CN102270374B - CO gas detection alarm device - Google Patents
CO gas detection alarm device Download PDFInfo
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- CN102270374B CN102270374B CN 201110121765 CN201110121765A CN102270374B CN 102270374 B CN102270374 B CN 102270374B CN 201110121765 CN201110121765 CN 201110121765 CN 201110121765 A CN201110121765 A CN 201110121765A CN 102270374 B CN102270374 B CN 102270374B
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Abstract
The invention, which belongs to the harmful gas detection technology field, relates to a CO gas detection alarm device. The alarm device comprises a CO gas detection alarm signal processing master control circuit, an electrochemical sensor, a CO gas detection PPM value LCD display and a CO gas detection audible-visual alarm. The alarm device is characterized in that: a relay K coil and a relay K contact switch are additionally installed, wherein the relay K coil and the relay K contact switch are capable of protecting the electrochemical sensor and are controlled by the CO gas detection alarm signal processing master control system circuit and a one-ship microcomputer output signal CPU program. In addition, the CO gas detection alarm signal processing master control circuit simultaneously emits an RS485 signal and a 4-20m ACO gas concentration PPM value analog quantity signal, so that an alarm signal is accessed to other systems by a network; therefore, it is possible that a gas leakage accident can be dealt with timely.
Description
Technical field
The invention belongs to harmful gas detection technique field, be specifically related to a kind of CO gas detection alarm device.
Background technology
Smelter all can give off a large amount of coal gas that contains the CO gas componant in coking, ironmaking, steelmaking process, all to carry by conveyance conduit, at conveyance conduit a large amount of gas dewatering devices is installed, be easy to occur gas leakage in these places that gas dewatering device is installed, cause security incident.Therefore, in the place that gas dewatering device is installed, often the CO gas detection alarm device to be installed.And the CO gas-monitoring detectors that provides in the market is single, when having the CO Leakage Gas to occur, can only send continuously CO gas detection alarm signal, transmit channel and lack more signal, and send in the high concentration CO gas detection alarm situation in long-time continuous, electrochemical sensor in the alarm can lose measuring ability very soon, causes reporting to the police losing efficacy.And electrochemical sensor accounts for cost half in the CO gas detection alarm device, causes very large economic loss.
Summary of the invention
The purpose of this invention is to provide a kind of CO gas detection alarm device that has improved, can effectively overcome the shortcoming that prior art exists.
The present invention is achieved in that it includes CO gas detection alarm signal and processes governor circuit, electrochemical sensor, CO gas detection PPM value LCD display and CO gas detection audible-visual annunciator.It is characterized in that having set up by CO gas detection alarm signal and process the programme controlled relay K coil of governor circuit single-chip microcomputer output signal CPU, the contact switch of relay K is being processed in the electrochemical sensor supply line that the master control system circuit is connected with CO gas detection alarm signal.
Designing requirement is in the situation of full scale 2000PPM; when detecting the CO gas concentration above 1500PPM; the singlechip CPU program start regularly; the CO gas concentration continues to surpass 1500PPM after 1 minute, sends guarded command DO1, and pilot relay K coil gets electric; open relay contact switch K; cut off electrochemical sensor and power to protect sensor, keep CO gas detection this moment PPM value constant, send the CO detectable concentration PPM value signal of this moment.After 8 minutes; cancellation guarded command DO1; pilot relay K coil losing electricity; closed relay contact switch K recovers the electrochemical sensor power supply, continues the concentration of analyzing and testing CO gas; the CO gas concentration still continues 1 minute above 1500PPM; again send guarded command DO, cut off electrochemical sensor and power to protect sensor, again recover the electrochemical sensor power supply after 8 minutes.Go round and begin again, prolong electrochemical sensor serviceable life, reduce use cost.
In addition, co gas detection alarm signal is processed governor circuit and is sent simultaneously RS485 signal and 4-20mA CO gas concentration PPM value analog signals, the RS485 signal send the CO detection alarm to local multichannel centralized control RTU station, 4-20mA signal is issued technological process PLC control system, also send simultaneously two-way CO gas concentration DO alerting signal (DO2, DO3), set in the alarm door limit value singlechip CPU program, one the tunnel send technological process PLC control system, improve the reliability of alarm monitoring, local subsidiary explosion-proof audible-visual annunciator is sent on another road, the prompting warning message.Wherein, technological process PLC control system is connected into higher level's energy medium supervisory system by network, and warning message is presented on plant area's geographic map, and coal gas protection station can promptly and accurately be arrived in, and makes the accident of generation in time be solved processing.
Advantage of the present invention and good effect are: 1. make electrochemical sensor obtain timely power-off protection, prolonged serviceable life; 2. increased the multiple signals sending function, when the CO Leakage Gas occured, accident was in time solved processing.
Description of drawings:
Fig. 1 is prior art CO gas detection alarm device synoptic diagram
Fig. 2 is the multi-functional CO gas detection alarm device of the present invention synoptic diagram
Among the figure 1,2,2`---supply line
The output of 3-------------CO gas concentration PPM value RS485 signal
3`-----------CO gas concentration PPM value RS485/4-20mA signal output
The output of 4-------------CO gas concentration PPM value LCD display
The output of 5-------------CO gas concentration DO2 sound and light alarm signal
6-------------CO gas high concentration, the output of guarded command DO1 signal
The output of 7-------------CO gas concentration PPM value 4-20mA signal
The output of 8-------------CO gas high concentration DO3 alerting signal
K-------------relay coil and electric shock switch
Specific implementation method:
As shown in Figure 2; when the CO gas detection alarm device detected the CO gas concentration continue to surpass 1500PPM in 1 minute; send immediately guarded command DO1; pilot relay K coil gets electric; open relay contact switch K; the power supply of cut-out electrochemical sensor, the protection electrochemical sensor is not damaged.After 8 minutes; cancellation guarded command DO1; pilot relay K coil losing electricity; closed relay contact switch K recovers the electrochemical sensor power supply, continues the concentration of analyzing and testing CO gas; the CO gas concentration still continues 1 minute above 1500PPM; again send guarded command DO1, cut off electrochemical sensor and power to protect sensor, again recover the electrochemical sensor power supply after 8 minutes.Go round and begin again, prolong electrochemical sensor serviceable life.Simultaneously, keep CO gas detection this moment PPM value constant, the CO detectable concentration PPM value signal and the alerting signal that send this moment detect multichannel centralized control RTU station and technological process PLC control system to PPM value LCD display, audible-visual annunciator, CO, reach except reporting to the police, show the basic function, but centralized control and be beneficial to the function such as accident rescue response also.
Claims (1)
1. CO gas detection alarm device, it includes, and CO gas detection alarm signal is processed governor circuit, electrochemical sensor, CO gas detects PPM value LCD display and CO gas detects audible-visual annunciator, it is characterized in that setting up by CO gas detection alarm signal and process the programme controlled relay K coil of governor circuit single-chip microcomputer output signal CPU, the contact switch of relay K is being processed in the electrochemical sensor supply line that governor circuit is connected with CO gas detection alarm signal; Designing requirement is in the situation of full scale 2000PPM, when detecting the CO gas concentration above 1500PPM, the singlechip CPU program start regularly, when the CO gas concentration continues to surpass 1500PPM after 1 minute, send guarded command pilot relay K coil and get electricly, open relay contact switch K, cut off electrochemical sensor and power to protect sensor, keep CO gas detection this moment PPM value constant, send the CO detectable concentration PPM value signal of this moment; After 8 minutes, cancellation guarded command pilot relay K coil losing electricity, closed relay contact switch K, the power supply of recovery electrochemical sensor, continue the concentration of analyzing and testing CO gas, the CO gas concentration still continues 1 minute above 1500PPM, again sends guarded command, cut off electrochemical sensor and power to protect sensor, again recover the electrochemical sensor power supply after 8 minutes; So repeatedly, make electrochemical sensor avoid too early damage; In addition, CO gas detection alarm signal is processed governor circuit and is sent simultaneously RS485 signal and 4-20mA CO gas concentration PPM value analog signals, the RS485 signal send the local multichannel centralized control of CO detection alarm RTU station, 4-20mA signal is to technological process PLC control system, technological process PLC control system is connected into higher level's energy medium supervisory system by network, warning message is presented on plant area's geographic map, and coal gas protection station can promptly and accurately be arrived in, and makes accident in time be solved processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110121765 CN102270374B (en) | 2011-05-12 | 2011-05-12 | CO gas detection alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110121765 CN102270374B (en) | 2011-05-12 | 2011-05-12 | CO gas detection alarm device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102270374A CN102270374A (en) | 2011-12-07 |
| CN102270374B true CN102270374B (en) | 2013-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110121765 Active CN102270374B (en) | 2011-05-12 | 2011-05-12 | CO gas detection alarm device |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103208168B (en) * | 2013-01-31 | 2016-05-25 | 杨如祥 | Coal gas monitoring alarm method |
| CN103177536B (en) * | 2013-03-06 | 2015-05-20 | 南京梅山冶金发展有限公司 | Gas detecting and alarming system and controlling method thereof for annular shaft kiln |
| CN103345274A (en) * | 2013-06-28 | 2013-10-09 | 桑德环境资源股份有限公司 | Method for detecting concentration of hazardous gas |
| CN104916081A (en) * | 2015-05-20 | 2015-09-16 | 安庆师范学院 | Low-cost industrial carbon monoxide leakage alarm and control method thereof |
| CN105021775B (en) * | 2015-07-27 | 2017-11-17 | 煤炭科学技术研究院有限公司 | Multi-parameter gas detector |
| CN105605735A (en) * | 2015-12-31 | 2016-05-25 | 浙江科技学院 | Hydrogen gas automatically-monitoring and actively-protecting device and method |
| CN109597386A (en) * | 2018-07-17 | 2019-04-09 | 柳州钢铁股份有限公司 | Iron-smelter gas alarm instrument centralized monitoring system and method |
| CN112206916A (en) * | 2020-09-26 | 2021-01-12 | 国家能源菏泽发电有限公司 | Coal pulverizer and primary air powder pipe online monitoring system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2091459U (en) * | 1991-03-27 | 1991-12-25 | 北京军区后勤部军事医学研究所 | Carbon monoxide detecting alarm protecting instrument |
| CN2203766Y (en) * | 1994-04-18 | 1995-07-19 | 赵金宝 | Automatic cut-off device for overproof CO of gas water-heater |
| US6503141B2 (en) * | 1997-08-20 | 2003-01-07 | Julio Shtanko | Carbon monoxide venting system |
-
2011
- 2011-05-12 CN CN 201110121765 patent/CN102270374B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2091459U (en) * | 1991-03-27 | 1991-12-25 | 北京军区后勤部军事医学研究所 | Carbon monoxide detecting alarm protecting instrument |
| CN2203766Y (en) * | 1994-04-18 | 1995-07-19 | 赵金宝 | Automatic cut-off device for overproof CO of gas water-heater |
| US6503141B2 (en) * | 1997-08-20 | 2003-01-07 | Julio Shtanko | Carbon monoxide venting system |
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| CN102270374A (en) | 2011-12-07 |
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