CN213680400U - Optical fiber perform tapering lathe - Google Patents
Optical fiber perform tapering lathe Download PDFInfo
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- CN213680400U CN213680400U CN202022726910.1U CN202022726910U CN213680400U CN 213680400 U CN213680400 U CN 213680400U CN 202022726910 U CN202022726910 U CN 202022726910U CN 213680400 U CN213680400 U CN 213680400U
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- quartz furnace
- optical fiber
- lathe
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- hearth
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Abstract
The utility model relates to an optical fiber perform draws awl lathe, including the lathe bed, be equipped with the longitudinal rail on the lathe bed, installed left chuck and right chuck respectively in the both sides of lathe bed, installed the removal slide on the longitudinal rail, installed main quartz furnace on the removal slide, its characterized in that is provided with supplementary slide in one side of removing the slide, has installed supplementary quartz furnace on the supplementary slide. The utility model discloses an auxiliary quartz furnace is to the supplementary heat preservation of the awl of moving out main quartz furnace effectively reduced awl back pyramis temperature cooling rate, reduce the stress in the twinkling of an eye that produces below permanent stress that produces near glass transition temperature and the glass transition temperature, ensure that there is not the pyramis to explode the problem in the pyramis cooling process, and also stopped wire drawing and started the problem that the pyramis explodes and splits among the secondary heating process, improved optical fiber perform's awl quality and raw materials utilization ratio, promoted the manufacturing efficiency of optic fibre. The utility model discloses simple structure, convenient to use, performance is reliable.
Description
Technical Field
The utility model relates to an optical fiber perform tapering lathe belongs to optical fiber processing manufacture equipment technical field.
Background
The optical fiber is formed by high-temperature melting and drawing of an optical fiber preform, and before drawing, the drawing end of the optical fiber preform needs to be made into a conical shape, so that the optical fiber preform can enter the next drawing process to draw out qualified optical fiber. The process of making the ends of the optical fiber prefabricated rods into the cone is also called tapering and is made by drawing the ends of two prefabricated rods in a high-temperature melting state. The optical fiber preform which is used as a quartz glass material is easy to generate internal stress after hot processing, if the thermal treatment is improper, the problem of local burst of the preform is easily caused, and the tapering manufacturing link in the hot processing is particularly obvious. At present, in order to further reduce the manufacturing cost of optical fibers, the size of the preform is developed towards the direction of larger outer diameter, along with the increase of the outer diameter, after the preform is tapered at high temperature, the cone glass is cooled to the glass state from the high-temperature viscous flow state, the temperature difference between the inside and the outside of the preform body is larger, the generated thermal stress is also larger, the problem of cone burst is more easily caused in the cold processing after the tapering and the subsequent preform drawing process, in order to avoid the problem, the heat treatment after the tapering of the optical fiber preform is required to be strengthened, but the existing preform tapering lathe is of a single tapering combustion furnace structure, and the requirement of fully performing the heat treatment after the tapering of the optical fiber preform is difficult to meet.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough an optical fiber perform draws awl lathe to above-mentioned prior art exists is provided, and it can effectively avoid optical fiber perform's pyramis to explode and split, improves and draws the awl quality.
The utility model discloses a solve the technical scheme that the problem that the aforesaid provided adopted and be: the quartz crucible furnace comprises a lathe bed, wherein a longitudinal guide rail is arranged on the lathe bed, a left chuck and a right chuck are respectively arranged on two sides of the lathe bed, a movable sliding seat is arranged on the longitudinal guide rail, and a main quartz furnace is arranged on the movable sliding seat.
According to the scheme, the auxiliary quartz furnace comprises a quartz furnace body, a hearth with two through ends is formed in the quartz furnace body, and an auxiliary blowtorch is arranged in the hearth.
According to the scheme, the main quartz furnace comprises a main quartz furnace body, a main hearth with two through ends is formed in the main quartz furnace body, and a main blast lamp is arranged in the main hearth.
According to the scheme, the axis of the auxiliary quartz furnace hearth is coincident with the axis of the main hearth and is coincident with the axes of the left chuck and the right chuck.
According to the scheme, the axial line of the auxiliary quartz furnace hearth and the axial line of the main quartz furnace hearth are parallel to the longitudinal guide rail.
According to the scheme, the auxiliary quartz furnace body is composed of a metal support and quartz bricks, the hearth is a square cross-section hole, the side length is 300-500 mm, the optical fiber perform can pass through the hearth, and an auxiliary blowtorch is arranged at the center position right below the inner hole.
According to the scheme, the auxiliary blowtorch is a propane and oxygen mixed combustion blowtorch.
The utility model has the advantages that: 1. the auxiliary heat preservation of the drawing cone moving out of the main quartz furnace through the auxiliary quartz furnace effectively reduces the cooling rate of the cone temperature after the drawing cone, reduces the permanent stress generated near the glass transition temperature and the transient stress generated below the glass transition temperature, ensures that the problem of cone burst does not exist in the cone cooling process, and avoids the problem of cone burst in the secondary heating process of the drawing head, thereby improving the drawing cone quality and the raw material utilization rate of the optical fiber perform and improving the manufacturing efficiency of the optical fiber. 2. The utility model discloses simple structure, convenient to use, performance is reliable.
Drawings
Fig. 1 is a schematic view of the structure and the tapering according to an embodiment of the present invention.
Fig. 2 is a schematic view of the heat preservation process after tapering.
