CN103728349B - Resistor-type coal sample desorption of mash gas speed whole-process automatic method of testing and device - Google Patents
Resistor-type coal sample desorption of mash gas speed whole-process automatic method of testing and device Download PDFInfo
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Abstract
The invention discloses a kind of resistor-type coal sample desorption of mash gas speed whole-process automatic method of testing and device, this device comprises coal sample tank, resistor-type desorb buret and intelligent object, intelligent object comprises current signal collection module, processing module and main frame, coal sample tank is connected with resistor-type desorb buret, there is metallic laminas resistor-type desorb buret inside, and metallic laminas connects current signal collection module.This method of testing: fill conducting liquid in resistor-type desorb buret; Stripping gas enters resistor-type desorb buret, curent change in desorption chamber, current signal collection module gathers current signal, and the signal collected is passed to processing module, processing module passes to main frame after current signal is converted into volume signals, on main frame rise time-volume relationship figure, draw desorption rate by this graph of a relation.Error when The present invention reduces manual testing and the waste of manual time, improve measuring accuracy.
Description
Technical field
The invention belongs to gas desorption experiment device technical field, particularly a kind of resistor-type coal sample desorption of mash gas speed whole-process automatic method of testing and device.
Background technology
Particulate coal desorption of mash gas rule is one of the Gas, the key scientific problems of adopting the aspects such as coal breakage Gas and cbm development of broken coal in coal seam gas-bearing capacity mensuration, outburst hazard prediction, prominent development process.The desorption of mash gas rule of coal body can be used for determining that coal seam gas-bearing capacity, reflection coal and gas prominent are dangerous, the desorption of mash gas rule of lot of domestic and foreign scholar to particulate coal has carried out large quantifier elimination, calculate the loss gas amount in gas bearing capacity mensuration process according to desorption of mash gas rule on the one hand, seek outburst danger prediction index and critical value thereof according to adsorption law on the other hand.Present stage, the research method of coal gas adsorption law mainly adopted absorption-desorption experiment method, absorption-desorption experiment method builds laboratory experiment system, carry out the laboratory experiment at coal gas desorb initial stage, by changing the environmental parameter (mainly the gas pressure of adsorption equilibrium) of coal gas desorb and testing physical property (the mainly metamorphic grade of coal sample itself, destructiveness, granularity etc.) study the desorption of mash gas initial stage rule of coal body, but the desorption of mash gas initial stage rule of research coal body, mainly measure desorption of mash gas speed and desorption quantity, the main measuring methods of current coal sample desorption of mash gas speed and desorption quantity is: import in desorb graduated cylinder by being with the wireway of syringe needle by the gas desorbed, graduated cylinder is marked with corresponding scale, desorption rate and desorption quantity is recorded at interval of the reading of liquid volume in regular hour record graduated cylinder.There is certain deficiency in the method:
1. need experimenter to continue 2 hours or the longer time records data, waste plenty of time and energy;
2., when reading the scale of liquid volume in cylinder, the angle of observing liquid level due to everyone is different, easily causes reading to there is error;
3. when reading the scale of liquid volume in cylinder, experimenter needs limit to record coal sample desorption time, and limit record data, easily cause temporal error.
Summary of the invention
The object of this invention is to provide a kind of method and the device that automatically can test gasresolution process, error during minimizing manual testing and the waste of manual time.
For achieving the above object, technical scheme of the present invention is: resistor-type coal sample desorption of mash gas speed whole-process automatic proving installation, comprise coal sample tank, intelligent object and resistor-type desorb buret, described intelligent object comprises current signal collection module, processing module and main frame, there is two panels metallic laminas described resistor-type desorb buret inside, two panels metallic laminas is connected with current signal collection module respectively by wire, the signal input part of the signal output part connection handling module of current signal collection module, the signal output part of processing module connects main frame by level conversion unit.
Described two panels metallic laminas is rectangle, is separately fixed at the both sides of resistor-type desorption quantity pipe internal surface, and two metallic laminas do not connect, and it is curved that metallic laminas is attached to resistor-type desorption quantity pipe internal surface.
Two binding posts are fixed on described resistor-type desorb buret top, and two panels metallic laminas is connected with two binding posts respectively by wire, and two binding posts are connected with current signal collection module respectively by wire.
Described processing module comprises A/D converter, first processing unit, second processing unit and radio communication unit, the signal input part of A/D converter connects the signal output part of current signal collection module, the signal output part of A/D converter connects the signal input part of the first processing unit, the signal output part of the first processing unit connects the signal input part of the second processing unit by radio communication unit, second processing unit connects level conversion unit, wherein the first processing unit and the second processing unit are single-chip microcomputer, level conversion unit is electrical level conversion chip.Simulating signal is converted to digital signal by A/D converter; The current signal of the digital format after A/D converter conversion is converted into volume signals by the first processing unit; The volume signals that first processing unit draws is wirelessly transmitted to the second processing unit by radio communication unit; The volume signals that the first processing unit received is transmitted by radio communication unit is carried out buffer memory by the second processing unit.
The resistor-type coal sample desorption of mash gas speed whole-process automatic method of testing that said apparatus realizes, the method comprises the following steps:
A. in the desorption chamber of resistor-type desorb buret, fill conducting liquid, start intelligent object;
B. coal sample loads coal sample tank, coal sample tank and resistor-type desorb buret are connected, stripping gas enters resistor-type desorb buret, desorption chamber has conducting liquid to discharge, the resistance of conducting liquid in resistor-type desorb buret is caused to change, thus electric current is changed, current signal collection module gathers current signal by two panels metallic laminas and wire;
C. flow signal acquisition module by the current signal transfer that collects to processing module, processing module according to
v t =
v 1 (1-
i t / I 1 ), wherein
v 1 for known volume, the i.e. volume of buret when conducting liquid is full of resistor-type desorb buret,
v t for when the time being
ttime conducting liquid volume change,
i 1for recording electric current when conducting liquid is full of resistor-type desorb buret,
i t for when the time being
ttime conducting liquid volume change after record electric current, obtain and when the time be
ttime conducting liquid volume change, thus draw when the time and be
ttime separate sucking-off the volume change of gas be also
v t the different volume signals that different time obtains by processing module sends main frame to, on main frame rise time-volume corresponding relation figure, draw in the unit interval volume of the stripping gas separating sucking-off according to this graph of a relation, thus drawing coal sample desorption of mash gas speed, then the desorption rate of coal sample gas is
v t /
t.
Described in step C
v t =
v 1 (1-
i t / I 1 ) the method that draws be: according to
r=
u/
i,
r=
ρ L/S,
s=
dh,
v=
π r 2 hdraw, wherein
rfor the resistance of conducting liquid,
ufor being added in the voltage at desorption chamber two ends,
ifor the current signal collected,
ρfor the resistivity of conducting liquid,
sfor the area of the metallic laminas as electrode,
lbe the distance between two metallic laminas,
dfor the width of the metallic laminas as electrode,
hfor the height of liquid level in desorption chamber,
rfor the section radius of desorption chamber.
The method that current signal is converted into volume signals by the processing module described in step C is: current signal is input to the first processing unit after carrying out analog/digital conversion; Current signal is converted into volume signals by the first processing unit; Volume signals is transferred to the second processing unit by radio communication unit and carries out buffer memory by the first processing unit.
The present invention by setting up metallic laminas in common desorb buret, intelligent object is connected by metallic laminas and wire, intelligent object carries out the resistance variations detecting conducting liquid in desorb buret, thus obtain the volume change that desorb goes out gas, achieve the automatic test of stripping gas volume, error when decreasing manual testing and the waste of manual time, improve measuring accuracy.The change of volume can be reflected simultaneously according to the change of resistance at any time, there is not delay issue.
Accompanying drawing explanation
Fig. 1 is the general structure schematic diagram of apparatus of the present invention;
Fig. 2 is the theory diagram of intelligent object in Fig. 1.
Wherein: coal sample tank holder 1, coal sample tank 2, coal sample cover 3, air guide syringe needle 4, wireway 5, connecting pipe 6, draft tube 7, firm banking 8, feed pathway 9, liquid flowing valve 10, discharging tube 11, metallic laminas 12, desorption chamber 13, scale 14, resistor-type desorb buret 15, binding post 16, wire 17, intelligent object 18.
Embodiment
As shown in Figures 1 and 2, resistor-type coal sample desorption of mash gas speed whole-process automatic proving installation, comprise coal sample tank 2, resistor-type desorb buret 15 and intelligent object 18, intelligent object 18 comprises current signal collection module, processing module and main frame, described processing module comprises A/D converter, first processing unit, second processing unit and radio communication unit, the signal input part of A/D converter connects current signal collection module, the signal output part of A/D converter connects the signal input part of the first processing unit, the signal output part of the first processing unit connects the signal input part of the second processing unit by radio communication unit, second processing unit connects main frame through level conversion unit, described level conversion unit is electrical level conversion chip.
Resistor-type desorb buret 15 bottom is firm banking 8, firm banking 8 is while be provided with draft tube 7, another side is provided with discharging tube 11, firm banking 8 center section is feed pathway 9, feed pathway 9 is provided with liquid flowing valve 10, resistor-type desorb buret 15 inside is provided with two panels metallic laminas 12, described metallic laminas 12 is rectangle, two metallic laminas 12 are fixed on the both sides of resistor-type desorb buret 15 inside surface, curved on the inside surface that metallic laminas 12 is attached to desorb buret 15, top is provided with two binding posts 16 to resistor-type desorb buret 15, metallic laminas 12 is connected with binding post 16 by wire 17, binding post 16 connects current signal collection module by wire 17, power supply connects two binding posts 16, thus a constant voltage is added at the two ends of desorption chamber 13.
Coal sample tank 2 is positioned on coal sample tank holder 1, and coal sample tank 2 port is provided with coal sample cover 3;
Described coal sample tank 2 and resistor-type desorb buret 15 is connected by wireway 5, and wireway 5 one end is provided with air guide syringe needle 4, and air guide syringe needle 4 inserts coal sample cover 3 and realizes and being communicated with of coal sample tank 2, and wireway 5 other end is connected by connecting pipe 6 and draft tube 7.
Carry out the method for resistor-type coal sample desorption of mash gas speed whole-process automatic test with said apparatus, the method comprises the following steps:
First open liquid flowing valve 10, in desorption chamber 13, inject conducting liquid by feed pathway 9, after filling, close liquid flowing valve 10, by wire 17, the current signal collection module of binding post 16 with intelligent object 18 is coupled together, start intelligent object 18;
Secondly coal sample is loaded in coal sample tank 2, tighten coal sample cover 3 immediately, coal sample tank 2 is positioned on coal sample tank holder 1, air guide syringe needle 4 is inserted coal sample cover 3;
Then intelligent object 18 tests the desorption process of gas automatically, stripping gas enters resistor-type desorb buret 15, then resistor-type desorb buret 15 has conducting liquid to discharge, the resistance of conducting liquid in resistor-type desorb buret 15 is caused to change, thus electric current is wherein changed, current signal collection module gathers current signal by metallic laminas 12 and wire 17; Current signal collection module is by the current signal transfer that collects to A/D converter, and simulating signal to be converted to after digital signal by this Signal transmissions to the first processing unit by A/D converter, the first processing unit processes module according to
v t =
v 1 (1-
i t / I 1 ), wherein
v 1for known volume (volume of buret) when conducting liquid is full of resistor-type desorb buret,
v t for when the time being
ttime conducting liquid volume change,
i 1 for recording electric current when conducting liquid is full of resistor-type desorb buret,
i tfor when the time being
ttime conducting liquid volume change after record electric current, obtain and when the time be
ttime conducting liquid volume change, thus draw when the time and be
ttime separate sucking-off the volume change of gas be
v t , wherein
v t =
v 1 (1-
i t / I 1 ) draw according to being:
r=
u/I,
r=
ρ L/S,
s=Dh,
v=π r 2 h, wherein
rfor the resistance of conducting liquid,
ufor being added in the voltage at desorption chamber two ends,
ifor the current signal collected,
ρthe resistivity of conducting liquid,
sfor the area of the metallic laminas as electrode,
lbe the distance between two metallic laminas,
dfor the width of the metallic laminas as electrode,
hfor the height of liquid level in desorption chamber,
rfor the section radius of desorption chamber.
