CN106746592B - Water-cooling air sealing device of optical fiber drawing furnace - Google Patents
Water-cooling air sealing device of optical fiber drawing furnace Download PDFInfo
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- CN106746592B CN106746592B CN201611167438.4A CN201611167438A CN106746592B CN 106746592 B CN106746592 B CN 106746592B CN 201611167438 A CN201611167438 A CN 201611167438A CN 106746592 B CN106746592 B CN 106746592B
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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
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/60—Optical fibre draw furnaces
- C03B2205/80—Means for sealing the preform entry or upper end of the furnace
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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Abstract
A water-cooling air sealing device of an optical fiber drawing furnace comprises a base, a water cooling cavity, a base water cooling cavity partition plate, a base water inlet pipe connector, a base water return pipe connector and a base through hole in the center, wherein the base is provided with the base water cooling cavity; the graphite felt baffle ring is supported on the base, and a graphite felt accommodating cavity is formed in the center of the graphite felt baffle ring; the optical fiber perform sealing matching hole in the center of the graphite felt group corresponds to and is communicated with the base through hole; the air sealing cylinder is supported on the graphite felt baffle ring, a water cooling separation cavity of the air sealing cylinder is arranged on the air sealing cylinder, a water-stop sheet is arranged in the cavity, the lower part of one side corresponding to the water-stop sheet is matched with a cooling water inlet interface, and the upper part of the other side is matched with a cooling water return interface; the cylinder body is sealed and provided with an optical fiber perform suspender abdicating hole at the center. Protecting the graphite piece in the optical fiber drawing furnace; the sealing effect between the graphite felt and the optical fiber preform is prevented from being reduced due to the fact that the graphite felt is flushed by high-temperature airflow; leakage caused by high-temperature airflow scouring is avoided; the protection effect on a group of graphite felts is improved.
Description
Technical Field
The invention belongs to the technical field of optical fiber production equipment, and particularly relates to a water-cooling air sealing device of an optical fiber drawing furnace.
Background
As is known in the art, an optical fiber is drawn by heating an optical fiber preform in an optical fiber drawing furnace to a softened state, and during drawing, since the temperature in the optical fiber drawing furnace is high (about 2200 ℃), an inert gas such as argon or a mixed gas of argon and nitrogen is introduced into the furnace in order to protect a graphite heating element in the optical fiber drawing furnace, and the outside air is controlled to enter the furnace. It is a common practice to prevent outside air from intruding into an optical fiber drawing furnace by providing a sealing device at the upper end of the furnace.
The technical information of the sealing device of the optical fiber drawing furnace can be seen in the published chinese patent document, typically "a furnace top air sealing device for optical fiber drawing" as recommended in patent application publication No. CN104445916a, the patent structure is composed of a self-tightening spring, an annular base, a graphite air sealing ring and an upper pressing ring, in the use state, the annular base plate is installed at the entrance of the furnace top of the optical fiber drawing furnace, the inner side of the graphite air sealing ring is pressed downward by the optical fiber preform rod and contacts with the optical fiber preform rod under the action of the self-tightening spring in the process of feeding the optical fiber preform rod into the optical fiber drawing furnace, and the self-tightening spring can be correspondingly retracted when the outer diameter of the optical fiber preform rod changes (see paragraphs 0013 to 0014 of the specification of the patent). The structure of this patent is undoubtedly an extremely simple one, but it has the following disadvantages: first, during the drawing process of the optical fiber preform, the graphite gas seal ring can play the expected sealing role most of the time during the starting and middle drawing processes, but at the ending, especially when the diameter difference between the final diameter (the diameter of the tail handle part) of the optical fiber preform and the optical fiber preform body is increased to reach or even exceed 20mm, the graphite gas seal ring can play the useless gas seal role; secondly, because the temperature of the optical fiber drawing furnace is higher, which is nearly 2200 ℃ as mentioned above, the temperature at the inlet of the furnace top is correspondingly higher, so that the influence on the graphite gas seal ring and the self-tightening spring is very serious, and the graphite gas seal ring and the self-tightening spring are not damaged for a long time; thirdly, since the spring is fatigued to lose its elastic effect due to its deadly weak point, it must be replaced frequently in order to maintain its effect.
