CN208076323U - It is a kind of to sentence the system for knowing gas adsorption desorption advantage field strength - Google Patents
It is a kind of to sentence the system for knowing gas adsorption desorption advantage field strength Download PDFInfo
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- CN208076323U CN208076323U CN201820618729.9U CN201820618729U CN208076323U CN 208076323 U CN208076323 U CN 208076323U CN 201820618729 U CN201820618729 U CN 201820618729U CN 208076323 U CN208076323 U CN 208076323U
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- 238000002336 sorption--desorption measurement Methods 0.000 title claims abstract description 8
- 239000003245 coal Substances 0.000 claims abstract description 73
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000001179 sorption measurement Methods 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 21
- 238000003795 desorption Methods 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims 1
- 230000005684 electric field Effects 0.000 abstract description 16
- 238000002474 experimental method Methods 0.000 abstract description 5
- 238000005065 mining Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 17
- 238000004458 analytical method Methods 0.000 description 8
- 238000000605 extraction Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
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Abstract
It is a kind of sentence know gas adsorption desorption advantage field strength system, the system comprises methane tank, valve, pressure gauge, pressure regulator valve, with reference to cylinder, vacuum pump, clamper, high voltage power supply, constant water bath box, flow sensor, gas collection case, computer and gas drainage arrangement；Clamper includes cylinder, and coal sample cylinder is set in cylinder；Meanwhile the both ends of coal sample cylinder set left and right electrode plate, left and right electrode plate is separately connected the positive and negative electrode of high voltage power supply；Methane tank connects the gas access of clamper；Platoon feed channel on the gas vent of clamper, discharge duct end connect gas collection case；Gas drainage arrangement includes the first, second graduated cylinder；First graduated cylinder connects clamper gas vent, and the first graduated cylinder connects the second graduated cylinder.System described in the utility model finds the advantage field strength for improving gas pumping rate by additional different electric field measurement gas adsorptions, parsing to obtain the rule of gas adsorption parsing, and strong experiment support is provided for seam mining.
Description
Technical Field
The utility model belongs to plus electric field strengthening coal seam gas drainage rate category especially relates to a system of distinguishing gas adsorption and desorption dominant field intensity.
Background
Coal and gas outburst is the biggest threat of current mine safety production, and gas is the main cause of the accident, so improving the gas extraction rate has great significance to preventing coal and gas accidents.
The average extraction rate of coal bed gas in China is low, the desorption and seepage properties are poor, and an extraction method capable of remarkably improving the coal bed gas is not found.
At present, methods for improving gas desorption seepage of coal seams comprise three types, the first type belongs to mechanical methods such as hydraulic and blasting fracturing, drilling and slotting pressure relief, exploitation of a liberation layer and the like, the second type is a method of gas injection displacement, water injection displacement and the like, the third type is a method of additionally adding a temperature field, a microwave field, a sound field and the like, and from the practical application effect of the methods, because coal seam occurrence conditions of various mines are different, some methods cannot be popularized and applied in a plurality of mine areas, and other new technical methods and theories are urgently sought.
The external direct current electric field accelerates the gas desorption rate, the coal body pore crack structure can be changed under the action of the external electric field, the potential energy of the action of coal and gas molecules is reduced, the attraction between the coal and the gas molecules is enhanced, and the final result is that the gas desorption is accelerated and the gas desorption amount is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a convenient to use, the system of discerning gas adsorption desorption advantage field intensity that excellent in use effect can study gas adsorption desorption law, seeks the advantage field intensity that improves gas drainage rate.
In order to solve the technical problem, the utility model provides a following technical scheme: a system for judging gas adsorption and desorption dominant field intensity comprises a methane tank, a valve, a pressure gauge, a pressure regulating valve, a reference cylinder, a vacuum pump, a clamp holder, a high-voltage power supply, a constant-temperature water bath tank, a flow sensor, a gas collecting tank, a computer and a gas drainage device, wherein the clamp holder is arranged in the constant-temperature water bath tank;
the holder comprises a cylinder body, a coal sample cylinder is arranged in the cylinder body, and a gas inlet and a gas outlet are communicated with the coal sample cylinder; meanwhile, a left electrode plate and a right electrode plate are respectively arranged at two ends of the coal sample cylinder, and the left electrode plate and the right electrode plate are respectively connected with the positive electrode and the negative electrode of a high-voltage power supply;
the methane tank is connected with the gas inlet of the holder through a vent pipe, and the vent pipe is provided with a valve, a pressure gauge and a pressure regulating valve;
the reference cylinder is connected to the vent pipeline;
the vacuum pump is also connected with the gas inlet of the holder through a vent pipeline;
the gas outlet of the holder is connected with an exhaust pipeline, the tail end of the exhaust pipeline is connected with a gas collecting box through a gas valve, a flow sensor is arranged on the exhaust pipeline, and the flow sensor transmits collected flow information to a computer;
the air drainage device comprises a first measuring cylinder and a second measuring cylinder with an opening at the top, wherein a plug is arranged at the top of the first measuring cylinder, and water is filled in the first measuring cylinder; the first measuring cylinder is connected with the gas outlet of the holder through an exhaust valve, and the first measuring cylinder is connected with the second measuring cylinder through a drain pipe.
The two ends of the cylinder are respectively provided with a left nut and a right nut; a rubber sealing sleeve is arranged in the cylinder body; the left nut is connected with an installation cover through threads, a left pressure head is arranged in the installation cover in a sealing mode, and a left installation seat is arranged between the left pressure head and the left nut; the right nut is externally connected with the piston cylinder through threads, the piston cylinder is externally fixed with the oil cylinder cover through screws, a hollow piston is arranged in the piston cylinder, the hollow piston penetrates through the oil cylinder cover and is in sliding sealing fit with the oil cylinder cover, and a right mounting seat is arranged between the hollow piston and the right nut.
The left end and the right end of the rubber sealing sleeve are respectively sleeved on the left mounting seat and the right mounting seat, a left plug, a left electrode plate, a coal sample cylinder, a right electrode plate, a right plug and a right pressure head are sequentially arranged in the rubber sealing sleeve and between the left pressure head and the hollow piston from left to right, the axial centers of the left pressure head, the left plug, the left electrode plate, the right plug and the right pressure head are provided with central air vents, a gas inlet is formed in the through hole of the left pressure head, and a gas outlet is formed in the through hole of the right pressure head; the left pressing head and the left plug are correspondingly provided with a left wiring groove, the right plug and the right pressing head are correspondingly provided with a right wiring groove, and a left electrode plate and a right electrode plate which are connected with a wire are respectively arranged in the left wiring groove and the right wiring groove.
The confining pressure interface is arranged on the left screw cap and is communicated with a confining pressure cavity enclosed among the left screw cap, the cylinder, the right screw cap, the right mounting seat, the rubber sealing sleeve and the left mounting seat; the axial compression interface is communicated with an axial compression cavity enclosed among the piston cylinder, the oil cylinder cover and the hollow piston.
The left mounting seat and the right mounting seat are of wedge-shaped structures, and ○ -shaped sealing rings are respectively arranged on the contact surface of the left mounting seat and the left nut and the contact surface of the right mounting seat and the right nut.
The left plug and the right plug are made of insulating materials, the left electrode plate is fixedly installed on the left plug, and the right electrode plate is fixedly installed on the right plug.
The cylinder body and the coal sample cylinder are made of PPEK insulating materials; the left electrode plate and the right electrode plate are copper metal plates; the coal sample cylinder is a cylinder body with the inner diameter of 5cm and the length of 10 cm.
Through the technical scheme, the beneficial effects of the utility model are that: better simulation actual application condition of system, through applying the electric field for gas desorption speed accelerates, increases gas desorption volume simultaneously, has important guiding meaning to the coal seam exploitation, can guarantee the safety of coal seam exploitation in-process to a very big degree.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a gripper configuration;
FIG. 3 is a graph showing the variation of the analytical values of the coal samples in the ancient Han mountains under different electric fields;
FIG. 4 is a graph showing the variation of the coal sample analysis amount of crane wall under different electric fields;
FIG. 5 is a graph showing the variation of the analytical values of flat-topped mountain coal samples in different electric fields;
FIG. 6 is a graph showing the variation of the analytic amount of the coal sample of the artificial horse under different electric fields.
Detailed Description
A system for judging gas adsorption and desorption dominant field intensity comprises a methane tank 1, a valve 2, a pressure gauge 3, a pressure regulating valve 4, a reference cylinder 5, a vacuum pump 6, a clamp 7, a high-voltage power supply 8, a constant-temperature water bath tank 9, a flow sensor 10, a gas collecting tank 11, a computer 12 and a gas drainage device, wherein the clamp 7 is arranged in the constant-temperature water bath tank 9, so that the coal sample in the clamp 7 is ensured to keep constant temperature, and the stability and reliability of a measuring process are ensured.
The holder 7 comprises a cylinder 21, a coal sample cylinder 20 is arranged in the cylinder 21, and a gas inlet 15 and a gas outlet 22 are communicated with the coal sample cylinder 20; meanwhile, a left electrode plate 18 and a right electrode plate are respectively arranged at two ends of the coal sample cylinder 20. The positive electrode and the negative electrode of the high-voltage power supply 8 are respectively connected with the left electrode plate 18 and the right electrode plate through electrode wires 17, so that an electric field is applied to two ends of the coal sample cylinder 20, and the analysis amount of coal sample gas is increased through the electric field.
The cylinder body 21 and the coal sample cylinder 20 are made of PPEK insulating materials; the left electrode plate 18 and the right electrode plate are copper metal plates; the coal sample cylinder 20 is a cylinder 21 having an inner diameter of 5cm and a length of 10 cm.
The methane tank 1 is connected with a gas inlet 15 of the holder 7 through an air duct, and a valve 2, a pressure gauge 3 and a pressure regulating valve 4 are arranged on the air duct. When the methane tank is used, the methane tank 1 is opened as required, so that the methane tank 1 leads gas into the clamp 7 through the vent pipeline, enters the coal sample of the coal sample cylinder 20 in the clamp 7, and is adsorbed by the coal sample.
The pressure gauge 3 can read the pressure of the gas introduced into the holder 7 in real time, the pressure of the gas entering the holder 7 can be adjusted through the pressure regulating valve 4, and the valve 2 can control whether the vent pipe is communicated or not.
The reference cylinder 5 is also connected to a vent line, while the vacuum pump 6 is also connected to the gas inlet 15 of the holder 7 via the vent line. The vacuum pump 6 can vacuumize the coal sample cylinder 20 of the clamping device 7, and the use is convenient.
An exhaust pipeline is connected to the gas outlet 22 of the clamp 7, the tail end of the exhaust pipeline is connected with the gas collecting box 11 through a gas valve, meanwhile, a flow sensor 10 is arranged on the exhaust pipeline, and the flow sensor 10 transmits collected flow information to the computer 12.
The air drainage device comprises a first measuring cylinder 13 and a second measuring cylinder 14 with an opening at the top, a plug is arranged at the top of the first measuring cylinder 13, and water is filled in the first measuring cylinder 13; the first measuring cylinder 13 is connected with the gas outlet 22 of the clamper 7 through a gas exhaust valve, and the first measuring cylinder 13 is connected with the second measuring cylinder 14 through a water drainage pipe.
For the purpose of use, the structure of the gripper 7 is described in detail below:
a left nut and a right nut are respectively arranged at the two ends of the cylinder body 21;
a rubber sealing sleeve 19 is arranged in the cylinder body 21; the outer side of the left nut is connected with an installation cover through threads, a left pressure head is arranged in the installation cover in a sealing mode, and a left installation seat is arranged between the left pressure head and the left nut; the right nut is externally connected with the piston cylinder through threads, the piston cylinder is externally fixed with the oil cylinder cover through screws, a hollow piston is arranged in the piston cylinder, the hollow piston penetrates through the oil cylinder cover and is in sliding sealing fit with the oil cylinder cover, and a right mounting seat is arranged between the hollow piston and the right nut.
The left end and the right end of the rubber sealing sleeve 19 are respectively sleeved on the left mounting seat and the right mounting seat, the left mounting seat and the right mounting seat are of wedge-shaped structures, and ○ -shaped sealing rings 16 are respectively arranged on the contact surface of the left mounting seat and the left screw cap and the contact surface of the right mounting seat and the right screw cap.
A left plug, a left electrode plate 18, a coal sample cylinder 20, a right electrode plate, a right plug 23 and a right pressure head are sequentially arranged in the rubber sealing sleeve 19 from left to right between the left pressure head and the hollow piston, a central air vent is arranged at the axial centers of the left pressure head, the left plug, the left electrode plate 18, the right electrode plate, the right plug 23 and the right pressure head, wherein a gas inlet 15 is arranged at a through hole of the left pressure head, and a gas outlet 22 is arranged at a through hole of the right pressure head; the left pressing head and the left plug are correspondingly provided with a left wiring groove, the right plug 23 and the right pressing head are correspondingly provided with a right wiring groove, and a left electrode plate 18 and a right electrode plate which are connected with a lead are respectively arranged in the left wiring groove and the right wiring groove.
The left plug and the right plug 23 are made of insulating materials, the left electrode plate 18 is fixedly installed on the left plug, and the right electrode plate is fixedly installed on the right plug 23.
The method for judging the gas adsorption and desorption dominant field intensity by using the system sequentially comprises the following steps of:
(1) and (3) putting the coal sample to be tested into a constant temperature oven to be dried for 2h, taking out the coal sample, sealing and storing the coal sample in a sealed manner so as to remove the moisture in the coal sample and reduce the influence of residual moisture in the coal sample on the experimental result.
(2) Checking the air tightness of the system, and vacuumizing the reference cylinder and the clamp holder when the air tightness of the system is intact.
(3) And (3) loading the coal sample to be detected into the coal sample cylinder of the clamp holder, filling the coal sample cylinder of the clamp holder as much as possible, and performing vacuum degassing on the clamp holder until the system pressure value is 10 Pa.
(4) Turning on a high-voltage power supply and adjusting voltage; in this step, the voltage is adjusted as follows: ensuring that the field strengths between the left electrode plate and the right electrode plate are respectively 400V/cm, 1200V/cm and 2400V/cm, and if power is applied in the adsorption process, the power-on time is 12 h; if power is applied in the resolving process, the power-on time is 12 h.
(5) And (3) opening the constant-temperature water bath box to ensure that the temperature in the constant-temperature water bath box is 30 ℃ until the experiment is finished, ensuring the constant temperature of the coal sample in the coal sample cylinder of the clamp holder in the experiment process, and reducing the influence of the temperature on the experiment result.
(6) Judging whether the adsorption is powered on, if so, performing the step (7), and if not, performing the step (8);
(7) adding the high-voltage power supply in the step (4) between the left electrode plate and the right electrode plate, opening a valve, filling gas into the coal sample cylinder, and stopping when a pressure gauge displays a preset gas pressure P1, wherein P1 is 1 Mpa; and (5) standing for 12-24h, and after the coal adsorbs the gas stably, fully adsorbing the gas in the holder to reach balance, and performing the step (9). Since the electric field strength in step (4) is 400V/cm, 1200V/cm and 2400V/cm, respectively, this step needs to be performed 3 times, with 3 field strengths selected as needed.
(8) Opening a valve, filling gas into the coal sample cylinder, and stopping when a pressure gauge displays a preset gas pressure P1, wherein P1 is 1 Mpa; and (5) standing for 12-24h, and after the coal adsorbs the gas stably, fully adsorbing the gas in the holder to reach balance, and performing the step (9).
(9) And reading scale values of the first measuring cylinder and the second measuring cylinder, and recording the atmospheric pressure and the indoor temperature.
(10) And (4) judging whether the analysis is powered on, if so, performing the step (11), and if not, performing the step (12).
(11) Adding the high-voltage power supply in the step (4) between the left electrode plate and the right electrode plate, opening a valve of a gas outlet of the holder and an exhaust valve connected between the gas outlet of the holder and the first measuring cylinder, allowing gas in the holder to enter the first measuring cylinder, and discharging water in the first measuring cylinder into the second measuring cylinder; after the pressure in the clamp returns to zero, the exhaust valve is closed, the gas valve is opened, and the residual gas in the exhaust pipeline enters the gas collecting box through the flow sensor. Since the electric field strength in step (4) is 400V/cm, 1200V/cm and 2400V/cm, respectively, this step needs to be performed 3 times, with 3 field strengths selected as needed.
(12) Opening a valve at a gas outlet of the holder and an exhaust valve connected between the gas outlet of the holder and the first measuring cylinder, wherein gas in the holder enters the first measuring cylinder, and water in the first measuring cylinder is discharged into the second measuring cylinder; after the pressure in the clamp returns to zero, the exhaust valve is closed, the gas valve is opened, and the residual gas in the exhaust pipeline enters the gas collecting box through the flow sensor.
(13) Calculating the remaining volume of the holder; wherein the remaining volume of the holderV R The calculation method comprises the following steps:
firstly, the true relative density of the coal sample is measuredr TRD ；
Then, the volume of the pure coal is calculated according to the formula (1)V C Calculating the residual volume of the holder, namely the volume of the gas adsorbed by the coal pillar according to the formula (2)V R ；
Then, the volume of the gas absorbed by the coal pillar under normal pressure is calculated according to the formula (3) and the formula (4)V P ；
（1）
（2）
（3）
（4）
In the formula:V c is the volume of the coal sample in cm3；r TRD Is the true relative density of the coal sample in cm3/g；mThe mass of the coal sample is g;V R the volume of the gas absorbed by the coal sample is cm3；V S Volume of coal sample cylinder as holder in cm3；P 0 Is standard atmospheric pressure in Pa;P 1 is the pressure in the cavity in Pa;P V is the axial pressure in Pa;P z is the confining pressure in Pa.
(14) Calculating the analysis amount, wherein the calculation formula of the analysis amount is as follows:
；
wherein,Jcis the analytic amount;V 1 is large in volume of the measuring cylinder,V 2 Is small in volume of the measuring cylinder,V 3 Is the volume of the system pipeline,V 4 For reference cylinder volume,V R Is the remaining volume of the holder;
(15) converting the analyzed amount into the total gas desorption amount in a standard state; the conversion method comprises the following steps:
wherein:
V 0 total gas desorption in cm under standard conditions3；
V-step (14) of measuring the amount of desorbed gasJcIn units of cm3；
t w Measuring the temperature of the water in the tube in DEG C
P a -atmospheric pressure in Pa;
h w -the height of the water column in the second graduated cylinder in mm when reading the data.
During the course of the experiment, the selected coal samples were: in the experimental process, electric fields of 400V/cm, 1200V/cm and 2400V/cm are respectively added to the 4 coal samples in the adsorption and analysis processes in the experimental process, as shown in figures 3-6, wherein the dominant field intensity of the anthracite in the ancient Han mountain is 400V/cm, the dominant field intensity of the poor lean coal on the crane wall is 400V/cm, the dominant field intensity of the fat coal on the flat top is 1200V/cm, and the dominant field intensity of the lignite in the artificial horse is 1200V/cm, so that the experimental result has a guiding significance for actual mining.
Better simulation actual application condition of system, through applying the electric field for gas desorption speed accelerates, increases gas desorption volume simultaneously, has important guiding meaning to the coal seam exploitation, can guarantee the safety of coal seam exploitation in-process to a very big degree. The gas adsorption and analysis are measured by adding different electric fields, so that the rule of gas adsorption and analysis is obtained, the dominant field intensity for improving the gas extraction rate is found, and powerful experimental support is provided for coal seam mining.
Claims (7)
1. The utility model provides a judge system of distinguishing gas absorption desorption dominant field intensity which characterized in that: the system comprises a methane tank, a valve, a pressure gauge, a pressure regulating valve, a reference cylinder, a vacuum pump, a clamp, a high-voltage power supply, a constant-temperature water bath box, a flow sensor, a gas collecting box, a computer and a gas drainage device, wherein the clamp is arranged in the constant-temperature water bath box;
the holder comprises a cylinder body, a coal sample cylinder is arranged in the cylinder body, and a gas inlet and a gas outlet are communicated with the coal sample cylinder; meanwhile, a left electrode plate and a right electrode plate are respectively arranged at two ends of the coal sample cylinder, and the left electrode plate and the right electrode plate are respectively connected with the positive electrode and the negative electrode of a high-voltage power supply;
the methane tank is connected with the gas inlet of the holder through a vent pipe, and the vent pipe is provided with a valve, a pressure gauge and a pressure regulating valve;
the reference cylinder is connected to the vent pipeline;
the vacuum pump is also connected with the gas inlet of the holder through a vent pipeline;
the gas outlet of the holder is connected with an exhaust pipeline, the tail end of the exhaust pipeline is connected with a gas collecting box through a gas valve, a flow sensor is arranged on the exhaust pipeline, and the flow sensor transmits collected flow information to a computer;
the air drainage device comprises a first measuring cylinder and a second measuring cylinder with an opening at the top, wherein a plug is arranged at the top of the first measuring cylinder, and water is filled in the first measuring cylinder; the first measuring cylinder is connected with the gas outlet of the holder through an exhaust valve, and the first measuring cylinder is connected with the second measuring cylinder through a drain pipe.
2. The system for judging the gas adsorption and desorption dominant field strength according to claim 1, wherein: the two ends of the cylinder are respectively provided with a left nut and a right nut; a rubber sealing sleeve is arranged in the cylinder body; the left nut is connected with an installation cover through threads, a left pressure head is arranged in the installation cover in a sealing mode, and a left installation seat is arranged between the left pressure head and the left nut; the right nut is externally connected with the piston cylinder through threads, the piston cylinder is externally fixed with the oil cylinder cover through screws, a hollow piston is arranged in the piston cylinder, the hollow piston penetrates through the oil cylinder cover and is in sliding sealing fit with the oil cylinder cover, and a right mounting seat is arranged between the hollow piston and the right nut.
3. The system for judging gas adsorption/desorption dominant field strength according to claim 2, wherein: the left end and the right end of the rubber sealing sleeve are respectively sleeved on the left mounting seat and the right mounting seat, a left plug, a left electrode plate, a coal sample cylinder, a right electrode plate, a right plug and a right pressure head are sequentially arranged in the rubber sealing sleeve and between the left pressure head and the hollow piston from left to right, the axial centers of the left pressure head, the left plug, the left electrode plate, the right plug and the right pressure head are provided with central air vents, a gas inlet is formed in the through hole of the left pressure head, and a gas outlet is formed in the through hole of the right pressure head; the left pressing head and the left plug are correspondingly provided with a left wiring groove, the right plug and the right pressing head are correspondingly provided with a right wiring groove, and a left electrode plate and a right electrode plate which are connected with a wire are respectively arranged in the left wiring groove and the right wiring groove.
4. The system for judging gas adsorption/desorption dominant field strength according to claim 3, wherein: the confining pressure interface is arranged on the left screw cap and is communicated with a confining pressure cavity enclosed among the left screw cap, the cylinder, the right screw cap, the right mounting seat, the rubber sealing sleeve and the left mounting seat; the axial compression interface is communicated with an axial compression cavity enclosed among the piston cylinder, the oil cylinder cover and the hollow piston.
5. The system for judging the gas adsorption and desorption dominant field strength according to claim 4, wherein the left mounting seat and the right mounting seat are of wedge-shaped structures, and ○ -shaped sealing rings are respectively arranged on the contact surface of the left mounting seat and the left screw cap and the contact surface of the right mounting seat and the right screw cap.
6. The system for judging gas adsorption/desorption dominant field strength according to claim 5, wherein: the left plug and the right plug are made of insulating materials, the left electrode plate is fixedly installed on the left plug, and the right electrode plate is fixedly installed on the right plug.
7. The system for judging the gas adsorption/desorption dominant field strength according to any one of claims 1 to 6, wherein: the cylinder body and the coal sample cylinder are made of PPEK insulating materials; the left electrode plate and the right electrode plate are copper metal plates; the coal sample cylinder is a cylinder body with the inner diameter of 5cm and the length of 10 cm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820618729.9U CN208076323U (en) | 2018-04-27 | 2018-04-27 | It is a kind of to sentence the system for knowing gas adsorption desorption advantage field strength |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820618729.9U CN208076323U (en) | 2018-04-27 | 2018-04-27 | It is a kind of to sentence the system for knowing gas adsorption desorption advantage field strength |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593492A (en) * | 2018-04-27 | 2018-09-28 | 河南理工大学 | It is a kind of to sentence the system and method for knowing gas adsorption desorption advantage field strength |
| CN109342264A (en) * | 2018-12-06 | 2019-02-15 | 燕山大学 | A kind of coal bed gas and shale Gas content desorption measuring device and method |
| CN110160939A (en) * | 2019-07-04 | 2019-08-23 | 贵州大学 | A kind of three axis seepage apparatus and operating method changing mixed gas electric field and humidity |
-
2018
- 2018-04-27 CN CN201820618729.9U patent/CN208076323U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593492A (en) * | 2018-04-27 | 2018-09-28 | 河南理工大学 | It is a kind of to sentence the system and method for knowing gas adsorption desorption advantage field strength |
| CN109342264A (en) * | 2018-12-06 | 2019-02-15 | 燕山大学 | A kind of coal bed gas and shale Gas content desorption measuring device and method |
| CN110160939A (en) * | 2019-07-04 | 2019-08-23 | 贵州大学 | A kind of three axis seepage apparatus and operating method changing mixed gas electric field and humidity |
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