CN212864574U - Optical fiber drawing device - Google Patents
Optical fiber drawing device Download PDFInfo
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- CN212864574U CN212864574U CN202021471601.8U CN202021471601U CN212864574U CN 212864574 U CN212864574 U CN 212864574U CN 202021471601 U CN202021471601 U CN 202021471601U CN 212864574 U CN212864574 U CN 212864574U
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Abstract
The utility model relates to a preparation technical field of optic fibre discloses an optic fibre wire drawing device, including the furnace body, be provided with the heating member in the furnace body for melting prefabricated excellent heat, still include: the first heat-preserving pipe is arranged below the furnace body and communicated with the interior of the furnace body; the second heat preservation pipe is arranged below the first heat preservation pipe and is arranged at an interval with the first heat preservation pipe, and the optical fiber formed by drawing the prefabricated rod passes through the first heat preservation pipe and the second heat preservation pipe; and the guide pipe is arranged on the periphery of the second heat preservation pipe and is connected to the lower end of the first heat preservation pipe in a sealing mode, a negative pressure channel communicated with the first heat preservation pipe is formed between the guide pipe and the second heat preservation pipe, and the negative pressure channel is configured to discharge particles in the furnace body. This optical fiber wire drawing device passes through the negative pressure passageway and discharges the granule in the furnace body, realizes the volatile substance that produces in the online clearance furnace body, guarantees the cleanness of the internal environment of furnace, improves optical fiber strength.
Description
Technical Field
The utility model relates to a preparation technical field of optic fibre especially relates to an optic fibre wire drawing device.
Background
The existing optical fiber is made of quartz glass, the optical fiber is a brittle material, in the high-temperature drawing process, a graphite piece used for heating in a furnace body and a prefabricated rod can generate chemical reaction at high temperature to generate particles with higher hardness, mainly SiC particles, and if a bare optical fiber is contacted with the SiC particles in a drawing furnace, defects can be generated on the surface of the optical fiber. And when the temperature in the drawing furnace is higher and the drawing time is longer, the number of SiC particles generated by the reaction is larger, so that the probability of damaging the surface of the bare optical fiber is higher, the number of defects generated on the surface of the optical fiber is larger, and the strength of the optical fiber is lower.
At present, the method for improving the strength of the optical fiber by reducing the surface defects and microcracks of the optical fiber is commonly used, namely, the graphite piece in a furnace is cleaned after the drawing is finished, so that the probability of attaching SiC particles to the surface of the optical fiber is reduced, but the production efficiency is reduced by the process, the risk of polluting the graphite piece exists, and the service life of the graphite piece is shortened.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an optical fiber drawing device, when having solved current optical fiber drawing device clearance graphite spare, need frequently dismantle graphite spare, reduced production efficiency, have the problem of the contaminated risk of graphite spare moreover.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides an optical fiber wire drawing device, the induction cooker comprises a cooker bod, be provided with the heating member in the furnace body for melting prefabricated excellent heat supply, still include:
the first heat-preserving pipe is arranged below the furnace body and communicated with the interior of the furnace body;
the second heat preservation pipe is arranged below the first heat preservation pipe and is arranged at an interval with the first heat preservation pipe, and the optical fiber formed by drawing the prefabricated rod penetrates through the first heat preservation pipe and the second heat preservation pipe; and
and the guide pipe is arranged on the periphery of the second heat preservation pipe and is connected to the lower end of the first heat preservation pipe in a sealing mode, a negative pressure channel communicated with the first heat preservation pipe is formed between the guide pipe and the second heat preservation pipe, and the negative pressure channel is configured to discharge particles in the furnace body.
