CN113651527A - Preparation method of precise quartz liner tube and stretching equipment thereof - Google Patents
Preparation method of precise quartz liner tube and stretching equipment thereof Download PDFInfo
- Publication number
- CN113651527A CN113651527A CN202111009151.XA CN202111009151A CN113651527A CN 113651527 A CN113651527 A CN 113651527A CN 202111009151 A CN202111009151 A CN 202111009151A CN 113651527 A CN113651527 A CN 113651527A
- Authority
- CN
- China
- Prior art keywords
- liner tube
- tube
- quartz
- quartz liner
- pure quartz
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01466—Means for changing or stabilising the diameter or form of tubes or rods
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention relates to a method for preparing a precise quartz liner tube and stretching equipment thereof. The pure quartz hollow tube blank is prepared by the OVD process, so that the requirement on high purity of the quartz liner tube material is met, the hydroxyl content is low, the processing efficiency is high, and the manufacturing cost is low; the drawn pure quartz liner tube has high geometric accuracy, ovality and offset parameters, and the processing accuracy of the drawn pure quartz liner tube prepared in a non-contact manner is effectively improved. The vertical type fusion stretching equipment disclosed by the invention is simple and reasonable in structure arrangement, and uniform in circumferential thermal field distribution, so that the drawing processing quality of the pure quartz liner tube is ensured.
Description
Technical Field
The invention relates to a preparation method of a precise quartz liner tube and stretching equipment thereof, belonging to the technical field of preparation of optical fiber preforms and quartz tubes and the like.
Background
Pure quartz liner tubes and quartz tubes are widely applied in the field of optical fiber preform manufacturing, the pure quartz liner tubes with size and precision requirements are usually formed by high-temperature fusion and stretching of quartz tube blanks, the fusion and stretching is divided into contact stretching and non-contact stretching, the non-contact stretching method is used for stretching high-purity quartz glass thick-wall tubes, the quartz glass tube blanks are in a plastic state in a heating area of a smelting furnace, then the quartz glass thick-wall tubes are reduced by traction to reach the preset required size, the quartz glass in the molten state does not contact any tool, and the quartz tube finished products after the non-contact stretching have smooth surfaces, good quality and no scratches or grooves. However, since the non-contact stretching method does not use an auxiliary die, geometric parameters such as fluctuation of outer diameter, ovality, wall thickness deviation (hereinafter referred to as "deflection") and bow curvature of the quartz liner tube are difficult to be effectively controlled, thereby affecting the processing precision of the pure quartz liner tube and the finished quartz tube. Therefore, the processing technology and the stretching equipment of the pure quartz liner tube and the quartz tube are required to be further improved and enhanced.
CN100371670C proposes a high-performance resistance heating furnace, which adopts graphite as heat conduction material, and realizes better circumferential temperature distribution uniformity by uniformly distributing the optimal power supply points of eight-point supply around the circumference of a heat conduction piece through double-electrode supply. The resistance heat structure is complex, the assembly precision requirement of parts such as graphite pieces, electrodes and the like is high, the air tightness of a furnace body is poor, and graphite elements are easy to burn. There is also a big problem that the resistance furnace consumes much energy and the maintenance cost is also high.
CN101679098A discloses a vertical drawing process in which a quartz glass cylinder and a drawn liner product are rotated relative to each other on a longitudinal axis during drawing, called "twisting", which makes the circumferential temperature distribution in the furnace uniform, compensating for the thermal field asymmetry in the heated zone of the furnace. However, in order to realize the rotation of the quartz glass cylinder or the liner tube product in the stretching axial direction, a complex feeding mechanical equipment system or a mechanical traction system needs to be matched for guarantee, so that the industrialization cost and difficulty are increased.
Disclosure of Invention
The invention aims to solve the technical problem of providing a preparation method of a precise quartz liner tube and stretching equipment thereof aiming at the defects in the prior art, which not only can improve and improve the precision of stretching the quartz liner tube and avoid the distortion of the ovality and the deflection parameters of the quartz liner tube, but also has simple and reasonable structure and arrangement of processing equipment and is convenient for industrialization.
The technical scheme of the preparation method adopted by the invention for solving the problems is as follows: firstly, preparing a pure quartz hollow tube blank by using OVD (outside vapor deposition), then grinding the inner diameter and the outer diameter of the pure quartz hollow tube blank to process a pure quartz hollow sleeve with small wall thickness deviation, and finally drawing the pure quartz hollow sleeve into a pure quartz liner tube by using vertical fusion drawing equipment.
According to the scheme, the grinding processing of the inner diameter and the outer diameter comprises rough grinding processing of the outer diameter and the inner hole and finish grinding processing of the outer diameter and the inner hole.
According to the scheme, the hydroxyl content of the pure quartz hollow tube blank is less than or equal to 1ppm by weight.
According to the scheme, the outer diameter of the pure quartz hollow sleeve is processed to be less than or equal to 150mm, the aperture of the inner hole is processed to be 45-70 mm, and the wall thickness deviation of the unilateral pipe wall is less than or equal to 0.3 mm.
According to the scheme, the outer diameter of the pure quartz liner tube is 10-50 mm, the wall thickness is less than or equal to 5mm, the ovality is less than or equal to 0.05mm, and the wall thickness deviation of the unilateral tube wall is less than or equal to 0.05 mm.
The technical scheme of the vertical melting and stretching equipment is as follows: the furnace comprises a vertical furnace body, a cylindrical heating element is arranged on the upper part of the furnace body, a heat-insulating layer is arranged on the periphery of the cylindrical heating element, a sealing gas ring is arranged at a furnace mouth at the upper end of the furnace body, a rod clamping device is arranged above the furnace body corresponding to the furnace mouth at the upper end, and a traction wheel is arranged below the furnace body corresponding to a furnace outlet at the lower end.
According to the scheme, the cylindrical heater comprises a graphite heating barrel arranged above the furnace body, the periphery of the graphite heating barrel is coated with a heat-insulating layer, and an induction coil is arranged outside the heat-insulating layer.
According to the scheme, the inner diameter of the graphite heating tube is 160-210 mm, the axial height is 600-900 mm, the inner diameter of the induction coil is 300-400 mm, and the axial height is 150-400 mm.
According to the scheme, the traction wheels comprise a pair of traction wheels with parallel wheel shafts and capable of rotating at a constant speed in opposite directions, and a radial constant pressure device is arranged between the pair of traction wheels.
According to the scheme, the heating temperature of the cylindrical heating element is 1900-2100 ℃, and the traction linear speed (stretching speed) of the traction wheel is 500-800 mm/min.
According to the scheme, the sealing gas ring is communicated with a pressure inert gas source.
According to the scheme, the rod clamping device is connected with the lifting mechanism.
The invention has the beneficial effects that: 1. the blank of the pure quartz hollow tube is prepared by the OVD process, so that the requirement on high purity of the quartz liner tube material is met, the hydroxyl content is low, the processing efficiency is high, and the manufacturing cost is low; 2. the pure quartz hollow tube blank is subjected to internal and external diameter grinding processing to form a pure quartz hollow sleeve with good geometric dimension and small wall thickness deviation, and a good foundation is laid for the next non-contact fusion drawing; 3. the final drawn pure quartz liner tube has high geometric accuracy, ovality and offset parameters, and the processing accuracy of the non-contact preparation of the drawn pure quartz liner tube is effectively improved; 4. the vertical type fusion stretching equipment disclosed by the invention is simple and reasonable in structure arrangement, and uniform in circumferential thermal field distribution, so that the drawing processing quality of the pure quartz liner tube is ensured.
Drawings
FIG. 1 is a cross-sectional structural view of a vertical melt-drawing apparatus according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the following figures and examples. Firstly, preparing a pure quartz hollow tube blank by using OVD (outside vapor deposition), wherein the purity of the material is high, and the hydroxyl content is 0.6ppm (wt), then carrying out inner and outer diameter grinding processing on the pure quartz hollow tube blank, wherein the inner and outer diameter grinding processing comprises rough grinding processing of the outer diameter and the inner hole, and then carrying out finish grinding processing of the outer diameter and the inner hole, and processing the outer diameter to 140mm, the inner hole diameter to 50mm and the wall thickness deviation to 0.28 mm; and finally, drawing the pure quartz hollow sleeve into a pure quartz liner tube by using vertical fusion drawing equipment, wherein the outer diameter range of the drawn pure quartz liner tube is 25mm, the wall thickness is 4mm, the ovality is 0.02mm, and the offset wall is 0.04mm, and the detailed parameters of the liner tube are shown in table 1.
