CN114890688A

CN114890688A - Optical fiber curing oven

Info

Publication number: CN114890688A
Application number: CN202210544001.7A
Authority: CN
Inventors: 刘合一
Original assignee: Takfly Communications Co ltd
Current assignee: Takfly Communications Co ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2022-08-12

Abstract

The application discloses an optical fiber curing oven, which comprises a mounting rack; the quartz tube is arranged on the mounting frame and is provided with a gas inlet end and a gas outlet end in the length direction; the curing light source is fixedly arranged on the mounting frame, and the light outlet faces to the side wall of the quartz tube; the gas pumping piece is covered and arranged at the gas outlet end of the quartz tube and used for pumping out the gas carrying impurities in the quartz tube; the exhaust piece comprises an exhaust plug, and the exhaust plug covers the gas outlet end of the quartz tube; the exhaust plug is provided with a plurality of exhaust holes and an optical fiber mounting hole for penetrating an optical fiber, the optical fiber penetrates through the optical fiber mounting hole along the axis direction of the quartz tube, and the exhaust holes are symmetrically arranged around the axis of the quartz tube. The technical scheme can ensure the stability of the airflow, thereby effectively preventing the optical fiber from shaking and effectively improving the curing effect.

Description

Optical fiber curing oven

Technical Field

The application relates to the technical field of optical fiber production equipment, in particular to an optical fiber curing furnace.

Background

The optical fiber consists of three structures, namely a fiber core, a cladding and a coating, wherein the fiber core part is high-refractive-index glass, the surface layer part is low-refractive-index glass or plastic, and light is transmitted in the fiber core, is continuously subjected to total reflection at the junction of the surface layer and is transmitted forwards along the zigzag shape.

The stripping force of the coating of the communication optical fiber is determined by the outer coating of the optical fiber; the pullout force of the coating, i.e., the adhesion of the inner coating of the optical fiber to the silica glass cladding, depends on the inner coating of the optical fiber. In the conventional scheme, the coating is cured by heating the coating layer by a heating sheet or irradiating UV glue on the optical fiber with ultraviolet light. However, the curing effect is poor because the oxygen content affects the curing of the coating during the process of curing the optical fiber coating. Therefore, the optical fiber is generally passed through a transparent quartz tube, and the oxygen content inside the quartz tube is maintained within a suitable range by filling with nitrogen gas, and the flow of nitrogen gas is maintained so that the volatilized impurities are drawn away.

However, since the diameter of light is generally small, in the process of nitrogen gas entering and exiting from the quartz tube, the pumping pressure is large, which easily causes the optical fiber to shake, and affects the smoothness of the coating surface curing, thereby causing the curing effect to be poor.

Disclosure of Invention

In order to solve the problem that the curing effect is poor due to the fact that the optical fiber is easy to shake in the prior art,

the application provides an optical fiber curing oven adopts following scheme:

an optical fiber curing oven comprises a mounting frame;

the quartz tube is arranged on the mounting frame and is provided with a gas inlet end and a gas outlet end in the length direction;

the curing light source is fixedly arranged on the mounting frame, and the light outlet faces to the side wall of the quartz tube;

the gas pumping piece is covered and arranged at the gas outlet end of the quartz tube and used for pumping out the gas carrying impurities in the quartz tube;

the exhaust piece comprises an exhaust plug, and the exhaust plug covers the gas outlet end of the quartz tube; the exhaust plug is provided with a plurality of exhaust holes and an optical fiber mounting hole for penetrating an optical fiber, the optical fiber penetrates through the optical fiber mounting hole along the axis direction of the quartz tube, and the exhaust holes are symmetrically arranged around the axis of the quartz tube.

Through adopting above-mentioned scheme, be provided with the core vent at the end of giving vent to anger of quartz capsule, the core vent is seted up a plurality of exhaust holes, through with a plurality of exhaust hole symmetrical arrangement and towards the quartz capsule axis to can make the air current in the quartz capsule comparatively stable, and then guarantee the stability of optic fibre installation. In the traditional technical scheme, because the problem that impurities are generated due to the fact that a coating is heated and volatilized in the optical fiber curing process exists, the generation of the impurities can cause poor surface smoothness after the curing is finished, the impurities are easily adhered to the inner wall of a quartz tube, the light transmittance of the quartz tube is affected, and the curing effect is further affected. Therefore, a large pumping force is usually required to effectively pump away the air flow carrying the volatile impurities, but since the optical fiber is usually thin in diameter, the strong air flow movement easily causes turbulence, affects the stability of the optical fiber, and causes poor curing effect. Among this application technical scheme, through encircle quartz capsule axis and symmetrical arrangement with a plurality of exhaust holes to make the exhaust hole towards the quartz capsule axis, when bleeding, because the equipartition of exhaust hole air exhaust dynamics symmetry is on optic fibre, make the optic fibre atress comparatively even, the effectual shake that has reduced optic fibre.

