CN110357413B - Sealing device and sealing method for wire drawing furnace for wire drawing of prefabricated rod - Google Patents
Sealing device and sealing method for wire drawing furnace for wire drawing of prefabricated rod Download PDFInfo
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- CN110357413B CN110357413B CN201910543209.5A CN201910543209A CN110357413B CN 110357413 B CN110357413 B CN 110357413B CN 201910543209 A CN201910543209 A CN 201910543209A CN 110357413 B CN110357413 B CN 110357413B
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- sealing 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
- C03B37/02—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
- C03B37/029—Furnaces therefor
Abstract
The application relates to a sealing device and a sealing method of a wire drawing furnace for drawing a prefabricated rod, wherein the sealing device comprises: the sealing sleeve is hermetically connected at the inlet of the wire drawing furnace, a quartz sliver with one fixed end is arranged on the inner wall of the sealing sleeve in a ring mode, and a through hole for the other end of the quartz sliver to penetrate through the sealing sleeve is formed in the side wall of the sealing sleeve; the output end of the rotary driving motor is rotationally connected with a rotating shaft rod for fixing the quartz sliver, and the tension of the quartz sliver outside the sealing sleeve can be adjusted through rotation; the tension sensor is used for detecting the tension of the quartz sliver outside the sealing sleeve; and the controller can control the rotary driving motor to regulate and control the rotating speed and the rotating direction of the rotating shaft rod according to the tension value detected by the tension sensor and the target tension value. The application also provides a sealing method using the sealing device, and the tightness of the quartz sliver in the sealing sleeve is adjusted at any time by controlling the tension of the quartz sliver outside the sealing sleeve, so that the sealing effect of the wire drawing furnace is optimized.
Description
Technical Field
The application belongs to the technical field of optical fiber production, and particularly relates to a sealing device and a sealing method of a wire drawing furnace for drawing a preform rod.
Background
In the production process of optical fibers, the sealing performance of the drawing furnace is of great importance, and the good sealing device of the drawing furnace can prevent air from entering the drawing furnace and being oxidized with a graphite piece, and can ensure the stability of process gas in the drawing furnace and avoid influencing the strength and quality of the optical fibers.
At present the wire drawing stove sealing device that most producer adopted, as shown in figure 1, mainly set up quartz ring 2 at 1 mouthful of wire drawing stove, and install the quartz cotton in quartz ring 2 and wrap up optical fiber perform 3, this kind of sealing device need carry out supporting selection according to 3 diameter sizes of different perform, and along with optical fiber perform 3 diameter do more big more, the diameter change grow of single stick different positions, need the manual work to carry out the adjusting position to the quartz cotton at any time in process of production just can guarantee sealed effect, in addition because perform 3 diameter is littleer and more at wire drawing in-process, can produce gap and continuous grow gradually between the quartz cotton in perform 3 and the sealing device, can't reach ideal sealed effect.
In addition, in order to improve prefabricated excellent wire drawing efficiency, more and more optical fiber manufacturers adopt the technique (as shown in figure 1) of 4 butt fusion prefabricated stick 3 of minor diameter, but along with the increase of prefabricated stick 3 diameter, hang the diameter difference of establishing the tail stick 4 that prefabricated stick 3 used and prefabricated stick 3 and also at the grow, make when tail stick 4 gets into behind the wire drawing stove 1 and cause comparatively obvious influence to the air current in the stove, lead to wire drawing tension to reduce, the optical fiber attenuation grow, the undulant phenomenon such as great of fiber diameter, still the life of greatly reduced graphite heat-generating body.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the sealing device and the sealing method for the wire drawing furnace for the prefabricated rod wire drawing are provided for solving the defects that the sealing effect of the sealing device for the wire drawing furnace in the prior art is poor and the sealing device does not have universality aiming at the optical fiber prefabricated rods with different diameters.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a sealing device of a wire drawing furnace for drawing a preform rod comprises:
the device comprises a sealing sleeve, a tail rod and a base, wherein the sealing sleeve is hermetically connected to an inlet of a wire drawing furnace, through which a prefabricated rod and the tail rod pass, on the wire drawing furnace, a quartz sliver with one end fixed on the inner wall of the sealing sleeve is arranged on the inner wall of the sealing sleeve in a circle mode, and a through hole through which the other end of the quartz sliver passes out of the sealing sleeve is formed in the side wall of the sealing sleeve;
the output end of the rotary driving motor is rotatably connected with a rotating shaft rod, the rotating shaft rod is used for fixing the quartz cotton sliver penetrating out of the through hole of the sealing sleeve, and the tension of the quartz cotton sliver outside the sealing sleeve can be adjusted through rotation;
the tension sensor is used for detecting the tension of the quartz sliver outside the sealing sleeve;
and the controller is connected with the tension sensor and the rotary driving motor, and can control the rotary driving motor to regulate and control the rotating speed and the rotating direction of the rotating shaft according to the received comparison result of the tension value of the quartz sliver outside the sealing sleeve detected by the tension sensor and the target tension value.
Preferably, the quartz sliver is disposed within a helical groove disposed on an inner wall of the sealing sleeve.
Preferably, the quartz sliver is arranged in a spiral channel formed by an upper flange and a lower flange which are correspondingly arranged on the inner wall of the sealing sleeve.
Preferably, the number of turns of the quartz sliver arranged in a circle on the inner wall of the sealing sleeve is 2-4.
Preferably, the sealing device of the drawing furnace further comprises a tension display connected with the controller.
Preferably, the sealing sleeve is made of metal.
Preferably, a water cooling cavity is arranged in the side wall of the sealing sleeve, and two ends of the water cooling cavity are respectively connected with the water inlet and the water outlet.
Preferably, the upper surface of the sealing sleeve is provided with a quartz ring which is communicated with the sealing sleeve, and the quartz ring is a full ring or a full ring formed by butt joint of two half rings.
The invention also provides a drawing and sealing method of the prefabricated rod, which comprises the following steps:
the method comprises the following steps that a sealing sleeve is hermetically connected to an inlet of a wire drawing furnace, through which a prefabricated rod and a tail rod pass, on the wire drawing furnace, a quartz sliver with one end fixed on the inner wall of the sealing sleeve is arranged on the inner wall of the sealing sleeve in a circle mode, and a through hole is formed in the side wall of the sealing sleeve;
the other end of the quartz cotton sliver penetrates out of the through hole of the sealing sleeve, and the quartz cotton sliver penetrating out of the through hole of the sealing sleeve is fixed by using a rotating shaft rod which is rotationally connected with the output end of the rotary driving motor;
the tension sensor is used for detecting the tension of the quartz sliver outside the sealing sleeve in real time, the controller is used for comparing the received tension value detected by the tension sensor with a target tension value, and the controller is used for controlling the rotary driving motor to regulate and control the rotating speed and the rotating direction of the rotating shaft rod according to the comparison result, so that the tension of the quartz sliver outside the sealing sleeve tends to the target tension value.
Preferably, the target tension value is 0.05-0.1N.
The invention has the beneficial effects that:
according to the sealing device and the sealing method for the prefabricated rod wire drawing, the tension value of the quartz sliver outside the sealing sleeve is detected in real time by the tension sensor, the controller compares the received tension value detected by the tension sensor with the target tension value, and controls the rotary driving motor according to the comparison result to regulate and control the rotating speed and the rotating direction of the rotating shaft rod so as to automatically adjust the tightness of the quartz sliver in the sealing sleeve along with the diameter change of the prefabricated rod or the tail rod, so that the sealing effect is metered, the sealing effect of the wire drawing furnace is optimized, the optical fiber strength after the prefabricated rod is drawn and the stability of air flow and a temperature field in the furnace are ensured, the service life of a graphite part is prolonged, the production cost of an optical fiber is reduced, and the sealing device and the sealing method have greater popularization and application values; in addition, the sealing device of the wire drawing furnace has universality aiming at optical fiber preforms with different diameters, the diameter matching of the sealing device is not needed, and the possibility of errors is reduced.
Drawings
The technical solution of the present application is further explained below with reference to the drawings and the embodiments.
FIG. 1 is a schematic structural view of a sealing device of a drawing furnace for drawing a preform in the prior art;
fig. 2 is a schematic structural view of a state of use of a sealing device of a drawing furnace for drawing a preform according to an embodiment of the present application.
Fig. 3 is a sectional view of a sealing sleeve of a sealing device of a drawing furnace according to an embodiment of the present application.
The reference numbers in the figures are: 1-wire drawing furnace, 2-quartz ring, 3-prefabricated rod, 4-tail rod, 5-quartz sliver, 6-rotary driving motor, 7-rotating shaft rod, 8-sealing sleeve, 81-through hole and 82-groove.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art through specific situations.
The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example 1
The present embodiment provides a sealing device for a drawing furnace for drawing a preform, as shown in fig. 2, including:
the sealing sleeve 8 is connected to the inlet of the wire drawing furnace 1 in a sealing manner, through which the preform rod 3 and the tail rod 4 pass, the inner wall of the sealing sleeve 8 is provided with a quartz cotton sliver 5 with one end fixed on the inner wall of the sealing sleeve 8 in a looping manner, and the side wall of the sealing sleeve 8 is provided with a through hole 81 through which the other end of the quartz cotton sliver 5 passes out of the sealing sleeve 8;
the output end of the rotary driving motor 6 is rotatably connected with a rotating shaft rod 7, and the rotating shaft rod 7 is used for fixing the quartz cotton sliver 5 which penetrates out of the through hole 81 of the sealing sleeve 8 and adjusting the tension of the quartz cotton sliver 5 outside the sealing sleeve 8 through rotation;
the tension sensor is used for detecting the tension of the quartz sliver 5 outside the sealing sleeve 8;
and the controller is connected with the tension sensor and the rotary driving motor 6, and can control the rotary driving motor 6 according to the received comparison result of the tension value of the quartz cotton sliver outside the sealing sleeve 8, detected by the tension sensor, and the target tension value so as to regulate and control the rotating speed and the rotating direction of the rotating shaft rod 7.
As shown in fig. 3, the quartz pledget 5 is preferably disposed within a helical groove 82 disposed on the inner wall of the sealing barrel 8; alternatively, the quartz sliver 5 may be disposed in a spiral channel formed by an upper flange and a lower flange correspondingly disposed on the inner wall of the sealing sleeve 8.
Preferably, the number of turns of the quartz sliver circularly arranged on the inner wall of the sealing sleeve 8 is 2-4 turns (such as 2 turns, 3 turns and 4 turns), and the number of turns is 3 turns in this embodiment, so that the rotary driving motor 6 and the spindle rod 7 can effectively control the tightness of the quartz sliver 5 in the sealing sleeve 8, and the sealing effect is optimized.
In this embodiment, the sealing device of the drawing furnace further comprises a tension display connected with the controller, the controller outputs a measurement result to the tension display by receiving and processing an electric signal of the tension sensor, and the tension display can monitor the tension value of the quartz sliver 5 outside the sealing sleeve 8 in real time.
In this embodiment, sealing sleeve 8 is the metal material, like stainless steel, like this can not produce stress cracking through going up and down the temperature many times like the quartz material, also can not lead to local breakage because of the collision and influence sealed effect.
In this embodiment, be equipped with the water-cooling chamber in the lateral wall of sealed sleeve 8, water inlet and delivery port are connected respectively to the water-cooling chamber both ends, can carry out effectual cooling to sealed sleeve 8 through the flow of water-cooling intracavity circulating water, prevent that the 5 pieces of quartz silver that high temperature produced from falling into 1 furnace bodies of wire drawing stove and influencing the optic fibre quality, on the other hand also can reduce the consumption of quartz silver 5.
In order to further increase the gas seal effect of the sealing device of the wire drawing furnace, a quartz ring which is communicated with the sealing sleeve 8 is arranged at the upper part of the sealing sleeve 8, the quartz ring is tightly attached to the upper surface of the sealing sleeve 8, and the quartz ring is a full-circle ring or a full-circle ring formed by butting two semi-rings. Since the quartz ring is added before drawing, there is no danger of high temperature operation, and it acts as a second line of defense and can perform a gas seal function when the sealing sleeve 8 leaks gas.
Before the wire drawing, the sealing device of the wire drawing furnace of the invention passes the prefabricated rod 3 through the sealing sleeve 8 and slowly extends into the wire drawing furnace 1, the tail rod 4 is left outside the wire drawing furnace 1, then along with the wire drawing of the prefabricated rod 3 and the entering of the tail rod 4 into the wire drawing furnace 1, a gap is gradually generated between the prefabricated rod 3 or the tail rod 4 and the sealing sleeve 8, at the moment, the tension sensor can detect the tension value of the quartz cotton sliver 5 outside the sealing sleeve 8 in real time, the controller can control the rotary driving motor 6 to regulate and control the rotating speed and the rotating direction of the rotating shaft rod 7 according to the received tension value and the target tension value detected by the tension sensor, and then the rotating shaft rod 7 can adjust the tension of the quartz cotton sliver 5 outside the sealing sleeve 8 and the tightness of the quartz cotton sliver 5 in the sealing sleeve 8 by rotating and loosening the quartz cotton sliver 5, thereby ensuring the sealing effect of the wire drawing furnace 1 and effectively ensuring the strength of the finished optical fiber, meanwhile, the oxidation loss of the graphite fittings caused by oxygen entering the furnace can be effectively avoided.
