CN104990865A - Experiment system and method for testing desorption characteristic of coal to gas under vibration condition - Google Patents
Experiment system and method for testing desorption characteristic of coal to gas under vibration condition Download PDFInfo
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- CN104990865A CN104990865A CN201510350745.5A CN201510350745A CN104990865A CN 104990865 A CN104990865 A CN 104990865A CN 201510350745 A CN201510350745 A CN 201510350745A CN 104990865 A CN104990865 A CN 104990865A
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Abstract
The invention belongs to the technical field of coal mine safety, and relates to an experiment system and method for testing the desorption characteristic of coal to gas under the vibration condition. The experiment system comprises a frequency conversion vibrating system, a vibration monitoring system, a coal sample crushing system, a degassing system, a gas adsorption system and a gas desorption system. The frequency conversion vibrating system comprises a vibration motor, a vibration platform, a damper spring, a machine base, a frequency converter, a power button and an external potentiometer. The vibration motor is fixed to the vibration platform. The vibration platform is arranged above the machine base. The vibration platform and the machine base are connected through the damper spring. A first eccentric heavy hammer and a second eccentric heavy hammer are arranged at the upper end and the lower end of the vibration motor respectively, and the vibration motor, the potentiometer and the power button are connected with the frequency converter. The experiment method comprises the adsorption and desorption experiment method of coal to gas under different vibration conditions and the coal sample crushing and desorbing experiment method. By means of the experiment system and method, the adsorption and desorption characteristic and the crushing and desorbing characteristic of coal to gas under different vibration conditions can be tested.
Description
Technical field
The invention belongs to technical field of mine safety, particularly relate to a kind of coal that to measure under different vibration condition to gas adsorption Desorption characteristics and experimental system and the experimental technique of pulverizing Desorption characteristics.
Background technology
The adsorption and desorption experiment system of coal in the past on gas does not consider the impact of oscillatory load on coal sample adsorption-desorption.There is coalcutter coal cutting disturbance in the mining work activities of colliery, underground blasting vibration, ore deposit pressure manifest, ore deposit shake, the multiple vibration source such as rock burst, effect of vibration makes the adhesion of gas on coal body skeleton surface reduce, the heat energy simultaneously vibrating generation makes coal temperature raise, from Lang Gemiaoer adsorption curve, coal reduces along with temperature raises gradually to the suction-operated of gas; On the other hand, the inner initial fissure of coal body affected by vibration is grown again, adds coal body gas penetration potential; Therefore, effect of vibration has larger facilitation to coal gas desorb diffusion.Existing experimental system can not reflect the impact of mining active process yo-yo effect on coal adsorption-desorption gas.
At present, the adsorption law when experimental system studying coal sample crushing process desorption quantity does not consider different vibration condition.Because different vibrational perturbations is movable, vibration amplitude, vibration frequency, vibration velocity etc. are all not identical, and vibrate the thermal effect of generation and have different to coal body degree of crushing etc., also there is some difference for desorption of mash gas rule.Coal sample crushing process, different oscillation intensity also has certain influence to coal sample adsorption law, and current experimental system is only limitted to study final desorb total amount, can not complete the experiment to adsorption law in coal sample crushing process under different vibration condition.
Summary of the invention
For prior art Problems existing, the invention provides a kind of measure vibration condition under coal to the experimental system of desorption of mash gas feature and experimental technique, the present invention can to measure under different vibration condition coal to the Adsorption and desorption characteristics of gas with pulverize Desorption characteristics.
To achieve these goals, the present invention adopts following technical scheme: a kind of measure vibration condition under coal to the experimental system of desorption of mash gas feature, comprise frequency conversion vibration system, vibration monitor system, coal sample crushing system, degas system, gas adsorption system and desorption of mash gas system;
Described frequency conversion vibration system involving vibrations motor, shaking platform, shock-absorbing spring, support, frequency converter, power knob and external potentiometer, described vibrating motor is fixed on shaking platform, shaking platform is arranged on above support, is connected between shaking platform with support by shock-absorbing spring; Be respectively arranged with the first eccentric hammer and the second eccentric hammer at the upper/lower terminal of described vibrating motor, described vibrating motor, potentiometer and power knob are connected with frequency converter respectively;
Described vibration monitor system involving vibrations sensor and vibration parameters analyser, described vibration transducer is fixed on shaking platform, and it is connected with vibration parameters analyser;
Described coal sample crushing system comprises material alms bowl and impact block, and described material alms bowl is arranged on shaking platform, and impact block is placed in material alms bowl; Described material alms bowl is configured with gland bonnet, and gland bonnet is provided with valve; Shaking platform is provided with portable beam, and portable beam contacts with material alms bowl gland bonnet;
Described degas system comprises vacuum pump, the 3rd operation valve, the 5th operation valve, vacuum gauge and vacuum meter, described vacuum pump is connected with one end of the 3rd operation valve, the other end one tunnel the 5th operation valve of the 3rd operation valve is connected with the valve on material alms bowl gland bonnet, and another road is connected with vacuum meter through vacuum gauge;
Described gas adsorption system comprises gas cylinder, the first operation valve, pressure regulator valve, tensimeter and the second operation valve, the outlet of described gas cylinder is connected with one end of pressure regulator valve through the first operation valve, the other end of pressure regulator valve is connected through tensimeter one end with the second operation valve, and the other end of the second operation valve is connected with the valve on material alms bowl gland bonnet;
Described desorption of mash gas system comprises desorption of mash gas speed determinator and the 4th operation valve, and described desorption of mash gas speed determinator is fixed in tank, in tank, be provided with thermometer; Described desorption of mash gas speed determinator is connected with the valve on material alms bowl gland bonnet by the 4th operation valve.
Described shock-absorbing spring is provided with six, and the shaft parallel of shock-absorbing spring and vibrating motor is arranged.
Described shaking platform is provided with the groove installing material alms bowl, and material alms bowl is arranged in described groove.
Described material alms bowl is provided with two handles.
Described impact block is right cylinder, adopts hard alloy steel to make.
The junction of described material alms bowl and gland bonnet is provided with sealing gasket.
Described valve adopts cored screw type, and the bottom of valve extend into inside material alms bowl gland bonnet, is connected with material alms bowl cavity.
Rubber blanket is provided with between described portable beam and material alms bowl gland bonnet.
Described shaking platform is provided with compression handle, and portable beam is fixed gland bonnet by compressing handle.
Under mensuration vibration condition described in employing, coal is to the experimental technique of the experimental system of desorption of mash gas feature, and under comprising different vibration condition, coal pulverizes desorption experiment method to coal sample under the adsorption and desorption experiment method of gas and different vibration condition;
Under different vibration condition, coal is to the adsorption and desorption experiment method of gas, comprises the steps:
Step one: prepare before experiment
In fresh getting working face rib samples of coal pulled, after tightly encapsulating, deliver to laboratory, coal sample is made graininess or standard square body or rectangular parallelepiped test specimen, and put into constant temperature oven and dry; Impact block in material alms bowl is taken out, expects in experimentation not place impact block in alms bowl; In check system, whether each pipeline connects the impermeability of reliable and each air-breather, and first, gas cylinder adopts nitrogen gas cylinder to carry out airtight test; Close the second operation valve, open the first operation valve, whether the registration of observed pressure table is stablized, stable then air tight, regulates pressure regulator valve at a slow speed, checks whether pressure regulator valve connects reliably; Close the 4th operation valve and the 5th operation valve, open the second operation valve, check whether material alms bowl leaks gas; Open the 4th operation valve, check whether desorption of mash gas speed determinator connects reliably; Close the second operation valve and the 4th operation valve; Open the 3rd operation valve, start vacuum pump, check whether vacuum gauge is connected reliably with vacuum meter; Open the 5th operation valve, material alms bowl is vacuumized, check whether material alms bowl leaks gas; By power knob Vibration on Start-up motor, regulator potentiometer and frequency converter respectively, observes vibrating effect, checks whether vibration parameters analyser connects reliably simultaneously; After Vibration on Start-up motor, repeat above-mentioned steps again in detection system each pipeline whether connect the impermeability of reliable and each air-breather;
Step 2: coal sample is degassed
Close the 5th operation valve, take off material alms bowl, coal sample is put into material alms bowl, and install sealing gasket and gland bonnet, mention handle and material alms bowl is placed on shaking platform, material alms bowl gland bonnet places rubber blanket, portable beam is pressed on rubber blanket, and put down compress handle gland bonnet is compressed stuck;
Open the 5th operation valve, start vacuum pump degassed to coal sample, continue to vacuumize a few hours, when the pressure registration of vacuum meter remains unchanged, close the 5th operation valve, close vacuum pump;
Step 3: coal sample is adsorbed
Gas cylinder adopts gas gas cylinder, opens the second operation valve and inflates coal sample, controls charge pressure make charge pressure maintain stationary value by pressure regulator valve; Upon adsorption reach balance after, by power knob Vibration on Start-up motor, coal sample adsorption process is made to be in vibration environment, vibration velocity is changed by regulator potentiometer, vibration frequency is changed by regulating frequency converter, by regulating the relative angle of the first eccentric hammer on vibrating motor and the second eccentric hammer to change vibration amplitude, and by vibration parameters analyser record vibration parameters, carry out the adsorption experiment under different vibration condition;
Step 4: coal sample desorb
First, close the first operation valve and the second operation valve, open the 4th operation valve, by power knob Vibration on Start-up motor, making coal sample desorption process be in vibration environment, change vibration velocity by regulator potentiometer, changing vibration frequency by regulating frequency converter, by regulating the relative angle of the first eccentric hammer on vibrating motor and the second eccentric hammer to change vibration amplitude, and by vibration parameters analyser record vibration parameters; Observe at regular intervals and record the reading of a desorption of mash gas speed determinator, recording thermometric water temperature in tank simultaneously, and record the atmospheric pressure of experimental situation in desorption process, carry out the desorption experiment under different vibration condition;
Under different vibration condition, coal sample pulverizes desorption experiment method, comprises the steps:
Step one: in check system, whether each pipeline connects the impermeability of reliable and each air-breather, first, gas cylinder adopts nitrogen gas cylinder to carry out airtight test; Close the second operation valve, open the first operation valve, whether the registration of observed pressure table is stablized, stable then air tight, regulates pressure regulator valve at a slow speed, checks whether pressure regulator valve connects reliably; Close the 4th operation valve and the 5th operation valve, open the second operation valve, check whether material alms bowl leaks gas; Open the 4th operation valve, check whether desorption of mash gas speed determinator connects reliably; By power knob Vibration on Start-up motor, regulator potentiometer and frequency converter respectively, observes vibrating effect, checks whether vibration parameters analyser connects reliably simultaneously; After Vibration on Start-up motor, repeat above-mentioned steps again in detection system each pipeline whether connect the impermeability of reliable and each air-breather;
Step 2: close the second operation valve and the 4th operation valve, take off material alms bowl, coal sample and impact block are put into material alms bowl, and install sealing gasket and gland bonnet, mentioning handle is placed on shaking platform by material alms bowl, material alms bowl gland bonnet places rubber blanket, portable beam is pressed on rubber blanket, and put down and compress handle and gland bonnet is compressed stuck;
Step 3: open the 4th operation valve, by power knob Vibration on Start-up motor, vibration velocity is changed by regulator potentiometer, vibration frequency is changed by regulating frequency converter, by regulating the relative angle of the first eccentric hammer on vibrating motor and the second eccentric hammer to change vibration amplitude, and by vibration parameters analyser record vibration parameters; Observe at regular intervals and record the reading of desorption of mash gas speed determinator in a vibration processes, record thermometric water temperature in tank simultaneously, and record the atmospheric pressure of experimental situation in experimentation, carry out the pulverizing desorption experiment under different vibration condition, until when in desorption of mash gas speed determinator, never gas is emerged, stop experiment, powered-down button.
Beneficial effect of the present invention:
Experimental system of the present invention can provide different vibration frequency, vibration velocity and vibration amplitudes; Under the present invention not only can carry out different vibration condition, coal is to the adsorption and desorption experiment of gas, and under can also carrying out different vibration condition, coal sample pulverizes desorption experiment; Under can measuring different vibration condition, coal is to the Adsorption and desorption characteristics of gas and pulverizing Desorption characteristics.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of experimental system of the present invention;
Fig. 2 is the structural representation of the coal sample comminutor that in Fig. 1, oscillation intensity is controlled;
Fig. 3 is the structural representation of coal sample comminutor material alms bowl in Fig. 2;
Fig. 4 is the partial enlarged drawing of desorption of mash gas speed determinator in Fig. 1;
In figure: 1-power knob, 2-potentiometer, 3-frequency converter, 4-coal sample comminutor, 5-vibration transducer, 6-vibration parameters analyser, 7-gas cylinder, 8-pressure regulator valve, 9-tensimeter, 10-tank, 11-desorption of mash gas speed determinator, 12-thermometer, 13-vacuum pump, 14-vacuum gauge, 15-vacuum meter, 16-first operation valve, 17-second operation valve, 18-fixed support, 19-the 4th operation valve, 20-the 5th operation valve, 21-the 3rd operation valve, 22-compresses handle, 23-portable beam, 24-rubber blanket, 25-gland bonnet, 26-sealing gasket, 27-expects alms bowl, 28-impact block, 29-shaking platform, 30-shock-absorbing spring, 31-vibrating motor, 32-first eccentric hammer, 33-second eccentric hammer, 34-support, 35-valve, 36-handle, 37-power port, 38-high-pressure air pipe, 39-wire.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1 to 4, a kind of measure vibration condition under coal to the experimental system of desorption of mash gas feature, comprise frequency conversion vibration system, vibration monitor system, coal sample crushing system, degas system, gas adsorption system and desorption of mash gas system;
