CN109539766A - A kind of accurate temperature control method of tunnel oven bringing-up section disturbance rejection - Google Patents
A kind of accurate temperature control method of tunnel oven bringing-up section disturbance rejection Download PDFInfo
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- CN109539766A CN109539766A CN201811352295.3A CN201811352295A CN109539766A CN 109539766 A CN109539766 A CN 109539766A CN 201811352295 A CN201811352295 A CN 201811352295A CN 109539766 A CN109539766 A CN 109539766A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract 1
- 101100190617 Arabidopsis thaliana PLC2 gene Proteins 0.000 description 9
- 101100408456 Arabidopsis thaliana PLC8 gene Proteins 0.000 description 9
- 101100464304 Caenorhabditis elegans plk-3 gene Proteins 0.000 description 9
- 101100093534 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RPS1B gene Proteins 0.000 description 9
- 239000005022 packaging material Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 230000001954 sterilising effect Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- JGSARLDLIJGVTE-UHFFFAOYSA-N 3,3-dimethyl-7-oxo-6-[(2-phenylacetyl)amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid Chemical compound O=C1N2C(C(O)=O)C(C)(C)SC2C1NC(=O)CC1=CC=CC=C1 JGSARLDLIJGVTE-UHFFFAOYSA-N 0.000 description 1
- VEUACKUBDLVUAC-UHFFFAOYSA-N [Na].[Ca] Chemical compound [Na].[Ca] VEUACKUBDLVUAC-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003708 ampul Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009512 pharmaceutical packaging Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Temperature (AREA)
Abstract
The present invention provides a kind of accurate temperature control methods of tunnel oven bringing-up section disturbance rejection, heating tube power is controlled by the temperature in active conveying bottle channel in high temperature section in detection baking oven, when actual temperature to be detected and preset temperature are stored in constant difference, adjust corresponding blower frequency, air output size is controlled, the intracorporal temperature of guard box realizes dynamic equilibrium.The temprature control method can either eliminate unpredictalbe disturbance of air-supply environment heat circulating system automatically, and it is temperature controlled more accurate to make bringing-up section, and regulating time is shorter.
Description
Technical field
The invention belongs to the control fields of drying equipment, and in particular to a kind of accurate temperature of tunnel oven bringing-up section disturbance rejection
Spend control method.
Background technique
Tunnel oven is mainly used to that sterilizing is dried to oral liquid bottle, cillin bottle, ampoule bottle, removes heat source.Bringing-up section temperature
Stability and the uniformity for spending control are particularly important.Temperature control is unstable, uniformity is bad will lead to drug packaging material (sodium calcium glass
Glass bottle, low borosilicate bottle etc.) make a bottle packaging material be easy to happen fried bottle, broken bottle due to uneven heating, and glass chip can pollute other
Bottle packaging material and oven interior environment are to influence product quality.
In the prior art, as the patent of Publication No. CN106556229A discloses a kind of temperature of tunnel sterilizing and drying machine
Control method is spent, this method passes through the temperature in preheating section 1, pre-add hot arc 4, bringing-up section 2 and cooling section 3 before detecting bottle
Information, the preset value with preheating section 1, pre-add hot arc 4, bringing-up section 2 and cooling section 3 compares respectively, executes heating or drop
Temperature processing is to guarantee that temperature of each section reaches preset value.
Only single use passes through the temp probe temperature collection of heating zone to original tunnel sterilizing and drying machine, then passes through
PLC compares the temperature of acquisition and artificial required temperature, that is, set temperature, lowers electricity-saving heating pipe in existing environment
Given value of current, cooled down or the control that heats up.But since the influence of hot air circulating system and the uncertainty of environment make
There is disturbance in the system of obtaining, lead to the given of heat in this way and imbalance of scattering and disappearing is along with the regional scope of control is big, environmental factor
Variation make final temperature control fluctuation it is big, temperature stabilization times are long, once and environment change, the stability of system
It changes again and takes a long time to stablize.The temperature control of the tunnel sterilizing and drying machine bringing-up section of the prior art is full
When load within ± 15 DEG C, when unloaded within ± 10 DEG C, although meeting national relevant laws and regulations or standard in this temperature range
Requirement, but in actual production once encounter the poor packaging material of material and so there is larger fried bottle bottle, broken bottle risk.
