CN1636898A - Temperature controller for explosion-proof glass processing furnace - Google Patents
Temperature controller for explosion-proof glass processing furnace Download PDFInfo
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- CN1636898A CN1636898A CN 200410089068 CN200410089068A CN1636898A CN 1636898 A CN1636898 A CN 1636898A CN 200410089068 CN200410089068 CN 200410089068 CN 200410089068 A CN200410089068 A CN 200410089068A CN 1636898 A CN1636898 A CN 1636898A
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- temperature
- explosion
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- processing furnace
- proof glass
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Abstract
The temperature controller for explosion-proof glass processing furnace includes hardware and software. The hardware includes computer, communication module connected to the serial port of the computer, digital quantity input module to receive fan air flow state parameters, digital quantity output module to output the heater and the fan on/off commands, analog quantity input module connected to the temperature sensors, and analog quantity output module connected to PID regulation controller. After inputting team number, heating time, temperature maintaining time and target temperature in the computer, the computer will control the temperature of the explosion-proof glass processing furnace automatically in temperature raising/lowering rate and temperature maintenance, with temperature error being controlled within 2 deg.c.
Description
Technical field
The present invention relates to a kind of device of controlling the explosion-proof glass processing furnace temperature.
Background technology
Be used for the explosion-proof furnace structure of processed glass at present, be generally blower fan and blow electric heating tube, come controlled temperature with secondary instrument, and with the temperature variation of walking in the master mode registering instrument record course of processing.Require that measurement point is many, temperature rate is controlled, all there is many inconvenience aspects such as the preservation of record and analysis.
Summary of the invention
The present invention is a kind of automatic control device that is used for explosion-proof furnace temperature, comprises hardware and software.Hardware has computer, digital quantity output load module, analog quantity output load module, temperature sensor, change-over relay, wind flow protector, over-temperature protection device, PID temperature control equipment etc., and software is installed in WINDOWS operating system.
Hardware is connected with a communication module by serial port by computer, communication module and digital quantity input module, the digital quantity output module, the analog quantity load module, analog output module connects, this device is connected with a communication module by serial port by computer, communication module and digital quantity input module, the digital quantity output module, the analog quantity load module, analog output module connects, the analog quantity load module is connected with each point for measuring temperature transmitter, analog output module is connected with the PID adjustment control, digital quantity input module receives the wind flow state parameter of fan pressure transmitter, the digital quantity output module, output adds the instruction of holding device and fan starting or stopping;
The control circuit for heater design has wind flow control loop and thermal-shutdown circuit, and temperature parameter feeds back to computer after being received by digital quantity input module and analog quantity load module respectively in wind flow state parameter and the stove;
Each point for measuring temperature transmitter is six glass surface temperature sensors, organize heating tube temperature sensor and control loop temperature sensor more;
Software programming is explosion-proof stove program, and the algorithm of this program is:
1, it is working properly not to detect each module;
2, input teams and groups numbering, warm-up time, soaking time and target temperature;
3, send sign on;
4, detect blower fan, whether wind flow normal, whether excess temperature?
5, if blower fan, wind flow is undesired or excess temperature, then disconnects and add thermo-relay work loop and report to the police;
6, if step 5 is all normal, then get temperature in the stove, the theoretical curve that calculates and draw, according to curve section preferred temperature section, the group number of determining to heat begins to heat;
Does 7, preferred temperature reach not?
8, if reach preferred temperature and working hour (warm-up time+soaking time), order blower fan time-delay 30 minutes;
9, if do not reach preferred temperature and working hour (warm-up time+soaking time), then continue to heat.
Described temperature section and processing group number, be with some heating tubes in the pot arch, be divided into some groups, every group of corresponding temperature section, according to preferred temperature, the group number of the electrothermal tube of determining to heat, and control contactor is connected heating tube, if be defined as heating last group electrothermal tube, then start controllable silicon regulator, heat last group electrothermal tube;
Described theoretical curve is target temperature, the heating-up time according to input, the temperature-time curve that draws.
Advantage of the present invention is, under the situation of fully loaded glass, both can heat up rapidly and uniformly in meter high body of heater of meter wide * 4,5.1 meters long * 2.8, also can change according to processing requirement heat up, the speed of insulation and cooling, temperature error is controlled in 2 ℃.
Description of drawings
Accompanying drawing 1 is a skeleton diagram of the present invention.
Accompanying drawing 2 is each point for measuring temperature of explosion-proof stove, blower fan air-supply and 13 groups of electric heating tube schematic layout patterns.
Accompanying drawing 3 is explosion-proof stove sequence of control schemas.
Accompanying drawing 4 is wind flow control loop skeleton diagrams.
Accompanying drawing 5 is thermal-shutdown circuit skeleton diagrams.
Accompanying drawing 6 is driving circuit skeleton diagrams
Embodiment
See also shown in the accompanying drawing 1, computer is by the R232 serial port, and ICP7520 is connected with communication module, and all modules couple together with the RS-485 network, and communication module ICP7520 is used for the conversion of signal standards current potential;
Digital quantity input/output module (ICP7065D): the digital I/O of unlike signal and type is provided;
Analog quantity load module ICP7018, extraneous simulating signal extracts by module, can measure the numerical value of temperature sensor, obtains Temperature numerical; Analog output module ICP7024, output voltage or electric current promote device start or close by driving circuit (seeing accompanying drawing 6).
The order that main control computer sends is gone by the output of RS-232 communication port, after the modular converter of this signal process RS-232/RS-485 carries out signal potential and type conversion, propagate at the RS-485 network, after module is received the order of self module, the analysis of controlling is also delivered to the RS-485 network again with the result, this signal can be received by the RS-232 serial port of computer again through after the ICP7520 conversion.
By keyboard input target temperature, heating-up time, soaking time, software system promptly can be illustrated in the intensification and the insulating process of expectation on the computer display screen, after pressing start key, the process monitoring data in the entire work process are illustrated on the screen with numeral and diagramatic way.
Computer obtains promptly many group heating tube temperature sensors of two room temps parameters and control loop temperature sensor parameter by analog-to-digital conversion module, and the digital data of six glass surface hygrosensors, controls the heated condition of 13 groups of heating tubes.
Quick in order to ensure heating in the stove, steady, work out a kind of 13 sections intensifications and preservation and controlling method:
Working temperature in the explosion-proof stove is generally normal temperature to 300 ℃, owing to the stopping property of explosion-proof stove, heat radiation reason in the process of whole heating, the increase of temperature and needed heat are not linear relationships, design each temperature section according to practical situation thus and use different heating powers, be about to 138, every is that 2 kilowatts electric heating tube is divided into 13 groups altogether, every group of corresponding temperature section, and concrete is assigned as:
Group number heating power corresponding temperature section control method
19 * 2KW T 30 with contactor
29 * 2KW, 30＜T＜=60 contactors
39 * 2KW, 60＜T＜=90 contactors
49 * 2KW, 90＜T＜=120 contactors
59 * 2KW, 120＜T＜=150 contactors
69 * 2KW, 150＜T＜=180 contactors
79 * 2KW, 180＜T＜=200 contactors
8 12 * 2KW, 200＜T＜=220 contactors
9 12 * 2KW, 220＜T＜=240 contactors
10 12 * 2KW, 240＜T＜=260 contactors
11 12 * 2KW, 260＜T＜=280 contactors
12 12 * 2KW, 280＜T＜=300 contactors
13 15 * 2KW, 300＜T＜=350 silicon controlled power modulation devices
Because the electric heating tube structure is that nichrome wire places in the stainless steel tube, fills silica powder therebetween and insulate.So have " thermal hysteresis " effect when energising heating and outage cooling, promptly temperature can not raise at once, necessary heating silica powder, the stainless steel tube by silica powder reheat outside brings processed glass through recirculating air with heat then.Otherwise during the outage cooling, the heat of heating tube also takes time and leaves.This " thermal hysteresis " effect brings great inconvenience for the accurate control of temperature.Through calculating and actual the adjustment, 13 groups of heating methods have been used for this reason." design temperature ", " heating-up time " according to input calculate theoretic curve, and program is chosen heating group, decision heated condition according to the temperature value (preferred temperature) of a certain period on the curve.
For improving control accuracy, adopted " trend determining method ", promptly to compare with the variable quantity of actual temperature with the preferred temperature increment in the unit time, the trend of judgement temperature variation is controlled the real work quantity of electric heating tube, reaches control accuracy ± 1 ℃.
Two room temps transmitters, one is to survey daily controlled temperature, and another is the temperature parameter Access Control loop that will survey, uses as reporting to the police, when the temperature that detects when the former surpasses the warning temperature, send chimes of doom and cut off the control loop of electric heating tube.Wind flow protection, overheat protector, interlock guarantee equipment safety operation, and safety precaution mechanism guarantees operator safety production.
Computer obtains the temperature parameter of six glass surface temperature sensors by analog-to-digital conversion module ICP7018, and each the air outlet open degree that is used to regulate the air quantity diversion chamber arrives the air quantity of glass surface with control.
Because explosion-proof furnaceman's skill requires higher to the temperature accuracy of holding-zone relatively, and can only make electric heating tube be in heating with full power state or heated condition not with contactor control prosecutor formula, temperature-controlled precision is poor, so adopt pid control law, promptly the 13rd group of electric heating tube group heated with the control of silicon controlled power modulation device, when temperature in the body of heater arrives high design temperature and enters holding stage, lifting trend with " trend determining method " analysis temperature, produce the control corresponding data, machine RS-232 serial ports is transported to analog output module ICP7024 as calculated, produce the 0-10VDC voltage analog signal at its delivery port, the silicon controlled power modulation device is according to the corresponding conduction angle of this unblanking silicon controlled rectifier, the heating current of control electrothermal tube finally makes the 13rd group of electric heating tube reach accurate controlled temperature purpose.
The electric heating tube that explosion-proof stove is used must have enough air quantity its surperficial heat that leaves in the normal heating process; in the circuit of control heating, designed an air quantity control loop for this reason; when the recirculating air in the stove because motor and other reasons when causing that air quantity does not reach service requirements; cut off the control power supply of the contactor of control heating tube; stop power supply, reach the purpose of protection heating tube electric heating tube.And the excess temperature that causes for fear of the fault of rly. and communication module; in the The whole control circuit, designed special-purpose thermal-shutdown circuit again; temperature surpasses the current supply circuit that the warning temperature then disconnects heating tube in stove, plays the purpose of protection converted products and equipment.
In computer, set up database file, order of classes or grades at school according to input, automatically generate the database file that comprises date and order of classes or grades at school, the temperature regime of each temperature detecting point of real time record, make things convenient for data filing and after on this machine or other computer, analyze and search.
Claims (6)
1. temperature controller for explosion-proof glass processing furnace, it is characterized in that: this device is connected with a communication module by serial port by computer, communication module is connected with digital quantity input module, digital quantity output module, analog quantity load module, analog output module, the analog quantity load module is connected with each point for measuring temperature transmitter, analog output module is connected with the PID adjustment control, digital quantity input module receives the wind flow state parameter of fan pressure transmitter, the digital quantity output module, output adds the instruction of holding device and fan starting or stopping.
2. the described temperature controller for explosion-proof glass processing furnace of claim 1; it is characterized in that: the control circuit for heater design has wind flow control loop and thermal-shutdown circuit, and temperature parameter returns the computer of feeding after being received by digital quantity input module and analog quantity load module respectively in wind flow state parameter and the stove.
3. by the described temperature controller for explosion-proof glass processing furnace of claim 1, it is characterized in that: each point for measuring temperature transmitter is six glass surface temperature sensors, organize heating tube temperature sensor and Access Control loop temperature transmitter more.
4. explosion-proof glass processing furnace temperature control method, it is characterized in that: the step of computer control temperature is:
1, it is working properly not to detect each module;
2, input teams and groups numbering, warm-up time, soaking time and target temperature;
3, send sign on;
4, detect blower fan, whether wind flow normal, whether excess temperature?
5, if blower fan, wind flow is undesired or excess temperature, then report to the police;
6, if step 5 is all normal, then get temperature in the stove, the theoretical curve that calculates and draw, according to curve section preferred temperature section, the group number of determining to heat begins to heat;
Does 7, preferred temperature reach not?
8, if reach preferred temperature and working hour, order blower fan time-delay 30 minutes;
9, if do not reach preferred temperature and working hour, then continue to heat.
5. by the described explosion-proof glass processing furnace temperature of claim 4 control method, it is characterized in that: described temperature section and processing group number, be with some heating tubes in the pot arch, be divided into some groups, every group of corresponding temperature section, according to preferred temperature, determine the to heat group number of electrothermal tube, and control contactor connects heating tube, if be defined as heating last group electrothermal tube, then start controllable silicon regulator, heat last group electrothermal tube.
6. by the described explosion-proof glass processing furnace temperature of claim 4 control method, it is characterized in that: described theoretical curve is target temperature, the heating-up time according to input, the temperature-time curve that draws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410089068 CN1290781C (en) | 2004-12-03 | 2004-12-03 | Temperature controller for explosion-proof glass processing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410089068 CN1290781C (en) | 2004-12-03 | 2004-12-03 | Temperature controller for explosion-proof glass processing furnace |
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| CN1636898A true CN1636898A (en) | 2005-07-13 |
| CN1290781C CN1290781C (en) | 2006-12-20 |
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| CN 200410089068 Active CN1290781C (en) | 2004-12-03 | 2004-12-03 | Temperature controller for explosion-proof glass processing furnace |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759936A (en) * | 2012-07-30 | 2012-10-31 | 彩虹显示器件股份有限公司 | Temperature control method for glass tank |
| CN102968141A (en) * | 2012-11-28 | 2013-03-13 | 东莞市科力钢铁线材有限公司 | Novel temperature control device and application method thereof |
| CN103542531A (en) * | 2012-07-12 | 2014-01-29 | 珠海格力电器股份有限公司 | Electric heater with fan, control method and circuit thereof and domestic appliance |
| CN113929281A (en) * | 2021-11-23 | 2022-01-14 | 蚌埠凯盛工程技术有限公司 | Temperature control method and system for platinum channel in float process |
| CN114060892A (en) * | 2021-11-29 | 2022-02-18 | 奥普家居股份有限公司 | Constant-temperature bathroom heater, control method thereof and storage medium |
| CN114455817A (en) * | 2021-04-13 | 2022-05-10 | 杭州欣海卫浴有限公司 | Temperature monitoring system of glass hot bending furnace |
-
2004
- 2004-12-03 CN CN 200410089068 patent/CN1290781C/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542531A (en) * | 2012-07-12 | 2014-01-29 | 珠海格力电器股份有限公司 | Electric heater with fan, control method and circuit thereof and domestic appliance |
| CN103542531B (en) * | 2012-07-12 | 2016-04-06 | 珠海格力电器股份有限公司 | Electric heater with blower fan and control method thereof and circuit and household electrical appliance |
| CN102759936A (en) * | 2012-07-30 | 2012-10-31 | 彩虹显示器件股份有限公司 | Temperature control method for glass tank |
| CN102968141A (en) * | 2012-11-28 | 2013-03-13 | 东莞市科力钢铁线材有限公司 | Novel temperature control device and application method thereof |
| CN102968141B (en) * | 2012-11-28 | 2015-07-01 | 东莞市科力钢铁线材有限公司 | Novel temperature control device and application method thereof |
| CN114455817A (en) * | 2021-04-13 | 2022-05-10 | 杭州欣海卫浴有限公司 | Temperature monitoring system of glass hot bending furnace |
| CN114455817B (en) * | 2021-04-13 | 2023-10-31 | 杭州欣海卫浴有限公司 | Glass hot bending furnace temperature monitoring system |
| CN113929281A (en) * | 2021-11-23 | 2022-01-14 | 蚌埠凯盛工程技术有限公司 | Temperature control method and system for platinum channel in float process |
| CN113929281B (en) * | 2021-11-23 | 2023-07-25 | 蚌埠凯盛工程技术有限公司 | Temperature control method and system for platinum channel in float process |
| CN114060892A (en) * | 2021-11-29 | 2022-02-18 | 奥普家居股份有限公司 | Constant-temperature bathroom heater, control method thereof and storage medium |
| CN114060892B (en) * | 2021-11-29 | 2023-05-16 | 奥普家居股份有限公司 | Constant-temperature bathroom heater, control method thereof and storage medium |
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| Publication number | Publication date |
|---|---|
| CN1290781C (en) | 2006-12-20 |
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Owner name: YAOPI ENGINEERING GLASS CO., LTD., SHANGHAI Effective date: 20130828 Owner name: SHANGHAI YAOHUA PILKINGTON GLASS GROUP CO., LTD. Free format text: FORMER OWNER: YAOHUA-PIERJINDUN GLASS CO LTD, SHANGHAI Effective date: 20130828 |
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Free format text: CORRECT: ADDRESS; FROM: 200126 PUDONG NEW AREA, SHANGHAI TO: 201204 PUDONG NEW AREA, SHANGHAI |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130828 Address after: 201204 Shanghai city Pudong New Area Lianxi Road No. 1210 Building No. 1 Patentee after: Shanghai Yaopi Glass Group Co.,Ltd. Patentee after: Yaopi Engineering Glass Co., Ltd., Shanghai Address before: 200126 No. 100, Jiyang Road, Shanghai, Pudong New Area Patentee before: Yaohua-Pierjindun Glass Co., Ltd., Shanghai |