CN201028976Y - Mining gas drawing-out multi-parameter measurer with negative pressure compensation function - Google Patents
Mining gas drawing-out multi-parameter measurer with negative pressure compensation function Download PDFInfo
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- CN201028976Y CN201028976Y CNU2006200324158U CN200620032415U CN201028976Y CN 201028976 Y CN201028976 Y CN 201028976Y CN U2006200324158 U CNU2006200324158 U CN U2006200324158U CN 200620032415 U CN200620032415 U CN 200620032415U CN 201028976 Y CN201028976 Y CN 201028976Y
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Abstract
The utility model relates to a mining gas drawing-out multi-parameter measurer capable of measuring the parameters such as flux and pressure, belonging to the field of gas measurer used in the exploitation process of the coal and metal mines. In the measurer, a flowmeter and a pressure sensor are connected in series on a pipeline between the gas inlet and the gas outlet in the measurer. A negative pressure compensation electric air pump is connected in series on the pipeline, and the number for the pressure sensor is two, wherein, one is positioned on the gas inlet pipeline and the other is positioned on the gas outlet pipeline, and two sensors are connected with a processing and control circuit through a pressure signal collecting circuit. The output of the processing and control circuit controls the rotating speed of the gas pump motor through a drive circuit, thereby realizing the balance of air pressure between the gas inlet and the gas outlet.
Description
Technical field
The utility model relates to a kind of mining gas discharging multi-parameter measuring instrument, belongs to the measuring instrument of methane gas in the recovery process of mines such as coal, metal, measures flow, pressure and other parameters.
Background technology
Methane gas in the recovery process of mines such as coal, metal (mainly being the potpourri of gases such as methane and air) is very dangerous, the careless slightly fire damp that can cause explodes, and therefore the monitoring to methane gas is that mine safeties such as coal, metal are produced one of most important project.
China mainly takes the control of fire damp gas at present: carry out extraction in boring of the high-risk district of gas face and pipe laying.Its concrete enforcement is with face boring uniformly and installation gas drainage " son " pipe, then valve of many " son " manifold merga pass is installed on gas drainage " mother " pipe in the underworkings, fully utilize (natural gas energy resource) by one or more high-power gas suction pump extraction direct discharging atmosphere or after purifying, the detection of methane gas overall target is very important equally in this a series of extraction process, the firstth, for safety in production provides data parameters, second can measure that pumping volume is used for data preparation so that gas is purified, and sell as marketable natural gas the back.
It is main that to take out the pipe isoparametric measurement of methane concentration, gas flow, gaseous tension, gas temperature of " mother " pipe just be by the uninterrupted online acquisition that is installed in various sensing transducers such as methane on the person in charge, flow, pressure, temperature.And every releasing pipe (" son " pipeline) is also loaded onto such on-line sensor, and the complicacy angle of controlling from economy, technology all is unpractical.At each block up to a hundred arms are just arranged, and the flow of releasing pipe inside and negative pressure fluctuation range are big, and (flow is from 5～500L/min), and using the flow sensor of existing single range is accurately to measure so wide flow rate fluctuation scope.On technology angle, certain complicacy is arranged also.
Portable gas drainage multi-parameter measurer is called for short the gas drainage instrument can measure prior mounted monitoring pipe joint on the arm, by flexible pipe instrument is serially connected on the arm and measures.After the end to be measured, take away the connection that is serially connected in the instrument on the arm and recovers former pipeline, prepare next root arm is measured.In this a series of actions, because former branch pipe(tube) disconnects and serial connection is gone into the gas drainage instrument, and the air resistance of the air resistance of former arm cut-off point and gas drainage instrument inner air path be inequality also can't be identical, cause the bronchus flow behind serial connection gas drainage instrument different, cause that apparatus measures flow and real traffic have certain error with the bronchus flow that is not connected in series the gas drainage instrument.
The utility model content
At the problems referred to above, task of the present utility model provides a kind of mining gas discharging multi-parameter measuring instrument with negative pressure compensating function, with the air resistance of gas drainage instrument inner air path the apparatus measures flow is conformed in order to the air resistance of offsetting former arm cut-off point as far as possible with real traffic when measuring.
For finishing above-mentioned task, the technical solution of the utility model is: a kind of mining gas discharging multi-parameter measuring instrument with negative pressure compensating function, be equipped with flowmeter on the pipeline in instrument between air intake opening and the gas outlet, on above-mentioned pipeline, also be equipped with the negative pressure compensating electric air pump, on air intake opening and place, gas outlet pipeline, be separately installed with a pressure transducer, two pressure transducers are connected with control and treatment circuit by the air pressure signal Acquisition Circuit, the output of control and treatment circuit is by the rotating speed of driving circuit control air pump motor, realize the air pressure balance between air intake opening and the gas outlet, thereby offset the gas-flow resistance that instrument produces.
Control and treatment circuit is the single-chip microcomputer treatment circuit.
The air pressure signal Acquisition Circuit is made up of a slice analog switch and a slice AD converter, the gating of two baroceptors of analog switch control, and the switching time of Single-chip Controlling analog switch, AD converter is that digital signal is sent into single-chip microcomputer with the air pressure analog signal conversion.
Control and treatment circuit adopts pulse width modulation mode to adjust air pump motor rotating speed, the square wave different according to the height output pulse width of inlet, outlet draught head.
The on-off circuit that driving circuit is made of two triodes, the output of control and treatment circuit reaches the effect of regulating airshed by the break-make of this driving circuit control air pump motor power supply.
This device in instrument, be equipped with on the pipeline negative pressure compensating electric air pump and and go out to install two baroceptors in air intake opening and gas outlet, two sensors are connected with control and treatment circuit by the air pressure signal Acquisition Circuit, the output of control and treatment circuit realizes the air pressure balance between air intake opening and the gas outlet by driving circuit control air pump motor rotating speed.The parameter that the utility model can configure according to instrument with measure airshed what and carry out negative pressure compensating automatically, significantly reduced the negative pressure difference of measuring in passage and the actual tube passage, more real reaction arm airshed.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is a principle of work block diagram of the present utility model;
Fig. 3 is circuit theory diagrams of the present utility model;
Fig. 4 is a sequential chart of the present utility model.
Embodiment
As Fig. 1,2,3, shown in 4, mining gas discharging multi-parameter measuring instrument with negative pressure compensating function of the present utility model, be equipped with flowmeter 2 on the pipeline in instrument 6 between air intake opening and the gas outlet, on above-mentioned pipeline, also be equipped with negative pressure compensating electric air pump 4, on air intake opening and place, gas outlet pipeline, be separately installed with a pressure transducer 1 (P1), 5 (P2), two pressure transducers are connected with control and treatment circuit by the air pressure signal Acquisition Circuit that is contained on the circuit board 3, the output of control and treatment circuit is by the rotating speed of driving circuit control air pump motor, realize the air pressure balance between air intake opening and the gas outlet, thereby offset the gas-flow resistance that instrument produces.In the hardware circuit, two baroceptor P1, P2: the ASDX030 baroceptor of selecting for use Honeywell company to produce, range 0～30PSI; Precision 2%Vfss; Response time 8ms; Working temperature-20～105 ℃; Output signal 0～4V.Air pressure signal Acquisition Circuit: form by a slice 4051 analog switches and a slice 12 bit A/D converters 1241.The gating of two baroceptors of analog switch control, the switching time of Single-chip Controlling analog switch, AD converter 1241 is that digital signal is sent into single-chip microcomputer with the air pressure analog signal conversion.Single-chip microcomputer is selected AT89C2051 for use, and volume is little, and function is strong.Adopt pulse width modulation mode to adjust the air pump motor rotating speed, the square wave that single-chip microcomputer is different according to the height output pulse width of air inlet/outlet draught head reaches the effect of adjusting airshed by the break-make of two triodes 9013 and 3DD6 control air pump motor power supply.The vacuum pump that adopts direct current generator to drive, motor power supply rated voltage 9V, electric current 1A.Power supply adopts 3 string 1.8Ah lithium battery power supplies, voltage 9～12.6V
This measuring instrument is measured the draught head of gas circuit air inlet/outlet, and Single Chip Microcomputer (SCM) system can be controlled the airshed of negative pressure compensating gas circuit according to the draught head of air inlet/outlet, and is equal until the air pressure of air inlet/outlet.
When gas (methane) gas was flowed through the flow negative pressure transducer by the arm air intake opening, two kinds of sensors were measured methane gas flow, bronchus negative pressure respectively, and these electric signal are changed through amplification, D/A, one tunnel transmission from one channel to another DATA REASONING display system; Another road transmission from one channel to another negative pressure pump control circuit, adjust the operating voltage of negative pressure pump automatically according to the apparatus measures value, the rotating speed that makes negative pressure pump changes according to the negative pressure differential of instrument internal inlet, outlet, and Negative Pressure Difference increases, the working speed of negative pressure pump also improves, and rate of air sucked in required also increases thereupon; Opposite Negative Pressure Difference reduces, and the working speed of negative pressure pump also reduces, and rate of air sucked in required also reduces thereupon.The negative pressure differential that can play the instrument internal air inlet/outlet is approximately equal to 0, thereby compensated in the extraction feed channel serial connection flow loss that instrument caused automatically, the flow when making serial connection apparatus measures in the extraction branch pipe(tube) really is similar to the original flow when not being connected in series instrument in the extraction branch pipe(tube).
Claims (5)
1. mining gas discharging multi-parameter measuring instrument with negative pressure compensating function, be equipped with flowmeter on the pipeline in instrument between air intake opening and the gas outlet, it is characterized in that, on above-mentioned pipeline, also be equipped with the negative pressure compensating electric air pump, on air intake opening and place, gas outlet pipeline, be separately installed with a pressure transducer, two pressure transducers are connected with control and treatment circuit by the air pressure signal Acquisition Circuit, and the output of control and treatment circuit is by the rotating speed of driving circuit control air pump motor.
2. mining gas discharging multi-parameter measuring instrument according to claim 1 is characterized in that, control and treatment circuit is the single-chip microcomputer treatment circuit.
3. mining gas discharging multi-parameter measuring instrument according to claim 1 and 2, it is characterized in that, the air pressure signal Acquisition Circuit is made up of a slice analog switch and a slice AD converter, the gating of two baroceptors of analog switch control, the switching time of Single-chip Controlling analog switch, AD converter is that digital signal is sent into single-chip microcomputer with the air pressure analog signal conversion.
4. mining gas discharging multi-parameter measuring instrument according to claim 3 is characterized in that, control and treatment circuit adopts pulse width modulation mode to adjust the air pump motor rotating speed.
5. mining gas discharging multi-parameter measuring instrument according to claim 4, it is characterized in that, the on-off circuit that driving circuit is made of two triodes, the output of control and treatment circuit reaches the effect of regulating airshed by the break-make of this driving circuit control air pump motor power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200324158U CN201028976Y (en) | 2006-09-06 | 2006-09-06 | Mining gas drawing-out multi-parameter measurer with negative pressure compensation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200324158U CN201028976Y (en) | 2006-09-06 | 2006-09-06 | Mining gas drawing-out multi-parameter measurer with negative pressure compensation function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201028976Y true CN201028976Y (en) | 2008-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200324158U Expired - Fee Related CN201028976Y (en) | 2006-09-06 | 2006-09-06 | Mining gas drawing-out multi-parameter measurer with negative pressure compensation function |
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| CN (1) | CN201028976Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139933B (en) * | 2006-09-06 | 2010-08-11 | 郑州市光力科技发展有限公司 | Mining gas discharging multi-parameter measuring instrument having negative pressure compensating function |
| CN105241502A (en) * | 2015-10-15 | 2016-01-13 | 华北理工大学 | Gas parameter measuring device for water-containing coal seam through dynamic balance method |
| CN110513140A (en) * | 2019-07-26 | 2019-11-29 | 中国矿业大学 | A kind of control system and method promoting the efficient mash gas extraction of coal seam network security |
-
2006
- 2006-09-06 CN CNU2006200324158U patent/CN201028976Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139933B (en) * | 2006-09-06 | 2010-08-11 | 郑州市光力科技发展有限公司 | Mining gas discharging multi-parameter measuring instrument having negative pressure compensating function |
| CN105241502A (en) * | 2015-10-15 | 2016-01-13 | 华北理工大学 | Gas parameter measuring device for water-containing coal seam through dynamic balance method |
| CN110513140A (en) * | 2019-07-26 | 2019-11-29 | 中国矿业大学 | A kind of control system and method promoting the efficient mash gas extraction of coal seam network security |
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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 |
Granted publication date: 20080227 Termination date: 20140906 |
|
| EXPY | Termination of patent right or utility model |