Summary of the invention
(1) technical problems to be solved
In view of the drawbacks of the prior art, the present invention provides a kind of controls of the accurate temperature of tunnel oven bringing-up section disturbance rejection
Method, can either eliminate unpredictalbe disturbance of air-supply environment heat circulating system automatically, and can make bringing-up section temperature control
That makes is more accurate, and regulating time is shorter.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include:
The present invention provides a kind of accurate temperature control method of tunnel oven bringing-up section disturbance rejection, it is equipped in the baking oven
Blower and heating tube, wherein the temprature control method comprises the following steps:
S1: giving a fixation running frequency being manually arranged to open the blower, so that wind system circulation is carried out, with
After open the heating tube bringing-up section heated；
S2: detecting the temperature of the bringing-up section and is compared with preset temperature, and comparison result is sent to automatic control
Device one processed；
S3: the automatic controller one automatically adjusts the output power of heating tube according to the comparison result, so that currently
Bringing-up section temperature close to preset temperature, and the temperature of the current bringing-up section is kept in the first preset range value
Stablize, first preset range value refer to bringing-up section temperature full load control within ± 15 DEG C, when unloaded control ±
Within 10 DEG C；
S4: the running frequency of the blower is automatically adjusted to control air output size by automatic controller two, and simultaneously
Continue the output power of automatic adjustment heating tube by the automatic controller one, so that the temperature of the bringing-up section is pre- second
If keeping stablizing in value range, the second preset range value is less than first preset range value.
Further, second preset range value refers to that bringing-up section temperature full load controls within ± 5 DEG C, unloaded
When control within ± 2 DEG C.
Further, the output power of the heating tube is specifically controlled using three-phase walk trigger and solid-state relay.
Further, the blower carries out blast velocity control using frequency converter, and the fixed running frequency in step S1 is
35Hz-45Hz。
Further, the automatic controller one and automatic controller two are fuzzy controller, adaptive controller or PID
Controller.
Further, the automatic controller one and automatic controller two are arranged by the Human-machine Control interface of monitoring system
Controller parameter.
Further, the temprature control method can also comprise the steps of S5；
S5: when detecting that the wind speed in bringing-up section is too high or too low by the anemobiagraph in bringing-up section, switch the wind
The running frequency of machine jumps back to step S2, then to the fixed running frequency again to adjust the temperature of the bringing-up section
In second preset range value.
Further, when detecting that the wind speed in bringing-up section is too high or too low by the anemobiagraph in bringing-up section, can lead to
It crosses monitoring system and carries out warning note.
Further, the temperature of the bringing-up section is detected using temperature sensor.
Further, the temperature sensor is thermocouple or thermal resistance.
(3) beneficial effect
As shown from the above technical solution, compared with the existing technology, the present invention have it is following the utility model has the advantages that
1) temprature control method of the invention meets technique requirement by the temperature automatic control of multistage, thus reasonably
Blower is utilized and has carried out fine tuning to temperature, enables the system to the imprevision for eliminating air-supply environment heat circulating system automatically
Disturbance；
2) present invention to found in actual working environment the technical issues of propose targetedly solution, and close
Existing device is utilized in tunnel oven to realize above-mentioned temprature control method, so that bringing-up section is temperature controlled in reason
It is more accurate；
3) by reasonably selecting insertion opportunity and the condition of air-blower control, so that total regulating time of control system is significantly
Shorten；
4) it introduces step S5 to have carried out monitoring to the wind speed of bringing-up section and adjusted again, control system is allowed to seek again if necessary
New control equalization point is looked for, to guarantee that temperature in bringing-up section and wind speed can meet the technique requirement of production simultaneously.
