CN115808375A - Continuous soil gas flux observation device and method - Google Patents
Continuous soil gas flux observation device and method Download PDFInfo
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- CN115808375A CN115808375A CN202211426367.0A CN202211426367A CN115808375A CN 115808375 A CN115808375 A CN 115808375A CN 202211426367 A CN202211426367 A CN 202211426367A CN 115808375 A CN115808375 A CN 115808375A
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Abstract
The invention discloses a soil gas flux continuous observation device and a method, which comprises a sampling chamber, an air pump, a gas concentration detector and a gas path adjusting device, wherein the bottom of the sampling chamber is open, two ends of an air inlet pipe are respectively connected with an air outlet of the air pump and an air inlet of the sampling chamber, two ends of an exhaust pipe are respectively connected with an air outlet of the sampling chamber and an air inlet of the gas concentration detector, two ends of an air inlet pipe are respectively connected with an air inlet of the air pump and an air path adjusting device, two ends of an air outlet pipe are respectively connected with an air outlet of the gas concentration detector and the gas path adjusting device, the gas path adjusting device can adjust the air inlet pipe and the air outlet pipe to be respectively and independently communicated with the outside, and the gas path adjusting device can adjust the air outlet pipe and the air inlet pipe to be communicated and separate the air outlet pipe and the air inlet pipe from the outside.
Description
Technical Field
The invention relates to the technical field of soil gas measurement, in particular to a continuous soil gas flux observation device and method.
Background
The current soil gas measurement technology mainly focuses on concentration measurement, namely, the concentration percentage of each component in the soil gas is measured to reflect the proportion of each component in the soil gas. In the absence of soil gas flux measurements, soil flux reflects the diffusion, transport and aggregation capabilities of soil gases.
The current soil gas flux is mainly applied to agriculture, greenhouse gas emission is measured, and the flux is measured in a single discontinuous mode.
In the aspect of geology, resource and environmental monitoring, the gas in the underground depth needs to be continuously detected, and a device for continuously observing the flux of the soil gas in the underground depth is not available at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a continuous soil gas flux observation device and method, which can realize continuous detection of gas at the underground depth on the ground surface, analyze the flux change of the gas at the underground depth and reduce the labor cost and the time cost.
The utility model provides a soil gas flux continuous observation device, including sampling chamber, air pump, gas concentration detector and gas circuit adjusting device, sampling chamber inner chamber bottom is open, the both ends of intake pipe are connected with air pump gas outlet and sampling chamber air inlet respectively, the both ends of blast pipe are connected with sampling chamber gas outlet and gas concentration detector air inlet respectively, go into tracheal both ends and be connected with air pump air inlet and gas circuit adjusting device respectively, the both ends of outlet duct are connected with gas concentration detector gas outlet and gas circuit adjusting device respectively, gas circuit adjusting device can adjust into trachea and outlet duct and independently switch on with the outside respectively, gas circuit adjusting device can adjust the outlet duct and go into the trachea and switch on and make the outlet duct cut off with the outside with going into the trachea.
Preferably, gas circuit adjusting device is including violently managing and standpipe, and the standpipe passes violently the pipe, violently is provided with first valve on the pipe, and first valve is located the standpipe right side, is provided with the second valve on the standpipe, and the second valve is located violently the pipe top, and open the standpipe lateral wall has the exhaust hole, and the exhaust hole is located violently intraductal, and exhaust hole department is provided with the third valve, goes into tracheal one end and violently manages the left end and be connected, and the one end and the standpipe bottom of outlet duct are connected.
Preferably, the first valve, the second valve and the third valve are all solenoid valves.
Preferably, a drying device is arranged on the exhaust pipe, and the drying device can dry the entering gas.
Preferably, a filter plate is arranged in the drying device, and the filter plate can filter particles in the gas.
Preferably, the sampling chamber is cylindrical or hemispherical.
Preferably, the both ends of intake pipe can be dismantled with air pump gas outlet and sampling chamber air inlet respectively and be connected, and the both ends of blast pipe can be dismantled with sampling chamber gas outlet and gas concentration detector air inlet respectively and be connected, and the both ends of income trachea can be dismantled with air pump air inlet and gas circuit adjusting device respectively and be connected, and the both ends of outlet duct can be dismantled with gas concentration detector gas outlet and gas circuit adjusting device respectively and be connected.