Optionally, the exhaust plug is provided with an exhaust chamber communicated with the quartz tube, the exhaust holes are arranged on the inner wall of the exhaust chamber, the exhaust chamber is gradually narrowed in the direction away from the quartz tube, and the opening directions of the exhaust holes face the axis of the quartz tube.

Through adopting above-mentioned scheme, because the exhaust hole all faces towards optic fibre for when the air current moved to the exhaust hole, be difficult for producing because the air current carries impurity to press close to optic fibre and produce impurity adhesion, lead to the problem of rough surface, thereby effectively guaranteed the solidification quality. And, the exhaust chamber narrows down to the direction of keeping away from the quartz capsule gradually to make the air current velocity of flow at the exhaust vent obtain certain promotion, thereby effectual reduced the time that the air current passed through the exhaust vent and increased the speed that the air current passed through the exhaust vent, under the unchangeable condition in exhaust vent quantity and aperture, because the air current velocity of flow becomes fast, make the exhaust vent difficult to block up.

Optionally, a sealing gasket is arranged at the opening of the exhaust chamber, the quartz tube is inserted into the opening of the exhaust chamber, and the sealing gasket is clamped between the exhaust chamber and the quartz tube.

Through adopting above-mentioned scheme, peg graft the quartz capsule at the opening part of this exhaust chamber to through being provided with seal ring, thereby guarantee sealed effect, the effectual interior oxygen content of control quartz capsule. And, through the mode of the removable grafting of the exhaust chamber of quartz capsule and core vent to in carrying out dismouting maintenance clearance to the quartz capsule, thereby promoted the convenient degree of whole dismouting.

Optionally, the quartz tube further comprises a heating plug, wherein the heating plug is slidably mounted in the quartz tube; the heating plug is provided with a heating wall which is attached to the inner wall of the quartz tube and is used for conducting heat to the inner wall of the quartz tube.

By adopting the scheme, the heating plug is arranged on the inner wall of the quartz tube in a sliding manner, is attached to the inner wall of the quartz tube to slide and is heated through the heating wall, so that the quartz tube can be cleaned. In the traditional technical scheme, after the transparent quartz tube is used for a long time, impurities generated in the curing process are inevitably attached to the inner wall of the quartz tube, so that the light transmission effect of the quartz tube is poor, and the subsequent curing effect is influenced. In the traditional technical scheme, the quartz tube is usually detached and soaked in a chemical agent, so that the quartz tube is cleaned; however, the technical means is easy to cause the corrosion of the quartz tube, and the light transmission performance and the service life of the quartz tube are influenced. In this application technical scheme, be provided with the heating stopper, need not to pull down the washing with the quartz capsule, heat the impurity clearance that can be with its adhesion through heating the wall to the inner wall of quartz capsule, promoted the convenient degree of clearance to can effectually prevent the chemical attack to the quartz capsule.

Optionally, a holding tank for holding the volatile impurities is arranged on the heating wall, and the holding tank surrounds the axis of the quartz tube.

Through adopting above-mentioned scheme, offer the holding tank that is used for holding the impurity that volatilizees on heating the wall, at the in-process that the heating stopper moved, be heated and the impurity that drops from the quartz capsule inner wall can hold in this holding tank to get rid of impurity is effectual from the quartz capsule inner wall.

Optionally, the heating device further comprises a driving piece for driving the heating plug, the driving piece is connected with two driving rods, and the two driving rods are simultaneously connected to one end, away from the exhaust plug, of the heating plug.

By adopting the scheme, the driving piece for driving the heating plug is arranged and is simultaneously connected with the heating plug through the two driving rods; the two driving rods are simultaneously connected with the heating plug, so that the motion stability of the heating plug can be improved; on the other hand, the driving force that two actuating levers provided the heating plug is comparatively stable, and the effectual circumferential direction who prevents the heating plug has further guaranteed the stability of this heating plug motion.

