CN104765326A - Air discharge monitoring system - Google Patents
Air discharge monitoring system Download PDFInfo
- Publication number
- CN104765326A CN104765326A CN201410008610.6A CN201410008610A CN104765326A CN 104765326 A CN104765326 A CN 104765326A CN 201410008610 A CN201410008610 A CN 201410008610A CN 104765326 A CN104765326 A CN 104765326A
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- Prior art keywords
- air draft
- layer equipment
- supervisory system
- host computer
- frequency converter
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/048—Monitoring; Safety
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Testing And Monitoring For Control Systems (AREA)
Abstract
The invention provides an air discharge monitoring system, relating to the technical field of air discharge equipment monitoring in the industrial and technical processes. In the prior art, when an air duct of a present air discharge monitoring system of technical equipment is blocked and the like, the air quantity and the absolute wind pressure are not within normal work ranges even if the wind pressure can still reach a set value, the system has faults, and production is influenced. The air discharge monitoring system of the invention comprises a driving layer device and a processing layer device, wherein the driving layer device is used for air discharge, and the processing layer device determines whether a present pipeline is normal according to relation among working parameters of the driving layer device, and emits an alarm signal when the pipeline is abnormal. Thus, reliable wind-pressure-constant control is realized; and when the wind pressure is still maintained when the air duct is blocked in the production process but cannot satisfy normal work of production equipment, the air charge monitoring system can realize remote alarm, notify related staff of taking measures timely, and thus, avoid the production equipment from unplanned shutdown to the large extent.
Description
Technical field
The present invention relates to industrial technology processing procedure exhaust equipment monitoring technique field, refer to a kind of air draft supervisory system especially.
Background technology
At present, the application scenario of process equipment air draft supervisory system routine is dual-purpose one standby, Isobarically Control is realized by a differential pressure pickup, but sometimes because the reason blast such as airduct obstruction still enough meet setting value requirement, but air quantity and absolute blast are all in non-normal working district, cause the system failure to affect and produce.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of air draft supervisory system, in solution prior art, process equipment air draft supervisory system is sometimes because the reason blast such as airduct obstruction still enough meet setting value requirement, but air quantity and absolute blast are all in non-normal working district, the system failure is caused to affect the problem of producing.
For solving the problems of the technologies described above, embodiments of the invention provide a kind of air draft supervisory system, comprising:
For the driving layer equipment of air draft;
For judge according to the relation between the running parameter of described driving layer equipment when preceding pipeline whether normally and send the processing layer equipment of alerting signal when described pipeline is abnormal.
Above-mentioned air draft supervisory system, wherein, described driving layer equipment at least comprises blower fan and frequency converter; Described running parameter at least comprises the pressure reduction of the rotating speed of described blower fan, electric current and generation; Described processing layer equipment at least comprises programmable controller PLC.
Above-mentioned air draft supervisory system, wherein, described programmable controller PLC obtains described rotating speed and described electric current by described frequency converter, and described PLC can obtain the correlation parameter of described frequency converter simultaneously, and described correlation parameter at least comprises frequency.
Above-mentioned air draft supervisory system, wherein, also comprises:
For obtaining the differential pressure pickup of the pressure reduction that described blower fan produces, described differential pressure pickup is connected with described processing layer equipment by relevant control line.
Above-mentioned air draft supervisory system, wherein, also comprises:
For detecting the temperature sensor of motor temperature in described blower fan, described temperature sensor is connected with described frequency converter respectively with the bearing of motor in described blower fan.
Above-mentioned air draft supervisory system, wherein, also comprises:
For ensure described processing layer equipment to be connected with the communication port of described frequency converter after the terminal resistance of communication robust, described terminal resistance is arranged in the module of the communication port of described frequency converter.
Above-mentioned air draft supervisory system, wherein, also comprises:
For accepting described alerting signal that described processing layer equipment sends and carrying out the application layer equipment of reporting to the police, described application layer equipment at least comprises host computer.
Above-mentioned air draft supervisory system, wherein, described host computer adopts redundant system, and host computer described in every platform all can read and monitor three described blower fans.
