CN103728349A - Entire automatic testing method and device for gas desorption speed of resistance-type coal sample - Google Patents
Entire automatic testing method and device for gas desorption speed of resistance-type coal sample Download PDFInfo
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- CN103728349A CN103728349A CN201410020267.7A CN201410020267A CN103728349A CN 103728349 A CN103728349 A CN 103728349A CN 201410020267 A CN201410020267 A CN 201410020267A CN 103728349 A CN103728349 A CN 103728349A
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Abstract
The invention discloses entire automatic testing method and device for gas desorption speed of a resistance-type coal sample. The device comprises a coal sample tank, a resistance-type desorption volume tube and an intelligent module, wherein the intelligent module comprises a current signal collection module, a processing module and a host computer; the coal sample tank is connected with the resistance-type desorption volume tube; a metal guide plate is arranged inside the resistance-type desorption volume tube and connected with a current signal collection module. The testing method comprises the following steps: filling conductive liquid into the resistance-type desorption volume tube; enabling a desorbed gas to enter into the resistance-type desorption volume tube to desorb a current change in a room; collecting a current single by the current signal collection module, and transmitting the collected signal to the processing module; converting the current signal into a volume signal and then transmitting to the host computer by the processing module; generating a time-volume diagram on the host computer, and obtaining the desorption speed from the diagram. By adopting the entire automatic testing method and device, an error in a manual test and waste of labor time are reduced, and the test accuracy is improved.
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 that coal seam gas-bearing capacity is measured, in outburst hazard prediction, prominent development process broken coal Gas, adopt one of key scientific problems of the aspects such as coal breakage Gas and cbm development.The desorption of mash gas rule of coal body can be used for determining coal seam gas-bearing capacity, reflection coal and gas outburst risk, lot of domestic and foreign scholar has carried out a large amount of research to the desorption of mash gas rule of particulate coal, according to desorption of mash gas rule, calculate the loss gas amount in gas bearing capacity mensuration process on the one hand, according to adsorption law, seek outburst danger prediction index and critical value thereof on the other hand.Present stage, the research method of coal gas adsorption law mainly adopted absorption-desorption experiment method, absorption-desorption experiment method is to build laboratory experiment system, carry out the laboratory experiment at coal gas desorb initial stage, by the environmental parameter (being mainly the gas pressure of adsorption equilibrium) of change coal gas desorb and the physical property of experiment coal sample itself, (be mainly metamorphic grade, 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 to measure desorption of mash gas speed and desorption quantity, the main measuring methods of coal sample desorption of mash gas speed and desorption quantity is at present: by the wireway with syringe needle, the gas desorbing is imported in desorb graduated cylinder, graduated cylinder is marked with corresponding scale, at interval of the regular hour, record the reading of liquid volume in graduated cylinder and record desorption rate and desorption quantity.There is certain deficiency in the method:
1. need experimenter to continue 2 hours or longer time record data, waste plenty of time and energy;
2. when reading the scale of liquid volume in cylinder, due to the angle difference that everyone observes liquid level, easily cause reading to have 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 can automatically test gasresolution process, the error while reducing manual testing and artificial waste of 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 are two metallic laminas described resistor-type desorb buret inside, two metallic laminas are connected with current signal collection module by wire respectively, the signal output part of current signal collection module connects the signal input part of processing module, the signal output part of processing module connects main frame by level conversion unit.
Described two metallic laminas are rectangle, are separately fixed at the both sides of resistor-type desorption quantity pipe internal surface, and two metallic laminas are not joined, and it is curved that metallic laminas is attached to resistor-type desorption quantity pipe internal surface.
On described resistor-type desorb buret top, fix two binding posts, two metallic laminas are connected with two binding posts by wire respectively, and two binding posts are connected with current signal collection module by wire respectively.
Described processing module comprises A/D converter, the first processing unit, the 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, the 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.
