first segment and prefabricated rods female rod, and the outer diameter of second segment is more than the outer diameter of first segment.Described
Two sections of outer diameter is 50~80mm, and length is 200~400mm, and the outer diameter of the first segment is 20~50mm, length for 300~
600mm.The end face and side of the second segment and first segment are smooth burnishing surface.
In the present embodiment, a cylinder pin hole extended transversely through is equipped in the upper end of first segment, for being inserted into alloy bolt.
At 10~30mm of upper surface of the cylinder pin hole away from first segment, aperture is 10~30mm.
Referring to Fig. 2, when extension rod 1 is docked with large size prefabricated stick female rod 2, first with heating equipment by the interface of the two and
Peripheral region is heated to molten condition, and passing through mechanical driving device leans on extension rod 1 and the end face of large size prefabricated stick female rod 2
It closely and contacts, extension rod and large size prefabricated stick female rod 2 is slightly squeezed to weld, the two is made to come into full contact with and melt as one
Body.If protrusion occurs in weld, can be flattened during heating with heat safe auxiliary tool.Welding exists after finishing
It cools down at room temperature.
Referring to Fig. 2, in aforementioned manners in another end face of prefabricated rods female rod, the cylindrical glass of piece homogeneous diameter of welding
Glass stick 3.It is cooled down at room temperature after the completion of welding.So far, preparation finishes before the stretching of large size prefabricated stick female rod 2.
Bolt is inserted into the pin hole of extension rod referring to Fig. 2, the large size prefabricated stick female rod 2 with extension rod is set up into drawing
It stretches in equipment, extension rod 1 is connected with the top 4 of stretching device in the top of large size prefabricated stick female rod 2 at this time.
Referring to Fig. 2, by rod feeder, large size prefabricated stick female rod 2 is sent into heating unit 5.The heating dress
It is set to resistance-heated furnace or electromagnetic induction heating furnace.Large size prefabricated stick female rod 2 is placed in the hot-zone of heating furnace, big ruler
The glass bar 3 of very little 2 lower end welding of prefabricated rods female rod is fixed on the lower part 6 of stretching device by mechanical device.
After starting stretching, large size prefabricated stick female rod 2 is heated to certain molten condition by heating unit, and stretching device leads to
Lifting is crossed, the large size prefabricated stick female rod 2 heated is drawn and attenuated.In drawing process, first from one end of large size prefabricated stick female rod 2
(one end away from extension rod) starts to stretch, and heating unit is gradually moved to the other end, and large size prefabricated stick female rod 2 one saves
Ground is drawn into the thin plug of uniform external diameter.At the end of stretching, heating unit is parked in extension rod 1 and large size prefabricated stick female rod 2
Weld.
Due to the weld outer diameter transitions smooth of extension rod 1 and large size prefabricated stick female rod 2, the light of large area will not be generated
Reflecting surface reduces the influence generated by light radiation to hot-zone in heating unit.Nearly ending phase is stretched, the external diameter of finished product obtains
To preferable control；After having stretched, the integrality of extension rod is also guaranteed.
Claims (6)
1. a kind of upper end connection structure of prefabricated rods female rod to be tensioned including prefabricated rods female rod and is arranged in prefabricated rods female rod
The cylindric extension rod at end, the extension rod include first segment and second segment, the both ends of the second segment respectively with first segment and
Prefabricated rods female rod is connected, and the outer diameter of second segment is more than the outer diameter of first segment.
2. upper end connection structure according to claim 1, it is characterised in that：The outer diameter of the second segment for 50~
80mm, length are 200~400mm, and the outer diameter of the first segment is 20~50mm, and length is 300~600mm.
3. upper end connection structure according to claim 1 or 2, it is characterised in that：The end of the second segment and first segment
Face and side are smooth burnishing surface.
4. upper end connection structure according to claim 1 or 2, it is characterised in that：One is equipped in the upper end of first segment
The cylinder pin hole extended transversely through.
5. upper end connection structure according to claim 4, it is characterised in that：Upper end of the cylinder pin hole away from first segment
At 10~30mm of face, aperture is 10~30mm.
6. upper end connection structure according to claim 1 or 2, it is characterised in that：The outer diameter of the prefabricated rods female rod is
80~120mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721275293.XU CN207435309U (en) | 2017-09-30 | 2017-09-30 | A kind of upper end connection structure of prefabricated rods female rod to be tensioned |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721275293.XU CN207435309U (en) | 2017-09-30 | 2017-09-30 | A kind of upper end connection structure of prefabricated rods female rod to be tensioned |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207435309U true CN207435309U (en) | 2018-06-01 |
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ID=62295190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721275293.XU Active CN207435309U (en) | 2017-09-30 | 2017-09-30 | A kind of upper end connection structure of prefabricated rods female rod to be tensioned |
Country Status (1)
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| CN (1) | CN207435309U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114212989A (en) * | 2021-11-30 | 2022-03-22 | 浙江富通光纤技术有限公司 | Processing technology of prefabricated rod and optical fiber |
-
2017
- 2017-09-30 CN CN201721275293.XU patent/CN207435309U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114212989A (en) * | 2021-11-30 | 2022-03-22 | 浙江富通光纤技术有限公司 | Processing technology of prefabricated rod and optical fiber |
| CN114212989B (en) * | 2021-11-30 | 2023-07-28 | 浙江富通光纤技术有限公司 | Processing technology of preform and optical fiber |
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