CN109682649B - Rapid detection system for gas concentration layering between soil pores - Google Patents
Rapid detection system for gas concentration layering between soil pores Download PDFInfo
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- CN109682649B CN109682649B CN201910057403.2A CN201910057403A CN109682649B CN 109682649 B CN109682649 B CN 109682649B CN 201910057403 A CN201910057403 A CN 201910057403A CN 109682649 B CN109682649 B CN 109682649B
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- gas
- sampler
- soil
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- air
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- 239000002689 soil Substances 0.000 title claims abstract description 66
- 239000011148 porous material Substances 0.000 title claims abstract description 28
- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 24
- 238000005070 sampling Methods 0.000 claims abstract description 23
- 238000009434 installation Methods 0.000 claims abstract description 17
- 238000005192 partition Methods 0.000 claims abstract description 14
- 230000000903 blocking effect Effects 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000013517 stratification Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 134
- 230000005540 biological transmission Effects 0.000 abstract description 21
- 238000011835 investigation Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 8
- 241000196324 Embryophyta Species 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 239000002680 soil gas Substances 0.000 description 3
- 229910000997 High-speed steel Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- 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
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
Abstract
The invention discloses a rapid detection system for gas concentration layering among soil pores, which comprises a multi-stage sampler, a conical drill bit, a propeller, a multi-way joint, a gas production pump and a gas detector; the multistage sampler comprises a plurality of samplers which are connected in sequence and coaxial, the samplers comprise a sampler shell, a gas transmission hose interface, a gas blocking plate and a partition plate, the partition plate divides the inner part of the sampler shell into an installation cavity and a gas sampling cavity, and the side wall of the gas sampling cavity is provided with a vent hole. The gas production pump and the gas detector are connected with the sampler through the multi-way joint and the gas transmission hose, gas in the gas production cavity is extracted by the gas production pump, and the gas is transmitted to the gas detector through the gas transmission hose to detect the concentration of the gas. The invention can rapidly detect the concentration of various gases in soil in a layered manner, and can serve for the investigation of accurate facility agriculture, ecology and environment.
Description
Technical Field
The invention belongs to the technical field of soil quality evaluation, and particularly relates to a rapid detection system for gas concentration layering among soil pores.
Background
Different plants have certain differences in the concentration of oxygen demand among soil pores, the demand quantity and the depth of a soil layer required by the different plants due to the different depths of root systems penetrating into the soil, the different root system forms, different root structures and different physiological characteristics. At present, a layering rapid detection system special for the concentration of oxygen, carbon dioxide and other gases in soil around a plant root system is lacking in agricultural or ecological investigation, and investigation and research of the gas among soil pores are limited due to the lack of a direct detection device for the concentration of the gas among pores with different soil layer depths.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a rapid layered detection system for gas concentration among soil pores, which overcomes the defect that the prior art lacks a rapid layered detection system specially aiming at the gas concentration of oxygen, carbon dioxide and the like in soil around plant roots.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the rapid detection system comprises a multi-stage sampler, a conical drill bit arranged at the lower end of the multi-stage sampler, a propeller arranged at the upper end of the multi-stage sampler, a multi-way joint which is positioned above the propeller and communicated with the multi-stage sampler, a gas production pump communicated with the multi-way joint and a gas detector communicated with the gas production pump;
the multistage sampler comprises a plurality of samplers which are connected in sequence and coaxial, the samplers comprise cylindrical sampler shells, a baffle which is parallel to the central axis of the samplers and is connected with the inner wall of the sampler shells is arranged in the sampler shells, and the baffle divides the inner parts of the sampler shells into an installation cavity and a gas sampling cavity which are not communicated with each other;
the upper end and the lower end of the installation cavity are opened, a gas transmission hose connector is arranged on the partition plate, and the multi-way joint is communicated with the gas transmission hose connector in a sealing way through a gas transmission hose arranged in the installation cavity and is used for communicating the multi-way joint with the gas sampling cavity in a sealing way;
the upper end opening of the gas-collecting cavity is provided with a gas-blocking plate in a sealing way, and the side wall of the gas-collecting cavity is provided with a plurality of air holes.