A continuous observation method for soil gas flux comprises the following steps:
A. digging a placing hole in soil, placing a sampling chamber at the bottom of the placing hole, and filling the placing hole with soil above the sampling chamber;
B. the gas path adjusting device adjusts the gas inlet pipe and the gas outlet pipe to be respectively and independently communicated with the outside, and the gas pump is started to replace the gas in the sampling chamber;
C. the gas circuit adjusting device adjusts the gas inlet pipe and the gas outlet pipe to be communicated, the gas inlet pipe and the gas outlet pipe are separated from the outside, and the gas concentration detector is started to continuously detect the concentration of gas entering the sampling chamber from the deep underground soil.
The invention has the beneficial effects that: set up the sampling chamber among this technical scheme, the air pump, gas concentration detector and gas circuit adjusting device, and the cooperation intake pipe, the blast pipe, go into trachea and outlet duct, when specifically using, bury soil depths with the sampling chamber, control gas circuit adjusting device adjusts into trachea and outlet duct and outside conduction this moment, gas in the sampling chamber is replaced, then adjust gas circuit adjusting device, make into trachea and outlet duct and outside wall, go into trachea and outlet duct intercommunication, start gas concentration detector this moment, gas passes through the air pump in proper order, the intake pipe, the sampling chamber, the blast pipe, gas concentration detector, the outlet duct, circulation between the admission pipe, gas concentration detector continuously detects gas concentration, measured gas concentration can reaction gas diffusion and migration ability along with the time variation, so place the sampling chamber in soil depths, all the other corresponding subassemblies are placed in the earth's surface, realize carrying out continuous detection to underground depths gas at the earth's surface, the gaseous flux change of analysis underground depths, reduce manual work and time cost.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings used in the detailed description or the prior art description will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a front view of the present invention;
fig. 2 is a front sectional view of the air path adjusting device of the present invention.
In the attached figure, 1-a sampling chamber, 2-an air pump, 3-an air concentration detector, 4-a drying device, 5-an air inlet pipe, 6-an air outlet pipe, 7-an air inlet pipe, 8-an air outlet pipe, 9-an air path adjusting device, 91-a transverse pipe, 92-a vertical pipe, 93-a first valve, 94-a second valve and 95-a third valve.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only used as examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Example 1
As shown in fig. 1-2, provide a soil gas flux continuous observation device in this embodiment, including sampling chamber 1, air pump 2, gas concentration detector 3 and gas circuit adjusting device 9, 1 inner chamber bottom of sampling chamber is open, the both ends of intake pipe 5 are connected with 2 gas outlets of air pump and 1 air inlet of sampling chamber respectively, the both ends of blast pipe 6 are connected with 1 gas outlet of sampling chamber and 3 air inlets of gas concentration detector respectively, the both ends of income trachea 7 are connected with 2 air inlets of air pump and gas circuit adjusting device 9 respectively, the both ends of escape pipe 8 are connected with 3 gas outlets of gas concentration detector and gas circuit adjusting device 9 respectively, gas circuit adjusting device 9 can adjust and go into trachea 7 and 8 and independently switch on with the outside respectively, gas circuit adjusting device 9 can adjust that escape pipe 8 and income trachea 7 switch on and make escape pipe 8 and income trachea 7 cut off with the outside.
In the embodiment, a sampling chamber 1, an air pump 2, a gas concentration detector 3 and a gas path adjusting device 9 are arranged, and are matched with an air inlet pipe 5, an air outlet pipe 6, an air inlet pipe 7 and an air outlet pipe 8, and the air pump 2, the air inlet pipe 5, the sampling chamber 1, the air outlet pipe 6, the gas concentration detector 3, the air outlet pipe 8, the gas path adjusting device 9 and the air inlet pipe 7 form a circulating gas path;
when the sampling device is used specifically, the sampling chamber 1 is buried in the deep soil, the gas path adjusting device 9 is controlled to adjust the gas inlet pipe 7 and the gas outlet pipe 8 to be communicated with the outside at the moment, the gas pump 2 is started, gas enters the gas pump 2 from the outside and then enters the sampling chamber 1 through the gas inlet pipe 5, and residual soil gas in the sampling chamber 1 is discharged through the gas outlet pipe 6, the gas concentration detector 3 and the gas outlet pipe 8, so that the residual soil gas in the sampling chamber 1 is replaced into the surface air, the gas in the sampling chamber 1 is replaced, the gas in the sampling chamber 1 starts from an air background value before measurement, and the measurement precision is improved;
then adjust gas circuit adjusting device 9, make into trachea 7 and outlet duct 8 and outside wall, go into trachea 7 and outlet duct 8 intercommunication, start gas concentration detector 3 this moment, air pump 2 provides power for gas circulation, the gas diffusion of soil depths gets into in the sampling chamber 1, along with existing gas in the whole circulation gas circuit circulates, gas concentration detector 3 continuously detects gas concentration, until gas pressure reaches equilibrium in the circulation gas circuit, then solve the gas flux according to the relation of time and gas concentration variation, the gas concentration of so measuring can react gas diffusion and migration ability along with the time variation, this equipment sets up the control system who corresponds, control system adopts prior art not do unnecessary perplexing here, so place sampling chamber 1 in soil depths, all the other corresponding subassemblies are placed in the earth's surface, realize carrying out continuous detection to underground depths gas at the earth's surface, the gaseous flux change of assay underground depths, reduce manual work and time cost.