FIG. 3 is a graph comparing the temperature profile over time for free cooling with and without the use of an auxiliary quartz furnace.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
The quartz furnace comprises a bed body, wherein a longitudinal guide rail 9 is arranged on the bed body, a left chuck 7 and a right chuck 8 are respectively arranged on two sides of the bed body, a movable sliding seat 11 is arranged on the longitudinal guide rail, a main quartz furnace 1 is arranged on the movable sliding seat, the main quartz furnace comprises a main quartz furnace body, a main furnace chamber with two through ends is arranged in the main quartz furnace body, a main blast lamp 6 is arranged in the main furnace chamber, and the main blast lamp is a propane-oxygen mixed combustion blast lamp. An auxiliary sliding seat 10 is arranged on one side of the movable sliding seat, and an auxiliary quartz furnace 4 is arranged on the auxiliary sliding seat; the main quartz furnace and the auxiliary quartz furnace can move back and forth along the longitudinal guide rail, the auxiliary quartz furnace comprises a quartz furnace body, a hearth with two through ends is formed in the quartz furnace body, an auxiliary blowtorch is arranged in the hearth, the auxiliary quartz furnace body is composed of a metal support and quartz bricks, the hearth is a square cross-section hole, the side length is 400mm, an optical fiber perform rod can pass through the hearth, the auxiliary blowtorch 5 is arranged at the center position under an inner hole, and the auxiliary blowtorch is a propane-oxygen mixed combustion blowtorch. The axis of the auxiliary quartz furnace hearth is coincident with the axis of the main hearth and is coincident with the axes of the left chuck and the right chuck. Meanwhile, the axes of the auxiliary quartz furnace hearth and the main hearth are parallel to the longitudinal guide rail.
The utility model discloses a use does: two prefabricated rods or sleeves to be tapered are correspondingly clamped at two ends of a tapering lathe respectively, the left prefabricated rod respectively passes through a left chuck 7 and an auxiliary quartz furnace 4 to a main hearth of a main quartz furnace 1, the right prefabricated rod respectively passes through a right chuck 8 to the main hearth of the main quartz furnace 1, the axes of the two prefabricated rods are superposed, the left chuck and the right chuck are fixed, the two prefabricated rods synchronously rotate, a propane oxygen main blowtorch 6 in the main quartz furnace is ignited to heat the prefabricated rods, small flame is firstly used for preheating for 15-25 minutes at the preheating temperature of 400-, and moving the auxiliary quartz furnace to the A cone, enabling the diameter-changing area of the A cone to be in the middle area of the auxiliary quartz furnace, turning on a propane oxygen blast lamp 5 right below the auxiliary quartz furnace, heating the auxiliary quartz furnace in alignment with the diameter-changing area for 20 minutes, turning off a heating source, compensating the heat loss of the A cone, reducing the cooling rate of the A cone, and keeping the B cone in the main quartz furnace to slowly cool by using the rest heat. FIG. 3 is a comparison of the temperature curves of the A cone with and without the auxiliary quartz furnace, showing that the cooling rate of the cone is obviously faster than that after heat preservation, and the auxiliary quartz furnace can effectively reduce the permanent stress generated around the glass transition temperature and the transient stress generated below the glass transition temperature. Optical fiber perform be solid optical fiber perform, optical fiber perform sleeve pipe or optical fiber perform plug. The outer diameters of the two optical fiber prefabricated rods are the same or similar.
Claims (7)
1. A taper lathe for optical fibre prefabricated rod is composed of a lathe body with longitudinal guide track, left and right chucks on both sides of said lathe body, a movable slide carriage on said longitudinal guide track, and a main quartz furnace on said movable slide carriage.
2. The optical fiber preform tapering lathe of claim 1, wherein said auxiliary quartz furnace comprises a quartz furnace body, a hearth having two ends penetrating therethrough is formed in the quartz furnace body, and an auxiliary torch is disposed in the hearth.
3. The optical fiber preform tapering lathe of claim 2, wherein said main quartz furnace comprises a main quartz furnace body, a main furnace chamber having two ends penetrating is formed in the main quartz furnace body, and a main torch is disposed in the main furnace chamber.
4. The optical fiber preform tapering lathe of claim 3 wherein the axis of the auxiliary quartz furnace hearth coincides with the axis of the main hearth and with the axes of the left and right chucks.
5. The optical fiber preform tapering lathe of claim 4 wherein the axis of the secondary quartz furnace hearth and the axis of the primary hearth are parallel to the longitudinal rail.
6. The optical fiber preform tapering lathe as claimed in claim 2, wherein the auxiliary quartz furnace body is formed of a metal holder and a quartz brick, the hearth is a square-section hole having a side length of 300 to 500mm, the optical fiber preform can be passed through the hearth, and an auxiliary torch is provided at a central position right below the inner hole.
7. The optical fiber preform draw-taper lathe of claim 6, wherein said auxiliary burner is a propane-oxygen hybrid combustion burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022726910.1U CN213680400U (en) | 2020-11-23 | 2020-11-23 | Optical fiber perform tapering lathe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022726910.1U CN213680400U (en) | 2020-11-23 | 2020-11-23 | Optical fiber perform tapering lathe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213680400U true CN213680400U (en) | 2021-07-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022726910.1U Active CN213680400U (en) | 2020-11-23 | 2020-11-23 | Optical fiber perform tapering lathe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213680400U (en) |
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2020
- 2020-11-23 CN CN202022726910.1U patent/CN213680400U/en active Active
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