CN205590558U - A double glazing horse is not managed for preparing prefabricated stick of low loss fiber - Google Patents
A double glazing horse is not managed for preparing prefabricated stick of low loss fiber Download PDFInfo
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- CN205590558U CN205590558U CN201620405868.4U CN201620405868U CN205590558U CN 205590558 U CN205590558 U CN 205590558U CN 201620405868 U CN201620405868 U CN 201620405868U CN 205590558 U CN205590558 U CN 205590558U
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- horse
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- glass
- muffle tube
- double glazing
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Abstract
The utility model discloses a double glazing horse is not managed for preparing prefabricated stick of low loss fiber, a make technical field of optical fiber perform is related to, the middle part that this glass horse was not managed is provided with heating element, this glass horse is not managed including the inlayer, it is outer, the inlayer, the cavity has between the skin, the skin is provided with the intake pipe, the blast pipe, the intake pipe is located this glass horse not between socle portion and the heating element, the blast pipe is located this glass horse not between nose portion and the heating element, an air inlet pipe, the blast pipe all communicates with the cavity: during the use, the circulation has the high -purity inert gas that purity is greater than 99% in the cavity. This double glazing horse is not managed to bilayer structure to circulation high -purity inert gas in the cavity between inlayer, the skin, the high -purity inert gas who flows can arrange the outside with the metallic impurity of heating element diffusion, avoids metallic impurity to sneak into optical fiber perform, thereby reduces optical fiber perform's impurity absorption loss.
Description
Technical field
This utility model relates to the manufacturing technology field of preform, is specifically related to a kind of use
In the double glazing muffle tube preparing low loss fiber prefabricated rods.
Background technology
VAD (Vapor-phase Axial Deposition, the gas phase of preform autofrettage
Axial deposition) after method makes glass microbead deposit, need glass microbead deposit is put into glass
Heat in glass muffle tube so that it is clear glass.In the heating assembly of glass muffle tube one
As containing carbon fiber component, metal impurities containing trace in fiber component, in heating process,
Metal impurities in carbon fiber component can be diffused in glass muffle tube, is mixed into glass granules deposition
Internal, thus the attenuation characteristic of optical fiber made to this preform has undesirable effect.
Utility model content
The purpose of this utility model is the deficiency in order to overcome above-mentioned background technology, it is provided that a kind of
For preparing the double glazing muffle tube of low loss fiber prefabricated rods, this double glazing muffle tube is
Circulation high-purity noble gas in cavity between double-decker, and internal layer, outer layer, flowing
High-purity noble gas can by heating assembly diffusion metal impurities be discharged to outside, it is to avoid gold
Belong to impurity and be mixed into preform, thus reduce the Impurity Absorption loss of preform.
This utility model provides a kind of double glazing for preparing low loss fiber prefabricated rods
Muffle tube, this glass muffle tube includes internal layer, outer layer, has cavity between internal layer, outer layer,
Outer layer is provided with air inlet pipe, exhaustor, air inlet pipe be positioned at bottom this glass muffle tube with heating group
Between part, exhaustor is at this glass muffle tube top and heats between assembly, air inlet pipe, row
Trachea all connects with cavity: during use, and the high-purity that the interior circulation of cavity has purity to be more than 99% is lazy
Property gas.
On the basis of technique scheme, being spaced apart between described internal layer, outer layer
50～60mm.
On the basis of technique scheme, the axial length≤internal layer of described outer layer axial
Length.
On the basis of technique scheme, described noble gas is argon or helium.
Compared with prior art, advantage of the present utility model is as follows:
This utility model is that the interior circulation of the cavity between double-decker, and internal layer, outer layer is high-purity
Degree noble gas, the high-purity noble gas of flowing can be by the metal impurities of heating assembly diffusion
It is discharged to outside, it is to avoid metal impurities are mixed into preform, thus reduce the miscellaneous of preform
Matter absorption loss.
Accompanying drawing explanation
Fig. 1 is the structural representation of double glazing muffle tube in this utility model embodiment.
Reference: 1 internal layer, 2 outer layers, 3 heating assemblies, 2a air inlet pipe, 2b
Exhaustor.
Detailed description of the invention
Below in conjunction with the accompanying drawings and this utility model is described in further detail by specific embodiment.