More typically, the patent document CN203728719U provides "a sealing device for an optical fiber drawing furnace", which uses a relative sliding fit of an inner sleeve and an outer sleeve (the inner sleeve and the outer sleeve form a sliding pair with each other) to seal the upper part of a protective roof, and a sealing member is arranged at the bottom of the outer sleeve, and the sealing member forms a seal with an inlet of the furnace roof, but since a gap is easily generated between the outer wall of the inner sleeve and the inner wall of the outer sleeve due to frequent friction, external air enters the furnace from the gap, and therefore, the rationality of the patent structure is seriously questioned.
The sealing means of the prior art optical fiber drawing furnaces, including but not limited to the two patents listed above, are insufficient to achieve the desired effect of preventing oxygen from the outside air from entering the furnace. Furthermore, graphite sealing elements such as graphite felt, although capable of exhibiting good sealing characteristics, are undoubtedly a big cost burden for the optical fiber manufacturers, since they belong to the category of wearing parts or consumable parts and are extremely expensive, since in the usual case, for each drawing of an optical fiber preform, the cost of replacing the graphite felt of the structural system of the sealing device of the optical fiber drawing furnace is about 400 yuan (RMB). The problem of how to protect graphite felt with a reasonable structural design is also troubling and desired to be solved, but there is no technical teaching in the patent and non-patent documents published so far to protect the graphite seals used in the sealing devices of fiber drawing furnaces and thereby extend the service life without reducing the sealing effect.
In view of the above-mentioned prior art, the applicant has made a long-lasting and useful search and repeat design, which eventually led to the technical solutions described below, and has conducted simulation tests in the applicant's test center with privacy measures, and the results proved to be feasible.
Disclosure of Invention
The invention aims to provide a water-cooling air seal device of an optical fiber drawing furnace, which is beneficial to obviously reducing and improving the sealing effect at an inlet of a furnace top so as to prevent external air from invading into the furnace, and is beneficial to effectively protecting a graphite felt used as a sealing body so as to ensure that the service life of graphite is obviously prolonged on the premise of not reducing the sealing effect.
The task of the invention is completed in this way, a water-cooling air seal device of an optical fiber drawing furnace comprises a base, wherein the base is provided with a base water cooling cavity, a base water cooling cavity partition plate is arranged in the base water cooling cavity, one side of the base, which is positioned on the base and is provided with a base water inlet pipe connector, the other side of the base water cooling cavity partition plate is provided with a base water return pipe connector, and the central position of the base is provided with a base through hole; the graphite felt baffle ring is supported on the base, a graphite felt accommodating cavity is formed in the center of the graphite felt baffle ring, and an inert gas introducing hole communicated with the graphite felt accommodating cavity is formed in the side part of the graphite felt baffle ring; a group of graphite felts which are overlapped on the base from bottom to top at the position corresponding to the graphite felt containing cavity, wherein the optical fiber perform rod sealing matching hole at the center of the group of graphite felts corresponds to and is communicated with the base through hole; the gas seal cylinder body is supported on the graphite felt baffle ring, the gas seal cylinder body cavity of the gas seal cylinder body corresponds to the upper part of the group of graphite felts, a gas seal cylinder body water cooling separation cavity is formed on the gas seal cylinder body and around the periphery of the gas seal cylinder body, a water-stop plate is arranged in the gas seal cylinder body water cooling separation cavity, the lower part of one side corresponding to the water-stop plate is provided with a cooling water inlet interface communicated with the gas seal cylinder body water cooling separation cavity, and the upper part of the other side corresponding to the water-stop plate is provided with a cooling water return interface communicated with the gas seal cylinder body water cooling separation cavity; and the cylinder sealing cover is arranged corresponding to the top of the gas seal cylinder, and an optical fiber preform suspender abdicating hole is formed in the central position of the cylinder sealing cover.
In a specific embodiment of the present invention, the base water inlet pipe interface and the base water return pipe interface are coupled to a side portion of the base or an edge portion of an upward side of the base.
In another specific embodiment of the present invention, a graphite felt baffle ring supporting seat matching cavity is formed on the base and around the periphery of the base through hole, a graphite felt baffle ring supporting seat is formed on the lower portion of the graphite felt baffle ring, the graphite felt baffle ring supporting seat is supported on the cavity bottom wall of the graphite felt baffle ring supporting seat matching cavity, and the group of graphite felts is also supported on the cavity bottom wall of the graphite felt baffle ring supporting seat matching cavity.
