CN104990865B - Coal is to the experimental system and experimental method of desorption of mash gas feature under measure vibration condition - Google Patents
Coal is to the experimental system and experimental method of desorption of mash gas feature under measure vibration condition Download PDFInfo
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Abstract
It measures coal under vibration condition and, to the experimental system and experimental method of desorption of mash gas feature, belongs to technical field of mine safety.Experimental system：Including frequency conversion vibration system, vibration monitor system, coal sample crushing system, degassing system, gas adsorption system and desorption of mash gas system；Frequency conversion vibration system includes vibrating motor, shaking platform, shock-absorbing spring, engine base, frequency converter, power knob and external potentiometer, vibrating motor is fixed on shaking platform, shaking platform is arranged on above engine base, is connected between shaking platform and engine base by shock-absorbing spring；The first eccentric hammer and the second eccentric hammer are respectively arranged in the upper/lower terminal of vibrating motor, vibrating motor, potentiometer and power knob are connected respectively with frequency converter.Experimental method：Desorption experiment method is crushed to the adsorption and desorption experiment method and coal sample of gas including coal under different vibration conditions.The present invention can measure coal under different vibration conditions to the Adsorption and desorption characteristics of gas and crush Desorption characteristics.
Description
Technical field
The invention belongs to technical field of mine safety, and gas is inhaled more particularly to coal under a kind of different vibration conditions of measure
Attached Desorption characteristics and the experimental system and experimental method for crushing Desorption characteristics.
Background technology
Previous coal does not consider influence of the oscillatory load to coal sample adsorption-desorption to the adsorption and desorption experiment system of gas.Coal
In ore deposit mining work activities there are coalcutter coal cutting disturbance, underground blasting vibration, ore deposit pressure show, ore deposit shake, a variety of vibration sources such as bump,
Effect of vibration causes adhesive force of the gas on coal body skeleton surface to reduce, while the thermal energy for vibrating generation makes coal temperature liter
Height, by Lang Gemiaoer adsorption curves it is found that coal continuously decreases the suction-operated of gas as temperature increases；On the other hand, by
Initial fissure is developed again inside vibration effect coal body, increases coal body gas permeability；Therefore, effect of vibration desorbs coal gas
It is diffused with larger facilitation.Existing experimental system cannot reflect shadow of the mining active process dither effect to coal adsorption-desorption gas
It rings.
At present, the experimental system of research coal sample crushing process desorption quantity does not consider adsorption law during different vibration conditions.By
Differed in different vibrational perturbation activities, vibration amplitude, vibration frequency, vibration velocity etc., vibrate generation fuel factor and
There is different to coal body degree of crushing etc., there is also differents for desorption of mash gas rule.Coal sample crushing process, difference vibration
Intensity also has coal sample adsorption law certain influence, and current experimental system is only limitted to study final desorption total amount, it is impossible to complete
In pairs under difference vibration conditions in coal sample crushing process adsorption law experiment.
Invention content
In view of the problems of the existing technology, the present invention provide it is a kind of measure vibration condition under coal to desorption of mash gas feature
Experimental system and experimental method, the present invention can measure coal under different vibration conditions and the Adsorption and desorption characteristics of gas and crushing solved
Inhale feature.
To achieve these goals, the present invention adopts the following technical scheme that：Coal is to gas solution under a kind of measure vibration condition
The experimental system of feature is inhaled, including frequency conversion vibration system, vibration monitor system, coal sample crushing system, degassing system, gas adsorption
System and desorption of mash gas system；
The frequency conversion vibration system include vibrating motor, shaking platform, shock-absorbing spring, engine base, frequency converter, power knob and
External potentiometer, the vibrating motor are fixed on shaking platform, and shaking platform is arranged on above engine base, shaking platform and engine base
Between be connected by shock-absorbing spring；The first eccentric hammer and second are respectively arranged in the upper/lower terminal of the vibrating motor
Eccentric hammer, the vibrating motor, potentiometer and power knob are connected respectively with frequency converter；
The vibration monitor system includes vibrating sensor and vibration parameters analyzer, and the vibrating sensor, which is fixed on, to shake
On moving platform, it is connected with vibration parameters analyzer；
The coal sample crushing system includes material alms bowl and impact block, and the material alms bowl is mounted on shaking platform, and impact block is placed
In material alms bowl；The material alms bowl is configured with sealing cover, and gas nozzle is provided on sealing cover；Walking beam is provided on shaking platform,
Walking beam is in contact with material alms bowl sealing cover；
The degassing system includes vacuum pump, third control valve, the 5th control valve, vacuum gauge and vacuum meter, described true
Sky pump is connected with one end of third control valve, and the other end of third control valve is all the way through the 5th control valve with expecting on alms bowl sealing cover
Gas nozzle be connected, another way is connected through vacuum gauge with vacuum meter；
The gas adsorption system includes gas cylinder, the first control valve, pressure regulator valve, pressure gauge and the second control valve, institute
The first control valve of outlet for stating gas cylinder is connected with one end of pressure regulator valve, and the other end of pressure regulator valve is through pressure gauge and second
One end of control valve is connected, and the other end of the second control valve is connected with the gas nozzle on material alms bowl sealing cover；
The desorption of mash gas system includes desorption of mash gas speed determinator and the 4th control valve, and the desorption of mash gas speed is surveyed
Determine instrument to be fixed in sink, thermometer is provided in sink；The desorption of mash gas speed determinator by the 4th control valve with
Gas nozzle on material alms bowl sealing cover is connected.
There are six the shock-absorbing spring settings, and the shaft of shock-absorbing spring and vibrating motor is arranged in parallel.
The groove of installation material alms bowl is provided on the shaking platform, material alms bowl is mounted in the groove.
Two handles are provided on the material alms bowl.
The impact block is cylinder, is made of hard alloy steel.
The junction of the material alms bowl and sealing cover is provided with gasket.
The gas nozzle uses cored screw type, and the bottom end of gas nozzle extend on the inside of material alms bowl sealing cover, is connected with material alms bowl cavity
It is logical.
Rubber pad is provided between the walking beam and material alms bowl sealing cover.
Compression handle is provided on the shaking platform, walking beam is fixed sealing cover by compression handle.
Using coal under the measure vibration condition to the experimental method of the experimental system of desorption of mash gas feature, including difference
Coal crushes desorption experiment method to coal sample under the adsorption and desorption experiment method of gas and different vibration conditions under vibration condition；
Coal includes the following steps the adsorption and desorption experiment method of gas under different vibration conditions：
Step 1：Prepare before experiment
In fresh getting working face coal wall samples of coal pulled, send to laboratory after tightly encapsulating, coal sample is made
Granular or standard square body or cuboid test specimen, and be put into insulating box and dry；The impact block expected in alms bowl is taken out, experimentation
Impact block is not placed in middle material alms bowl；Whether each pipeline connects the air-tightness of reliable and each air-breather in inspection system, first, high
Air bottle carries out airtight test using nitrogen gas cylinder；The second control valve is closed, opens the first control valve, observed pressure table shows
Whether number is stablized, stable then air tight, adjusts pressure regulator valve at a slow speed, checks whether pressure regulator valve connects reliably；Close the 4th control valve
With the 5th control valve, open the second control valve, check material alms bowl whether gas leakage；The 4th control valve is opened, checks desorption of mash gas speed
Whether analyzer connects reliably；Close the second control valve and the 4th control valve；Third control valve is opened, starts vacuum pump, is checked
Whether vacuum gauge and vacuum meter connect reliably；Open the 5th control valve, to material alms bowl vacuumize, check material alms bowl whether gas leakage；It is logical
Power knob Vibration on Start-up motor is crossed, adjusts potentiometer and frequency converter respectively, observes vibrating effect, while checks vibration parameters point
Whether analyzer connects reliably；After Vibration on Start-up motor, whether each pipeline connects reliably in the detecting system again that repeats the above steps
And the air-tightness of each air-breather；
Step 2：Coal sample deaerates
The 5th control valve is closed, removes material alms bowl, coal sample is put into material alms bowl, and install gasket and sealing cover, lifted
Handle will expect that alms bowl is placed on shaking platform, places rubber pad on material alms bowl sealing cover, walking beam is pressed on rubber pad, and is put
Lower compression handle compresses sealing cover stuck；
The 5th control valve is opened, starts vacuum pump and deaerates to coal sample, persistently vacuumize a few hours, treat that the pressure of vacuum meter is shown
When number remains unchanged, the 5th control valve is closed, closes vacuum pump；
Step 3：Coal sample is adsorbed
Gas cylinder uses gas gas cylinder, opens the second control valve and coal sample is inflated, the blowing pressure is controlled by pressure regulator valve
The blowing pressure is made to maintain stationary value；It is to be adsorbed reach balance after, by power knob Vibration on Start-up motor, make coal sample adsorption process
In vibration environment, change vibration velocity by adjusting potentiometer, change vibration frequency by adjusting frequency converter, shaken by adjusting
The relative angle of the first eccentric hammer and the second eccentric hammer on dynamic motor changes vibration amplitude, and is analyzed by vibration parameters
Instrument records vibration parameters, carries out the adsorption experiment under different vibration conditions；
Step 4：Coal sample desorbs
First, the first control valve and the second control valve are closed, opens the 4th control valve, passes through power knob Vibration on Start-up electricity
Machine makes coal sample desorption process be in vibration environment, changes vibration velocity by adjusting potentiometer, is shaken by adjusting frequency converter change
Dynamic frequency, by adjusting the relative angle change vibration amplitude of the first eccentric hammer and the second eccentric hammer on vibrating motor,
And pass through vibration parameters analyzer record vibration parameters；It observes at regular intervals and records a desorption of mash gas speed determinator
