CN205333462U - A servo measurement testing system for testing coal sample gas absorption desorption rule - Google Patents

A servo measurement testing system for testing coal sample gas absorption desorption rule Download PDF

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Publication number
CN205333462U
CN205333462U CN201620077824.3U CN201620077824U CN205333462U CN 205333462 U CN205333462 U CN 205333462U CN 201620077824 U CN201620077824 U CN 201620077824U CN 205333462 U CN205333462 U CN 205333462U
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China
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gas
tank
valve
coal sample
airway
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CN201620077824.3U
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Chinese (zh)
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王登科
孙刘涛
王洪磊
彭明
刘淑敏
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Henan University of Technology
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Henan University of Technology
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Abstract

A servo measurement testing system for testing coal sample gas absorption desorption rule is including gas feeding device, evacuating device, gas adsorption equipment, gas desorption measuring device and electrically controlled device, gas feeding device includes high -pressure gas jar and aeration tank, evacuating device includes vacuum pump and vacuum meter, gas adsorption equipment includes the coal sample jar, gas desorption measuring device includes water container, collecting container, electronic balance, servo motor, fixed bolster and aqueduct. The utility model discloses a turn into the measurement of aqueous water volume with the gaseous cubing of gas desorption, the test operation is simple and convenient, and the tentation data is accurate, has realized that the real -time accurate automatic acquisition of tentation data shows with real -time to guarantee that gas that the coal sample separated the suction under an atmospheric pressure condition, for research coal body gas adsorbs desorption rule, provides more reliable data basis.

Description

Servo for testing coal sample gas adsorption adsorption law measures pilot system
Technical field
This utility model belongs to gas adsorption desorbing measurement apparatus technical field, particularly relates to a kind of servo for testing coal sample gas adsorption adsorption law and measures pilot system。
Background technology
Coal gas adsorption law is that coal seam gas-bearing capacity provides theoretical foundation with piezometry, Coal and Gas Outbursts Prediction and coal bed gas resource exploration and development etc.。The adsorption-desorption rule of coal body has been carried out substantial amounts of research by current people, on the one hand according to desorption of mash gas rule counting loss gas amount, seeks outburst danger prediction index and marginal value thereof on the other hand according to desorption of mash gas rule。The research method of present stage coal gas adsorption law mainly adopts absorption-desorption experimental technique, and the desorption of mash gas initial stage rule studying coal body mainly measures desorption rate and the desorption quantity of coal sample gas, the determinator of current coal sample desorption of mash gas speed and desorption quantity is desorption of mash gas instrument, the technology of this equipment is very ripe, and the measurement major part of desorption of mash gas amount adopts and marks graduated graduated cylinder, this kind of device is used still to have the following disadvantages: 1, testing crew to spend substantial amounts of time and efforts to record data, big by the error existing for artificial reading, and can not real-time recorded data;2, when the scale of read volume liquid within the cartridge volume, causing the fluctuation of liquid level in graduated cylinder due to drainage, can affect testing crew and read data, when especially gas initial solution pumping phases desorption of mash gas amount is bigger, experimenter is difficult to accurately read data;3, current drainage measures gas volume, water could be discharged when the pressure of gas is more than an atmospheric pressure so that the methane gas that coal sample desorbs is more than an atmospheric pressure, and methane gas volume now can change, and there is error。
Utility model content
This utility model is in order to solve weak point of the prior art, provide a kind of test operation easy, test data is accurate, can real-time automatic collecting data, and guarantee that the methane gas of the coal sample solution sucking-off servo for testing coal sample gas adsorption adsorption law under an atmospheric pressure measures pilot system。
For solving above-mentioned technical problem, this utility model adopts the following technical scheme that the servo for testing coal sample gas adsorption adsorption law measures pilot system, including gas feedway, vacuum extractor, gas adsorption device, desorption of mash gas measurement apparatus and electric control gear;Gas feedway includes high pressure gas tank and gasing tank, connected by airway between high pressure gas tank and gasing tank, the outlet side of high pressure gas tank is provided with controlled valve, the airway between high pressure gas tank and gasing tank is sequentially connected in series along gas circulating direction and is provided with air relief valve, the first air gauge, the first three-way valve and the first valve;Vacuum extractor includes vacuum pump and vacuometer, and vacuum pump is by airway and the connection of the first three-way valve, and vacuometer is located on the airway between vacuum pump and the first three-way valve, and the airway between vacuometer and vacuum pump is provided with the second valve;Gas adsorption device includes coal sample tank, connected by airway between gasing tank with coal sample tank, the airway between gasing tank and coal sample tank is sequentially connected in series along gas circulating direction and is provided with the second air gauge, the 3rd valve, the second three-way valve, the 4th valve and the 3rd air gauge;Desorption of mash gas measurement apparatus includes tank, collecting container, electronic balance, servomotor, fixed support and aqueduct, tank is closed structure, tank top is provided with water inlet pipe, water inlet pipe is provided with inlet valve, tank top is by airway and the connection of the second three-way valve, airway between tank and the second three-way valve is provided with the 5th valve, tank is connected to digital pressure gauge, drain pipe it is provided with bottom tank, drain pipe connects with aqueduct, aqueduct is flexible pipe and is arranged in fixed support, fixed support bottom is fixedly connected on the output shaft of servomotor, servomotor is connected to servo-driver by wire, collecting container open topped is also positioned at the lower section in aqueduct exit, collecting container is arranged on electronic balance, digital pressure gauge, servo-driver and electronic balance are connected with electric control gear respectively through wire。
Electric control gear adopts computer or single-chip microcomputer or PLC or integrated circuit。
Adopting technique scheme, this utility model has the advantage that
1, the servo measurement pilot system for testing coal sample gas adsorption adsorption law of the present utility model includes gas feedway, vacuum extractor, gas adsorption device, desorption of mash gas measurement apparatus and electric control gear, gas feedway utilizes high pressure gas tank to provide methane gas, by air relief valve, gas pressure is adjusted to the pressure size that test is required, and it is filled with in gasing tank, utilizing gasing tank to inject methane gas in coal sample, so making the abundant adsorption gas of coal sample until reaching adsorption equilibrium;Vacuum extractor utilizes vacuum pump that whole pilot system is carried out degassed process, it is ensured that in process of the test, only methane gas participates in test, thus getting rid of the interference to result of the test of other gases;Gas adsorption device is for the gas adsorption desorption experiment of coal sample;Desorption of mash gas measurement apparatus is used for measuring desorption of mash gas speed and desorption quantity;Electric control gear is for Real-time Collection, storage and shows methane gas desorption quantity and desorption rate;
2, this utility model adopts desorption of mash gas measurement apparatus, after proceeding by desorption of mash gas test, the methane gas desorbed enters the top of tank by airway, tank top gas pressure is made to raise, digital pressure gauge the desorbing methane gas pressure that detects is raised after value real-time Transmission to electric control gear, electric control gear makes servomotor rotate by controlling servo-driver, owing to fixed support bottom is fixed on the output shaft of servomotor, aqueduct and fixed support are followed servomotor and are turned clockwise, aqueous water in tank is discharged through drain pipe and aqueduct and is flowed in collecting container, water level in aqueduct is always positioned on same plane with the water level in tank owing to being connected, realize desorbing methane gas to keep at one atm, avoid the methane gas volume solving sucking-off to change, electronic balance by collecting container aqueous water quality value added and in collecting container the mass accumulation real-time data transmission of aqueous water to electric control gear, the test data reduction that electronic balance transmits is become desorption of mash gas amount and desorption rate and shows in real time by electric control gear, achieve desorption of mash gas speed and automatically gathering of desorption of mash gas amount data shows with real-time, adopt said apparatus, data acquisition is accurately quick, avoid the error existing for artificial reading, improve the accuracy rate of test, save data processing time, it is easy to scientific research personnel and analyzes result of the test better。
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model。
Detailed description of the invention
As it is shown in figure 1, the servo for testing coal sample gas adsorption adsorption law of the present utility model measures pilot system, including gas feedway, vacuum extractor, gas adsorption device, desorption of mash gas measurement apparatus and electric control gear 1;Gas feedway includes high pressure gas tank 2 and gasing tank 3, connected by airway 4 between high pressure gas tank 2 with gasing tank 3, the outlet side of high pressure gas tank 2 is provided with controlled valve 5, the airway 4 between high pressure gas tank 2 and gasing tank 3 is sequentially connected in series along gas circulating direction and is provided with air relief valve the 6, first air gauge the 7, first three-way valve 8 and the first valve 9;Vacuum extractor includes vacuum pump 10 and vacuometer 11, vacuum pump 10 is connected with the first three-way valve 8 by airway 4, vacuometer 11 is located on the airway 4 between vacuum pump 10 and the first three-way valve 8, and the airway 4 between vacuometer 11 and vacuum pump 10 is provided with the second valve 12;Gas adsorption device includes coal sample tank 13, connected by airway 4 between gasing tank 3 with coal sample tank 13, the airway 4 between gasing tank 3 and coal sample tank 13 is sequentially connected in series along gas circulating direction and is provided with the second air gauge the 14, the 3rd valve the 15, second three-way valve the 16, the 4th valve 17 and the 3rd air gauge 18;Desorption of mash gas measurement apparatus includes tank 19, collecting container 20, electronic balance 21, servomotor 22, fixed support 23 and aqueduct 24, tank 19 is in closed structure, tank 19 top is provided with water inlet pipe 25, water inlet pipe 25 is provided with inlet valve 26, tank 19 top is connected with the second three-way valve 16 by airway 4, airway 4 between tank 19 and the second three-way valve 16 is provided with the 5th valve 27, tank 19 is connected to digital pressure gauge 28, drain pipe 29 it is provided with bottom tank 19, drain pipe 29 connects with aqueduct 24, aqueduct 24 is for flexible pipe and is arranged in fixed support 23, fixed support 23 bottom is fixedly connected on the output shaft of servomotor 22, servomotor 22 is connected to servo-driver 30 by wire, collecting container 20 open topped is also positioned at the lower section in aqueduct 24 exit, collecting container 20 is arranged on electronic balance 21, digital pressure gauge 28, servo-driver 30 and electronic balance 21 are connected with electric control gear 1 respectively through wire。The methane gas being filled with in high pressure gas tank 2 is commercially available methane Standard Gases, and volume is 40L/ bottle, purity >=99.99%, and the pressure voltage of airway 4 is at more than 60MPa。
Electric control gear 1 adopts computer or single-chip microcomputer or PLC or integrated circuit。
Its intermediate pump 10, servomotor 22, servo-driver 30, electronic balance 21 and digital pressure gauge 28 etc. are the existing routine techniques in this area, and its concrete structure no longer describes in detail。
Servo for testing coal sample gas adsorption adsorption law is measured the test method of pilot system and is comprised the following steps successively:
(1) on down-hole mining work surface, block fresh coal sample is drilled through, ground experiment room is delivered to after carrying out tightly encapsulation, fresh coal sample is pulverized, is sieved into different granularities, it is reliable that checkout facility system guarantees that pilot system connects, and guarantees that pilot system air-tightness is good by the air-tightness of helium checkout facility system;
(2) in coal sample tank 13, coal sample is loaded;
(3) open inlet valve 26 and in tank 19, fill aqueous water 31 by water inlet pipe 25, be then shut off inlet valve 26;
(4) closing switch valve 5, air relief valve 6 and the 5th valve 27, open the first valve the 9, second valve the 12, the 3rd valve 15 and the 4th valve 17, start the vacuum pump 10 airway 4 to gasing tank 3, coal sample tank 13 and connection gasing tank 3 and coal sample tank 13 and carry out degassed process, until vacuometer 11 shows that 20Pa more than six hours closes vacuum pump 10, simultaneously close off the second valve 12 and the 3rd valve 15;
(5) controlled valve 5 of high pressure gas tank 2 is opened, air relief valve 6 is regulated according to the first air gauge 7, it is filled with methane gas to gasing tank 3 by high pressure gas tank 2, when the registration of the second air gauge 14 reaches the scheduled pressure value of gasing tank 3, closing switch valve 5 and the first valve 9, open the 3rd valve 15 and proceed by gas adsorption test, in coal sample tank 13, it is filled with methane gas by gasing tank 3, coal sample is fully adsorbed until adsorption equilibrium, when continuous three hours of the registration of the second air gauge 14 is constant and adsorption time was more than ten hours, coal sample reaches adsorption equilibrium;
(6) after gas adsorption has been tested, close the 3rd valve 15, open the 5th valve 27, proceed by desorption of mash gas test, the methane gas desorbed enters the top of tank 19 by airway 4, tank 19 top gas pressure is made to raise, digital pressure gauge 28 the desorbing methane gas pressure that detects is raised after value real-time Transmission to electric control gear 1, electric control gear 1 makes servomotor 22 rotate by controlling servo-driver 30, aqueduct 24 and fixed support 23 are followed servomotor 22 and are turned clockwise, aqueous water 31 in tank 19 is discharged through drain pipe 29 and aqueduct 24 and is flowed in collecting container 20, water level in aqueduct 24 is always positioned on same plane with the water level in tank 19 owing to being connected, realize desorbing methane gas to keep at one atm, electronic balance 21 by collecting container 20 aqueous water 31 quality value added and in collecting container 20 the mass accumulation real-time data transmission of aqueous water 31 to electric control gear 1, the test data reduction that electronic balance 21 transmits is become desorption of mash gas amount and desorption rate simultaneously and shows in real time by electric control gear 1, achieve desorption of mash gas speed and automatically gathering of desorption of mash gas amount data shows with real-time;
(7) arranging experimental data, the final desorption of mash gas amount of coal sample is that the desorption of mash gas amount that test records deducts pilot system dead space and the volume of coal sample internal void space。
After detection pilot system air-tightness, the volume V of the dead space of pilot system being demarcated in step (1), gasing tank 3 and coal sample tank 13 are carried out evacuation process, airway 4 and the cumulative volume of gasing tank 3 between the first valve 9 and the 3rd valve 15 are set to V1, the cumulative volume of the airway 4 between airway the 4, the 5th valve 27 and the second three-way valve 16 between the 3rd valve 15 and the second three-way valve 16, the airway 4 between coal sample tank 13 and the second three-way valve 16 and coal sample tank 13 is set to V2, close the second valve the 12, the 3rd valve the 15, the 4th valve 17 and the 5th valve 27, open the first valve 9, in gasing tank 3, charged pressure is P1Helium, after the second air gauge 14 is stable, closes the first valve 9, open the 3rd valve 15 and the 4th valve 17, helium is entered into coal sample tank 13 by gasing tank 3, after the second air gauge 14 is stable, writes down the second air gauge 14 registration P2, P can be obtained according to The Ideal-Gas Equation1V1=P2(V1+V2);Putting into volume in coal sample tank 13 is V0Aluminum post, gasing tank 3 and coal sample tank 13 are carried out evacuation process, close the second valve the 12, the 3rd valve the 15, the 4th valve 17 and the 5th valve 27, open the first valve 9, in gasing tank 3, charged pressure is P3Helium, after the second air gauge 14 is stable, closes the first valve 9, open the 3rd valve 15 and the 4th valve 17, helium is entered into coal sample tank 13 by gasing tank 3, after the second air gauge 14 is stable, writes down the second air gauge 14 registration P4, P can be obtained according to The Ideal-Gas Equation3V1=P4(V1+V2-V0), thus calculating V1And V2Value, the volume V=V of the dead space of pilot system1+V2
Step (2) has been loaded the volume V to the void space within coal sample after coal sampleHoleDemarcating, the coal sample quality in coal sample tank 13 is m, and the apparent density of coal sample is ρDepending on, the apparent volume V of coal sampleDepending on=m/ρDepending on, gasing tank 3 and coal sample tank 13 are carried out evacuation process, closes the second valve the 12, the 3rd valve the 15, the 4th valve 17 and the 5th valve 27, open the first valve 9, in gasing tank 3, charged pressure is P5Helium, after the second air gauge 14 is stable, closes the first valve 9, open the 3rd valve 15 and the 4th valve 17, helium is entered into coal sample tank 13 by gasing tank 3, after the second air gauge 14 is stable, writes down the second air gauge 14 registration P6, P can be obtained according to The Ideal-Gas Equation5V1=P6(V-VDepending on+VHole), thus calculating the volume V of void space within coal sampleHole
Servo for testing coal sample gas adsorption adsorption law of the present utility model measures the test method of pilot system, it is possible to carry out following various test:
(1) coal gas adsorption-desorption Rule;
(2) isothermal adsorption test, Methane Diffusion test。
Servo for testing coal sample gas adsorption adsorption law of the present utility model measures the test method of pilot system, the cubing of desorption of mash gas gas is converted into the measurement of aqueous water volume, and realize test data accurately collection automatically in real time, data are read without testing crew, reduce human error, mainly solve the difficult problem that gas initial solution pumping phases desorption of mash gas amount cannot accurately be measured greatly, for research coal body desorption of mash gas rule, provide relatively reliable data basis, so that laboratory test results theoretical direction such as Coal and Gas Outbursts Prediction, the realistic problem such as bed gas reservoir exploitation。
Servo for testing coal sample gas adsorption adsorption law of the present utility model measures the test method of pilot system, the volume V to the void space within the volume V of the dead space of pilot system and coal sampleHoleDemarcating, the final desorption of mash gas amount of coal sample is the volume V that the desorption of mash gas amount that test records deducts the void space within the volume V of pilot system dead space and coal sampleHoleSo that the data that test records are more accurate, more convincing。
Shape of the present utility model, material, structure etc. are not done any pro forma restriction by the present embodiment; every any simple modification, equivalent variations and modification above example made according to technical spirit of the present utility model, belongs to the protection domain of technical solutions of the utility model。

Claims (2)

1. the servo for testing coal sample gas adsorption adsorption law measures pilot system, it is characterised in that: include gas feedway, vacuum extractor, gas adsorption device, desorption of mash gas measurement apparatus and electric control gear;Gas feedway includes high pressure gas tank and gasing tank, connected by airway between high pressure gas tank and gasing tank, the outlet side of high pressure gas tank is provided with controlled valve, the airway between high pressure gas tank and gasing tank is sequentially connected in series along gas circulating direction and is provided with air relief valve, the first air gauge, the first three-way valve and the first valve;Vacuum extractor includes vacuum pump and vacuometer, and vacuum pump is by airway and the connection of the first three-way valve, and vacuometer is located on the airway between vacuum pump and the first three-way valve, and the airway between vacuometer and vacuum pump is provided with the second valve;Gas adsorption device includes coal sample tank, connected by airway between gasing tank with coal sample tank, the airway between gasing tank and coal sample tank is sequentially connected in series along gas circulating direction and is provided with the second air gauge, the 3rd valve, the second three-way valve, the 4th valve and the 3rd air gauge;Desorption of mash gas measurement apparatus includes tank, collecting container, electronic balance, servomotor, fixed support and aqueduct, tank is closed structure, tank top is provided with water inlet pipe, water inlet pipe is provided with inlet valve, tank top is by airway and the connection of the second three-way valve, airway between tank and the second three-way valve is provided with the 5th valve, tank is connected to digital pressure gauge, drain pipe it is provided with bottom tank, drain pipe connects with aqueduct, aqueduct is flexible pipe and is arranged in fixed support, fixed support bottom is fixedly connected on the output shaft of servomotor, servomotor is connected to servo-driver by wire, collecting container open topped is also positioned at the lower section in aqueduct exit, collecting container is arranged on electronic balance, digital pressure gauge, servo-driver and electronic balance are connected with electric control gear respectively through wire。
2. the servo for testing coal sample gas adsorption adsorption law according to claim 1 measures pilot system, it is characterised in that: electric control gear adopts computer or single-chip microcomputer or PLC or integrated circuit。
CN201620077824.3U 2016-01-26 2016-01-26 A servo measurement testing system for testing coal sample gas absorption desorption rule Withdrawn - After Issue CN205333462U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105547907A (en) * 2016-01-26 2016-05-04 河南理工大学 Servo measuring testing system and method for coal sample gas adsorption and desorption
CN106290777A (en) * 2016-07-29 2017-01-04 河南理工大学 A kind of coal-bed flooding Reasonable Injection water method for determination of amount
CN106644821A (en) * 2016-12-31 2017-05-10 山东大学 Testing apparatus and method for accurately measuring initial gas expansion energy

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105547907A (en) * 2016-01-26 2016-05-04 河南理工大学 Servo measuring testing system and method for coal sample gas adsorption and desorption
CN105547907B (en) * 2016-01-26 2018-04-13 河南理工大学 The servo measurement pilot system and method for coal sample gas adsorption desorption
CN106290777A (en) * 2016-07-29 2017-01-04 河南理工大学 A kind of coal-bed flooding Reasonable Injection water method for determination of amount
CN106644821A (en) * 2016-12-31 2017-05-10 山东大学 Testing apparatus and method for accurately measuring initial gas expansion energy
CN106644821B (en) * 2016-12-31 2019-12-06 山东大学 Test instrument and method for accurately measuring initial gas expansion energy

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