CN108979632A - Simple gas sample collecting device for air and method in a kind of exploratory hole on the stratum containing shallow gas - Google Patents
Simple gas sample collecting device for air and method in a kind of exploratory hole on the stratum containing shallow gas Download PDFInfo
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- CN108979632A CN108979632A CN201811039975.XA CN201811039975A CN108979632A CN 108979632 A CN108979632 A CN 108979632A CN 201811039975 A CN201811039975 A CN 201811039975A CN 108979632 A CN108979632 A CN 108979632A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 131
- 238000000926 separation method Methods 0.000 claims abstract description 90
- 239000011268 mixed slurry Substances 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 229920001296 polysiloxane Polymers 0.000 claims description 20
- 239000002689 soil Substances 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 9
- 238000007872 degassing Methods 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000012790 confirmation Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims 1
- 235000019698 starch Nutrition 0.000 claims 1
- 239000008107 starch Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000011835 investigation Methods 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 136
- 238000005086 pumping Methods 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 8
- 230000003068 static effect Effects 0.000 description 6
- 239000000284 extract Substances 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 210000002966 serum Anatomy 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 235000019082 Osmanthus Nutrition 0.000 description 1
- 241000333181 Osmanthus Species 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/084—Obtaining fluid samples or testing fluids, in boreholes or wells with means for conveying samples through pipe to surface
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention belongs to the geotechnical engineering investigation fields in field of civil engineering, it is related in a kind of exploratory hole on stratum containing shallow gas simple gas sample collecting device for air and method, which includes funnel, hose, diaphragm pump, gas-liquid separation container, pulp-expelling valve, micro-suction pump and vacuum collection airbag；Funnel is connected by hose with diaphragm pump；Diaphragm pump is connected by hose with gas-liquid separation container；The top and bottom of gas-liquid separation container are respectively arranged with micro-suction pump and pulp-expelling valve；Micro-suction pump is connected with vacuum collection airbag.The present invention provides a kind of based on geological prospecting borehole, do not limited by gas-bearing layer buried depth and gas production process is not easy in the exploratory hole for being mixed into the stratum containing shallow gas of air or impurity simple gas sample collecting device for air and method.
Description
Technical field
The invention belongs to the geotechnical engineering investigation field in field of civil engineering, be related to a kind of simple gas sample collecting device for air and
Simple gas sample collecting device for air and method in acquisition method more particularly to a kind of exploratory hole on stratum containing shallow gas.
Background technique
Shallow gas refers to the shallow layer gas being embedded within earth's surface or less 1500m.Stratum rich in shallow gas is known as containing
Gas-bearing formation.Gas-bearing layer is generally distributed in Marsh Wetland, river mouth, delta, lake and Seabed sediments and oily resource is opposite
In shallow stratum abundant.Gas in soil layer is mostly derived from organic matter and is decomposed to form and biogenetic gas under anaerobic bacteria effect
With in Deep Oil-gas, earth mantle gas and magma lithogenesis activity produced by and by being migrated and being sealed upwards after leakage and diffusion
Close the gas in superficial stratum.Shallow gas is in the Along The East Coast of Zhejiang And Jiangsu Provinces in China, Yangtze River Delta, the Caidamu Basin, Song-liao basin, Bohai Sea
There is different degrees of preservation in the Small-middle Basin in bay basin and the southern Yunnan osmanthus Qian Yue area, wherein in southeastern coast, the Changjiang river
Lower Reaches include that be distributed mainly on the 4th coastal, riverine system flat for the shallow gas in Soviet Union, Zhejiang, Shanghai, Fujian, Guangdong, fine jade, Hunan, Hubei Province, Jiangxi etc.
In original.Gas-bearing formation belongs to a kind of special geological disaster --- shallow gas geological disaster for civil engineering.China is famous
Construction of Hangzhou Bay Cross-sea Bridge just once occurred shallow gas eruption burning during the engineering investigation of early period ship caused to be spoken sarcastically wound
Accident.As underground space development is goed deep into China, more and more engineerings have suffered from underground shallow layer gas, shallow gas calamity
Evil geological problem is more prominent.For engineering, when meeting with gas-bearing formation, it is necessary first to find out the master of underground pernicious gas
Preservation layer position, distribution of gas reservoir area and thickness are wanted, while being also required to get clear the main Types of gas, ingredient, producing gas stage and year
The information such as generation, for inferring the occurrence status of gas-bearing formation in built engineering ground, gas source and gather qi together process, and assessment to work
The possibility extent of injury of journey.This is just needed in survey, carries out live in situ sampling to the gas of preservation in gas-bearing formation,
Then progress gas sample assay in laboratory is brought into.Therefore, the quality of acquired gaseous sample directly affects test result
Accuracy, and then influence reasonable judgement to engineering.
Currently, being acquired in the inspection of the scene of a crime to the gaseous sample in gas-bearing formation, mostly dependent on static sounding in situ or petroleum
The professional sampler of natural gas department.The method of static sounding in situ is that sounding rod is pressed into gas-bearing layer, and gas passes through hollow
Sounding rod overflow earth's surface, gas sampling bag or sampling bottle are installed in the outlet end of static sounding bar and carry out gas sample acquisition.Due to
Often aqueous vapor sprays static sounding bar and also tends to be that water, gas, soil particle spray together, severe jamming goes out gas-bearing formation with producing
The purity of the gas of mouth end acquisition；Meanwhile before static sounding bar leakproofness is poor, and gas sprays ground in gas-bearing layer,
It has been mixed into more air in bar, has caused in outlet end gaseous sample collected because being mixed into air without having representativeness, no
It can reflect the gas componant in prime stratum, really so as to cause the gas sample assay result of inaccuracy.In addition, for buried depth
Relatively depth or there is the gas-bearing formation that capping layer is covered on harder, static sounding, which is difficult to be pressed into and arrive at destination layer position, carries out gas production.
On the other hand, the professional sampler structure of petroleum gas department is complicated, at high price, and geotechnical engineering investigation unit is generally not
It is standby to have these professional sampling cartridges.
Summary of the invention
In order to solve the above technical problems in background technology, the present invention provides one kind is bored based on geological prospecting
Hole is not limited and gas production process is not easy to be mixed into the exploration on the stratum containing shallow gas of air or impurity by gas-bearing layer buried depth
Simple gas sample collecting device for air and method in hole.
To achieve the goals above, the present invention adopts the following technical scheme:
Simple gas sample collecting device for air in a kind of exploratory hole on the stratum containing shallow gas, it is characterised in that: it is described containing shallow gas
Simple gas sample collecting device for air includes funnel, hose, diaphragm pump, gas-liquid separation container, pulp-expelling valve, miniature pumping in the exploratory hole of layer
Pump and vacuum collection airbag；The funnel is connected by hose with diaphragm pump；The diaphragm pump passes through hose and gas-liquid separation
Container is connected；The top and bottom of the gas-liquid separation container are respectively arranged with micro-suction pump and pulp-expelling valve；It is described
Micro-suction pump is connected with vacuum collection airbag.
Simple gas sample collecting device for air further includes counterweight in the exploratory hole on the above-mentioned stratum containing shallow gas；The counterweight is hollow
Column structure, hollow cone structure, solid block structure or solid disk-like structure；The counterweight is hollow column knot
When structure or hollow cone structure, the counterweight is sleeved on funnel；The counterweight is solid block structure or solid disk
When shape structure, the counterweight is arranged on funnel.
Above-mentioned funnel includes slot and the wide opening opposite with slot；The slot of the funnel passes through hose and diaphragm pump phase
Connection；The counterweight is sleeved on funnel by the slot of funnel.
The wide opening of above-mentioned funnel is provided with strainer.
In the exploratory hole on the above-mentioned stratum containing shallow gas simple gas sample collecting device for air further include setting funnel and diaphragm pump it
Between check (non-return) valve.
Simple gas sample collecting device for air further includes setting in micro-suction pump and true in the exploratory hole on the above-mentioned stratum containing shallow gas
Silicone tube between empty set airbag；The micro-suction pump is connected by silicone tube with vacuum collection airbag；On the silicone tube
It is provided with intake valve.
Above-mentioned vacuum collection airbag is one or more.
Simple gas sample collecting device for air further includes being arranged on gas-liquid separation container in the exploratory hole on the above-mentioned stratum containing shallow gas
Vacuum table.
A kind of simple gas sample acquisition method in the exploratory hole on the stratum containing shallow gas, it is characterised in that: the method includes with
Lower step:
1) simple gas sample collecting device for air in the exploratory hole on the stratum containing shallow gas is assembled: funnel and hose is close by pipe collar
Connection, and counterweight is arranged on funnel top；Then successively check (non-return) valve is connected with diaphragm pump by hose, it is ensured that check (non-return) valve is set
It is placed in the input end side of diaphragm pump；Finally diaphragm pump is connect with gas-liquid separation container by hose；Gas-liquid separation container
Top is equipped with vacuum table, and bottom is equipped with pulp-expelling valve, the top of gas-liquid separation container by silicone tube and micro-suction pump with
And vacuum collection airbag is connected；Intake valve is provided on silicone tube；
2) before starting gas sample acquisition, the airtight test of whole device is first carried out；Close pulp-expelling valve and intake valve；It opens
Diaphragm pump will be full of degasification distilled water into the pipeline between gas-liquid separation container in gas-liquid separation container and from funnel；It closes
Diaphragm pump is closed, the pulp-expelling valve of gas-liquid separation lower vessel portion, the degasification distilled water under Gravitative Loads, in gas-liquid separation container are opened
It is discharged, the negative pressure value of gas-liquid separation container top is shown in vacuum table；Water in gas-liquid separation container to be discharged reaches its volume
About half when, close pulp-expelling valve, observe and record the reading of vacuum table, until the reading of vacuum table is walked when not changing
It is rapid 3)；
3) funnel is slowly put into exploratory hole, it is ensured that funnel is not turned on one's side；Under the gravity of counterweight, funnel is slow
Slowly it is placed at the layer position of gas-bearing layer, and is immersed in the hole in exploratory hole below the liquid level of gas-liquid mixed slurries and is no less than 1m；
4) it opens diaphragm pump and controls the revolving speed of diaphragm pump, gas-liquid mixed slurries are passed through funnel and peristaltic pump by diaphragm pump
Enter in gas-liquid separation container, after being filled with gas-liquid mixed slurries in gas-liquid separation container, closes diaphragm pump；By gas-liquid separation container
It stands, until soil particle, water and the gas in gas-liquid mixed slurries are automatically separated and are layered；
5) open intake valve, open micro-suction pump, acquisition is gathered in the gas of gas-liquid separation container top, gas via
Silicone tube enters in vacuum collection airbag, until the sample size of acquisition gas sample is met the requirements.
The above method is after step 5) further include:
6) after to gas sample acquisition, intake valve is closed；Hose is slowly above mentioned, is promoted to funnel higher than in exploratory hole
The liquid levels of gas-liquid mixed slurries be no less than at 1m, open diaphragm pump, the gas-liquid mixed slurries that will remain in pipeline are all taken out
Enter in gas-liquid separation container；The pulp-expelling valve for opening gas-liquid separation container bottom, make mud in gas-liquid separation container and water from
Recast is all discharged with lower, closes diaphragm pump；Funnel is all proposed out of exploratory hole again, is placed in the container equipped with clear water
In, it is again turned on diaphragm pump, by the pipeline of whole system and the cleaning of gas-liquid separation vessel no less than three times, confirmation gas-liquid separation is held
Noresidue mud in device.
The invention has the advantages that
The present invention provides gas sample collecting device for air simple in a kind of exploratory hole on stratum containing shallow gas and method, the device packets
Include funnel, hose, diaphragm pump, gas-liquid separation container, pulp-expelling valve, micro-suction pump and vacuum collection airbag；Funnel passes through hose
It is connected with diaphragm pump；Diaphragm pump is connected by hose with gas-liquid separation container；The top and bottom of gas-liquid separation container
It is respectively arranged with micro-suction pump and pulp-expelling valve；Micro-suction pump is connected with vacuum collection airbag.Leakage of the present invention
Bucket is the input end of the device, and diameter is slightly less than the diameter of exploratory hole, for increasing gas in acquisition input end and exploratory hole hole
The contact area of liquid mixed serum.When counterweight increased on funnel may insure to be put into exploratory hole under hose, funnel is maintained
Posture without deflect, it is also ensured that diaphragm pump extract gas-liquid mixed slurries during, bell mouth is always positioned at
Below the liquid level of gas-liquid mixed slurries in exploratory hole.In the check (non-return) valve that the input end of diaphragm pump is arranged, the gas in extraction is prevented
Liquid mixed serum is flow backwards.Gas-liquid separation container, the soil for being automatically separated in the gas-liquid mixed slurries extracted in gas production process
Particle, water and gas, the air accumulation after making separation are gathered in gas-liquid separation in the top of gas-liquid separation container, soil particle and water
The bottom of container.The present invention is not limited by gas-bearing layer buried depth, is solved and is lacked letter in current geotechnical engineering investigation field
Easy gas recovery facility, gas production process are easily mixed into air or impurity without having representative problem；The device have simple structure,
Definite principle, assembly and disassembly and easy to operate, material are easily obtained, are convenient for the advantages of promoting.
Detailed description of the invention
Fig. 1 is the construction signal of simple gas sample collecting device for air in the exploratory hole on the stratum provided by the present invention containing shallow gas
Figure；
Fig. 2 is the work signal of simple gas sample collecting device for air in the exploratory hole on the stratum provided by the present invention containing shallow gas
Figure；
Wherein:
1- gas-liquid mixed slurries；2- gas-bearing layer；3- capping layer；4- earth's surface, which is ploughed, plants soil layer；5- exploratory hole；6- funnel；7- is soft
Pipe；8- check (non-return) valve；9- counterweight；10- diaphragm pump；11- pulp-expelling valve；12- gas-liquid separation container；13- vacuum table；14- silicone tube；
15- micro-suction pump；16- vacuum collection airbag；17- intake valve.
Specific embodiment
Referring to Fig. 1, the present invention provides simple gas sample collecting device for air in a kind of exploratory hole on stratum containing shallow gas, packet funnels
6, hose 7, check (non-return) valve 8, counterweight 9, diaphragm pump 10, pulp-expelling valve 11, gas-liquid separation container 12, vacuum table 13, silicone tube 14, miniature
Aspiration pump 15, vacuum collection airbag 16 and intake valve 17.
Wherein, funnel 6 is the input end of the device, and diameter is slightly less than the diameter of exploratory hole 5, for increasing acquisition import
The contact area at end and gas-liquid mixed slurries 1 in 5 hole of exploratory hole.Counterweight 9 is set to 6 top of funnel, extracts gas in diaphragm pump 10
It during liquid mixed serum 1, is in close contact with hose 7, it can be ensured that when being put into exploratory hole 5 under hose 7, maintain funnel 6
Posture without deflect, it is also ensured that diaphragm pump 10 extract gas-liquid mixed slurries 1 during, 6 mouthfuls of funnel is always
Below the liquid level of gas-liquid mixed slurries 1 in exploratory hole 5；It is equipped with a check (non-return) valve 8 in the input end of diaphragm pump 10, is prevented
The gas-liquid mixed slurries 1 of extraction are flow backwards.Diaphragm pump 10 is generated with high level gravel in exploratory hole 5 with can handle
The advantages of with the gas-liquid mixed slurries 1 of solid content.
Gas-liquid separation container 12 be used for be automatically separated in the gas-liquid mixed slurries 1 extracted in gas production process soil particle,
Water and gas, the air accumulation after making separation are gathered in gas-liquid separation appearance in the top of gas-liquid separation container 12, soil particle and water
The bottom of device 12；The top of gas-liquid separation container 12 is equipped with a vacuum table 13 and a miniature pumping gas gathering system；Vacuum table
13 for detecting the air-tightness of whole device.
The gas collecting that miniature pumping gas gathering system is used to will accumulate in 12 top of gas-liquid separation container enters vacuum collection airbag
In 16, without being mixed into outside air or impurity；Miniature pumping gas gathering system is by silicone tube 14, intake valve 17, micro-suction pump 15
It is constituted with vacuum collection airbag 16；Micro-suction pump 15 is sent into vacuum collection airbag 16 with the gas extracted in gas-liquid separation container 12
In；The bottom of gas-liquid separation container 12 is provided with a pulp-expelling valve 11, is being gathered in 12 bottom of gas-liquid separation container for being discharged
The soil particle and water in portion, and the muddy water of 12 bottom of gas-liquid separation container is gathered in cleaning whole device；Utilize diaphragm pump
10 extract the gas-liquid mixed slurries 1 in the hole of seismic exploration containing shallow gas 5, and diaphragm pump 10 can handle sludge and mud, and
Not blockage phenomenon.Be automatically separated using gas-liquid separation container 12 soil particle in the gas-liquid mixed slurries 1 extracted, water and
Gas, the air accumulation after separation is at the top of gas-liquid separation container 12, and soil particle and water are then gathered in gas-liquid separation container
12 bottom；A vacuum table 13 is equipped at the top of gas-liquid separation container 12, for detecting whole device and pipeline before gas production
Air-tightness；Miniature pumping gas gathering system, this system is by intake valve 17, micro-suction pump 15, vacuum gas production bag 16 and silicone tube
14 compositions；Using this system, the gas that can will accumulate in 12 top of gas-liquid separation container is adopted in vacuum collection airbag 16, really
Guarantor is collected into pure gas.
Referring to fig. 2, simple gas sample collecting device for air in the exploratory hole on the stratum provided by the present invention containing shallow gas, is using
When, it should it is carried out according to following work step:
1) preparation.Exploratory bore-hole work should be carried out in place containing shallow gas first.Exploratory hole 5 must pass through earth's surface
The capping layer 3 for ploughing plant soil layer 4 and underground shallow layer gas primarily determines shallow gas gassiness into 2 certain depth of gas-bearing layer of shallow gas
Depth location locating for layer 2, and determining in drilling has continual gas to emerge (visually observing in hole has bubble spilling), holds
The continuous time should be greater than 30min, can determine that the exploratory hole 5 is appropriate for the gas sample acquisition of underground shallow layer gas.
2) on-site assembly gas sample collecting device for air.Funnel 6 and hose 7 are closely connected by pipe collar, and counterweight 9 is fixed on
6 top of funnel；Then successively check (non-return) valve 8 and diaphragm pump 10 are connected by hose 7, and gone through, it is ensured that is non-return
Valve 8 is set to the input end side of diaphragm pump 10；Finally diaphragm pump 10 has been connect with gas-liquid separation container 12 by hose 7
Come.The top of gas-liquid separation container 12 is equipped with vacuum table 13, and bottom is equipped with pulp-expelling valve 11, the top of gas-liquid separation container 12
Miniature pumping gas gathering system is also connected with by silicone tube 14.Miniature pumping gas gathering system is by intake valve 17, micro-suction pump 15
It is formed with vacuum collection airbag 16, vacuum collection airbag 16 is connect by silicone tube 14 with micro-suction pump 15, and micro-suction pump 15 is logical
It crosses silicone tube 14 and intake valve 17 is connected with the top of gas-liquid separation container 12.
3) live gas sample acquisition.Before starting gas sample acquisition, the airtight test of whole device should be first carried out.Close pulp-expelling valve
11 and miniature pumping gas gathering system intake valve 17.Open diaphragm pump 10, by gas-liquid separation container 12 and from funnel 6 to
Degasification distilled water is full of in pipeline between gas-liquid separation container 12.Diaphragm pump 10 is closed, 12 lower part of gas-liquid separation container is opened
Pulp-expelling valve 11, under Gravitative Loads, the discharge of degasification distilled water in gas-liquid separation container 12 show that gas-liquid is divided in vacuum table 13
Negative pressure value from 12 top of container.Water in gas-liquid separation container 12 to be discharged reach its volume about half when, close pulp-expelling valve
11, observe and record the reading of vacuum table 13.After 30min, if the reading of vacuum table 13 does not change, illustrate entirely to fill
It sets that air-tightness is good, the gas sample acquisition work of next step can be started.Otherwise, need to go through whole device pipe joint whether
There is leakage, repaired, and repeats the above airtight test process, until after whole device meets air-tightness requirement, Fang Kejin
The gas sample acquisition of row next step works.
4) funnel 6 is slowly put into exploratory hole 5, hose 7 should be kept slowly to transfer in whole process, it is ensured that funnel 6 is not
It turns on one's side.Under the gravity of counterweight 9, funnel 6 is slowly positioned at the layer position of gas-bearing layer 2, and is immersed in exploratory hole 5
1m is no less than in hole below the liquid level of gas-liquid mixed slurries 1.
5) it since the shallow gas of preservation in gas-bearing layer 2 has pressure, constantly discharges into exploratory hole 5, in hole
Slime water formed hole in gas-liquid mixed slurries 1.Diaphragm pump 10 is opened, and controls the revolving speed of diaphragm pump 10, for controlling exploration
The extraction rate of gas-liquid mixed slurries 1 in hole in hole 5 is closed after being filled with gas-liquid mixed slurries 1 in gas-liquid separation container 12
Diaphragm pump 10.Gas-liquid separation container 12 is stood into 15min, due to the weight of soil particle, water and gas in gas-liquid mixed slurries 1
Difference, gas, water and soil particle are automatically separated and are layered.Gas is due to most gently, being gathered in the top of gas-liquid separation container 12, soil
Particle and water are gathered in the bottom of gas-liquid separation container 12.
6) intake valve 17 in miniature pumping gas gathering system is opened, micro-suction pump 15 is opened, acquisition is gathered in gas-liquid point
Gas from 12 top of container, gas enter in vacuum collection airbag 16 via silicone tube 14.When a vacuum collection airbag 16 is adopted completely
After gas sample, micro-suction pump 15 is closed, removes the vacuum collection airbag 16, connects another vacuum collection airbag 16.Repeat this step
Work, until the sample size of acquisition gas sample is met the requirements.
7) after to gas sample acquisition, the intake valve 17 in miniature pumping gas gathering system is closed.Hose 7 is slowly above mentioned,
The liquid level for being promoted to funnel 6 higher than the gas-liquid mixed slurries 1 in exploratory hole 5 is no less than at 1m, is opened diaphragm pump 10, will be remained
It is all pumped into gas-liquid separation container 12 in the gas-liquid mixed slurries 1 in pipeline.Open the plasma discharge of 12 bottom of gas-liquid separation container
Mud and water in gas-liquid separation container 12 is discharged all under Gravitative Loads in valve 11, closes diaphragm pump 10.Again by funnel 6
It is all proposed out of exploratory hole 5, is placed in the container equipped with clear water, is again turned on diaphragm pump 10, by the pipeline of whole system
It is no less than three times with the cleaning of gas-liquid separation vessel 12, in confirmation gas-liquid separation container 12 after noresidue mud, scavenger can be stopped
Make.
8) instrument all parts are removed, collection installs, reuse when to carry out gas sample acquisition next time.
Claims (10)
1. simple gas sample collecting device for air in a kind of exploratory hole on stratum containing shallow gas, it is characterised in that: the stratum containing shallow gas
Exploratory hole in simple gas sample collecting device for air include funnel (6), hose (7), diaphragm pump (10), gas-liquid separation container (12), row
Starch valve (11), micro-suction pump (15) and vacuum collection airbag (16)；The funnel (6) passes through hose (7) and diaphragm pump (10)
It is connected；The diaphragm pump (10) is connected by hose (7) with gas-liquid separation container (12)；The gas-liquid separation container (12)
Top and bottom be respectively arranged with micro-suction pump (15) and pulp-expelling valve (11)；The micro-suction pump (15) and vacuum
Collection airbag (16) is connected.
2. simple gas sample collecting device for air in the exploratory hole on the stratum according to claim 1 containing shallow gas, it is characterised in that: institute
Stating simple gas sample collecting device for air in the exploratory hole on the stratum containing shallow gas further includes counterweight (9)；The counterweight (9) is hollow column
Structure, hollow cone structure, solid block structure or solid disk-like structure；The counterweight (9) is hollow column knot
When structure or hollow cone structure, the counterweight (9) is sleeved on funnel (6)；The counterweight (9) be solid block structure or
When solid disk-like structure, the counterweight (9) is arranged on funnel (6).
3. simple gas sample collecting device for air in the exploratory hole on the stratum according to claim 2 containing shallow gas, it is characterised in that: institute
Stating funnel (6) includes slot and the wide opening opposite with slot；The slot of the funnel (6) passes through hose (7) and diaphragm pump
(10) it is connected；The counterweight (9) is sleeved on funnel (6) by the slot of funnel (6).
4. simple gas sample collecting device for air in the exploratory hole on the stratum according to claim 2 containing shallow gas, it is characterised in that: institute
The wide opening for stating funnel (6) is provided with strainer.
5. simple gas sample collecting device for air in the exploratory hole on the stratum according to claim 1 or 2 or 3 or 4 containing shallow gas, special
Sign is: simple gas sample collecting device for air further includes being arranged in funnel (6) and diaphragm pump in the exploratory hole on the stratum containing shallow gas
(10) check (non-return) valve (8) between.
6. simple gas sample collecting device for air in the exploratory hole on the stratum according to claim 5 containing shallow gas, it is characterised in that: institute
Stating simple gas sample collecting device for air in the exploratory hole on the stratum containing shallow gas further includes being arranged in micro-suction pump (15) and vacuum gas collection
Silicone tube (14) between bag (16)；The micro-suction pump (15) is connected by silicone tube (14) with vacuum collection airbag (16)
It is logical；Intake valve (17) are provided on the silicone tube (14).
7. simple gas sample collecting device for air in the exploratory hole on the stratum according to claim 6 containing shallow gas, it is characterised in that: institute
It is one or more for stating vacuum collection airbag (16).
8. simple gas sample collecting device for air in the exploratory hole on the stratum according to claim 7 containing shallow gas, it is characterised in that: institute
Stating simple gas sample collecting device for air in the exploratory hole on the stratum containing shallow gas further includes the negative pressure being arranged on gas-liquid separation container (12)
Table (13).
9. simple gas sample acquisition method in a kind of exploratory hole on stratum containing shallow gas, it is characterised in that: the method includes following
Step:
1) simple gas sample collecting device for air in the exploratory hole on the stratum containing shallow gas is assembled: funnel (6) and hose (7) is tight by pipe collar
Close connection, and counterweight (9) are arranged on funnel (6) top；Then check (non-return) valve (8) and diaphragm pump (10) are successively passed through into hose
(7) it connects, it is ensured that check (non-return) valve (8) is set to the input end side of diaphragm pump (10)；Finally by diaphragm pump (10) and gas-liquid separation
Container (12) is connected by hose (7)；Vacuum table (13) are installed, bottom is equipped with plasma discharge at the top of gas-liquid separation container (12)
The top of valve (11), gas-liquid separation container (12) passes through silicone tube (14) and micro-suction pump (15) and vacuum collection airbag (16)
It is connected；Intake valve (17) are provided on silicone tube (14)；
2) before starting gas sample acquisition, the airtight test of whole device is first carried out；Close pulp-expelling valve (11) and intake valve (17)；
It opens diaphragm pump (10), it will be in gas-liquid separation container (12) and from funnel (6) to the pipeline between gas-liquid separation container (12)
In be full of degasification distilled water；It closes diaphragm pump (10), opens the pulp-expelling valve (11) of gas-liquid separation container (12) lower part, from recast
Under, the degasification distilled water in gas-liquid separation container (12) is discharged, in vacuum table (13) at the top of display gas-liquid separation container (12)
Negative pressure value；Water in gas-liquid separation container (12) to be discharged reach its volume about half when, close pulp-expelling valve (11), observation simultaneously
The reading of vacuum table (13) is recorded, until the reading of vacuum table (13) carries out step 3) when not changing；
3) funnel (6) is slowly put into exploratory hole (5), it is ensured that funnel (6) is not turned on one's side；Gravity in counterweight (9)
Under, funnel (6) is slowly positioned at the layer position of gas-bearing layer (2), and gas-liquid mixed slurries (1) in the hole being immersed in exploratory hole (5)
Liquid level below no less than 1m；
4) diaphragm pump (10) are opened and controls the revolving speed of diaphragm pump (10), gas-liquid mixed slurries (1) are passed through leakage by diaphragm pump (10)
Bucket (6) and hose (7) are pumped into gas-liquid separation container (12), to be filled with gas-liquid mixed slurries in gas-liquid separation container (12)
(1) it after, closes diaphragm pump (10)；Gas-liquid separation container (12) are stood, until soil particle, water in gas-liquid mixed slurries (1)
It is automatically separated and is layered with gas；
5) intake valve (17) to be opened, opened micro-suction pump (15), acquisition is gathered in the gas at the top of gas-liquid separation container (12),
Gas enters in vacuum collection airbag (16) via silicone tube (14), until the sample size of acquisition gas sample is met the requirements.
10. according to the method described in claim 9, it is characterized by: the method is after step 5) further include:
6) it after to gas sample acquisition, closes intake valve (17)；Hose (7) is slowly above mentioned, make funnel (6) be promoted to be higher than survey
The liquid level of gas-liquid mixed slurries (1) in inspecting hole (5) is no less than at 1m, is opened diaphragm pump (10), the gas that will remain in pipeline
Liquid mixed liquor (1) is all pumped into gas-liquid separation container (12)；The pulp-expelling valve (11) for opening gas-liquid separation container (12) bottom, makes
Mud and water in gas-liquid separation container (12) are all discharged under Gravitative Loads, close diaphragm pump (10)；Again by funnel (6) from
Exploratory hole all proposes in (5), is placed in the container equipped with clear water, is again turned on diaphragm pump (10), by the pipe of whole system
Road and gas-liquid separation vessel (12) cleaning are no less than three times, noresidue mud in confirmation gas-liquid separation container (12).
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