The resistor-type coal sample desorption of mash gas speed whole-process automatic method of testing that said apparatus is realized, the method comprises the following steps:
A. in the desorption chamber of resistor-type desorb buret, fill with conducting liquid, start intelligent object;
B. coal sample packs coal sample tank into, coal sample tank and resistor-type desorb buret are connected, stripping gas enters resistor-type desorb buret, desorption chamber has conducting liquid to discharge, cause the resistance of conducting liquid in resistor-type desorb buret to change, thereby electric current is changed, and current signal collection module gathers current signal by two metallic laminas and wire;
C. flow signal acquisition module by the current signal transfer collecting to processing module, processing module basis
, wherein
v 1known volume while being full of resistor-type desorb buret for conducting liquid, i.e. the volume of buret,
for the conducting liquid volume change when the time is t,
i 1while being full of resistor-type desorb buret for conducting liquid, record electric current,
i tfor record electric current after conducting liquid volume change when the time is t, obtain the volume change of conducting liquid when the time is t, thereby show that the volume change of the gas of separating sucking-off when the time is t is also
the different volume signals that processing module obtains different time sends main frame to, and on main frame, rise time-volume corresponding relation figure, draws the volume of separating the stripping gas of sucking-off in the unit interval according to this graph of a relation, thereby draw coal sample desorption of mash gas speed, the desorption rate of coal sample gas is
/ t.
Described in step C
the method that draws be: according to
r=
u/
i,
r=
,
s=
dh,
v=
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 collecting,
ρfor the resistivity of conducting liquid,
ssectional area for conducting liquid in desorption chamber during as resistance,
llength for conducting liquid in desorption chamber during as resistance,
dthe width in its cross section during as resistance for conducting liquid in desorption chamber,
hfor the height of liquid level in desorption chamber,
rfor the section radius of desorption chamber.
The method that processing module described in step C is converted into volume signals by current signal is: current signal carries out being input to the first processing unit after mould/number conversion; The first processing unit is converted into volume signals by resistance signal; The first processing unit is transferred to the second processing unit by radio communication unit by volume signals and carries out buffer memory.
The present invention by setting up metallic laminas in common desorb buret, by metallic laminas and wire, connect intelligent object, intelligent object detects the resistance variations of conducting liquid in desorb buret, thereby obtain desorb and go out the volume change of gas, realized the long-pending automatic test of desorption gas, error while having reduced manual testing and artificial waste of time, improved measuring accuracy.According to the variation of resistance, can reflect at any time the variation of volume simultaneously, not have 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, the first processing unit, the 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, the second processing unit connects main frame through level conversion unit, described level conversion unit is electrical level conversion chip.
Resistor-type desorb buret 15 bottoms are firm banking 8, firm banking 8 is provided with draft tube 7 on one side, another side is provided with discharging tube 11, firm banking 8 center sections are feed pathway 9, in feed pathway 9, be provided with liquid flowing valve 10, resistor-type desorb buret 15 inside are provided with two 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 surfaces, metallic laminas 12 is attached on the inside surface of desorb buret 15 curved, resistor-type desorb buret is provided with two binding posts 16 on 15 tops, 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, thereby at the two ends of desorption chamber 13, add a constant voltage.
Coal sample tank 2 is positioned on coal sample tank holder 1, and coal sample tank 2 ports are provided with coal sample cover 3;
Described coal sample tank 2 is connected by wireway 5 with resistor-type desorb buret 15, and wireway 5 one end are 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 ends are connected by connecting pipe 6 and draft tube 7.
The method of carrying out the test of resistor-type coal sample desorption of mash gas speed whole-process automatic with said apparatus, the method comprises the following steps:
First open liquid flowing valve 10, by feed pathway 9, in desorption chamber 13, inject conducting liquid, after filling with, close liquid flowing valve 10, by wire 17, binding post 16 and the current signal collection module of intelligent object 18 are coupled together, start intelligent object 18;
Secondly coal sample is packed in coal sample tank 2, tighten immediately coal sample cover 3, coal sample tank 2 is positioned on coal sample tank holder 1, air guide syringe needle 4 is inserted to coal sample cover 3;
Then intelligent object 18 desorption process of test gas automatically, stripping gas enters resistor-type desorb buret 15, resistor-type desorb buret 15 has conducting liquid to discharge, cause the resistance of conducting liquid in resistor-type desorb buret 15 to change, thereby electric current is wherein changed, and current signal collection module gathers current signal by metallic laminas 12 and wire 17; Current signal collection module is by the current signal transfer collecting to A/D converter, and A/D converter is transferred to the first processing unit by this signal after simulating signal is converted to digital signal, the first processing unit processes module basis
, wherein
v 1known volume while being full of resistor-type desorb buret for conducting liquid (volume of buret),
for the conducting liquid volume change when the time is t,
i 1while being full of resistor-type desorb buret for conducting liquid, record electric current,
i tfor record electric current after conducting liquid volume change when the time is t, obtain the volume change of conducting liquid when the time is t, thereby show that the volume change of the gas of separating sucking-off when the time is t is
, wherein
draw according to being:
r=
u/I,
r=
,
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 collecting,
ρthe resistivity of conducting liquid,
ssectional area for conducting liquid in desorption chamber during as resistance,
llength for conducting liquid in desorption chamber during as resistance,
dthe width in its cross section during as resistance for conducting liquid in desorption chamber,
hfor the height of liquid level in desorption chamber,
rfor the section radius of desorption chamber.
Then the first processing unit is transferred to the second processing unit through radio communication unit by this volume signals, the different volume signals that volume signals obtains different time through level conversion unit through buffer memory in the second processing unit sends main frame to, rise time-volume corresponding relation figure on main frame, the reading that transverse axis reading t is the time, longitudinal axis reading
for the reading of volume, according to this graph of a relation, draw the volume of separating the stripping gas of sucking-off in the unit interval, the desorption rate of coal sample gas is
/ t.
The present invention has realized the whole-process automatic test of coal sample desorption of mash gas speed, and the error while having reduced manual testing and artificial waste of time, improved measuring accuracy.Due to the variation of resistance, can reflect in time the variation of volume simultaneously, not have delay issue.
Claims (7)
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 are two metallic laminas described resistor-type desorb buret inside, two metallic laminas are connected with current signal collection module by wire respectively, and the signal output part of current signal collection module connects the signal input part of processing module, the signal output part of processing module connects main frame by level conversion 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 metallic laminas are rectangle, be separately fixed at the both sides of resistor-type desorption quantity pipe internal surface, two metallic laminas are not joined, 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: on described resistor-type desorb buret top, fix two binding posts, two metallic laminas are connected with two binding posts by wire respectively, and two binding posts are connected with current signal collection module by wire respectively.
4. resistor-type coal sample desorption of mash gas speed whole-process automatic proving installation according to claim 1, it is characterized in that: described processing module comprises A/D converter, the first processing unit, the 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, the 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.
5. application rights requires 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 is realized, and it is characterized in that: the method comprises the following steps:
In the desorption chamber of resistor-type desorb buret, fill with conducting liquid, start intelligent object;
Coal sample packs coal sample tank into, coal sample tank and resistor-type desorb buret are connected, stripping gas enters resistor-type desorb buret, desorption chamber has conducting liquid to discharge, cause the resistance of conducting liquid in resistor-type desorb buret to change, thereby electric current is changed, and current signal collection module gathers current signal by two metallic laminas and wire;
Current signal collection module by the current signal transfer collecting to processing module, processing module basis
, wherein
v 1known volume while being full of resistor-type desorb buret for conducting liquid, i.e. the volume of buret,
for the conducting liquid volume change when the time is t,
i 1while being full of resistor-type desorb buret for conducting liquid, record electric current,
i tfor record electric current after conducting liquid volume change when the time is t, obtain the volume change of conducting liquid when the time is t, thereby show that the volume change of the gas of separating sucking-off when the time is t is also
the different volume signals that processing module obtains different time sends main frame to, and on main frame, rise time-volume corresponding relation figure, draws the volume of separating the stripping gas of sucking-off in the unit interval according to this graph of a relation, thereby draw coal sample desorption of mash gas speed, the desorption rate of coal sample gas is
/ t.
6. resistor-type coal sample desorption of mash gas speed whole-process automatic method of testing according to claim 5, is characterized in that: described in step C
the method that draws be: according to
r=
u/
i,
r=
,
s=
dh,
v=
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 collecting,
ρfor the resistivity of conducting liquid,
ssectional area for conducting liquid in desorption chamber during as resistance,
llength for conducting liquid in desorption chamber during as resistance,
dthe width in its cross section during as resistance for conducting liquid in desorption chamber,
hfor the height of liquid level in desorption chamber,
rfor the section radius of desorption chamber.
7. resistor-type coal sample desorption of mash gas speed whole-process automatic method of testing according to claim 5, is characterized in that: the method that the processing module described in step C is converted into volume signals by current signal is: current signal carries out being input to the first processing unit after mould/number conversion; The first processing unit is converted into volume signals by resistance signal; The first processing unit is transferred to the second processing unit by radio communication unit by volume signals and carries out buffer memory.
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| 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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