CN112340979B - Method for manufacturing optical fiber preform - Google Patents
Method for manufacturing optical fiber preform Download PDFInfo
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- CN112340979B CN112340979B CN202011241902.6A CN202011241902A CN112340979B CN 112340979 B CN112340979 B CN 112340979B CN 202011241902 A CN202011241902 A CN 202011241902A CN 112340979 B CN112340979 B CN 112340979B
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- tube
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- sleeve
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- 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
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
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- Organic Chemistry (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The application discloses optical fiber perform's manufacturing method, including the process of drying the sleeve pipe, the process of drying the sleeve pipe is: 1) Placing the sleeve into a drying tube, wherein the drying tube can be opened and closed, and closing the drying tube after the sleeve is placed; 2) The two plugs are respectively attached to two end faces of the drying tube in a sealing mode, one plug is movably provided with an air inlet tube, the air inlet tube is used for receiving gas for drying the sleeve, and the other plug is movably provided with an exhaust tube; 3) The axial position of the air inlet pipe is adjusted, so that one end of the air inlet pipe extends into the sleeve. According to the invention, the drying tube and the plug are used for replacing a plastic sleeve, and the position of the air inlet tube can be conveniently and reliably adjusted by sliding the air inlet tube arranged on the plug, so that one end of the air inlet tube is ensured to extend into the sleeve, and efficient drying operation is realized; the method is convenient to operate, can prevent waste and protects the environment.
Description
Technical Field
The invention relates to the field of optical fiber preforms, in particular to a manufacturing method of an optical fiber preform.
Background
At present, an optical fiber preform is mainly manufactured in two parts, namely core rod manufacturing and outer cladding manufacturing. The main processes for manufacturing the core rod mainly use VAD (axial vapor deposition), OVD (outside vapor deposition), MCVD (modified chemical vapor deposition) and PCVD (plasma chemical vapor deposition), and the outer cladding manufacturing process mainly comprises OVD (outside vapor deposition) and a sleeve method.
The casing method has the characteristics of high production efficiency and low cost. In actual operation, a tail pipe is welded at one end of a sleeve, a core rod is inserted into the sleeve through the tail pipe to form a preform, the preform formed by combining the sleeve and the core rod is sent to a wire drawing furnace to be drawn, and the tail pipe is clamped by a clamping device above the wire drawing furnace during wire drawing.
In process of production, need wash and dry the sheathed tube inner wall, entangle whole sleeve pipe (including the tail pipe) earlier with the plastic sheath when dry, then wear to establish the intake pipe and tie up the plastic sheath in the one end of plastic sheath, the one end of intake pipe gets into the intraductal wall of sleeve, and the other end is used for receiving dry gas (for example nitrogen gas), wears to establish the blast pipe and ties up the plastic sheath at the other end of plastic sheath, and this blast pipe is used for the gas outgoing plastic sheath in the plastic sheath. The existing drying mode needs to cover the plastic sleeve every time, the plastic sleeve needs to be taken out after drying is finished, the operation of the whole process is complex, and in addition, the plastic sleeve can only be used once and is relatively wasted.
Disclosure of Invention
The invention provides a method for manufacturing an optical fiber preform aiming at the problems.
The technical scheme adopted by the invention is as follows:
a method for manufacturing an optical fiber preform, comprising a step of drying a jacket tube, the step of drying the jacket tube comprising:
1) Placing a sleeve into a drying tube, wherein the drying tube can be opened and closed, and closing the drying tube after the sleeve is placed;
2) The two plugs are respectively attached to two end faces of the drying tube in a sealing mode, one plug is movably provided with an air inlet tube, the air inlet tube is used for receiving gas for drying the sleeve, and the other plug is movably provided with an exhaust tube;
3) The axial position of the air inlet pipe is adjusted, so that one end of the air inlet pipe extends into the sleeve.
According to the invention, the drying tube and the plug are used for replacing a plastic sleeve, and the position of the air inlet tube can be conveniently and reliably adjusted by sliding the air inlet tube arranged on the plug, so that one end of the air inlet tube is ensured to extend into the sleeve, and efficient drying operation is realized; the method is convenient to operate, can prevent waste and protects the environment.
