CN112763283A - Coal bed gas well outlet loss gas sampling device - Google Patents

Coal bed gas well outlet loss gas sampling device Download PDF

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Publication number
CN112763283A
CN112763283A CN202110041753.7A CN202110041753A CN112763283A CN 112763283 A CN112763283 A CN 112763283A CN 202110041753 A CN202110041753 A CN 202110041753A CN 112763283 A CN112763283 A CN 112763283A
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China
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air inlet
cylinder
air
gas
outer cylinder
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CN202110041753.7A
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Chinese (zh)
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高超
吕帅锋
王生维
陈永平
董庆祥
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China University of Geosciences
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China University of Geosciences
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Priority to CN202110041753.7A priority Critical patent/CN112763283A/en
Publication of CN112763283A publication Critical patent/CN112763283A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2226—Sampling from a closed space, e.g. food package, head space
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
    • F16K1/04—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle with a cut-off member rigid with the spindle, e.g. main valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F19/00—Calibrated capacity measures for fluids or fluent solid material, e.g. measuring cups
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/08—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of piezoelectric devices, i.e. electric circuits therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2294—Sampling soil gases or the like
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2226—Sampling from a closed space, e.g. food package, head space
    • G01N2001/2229—Headspace sampling, i.e. vapour over liquid

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
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  • Biomedical Technology (AREA)
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  • Soil Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention provides a coal bed gas well water outlet escaping gas sampling device, and relates to the technical field of coal bed gas collection; the coal bed gas well water outlet escaping gas sampling device comprises a gas collecting bag, a gas inlet valve component and a gas outlet valve component; the air inlet valve assembly comprises an air inlet outer cylinder and an air inlet inner cylinder; one end of the air inlet outer cylinder is arranged on the air collecting bag; a first clapboard is arranged on the inner side wall of the air inlet outer cylinder; the air inlet inner cylinder is movably sleeved in the air inlet outer cylinder and is positioned above the first partition plate; the first partition plate, the air inlet outer cylinder and the air inlet inner cylinder are enclosed to form a first closed space; a first air duct for communicating the air collecting bag and the first closed space is arranged on the first clapboard in a penetrating way; an air inlet pipe communicated with the first closed space is arranged on the side wall of the air inlet outer cylinder; the air inlet inner cylinder is used for blocking the communication between the first air duct and the air inlet pipe; the air outlet valve component is arranged on the air collecting bag; the method can effectively sample the coal bed gas, thereby detecting the components of the coal bed gas well dissipated gas.

Description

Coal bed gas well outlet loss gas sampling device
Technical Field
The invention relates to the technical field of coal bed gas collection, in particular to a coal bed gas well water outlet escaping gas sampling device.
Background
The coal bed gas is a coal bed gas resource associated with coal and symbiotic with coal, is hydrocarbon coal bed gas stored in a coal bed, and belongs to unconventional natural gas. The main component of the coal bed gas is methane which is used as clean and efficient energy and is also a greenhouse gas, and the greenhouse gas is easy to cause greenhouse effect when being discharged in the atmosphere. Therefore, a coal bed gas sampling device needs to be developed and designed to sample and detect coal bed gas, and corresponding treatment measures are taken according to the field situation, so that resource waste and environmental pollution are avoided.
Disclosure of Invention
The invention aims to provide a coal bed gas well drainage outlet dissipated gas sampling device for sampling coal bed gas so as to collect a coal bed gas sample in time.
The embodiment of the invention provides a coal bed gas well water outlet escaping gas sampling device which comprises a gas collecting bag, a gas inlet valve component and a gas outlet valve component;
the air inlet valve assembly comprises an air inlet outer cylinder and an air inlet inner cylinder; one end of the air inlet outer cylinder is arranged on the air collecting bag; a first partition plate is arranged on the inner side wall of the air inlet outer cylinder; the air inlet inner cylinder is movably sleeved in the air inlet outer cylinder and is positioned above the first partition plate; the first partition plate, the air inlet outer cylinder and the air inlet inner cylinder enclose to form a first closed space; a first air duct for communicating the air collecting bag and the first closed space is arranged on the first clapboard in a penetrating way; an air inlet pipe communicated with the first closed space is arranged on the side wall of the air inlet outer barrel; the air inlet inner cylinder is used for isolating the communication between the first air duct and the air inlet pipe;
the gas outlet valve assembly is arranged on the gas collecting bag and used for discharging the coal bed gas in the gas collecting bag to the outside.
In some preferred embodiments, the air inlet inner cylinder comprises a first upper cylinder body and a first lower cylinder body which are integrally formed; a first internal thread is arranged on the inner side wall at the upper end of the air inlet outer cylinder; a first external thread matched with the first internal thread for use is arranged on the outer side wall of the first upper cylinder; the first upper cylinder is in threaded connection with the air inlet outer cylinder; a first rubber plug is arranged in the first upper barrel and used for closing or opening one end of the first air duct, which is positioned in the first closed space; the outer diameter of the first lower cylinder is smaller than the inner diameter of the air inlet outer cylinder, so that the air inlet pipe is communicated with the first closed space through a gap between the first lower cylinder and the air inlet outer cylinder.
In some more preferred embodiments, an annular cylindrical drying tube is sleeved outside the upper end of the first gas guide tube and used for drying coal bed gas entering the first gas guide tube; the annular cylindrical drying tube is internally filled with a first drying agent; the first air duct and the air inlet inner barrel are coaxially arranged; the inner side wall of the first lower cylinder body is attached to and connected with the outer side wall of the annular cylindrical drying tube.
In some more preferred embodiments, a first end cover is arranged at the top of the first upper cylinder body and used for facilitating the rotation of the air inlet inner cylinder.
In some more preferred embodiments, the first air duct is sleeved with a first sealing gasket; the lower surface of the first sealing gasket is in fit connection with the upper surface of the first partition plate; the first sealing gasket is matched with the first lower cylinder and used for further isolating the communication between the first air duct and the air inlet pipe.
In some more preferred embodiments, the first upper barrel is externally sleeved with a second sealing gasket; the upper surface of the second sealing gasket is attached to the lower surface of the first end cover; the lower surface of the second sealing gasket is used for abutting against the top of the air inlet outer cylinder.
In some more preferred embodiments, a first sealing ring is fixed on the outer side wall of the first lower cylinder; the first sealing ring is located above the air inlet pipe and is abutted to the inner side wall of the air inlet outer barrel.
In some more preferred embodiments, a second sealing ring is fixedly arranged on the outer side wall of the first lower cylinder; the second sealing ring is positioned below the first sealing ring; the second sealing ring, the first lower cylinder body and the air inlet outer cylinder are matched and used for further isolating the first air duct from being communicated with the air inlet pipe.
In some preferred embodiments, one end of the air inlet pipe is communicated with a spherical drying pipe for drying the coal bed gas entering the air inlet pipe; and a second drying agent is filled in the spherical drying tube.
In some preferred embodiments, one end of the air inlet pipe is connected with a one-way valve for preventing coal bed methane from being sucked to the outside of the air collecting bag.
In some preferred embodiments, a patch type piezoelectric buzzer and a programmable timer are further arranged on the air collecting bag; the patch type piezoelectric buzzer is electrically connected with the programmable timer.
In some preferred embodiments, the air outlet valve assembly comprises an air outlet outer cylinder and an air outlet inner cylinder; one end of the air outlet outer cylinder is arranged on the air collecting bag; a second partition plate is arranged on the inner side wall of the air outlet outer cylinder; the air outlet inner cylinder is movably sleeved in the air inlet and outlet outer cylinder and is positioned above the second partition plate; the second partition plate, the air outlet outer cylinder and the air outlet inner cylinder enclose to form a second closed space; a second air duct for communicating the air collecting bag and the second closed space is arranged on the second clapboard in a penetrating way; an air outlet pipe communicated with the second closed space is arranged on the side wall of the air outlet outer cylinder; the air outlet inner cylinder is used for separating the communication between the second air duct and the air outlet pipe.
In some more preferred embodiments, the outlet inner cylinder comprises a second upper cylinder body and a second lower cylinder body which are integrally formed; a second internal thread is arranged on the inner side wall at the upper end of the air outlet outer cylinder; a second external thread matched with the second internal thread for use is arranged on the outer side wall of the second upper cylinder; the second upper cylinder body is in threaded connection with the air outlet outer cylinder; a second rubber plug is arranged in the second upper barrel and used for closing or opening one end of the second air duct, which is positioned in the second closed space; the outer diameter of the second lower cylinder is smaller than the inner diameter of the air outlet outer cylinder, so that the air outlet pipe is communicated with the second closed space through a gap between the second lower cylinder and the air outlet outer cylinder.
In some more preferred embodiments, a second end cover is arranged at the top of the second upper cylinder body and used for facilitating the rotation of the air outlet inner cylinder body.
In some more preferred embodiments, a third sealing gasket is sleeved on the second air duct; the lower surface of the third sealing gasket is in fit connection with the upper surface of the second partition plate; and the third sealing gasket is matched with the second lower cylinder and is used for further isolating the communication between the second air duct and the air outlet duct.
In some more preferred embodiments, the second upper barrel is externally sleeved with a fourth sealing gasket; the upper surface of the fourth sealing gasket is attached to the lower surface of the second end cover; and the lower surface of the fourth sealing gasket is used for being abutted against the top of the air outlet outer barrel.
In some more preferred embodiments, a third sealing ring is fixed on the outer side wall of the second lower cylinder; and the third sealing ring is positioned above the air outlet pipe and is abutted against the inner side wall of the air outlet outer cylinder.
In some more preferred embodiments, a fourth sealing ring is fixedly arranged on the outer side wall of the second lower cylinder; the fourth sealing ring is positioned below the third sealing ring; and the fourth sealing ring, the second lower barrel and the air outlet outer barrel are matched and used for further isolating the communication between the second air duct and the air outlet pipe.
In some more preferred embodiments, the second end cap is provided with a sampling hole for facilitating sampling of the syringe.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: the coal bed gas well water outlet dissipated gas sampling device comprises a gas collecting bag, a gas inlet valve component and a gas outlet valve component; the air inlet valve assembly comprises an air inlet outer cylinder and an air inlet inner cylinder; one end of the air inlet outer cylinder is arranged on the air collecting bag; a first partition plate is arranged on the inner side wall of the air inlet outer cylinder; the air inlet inner cylinder is movably sleeved in the air inlet outer cylinder and is positioned above the first partition plate; the first partition plate, the air inlet outer cylinder and the air inlet inner cylinder enclose to form a first closed space; the first clapboard is provided with a first air duct for communicating the air collecting bag with the first closed space; an air inlet pipe communicated with the first closed space is arranged on the side wall of the air inlet outer barrel; the air inlet inner cylinder is used for isolating the communication between the first air duct and the air inlet pipe; the gas outlet valve assembly is arranged on the gas collecting bag and used for discharging the coal bed gas in the gas collecting bag to the outside; by providing the inlet valve assembly and the outlet valve assembly on the air collection bag; during sampling, the coal bed gas is guided into the gas collecting bag through the gas inlet valve assembly, components of the coal bed gas are detected, the coal bed gas sampling device can be suitable for a coal bed gas drainage port dissipated gas sampling environment, the coal bed gas is effectively sampled, and therefore component detection of the dissipated gas of the coal bed gas well is conducted.
Drawings
FIG. 1 is a schematic structural diagram of a device for sampling coal bed gas well drainage outlet stray gas in an embodiment of the invention.
Fig. 2 is a schematic structural diagram of an air inlet valve assembly 2 in the coal bed gas well drainage outlet stray gas sampling apparatus of fig. 1.
Fig. 3 is a schematic structural view of the intake inner cylinder 21 of the intake valve assembly 2 of fig. 2.
Fig. 4 is a schematic structural diagram of the air outlet valve assembly 1 in the coal-bed gas well drainage outlet dissipated gas sampling device in fig. 1.
Fig. 5 is a schematic structural diagram of the outlet inner barrel 11 in the outlet valve assembly 1 of fig. 4.
Fig. 6 is a schematic view of the hollow cylindrical drying duct 24 of the intake valve assembly 2 of fig. 2.
Fig. 7 is a side view of the hollow cylindrical drying duct 24 of fig. 6.
Fig. 8 is a cross-sectional view in the direction a-a of the annular cylindrical drying tube 24 of fig. 7.
Wherein, 1, the air outlet valve component; 11. an air outlet inner cylinder; 111. a second end cap; 112. a second upper cylinder; 113. a second lower cylinder; 114. a sampling hole; 115. a second rubber plug; 12. a third sealing gasket; 13. a second air duct; 14. a third seal ring; 15. a fourth seal ring; 16. a fourth sealing gasket; 17. a second separator; 18. an air outlet outer cylinder; 19. an air outlet pipe; 2. an intake valve assembly; 21. an air inlet inner cylinder; 211. a first end cap; 212. a first upper cylinder; 213. a first lower cylinder; 214. a first rubber plug; 22. a first sealing gasket; 23. a first air duct; 24. an annular cylindrical drying tube; 241. a first annular plate; 242. a first air vent; 243. a first cylinder; 244. a second cylinder; 245. a second annular plate; 246. a second air hole; 247. an annular connecting portion; 248. a first desiccant; 25. a first seal ring; 26. an air inlet pipe; 27. a second seal ring; 28. a second sealing gasket; 29. a first separator; 210. an air inlet outer cylinder; 3. an air collecting bag; 4. a spherical drying tube; 41. a second desiccant; 5. a one-way valve; 6. a programmable timer; 7. paster type piezoelectric buzzer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1-5, an embodiment of the invention provides a device for sampling gas leaked from a drainage port of a coal-bed gas well, which comprises a gas collecting bag 3, an air inlet valve assembly 2, an air outlet valve assembly 1, a spherical drying pipe 4 and a one-way valve 5.
The air inlet valve assembly 2 comprises an air inlet outer cylinder 210 and an air inlet inner cylinder 21; one end of the air inlet outer cylinder 210 is arranged on the air collecting bag 3; the bottom of the air inlet outer cylinder 210 is provided with a first fixed seat (not shown in the figure); the air inlet outer cylinder 210 and the first fixed seat are integrally formed; the first fixed seat is glued with the gas collection bag 3; a first clapboard 29 is arranged on the inner side wall of the air inlet outer cylinder 210; the air inlet inner cylinder 21 is movably sleeved in the air inlet outer cylinder 210 and is positioned above the first partition plate 29; the air inlet inner cylinder 21 can move up and down in the air inlet outer cylinder 210 along the axial direction of the air inlet outer cylinder 210; the first partition 29, the air inlet outer cylinder 210 and the air inlet inner cylinder 21 enclose to form a first closed space; a first air duct 23 for communicating the air collecting bag 3 and the first closed space is arranged on the first clapboard 29 in a penetrating way; one end of the first air duct 23 is vertically arranged on the first clapboard 29 and is communicated with the air collecting bag 3 through the lower end of the air inlet outer cylinder 210; the first air duct 23 is coaxially arranged with the air inlet inner barrel 21; an air inlet pipe 26 communicated with the first closed space is arranged on the side wall of the air inlet outer cylinder 210; the air inlet inner cylinder 21 is used for blocking the communication between the first air duct 23 and the air inlet pipe 26; the air inlet outer cylinder 210, the first partition 29, the first air duct 23 and the air inlet pipe 26 are integrally formed.
The gas outlet valve component 1 is arranged on the gas collecting bag 3 and used for discharging the coal bed gas in the gas collecting bag 3 to the outside; the air outlet valve component 1 comprises an air outlet outer cylinder 18 and an air outlet inner cylinder 11; one end of the air outlet outer cylinder 18 is arranged on the air collecting bag 3; the bottom of the air outlet outer cylinder 18 is provided with a second fixed seat; the air outlet outer cylinder 18 and the second fixed seat are integrally formed; the second fixed seat is glued with the gas collection bag 3; a second clapboard 17 is arranged on the inner side wall of the air outlet outer cylinder 18; the air outlet inner cylinder 11 is movably sleeved in the air inlet and outlet outer cylinder 18 and is positioned above the second partition plate 17; the air outlet inner cylinder 11 can move up and down in the air outlet outer cylinder 18 along the axial direction of the air outlet outer cylinder 18; a second partition plate 17, an air outlet outer cylinder 18 and an air outlet inner cylinder 11 are enclosed to form a second closed space; a second air duct 13 for communicating the air collecting bag 3 with the second closed space is arranged on the second clapboard 17 in a penetrating way; one end of the second air duct 13 is vertically arranged on the second clapboard 17 and is communicated with the air collection bag 3 through the lower end of the air outlet outer cylinder 18; the second gas-guide tube 13 is coaxially arranged with the gas outlet inner barrel 11; an air outlet pipe 19 communicated with the second closed space is arranged on the side wall of the air outlet outer cylinder 18; the air outlet inner cylinder 11 is used for blocking the communication between the second air duct 13 and the air outlet pipe 19; the second clapboard 17, the second air duct 13, the air outlet outer cylinder 18 and the air outlet pipe 19 are integrally formed.
One end of the air inlet pipe 26 is communicated with the spherical drying pipe 4 and is used for drying the coal bed gas entering the air inlet pipe 26; the spherical drying tube 4 is filled with a second drying agent 41; one end of the spherical drying tube 4 is in threaded connection with one end of the air inlet tube 26, and the other end is communicated with the one-way valve 5.
The one-way valve 5 is in threaded connection with the other end of the spherical drying tube 4 and is used for preventing coal bed gas from being sucked to the outside of the gas collection bag 3.
Specifically, the intake inner cylinder 21 includes a first upper cylinder 212 and a first lower cylinder 213 integrally formed; a first internal thread is arranged on the inner side wall at the upper end of the air inlet outer cylinder 210; a first external thread matched with the first internal thread is arranged on the outer side wall of the first upper cylinder 212; the first upper cylinder 212 is in threaded connection with the air inlet outer cylinder 210; a first rubber plug 214 is arranged in the first upper cylinder 212 and is used for closing or opening one end of the first air duct 23 in the first closed space; the outer diameter of the first lower cylinder 213 is smaller than the inner diameter of the air inlet outer cylinder 210, so that the air inlet pipe 26 is communicated with the first closed space through a gap between the first lower cylinder 213 and the air inlet outer cylinder 210; in order to facilitate the rotation of the air inlet inner cylinder 21, a first end cover 211 is arranged at the top of the first upper cylinder 212, and the first end cover 211 and the air inlet inner cylinder 21 are integrally formed; the coal bed gas passes through the one-way valve 5, the spherical drying pipe 4 and the air inlet pipe 26 and then enters the first closed space through a gap between the first lower cylinder 213 and the air inlet outer cylinder 210; the first end cover 211 is rotated to enable the air inlet inner barrel 21 to move upwards along the axial direction of the air inlet outer barrel 210, so that the first rubber plug 214 moves upwards along with the air inlet inner barrel, the first air duct 23 is communicated with the first closed space, and the coal bed gas entering the first closed space enters the gas collecting bag 3 through the first air duct 23.
Further, in order to dry the coal bed gas entering the first gas guide pipe 23 from the gas inlet pipe 26, an annular cylindrical drying pipe 24 is sleeved outside the upper end of the first gas guide pipe 23; the upper end of the first air duct 23 protrudes out of the top of the annular cylindrical drying tube 24, so that the first air duct can be conveniently abutted against the first rubber plug 214; the first air duct 23 is connected with an annular cylindrical drying tube 24 in a cementing manner; the annular cylindrical drying tube 24 is filled with a first desiccant 248; the first air duct 23 is coaxially arranged with the air inlet inner barrel 21; the inner side wall of the first lower cylinder 213 is attached to the outer side wall of the annular cylindrical drying tube 24; the coal bed gas passes through the gap between the first lower cylinder 213 and the gas inlet outer cylinder 210 after flowing through the gas inlet pipe 26, and enters the first gas guide pipe 23 after passing through the annular cylindrical drying pipe 24, and the coal bed gas flowing through the annular cylindrical drying pipe 24 is dried again.
Specifically, referring to fig. 6-8, the annular cylindrical drying tube 24 includes a first cylinder 243 and a second cylinder 244 sleeved within the first cylinder 243; the first cylinder 243 and the second cylinder 244 are coaxially disposed; the two end faces of the first cylinder 243 and the second cylinder 244 are flush; a first annular plate 241 is disposed between the tops of the first and second cylinders 243 and 244; the first annular plate 241 is provided with a first air hole 242 for facilitating the coal bed gas dried by the first desiccant 248 to enter the first air duct 23 through the first air hole 242; a second annular plate 245 is detachably provided between the bottoms of the first cylinder 243 and the second cylinder 244; an annular connecting portion 247 is provided on an upper surface of the second annular plate 245; the outer side of the annular connecting part 247 is screwed with the inner side of the bottom of the first cylinder 243; the second cylinder 244 is connected with the spigot of the second annular plate 245; the first cylinder 243, the second cylinder 244, the first annular plate 241 and the second annular plate 245 enclose a cavity for containing the first desiccant 248; a second air hole 246 is formed in the second annular plate 245, and the second air hole 246 is communicated with the cavity, so that the coal bed gas can conveniently enter the cavity and contact with the first drying agent 248; the first cylinder 243, the second cylinder 244, and the first annular plate 241 are integrally formed; the second annular plate 245 is integrally formed with the annular connecting portion 247.
In this embodiment, the first desiccant 248 and the second desiccant 41 are silica gel granular desiccants.
Further, referring to fig. 2 and 3, in order to improve the air tightness of the intake valve assembly 2, the first air duct 23 is sleeved with a first sealing gasket 22; the lower surface of the first sealing gasket 22 is in fit connection with the upper surface of the first partition 29; the first sealing gasket 22 is matched with the first lower cylinder 213 and used for further blocking the communication between the first air duct 23 and the air inlet pipe 26; the first upper cylinder 212 is sleeved with a second sealing gasket 28; the upper surface of the second sealing gasket 28 is attached to the lower surface of the first end cap 211; the lower surface of the second sealing gasket 28 is adapted to abut against the top of the intake outer cylinder 210; when the bottom of the first rubber stopper 214 abuts against the upper end face of the first air duct 23 by rotating the first end cap 211, the upper end of the first air duct 23 is sealed; at this time, the upper end surface of the intake outer tube 210 abuts against the second gasket 28, and airtightness between the first end cover 211 and the upper end of the intake outer tube 210 is improved; meanwhile, the bottom of the first lower cylinder 213 abuts against the first sealing gasket 22, so that the coal bed gas entering the gap between the first lower cylinder 213 and the air inlet outer cylinder 210 cannot enter the annular cylindrical drying pipe 24, and the air tightness of the air inlet valve assembly 2 is improved.
In order to further improve the air tightness of the intake valve assembly 2, a first seal ring 25 is fixed on the outer side wall of the first lower cylinder 213; the first sealing ring 25 is positioned above the air inlet pipe 26 and is abutted against the inner side wall of the air inlet outer cylinder 210; the outer side wall of the first lower cylinder 213 is fixedly provided with a second sealing ring 27; the second seal ring 27 is positioned below the first seal ring 25; the second sealing ring 27, the first lower cylinder 213 and the air inlet outer cylinder 210 are matched and used for further blocking the first air duct 23 from being communicated with the air inlet pipe 26; when the bottom of the first rubber plug 214 abuts against the top of the first air duct 23, the first sealing ring 25 is located above the air inlet pipe 26, and the second sealing ring 27 is located below the air inlet pipe 26, so that the joint of the air inlet pipe 26 and the air inlet outer cylinder 210 is located between the first sealing ring 25 and the second sealing ring 27, and the coal bed gas is further prevented from entering the annular cylindrical drying tube 24; when the coal bed gas needs to be sampled, the first end cover 211 is rotated to enable the air inlet inner cylinder 21 to move upwards to a position above the air inlet pipe 26, the first sealing ring 25 and the second sealing ring 27 are both located above the air inlet pipe 26, the coal bed gas enters the cavity through the gap between the first lower cylinder 213 and the air inlet outer cylinder 210 and the second air hole 246 to be in contact with the first drying agent 248, and then enters the gas collection bag 3 through the first air hole 242 and the first air duct 23, so that the coal bed gas is sampled.
Specifically, referring to fig. 4 and 5, the outlet inner cylinder 11 includes a second upper cylinder 112 and a second lower cylinder 113 which are integrally formed; a second internal thread is arranged on the inner side wall at the upper end of the air outlet outer cylinder 18; a second external thread matched with the second internal thread is arranged on the outer side wall of the second upper cylinder 112; the second upper cylinder 112 is in threaded connection with the air outlet outer cylinder 18; a second rubber plug 115 is arranged in the second upper cylinder 112 and is used for closing or opening one end of the second air duct 13, which is located in the second closed space; the outer diameter of the second lower cylinder 113 is smaller than the inner diameter of the air outlet outer cylinder 18, so that the air outlet pipe 19 is communicated with the second closed space through a gap between the second lower cylinder 113 and the air outlet outer cylinder 18; in order to facilitate the rotation of the air outlet inner barrel 11, a second end cover 111 is arranged at the top of the second upper barrel 112; when the coal bed gas in the gas collecting bag 3 needs to be discharged, the second end cover 111 is rotated, so that the gas outlet inner cylinder 11 moves upwards along the axial direction of the gas outlet outer cylinder 18, the second rubber plug 115 is driven to move upwards, and the upper end of the second gas guide pipe 13 is communicated with the second closed space; the coal bed gas in the gas collecting bag 3 flows through the second gas guide pipe 13, the second closed space and a gap between the second lower cylinder 113 and the gas outlet outer cylinder 18 and is discharged through the gas outlet pipe 19.
A third sealing gasket 12 is sleeved on the second air duct 13; the lower surface of the third sealing gasket 12 is in fit connection with the upper surface of the second partition plate 17; the third sealing gasket 12 is matched with the second lower cylinder 113 and used for further blocking the communication between the second air duct 13 and the air outlet pipe 19; a fourth sealing gasket 16 is sleeved outside the second upper cylinder 112; the upper surface of the fourth sealing gasket 16 is attached to the lower surface of the second end cap 111; the lower surface of the fourth sealing gasket 16 is used for abutting against the top of the air outlet outer cylinder 18; when the second rubber plug 115 abuts against the upper end of the second air duct 13, the upper end of the air outlet outer cylinder 18 abuts against the fourth sealing gasket 16, so that the air tightness between the second end cover 111 and the air outlet outer cylinder 18 is improved; meanwhile, the bottom of the second lower cylinder 113 abuts against the third sealing gasket 12, so that the coal bed gas in the second closed space cannot enter a gap between the second lower cylinder 113 and the gas outlet outer cylinder 18, and the gas tightness of the gas outlet valve assembly 1 is improved.
A third sealing ring 14 is fixed on the outer side wall of the second lower cylinder 113; the third sealing ring 14 is positioned above the air outlet pipe 19 and is abutted against the inner side wall of the air outlet outer cylinder 18; a fourth sealing ring 15 is fixedly arranged on the outer side wall of the second lower cylinder 113; the fourth seal ring 15 is positioned below the third seal ring 14; the fourth sealing ring 15, the second lower cylinder 113 and the air outlet outer cylinder 18 are matched and used for further blocking the communication between the second air duct 13 and the air outlet pipe 19; when the second rubber plug 115 is abutted to the upper end of the second air duct 13, the third sealing ring 14 and the fourth sealing ring 15 are respectively positioned above and below the joint of the air outlet pipe 19 and the air outlet outer cylinder 18, so that the air tightness of the air outlet valve assembly 1 is further improved; when the coal bed gas in the gas collecting bag 3 needs to be discharged to the outside, when the second end cover 111 is rotated to enable the gas outlet inner cylinder 11 to move upwards to a position above the joint of the gas outlet pipe 19 and the gas outlet outer cylinder 18, the coal bed gas in the gas collecting bag 3 flows through the second gas guide pipe 13, the second closed space and the gap between the second lower cylinder 113 and the gas outlet outer cylinder 18, and is discharged through the gas outlet pipe 19.
In order to conveniently sample the coal bed gas in the gas collection bag 3 by using the needle cylinder, the second end cover 111 is provided with a sampling hole 114; when the sampling is needed, the sampling hole 114 is used for puncturing the second rubber plug 115 so that the needle cylinder is inserted into the second air duct 13 for sampling, and the sampling is simple and convenient.
Furthermore, a patch type piezoelectric buzzer 7 and a programmable timer 6 are also arranged on the gas collection bag 3; the patch type piezoelectric buzzer 7 is attached to the outer surface of the gas collection bag 3, pressure signals are converted into electric signals through piezoelectric conversion by sensing pressure changes generated by deformation of the gas collection bag 3 in the gas collection process, when the deformation of the gas collection bag 3 reaches a certain degree, namely a certain pressure threshold value is reached, the converted electric signals reach a current threshold value, a buzzing alarm is triggered, and it is determined that the gas collection bag 3 is full of coal bed gas; the patch type piezoelectric buzzer 7 is electrically connected with the programmable timer 6; when the programmable timer 6 senses the current transmitted from the patch type piezoelectric buzzer 7, starting timing; when the current reaches a threshold value, the patch type piezoelectric buzzer 7 buzzes to alarm, the programmable timer 6 automatically controls to stop timing, and records the use time of the gas collecting bag 3 for collecting the coal bed gas, the dissipation amount of the coal bed gas at a drainage port of the coal bed gas well in unit time can be calculated according to the volume of the gas collecting bag 3 and the time required for filling the coal bed gas, so that the staff can conveniently count the dissipation amount of the coal bed gas, and take corresponding treatment measures according to the specific dissipation amount.
Specifically, in the present embodiment, the programmable timer 6 is a timer of model TLC555IDR TI 8-SOIC produced by shenzhen huaqinqiu electronic limited commune; the patch type piezoelectric buzzer 7 is of the type KLJ-1706.
The working process of the coal bed gas well drainage outlet dissipated gas sampling device in the embodiment is as follows:
when the coal bed gas needs to be sampled, the first end cover 211 is rotated to enable the air inlet inner cylinder 21 to move upwards to the air inlet pipe 26 to be communicated with the first air duct 23; rotating the second end cap 111 to make the air outlet inner barrel 11 move downwards until the second rubber plug 115 abuts against the top of the second air duct 13, and closing the top of the second air duct 13; the coal bed gas sequentially flows through the one-way valve 5, the spherical drying pipe 4, the air inlet pipe 26, the gap between the air inlet outer cylinder 210 and the first lower cylinder 213, enters the first closed space, and then enters the gas collection bag 3 through the annular cylindrical drying pipe 24 and the first gas guide pipe 23; when the patch type piezoelectric buzzer 7 detects that the air collecting bag 3 starts to expand, a timing signal is sent to the programmable timer 6, and the programmable timer 6 starts to time; when the patch type piezoelectric buzzer 7 detects that the air collecting bag 3 expands to a certain degree, namely reaches a pressure threshold value, the patch type piezoelectric buzzer 7 buzzes to alarm and sends a timing termination signal to the programmable timer 6, and the programmable timer 6 terminates timing and records sampling time; meanwhile, when the worker stops sampling the coal bed gas, the air inlet inner cylinder 21 is moved downwards to the position where the first rubber plug 214 is abutted to the upper end of the first air duct 23 by rotating the first end cover 211, the upper end of the first air duct 23 is sealed, the coal bed gas can be sampled, the loss of the coal bed gas at the water outlet of the coal bed gas well in unit time can be calculated according to the volume of the air collecting bag 3 and the time required for filling the coal bed gas, and the worker can conveniently count the loss of the coal bed gas;
when the sample of the sampling in the gas collection bag 3 needs to be detected, only the outlet pipe 19 and the detection instrument need to be communicated, and then the second end cover 111 is rotated, so that the outlet inner cylinder 11 moves upwards to separate the second rubber plug 115 from the second air guide pipe 13, and the outlet pipe 19 is realized, and the conduction of the second closed space, the second air guide pipe 13 and the gas collection bag 3 is completed.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A coal bed gas well outlet escaping gas sampling device is characterized by comprising a gas collecting bag, a gas inlet valve component and a gas outlet valve component;
the air inlet valve assembly comprises an air inlet outer cylinder and an air inlet inner cylinder; one end of the air inlet outer cylinder is arranged on the air collecting bag; a first partition plate is arranged on the inner side wall of the air inlet outer cylinder; the air inlet inner cylinder is movably sleeved in the air inlet outer cylinder and is positioned above the first partition plate; the first partition plate, the air inlet outer cylinder and the air inlet inner cylinder enclose to form a first closed space; a first air duct for communicating the air collecting bag and the first closed space is arranged on the first clapboard in a penetrating way; an air inlet pipe communicated with the first closed space is arranged on the side wall of the air inlet outer barrel; the air inlet inner cylinder is used for isolating the communication between the first air duct and the air inlet pipe;
the gas outlet valve assembly is arranged on the gas collecting bag and used for discharging the coal bed gas in the gas collecting bag to the outside.
2. The coalbed methane well drain opening dissipated gas sampling device of claim 1, wherein the air inlet inner barrel comprises a first upper barrel and a first lower barrel which are integrally formed; a first internal thread is arranged on the inner side wall at the upper end of the air inlet outer cylinder; a first external thread matched with the first internal thread for use is arranged on the outer side wall of the first upper cylinder; the first upper cylinder is in threaded connection with the air inlet outer cylinder; a first rubber plug is arranged in the first upper barrel and used for closing or opening one end of the first air duct, which is positioned in the first closed space; the outer diameter of the first lower cylinder is smaller than the inner diameter of the air inlet outer cylinder, so that the air inlet pipe is communicated with the first closed space through a gap between the first lower cylinder and the air inlet outer cylinder.
3. The coalbed methane well drain opening dissipated gas sampling device as recited in claim 2, wherein an annular cylindrical drying tube is sleeved outside the upper end of the first gas guide tube and is used for drying coalbed methane entering the first gas guide tube; the annular cylindrical drying tube is internally filled with a first drying agent; the first air duct and the air inlet inner barrel are coaxially arranged; the inner side wall of the first lower cylinder body is attached to and connected with the outer side wall of the annular cylindrical drying tube.
4. The coalbed methane well drain opening dissipated gas sampling device as set forth in claim 2, wherein a first end cap is provided on the top of said first upper cylinder for facilitating rotation of said air inlet inner cylinder.
5. The coalbed methane well drain outlet dissipated gas sampling device of claim 2, wherein a first sealing gasket is sleeved on the first gas guide pipe; the lower surface of the first sealing gasket is in fit connection with the upper surface of the first partition plate; the first sealing gasket is matched with the first lower cylinder and used for further isolating the communication between the first air duct and the air inlet pipe.
6. The coalbed methane well outlet dissipated gas sampling device of claim 4, wherein a second sealing gasket is sleeved outside the first upper cylinder; the upper surface of the second sealing gasket is attached to the lower surface of the first end cover; the lower surface of the second sealing gasket is used for abutting against the top of the air inlet outer cylinder.
7. The coalbed methane well drain outlet dissipated gas sampling device of claim 2, wherein a first sealing ring is fixed on the outer side wall of the first lower cylinder; the first sealing ring is located above the air inlet pipe and is abutted to the inner side wall of the air inlet outer barrel.
8. The coalbed methane well drain outlet dissipated gas sampling device as set forth in claim 2, wherein a second sealing ring is fixedly arranged on the outer side wall of the first lower cylinder; the second sealing ring is positioned below the first sealing ring; the second sealing ring, the first lower cylinder body and the air inlet outer cylinder are matched and used for further isolating the first air duct from being communicated with the air inlet pipe.
9. The coalbed methane well drain outlet dissipated gas sampling device as recited in claim 1, wherein one end of the air inlet pipe is communicated with a spherical drying pipe for drying the coalbed methane entering the air inlet pipe; and a second drying agent is filled in the spherical drying tube.
10. The coalbed methane well drain opening dissipated gas sampling device as set forth in claim 1, wherein a one-way valve is connected to one end of said air inlet pipe for preventing coalbed methane from being sucked back to the outside of said air collection bag.
CN202110041753.7A 2021-01-13 2021-01-13 Coal bed gas well outlet loss gas sampling device Pending CN112763283A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110041753.7A CN112763283A (en) 2021-01-13 2021-01-13 Coal bed gas well outlet loss gas sampling device

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Application Number Priority Date Filing Date Title
CN202110041753.7A CN112763283A (en) 2021-01-13 2021-01-13 Coal bed gas well outlet loss gas sampling device

Publications (1)

Publication Number Publication Date
CN112763283A true CN112763283A (en) 2021-05-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110041753.7A Pending CN112763283A (en) 2021-01-13 2021-01-13 Coal bed gas well outlet loss gas sampling device

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117367897A (en) * 2023-10-18 2024-01-09 南通仁隆科研仪器有限公司 Self-sealing type coalbed methane sampling device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117367897A (en) * 2023-10-18 2024-01-09 南通仁隆科研仪器有限公司 Self-sealing type coalbed methane sampling device

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