Described frequency conversion vibration system involving vibrations motor 31, shaking platform 29, shock-absorbing spring 30, support 34, frequency converter 3, power knob 1 and external potentiometer 2, described vibrating motor 31 is fixed on shaking platform 29, shaking platform 29 is arranged on above support 34, is connected between shaking platform 29 with support 34 by shock-absorbing spring 30; The first eccentric hammer 32 and the second eccentric hammer 33 is respectively arranged with at the upper/lower terminal of described vibrating motor 31, first eccentric hammer 32 and the second eccentric hammer 33 provide eccentric force, vibrating motor 31 is fixed on shaking platform 29 by fixed support 18, drive shaking platform 29 to produce yo-yo effect, frequency converter 3 is connected with the power port 37 of vibrating motor 31 by wire 39; Described vibrating motor 31, potentiometer 2 and power knob 1 are connected with frequency converter 3 respectively by wire 39; Described vibrating motor 31 changes vibration frequency by frequency converter 3, vibration velocity is changed by regulating external potentiometer 2, by the first eccentric hammer 32 of adjustment vibrating motor 31 upper/lower terminal and the phasing degree (i.e. relative angle) of the second eccentric hammer 33, change oscillation trajectory (i.e. vibration amplitude); Vibrating motor 31 controls it by the power knob 1 be connected on frequency converter 3 and starts and close;
Described vibration monitor system involving vibrations sensor 5 and vibration parameters analyser 6, described vibration transducer 5 is fixed on shaking platform 29, it is connected with vibration parameters analyser 6 by cable, and vibration parameters analyser 6 measures the vibration amplitude of shaking platform 29, vibration frequency, vibration velocity, vibration displacement and vibration phase by vibration transducer 5;
Described coal sample crushing system adopts coal sample comminutor 4, and comprise material alms bowl 27 and impact block 28, described material alms bowl 27 is arranged on shaking platform 29, and impact block 28 is placed in material alms bowl 27; Described material alms bowl 27 is configured with gland bonnet 25, and gland bonnet 25 is engaged tight with material alms bowl 27 mutually, and gland bonnet 25 is provided with valve 35; Shaking platform 29 is provided with portable beam 23, and portable beam 23 contacts with material alms bowl 27 gland bonnet 25;
Described degas system comprises vacuum pump 13, the 3rd operation valve 21, the 5th operation valve 20, vacuum gauge 14 and vacuum meter 15, described vacuum pump 13 is connected with one end of the 3rd operation valve 21, the other end one tunnel the 5th operation valve 20 of the 3rd operation valve 21 is connected with the valve 35 on material alms bowl 27 gland bonnet 25, and another road is connected with vacuum meter 15 through vacuum gauge 14;
Described gas adsorption system comprises gas cylinder 7, first operation valve 16, pressure regulator valve 8, tensimeter 9 and the second operation valve 17, the outlet of described gas cylinder 7 is connected with one end of pressure regulator valve 8 through the first operation valve 16, the other end of pressure regulator valve 8 is connected through tensimeter 9 one end with the second operation valve 17, and the other end of the second operation valve 17 is connected with the valve 35 on material alms bowl 27 gland bonnet 25;
Described desorption of mash gas system comprises desorption of mash gas speed determinator 11 and the 4th operation valve 19, and described desorption of mash gas speed determinator 11 is fixed in tank 10 and keeps water temperature in desorption of mash gas speed determinator 11 constant, is provided with thermometer 12 in tank 10; Described desorption of mash gas speed determinator 11 is connected with the valve 35 on material alms bowl 27 gland bonnet 25 by the 4th operation valve 19.
Described shock-absorbing spring 30 is provided with six, and shock-absorbing spring 30 is arranged with the shaft parallel of vibrating motor 31.
Described shaking platform 29 is provided with the groove installing material alms bowl 27, and material alms bowl 27 is arranged in described groove.
Described material alms bowl 27 is provided with two handles 36.
Described impact block 28 is right cylinder, adopts hard alloy steel to make.In the present embodiment, impact block 28 is provided with eight pieces, has two kinds of sizes, the impact block that one piece of diameter is larger and seven pieces of same diameter and the less impact block of diameter, and impact block 28 matches with material alms bowl 27 volume.
At described material alms bowl 27, the junction of gland bonnet 25 is provided with sealing gasket 26.
Described valve 35 adopts cored screw type, and the bottom of valve 35 extend into inside material alms bowl 27 gland bonnet 25, is connected with material alms bowl 27 cavity; Each parts are connected by high-pressure air pipe 38 with valve 35.
The anti-sliding stop of rubber blanket 24 is provided with between described portable beam 23 and material alms bowl 27 gland bonnet 25.
Described shaking platform 29 is provided with and compresses handle 22, portable beam 23 is fixed gland bonnet 25 by compressing handle 22.
Under mensuration vibration condition described in employing, coal is to the experimental technique of the experimental system of desorption of mash gas feature, and under comprising different vibration condition, coal pulverizes desorption experiment method to coal sample under the adsorption and desorption experiment method of gas and different vibration condition;
Under different vibration condition, coal is to the adsorption and desorption experiment method of gas, comprises the steps:
Step one: prepare before experiment
In fresh getting working face rib samples of coal pulled, after tightly encapsulating, deliver to laboratory, coal sample is made graininess or standard square body or rectangular parallelepiped test specimen, and put into constant temperature oven and dry; Impact block 28 in material alms bowl 27 is taken out, expects in experimentation not place impact block 28 in alms bowl 27; In check system, whether each pipeline connects the impermeability of reliable and each air-breather, and first, gas cylinder 7 adopts nitrogen gas cylinder to carry out airtight test; Close the second operation valve 17, open the first operation valve 16, whether the registration of observed pressure table 9 is stablized, stable then air tight, regulates pressure regulator valve 8 at a slow speed, checks whether pressure regulator valve 8 connects reliably; Close the 4th operation valve 19 and the 5th operation valve 20, open the second operation valve 17, check whether material alms bowl 27 leaks gas; Open the 4th operation valve 19, check whether desorption of mash gas speed determinator 11 connects reliable; Close the second operation valve 17 and the 4th operation valve 19; Open the 3rd operation valve 21, start vacuum pump 13, check whether vacuum gauge 14 is connected reliably with vacuum meter 15; Open the 5th operation valve 20, material alms bowl 27 is vacuumized, check whether material alms bowl 27 leaks gas; By power knob 1 Vibration on Start-up motor 31, regulator potentiometer 2 and frequency converter 3 respectively, observes vibrating effect, checks whether vibration parameters analyser 6 connects reliable simultaneously; After Vibration on Start-up motor 31, repeat above-mentioned steps again in detection system each pipeline whether connect the impermeability of reliable and each air-breather;
Step 2: coal sample is degassed
Close the 5th operation valve 20, take off material alms bowl 27, coal sample is put into material alms bowl 27, and install sealing gasket 26 and gland bonnet 25, mentioning handle 36 is placed on shaking platform 29 by material alms bowl 27, material alms bowl 27 gland bonnet 25 places rubber blanket 24, portable beam 23 is pressed on rubber blanket 24, and put down and compress handle 22 gland bonnet 25 is compressed stuck;
Open the 5th operation valve 20, start vacuum pump 13 pairs of coal samples degassed, continue to vacuumize 24 hours, until vacuum meter 15 pressure registration display 20Pa and remain unchanged more than three hours time, close the 5th operation valve 20, close vacuum pump 13;
Step 3: coal sample is adsorbed
Gas cylinder 7 adopts gas gas cylinder, opens the 17 pairs of coal sample inflations of the second operation valve, controls charge pressure make charge pressure maintain stationary value by pressure regulator valve 8; Upon adsorption reaching balances rear (coal sample continues absorption 60 hours, when tensimeter 9 registration remains unchanged for continuous three hours simultaneously, thinks that absorption reaches balance); When considering yo-yo effect to the affecting of coal adsorption gas, by power knob 1 Vibration on Start-up motor 31, coal sample adsorption process is made to be in vibration environment, vibration velocity is changed by regulator potentiometer 2, vibration frequency is changed by regulating frequency converter 3, by regulating the relative angle of the first eccentric hammer 32 on vibrating motor 31 and the second eccentric hammer 33 to change vibration amplitude, and recording vibration parameters by vibration parameters analyser 6, carrying out the adsorption experiment under different vibration condition; Do not consider vibrate on absorption affect time, powered-down button 1;
Step 4: coal sample desorb
Coal sample desorption of mash gas rule is mainly through analytical unit time desorption of mash gas amount and the reflection of accumulative desorption of mash gas amount, first, close the first operation valve 16 and the second operation valve 17, open the 4th operation valve 19, by power knob 1 Vibration on Start-up motor 31, coal sample desorption process is made to be in vibration environment, vibration velocity is changed by regulator potentiometer 2, vibration frequency is changed by regulating frequency converter 3, vibration amplitude is changed by regulating the relative angle of the first eccentric hammer 32 on vibrating motor 31 and the second eccentric hammer 33, and record vibration parameters by vibration parameters analyser 6, observe at regular intervals and record the reading of a desorption of mash gas speed determinator 11, record the water temperature that in tank 10, thermometer 12 records simultaneously, for the gas volume be converted into by desorption gas under the status of criterion also needs the atmospheric pressure recording experimental situation in desorption process, carry out the desorption experiment under different vibration condition, when not considering to vibrate the affecting of desorb, powered-down button 1.
Step 5: arrange experimental record, analysis design mothod data, Rule Summary.
Experimental Background: after the desorb of coal sample nature, some gas can not desorb, can to be pulverized by coal sample and remaining methane gas desorbs by yo-yo effect, experimental system of the present invention can carry out the mensuration of remaining quantity in gas bearing capacity mensuration, pulverizes desorption quantity simultaneously and measure under can also carrying out different vibration condition.
Under different vibration condition, coal sample pulverizes desorption experiment method, comprises the steps:
Step one: in check system, whether each pipeline connects the impermeability of reliable and each air-breather, first, gas cylinder 7 adopts nitrogen gas cylinder to carry out airtight test; Close the second operation valve 17, open the first operation valve 16, whether the registration of observed pressure table 9 is stablized, stable then air tight, regulates pressure regulator valve 8 at a slow speed, checks whether pressure regulator valve 8 connects reliably; Close the 4th operation valve 19 and the 5th operation valve 20, open the second operation valve 17, check whether material alms bowl 27 leaks gas; Open the 4th operation valve 19, check whether desorption of mash gas speed determinator 11 connects reliable; By power knob 1 Vibration on Start-up motor 31, regulator potentiometer 2 and frequency converter 3 respectively, observes vibrating effect, checks whether vibration parameters analyser 6 connects reliable simultaneously; After Vibration on Start-up motor 31, repeat above-mentioned steps again in detection system each pipeline whether connect the impermeability of reliable and each air-breather;
Step 2: close the second operation valve 17 and the 4th operation valve 19, take off material alms bowl 27, coal sample and impact block 28 are put into material alms bowl 27, and install sealing gasket 26 and gland bonnet 25, mentioning handle 36 is placed on shaking platform 29 by material alms bowl 27, material alms bowl 27 gland bonnet 25 places rubber blanket 24, portable beam 23 is pressed on rubber blanket 24, and put down and compress handle 22 gland bonnet 25 is compressed stuck; Effect of vibration is transmitted feed alms bowl 27 by shaking platform 29 by the present invention, causes the impact block 28 in material alms bowl 27 to produce vibration, produces crushing effect by the mutual percussive action between impact block 28;
Step 3: open the 4th operation valve 19, by power knob 1 Vibration on Start-up motor 31, vibration velocity is changed by regulator potentiometer 2, vibration frequency is changed by regulating frequency converter 3, by regulating the relative angle of the first eccentric hammer 32 on vibrating motor 31 and the second eccentric hammer 33 to change vibration amplitude, and record vibration parameters by vibration parameters analyser 6; Observe at regular intervals and record the reading of desorption of mash gas speed determinator 11 in a vibration processes, record the water temperature that in tank 10, thermometer 12 records simultaneously, and record the atmospheric pressure of experimental situation in experimentation, carry out the pulverizing desorption experiment under different vibration condition, until when in desorption of mash gas speed determinator 11, never gas is emerged, stop experiment, powered-down button 1;
Step 4: arrange experimental record, analysis design mothod data, Rule Summary.
The invention is not restricted to above-mentioned embodiment, can also improve, with measure coal sample under vibration adsorption-desorption time deformation rule, by pasting foil gauge in coal sample, measure the distortion of coal sample in vibration processes with dynamic signal testing instrument.
Claims (10)
1. under measuring vibration condition, coal is to an experimental system for desorption of mash gas feature, it is characterized in that comprising frequency conversion vibration system, vibration monitor system, coal sample crushing system, degas system, gas adsorption system and desorption of mash gas system;
Described frequency conversion vibration system involving vibrations motor, shaking platform, shock-absorbing spring, support, frequency converter, power knob and external potentiometer, described vibrating motor is fixed on shaking platform, shaking platform is arranged on above support, is connected between shaking platform with support by shock-absorbing spring; Be respectively arranged with the first eccentric hammer and the second eccentric hammer at the upper/lower terminal of described vibrating motor, described vibrating motor, potentiometer and power knob are connected with frequency converter respectively;
Described vibration monitor system involving vibrations sensor and vibration parameters analyser, described vibration transducer is fixed on shaking platform, and it is connected with vibration parameters analyser;
Described coal sample crushing system comprises material alms bowl and impact block, and described material alms bowl is arranged on shaking platform, and impact block is placed in material alms bowl; Described material alms bowl is configured with gland bonnet, and gland bonnet is provided with valve; Shaking platform is provided with portable beam, and portable beam contacts with material alms bowl gland bonnet;
Described degas system comprises vacuum pump, the 3rd operation valve, the 5th operation valve, vacuum gauge and vacuum meter, described vacuum pump is connected with one end of the 3rd operation valve, the other end one tunnel the 5th operation valve of the 3rd operation valve is connected with the valve on material alms bowl gland bonnet, and another road is connected with vacuum meter through vacuum gauge;
Described gas adsorption system comprises gas cylinder, the first operation valve, pressure regulator valve, tensimeter and the second operation valve, the outlet of described gas cylinder is connected with one end of pressure regulator valve through the first operation valve, the other end of pressure regulator valve is connected through tensimeter one end with the second operation valve, and the other end of the second operation valve is connected with the valve on material alms bowl gland bonnet;
Described desorption of mash gas system comprises desorption of mash gas speed determinator and the 4th operation valve, and described desorption of mash gas speed determinator is fixed in tank, in tank, be provided with thermometer; Described desorption of mash gas speed determinator is connected with the valve on material alms bowl gland bonnet by the 4th operation valve.
2. under mensuration vibration condition according to claim 1, coal, to the experimental system of desorption of mash gas feature, is characterized in that described shock-absorbing spring is provided with six, and the shaft parallel of shock-absorbing spring and vibrating motor is arranged.
3. under mensuration vibration condition according to claim 1, coal, to the experimental system of desorption of mash gas feature, is characterized in that on described shaking platform, be provided with the groove installing material alms bowl, and material alms bowl is arranged in described groove.
4. under mensuration vibration condition according to claim 1, coal, to the experimental system of desorption of mash gas feature, is characterized in that being provided with two handles on described material alms bowl.
5. under mensuration vibration condition according to claim 1, coal, to the experimental system of desorption of mash gas feature, is characterized in that described impact block is right cylinder, adopts hard alloy steel to make.
6. under mensuration vibration condition according to claim 1, coal, to the experimental system of desorption of mash gas feature, is characterized in that the junction of described material alms bowl and gland bonnet is provided with sealing gasket.
7. under mensuration vibration condition according to claim 1, coal, to the experimental system of desorption of mash gas feature, is characterized in that described valve adopts cored screw type, and the bottom of valve extend into inside material alms bowl gland bonnet, is connected with material alms bowl cavity.
8. under mensuration vibration condition according to claim 1, coal, to the experimental system of desorption of mash gas feature, is characterized in that being provided with rubber blanket between described portable beam and material alms bowl gland bonnet.
9. under mensuration vibration condition according to claim 1, coal, to the experimental system of desorption of mash gas feature, is characterized in that being provided with compression handle on described shaking platform, and portable beam is fixed gland bonnet by compressing handle.
10. under adopting mensuration vibration condition according to claim 1, coal is to the experimental technique of the experimental system of desorption of mash gas feature, it is characterized in that, under comprising different vibration condition, coal pulverizes desorption experiment method to coal sample under the adsorption and desorption experiment method of gas and different vibration condition;
Under different vibration condition, coal is to the adsorption and desorption experiment method of gas, comprises the steps:
Step one: prepare before experiment
In fresh getting working face rib samples of coal pulled, after tightly encapsulating, deliver to laboratory, coal sample is made graininess or standard square body or rectangular parallelepiped test specimen, and put into constant temperature oven and dry; Impact block in material alms bowl is taken out, expects in experimentation not place impact block in alms bowl; In check system, whether each pipeline connects the impermeability of reliable and each air-breather, and first, gas cylinder adopts nitrogen gas cylinder to carry out airtight test; Close the second operation valve, open the first operation valve, whether the registration of observed pressure table is stablized, stable then air tight, regulates pressure regulator valve at a slow speed, checks whether pressure regulator valve connects reliably; Close the 4th operation valve and the 5th operation valve, open the second operation valve, check whether material alms bowl leaks gas; Open the 4th operation valve, check whether desorption of mash gas speed determinator connects reliably; Close the second operation valve and the 4th operation valve; Open the 3rd operation valve, start vacuum pump, check whether vacuum gauge is connected reliably with vacuum meter; Open the 5th operation valve, material alms bowl is vacuumized, check whether material alms bowl leaks gas; By power knob Vibration on Start-up motor, regulator potentiometer and frequency converter respectively, observes vibrating effect, checks whether vibration parameters analyser connects reliably simultaneously; After Vibration on Start-up motor, repeat above-mentioned steps again in detection system each pipeline whether connect the impermeability of reliable and each air-breather;
Step 2: coal sample is degassed
Close the 5th operation valve, take off material alms bowl, coal sample is put into material alms bowl, and install sealing gasket and gland bonnet, mention handle and material alms bowl is placed on shaking platform, material alms bowl gland bonnet places rubber blanket, portable beam is pressed on rubber blanket, and put down compress handle gland bonnet is compressed stuck;
Open the 5th operation valve, start vacuum pump degassed to coal sample, continue to vacuumize a few hours, when the pressure registration of vacuum meter remains unchanged, close the 5th operation valve, close vacuum pump;
Step 3: coal sample is adsorbed
Gas cylinder adopts gas gas cylinder, opens the second operation valve and inflates coal sample, controls charge pressure make charge pressure maintain stationary value by pressure regulator valve; Upon adsorption reach balance after, by power knob Vibration on Start-up motor, coal sample adsorption process is made to be in vibration environment, vibration velocity is changed by regulator potentiometer, vibration frequency is changed by regulating frequency converter, by regulating the relative angle of the first eccentric hammer on vibrating motor and the second eccentric hammer to change vibration amplitude, and by vibration parameters analyser record vibration parameters, carry out the adsorption experiment under different vibration condition;
Step 4: coal sample desorb
First, close the first operation valve and the second operation valve, open the 4th operation valve, by power knob Vibration on Start-up motor, making coal sample desorption process be in vibration environment, change vibration velocity by regulator potentiometer, changing vibration frequency by regulating frequency converter, by regulating the relative angle of the first eccentric hammer on vibrating motor and the second eccentric hammer to change vibration amplitude, and by vibration parameters analyser record vibration parameters; Observe at regular intervals and record the reading of a desorption of mash gas speed determinator, recording thermometric water temperature in tank simultaneously, and record the atmospheric pressure of experimental situation in desorption process, carry out the desorption experiment under different vibration condition;
Under different vibration condition, coal sample pulverizes desorption experiment method, comprises the steps:
Step one: in check system, whether each pipeline connects the impermeability of reliable and each air-breather, first, gas cylinder adopts nitrogen gas cylinder to carry out airtight test; Close the second operation valve, open the first operation valve, whether the registration of observed pressure table is stablized, stable then air tight, regulates pressure regulator valve at a slow speed, checks whether pressure regulator valve connects reliably; Close the 4th operation valve and the 5th operation valve, open the second operation valve, check whether material alms bowl leaks gas; Open the 4th operation valve, check whether desorption of mash gas speed determinator connects reliably; By power knob Vibration on Start-up motor, regulator potentiometer and frequency converter respectively, observes vibrating effect, checks whether vibration parameters analyser connects reliably simultaneously; After Vibration on Start-up motor, repeat above-mentioned steps again in detection system each pipeline whether connect the impermeability of reliable and each air-breather;
Step 2: close the second operation valve and the 4th operation valve, take off material alms bowl, coal sample and impact block are put into material alms bowl, and install sealing gasket and gland bonnet, mentioning handle is placed on shaking platform by material alms bowl, material alms bowl gland bonnet places rubber blanket, portable beam is pressed on rubber blanket, and put down and compress handle and gland bonnet is compressed stuck;
Step 3: open the 4th operation valve, by power knob Vibration on Start-up motor, vibration velocity is changed by regulator potentiometer, vibration frequency is changed by regulating frequency converter, by regulating the relative angle of the first eccentric hammer on vibrating motor and the second eccentric hammer to change vibration amplitude, and by vibration parameters analyser record vibration parameters; Observe at regular intervals and record the reading of desorption of mash gas speed determinator in a vibration processes, record thermometric water temperature in tank simultaneously, and record the atmospheric pressure of experimental situation in experimentation, carry out the pulverizing desorption experiment under different vibration condition, until when in desorption of mash gas speed determinator, never gas is emerged, stop experiment, powered-down button.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113834753A (en) * | 2021-09-18 | 2021-12-24 | 华北科技学院(中国煤矿安全技术培训中心) | Isothermal adsorption-desorption system under coal sample vibration condition |
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 |
-
2015
- 2015-06-24 CN CN201510350745.5A patent/CN104990865B/en active Active
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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834753A (en) * | 2021-09-18 | 2021-12-24 | 华北科技学院(中国煤矿安全技术培训中心) | Isothermal adsorption-desorption system under coal sample vibration condition |
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