Reading, while record thermometric water temperature in sink, and record the atmospheric pressure of experimental situation in desorption process, carry out not
With the desorption experiment under vibration condition；
Coal sample crushes desorption experiment method under different vibration conditions, includes the following steps：
Step 1：Whether each pipeline connects the air-tightness of reliable and each air-breather, first, gas cylinder in inspection system
Airtight test is carried out using nitrogen gas cylinder；The second control valve is closed, opens the first control valve, whether is the registration of observed pressure table
Stablize, it is stable then air tight, pressure regulator valve is adjusted at a slow speed, checks whether pressure regulator valve connects reliably；Close the 4th control valve and the 5th
Control valve, open the second control valve, check material alms bowl whether gas leakage；The 4th control valve is opened, checks desorption of mash gas speed determinator
Whether connect reliable；By power knob Vibration on Start-up motor, potentiometer and frequency converter are adjusted respectively, observe vibrating effect, together
When check vibration parameters analyzer whether connect reliably；It is each in the detecting system again that repeats the above steps after Vibration on Start-up motor
Whether pipeline connects the air-tightness of reliable and each air-breather；
Step 2：The second control valve and the 4th control valve are closed, removes material alms bowl, coal sample and impact block are put into material alms bowl,
And gasket and sealing cover are installed, lifting handle will expect that alms bowl is placed on shaking platform, and rubber is placed on material alms bowl sealing cover
Pad, walking beam is pressed on rubber pad, and put down compression handle sealing cover is compressed it is stuck；
Step 3：The 4th control valve is opened, by power knob Vibration on Start-up motor, changes vibration by adjusting potentiometer
Speed changes vibration frequency, by adjusting the first eccentric hammer and the second eccentric weight on vibrating motor by adjusting frequency converter
The relative angle of hammer changes vibration amplitude, and passes through vibration parameters analyzer record vibration parameters；It observes at regular intervals simultaneously
The reading of desorption of mash gas speed determinator in a vibration processes is recorded, while records thermometric water temperature in sink, and
The atmospheric pressure of experimental situation in experimentation is recorded, the crushing desorption experiment under different vibration conditions is carried out, until desorption of mash gas
When never gas is emerged in speed determinator, stop experiment, close power knob.
Beneficial effects of the present invention：
The experimental system of the present invention can provide different vibration frequencies, vibration velocity and vibration amplitude；The present invention is not only
Can carry out coal under different vibration conditions, to the adsorption and desorption experiment of gas, can also carry out coal sample under different vibration conditions and crush
Desorption experiment；Coal under different vibration conditions can be measured to the Adsorption and desorption characteristics of gas and crush Desorption characteristics.
Description of the drawings
Fig. 1 is the structure diagram of one embodiment of the experimental system of the present invention；
Fig. 2 is the structure diagram of the coal sample pulverizer that oscillation intensity is controllable in Fig. 1；
Fig. 3 is the structure diagram of coal sample pulverizer material alms bowl in Fig. 2；
Fig. 4 is the partial enlarged view of desorption of mash gas speed determinator in Fig. 1；
In figure：1- power knobs, 2- potentiometers, 3- frequency converters, 4- coal sample pulverizers, 5- vibrating sensors, 6- vibration ginsengs
Number analyzer, 7- gas cylinders, 8- pressure regulator valves, 9- pressure gauges, 10- sinks, 11- desorption of mash gas speed determinators, 12- temperature
Meter, 13- vacuum pumps, 14- vacuum gauges, 15- vacuum meters, the first control valves of 16-, the second control valves of 17-, 18- fixing brackets,
The 4th control valves of 19-, the 5th control valves of 20-, 21- third control valves, 22- compression handles, 23- walking beams, 24- rubber pads, 25-
Sealing cover, 26- gaskets, 27- material alms bowls, 28- impact blocks, 29- shaking platforms, 30- shock-absorbing springs, 31- vibrating motors, 32- the
One eccentric hammer, the second eccentric hammers of 33-, 34- engine bases, 35- gas nozzles, 36- handles, 37- power ports, 38- high-pressure air pipes,
39- conducting wires.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1 to 4, it is a kind of to measure under vibration condition that coal is to the experimental system of desorption of mash gas feature, including frequency conversion
Vibrational system, vibration monitor system, coal sample crushing system, degassing system, gas adsorption system and desorption of mash gas system；
The frequency conversion vibration system include vibrating motor 31, shaking platform 29, shock-absorbing spring 30, engine base 34, frequency converter 3,