In one embodiment of the present invention, the steps 1) to 3) are performed by a drying apparatus, and the drying apparatus includes:
the drying pipe comprises a lower semicircular pipe and an upper semicircular pipe which is in rotating fit with the lower semicircular pipe, and the drying pipe has an open state and a closed state;
the supporting seat is fixed on the lower semicircular pipe and used for supporting the sleeve;
the opening and closing mechanism is used for driving the upper semicircular pipe to rotate and controlling the drying pipe to be switched between an opening state and a closing state;
the first telescopic element is positioned below the drying pipe and comprises a first telescopic rod;
the first plug is positioned at the first end of the drying tube, is fixed with the first telescopic rod and can be close to or far away from the first end of the drying tube under the control of the first telescopic element;
the air inlet pipe is arranged on the first plug in a sliding manner;
the second telescopic element is positioned below the drying pipe and comprises a second telescopic rod;
the second plug is positioned at the second end of the drying tube and is fixed with the second telescopic rod, and the second plug can be close to or far away from the second end of the drying tube under the control of the second telescopic element;
the exhaust pipe is arranged on the second plug in a sliding mode, and one end of the exhaust pipe is used for extending into the tail pipe.
In actual use, the casing is moved by a crane or the like.
The working process of the drying device comprises the following steps: the opening and closing mechanism works to enable the drying tube to be in an open state, the sleeve is placed on the supporting seat in the lower semicircular tube through equipment such as a crane, and then the opening and closing mechanism works to enable the drying tube to be in a closed state; the first telescopic element retracts to enable the first plug to be abutted and matched with the first end of the drying tube, and the second telescopic element retracts to enable the second plug to be abutted and matched with the second end of the drying tube; and adjusting the position of the air inlet pipe to enable one end of the air inlet pipe to extend into the sleeve, and adjusting the position of the exhaust pipe, preferably, enabling one end of the exhaust pipe to extend into a tail pipe connected with the sleeve. The outer end of the air inlet pipe is butted with a dry air source, and the interior of the sleeve is subjected to continuous drying operation through dry gas (such as nitrogen).
In one embodiment of the present invention, the lower semicircular tube has a rotating shaft hole, the upper semicircular tube is fixed with a rotating shaft, and the rotating shaft extends into the rotating shaft hole; the mechanism that opens and shuts includes:
a mounting seat;
the control rod is fixed with the rotating shaft;
and the third telescopic element is rotatably arranged on the mounting seat and comprises a third telescopic rod, and the end part of the third telescopic rod is in running fit with the control rod.
In one embodiment of the present invention, the first telescopic element, the second telescopic element and the third telescopic element are all cylinders or electric push rods.
In an embodiment of the present invention, two end surfaces of the lower semicircular tube and the upper semicircular tube are respectively provided with a groove, when the drying tube is in a closed state, the two corresponding grooves form an annular groove, and one ends of the first plug and the second plug facing the drying tube are provided with a convex ring for sealing and matching with the corresponding annular groove.
Through the cooperation of annular groove and bulge loop, can effectively guarantee the sealed cooperation relation of end cap and drying tube.
In one embodiment of the present invention, each of the two plugs has an axially disposed through hole, a sealing ring is fixed on the through hole, the air inlet pipe is in sliding sealing fit with the corresponding sealing ring, and the air outlet pipe is in sliding sealing fit with the corresponding sealing ring.
The sealing ring is convenient to arrange, and has a good sealing effect when in sliding fit.
In one embodiment of the present invention, transparent viewing ports are disposed at both ends of the first plug and the second plug close to the drying tube.
Whether the air inlet pipe or the exhaust pipe is adjusted in place or not is conveniently judged through the transparent window.
In one embodiment of the present invention, a handle is disposed on an outer sidewall of an end of the air inlet pipe away from the drying pipe, and a handle is disposed on an outer sidewall of an end of the air outlet pipe away from the drying pipe.
The handle is arranged to facilitate the movement and adjustment operation of the air inlet pipe and the exhaust pipe.
In an embodiment of the present invention, the first plug is provided with a plurality of air inlet branch pipes on the outer side of the through hole, and the second plug is provided with a plurality of air outlet branch pipes on the outer side of the through hole.
The air inlet branch pipe and the air exhaust branch pipe are arranged, drying operation can be conducted on the outer side wall of the sleeve, and the drying process is better.
In one embodiment of the present invention, the exhaust system further includes a dryer, and the exhaust pipe and the exhaust branch pipe are connected to the dryer.
The dryer is arranged to absorb and dry the gas from the drying tube, and the dried gas can be stored separately or used as a drying gas source again.
The invention has the beneficial effects that: according to the invention, the drying tube and the plug are used for replacing a plastic sleeve, and the position of the air inlet tube can be conveniently and reliably adjusted by sliding the air inlet tube arranged on the plug, so that one end of the air inlet tube is ensured to extend into the sleeve, and efficient drying operation is realized; the method is convenient to operate, can prevent waste and protects the environment.
