CN105003292A - Intelligent control system for gas extraction of underground coal roadway and control method of intelligent control system - Google Patents
Intelligent control system for gas extraction of underground coal roadway and control method of intelligent control system Download PDFInfo
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Abstract
The invention provides an intelligent control system for gas extraction of an underground coal roadway and a control method of the intelligent control system, and belongs to intelligent regulation and control of a gas extraction system of a coal mine. The intelligent control system comprises a regulation system and an alarming system; and the regulation system consists of a gas concentration sensor, a flow sensor, an electric valve, a regulation signal acquiring circuit, a single-chip microcomputer, a relay driving circuit and a valve driving circuit. According to a method of the regulation system, the opening degree of the electric valve is sequentially regulated from big to small; the maximum value of pure flow is found out under the condition that requirements on minimum concentration of gas extraction are met; the electric valve is set at the opening degree corresponding to the maximum pure flow and is automatically reset after a period of time; and the above procedures are carried out again. The alarming system consists of a gas concentration sensor, an alarming acquiring circuit, a single-chip microcomputer, a liquid crystal display circuit and a buzzer circuit. According to a method of the alarming system, alarming signals of the gas concentration sensor are processed through the single-chip microcomputer; the buzzer circuit gives an alarm; and the liquid crystal display circuit displays a gas leaking place. By the intelligent control system for gas extraction of the underground coal roadway, extraction is controlled intelligently and an optimum extraction effect is achieved.
Description
Technical field
The present invention relates to a kind of down-hole coal bed tunnel gas pumping intelligence control system and control method, be particularly useful for the best adjustment of the pure flow of gas in the methane gas extraction pipeline of down-hole coal bed tunnel and the judgement of extraction borehole principal fault.
Background technology
The pipeline concentration of China's current down-hole coal bed tunnel gas pumping and the adjustment of negative pressure are entirely by Artificial Control, only by virtue of experience, without any concrete theory and means, and all there is serious sealing of hole gas leakage and connection hole leakage problem in extraction borehole, leakage problem can not Timeliness coverage, takes time and effort.Chinese invention patent (application number 201010591680.0) discloses the device of a kind of underground gas extraction concentration self-control early warning, this device utilizes the electrically operated valve be arranged on extraction pipeline to equal best extraction negative pressure to regulate extraction negative pressure, reaches the object regulating gas density; Chinese invention patent (application number 201220210786.6) discloses a kind of coal extraction system gas intelligent controlling device, and this device utilizes firedamp sensor and electrically operated valve to carry out monitor and forecast gas density.These devices utilize firedamp sensor and electrically operated valve achieve extraction pipeline gas density from main regulation and monitoring.But these devices regulate for gas pumping and only pay close attention to concentration, ignore flow, cause extraction speed excessively slow, affect the extraction cycle when flow is too small, and warning system imperfection, can not leakage problem be solved.
Summary of the invention
The present invention seeks to the above-mentioned weak point overcome in prior art, the system and method for the best adjustment of the pure flow of gas in a kind of underground gas extraction pipeline and the judgement of extraction borehole principal fault is provided.
The technical solution adopted for the present invention to solve the technical problems is as follows:
A kind of down-hole coal bed tunnel gas pumping intelligence control system, is characterized in that: be made up of regulating system and warning system; Described regulating system comprises gas concentration sensor, flow transmitter, electrically operated valve, conditioning signal Acquisition Circuit, single-chip microcomputer, relay drive circuit and valve driving circuit, gas concentration sensor, flow transmitter, electrically operated valve are installed on bye-pass, electrically operated valve connection valve gate drive circuit, valve driving circuit connects relay drive circuit, relay drive circuit connects single-chip microcomputer, and gas concentration sensor, flow transmitter connect relay drive circuit;
Described warning system comprises warning Acquisition Circuit, single-chip microcomputer, buzzer circuit, liquid crystal display circuit and is arranged on the mash gas extraction concentration sensor on each drainage tube, mash gas extraction concentration sensor connects warning Acquisition Circuit, warning Acquisition Circuit connects single-chip microcomputer, and buzzer circuit, liquid crystal display circuit all connect single-chip microcomputer.
The described regulating system course of work: described bye-pass connects main line and some extraction unit and is arranged in stope drift active workings, and the boring of each extraction unit is connected to gathering tube through establishing valvular drainage tube and is connected with bye-pass; Electrically operated valve, gas concentration sensor and flow transmitter are arranged on bye-pass to inner end successively by stope drift active workings outer end.
The course of work of described warning system: will change into an extraction unit at every 10 ~ 15 drainage tubes, gathering tube is installed, is connected to single-chip microcomputer by alarm signal Acquisition Circuit, single-chip microcomputer connects buzzer circuit and liquid crystal display circuit respectively.
A kind of down-hole coal bed tunnel gas pumping intelligent control method comprises following content:
A. first opened completely by electrically operated valve, postpone 10min, the record gas concentration sensor of bye-pass and the reading of flow transmitter are respectively C0 and S0, and the initial value making maximum pure flow max is C0*S0, i=0;
B.i=0 and by electrically operated valve aperture Ki lower 5%, postpone 10min, the record gas concentration sensor of bye-pass and reading Ci and Si of flow transmitter, under gas density Ci is greater than 30% condition that gas density reaches the maximum concentration of gas explosion, when new pure flow Ci*Si is greater than max, aperture Ki Ci*Si being assigned to max and electrically operated valve is assigned to Km, repeat step b, until when the aperture Ki of electrically operated valve is less than 5%, the aperture of electrically operated valve is transferred to Km, time delay 10min;
C. when the reading of the gas concentration sensor of bye-pass be less than that gas density reaches the maximum concentration of gas explosion 30%, jump to step a, if the reading of the gas concentration sensor of bye-pass be still less than that gas density reaches the maximum concentration of gas explosion 30%, then close electrically operated valve;
The control method of warning system is: the gas concentration sensor Ti (i=1 of mark gathering tube, 2,3...n) place position Li, when the reading Ci of the gas concentration sensor of gathering tube to reach 16% of the maximum concentration of gas explosion lower than gas density, buzzer circuit is reported to the police, the place mark Li of display alarm on liquid crystal display circuit;
Every minor tick 10 ~ 20d, resets and resets, rerun routine.
Beneficial effect of the present invention:
(1) the pure flow of pipeline extraction is carried out to the auto-control of science, the manual adjustment solving current gas density and the problem regulated and controled by rule of thumb, from the gas density of gas drainage system and the matching relationship of flow and negative pressure, have found maximum pure flow, drastically increase the extracting result of gas.
(2) under the available condition keeping gas density, improve the flow of gas, shorten the extraction cycle.
(3) can upgrade in time the maximum pure flow value of extraction, obtains the maximum extracting result of different time sections, improve extraction efficiency.
(4) pipeline principal fault can be judged rapidly and be reported to the police, show the position of fault by liquid crystal display circuit, buzzer warning, simple and easy and preparatory good, time saving and energy saving.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the present invention down-hole coal bed tunnel gas pumping intelligence control system.
Fig. 2 is the flow chart of control method of the present invention.
In figure: 1, gas concentration sensor, 2, flow transmitter, 3, electrically operated valve, 4, gas concentration sensor, 5, boring, 6, valve, 7, drainage tube, 8, gathering tube, 9, bye-pass, 10, great Xiang, 11, main line, 12, stope drift active workings, 13, extraction unit; 21, regulating system, 22, warning system, 23, conditioning signal Acquisition Circuit, 24, single-chip microcomputer, 25, relay drive circuit, 26, valve driving circuit, 27, warning Acquisition Circuit, 28, buzzer circuit, 29, liquid crystal display circuit.
Detailed description of the invention
Below in conjunction with accompanying drawing, an example of the present invention is described further:
As shown in Figure 1, a kind of down-hole coal bed tunnel gas pumping intelligence control system, is made up of regulating system 21 and warning system 22; Described regulating system 21 is made up of gas concentration sensor 1, flow transmitter 2, electrically operated valve 3, conditioning signal Acquisition Circuit 23, single-chip microcomputer 24, relay drive circuit 25 and valve driving circuit 26.
Gas concentration sensor 1, flow transmitter 2, electrically operated valve 3 are installed on bye-pass 9, electrically operated valve 3 connection valve gate drive circuit 26, valve driving circuit 26 connects relay drive circuit 25, relay drive circuit 25 connects single-chip microcomputer 24, and gas concentration sensor 1, flow transmitter 2 connect relay drive circuit 25; Gas concentration sensor 1, flow transmitter 2 are in parallel;
Described warning system 22 is made up of gas concentration sensor 4, warning Acquisition Circuit 27, single-chip microcomputer 24, buzzer circuit 28 and liquid crystal display circuit 29.Mash gas extraction concentration sensor connects warning Acquisition Circuit 27, and warning Acquisition Circuit 27 connects single-chip microcomputer 24, and buzzer circuit 28, liquid crystal display circuit 29 all connect single-chip microcomputer 24.
Every 10 ~ 15 drainage tubes 7 are formed one group of extraction unit 13, often organize extraction unit 13 and a gas concentration sensor 4 is installed, in stope drift active workings 12, each boring 5 of extraction unit 13 is connected to gathering tube 8 through drainage tube 7, the mouth of pipe place of drainage tube 7 is provided with valve 6, can close drainage tube 7 during convenient generation principal fault;
Each gathering tube 8 is connected to the main line 11 in large lane 10 through bye-pass 9, is provided with gathering tube 8 to install gas concentration sensor 4 on gathering tube, monitors the gas leakage situation often organizing boring 5.Then, on the bye-pass 9 near main line 11, ecto-entad installs electrically operated valve 3 successively, gas concentration sensor 1 and flow transmitter 2, electrically operated valve 3 is used for controlling the negative pressure in bye-pass 9, gas concentration sensor 1 and flow transmitter 2 are used for measuring the gas density in bye-pass 9 and flow, the signal that they produce carries out filtering by conditioning signal Acquisition Circuit 23, amplify and modulus signal conversion process after, be connected to single-chip microcomputer 24 working procedure, the signal that single-chip microcomputer sends connects valve driving circuit 24 by relay drive circuit 23, the aperture of electrically operated valve 3 is controlled.
After the gas density signal that often group extraction unit produces carries out filtering, amplification and modulus signal conversion process by alarm signal Acquisition Circuit 27, be connected to single-chip microcomputer 24 working procedure, if generation principal fault, buzzer circuit 28 sound of movement is reported to the police, liquid crystal display circuit 29 shows the place of gas leakage, people can find the place of gas leakage soon, finds the boring 5 of gas leakage, and closes the valve in boring on drainage tube 7.
As shown in Figure 2, a kind of down-hole coal bed tunnel gas pumping intelligent control method, comprises following content:
(1) first electrically operated valve 3 is opened completely, postpone the lag time of 10min, make the negative pressure adjustment in bye-pass 9 complete, the reading of record gas concentration sensor 1 now and flow transmitter 2 is respectively C0 and S0, and be C0*S0 by the initial value of maximum pure flow max, make variable i=0, be used for distinguishing the flow under different electrically operated valve aperture and concentration value.
(2) by i=i+1 and the aperture Ki of electrically operated valve 3 lower 5%, postpone 10min, and record reading Ci and Si of gas concentration sensor 1 and flow transmitter 2, under gas density Ci is greater than gas pumping least concentration 30% condition, when new pure flow Ci*Si is greater than max, Ci*Si is assigned to max, the aperture Ki of electrically operated valve 3 is assigned to Km, repeat step (2) until when the aperture Ki of electrically operated valve 3 is less than 5%, then the maximum pure flow of system is found complete, the aperture of electrically operated valve 3 is transferred to Km, time delay 10min, now electrically operated valve 3 has been transferred to the opening value corresponding to maximum pure flow.
(3) when the reading of gas concentration sensor 1 is less than gas pumping least concentration 30%, jump to the beginning of program, in order to not meet under extraction concentration requirement, from the beginning working procedure again, is regulating electrically operated valve to find maximum pure flow; If the reading of gas concentration sensor 1 is still less than gas pumping least concentration 30%, illustrates that the concentration of gas in extraction pipeline is too low, the least concentration requirement of gas pumping can not be met, then need to stop extraction, close electrically operated valve 3.
(4) mark often organize extraction unit 13 place position Li, the position often organizing gas concentration sensor 4 can be shown in warning system 22, when the reading Ci of gas concentration sensor 4 to reach 16% of the maximum concentration of gas explosion lower than gas density, there is explosion danger, boring 5 simultaneously there occurs principal fault, large quantity of air enters pipeline and causes gas density too low, then buzzer circuit 28 is reported to the police, the place mark Li of display alarm on liquid crystal display circuit 29.
(5) interval 10 ~ 20d, reset and reset, rerun routine, realizes the pure flow of gas pumping in the different time stage maximum, reaches better extracting result.
