CN203668232U - Sintering equipment of optical fiber preform - Google Patents
Sintering equipment of optical fiber preform Download PDFInfo
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- CN203668232U CN203668232U CN201320860820.9U CN201320860820U CN203668232U CN 203668232 U CN203668232 U CN 203668232U CN 201320860820 U CN201320860820 U CN 201320860820U CN 203668232 U CN203668232 U CN 203668232U
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Abstract
The utility model discloses sintering equipment of an optical fiber preform, and relates to the field of optical fiber preform sintering, in particular to equipment for closed-loop control in the sintering process by adjusting the temperature of a sintering furnace through a laser feedback control system in real time in the sintering process. The equipment comprises a tower body, a motor I, a chuck, a quartz hanging rod, a guide track, a gas sucking hole, a powder preform, a quartz chamber, a scrubbing tower, a furnace body, an insulating material, a heating body, a temperature control cabinet, a quartz furnace core tube, a laser emitter, a laser receiver, a Cl2 gas cabinet, an He gas cabinet, an N2 gas cabinet, a Cl2 mass flow controller, an He mass flow controller, an N2 mass flow controller, an MFC (Mass Flow Controller) flow control cabinet, a laser control cabinet, an air supply and discharge controller, a motor control cabinet, a motor II, a thermocouple, a screw rod and a control computer.
Description
technical field
What the agglomerating plant of a kind of preform of the utility model related to is preform sintering art, specifically, be utilize Laser feedback Controlling System to sintering oven the temperature in sintering process adjust in real time, to realize a kind of equipment that sintering process is carried out to closed-loop control.Use the carrying out of the temperature of this sintering oven in sintering process to adjust in real time, to realize the effective control to prefabricated rods transparency, prevent because the sintering temperature setting of sintering oven is improper, and after causing prefabricated rods sintering, barred body is opaque.
Background technology
At present, sintering oven is in the process of sintering prefabricated rods, and its temperature is mainly to control by temperature controller.Temperature controller is by presetting several stages, gives constant temp to each stage, and in the process of sintering prefabricated rods, temperature changes according to set(ting)value in advance.Carry out the control of sintering temperature by temperature controller, have a drawback: can not adjust in real time sintering temperature, be unfavorable for the accurate control to prefabricated rods transparency.
Chinese invention patent 02138227.1 has been introduced and a kind of has been carried out sintering prefabricated rods by a shrinkage rates COEFFICIENT K of design, utilizes prefabricated rods external diameter checking COEFFICIENT K, and revise after sintering, carrys out sintering and go out the method for qualified prefabricated rods with this.But there are two drawbacks in the method.One, improper if shrinkage rates COEFFICIENT K designs, can directly cause prefabricated rods to be burnt not saturating, thereby cause goods to scrap.They are two years old, different powder densities, need corresponding different shrinkage rates COEFFICIENT K, for scale operation, the Powder Rod density of every device fabrication can be each variant, therefore need to a corresponding shrinkage rates COEFFICIENT K for each equipment, it is very loaded down with trivial details that production process will become, and therefore the method suitability is not strong.
Chinese invention patent 200410041908.3 has been introduced a kind of method of variable Rate sintering prefabricated rods, in the first half section of sintering, takes a relatively slow sintering velocity, in the second half section of sintering, takes a comparatively faster sintering velocity.But, in this patent, have a major issue not mention.In the second half section of sintering, because the existing half of prefabricated rods completes sintering, the long-pending obviously minimizing of residual powder barred body in upper chamber, thus the heat in stove will upwards spread and lose due to thermophoresis principle.That is to say, in the second half section of sintering, in theory, should reduce the speed of sintering, allow Powder Rod fully absorb heat.If want to increase sintering velocity, must increase furnace temperature.This point is not mentioned in this patent.
Summary of the invention
The utility model object is for above-mentioned weak point, a kind of agglomerating plant of preform is proposed, the utility model can overcome the problem that current technique can not be adjusted in real time the temperature in sintering process, prefabricated rods transparency be control effectively, propose a kind of based on PID control techniques, adjust in real time temperature, the method for effectively controlling prefabricated rods transparency and the equipment thereof in sintering process, can effectively prevent because the sintering temperature setting of sintering oven is improper, and after causing prefabricated rods sintering, barred body is opaque.
A kind of agglomerating plant of preform is to take following technical scheme to realize:
A kind of agglomerating plant of preform comprises tower body, motor one, chuck, quartzy suspension rod, guide rail, suction opening, soot preforms, quartzy cavity, washing tower, body of heater, lagging material, heating member, temperature-controlling cabinet, quartzy furnace core tube, laser transmitter, laser pickoff, Cl
2gas holder, He gas holder, N
2gas holder, Cl
2mass flow controller (MFC), He mass flow controller (MFC), N
2mass flow controller (MFC), MFC flow control cabinet, laser controlling cabinet, supply and exhaust controller, motor controlling cabinet, motor two, thermopair, screw mandrel and control computer.
Guide rails assembling is on tower body top, and chuck is arranged on guide rail, and quartzy hanger erection, on chuck, packs soot preforms at quartzy suspension rod end, and soot preforms is arranged in quartzy cavity, and quartzy cavity is arranged in tower body.Chuck is connected with screw mandrel, and chuck is connected with motor one, and motor two drives screw mandrel rotation, motor one control card disc spins, and motor two is controlled screw mandrel rotation, so that chuck rises and declines along guide rail.Wherein, motor one, motor two are subject to motor controlling cabinet control.
Suction opening is connected by pipeline with washing tower, the waste gas of overflowing for drawing, process quartzy cavity.
Quartz cavity external body is provided with sintering oven, and sintering oven is made up of body of heater, lagging material, heating member, thermopair, and wherein, lagging material is between body of heater and heating member, and thermopair is measured the temperature of heating member through heat insulation material.Heating member, thermopair are connected with temperature-controlling cabinet by electric wire, signal wire respectively.Temperature-controlling cabinet is connected with control computer by control signal wire.
Laser transmitter, laser pickoff are arranged on respectively quartz furnace core tube both sides, sintering oven bottom, and laser transmitter, laser pickoff are connected with laser controlling cabinet by signal wire, and laser controlling cabinet is connected with temperature-controlling cabinet by signal wire.
Cl
2gas holder, He gas holder, N
2gas holder stores respectively Cl
2, He and N
2, gas passes through respectively gas pipeline, Cl
2mass flow controller (MFC), He mass flow controller (MFC), N
2mass flow controller (MFC) is connected with quartzy furnace core tube, gas Cl
2, He and N
2enter in quartzy furnace core tube.Wherein, Cl
2mass flow controller (MFC), He mass flow controller (MFC), N
2mass flow controller (MFC) is connected with MFC flow control cabinet by control line, in MFC flow control cabinet, programmable logic controller PLC is installed, Cl
2mass flow controller (MFC), He mass flow controller (MFC), N
2the flow of mass flow controller (MFC) is subject to the control of MFC flow control cabinet.
Mass flow controller, is called for short MFC, and its effect is the flow for controlling gas, by presetting several stages, gives constant flow to each stage, and in process of production, gas is supplied according to predefined flow.
Tower body is provided with supply and exhaust controller, air-supply and air draft in supply and exhaust controller control tower body.
Control computer and be used for sending " RUN ", " time-out ", " stopping " three kinds of signals, operating device running status.
Described laser transmitter adopts commercially available Thorlabs H050NL type laser transmitter.Described laser pickoff adopts commercially available Thorlabs S120C type laser pickoff.Mass flow controller (MFC), He mass flow controller (MFC) and N2 mass flow controller (MFC) adopt commercially available HORIBA N100 series mass flow director.
In described MFC flow control cabinet, EH150 series of PLC controller is housed.Thorlabs PM320 type laser controller is housed in described laser controlling cabinet.Supply and exhaust controller adopts commercially available SW62-WIFI type supply and exhaust controller.Described thermopair adopts commercially available R type thermopair.Described control computer adopts commercially available HITACH EH150 type industrial control computer.
A kind of sintering method of preform agglomerating plant is as follows:
1. gas supply
When sintering, by Cl
2gas in gas holder, He gas holder passes through respectively Cl
2mass flow controller (MFC), He mass flow controller (MFC) and pipeline enter in quartzy furnace core tube, by MFC flow control cabinet control gas flow.Wherein, the mass flow controller MFC(configuring in each gas circuit is AE FC-7800CD series mass flow director for example), for controlling the airshed of different steps.
2. sintered powder prefabricated rods
Prefabricated rods sintering is divided into 6 stages.Wherein:
Stage 1 belongs to the temperature rise period, and time 30min passes into the He of 10L/min;
Stage 3 belongs to the secondary temperature elevation stage, time 30min, and temperature rises 10 DEG C on the basis in stage 2, and that now pass into is the Cl of 500cc/min
2with the He of 10L/min, proceed deshydroxy and During Vitrification in vitro in this stage prefabricated rods;
Stage 4 belongs to the constant temperature stage, time 3h, and that now pass into is the Cl of 500cc/min
2with the He of 10L/min, proceed deshydroxy and During Vitrification in vitro in this stage prefabricated rods;
Stage 6 belongs to the standby stage, setting-up time 12h, and that now pass into is the N of 20L/min
2.