In a further embodiment of the present invention, a barrel chassis support and a barrel chassis stack ring engaging step are formed on the upward facing side of the graphite felt baffle ring and around the circumference of the graphite felt baffle ring, the barrel chassis stack ring engaging step is located outside the barrel chassis support, and the air-tight barrel is supported on the barrel chassis support and engaged with the barrel chassis stack ring engaging step.
In a further specific embodiment of the present invention, a cylinder chassis is formed at the bottom of the air-tight cylinder, and a cylinder chassis stacking ring is formed at the edge of the cylinder chassis around the circumference of the cylinder chassis, the cylinder chassis is supported on the cylinder chassis supporting seat, and the cylinder chassis stacking ring is matched with the cylinder chassis stacking ring matching step.
In a further specific embodiment of the present invention, a cylinder chassis seal ring caulking groove is formed on the surface of the cylinder chassis support base and around the circumference of the cylinder chassis support base, a cylinder chassis seal ring is embedded in the cylinder chassis seal ring caulking groove, and the cylinder chassis seal ring is in sealing fit with the cylinder chassis.
In a more specific embodiment of the present invention, a gas seal cylinder handle is fixed to the upper portion of the outer wall of the gas seal cylinder and at positions facing each other.
In a further specific embodiment of the present invention, an airtight barrel top surface sealing ring groove is formed in the peripheral edge portion of the downward side of the barrel sealing cover, an airtight barrel top surface sealing ring is embedded in the airtight barrel top surface sealing ring groove, and the airtight barrel top surface sealing ring is in sealing fit with the top surface of the airtight barrel.
In yet a further specific embodiment of the present invention, the number of the graphite felt group is six.
In yet another specific embodiment of the present invention, each graphite felt of the set of graphite felts has a thickness of 4-6mm.
One of the technical effects of the technical scheme provided by the invention is that as the base is adopted, the graphite felt baffle ring is arranged on the base, and the group of graphite felts accommodated in the graphite felt accommodating cavity of the graphite felt baffle ring is supported on the base, the group of graphite felts can be used for implementing ideal sealing on the optical fiber perform passing through the optical fiber perform sealing matching hole, so that external air is prevented from entering the optical fiber drawing furnace from the inlet of the furnace top, and the protection of a graphite piece in the optical fiber drawing furnace is very facilitated; because the base water cooling cavity is formed on the base, the temperature of the group of graphite felts can be effectively reduced, the sealing effect between the group of graphite felts and the optical fiber preform rod can be prevented from being reduced due to the scouring of the group of graphite felts by high-temperature airflow, the service life of the group of graphite felts can be obviously prolonged, and the cost of consumable parts is reduced; the gas seal cylinder can further play a role in sealing and protecting the entrance of the furnace top of the optical fiber drawing furnace and a role in protecting a group of graphite felts, so that the graphite body and the group of graphite felts in the optical fiber drawing furnace can be further protected; because the water cooling isolating cavity of the gas seal cylinder body is formed on the gas seal cylinder body, a group of graphite felts can be further protected, and leakage caused by high-temperature airflow scouring is avoided; because the graphite felt baffle ring is provided with the inert gas introducing hole, the protection effect on a group of graphite felts can be greatly improved.
Drawings
FIG. 1 is a block diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a first state in the application process of the present invention.
Fig. 3 is a schematic diagram of a second state in the application process of the present invention.
Detailed Description
In order to clearly understand the technical spirit and the advantages of the present invention, the applicant below describes in detail by way of example, but the description of the example is not intended to limit the technical scope of the present invention, and any equivalent changes made according to the present inventive concept, which are merely in form and not in material, should be considered as the technical scope of the present invention.