Shown in Figure 1, this utility model embodiment provides one to be used for preparing low loss fiber
The double glazing muffle tube of prefabricated rods, the middle part of this glass muffle tube is provided with heating assembly 3,
This glass muffle tube includes internal layer 1, outer layer 2, has cavity between internal layer 1, outer layer 2,
Outer layer 2 is provided with air inlet pipe 2a, exhaustor 2b, and air inlet pipe 2a is positioned at the bottom of this glass muffle tube
Between portion and heating assembly 3, exhaustor 2b is positioned at this glass muffle tube top and heating assembly
Between 3, air inlet pipe 2a, exhaustor 2b all connect with cavity: during use, circulation in cavity
There is the high-purity noble gas that purity is more than 99%.
The heating position of glass muffle tube is double-decker, the axial length≤internal layer 1 of outer layer 2
Axial length.In cavity between internal layer 1, outer layer 2, the high-purity noble gas of circulation can
Thinking argon or helium, helium is relatively costly, typically selects argon.High-purity noble gas
By the downside air inlet of heating assembly 3, by the upside aerofluxus of heating assembly 3.
In order to prevent from heating the metal impurities in assembly 3 be diffused into the internal layer 1 of glass muffle tube with
In, the interval of internal layer 1, outer layer 2 is set as more than 50mm, can be 50～60mm,
The flow velocity of high-purity noble gas is at more than 1.0m/s.Circulation is between internal layer 1, outer layer 2
The metal impurities that heating assembly 3 spreads can be discharged to outside by high-purity noble gas, and metal is miscellaneous
Matter is not diffuse into the inside of glass muffle tube, it is to avoid metal impurities are mixed into preform, from
And reduce the Impurity Absorption loss of preform.
Those skilled in the art can carry out various amendment and change to this utility model embodiment
Type, if these amendments and modification are in this utility model claim and the scope of equivalent technologies thereof
Within, then these amendments and modification are also within protection domain of the present utility model.
The prior art that the content not described in detail in description is known to the skilled person.
Claims (4)
1. for preparing a double glazing muffle tube for low loss fiber prefabricated rods, this glass
The middle part of muffle tube is provided with heating assembly (3), it is characterised in that: this glass muffle tube includes
Internal layer (1), outer layer (2), have cavity, outer layer (2) between internal layer (1), outer layer (2)
Being provided with air inlet pipe (2a), exhaustor (2b), air inlet pipe (2a) is positioned at this glass muffle tube
Between bottom with heating assembly (3), exhaustor (2b) be positioned at this glass muffle tube top and
Between heating assembly (3), air inlet pipe (2a), exhaustor (2b) all connect with cavity: make
Used time, in cavity, circulation has the high-purity noble gas that purity is more than 99%.
2. the double glazing for preparing low loss fiber prefabricated rods as claimed in claim 1
Muffle tube, it is characterised in that: it is spaced apart 50～60mm between described internal layer (1), outer layer (2).
3. the double glazing for preparing low loss fiber prefabricated rods as claimed in claim 1
Muffle tube, it is characterised in that: the axial length≤internal layer (1) of described outer layer (2) axial
Length.
4. the double glazing for preparing low loss fiber prefabricated rods as claimed in claim 1
Muffle tube, it is characterised in that: described noble gas is argon or helium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620405868.4U CN205590558U (en) | 2016-05-06 | 2016-05-06 | A double glazing horse is not managed for preparing prefabricated stick of low loss fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620405868.4U CN205590558U (en) | 2016-05-06 | 2016-05-06 | A double glazing horse is not managed for preparing prefabricated stick of low loss fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205590558U true CN205590558U (en) | 2016-09-21 |
Family
ID=56932891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620405868.4U Active CN205590558U (en) | 2016-05-06 | 2016-05-06 | A double glazing horse is not managed for preparing prefabricated stick of low loss fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205590558U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112811809A (en) * | 2021-01-14 | 2021-05-18 | 烽火通信科技股份有限公司 | Optical fiber drawing furnace with low helium consumption |
-
2016
- 2016-05-06 CN CN201620405868.4U patent/CN205590558U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112811809A (en) * | 2021-01-14 | 2021-05-18 | 烽火通信科技股份有限公司 | Optical fiber drawing furnace with low helium consumption |
| CN112811809B (en) * | 2021-01-14 | 2022-11-25 | 烽火通信科技股份有限公司 | Optical fiber drawing furnace with low helium consumption |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |