CN113772946A - Structure and method for preventing cone head of optical fiber preform from cracking and storage medium - Google Patents
Structure and method for preventing cone head of optical fiber preform from cracking and storage medium Download PDFInfo
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- CN113772946A CN113772946A CN202111234237.2A CN202111234237A CN113772946A CN 113772946 A CN113772946 A CN 113772946A CN 202111234237 A CN202111234237 A CN 202111234237A CN 113772946 A CN113772946 A CN 113772946A
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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
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
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- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1927—Control of temperature characterised by the use of electric means using a plurality of sensors
- G05D23/193—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces
- G05D23/1931—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces to control the temperature of one space
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Abstract
The invention provides a structure, a method and a storage medium for preventing an optical fiber preform taper head from cracking, which comprises the following steps: the temperature monitor is used for recording the temperatures of the burning point of the baking lamp and the position of the deposition point of the blast lamp in real time; recording the temperatures of the burning point of the burning lamp and the deposition point position of the blowtorch in real time according to a temperature monitor, and respectively calculating the average value of the temperatures of the burning point position of the burning lamp and the deposition point position of the blowtorch; determining a correction coefficient m according to the difference value of the average value of the temperatures of the burning point positions of the baking lamps and the average value of the temperatures of the deposition point positions of the blowtorch; the flow of the combustion gas is corrected and adjusted through the correction coefficient m so as to reduce the heat deviation between the conical head of the optical fiber preform and the deposition effective section of the optical fiber preform; therefore, the problem of overlarge temperature deviation between the cone head and the deposition effective section in the deposition process of the optical fiber perform is solved, the cracking probability of the cone head of the optical fiber perform in the deposition process is effectively reduced, and the product quality is improved.
Description
Technical Field
The invention relates to the technical field of optical fibers, in particular to a structure, a method and a storage medium for preventing a conical head of an optical fiber preform from cracking.
Background
The OVD technology deposits the optical fiber perform, the optical fiber perform grows along the radial direction, during the growth process, the upper and lower cone positions and the effective section position are easy to generate larger density gradient, the cracking phenomenon can occur during the deposition process, and the cracking of the optical fiber perform can be easily caused during the subsequent sintering process.
Patent document 104086080, a deposition apparatus and a method for increasing the density of an optical fiber preform, adds a baking lamp to a torch at an upper/lower angle, and this method can solve the problem of cracking caused by a small overall density of the optical fiber preform, but cannot solve the problem of an excessive density deviation between the position of the taper head and the effective section. The too large density deviation between the cone head position and the deposition effective section can cause the cone head of the optical fiber preform rod to crack, and great hidden danger is brought to production.
Disclosure of Invention
In order to solve the technical problems, the invention provides a structure, a method and a storage medium for preventing the cone head of an optical fiber preform from cracking, solves the problem of overlarge temperature deviation between the cone head and the position of a deposition effective section in the deposition process of the optical fiber preform, effectively reduces the probability of cracking of the cone head of the optical fiber preform in the deposition process, and improves the product quality.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for preventing the cone head of an optical fiber preform from cracking comprises the following steps:
installing a baking lamp and a blast lamp: installing a plurality of blowlamps in the same vertical plane, wherein the vertical plane is parallel to the rotating central shaft of the optical fiber perform rod, installing a plurality of baking lamps in the vertical plane which is not in the same vertical plane with the blowlamps, arranging the baking lamps on the vertical shaft of the baking lamps and connecting the baking lamps with the vertical shaft of the baking lamps, and arranging the baking lamps and the conical head of the optical fiber perform rod in an inclined opposite manner;
installing a temperature monitor: respectively installing temperature monitors at the burning point of the baking lamp and the deposition point of the blowtorch, wherein the temperature monitors are used for recording the temperatures of the burning point of the baking lamp and the deposition point of the blowtorch in real time when the rotating central shaft of the preform loose body rotates;
calculating the average value of the temperatures of the burning point positions of the baking lamps and the average value of the temperatures of the deposition point positions of the blowtorch: recording the temperatures of the burning point of the burning lamp and the deposition point position of the blowtorch in real time according to a temperature monitor, and respectively calculating the average value of the temperatures of the burning point position of the burning lamp and the deposition point position of the blowtorch;
determining a correction coefficient m: determining a correction coefficient m according to the difference value of the average value of the temperatures of the burning point positions of the baking lamps and the average value of the temperatures of the deposition point positions of the blowtorch;
the flow of the combustion gas is corrected and adjusted through the correction coefficient m so as to reduce the heat deviation between the conical head of the optical fiber preform body and the deposition effective section of the optical fiber preform body.