Claims (5)
1. a system for down-hole coal bed tunnel gas pumping Based Intelligent Control, is characterized in that: be made up of regulating system and warning system, described regulating system comprises gas concentration sensor (1), flow transmitter (2), electrically operated valve (3), conditioning signal Acquisition Circuit (23), single-chip microcomputer (24), relay drive circuit (25) and valve driving circuit (26), gas concentration sensor (1), flow transmitter (2), electrically operated valve (3) is installed on bye-pass (9), electrically operated valve (3) connection valve gate drive circuit (26), valve driving circuit (26) connects relay drive circuit (25), relay drive circuit (25) connects single-chip microcomputer (24), gas concentration sensor (1), flow transmitter (2) connects relay drive circuit (25),
The mash gas extraction concentration sensor (4) that described warning system comprises warning Acquisition Circuit (27), single-chip microcomputer (24), buzzer circuit (28), liquid crystal display circuit (29) and is arranged on each drainage tube (7), mash gas extraction concentration sensor connects warning Acquisition Circuit (27), warning Acquisition Circuit (27) connects single-chip microcomputer (24), and buzzer circuit (28), liquid crystal display circuit (29) all connect single-chip microcomputer (24).
2. one according to claim 1 down-hole coal bed tunnel gas pumping intelligence control system, it is characterized in that: described bye-pass (9) connects main line (11) and some extraction unit (13) be arranged in stope drift active workings (12), and the drainage tube (7) of boring (5) through being provided with valve (6) of each extraction unit (13) is connected to gathering tube (8) and is connected with bye-pass (9); Electrically operated valve (3), gas concentration sensor (1) and flow transmitter (2) are arranged on bye-pass (9) to inner end successively by stope drift active workings outer end.
3. a down-hole coal bed tunnel gas pumping intelligent control method, is characterized in that comprising following content:
First opened completely by electrically operated valve (3), postpone 10min, the reading of record gas concentration sensor (1) and flow transmitter (2) is respectively C0 and S0, and the initial value making maximum pure flow max is C0*S0;
The aperture Ki of electrically operated valve (3) is lowered 5%, postpone 10min, reading Ci and Si of record gas concentration sensor (1) and flow transmitter (2), under gas density Ci is greater than gas pumping least concentration 30% condition, when pure flow Ci*Si is greater than max, aperture Ki Ci*Si being assigned to max and electrically operated valve (3) is assigned to Km, repeat step b, until when the aperture Ki of electrically operated valve (3) is less than 5% of maximum opening, the aperture of electrically operated valve (3) is transferred to Km, time delay 10min;
C. when the reading of gas concentration sensor (1) is less than gas pumping least concentration 30%, jump to step a, if the reading of gas concentration sensor (1) is still less than gas pumping least concentration 30%, then close electrically operated valve (3).
4. one according to claim 3 down-hole coal bed tunnel gas pumping intelligent control method, it is characterized in that: mark gas concentration sensor Ti(4) place position Li, as gas concentration sensor Ti(4) reading Ci when reaching 16% of the maximum concentration of gas explosion lower than gas density, buzzer circuit (28) is reported to the police, the place mark Li of the upper display alarm of liquid crystal display circuit (29).
5. the method for a kind of down-hole coal bed tunnel according to claim 3 gas pumping Based Intelligent Control, is characterized in that: interval 10 ~ 20d, resets and resets, rerun routine.
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| CN106285769A (en) * | 2016-08-31 | 2017-01-04 | 郑州光力科技股份有限公司 | Coal mine gas drainage dynamic optimization regulation and control method and system |
| CN106437826A (en) * | 2016-12-14 | 2017-02-22 | 中国矿业大学 | Coal-bed gas extraction method achieving automatic adjustment of negative-pressure drill-hole zoning and source differentiating |
| CN107956467A (en) * | 2017-11-20 | 2018-04-24 | 中国矿业大学(北京) | A kind of high seam pre-draining borehole parameter optimization and the method for extracting result assessment |
| CN108316963A (en) * | 2018-03-01 | 2018-07-24 | 刘晓靖 | Underground coal mine explosion protection system |
| CN108643959A (en) * | 2018-03-01 | 2018-10-12 | 杨帅 | Underground coal mine explosion-proof method |
| CN108798759A (en) * | 2018-04-24 | 2018-11-13 | 山东科技大学 | A kind of concordant hole pumping and mining gas effect evaluation zone metering device up to standard |
| CN110261569A (en) * | 2019-06-21 | 2019-09-20 | 中国矿业大学 | Experimental system for simulating and method based on pipe network system draining coal seam gas effect |
| CN110685732A (en) * | 2019-09-29 | 2020-01-14 | 华北科技学院 | Coal seam drilling gas extraction method based on extraction pipeline valve control |
| CN111502740A (en) * | 2020-03-30 | 2020-08-07 | 北京科技大学 | Unit circulating type pressure pumping integrated gas extraction system and method |
| CN112343646A (en) * | 2020-10-15 | 2021-02-09 | 中国矿业大学 | Intelligent regulation and control system and method for extracting high-concentration gas from coal mine |
| CN112943180A (en) * | 2021-01-28 | 2021-06-11 | 中国矿业大学 | Experimental system and method for simulating gas flow and parameter regulation of gas extraction system |
| CN113503139A (en) * | 2021-09-13 | 2021-10-15 | 中煤科工集团西安研究院有限公司 | In-hole time-delay self-sealing device and using method |
| CN113605866A (en) * | 2021-08-25 | 2021-11-05 | 上海大屯能源股份有限公司孔庄煤矿 | Dynamic regulation and control system and method for mine gas extraction |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106285769B (en) * | 2016-08-31 | 2018-06-05 | 光力科技股份有限公司 | Coal mine gas drainage dynamic optimization regulates and controls method and system |
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| CN106437826A (en) * | 2016-12-14 | 2017-02-22 | 中国矿业大学 | Coal-bed gas extraction method achieving automatic adjustment of negative-pressure drill-hole zoning and source differentiating |
| CN107956467A (en) * | 2017-11-20 | 2018-04-24 | 中国矿业大学(北京) | A kind of high seam pre-draining borehole parameter optimization and the method for extracting result assessment |
| CN108316963A (en) * | 2018-03-01 | 2018-07-24 | 刘晓靖 | Underground coal mine explosion protection system |
| CN108643959A (en) * | 2018-03-01 | 2018-10-12 | 杨帅 | Underground coal mine explosion-proof method |
| CN108798759A (en) * | 2018-04-24 | 2018-11-13 | 山东科技大学 | A kind of concordant hole pumping and mining gas effect evaluation zone metering device up to standard |
| CN110261569B (en) * | 2019-06-21 | 2020-06-12 | 中国矿业大学 | Simulation experiment system and method for coal seam gas extraction effect based on pipe network system |
| CN110261569A (en) * | 2019-06-21 | 2019-09-20 | 中国矿业大学 | Experimental system for simulating and method based on pipe network system draining coal seam gas effect |
| CN110685732A (en) * | 2019-09-29 | 2020-01-14 | 华北科技学院 | Coal seam drilling gas extraction method based on extraction pipeline valve control |
| CN111502740A (en) * | 2020-03-30 | 2020-08-07 | 北京科技大学 | Unit circulating type pressure pumping integrated gas extraction system and method |
| CN112343646A (en) * | 2020-10-15 | 2021-02-09 | 中国矿业大学 | Intelligent regulation and control system and method for extracting high-concentration gas from coal mine |
| CN112343646B (en) * | 2020-10-15 | 2021-08-27 | 中国矿业大学 | Intelligent regulation and control system and method for extracting high-concentration gas from coal mine |
| CN112943180A (en) * | 2021-01-28 | 2021-06-11 | 中国矿业大学 | Experimental system and method for simulating gas flow and parameter regulation of gas extraction system |
| CN112943180B (en) * | 2021-01-28 | 2023-01-17 | 中国矿业大学 | Experimental system and method for simulating gas flow and parameter regulation of gas extraction system |
| CN113605866A (en) * | 2021-08-25 | 2021-11-05 | 上海大屯能源股份有限公司孔庄煤矿 | Dynamic regulation and control system and method for mine gas extraction |
| CN113605866B (en) * | 2021-08-25 | 2024-04-02 | 上海大屯能源股份有限公司孔庄煤矿 | Dynamic regulation and control system and method for mine gas extraction |
| CN113503139A (en) * | 2021-09-13 | 2021-10-15 | 中煤科工集团西安研究院有限公司 | In-hole time-delay self-sealing device and using method |
| CN113503139B (en) * | 2021-09-13 | 2021-12-07 | 中煤科工集团西安研究院有限公司 | In-hole time-delay self-sealing device and using method |
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