CN214004432U - Control device for uniform density of multi-deposition blast lamps - Google Patents
Control device for uniform density of multi-deposition blast lamps Download PDFInfo
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- CN214004432U CN214004432U CN202022898278.9U CN202022898278U CN214004432U CN 214004432 U CN214004432 U CN 214004432U CN 202022898278 U CN202022898278 U CN 202022898278U CN 214004432 U CN214004432 U CN 214004432U
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Abstract
The utility model discloses a controlling means that many deposits blowtorch density is even, the adjacent both sides of target stick set up guide rail and a plurality of vertical blowtorch of arranging respectively, infrared thermometer is fixed in on the stable platform and along the vertical reciprocating motion of guide rail, infrared thermometer and controller are connected and are reconnected the computer, infrared thermometer carries out periodic temperature test to each stage surface of target stick, the organosilicon and the fuel combustion reaction output silica powder of blowtorch, deposit on the target stick through thermophoresis, form loose body, the blowtorch is connected with the fuel flowmeter, the controller passes through the actual output fuel volume on the fuel flowmeter adjustment corresponds the blowtorch. The utility model provides an even controlling means of many deposits blowtorch density utilizes infrared temperature measurement to monitor target bar surface temperature, regulates and control fuel demand flow, makes the loose body surface temperature homogeneous that obtains to the preparation density is even and the dehydration performance and the decay characteristic of stress distribution are even, the optical fiber perform that the product obtained the improvement.
Description
Technical Field
The utility model belongs to the technical field of optical fiber perform target bar preparation, concretely relates to control device that many deposits blowtorch density is even.
Background
In the prior art for manufacturing an optical fiber preform, a two-step total synthesis process is mainly adopted: preparing an optical fiber preform core rod by VAD (vapor axial deposition), taking the core rod as a target rod, and depositing an outer cladding layer by OVD (outside vapor deposition). For the preparation of the outer cladding, organic silicon is gradually used to replace the conventional SiCl4Is a silicon source, and is an environment-friendly raw material because the organosilicon reaction process does not contain pollutants harmful to the environment, such as halogen and the like. Production of large quantities of SiO by combustion of organosilicon during deposition2And (2) depositing the dust particles on the target rod layer by layer under the thermophoresis effect, obtaining a silicon dioxide dust precursor (or called loose body) after the deposition is finished, and sintering and vitrifying the precursor to obtain the optical fiber preform. In the deposition process, if the powder particle size and distribution of the loose body are more uniform, the optical fiber perform rod with better quality can be obtained.
However, during the production process, combustion of the fuel gas and the silicon source releases a large amount of heat, and in particular, the organic silicon emits more heat. At present, a plurality of blowlamps are commonly adopted for deposition, flowmeters with the same specification are used for metering raw materials and fuel gas, but the differences existing between the flowmeters and the differences existing in the machining precision of pipelines and the blowlamps cannot ensure the consistency between the blowlamps, so that the uniformity of products is reduced. Secondly, the principle of vapor deposition of bulk is essentially deposition by means of the thermophoretic effect (gas-solid or gas-liquid dispersions consisting of solid or liquid particles suspended in a gaseous medium are collectively called aerosols; when the aerosols are in a non-isothermal field, the microparticles suspended in the gaseous mediumThe particles are moved by a force directed against the temperature gradient, a phenomenon known as thermophoresis. In the ideal gas containing multiple atoms, the thermophoretic velocity is proportional to the temperature gradient DeltaT and independent of the particle size for spherical particles with a particle size smaller than the mean free path of the gas molecules, i.e. the particle size
). According to the heat convection principle, the temperature rises along with the burning in the deposition process, the bulk is enlarged, the heat upwells, the temperature deviation about appearing, the difference in this kind of temperature causes different position thermophoresis speed difference (deposition rate is different promptly), need regulate and control the homogeneity in order to guarantee the loose external diameter to gas, raw materials in the deposition process, and then can lead to there being very big difference in inside substantial density under the same circumstances of loose external diameter. The temperature deviation on the target rod is more remarkable under the superposition of heat released by a plurality of torches. Figure 1 shows the temperature of the rod at various points in the bulk at a stage. Because the loose body is a porous structure, the density is generally 0.2-0.8 g/cm3During the oxidation sintering, densification and vitrification are needed; if the density is not uniform, the outer diameter of the optical rod is not uniform, and the small density area corresponds to a larger gap, so that the optical rod is thinner after vitrification. In addition, lattice defects are caused even by different stress among particles, bubbles in a loose body in a low-density area are easy to discharge, the discharge time of bubbles in a high-density area is relatively long, the conditions of incomplete air hole elimination, poor transparentization and the like in a high-density area can be caused, and the drawing quality of the optical rod can be influenced. FIG. 2 shows the difference between the curves of the outer diameter of the loose body and the outer diameter of the sintered optical rod. The uniformity of the final outer diameter of the loose body is ensured mainly through the control of a diameter measuring system, but the uniformity of the internal structure of the loose body cannot be ensured.