Then this volume signals is transferred to the second processing unit through radio communication unit by the first processing unit, the different volume signals that different time obtains through level conversion unit through buffer memory by volume signals in the second processing unit sends main frame to, on main frame rise time-volume corresponding relation figure, transverse axis reading
tfor the reading of time, longitudinal axis reading
v t for the reading of volume, draw in the unit interval volume of the stripping gas separating sucking-off according to this graph of a relation, then the desorption rate of coal sample gas is
v t /
t.
Present invention achieves the whole-process automatic test of coal sample desorption of mash gas speed, error when decreasing manual testing and the waste of manual time, improve measuring accuracy.Simultaneously because the change of resistance can reflect the change of volume in time, there is not delay issue.
Claims (6)
1. resistor-type coal sample desorption of mash gas speed whole-process automatic proving installation, comprise coal sample tank, it is characterized in that: also comprise intelligent object and resistor-type desorb buret, described intelligent object comprises current signal collection module, processing module and main frame, there is two panels metallic laminas described resistor-type desorb buret inside, two panels metallic laminas is connected with current signal collection module respectively by wire, and the signal input part of signal output part connection handling module, the signal output part of processing module of current signal collection module connect main frame by level conversion unit, described processing module comprises A/D converter, first processing unit, second processing unit and radio communication unit, the signal input part of A/D converter connects the signal output part of current signal collection module, the signal output part of A/D converter connects the signal input part of the first processing unit, the signal output part of the first processing unit connects the signal input part of the second processing unit by radio communication unit, second processing unit connects level conversion unit, wherein the first processing unit and the second processing unit are single-chip microcomputer, level conversion unit is electrical level conversion chip,
Simulating signal is converted to digital signal by A/D converter;
The current signal of the digital format after A/D converter conversion is converted into volume signals by the first processing unit;
The volume signals that first processing unit draws is wirelessly transmitted to the second processing unit by radio communication unit;
The volume signals that the first processing unit received is transmitted by radio communication unit is carried out buffer memory by the second processing unit.
2. resistor-type coal sample desorption of mash gas speed whole-process automatic proving installation according to claim 1, it is characterized in that: described two panels metallic laminas is rectangle, be separately fixed at the both sides of resistor-type desorption quantity pipe internal surface, two metallic laminas do not connect, and it is curved that metallic laminas is attached to resistor-type desorption quantity pipe internal surface.
3. resistor-type coal sample desorption of mash gas speed whole-process automatic proving installation according to claim 1, it is characterized in that: two binding posts are fixed on described resistor-type desorb buret top, two panels metallic laminas is connected with two binding posts respectively by wire, and two binding posts are connected with current signal collection module respectively by wire.
4. application rights requires to it is characterized in that the resistor-type coal sample desorption of mash gas speed whole-process automatic method of testing that the resistor-type coal sample desorption of mash gas speed whole-process automatic proving installation described in 1 realizes: the method comprises the following steps:
A fills conducting liquid in the desorption chamber of resistor-type desorb buret, starts intelligent object;
B coal sample loads coal sample tank, coal sample tank and resistor-type desorb buret are connected, stripping gas enters resistor-type desorb buret, desorption chamber has conducting liquid to discharge, the resistance of conducting liquid in resistor-type desorb buret is caused to change, thus electric current is changed, current signal collection module gathers current signal by two panels metallic laminas and wire;
C current signal collection module by the current signal transfer that collects to processing module, processing module according to
v t =
v 1 (1-
i t / I 1 ), wherein
v 1 for known volume, the i.e. volume of buret when conducting liquid is full of resistor-type desorb buret,
v t for when the time being
ttime conducting liquid volume change,
i 1 for recording electric current when conducting liquid is full of resistor-type desorb buret,
i t for when the time being
ttime conducting liquid volume change after record electric current, obtain and when the time be
ttime conducting liquid volume change, thus draw when the time and be
ttime separate sucking-off the volume change of gas be also
v t the different volume signals that different time obtains by processing module sends main frame to, on main frame rise time-volume corresponding relation figure, draw in the unit interval volume of the stripping gas separating sucking-off according to this graph of a relation, thus drawing coal sample desorption of mash gas speed, then the desorption rate of coal sample gas is
v t /
t.
5. resistor-type coal sample desorption of mash gas speed whole-process automatic method of testing according to claim 4, is characterized in that: described in step C
v t =
v 1 (1-
i t / I 1 ) the method that draws be: according to
r=
u/
i,
r=
ρ L/S,
s=
dh,
v=
π r 2 hdraw, wherein
rfor the resistance of conducting liquid,
ufor being added in the voltage at desorption chamber two ends,
ifor the current signal collected,
ρfor the resistivity of conducting liquid,
sfor the area of the metallic laminas as electrode,
lbe the distance between two metallic laminas,
dfor the width of the metallic laminas as electrode,
hfor the height of liquid level in desorption chamber,
rfor the section radius of desorption chamber.
6. resistor-type coal sample desorption of mash gas speed whole-process automatic method of testing according to claim 4, is characterized in that: the method that current signal is converted into volume signals by the processing module described in step C is: current signal is input to the first processing unit after carrying out analog/digital conversion; Current signal is converted into volume signals by the first processing unit; Volume signals is transferred to the second processing unit by radio communication unit and carries out buffer memory by the first processing unit.
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| CN105203176A (en) * | 2014-06-11 | 2015-12-30 | 孟尧 | Novel fluid-discharge method gas amount metering device |
| CN107727528A (en) * | 2017-09-30 | 2018-02-23 | 河南理工大学 | The desorption of mash gas speed detecting method and device of a kind of no accumulated error |
| CN108625900A (en) * | 2018-07-11 | 2018-10-09 | 贵州安和矿业科技工程股份有限公司 | A kind of fire damp solves analyzer and application method automatically |
| CN110568027A (en) * | 2019-09-29 | 2019-12-13 | 中国矿业大学(北京) | Coal rock adsorption and desorption integrated resistivity measurement system |
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| CN2898898Y (en) * | 2006-04-03 | 2007-05-09 | 迟景强 | Multi-point liquid-level controlling switch |
| CN201311416Y (en) * | 2008-12-11 | 2009-09-16 | 煤炭科学研究总院重庆研究院 | Underground gas desorption rate tester |
| JP2011247806A (en) * | 2010-05-28 | 2011-12-08 | Aisin Seiki Co Ltd | Level detection device |
| JP2012154840A (en) * | 2011-01-27 | 2012-08-16 | Kinotech Solar Energy Corp | Liquid level gauge |
| CN102607990B (en) * | 2012-03-05 | 2016-06-01 | 河南理工大学 | A kind of whole-process automatic test device of coal sample desorption of mash gas speed |
| CN202710434U (en) * | 2012-06-11 | 2013-01-30 | 煤炭科学研究总院沈阳研究院 | Gas desorption instrument |
| CN203011791U (en) * | 2012-12-20 | 2013-06-19 | 河南理工大学 | Gas absorption/desorption testing device |
| CN103335916A (en) * | 2013-06-04 | 2013-10-02 | 河南理工大学 | Experiment device for initial laws of tectonic coal gas desorption |
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