CN111089760A - Device for collecting gas in soil by balance method - Google Patents
Device for collecting gas in soil by balance method Download PDFInfo
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- CN111089760A CN111089760A CN202010103639.8A CN202010103639A CN111089760A CN 111089760 A CN111089760 A CN 111089760A CN 202010103639 A CN202010103639 A CN 202010103639A CN 111089760 A CN111089760 A CN 111089760A
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- gas
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- sampling
- support frame
- soil
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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
- G01N1/2294—Sampling soil gases or the like
Abstract
The utility model provides a device of gaseous in soil is gathered to balancing method, mainly includes gaseous sampling bag, sample memory, quick screwed joint, sampling pipe, spherical support frame, waterproof ventilated membrane, spherical protection casing. The gas sampling bag is connected with the sample storage device through the quick-screwing connector I, and the sample storage device other end is connected with the gas balance collection system through the quick-screwing connector II, and the inside of the gas balance collection system is spherical support frame, and the spherical support frame is covered with waterproof ventilated membrane outward, and the outside is globular protection casing, and the quick-screwing connector II runs through spherical support frame, waterproof ventilated membrane and globular protection casing. The invention avoids the condition that the sample cannot be collected in summer due to water inlet in the gas collecting device in the frozen soil area, and simultaneously can realize a helium purging system, thereby avoiding the pollution of the sampling system by greenhouse gases in the atmosphere. The balance sampling device is separated from the sample storage device, and sampling is quick and convenient.
Description
Technical Field
The invention relates to the field of freezing rings and climate change, in particular to a device for collecting gas in soil by a balance method.
Background
Research has found that human activities have changed, and continues to change the composition of the earth's surface and atmosphere. Indirectly or directly change the balance of surface energy balance, and further promote climate change. Greenhouse gases are important factors promoting global climate change, and therefore research on the source, sink and conversion mechanism of greenhouse gases becomes important content of global change discipline. The existing research finds that the concentration of greenhouse gases in soil can reach more than one hundred times of that in the atmosphere, and the method is an important carbon reservoir and is also an important ring in the global carbon cycle research. Frozen earth is sensitive to climate change response, and stored carbon is susceptible to climate change and is released into the atmosphere, exacerbating the global warming trend. Therefore, the carbon cycle research in frozen soil becomes a hot spot of the global change discipline.
In the global carbon cycle research, the isotope tracing technology is widely applied, and abundant carbon isotope data are accumulated. Isotope techniques can be used to resolve carbon sources in carbon cycling studies of soil. Researches show that greenhouse gases in soil mainly come from decomposition of organic matters in soil by bacteria, but specific sources have great geographical differences and need to be further analyzed by utilizing carbon isotopes. However, the gas production process of the soil is slow, and the gas in the soil is extracted in a short time, which can destroy the balance of the gas in the existing soil, so that the greenhouse gas generates a strong isotope fractionation effect in the diffusion process, and the research result has great deviation. The soil gas collected by the equilibrium sampling method can reflect the original condition of the soil gas more truly. However, when the gas in the soil is collected in the frozen soil area, the soil water is gathered in the sampler, so that the sample cannot be collected in summer.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the device for collecting the gas in the soil by the balance method, which keeps the original state of the collected soil gas and avoids the great deviation of the research result.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a device for collecting gas in soil by a balance method mainly comprises a gas sampling bag, a sample storage device, a quick-screwing joint I, a sampling pipe, a quick-screwing joint II and a balance sampling device, wherein the gas balance sampling device is an integral structure consisting of a spherical support frame, a waterproof breathable film and a spherical protective cover; the gas sampling bag is communicated with the sample storage device through the quick-screwing connector I, and the sample storage device is communicated with the gas balance acquisition device through the quick-screwing connector II.
The inside of above-mentioned gas balance collection system is spherical support frame, and the outside is equipped with globular protection casing, still is equipped with waterproof ventilated membrane between spherical support frame and globular protection casing.
The spherical protective cover is densely distributed with small holes.
The quick-screwing joint II penetrates through the spherical support frame, the waterproof breathable film and the spherical protective cover. The invention has the advantages and beneficial effects that:
the invention avoids the phenomenon that the sample cannot be collected in summer due to water inlet in the device when the soil gas is collected in the frozen soil area.
The invention adopts helium to purge the sampling system, thereby avoiding the pollution of the sampling system by greenhouse gases in the atmosphere.
The balance sampling device is separated from the gas storage device, and is quick and convenient to replace and sample.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
As shown in figure 1, the device for collecting gas in soil by a balance method mainly comprises a gas sampling bag 1, a sample storage 2, a quick-screwing connector I3, a sampling pipe 4, a quick-screwing connector II 5 and a gas balance collecting device 6.
The gas balance acquisition device 6 is an integral structure consisting of a spherical support frame 61, a waterproof breathable film 62 and a spherical protective cover 63.
The inside of gas balance collection system 6 is spherical support 61, and the waterproof ventilated membrane 62 is covered outside spherical support 61, and the outside is equipped with globular protection casing 63.
The quick-screwing joint II 5 penetrates through the spherical support frame 61, the waterproof breathable film 62 and the spherical protective cover 63.
Examples
When the device for collecting the gas in the soil by the balance method is placed in the field for the first time, the sample storage device 2 is communicated with the gas balance collection device 6, the gas sampling bag 1 filled with helium is communicated with the sample storage device 2, and the helium is used for driving the air in the system to avoid the greenhouse gas pollution in the atmosphere. And the gas balance acquisition device 6 is buried in the frozen soil, and the sample storage device 2 is placed on the ground surface, so that the replacement is convenient. At the moment, the sampling pipe 4 can be disconnected from the sample storage device 2, the sampling pipe 4 is sealed, gas in the gas balance acquisition device 6 is balanced with gas in soil, and the sample storage device 2 and the gas balance acquisition device 6 are communicated when sampling is carried out.