Description of the drawings:
FIG. 1 is a schematic view of the structure of a drying apparatus according to the present invention;
FIG. 2 is a schematic view of two plugs mated with a casing and liner;
FIG. 3 is an enlarged view at A in FIG. 1;
FIG. 4 is a schematic view with the plug hidden;
figure 5 is a schematic view of the first plug after it has been moved outwardly.
The various reference numbers in the figures are:
1. a drying tube; 2. a lower semicircular tube; 3. an upper semi-circular tube; 4. a supporting base; 5. an opening and closing mechanism; 6. a first telescopic element; 7. a first telescopic rod; 8. a first plug; 9. a first end of the drying tube; 10. an air inlet pipe; 11. a second telescopic element; 12. a second telescopic rod; 13. a second plug; 14. a second end of the drying tube; 15. an exhaust pipe; 16. a rotating shaft hole; 17. a rotating shaft; 18. a mounting seat; 19. a control lever; 20. a third telescopic element; 21. a groove; 22. an annular groove; 23. a convex ring; 24. a through hole; 25. a seal ring; 26. a handle; 27. exhaust branch pipe; 28. air inlet branch pipes; 29. a sleeve; 30. a tail pipe; 31. and a third telescopic rod.
The specific implementation mode is as follows:
the present invention will now be described in detail with reference to the drawings.
As shown in fig. 1, a method for manufacturing an optical fiber preform includes a step of drying a jacket tube 29, and the step of drying the jacket tube 29 includes:
1) The sleeve 29 is placed in the drying tube 1, the drying tube 1 can be opened and closed, and the drying tube 1 is closed after the sleeve 29 is placed;
2) The two plugs are respectively attached to two end faces of the drying tube 1 in a sealing manner, wherein one plug is movably provided with an air inlet pipe 10, the air inlet pipe 10 is used for receiving gas for drying the sleeve 29, and the other plug is movably provided with an exhaust pipe 15;
3) The axial position of the inlet pipe 10 is adjusted so that one end of the inlet pipe 10 extends into the sleeve 29.
According to the invention, the drying tube 1 and the plug are used for replacing a plastic sleeve, and the position of the air inlet tube 10 can be conveniently and reliably adjusted by sliding the air inlet tube 10 arranged on the plug, so that one end of the air inlet tube 10 is ensured to extend into the sleeve 29, and efficient drying operation is realized; the method is convenient to operate, can prevent waste and protects the environment.
As shown in fig. 1 to 5, in the present embodiment, steps 1) to 3) are performed by a drying apparatus including:
the drying tube 1 comprises a lower semicircular tube 2 and an upper semicircular tube 3 which is rotationally matched with the lower semicircular tube 2, and the drying tube 1 has an open state and a closed state;
the supporting seat 4 is fixed on the lower semicircular pipe 2 and used for supporting the sleeve 29;
the opening and closing mechanism 5 is used for driving the upper semicircular tube 3 to rotate and controlling the drying tube 1 to be switched between an opening state and a closing state;
a first telescopic element 6 located below the drying duct 1, the first telescopic element 6 comprising a first telescopic rod 7;
the first plug 8 is positioned at the first end 9 of the drying tube, the first plug 8 is fixed with the first telescopic rod 7, and the first plug 8 can be close to or far away from the first end 9 of the drying tube under the control of the first telescopic element 6;
the air inlet pipe 10 is arranged on the first plug 8 in a sliding mode, and one end of the air inlet pipe 10 is used for extending into the sleeve 29;
a second telescopic member 11 located below the drying duct 1, the second telescopic member 11 comprising a second telescopic rod 12;
the second plug 13 is positioned at the second end 14 of the drying tube, the second plug 13 is fixed with the second telescopic rod 12, and the second plug 13 can be close to or far away from the second end 14 of the drying tube under the control of the second telescopic element 11;
and the exhaust pipe 15 is arranged on the second plug 13 in a sliding mode.
In actual use, the sleeve 29 is moved by a crane or the like.
The working process of the drying device comprises the following steps: the opening and closing mechanism 5 works to enable the drying pipe 1 to be in an open state, the sleeve 29 is placed on the supporting seat 4 in the lower semicircular pipe 2 through equipment such as a crane, and then the opening and closing mechanism 5 works to enable the drying pipe 1 to be in a closed state; the first telescopic element 6 retracts to enable the first plug 8 to be abutted and matched with the first end 9 of the drying tube, and the second telescopic element 11 retracts to enable the second plug 13 to be abutted and matched with the second end 14 of the drying tube; the position of the inlet pipe 10 is adjusted so that one end of the inlet pipe 10 protrudes into the sleeve 29, and the position of the outlet pipe 15 is adjusted, preferably, so that one end of the outlet pipe 15 protrudes into the tail pipe 30 connected to the sleeve. The outer end of the inlet tube 10 is docked with a source of drying gas and the interior of the sleeve 29 is subjected to a continuous drying operation by means of a drying gas, such as nitrogen.
