CN213581873U - On-line self-calibration sensor furnace temperature tracking control device - Google Patents
On-line self-calibration sensor furnace temperature tracking control device Download PDFInfo
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- CN213581873U CN213581873U CN202022210351.9U CN202022210351U CN213581873U CN 213581873 U CN213581873 U CN 213581873U CN 202022210351 U CN202022210351 U CN 202022210351U CN 213581873 U CN213581873 U CN 213581873U
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Abstract
The utility model discloses an online self calibration sensor furnace temperature tracking control device. The utility model discloses well self calibration thermocouple temperature sensor sets up on the furnace body inside wall of trolley type gas heat treatment furnace, self calibration pressure sensor in the stove sets up on the furnace body of trolley type gas heat treatment furnace, flue self calibration pressure sensor sets up on the flue inside wall, self calibration thermocouple temperature sensor, in stove self calibration pressure sensor and flue self calibration pressure sensor all are connected with the input electricity of PLC controller, the nozzle control system of trolley type gas heat treatment furnace, fan control system and transmission system all are connected with the output electricity of PLC controller. The problem that whether the sensor fluctuates normally or in fault can not be judged in time when the detection value is abnormal for a long time is solved, and the fault can be judged in time according to the detection data.
Description
Technical Field
The invention belongs to the technical field of furnace temperature tracking control, and particularly relates to an on-line self-calibration sensor furnace temperature tracking control device.
Background
In the process of tracking and controlling the furnace temperature of the industrial furnace, if a certain sensor, such as a temperature sensor, a wind pressure sensor and the like, generates numerical fluctuation, a furnace temperature tracking control device of the industrial furnace cannot determine whether the sensor is normal furnace condition fluctuation or the numerical fluctuation caused by the fault of the sensor in a short time. Sensor faults are usually found only when huge losses are caused by product abnormalities, even if the sensors are known to be faulty, because a better verification method is not available, a plurality of sensors can be verified to determine which sensor is faulty, and the huge losses are undoubtedly caused to the production of enterprises. At present, a common method for solving the above problems is to repeatedly arrange sensors in an important area, and because the furnace conditions of various points are different at certain distances among temperature measuring points of the sensors, when the numerical values of the sensors in the important area are different, a furnace temperature tracker cannot quickly judge whether the furnace conditions are fluctuated or the sensors are in fault. Therefore, an online self-calibration sensor furnace temperature tracking control device is specially developed by the company.
SUMMERY OF THE UTILITY MODEL
In order to compensate for the deficiencies of the prior art, the utility model provides an online self calibration sensor furnace temperature tracking control device.
The technical scheme of the utility model is that:
an on-line self-calibration sensor furnace temperature tracking control device comprises a plurality of self-calibration thermocouple temperature sensors, a furnace self-calibration pressure sensor and a flue self-calibration pressure sensor, wherein the self-calibration thermocouple temperature sensors are fixedly arranged on the inner side wall of a furnace body of a trolley type gas heat treatment furnace; the furnace temperature tracker, the gas regulating valve on the gas pipeline connected with the gas nozzle of the trolley type gas heat treatment furnace and the gas supply regulating valve on the gas supply pipeline connected with the gas nozzle of the trolley type gas heat treatment furnace are all electrically connected with the output end of the PLC controller. When the PLC detects that any one of the self-calibration thermocouple temperature sensor, the in-furnace self-calibration pressure sensor and the flue self-calibration pressure sensor has a fault, the PLC controls the gas regulating valve and the gas supply regulating valve to be gradually closed to enable the gas pressure of the nozzle to be gradually reduced until the spraying is stopped, and the furnace temperature tracker can display the position of the fault self-calibration sensor, so that a maintainer can timely and accurately position a damaged part.
Preferably, the self-calibration thermocouple temperature sensor comprises a plurality of thermocouple temperature sensors, a sensor outer sheath is fixedly sleeved outside the plurality of thermocouple temperature sensors, the plurality of thermocouple temperature sensors are electrically connected with the input end of the single chip microcomputer, and the output end of the single chip microcomputer is connected with the input end of the PLC; the number of the thermocouple temperature sensors is at least three, and the single chip microcomputer is provided with a program for monitoring the slopes of the same curves of the plurality of thermocouple temperature sensors. When the slope of the curve of any thermocouple temperature sensor in the self-calibration pressure sensor in the furnace exceeds the allowable variation range, the single chip microcomputer sends a signal of the fault of the self-calibration thermocouple temperature sensor to the PLC controller, the PLC controller controls the gas regulating valve and the gas supply regulating valve to be gradually closed according to the signal of the fault of the self-calibration thermocouple temperature sensor fed back by the single chip microcomputer, the gas pressure of the nozzle is gradually reduced until the spraying is stopped, meanwhile, the PLC controller also sends the signal to the furnace temperature tracker, and the furnace temperature tracker instantly displays the position of the fault self-calibration thermocouple temperature sensor in a video mode.
Preferably, the in-furnace self-calibration pressure sensor comprises a plurality of pressure sensors, a sensor outer sheath is fixedly sleeved outside the pressure sensors, the pressure sensors are electrically connected with the input end of a single chip microcomputer, and the output end of the single chip microcomputer is connected with the input end of a PLC (programmable logic controller); the number of the pressure sensors is at least three, and the single chip microcomputer is provided with a program for monitoring the slopes of the same curves of the pressure sensors. When the slope of the curve of any pressure sensor exceeds the allowable variation range, the single chip microcomputer sends a signal of the fault of the self-calibration pressure sensor in the furnace to the PLC controller, the PLC controller controls the gas regulating valve and the gas supply regulating valve to be gradually closed so that the gas pressure of the nozzle is gradually reduced until the spraying is stopped, meanwhile, the PLC controller 13 can feed back data to the furnace temperature recorder, and the furnace temperature tracker instantly displays the self-calibration pressure sensor position in the fault furnace in a video-audio mode.
Preferably, the flue self-calibration pressure sensor comprises a plurality of pressure sensors, a sensor outer sheath is fixedly sleeved outside the pressure sensors, the pressure sensors are electrically connected with the input end of a single chip microcomputer, and the output end of the single chip microcomputer is connected with the input end of a PLC (programmable logic controller); the number of the pressure sensors is at least three, and the single chip microcomputer is provided with a program for monitoring the slopes of the same curves of the pressure sensors. When the slope of the curve of any one pressure sensor in the flue self-calibration pressure sensor exceeds an allowable variation range, the single chip microcomputer sends a signal of the fault of the flue self-calibration pressure sensor to the PLC controller, the PLC controller controls the gas regulating valve and the gas supply regulating valve to be gradually closed, so that the gas pressure of the nozzle is gradually reduced until the spraying is stopped, meanwhile, the PLC controller can feed data back to the furnace temperature recorder, and the furnace temperature tracker instantly displays the position of the fault flue self-calibration pressure sensor in a video-audio mode.
Preferably, a total outer sheath is fixedly sleeved outside a plurality of sensor outer sheaths in the self-calibration thermocouple temperature sensor, the in-furnace self-calibration pressure sensor and the flue self-calibration pressure sensor.
Compared with the prior art, the beneficial effects of the utility model are as follows:
the problem that whether the sensor is normal fluctuation or fault fluctuation can not be judged in time when a detection value is abnormal for a long time is solved, the fault can be judged in time according to detection data, particularly, when a PLC (programmable logic controller) detects that any one of a self-calibration thermocouple temperature sensor, an in-furnace self-calibration pressure sensor and a flue self-calibration pressure sensor is in fault, a gas regulating valve and a gas supply regulating valve are controlled to be closed gradually to enable the gas pressure of a nozzle to be reduced gradually until the spraying is stopped, a furnace temperature tracker can display the position of the fault self-calibration sensor, and a maintainer can timely and accurately position a damaged part to process the damaged part, so that quality accidents can be effectively prevented when the PLC is used.
Drawings
FIG. 1 is a state diagram of the present invention in use;
FIG. 2 is a schematic diagram of a self-calibrating thermocouple temperature sensor;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a control schematic;
in the figure: 1. the system comprises a ground, 2, a guide rail, 3, a mobile trolley, 4, a furnace door, 5, a furnace door lifting device, 6, a self-calibration thermocouple temperature sensor, 7, a nozzle, 8, a self-calibration pressure sensor in the furnace, 9, a furnace body, 10, a flue, 11, a flue self-calibration pressure sensor, 12, a furnace temperature tracker, 13, a PLC (programmable logic controller), 14, a sensor temperature measuring point, 15, a total outer sheath, 16, a sensor lead, 17, a single chip microcomputer, 18, an output lead, 19 and a sensor outer sheath.
Detailed Description
Fig. 1 to 4 are an embodiment of the present invention, and since the structural schematic diagrams of the self-calibration thermocouple temperature sensor 6, the in-furnace self-calibration pressure sensor 8 and the flue self-calibration pressure sensor 11 are consistent, the structural schematic diagram of the self-calibration thermocouple temperature sensor is only provided in this embodiment, as shown in fig. 2.
In the present embodiment, a car-type gas heat treatment furnace is taken as an example to explain the operation principle and the structural features of the self-calibration sensor furnace temperature tracking control device, the operation and use principles of the car-type gas heat treatment furnace and the car-type gas heat treatment furnace described in the present application are the prior art, the guide rail, the moving car, the furnace door and the furnace door lifting device described in the present embodiment are all the existing components included in the car-type gas heat treatment furnace, and are also the prior art, and the structures thereof are not described in detail herein.
In the embodiment, the trolley type gas heat treatment furnace comprises a guide rail 2 fixedly arranged on the ground 1, the guide rail 2 is connected with a mobile trolley 3 in a rolling manner, after a workpiece carried by the mobile trolley 3 moves into a fixed furnace body 9, a worker can control the furnace door lifting device 5 to work so as to enable the furnace door 4 to fall down, and then control a nozzle 7 of the gas heat treatment furnace to ignite gas for spraying.
Eight self-calibration thermocouple temperature sensors 6 are fixedly arranged on the inner side wall of a furnace body 9 of the trolley type gas heat treatment furnace in the embodiment, two in-furnace self-calibration pressure sensors 8 are fixedly arranged on the furnace body 9 of the trolley type gas heat treatment furnace, and a flue self-calibration pressure sensor 11 is fixedly arranged on the inner side wall of a flue 10 of the trolley type gas heat treatment furnace; in the embodiment, eight self-calibration thermocouple temperature sensors 6, two in-furnace self-calibration pressure sensors 8 and one flue self-calibration pressure sensor 11 are electrically connected with the input end of a PLC (programmable logic controller) 13; the furnace temperature tracker 12, the gas regulating valve on the gas pipeline connected with the gas nozzle of the trolley-type gas heat treatment furnace and the gas supply regulating valve on the gas supply pipeline connected with the gas nozzle of the trolley-type gas heat treatment furnace are all electrically connected with the output end of the PLC 13;
the self-calibration thermocouple temperature sensor 6 in the embodiment comprises three thermocouple temperature sensors, a sensor outer sheath 19 is fixedly sleeved outside the three thermocouple temperature sensors, a total outer sheath 15 is further sleeved outside the three sensor outer sheaths 19, the three thermocouple temperature sensors are electrically connected with the input end of a single chip microcomputer 17 through sensor leads 16, and the output end of the single chip microcomputer 17 is connected with the input end of a PLC (programmable logic controller) 13 through an output lead 18; the single chip microcomputer 17 is provided with a program for monitoring the slopes of the same curves of the plurality of thermocouple temperature sensors; when the slope of any one of the thermocouple temperature sensors in the self-calibration thermocouple temperature sensor 6 exceeds the allowable change range, the single chip microcomputer 17 in the self-calibration thermocouple temperature sensor 6 sends a signal that the self-calibration thermocouple temperature sensor 6 fails to work to the PLC controller 13, the PLC controller 13 controls the gas regulating valve and the gas supply regulating valve to be gradually closed so that the gas pressure of the nozzle is gradually reduced until the nozzle stops spraying, the quality accident is prevented from occurring, meanwhile, the PLC controller 13 can also feed data back to the furnace temperature recorder 12, and the furnace temperature recorder 12 can instantly display the location of the self-calibration thermocouple temperature sensor 6 according to the data fed back by the PLC controller 13;
the self-calibration pressure sensor 8 in the furnace comprises three pressure sensors, a sensor outer sheath 19 is fixedly sleeved outside the three pressure sensors, a main outer sheath 15 is further sleeved outside the three sensor outer sheaths 19, the three pressure sensors are electrically connected with the input end of a single chip microcomputer 17 through sensor leads 16, and the output end of the single chip microcomputer 17 is connected with the input end of a PLC (programmable logic controller) 13 through an output lead 18; the single chip microcomputer 17 is provided with a program for monitoring the slopes of the same curves of the plurality of pressure sensors; when the slope of any thermocouple temperature sensor curve in the in-furnace self-calibration pressure sensor 8 exceeds the allowable change range, the single chip microcomputer 17 in the in-furnace self-calibration pressure sensor 8 sends a signal that the in-furnace self-calibration pressure sensor 8 fails to work to the PLC controller 13, the PLC controller 13 controls the gas regulating valve and the gas supply regulating valve to be gradually closed so that the gas pressure of a nozzle is gradually reduced until the spraying is stopped, the quality accident is prevented, meanwhile, the PLC controller 13 can feed data back to the furnace temperature recorder 12, and the furnace temperature recorder 12 can instantly display the location of the in-furnace self-calibration pressure sensor 8 in an audio-visual manner according to the data fed back by the PLC controller 13;
the flue self-calibration pressure sensor 11 comprises three pressure sensors, a sensor outer sheath 19 is fixedly sleeved outside the three pressure sensors, a main outer sheath 15 is further sleeved outside the three sensor outer sheaths 19, the three pressure sensors are electrically connected with the input end of a single chip microcomputer 17 through sensor leads 16, and the output end of the single chip microcomputer 17 is connected with the input end of a PLC (programmable logic controller) 13 through an output lead 18; the single chip microcomputer 17 is provided with a program for monitoring the slopes of the same curves of the plurality of pressure sensors; when the slope of any thermocouple temperature sensor curve in the flue self-calibration pressure sensor 11 exceeds the allowable change range, the single chip microcomputer 17 in the flue self-calibration pressure sensor 11 sends a signal that the flue self-calibration pressure sensor 11 fails to work to the PLC 13, the PLC 13 controls the gas regulating valve and the gas supply regulating valve to be gradually closed to enable the gas pressure of the nozzle to be gradually reduced until the spraying is stopped, so that the quality accident is prevented, meanwhile, the PLC 13 can feed data back to the furnace temperature recorder 12, and the furnace temperature recorder 12 can instantly display the location of the flue self-calibration pressure sensor 11 in an audio-visual manner according to the data fed back by the PLC 13;
the lower ends of the self-calibration thermocouple sensor, the in-furnace self-calibration pressure sensor and the flue self-calibration pressure sensor in the embodiment are sensor temperature measuring points 14;
the self-calibration thermocouple sensor, the in-furnace self-calibration pressure sensor and the flue self-calibration pressure sensor judge whether the sensors normally fluctuate or are abnormally utilized when measurement values change, and the same sensors test the characteristic that the same point positions have the same curve slope under the same working condition.
The application takes a self-calibration thermocouple sensor as an example to detail the principle that whether the sensor is normal fluctuation or abnormal is judged when the measured value changes: when the single chip microcomputer detects that the slope of a curve fed back by one thermocouple temperature sensor in the self-calibration thermocouple sensor does not exceed the allowable change range, the single chip microcomputer cannot judge that the thermocouple temperature sensor fails according to the change of the temperature value of the thermocouple temperature sensor, and a fault signal cannot be sent to the PLC; when the single chip microcomputer detects that the slope of a curve fed back by one thermocouple temperature sensor in the self-calibration thermocouple sensor exceeds the allowable change range, the single chip microcomputer judges that the thermocouple temperature sensor has a fault according to the change of the temperature value of the thermocouple temperature sensor, and sends a fault signal to the PLC.
In the embodiment, the self-calibration thermocouple temperature sensor 6, the in-furnace self-calibration pressure sensor 8 and the flue self-calibration pressure sensor 11 can send data to the PLC 13 in real time, and the PLC 13 feeds the data back to the furnace temperature recorder for displaying.
