CN105699136A - Unsaturated zone gas multi-point instant and synchronous sampling device for polluted soil column test - Google Patents
Unsaturated zone gas multi-point instant and synchronous sampling device for polluted soil column test Download PDFInfo
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- CN105699136A CN105699136A CN201610060848.2A CN201610060848A CN105699136A CN 105699136 A CN105699136 A CN 105699136A CN 201610060848 A CN201610060848 A CN 201610060848A CN 105699136 A CN105699136 A CN 105699136A
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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
- G01N1/24—Suction devices
Abstract
The invention relates to an unsaturated zone gas multi-point instant and synchronous sampling device for a polluted soil column test. The device comprises a suction barrel, a three-directional needle head system and a linking plate, wherein the suction barrel comprises a piston shank (1), an empty barrel (3), a piston shaft (2) positioned between the piston shank (1) and the empty barrel (3), a piston (4) which is positioned at the bottom of the empty barrel (3) and is connected with the piston shaft (2), and a nipple plate (5) positioned at the periphery of the bottom of the empty barrel (3); and the three-directional needle head system comprises an activated carbon column (6), a joint switching pipe (7) connected with the activated carbon column (6), an exhaust valve (8) connected with the joint switching pipe (7), a four-directional joint (9) connected with the exhaust valve (8), and a gas collection valve (13) connected with the four-directional joint (9) from top to bottom. A three-directional sampling needle and the linking plate are used for implementing a linking gas sampling device applicable to an indoor soil test for organic polluted soil.
Description
Technical field
The present invention relates to a kind of gas collecting device for soil test, particularly relate to a kind of gas linkage harvester for organic contamination soil laboratory soil test。
Background technology
In recent years, along with Chinese Industrialization process, Development of China's Urbanization accelerate advance and the adjustment of national industry layout, a large amount of industry are moved out main city zone, and the industrial pollution place carried over needs through processing redevelopment for human settlement。In these industrial pollution places, Organic Pollution occupies sizable ratio, for instance, underground oil storage facility and Systems for Oil Pipeline Leakage cause organic compound that soil, subsoil water are polluted。Organic pollutant is the industrial pollutants that pollution range is wide, the extent of injury is big, currently suffers from the great attention of people for a long time, and substantial amounts of Organic substance enters in soil environment via various approach, such as polycyclic aromatic hydrocarbon, Nitrobenzol, chlorobenzene etc.。
In organic pollution in entering soil, volatile organic contaminant and semi-volatile organic matter are important ingredients。Volatile organic matter is called for short VOCs (VolatileOrganicCompounds), is the general designation of a class organic compound, but in the world that the definition of VOCs is not yet unified at present, and various countries are different with the starting point organized according to control and have different definition。It is said that in general, VOCs refers to the saturated vapor pressure organic compound more than 7lPa when boiling point is lower than 260 DEG C or room temperature at ambient pressure。Volatile organic contaminant in soil enters in soil environment, can exist with free state, ADSORPTION STATE, the dissolved and gaseous form。Wherein, the organic pollution of gaseous state causes larger range of pollution by processes such as volatilizations, enters in air or building, and atmosphere pollution impairs one's health。According to the volatile feature of volatile organic contaminant, aeration (AirSparging, AS), gas phase extracting (SoilVaporExtraction, etc. SVE) volatile organic matter is discharged by vapor form by forcing the mode of airflow field in soil, extensive use in the reparation of actual organic contamination soil。Therefore, in the research repair process Polluted Soil such as the organic contamination organic distribution of air in soil state and AS and SVE, the changes in distribution rule of gaseous organic substance is significant。
Existing gas sampling technologies is mostly atmospheric gas Sampling techniques and soil in-situ Sampling techniques, utilizes vacuum sampling principle to carry out gas sampling。Vacuum sampling method utilizes vacuum pump to extract sampling room air out formation negative pressure, and sample gas is entered the gas collecting apparatus such as airbag by thief hatch, is observed the occupied state of gas collecting apparatus by window, controls sampling aeration quantity。Owing to the device of soil in-situ gas sampling occupies the reasons such as volume is big, single acquisition gas sample capacity is big, it is impossible to apply it on the gas collecting of Environmental Geotechnical laboratory test。Condition according to simulation place is different with test objective, form and the content of organic contamination soil laboratory soil test are varied, the quality and quantity of gas collecting be it is also proposed lot of challenges, specifically how can efficiently, quickly, synchronously gather the gaseous sample of each sample point in process of the test。Therefore, research is significant for the Multipoint synchronous instant gas harvester of organic contamination soil laboratory soil test。
Summary of the invention
Technical problem: gather air in soil body and be analyzed being a kind of conventional analysis test method in Environmental Geotechnical test, existing organic contamination soil soil test gas sampling assembly is both for on-the-spot test, there is no the gas sample collecting device for air of the batch synchronization for laboratory soil test at present。According to conventional volatility organic contamination soil laboratory soil test (such as, volatile organic contaminant carrying model trial, aeration model test and gas phase extracting model test etc.) requirement, invent a kind of gas linkage sampling apparatus for volatility organic contamination soil laboratory soil test, be an important job for multi-point transient synchronization gas sampling provides a kind of device in indoor environment soil test soil。
Summary of the invention: for solving above-mentioned technical problem, the present invention provides a kind of Polluted Soil column test unsaturation band gas multi-point transient synchronized sampling unit, and this device includes pump bowl, three-dimensional needle system, linkage board；
Pump bowl includes piston handle, empty cylinder, piston shaft between this piston handle and empty cylinder, is positioned at the piston being connected bottom sky cylinder and with piston shaft and the nipple plate being positioned at periphery bottom sky cylinder；
Three-dimensional needle system includes the gas collection bag that the gas collection pin that the gas collection valve that the four-way joint that the air bleeding valve that the joint crossover connection that activated-charcoal column is connected with activated-charcoal column is connected with joint crossover connection is connected with air bleeding valve is connected with four-way joint is connected with gas collection valve is connected with gas collection pin from top to bottom successively；It is covered in the waterproof ventilated membrane of four-way joint side, the gas production valve being positioned at four-way joint side and gas production pin；
Linkage board bottom the empty cylinder that the empty cylinder top linkage board that linkage board includes piston handle linkage board and piston handle linkage board is oppositely arranged, the handle being positioned on piston handle linkage board, the bolt laying respectively at sky cylinder top linkage board and piston handle linkage board and empty cylinder top linkage board are oppositely arranged, bottom this sky cylinder, linkage board is connected with the opposite side of four-way joint and abuts against with the bottom of sky cylinder。
Preferably, described four-way joint connects activated carbon tube, waterproof ventilated membrane and gas production pin, gas collection pin and empty cylinder respectively through joint crossover connection；
Wherein, air bleeding valve controls activated carbon tube, adopts Air Valve Control gas production pin, gas collection valve domination set air tube。
Beneficial effect:
Soil mesopore gas composition analysis is a kind of important research method of Environmental Geotechnical test, and existing analysis method and analytical equipment lay particular emphasis on original position gas composition analysis more。Due to original position gas collecting device take up room greatly, complicated operation, collected specimens volume big, it is impossible to apply it in Environmental Geotechnical laboratory test。The present invention devises a kind of for indoor environment soil test gas collecting device, this device simple structure, easy to operate, realize gathering, by the switch combination of multidirectional valve, the gaseous sample that purity is higher, and realize different measuring points place carries out real-time synchronization linkage gas production by linkage board。The present invention disclosure satisfy that the requirement of most conventional Environmental Geotechnical laboratory test gas sample acquisition。
Accompanying drawing explanation
Fig. 1 is the structural representation of single-point gas sample collecting device for air in apparatus of the present invention,
Linkage board 20 and test soil sample 21 bottom piston handle 1, piston shaft 2, empty cylinder 3, piston 4 and nipple plate 5, activated-charcoal column 6, joint crossover connection 7, air bleeding valve 8, four-way joint 9, waterproof ventilated membrane 10, gas production valve 11, gas production pin 12, gas collection valve 13, gas collection pin 14 and gas collection bag 15, piston handle linkage board 16, empty cylinder top linkage board 17, handle 18, bolt 19, empty cylinder。Wherein, sample soil sample is placed in column soil sample chamber。
Fig. 2 is empty cylinder top linkage board 17 schematic diagram made according to sampling point distributions, and the layout of its Hole is made according to the spatial distribution of sampled point。Similar, according to sampled point spatial distribution, makes linkage board 20 bottom corresponding piston handle linkage board 16 and empty cylinder。By linkage board 20 bottom piston handle linkage board 16, empty cylinder top linkage board 17 and empty cylinder, single-point gas sample collecting device for air is assembled in instrument, constitutes the gas linkage harvester of organic contamination soil laboratory soil test。
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described。
The present invention relates to a kind of Polluted Soil column test unsaturation band gas multi-point transient synchronized sampling unit, this device is mainly made up of syringe of bleeding, three-dimensional needle system, linkage board。Pump bowl is mainly made up of the rustless steel sky cylinder of high-strength light, piston, piston shaft and piston handle。Three-dimensional needle system is mainly made up of communication chamber, syringe needle connecting tube, control valve, sampling syringe needle, gas treatment and gas collector。Linkage board is mainly made up of linkage board, pump bowl top linkage board and piston rod gangbar bottom pump bowl。Existing organic contamination soil soil test gas sampling assembly is both for on-the-spot test, and current open source literature there is no the device gathering gas phase sample for unsaturation multiple spot temporal synchronization in soil-column test process。The present invention utilizes three-dimensional sampling probe and linkage board to achieve a kind of gas linkage sampling apparatus suitable in organic contamination soil laboratory soil test。This device space deployment scenarios according to measuring point, makes corresponding linkage board and is assembled by one point gas harvester, it is possible to measuring point temporal synchronization multiple in soil sample are gathered gas sample。
The gas linkage harvester for organic contamination soil laboratory soil test of the present invention, including pump bowl, three-dimensional needle system, linkage board。Wherein pump bowl is made up of piston handle, piston shaft, empty cylinder, piston and nipple plate。Three-dimensional needle system is made up of activated carbon tube, joint crossover connection, air bleeding valve, four-way joint, waterproof ventilated membrane, gas production valve, gas production pin, gas collection valve, gas collection pin and gas collection bag。Linkage board is made up of linkage board bottom piston handle linkage board, bolt, empty cylinder top linkage board and empty cylinder。
In the present invention, waterproof ventilated membrane is attached to air inlet place, for avoiding the outflow of gas sampling process mesopore liquid。Connect empty cylinder, gas production pin, activated carbon tube and gas collection pin by four-way joint, control gas production valve, air bleeding valve and the switching sequence of gas collection valve and the propelling of piston rod and pull-out, it is achieved collect the original position gaseous sample that purity is higher。Meanwhile, utilize linkage board to be integrated by the gas producing device at different measuring points place and realize real-time synchronization linkage gas production。
Polluted Soil column test unsaturation band gas multi-point transient synchronized sampling unit provided by the invention, it is characterised in that this device includes pump bowl, three-dimensional needle system, linkage board；
Pump bowl includes piston handle 1, empty cylinder 3, piston shaft 2 between this piston handle 1 and empty cylinder 3, is positioned at the piston 4 being connected bottom sky cylinder 3 and with piston shaft 2 and the nipple plate 5 being positioned at periphery bottom sky cylinder 3；
Three-dimensional needle system includes the gas collection bag 15 that the gas collection pin 14 that the gas collection valve 13 that the four-way joint 9 that the air bleeding valve 8 that the joint crossover connection 7 that activated-charcoal column 6 is connected with activated-charcoal column 6 is connected with joint crossover connection 7 is connected with air bleeding valve 8 is connected with four-way joint 9 is connected with gas collection valve 13 is connected with gas collection pin 14 from top to bottom successively；It is covered in the waterproof ventilated membrane 10 of four-way joint 9 side, the gas production valve 11 being positioned at four-way joint 9 side and gas production pin 12；
Linkage board 20 bottom the empty cylinder that the empty cylinder top linkage board 17 that linkage board includes piston handle linkage board 16 and piston handle linkage board 16 is oppositely arranged, the handle 18 being positioned on piston handle linkage board 16, the bolt 19 laying respectively at sky cylinder top linkage board 17 and piston handle linkage board 16 and empty cylinder top linkage board 17 are oppositely arranged, bottom this sky cylinder, linkage board 20 is connected with the opposite side of four-way joint 9 and abuts against with the bottom of sky cylinder 3。
Described four-way joint 9 connects activated carbon tube 6, waterproof ventilated membrane 10 and gas production pin 12, gas collection pin 14 and empty cylinder 3 respectively through joint crossover connection；
Wherein, air bleeding valve 8 controls activated carbon tube 6, and gas production valve 11 controls gas production pin 12, gas collection valve 13 domination set air tube 14。
The diameter of piston handle 1 is 2cm, and thickness is 0.3cm, and material is rustless steel。The length of piston shaft 2 is 7cm, and diameter is 0.3cm, and material is rustless steel。Empty cylinder 3 internal diameter is 1.5cm, and wall thickness is 0.25cm, and length is 5cm, and material is rustless steel。Piston 4 diameter is 1.5cm, and thickness is 1cm, and material is rubber。Nipple plate 5 thickness is 0.3cm, is lived by sky cylinder 3 tight by being tightly connected, and the ozzle internal diameter that nipple plate stretches out is 0.3cm, and external diameter is 0.5cm。Four-way joint 9 outline is square, and length of side 3cm, thickness 0.25cm, joint internal diameter is 0.5cm, and external diameter is 0.8cm。Interface is that to be transformed into internal diameter be 0.4cm to 0.8cm from internal diameter by joint crossover connection 7。Wherein place waterproof ventilated membrane 10 at gas production pin 12 with four-way joint 9 junction。Bottom empty cylinder top linkage board 17, empty cylinder, linkage board 20 and piston handle linkage board 16 are the thick steel plate of 0.5cm, reserve corresponding hole in corresponding position and are attached with empty cylinder 3。Stainless steel handle 18 is rigidly connected with empty cylinder top linkage board 17。
Apparatus of the present invention are in use:
A, locus according to sampled point are distributed, linkage board 20 and piston handle linkage board 16 bottom customization corresponding empty cylinder top linkage board 17, empty cylinder。Utilize linkage board 20 and piston handle linkage board 16 bottom empty cylinder top linkage board 17, empty cylinder to be fitted together by each monomer gas sampling apparatus, check the air-tightness of gas producing device。Making device be in home state by pushing tow handle 18, namely keep piston 4 to be in the bottom of sky cylinder, air bleeding valve 8, gas production valve 11 and gas collection valve 13 are in closure state。Finally by the gas production syringe needle injection of gas sampling assembly to each sample point testing soil sample 21, and linkage board 20 bottom sky cylinder top linkage board 17 and empty cylinder is fixed on testing stand。
B, the sampling time interval set according to test, when sampling, first open the gas production valve 11 in all single-point sampling apparatuses, and by shaking hands, piston 4 is pulled outward by 18 drive piston handles 1, piston shaft 2 and piston handle linkage board 16, and the gas in soil sample enters in empty cylinder 3。Then gas production valve 11 cuts out, open air bleeding valve 8, by shake hands 18 drive piston handles 1, piston shaft 2 and piston handle linkage board 16, piston is shifted onto the bottom of sky cylinder 3, discharges after the gas in empty cylinder 3 is all processed via activated-charcoal column 6。In order to weaken the residual gas impact on gathering gas sample purity in four-way joint 9, above-mentioned steps can repeat more than 2 times。
C, closedown air bleeding valve 8, open gas production valve 11, utilize piston handle 1, piston shaft 2 and piston handle linkage board 16 to be pulled outward by piston 4, and the gas in soil sample enters in empty cylinder 3。Closing gas production valve 11, be connected on gas collection pin 15 by vacuum bag 15, open gas collection valve 13, utilize piston handle 1, piston shaft 2 and piston handle linkage board 16 that piston 4 is pushed into the bottom of sky cylinder 3, gaseous sample enters in band vacuum bag 15。Take off vacuum bag 15, censorship, complete a sampling process。
D, as continued to gather gaseous sample, only need to change vacuum bag 15 repeat the above steps。
Claims (2)
1. a Polluted Soil column test unsaturation band gas multi-point transient synchronized sampling unit, it is characterised in that this device includes pump bowl, three-dimensional needle system, linkage board；
Pump bowl includes piston handle (1), empty cylinder (3), the piston shaft (2) being positioned between this piston handle (1) and empty cylinder (3), is positioned at sky cylinder (3) bottom and the piston (4) being connected with piston shaft (2) and is positioned at the nipple plate (5) of periphery, sky cylinder (3) bottom；
Three-dimensional needle system includes the gas collection bag (15) that the gas collection pin (14) that the gas collection valve (13) that the four-way joint (9) that the air bleeding valve (8) that the joint crossover connection (7) that activated-charcoal column (6) is connected with activated-charcoal column (6) is connected with joint crossover connection (7) is connected with air bleeding valve (8) is connected with four-way joint (9) is connected with gas collection valve (13) is connected with gas collection pin (14) from top to bottom successively；The waterproof ventilated membrane (10) being covered in four-way joint (9) side, the gas production valve (11) being positioned at four-way joint (9) side and gas production pin (12)；
Linkage board (20) bottom the empty cylinder that empty cylinder top linkage board (17) that linkage board includes piston handle linkage board (16) and piston handle linkage board (16) is oppositely arranged, the handle (18) being positioned on piston handle linkage board (16), the bolt (19) laying respectively at sky cylinder top linkage board (17) and piston handle linkage board (16) and empty cylinder top linkage board (17) are oppositely arranged, bottom this sky cylinder, linkage board (20) is connected with the opposite side of four-way joint (9) and abuts against with the bottom of sky cylinder (3)。
2. Polluted Soil column test unsaturation band gas multi-point transient synchronized sampling unit according to claim 1, it is characterized in that, described four-way joint (9) connects activated carbon tube (6), waterproof ventilated membrane (10) and gas production pin (12), gas collection pin (14) and empty cylinder (3) respectively through joint crossover connection；
Wherein, air bleeding valve (8) controls activated carbon tube (6), and gas production valve (11) controls gas production pin (12), gas collection valve (13) domination set air tube (14)。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610060848.2A CN105699136B (en) | 2016-01-28 | 2016-01-28 | Pollute soil-column test unsaturation band gas multi-point transient synchronized sampling unit |
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| CN201610060848.2A CN105699136B (en) | 2016-01-28 | 2016-01-28 | Pollute soil-column test unsaturation band gas multi-point transient synchronized sampling unit |
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| CN105699136B CN105699136B (en) | 2018-07-17 |
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