CN113281234B - Coal dust gas diffusion seepage flow measuring device - Google Patents
Coal dust gas diffusion seepage flow measuring device Download PDFInfo
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- CN113281234B CN113281234B CN202110528943.1A CN202110528943A CN113281234B CN 113281234 B CN113281234 B CN 113281234B CN 202110528943 A CN202110528943 A CN 202110528943A CN 113281234 B CN113281234 B CN 113281234B
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- 238000009792 diffusion process Methods 0.000 title claims abstract description 49
- 239000002817 coal dust Substances 0.000 title claims abstract description 29
- 238000005553 drilling Methods 0.000 claims abstract description 95
- 238000005259 measurement Methods 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 26
- 238000002347 injection Methods 0.000 claims description 22
- 239000007924 injection Substances 0.000 claims description 22
- 230000010355 oscillation Effects 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 4
- 238000005056 compaction Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims 1
- 238000000605 extraction Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Chemical & Material Sciences (AREA)
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a coal dust gas diffusion and seepage measurement device, which relates to the technical field of gas diffusion and seepage measurement and comprises a constant temperature box, a basic tank, a first comparison tank, a second comparison tank, a vacuumizing assembly and a gas supply assembly, wherein the basic tank, the first comparison tank and the second comparison tank are fixedly arranged in the constant temperature box and are respectively connected with a suction end of the vacuumizing assembly and a supply end of the gas supply assembly; the first comparison tank can simulate the influence of a drilling machine on gas diffusion seepage when the drilling machine directly drills; and the second comparison tank can simulate the influence of surrounding drilling machines on gas diffusion seepage when drilling.
Description
Technical Field
The invention relates to the technical field of gas diffusion and seepage measurement, in particular to a coal dust gas diffusion and seepage measurement device.
Background
In order to reduce the occurrence of gas disaster accidents, the gas content and the gas diffusion and seepage situation need to be predicted in advance, so that the strain capacity can be improved by mastering the coal dust gas diffusion and seepage rule, and the danger of coal and gas outburst can also be predicted in advance.
Therefore, it is necessary to provide a coal dust gas diffusion and seepage measurement device to solve the above-mentioned problems in the background art.
Disclosure of Invention
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a coal dust gas diffusion seepage flow survey device which characterized in that: the device comprises a constant temperature box, a basic tank, a first comparison tank, a second comparison tank, a vacuumizing assembly and a gas supply assembly, wherein the basic tank, the first comparison tank and the second comparison tank are fixedly arranged in the constant temperature box and are respectively connected with a suction end of the vacuumizing assembly and a supply end of the gas supply assembly;
the first comparison tank can simulate the influence of a drilling machine on gas diffusion seepage when the drilling machine directly drills;
and the second comparison tank can simulate the influence of surrounding drilling machines on gas diffusion seepage when drilling.
Further, as an preference, the first comparison tank and the second comparison tank both comprise a basic tank, the basic tank comprises a tank body, an upper spiral cover, a lower spiral cover, a bottom plate and a compacting plate, wherein the upper end and the lower end of the tank body are respectively connected with the upper spiral cover and the lower spiral cover in a threaded manner;
the inner side of the lower part of the tank body is sealed and blocked with a bottom plate for bearing coal dust, the upper spiral cover is fixedly provided with a guide plate, the guide plate is in threaded connection with the middle part of the control shaft, the two ends of the control shaft are polished rods, the upper polished rod is connected with the handle by sliding through the upper spiral cover in a sealing manner, and the lower polished rod is connected with the compacting plate so as to provide initial pressure for the coal dust by controlling the position height of the compacting plate;
and the compaction plate is a grid plate with a hole body.
Further, as the preference, contrast jar one still includes vertical drilling head, vertical rig and sealed righting board one, wherein, sealed vertical slip of vertical drilling head passes the bottom plate on its corresponding jar body, just the initial position of vertical drilling head flushes with this bottom plate upper surface, the bottom of vertical drilling head links to each other with the vertical drill shaft coaxial of vertical rig, just the diameter of vertical drilling head is the same with vertical drill shaft diameter, sealed slip of vertical drill shaft passes sealed righting board one, sealed righting board one is arranged in the lower spiral cover on its corresponding jar body.
Further, as an preference, the first comparison tank further comprises a transverse drilling head, a transverse drilling machine and a second sealing and righting plate, wherein the transverse drilling head is sealed to transversely slide through the corresponding tank body, the initial position of the transverse drilling head is flush with the inner wall of the tank body, the other end of the transverse drilling head is coaxially connected with a transverse drilling shaft of the transverse drilling machine, the diameter of the transverse drilling head is the same as that of the transverse drilling shaft, the transverse drilling shaft is sealed to transversely slide through the second sealing and righting plate, and the second sealing and righting plate is positioned on the outer side of the corresponding pipe body.
Further, preferably, the second control tank further includes a lateral oscillation spring and a lateral oscillator, wherein one end of the plurality of lateral oscillation springs is connected to a corresponding tank side surface, and the other end of the plurality of lateral oscillation springs is connected to an output end of the lateral oscillator, and the lateral oscillator is a linear oscillator.
Further, as an preference, the second control tank further includes a vertical oscillation spring and a vertical oscillator, wherein one end of the plurality of vertical oscillation springs is connected to the bottom surface of the corresponding tank body, the other end is connected to the output end of the vertical oscillator, and the vertical oscillator is a linear oscillator.
Further, as the preference, the evacuation subassembly includes the bleeder subassembly, air extraction manifold and vacuum pump, wherein, the one end of bleeder subassembly is linked together with the bottom of basic jar, and the intercommunication department is located the top of bottom plate, and the other end communicates to on the air extraction manifold, the air extraction manifold is linked together with the suction end of vacuum pump, still be provided with manometer two on the air extraction manifold, still be provided with valve one on the bleeder subassembly.
Further, as an preference, the gas supply assembly includes gas injection branch pipe, gas injection house steward and gas tank, wherein, the one end of gas injection branch pipe is linked together with the top of basic jar, and the other end is linked together to the gas injection house steward, the gas injection house steward is linked together with the gas tank, still be provided with valve two on the gas injection branch pipe.
Further, as the preference, still be provided with the layering support body in the basic jar, the layering support body is including the standing groove that has the upper shed, place coal dust and layering net in proper order in the standing groove, and the layering net of bottommost is direct to contact with the tank bottom of standing groove, the mesh of layering net is less than the particle diameter of coal dust, and can make the coal dust in the layering support body has horizontal layering trend, is located the below and the left side correspondence of the standing groove in the contrast jar and has seted up the through-hole.
Further, as the preference, still include measuring device, measuring device sets up on basic jar, measuring device includes diffusion seepage pipe, manometer three and flow measurement table, diffusion seepage pipe's one end is linked together with the top of basic jar, and the other end is the opening, still set gradually manometer three, valve three and flow measurement table on the diffusion seepage pipe.
Compared with the prior art, the invention provides a coal dust gas diffusion and seepage measuring device, which has the following beneficial effects:
in the device, the first comparison tank can simulate the influence of a drilling machine on gas diffusion seepage when the drilling machine directly drills; when the vertical drilling machine drills, the influence of drilling perpendicular to the trend of the distribution layer on gas diffusion seepage can be simulated, and when the horizontal drilling machine drills, the influence of drilling parallel to the trend of the distribution layer on gas diffusion seepage can be simulated;
in addition, the second comparison tank can simulate the influence on gas diffusion seepage when the surrounding drilling machine drills, can conduct the same-direction comparison with the first comparison tank, and in addition, the foundation tank, the first comparison tank and the second comparison tank can also realize the multi-direction comparison measurement, so that the method has better guiding significance on actual operation.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the internal structure of the incubator according to the present invention;
FIG. 3 is a schematic view of the basic tank structure of the present invention;
FIG. 4 is a schematic diagram of a control tank I according to the present invention;
FIG. 5 is a schematic view of a layered frame according to the present invention;
in the figure: 1. a constant temperature box; 2. a base tank; 3. a first comparison tank; 4. a second comparison tank; 5. air extraction and separation; 6. an air extraction main pipe; 7. a vacuum pump; 8. gas injection branch pipes; 9. a gas injection main pipe; 10. a gas tank; 11. a first pressure gauge; 12. a second pressure gauge; 13. a diffusion seepage pipe; 14. a third pressure gauge; 15. a flow meter; 16. a placement groove; 17. a layered grid; 21. a tank body; 22. an upper screw cap; 23. a lower rotary cover; 24. a bottom plate; 25. a compacting plate; 26. a control shaft; 27. a guide plate; 31. a vertical drill bit; 32. a vertical drilling machine; 33. sealing the first righting plate; 34. a lateral drilling head; 35. a transverse drilling machine; 36. sealing the second righting plate; 41. a transverse oscillating spring; 42. a lateral oscillator; 43. a vertical oscillating spring; 44. a vertical oscillator.
Detailed Description
Referring to fig. 1 to 5, in an embodiment of the present invention, a coal dust gas diffusion and seepage measurement device is characterized in that: the device comprises a constant temperature box 1, a basic tank 2, a first comparison tank 3, a second comparison tank 4, a vacuumizing assembly and a gas supply assembly, wherein the basic tank 2, the first comparison tank 3 and the second comparison tank 4 are fixedly arranged in the constant temperature box 1 and are respectively connected with a suction end of the vacuumizing assembly and a supply end of the gas supply assembly;
the first comparison tank 3 can simulate the influence of a drilling machine on gas diffusion seepage when the drilling machine directly drills;
the second comparison tank 4 can simulate the influence on gas diffusion and seepage when a surrounding drilling machine drills, so that multidirectional comparison measurement is realized, and the method has better guiding significance on actual operation.
In this embodiment, the first control tank 3 and the second control tank 4 each include a base tank 2, that is, the first control tank 3 and the second control tank 4 each have all structures of the base tank 2, and have partial structures correspondingly added on the basis of the base tank 2, and the base tank 2 includes a tank body 21, an upper screw cap 22, a lower screw cap 23, a bottom plate 24, and a compacting plate 25, where the upper and lower ends of the tank body 21 are respectively screwed with the upper screw cap 22 and the lower screw cap 23;
a bottom plate 24 for bearing coal dust is clamped on the inner side of the lower part of the tank body 21 in a sealing manner, a guide plate 27 is fixed on the upper spiral cover 22, the guide plate 27 is in threaded connection with the middle part of the control shaft 26, two ends of the control shaft 26 are polished rods, the upper polished rod passes through the upper spiral cover 22 in a sealing manner and is connected with a handle, the lower polished rod is connected with a compacting plate 25, and initial pressure is provided for the coal dust by controlling the position height of the compacting plate 25;
the hold-down plate 25 is a mesh plate having a hole, so that the hold-down plate 25 does not hinder the injection when gas is injected into the base tank 2 by the gas supply unit.
In this embodiment, as shown in fig. 3, the first comparison tank 3 further includes a first vertical drilling head 31, a first vertical drilling machine 32 and a first sealing and correcting plate 33, where the first vertical drilling head 31 is sealed and vertically slid through the bottom plate 24 on the tank body 21 corresponding to the first vertical drilling head 31, and the initial position of the first vertical drilling head 31 is flush with the upper surface of the bottom plate 24, the bottom of the first vertical drilling head 31 is coaxially connected with the vertical drilling shaft of the first vertical drilling machine 32, the diameter of the first vertical drilling head 31 is the same as the diameter of the vertical drilling shaft, the first vertical drilling shaft is sealed and slid through the first sealing and correcting plate 33, the first sealing and correcting plate 33 is located in the lower rotary cover 23 on the tank body 21 corresponding to the first sealing and correcting plate, during implementation, the first sealing and correcting plate 32 can drive the first vertical drilling head 31 in the vertical direction, and the base tank 2 is further provided with a layered frame body, the grid layered frame body includes a placing groove 16 with an upper opening, coal dust and layered chips are sequentially and alternately placed in the placing groove 16, and the layered frame body is in the bottom of the placing groove 16 and is in direct contact with the bottom of the placing groove 16, and the layered chip is located in the layer of the corresponding to the horizontal direction of the layer, and the layered frame is located in the horizontal direction and has a vertical direction and is located in the layer 3.
In addition, the first comparison tank 3 further comprises a transverse drilling head 34, a transverse drilling machine 35 and a second sealing and correcting plate 36, wherein the transverse drilling head 34 is sealed and transversely slides through the corresponding tank body 21, the initial position of the transverse drilling head 34 is flush with the inner wall of the tank body 21, the other end of the transverse drilling head 34 is coaxially connected with a transverse drilling shaft of the transverse drilling machine 35, the diameter of the transverse drilling head 34 is the same as that of the transverse drilling shaft, the transverse drilling shaft is sealed and slidingly passes through the second sealing and correcting plate 36, and the second sealing and correcting plate 36 is positioned on the outer side of the corresponding pipe body 21, so that drilling conditions parallel to the trend of a distribution layer can be simulated during drilling.
In this embodiment, as shown in fig. 2, the second comparison tank further includes a transverse oscillation spring 41 and a transverse oscillator 42, where one end of the transverse oscillation springs 41 is connected to the corresponding side surface of the tank body 21, and the other end is connected to the output end of the transverse oscillator 42, and the transverse oscillator 42 is a linear oscillator, it should be explained that each transverse oscillation spring corresponds to one transverse oscillator 42, and each transverse oscillator 42 is independently operated and has adjustable strength, so as to simulate the influence on the gas diffusion and seepage when surrounding drilling machines with different lengths and different drilling strengths vertically drill.
In addition, the second comparison tank further includes a vertical oscillation spring 43 and a vertical oscillator 44, where one end of the plurality of vertical oscillation springs 43 is connected to the bottom surface of the corresponding tank body 31, and the other end is connected to the output end of the vertical oscillator 44, where the vertical oscillator 44 is a linear oscillator, it is to be explained that each vertical oscillation spring corresponds to one vertical oscillator 44, and each vertical oscillator 44 is independently operated and has adjustable strength, so as to simulate the influence of surrounding drilling machines with different lengths and different drilling strengths on gas diffusion and seepage during transverse drilling.
It should be noted that, during the comparison experiment, coal dust with the same particle size and diffusion seepage data under a known standard state can be placed in the base tank 2, the first comparison tank 3 and the second comparison tank 4, wherein the vertical drill bit 31 can be driven by the vertical drill 32 to realize drilling in the vertical direction, so as to simulate the gas diffusion seepage situation during drilling perpendicular to the trend of the distribution layer, and meanwhile, the vibration of the transverse oscillator is utilized to simulate the influence on the gas diffusion seepage during the vertical drilling of the surrounding drill, so as to realize the same-direction comparison, and other experimental comparisons can be performed in the same way.
In this embodiment, the evacuation subassembly includes extraction branch pipe 5, air extraction main pipe 6 and vacuum pump 7, wherein, the one end of extraction branch pipe 5 is linked together with the bottom of basic jar 2, and the intercommunication department is located the top of bottom plate 24, and the other end communicates to on the air extraction main pipe 6, air extraction main pipe 6 is linked together with the suction end of vacuum pump 7, still be provided with manometer two 12 on the air extraction main pipe 6, still be provided with valve one on the air extraction branch pipe 5.
In this embodiment, the gas supply assembly includes a gas injection branch pipe 8, a gas injection main pipe 9 and a gas tank 10, where one end of the gas injection branch pipe 8 is communicated with the top of the base tank 2, the other end is communicated to the gas injection main pipe 9, the gas injection main pipe 9 is communicated with the gas tank 10, and a valve two is further provided on the gas injection branch pipe 8.
In this embodiment, still include measuring device, measuring device sets up on basic jar 2, measuring device includes diffusion seepage pipe 13, manometer three 14 and flow measurement table 15, the one end of diffusion seepage pipe 13 is linked together with the top of basic jar 2, and the other end is the opening, still set gradually manometer three 14, valve three and flow measurement table 15 on the diffusion seepage pipe 13.
In the specific implementation, placing coal dust with the same particle size and diffusion seepage data under a known standard state into a basic tank 2, a first comparison tank 3 and a second comparison tank 4, vacuumizing three tank bodies by using a vacuumizing assembly, keeping the three tank bodies for eight hours, then injecting equal amount of gas with certain pressure into the three tank bodies by using a gas supply assembly, keeping the three tank bodies for eight hours, and then simulating the influence of a drilling machine on gas diffusion seepage when directly drilling by using the first comparison tank 3; and simulating the influence on gas diffusion seepage when the surrounding drilling machine drills by using the second comparison tank 4, and finally collecting gas diffusion seepage data by using a measuring device.
The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. The utility model provides a coal dust gas diffusion seepage flow survey device which characterized in that: the device comprises a constant temperature box (1), a basic tank (2), a first comparison tank (3), a second comparison tank (4), a vacuumizing assembly and a gas supply assembly, wherein the basic tank (2), the first comparison tank (3) and the second comparison tank (4) are fixedly arranged in the constant temperature box (1) and are respectively connected with a suction end of the vacuumizing assembly and a supply end of the gas supply assembly;
the first comparison tank (3) can simulate the influence of a drilling machine on gas diffusion seepage when the drilling machine directly drills;
the second comparison tank (4) can simulate the influence of surrounding drilling machines on gas diffusion seepage when drilling;
the first comparison tank (3) and the second comparison tank (4) both comprise a basic tank (2), the basic tank (2) comprises a tank body (21), an upper spiral cover (22), a lower spiral cover (23), a bottom plate (24) and a compacting plate (25), wherein the upper end and the lower end of the tank body (21) are respectively connected with the upper spiral cover (22) and the lower spiral cover (23) in a threaded manner;
a bottom plate (24) for bearing coal dust is clamped on the inner side of the lower part of the tank body (21) in a sealing manner, a guide plate (27) is fixed on the upper spiral cover (22), the guide plate (27) is in threaded connection with the middle part of a control shaft (26), two ends of the control shaft (26) are polished rods, the upper polished rod is connected with a handle in a sealing sliding manner through the upper spiral cover (22), and the lower polished rod is connected with a compacting plate (25) so as to provide initial pressure for the coal dust by controlling the position height of the compacting plate (25);
and the compaction plate (25) is a grid plate with a hole body;
the first comparison tank (3) further comprises a vertical drilling head (31), a vertical drilling machine (32) and a first sealing and righting plate (33), wherein the vertical drilling head (31) vertically slides through a bottom plate (24) on a corresponding tank body (21) in a sealing way, the initial position of the vertical drilling head (31) is flush with the upper surface of the bottom plate (24), the bottom of the vertical drilling head (31) is coaxially connected with a vertical drilling shaft of the vertical drilling machine (32), the diameter of the vertical drilling head (31) is the same as the diameter of the vertical drilling shaft, the vertical drilling shaft vertically slides through the first sealing and righting plate (33), and the first sealing and righting plate (33) is positioned in a lower rotary cover (23) on the corresponding tank body (21);
the first comparison tank (3) further comprises a transverse drilling head (34), a transverse drilling machine (35) and a second sealing and righting plate (36), wherein the transverse drilling head (34) transversely slides through the corresponding tank body (21) in a sealing mode, the initial position of the transverse drilling head (34) is flush with the inner wall of the tank body (21), the other end of the transverse drilling head (34) is coaxially connected with a transverse drilling shaft of the transverse drilling machine (35), the diameter of the transverse drilling head (34) is the same as that of the transverse drilling shaft, the transverse drilling shaft is hermetically slid through the second sealing and righting plate (36), and the second sealing and righting plate (36) is located on the outer side of the corresponding pipe body (21);
the second comparison tank further comprises a transverse oscillation spring (41) and a transverse oscillator (42), wherein one ends of the transverse oscillation springs (41) are connected to the side face of the corresponding tank body (21), the other ends of the transverse oscillation springs are connected with the output end of the transverse oscillator (42), and the transverse oscillator (42) is a linear oscillator;
the second comparison tank further comprises a vertical oscillation spring (43) and a vertical oscillator (44), wherein one ends of the vertical oscillation springs (43) are connected to the bottom surface of the corresponding tank body (31), the other ends of the vertical oscillation springs are connected with the output end of the vertical oscillator (44), and the vertical oscillator (44) is a linear oscillator.
2. The coal dust gas diffusion and seepage measurement device according to claim 1, wherein: the vacuum pumping assembly comprises an air suction branch pipe (5), an air suction main pipe (6) and a vacuum pump (7), wherein one end of the air suction branch pipe (5) is communicated with the bottom of the foundation tank (2), the communicating part is located above the bottom plate (24), the other end of the air suction branch pipe is communicated to the air suction main pipe (6), the air suction main pipe (6) is communicated with the suction end of the vacuum pump (7), a pressure gauge II (12) is further arranged on the air suction main pipe (6), and a valve I is further arranged on the air suction branch pipe (5).
3. The coal dust gas diffusion and seepage measurement device according to claim 1, wherein: the gas supply assembly comprises a gas injection branch pipe (8), a gas injection main pipe (9) and a gas tank (10), wherein one end of the gas injection branch pipe (8) is communicated with the top of the foundation tank (2), the other end of the gas injection branch pipe is communicated to the gas injection main pipe (9), the gas injection main pipe (9) is communicated with the gas tank (10), and a valve II is further arranged on the gas injection branch pipe (8).
4. The coal dust gas diffusion and seepage measurement device according to claim 1, wherein: still be provided with the layering support body in basic jar (2), the layering support body is including having upper shed standing groove (16), place coal dust and layering net in proper order in standing groove (16), and the layering net of bottommost is direct to be contacted with the tank bottom of standing groove (16), the mesh of layering net is less than the particle diameter of coal dust, and can make the coal dust in the layering support body has horizontal layering trend, is located below and the left side correspondence of standing groove (16) in contrast jar one (3) and has seted up the through-hole.
5. The coal dust gas diffusion and seepage measurement device according to claim 1, wherein: the measuring device is arranged on the foundation tank (2), and comprises a diffusion seepage pipe (13), a third pressure gauge (14) and a flow measuring meter (15), one end of the diffusion seepage pipe (13) is communicated with the top of the foundation tank (2), the other end of the diffusion seepage pipe is an opening, and the third pressure gauge (14), the third valve and the flow measuring meter (15) are further arranged on the diffusion seepage pipe (13) in sequence.
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| CN202110528943.1A CN113281234B (en) | 2021-05-14 | 2021-05-14 | Coal dust gas diffusion seepage flow measuring device |
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| CN202110528943.1A CN113281234B (en) | 2021-05-14 | 2021-05-14 | Coal dust gas diffusion seepage flow measuring device |
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