As shown in fig. 3, in the present embodiment, the lower semicircular tube 2 has a rotating shaft hole 16, the upper semicircular tube 3 is fixed with a rotating shaft 17, and the rotating shaft 17 extends into the rotating shaft hole 16; the opening and closing mechanism 5 includes:
a mounting seat 18;
a control rod 19 fixed with the rotating shaft 17;
and the third telescopic element 20 is rotatably installed on the installation seat 18, the third telescopic element 20 comprises a third telescopic rod 31, and the end part of the third telescopic rod 31 is rotatably matched with the control rod 19.
In practical use, the first telescopic element 6, the second telescopic element 11 and the third telescopic element 20 are all cylinders or electric push rods.
As shown in fig. 2 and 4, in the present embodiment, the lower semicircular tube 2 and the upper semicircular tube 3 have grooves 21 on both end surfaces, when the drying tube 1 is in the closed state, the two corresponding grooves 21 form an annular groove 22, and the ends of the first plug 8 and the second plug 13 facing the drying tube 1 have convex rings 23, and the convex rings 23 are used for being in sealing fit with the corresponding annular grooves 22.
Through the cooperation of annular groove 22 and bulge loop 23, can effectively guarantee the sealed cooperation relation of end cap and drying tube 1.
As shown in fig. 1 and 2, in the present embodiment, each of the two plugs has a through hole 24 disposed in the axial direction, a sealing ring 25 is fixed on the through hole 24, the air inlet pipe 10 is in sliding sealing engagement with the corresponding sealing ring 25, and the air outlet pipe 15 is in sliding sealing engagement with the corresponding sealing ring 25.
The sealing ring 25 is convenient to arrange, and has a good sealing effect when being in sliding fit.
During actual use, transparent observation ports are arranged at one ends, close to the drying tube 1, of the first plug 8 and the second plug 13. Whether the air inlet pipe 10 or the air outlet pipe 15 is adjusted in place or not is conveniently judged through the transparent window.
As shown in fig. 1 and 2, in the present embodiment, the outer side wall of the air inlet pipe 10 at the end far away from the drying duct 1 has a handle 26, and the outer side wall of the air outlet pipe 15 at the end far away from the drying duct 1 has a handle 26. The handle 26 is provided to facilitate the movement adjustment operation of the intake duct 10 and the exhaust duct 15.
As shown in fig. 1 and 2, in the present embodiment, the first plug 8 is provided with a plurality of air inlet branch pipes 28 on the outer side of the through hole 24, and the second plug 13 is provided with a plurality of air outlet branch pipes 27 on the outer side of the through hole 24. The air inlet branch pipe 28 and the air outlet branch pipe 27 are arranged, so that the outer side wall of the sleeve 29 can be dried, and the drying process is better.
In actual use, a dryer may be provided, and the exhaust pipe 15 and the exhaust branch pipe 27 may be connected to the dryer. The dryer is arranged to absorb and dry the gas from the drying tube 1, and the dried gas can be stored separately or used again as a drying gas source.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, which are directly or indirectly applied to other related technical fields, are also included in the scope of the present invention.
Claims (9)
1. A method for manufacturing an optical fiber preform, comprising a step of drying a jacket tube, the step of drying the jacket tube comprising:
1) Placing a sleeve into a drying tube, wherein the drying tube can be opened and closed, and closing the drying tube after the sleeve is placed;
2) The two plugs are respectively attached to two end faces of the drying tube in a sealing mode, one plug is movably provided with an air inlet tube, the air inlet tube is used for receiving gas for drying the sleeve, and the other plug is movably provided with an exhaust tube;
3) Adjusting the axial position of the air inlet pipe to enable one end of the air inlet pipe to extend into the sleeve;
the steps 1) to 3) are performed by a drying apparatus including:
the drying pipe comprises a lower semicircular pipe and an upper semicircular pipe which is in rotating fit with the lower semicircular pipe, and the drying pipe has an open state and a closed state;
the supporting seat is fixed on the lower semicircular pipe and used for supporting the sleeve;
the opening and closing mechanism is used for driving the upper semi-circular pipe to rotate and controlling the drying pipe to be switched between an opening state and a closing state;
the first telescopic element is positioned below the drying pipe and comprises a first telescopic rod;
the first plug is positioned at the first end of the drying tube, is fixed with the first telescopic rod and can be close to or far away from the first end of the drying tube under the control of the first telescopic element;
the air inlet pipe is arranged on the first plug in a sliding mode, and one end of the air inlet pipe extends into the sleeve when the air inlet pipe works;
the second telescopic element is positioned below the drying pipe and comprises a second telescopic rod;
the second plug is positioned at the second end of the drying tube and is fixed with the second telescopic rod, and the second plug can be close to or far away from the second end of the drying tube under the control of the second telescopic element;
and the exhaust pipe is arranged on the second plug in a sliding manner, and one end of the air inlet pipe extends into the tail pipe connected with the sleeve pipe when the exhaust pipe works.
2. The method for fabricating an optical fiber preform according to claim 1, wherein the lower semicircular tube has a rotation shaft hole, and the upper semicircular tube has a rotation shaft fixed thereto, the rotation shaft extending into the rotation shaft hole; the mechanism that opens and shuts includes:
a mounting seat;
the control rod is fixed with the rotating shaft;
and the third telescopic element is rotatably arranged on the mounting seat and comprises a third telescopic rod, and the end part of the third telescopic rod is in running fit with the control rod.
3. A method for fabricating an optical fiber preform according to claim 2, wherein the first, second and third telescopic members are all a cylinder or an electric push rod.
4. A method for fabricating an optical fiber preform according to claim 1, wherein the lower semicircular tube and the upper semicircular tube have grooves at both end surfaces thereof, the corresponding grooves form annular grooves when the drying tube is in a closed state, and the ends of the first and second plugs facing the drying tube have protruding rings for sealing engagement with the corresponding annular grooves.
5. A method for fabricating an optical fiber preform according to claim 1, wherein both plugs have axially disposed through holes, the through holes having sealing rings fixed thereto, the gas inlet tube is in sliding sealing engagement with the corresponding sealing ring, and the gas outlet tube is in sliding sealing engagement with the corresponding sealing ring.
6. The method for fabricating an optical fiber preform according to claim 5, wherein the first plug and the second plug are provided with a transparent viewing port at an end thereof adjacent to the drying tube.
7. The method for fabricating an optical fiber preform according to claim 6, wherein an outer sidewall of an end of the gas inlet tube remote from the drying tube has a handle, and an outer sidewall of an end of the gas outlet tube remote from the drying tube has a handle.
8. The method for fabricating an optical fiber preform according to claim 1, wherein the first plug is formed with a plurality of gas inlet branched tubes at an outer side of the through-hole, and the second plug is formed with a plurality of gas exhaust branched tubes at an outer side of the through-hole.
9. The method for fabricating an optical fiber preform according to claim 8, further comprising a dryer, wherein the exhaust pipe and the exhaust branch pipe are connected to the dryer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011241902.6A CN112340979B (en) | 2020-11-09 | 2020-11-09 | Method for manufacturing optical fiber preform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011241902.6A CN112340979B (en) | 2020-11-09 | 2020-11-09 | Method for manufacturing optical fiber preform |
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| CN112340979A CN112340979A (en) | 2021-02-09 |
| CN112340979B true CN112340979B (en) | 2022-11-08 |
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| CN202011241902.6A Active CN112340979B (en) | 2020-11-09 | 2020-11-09 | Method for manufacturing optical fiber preform |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113277725B (en) * | 2021-06-04 | 2022-09-20 | 杭州富通通信技术股份有限公司 | Processing technology of prefabricated rod |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202945158U (en) * | 2012-12-05 | 2013-05-22 | 长飞光纤光缆有限公司 | Vacuum-pumping external sealing device for optical fiber preform rod sleeve |
| CN103011578B (en) * | 2012-12-17 | 2014-12-24 | 中天科技精密材料有限公司 | Device and method for manufacturing depressed cladding super-low water peak fiber mandril |
| CN106396361A (en) * | 2016-08-26 | 2017-02-15 | 江苏亨通光导新材料有限公司 | Optical fiber perform rod casing tube sintering device, and sintering method thereof |
| CN207702903U (en) * | 2017-11-28 | 2018-08-07 | 淄博松阳锆业科技有限公司 | A kind of ferrule production drying unit |
| CN108675626A (en) * | 2018-04-10 | 2018-10-19 | 中国科学院西安光学精密机械研究所 | Optical fiber preform sleeving method for reducing rod-tube interface impurities and hydroxyl content |
| CN211010403U (en) * | 2019-10-16 | 2020-07-14 | 南阳市安运石油钻采设备有限公司 | Injection type sealing and leaking stoppage device |
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