Optionally, the curing light source is a UVLED lamp.

By adopting the scheme, the UVLED lamp is used as a curing light source; the traditional curing machine adopting the mercury lamp mode adopts the mercury lamp light emitting mode, mercury is contained in a bulb, waste treatment and transportation are very troublesome, and the emitted short wave can enable oxygen in the air to react to generate ozone which is harmful to human bodies, an air draft exhaust system needs to be additionally arranged, and serious pollution can be caused to the environment due to improper treatment; and the UVLED adopts a semiconductor to emit light, so that no factor for polluting the environment is caused. Therefore, the UVLED is more environment-friendly. On the other hand, the UVLED lamp has long service life and low energy consumption.

Optionally, the mounting frame includes a support frame for mounting the quartz tube, and the support frame is detachably connected to the quartz tube.

By adopting the above scheme, through support frame and quartz capsule detachable connection to dismantle the quartz capsule. And, because quartz capsule itself can with exhaust plug detachable connection, the two mutually supports for the convenient degree of dismouting of quartz capsule further promotes, thereby has promoted the convenient degree of whole dismouting clearance.

Optionally, a transfer chamber is formed on the exhaust plug, and the exhaust holes are communicated with the transfer chamber; the air exhaust piece also comprises an exhaust pipe, and the exhaust pipe is communicated with the transfer chamber; the exhaust pipe is provided with a narrowing part communicated with the transfer chamber, and the narrowing part is an elastic hose.

By adopting the scheme, the exhaust pipe is provided with the narrowing part, and the narrowing part is an elastic hose. In the traditional technical scheme, impurities carried in the air flow are possibly deposited and adhered to the inner wall of the exhaust pipe due to low flow speed in the air exhaust process; among this application technical scheme, through the design of constriction portion, accelerated the velocity of flow of air current at constriction portion to the flexible hose of constriction portion can shake because of the velocity of flow change, thereby will probably adhere to the impurity shake at the exhaust pipe inner wall, thereby guaranteed exhaust effect.

Optionally, still include the arc speculum, the arc speculum is installed on the mounting bracket, the arc speculum with the solidification light source is located quartz capsule circumference opposite both sides, just the mirror surface orientation of arc speculum the quartz capsule axis.

Through adopting above-mentioned scheme, set up the solidification light source in one side of quartz capsule, relative opposite side sets up the arc speculum to can reflect back light, guarantee the illumination degree of consistency to optic fibre. In the traditional technical scheme, because a curing light source generally irradiates on an optical fiber in a single direction, the irradiation uniformity is difficult to ensure, and the curing effect is poor; in other solutions, the optical fiber and the curing light source are rotated relatively to ensure the uniformity of the irradiation, but the structure is complicated and the cost is high. This application technical scheme is through setting up the arc speculum to can be convenient launch the another side to optic fibre with light, thereby guarantee to the degree of consistency that optic fibre shines, the effectual degree of consistency that promotes the solidification.

To sum up, the present application includes at least the following beneficial technical effects:

1. in the traditional technical scheme, because the problem that impurities are generated due to the fact that a coating is heated and volatilized in the optical fiber curing process exists, the generation of the impurities can cause poor surface smoothness after the curing is finished, the impurities are easily adhered to the inner wall of a quartz tube, the light transmittance of the quartz tube is affected, and the curing effect is further affected. Therefore, a large pumping force is usually required to effectively pump away the air flow carrying the volatile impurities, but since the optical fiber is usually thin in diameter, the strong air flow movement easily causes turbulence, affects the stability of the optical fiber, and causes poor curing effect. Among this application technical scheme, through encircle quartz capsule axis and symmetrical arrangement with a plurality of exhaust holes to make the exhaust hole towards the quartz capsule axis, when bleeding, because the equipartition of exhaust hole air exhaust dynamics symmetry is on optic fibre, make the optic fibre atress comparatively even, the effectual shake that has reduced optic fibre.