The invention also comprises the following technical characteristics:
optionally, the upper end of the sampler shell is a positive screw thread, the lower end of the sampler shell is a negative screw thread, and the adjacent sampler shells are connected through the positive screw thread and the negative screw thread;
the installation cavities of the two adjacent samplers are communicated with each other, and the gas-collecting cavities of the two adjacent samplers are isolated by a gas-blocking plate, so that the gas-collecting cavities of the two adjacent samplers are not communicated with each other, and the gas-collecting cavities can only be ventilated with the outside through the vent holes of the gas-collecting cavities;
the multi-way joint is connected with a plurality of independent air transmission hoses, the air transmission hoses extend into the mounting cavity, and each air transmission hose is hermetically communicated with one air sampling cavity through an air transmission hose interface on each sampler partition plate.
Optionally, the multi-way connector comprises an air outlet connector and a plurality of air inlet connectors, each air inlet connector is provided with a switch, and the switch is provided with a label, so that the air delivery hose connected to the air inlet connector corresponds to the sampler through the label.
Optionally, the propeller comprises a propelling pipe coaxially arranged with the multi-stage sampler and connected to the upper end of the multi-stage sampler, two pedals which are arranged at the lower end of the outer wall of the propelling pipe and are perpendicular to the propelling pipe, and two handles which are arranged at the upper end of the outer wall of the propelling pipe and are perpendicular to the propelling pipe;
the length of the propelling tube is 50cm;
the opening of the lower part of the pushing tube is a reverse screw thread which is used for being connected with a positive screw thread at the upper end of the multistage sampler.
Optionally, the upper end of the drill bit is provided with a positive screw thread for being connected with a negative screw thread at the lower end of the multi-stage sampler.
Optionally, the sampler shell surrounding the installation cavity and the sampler shell surrounding the gas sampling cavity are detachably connected with each other; the sampler shell surrounding the gas sampling cavity comprises a breathable pipe wall, a wire netting, a waterproof breathable film, a wire netting and a breathable pipe wall which are sequentially arranged from inside to outside and are detachable from each other.
Optionally, the multi-way joint is communicated with the gas production pump in a sealing way through a gas hose, and the gas production pump is communicated with the gas detector in a sealing way through a gas hose.
Optionally, the length of the sampler is 10cm or 20cm.
Optionally, the gas detector is an EDKORS type hand-held gas detector or a bio8901 type carbon dioxide detector; the air pump is a baoshan 500 type air pump or a Beijing Zhuo An ZC500 type air pump; the conical surface of the drill bit is provided with a thread structure so as to facilitate the drill bit to be inserted into soil, and the drill bit is made of HSS-4241 high-speed steel.
Compared with the prior art, the invention has the beneficial technical effects that:
according to the invention, negative pressure is respectively generated in the plurality of samplers through the gas production pump, so that soil gases with different soil depths are obtained and are connected with the handheld gas detector, and the on-site real-time detection of the gas concentration is realized; the problem that the gas concentration among soil pores is difficult to detect in a layering way is solved, the aim of detecting the concentration of various gases in soil in a layering way rapidly can be achieved, and the method can be used for accurately investigating facility agriculture, ecology and environment.
In the system, the gas production pump and the gas detector are connected with the sampler through the multi-way joint and the gas transmission hose, gas in the gas production cavity is extracted by the gas production pump, and the gas is transmitted to the gas detector through the gas transmission hose to detect the concentration of the gas. The sampler can be inserted into the soil once to rapidly detect the concentration of gas among soil pores at a plurality of soil layer depths in the soil.
And (III) compared with the traditional method for extracting gas by using a drill rod and analyzing the gas components by gas chromatography, the system does not need to bring a gas sample back to a laboratory for analysis from the wild, can quickly complete gas concentration detection in situ during sampling, has more application value in long-term wild investigation, and has lower cost.
