CN202717834U - Carbon potential control system - Google Patents
Carbon potential control system Download PDFInfo
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- CN202717834U CN202717834U CN 201220406378 CN201220406378U CN202717834U CN 202717834 U CN202717834 U CN 202717834U CN 201220406378 CN201220406378 CN 201220406378 CN 201220406378 U CN201220406378 U CN 201220406378U CN 202717834 U CN202717834 U CN 202717834U
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Abstract
A carbon potential control system comprises a human-computer interface, a master controller, a carbon monoxide sensor, a carbon dioxide sensor, a temperature sensor, a oxygen content sensor, an ammonia gas flow controller, an electric power regulator and a carburization control valve. An input end of the master controller is respectively connected with the carbon monoxide sensor, the carbon dioxide sensor, the temperature sensor and the oxygen content sensor which are arranged in a furnace body. An output end of the master controller is respectively connected with the ammonia gas flow controller, the electric power regulator and a controller. The human-computer interface is connected with the master controller through a communication port. According to the carbon potential control system, a carbon potential computing unit two is added so that surface features of carbon potential are more accurate and reliable; and measurement of carbon monoxide partial pressure values is added so that the computing of the carbon potential is more precise, and control precision is higher.
Description
Technical field
The utility model relates to a kind of operating device commonly used---carbon potential control system of metallic substance equipment for Heating Processing.
Background technology
Carbon potential is the thermodynamic behaviour of atmosphere, in metal (steel) thermal treatment process, and under certain Heating temperature, the ability that the carbon content in the gac atom that provides in the gas phase of atmosphere and the steel surface austenite balances each other; In the production of various steel work, for guaranteeing hardness and the toughness of product, must make steel work from table to the certain carbon atom density of inner maintenance.The target that carbon-potential control that Here it is will reach.
Carbonitriding: take carburizing as the main chemical heat treatment process that infiltrates simultaneously nitrogen.Though it has overcome to a certain extent nitrided case hardness height but infiltration layer is more shallow, though and the cementation zone hardening depth is large, the shortcoming that surface hardness is lower.
At present on the market traditional carbon potential control system there are the following problems:
1. the input signal major part only has temperature (thermopair) and oxygen gesture (oxygen probe), it only is the function formula of temperature and oxygen gesture that carbon potential calculates, the carbon monoxide pressure of tension value is rule of thumb set by the technologist as fixed value, can exist like this owing to the inaccurate error that cause carbon potential calculate of carbon monoxide pressure of tension value owing to artificial setting.
2. the oxygen probe compatibility is bad.
3. expensive.
4. can not accomplish a table realization carbonitriding.
5. operation and setting are extremely complicated, and man-machine interface is also unfriendly.
Summary of the invention
The utility model has solved above problem, adopt programmable analog amount controller (such as the DMC50 of mountain force) commonly used on the market, method with program is implanted the carbon potential calculation formula, formula or red tape operation/increase are flexible, adapt to all on the market oxygen probes, can increase at any time different carbon potential calculation formula; Increase carbon monoxide and measure, measure in real time the carbon monoxide pressure of tension value, avoid artificial specification error; Increasing carbon dioxide content measures, cubage carbon potential (being called for short carbon potential two) according to carbonic acid gas, the carbon potential that carbon potential two and oxygen probe calculate (being called for short carbon potential one) relatively, then report to the police greater than setting deviate such as carbon potential one and carbon potential 22 deviations, avoid because the oxygen probe measuring error causes the carbon potential miscalculation; Increase ammonia control function, the flow of control ammonia flow meter injects the ammonia of setting flow in furnace chamber, realize carbonitriding when can realize controlling carbon potential; Be the probe commonly used on the market (PLC can) because probe adopts, cost is very low, and expansion is convenient.Man-machine interface adopts touch-screen, self-control human interface software, full Chinese interface, the use habit of suitable domestic manufacturer.
The utility model is achieved through the following technical solutions: a kind of carbon potential control system, it comprises: principal controller, man-machine interface, carbon monoxide transducer, carbon dioxide sensor, temperature sensor, oxygen level sensor, the ammonia flow controller, power regulator and carburizing control valve, the described temperature sensor that is arranged in the body of heater, oxygen level sensor, the output terminal of carbon monoxide transducer and carbon dioxide sensor links to each other with the respective input of principal controller respectively, each output terminal of principal controller respectively with power regulator, the carburizing control valve links to each other with the input terminus of ammonia flow controller, the output terminal of described power regulator links to each other with well heater in being installed in body of heater, the output terminal of described carburizing control valve and ammonia flow controller links to each other with heating space in the body of heater by pipeline, and described man-machine interface links to each other with principal controller.
Comprise carbon potential computing unit one in the described principal controller, carbon potential computing unit two, the carbon potential selector switch, temperature PID control unit, carbon potential PID control unit and ammonia flow control unit, the signal input part of described carbon potential computing unit one respectively with oxygen level sensor, carbon monoxide transducer links to each other with temperature sensor, the signal output part of carbon potential computing unit one links to each other with a signal input part of carbon potential selector switch, the signal input part of carbon potential computing unit two respectively with carbon monoxide transducer, carbon dioxide sensor links to each other with temperature sensor, the signal output part of carbon potential computing unit two links to each other with another signal input part of carbon potential selector switch, the signal output part of carbon potential selector switch links to each other with carbon potential PID control unit biologicalinput end, the output terminal of carbon potential PID control unit links to each other with the carburizing control valve, the signal input part of described temperature PID control unit links to each other with temperature sensor, the signal output part of temperature PID control unit links to each other with the input terminus of power regulator, and the output terminal of described ammonia flow control unit links to each other with the input terminus of ammonia flow controller.PID is a kind of loop control mathematical model, its implication: P-ratio control, I-integral control, D-differential control.
Described principal controller adopts the programmable analog amount controller.
Described principal controller adopts serial port RS-485 to communicate by letter with man-machine interface.
Described temperature sensor is thermopair.
The beneficial effects of the utility model are: increase carbon potential computing unit two, make the sign of carbon potential more accurately and reliably, increase the carbon monoxide pressure of tension value and measure, carbon potential calculates more accurate, control accuracy is higher, uses domestic programmable analog controller more convenient, and cost is also lower.
Description of drawings
Fig. 1 is the whole schematic diagram of a kind of carbon potential control system of the present utility model.
Fig. 2 is the functional block diagram of a kind of carbon potential control system of the present utility model.
Among the figure: 1-body of heater, 2-well heater, 3-principal controller, 4-man-machine interface, 5-carbon monoxide transducer, 6-carbon dioxide sensor, 7-temperature sensor, 8-oxygen level sensor, 9-ammonia flow controller, 10-power regulator, 11-carburizing control valve.
Embodiment
Such as Fig. 1, shown in 2, a kind of carbon potential control system, comprise: principal controller 3, man-machine interface 4, carbon monoxide transducer 5, carbon dioxide sensor 6, temperature sensor 7, oxygen level sensor 8, ammonia flow controller 9, power regulator 10 and carburizing control valve 11, the described temperature sensor 7 that is arranged in the body of heater 1, oxygen level sensor 8, the output terminal of carbon monoxide transducer 5 and carbon dioxide sensor 6 links to each other with the respective input of principal controller 3 respectively, each output terminal of principal controller 3 respectively with power regulator 10, carburizing control valve 11 links to each other with the input terminus of ammonia flow controller 9, the output terminal of described power regulator 10 links to each other with well heater 2 in being installed in body of heater 1, the output terminal of described carburizing control valve 11 and ammonia flow controller 9 links to each other by the heating space in pipeline and the body of heater 1, and described man-machine interface 4 links to each other with principal controller 3.
Comprise carbon potential computing unit one in the described principal controller 3, carbon potential computing unit two, the carbon potential selector switch, temperature PID control unit, carbon potential PID control unit and ammonia flow control unit, the signal input part of described carbon potential computing unit one respectively with oxygen level sensor 8, carbon monoxide transducer 5 links to each other with temperature sensor 7, the signal output part of carbon potential computing unit one links to each other with a signal input part of carbon potential selector switch, the signal input part of carbon potential computing unit two respectively with carbon monoxide transducer 5, carbon dioxide sensor 6 links to each other with temperature sensor 7, the signal output part of carbon potential computing unit two links to each other with another signal input part of carbon potential selector switch, the signal output part of carbon potential selector switch links to each other with carbon potential PID control unit biologicalinput end, the output terminal of carbon potential PID control unit links to each other with carburizing control valve 11, the signal input part of described temperature PID control unit links to each other with temperature sensor 7, the signal output part of temperature PID control unit links to each other with the input terminus of power regulator 10, and the output terminal of described ammonia flow control unit links to each other with the input terminus of ammonia flow controller 9.
When this carbon potential control system work, carbon monoxide transducer 5 on the body of heater 1, carbon dioxide sensor 6, the carbon monoxide content that temperature sensor 7 and oxygen level sensor 8 are measured, carbon dioxide content, temperature and oxygen level input to the corresponding input aperture of principal controller 3, carbon monoxide content wherein, oxygen level and temperature form the carbon potential computing units one that one group of data enters in the principal controller 3 and calculate carbon potential value one, carbon monoxide content, carbon dioxide content and temperature form the carbon potential computing units two that one group of data enters in the principal controller 3 and calculate carbon potential value two, after selecting, carbon potential value one and the carbon potential value two carbon potential selector switch (artificial selected) in principal controller 3 obtains the carbon potential PID control unit in the final control carbon potential value input principal controller 3, carbon potential PID control unit is compared this carbon potential value with the carbon potential target value, after carrying out the PID computing, obtain the control signal of carburizing control valve 11, the air input of control carburizing gas (enriched gas), thus the carbon potential in the control body of heater 1 is stabilized in target value; Simultaneously, temperature PID control unit in the temperature signal input principal controller 3, temperature PID control unit compares the temperature value of measurement and the temperature objectives value of setting, after carrying out the PID computing, obtain the control signal of power regulator 10, the output power power of control power regulator 10, thus the temperature-stable in the control body of heater 1 is in the temperature objectives value.
When thermal treatment process requires carbonitriding, set certain ammonia flow, the ammonia flow control unit is set the control signal that obtains the ammonia flow controller according to this ammonia flow, control ammonia flow controller 9, thereby the target value that ammonia flow is stabilized in set, make the certain nitrogen atom concentration of body of heater 1 interior maintenance, reach the purpose of carbonitriding.
Carbon monoxide transducer adopts the Infrared Carbon Monoxide measuring system in the utility model, and carbon dioxide sensor adopts the infrared carbon dioxide measuring system.
Claims (5)
1. carbon potential control system, it is characterized in that it comprises: principal controller (3), man-machine interface (4), carbon monoxide transducer (5), carbon dioxide sensor (6), temperature sensor (7), oxygen level sensor (8), ammonia flow controller (9), power regulator (10) and carburizing control valve (11), the described temperature sensor (7) that is arranged in the body of heater (1), oxygen level sensor (8), the output terminal of carbon monoxide transducer (5) and carbon dioxide sensor (6) links to each other with the respective input of principal controller (3) respectively, each output terminal of principal controller (3) respectively with power regulator (10), carburizing control valve (11) links to each other with the input terminus of ammonia flow controller (9), the output terminal of described power regulator (10) well heater (2) interior with being installed in body of heater (1) links to each other, the output terminal of described carburizing control valve (11) and ammonia flow controller (9) links to each other by the interior heating space of pipeline and body of heater (1), and described man-machine interface (4) links to each other with principal controller (3).
2. carbon potential control system according to claim 1, it is characterized in that: described principal controller comprises carbon potential computing unit one in (3), carbon potential computing unit two, the carbon potential selector switch, temperature PID control unit, carbon potential PID control unit and ammonia flow control unit, the signal input part of described carbon potential computing unit one respectively with oxygen level sensor (8), carbon monoxide transducer (5) links to each other with temperature sensor (7), the signal output part of carbon potential computing unit one links to each other with a signal input part of carbon potential selector switch, the signal input part of carbon potential computing unit two respectively with carbon monoxide transducer (5), carbon dioxide sensor (6) links to each other with temperature sensor (7), the signal output part of carbon potential computing unit two links to each other with another signal input part of carbon potential selector switch, the signal output part of carbon potential selector switch links to each other with carbon potential PID control unit biologicalinput end, the output terminal of carbon potential PID control unit links to each other with carburizing control valve (11), the signal input part of described temperature PID control unit links to each other with temperature sensor (7), the signal output part of temperature PID control unit links to each other with the input terminus of power regulator (10), and the output terminal of described ammonia flow control unit links to each other with the input terminus of ammonia flow controller (9).
3. carbon potential control system according to claim 1 is characterized in that: described principal controller (3) employing programmable analog amount controller.
4. carbon potential control system according to claim 1 is characterized in that: described principal controller (3) adopts serial port RS-485 to communicate by letter with man-machine interface (4).
5. carbon potential control system according to claim 1, it is characterized in that: described temperature sensor (7) is thermopair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220406378 CN202717834U (en) | 2012-08-16 | 2012-08-16 | Carbon potential control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220406378 CN202717834U (en) | 2012-08-16 | 2012-08-16 | Carbon potential control system |
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| CN202717834U true CN202717834U (en) | 2013-02-06 |
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| CN 201220406378 Expired - Lifetime CN202717834U (en) | 2012-08-16 | 2012-08-16 | Carbon potential control system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390453A (en) * | 2014-11-21 | 2015-03-04 | 沈阳创联炉窑技术有限公司 | Process air control system of carbon rotary hearth calciner |
| CN105369188A (en) * | 2015-11-16 | 2016-03-02 | 江苏丰东热技术股份有限公司 | Carbon potential operator |
| CN105573237A (en) * | 2016-01-08 | 2016-05-11 | 江苏丰东热技术股份有限公司 | Carbon potential calculating method |
| CN108251787A (en) * | 2018-01-23 | 2018-07-06 | 南京科达新控仪表有限公司 | A kind of carbo-nitriding automatic control system |
| CN109085042A (en) * | 2018-07-26 | 2018-12-25 | 江苏高思控制系统有限公司 | Portable combustion gas analyzer and its analysis method |
| CN112522662A (en) * | 2020-11-18 | 2021-03-19 | 吉林北方捷凯传动轴有限公司 | On-line monitoring and alarming device for gas carburization equipment |
| CN115016573A (en) * | 2022-07-12 | 2022-09-06 | 石家庄德堃电子科技有限公司 | Carbon potential control method, system and device |
-
2012
- 2012-08-16 CN CN 201220406378 patent/CN202717834U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390453A (en) * | 2014-11-21 | 2015-03-04 | 沈阳创联炉窑技术有限公司 | Process air control system of carbon rotary hearth calciner |
| CN105369188A (en) * | 2015-11-16 | 2016-03-02 | 江苏丰东热技术股份有限公司 | Carbon potential operator |
| CN105369188B (en) * | 2015-11-16 | 2018-06-08 | 江苏丰东热技术有限公司 | A kind of carbon potential exerciser |
| CN105573237A (en) * | 2016-01-08 | 2016-05-11 | 江苏丰东热技术股份有限公司 | Carbon potential calculating method |
| CN105573237B (en) * | 2016-01-08 | 2018-08-14 | 江苏丰东热技术股份有限公司 | A kind of carbon potential computational methods |
| CN108251787A (en) * | 2018-01-23 | 2018-07-06 | 南京科达新控仪表有限公司 | A kind of carbo-nitriding automatic control system |
| CN109085042A (en) * | 2018-07-26 | 2018-12-25 | 江苏高思控制系统有限公司 | Portable combustion gas analyzer and its analysis method |
| CN112522662A (en) * | 2020-11-18 | 2021-03-19 | 吉林北方捷凯传动轴有限公司 | On-line monitoring and alarming device for gas carburization equipment |
| CN115016573A (en) * | 2022-07-12 | 2022-09-06 | 石家庄德堃电子科技有限公司 | Carbon potential control method, system and device |
| CN115016573B (en) * | 2022-07-12 | 2024-05-03 | 石家庄德堃电子科技有限公司 | Carbon potential control method, system and device |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130206 |
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| CX01 | Expiry of patent term |