Above-mentioned air draft supervisory system, wherein, also comprises:
For connecting the transfer layer equipment of described processing layer equipment and described driving journey equipment or described application layer equipment, described transfer layer equipment at least comprises:
For connecting the industrial switch of described programmable controller PLC and described host computer;
For connecting the Bussing connector of described programmable controller PLC and described frequency converter.
Above-mentioned air draft supervisory system, wherein, described transfer layer equipment also comprises:
For connecting the remote interface of external device, described remote interface is connected with described programmable controller PLC.
Above-mentioned air draft supervisory system, wherein, described air draft monitoring system can adopt constant-pressure drop mode of operation or constant frequency rate mode of operation.
Above-mentioned air draft supervisory system, wherein, under described constant voltage mode of operation, described pressure reduction is constant, described programmable controller PLC judges whether described rotating speed and described electric current are stabilized in setting range, if not in setting range, to give the alarm signal to described host computer, described host computer receives described alerting signal and reports to the police; Under described constant frequency rate mode of operation, described rotating speed and described frequency all constant, described programmable controller PLC judges whether described electric current and described pressure reduction exceed setting value, if do not exceed setting value, to give the alarm signal to described host computer, described host computer receives described alerting signal and reports to the police.
The beneficial effect of technique scheme of the present invention is as follows:
In such scheme, described air draft supervisory system can realize the function reliably solving blast constant control problem; And in process of production airduct block and blast still maintains original pressure; but described air draft supervisory system when production equipment normally works can not be met and can realize the function of remote alarms; notify that related personnel processes in time, avoid the shutdown outside the plan of production equipment to a great extent.
Accompanying drawing explanation
Fig. 1 is the composition structural representation of the embodiment of the present invention;
Fig. 2 is the concrete syndeton schematic diagram of the embodiment of the present invention;
Fig. 3 is the workflow schematic diagram of the embodiment of the present invention.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The present invention is directed to existing process equipment air draft supervisory system sometimes because the reason blast such as airduct obstruction still enough meet setting value requirement, but air quantity and absolute blast are all in non-normal working district, the system failure is caused to affect the problem of producing, as shown in Figure 1, a kind of air draft supervisory system is provided, comprises:
For the driving layer equipment of air draft;
For judge according to the relation between the running parameter of described driving layer equipment when preceding pipeline whether normally and send the processing layer equipment of alerting signal when described pipeline is abnormal.
Wherein, described driving layer equipment at least comprises blower fan and frequency converter; Described running parameter at least comprises the pressure reduction of the rotating speed of described blower fan, electric current and generation; Described processing layer equipment at least comprises programmable controller PLC; Described programmable controller PLC obtains described rotating speed and described electric current by described frequency converter, and described PLC can obtain the correlation parameter of described frequency converter simultaneously, and described correlation parameter at least comprises frequency.
Have three frequency converters in the air draft supervisory system that the embodiment of the present invention provides, frequency converter band one Fans, realize dual-purpose one standby, switch control in turn, when there being one to break down, standby host starts automatically.Programmable controller PLC is wherein kernel control chip, comprises power module, CPU module, number connect test module, analog input and output module and ethernet communication module.
The air draft supervisory system that the embodiment of the present invention provides can utilize the rotating speed of described blower fan, relation between electric current and the pressure reduction of generation to judge, when whether preceding pipeline is normal and send alerting signal when described pipeline is abnormal, to achieve the function of reliable solution blast constant control problem.
Consider the acquisition problem of described pressure reduction, cost and use popularity, the pressure reduction that embodiment of the present invention prioritizing selection differential pressure pickup produces for obtaining described blower fan, and described differential pressure pickup is connected with described processing layer equipment by relevant control line.Other can certainly be adopted can to obtain the element of described pressure reduction, in this citing that differs.
Wherein, differential pressure pickup in the air draft supervisory system that the embodiment of the present invention provides is two; can access in programmable controller PLC simultaneously; by programmable controller PLC software algorithm; to average when realizing normal collection current differential pressure; any one differential pressure pickup is abnormal or can automatically exit air draft supervisory system when keeping in repair, and does not affect the calculating of programmable controller PLC to current differential pressure, improves the reliability of air draft supervisory system.
The air draft supervisory system that the embodiment of the present invention provides also comprises: for detecting the temperature sensor of motor temperature in described blower fan, and described temperature sensor is connected with described frequency converter respectively with the bearing of motor in described blower fan.Can be obtained the actual temperature of motor by temperature sensor, and this temperature value is passed to frequency converter, the too high explanation motor operations of temperature is abnormal.
In general, when adopting Fieldbus Control, all terminal resistance will be added at communication apparatus end, said, the air draft supervisory system that the embodiment of the present invention provides also comprises: for ensure described processing layer equipment to be connected with the communication port of described frequency converter after the terminal resistance of communication robust, described terminal resistance is arranged in the module of the communication port of described frequency converter.
For improving the warning function of the embodiment of the present invention, the air draft supervisory system that the embodiment of the present invention provides also comprises: for accepting described alerting signal that described processing layer equipment sends and carrying out the application layer equipment of reporting to the police, described application layer equipment at least comprises host computer.
The air draft supervisory system that the embodiment of the present invention provides can in process of production airduct block and blast maintains original pressure; but the function being realized remote alarms when production equipment normally works by host computer can not be met; notify that related personnel processes in time, avoid the shutdown outside the plan of production equipment to a great extent.
Meanwhile, host computer described in the air draft supervisory system that the embodiment of the present invention provides adopts redundant system, and host computer described in every platform all can read and monitor three described blower fans; And described host computer adopts industrial automation configuration software Intouch, can realize several functions, comprise: store the running status of equipment, alarm list, setting parameter, curve inquiry, data and the setting of security of system.
In practical application, in the air draft supervisory system that the embodiment of the present invention provides, processing layer equipment needs to carry out being connected the transmission with information, so the air draft supervisory system that the embodiment of the present invention provides also comprises: for connecting the transfer layer equipment of described processing layer equipment and described driving journey equipment or described application layer equipment by other equipment extraneous with driving between layer equipment or application layer equipment; Described transfer layer equipment at least comprises: for connecting the industrial switch of described programmable controller PLC and described host computer; For connecting the Bussing connector of described programmable controller PLC and described frequency converter.
In order to the I/O saving wiring and programmable controller PLC self counts, described in the air draft supervisory system that the embodiment of the present invention provides, transfer layer equipment also comprises: for connecting the remote interface of external device, described remote interface is connected with described programmable controller PLC.
Illustrate the concrete syndeton of the embodiment of the present invention below, as shown in Figure 2, host computer 1 is connected with Programmable Logic Controller (PLC) 3 by industrial switch 2; The communication port that Bussing connector 4 adopts serial method to pass through industrial field bus 5 to connect Programmable Logic Controller (PLC) 3 and 3 frequency converters 6, Programmable Logic Controller (PLC) 3 reads the correlation parameter of frequency converter 6 in real time by the setting of software programming and correlation parameter; Programmable Logic Controller (PLC) 3 is connected with remote interface 7 by relevant control line; Frequency converter 6 is connected with blower fan 8 by relevant control line; Differential pressure pickup 9 is connected with Programmable Logic Controller (PLC) 3 by relevant control line; Temperature sensor 10 is all connected with frequency converter 6 with the motor of blower fan 8; Terminal resistance 11 is placed in the module of the communication port of frequency converter 6.
Need and equipment state according to technique in reality, the air draft supervisory system that the embodiment of the present invention provides can adopt constant-pressure drop mode of operation or constant frequency rate mode of operation.As shown in Figure 2, wherein, under described constant voltage mode of operation, described pressure reduction is constant, described Programmable Logic Controller (PLC) 3 judges whether described rotating speed and described electric current are stabilized in setting range, if not in setting range, to give the alarm signal to described host computer 1, described host computer 1 receives described alerting signal and reports to the police; Under described constant frequency rate mode of operation, described rotating speed and described frequency all constant, described Programmable Logic Controller (PLC) 3 judges whether described electric current and described pressure reduction exceed setting value, if do not exceed setting value, to give the alarm signal to described host computer 1, described host computer 1 receives described alerting signal and reports to the police.
Illustrate the workflow of the embodiment of the present invention below, as shown in Figures 2 and 3, when the mode of operation of artificial selection air draft supervisory system is constant-pressure drop mode of operation, the pressure reduction that blower fan 8 produces is constant, whether Programmable Logic Controller (PLC) 3 is stabilized in setting range by the rotating speed and electric current judging blower fan 8 is determined that whether exhaust system is normal, when abnormal, send alerting signal by Industrial Ethernet network to host computer 1, host computer 1 receives alerting signal and reports to the police; When the mode of operation of artificial selection air draft supervisory system is horizontal frequency operation pattern, the frequency of frequency converter 6 and the rotating speed of blower fan 8 all constant, whether Programmable Logic Controller (PLC) 3 exceedes setting value by the pressure reduction of the electric current and generation that judge blower fan 8 is determined that whether exhaust system is normal, when abnormal, send alerting signal by Industrial Ethernet network to host computer 1, host computer 1 receives alerting signal and reports to the police.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. an air draft supervisory system, is characterized in that, comprising:
For the driving layer equipment of air draft;
For judge according to the relation between the running parameter of described driving layer equipment when preceding pipeline whether normally and send the processing layer equipment of alerting signal when described pipeline is abnormal.
2. air draft supervisory system according to claim 1, is characterized in that, described driving layer equipment at least comprises blower fan and frequency converter; Described running parameter at least comprises the pressure reduction of the rotating speed of described blower fan, electric current and generation; Described processing layer equipment at least comprises programmable controller PLC.
3. air draft supervisory system according to claim 2, it is characterized in that, described programmable controller PLC obtains described rotating speed and described electric current by described frequency converter, and described PLC can obtain the correlation parameter of described frequency converter simultaneously, and described correlation parameter at least comprises frequency.
4. air draft supervisory system according to claim 3, is characterized in that, also comprise:
For obtaining the differential pressure pickup of the pressure reduction that described blower fan produces, described differential pressure pickup is connected with described processing layer equipment by relevant control line.
5. air draft supervisory system according to claim 2, is characterized in that, also comprise:
For detecting the temperature sensor of motor temperature in described blower fan, described temperature sensor is connected with described frequency converter respectively with the bearing of motor in described blower fan.
6. air draft supervisory system according to claim 2, is characterized in that, also comprise:
For ensure described processing layer equipment to be connected with the communication port of described frequency converter after the terminal resistance of communication robust, described terminal resistance is arranged in the module of the communication port of described frequency converter.
7. air draft supervisory system according to claim 2, is characterized in that, also comprise:
For accepting described alerting signal that described processing layer equipment sends and carrying out the application layer equipment of reporting to the police, described application layer equipment at least comprises host computer.
8. air draft supervisory system according to claim 7, is characterized in that, described host computer adopts redundant system, and host computer described in every platform all can read and monitor three described blower fans.
9. air draft supervisory system according to claim 7, is characterized in that, also comprise:
For connecting the transfer layer equipment of described processing layer equipment and described driving journey equipment or described application layer equipment, described transfer layer equipment at least comprises:
For connecting the industrial switch of described programmable controller PLC and described host computer;
For connecting the Bussing connector of described programmable controller PLC and described frequency converter.
10. air draft supervisory system according to claim 9, is characterized in that, described transfer layer equipment also comprises:
For connecting the remote interface of external device, described remote interface is connected with described programmable controller PLC.
11. air draft supervisory systems according to claim 3, is characterized in that, described air draft monitoring system can adopt constant-pressure drop mode of operation or constant frequency rate mode of operation.
12. air draft supervisory systems according to claim 11, it is characterized in that, under described constant voltage mode of operation, described pressure reduction is constant, described programmable controller PLC judges whether described rotating speed and described electric current are stabilized in setting range, if not in setting range, to give the alarm signal to described host computer, described host computer receives described alerting signal and reports to the police; Under described constant frequency rate mode of operation, described rotating speed and described frequency all constant, described programmable controller PLC judges whether described electric current and described pressure reduction exceed setting value, if do not exceed setting value, to give the alarm signal to described host computer, described host computer receives described alerting signal and reports to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410008610.6A CN104765326A (en) | 2014-01-08 | 2014-01-08 | Air discharge monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410008610.6A CN104765326A (en) | 2014-01-08 | 2014-01-08 | Air discharge monitoring system |
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| CN104765326A true CN104765326A (en) | 2015-07-08 |
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| CN201410008610.6A Pending CN104765326A (en) | 2014-01-08 | 2014-01-08 | Air discharge monitoring system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425717A (en) * | 2015-12-23 | 2016-03-23 | 英业达(重庆)有限公司 | Air exhaust monitoring system |
| CN108469809A (en) * | 2018-03-30 | 2018-08-31 | 南京理工大学 | Plc data acquisition, processing and method for uploading based on embedded computer |
| CN112325663A (en) * | 2020-08-21 | 2021-02-05 | 中国测试技术研究院电子研究所 | Intelligent combustor regulation and control method based on smoke discharge amount |
| CN112627897A (en) * | 2020-12-18 | 2021-04-09 | 内蒙古黄陶勒盖煤炭有限责任公司 | Colliery is air circulation system in pit |
| CN115045713A (en) * | 2022-07-26 | 2022-09-13 | 淮南矿业(集团)有限责任公司 | Mine ventilation resistance monitoring system and monitoring method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09319429A (en) * | 1996-05-24 | 1997-12-12 | Nissin Electric Co Ltd | Abnormality monitoring device |
| CN202065011U (en) * | 2011-06-02 | 2011-12-07 | 邯郸市康创电气有限公司 | Monitoring system for main fans in mine shaft |
| CN102465907A (en) * | 2010-11-03 | 2012-05-23 | 无锡华润上华半导体有限公司 | Fan control system and control method |
| CN203024334U (en) * | 2012-12-06 | 2013-06-26 | 南京诺丹工程技术有限公司 | Air-exhaust control system of fume hood |
| CN203114683U (en) * | 2013-01-17 | 2013-08-07 | 东莞市创丰科技发展有限公司 | Fan remote monitoring system |
-
2014
- 2014-01-08 CN CN201410008610.6A patent/CN104765326A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09319429A (en) * | 1996-05-24 | 1997-12-12 | Nissin Electric Co Ltd | Abnormality monitoring device |
| CN102465907A (en) * | 2010-11-03 | 2012-05-23 | 无锡华润上华半导体有限公司 | Fan control system and control method |
| CN202065011U (en) * | 2011-06-02 | 2011-12-07 | 邯郸市康创电气有限公司 | Monitoring system for main fans in mine shaft |
| CN203024334U (en) * | 2012-12-06 | 2013-06-26 | 南京诺丹工程技术有限公司 | Air-exhaust control system of fume hood |
| CN203114683U (en) * | 2013-01-17 | 2013-08-07 | 东莞市创丰科技发展有限公司 | Fan remote monitoring system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425717A (en) * | 2015-12-23 | 2016-03-23 | 英业达(重庆)有限公司 | Air exhaust monitoring system |
| CN108469809A (en) * | 2018-03-30 | 2018-08-31 | 南京理工大学 | Plc data acquisition, processing and method for uploading based on embedded computer |
| CN112325663A (en) * | 2020-08-21 | 2021-02-05 | 中国测试技术研究院电子研究所 | Intelligent combustor regulation and control method based on smoke discharge amount |
| CN112325663B (en) * | 2020-08-21 | 2021-09-21 | 中国测试技术研究院电子研究所 | Intelligent combustor regulation and control method based on smoke discharge amount |
| CN112627897A (en) * | 2020-12-18 | 2021-04-09 | 内蒙古黄陶勒盖煤炭有限责任公司 | Colliery is air circulation system in pit |
| CN115045713A (en) * | 2022-07-26 | 2022-09-13 | 淮南矿业(集团)有限责任公司 | Mine ventilation resistance monitoring system and monitoring method |
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Application publication date: 20150708 |