Example 1:
referring to fig. 1, a disc-shaped base 1 is shown, the base 1 is formed with a base water cooling cavity 11, a base water cooling cavity partition 111 is arranged in the base water cooling cavity 11, a base water inlet pipe connector 12 communicated with the base water cooling cavity 11 is connected to one side of the base water cooling cavity partition 111 on the base 1, a base water return pipe connector 13 also communicated with the base water cooling cavity 11 is connected to the other side of the base water cooling cavity partition 111, and a base through hole 14 is formed in the center of the base 1; a graphite felt baffle ring 2 is shown, the graphite felt baffle ring 2 is supported on the base 1, a graphite felt accommodating cavity 21 is arranged at the central position of the graphite felt baffle ring 2, and an inert gas introducing hole 22 communicated with the graphite felt accommodating cavity 21 is also arranged at the side part of the graphite felt baffle ring 2; a group of graphite felts 3 stacked on the pedestal 1 from bottom to top at a position corresponding to the graphite felt housing chamber 21 is shown, and an optical fiber preform sealing fitting hole 31 at the center of the group of graphite felts 3 corresponds to and communicates with the pedestal through hole 14; an air-sealing cylinder 4 is shown, the air-sealing cylinder 4 is supported on the graphite felt baffle ring 2, an air-sealing cylinder cavity 41 of the air-sealing cylinder 4 corresponds to the upper part of the group of graphite felts 3, an air-sealing cylinder water cooling separation cavity 42 is formed on the air-sealing cylinder 4 and around the air-sealing cylinder 4, a water baffle plate 421 is arranged in the air-sealing cylinder water cooling separation cavity 42, a cooling water inlet interface 43 communicated with the air-sealing cylinder water cooling separation cavity 42 is matched and connected with the lower part of one side corresponding to the water baffle plate 421, and a cooling water return interface 44 also communicated with the air-sealing cylinder water cooling separation cavity 42 is matched and connected with the upper part of the other side corresponding to the water baffle plate 421; a cylinder sealing cover 5 is shown, the cylinder sealing cover 5 is disposed corresponding to the top of the above-mentioned hermetic cylinder 4, and an optical fiber preform boom escape hole 51 is opened at the center of the cylinder sealing cover 5.
In a use state, the base water inlet pipe connector 12 and the base water return pipe connector 13 are connected to a water circulation cooling device such as a circulation pump through a pipeline, and the cooling water inlet connector 43 and the cooling water return connector 44 are the same as the above. In a use state, an inert gas introducing joint is arranged at a position corresponding to the inert gas introducing hole 22, inert gas such as argon is introduced from the inert gas introducing joint through a pipeline, and the introduced argon is dispersed in a group of graphite felts 3 in a dispersion mode from each upper and lower adjacent graphite felt gaps in the group of graphite felts 3, so that a good protection effect on the group of graphite felts 3 is achieved. In addition, under the water cooling, the temperature of the base 1 and the air seal cylinder 4 can be kept below 20 degrees, and the excellent protection effect on the group of graphite felts 3 is also achieved.
In the present embodiment, the base water inlet pipe joint 12 and the base water return pipe joint 13 are coupled to the edge portion of the base 1 facing upward.
Continuing to refer to fig. 1, a graphite felt-ring support fitting cavity 15 is formed on the base 1 and around the base through hole 14, a graphite felt-ring support 23 is formed at the lower part of the graphite felt-ring 2, the graphite felt-ring support 23 is supported on the bottom wall of the graphite felt-ring support fitting cavity 15, and the group of graphite felts 3 is also supported on the bottom wall of the graphite felt-ring support fitting cavity 15.
A cylinder chassis supporting seat 24 and a cylinder chassis stack ring matching step 25 are formed on one upward side of the graphite felt baffle ring 2 and around the circumferential direction of the graphite felt baffle ring 2, the cylinder chassis stack ring matching step 25 is positioned on the outer side of the cylinder chassis supporting seat 24, and the air-seal cylinder 4 is supported on the cylinder chassis supporting seat 24 and is matched with the cylinder chassis stack ring matching step 25.
A cylinder chassis 45 is formed at the bottom of the airtight cylinder 4, and a cylinder chassis stack ring 451 is formed at the edge of the cylinder chassis 45 around the circumferential direction of the cylinder chassis 45, the cylinder chassis 45 is supported on the cylinder chassis supporting seat 24, and the cylinder chassis stack ring 451 is engaged with the cylinder chassis stack ring engaging step 25. As can be seen from the illustration of fig. 1, the cartridge chassis stacking ring 451 is perpendicular to the downward facing side of the cartridge chassis 45.
Preferably, a drum chassis sealing ring embedding groove 241 is formed on the surface of the drum chassis supporting seat 24 and around the circumferential direction of the drum chassis supporting seat 24, a drum chassis sealing ring 2411 is embedded in the drum chassis sealing ring embedding groove 241, and the drum chassis sealing ring 2411 is in sealing fit with the drum chassis 45.