Example 2
This example provides a method for sealing a drawn preform using the sealing device of the drawing furnace for drawing a preform described in example 1, which includes the steps of:
a sealing sleeve 8 is hermetically connected to an inlet of the wire drawing furnace, through which the preform rod 3 and the tail rod 4 pass, on the wire drawing furnace 1, a quartz sliver 5 with one end fixed to the inner wall of the sealing sleeve 8 is arranged on the inner wall of the sealing sleeve 8 in a looped manner, and a through hole 81 is formed in the side wall of the sealing sleeve 8;
the other end of the quartz cotton strip 5 penetrates out of the through hole 81 of the sealing sleeve 8, and the quartz cotton strip 5 penetrating out of the through hole 81 of the sealing sleeve 8 is fixed by using a rotating shaft rod 7 which is rotationally connected with the output end of the rotary driving motor 6;
the tension of the quartz cotton sliver 5 outside the sealing sleeve 8 is detected in real time through the tension sensor, the controller compares the received tension value detected by the tension sensor with a target tension value, and controls the rotary driving motor 6 to regulate and control the rotating speed and the rotating direction of the rotating shaft rod 7 according to the comparison result, so that the tension of the quartz cotton sliver 5 outside the sealing sleeve 8 tends to the target tension value.
In the embodiment, the target tension value is 0.05-0.1N, and the tension value range can enable the tightness of the quartz sliver 5 in the sealing sleeve 8 to be moderate, so that the sealing effect of the wire drawing furnace 1 is optimized.
In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The utility model provides a perform wire drawing furnace sealing device for wire drawing which characterized in that includes:
the device comprises a sealing sleeve (8) which is connected to the inlet of the wire drawing furnace (1) in a sealing manner and is used for a prefabricated rod (3) and a tail rod (4) to pass through, wherein a quartz cotton sliver (5) with one end fixed on the inner wall of the sealing sleeve (8) is arranged on the inner wall of the sealing sleeve (8) in a looping manner, and a through hole (81) through which the other end of the quartz cotton sliver (5) penetrates out of the sealing sleeve (8) is formed in the side wall of the sealing sleeve (8); the quartz cotton strip (5) is arranged in a spiral groove (82) arranged on the inner wall of the sealing sleeve (8) or in a spiral channel formed by an upper flange and a lower flange which are correspondingly arranged on the inner wall of the sealing sleeve (8); a water cooling cavity is arranged in the side wall of the sealing sleeve (8), and two ends of the water cooling cavity are respectively connected with the water inlet and the water outlet;
the output end of the rotary driving motor (6) is rotatably connected with a rotating shaft rod (7), the rotating shaft rod (7) is used for fixing the quartz cotton sliver (5) penetrating out of the through hole (81) of the sealing sleeve (8), and the tension of the quartz cotton sliver (5) outside the sealing sleeve (8) can be adjusted through rotation;
the tension sensor is used for detecting the tension of the quartz cotton sliver (5) outside the sealing sleeve (8);
and the controller is connected with the tension sensor and the rotary driving motor (6), and can control the rotary driving motor (6) according to the received comparison result between the tension value of the quartz cotton sliver outside the sealing sleeve (8) detected by the tension sensor and the target tension value so as to regulate and control the rotating speed and the rotating direction of the rotating shaft rod (7).
2. The preform draw furnace sealing arrangement according to claim 1, characterised in that the number of turns of the quartz sliver arranged in a circle on the inner wall of the sealing sleeve (8) is 2-4 turns.
3. The apparatus of claim 1, further comprising a tension display connected to the controller.
4. A furnace sealing device for drawing a preform according to claim 1, characterised in that said sealing sleeve (8) is made of metal.
5. The sealing device of a drawing furnace for drawing a preform according to claim 1, wherein the sealing sleeve (8) has a quartz ring on its upper surface, which is a full ring or a full ring formed by two half rings butted together, and which is communicated with the sealing sleeve (8).