The vertical melting and stretching equipment comprises a vertical furnace body, wherein a cylindrical heating element is arranged on the upper part of the furnace body, the cylindrical heater comprises a graphite heating barrel 6 arranged above the furnace body, the periphery of the graphite heating barrel is coated with a heat insulation layer 5, an induction coil 4 is arranged outside the heat insulation layer, the inner diameter of the graphite heating barrel is about 170mm, the axial height of the graphite heating barrel is 500mm, the inner diameter of the induction coil is 310mm, and the axial height of the induction coil is 250 mm. The furnace mouth of the upper end of the furnace body is provided with a sealing gas ring 7, the sealing gas ring is communicated with a pressure inert gas source, and the inner diameter of the sealing gas ring is matched with the graphite heating cylinder to ensure the stable airflow in the furnace. A rod clamping device is arranged above the furnace body corresponding to the upper furnace mouth and is connected with a lifting mechanism to form a lifting rod clamping device. The lower part of the furnace body is provided with a traction wheel corresponding to the furnace outlet at the lower end, the traction wheel comprises a pair of traction wheels with parallel wheel shafts and constant speed and reverse rotation, and a radial constant pressure device is arranged between the pair of traction wheels.
TABLE 1 typical parameters of high grade quartz liner OD25mm WT4mm
Claims (10)
1. A method for preparing precise quartz liner tube is characterized in that OVD is used to prepare a pure quartz hollow tube blank, then the inner and outer diameters of the pure quartz hollow tube blank are ground to process a pure quartz hollow sleeve with small wall thickness deviation, and finally the pure quartz hollow sleeve is drawn into the pure quartz liner tube through vertical fusion drawing equipment.
2. The method of claim 1, wherein the grinding of the inner and outer diameters comprises rough grinding of the outer and inner diameters, followed by finish grinding of the outer and inner diameters.
3. The method for preparing a precise quartz liner tube according to claim 1 or 2, wherein the pure quartz hollow tube blank has a hydroxyl content of less than or equal to 1ppm by weight.
4. The method for preparing the precise quartz liner tube according to claim 1 or 2, wherein the outer diameter of the pure quartz hollow sleeve is processed to be less than or equal to 150mm, the aperture of an inner hole is processed to be 45-70 mm, and the wall thickness deviation of the unilateral tube wall is less than or equal to 0.3 mm.
5. The method for preparing the precise quartz liner tube according to claim 1 or 2, wherein the outer diameter of the pure quartz liner tube is 10-50 mm, the wall thickness is less than or equal to 5mm, the ovality is less than or equal to 0.05mm, and the wall thickness deviation of the single-side tube wall is less than or equal to 0.05 mm.
6. The vertical melting and stretching equipment for precise quartz lining pipes is characterized by comprising a vertical furnace body, wherein a cylindrical heating part is arranged at the upper part of the furnace body, a heat preservation layer is arranged at the periphery of the cylindrical heating part, a sealing gas ring is arranged at a furnace opening at the upper end of the furnace body, a rod clamping device is arranged above the furnace body corresponding to the furnace opening at the upper end, and a traction wheel is arranged below the furnace body corresponding to a furnace opening at the lower end.
7. The vertical type fusion drawing equipment for the precise quartz lining tube according to claim 6, wherein the cylindrical heater comprises a graphite heating tube arranged above the furnace body, the periphery of the graphite heating tube is coated with a heat insulation layer, and an induction coil is arranged outside the heat insulation layer.
8. The vertical type fusion drawing equipment for the precise quartz liner tube according to claim 7, wherein the graphite heating tube has an inner diameter of 160-210 mm and an axial height of 600-900 mm, and the induction coil has an inner diameter of 300-400 mm and an axial height of 150-400 mm.
9. A vertical fusion draw apparatus for precision quartz liner of claim 6 or claim 7 wherein the pulling rollers comprise a pair of constant velocity counter-rotating pulling rollers spaced parallel to each other on a shaft and a constant radial pressure device is disposed between the pair of pulling rollers.