Before soot preforms packs into, suspension rod and quartzy cavity are in primary position.Under stages 6 state, first on temperature-controlling cabinet, set the temperature in each stage of sintering.Wherein, stage 1 Temperature Setting is 1150 DEG C, and stages 2 Temperature Setting is 1150 DEG C, and stages 3 Temperature Setting is 1160 DEG C, and stages 4 Temperature Setting is 1160 DEG C, and stages 5 Temperature Setting is 1050 DEG C, and stages 6 Temperature Setting is 1050 DEG C.
Under stages 6 state, pack soot preforms at quartzy suspension rod end, on control computer, assign " RUN " instruction, use afterwards suspension rod and quartzy cavity alternately to decline.Wherein, motor 1, under motor controlling cabinet 26 is controlled, makes chuck 3 and suspension rod 4 thereupon with the speed rotation of 1.5r/min, and motor 2 27, under motor controlling cabinet 26 is controlled, can decline along screw mandrel 29 and guide rail 5 suspension rod 4 with the speed of 3.0mm/min.After suspension rod 4 decline 1150mm, stop declining, quartzy cavity 8 continues to decline, until fall on the flange face of quartzy furnace core tube 14.After suspension rod 4 and the whole decline of quartzy cavity 8 put in place, control computer and send " time-out " instruction, object is to allow operator check the laminating degree of suspension rod 4, quartzy cavity 8 and quartzy furnace core tube 14 flange faces.
After operator check and finish, on control computer 30, send " RUN " instruction, after this program enters auto state, and detailed process is as follows:
Program automatically jumps to the stage 1 from the stage 6 and enters the temperature rise period, time 30min, and in 30min, furnace temperature rises to 1150 DEG C from 1050 DEG C, the speed rotation at this stage suspension rod with 1.5r/min, and do not decline;
Heat up and finish to enter the 2 constant temperature stages of stage, furnace temperature remains on 1150 DEG C, and time 9h declines with the speed rotation of 1.5r/min, the speed of 3.0mm/min at this stage suspension rod, and Powder Rod carries out deshydroxy and vitrifying;
After stage 2 finishes, program enters the stage 3 automatically, time 30min, temperature rises 10 DEG C on the basis in stage 2 in 30min, rise to 1160 DEG C, decline with the speed rotation of 1.5r/min, the speed of 3.0mm/min at this stage suspension rod, Powder Rod is proceeded deshydroxy and vitrifying;
After stage 3 finishes, program enters the 4 constant temperature stages of stage automatically, and furnace temperature remains on 1160 DEG C, and time 3h declines with the speed rotation of 1.5r/min, the speed of 3.0mm/min at this stage suspension rod, and Powder Rod is proceeded deshydroxy and vitrifying;
After stage 4 finishes, program enters stages 5 temperature-fall period automatically, time 30min, in this stage, in the speed of suspension rod with the speed rotation of 1.5r/min, 3.0mm/min, carry 1700mm, stop deshydroxy and vitrifying, furnace temperature drops to 1050 DEG C from 1160 DEG C in 30min;
After stage 5 finishes, program enters the 6 standby stages of stage automatically, enters 6 o'clock stages just, suspension rod and quartzy cavity alternately rise, and get back to primary position, and prefabricated rods is exposed to carries out naturally cooling in air, barred body surface cool to 50 DEG C about 1h of required time, just can carry out unloading operation afterwards.
3. Laser feedback control
Laser controlling cabinet is analyzed the difference DELTA P of P and P ', and in the scope of the interior setting Δ of laser controlling cabinet 24 P, wherein, the minimum value of Δ P is Δ Pmin in advance, and the maximum value of Δ P is Δ Pmax, and Δ Pmin and Δ Pmax set according to practical situation.When in sintering process, when Δ P ﹤ Δ Pmin or Δ P ﹥ Δ Pmax, trigger a signal by laser controlling cabinet, be delivered to temperature-controlling cabinet, temperature-controlling cabinet is adjusted Current Temperatures, adjusts principle to be:
When Δ P ﹤ Δ Pmin, show prefabricated rods poor transparency, need to increase sintering temperature;
When Δ Pmin≤Δ P≤Δ Pmax, show that prefabricated rods transparency meets expection, does not need to adjust temperature;
When Δ P ﹥ Δ Pmax, show that prefabricated rods transparency exceedes expection, barred body may produce elongation, drawing-down, needs to reduce sintering temperature.
Concrete control process is:
In the time of Δ P ﹤ Δ Pmin, laser controlling cabinet 24 triggers an intensification signal and is delivered to temperature-controlling cabinet, and temperature-controlling cabinet carries out automatic heating operation, and real time temperature is fed back to temperature-controlling cabinet by thermopair, and in the time reaching target temperature, temperature-controlling cabinet stops warming temperature automatically;
In the time of Δ Pmin≤Δ P≤Δ Pmax, live signal is delivered to temperature-controlling cabinet by laser controlling cabinet, and temperature-controlling cabinet judgement does not now need to carry out temperature adjustment;
In the time of Δ P ﹥ Δ Pmax, laser controlling cabinet triggers an intensification signal and is delivered to temperature-controlling cabinet, and temperature-controlling cabinet carries out cooling operation automatically, and real time temperature is fed back to temperature-controlling cabinet by thermopair, and in the time reaching target temperature, temperature-controlling cabinet stops cooling operation automatically.
Above process is Laser feedback control working process.
4. exhaust collection, processing
The tail gas producing in sintering process, main component is HCl, HF, is collected, and be transferred to washing tower by pipeline by suction opening.In washing tower, contain NaOH alkali lye, and tail gas carries out neutralization reaction, finally make tail gas reach emission standard.
The agglomerating plant advantage of a kind of preform of the utility model is:
1. in whole sintering process, utilize Laser feedback control, transparency situation that can Real-time Obtaining prefabricated rods, and respond in time, adjust sintering temperature, thereby make prefabricated rods transparency become adjustable in real time online;
2. prevent from causing because Temperature Setting is improper prefabricated rods to burn not saturating, meanwhile, allow whole prefabricated rods sintering process become automatization more, intellectuality.
Brief description of the drawings
Below with reference to accompanying drawing, the utility model is described in further detail:
Fig. 1 is prefabricated rods agglomerating plant schematic diagram.
Embodiment
With reference to accompanying drawing 1, a kind of agglomerating plant of preform comprises tower body 1, motor 1, chuck 3, quartzy suspension rod 4, guide rail 5, suction opening 6, soot preforms 7, quartzy cavity 8, washing tower 9, body of heater 10, lagging material 11, heating member 12, temperature-controlling cabinet 13, quartzy furnace core tube 14, laser transmitter 15, laser pickoff 16, Cl
2gas holder 17, He gas holder 18, N
2gas holder 19, Cl
2mass flow controller (MFC) 20, He mass flow controller (MFC) 21, N
2mass flow controller (MFC) 22, MFC flow control cabinet 23, laser controlling cabinet 24, supply and exhaust controller 25, motor controlling cabinet 26, motor 2 27, thermopair 28, screw mandrel 29 and control computer 30.
As shown in Figure 1, guide rail 5 is arranged on tower body 1 top, and chuck 3 is arranged on guide rail 5, and quartzy suspension rod 4 is arranged on chuck 3, packs soot preforms 7 at quartzy suspension rod 4 ends, and soot preforms 7 is arranged in quartzy cavity 8, and quartzy cavity 8 is arranged in tower body 1.Chuck 3 is connected with screw mandrel 29, and chuck 3 is connected with motor 1, and motor 2 27 drives screw mandrel 29 to rotate, and motor 1 is controlled chuck 3 and rotated, and motor 2 27 is controlled screw mandrel 29 and rotated, so that chuck 3 rises and declines along guide rail 5.Wherein, motor 1, motor 2 27 are controlled by motor controlling cabinet 26.
Suction opening 6 is connected by pipeline with washing tower 9, the waste gas of overflowing for drawing, process quartzy cavity 8.
Quartz cavity 8 outsides are provided with sintering oven, and sintering oven is made up of body of heater 10, lagging material 11, heating member 12, thermopair 28, and wherein, lagging material 11 is between body of heater 10 and heating member 12, and thermopair 28 is measured the temperature of heating member 12 through lagging material 11.Heating member 12, thermopair 28 are connected with temperature-controlling cabinet 13 by electric wire, signal wire respectively.Temperature-controlling cabinet 13 is connected with control computer 30 by control signal wire.
Cl
2gas holder 17, He gas holder 18, N
2gas holder 19 stores respectively Cl
2, He and N
2, gas passes through respectively gas pipeline, Cl
2mass flow controller (MFC) 20, He mass flow controller (MFC) 21, N
2mass flow controller (MFC) 22 is connected with quartzy furnace core tube 14, gas Cl
2, He and N
2enter in quartzy furnace core tube 14.Wherein, Cl
2mass flow controller (MFC) 20, He mass flow controller (MFC) 21, N
2mass flow controller (MFC) 22 is connected with MFC flow control cabinet 23 by control line, in MFC flow control cabinet 23, programmable logic controller PLC is installed, Cl
2mass flow controller (MFC) 20, He mass flow controller (MFC) 21, N
2the flow of mass flow controller (MFC) 22 is controlled by MFC flow control cabinet 23.
Mass flow controller, is called for short MFC, and its effect is the flow for controlling gas, by presetting several stages, gives constant flow to each stage, and in process of production, gas is supplied according to predefined flow.
Tower body 1 is provided with supply and exhaust controller 25, and supply and exhaust controller 25 is controlled air-supply and the air draft in tower body 1.
Described laser transmitter 15 adopts commercially available Thorlabs H050NL type laser transmitter.Described laser pickoff 16 adopts commercially available Thorlabs S120C type laser pickoff.Mass flow controller (MFC) 20, He mass flow controller (MFC) 21 and N2 mass flow controller (MFC) 22 adopt commercially available HORIBA N100 series mass flow director.
In described MFC flow control cabinet 23, EH150 series of PLC controller is housed.Thorlabs PM320 type laser controller is housed in described laser controlling cabinet 24.Supply and exhaust controller 25 adopts commercially available SW62-WIFI type supply and exhaust controller.Described thermopair 28 adopts commercially available R type thermopair.Described control computer 30 adopts commercially available HITACH EH150 type industrial control computer.
Above quartzy suspension rod 4, soot preforms 7 is installed, is sent in stove, quartzy cavity 8 drops down onto on quartzy furnace core tube 14, and both fit by flange face completely.
Along with rotation and the decline of chuck 3, soot preforms 7 is spinned and is moved downward, and meanwhile, passes into Cl in stove
2and He.Furnace temperature changed according to predefined some stages.
In the time that 7 times caudal peduncles of soot preforms arrive at laser place level attitude, Laser feedback Controlling System enters working order.Laser transmitter 15 sends with certain frequency the laser beam that power P is constant, is received by laser pickoff 16, and receiving end power is P '.Laser controlling cabinet 24 is analyzed the difference DELTA P of P and P '.In laser controlling cabinet, set in advance the scope of Δ P, when in sintering process, when Δ P exceedes setting range, trigger a signal by laser controlling cabinet, be delivered to temperature-controlling cabinet 13, temperature-controlling cabinet 13 is adjusted Current Temperatures.
The scope of Δ P is Δ Pmin～Δ Pmax.In the time that Δ P is between Δ Pmin～Δ Pmax, illustrate that prefabricated rods transparency states is normal, without adjusting temperature; In the time of Δ P> Δ Pmax, illustrate that prefabricated rods transparency is too high, barred body may be elongated, drawing-down, need to reduce temperature; In the time of Δ P< Δ Pmax, illustrate that prefabricated rods transparency is too low, rod is insufficient burnt, need to increase temperature.
A kind of sintering method of preform is as follows:
1. gas supply
When sintering, by Cl
2gas in gas holder 17, He gas holder 18 passes through respectively Cl
2mass flow controller (MFC) 20, He mass flow controller (MFC) 21 and pipeline enter in quartzy furnace core tube 14, control gas flow by MFC flow control cabinet 23.Wherein, the mass flow controller MFC(configuring in each gas circuit is AE FC-7800CD series mass flow director for example), for controlling the airshed of different steps.
2. sintered powder prefabricated rods
Prefabricated rods sintering is divided into 6 stages.Wherein:
Stage 1 belongs to the temperature rise period, and time 30min passes into the He of 10L/min;
Stage 3 belongs to the secondary temperature elevation stage, time 30min, and temperature rises 10 DEG C on the basis in stage 2, and that now pass into is the Cl of 500cc/min
2with the He of 10L/min, proceed deshydroxy and During Vitrification in vitro in this stage prefabricated rods;
Stage 4 belongs to the constant temperature stage, time 3h, and that now pass into is the Cl of 500cc/min
2with the He of 10L/min, proceed deshydroxy and During Vitrification in vitro in this stage prefabricated rods;
Stage 6 belongs to the standby stage, setting-up time 12h, and that now pass into is the N of 20L/min
2.
Before soot preforms 7 packs into, suspension rod 4 and quartzy cavity 8 are in primary position.Under stages 6 state, first on temperature-controlling cabinet 13, set the temperature in each stage of sintering.Wherein, stage 1 Temperature Setting is 1150 DEG C, and stages 2 Temperature Setting is 1150 DEG C, and stages 3 Temperature Setting is 1160 DEG C, and stages 4 Temperature Setting is 1160 DEG C, and stages 5 Temperature Setting is 1050 DEG C, and stages 6 Temperature Setting is 1050 DEG C.
Under stages 6 state, pack soot preforms 7 at quartzy suspension rod 4 ends, on control computer 30, assign " RUN " instruction, use afterwards suspension rod 4 and quartzy cavity 8 alternately to decline.Wherein, motor 1, under motor controlling cabinet 26 is controlled, makes chuck 3 and suspension rod 4 thereupon with the speed rotation of 1.5r/min, and motor 2 27, under motor controlling cabinet 26 is controlled, can decline along screw mandrel 29 and guide rail 5 suspension rod 4 with the speed of 3.0mm/min.After suspension rod 4 decline 1150mm, stop declining, quartzy cavity 8 continues to decline, until fall on the flange face of quartzy furnace core tube 14.After suspension rod 4 and the whole decline of quartzy cavity 8 put in place, control computer and send " time-out " instruction, object is to allow operator check the laminating degree of suspension rod 4, quartzy cavity 8 and quartzy furnace core tube 14 flange faces.
After operator check and finish, on control computer 30, send " RUN " instruction, after this program enters auto state:
Program automatically jumps to the stage 1 from the stage 6 and enters the temperature rise period, time 30min, and in 30min, furnace temperature rises to 1150 DEG C from 1050 DEG C, the speed rotation at this stage suspension rod with 1.5r/min, and do not decline;
Heat up and finish to enter the 2 constant temperature stages of stage, furnace temperature remains on 1150 DEG C, and time 9h declines with the speed rotation of 1.5r/min, the speed of 3.0mm/min at this stage suspension rod, and Powder Rod carries out deshydroxy and vitrifying;
After stage 2 finishes, program enters the stage 3 automatically, time 30min, temperature rises 10 DEG C on the basis in stage 2 in 30min, rise to 1160 DEG C, decline with the speed rotation of 1.5r/min, the speed of 3.0mm/min at this stage suspension rod, Powder Rod is proceeded deshydroxy and vitrifying;
After stage 3 finishes, program enters the 4 constant temperature stages of stage automatically, and furnace temperature remains on 1160 DEG C, and time 3h declines with the speed rotation of 1.5r/min, the speed of 3.0mm/min at this stage suspension rod, and Powder Rod is proceeded deshydroxy and vitrifying;
After stage 4 finishes, program enters stages 5 temperature-fall period automatically, time 30min, in this stage, in the speed of suspension rod with the speed rotation of 1.5r/min, 3.0mm/min, carry 1700mm, stop deshydroxy and vitrifying, furnace temperature drops to 1050 DEG C from 1160 DEG C in 30min;
After stage 5 finishes, program enters the 6 standby stages of stage automatically, enters 6 o'clock stages just, suspension rod 4 and quartzy cavity 8 alternately rises, and gets back to primary position, and prefabricated rods is exposed to carries out naturally cooling in air, barred body surface cool to 50 DEG C about 1h of required time, just can carry out unloading operation afterwards.
3. Laser feedback control
Soot preforms 7 is in sintering process, and laser transmitter 15 sends the laser that a branch of wavelength 850nm, power P are 5mw, and laser, through soot preforms, arrives laser pickoff 16, and receiving end power is P '.
When Δ P ﹤ Δ Pmin, show prefabricated rods poor transparency, need to increase sintering temperature;
When Δ Pmin≤Δ P≤Δ Pmax, show that prefabricated rods transparency meets expection, does not need to adjust temperature;
When Δ P ﹥ Δ Pmax, show that prefabricated rods transparency exceedes expection, barred body may produce elongation, drawing-down, needs to reduce sintering temperature.
Concrete control process is:
In the time of Δ P ﹤ Δ Pmin, laser controlling cabinet 24 triggers an intensification signal and is delivered to temperature-controlling cabinet 13, and temperature-controlling cabinet 13 carries out automatic heating operation, and real time temperature is fed back to temperature-controlling cabinet 13 by thermopair 28, in the time reaching target temperature, temperature-controlling cabinet 13 stops warming temperature automatically;
In the time of Δ Pmin≤Δ P≤Δ Pmax, live signal is delivered to temperature-controlling cabinet 13 by laser controlling cabinet 24, and temperature-controlling cabinet 13 judges does not now need to carry out temperature adjustment;
In the time of Δ P ﹥ Δ Pmax, laser controlling cabinet 24 triggers an intensification signal and is delivered to temperature-controlling cabinet 13, and temperature-controlling cabinet 13 carries out cooling operation automatically, and real time temperature is fed back to temperature-controlling cabinet 13 by thermopair 28, in the time reaching target temperature, temperature-controlling cabinet 13 stops cooling operation automatically.
Above process is Laser feedback control working process.
4. exhaust collection, processing
The tail gas producing in sintering process, main component is HCl, HF, is collected, and be transferred to washing tower 9 by pipeline by suction opening 6.In washing tower 9, contain NaOH alkali lye, and tail gas carries out neutralization reaction, finally make tail gas reach emission standard.
The gas that the utility model relates to comprises: one, Cl
2, its effect is: 1, remove the hydroxyl in Powder Rod, reduce the water peak of optical fiber; 2 and metallic impurity reactions, generate halogenide and vapor away, thereby reduce the pad value of optical fiber at 1310nm wave band.Two, He, its effect is: 1, conduction heat, makes Powder Rod change smoothly clear state into; 2, replace the residual Cl in rod
2, shrink pore.Three, N
2, its effect is in the time of device standby, to purging in stove.
Embodiment mono-:
On temperature-controlling cabinet 13, set needed temperature of each stage, then above quartzy suspension rod 4, soot preforms 7 is installed, send in stove, carry out sintering according to the sintering method of prefabricated rods mentioned above.Penetrating a branch of wavelength from laser transmitter 15 is the laser that 850nm, power are 5.0mw, and the signal gathering unit in laser controlling cabinet 24 gathers a receiving end receiving end laser power P ' every 5s, and calculates the difference DELTA P=5mw-P ' of power.Wherein, the higher limit Δ Pmax of Δ P is set as 4.5mw, and the lower value Δ Pmin of Δ P is set as 3.5mw.
In the time that caudal peduncle under prefabricated rods arrives at laser place level attitude, laser perceives prefabricated rods, enters working order.In the time that Δ P value exceedes Δ Pmax, in laser controlling cabinet, transmit a signal to temperature-controlling cabinet 13, require it that furnace temperature is lowered to 10 DEG C; When Δ P value is during lower than Δ Pmin, in laser controlling cabinet, transmit a signal to temperature-controlling cabinet 13, require it that furnace temperature is raised to 10 DEG C.
Embodiment bis-:
On temperature-controlling cabinet 13, set needed temperature of each stage, then above quartzy suspension rod 4, soot preforms 7 is installed, send in stove, carry out sintering according to the sintering method of prefabricated rods mentioned above.Penetrating a branch of wavelength from laser transmitter 15 is the laser that 850nm, power are 5.0mw, and the signal gathering unit in laser controlling cabinet 24 gathers a receiving end receiving end laser power P ' every 5s, and calculates the difference DELTA P=5mw-P ' of power.Wherein, the higher limit Δ Pmax of Δ P is set as 4.2mw, and the lower value Δ Pmin of Δ P is set as 3.8mw.
In the time that caudal peduncle under prefabricated rods arrives at laser place level attitude, laser perceives prefabricated rods, enters working order.In the time that Δ P value exceedes Δ Pmax, in laser controlling cabinet, transmit a signal to temperature-controlling cabinet 13, require it that furnace temperature is lowered to 5 DEG C; When Δ P value is during lower than Δ Pmin, in laser controlling cabinet, transmit a signal to temperature-controlling cabinet 13, require it that furnace temperature is raised to 5 DEG C.
Through embodiment mono-and embodiment bis-are relatively found, embodiment bis-, by dwindling the bound of Δ P, reduces the amplitude that each furnace temperature is adjusted, final: one, to make system response rapider; Two, control is more effective.
