CN103698167A - Portable controllable automatic soil gas quantitative sampling device - Google Patents

Portable controllable automatic soil gas quantitative sampling device Download PDF

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Publication number
CN103698167A
CN103698167A CN201410003865.3A CN201410003865A CN103698167A CN 103698167 A CN103698167 A CN 103698167A CN 201410003865 A CN201410003865 A CN 201410003865A CN 103698167 A CN103698167 A CN 103698167A
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China
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sampling
drill bit
pipe
gas
impact tube
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CN201410003865.3A
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Chinese (zh)
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CN103698167B (en
Inventor
杨青
孙从军
陈小华
张辉
季兆友
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上海市环境科学研究院
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Abstract

The invention discloses a portable controllable automatic soil gas quantitative sampling device which comprises a drill bit part (1) and a gas sampling part (2). The device is characterized in that the drill bit part (1) comprises a drill bit tip (101); a clamping tooth (101a) is arranged on the drill bit tip (101); a drill bit connecting part (102) is arranged above the drill bit tip (101); a sampling air inlet (102a) is formed in the outer side surface of the drill bit connecting part (102); the sampling air inlet (102a) is communicated with a connecting tube mounting hole (103a) in the drill bit tail part (103) through a channel inside the drill bit; one end of a sampling connecting tube (104) is inserted into the connecting tube mounting hole (103a) in the drill bit tail part (103); the sampling connecting tube (104) penetrates through an impact tube (105). The invention provides the portable controllable automatic soil gas quantitative sampling device which is capable of further acquiring a gas sample deep in soil, the sampling speed and the gas amount are automatically controlled so as to acquire the gas sample which meets the practical situation, as the drill bit can be recycled, the cost is saved, the acquisition efficiency is improved, and the whole device is simple in structure and convenient to install.

Description

Portable controlled robotization soil gas quantitative sampling device

Technical field

The present invention relates to field of environment engineering technology, specifically just relate to descend over the ground soil pollution situation to carry out the portable controlled robotization soil gas quantitative sampling device gathering for soil gas in fact-finding process.

Background technology

Along with scientific and technological development, the fast development of all types of industries manufacturing industry, is accompanied by enterprise business and the soil and groundwater pollution problem that produces has become the important environmental problem that the world today faces.Wherein, the oil product storage such as refuelling station, storage tank farm place is the source of oil pollution in typical soil.In this class oils organic contamination place soil, contain and send out organic matter VOCs and semi-volatile organic matter SVOCs, when oil product generation seepage, VOCs in these pollutants and SVOCs component will evaporate in soil gas, formation is mixed with the soil gas of pollutant, thereby to gather soil gas sample and measure volatile organic matter be the fast investigation method whether a kind of quick judgement investigation place leakage pollution occurs.

The gathering-device of a kind of soil gas of Chinese patent 2011159118 designs, for the trace gas of the following 10cm of upper soll layer, collect and measure, this device is directly connected with tubulose abutment ring one end by the circular cone shape air chamber body lower port without bottom surface connecting successively, the tubulose stationary pipes upper end mouth of pipe is sleeve type with the other end of tubulose abutment ring and is connected, and be embedded in the inclined-plane rubber seal being arranged on tubulose abutment ring outer wall, and then assurance impermeability, the lower end mouth of pipe of tubulose stationary pipes is edge of a knife shape, is convenient to directly insert soil.

Existing another kind of buffer type soil gas sampling device, for greenhouse gases N in upper soll layer 3-5cm 2o, CO 2and CH 4sampling, this installs by syringe, valve, bleeding point, the conduit of bleeding, casing, air bag, water sealed tank, pedestal forms, because it has set up air bag on casing, therefore in the process of whole storage sampling, the air pressure of sampling process raising middle flask inside and outside remains equilibrium state after cushion by air bag and regulating, and prevented the gas leakage that casing is outside or inside, kept the quality of the interior inventory of gas of casing; Also overcome the downtrod difficult problem of soil gas Spontaneous release, improved the reliability that soil is discharged to eudiometry data simultaneously.

More than the sampling of the soil gas of research is and artificially collects, not high for the tolerance of sampling and the control accuracy of sample rate, and different when sampling depth and contaminated sites investigation, soil gas sampling while investigating for contaminated site generally will be collected gas below the 50cm of top layer, and the tolerance to sampling, sample rate has certain requirement, so prior art scheme is not suitable for the contaminated sites soil gas sampling in when investigation.

And the existing gas sampling technology that is applicable to general atmosphere, as vacuum gas Sampling techniques, because its technology is comparatively ripe, can control to a certain extent amount and the sample rate of sampling, general its principle of vacuum sampling box is to use vacuum pump that air in casing is extracted out and formed negative pressure, sample gas enters airbag by thief hatch, observes the occupied state of airbag by viewing window, controls sampling aeration quantity and can not surpass 80% of sampler bag maximum volume.Therefore, now atmosphere acquisition technique is used for to soil gas collection, but existing gas vacuum sampling apparatus does not have supporting boring and gas collector, while gathering for soil gas, can only separately join other borings and gathering-device temporarily, itself also exists some defects general sampling box, and is not exclusively applicable to soil gas sampling.Subject matter is as follows:

(1) before sampling, the gas in the gentle bag of gas collection pipeline can not be discharged, cause sample impure, be vulnerable to the impact of interference gas;

(2) while sampling, after sampling box closure, only with viewing window, inner without illumination, cause being difficult to observe airbag aeration quantity;

(3) while sampling, sample rate can not be controlled, and causes the sample gathering not meet the requirement of soil gas collection to sample rate;

(4), while sampling, the aeration quantity of airbag only judges with visual inspection, causes the airbag aeration quantity of front and back collection inconsistent;

(5) after having sampled, for the drill bit of holing, can not reclaim, the cost that causes sampling is higher.

Summary of the invention

The object of the invention is to gather degree for existing soil gas quantitative sampling plant automation not high, the soil gas degree of depth collecting is not dark, and collect the technological deficiency that gas and actual state exist larger error, a kind of portable soil gasometry sampling apparatus is provided, can further collect the gaseous sample of depth of soils, thereby control sample rate and gas flow and collect the gaseous sample compound with real conditions, improve the efficiency gathering.

Technical scheme

In order to realize above-mentioned technical purpose, the present invention designs a kind of portable controlled robotization soil gas quantitative sampling device, comprise bit head and gas sampling portion, it is characterized in that: described bit head comprises drill bit, drill bit is provided with latch, drill bit top is drill bit connecting portion, drill bit connecting portion lateral surface is provided with sampling air admission hole, sampling air admission hole connects by drill bit internal duct and drill bit afterbody connecting pipe mounting hole, sampling connecting pipe one end is inserted and is installed in drill bit afterbody connecting pipe mounting hole, sampling connecting pipe is through impact tube, impact tube one end is contained on drill bit connecting portion, the impact tube other end is equipped with the airtight assembly for sealing, sampling connecting pipe is connected to gas sampling portion through after impact tube,

Described gas sampling portion comprises sampling box, sampler bag is housed in sampling box, on sampling box, be provided with sampler bag correspondence position the secondary device of cutting off the electricity supply, sampling box is equipped with two-position five-way gas circuit switching controls valve outward, sampling connecting pipe is connected to the air intake opening of two-position five-way gas circuit switching controls valve through the one end after impact tube, the exhausr port of two-position five-way gas circuit switching controls valve is connected on vacuum pump by exhaust connection, sampler bag is connected to the thief hatch of two-position five-way gas circuit switching controls valve by sampling connecting pipe, sampling connecting pipe one end is contained in the thief hatch of two-position five-way gas circuit switching controls valve, the other end stretches in the sampler bag of sealing, sampling box is provided with negative pressure hole, negative pressure connecting pipe is housed on negative pressure hole, negative pressure connecting pipe is connected on vacuum pump, vacuum pump has power-supply controller of electric that power supply is provided, power-supply controller of electric is controlled and is opened and closed by the secondary device 202 of cutting off the electricity supply,

Described sampling box is provided with constant voltage regulator, and constant voltage regulator is contained on sampling box tank wall.

Beneficial effect

The invention provides a kind of portable soil gasometry sampling apparatus, can further collect the gaseous sample of depth of soils, thereby realize, sample rate is controlled in robotization and gas flow collects the gaseous sample compound with real conditions, drill bit is recyclable cost-saving, improve the efficiency gathering, whole apparatus structure is simple, easy for installation.

Accompanying drawing explanation

Accompanying drawing 1 is that in the present invention, sampling box is opened rear annexation schematic diagram.

Accompanying drawing 2 is bit head structural representations in the present invention.

Accompanying drawing 3 is airtight modular construction schematic diagram in the present invention.

Accompanying drawing 4 is punching groove tubular construction schematic diagram in the present invention.

Accompanying drawing 5 is main apparent direction structural representations of sampling box in the present invention.

Embodiment

Below in conjunction with drawings and Examples, the present invention will be further described.

Embodiment

As shown in accompanying drawing 1~5, a kind of portable controlled robotization soil gas quantitative sampling device, comprise bit head 1 and gas sampling portion 2, it is characterized in that: described bit head 1 comprises drill bit 101, drill bit 101 is provided with latch 101a, drill bit 101 tops are drill bit connecting portions 102, drill bit connecting portion 102 lateral surfaces are provided with sampling air admission hole 102a, sampling air admission hole 102a connects by drill bit internal duct and drill bit afterbody 103 connecting pipe mounting hole 103a, sampling connecting pipe 104 one end are inserted and are installed in drill bit afterbody 103 connecting pipe mounting hole 103a, sampling connecting pipe 104 is through impact tube 105, impact tube 105 one end are contained on drill bit connecting portion 102, impact tube 105 other ends are equipped with the airtight assembly 106 for sealing, sampling connecting pipe 104 is connected to gas sampling portion 2 through after impact tube 105,

Described gas sampling portion 2 comprises sampling box 201, sampler bag 201a is housed in sampling box 201, on sampling box 201, be provided with sampler bag 201a correspondence position the secondary device 202 of cutting off the electricity supply, the outer two-position five-way gas circuit switching controls valve 203 that is equipped with of sampling box 201, sampling connecting pipe 104 is connected to the air intake opening 203a of two-position five-way gas circuit switching controls valve 203 through the one end after impact tube 105, the exhausr port 203b of two-position five-way gas circuit switching controls valve 203 is connected on vacuum pump 204 by exhaust connection, sampler bag 201a is connected to the thief hatch 203c of two-position five-way gas circuit switching controls valve 203 by sampling connecting pipe, sampling connecting pipe one end is contained in the thief hatch 203c of two-position five-way gas circuit switching controls valve 203, the other end stretches in the sampler bag 201a of sealing, sampling box 201 is provided with negative pressure hole 201b, negative pressure connecting pipe is housed on negative pressure hole 201b, negative pressure connecting pipe is connected on vacuum pump 204, vacuum pump 204 has power-supply controller of electric 205 that power supply is provided, power-supply controller of electric 205 is controlled and is opened and closed by the secondary device 202 of cutting off the electricity supply,

Described sampling box 201 is provided with constant voltage regulator 206, and constant voltage regulator 206 is contained on sampling box 201 tank walls.

Further, described drill bit connecting portion 102 is threaded with impact tube 105, and junction is positioned at sampling air admission hole 102a below, and drill bit connecting portion 102 is provided with impact tube guide part 102b.

Further, described airtight assembly 106 comprises airtight conversion head 106a, on airtight conversion head 106a, is connected with sealing-plug 106b, and airtight conversion head 106a is contained on impact tube 105 terminations, and sampling connecting pipe 104 is through airtight conversion head 106a and sealing-plug 106b.

Further, described impact tube 105 can also be connected with impact barrel 107, impacts barrel 107 one end and is enclosed within outside impact tube 105, and reciprocating drill inserts and impacts in barrel 107 other ends, and sampling connecting pipe 104 stopple coupon via hole 107a from impact barrel 107 passes.

Further, in described sampling box 201, be provided with light fixture 3.

Further, described sampling is provided with view window 208 for 201 casees.

Further, described impact tube 105 is steel pipe.

Further, described sampling connecting pipe, sampling connecting pipe and negative pressure connecting pipe are all PE flexible pipe.

The course of work of the present invention is: the first step is to break ground hole and be pressed into the drill bit stage: use reciprocating drill to break earth's surface hard concrete layer, boring.Then bit head 1 is connected with sampling connecting pipe 104 one end, sampling connecting pipe 104 is through impact tube 105, and the hole from impact barrel 107 passes bit head 1 and impact barrel 107 screws by screw thread, then use reciprocating drill to exert pressure at impact barrel 107 downwards, be pressed in the hole of having got bit head 1 is vertical, until below ground 0.5-1m depths (guaranteeing on water table), after completing, take off and impact barrel 107, after taking off impact barrel 107, replace and be mounted to airtight assembly 106, sampling connecting pipe 104 is connected with two-position five-way air way switch valve door 203 through airtight assembly 106.

Second step is soil gas acquisition phase: according to Fig. 1, equipment pipe wiring is connected, during sampling, first with hand or by spanner dextrorotation impact tube 105, gradually by bit head 1, because the effect of latch 101a can be fixed on drill bit in soil, rotating steel tube can revolve drill bit the de-impact tube 105 that departs from; Then impact tube 105 is upwards mentioned to a bit of distance, soil gas enters sampling connecting pipe 104 by air intake opening.

Sample sampler bag 201a bag is connected on the interior sample pipe of sampling box 201, sample sampler bag 201a center lies in secondary device 206 lower ends of cutting off the electricity supply, can be according to airbag size, regulate the height at secondary device 206 places of cutting off the electricity supply, under the state of opening at vacuum tank, press the shift knob on the power-supply controller of electric 205 of lower box side, case intraoral illumination equipment 3 starts.By the chest fastening of closing.Chest electric wire is switched on power, and vacuum pump 204 power cables are connected on the vacuum-pump power supply socket of power-supply controller of electric 205, and pump is in closed condition.Two-position five-way gas circuit switching controls valve 203 is first dialled at negative pressure mouth.Press the start button on vacuum pump 204, vacuum pump 204 is started working.In sampling box 201, be evacuated, after cleaning sample sampler bag 201a and the pipeline that is connected soil, waiting for the several seconds, two-position five-way gas circuit switching controls valve 203 be allocated to soil gas injection port simultaneously.The interior sample sampler bag of sampling box 201 201a formally starts sample introduction, and the speed of sample introduction can be controlled the sampling time by regulating constant voltage regulator 207.In sample introduction process, operating personnel can also see through the gas sampling situation in the view window 208 real time inspection casees above casing.Once sample sampler bag 201a sample introduction, be full of, sample sampler bag 201a withstands the secondary device 206 of cutting off the electricity supply of casing top, and the secondary of cutting off the electricity supply device 206 is by signal feedback to power-supply controller of electric 205, and vacuum pump 1204 quits work, and case intraoral illumination equipment 3 is also closed.Open sample sampler bag 201a, close immediately the sack valve of pedotheque sampler bag 201a, and take out soil gas sample sack, complete a soil gas sample collection.

The 3rd step is drill bit recovery stage: first sampling connecting pipe 104 is extracted from two-position five-way gas circuit switching controls valve 203, then with hand or by spanner, continue to pin impact tube 105 downwards, and be rotated counterclockwise impact tube 105, until screw underground bit head 1, finally impact tube 105 is extracted to ground together with bit head 1, complete drill bit and reclaim.

The invention provides a kind of portable soil gasometry sampling apparatus, can further collect the gaseous sample of depth of soils, thereby realize, sample rate is controlled in robotization and gas flow collects the gaseous sample compound with real conditions, drill bit is recyclable cost-saving, improve the efficiency gathering, whole apparatus structure is simple, easy for installation.

Claims (8)

1. a portable controlled robotization soil gas quantitative sampling device, comprise bit head (1) and gas sampling portion (2), it is characterized in that: described bit head (1) comprises drill bit (101), drill bit (101) is provided with latch (101a), drill bit (101) top is drill bit connecting portion (102), drill bit connecting portion (102) lateral surface is provided with sampling air admission hole (102a), sampling air admission hole (102a) connects by drill bit internal duct and drill bit afterbody (103) connecting pipe mounting hole (103a), sampling connecting pipe (104) one end is inserted and is installed in drill bit afterbody (103) connecting pipe mounting hole (103a), sampling connecting pipe (104) is through impact tube (105), impact tube (105) one end is contained on drill bit connecting portion (102), impact tube (105) other end is equipped with the airtight assembly (106) for sealing, sampling connecting pipe (104) is connected to gas sampling portion (2) through after impact tube (105),
Described gas sampling portion (2) comprises sampling box (201), sampler bag (201a) is housed in sampling box (201), sampling box (201) is gone up and sampler bag (201a) correspondence position is provided with the secondary device (202) of cutting off the electricity supply, the outer two-position five-way gas circuit switching controls valve (203) that is equipped with of sampling box (201), sampling connecting pipe (104) is connected to the air intake opening (203a) of two-position five-way gas circuit switching controls valve (203) through the one end after impact tube (105), the exhausr port (203b) of two-position five-way gas circuit switching controls valve (203) is connected on vacuum pump (204) by exhaust connection, sampler bag (201a) is connected to the thief hatch (203c) of two-position five-way gas circuit switching controls valve (203) by sampling connecting pipe, sampling connecting pipe one end is contained in the thief hatch (203c) of two-position five-way gas circuit switching controls valve (203), the other end stretches in the sampler bag (201a) of sealing, sampling box (201) is provided with negative pressure hole (201b), on negative pressure hole (201b), negative pressure connecting pipe is housed, negative pressure connecting pipe is connected on vacuum pump (204), vacuum pump (204) has power-supply controller of electric (205) that power supply is provided, power-supply controller of electric (205) is controlled and is opened and closed by the secondary device (202) of cutting off the electricity supply,
Described sampling box (201) is provided with constant voltage regulator (206), and constant voltage regulator (206) is contained on sampling box (201) tank wall.
2. a kind of portable controlled robotization soil gas quantitative sampling device as claimed in claim 1, it is characterized in that: described drill bit connecting portion (102) is threaded with impact tube (105), junction is positioned at sampling air admission hole (102a) below, and drill bit connecting portion (102) is provided with impact tube guide part (102b).
3. a kind of portable controlled robotization soil gas quantitative sampling device as claimed in claim 1, it is characterized in that: described airtight assembly (106) comprises airtight conversion head (106a), on airtight conversion head (106a), be connected with sealing-plug (106b), airtight conversion head (106a) is contained on impact tube (105) termination, and sampling connecting pipe (104) is through airtight conversion head (106a) and sealing-plug (106b).
4. a kind of portable controlled robotization soil gas quantitative sampling device as claimed in claim 1, it is characterized in that: described impact tube (105) is connected with impact barrel (107), impacting barrel (107) one end is enclosed within outside impact tube (105), reciprocating drill inserts and impacts in barrel (107) other end, and sampling connecting pipe (104) stopple coupon via hole (107a) from impacting barrel (107) passes.
5. a kind of portable controlled robotization soil gas quantitative sampling device as claimed in claim 1, is characterized in that: in described sampling box (201), be provided with light fixture (3).
6. a kind of portable controlled robotization soil gas quantitative sampling device as claimed in claim 1, is characterized in that: described sampling (201) case is provided with view window (207).
7. a kind of portable controlled robotization soil gas quantitative sampling device as claimed in claim 1, is characterized in that: described impact tube (105) is steel pipe.
8. a kind of portable controlled robotization soil gas quantitative sampling device as claimed in claim 1, is characterized in that: described sampling connecting pipe, sampling connecting pipe and negative pressure connecting pipe are all PE flexible pipe.
CN201410003865.3A 2014-01-04 2014-01-04 Portable controlled automation soil gas quantitative sampling device CN103698167B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104316367A (en) * 2014-10-09 2015-01-28 西安近代化学研究所 Gas collecting device
CN104316368A (en) * 2014-11-12 2015-01-28 环境保护部南京环境科学研究所 Automatic sampler and sampling method for soil profile gas of refuse landfill
CN104330287A (en) * 2014-11-03 2015-02-04 南京白云化工环境监测有限公司 Anti-pollution soil gas sampling device
CN104502158A (en) * 2014-11-21 2015-04-08 北京林业大学 Soil gas sampling system
CN106198109A (en) * 2016-07-20 2016-12-07 河南理工大学 A kind of bauxite mineral exploration sampler
CN109470417A (en) * 2019-01-09 2019-03-15 青岛泰斯迈仪器设备有限公司 A kind of leak hunting method of vacuum sample normal pressure detection
CN109470417B (en) * 2019-01-09 2020-07-07 青岛泰斯迈仪器设备有限公司 Leak detection method for vacuum sampling normal pressure detection

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CN102288457A (en) * 2011-05-11 2011-12-21 北京市环境保护科学研究院 Portable system for collecting volatile gas in soil and collecting method thereof
CN102353562A (en) * 2011-07-14 2012-02-15 福建师范大学 Gas collector for collecting soil gas
CN102879235A (en) * 2011-07-15 2013-01-16 敦煌研究院 Soil gas collector for alternately frequent low temperature, drought, wet, freezing and thawing soil
CN102879231A (en) * 2012-09-04 2013-01-16 中国科学院东北地理与农业生态研究所 Greenhouse gas collection device for soil at different depths, and in-situ observation method
CN103954481A (en) * 2014-04-08 2014-07-30 上海基量标准气体有限公司 Sampling device and method of negative pressure gas sample

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US4452091A (en) * 1982-06-23 1984-06-05 Cities Service Company Soil gas probe
US5150622A (en) * 1991-02-19 1992-09-29 Vollweiler Arthur R Vapor probe for soil gas vapor sampler
CN102288457A (en) * 2011-05-11 2011-12-21 北京市环境保护科学研究院 Portable system for collecting volatile gas in soil and collecting method thereof
CN102252876A (en) * 2011-06-13 2011-11-23 浙江省农业科学院 Buffer type soil gas sampling device
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104316367A (en) * 2014-10-09 2015-01-28 西安近代化学研究所 Gas collecting device
CN104316367B (en) * 2014-10-09 2017-04-12 西安近代化学研究所 Device for collecting gas in plug type airtight container
CN104330287A (en) * 2014-11-03 2015-02-04 南京白云化工环境监测有限公司 Anti-pollution soil gas sampling device
CN104316368A (en) * 2014-11-12 2015-01-28 环境保护部南京环境科学研究所 Automatic sampler and sampling method for soil profile gas of refuse landfill
CN104502158A (en) * 2014-11-21 2015-04-08 北京林业大学 Soil gas sampling system
CN106198109A (en) * 2016-07-20 2016-12-07 河南理工大学 A kind of bauxite mineral exploration sampler
CN109470417A (en) * 2019-01-09 2019-03-15 青岛泰斯迈仪器设备有限公司 A kind of leak hunting method of vacuum sample normal pressure detection
CN109470417B (en) * 2019-01-09 2020-07-07 青岛泰斯迈仪器设备有限公司 Leak detection method for vacuum sampling normal pressure detection

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