Specifically, the volume of the sampling chamber 1 is set to be about 55L, gas replacement in the sampling chamber 1 can be completed within half an hour, for example, carbon dioxide gas is measured, gas in the circulating gas circuit reaches basic balance within half an hour, after one-time measurement, the gas in the sampling chamber 1 needs to be replaced again, and measurement is started again after replacement. The gas concentration detector 3 may be a gas concentration detector for carbon monoxide, carbon dioxide, or the like.
In this embodiment the gas circuit adjusting device 9 includes violently managing 91 and standpipe 92, and standpipe 92 passes violently managing 91, violently manages 91 and is provided with first valve 93, and first valve 93 is located standpipe 92 right side, is provided with second valve 94 on the standpipe 92, and second valve 94 is located violently manages 91 top, and open at the standpipe 92 lateral wall has the exhaust hole, and the exhaust hole is located violently manages 91, and exhaust hole department is provided with third valve 93, and the one end of income trachea 7 is connected with violently managing 91 left end, and the one end and the standpipe 92 bottom of outlet duct 8 are connected.
In this embodiment, the transverse tube 91 and the vertical tube 92 are arranged, the first valve 93, the second valve 94 and the third valve 95 are arranged, when the sampling chamber 1 is used, when gas in the sampling chamber is replaced, the third valve 95 is closed, the first valve 93 and the second valve 94 are opened, the gas inlet tube 7 and the gas outlet tube 8 are independently communicated with the outside, when the gas in the sampling chamber 1 is completely replaced and detected, the first valve 93 and the second valve 94 are closed, the third valve 95 is opened, the gas inlet tube 7 and the gas outlet tube 8 are communicated, and therefore replacement and circulation of gas in the sampling chamber 1 are achieved.
In this embodiment, the first valve 93, the second valve 94 and the third valve 95 are all solenoid valves. Therefore, the control system can control the first valve 93, the second valve 94 and the third valve 95 conveniently, and automatic and continuous detection is realized.
In this embodiment, the exhaust pipe 6 is provided with a drying device 4, and the drying device 4 can dry the gas entering the drying device. When the humidity of the gas is higher than 10%, which may cause too large and distorted measured value error, the drying device 4 may dry the gas entering from the sampling chamber 1 to ensure the dryness of the gas entering the gas concentration detector 3, thereby improving the accuracy of measurement.
In this embodiment, a filter plate is disposed in the drying device 4, and the filter plate can filter particulate matters in the gas. Set up the filter in this embodiment, can filter the particulate matter, the drying function of cooperation drying device 4 can prevent that the pipeline from weing, blockking up, influences the survey value size.
The sampling chamber 1 in this embodiment is cylindrical or hemispherical.
In this embodiment the both ends of intake pipe 5 can be dismantled with 2 gas outlets of air pump and 1 air inlet of sampling chamber respectively and be connected, and the both ends of blast pipe 6 can be dismantled with 1 gas outlet of sampling chamber and 3 air inlets of gas concentration detector respectively and be connected, and the both ends of income trachea 7 can be dismantled with 2 air inlets of air pump and gas circuit adjusting device 9 respectively and be connected, and the both ends of outlet duct 8 can be dismantled with 3 gas outlets of gas concentration detector and gas circuit adjusting device 9 respectively and be connected. Set up intake pipe 5, blast pipe 6 in this embodiment, go into trachea 7, outlet duct 8 and correspond equipment and can dismantle and be connected, can dismantle the connection and adopt current quick detach connector, be convenient for transportation and installation.