Power knob 1 and external potentiometer 2, the vibrating motor 31 are fixed on shaking platform 29, and shaking platform 29 is arranged on engine base
34 tops, are connected between shaking platform 29 and engine base 34 by shock-absorbing spring 30；In the upper/lower terminal of the vibrating motor 31
The first eccentric hammer 32 and the second eccentric hammer 33 are respectively arranged with, the first eccentric hammer 32 and the second eccentric hammer 33 provide partially
Mental and physical efforts, vibrating motor 31 are fixed on by fixing bracket 18 on shaking platform 29, and shaking platform 29 is driven to generate dither effect, are become
Frequency device 3 is connected by conducting wire 39 with the power port 37 of vibrating motor 31；The vibrating motor 31, potentiometer 2 and power supply are pressed
Button 1 is connected respectively by conducting wire 39 with frequency converter 3；The vibrating motor 31 changes vibration frequency by frequency converter 3, passes through tune
It saves external potentiometer 2 and changes vibration velocity, it is inclined by the first eccentric hammer 32 and second for adjusting 31 upper/lower terminal of vibrating motor
The phase angle (i.e. relative angle) of heart weight 33 changes oscillation trajectory (i.e. vibration amplitude)；Vibrating motor 31 is become by being connected to
Power knob 1 on frequency device 3 controls it to start and close；
The vibration monitor system includes vibrating sensor 5 and vibration parameters analyzer 6, and the vibrating sensor 5 is fixed
On shaking platform 29, it is connected by cable with vibration parameters analyzer 6, vibration parameters analyzer 6 passes through vibrating sensing
Device 5 measures vibration amplitude, vibration frequency, vibration velocity, vibration displacement and the vibration phase of shaking platform 29；
The coal sample crushing system uses coal sample pulverizer 4, is mounted on including material alms bowl 27 and impact block 28, the material alms bowl 27
On shaking platform 29, impact block 28 is placed in material alms bowl 27；The material alms bowl 27 is configured with sealing cover 25, sealing cover 25 and material alms bowl 27
It is mutually twisted tightly, gas nozzle 35 is provided on sealing cover 25；Be provided with walking beam 23 on shaking platform 29, walking beam 23 with
Material 27 sealing cover 25 of alms bowl is in contact；
The degassing system includes vacuum pump 13, third control valve 21, the 5th control valve 20, vacuum gauge 14 and vacuum meter
15, the vacuum pump 13 is connected with one end of third control valve 21, and the other end of third control valve 21 is all the way through the 5th control
Valve 20 is connected with the gas nozzle 35 on material 27 sealing cover 25 of alms bowl, and another way is connected through vacuum gauge 14 with vacuum meter 15；
The gas adsorption system includes gas cylinder 7, the first control valve 16, pressure regulator valve 8, pressure gauge 9 and second and controls
Valve 17, the first control valve of outlet 16 of the gas cylinder 7 are connected with one end of pressure regulator valve 8, the other end warp of pressure regulator valve 8
Pressure gauge 9 is connected with one end of the second control valve 17, the other end and the gas on material 27 sealing cover 25 of alms bowl of the second control valve 17
Mouth 35 is connected；
The desorption of mash gas system includes 11 and the 4th control valve 19 of desorption of mash gas speed determinator, the desorption of mash gas speed
Degree analyzer 11, which is fixed in sink 10, keeps constant water temperature in desorption of mash gas speed determinator 11, and temperature is provided in sink 10
Degree meter 12；The desorption of mash gas speed determinator 11 is connected by the 4th control valve 19 with the gas nozzle 35 on material 27 sealing cover 25 of alms bowl
It connects.
There are six the settings of shock-absorbing spring 30, and shock-absorbing spring 30 and the shaft of vibrating motor 31 are arranged in parallel.
The groove of installation material alms bowl 27 is provided on the shaking platform 29, material alms bowl 27 is mounted in the groove.
Two handles 36 are provided on the material alms bowl 27.
The impact block 28 is cylinder, is made of hard alloy steel.In the present embodiment, impact block 28 is provided with eight
Block, there are two types of size, one piece of impact block being relatively large in diameter and seven pieces of same diameters and the smaller impact block of diameter, impact block 28 with
Material 27 volume of alms bowl matches.
The junction of the material alms bowl 27 and sealing cover 25 is provided with gasket 26.
The gas nozzle 35 uses cored screw type, and the bottom end of gas nozzle 35 extend into 27 sealing cover of material alms bowl, 25 inside, with expecting alms bowl
27 cavitys are connected；Each component is connected with gas nozzle 35 by high-pressure air pipe 38.
24 anti-sliding stop of rubber pad is provided between the walking beam 23 and material 27 sealing cover 25 of alms bowl.
Compression handle 22 is provided on the shaking platform 29, walking beam 23 is fixed sealing by compression handle 22
Lid 25.