According to the invention, the sampler is inserted into the soil once, so that the gas concentration between soil pores with different soil layer depths can be detected; compared with a method for extracting gas from a drill rod and analyzing the gas components by using a gas chromatograph, the method can reduce the problem of low data accuracy caused by mixing of different soil layer gases.
(V) a plurality of samplers can splice fast in the field, can freely assemble the collocation according to the difference of detecting soil layer degree of depth, more has the practicality. The five-layer structure of the sampler is easy to disassemble, so that the gas among soil gaps is ensured to smoothly enter the sampler, and the sampler is easy to disassemble and clean after being blocked due to long-term sampling.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of a multi-way joint according to the present invention;
FIG. 3 is a schematic view of a propeller structure according to the present invention;
FIG. 4 is a schematic cross-sectional view of a sampler of the present invention;
FIG. 5 is a schematic longitudinal section of the sampler of the present invention;
FIG. 6 is a schematic view of the structure of the gas-collecting chamber of the present invention;
the reference numerals in the figure are 1-multi-stage sampler, 2-drill bit, 3-propeller, 4-multi-way joint, 5-gas pump and 6-gas detector;
11-sampler, 112-baffle, 113-installation cavity, 114-gas collection cavity, 115-gas transmission hose interface, 116-gas blocking plate and 117-vent;
31-pushing tube, 32-pedal, 33-handle;
41-air outlet joint, 42-air inlet joint.
Detailed Description
The following specific embodiments of the present invention are given according to the above technical solutions, and it should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solutions of the present application fall within the protection scope of the present invention. The present invention will be described in further detail with reference to examples.
Example 1:
as shown in fig. 1 to 6, the rapid detection system for gas concentration layering between soil pores comprises a multi-stage sampler 1, a conical drill bit 2 arranged at the lower end of the multi-stage sampler 1, a propeller 3 arranged at the upper end of the multi-stage sampler 1, a multi-way joint 4 which is positioned above the propeller 3 and is communicated with the multi-stage sampler 1, a gas production pump 5 which is communicated with the multi-way joint 4, and a gas detector 6 which is communicated with the gas production pump 5; the multistage sampler 1 comprises a plurality of samplers 11 which are sequentially connected and coaxial, wherein the samplers 11 comprise cylindrical sampler shells, a baffle 112 which is parallel to the central axis of the samplers 11 and is connected with the inner wall of the sampler shells is arranged in the sampler shells, and the baffle 112 divides the inner parts of the sampler shells into an installation cavity 113 and a gas sampling cavity 114 which are not communicated with each other; the installation cavity 113 can protect an internal gas transmission hose; the upper end and the lower end of the installation cavity 113 are opened, a gas transmission hose connector 115 is arranged on the partition 112, and the multi-way joint 4 is communicated with the gas transmission hose connector 115 in a sealing way through a gas transmission hose arranged in the installation cavity 113, so as to be communicated with the gas sampling cavity 114 in a sealing way; the upper end opening of the gas-collecting cavity 114 is provided with a gas-blocking plate 116 in a sealing way, and the side wall of the gas-collecting cavity 114 is provided with a plurality of air holes 117. Respectively generating negative pressure in a plurality of samplers through a gas production pump, obtaining soil gases with different soil depths, and connecting the soil gases with a handheld gas detector to realize on-site real-time detection of the gas concentration; the problem that the gas concentration among soil pores is difficult to detect in a layering way is solved, the aim of detecting the concentration of various gases in soil in a layering way rapidly can be achieved, and the method can be used for accurately investigating facility agriculture, ecology and environment.
