CN205246474U - A test device for testing coalbed gas absorption desorption rule under loading condition - Google Patents
A test device for testing coalbed gas absorption desorption rule under loading condition Download PDFInfo
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- CN205246474U CN205246474U CN201521060366.4U CN201521060366U CN205246474U CN 205246474 U CN205246474 U CN 205246474U CN 201521060366 U CN201521060366 U CN 201521060366U CN 205246474 U CN205246474 U CN 205246474U
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Abstract
A test device for testing coalbed gas absorption desorption rule under loading condition is including gas feeding device, loading device, evacuating device, thermostated container and gas desorption appearance, gas feeding device includes high -pressure gas jar, relief pressure valve and aeration tank, loading device includes pressure cylinder, piston, pyrocondensation pipe and manual hydraulic pump, and both ends are connected with the admit air high -voltage tube and the high -voltage tube of giving vent to anger respectively about the pyrocondensation pipe, admit air the high -voltage tube other end and aeration tank intercommunication, and the high -voltage tube other end of giving vent to anger is connected with two three -way valves, evacuating device includes vacuum pump and vacuum meter, and the vacuum pump passes through high -voltage tube and two three -way valve intercommunications, gas desorption appearance passes through high -voltage tube and two three -way valve intercommunications, aeration tank all establishes in the thermostated container with the pressure cylinder. The utility model discloses fully consider stress and influence of temperature, under the steady temperature, through changing the apply pressure that the cherry coal coal sample received, carry out gas and adsorb the desorption experiment to the coalbed gas who obtains under the loading condition adsorbs desorption rule.
Description
Technical field
The utility model belongs to gas experimental rig technical field, relates in particular to a kind of for testing coal seam under loaded conditionThe experimental rig of gas adsorption adsorption law.
Background technology
Adsorption-desorption is one of the most basic migrational mode of coal-bed gas, differentiates the adsorption-desorption rule of coal-bed gas to meState's coal mine gas diaster prevention and control is significant. What people often adopted in the time of the adsorption-desorption rule of research coal containing methane gas isThe not particulate coal of stand under load, but well-known, the tax dis environment in coal seam is the complex environment of a stress-temperature coupling, thereforeDo not consider that the coal-bed gas adsorption-desorption rule that stress influence obtains is untrue, insecure, carry out so necessaryCoal-bed gas adsorption-desorption rule under loaded condition.
Utility model content
The utility model is in order to solve weak point of the prior art, provide a kind of simple in structure, test operation is easy,Can change the on-load pressure of cherry coal coal sample, simulation constant temperature and different load-up conditions, measure cherry coal coal sample and carry in differenceThe test for testing coal-bed gas adsorption-desorption rule under loaded condition of the gas adsorption amount under lotus condition and desorption quantity fillsPut.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: for testing coal seam under loaded conditionThe experimental rig of gas adsorption adsorption law, comprises gas feedway, charger, vacuum extractor, insulating box and gasDesorption instrument; Gas feedway comprises high pressure gas tank, pressure-reducing valve and gasing tank, between high pressure gas tank and gasing tank by fillingGas high-voltage tube be communicated with, pressure-reducing valve be located at inflation high-voltage tube on, on the inflation high-voltage tube between high pressure gas tank and pressure-reducing valve by wattThis circulating direction series connection is provided with the first valve and the first air gauge, on the inflation high-voltage tube between pressure-reducing valve and gasing tank, presses gasCirculating direction series connection is provided with the second air gauge and the second valve, and gasing tank is provided with temperature sensor and pressure sensor; LoadDevice comprises pressure cylinder, piston, heat-shrink tube and hydraulic hand-pump, on the sidewall of pressure cylinder left and right, is equipped with alignment pin, and piston is along axleTo inserting in pressure cylinder and being sealed and matched with pressure cylinder, piston is positioned at alignment pin below, and pressure cylinder and piston form a pressureChamber, heat-shrink tube is positioned at balancing gate pit, and two ends, heat-shrink tube left and right are connected with respectively air inlet high-voltage tube and the high-voltage tube of giving vent to anger, air inlet high pressureThe pipe other end is communicated with gasing tank, and the high-voltage tube other end of giving vent to anger is connected with two-position three-way valve, and air inlet high-voltage tube is provided with the 3rd valveDoor, is communicated with by liquid high pressure pipe between pressure cylinder and hydraulic hand-pump, on liquid high pressure pipe, is provided with the along liquid communication directionFour valves and hydralic pressure gauge, pressure cylinder bottom is connected with drainpipe, and drainpipe is provided with the 5th valve; Vacuum extractor comprises vacuumPump and vacuum meter, vavuum pump is communicated with two-position three-way valve by vacuum high-pressure pipe, and vacuum meter is located on vacuum high-pressure pipe, vacuum meterAnd the vacuum high-pressure pipe between two-position three-way valve is provided with the 6th valve; Desorption of mash gas instrument is by gas high-voltage tube and two-bit tripletValve is communicated with, and on the gas high-voltage tube between desorption of mash gas instrument and two-position three-way valve, connects and is provided with the 3rd air pressure along gas circulating directionTable and the 7th valve; Gasing tank and pressure cylinder are all located in insulating box.
The temperature regulating range of insulating box is 0 DEG C-80 DEG C, and the on-load pressure adjustable range of loading system is 0-40MPa.
Adopt technique scheme, the utlity model has following advantage:
1, the utility model comprises gas feedway, charger, vacuum extractor, insulating box and desorption of mash gas instrument,It is simple in structure, and gas feedway utilizes high pressure gas tank that methane gas is provided, and by pressure-reducing valve, gas pressure is adjusted toTest required pressure size, and be filled with in gasing tank, utilize gasing tank to inject methane gas in coal sample, make like this coal sampleFully adsorption gas is until reach adsorption equilibrium, and changes in conjunction with pressure duct by the pressure of observing methane gas in gasing tankInterior gas bearing capacity, just can calculate the size of coal sample adsorption-desorption amount; In charger, pressure cylinder and piston have formed a pressurePower chamber is injected distilled water by hydraulic hand-pump in pressure cylinder, makes the pressure in balancing gate pit reach preset value, realizes coalThe loading of sample, easy and simple to handle; Finally obtain desorption of mash gas amount rule over time by the variation of desorption of mash gas instrument reading.
2, gasing tank of the present utility model and pressure cylinder are all located in insulating box, make system temperature constant, get rid of source of the gasThe interference that temperature is different is carried out coal sample gas adsorption desorption experiment under same temperature, can realize integrality and the company of testContinuous property.
3, vacuum extractor of the present utility model utilizes vavuum pump to carry out degassed processing to whole test pipeline, guarantees testIn process, only have methane gas to participate in test, thereby get rid of the interference of other gases to result of the test. The utility model is eachThe pressure-bearing pipeline at place is high-voltage tube, can strict control piper length, as much as possible reduce the free space of pipeline, and make testData are more accurate.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
As shown in Figure 1, of the present utility model for testing the test dress of coal-bed gas adsorption-desorption rule under loaded conditionPut, comprise gas feedway, charger, vacuum extractor, insulating box 1 and desorption of mash gas instrument 2; Gas feedway comprisesHigh pressure gas tank 3, pressure-reducing valve 4 and gasing tank 5, be communicated with by inflation high-voltage tube 31 between high pressure gas tank 3 and gasing tank 5, subtractsPressure valve 4 is located on inflation high-voltage tube 31, on the inflation high-voltage tube 31 between high pressure gas tank 3 and pressure-reducing valve 4, presses gas circulation sideBe provided with the first valve 6 and the first air gauge 7 to series connection, on the inflation high-voltage tube 31 between pressure-reducing valve 4 and gasing tank 5, press Gas-FlowLogical direction series connection is provided with the second air gauge 8 and the second valve 9, and gasing tank 5 is provided with temperature sensor 10 and pressure sensor 11;Charger comprises pressure cylinder 12, piston 13, heat-shrink tube 14 and hydraulic hand-pump 15, and it is fixed on pressure cylinder 12 left and right sidewalls, to be equipped withPosition pin 16, piston 13 inserts vertically in pressure cylinder 12 and is sealed and matched with pressure cylinder 12, and piston 13 is positioned at alignment pin 16 belows,Pressure cylinder 12 and piston 13 form a balancing gate pit 17, and heat-shrink tube 14 is positioned at balancing gate pit 17, and heat-shrink tube 14 two ends, left and right respectivelyBe connected with air inlet high-voltage tube 18 and the high-voltage tube 19 of giving vent to anger, air inlet high-voltage tube 18 other ends are communicated with gasing tank 5, the high-voltage tube 19 of giving vent to angerThe other end is connected with two-position three-way valve 20, and air inlet high-voltage tube 18 is provided with the 3rd valve 21, pressure cylinder 12 and hydraulic hand-pump 15Between be communicated with by liquid high pressure pipe 32, on liquid high pressure pipe 32, be provided with the 4th valve 22 and hydralic pressure gauge along liquid communication direction23, pressure cylinder 12 bottoms are connected with drainpipe 24, and drainpipe 24 is provided with the 5th valve 25; Vacuum extractor comprises vavuum pump 26With vacuum meter 27, vavuum pump 26 is communicated with two-position three-way valve 20 by vacuum high-pressure pipe 33, and vacuum meter 27 is located at vacuum high-pressure pipeOn 33, the vacuum high-pressure pipe 33 between vacuum meter 27 and two-position three-way valve 20 is provided with the 6th valve 28; Desorption of mash gas instrument 2 passes throughGas high-voltage tube 34 is communicated with two-position three-way valve 20, on the gas high-voltage tube 34 between desorption of mash gas instrument 2 and two-position three-way valve 20Be provided with the 3rd air gauge 29 and the 7th valve 30 along the series connection of gas circulating direction; Gasing tank 5 is all located at insulating box 1 with pressure cylinder 12In. High pressure gas tank 3 is commercially available methane Standard Gases, and volume is 40L/ bottle, purity >=99.99%, and inflation high-voltage tube 31, air inlet is highThe withstand voltage of pressure pipe 18, the high-voltage tube 19 of giving vent to anger, liquid high pressure pipe 32, the gentle height pressure pipe 34 of vacuum high-pressure pipe 33 60MPa withOn.
The temperature regulating range of insulating box 1 be 0-80 DEG C (degree Celsius), the on-load pressure adjustable range of loading system is 0-40MPa(MPa).
Wherein, insulating box, heat-shrink tube, hydraulic hand-pump, temperature sensor, pressure sensor, vavuum pump and desorption of mash gasInstrument etc. are the existing routine techniques in this area, and its concrete structure no longer describes in detail.
For the test method of testing the experimental rig of coal-bed gas adsorption-desorption rule under loaded condition, comprise successively withLower step:
(1) close all valves, unload two alignment pins 16 on pressure cylinder 12 left and right sidewalls, take off piston 13, clipThe heat-shrink tube 14 of 30 centimetres loads cherry coal coal sample in heat-shrink tube 14, by air inlet high-voltage tube 18 and give vent to anger high-voltage tube 19 respectively byIn the left of heat-shrink tube and right-hand insertion heat-shrink tube and stretch into 5 centimetres of heat-shrink tubes; Utilize hair dryer to heat heat-shrink tube 14, pyrocondensationPipe 14 be heated after-contraction tight parcel cherry coal coal sample, simultaneously heat-shrink tube 14 two ends, left and right tight parcel air inlet high-voltage tube 18 respectivelyStretch into the end of heat-shrink tube 14 with the high-voltage tube 19 of giving vent to anger;
(2) piston 13 is inserted to pressure cylinder 12 vertically, and alignment pin 16 is inserted to pressure cylinder 12 left and right sidewalls, openFour valves 22, utilize hydraulic hand-pump 15 to pump into distilled water in pressure cylinder 12, make the pressure in balancing gate pit reach predetermined value,Predetermined value is (as 10MPa) between 0-40MPa, and simultaneously piston 13 moves up and holds out against alignment pin 16 under the effect of pressure,Close the 4th valve 22;
(3) open the second valve 9 and the 3rd valve 21, by two-position three-way valve 20 will give vent to anger high-voltage tube 19 and vavuum pump 26Be communicated with, start vavuum pump 26, open the 6th valve 28, whole system is carried out to degassed processing, sentence according to the reading of vacuum meter 27The disconnected vacuum requirement that whether reaches test, after the vacuum that reaches test requires, closes vavuum pump 26, the second valve 9, the 3rdValve 21 and the 6th valve 28;
(4) open the first valve 6 and the second valve 9, regulate pressure-reducing valve 4 that gas pressure is adjusted to predetermined pressure (experimentDesigner determines predetermined pressure according to the target coal sample of the required simulation of simulated test, makes coal sample adsorption gas under predetermined pressureGas reaches poised state, can simulate target coal sample thereby prepare. Determining after the target coal sample that will simulate, determinePredetermined pressure is those skilled in the art's conventional ability), in gasing tank 5, be filled with methane gas by high pressure gas tank 3, fillAfter entering, close the first valve 6 and the second valve 9, start insulating box 1, set test temperature, test temperature 0-80 DEG C itBetween (as 20 DEG C), in the time that the reading on temperature sensor 10 is consistent with set temperature value on insulating box 1, open the 3rd valve 21Start to carry out adsorption test, be filled with methane gas by gasing tank 5 in coal sample, the abundant adsorption gas of coal sample, until absorption is flatWeighing apparatus, coal sample reaches after adsorption equilibrium, closes the 3rd valve 21, changes according to the detected pressure of pressure sensor 11, deductsAir inlet high-voltage tube 18 and the gas amount of giving vent to anger in high-voltage tube 19, utilize the equation of gas state (general knowledge known in this field) to calculate and produce coalThe gas adsorption amount size of sample;
(5) after adsorption test completes, be communicated with desorption of mash gas instrument 2 by two-position three-way valve 20 high-voltage tube 19 of giving vent to anger, beatOpen the 7th valve 30 and start to carry out desorption experiment, in the time that the gauge pressure of the 3rd air gauge 29 is down to zero, start to remember with desorption of mash gas instrument 2Record coal sample desorption quantity temporal evolution situation, in earlier stage, desorption quantity changes very fast in desorb, and the time interval of recording desorption of mash gas amount is30s, in the desorb later stage, desorption quantity changes slower, and recording the desorption of mash gas amount time interval is 60s, when no longer including gas solution in coal sampleAfter sucking out, close the 7th valve 30, draw out coal sample desorption quantity curve over time according to test data, thereby obtainDesorption of mash gas total amount;
(6), after gas adsorption desorption experiment finishes, open the 5th valve 25, by the distilled water in pressure cylinder 12 by drainingPipe 24 is discharged;
(7) above (1)～(6) step is a load test, repeats above (1)～(6) step, carries out repeatedly load examinationTest, each load test keeps the cherry coal coal sample quality of loading in heat-shrink tube in (1) step to equate, and changes (2) stepPressure predetermined value in Zhou Zhong balancing gate pit is to simulate different load-up conditions.
In step (1), in air inlet high-voltage tube 18, the gap of giving vent to anger between high-voltage tube 19 and heat-shrink tube 14, insert a small amount ofLiquid silastic, after liquid silastic solidifies completely, then carries out (2) step.
Of the present utility model for testing the test side of the experimental rig of coal-bed gas adsorption-desorption rule under loaded conditionMethod, is difficult to the present situation of imposed load based on structure cherry coal, and the residing pressure-temperature coupling in coal seam is composed the objective of dis environment and deposited, adopt charger to exert pressure to cherry coal coal sample, effectively solve the loading problem of structure cherry coal, and can pass throughChange hydraulic hand-pump to inject in pressure cylinder distilled water number, obtain different force value, easy and simple to handle, pass according to pressureThe detected pressure change calculations of sensor goes out gas adsorption amount, obtains desorption of mash gas amount by the variation of desorption of mash gas instrument readingRule over time, thus desorption of mash gas total amount obtained; By the gas adsorption amount of contrast under different loads condition andDesorption quantity, obtains the coal-bed gas adsorption-desorption rule under loaded condition, for coal mine gas diaster prevention and control provides theory support, fromAnd instruct corresponding colliery engineering practice, and take to prevent more targetedly and safeguard procedures, have for Safety of Coal Mine ProductionSignificance.
The present embodiment is not done any pro forma restriction, every foundation to shape of the present utility model, material, structure etc.Any simple modification, equivalent variations and modification that technical spirit of the present utility model is done above embodiment, all belong to this realityWith the protection domain of new technique scheme.
Claims (2)
1. for testing the experimental rig of coal-bed gas adsorption-desorption rule under loaded condition, it is characterized in that: comprise that gas suppliesGive device, charger, vacuum extractor, insulating box and desorption of mash gas instrument; Gas feedway comprises high pressure gas tank, decompressionValve and gasing tank, be communicated with by inflation high-voltage tube between high pressure gas tank and gasing tank, and pressure-reducing valve is located on inflation high-voltage tube, heightPress on the inflation high-voltage tube between gas pot and pressure-reducing valve and connect and be provided with the first valve and the first air gauge by gas circulating direction,On inflation high-voltage tube between pressure-reducing valve and gasing tank, connect and be provided with the second air gauge and the second valve by gas circulating direction, fillGas tank is provided with temperature sensor and pressure sensor; Charger comprises pressure cylinder, piston, heat-shrink tube and hydraulic hand-pump,On the sidewall of pressure cylinder left and right, be equipped with alignment pin, piston inserts vertically in pressure cylinder and is sealed and matched with pressure cylinder, piston positionIn alignment pin below, pressure cylinder and piston form a balancing gate pit, and heat-shrink tube is positioned at balancing gate pit, and two ends, heat-shrink tube left and right respectivelyBe connected with air inlet high-voltage tube and the high-voltage tube of giving vent to anger, the air inlet high-voltage tube other end is communicated with gasing tank, and the high-voltage tube other end of giving vent to anger connectsBe connected to two-position three-way valve, air inlet high-voltage tube is provided with the 3rd valve, between pressure cylinder and hydraulic hand-pump by liquid high pressure pipeBe communicated with, on liquid high pressure pipe, be provided with the 4th valve and hydralic pressure gauge along liquid communication direction, pressure cylinder bottom is connected with drainpipe, rowWater pipe is provided with the 5th valve; Vacuum extractor comprises vavuum pump and vacuum meter, and vavuum pump is by vacuum high-pressure pipe and two threeLogical valve is communicated with, and vacuum meter is located on vacuum high-pressure pipe, and the vacuum high-pressure pipe between vacuum meter and two-position three-way valve is provided with the 6thValve; Desorption of mash gas instrument is communicated with two-position three-way valve by gas high-voltage tube, the gas between desorption of mash gas instrument and two-position three-way valveIn height pressure pipe, be provided with the 3rd air gauge and the 7th valve along the series connection of gas circulating direction; Gasing tank and pressure cylinder are all located at constant temperatureIn case.
2. according to claim 1 for testing the experimental rig of coal-bed gas adsorption-desorption rule under loaded condition, itsBe characterised in that: the temperature regulating range of insulating box is 0-80 DEG C, the on-load pressure adjustable range of loading system is 0-40MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521060366.4U CN205246474U (en) | 2015-12-18 | 2015-12-18 | A test device for testing coalbed gas absorption desorption rule under loading condition |
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| CN201521060366.4U CN205246474U (en) | 2015-12-18 | 2015-12-18 | A test device for testing coalbed gas absorption desorption rule under loading condition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571979A (en) * | 2015-12-18 | 2016-05-11 | 河南理工大学 | System and method for loaded structure soft coal gas adsorption desorption test |
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- 2015-12-18 CN CN201521060366.4U patent/CN205246474U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571979A (en) * | 2015-12-18 | 2016-05-11 | 河南理工大学 | System and method for loaded structure soft coal gas adsorption desorption test |
| CN105571979B (en) * | 2015-12-18 | 2018-04-13 | 河南理工大学 | Stand under load tectonic soft coal gas adsorption desorption experiment system and method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160518 Effective date of abandoning: 20180413 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20160518 Effective date of abandoning: 20180413 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |