CN102927830A - Measurement and control system with discriminative tracking for temperature of high-temperature resistance furnace and monitoring method thereof - Google Patents
Measurement and control system with discriminative tracking for temperature of high-temperature resistance furnace and monitoring method thereof Download PDFInfo
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- CN102927830A CN102927830A CN2012104302209A CN201210430220A CN102927830A CN 102927830 A CN102927830 A CN 102927830A CN 2012104302209 A CN2012104302209 A CN 2012104302209A CN 201210430220 A CN201210430220 A CN 201210430220A CN 102927830 A CN102927830 A CN 102927830A
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Abstract
The invention relates to a measurement and control system with discriminative tracking for the temperature of a high-temperature resistance furnace and a monitoring method thereof. The invention comprises the following steps: symmetrically and uniformly dividing a heating space of a hearth of the high-temperature resistance furnace into a plurality of heating subareas, arranging a resistance heating element in each subarea, and arranging a main loop unit of a heating power supply, a high and low temperature discriminative measuring and transmitting unit, and a high and low temperature control loop unit in each heating subarea in a matching way. The high and low temperature discriminative measuring and collecting mode of the measurement and control system overcomes the defect that wiring and signal types cannot be complementary to each other caused by different signal types of high and low temperature measurement in instrument control, and by using an undisturbed switching method with a threshold value, a power regulator can smoothly and continuously output control signals in high and low temperature switching so as to eliminate mutations, jumps and discontinuity of the control output due to different temperature measurement means and ranges for high and low temperatures, and improve the accuracy and reliability of single-area temperature control.
Description
Technical field
The present invention relates to a kind of high temperature resistance furnace temperature difference tracking telemetering and control system and method for supervising thereof.
Background technology
High temperature resistance furnace is different from conventional resistance furnace, usually with composites such as graphite as calandria, the fire-resistant high-temperature energy-conservation material of Ultralight is as furnace lining, matched with vacuum, water-cooled and temperature control system, realize more than 1700 ℃, maximum temperature can reach 3000 ℃ heating and heat treatment production process, is widely used in the fields such as space flight, machinery, manufacturing, new material.
Existing most of high temperature resistance furnace temperature-controlling system is subjected to the restriction of the factors such as high low temperature temperature sensing means and signal type, directly adopt the high-temperature measurement meter to carry out temperature control, the programming rate of centering low-temperature zone and power stage can not be accomplished accurately in real time control, particularly to the production heat treatment of the new materials such as carbon composite, fire-resistant composite fibre, affect effective enforcement of thermal treatment production process process.In addition, a plurality of heating subregions are independently controlled in the stove, and the temperature control synchronous coordination is relatively poor, and the control system hardware cost is higher, and the system maintenance work amount is larger.
Summary of the invention
Technical problem solved by the invention provides a kind of the switching by high low temperature unperturbed and realizes that omnidistance temperature accurately controls, the temperature of a plurality of heating subregions can the synchronized Coordinative Control, temperature homogeneity is good in the stove, the control loop hardware cost is cheap, and working service is high temperature resistance furnace temperature difference tracking telemetering and control system and method for supervising thereof simply and easily.
For solving above-mentioned technical problem, the technical scheme that the present invention takes:
A kind of high temperature resistance furnace temperature difference tracking telemetering and control system, its special character is: comprise high temperature resistance furnace burner hearth heating space symmetry is divided into several heating subregions in uniform way, be provided with stratie in each heating subregion, the supporting heating power supply main loop unit of each heating subregion, high low-temperature space are not measured transducing unit, height temperature control circuit units; The heating power supply main loop unit mainly comprises heating power supply, low tension switch protection electrical equipment, power regulator, and heating power supply is connected with stratie in heating subregion through power regulator; High low-temperature space is not measured transducing unit and is comprised high-temperature measurement meter and movable thermocouple, high-temperature measurement meter and movable thermocouple all are arranged in each heating subregion, the high-temperature measurement meter connects the high-temperature control instrument, movable thermocouple connects the cycostat controller table, high-temperature control instrument between several heating subregions interconnects, and the cycostat controller table interconnects; Height temperature control circuit units comprises high-temperature control output loop and low temperature output control loop, the high-temperature control instrument, cycostat controller table that high low-temperature space is not measured transducing unit is respectively through the control signal receiving terminal sub-connection of the power regulator of high-temperature control output loop, low temperature output control loop and heating power supply main loop unit, be provided with change-over switch between high-temperature control output loop and the power regulator, be provided with change-over switch between low temperature output control loop and the power regulator.
The high-temperature control instrument of any one heating subregion adopts the high temperature master instrument in several above-mentioned heating subregions, the cycostat controller table adopts the low temperature master instrument, the high-temperature control instrument of other heating subregion adopts high temperature to follow instrument, and the cycostat controller table adopts low temperature to follow instrument.
High-temperature control instrument between several above-mentioned heating subregions becomes by RS485 PORT COM or 0-5VDC simulation send electric interfaces to connect, and the cycostat controller table is simulated to become by RS485 PORT COM 0-5VDC and sent electric interfaces to connect.
The method for supervising of said system is to the same heating subregion of high temperature resistance furnace high temperature, low temperature is implemented difference and is measured, the strategy of independent control, the principal and subordinate who carries out respectively hot stage and low thermophase again between a plurality of different heating subregions of high temperature resistance furnace follows control, each heats high temperature master instrument corresponding to subregion and collaborative other high temperature of low temperature master instrument follows the tracks of temperature control instrument and low temperature is followed the tracks of temperature control instrument, according to unified heating process curve, by the high low temperature switching signal of same heating subregion, the unperturbed that carries out high-temperature control output loop and low temperature output control loop switches, and realizes that respectively a plurality of heating divide the coordinating and unifying control of low temp area and hot stage.
Compared with prior art, beneficial effect of the present invention:
Different and the wiring that causes and signal type of high temperature low-temperature measurement signal type can not complementary defective when high low-temperature space of the present invention was measured and overcome instrument control with the pattern that gathers, and make power regulator when high low temperature switches, can smoothly export continuously control signal by the unperturbed changing method with threshold value, eliminated that high low temperature jumps because of the control output mutation of temperature sensing means appearance different from range and discontinuous, improved single district temperature control accuracy and reliability; When large the and heating subregion of furnace cavity size is more, multi-region principal and subordinate coordinates the temperature control independent temperature control in single district of comparing, can make temperature control harmony and the synchronism of a plurality of heating subregions better, be conducive to the raising of temperature uniformity, and the hardware cost of control loop reduce greatly.
Description of drawings
Fig. 1 is connection block diagram of the present invention.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1, the present invention includes high temperature resistance furnace burner hearth heating space symmetry is divided into several heating subregions in uniform way, be provided with stratie 1 in each heating subregion, the supporting heating power supply main loop unit 2 of each heating subregion, high low-temperature space are not measured transducing unit 3, height temperature control circuit units 4 etc. and are partly realized heating function; Heating power supply main loop unit 2 mainly comprises heating power supply, low tension switch protection electrical equipment, power regulator, and heating power supply is connected with stratie 1 in heating subregion through power regulator; High low-temperature space is not measured transducing unit 3 and is comprised high-temperature measurement meter and movable thermocouple, high-temperature measurement meter and movable thermocouple all are arranged in each heating subregion, the high-temperature measurement meter connects high-temperature control instrument 6, movable thermocouple connects cycostat controller table 5, high-temperature control instrument 6 between several heating subregions interconnects, and cycostat controller table 5 interconnects; Height temperature control circuit units 4 comprises high-temperature control output loop and low temperature output control loop, the high-temperature control instrument 6, cycostat controller table 5 that high low-temperature space is not measured transducing unit 3 is respectively through the control signal receiving terminal sub-connection of the power regulator of high-temperature control output loop, low temperature output control loop and heating power supply main loop unit 2, be provided with change-over switch between high-temperature control output loop and the power regulator, be provided with change-over switch between low temperature output control loop and the power regulator.
Power governor is the core devices in heating power supply loop, can select the INJET three-phase digital power regulator with communication function, carries out communication with PLC and computer supervisory control system, and the electrical quantity in the heating process is carried out Real-Time Monitoring and record.
The high-temperature control instrument 6 of any one heating subregion adopts the high temperature master instrument in several above-mentioned heating subregions, cycostat controller table 5 adopts the low temperature master instrument, the high-temperature control instrument 6 of other heating subregion adopts high temperature to follow instrument, and cycostat controller table 5 adopts low temperature to follow instrument.
High-temperature control instrument 6 between several above-mentioned heating subregions becomes by RS485 PORT COM or 0-5VDC simulation send electric interfaces to connect, and cycostat controller table 5 is simulated to become by RS485 PORT COM 0-5VDC and sent electric interfaces to connect.
The control method of said system is to the same heating subregion of high temperature resistance furnace high temperature, low temperature is implemented difference and is measured, the strategy of independent control, the principal and subordinate who carries out respectively hot stage and low thermophase again between a plurality of different heating subregions of high temperature resistance furnace follows control, the collaborative high temperature of the high temperature master instrument of each subregion and low temperature master instrument follows the tracks of temperature control instrument and low temperature is followed the tracks of temperature control instrument, according to unified heating process curve, by the high low temperature switching signal of same heating subregion, the unperturbed that carries out high-temperature control output loop and low temperature output control loop switches, and realizes that respectively a plurality of heating divide the coordinating and unifying control of low temp area and hot stage.
Embodiment 1:
The present invention includes symmetry in the high temperature resistance furnace stove is divided into two heating subregions in uniform way, be provided with stratie 1 in each heating subregion, each heating subregion is provided with heating power supply main loop unit 2, high low-temperature space is not measured transducing unit 3, height temperature control circuit units 4; Heating power supply main loop unit 2 comprises heating power supply, low tension switch protection electrical equipment, power regulator, and heating power supply is connected with resistance heating body 1 in heating subregion through power regulator; High low-temperature space divides measurement transducing unit 3 to comprise high-temperature measurement meter and movable thermocouple, high-temperature measurement meter and movable thermocouple all are arranged in the heating subregion, the high-temperature measurement meter connects high-temperature control instrument 6, movable thermocouple connects cycostat controller table 5, two high-temperature control instrument 6 that heat between the subregion interconnect, and cycostat controller table 5 interconnects; Height temperature control circuit units 4 comprises high-temperature control output loop and low temperature output control loop, high-temperature control instrument 6, cycostat controller table 5 that high low-temperature space is not measured transducing unit 3 are connected with the power regulator of heating power supply main loop unit 2 through high-temperature control output loop, low temperature output control loop respectively, be provided with change-over switch between high-temperature control output loop and the power regulator, be provided with change-over switch between low temperature output control loop and the power regulator.
Any one heats the high-temperature control instrument 6 employing high temperature master instruments of subregion in two heating subregions, cycostat controller table 5 adopts the low temperature master instrument, the high-temperature control instrument 6 of other heating subregions adopts high temperature to follow instrument, and cycostat controller table 5 adopts low temperature to follow instrument.
High-temperature control instrument 6 between several above-mentioned heating subregions connects by RS485 PORT COM or 0-5VDC electric signal, and cycostat controller table 5 connects by RS485 PORT COM or 0-5VDC electric signal.
The control method of said system is implemented the difference measurement to high temperature resistance furnace same heating subregion high temperature and low thermophase, the strategy of independent control, the principal and subordinate who carries out respectively hot stage and low thermophase again between a plurality of different heating subregions of high temperature resistance furnace follows control, the collaborative high temperature of the high temperature master instrument of each subregion and low temperature master instrument follows the tracks of temperature control instrument and low temperature is followed the tracks of temperature control instrument, according to unified heating process curve, by the high low temperature switching signal of same heating subregion, the unperturbed that carries out high-temperature control output loop and low temperature output control loop switches, and realizes that respectively a plurality of heating divide the coordinating and unifying control of low temp area and hot stage.
The said system control method realizes two thermals treatment zone in described 1 district and 2 districts, 1 district follows control as master control thermal treatment zone traction 2 districts, and the pattern of following the tracks of according to high temperature, low temperature principal and subordinate is respectively carried out the synchronized Coordinative Control to two heating subregion temperature in the stove by the same temperature process curve.Adopt definite value temperature controller with precision of master control temperature controller traction of a multisegment, high temperature master instrument and trace meter are defined as respectively FP23_H and SR23_H, and low temperature master instrument and trace meter are defined as respectively FP23_L and SR23_L.During hot stage, the mode traction SR23_H that FP23_H now connects by communication or signal carries out high temperature and unifies Collaborative Control control; During low thermophase, the mode traction SR23_L that FP23_L now connects by communication or signal carries out low temperature and unifies Collaborative Control control.The master control temperature control instrument can be selected 0.1 grade of INTELLIGENT PID REGULATOR of Japanese island electricity FP23 series multisegment, follow the tracks of temperature control instrument and select day 0.1 grade of INTELLIGENT PID REGULATOR of island proper electricity SR23 series, simulate output function and follow the tracks of the temperature Collaborative Control that temperature control instrument is realized two heating subregions by the master control temperature control instrument.
The high-temperature measurement meter can be selected the non-contact temperature measuring devices such as two color comparator pyrometers, three coloured light electricity high-temperature measurement instrument, infrared temperature instrument, range is between 500-3000 ℃, the 24VDC power supply for being fit to the input of temperature control instrument signal and signal transmitting, is selected the 4-20mA standard current signal.
Middle low-temperature zone detects the movable thermocouple of apolegamy and measures, when temperature uniformity is had relatively high expectations, supporting corresponding recirculated cooling water device, and install cylinder movement device and thermometer hole covering device additional, before temperature arrives high temperature section, extract thermocouple out by high low temperature inversion temperature point switching signal control cylinder, and make covering device cover thermometer hole to reduce leakage heat.Movable thermocouple is selected suitable length according to situation in the burner hearth, and range and signal type and low temperature temperature controller are complementary.
The double loop control model that the control method of said system adopts high low temperature unperturbed to switch, it is the pattern that temperature detection and temperature control instrument switch by high low temperature, divide into high-temperature control output loop and low temperature output control loop, temperature process curve according to the coordinating and unifying, acting in conjunction is regulated the power stage of heating power supply in real time in the power governor (SCR) of heating major loop.Realize the temperature controller of high-temperature control output, needing to select input signal is the omnipotent standard signal of 4-20mA or 1-5V, in the convenient current signal that receives high-temperature measurement, realize the cycostat controller table of low temperature control output, the thermocouple signal of input selection acquiescence gets final product.
The signal of the change-over switch of the control method of said system is provided by a pair of normally-open normally-close signal of auxiliary reclay, be serially connected with respectively high temperature, the low temperature output control loop, alert event output is set respectively on each heating high-temperature control instrument of subregion and low temperature temperature controller, with a certain temperature value that is lower than movable thermocouple range Near The Upper Limit (such as 900 ℃, 1000 ℃, 1100 ℃ etc., select suitable value according to concrete technology) as high low temperature handover event alarming value, judge by logical program, when the alert event condition of two instrument satisfies simultaneously, the auxiliary reclay coil is charged, drive the action of switching controls relay contact, realize the unperturbed handoff functionality of height temperature control.
The setting of the described temperature process curve of the control method of said system can be by the guidance panel key-press input of master control temperature controller, or the mode of instrument and computer communication, by configuration software man-machine interface design temperature curve.The process curve of middle low-temperature zone (the movable the highest thermometric temperature of thermocouple is following) is input to low temperature master control temperature controller, the whole piece process curve intactly is input to high temperature master control temperature controller as far as possible, by high low temperature unperturbed change-over switch, realize that whole heating process carries out coordinating and unifying control according to the same temperature process curve.
Claims (4)
1. a high temperature resistance furnace temperature is distinguished tracking telemetering and control system, it is characterized in that: comprise high temperature resistance furnace burner hearth heating space symmetry is divided into several heating subregions in uniform way, be provided with stratie (1) in each heating subregion, each heating supporting heating power supply main loop unit of subregion (2), high low-temperature space are not measured transducing unit (3), height temperature control circuit units (4); Heating power supply main loop unit (2) mainly comprises heating power supply, low tension switch protection electrical equipment, power regulator, and heating power supply is connected with stratie (1) in heating subregion through power regulator; High low-temperature space is not measured transducing unit (3) and is comprised high-temperature measurement meter and movable thermocouple, high-temperature measurement meter and movable thermocouple all are arranged in each heating subregion, the high-temperature measurement meter connects high-temperature control instrument (6), movable thermocouple connects cycostat controller table (5), high-temperature control instrument (6) between several heating subregions interconnects, and cycostat controller table (5) interconnects; Height temperature control circuit units (4) comprises high-temperature control output loop and low temperature output control loop, the high-temperature control instrument (6), cycostat controller table (5) that high low-temperature space is not measured transducing unit (3) is respectively through the control signal receiving terminal sub-connection of the power regulator of high-temperature control output loop, low temperature output control loop and heating power supply main loop unit (2), be provided with change-over switch between high-temperature control output loop and the power regulator, be provided with change-over switch between low temperature output control loop and the power regulator.
2. high temperature resistance furnace temperature according to claim 1 is distinguished tracking telemetering and control system, it is characterized in that: the high-temperature control instrument (6) of any one heating subregion adopts the high temperature master instrument in described several heating subregions, cycostat controller table (5) adopts the low temperature master instrument, the high-temperature control instrument (6) of other heating subregion adopts high temperature to follow instrument, and cycostat controller table (5) adopts low temperature to follow instrument.
3. high temperature resistance furnace temperature according to claim 1 and 2 is distinguished tracking telemetering and control system, it is characterized in that: the high-temperature control instrument (6) between described several heating subregions becomes by RS485 PORT COM or 0-5VDC simulation send electric interfaces to connect, and cycostat controller table (5) is simulated to become by RS485 PORT COM 0-5VDC and sent electric interfaces to connect.
4. high temperature resistance furnace temperature according to claim 3 is distinguished the method for supervising of tracking telemetering and control system, it is characterized in that: to the same heating subregion of high temperature resistance furnace high temperature, low temperature is implemented difference and is measured, the strategy of independent control, the principal and subordinate who carries out respectively hot stage and low thermophase again between a plurality of different heating subregions of high temperature resistance furnace follows control, each heats high temperature master instrument corresponding to subregion and collaborative other high temperature of low temperature master instrument follows the tracks of temperature control instrument and low temperature is followed the tracks of temperature control instrument, according to unified heating process curve, by the high low temperature switching signal of same heating subregion, the unperturbed that carries out high-temperature control output loop and low temperature output control loop switches, and realizes that respectively a plurality of heating divide the coordinating and unifying control of low temp area and hot stage.
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Cited By (7)
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| CN103336541A (en) * | 2013-06-27 | 2013-10-02 | 西安电炉研究所有限公司 | Temperature tracking protection control system for hot wind heating test device and control method thereof |
| CN104635805A (en) * | 2014-12-24 | 2015-05-20 | 湖南顶立科技有限公司 | Temperature control system |
| CN107145174A (en) * | 2017-04-27 | 2017-09-08 | 江苏石川岛丰东真空技术有限公司 | One kind heat treatment vacuum drying oven zone temperature control system |
| CN109489419A (en) * | 2018-11-27 | 2019-03-19 | 湖南顶立科技有限公司 | A kind of intermediate frequency furnace |
| CN112512146A (en) * | 2020-12-04 | 2021-03-16 | 深圳市拉普拉斯能源技术有限公司 | Asymmetric wire winding structure and thermal field temperature control method |
| CN112747603A (en) * | 2020-12-04 | 2021-05-04 | 深圳市拉普拉斯能源技术有限公司 | Wire winding structure and thermal field temperature control method |
| CN114101311A (en) * | 2021-11-09 | 2022-03-01 | 江苏山水国土资源开发工程有限公司 | Chemical oxidation and temperature rise coupled soil remediation method and system |
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| CN103336541A (en) * | 2013-06-27 | 2013-10-02 | 西安电炉研究所有限公司 | Temperature tracking protection control system for hot wind heating test device and control method thereof |
| CN103336541B (en) * | 2013-06-27 | 2015-08-26 | 西安电炉研究所有限公司 | Hot-blast Heating test unit temperature track protection control system and control method thereof |
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| CN109489419A (en) * | 2018-11-27 | 2019-03-19 | 湖南顶立科技有限公司 | A kind of intermediate frequency furnace |
| CN112512146A (en) * | 2020-12-04 | 2021-03-16 | 深圳市拉普拉斯能源技术有限公司 | Asymmetric wire winding structure and thermal field temperature control method |
| CN112747603A (en) * | 2020-12-04 | 2021-05-04 | 深圳市拉普拉斯能源技术有限公司 | Wire winding structure and thermal field temperature control method |
| CN112512146B (en) * | 2020-12-04 | 2023-02-10 | 深圳市拉普拉斯能源技术有限公司 | Thermal field temperature control method |
| CN114101311A (en) * | 2021-11-09 | 2022-03-01 | 江苏山水国土资源开发工程有限公司 | Chemical oxidation and temperature rise coupled soil remediation method and system |
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