Preferably, an airtight cylinder handle 46 is fixed to each of upper portions of the outer walls of the airtight cylinders 4 and at positions facing each other.
As shown in fig. 1, an airtight cylindrical top surface seal ring groove 52 is formed in the peripheral edge portion of the downward side of the cylindrical seal cover 5, an airtight cylindrical top surface seal ring 521 is embedded in the airtight cylindrical top surface seal ring groove 52, and the airtight cylindrical top surface seal ring 521 is in sealing engagement with the top surface of the airtight cylindrical body 4.
Preferably, the number of the graphite felt 3 in the group is six but not limited to six, and the thickness of each graphite felt in the group of graphite felt 3 is preferably 4-6mm, more preferably 6mm, and most preferably 5mm, and 5mm is selected in this embodiment.
Example 2:
in the drawing, only the base water inlet pipe joint 12 and the base water return pipe joint 13 are coupled to the side of the base 1, and the rest is the same as the description of embodiment 1.
Application example:
referring to fig. 2 and 3 in conjunction with fig. 1, in which the applicant describes the application of the present invention, in fig. 2 and 3 there is shown an optical fiber drawing furnace 6, provided with a drawing furnace holder 61 at the top entrance of the optical fiber drawing furnace 6, the drawing furnace holder cavity 611 of the drawing furnace holder 61 communicating with the upper furnace mouth 62 of the optical fiber drawing furnace 6, and connected to each of the sides of the drawing furnace holder 61 and at the position of the inert gas introduction joint corresponding to the aforementioned inert gas introduction hole 22, a pipe 7, i.e., an inert gas introduction pipe, more specifically, an argon introduction pipe.
When the optical fiber preform 8 is to be slowly introduced into the optical fiber drawing furnace 6 through the hermetically sealed cylindrical cavity 41 of the hermetically sealed cylindrical body 4, the cylindrical body sealing lid 5 is temporarily removed from the hermetically sealed cylindrical body 4 so that the illustrated hanger rod 9 passes through the optical fiber preform hanger rod relief hole 51, and the clamp 91 at the lower end of the hanger rod 9 clamps the ball 81 at the end of the optical fiber preform 8. The suspension rod 9 is slowly descended with the aid of a vertical feed driving device similar to that disclosed in CN203728719U, and the optical fiber preform 8 is driven to descend. When the optical fiber perform 8 enters the optical fiber drawing furnace 6, the optical fiber drawing furnace 6 heats the optical fiber perform and enters a drawing state. At this time, the chassis water cooling chamber 11 and the gas-sealed-cylinder water cooling compartment 42 are in a circulating cooling state by circulating cooling water, and the piping 7 is simultaneously in a state of supplying an inert gas, i.e., argon gas. Meanwhile, the periphery of the optical fiber perform 8 is sealed by the group of graphite felts 3, and the optical fiber perform 8 gradually descends along with the progress of wire drawing work, which is specifically illustrated by fig. 2.
As shown in fig. 3, when the preform diameter-variable portion 82 of the optical fiber preform 8 goes downward out of the optical fiber preform sealing fitting hole 31, the argon gas introduced from the pipe 7 enters the hermetic sealing cylinder chamber 41 through the optical fiber preform sealing fitting hole 31, and at the same time, the cylinder sealing cap 5 is just in the sealing fitting state with the top of the hermetic sealing cylinder 4, so that the external air does not intrude into the hermetic sealing cylinder chamber 41, which is very advantageous for protecting the group of graphite felts 3 and also very advantageous for protecting the graphite member in the optical fiber drawing furnace 6.
In conclusion, the technical scheme provided by the invention overcomes the defects in the prior art, successfully completes the invention task and truly realizes the technical effects of the applicant in the technical effect column.