The upper end of the sampler shell is provided with a positive screw socket, the lower end of the sampler shell is provided with a negative screw socket, and the adjacent sampler shells are connected through the positive screw socket and the negative screw socket; the installation cavities 113 of the two adjacent samplers 11 are communicated with each other, the gas sampling cavities 114 of the two adjacent samplers 11 are isolated by the gas blocking plate 116, so that the gas sampling cavities 114 of the two adjacent samplers 11 are not communicated with each other, the gas sampling cavities 114 can only be ventilated with the outside through the ventilation holes 117 thereof, the gas blocking plate 116 can block the flow of gas between the two adjacent samplers 11, and the gas blocking plate 116 can be wedged on the partition plate 112; the multi-way joint 4 is connected with a plurality of independent air delivery hoses which extend into the mounting cavity 113, and each air delivery hose is hermetically communicated with one air sampling cavity 114 through an air delivery hose interface 115 on the partition 112 of each sampler 11.
The multi-way connector 4 comprises an air outlet connector 41 and a plurality of air inlet connectors 42, wherein a switch is arranged on each air inlet connector 42, and an identification patch is attached to the switch for enabling the air hose connected to the air inlet connector 42 to correspond to the sampler 11 through the identification patch.
The propeller 3 comprises a propelling pipe 31 which is coaxially arranged with the multi-stage sampler and is connected to the upper end of the multi-stage sampler, two foot pedals 32 which are arranged at the lower end of the outer wall of the propelling pipe 31 and are perpendicular to the propelling pipe 31, and two handles 33 which are arranged at the upper end of the outer wall of the propelling pipe 31 and are perpendicular to the propelling pipe 31; the length of the pushing tube 31 is 50cm; the opening of the lower part of the pushing tube 31 is a reverse screw thread which is used for being connected with a positive screw thread at the upper end of the multi-stage sampler 1.
The upper end of the drill bit 2 is provided with a positive screw thread which is used for being connected with a negative screw thread at the lower end of the multi-stage sampler 1.
The sampler housing enclosing the mounting cavity 113, the sampler housing enclosing the gas sampling cavity 114 and the partition 112 are detachably connected; the sampler housing enclosing the gas sampling cavity 114 comprises five layers of structures of a breathable pipe wall, a wire netting, a waterproof breathable film, a wire netting and a breathable pipe wall which are sequentially arranged from inside to outside and are detachable from each other, the five layers of structures can be detached for cleaning after long-term sampling to cause the blockage of the sampler 11, and the size of the breathable holes in the breathable pipe wall is based on the principle that soil particles in the soil, which are inserted into the soil by the sampler 11, cannot enter the sampler 11 through the breathable holes; the density of the ventilation holes is suitable for ensuring that the gas between the soil pores can rapidly enter the sampler to meet the detection requirement of the handheld gas detector when the gas production pump works; the single sampler can be connected into a multi-stage sampler through the positive screw and the negative screw at the top end and the bottom end of the sampler.
All through the air hose sealed intercommunication between the multi-way joint 4 and the gas production pump 5, between gas production pump 5 and the gas detector 6, the air hose is the hollow hose of colloid, and has ageing resistance, the characteristics of buckling resistance.
The length of the samplers 11 is 10cm or 20cm, specifically, in this embodiment, four samplers 11 are provided, the length of each sampler 11 is 10cm, the multi-way connector 44 in this embodiment includes an air outlet connector 41 and four air inlet connectors 42, four air delivery hoses are respectively inserted into air delivery hose connectors 115 on the partition boards 112 of the four samplers 11, and the other ends of the four air delivery hoses are respectively communicated with the four air inlet connectors 42, so that sequential communication among the samplers 11, the multi-way connector 44, the air pump 5 and the air detector 6 is realized, and layered monitoring of the air concentration is realized. More specifically, the method for detecting the gas concentration layering among soil pores at the depth of a soil layer of 0-40 cm comprises the following steps: the method comprises the steps of pressing a propeller handle or stepping a pedal, inserting all four samplers into soil, if the soil is too hard and the samplers are difficult to be completely inserted into the soil, punching holes in the soil with the same aperture as the samplers, inserting the samplers into the soil in advance until the pedal contacts with soil on the surface, after the samplers are completely inserted into the soil, stirring a multi-way joint switch, enabling a handheld gas detector to be only communicated with a bottommost gas hose, starting a gas pump and the handheld gas detector, reading data after the degree of the handheld gas detector is stable to obtain gas concentration between soil pores with the depth of 30-40 cm, stirring the switch, enabling the handheld gas detector to be only communicated with a collector with the depth of 20-30 cm, reading data after the degree of the handheld gas detector is stable to obtain gas concentration between soil pores with the depth of 20-30 cm, pushing the multi-way joint switch, detecting the gas concentration between the soil pores with the depth of 10-20 cm and the depth of 0-10 cm, closing the handheld gas detector and the gas pump after the detection, pulling out the soil layers, and disassembling the handheld gas detector, and completing the detection of the gas concentration layers between the soil pores with the depth of 0-40 cm.