Detailed description of the invention
The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, and attached drawing is schematically without that should manage
Solution is carries out any restrictions to the present invention, in the accompanying drawings:
Fig. 1 is the control system schematic diagram of tunnel oven bringing-up section of the present invention；
Fig. 2 is the flow chart of the accurate temperature control method of tunnel oven bringing-up section disturbance rejection of the present invention.
Description of symbols:
1- frequency converter, 2-PLC, 3- industrial personal computer Human-machine Control interface, 4- blower, 5- heating tube, 6- anemobiagraph, 7- temperature pass
Sensor, 8- three-phase walk trigger, 9- solid-state relay.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
As shown in Figure 1, it is the control system schematic diagram of tunnel oven bringing-up section of the present invention, which includes becoming
Frequency device 1, PLC2, industrial human-computer control interface 3, blower 4, heating tube 5, anemobiagraph 6, temperature sensor 7, three-phase walk trigger
8, solid-state relay 9, wherein frequency converter 1, PLC2, industrial human-computer control interface 3, three-phase walk trigger 8, solid-state relay 9
In electric cabinet, blower 4, heating tube 5, anemobiagraph 6, temperature sensor 7 is located in tunnel oven bringing-up section, the tool of each component
Body position is referring to Fig. 1.
Specifically, the control method of the control system are as follows: be conveyed by the temperature that temperature sensor 7 detects bringing-up section
In PLC2, and compared with the preset temperature manually set, after the dynamic analysis that data are carried out by PLC2, PLC2 is to heating circuit
PID control is carried out, control is adjusted by the analog quantity channel control phase phase shift trigger 8 and solid-state relay 9 of PLC at any time and is added
Heat pipe 5 gives constant current.When the temperature of bringing-up section is intended to stable state close to preset temperature, the air-supply to bringing-up section is put into
The PID of the frequency converter 1 of the blower 4 of layer adjusts control.At this point, fan operation frequency is no longer the original fixed fortune manually set
Line frequency, fixed running frequency are switched to the automatic control of PID arithmetic, make bringing-up section under the action of two-way PID is adjusted
Temperature control is more accurate and stablizes.Finally make the control of full load bringing-up section temperature at ± 5 DEG C, when unloaded within ± 2 DEG C.This
Sample is greatly lowered the risk of the broken bottle of tunnel oven.
According to above-mentioned control method it is found that the temperature of acquisition and the difference of set temperature is needed to input PLC2 because of PLC2
In PID controller carry out operation, export after operation to the control and regulation signal of heating tube 5, so that the temperature of bringing-up section
Close to preset temperature.The temperature of bringing-up section is closer to preset temperature at this time, but since (this frequency is the fixation running frequency of blower
Artificial setting) it is not necessarily suitable, so that Heating Zone Temperature is fluctuating always general full load within ± 15 DEG C, ± 10 when unloaded
Within DEG C, therefore need to be finely adjusted blower frequency.At this point, system control disconnects the fixation running frequency of original frequency converter 5
Control model, starts PID control mode, the input value that the temperature difference is calculated as PID, and output valve is that the control of fan frequency converter is believed
Number, according to the temperature of bringing-up section, make the deceleration appropriate of the revolving speed of blower or acceleration.Tune while heating power and rotation speed of fan
Under section, the wind system environment of control system is more suitable for the transmitting of heat, finally makes temperature control more accurate.Full load bringing-up section
Temperature is controlled at ± 5 DEG C, when unloaded within ± 2 DEG C.
Because A grades of laminar flows (laminar flow i.e. on bottle packaging material conveyer belt) require wind speed, it is desirable that its be maintained at 0.36m/s~
0.54m/s, therefore it is being internally provided with anemobiagraph 6, pass through industrial people (when too large or too small) when wind speed is more than allowed band
Machine control interface 3 carries out remote alarms, and the running frequency of adjustment again, blower 4 is switched to originally by the output power of heating tube 5
The fixed frequency manually set, to readjust the control parameter of two PID controllers in PLC.