2. Because the exhaust hole all faces towards optic fibre for when the air current moved to the exhaust hole, be difficult for producing because the air current carries impurity and presses close to optic fibre and produce impurity adhesion, lead to the problem of surface roughness, thereby effectively guaranteed the solidification quality. The exhaust chamber is gradually narrowed towards the direction far away from the quartz tube, so that the flow velocity of the air flow at the exhaust hole is improved to a certain extent, the time of the air flow passing through the exhaust hole is effectively reduced, the speed of the air flow passing through the exhaust hole is increased, and under the condition that the number and the aperture of the exhaust holes are not changed, the exhaust hole is not easy to block due to the fact that the flow velocity of the air flow is increased;

3. the heating plug is arranged on the inner wall of the quartz tube in a sliding mode, is attached to the inner wall of the quartz tube to slide and is heated through the heating wall, and therefore the quartz tube can be cleaned. In the traditional technical scheme, after the transparent quartz tube is used for a long time, impurities generated in the curing process are inevitably attached to the inner wall of the quartz tube, so that the light transmission effect of the quartz tube is poor, and the subsequent curing effect is influenced. In the traditional technical scheme, the quartz tube is usually detached and soaked in a chemical agent, so that the quartz tube is cleaned; however, the technical means is easy to cause the corrosion of the quartz tube, and the light transmission performance and the service life of the quartz tube are influenced. In this application technical scheme, be provided with the heating stopper, need not to pull down the washing with the quartz capsule, heat the impurity clearance that can be with its adhesion through heating the wall to the inner wall of quartz capsule, promoted the convenient degree of clearance to can effectually prevent the chemical attack to the quartz capsule.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a top view of a cross-sectional view of an embodiment of the present application showing the internal structure of an air extracting member;

FIG. 3 is an enlarged view of the inner structure of the vent plug at A according to the present embodiment;

FIG. 4 is an enlarged view of the embodiment of the present application taken at B to highlight the internal structure of the heating plug;

FIG. 5 is an exploded view of an embodiment of the present application along the axis of a quartz tube.

Description of reference numerals:

1. a mounting frame; 11. a cross beam; 12. a support frame; 121. an arc-shaped clamping piece; 122. a bearing part; 13. a support platform;

2. a quartz tube; 21. an air inlet end; 22. an air outlet end; 23. an air inlet limiting plate; 231. a third mounting hole; 232. an air inlet;

3. a curing light source;

4. an air extraction member; 41. a vent plug; 411. an exhaust hole; 412. an optical fiber mounting hole; 413. an exhaust chamber; 414. an annular limiting plate; 415. a sealing gasket; 416. a second mounting hole; 417. an air outlet through hole; 42. an exhaust pipe; 421. a narrowing portion; 422. an air extraction part;

5. an arc-shaped reflector; 51. a lens mount;

6. a heating plug; 61. a resistance wire; 62. heating the wall; 621. accommodating grooves; 63. a drive member; 631. a drive rod.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses an optical fiber curing oven.

Referring to fig. 1 and 2, an optical fiber curing oven includes: the curing light source comprises a mounting frame 1, a quartz tube 2, a curing light source 3 and an air pumping piece 4, wherein the quartz tube 2 is mounted on the mounting frame 1, the quartz tube 2 is provided with an air inlet end 21 and an air outlet end 22 in the axial direction, and an optical fiber penetrates through the quartz tube 2 along the axial direction; the curing light source 3 is arranged on the mounting frame 1, and the light outlet of the curing light source faces the side wall of the quartz tube 2 so as to provide irradiation light to the optical fiber positioned in the quartz tube 2; the exhaust member 4 is installed at the outlet end 22 of the quartz tube 2, and nitrogen gas is introduced from the inlet end 21 of the quartz tube 2 and exhausted from the exhaust member 4, thereby ensuring proper oxygen concentration in the quartz tube 2 and bringing out the volatilized impurities.

Referring to fig. 1 and 2, the mounting frame 1 comprises a carrier for mounting the curing light source 3, which carrier has a cross beam 11 at the top, the curing light source 3 being fixedly mounted on the cross beam 11. In the embodiment of the present application, the curing light sources 3 are UVLED lamps, the number of the curing light sources 3 is three, the three curing light sources 3 are arranged in parallel along the length direction of the cross beam 11, and light outlets of the curing light sources 3 face the side wall of the quartz tube 2 to emit ultraviolet light to the quartz tube 2. It should be noted that, in the optical fiber curing furnace, the quartz tube 2 is made of transparent material, which is common knowledge and will not be described herein.

Referring to fig. 1 and 2, the mounting bracket 1 further includes two support frames 12, the two support frames 12 are arranged in parallel below the cross beam 11 to detachably mount the quartz tube 2, so that the quartz tube 2 is located right below the cross beam 11 and the length directions of the two are the same. Specifically, the arc-shaped clamping piece 121 is arranged on the support frame 12, the arc-shaped clamping piece 121 is adapted to the diameter of the quartz tube 2, the arc-shaped clamping piece 121 has elasticity, and when the quartz tube 2 is clamped in the arc-shaped clamping piece 121, the arc-shaped clamping piece 121 deforms to generate pressure resistance pointing to the outer wall of the quartz tube 2, so that the quartz tube 2 can be detachably clamped and installed. In the embodiment of the present application, the arc-shaped clamping piece 121 is located at the high end of the support frame 12, and the low end of the support frame 12 has a supporting portion 122 capable of being stably placed on the working plane, and the supporting portion 122 is of a tetragonal structure, so that the support frame 12 can be stably placed.

Referring to fig. 2 and 3, the optical fiber curing oven further includes an arc-shaped reflector 5 and a lens mounting seat 51, the lens mounting seat 51 is located under the quartz tube 2, and the arc-shaped reflector 5 is fixedly mounted on the lens mounting seat 51, so that the arc-shaped reflector 5 and the curing light source 3 are respectively located at two opposite sides of the quartz tube 2. The arc-shaped reflecting mirror 5 has a mirror surface in an arc shape, and the mirror surface of the arc-shaped reflecting mirror 5 faces the axis of the quartz tube 2. It should be noted that, in the embodiment of the present application, the optical fiber is installed along the axis of the quartz tube 2, and therefore, the mirror surface of the arc-shaped reflector 5 faces the optical fiber to reflect the light emitted by the curing light source 3 onto the optical fiber, so as to improve the curing effect on the optical fiber.

Referring to fig. 2 and 3, the exhaust member 4 includes an exhaust plug 41 and an exhaust tube 42, the exhaust plug 41 covers the gas outlet end 22 of the quartz tube 2, one end of the exhaust tube 42 is communicated with the exhaust plug 41, and the other end is connected to an exhauster, so that the gas is exhausted from the quartz tube 2 to the outside.

Referring to fig. 2 and 3, in particular, the exhaust plug 41 has an exhaust chamber 413 communicated with the quartz tube 2, the exhaust chamber 413 has a chamber opening facing the gas outlet 22 of the quartz tube 2, the chamber opening has an annular limiting plate 414, and the quartz tube 2 is inserted into the annular limiting plate 414 to realize the detachable connection of the quartz tube 2 and the exhaust plug 41. It should be noted that the inner wall of the annular limiting plate 414 is installed with a sealing washer 415, so that when the quartz tube 2 is inserted into the exhaust plug 41, the sealing washer 415 is pressed to be clamped between the annular limiting plate 414 and the outer wall of the quartz tube 2, so as to seal the gap between the exhaust chamber 413 and the quartz tube 2.

Referring to fig. 2 and 3, the exhaust chamber 413 is gradually narrowed in a direction away from the quartz tube 2, specifically, the exhaust plug 41 has a plurality of exhaust holes 411 and a plurality of optical fiber installation holes 412, the optical fiber installation holes 412 are located on the axis of the quartz tube 2 and on an inner wall of one end of the exhaust chamber 413 away from the quartz tube 2, and the exhaust chamber 413 is gradually narrowed from the ring-shaped limiting plate 414 to the optical fiber installation holes 412.

Referring to fig. 2 and 3, a plurality of exhaust holes 411 are disposed on an inner wall of the exhaust chamber 413 around an axis of the quartz tube 2 and are symmetrical with respect to the axis. It should be noted that, in the embodiment of the present application, since the exhaust chamber 413 is gradually narrowed toward a direction away from the quartz tube 2, the inner wall of the exhaust chamber 413 is inclined toward the axis of the quartz tube 2 by the annular limiting plate 414. The opening direction of exhaust hole 411 all faces this 2 axes of quartz capsule, and a plurality of exhaust holes 411 all face optic fibre promptly to provide stable air exhaust dynamics to optic fibre, guarantee the stability of optic fibre. It should be mentioned that the optical fiber installation hole 412 is provided with a first elastic washer, and the diameter of the inner ring of the first elastic washer is adapted to the inner diameter of the optical fiber, so that the optical fiber is installed in a clamping manner, and the stability of the optical fiber is further ensured. It should be mentioned that, in the embodiment of the present application, a second mounting hole 416 for the optical fiber to pass through is disposed at one end of the exhaust plug 41 away from the quartz tube 2, and a second elastic washer is disposed in the second mounting hole 416, so as to further improve the stability of the optical fiber installation.

Referring to fig. 2 and 3, the exhaust plug 41 further defines a transfer chamber, and each exhaust hole 411 is connected to the transfer chamber through a corresponding air channel, so that the gas in the quartz tube 2 can enter the transfer chamber through the exhaust hole 411. The exhaust plug 41 is further provided with an air outlet through hole 417 in a penetrating manner, one end of the air outlet through hole 417 is communicated with the transfer chamber, and the other end is communicated with the exhaust pipe 42.

Referring to fig. 3 and 4, the exhaust pipe 42 has a narrowing portion 421 for connecting with the exhaust plug 41 and an air extracting portion 422 connected with the air extractor, the narrowing portion 421 is gradually narrowed from one end near the air extracting portion 422 to one end near the exhaust plug 41, and the narrowing portion 421 is made of an elastic hose so that the narrowing portion 421 is shaken to reduce the adhesion of impurities when the flow rate of the air flow changes at the narrowing portion 421. In the embodiment of the present application, since the structure of the air extractor is common knowledge, it is not described herein nor shown in the drawings.

Referring to fig. 4 and 5, the optical fiber curing furnace further comprises a heating plug 6, wherein the heating plug 6 is substantially in a shape of a disc, the heating plug 6 is slidably mounted in the quartz tube 2, and a resistance wire 61 for heating is arranged inside the heating plug 6; the heating plug 6 has a heating wall 62 attached to the inner wall of the quartz tube 2, and the heating wall 62 is made of a heat conductive material. In the embodiment of the present application, the heating wall 62 is made of graphene material to conduct heat to the inner wall of the quartz tube 2.

Referring to fig. 4 and 5, an annular accommodating groove 621 is further formed in the heating wall 62, the annular accommodating groove 621 is disposed around the axis of the quartz tube 2, and the accommodating groove 621 is located in the middle of the heating wall 62, so that when the heating plug 6 moves in the quartz tube 2, impurities scraped from the inner wall of the quartz tube 2 by heating fall into the annular accommodating groove 621, and thus the light transmittance of the cleaned part is ensured.

Referring to fig. 4 and 5, a driving member 63 for driving the heating plug 6 is further included, and in the embodiment of the present application, the driving member 63 is a cylinder; the mounting frame 1 further comprises a supporting platform 13 for mounting the driving member 63, the driving member 63 is fixedly mounted on the supporting platform 13, and the output shaft of the driving member 63 is arranged parallel to the axial direction of the quartz tube 2. The driving frame is connected to the output shaft of the driving member 63, two driving rods 631 are arranged on the driving frame, and the two driving rods 631 are connected to one end of the heating plug 6 far away from the exhaust plug 41 at the same time, so that the driving member 63 can work to drive the heating plug 6 to reciprocate in the quartz tube 2 to clean impurities. It should be mentioned that the resistance wire 61 in the heating plug 6 is electrically connected with the outside to supply power to the resistance wire 61 for heating, and the specific wiring diagram is not shown.

Referring to fig. 4 and 5, in the embodiment of the present application, the gas inlet end 21 of the quartz tube 2 is covered and mounted with the gas inlet limiting plate 23, the gas inlet limiting plate 23 is provided with a third mounting hole 231 for passing the optical fiber, a third elastic washer is disposed in the third mounting hole 231, and an inner diameter of the third elastic washer is adapted to an inner diameter of the optical fiber, so that the optical fiber is clamped and mounted. Similarly, the heating plug 6 is also provided with a fourth mounting hole for the optical fiber to pass through. And a plurality of air passing holes are formed in the heating plug 6 for air flow to pass through. The gas inlet limiting plate 23 is provided with three gas inlets 232 for inputting nitrogen, and the gas inlets 232 are communicated with a nitrogen input device, so as to keep stable nitrogen input into the quartz tube 2.