Using coal under the measure vibration condition to the experimental method of the experimental system of desorption of mash gas feature, including difference
Coal crushes desorption experiment method to coal sample under the adsorption and desorption experiment method of gas and different vibration conditions under vibration condition；
Coal includes the following steps the adsorption and desorption experiment method of gas under different vibration conditions：
Step 1：Prepare before experiment
In fresh getting working face coal wall samples of coal pulled, send to laboratory after tightly encapsulating, coal sample is made
Granular or standard square body or cuboid test specimen, and be put into insulating box and dry；It will expect that the impact block 28 in alms bowl 27 takes out, test
Expect not placing impact block 28 in alms bowl 27 in the process；Whether each pipeline connects the airtight of reliable and each air-breather in inspection system
Property, first, gas cylinder 7 carries out airtight test using nitrogen gas cylinder；The second control valve 17 is closed, opens the first control valve
16, whether the registration of observed pressure table 9 is stablized, stable then air tight, adjusts pressure regulator valve 8 at a slow speed, checks whether pressure regulator valve 8 connects
Reliably；Close the 4th control valve 19 and the 5th control valve 20, open the second control valve 17, check material alms bowl 27 whether gas leakage；It opens
It is reliable to check whether desorption of mash gas speed determinator 11 connects for 4th control valve 19；Close the second control valve 17 and the 4th control
Valve 19；Third control valve 21 is opened, starts vacuum pump 13, checks whether vacuum gauge 14 and vacuum meter 15 connect reliably；It opens
5th control valve 20, to material alms bowl 27 vacuumize, check material alms bowl 27 whether gas leakage；By 1 Vibration on Start-up motor 31 of power knob, divide
Not Tiao Jie potentiometer 2 and frequency converter 3, observe vibrating effect, while check whether vibration parameters analyzer 6 connects reliably；Start
After vibrating motor 31, whether each pipeline connects the airtight of reliable and each air-breather in the detecting system again that repeats the above steps
Property；
Step 2：Coal sample deaerates
The 5th control valve 20 is closed, removes material alms bowl 27, coal sample is put into material alms bowl 27, and install gasket 26 and sealing
Lid 25, lifting handle 36 will expect that alms bowl 27 is placed on shaking platform 29, rubber pad 24 be placed on material 27 sealing cover 25 of alms bowl, by work
Dynamic beam 23 is pressed on rubber pad 24, and put down compression handle 22 sealing cover 25 is compressed it is stuck；
The 5th control valve 20 is opened, starts vacuum pump 13 and deaerates to coal sample, persistently vacuumize 24 hours, treat vacuum meter 15
When pressure registration shows 20Pa and it is more than hour to remain unchanged three, the 5th control valve 20 is closed, closes vacuum pump 13；
Step 3：Coal sample is adsorbed
Gas cylinder 7 uses gas gas cylinder, opens the second control valve 17 and coal sample is inflated, controlled and inflated by pressure regulator valve 8
Pressure makes the blowing pressure maintain stationary value；It is to be adsorbed reach balance after (coal sample is persistently adsorbed 60 hours, while 9 registration of pressure gauge
When remaining unchanged within continuous three hours, it is believed that absorption reaches balance)；When considering influence of the dither effect to coal adsorption gas, pass through
1 Vibration on Start-up motor 31 of power knob, makes coal sample adsorption process be in vibration environment, changes vibration speed by adjusting potentiometer 2
Degree changes vibration frequency by adjusting frequency converter 3, eccentric by adjusting the first eccentric hammer 32 and second on vibrating motor 31
The relative angle of weight 33 changes vibration amplitude, and passes through vibration parameters analyzer 6 and record vibration parameters, carries out different vibrator bars
Adsorption experiment under part；When not considering to vibrate the influence to absorption, power knob 1 is closed；
Step 4：Coal sample desorbs
Coal sample desorption of mash gas rule is mainly reflected by analytical unit time desorption of mash gas amount and accumulative desorption of mash gas amount, first
First, the first control valve 16 and the second control valve 17 are closed, the 4th control valve 19 is opened, passes through 1 Vibration on Start-up motor of power knob
31, coal sample desorption process is made to be in vibration environment, changes vibration velocity by adjusting potentiometer 2, is changed by adjusting frequency converter 3
Vibration frequency is shaken by the relative angle change for adjusting the first eccentric hammer 32 and the second eccentric hammer 33 on vibrating motor 31
Dynamic amplitude, and pass through vibration parameters analyzer 6 and record vibration parameters；It observes at regular intervals and records a desorption of mash gas speed
The reading of analyzer 11 is spent, while records the water temperature that thermometer 12 measures in sink 10, for desorption gas is converted into standard shape
Gas volume under condition also needs to the atmospheric pressure of experimental situation in record desorption process, and the desorption carried out under different vibration conditions is real
It tests；When not considering to vibrate the influence to desorption, power knob 1 is closed.
Step 5：Experimental record is arranged, analyzes experimental data, Rule Summary.
Experimental Background：Some gas cannot desorb after coal sample desorbs naturally, can by coal sample crush and
Dither effect desorbs the methane gas of remaining, and experimental system of the invention can carry out remaining quantity in gas bearing capacity measure
Measure, while can also carry out under different vibration conditions crush desorption quantity measure.
Coal sample crushes desorption experiment method under different vibration conditions, includes the following steps：
Step 1：Whether each pipeline connects the air-tightness of reliable and each air-breather, first, gas cylinder in inspection system
7 carry out airtight test using nitrogen gas cylinder；The second control valve 17 is closed, opens the first control valve 16, observed pressure table 9 shows
Whether number is stablized, stable then air tight, adjusts pressure regulator valve 8 at a slow speed, checks whether pressure regulator valve 8 connects reliably；Close the 4th control
19 and the 5th control valve 20 of valve, open the second control valve 17, check material alms bowl 27 whether gas leakage；The 4th control valve 19 is opened, is checked
Whether desorption of mash gas speed determinator 11 connects reliably；By 1 Vibration on Start-up motor 31 of power knob, potentiometer 2 is adjusted respectively
With frequency converter 3, vibrating effect is observed, while check whether vibration parameters analyzer 6 connects reliably；After Vibration on Start-up motor 31,
Whether each pipeline connects the air-tightness of reliable and each air-breather in the detecting system again that repeats the above steps；
Step 2：The second control valve 17 and the 4th control valve 19 are closed, material alms bowl 27 is removed, coal sample and impact block 28 is put into
Expect in alms bowl 27, and install gasket 26 and sealing cover 25, lifting handle 36 will expect that alms bowl 27 is placed on shaking platform 29, expect
Rubber pad 24 is placed on 27 sealing cover 25 of alms bowl, walking beam 23 is pressed on rubber pad 24, and put down compression handle 22 by sealing cover
25 compressions are stuck；Effect of vibration is transmitted feed alms bowl 27 by the present invention by shaking platform 29, causes the impact block 28 in material alms bowl 27
Vibration is generated, crushing effect is generated by the mutual percussion between impact block 28；
Step 3：The 4th control valve 19 is opened, by 1 Vibration on Start-up motor 31 of power knob, is changed by adjusting potentiometer 2
Become vibration velocity, change vibration frequency by adjusting frequency converter 3, by adjusting 32 He of the first eccentric hammer on vibrating motor 31
The relative angle of second eccentric hammer 33 changes vibration amplitude, and passes through vibration parameters analyzer 6 and record vibration parameters；Every one
It fixes time and observation and records the reading of desorption of mash gas speed determinator 11 in a vibration processes, while record temperature in sink 10
The water temperature that meter 12 measures, and the atmospheric pressure of experimental situation in experimentation is recorded, carry out the crushing desorption under different vibration conditions
Experiment when emerging until never having gas in desorption of mash gas speed determinator 11, stops experiment, closes power knob 1；
Step 4：Experimental record is arranged, analyzes experimental data, Rule Summary.
The present invention is not limited to the above embodiments, can also be improved, and solution is adsorbed under vibration to measure coal sample
By pasting foil gauge in coal sample, the deformation of coal sample in vibration processes is measured with dynamic signal testing instrument for deformation rule during suction.
Claims (6)
1. coal is to the experimental system of desorption of mash gas feature under a kind of measure vibration condition, it is characterised in that including variant-frequency vibration system
System, vibration monitor system, coal sample crushing system, degassing system, gas adsorption system and desorption of mash gas system；
The frequency conversion vibration system includes vibrating motor, shaking platform, shock-absorbing spring, engine base, frequency converter, power knob and external
Potentiometer, the vibrating motor are fixed on shaking platform, and shaking platform is arranged on above engine base, between shaking platform and engine base
It is connected by shock-absorbing spring；The first eccentric hammer and the second bias are respectively arranged in the upper/lower terminal of the vibrating motor
Weight, the vibrating motor, potentiometer and power knob are connected respectively with frequency converter, and the vibrating motor passes through the frequency conversion
Device changes vibration frequency, changes vibration velocity by adjusting the potentiometer, by adjusting first eccentric hammer and described
The phase angle of second eccentric hammer changes vibration amplitude；
The vibration monitor system includes vibrating sensor and vibration parameters analyzer, and it is flat that the vibrating sensor is fixed on vibration
On platform, it is connected with vibration parameters analyzer；
The coal sample crushing system includes material alms bowl and impact block, and the material alms bowl is mounted on shaking platform, and impact block is placed on material
In alms bowl；The material alms bowl is configured with sealing cover, and gas nozzle is provided on sealing cover；Walking beam is provided on shaking platform, activity
Beam is in contact with material alms bowl sealing cover, gasket is provided in the junction of the material alms bowl and sealing cover, the gas nozzle is using hollow
Screw type, the bottom end of gas nozzle extend on the inside of material alms bowl sealing cover, are connected with material alms bowl cavity；
The degassing system includes vacuum pump, third control valve, the 5th control valve, vacuum gauge and vacuum meter, the vacuum pump
It is connected with one end of third control valve, the other end of third control valve is all the way through the 5th control valve and the gas on material alms bowl sealing cover
Mouth is connected, and another way is connected through vacuum gauge with vacuum meter；
The gas adsorption system includes gas cylinder, the first control valve, pressure regulator valve, pressure gauge and the second control valve, the height
The first control valve of outlet of air bottle is connected with one end of pressure regulator valve, and the other end of pressure regulator valve is controlled through pressure gauge and second
One end of valve is connected, and the other end of the second control valve is connected with the gas nozzle on material alms bowl sealing cover；
The desorption of mash gas system includes desorption of mash gas speed determinator and the 4th control valve, the desorption of mash gas speed determinator
It is fixed in sink, thermometer is provided in sink；The desorption of mash gas speed determinator passes through the 4th control valve and material alms bowl
Gas nozzle on sealing cover is connected；
The groove of installation material alms bowl is provided on the shaking platform, material alms bowl is mounted in the groove；It is set on the material alms bowl
There are two handles.
2. coal is to the experimental system of desorption of mash gas feature under measure vibration condition according to claim 1, it is characterised in that
There are six the shock-absorbing spring settings, and the shaft of shock-absorbing spring and vibrating motor is arranged in parallel.
3. coal is to the experimental system of desorption of mash gas feature under measure vibration condition according to claim 1, it is characterised in that
The impact block is cylinder, is made of hard alloy steel.
4. coal is to the experimental system of desorption of mash gas feature under measure vibration condition according to claim 1, it is characterised in that
Rubber pad is provided between the walking beam and material alms bowl sealing cover.
5. coal is to the experimental system of desorption of mash gas feature under measure vibration condition according to claim 1, it is characterised in that
Compression handle is provided on the shaking platform, walking beam is fixed sealing cover by compression handle.
6. using coal under measure vibration condition described in claim 1 to the experimental method of the experimental system of desorption of mash gas feature,
It is characterised in that it includes coal is to coal sample powder under the adsorption and desorption experiment method of gas and different vibration conditions under different vibration conditions
Size degradation inhales experimental method；
Coal includes the following steps the adsorption and desorption experiment method of gas under different vibration conditions：
Step 1：Prepare before experiment
In fresh getting working face coal wall samples of coal pulled, sent after tightly encapsulating to laboratory, graininess is made in coal sample
Or standard square body or cuboid test specimen, and be put into insulating box and dry；The impact block expected in alms bowl is taken out, is expected in experimentation
Impact block is not placed in alms bowl；Whether each pipeline connects the air-tightness of reliable and each air-breather, first, high pressure gas in inspection system
Bottle carries out airtight test using nitrogen gas cylinder；The second control valve is closed, opens the first control valve, the registration of observed pressure table is
No stabilization, it is stable then air tight, pressure regulator valve is adjusted at a slow speed, checks whether pressure regulator valve connects reliably；Close the 4th control valve and
Five control valves, open the second control valve, check material alms bowl whether gas leakage；The 4th control valve is opened, checks desorption of mash gas velocity determination
Whether instrument connects reliably；Close the second control valve and the 4th control valve；Third control valve is opened, starts vacuum pump, checks vacuum
It regulates with whether vacuum meter connects reliably；Open the 5th control valve, to material alms bowl vacuumize, check material alms bowl whether gas leakage；Pass through electricity
Source button Vibration on Start-up motor adjusts potentiometer and frequency converter respectively, observes vibrating effect, while check vibration parameters analyzer
Whether connect reliable；After Vibration on Start-up motor, whether each pipeline connects reliable and each in the detecting system again that repeats the above steps
The air-tightness of air-breather；
Step 2：Coal sample deaerates
The 5th control valve is closed, removes material alms bowl, coal sample is put into material alms bowl, and install gasket and sealing cover, lifts handle
Material alms bowl is placed on shaking platform, rubber pad is placed on material alms bowl sealing cover, walking beam is pressed on rubber pad, and put down pressure
Tight handle compresses sealing cover stuck；
The 5th control valve is opened, starts vacuum pump and deaerates to coal sample, persistently vacuumize a few hours, treats that the pressure registration of vacuum meter is protected
When holding constant, the 5th control valve is closed, closes vacuum pump；
Step 3：Coal sample is adsorbed
Gas cylinder uses gas gas cylinder, opens the second control valve and coal sample is inflated, and the blowing pressure is controlled to make to fill by pressure regulator valve
Atmospheric pressure maintains stationary value；It is to be adsorbed reach balance after, by power knob Vibration on Start-up motor, be in coal sample adsorption process
Vibration environment, changes vibration velocity by adjusting potentiometer, changes vibration frequency by adjusting frequency converter, by adjusting vibration electricity
The relative angle of the first eccentric hammer and the second eccentric hammer on machine changes vibration amplitude, and passes through vibration parameters analyzer and remember
Vibration parameters are recorded, carry out the adsorption experiment under different vibration conditions；
Step 4：Coal sample desorbs
First, the first control valve and the second control valve are closed, opens the 4th control valve, by power knob Vibration on Start-up motor,
Coal sample desorption process is made to be in vibration environment, changes vibration velocity by adjusting potentiometer, changes vibration by adjusting frequency converter
Frequency, by adjusting the relative angle change vibration amplitude of the first eccentric hammer and the second eccentric hammer on vibrating motor, and
Vibration parameters are recorded by vibration parameters analyzer；It observes at regular intervals and records desorption of mash gas speed determinator
Reading, while thermometric water temperature in sink is recorded, and record the atmospheric pressure of experimental situation in desorption process, it carries out different
Desorption experiment under vibration condition；
Coal sample crushes desorption experiment method under different vibration conditions, includes the following steps：
Step 1：Whether each pipeline connects the air-tightness of reliable and each air-breather in inspection system, and first, gas cylinder uses
Nitrogen gas cylinder carries out airtight test；The second control valve is closed, opens the first control valve, whether the registration of observed pressure table is steady
It is fixed, it is stable then air tight, pressure regulator valve is adjusted at a slow speed, checks whether pressure regulator valve connects reliably；Close the 4th control valve and the 5th control
Valve processed, open the second control valve, check material alms bowl whether gas leakage；The 4th control valve is opened, checks that desorption of mash gas speed determinator is
No connection is reliable；By power knob Vibration on Start-up motor, potentiometer and frequency converter are adjusted respectively, observe vibrating effect, simultaneously
Check whether vibration parameters analyzer connects reliably；After Vibration on Start-up motor, respectively managed in the detecting system again that repeats the above steps
Whether line connects the air-tightness of reliable and each air-breather；
Step 2：The second control valve and the 4th control valve are closed, removes material alms bowl, coal sample and impact block are put into material alms bowl, and is pacified
Gasket and sealing cover are installed, lifting handle will expect that alms bowl is placed on shaking platform, and rubber pad is placed on material alms bowl sealing cover, will
Walking beam is pressed on rubber pad, and put down compression handle sealing cover is compressed it is stuck；
Step 3：The 4th control valve is opened, by power knob Vibration on Start-up motor, changes vibration speed by adjusting potentiometer
Degree changes vibration frequency, by adjusting the first eccentric hammer and the second eccentric hammer on vibrating motor by adjusting frequency converter
Relative angle change vibration amplitude, and pass through vibration parameters analyzer record vibration parameters；It observes and remembers at regular intervals
The reading of desorption of mash gas speed determinator in a vibration processes is recorded, while records thermometric water temperature in sink, and remember
The atmospheric pressure of experimental situation in experimentation is recorded, carries out the crushing desorption experiment under different vibration conditions, until desorption of mash gas speed
When never gas is emerged in degree analyzer, stop experiment, close power knob.
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| CN201510350745.5A CN104990865B (en) | 2015-06-24 | 2015-06-24 | Coal is to the experimental system and experimental method of desorption of mash gas feature under measure vibration condition |
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| CN201510350745.5A CN104990865B (en) | 2015-06-24 | 2015-06-24 | Coal is to the experimental system and experimental method of desorption of mash gas feature under measure vibration condition |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202101920U (en) * | 2011-06-16 | 2012-01-04 | 西安科技大学 | Testing device for researching effect of mechanical vibration to adsorption and desorption properties of coal samples |
| CN202382794U (en) * | 2011-12-07 | 2012-08-15 | 青岛科海矿业技术服务有限公司 | Gas desorption speed and desorption amount measurement instrument in process of crushing coal sample |
| CN203011791U (en) * | 2012-12-20 | 2013-06-19 | 河南理工大学 | Gas absorption/desorption testing device |
| CN103454386A (en) * | 2013-09-18 | 2013-12-18 | 山东科技大学 | Coal and gas outburst simulation experiment device capable of considering dynamic influence and testing method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202101920U (en) * | 2011-06-16 | 2012-01-04 | 西安科技大学 | Testing device for researching effect of mechanical vibration to adsorption and desorption properties of coal samples |
| CN202382794U (en) * | 2011-12-07 | 2012-08-15 | 青岛科海矿业技术服务有限公司 | Gas desorption speed and desorption amount measurement instrument in process of crushing coal sample |
| CN203011791U (en) * | 2012-12-20 | 2013-06-19 | 河南理工大学 | Gas absorption/desorption testing device |
| CN103454386A (en) * | 2013-09-18 | 2013-12-18 | 山东科技大学 | Coal and gas outburst simulation experiment device capable of considering dynamic influence and testing method thereof |
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