Claims (10)
1. A water-cooling air sealing device of an optical fiber drawing furnace is characterized by comprising a base (1), wherein a base water cooling cavity (11) is formed on the base (1), a base water cooling cavity partition plate (111) is arranged in the base water cooling cavity (11), a base water inlet pipe connector (12) is matched and connected with one side of the base water cooling cavity partition plate (111) on the base (1), a base water return pipe connector (13) is matched and connected with the other side of the base water cooling cavity partition plate (111), and a base through hole (14) is formed in the center of the base (1); the graphite felt baffle ring (2) is supported on the base (1), a graphite felt accommodating cavity (21) is formed in the center of the graphite felt baffle ring (2), and an inert gas introducing hole (22) communicated with the graphite felt accommodating cavity (21) is formed in the side part of the graphite felt baffle ring (2); a group of graphite felts (3) which are overlapped on the base (1) from bottom to top at the position corresponding to the graphite felt containing cavity (21), wherein the optical fiber preform sealing matching hole (31) at the center of the group of graphite felts (3) corresponds to and is communicated with the base through hole (14); the gas seal cylinder body (4) is supported on the graphite felt baffle ring (2), a gas seal cylinder body cavity (41) of the gas seal cylinder body (4) corresponds to the upper part of the group of graphite felts (3), a gas seal cylinder body water cooling separation cavity (42) is formed on the gas seal cylinder body (4) and surrounds the gas seal cylinder body (4), a water stop plate (421) is arranged in the gas seal cylinder body separation cavity (42), a cooling water inlet interface (43) communicated with the gas seal cylinder body water cooling separation cavity (42) is matched and connected with the lower part of one side corresponding to the water stop plate (421), and a cooling water return interface (44) also communicated with the gas seal cylinder body water cooling separation cavity (42) is matched and connected with the upper part of the other side corresponding to the water stop plate (421); the cylinder sealing cover (5), the cylinder sealing cover (5) is arranged corresponding to the top of the air-sealed cylinder (4), and the center of the cylinder sealing cover (5) is provided with an optical fiber perform suspender abdicating hole (51); an air seal cylinder top surface sealing ring groove (52) is formed in the peripheral edge of the downward side of the cylinder sealing cover (5), an air seal cylinder top surface sealing ring (521) is embedded in the air seal cylinder top surface sealing ring groove (52), and the air seal cylinder top surface sealing ring (521) is in sealing fit with the top surface of the air seal cylinder (4); the side part of the graphite felt baffle ring (2) is also provided with an inert gas introducing hole (22) communicated with the graphite felt accommodating cavity (21); and inert gas introduction joints are arranged at positions corresponding to the inert gas introduction holes (22), and the inert gas is introduced through pipelines by the inert gas introduction joints so that the inert gas is dispersed in a group of graphite felts (3) from the gaps of the upper and lower adjacent graphite felts in the group of graphite felts (3) in a dispersion mode to play a role in protecting the group of graphite felts (3).
2. The water-cooled gas sealing device of the optical fiber drawing furnace according to claim 1, wherein the base water inlet pipe connector (12) and the base water return pipe connector (13) are connected to the side of the base (1) or the edge of the upward side of the base (1).
3. The water-cooling gas seal device of the optical fiber drawing furnace according to claim 1, wherein a graphite felt ring supporting seat matching cavity (15) is formed on the base (1) and around the base through hole (14), a graphite felt ring supporting seat (23) is formed at the lower part of the graphite felt ring (2), the graphite felt ring supporting seat (23) is supported on the cavity bottom wall of the graphite felt ring supporting seat matching cavity (15), and the group of graphite felts (3) is also supported on the cavity bottom wall of the graphite felt ring supporting seat matching cavity (15).
4. The water-cooling air seal device of the optical fiber drawing furnace according to claim 1, wherein a barrel chassis supporting seat (24) and a barrel chassis stacking ring matching step (25) are formed on the upward side of the graphite felt baffle ring (2) and around the circumferential direction of the graphite felt baffle ring (2), the barrel chassis stacking ring matching step (25) is located on the outer side of the barrel chassis supporting seat (24), and the air seal barrel (4) is supported on the barrel chassis supporting seat (24) and is simultaneously matched with the barrel chassis stacking ring matching step (25).
5. The water-cooling air seal device of the optical fiber drawing furnace as claimed in claim 4, wherein a barrel chassis (45) is formed at the bottom of the air seal barrel (4), and a barrel chassis stacking ring (451) is formed at the edge portion of the barrel chassis (45) around the circumferential direction of the barrel chassis (45), the barrel chassis (45) is supported on the barrel chassis supporting seat (24), and the barrel chassis stacking ring (451) is matched with the barrel chassis stacking ring matching step (25).
6. The water-cooling air seal device of the optical fiber drawing furnace according to claim 5, wherein a cylinder chassis sealing ring caulking groove (241) is formed on the surface of the cylinder chassis supporting seat (24) and around the circumference direction of the cylinder chassis supporting seat (24), a cylinder chassis sealing ring (2411) is embedded in the cylinder chassis sealing ring caulking groove (241), and the cylinder chassis sealing ring (2411) is in sealing fit with the cylinder chassis (45).