The implementation principle of the optical fiber curing furnace in the embodiment of the application is as follows: through locating solidification light source 3 and speculum cloth in the both sides that quartz capsule 2 is relative to with light reflection back optic fibre department, guarantee optic fibre solidification effect. And, through the setting of a plurality of exhaust holes 411 slope towards light in the piece 4 of taking out air, a plurality of exhaust holes 411 are around 2 axis symmetric arrangements of quartz capsule to the dynamics of bleeding that apply to the light when making to bleed is comparatively balanced, and then the effectual stability that has promoted optic fibre among the optic fibre curing process. And, after the optic fibre solidification, can slide in quartz capsule 2 through driving piece 63 drive heating stopper 6 to the volatile impurity of clearance quartz capsule 2 inner wall guarantees quartz capsule 2's light transmittance, further promotes the solidification effect.

The embodiments of the present invention are preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, wherein like parts are denoted by like reference numerals. Therefore, the method comprises the following steps: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. An optical fiber curing oven, comprising:

a mounting frame (1);

the quartz tube (2) is arranged on the mounting rack (1) and is provided with a gas inlet end (21) and a gas outlet end (22) in the length direction;

the curing light source (3) is fixedly arranged on the mounting rack (1), and the light outlet faces the side wall of the quartz tube (2);

the gas extraction piece (4) is arranged at the gas outlet end (22) of the quartz tube (2) in a covering mode and used for extracting gas carrying impurities in the quartz tube (2);

the air exhaust piece (4) comprises an air exhaust plug (41), and the air exhaust plug (41) covers the air outlet end (22) of the quartz tube (2); the exhaust plug (41) is provided with a plurality of exhaust holes (411) and an optical fiber mounting hole (412) for penetrating an optical fiber, the optical fiber penetrates through the optical fiber mounting hole (412) along the axial direction of the quartz tube (2), and the exhaust holes (411) are symmetrically arranged around the axial direction of the quartz tube (2).

2. The optical fiber curing furnace as claimed in claim 1, wherein the exhaust plug (41) has an exhaust chamber (413) communicated with the quartz tube (2), the exhaust holes (411) are arranged on the inner wall of the exhaust chamber (413), the exhaust chamber (413) is gradually narrowed in a direction away from the quartz tube (2), and the opening directions of the exhaust holes (411) are all towards the axis of the quartz tube (2).

3. The optical fiber curing oven as claimed in claim 2, wherein a sealing gasket (415) is arranged at the opening of the exhaust chamber (413), the quartz tube (2) is inserted into the opening of the exhaust chamber (413), and the sealing gasket (415) is clamped between the exhaust chamber (413) and the quartz tube (2).

4. An optical fiber curing oven according to claim 1, further comprising a heating plug (6), wherein the heating plug (6) is slidably mounted in the quartz tube (2); the heating plug (6) is provided with a heating wall (62) attached to the inner wall of the quartz tube (2), and the heating wall (62) is used for conducting heat to the inner wall of the quartz tube (2).

5. The optical fiber curing oven as claimed in claim 4, wherein the heating wall (62) is opened with a holding groove (621) for holding volatile impurities, and the holding groove (621) surrounds the axis of the quartz tube (2).

6. The optical fiber curing oven according to claim 5, further comprising a driving member (63) for driving the heating plug (6), wherein two driving rods (631) are connected to the driving member (63), and the two driving rods (631) are simultaneously connected to an end of the heating plug (6) away from the venting plug (41).

7. An optical fiber curing oven according to claim 1, characterized in that the curing light source (3) is a UVLED lamp.

8. An optical fiber curing oven according to claim 1, characterized in that the mounting frame (1) comprises a support frame (12) for mounting the quartz tube (2), and the support frame (12) is detachably connected with the quartz tube (2).

9. The optical fiber curing oven according to claim 1, wherein the exhaust plug (41) is provided with a transfer chamber, and the exhaust holes (411) are all communicated with the transfer chamber; the air exhaust part (4) further comprises an exhaust pipe (42), and the exhaust pipe (42) is communicated with the transfer chamber; the exhaust pipe (42) is provided with a narrowing part (421) communicated with the transfer chamber, and the narrowing part (421) is an elastic hose.

10. The optical fiber curing furnace according to claim 1, further comprising an arc reflector (5), wherein the arc reflector (5) is installed on the installation frame (1), the arc reflector (5) and the curing light source (3) are located on two circumferentially opposite sides of the quartz tube (2), and the mirror surface of the arc reflector (5) faces the axis of the quartz tube (2).