Example 2
The embodiment is further limited on the basis of embodiment 1, and the embodiment provides a continuous observation method for soil gas flux, which comprises the following steps:
A. digging a placing hole in soil, placing the sampling chamber 1 at the bottom of the placing hole, and filling the placing hole with soil above the sampling chamber 1;
B. the gas path adjusting device 9 adjusts the gas inlet pipe 7 and the gas outlet pipe 8 to be respectively and independently communicated with the outside, and the gas pump 2 is started to replace the gas in the sampling chamber 1;
C. the gas circuit adjusting device 9 adjusts the gas inlet pipe 7 and the gas outlet pipe 8 to be communicated, the gas inlet pipe 7 and the gas outlet pipe 8 are separated from the outside, and the gas concentration detector 3 is started to continuously detect the concentration of gas entering the sampling chamber 1 from the deep underground soil.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (8)
1. The utility model provides a soil gas flux continuous observation device, a serial communication port, including sampling chamber (1), air pump (2), gas concentration detector (3) and gas circuit adjusting device (9), sampling chamber (1) inner chamber bottom is open, the both ends of intake pipe (5) are connected with air pump (2) gas outlet and sampling chamber (1) air inlet respectively, the both ends of blast pipe (6) are connected with sampling chamber (1) gas outlet and gas concentration detector (3) air inlet respectively, the both ends of income trachea (7) are connected with air pump (2) air inlet and gas circuit adjusting device (9) respectively, the both ends of outlet duct (8) are connected with gas concentration detector (3) gas outlet and gas circuit adjusting device (9) respectively, gas circuit adjusting device (9) can adjust income trachea (7) and outlet duct (8) and independently switch on with the outside respectively, gas circuit adjusting device (9) can adjust outlet duct (8) and go into trachea (7) and switch on and make outlet duct (8) and income trachea (7) and outside cut off.
2. The soil gas flux continuous observation device according to claim 1, wherein the gas path adjusting device (9) comprises a horizontal tube (91) and a vertical tube (92), the vertical tube (92) passes through the horizontal tube (91), a first valve (93) is arranged on the horizontal tube (91), the first valve (93) is positioned on the right side of the vertical tube (92), a second valve (94) is arranged on the vertical tube (92), the second valve (94) is positioned above the horizontal tube (91), an exhaust hole is formed in the side wall of the vertical tube (92), the exhaust hole is positioned in the horizontal tube (91), a third valve (93) is arranged at the exhaust hole, one end of the gas inlet tube (7) is connected with the left end of the horizontal tube (91), and one end of the gas outlet tube (8) is connected with the bottom end of the vertical tube (92).
3. The continuous soil gas flux observing device according to claim 2, wherein said first valve (93), said second valve (94) and said third valve (95) are solenoid valves.
4. The soil gas flux continuous observation device according to claim 1, wherein the exhaust pipe (6) is provided with a drying device (4), and the drying device (4) can dry the entering gas.
5. The continuous soil gas flux observation device according to claim 4, wherein a filter plate is arranged in the drying device (4), and the filter plate can filter particulate matters in the gas.
6. The soil gas flux continuous observation device according to claim 1, characterized in that the sampling chamber (1) is cylindrical or hemispherical.
7. The soil gas flux continuous observation device according to claim 1, wherein the two ends of the gas inlet pipe (5) are detachably connected with the gas outlet of the gas pump (2) and the gas inlet of the sampling chamber (1), the two ends of the gas outlet pipe (6) are detachably connected with the gas outlet of the sampling chamber (1) and the gas inlet of the gas concentration detector (3), the two ends of the gas inlet pipe (7) are detachably connected with the gas inlet of the gas pump (2) and the gas path adjusting device (9), and the two ends of the gas outlet pipe (8) are detachably connected with the gas outlet of the gas concentration detector (3) and the gas path adjusting device (9).
8. A method for continuous observation of soil gas flux, characterized in that the use of the apparatus of claim 1 comprises the following steps:
A. digging a placing hole in soil, placing a sampling chamber (1) at the bottom of the placing hole, and filling the placing hole with soil above the sampling chamber (1);
B. the gas path adjusting device (9) adjusts the gas inlet pipe (7) and the gas outlet pipe (8) to be respectively and independently communicated with the outside, and the gas pump (2) is started to replace the gas in the sampling chamber (1);
C. the gas path adjusting device (9) adjusts the gas inlet pipe (7) and the gas outlet pipe (8) to be communicated, the gas inlet pipe (7) and the gas outlet pipe (8) are separated from the outside, and the gas concentration detector (3) is started to continuously detect the concentration of gas entering the sampling chamber (1) from the deep part of underground soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211426367.0A CN115808375A (en) | 2022-11-15 | 2022-11-15 | Continuous soil gas flux observation device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211426367.0A CN115808375A (en) | 2022-11-15 | 2022-11-15 | Continuous soil gas flux observation device and method |
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| Publication Number | Publication Date |
|---|---|
| CN115808375A true CN115808375A (en) | 2023-03-17 |
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| CN202211426367.0A Pending CN115808375A (en) | 2022-11-15 | 2022-11-15 | Continuous soil gas flux observation device and method |
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| CN (1) | CN115808375A (en) |
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- 2022-11-15 CN CN202211426367.0A patent/CN115808375A/en active Pending
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