The invention provides a structure, a method and a storage medium for preventing a conical head of an optical fiber preform from cracking, solves the problem of overlarge temperature deviation between the conical head and a deposition effective section in the deposition process of the optical fiber preform, effectively reduces the cracking probability of the conical head of the optical fiber preform in the deposition process, and improves the product quality.
As a preferred technical scheme, 3 blowtorch deposition point temperature monitors are installed on the deposition effective section of the optical fiber perform rod by a first blowtorch, a second blowtorch and a third blowtorch, the three blowtorch deposition point temperature monitors are uniformly distributed on the deposition effective section of the optical fiber perform rod, the blowtorch deposition point temperature monitors are used for recording the position temperature of the burning point of the blowtorch and calculating the average value of the position temperature of the burning point of the blowtorch
Calculated by the following formula:
wherein, T1i、T2iAnd T3iThe deposition point temperature monitors of the 3 torches record the temperatures of the deposition points of the optical fiber preform corresponding to the first torch, the second torch, and the third torch, respectively.
As the preferred technical scheme, 2 burning point temperature monitors are installed at the conical head of the optical fiber preform rod, the 2 burning point temperature monitors are used for recording the temperatures of the positions near the burning points of the two burning lamps and calculating the average value of the temperatures of the burning point positions of the two burning lamps
Calculated by the following formula:
wherein, t1iAnd t2iThe temperature of the positions near the burning points of the 2 baking lamps is recorded for the 2 burning point temperature monitors respectively.
As a preferred technical scheme, the actual heat deviation Δ T of the deposition effective section of the optical fiber preform body from the taper head of the optical fiber preform body is calculated by the following calculation formula:
wherein
The average value of the temperatures of the burning point positions of a plurality of baking lamps,
the average value of the temperatures of the positions of the deposition points of a plurality of torches is obtained.
As a preferred technical scheme, according to the range comparison of the actual delta T deviation and the preset delta T deviation threshold, the value of a correction coefficient m is determined, the flow of the combustion gas is corrected and adjusted through the value of the correction coefficient m, and the corrected and adjusted flow v of the combustion gas is obtained through the calculation of the following calculation formula:
v＝v0m
in the formula: v. of0Indicating the flow of the combustion gas of the current baking lamp; m represents a correction coefficient.
The present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method for preventing the taper head of an optical fiber preform from cracking as described in any one of the above.
The invention provides a structure for preventing the cone head of an optical fiber preform from cracking, which comprises: a plurality of baking lamps and blowlamps, wherein the baking lamps are used for adjusting the density of the conical heads of the optical fiber preform rods, and the blowlamps are used for depositing SiO on the deposition effective section of the optical fiber preform rods2The burning point of the baking lamp is provided with dustThe device comprises a burning point temperature monitor of a baking lamp, wherein a deposition point temperature monitor of the baking lamp is arranged at a deposition point position of the blowing lamp, the burning point temperature monitor of the baking lamp and the deposition point temperature monitor of the blowing lamp are both electrically connected with a processor, the processor is electrically connected with a controller, and the controller is used for controlling the flow of burning gas of the baking lamp.
The first blowtorch is positioned above the second blowtorch, the second blowtorch is positioned above the third blowtorch, the first blowtorch, the second blowtorch and the third blowtorch are all arranged in the same vertical plane, the baking lamp is not arranged in the vertical plane and is arranged above or below the cone head of the optical fiber perform along the rotation direction of the optical fiber perform, and the vertical plane is parallel to the rotation central shaft of the loose body of the optical fiber perform; the vertical positions of the first blowlamp, the second blowlamp, the third blowlamp and the baking lamp satisfy the following relational expressions: (a-b-c) is not less than 0 (c-d), wherein, a is the height of the deposit point distance this optical fiber perform bottom of this first blowtorch, b is the height of the deposit point distance this optical fiber perform bottom of second blowtorch, c is the height of the deposit point distance this optical fiber perform bottom of third blowtorch, d is the height of the burning point distance this optical fiber perform bottom of roast lamp, roast lamp horizontal position is the clockwise rotation angle theta of vertical axis along the center of rotation axle that first blowtorch, second blowtorch and third blowtorch formed, and theta angle satisfies 0 and not more than theta and not more than 60.
The preferable technical scheme comprises the following steps: the optical fiber perform drive assembly is connected with a rotating central shaft of the preform loose body, the rotating central shaft of the preform loose body penetrates through the optical fiber perform, the optical fiber perform drive assembly is electrically connected with the controller, and the controller controls the optical fiber perform drive assembly to drive the rotating central shaft of the preform loose body to rotate so as to drive the optical fiber perform to do reciprocating circular motion or rotating motion along the axial lead of the optical fiber perform.
The preferable technical scheme comprises the following steps: the lamp baking driving assembly is connected with the baking lamp, the lamp baking driving assembly is electrically connected with the controller, and the controller controls the lamp baking driving assembly to drive the baking lamp and the optical fiber preform to move synchronously.
Drawings
FIG. 1 is a structural view of a structure for preventing a taper head of an optical fiber preform from being cracked according to the present invention;
FIG. 2 is a flow chart of the present invention for preventing the taper head of an optical fiber preform from cracking.
Wherein: 1-a first torch; 2-a second torch; 3-a third torch; 4-baking a lamp; 41-a first baking lamp; 42-a second baking lamp; 5-a processor; 6-a controller; 7-conical head of optical fiber preform rod; 8-deposition effective section of the optical fiber preform body; 9-a baking lamp driving component; 10-an optical fiber preform driving assembly; 11-central axis of rotation of the preform loose body; 12-optical fiber preform.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
It is understood that the invention achieves the objects of the invention by means of some embodiments.
As shown in fig. 1, the present invention provides a structure for preventing a taper head of an optical fiber preform from being cracked, comprising: a plurality of baking lamps 4 and a plurality of blowlamps, the baking lamps 4 are used for adjusting the density of the taper heads of the optical fiber preform rods, and the blowlamps are used for depositing SiO on the deposition effective section of the optical fiber preform rods2A burning point temperature monitor (not shown) of a baking lamp is arranged at the burning point position of the baking lamp 4, a deposition point temperature monitor (not shown) of a torch is arranged at the deposition point position of the torch, the burning point temperature monitor (not shown) of the baking lamp and the deposition point temperature monitor (not shown) of the torch are both electrically connected with a processor 5, the processor 5 is electrically connected with a controller 6, and the controller 6 is used for controlling the flow of burning gas of the baking lamp; the optical fiber perform driving assembly 10 is connected with a rotating central shaft 11 of a preform loose body, the rotating central shaft 11 of the preform loose body penetrates through the optical fiber perform 12, the optical fiber perform driving assembly 10 is electrically connected with the controller 6, and the controller 6 controls the optical fiber perform driving assembly 10 to drive the rotating central shaft 11 of the preform loose bodyThe optical fiber perform rod 12 is driven by rotation to do reciprocating circular motion or rotary motion along the axis line; the baking lamp driving component 9 is connected with the baking lamp 4, the baking lamp driving component 9 is electrically connected with the controller 6, and the controller 6 controls the baking lamp driving component 9 to drive the baking lamp 4 and the optical fiber perform 12 to move synchronously.
The optical fiber preform 12 includes: the device comprises a deposition effective section 8 of the optical fiber preform body and a conical head 7 of the optical fiber preform body, wherein one end of the deposition effective section 8 of the optical fiber preform body is connected with the conical head 7 of the optical fiber preform body.
The blowtorch comprises a first blowtorch 1, a second blowtorch 2 and a third blowtorch 3, wherein the first blowtorch 1 is positioned above the second blowtorch 2, the second blowtorch 2 is positioned above the third blowtorch 3, the first blowtorch 1, the second blowtorch 2 and the third blowtorch 3 are all arranged in the same vertical plane, the baking lamp 4 is not arranged in the vertical plane and is arranged above or below the conical head 7 of the optical fiber perform rod along the rotating direction of the optical fiber perform rod 12, and the vertical plane is parallel to the rotating central shaft 11 of the loose body of the optical fiber perform rod; the vertical positions of the first blowlamp 1, the second blowlamp 2, the third blowlamp 3 and the baking lamp 4 satisfy the following relational expressions: (a-b-c) is not less than 0 (c-d), wherein, a is the height of this optical fiber perform bottom of this deposition point distance of this first blowtorch 1, b is the height of this optical fiber perform bottom of the deposition point distance of second blowtorch 2, and c is the height of this optical fiber perform bottom of the deposition point distance of third blowtorch 3, and d is the height of this optical fiber perform bottom of burning point distance of roast lamp 4, roast lamp horizontal position is the vertical axis that first blowtorch 1, second blowtorch 2 and third blowtorch 3 formed and follows the clockwise rotation angle theta of rotation center axis, and theta angle satisfies 0 and not more than 60 theta.
When in production, the controller 6 controls the optical fiber perform driving component 10 to drive the optical fiber perform 12 to do reciprocating circular motion or rotary motion along the axial lead thereof, the controller 6 controls the baking lamp driving component 9 to drive the baking lamp 4 and the optical fiber perform 12 to synchronously move, the deposition point temperature monitor of the blowtorch records the temperature signals of the deposition point of the first blowtorch, the deposition point of the second blowtorch and the deposition point of the third blowtorch every 10-20 minutes, and the data processor collects the temperature signals of the deposition point of the first blowtorchThe processor 5 detects the signals, processes the signals and calculates the average value of the burning point position temperature of the blowtorch
The temperature monitor for synchronously baking the burning points of the lamps every 10-20 minutes records temperature signals of the burning points of the first baking lamp 41 and the second baking lamp 42, the processor 5 collects the temperature signals of the burning points of the first baking lamp 41 and the second baking lamp 42, the processor 5 detects the signals, processes the signals and calculates the average value of the temperatures of the burning points of the baking lamps 4
The processor 5 then passes
And
calculating a difference value to obtain an actual heat deviation delta T between a conical head 7 of the optical fiber preform and a deposition effective section 8 of the optical fiber preform, presetting a delta T threshold value (see table 1) of the heat deviation between the conical head 7 of the optical fiber preform and the deposition effective section 8 of the optical fiber preform on a processor 5, finally determining a value of a correction coefficient m (see table 1) by the processor 5 according to the range comparison between the actual delta T deviation and the preset delta T deviation threshold value, transmitting a combustion gas flow v data signal after correction and adjustment through the correction coefficient m to a controller 6 by the processor 5, controlling the actual flow of burning gas of a baking lamp to be equal to the combustion gas flow v after correction and adjustment by the controller 6 according to the received corrected and adjusted combustion gas flow v data, so as to reduce the heat deviation between the conical head 7 of the optical fiber preform and the deposition effective section 8 of the optical fiber preform, effectively reducing the cracking probability of the cone head of the optical fiber preform rod in the deposition process and improving the product quality.
And testing and recording the deposition temperature of the blast lamp and the temperature of the burning point of the baking lamp every 10-20 min, namely, after a period of time, correcting and compensating the previous recording and testing once, so that the density control of the cone head of the optical fiber preform and the deposition effective section position of the optical fiber preform in the deposition process is facilitated.
TABLE 1 deviation Δ T threshold and its corresponding correction coefficient m
| ΔT/℃ | m |
| ΔT＜-100 | 1.05 |
| -100≤ΔT＜-50 | 1.03 |
| -50≤ΔT＜10 | 1.01 |
| 10≤ΔT＜50 | 1 |
| 50≤ΔT＜100 | 0.99 |
| 100≤ΔT＜150 | 0.97 |
| ΔT＞150 | 0.95 |
Referring to FIG. 1, a structure for preventing the taper head of an optical fiber preform from cracking, a flow v of combustion gas of a baking lamp0At 15L/min, during the process of producing the optical fiber preform, a time is selectedThe deposition point temperature monitor of the blowtorch records the deposition point temperature of the first blowtorch, the deposition point temperature of the second blowtorch and the deposition point temperature of the third blowtorch as shown in the following table 2, and the burning point temperature monitor of the burning lamp records the burning point temperatures of the first burning lamp and the second burning lamp as shown in the following table 2:
TABLE 2 temperatures at monitoring points
| Monitoring location | temperature/deg.C of monitoring point |
| Baking lamp 1 | 834 |
| |
854 |
| Blast lamp 1 | 920 |
| |
945 |
| |
931 |
Will be T in Table 21iAt 920 ℃ and T2iIs 945 ℃ and T3iSubstituting the temperature of 931 ℃ into the calculation formula
Calculating to obtain the average value of the burning point position temperature of the blowtorch in the effective deposition section of the optical fiber preform body
932 deg.C;
will be t in Table 21iAt 834 ℃ and t2iSubstituting into the calculation formula for 854 deg.C
Calculating to obtain the average value of the burning point position temperature of the conical head baking lamp of the optical fiber preform rod
844 ℃;
will be provided with
The average value of the burning point position temperature of the baking lamp is 844 DEG C
Substituting the average value of the temperature of the deposition point position of the blast lamp into the calculation formula
Calculating the actual deviation delta T of the heat of the deposition effective section of the cone head of the optical fiber preform body and the optical fiber preform body to be-88 ℃;
determining that the value of the correction coefficient m is 1.03 (see table 2) according to the range comparison between the actual delta T deviation and the preset delta T deviation threshold;
the value of the correction coefficient m is 1.03 and the current flow v of the burning gas of the baking lamp0Substituting the formula v ═ v for 15L/min0m, calculating to obtain corrected and adjusted combustion gas flow v of 15.45L/min, determining the flow of the combustion gas of the baking lamps at the next stage of the first baking lamp and the second baking lamp to be 15.45L/min, and repeating the steps until the deposition of the optical fiber preform is finished.
The invention provides a method for preventing an optical fiber preform rod cone head from cracking, which comprises the following steps:
installing a baking lamp and a blast lamp: installing a plurality of blowlamps in the same vertical plane, wherein the vertical plane is parallel to the rotating central shaft 11 of the optical fiber perform, installing a plurality of baking lamps 4 in the vertical plane which is not in the same vertical plane with the blowlamps, arranging a plurality of baking lamps 4 on the vertical shaft of the baking lamps and connecting the baking lamps with the vertical shaft, and arranging the baking lamps 4 and the conical head 7 of the optical fiber perform in an inclined opposite manner;
installing a temperature monitor: respectively installing temperature monitors at the burning point of the baking lamp 4 and the deposition point of the blowtorch, wherein the temperature monitors are used for recording the temperatures of the burning point of the baking lamp and the deposition point of the blowtorch in real time when the rotating central shaft 11 of the preform loose body rotates;
calculating the average value of the temperatures of the burning point positions of the baking lamps and the average value of the temperatures of the deposition point positions of the blowtorch: recording the temperatures of the burning point of the burning lamp and the deposition point position of the blowtorch in real time according to a temperature monitor, and respectively calculating the average value of the temperatures of the burning point position of the burning lamp and the deposition point position of the blowtorch;
determining a correction coefficient m: determining a correction coefficient m according to the difference value of the average value of the temperatures of the burning point positions of the baking lamps and the average value of the temperatures of the deposition point positions of the blowtorch;
the flow of the combustion gas is corrected and adjusted through the correction coefficient m so as to reduce the heat deviation between the conical head of the optical fiber preform body and the deposition effective section of the optical fiber preform body.
The deposition effective section of the optical fiber perform rod is provided with 3 torch deposition point temperature monitors in a first torch 1, a second torch 2 and a third torch 3, the three torch deposition point temperature monitors are uniformly distributed at the deposition effective section of the optical fiber perform rod, the torch deposition point temperature monitors are used for recording the burning point position temperature of the torches and calculating the average value of the burning point position temperature of the torches
Calculated by the following formula:
wherein，T1i、T2iAnd T3iThe deposition point temperature monitors of the 3 torches record the temperatures of the deposition points of the optical fiber preform corresponding to the first torch, the second torch, and the third torch, respectively.
2 burning point temperature monitors are arranged at the conical head 7 of the optical fiber preform rod, the 2 burning point temperature monitors are used for recording the temperatures of the positions near the burning points of the two burning lamps and calculating the average value of the temperatures of the burning point positions of the two burning lamps
Calculated by the following formula:
wherein, t1iAnd t2iThe temperature of the positions near the burning points of the 2 baking lamps is recorded for the 2 burning point temperature monitors respectively.
The actual heat deviation delta T of the conical head 7 of the optical fiber preform body and the effective deposition section 8 of the optical fiber preform body is calculated by the following calculation formula:
wherein is
Average value of the temperatures of the burning point positions of a plurality of baking lamps,
the average value of the temperatures of the positions of the deposition points of a plurality of torches is obtained.
Determining the value of a correction coefficient m according to the comparison of the actual delta T deviation and the preset delta T deviation threshold, correcting and adjusting the flow of the combustion gas through the value of the correction coefficient m, and calculating the corrected and adjusted flow v of the combustion gas through the following calculation formula:
v＝v0m
in the formula: v. of0Indicating the flow of the combustion gas of the current baking lamp; m represents a correction coefficient.
According to the formula Q Vq svtq, Q represents the heat released by complete combustion of the combustion gas; s represents the sectional area of the position of the torch; v represents the flow rate of combustion gas; t represents the time through the cross section; q represents a calorific value of the combustion gas; the invention can reduce the position difference of the baking lamp and the blast lamp by adjusting the input heat, namely, the problem of overlarge temperature deviation between the conical head and the deposition effective section in the deposition process of the optical fiber preform can be solved by adjusting the flow of combustion gas of the baking lamp, the cracking probability of the conical head of the optical fiber preform in the deposition process is effectively reduced, and the product quality is improved.
The present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method for preventing the taper head of an optical fiber preform from cracking as described in any one of the above.
The invention provides a structure, a method and a storage medium for preventing a conical head of an optical fiber preform from cracking, solves the problem of overlarge temperature deviation between the conical head and a deposition effective section in the deposition process of the optical fiber preform, effectively reduces the cracking probability of the conical head of the optical fiber preform in the deposition process, and improves the product quality.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all modifications and equivalents falling within the scope of the appended claims. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A method for preventing the cone head of an optical fiber preform from cracking is characterized by comprising the following steps:
installing a baking lamp and a blast lamp: installing a plurality of blowlamps in the same vertical plane, wherein the vertical plane is parallel to the rotating central shaft of the optical fiber perform rod, installing a plurality of baking lamps in the vertical plane which is not in the same vertical plane with the blowlamps, arranging the baking lamps on the vertical shaft of the baking lamps and connecting the baking lamps with the vertical shaft of the baking lamps, and arranging the baking lamps and the conical head of the optical fiber perform rod in an inclined opposite manner;
installing a temperature monitor: respectively installing temperature monitors at the burning point of the baking lamp and the deposition point of the blowtorch, wherein the temperature monitors are used for recording the temperatures of the burning point of the baking lamp and the deposition point of the blowtorch in real time when the rotating central shaft of the preform loose body rotates;
calculating the average value of the temperatures of the burning point positions of the baking lamps and the average value of the temperatures of the deposition point positions of the blowtorch: recording the temperatures of the burning point of the burning lamp and the deposition point position of the blowtorch in real time according to a temperature monitor, and respectively calculating the average value of the temperatures of the burning point position of the burning lamp and the deposition point position of the blowtorch;
determining a correction coefficient m: determining a correction coefficient m according to the difference value of the average value of the temperatures of the burning point positions of the baking lamps and the average value of the temperatures of the deposition point positions of the blowtorch;
correcting and adjusting the flow of combustion gas: the flow of the combustion gas is corrected and adjusted through the correction coefficient m so as to reduce the heat deviation between the conical head of the optical fiber preform body and the deposition effective section of the optical fiber preform body.
2. The method of claim 1, wherein 3 torch deposition point temperature monitors are installed at the effective deposition section of the optical fiber preform by the first, second and third torchesThe three blowtorch deposition point temperature monitors are uniformly distributed at the deposition effective section position of the optical fiber perform, and are used for recording the burning point position temperature of the blowtorch and calculating the average value of the burning point position temperature of the blowtorch
The calculation is carried out by the following calculation formula:
wherein, T1i、T2iAnd T3iThe deposition point temperature monitors of the 3 torches record the temperatures of the deposition points of the optical fiber preform corresponding to the first torch, the second torch, and the third torch, respectively.
3. The method of claim 1, wherein 2 burning point temperature monitors are installed at the taper end of the optical fiber preform, the 2 burning point temperature monitors are used to record the temperatures of the two burning points, and the average of the temperatures of the burning point positions of the two burning points is calculated
The calculation is carried out by the following calculation formula:
wherein, t1iAnd t2iRespectively recording 2 burning points of the 2 burning lamps for the 2 burning lamp burning point temperature monitorsTemperature at a position near the burning point.
4. The method for preventing the taper head of an optical fiber preform from being cracked according to claim 3, wherein an actual deviation Δ T of heat quantity of the taper head of the optical fiber preform body from the deposition effective section of the optical fiber preform body is calculated based on the average value of the temperature of the burning point position of the burning lamp and the average value of the temperature of the deposition point position of the torch, and the actual deviation Δ T is calculated by the following calculation formula:
wherein
The average value of the temperatures of the burning point positions of a plurality of baking lamps,
the average value of the temperatures of the positions of the deposition points of a plurality of torches is obtained.
5. The method for preventing the optical fiber preform rod from cracking according to claim 4, wherein a value of a correction coefficient m is determined according to the range comparison between the actual Δ T deviation and the preset Δ T deviation threshold, the combustion gas flow is corrected and adjusted according to the value of the correction coefficient m, and the corrected and adjusted combustion gas flow v is calculated according to the following calculation formula:
v＝v0m
in the formula: v. of0Indicating the flow of the combustion gas of the current baking lamp; m represents a correction coefficient.
6. A computer-readable storage medium on which a computer program is stored, wherein the program, when executed by a processor, implements the method for preventing the cone head of an optical fiber preform from being cracked according to any one of claims 1 to 5.
7. AA structure for preventing the conical head of an optical fiber preform from cracking is characterized by comprising: a plurality of baking lamps and blowlamps, wherein the baking lamps are used for adjusting the density of the conical heads of the optical fiber preform rods, and the blowlamps are used for depositing SiO on the deposition effective section of the optical fiber preform rods2The device comprises dust, a burning point temperature monitor of the baking lamp is arranged at the position of a burning point of the baking lamp, a deposition point temperature monitor of the blowtorch is arranged at the position of a deposition point of the blowtorch, the temperature monitor of the burning point of the baking lamp and the temperature monitor of the deposition point of the blowtorch are electrically connected with a processor, the processor is electrically connected with a controller, and the controller is used for controlling the flow of burning gas of the baking lamp.
8. The structure for preventing the conical head of an optical fiber preform from being cracked according to claim 7, wherein the torches include a first torch, a second torch, and a third torch, the first torch being positioned above the second torch, the second torch being positioned above the third torch, the first torch, the second torch, and the third torch being installed in a same vertical plane, the bake lamp not being installed in the vertical plane and being installed at an angle above or below the conical head of the optical fiber preform in a rotation direction of the optical fiber preform; the vertical positions of the first blowlamp, the second blowlamp, the third blowlamp and the baking lamp satisfy the following relational expressions: (a-b-c) is not less than 0 (c-d), wherein, a is the height of the deposition point distance this optical fiber perform bottom of this first blowtorch, b is the height of the deposition point distance this optical fiber perform bottom of second blowtorch, c is the height of the deposition point distance this optical fiber perform bottom of third blowtorch, d is the height of the burning point distance this optical fiber perform bottom of roast lamp, roast lamp horizontal position is the clockwise rotation angle theta of vertical axis along the center of rotation axle that first blowtorch, second blowtorch and third blowtorch formed, and angle theta satisfies 0 and not more than theta and not more than 60.
9. The structure for preventing the optical fiber preform taper head from being cracked as claimed in claim 7, comprising: the optical fiber perform drive assembly is connected with a rotating central shaft of the preform loose body, the rotating central shaft of the preform loose body penetrates through the optical fiber perform, the optical fiber perform drive assembly is electrically connected with the controller, and the controller controls the optical fiber perform drive assembly to drive the rotating central shaft of the preform loose body to rotate so as to drive the optical fiber perform to do reciprocating circular motion or rotating motion along the axial lead of the optical fiber perform.
10. The structure for preventing the optical fiber preform taper head from being cracked as claimed in claim 7, comprising: the lamp baking driving assembly is connected with the baking lamp, the lamp baking driving assembly is electrically connected with the controller, and the controller controls the lamp baking driving assembly to drive the baking lamp and the optical fiber preform to move synchronously.
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