In order to better control the quality of products, it is necessary to develop a method capable of monitoring and controlling the surface temperature of the loose body in the deposition process on line, so as to control the overall density uniformity of the loose body from beginning to end and obtain an optical fiber preform product with excellent quality.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem that exists among the prior art, the utility model aims to provide a control device that many deposits blowtorch density is even.
In order to realize the above purpose, reach above-mentioned technological effect, the utility model discloses a technical scheme be:
the utility model provides a controlling means that many deposits blowtorch density is even, including target bar, motor, infrared thermometer, guide rail, controller, computer, fuel flow meter and blowtorch, the target bar vertical layout is in the assigned position of deposition area, the both sides that the target bar is adjacent set up guide rail and a plurality of vertical blowtorch of arranging respectively, set up the infrared thermometer along the vertical reciprocating motion of guide rail on the guide rail, carry out periodic temperature test to the target bar surface through infrared thermometer, infrared thermometer is connected with the controller and is reconnected the computer, the organosilicon of blowtorch and the burning reaction of fuel produce silica powder, deposit on the target bar through thermophoresis, form the loose body of optical fiber perform, the controller is connected with fuel flow meter and is reconnected the blowtorch, the actual output fuel volume on the controller passes through fuel flow meter adjustment blowtorch.
Further, a plurality of blowtorch is arranged to the right side vertical equidistant of target rod, and every blowtorch all is connected to the controller with a fuel flowmeter again, and the controller chooses for use current PLC, singlechip etc. can.
Furthermore, a vertically-arranged guide rail is arranged on the right rear side of the target rod, a motor and a stabilizing platform are arranged on the guide rail, an infrared thermometer is arranged on the stabilizing platform, the motor is connected with the stabilizing platform horizontally arranged on the guide rail, and the stabilizing platform is driven by the motor to drive the infrared thermometer on the stabilizing platform to reciprocate vertically along the guide rail, so that the periodic temperature detection is conveniently carried out on the surface of the target rod.
Further, the horizontal distance between the infrared thermometer and the target rod is 50-100 cm.
Further, still include anchor clamps, rotating electrical machines and elevator motor, the target rod is vertically fastened in the assigned position in deposition area through the clamping action of anchor clamps, and rotating electrical machines and elevator motor are connected with the target rod respectively and control the target rod respectively and carry out axial rotation and vertical elevating movement.
Further, anchor clamps include anchor clamps and lower anchor clamps, go up anchor clamps and lower anchor clamps and press from both sides tight target rod top and bottom respectively and make the vertical assigned position in sedimentation area of target rod again, upper and lower anchor clamps adopt current products such as buckle can, only need ensure to clip target rod and vertical firm position.
Further, rotating electrical machines and elevator motor set up respectively in the assigned position of deposition area, and rotating electrical machines's rotation axis and target bar coaxial coupling carry out 360 rotary motion of axial through the rotating electrical machines control target bar, and elevator motor sets up on the lifting guide of the assigned position of deposition area, and elevator motor main shaft and target bar coaxial coupling, elevator motor follow the vertical elevating movement of lifting guide, drive the synchronous lift of target bar, realize even deposit.