Except for the first placement, which requires purging the system with helium, only the helium filled sample reservoir 2 needs to be replaced during subsequent sampling.
Waterproof ventilated membrane 62 depends on spherical support frame 61, can keep the inner space of gaseous balanced collection system 6, also can prevent soil water entering.
The spherical protective cover 63 has high rigidity, and can protect the fragile waterproof breathable film 62 from being damaged, and the small holes are densely distributed in the spherical protective cover 63, so that gas in soil can freely enter the inner space of the gas balance acquisition device 6.
Claims (3)
1. The utility model provides a gaseous device in soil is gathered to balancing method, mainly includes gaseous sampling bag (1), sample memory (2), soon screws up and connects I (3), sampling pipe (4), soon screws up and connects II (5), balanced sampling device (6), its characterized in that: the gas balance acquisition device (6) is of an integral structure consisting of a spherical support frame (61), a waterproof breathable film (62) and a spherical protective cover (63); the gas sampling bag (1) is communicated with the sample storage device (2) through a quick-screwing connector I (3), and the sample storage device (2) is communicated with the gas balance acquisition device (6) through a quick-screwing connector II (5); a spherical protective cover (63) is arranged outside the gas balance acquisition device (6), and a spherical support frame (61) is arranged inside the gas balance acquisition device; and a waterproof breathable film (62) is arranged between the spherical support frame (61) and the spherical protective cover (63).
2. The apparatus for the balanced extraction of gases from soil as claimed in claim 1 wherein: the spherical protective cover (63) is densely distributed with small holes.
3. The apparatus for the balanced extraction of gases from soil as claimed in claim 1 wherein: the quick-screwing joint II (5) penetrates through the spherical support frame (61), the waterproof breathable film (62) and the spherical protective cover (63).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010103639.8A CN111089760A (en) | 2020-02-20 | 2020-02-20 | Device for collecting gas in soil by balance method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010103639.8A CN111089760A (en) | 2020-02-20 | 2020-02-20 | Device for collecting gas in soil by balance method |
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| Publication Number | Publication Date |
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| CN111089760A true CN111089760A (en) | 2020-05-01 |
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| CN202010103639.8A Pending CN111089760A (en) | 2020-02-20 | 2020-02-20 | Device for collecting gas in soil by balance method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454121A (en) * | 2012-08-21 | 2013-12-18 | 中国科学院、水利部成都山地灾害与环境研究所 | Portable soil air in-situ collector |
| CN203849065U (en) * | 2014-05-06 | 2014-09-24 | 福建省农业科学院农业生态研究所 | Soil profile air collecting device |
| CN105571910A (en) * | 2015-12-11 | 2016-05-11 | 中国科学院东北地理与农业生态研究所 | Device for collecting greenhouse gas of wetland soil in freezing-thawing period and method for collecting gas by virtue of device |
| CN105784861A (en) * | 2016-03-04 | 2016-07-20 | 湖南农业大学 | Soil gas collecting device and gas collecting method |
| CN206399708U (en) * | 2017-01-20 | 2017-08-11 | 中国科学院新疆生态与地理研究所 | A kind of saturating formula soil profile gas collecting device of film |
| CN107063775A (en) * | 2017-03-06 | 2017-08-18 | 华南理工大学 | A kind of simple type deep soil gas sampler and its method for sampling |
| CN108195633A (en) * | 2016-12-08 | 2018-06-22 | 天津文佳科技有限公司 | A kind of underground gas harvester |
| CN108444776A (en) * | 2018-04-08 | 2018-08-24 | 湖北大学 | The sampler and its sampling method of soil column longitudinal direction soil layer gas |
-
2020
- 2020-02-20 CN CN202010103639.8A patent/CN111089760A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454121A (en) * | 2012-08-21 | 2013-12-18 | 中国科学院、水利部成都山地灾害与环境研究所 | Portable soil air in-situ collector |
| CN203849065U (en) * | 2014-05-06 | 2014-09-24 | 福建省农业科学院农业生态研究所 | Soil profile air collecting device |
| CN105571910A (en) * | 2015-12-11 | 2016-05-11 | 中国科学院东北地理与农业生态研究所 | Device for collecting greenhouse gas of wetland soil in freezing-thawing period and method for collecting gas by virtue of device |
| CN105784861A (en) * | 2016-03-04 | 2016-07-20 | 湖南农业大学 | Soil gas collecting device and gas collecting method |
| CN108195633A (en) * | 2016-12-08 | 2018-06-22 | 天津文佳科技有限公司 | A kind of underground gas harvester |
| CN206399708U (en) * | 2017-01-20 | 2017-08-11 | 中国科学院新疆生态与地理研究所 | A kind of saturating formula soil profile gas collecting device of film |
| CN107063775A (en) * | 2017-03-06 | 2017-08-18 | 华南理工大学 | A kind of simple type deep soil gas sampler and its method for sampling |
| CN108444776A (en) * | 2018-04-08 | 2018-08-24 | 湖北大学 | The sampler and its sampling method of soil column longitudinal direction soil layer gas |
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Effective date of registration: 20210825 Address after: 730000 No.318 Donggang West Road, Chengguan District, Lanzhou City, Gansu Province Applicant after: NORTHWEST INSTITUTE OF ECO-ENVIRONMENT AND RESOURCES, CHINESE ACADEMY OF SCIENCES Address before: 730000 Gansu city of Lanzhou province Donggang West Road No. 320 Applicant before: COLD AND ARID REGIONS ENVIRONMENTAL AND ENGINEERING Research Institute,CHINESE ACADEMY OF SCIENCES |
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