The optical fiber drawing device can provide heat for melting the prefabricated rod through a heating element in the furnace body so as to draw the prefabricated rod, the first heat preservation pipe is arranged below the furnace body and communicated with the inside of the furnace body, the second high-temperature pipe is arranged below the first heat preservation pipe and is arranged at an interval with the first heat preservation pipe, the guide pipe is arranged at the periphery of the second heat preservation pipe and is connected to the lower end of the first heat preservation pipe in a sealing manner, a negative pressure channel communicated with the first heat preservation pipe is formed between the guide pipe and the second heat preservation pipe, particles in the furnace body are discharged through the negative pressure channel, volatile matters generated in the furnace body are cleaned on line, and the cleanness of the environment in the furnace body is ensured; the times of cooling and cleaning the furnace body are reduced, and the production change efficiency is improved; the pollution caused by the disassembly and assembly of the graphite piece is reduced; reduce the surface defects of the optical fiber and improve the strength of the optical fiber.
As a preferable mode of the optical fiber drawing apparatus, the inner diameter of the first insulating tube is gradually reduced from both ends to the middle.
The structure has a large flow rate of gas at a position where the inner diameter of the first insulation pipe is small according to the venturi effect, thereby allowing the gas to flow toward the lower portion of the first insulation pipe.
As a preferable mode of the optical fiber drawing apparatus, the optical fiber drawing apparatus further includes: a gas extraction device configured to provide motive force for exhausting gas within the furnace.
As a preferable mode of the optical fiber drawing apparatus, the air suction device includes:
the side wall of the guide pipe is provided with an air outlet, and the air outlet is communicated with the air extraction pipeline; and
and the air pump is arranged on the air pumping pipeline.
The air extracting device is communicated with the air outlet through an air extracting pipeline, so that air can be exhausted; the air pump is used for providing external force for exhausting the air, so that the air is easier to exhaust.
As a preferable embodiment of the above optical fiber drawing apparatus, the air extracting device further includes a filter, and the filter is disposed on the air extracting line between the air outlet and the air extracting pump.
The filter can filter the gas that discharges to filter volatile substance granule, prevent to discharge to the air and cause secondary pollution.
As a preferable mode of the optical fiber drawing apparatus, the air extracting device further includes a pressure difference meter configured to detect a pressure difference between the front end and the rear end of the filter of the air extracting pipe.
The setting of differential pressure table can show the pressure difference around the filter, monitors the state of filter, can in time clear up when the pressure differential is great.
As a preferable mode of the optical fiber drawing apparatus, a flow controller is provided on the air exhaust line.
The setting of flow controller can control aspiration pump discharge flow size, prevents to cause the internal pressure reduction of furnace to arouse because of gas discharge flow is great and reduces the wire drawing quality.
As a preferable mode of the optical fiber drawing apparatus, the optical fiber drawing apparatus further includes an air inlet device, and the air inlet device is communicated with the inside of the furnace body through an air inlet at the upper end of the furnace body.
The air inlet device is used for introducing protective gas into the furnace body through the air inlet, so that a sealing effect is achieved, and the phenomenon that external air enters to cause oxidation of the graphite piece is avoided.
As a preferable mode of the optical fiber drawing apparatus, the side wall of the guide tube is provided with a plurality of the air outlets along a circumferential direction.
The lateral wall of guiding tube is provided with a plurality of gas outlets along circumference, and then can accelerate gaseous discharge.
As a preferable mode of the optical fiber drawing apparatus, the plurality of air outlets are arranged at equal intervals in the circumferential direction of the guide tube.
A plurality of gas outlets are arranged at equal intervals along the circumferential direction of the guide pipe, so that gas can be uniformly discharged along the circumferential direction of the guide pipe, gas flowing in the furnace body is ensured to be uniform, and the quality of optical fiber drawing is improved.