If a certain self-calibration thermocouple temperature sensor 6, a furnace self-calibration pressure sensor 8 or a flue self-calibration pressure sensor 11 has a fault in the working process, the self-calibration thermocouple temperature sensor 6, the furnace self-calibration pressure sensor 8 or the flue self-calibration pressure sensor 11 with the fault sends an alarm signal to the PLC controller 13, the PLC controller 13 controls the gas regulating valve and the gas supply regulating valve to be gradually closed, so that the gas pressure of the nozzle is gradually reduced until the spraying is stopped, the quality accident is prevented, meanwhile, the PLC controller 13 feeds data back to the furnace temperature recorder 12, and the furnace temperature tracker 12 displays the position of the self-calibration sensor with the fault and carries out audio-visual flash prompting.
Claims (5)
1. The utility model provides an online self calibration sensor furnace temperature tracking control device which characterized in that: the device comprises a plurality of self-calibration thermocouple temperature sensors, a furnace self-calibration pressure sensor and a flue self-calibration pressure sensor, wherein the self-calibration thermocouple temperature sensors are fixedly arranged on the inner side wall of a furnace body of the trolley type gas heat treatment furnace; the self-calibration thermocouple temperature sensor, the in-furnace self-calibration pressure sensor and the flue self-calibration pressure sensor are electrically connected with the input end of the PLC, and the furnace temperature tracker, the gas regulating valve on the gas pipeline connected with the gas nozzle of the trolley type gas heat treatment furnace and the gas supply regulating valve on the gas supply pipeline connected with the gas nozzle of the trolley type gas heat treatment furnace are electrically connected with the output end of the PLC.
2. The on-line self-calibrating sensor furnace temperature tracking control device of claim 1, wherein: the self-calibration thermocouple temperature sensor comprises a plurality of thermocouple temperature sensors, a sensor outer sheath is fixedly sleeved outside the thermocouple temperature sensors, the thermocouple temperature sensors are electrically connected with the input end of a single chip microcomputer, and the output end of the single chip microcomputer is connected with the input end of a PLC (programmable logic controller); the number of the thermocouple temperature sensors is at least three, and the single chip microcomputer is provided with a program for monitoring the slopes of the same curves of the plurality of thermocouple temperature sensors.
3. The on-line self-calibrating sensor furnace temperature tracking control device of claim 1, wherein: the self-calibration pressure sensor in the furnace comprises a plurality of pressure sensors, a sensor outer sheath is fixedly sleeved outside the pressure sensors, the pressure sensors are electrically connected with the input end of a single chip microcomputer, and the output end of the single chip microcomputer is connected with the input end of a PLC (programmable logic controller); the number of the pressure sensors is at least three, and the single chip microcomputer is provided with a program for monitoring the slopes of the same curves of the pressure sensors.
4. The on-line self-calibrating sensor furnace temperature tracking control device of claim 1, wherein: the flue self-calibration pressure sensor comprises a plurality of pressure sensors, a sensor outer sheath is fixedly sleeved outside the pressure sensors, the pressure sensors are electrically connected with the input end of a single chip microcomputer, and the output end of the single chip microcomputer is connected with the input end of a PLC (programmable logic controller); the number of the pressure sensors is at least three, and the single chip microcomputer is provided with a program for monitoring the slopes of the same curves of the pressure sensors.
5. The on-line self-calibrating sensor furnace temperature tracking control device of claim 1, wherein: and a total outer sheath is fixedly sleeved outside a plurality of sensor outer sheaths in the self-calibration thermocouple temperature sensor, the in-furnace self-calibration pressure sensor and the flue self-calibration pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022210351.9U CN213581873U (en) | 2020-09-30 | 2020-09-30 | On-line self-calibration sensor furnace temperature tracking control device |
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| CN202022210351.9U CN213581873U (en) | 2020-09-30 | 2020-09-30 | On-line self-calibration sensor furnace temperature tracking control device |
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| CN213581873U true CN213581873U (en) | 2021-06-29 |
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| CN202022210351.9U Active CN213581873U (en) | 2020-09-30 | 2020-09-30 | On-line self-calibration sensor furnace temperature tracking control device |
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