Claims (1)
1. an agglomerating plant for preform, is characterized in that: comprise tower body, motor one, chuck, quartzy suspension rod, guide rail, suction opening, soot preforms, quartzy cavity, washing tower, body of heater, lagging material, heating member, temperature-controlling cabinet, quartzy furnace core tube, laser transmitter, laser pickoff, Cl
2gas holder, He gas holder, N
2gas holder, Cl
2mass flow controller, He mass flow controller, N
2mass flow controller, MFC flow control cabinet, laser controlling cabinet, supply and exhaust controller, motor controlling cabinet, motor two, thermopair, screw mandrel and control computer;
Guide rails assembling is on tower body top, and chuck is arranged on guide rail, and quartzy hanger erection is on chuck, pack soot preforms at quartzy suspension rod end, soot preforms is arranged in quartzy cavity, and quartzy cavity is arranged in tower body, chuck is connected with screw mandrel, chuck is connected with motor one, and motor two drives screw mandrel rotation, motor one control card disc spins, motor two is controlled screw mandrel rotation, so that chuck rises and declines along guide rail, wherein, motor, motor are subject to motor controlling cabinet control;
Suction opening is connected by pipeline with washing tower, the waste gas of overflowing for drawing, process quartzy cavity;
Quartz cavity external body is provided with sintering oven, sintering oven is made up of body of heater, lagging material, heating member, thermopair, wherein, lagging material is between body of heater and heating member, thermopair is measured the temperature of heating member through lagging material, heating member, thermopair are connected with temperature-controlling cabinet by electric wire, signal wire respectively, and temperature-controlling cabinet is connected with control computer by control signal wire;
Laser transmitter, laser pickoff are arranged on respectively quartz furnace core tube both sides, sintering oven bottom, and laser transmitter, laser pickoff are connected with laser controlling cabinet by signal wire, and laser controlling cabinet is connected with temperature-controlling cabinet by signal wire;
Cl
2gas holder, He gas holder, N
2gas holder stores respectively Cl
2, He and N
2, gas passes through respectively gas pipeline, Cl
2mass flow controller, He mass flow controller, N
2mass flow controller is connected with quartzy furnace core tube, gas Cl
2, He and N
2enter in quartzy furnace core tube, wherein, Cl
2mass flow controller, He mass flow controller, N
2mass flow controller is connected with MFC flow control cabinet by control line, in MFC flow control cabinet, programmable logic controller PLC is installed, Cl
2mass flow controller, He mass flow controller, N
2the flow of mass flow controller is subject to the control of MFC flow control cabinet;
Tower body is provided with supply and exhaust controller, air-supply and air draft in supply and exhaust controller control tower body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320860820.9U CN203668232U (en) | 2013-12-25 | 2013-12-25 | Sintering equipment of optical fiber preform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320860820.9U CN203668232U (en) | 2013-12-25 | 2013-12-25 | Sintering equipment of optical fiber preform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203668232U true CN203668232U (en) | 2014-06-25 |
Family
ID=50964548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320860820.9U Withdrawn - After Issue CN203668232U (en) | 2013-12-25 | 2013-12-25 | Sintering equipment of optical fiber preform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203668232U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739194A (en) * | 2013-12-25 | 2014-04-23 | 中天科技精密材料有限公司 | Sintering method of optical fiber preform and equipment thereof |
| CN106587589A (en) * | 2016-12-20 | 2017-04-26 | 长飞光纤光缆股份有限公司 | Glass rod sintering furnace used for making optical fiber preform |
-
2013
- 2013-12-25 CN CN201320860820.9U patent/CN203668232U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739194A (en) * | 2013-12-25 | 2014-04-23 | 中天科技精密材料有限公司 | Sintering method of optical fiber preform and equipment thereof |
| CN103739194B (en) * | 2013-12-25 | 2015-12-23 | 中天科技精密材料有限公司 | A kind of sintering method of preform and equipment thereof |
| CN106587589A (en) * | 2016-12-20 | 2017-04-26 | 长飞光纤光缆股份有限公司 | Glass rod sintering furnace used for making optical fiber preform |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHONGTIAN SCIENCE AND TECHNOLOGY CO LTD, JIANGSU Z Effective date: 20150417 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150417 Address after: 226009 Nantong economic and Technological Development Zone, Jiangsu Zhongtian Road, No. 3 Patentee after: Jiangsu Zhongtian Technology Precision Material Co., Ltd. Patentee after: Zhongtian Science and Technology Co., Ltd., Jiangsu Patentee after: Zhongtian Technologies Fiber Optics Co., Ltd. Address before: 226009 Nantong economic and Technological Development Zone, Jiangsu Zhongtian Road, No. 3 Patentee before: Jiangsu Zhongtian Technology Precision Material Co., Ltd. |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140625 Effective date of abandoning: 20151223 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |