CN202693509U - Coalmine methane detection device - Google Patents
Coalmine methane detection device Download PDFInfo
- Publication number
- CN202693509U CN202693509U CN 201220204810 CN201220204810U CN202693509U CN 202693509 U CN202693509 U CN 202693509U CN 201220204810 CN201220204810 CN 201220204810 CN 201220204810 U CN201220204810 U CN 201220204810U CN 202693509 U CN202693509 U CN 202693509U
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- methane
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- signal processing
- transducer
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 243
- 238000001514 detection method Methods 0.000 title abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 239000003245 coal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The utility model relates to a coalmine methane detection device which comprises an uninterruptible power supply, an intrinsically safe power supply and a methane sensor, wherein a methane signal processing module is arranged in the detection device, the module comprises a signal conversion unit, a light emitting diode set, a NAND (NOT AND) gate judging unit, a driving unit and a relay, a methane concentration current signal and a frequency signal corresponding to the current signal are simultaneously gathered by an input end of the module through the methane sensor, the current signal and the frequency signal are synchronously converted into standard analog signals by the signal conversion unit, and the standard analog signals are transmitted to the NAND gate judging unit to be judged by the light emitting diode set. When the methane concentration signal exceeds the standard, a corresponding 5mA constant current power-off signal is output by the methane signal processing module. Otherwise, when the methane sensor has a failure and is powered off, the corresponding frequency signal cannot be obtained by the input end of the methane signal processing module. An alarm signal is sent out by the relay of the driving unit from an output end of the methane signal processing module.
Description
Technical field
The utility model relates to a kind of safety monitoring device, especially a kind of methane pick-up unit for coal mine roadway.
Background technology
Traditional methane pick-up unit based on the colliery generally all is by uninterrupted power source, the methane that intrinsic safety electric source and methane transducer form detects basic circuit, although this methane detects the methane concentration that basic circuit also can be monitored coal mine roadway under normal circumstances, but also there is certain potential safety hazard, for example, when the feed circuit of methane transducer break down or the situation such as inner open circuit, when methane transducer can't work, this moment coal mine roadway actual being in without monitor state of methane, even methane concentration exceeds standard, people still can't recognize dangerous existence, and this must cause larger potential safety hazard.
In view of defects, how improving the power supply of methane Check processing module and methane detection system has become those skilled in the art's technical matters in the urgent need to address.
The utility model content
The purpose of this utility model, the problem that methane transducer can't be worked when having solved the development machine outage, whether this control system not only can detect methane and exceed standard, can also judge whether methane transducer cuts off the power supply, fault, greatly improved Coal mine methane detection technique level, reduced methane and detected misinterpretation.
The purpose of this utility model is achieved in that a kind of methane pick-up unit based on the colliery, comprise uninterrupted power source, intrinsic safety electric source and methane transducer, it is characterized in that: also be provided with the methane signal processing module in the pick-up unit, described methane signal processing module comprises signal conversion unit, the light emitting diode group, the Sheffer stroke gate judging unit, driver element, relay, the input end of described methane signal processing module by methane transducer gather simultaneously methane concentration current signal and with the linearly proportional frequency signal of this current signal, the safety current signal that wherein current signal comprises and methane concentration safety is corresponding and the constant current power-off signal that exceeds standard corresponding with methane concentration; Signal conversion unit passes to the Sheffer stroke gate judgment unit judges by the light emitting diode group after converting described current signal and frequency signal to standard analog signal synchronously again;
When the methane concentration signal exceeds standard, the methane signal processing module will be exported corresponding 5mA constant current power-off signal, or when methane transducer breaks down and cuts off the power supply, the input end of methane signal processing module can't obtain corresponding frequency signal, send alerting signal by the relay of driver element from the output terminal of methane signal processing module.
In the technical solution of the utility model: the methane signal processing module is provided with at least one group and sends the output terminal that methane detects information.
In the technical solution of the utility model: the frequency signal corresponding with this concentration signal that sends during the methane transducer normal operation is 200Hz-1000Hz, when methane transducer breaks down, corresponding frequency signal is less than 200Hz, when methane transducer cut off the power supply, corresponding frequency signal was 0Hz; Methane transducer provide when power-off signal equals 5mA or frequency signal during less than 200Hz, the output terminal of methane signal processing module all can send alerting signal.
The utility model has the advantage of: owing in pick-up unit, also being provided with the methane signal processing module, the methane signal processing module gathers two signals of methane transducer, that is: the 200Hz-1000Hz frequency signal that sends during the normal operation of corresponding 5mA constant current power-off signal and methane transducer when methane concentration exceeds standard, no matter be any abnormal signal, that is: when power-off signal equals 5mA, or frequency signal is during less than 200Hz, alerting signal is sent in the capital, realize the two monitoring to methane concentration and methane transducer duty, improved the reliability based on the methane pick-up unit in colliery.
Can send the output terminals that methane detects information because the methane signal processing module is provided with many groups, namely can be sent to PLC by these output signals, or start emergency equipment (such as ventilation equipment etc.), or send alerting signals etc. to a plurality of workplaces simultaneously.
Description of drawings
Fig. 1 is the electrical principle block diagram of the utility model control system;
Fig. 2 is the electrical schematic diagram of methane signal processing module.
Among the figure, 1, the UPS uninterrupted power source; 2, intrinsic safety electric source; 3, methane signal processing module; 4, methane transducer.
Embodiment
Accompanying drawing discloses the electrical schematic diagram of the utility model embodiment without limitation, below in conjunction with accompanying drawing the utility model is done to describe further.
As seen from Figure 1, the utility model is by uninterrupted power source 1, on the basis of the basic methane pick-up unit that intrinsic safety electric source 2 and methane transducer 4 form, set up methane signal processing module 3, the input end of methane signal processing module 3 by methane transducer 4 gather simultaneously methane concentration current signal and with the linearly proportional frequency signal of this current signal, wherein current signal comprises the safety current signal corresponding with methane concentration safety and the constant current power-off signal that exceeds standard corresponding with methane concentration, they form standard analog signal by change-over circuit corresponding in the converting unit, after standard analog signal passes through the Sheffer stroke gate judgment unit judges again by the light emitting diode group, send corresponding signal by the drive unit drives relay from the output terminal of methane signal processing module 3; When power-off signal equals 5mA, or frequency signal is during less than 200Hz, and the output terminal of methane signal processing module all can send alerting signal, otherwise output terminal all sends safety signal.In the present embodiment, signal 1 is corresponding to the current signal corresponding with methane concentration, and signal 2 is corresponding to the frequency signal of reflection methane transducer 4 duties.
In the present embodiment, it is intrinsic safety electric source 2 uninterrupted power supplies that uninterrupted power source 1 connects the 220V alternating current, and intrinsic safety electric source 2 converts the 12V direct current to and provides working power for methane transducer 4 and methane signal processing module 3.
As seen from Figure 2, described methane signal processing module comprises signal conversion unit, light emitting diode group, Sheffer stroke gate judging unit, driver element, relay, during work, when the input end of methane signal processing module 3 gathers simultaneously methane concentration and exceeds standard by methane transducer 4 current signal of corresponding methane concentration and with the linearly proportional frequency signal of this current signal, signal conversion unit converts current signal and the frequency signal of methane to standard analog signal synchronously, and standard analog signal passes through the Sheffer stroke gate judgment unit judges again by the light emitting diode group;
When the methane concentration signal exceeds standard, methane signal processing module 3 will be inputted corresponding constant current power-off signal, or when methane transducer 4 breaks down, the frequency signal that the input end of methane signal processing module 3 obtains will be less than 200Hz, when methane transducer 4 outage, the input end of methane signal processing module 3 can't obtain corresponding frequency signal, no matter be that the methane concentration signal is when exceeding standard, or when methane transducer 4 breaks down and cuts off the power supply, send alerting signal by the relay of driver element from the output terminal of methane signal processing module 3.
In the present embodiment, methane signal processing module 3 has three output terminals, and each output terminal is provided with two two contacts of closing of opening, and driver element changes the position of contact described in the output terminal by three relays.
Can regulate alarm parameters according to sensitivity or the operating characteristic of methane transducer 4 in the use, for example, if select the methane transducer 4 of KG9701A (0.00-4.00) %CH4 model, when methane reaches selection adjusting alarm parameters, power-off signal equals 5mA, or when methane transducer 4 when how reason causes frequency signal less than 200Hz, the output terminal of methane signal processing module 3 all can send alerting signal, otherwise output terminal all can send safety signal.
Claims (3)
1. methane pick-up unit based on the colliery, comprise uninterrupted power source, intrinsic safety electric source and methane transducer, it is characterized in that: also be provided with the methane signal processing module in the pick-up unit, described methane signal processing module comprises signal conversion unit, the light emitting diode group, the Sheffer stroke gate judging unit, driver element, relay, the input end of described methane signal processing module by methane transducer gather simultaneously methane concentration current signal and with the linearly proportional frequency signal of this current signal, the safety current signal that wherein current signal comprises and methane concentration safety is corresponding and the constant current power-off signal that exceeds standard corresponding with methane concentration; Signal conversion unit passes to the Sheffer stroke gate judgment unit judges by the light emitting diode group after converting described current signal and frequency signal to standard analog signal synchronously again;
When the methane concentration signal exceeds standard, the methane signal processing module will be inputted corresponding 5mA constant current power-off signal, or when methane transducer breaks down and cuts off the power supply, the input end of methane signal processing module can't obtain corresponding frequency signal, send alerting signal by the relay of driver element from the output terminal of methane signal processing module.
2. the methane pick-up unit based on the colliery according to claim 1 is characterized in that: the methane signal processing module is provided with at least one group and sends the output terminal that methane detects information.
3. the methane pick-up unit based on the colliery according to claim 1, it is characterized in that: the frequency signal corresponding with this concentration signal that sends during the methane transducer normal operation is 200Hz-1000Hz, when methane transducer breaks down, corresponding frequency signal is less than 200Hz, when methane transducer cut off the power supply, corresponding frequency signal was 0Hz; Methane transducer provide when power-off signal equals 5mA or frequency signal during less than 200Hz, the output terminal of methane signal processing module all can send alerting signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220204810 CN202693509U (en) | 2012-05-08 | 2012-05-08 | Coalmine methane detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220204810 CN202693509U (en) | 2012-05-08 | 2012-05-08 | Coalmine methane detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202693509U true CN202693509U (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220204810 Expired - Fee Related CN202693509U (en) | 2012-05-08 | 2012-05-08 | Coalmine methane detection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202693509U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109607389A (en) * | 2018-12-29 | 2019-04-12 | 沙尔夫矿山机械（徐州）有限公司 | A kind of mining diesel engine monorail crane locomotive methane measurement protection shutdown system |
-
2012
- 2012-05-08 CN CN 201220204810 patent/CN202693509U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109607389A (en) * | 2018-12-29 | 2019-04-12 | 沙尔夫矿山机械（徐州）有限公司 | A kind of mining diesel engine monorail crane locomotive methane measurement protection shutdown system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20180508 |