10. The vertical type fusion drawing equipment for the precise quartz liner tube according to claim 6 or 7, wherein the heating temperature of the cylindrical heating element is 1900-2100 ℃, and the drawing linear speed of the drawing wheel is 500-800 mm/min; the sealing gas ring is communicated with an inert pressure gas source; the rod clamping device is connected with the lifting mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111009151.XA CN113651527A (en) | 2021-08-31 | 2021-08-31 | Preparation method of precise quartz liner tube and stretching equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111009151.XA CN113651527A (en) | 2021-08-31 | 2021-08-31 | Preparation method of precise quartz liner tube and stretching equipment thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113651527A true CN113651527A (en) | 2021-11-16 |
Family
ID=78493302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111009151.XA Pending CN113651527A (en) | 2021-08-31 | 2021-08-31 | Preparation method of precise quartz liner tube and stretching equipment thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113651527A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1000908A2 (en) * | 1998-10-08 | 2000-05-17 | Heraeus Quarzglas GmbH | Method for producing quartz glass preform for optical fibers |
| CN105985014A (en) * | 2015-02-28 | 2016-10-05 | 武汉长盈通光电技术有限公司 | Diamond cladded polarization maintaining optical fiber and manufacturing method thereof |
| CN109467311A (en) * | 2018-12-25 | 2019-03-15 | 特恩驰(南京)光纤有限公司 | A kind of induction receiver for fibre drawing furnace |
-
2021
- 2021-08-31 CN CN202111009151.XA patent/CN113651527A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1000908A2 (en) * | 1998-10-08 | 2000-05-17 | Heraeus Quarzglas GmbH | Method for producing quartz glass preform for optical fibers |
| CN105985014A (en) * | 2015-02-28 | 2016-10-05 | 武汉长盈通光电技术有限公司 | Diamond cladded polarization maintaining optical fiber and manufacturing method thereof |
| CN109467311A (en) * | 2018-12-25 | 2019-03-15 | 特恩驰(南京)光纤有限公司 | A kind of induction receiver for fibre drawing furnace |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108516668B (en) | Secondary drawing device and method for glass tube | |
| JP3406107B2 (en) | Manufacturing method of quartz glass | |
| AU6524498A (en) | Apparatus and method for overcladding optical fiber preform rod and optical fiber drawing method | |
| CN106541060A (en) | A kind of rolling production method of super-large diameter aluminium alloy integral loop | |
| CN105057987B (en) | Weldless aluminum alloy lining neck-spinning method for large-diameter composite air cylinder | |
| JP2755780B2 (en) | How to make a tube from glass material | |
| CN109465321B (en) | Manufacturing method of cylinder with annular inner reinforcing ribs | |
| CN109435220A (en) | Polytene corrugated tube and its expanding and shaping technique | |
| CN109437529B (en) | Method for manufacturing thick crystal bottom of glass cup | |
| CN201883025U (en) | Continuous quartz smelting furnace | |
| CN109133593A (en) | A kind of drawing optical fibers annealing device | |
| CN107010813A (en) | The adjustable crucible lifting formula quartz glass continuous induction melting furnace of molding zone temperatures | |
| WO2014036853A1 (en) | Large-size solid fiber preform, preparation method and device thereof | |
| CN113651527A (en) | Preparation method of precise quartz liner tube and stretching equipment thereof | |
| CN105170829A (en) | Aluminum alloy gas bottle shell nosing method capable of increasing wall thickness of pipe mouth | |
| CN206375813U (en) | Non-contact type quartz pushrod, quartz ampoule drawing device | |
| CN112159095A (en) | Optical fiber preform preparation device and preparation method | |
| CN108793692B (en) | Self-shaping method for gas-refining quartz glass ingot | |
| CN206970453U (en) | The adjustable crucible lifting formula quartz glass continuous induction melting furnace of molding zone temperatures | |
| CN103755136B (en) | A kind of Core rod clamp and method of cooling thereof | |
| CN104710106B (en) | A kind of induction furnace for preform collapsing | |
| CN213860648U (en) | Thick-walled pipe production system | |
| CN211896679U (en) | Vacuum wire drawing furnace for manufacturing optical fiber | |
| CN212770473U (en) | High-speed deposition device for carrying out outer cladding on loose body of optical fiber preform | |
| CN205088107U (en) | Gas smelts a tub combustor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211116 |