6. A preform drawing and sealing method is characterized by comprising the following steps:
a sealing sleeve (8) is hermetically connected to an inlet of the wire drawing furnace, through which a preform rod (3) and a tail rod (4) pass, on the wire drawing furnace (1), a quartz cotton sliver (5) with one end fixed to the inner wall of the sealing sleeve (8) is arranged on the inner wall of the sealing sleeve (8) in a looped manner, and a through hole (81) is formed in the side wall of the sealing sleeve (8); the quartz cotton strip (5) is arranged in a spiral groove (82) arranged on the inner wall of the sealing sleeve (8) or in a spiral channel formed by an upper flange and a lower flange which are correspondingly arranged on the inner wall of the sealing sleeve (8); a water cooling cavity is arranged in the side wall of the sealing sleeve (8), and two ends of the water cooling cavity are respectively connected with the water inlet and the water outlet;
the other end of the quartz cotton sliver (5) penetrates out of a through hole (81) of the sealing sleeve (8), and the quartz cotton sliver (5) penetrating out of the through hole (81) of the sealing sleeve (8) is fixed by a rotating shaft rod (7) which is rotationally connected with the output end of the rotary driving motor (6);
the tension of the quartz cotton sliver (5) outside the sealing sleeve (8) is detected in real time through the tension sensor, the controller compares the received tension value detected by the tension sensor with a target tension value, and controls the rotary driving motor (6) to regulate and control the rotating speed and the rotating direction of the rotating shaft rod (7) according to the comparison result, so that the tension of the quartz cotton sliver (5) outside the sealing sleeve (8) tends to the target tension value.
7. The preform draw sealing method according to claim 6, characterized in that the target tension value is 0.05-0.1N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910543209.5A CN110357413B (en) | 2019-06-21 | 2019-06-21 | Sealing device and sealing method for wire drawing furnace for wire drawing of prefabricated rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910543209.5A CN110357413B (en) | 2019-06-21 | 2019-06-21 | Sealing device and sealing method for wire drawing furnace for wire drawing of prefabricated rod |
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| Publication Number | Publication Date |
|---|---|
| CN110357413A CN110357413A (en) | 2019-10-22 |
| CN110357413B true CN110357413B (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910543209.5A Active CN110357413B (en) | 2019-06-21 | 2019-06-21 | Sealing device and sealing method for wire drawing furnace for wire drawing of prefabricated rod |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012076972A (en) * | 2010-10-05 | 2012-04-19 | Sumitomo Electric Ind Ltd | Seal structure for optical fiber preform |
| CN102838275A (en) * | 2012-08-28 | 2012-12-26 | 长飞光纤光缆有限公司 | Wiredrawing method and wiredrawing device for outer diameter fluctuation optical fiber perform |
| CN105271708A (en) * | 2015-11-18 | 2016-01-27 | 通鼎互联信息股份有限公司 | Device for preventing blow-by oxidation of optical fiber wire drawing furnace and control method |
| JP2017007899A (en) * | 2015-06-23 | 2017-01-12 | 株式会社フジクラ | Production method for optical fiber preform, optical fiber preform, and production method for optical fiber |
| CN109384382A (en) * | 2018-11-27 | 2019-02-26 | 通鼎互联信息股份有限公司 | A kind of sealing device of fibre drawing furnace |
-
2019
- 2019-06-21 CN CN201910543209.5A patent/CN110357413B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012076972A (en) * | 2010-10-05 | 2012-04-19 | Sumitomo Electric Ind Ltd | Seal structure for optical fiber preform |
| CN102838275A (en) * | 2012-08-28 | 2012-12-26 | 长飞光纤光缆有限公司 | Wiredrawing method and wiredrawing device for outer diameter fluctuation optical fiber perform |
| JP2017007899A (en) * | 2015-06-23 | 2017-01-12 | 株式会社フジクラ | Production method for optical fiber preform, optical fiber preform, and production method for optical fiber |
| CN105271708A (en) * | 2015-11-18 | 2016-01-27 | 通鼎互联信息股份有限公司 | Device for preventing blow-by oxidation of optical fiber wire drawing furnace and control method |
| CN109384382A (en) * | 2018-11-27 | 2019-02-26 | 通鼎互联信息股份有限公司 | A kind of sealing device of fibre drawing furnace |
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| CN110357413A (en) | 2019-10-22 |
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