The utility model has the advantages that:
the utility model provides an optical fiber drawing device can provide heat for melting the prefabricated stick through the heating member in the furnace body to in with prefabricated stick wire drawing, first insulating tube sets up in the below of furnace body, and be linked together with the inside of furnace body, the second high temperature tube is in the below of first insulating tube, and set up with first insulating tube interval, the guiding tube sets up in the periphery of second insulating tube, and sealing connection is at the lower extreme of first insulating tube, form the negative pressure passageway that communicates first insulating tube between guiding tube and the second insulating tube, discharge the particle in the furnace body through the negative pressure passageway, realize the volatile matter that produces in the online clearance furnace body, guarantee the cleanness of the interior environment of furnace body; the times of cooling and cleaning the furnace body are reduced, and the production change efficiency is improved; the pollution caused by the disassembly and assembly of the graphite piece is reduced; reduce the surface defects of the optical fiber and improve the strength of the optical fiber.
Drawings
Fig. 1 is a schematic structural view of an optical fiber drawing apparatus provided by the present invention.
In the figure:
1. a furnace body; 2. a heating member; 3. a first heat-insulating tube; 4. a second insulating tube; 5. a guide tube;
51. an air outlet; 61. an air extraction pipeline; 62. an air pump; 63. a filter; 64. a differential pressure gauge; 65. a flow controller;
100. performing a rod; 200. microparticles; 300. an optical fiber.
Detailed Description
In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The present embodiment provides an optical fiber drawing apparatus, as shown in fig. 1, the optical fiber drawing apparatus includes a furnace body 1, a heating member 2 is provided in the furnace body 1, the heating member 2 can convert electric energy into heat energy for supplying heat for melting a preform 100, the heating member 2 is provided in the furnace body 1, and the inside of the heating member 2 is a hollow space. In the embodiment, the heating element 2 is a graphite element, so that the heating element has good electrical conductivity and high temperature resistance, and has small weight loss and small thermal expansion coefficient after being burnt by an ultrahigh-temperature electric arc. The surface quality of the preform 100 used for drawing is good, and a raw material is provided for drawing the optical fiber 300.
The bottom of the furnace body 1 is provided with an opening which is communicated with the hollow space of the heating member 2, and the optical fiber 300 formed by drawing the preform 100 passes through the hollow space inside the heating member 2 and extends out of the furnace body 1 through the opening. The upper end of furnace body 1 is provided with the air inlet (not shown in the figure), and optical fiber wire drawing device still includes air inlet unit, and air inlet unit is linked together through air inlet and furnace body 1 is inside, and air inlet unit lets in protective gas through the air inlet to furnace body 1 is inside to play sealed effect, prevent that the external air from getting into the oxidation that arouses graphite spare. Wherein, the protective gas is inert gas, in the process of drawing the prefabricated stick 100, the furnace body 1 is filled with the inert gas, the prefabricated stick 100 is melted at high temperature, and the proper temperature and gas atmosphere are provided for the optical fiber 300 formed by drawing.
In the process of drawing the prefabricated rod 100, the prefabricated rod 100 and a graphite piece generate chemical reaction at high temperature to generate volatile matter particles 200, mainly SiC particles, the particles 200 usually fly along with the gas in the furnace body 1 in a free state and are finally attached to and deposited on the surface of the graphite piece, the contact probability of the particles 200 and the optical fiber 300 is higher in the process, and the strength of the optical fiber 300 is easily reduced. In order to solve the problem, the optical fiber drawing device also comprises a first heat preservation pipe 3, a second heat preservation pipe 4 and a guide pipe 5, the first heat preservation pipe 3 is arranged below the furnace body 1, and is communicated with the interior of the furnace body 1 through an opening, the second heat preservation pipe 4 is arranged below the first heat preservation pipe 3 and is arranged at an interval with the first heat preservation pipe 3, in the embodiment, the first heat preservation pipe 3 and the second heat preservation pipe 4 are coaxially arranged, the optical fiber 300 formed by drawing the prefabricated rod 100 passes through the first heat preservation pipe 3 and the second heat preservation pipe 4, the guide pipe 5 is arranged at the periphery of the second heat preservation pipe 4, the guide pipe 5 and the second heat preservation pipe 4 form a negative pressure channel communicated with the first heat preservation pipe 3, the negative pressure channel is used for discharging particles 200 in the furnace body 1, volatile matters generated in the furnace body 1 are cleaned on line, and the cleanness of the environment in the furnace body 1 is ensured; the times of cooling and cleaning the furnace body 1 are reduced, and the production change efficiency is improved; the pollution caused by the disassembly and assembly of the graphite piece is reduced; the surface defects of the optical fiber 300 are reduced, and the strength of the optical fiber 300 is improved. Wherein, first insulating tube 3 and second insulating tube 4 are the graphite pipe, and it is effectual to keep warm, high temperature resistant.
As shown in fig. 1, the inner diameter of the first insulating pipe 3 is gradually reduced from both ends to the middle, and the structure has a large flow rate of gas at a position where the inner diameter of the first insulating pipe 3 is small according to the venturi effect, thereby allowing the gas to flow toward the lower portion of the first insulating pipe 3. In this embodiment, the inner surface of the first high temperature pipe 3 is a curved surface structure, so that the gas can be smoothly discharged.
As shown in fig. 1, the optical fiber drawing apparatus further includes an air extractor for providing power for the particles 200 discharged from the furnace body 1, the air extractor includes an air extraction pipeline 61 and an air extraction pump 62, the air extraction pipeline 61 of the air extraction pipeline 61 is communicated with the negative pressure channel, and the air extraction pump 62 is disposed on the air extraction pipeline 61. Specifically, the side wall of the guide tube 5 is provided with an air outlet 51, and the air extractor is communicated with the air outlet 51 through an air extraction pipeline 61, so that the particles 200 can be discharged along with the air; the provision of the air pump 62 provides an external force for the discharge of the gas, making the gas easier to discharge.
The air extracting device further comprises a filter 63, the filter 63 is arranged on the air extracting pipeline 61 between the air outlet 51 and the air extracting pump 62, and the filter 63 is arranged to filter the exhausted air so as to filter out particles 200 in the air and prevent the exhausted air from causing secondary pollution.
The air extraction device further comprises a pressure difference meter 64, wherein the pressure difference meter 64 is used for detecting the pressure difference of the front end and the rear end of the air extraction pipeline 61, which is located at the front end and the rear end of the filter 63, so that the state of the filter 63 can be monitored through the pressure meter 64, and the air extraction device can be cleaned in time when the pressure difference is large.
Optionally, the air suction pipeline 61 is provided with a flow controller 65, and the flow controller 65 can control the discharge flow of the air suction pump 62, so as to prevent the reduction of the drawing quality caused by the reduction of the pressure in the furnace body 1 due to the large gas discharge flow.
In this embodiment, a filter 63, a flow rate controller 65, and a suction pump 62 are provided in this order on the suction line 61 in the discharge direction of the gas.
Alternatively, the side wall of the guide pipe 5 is provided with a plurality of gas outlets 51 in the circumferential direction, thereby enabling the discharge of gas to be accelerated. Preferably, the plurality of gas outlets 51 are arranged at equal intervals along the circumferential direction of the guide tube 5, so that the gas can be uniformly discharged along the circumferential direction of the guide tube 5, thereby ensuring that the gas in the furnace body 1 flows uniformly and improving the quality of the drawn optical fiber 300.
After the connection of the gas pipeline is finished, before the furnace body 1 is opened, inert gas is introduced into the furnace body 1 through the gas inlet device, the inert gas is discharged from the upper part of the furnace body 1 through the first heat preservation pipe 3 and the second heat preservation pipe 4 in sequence, the heating element 2 is opened for heating, the preform 100 is drawn, the suction pump 62 is started during the drawing process, the flow controller 65 is utilized to adjust the suction force, the pressure difference between the two ends of the initial filter 63 is fixed, the suction force generated by the suction pump 62 applies an external force to the gas with the particles 200, according to the Venturi effect, the particles 200 will move faster along the curved surface of the first insulating pipe 3, the probability of the particles 200 contacting with the optical fiber 300 is reduced, the gas enters the negative pressure channel through the gap between the first insulating pipe 3 and the second insulating pipe 4, and is discharged from the air outlet 51 into the suction passage 61, and the harmless gas filtered by the filter 63 is discharged into the air.
In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are used in a descriptive sense or positional relationship based on the orientation or positional relationship shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. The utility model provides an optical fiber wire drawing device, includes furnace body (1), be provided with in furnace body (1) with heating member (2) for melting prefabricated stick (100) and provide heat, its characterized in that still includes:
the first heat-preservation pipe (3) is arranged below the furnace body (1) and communicated with the interior of the furnace body (1);
the second heat-preservation pipe (4) is arranged below the first heat-preservation pipe (3) and is arranged at an interval with the first heat-preservation pipe (3), and the optical fiber (300) formed by drawing the prefabricated rod (100) penetrates out of the first heat-preservation pipe (3) and the second heat-preservation pipe (4); and
the guide pipe (5) is arranged on the periphery of the second heat preservation pipe (4) and is connected to the lower end of the first heat preservation pipe (3) in a sealing mode, a negative pressure channel communicated with the first heat preservation pipe (3) is formed between the guide pipe (5) and the second heat preservation pipe (4), and the negative pressure channel is configured to discharge particles (200) in the furnace body (1).
2. The optical fiber drawing apparatus according to claim 1, wherein the inner diameter of the first heat-insulating tube (3) is gradually reduced from both ends to the middle.
3. The optical fiber drawing apparatus according to claim 1, further comprising: an air extraction device configured to provide power for the evacuation of particles (200) within the furnace body (1).
4. The optical fiber drawing apparatus according to claim 3, wherein the gas-extracting device comprises:
the side wall of the guide pipe (5) is provided with an air outlet (51), and the air extraction pipeline (61) is communicated with the air outlet (51); and
and the air suction pump (62) is arranged on the air suction pipeline (61).
5. The optical fiber drawing apparatus according to claim 4, wherein the air-extracting device further comprises a filter (63), the filter (63) being provided on the air-extracting line (61) between the air outlet (51) and the air-extracting pump (62).
6. The optical fiber drawing apparatus according to claim 5, wherein the air-extracting device further comprises a pressure difference meter (64) configured to detect a pressure difference of the air-extracting line (61) at front and rear ends of the filter (63).
7. The optical fiber drawing apparatus according to claim 4, wherein a flow controller (65) is provided on the suction line (61).
8. An optical fiber drawing apparatus according to any one of claims 1 to 7, further comprising an air inlet means communicating with the inside of the furnace body (1) through an air inlet at the upper end of the furnace body (1).
9. The optical fiber drawing apparatus according to any one of claims 4 to 7, wherein the side wall of the guide tube (5) is provided with a plurality of the air outlets (51) in the circumferential direction.
10. The optical fiber drawing apparatus according to claim 9, wherein a plurality of the air outlets (51) are arranged at equal intervals in a circumferential direction of the guide tube (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021471601.8U CN212864574U (en) | 2020-07-23 | 2020-07-23 | Optical fiber drawing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021471601.8U CN212864574U (en) | 2020-07-23 | 2020-07-23 | Optical fiber drawing device |
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| CN212864574U true CN212864574U (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021471601.8U Active CN212864574U (en) | 2020-07-23 | 2020-07-23 | Optical fiber drawing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277728A (en) * | 2021-07-01 | 2021-08-20 | 中国计量大学 | Optical fiber drawing furnace suitable for fluoride glass |
-
2020
- 2020-07-23 CN CN202021471601.8U patent/CN212864574U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277728A (en) * | 2021-07-01 | 2021-08-20 | 中国计量大学 | Optical fiber drawing furnace suitable for fluoride glass |
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