Fig. 2 is the flow chart of the accurate temperature control method of tunnel oven bringing-up section disturbance rejection of the present invention, in conjunction with attached drawing 1
Control system, the present invention have carried out the description of following inductive to the temprature control method of above-mentioned control system:
A kind of accurate temperature control method of tunnel oven bringing-up section disturbance rejection, the baking oven is interior to be equipped with blower 4 and heating
Pipe 5, the temprature control method comprise the following steps:
S1: giving a fixation running frequency being manually arranged to open the blower 4, so that wind system circulation is carried out,
The later on heating tube 5 heats the bringing-up section；
S2: detecting the temperature of the bringing-up section and is compared with preset temperature, and comparison result is sent to automatic control
Device one processed；
S3: the automatic controller one automatically adjusts the output power of heating tube according to the comparison result, so that currently
Bringing-up section temperature close to preset temperature, and the temperature of the current bringing-up section is kept in the first preset range value
Stablize；
S4: the running frequency of the blower is automatically adjusted to control air output size by automatic controller two, and simultaneously
Continue the output power of automatic adjustment heating tube by the automatic controller one, so that the temperature of the bringing-up section is pre- second
If keeping stablizing in value range, the second preset range value is less than first preset range value.
In addition, the embodiment can make it is following further limit, first preset range value refers to bringing-up section
Temperature full load controls within ± 15 DEG C, and within ± 10 DEG C, second preset range value refers to adding for control when unloaded
Hot arc temperature full load controls within ± 5 DEG C, and control is within ± 2 DEG C when unloaded.
Based on Fig. 1 it is found that since PLC2 is a multi-functional controller, various automatic controls can be realized by programming
Method processed, therefore the automatic controller one and automatic controller two can be fuzzy controller, adaptive controller or PID control
Device, so that its double automatic control system for finally constituting one " heating tube+blower " based on double automatic controllers；The blower
5 carry out wind speed frequency control using frequency converters 1, according to the control experience at staff scene, manually setting in step S1
Fixed running frequency may be configured as 35Hz-45Hz, and guarantee that heating system could be opened after having wind system circulation.In addition, the control
System processed specifically uses three-phase walk trigger 8 and solid-state relay 9 to control the output power of the heating tube 5.
Further, the real time monitoring that can also use the scene of carrying out of industrial personal computer Human-machine Control interface 3 uses its acquisition temperature
Degree and air speed data, and temperature and wind speed in bringing-up section are controlled according to the remote data of above-mentioned acquisition, when passing through bringing-up section
When interior anemobiagraph 6 detects that the wind speed in bringing-up section is too high or too low, warning note can be carried out by monitoring system, can be used
Temperature sensor 7 detects the temperature of the bringing-up section, and the temperature sensor is thermocouple or thermal resistance or other meets
The temp probe of condition, in addition, Field Force can also be arranged two in PLC2 by the Human-machine Control interface 3 of monitoring system
The control parameter of automatic controller, i.e., the controller parameter of described automatic controller one and automatic controller two.
Further, in order to enable wind speed and temperature meet control requirement simultaneously, and the control precision of temperature is protected
It holds sufficiently high, after above-mentioned steps S4, S5 is also comprised the steps of, for ensuring control of the automatic controller two to wind speed
Meet technique and requires (i.e. so that wind speed is kept in a certain range, such as 0.36m/s~0.54m/s)；
S5: a wind speed range is set according to the technological requirements, is detected in bringing-up section when by the anemobiagraph in bringing-up section
Wind speed it is too high or too low relative to the wind speed range when, then jump back to step S2, again by the temperature of the bringing-up section
It adjusts in the second preset range value.
It should be mentioned that the step of above-mentioned steps S5 is non-essential, under normal circumstances, the frequency of the secondary adjustment of blower
Change not too large, only the case where just will appear above-mentioned wind speed over range in a few cases (related with technique requirement).