The utility model discloses a control method that many deposits blowtorch density is even utilizes infrared temperature measurement control loose body preparation in-process each stage temperature equilibrium, density even of optical fiber perform, including following step:
during deposition production, silicon dioxide powder is produced through combustion reaction of organic silicon and fuel of a blast lamp and is deposited on a target rod through thermophoresis, an infrared thermometer vertically reciprocates along a guide rail on the front side and the rear side of the target rod corresponding to the blast lamp, periodic temperature tests are conducted on the surface of each stage of the target rod, the real-time temperature of the surface of the target rod corresponding to each blast lamp position is recorded and is uploaded to a controller for analysis processing, the integral average temperature value of the surface of the target rod at the moment and the temperature deviation of the integral average temperature value and each measuring point are calculated, the fuel demand flow of each blast lamp is calculated and fed back to a computer host, the controller adjusts the actual fuel flow of the corresponding blast lamp through a fuel flow meter to increase or decrease, and infrared temperature measurement and fuel heat adjustment are conducted on the target rod every other temperature test cycle until deposition is finished.
Further, the infrared thermometer is aligned to the targetPeriodic temperature test is carried out on the surface of each stage of the rod, and the real-time firework temperature T of the surface of the target rod corresponding to each blowtorch position is recorded1、T2、T3……TnAnd uploading the temperature data to a controller for analysis and processing, and respectively calculating the integral average temperature value of the surface of the target rod at the moment and the temperature deviation between the integral average temperature value and each measuring point through a formula (1) and a formula (2):
Taverage＝(T1+T2+……Tn) Formula/n (1)
△Tn＝Tn-TAverageFormula (2)
Wherein, TnMeasured temperature, T, for the nth torch corresponding to the position of the target barAverageIs the integral average temperature value of the surface of the target rod at a certain time, and Delta Tn is the nth temperature detection point and T at a certain timeAverageTemperature deviation of (2);
if delta Tn is greater than 0, the surface temperature of the corresponding target rod at the position is relatively high, the controller controls the fuel flow of the blowtorch at the position to be reduced, if delta Tn is less than 0, the surface temperature of the target rod at the position is relatively low, and the controller controls the fuel flow of the blowtorch at the position to be increased.
Further, the fuel demand flow rate is determined by equation (3):
C＝m×C0formula (3)
Wherein C is the adjusted fuel demand flow, C0M is the flow conversion coefficient corresponding to different delta Tn for the initial air flow, and when the delta Tn is 0, m is 0, 0<Δ Tn, 0<m<1，△Tn<At 0, 1<m<1.2。
Further, the moving speed of the infrared thermometer is 1-5 m/s, and the temperature testing cycle period of the infrared thermometer is 10-30 min.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a control device for controlling multiple deposition blowtorch density to be uniform, which comprises a target rod, a motor, an infrared thermometer, a guide rail, a controller, a computer, a fuel flow meter and blowtorches, wherein the target rod is vertically arranged at the appointed position of a deposition area, the guide rail and a plurality of blowtorches which are vertically arranged are respectively arranged at two adjacent sides of the target rod, the infrared thermometer which vertically reciprocates along the guide rail is arranged on the guide rail, the surface of the target rod is periodically tested for temperature by an infrared thermometer, the infrared thermometer is connected with a controller and then connected with a computer host, the organosilicon of the blowtorch and fuel are reacted by combustion to produce silicon dioxide powder, the method comprises the steps of depositing on a target rod through thermophoresis to form an optical fiber preform loose body, connecting a controller with a fuel flow meter, connecting a blowtorch, connecting one fuel flow meter with one blowtorch, and adjusting the actual output fuel quantity on the corresponding blowtorch through the fuel flow meter by the controller. The utility model provides an even controlling means of many deposits blowtorch density utilizes infrared temperature measurement to carry out real-time supervision to whole optical fiber perform loose body or precursor surface bulk temperature in the deposition process to regulate and control fuel demand flow according to the demand, make loose body each stage surface temperature all violently, thereby prepare that density is even, the stress distribution is even, the dehydration performance and the decay characteristic of product obtain the optical fiber perform that improves, optical parameter is better, the performance homogeneous.
Drawings
FIG. 1 is a graph of the temperature profile of a prior art rod at various points in a bulk body at a stage;
FIG. 2 is a graph showing the difference between curves of the outer diameter of the porous body and the outer diameter of the sintered optical rod in the prior art;
FIG. 3 is a schematic structural view of the present invention;
wherein, 1, a motor; 2-an infrared thermometer; 3-a stabilization platform; 4-a guide rail; 5-a target rod; 6-a controller; 7-a computer host; 8-a fuel flow meter; 9-a blast lamp; 10-lower clamp; 11-upper clamp; 12-a rotating electrical machine; 13-a lifting motor; 14-lifting guide rails.
Detailed Description
The embodiments of the present invention are described in detail below to make the advantages and features of the present invention easier to understand by those skilled in the art, thereby making more clear and definite definitions of the protection scope of the present invention.
As shown in figure 3, the control device for the density uniformity of the multi-deposition blast lamps comprises a motor 1, an infrared thermometer 2 and a stabilizing plateThe device comprises a table 3, guide rails 4, a target rod 5, a controller 6, a computer host 7, fuel flow meters 8, blowlamps 9, clamps, a rotating motor 12, a lifting motor 13 and a lifting guide rail 14, wherein the blowlamps 9 are arranged on one side (right side) of the target rod 5, the blowlamps 9 are provided with a plurality of blowlamps and are vertically arranged at equal intervals from top to bottom, one blowlamp 9 is correspondingly connected with one fuel flow meter 8, different blowlamps 9 can realize different flow regulation and control, when in production, silicon dioxide powder is produced by combustion reaction of organic silicon and fuel of the blowlamps 9 and is deposited on the target rod 5 through thermophoresis, the other side (right back side) adjacent to the target rod 5 is provided with one guide rail 4 which is vertically arranged, a stabilizing platform 3 which vertically reciprocates along the guide rails 4 is horizontally arranged on the guide rail 4, the motor 1 is connected with the stabilizing platform 3, the infrared thermometer 2 is fixed on the working platform 3, the working platform 3 is driven by the motor 1 to drive the infrared thermometer 2 on the working platform 3 to vertically reciprocate along the guide rails 4, can carry out periodic temperature detection to 5 surperficial points of target rod when infrared thermometer 2 vertical reciprocating motion, the infrared temperature measurement point position on the target rod 5 and the rate of motion of infrared thermometer 2 are all controlled by motor 1, and correspond with target rod 5 and blowtorch 9, every infrared temperature measurement point position corresponds with a blowtorch 9 position respectively, infrared thermometer 2 is connected with controller 6 input, controller 6 output is connected with computer 7 and all fuel flowmeter 8, infrared thermometer 2 transmits the infrared temperature measurement data of each infrared temperature measurement point position of real-time detection to controller 6, controller 6 receives and carries out data processing and analysis, acquire temperature T everywhere on target rod 5 surfacenOverall temperature level and temperature mean value TAverageObtaining the infrared temperature measurement data and the temperature average value T of each infrared temperature measurement point positionAverageThe temperature difference delta Tn between the target rods is compared with the corresponding blowtorch 9, the fuel demand flow C is calculated by PID and fed back to the computer host 7, the actual output fuel flow of the corresponding blowtorch 9 is adjusted by the controller 6 through the fuel flow Meter (MFC)8, so that the flow regulation of each blowtorch 9 is realized, the infrared temperature measurement and the fuel quantity adjustment are carried out on the target rods 5 at certain intervals until the deposition is finished, and the surface temperature of the target rods 5 is always balanced and the deposition density is uniform.
The anchor clamps include anchor clamps 10 and last anchor clamps 11 down, through anchor clamps 10 and last anchor clamps 11 respectively with target 5 bottom and top clamp tightly and make target 5 vertical place in the assigned position in deposition area, rotating electrical machines 12 and elevator motor 13 set up respectively in the assigned position in deposition area, the rotation axis of rotating electrical machines 12 is connected and both axis is on same straight line with target 5, it is rotatory 360 to drive target 5 axial through rotating electrical machines 12, elevator motor 13 is connected and control target 5 and carry out vertical elevating movement with target 5, elevator motor 13 sets up on elevator guide rail 14 of the assigned position in deposition area, elevator motor 13 main shaft and target 5 coaxial coupling, elevator motor 13 is along elevator guide rail 14 vertical elevating movement, target 5 synchronous elevating movement, realize even deposit.
The vertical moving speed of the infrared thermometer 2 is represented by v, and the value range of v is 1-5 m/s, preferably 2-3 m/s; the temperature testing cycle period of the infrared thermometer 2 is 10-30 min; the transverse distance between the infrared thermometer 2 and the target rod 5 is 50-100 cm.
A control method for the density uniformity of a multi-deposition blast burner utilizes infrared temperature measurement to control the temperature balance and the density uniformity of each stage in the preparation process of an optical fiber preform loose body; during deposition production, the infrared thermometer 2 vertically reciprocates along the guide rail 4 at a certain moving speed at the front side and the rear side of the target rod 5 corresponding to the blowlamps 9, tests the temperature of the surface of the target rod 5 (or a loose body) at each stage, and records the real-time temperature T of the surface of the target rod 5 corresponding to the position of each blowlamp 91、T2、T3……Tn(ii) a Calculating the integral average temperature value T of the surface of the target rod 5 at the moment by the formula (1)Average：
TAverage＝(T1+T2+……Tn)/n (1)
Calculating each measuring point and T by using the formula (2)AverageTemperature deviation DeltaT of1、△T2、△T3……△Tn：
△Tn＝Tn-TAverage (2)
If Δ Tn >0, it indicates that the surface temperature of the corresponding target rod 5 is relatively high, the controller 6 controls the flow rate of the fuel of the torch 9 at that position to be reduced to a certain extent, and if Δ Tn <0, it indicates that the temperature of the target rod 5 at that position is relatively low, and the controller 6 controls the flow rate of the fuel of the torch 9 at that position to be increased to a certain extent.
The PID lift gas flow rate is calculated by equation (3):
C＝m×C0 (3)
when Δ Tn is 0, m is 0, 0< Δ Tn, 0< m <1, and Δ Tn <0, 1< m < 1.2.
Wherein n is the number of torches, TnThe measured temperature, T, of the nth torch 9 corresponding to the position of the target 5AverageIs the integral average temperature value of the surface of the target rod 5 at a certain time, and Delta Tn is the nth temperature detection point and T at a certain timeAverageTemperature deviation of (2); c is the PID adjusted fuel demand flow, C0And m is the flow conversion coefficient corresponding to different delta Tn obtained according to the experimental result.
Example 1
As shown in figure 3, a control device for controlling the density uniformity of a multi-deposition blowtorch comprises a motor 1, an infrared thermometer 2, a stable platform 3, a guide rail 4, a target rod 5, a controller 6, a computer host 7, a fuel flowmeter 8, a blowtorch 9, a lower clamp 10, an upper clamp 11, a rotating motor 12, a lifting motor 13 and a lifting guide rail 14, wherein the bottom and the top of the target rod 5 are respectively clamped and vertically placed at the designated position of a deposition area through the lower clamp 10 and the upper clamp 11, the lower clamp 10 and the upper clamp 11 can be directly sleeved on the surface of the target rod 5 and fastened at the vertical position, the existing product is adopted, the rotating shaft of the rotating motor 12 is connected with the target rod 5, the central axes of the rotating shaft and the target rod 5 are on the same straight line, the target rod 5 is driven to rotate through the rotating motor 12, the lifting motor 13 is arranged on the lifting guide rail 14 at the designated position of the deposition area, the main shaft of the lifting motor 13 is coaxially connected with the target rod 5, lifting motor 13 is along 14 vertical elevating movement of lift rail, 5 synchronous elevating movement of target stick, realize even deposit, adopt prior art can, set up blowtorch 9 on the positive right side of target stick 5, blowtorch 9 is equipped with four and from top to bottom vertical equidistant arranging, a fuel flow meter 8 of corresponding connection of blowtorch 9, different flow regulation and control can be realized to different blowtorches 9, when carrying out production, the organosilicon of blowtorch 9 and the reaction output silica powder of fuel combustion, lead toThe thermophoresis is deposited on a target rod 5, a guide rail 4 which is vertically arranged is arranged at the front rear side of the target rod 5, a stable platform 3 which vertically reciprocates along the guide rail 4 is horizontally arranged on the guide rail 4, a motor 1 is connected with the stable platform 3, an infrared thermometer 2 is fixed on the working platform 3, the working platform 3 is driven by the motor 1 to drive the infrared thermometer 2 thereon to vertically reciprocate along the guide rail 4, the periodic temperature detection of the flame temperature of each point can be carried out on the target rod 5 when the infrared thermometer 2 vertically reciprocates, the position of an infrared temperature measuring point on the target rod 5 and the motion rate of the infrared thermometer 2 are controlled by the motor 1 and correspond to the space between the target rod 5 and the blast lamps 9, each position of the infrared temperature measuring point corresponds to the position of one blast lamp 9, the temperature at the position of the infrared temperature measuring point is matched with the temperature sprayed by the corresponding blast lamp 9, the infrared thermometer 2 is connected with the input end of a controller 6, the output end of the controller 6 is connected with a computer host 7 and all fuel flowmeters 8, the infrared thermometer 2 transmits infrared temperature measurement data of each infrared temperature measurement point position detected in real time to the controller 6, and the controller 6 receives the data and processes and analyzes the data to obtain the temperature T of each part on the surface of the target rod 5nOverall temperature level and temperature mean value TAverageObtaining the infrared temperature measurement data and the temperature average value T of each infrared temperature measurement point positionAverageThe temperature difference value delta Tn is compared with the blowtorch 9 at the corresponding position, the fuel demand flow C is calculated by using PID and fed back to the computer host 7, the controller 6 adjusts the actual output fuel quantity of the blowtorch 9 corresponding to the controller through the fuel flowmeter 8, thereby realizing the flow regulation of each blowtorch 9, and the infrared temperature measurement and the fuel quantity adjustment are carried out on the target rod 5 at certain intervals until the deposition is finished.
The infrared thermometer 2 moves from top to bottom at a speed of 2m/s on the guide rail 4 under the driving action of the motor 1, records infrared temperature measurement data of each infrared temperature measurement point position corresponding to the four blowlamps 9 respectively, transmits the infrared temperature measurement data to the controller 6 for data analysis and processing, the temperature test cycle period of the infrared thermometer 2 is 15min, the transverse (horizontal) distance between the infrared thermometer 2 and the target rod 5 is 80cm, and flow conversion coefficients m corresponding to different temperature difference values delta Tn are obtained through PID according to experiments, as shown in Table 1.
TABLE 1
The infrared thermometer 2 moves back and forth along the guide rail 4 vertically to test the temperature of the surface of the target rod 5 at each stage and record the real-time temperature T of the surface of the target rod 5 corresponding to the position of each blowtorch 91、T2、T3……Tn(ii) a Calculating the integral average temperature value T of the surface of the target rod 5 at the moment by the formula (1)Average：
TAverage＝(T1+T2+……Tn)/n (1)
Calculating each measuring point and T by using the formula (2)AverageTemperature deviation DeltaT of1、△T2、△T3……：
△Tn＝Tn-TAverage (2)
If Δ Tn >0, it indicates that the surface temperature of the corresponding target rod 5 is relatively high, the controller 6 controls the flow rate of the fuel of the torch 9 at that position to be reduced to a certain extent, and if Δ Tn <0, it indicates that the temperature of the target rod 5 at that position is relatively low, and the controller 6 controls the flow rate of the fuel of the torch 9 at that position to be increased to a certain extent.
The PID lift gas flow rate is calculated by equation (3):
C＝m×C0 (3)
wherein n is the number of torches, TnThe measured temperature, T, of the nth torch 9 corresponding to the position of the target 5AverageIs the integral average temperature value of the surface of the target rod 5 at a certain time, and Delta Tn is the nth temperature detection point and T at a certain timeAverageTemperature deviation of (2); c is the PID adjusted fuel demand flow, C0M is the flow conversion coefficient corresponding to different DeltaTn obtained according to the experimental result
The required fuel flow C is calculated according to the formula (3), the required fuel flow C is fed back to the computer host 7, the fuel flow which is sprayed out by the corresponding blowtorch 9 is adjusted by controlling the fuel flow meter 8 through the controller 6, and the adjustment is carried out once every 15min until the deposition is finished.
The utility model discloses the part of not specifically describing adopt prior art or current product can, do not do here and describe repeatedly.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (8)
1. The control device is characterized by comprising a target rod, a motor, an infrared thermometer, a guide rail, a controller, a computer host, a fuel flow meter and a blast lamp, wherein the target rod is vertically arranged at a designated position of a deposition area, the guide rail and a plurality of blast lamps which are vertically arranged are respectively arranged on two adjacent sides of the target rod, the infrared thermometer which vertically reciprocates along the guide rail is arranged on the guide rail, the surface of the target rod is subjected to periodic temperature test through the infrared thermometer, the infrared thermometer is connected with the controller and then connected with the computer host, silicon dioxide powder is produced through combustion reaction of organic silicon and the fuel of the blast lamp, the silicon dioxide powder is deposited on the target rod through thermophoresis to form an optical fiber preform loose body, the controller is connected with the fuel flow meter and then connected with the blast lamp, and the controller adjusts the actual output fuel quantity on the blast lamp through the fuel flow meter.
2. The control device of claim 1, wherein a plurality of torches are vertically arranged at equal intervals right from the target rod, and each torch is connected to a fuel flow meter and then connected to the controller.
3. The device according to claim 1, wherein a vertically disposed guide rail is disposed right behind the target rod, the guide rail is provided with a motor and a stabilizing platform, the stabilizing platform is provided with an infrared thermometer, the motor is connected with the stabilizing platform horizontally disposed on the guide rail, and the stabilizing platform is driven by the motor to drive the infrared thermometer thereon to reciprocate vertically along the guide rail.
4. The apparatus according to claim 1, wherein the horizontal distance between the infrared thermometer and the target rod is 50-100 cm.
5. The apparatus of claim 1, further comprising a clamp, a rotating motor and a lifting motor, wherein the target rod is vertically fastened to a designated position of the deposition area by a clamping action of the clamp, and the rotating motor and the lifting motor are respectively connected to the target rod and respectively control the target rod to perform axial rotation and vertical lifting motion.
6. The apparatus of claim 5, wherein the clamps comprise upper and lower clamps for clamping the top and bottom of the target rod and vertically fastening the target rod at a designated position in the deposition region.
7. The device as claimed in claim 5, wherein the rotating motor and the elevating motor are respectively disposed at a designated position of the deposition region, the rotating shaft of the rotating motor is coaxially connected to the target rod, the rotating motor controls the target rod to perform an axial 360 ° rotation, the elevating motor is disposed on the elevating guide rail at the designated position of the deposition region, the spindle of the elevating motor is coaxially connected to the target rod, and the elevating motor moves vertically along the elevating guide rail to drive the target rod to synchronously ascend and descend, thereby achieving uniform deposition.
8. The device for controlling density uniformity of a multi-deposition burner according to claim 1, wherein the moving speed of the infrared thermometer is 1-5 m/s, and the temperature test cycle period of the infrared thermometer is 10-30 min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022898278.9U CN214004432U (en) | 2020-12-07 | 2020-12-07 | Control device for uniform density of multi-deposition blast lamps |
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| CN202022898278.9U CN214004432U (en) | 2020-12-07 | 2020-12-07 | Control device for uniform density of multi-deposition blast lamps |
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