Various handheld gas detectors can be carried according to different monitoring gas requirements, and the specific gas detector 6 can be used for monitoring oxygen, hydrogen sulfide, carbon monoxide and methane when the specific gas detector 6 is an EDKORS type handheld gas detector; the gas detector 6 is a rain 8901 type carbon dioxide detector, and can be used for monitoring carbon dioxide; the air pump 5 is a baoshan 500 type air pump or a Beijing Zhuo An ZC500 type air pump, and the flow is required to be 200-600ml/min during working; the conical surface of the drill bit 2 is provided with a thread structure so as to facilitate the drill bit to be inserted into soil, and the drill bit 2 is made of HSS-4241 high-speed steel which is a hard material convenient to be inserted into the soil.
The application method of the invention is as follows:
before detection, connecting a plurality of samplers into a multi-stage sampler according to the depth of a soil layer to be detected through a screw, wherein the bottom of the multi-stage sampler is connected with a drill bit, and the top of the multi-stage sampler is connected with a propeller; the air transmission hose is connected with an air transmission hose interface on the separator of the sampler, and the air blocking plate is wedged into the sampler after the connection is finished; the other ends of all the air transmission hoses connected with the samplers are connected with the air collecting pump and the handheld air detector through the multi-way connectors, and the whole system is connected as shown in figure 1; after connection is completed, all the samplers are fully inserted into the soil by pressing the handle until the foot pedal is contacted with the soil on the surface of the soil; opening the multi-way joint to enable the handheld gas detector to be communicated with the specific depth sampler only; opening the gas production pump and the handheld gas detector, generating pressure difference between the inside and outside of the sampler by the suction force when the gas production pump is used for sampling, forcing gas between soil pores to enter the sampler through the air holes, transmitting the gas to the handheld gas detector for detecting the gas concentration between the soil pores by the gas transmission hose, and reading data after the degree of the handheld gas detector is stable.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (7)
1. The rapid detection system for the gas concentration layering among the soil pores is characterized by comprising a multi-stage sampler (1), a conical drill bit (2) arranged at the lower end of the multi-stage sampler (1), a propeller (3) arranged at the upper end of the multi-stage sampler (1), a multi-way joint (4) which is positioned above the propeller (3) and is communicated with the multi-stage sampler (1), a gas production pump (5) which is communicated with the multi-way joint (4) and a gas detector (6) which is communicated with the gas production pump (5);
the multistage sampler (1) comprises a plurality of samplers (11) which are connected in sequence and coaxial, the samplers (11) comprise cylindrical sampler shells, a partition board (112) which is parallel to the central axis of the samplers (11) and is connected with the inner wall of the sampler shells is arranged in the sampler shells, and the partition board (112) divides the inner parts of the sampler shells into an installation cavity (113) and a gas sampling cavity (114) which are not communicated with each other;
the upper end and the lower end of the installation cavity (113) are opened, a gas hose connector (115) is arranged on the partition plate (112), and the multi-way joint (4) is communicated with the gas hose connector (115) in a sealing way through a gas hose arranged in the installation cavity (113) so as to be communicated with the gas collection cavity (114) in a sealing way;
an air blocking plate (116) is arranged at the upper end opening of the air collecting cavity (114) in a sealing manner, and a plurality of air holes (117) are formed in the side wall of the air collecting cavity (114);
the upper end of the sampler shell is provided with a positive screw socket, the lower end of the sampler shell is provided with a negative screw socket, and the adjacent sampler shells are connected through the positive screw socket and the negative screw socket;
the installation cavities (113) of two adjacent samplers (11) are communicated with each other, and the gas-collecting cavities (114) of the two adjacent samplers (11) are isolated by a gas-blocking plate (116), so that the gas-collecting cavities (114) of the two adjacent samplers (11) are not communicated with each other, and the gas-collecting cavities (114) can be ventilated with the outside only through ventilation holes (117) thereof;
the multi-way joint (4) is connected with a plurality of independent air conveying hoses, the air conveying hoses extend into the mounting cavity (113), and each air conveying hose is hermetically communicated with one air sampling cavity (114) through an air conveying hose connector (115) on a partition plate (112) of each sampler (11);
the sampler shell surrounding the installation cavity (113), the sampler shell surrounding the gas sampling cavity (114) and the partition board (112) are detachably connected; the sampler shell enclosing the gas sampling cavity (114) comprises a breathable pipe wall, a wire netting, a waterproof breathable film, a wire netting and a breathable pipe wall which are sequentially arranged from inside to outside and are detachable from each other.