7. The water-cooled gas seal device for an optical fiber drawing furnace according to claim 1, wherein a gas seal cylinder handle (46) is fixed to each of upper portions of outer walls of the gas seal cylinder (4) at positions facing each other.
8. The water-cooling air seal device of the optical fiber drawing furnace according to claim 1, wherein a top surface sealing ring groove (52) of the air seal cylinder is formed at the peripheral edge of the downward side of the cylinder sealing cover (5), an top surface sealing ring (521) of the air seal cylinder is embedded in the top surface sealing ring groove (52) of the air seal cylinder, and the top surface sealing ring (521) of the air seal cylinder is in sealing fit with the top surface of the air seal cylinder (4).
9. The water-cooling air seal device of the optical fiber drawing furnace according to claim 1, wherein the number of the graphite felts (3) is six.
10. The water-cooled gas sealing device of the optical fiber drawing furnace according to claim 1 or 9, wherein the thickness of each graphite felt in the group of graphite felts (3) is 4-6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611167438.4A CN106746592B (en) | 2016-12-16 | 2016-12-16 | Water-cooling air sealing device of optical fiber drawing furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611167438.4A CN106746592B (en) | 2016-12-16 | 2016-12-16 | Water-cooling air sealing device of optical fiber drawing furnace |
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| CN106746592A CN106746592A (en) | 2017-05-31 |
| CN106746592B true CN106746592B (en) | 2023-03-28 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109384382B (en) * | 2018-11-27 | 2023-11-03 | 通鼎互联信息股份有限公司 | Sealing device of optical fiber drawing furnace |
| CN111348826B (en) * | 2020-04-29 | 2024-05-07 | 上海煜志科技有限公司 | Optical fiber drawing furnace |
| CN111620559A (en) * | 2020-05-25 | 2020-09-04 | 华能(泰安)光电科技有限公司 | Optical fiber perform high temperature rod changing device |
| CN114014534B (en) * | 2021-12-21 | 2023-08-22 | 江苏亨通光纤科技有限公司 | Optical fiber drawing furnace gas sealing method and device adopting three-dimensional graphite felt sealing structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH522287A (en) * | 1970-04-13 | 1972-06-15 | Inst Angewandte Physik | Low pressure gas discharge tube for lasers |
| US4407666A (en) * | 1981-08-31 | 1983-10-04 | Gte Laboratories Incorporated | Methods for prolonging the useful life of a graphite element in an optical fiber-drawing furnace |
| FR2747673B1 (en) * | 1996-04-23 | 1998-05-22 | Alcatel Fibres Optiques | FIBRATION DEVICE OF AN OPTICAL FIBER PREFORM |
| ATE301621T1 (en) * | 1999-05-10 | 2005-08-15 | Pirelli & C Spa | METHOD AND INDUCTION FURNACE FOR DRAWING LARGE DIAMETER PREFORMS INTO OPTICAL FIBERS |
| FI122225B (en) * | 2009-08-04 | 2011-10-14 | Outotec Oyj | SEALING DEVICE |
| CN201890845U (en) * | 2010-07-30 | 2011-07-06 | 江苏亨通光纤科技有限公司 | Air seal device of fiber drawing furnace for drawing large-diameter optical fiber preform |
| CN102569815B (en) * | 2012-01-20 | 2014-09-03 | 石家庄学院 | Electrode material for all-vanadium redox flow battery and preparation method thereof |
| GB2503475A (en) * | 2012-06-27 | 2014-01-01 | Acal Energy Ltd | Fuel Cells for use at elevated temperatures and pressures |
| CN105157424B (en) * | 2015-09-16 | 2017-04-05 | 苏州汇科机电设备有限公司 | The high-temperature vacuum sintering furnace heated using graphite heating rod |
| CN206289171U (en) * | 2016-12-16 | 2017-06-30 | 青海中利光纤技术有限公司 | The water-cooling air-sealing device of fibre drawing furnace |
| CN212335019U (en) * | 2020-05-25 | 2021-01-12 | 华能(泰安)光电科技有限公司 | Optical fiber perform high temperature rod changing device |
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2016
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