According to field test it is found that can successfully make the bringing-up section of tunnel oven by above-mentioned temprature control method
Interior wind speed is maintained within the scope of 0.36m/s~0.54m/s, and bringing-up section temperature is controlled at ± 5 DEG C, when unloaded within ± 2 DEG C, and
It does not need to add excessive hardware cost.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of accurate temperature control method of tunnel oven bringing-up section disturbance rejection, the baking oven is interior to be equipped with blower and heating tube,
It is characterized in that, the temprature control method comprises the following steps:
S1: a fixation running frequency being manually arranged is given to open the blower, to carry out wind system circulation, is then opened
The heating tube is opened to heat the bringing-up section；
S2: detecting the temperature of the bringing-up section and is compared with preset temperature, and comparison result is sent to automatic controller
One；
S3: the automatic controller one automatically adjusts the output power of heating tube according to the comparison result, so that current adds
The temperature of hot arc makes the temperature of the current bringing-up section keep steady in the first preset range value close to preset temperature
Fixed, first preset range value refers to the control of bringing-up section temperature full load within ± 15 DEG C, and control is ± 10 when unloaded
Within DEG C；
S4: the running frequency of the blower is automatically adjusted to control air output size by automatic controller two, and is passed through simultaneously
The automatic controller one continues to automatically adjust the output power of heating tube, so that the temperature of the bringing-up section is in the second default model
It encloses and keeps stablizing in value, the second preset range value is less than first preset range value.
2. temprature control method according to claim 1, it is characterised in that: second preset range value refers to heating
Duan Wendu full load controls within ± 5 DEG C, and control is within ± 2 DEG C when unloaded.
3. temprature control method according to claim 1, which is characterized in that specifically use three-phase walk trigger and solid-state
Relay controls the output power of the heating tube.
4. temprature control method according to claim 1, which is characterized in that the blower carries out wind speed control using frequency converter
It makes, the fixed running frequency in step S1 is 35Hz-45Hz.
5. temprature control method according to claim 1, which is characterized in that the automatic controller one and automatic controller
Two be fuzzy controller, adaptive controller or PID controller.
6. temprature control method according to claim 5, which is characterized in that set by the Human-machine Control interface of monitoring system
Set the controller parameter of the automatic controller one and automatic controller two.
7. temprature control method according to claim 1, which is characterized in that also comprise the steps of S5；
S5: when detecting that the wind speed in bringing-up section is too high or too low by the anemobiagraph in bringing-up section, switch the blower
Running frequency jumps back to step S2, then to the fixed running frequency again to adjust the temperature of the bringing-up section second
In preset range value.
8. temprature control method according to claim 7, which is characterized in that detected when by the anemobiagraph in bringing-up section
When wind speed in bringing-up section is too high or too low, warning note can be carried out by monitoring system.
9. temprature control method according to claim 1, which is characterized in that detect the bringing-up section using temperature sensor
Temperature.
10. temprature control method according to claim 9, which is characterized in that the temperature sensor be thermocouple or
Thermal resistance.
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| CN201811352295.3A CN109539766B (en) | 2018-11-14 | 2018-11-14 | Anti-disturbance accurate temperature control method for heating section of tunnel oven |
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Cited By (1)
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|---|---|---|---|---|
| CN112611174A (en) * | 2020-11-30 | 2021-04-06 | 扬州大学 | Multi-energy complementary drying control system |
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|---|---|---|---|---|
| CN112611174A (en) * | 2020-11-30 | 2021-04-06 | 扬州大学 | Multi-energy complementary drying control system |
| CN112611174B (en) * | 2020-11-30 | 2022-10-11 | 扬州大学 | Multi-energy complementary drying control system |
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| CN109539766B (en) | 2020-11-10 |
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Application publication date: 20190329 Assignee: Changsha Pharmaceutical Equipment Industrial Technology Research Institute Co.,Ltd. Assignor: TRUKING TECHNOLOGY Ltd. Contract record no.: X2023980051833 Denomination of invention: A precise temperature control method for disturbance resistance in the heating section of a tunnel oven Granted publication date: 20201110 License type: Common License Record date: 20231213 |