2. The soil pore space gas concentration layering rapid detection system according to claim 1, wherein the multi-way joint (4) comprises an air outlet joint (41) and a plurality of air inlet joints (42), a switch is arranged on each air inlet joint (42), and an identification patch is attached to the switch and used for enabling a gas hose connected to the air inlet joint (42) to correspond to the sampler (11) through the identification patch.
3. The soil pore space gas concentration layering rapid detection system according to claim 1, wherein the propeller (3) comprises a propeller pipe (31) which is coaxially arranged with the multi-stage sampler and is connected to the upper end of the multi-stage sampler, two foot pedals (32) which are arranged at the lower end of the outer wall of the propeller pipe (31) and are perpendicular to the propeller pipe (31), and two handles (33) which are arranged at the upper end of the outer wall of the propeller pipe (31) and are perpendicular to the propeller pipe (31);
the length of the propulsion tube (31) is 50cm;
the opening of the lower part of the pushing tube (31) is a reverse screw thread which is used for being connected with a positive screw thread at the upper end of the multi-stage sampler (1).
4. The rapid detection system for gas concentration layering among soil pores according to claim 1, wherein the upper end of the drill bit (2) is provided with a positive screw thread for being connected with a negative screw thread at the lower end of the multi-stage sampler (1).
5. The rapid soil pore gas concentration layering detection system according to claim 1, wherein the multi-way joint (4) is communicated with the gas production pump (5) and the gas production pump (5) is communicated with the gas detector (6) in a sealing mode through a gas hose.
6. The rapid detection system for gas concentration stratification between soil pores according to claim 1, characterized in that the length of the sampler (11) is 10cm or 20cm.
7. The rapid detection system for gas concentration layering among soil pores according to claim 1, wherein the gas detector (6) is an EDKORS type hand-held gas detector or a rewo 8901 type carbon dioxide detector; the air pump (5) is a baoshan 500 type air pump or a Beijing Zhuo An ZC500 type air pump; the conical surface of the drill bit (2) is provided with a thread structure so as to facilitate the insertion of the drill bit into the soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910057403.2A CN109682649B (en) | 2019-01-22 | 2019-01-22 | Rapid detection system for gas concentration layering between soil pores |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910057403.2A CN109682649B (en) | 2019-01-22 | 2019-01-22 | Rapid detection system for gas concentration layering between soil pores |
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| CN109682649A CN109682649A (en) | 2019-04-26 |
| CN109682649B true CN109682649B (en) | 2024-01-19 |
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| CN112051386B (en) * | 2020-09-16 | 2022-07-01 | 西南民族大学 | Soil methane detection device and method |
| CN112881109B (en) * | 2021-01-22 | 2023-04-18 | 上海建科环境技术有限公司 | High-precision soil gas single-hole multilayer sampling device |
Citations (10)
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