Sampling and collecting device for measuring content of greenhouse gas in field soil

Abstract

The invention relates to the technical field of gas collection devices, in particular to a sampling and collecting device for measuring the content of greenhouse gas in field soil. Comprising a collection device and a field soil surface, a transmission device comprises a gas collection pipe and a miniature negative pressure pump, a collection device is fixedly connected with the outlet end of the transmission device, and target gas stably collected by the collection device is uniformly and efficiently transmitted to the collection device through the transmission device for temporary storage. Target gas in the collecting device and field soil can be absorbed into the collecting device to be sealed and temporarily stored, and therefore field convenient and efficient greenhouse gas collecting work is achieved. The device has good environmental adaptability, and ensures that the situation of larger error caused by non-uniform experimental conditions in the collected gas is avoided. Compared with a traditional gas collection device, the gas collection device is more convenient to disassemble and carry, so that collection of outgoing gas is more facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of gas collection devices, in particular to a sampling and collecting device for measuring greenhouse gas content in field soil. Background Art

[0002] Greenhouse gases are gaseous components in the atmosphere that absorb and emit infrared radiation. They play a key role in the Earth's greenhouse effect. These gases absorb thermal infrared radiation emitted by the Earth's surface, atmosphere, and clouds, and re-radiate it in the atmosphere, causing the Earth's surface temperature to rise. This phenomenon is known as the "greenhouse effect." In recent years, soil greenhouse gas emissions have required proper quantification. Carbon dioxide, methane, and nitric oxide account for approximately 87% of soil greenhouse gases. Therefore, measuring carbon dioxide, methane, and nitric oxide is representative of soil greenhouse gas levels. Understanding soil greenhouse gas levels requires specialized soil greenhouse gas collection equipment. The size, specifications, and components of the measurement equipment are closely related to the accuracy of the collection and observation.

[0003] The existing collection of soil greenhouse gases is generally divided into two types: One is to use a closed static box. The traditional gas collection box is generally large in size, has many components, and has a small scope of application. Although the large collection box will enhance the sampling effect, it has poor portability and a long operation time, which will cause gas leakage or reaction during the detection process, thereby affecting the experimental data and causing large errors in the experimental results; and the large box structure is relatively complex and cumbersome, requiring the use of more high-performance materials and precision accessories, as well as containing a variety of sensors and control systems, which will lead to relatively high manufacturing costs for traditional gas collection boxes, and difficult maintenance and repair work, requiring professional personnel to operate, which will increase maintenance costs. In addition, the complex structure and large size will increase the difficulty of transportation and handling; The other is the laboratory gas processing device. The data collected by it is of low reference value for understanding the greenhouse gas content in the soil. The main reason is that the device performs gas measurement in an ideal laboratory environment. The gas diversity in the soil sample is not high, and it is impossible to restore the true situation of soil greenhouse gases under changes in the external environment, which is not conducive to gas collection and the authenticity of the data is not high. In addition, some traditional gas collection devices are powered by gasoline and diesel. During the collection process, the device will consume diesel and gasoline and continuously produce greenhouse gases. Some greenhouse gases are discharged into the atmosphere, and others are dissolved by the soil. The greenhouse gases entering the soil increase the amount of gas contained in the soil itself, which will affect the accuracy of the experimental results. Summary of the Invention

[0004] The present invention aims to at least improve one of the technical problems existing in the prior art. To this end, the present invention provides a sampling and collecting device for measuring greenhouse gas content in field soil.

[0005] According to an embodiment of the first aspect of the present invention, a sampling and collecting device for measuring greenhouse gas content in field soil comprises: A collection device, the collection device being in direct contact with the soil surface in the field and being used to stably collect the target gas in the soil; A transmission device, comprising a gas collection pipe and a micro negative pressure pump, wherein the inlet end of the collection pipe is fixedly connected to the outlet end of the collection device, and the outlet end of the collection pipe is fixedly connected to the gas inlet of the micro negative pressure pump; The collecting device is fixedly connected to the output end of the transmission device, and the target gas stably collected by the collecting device is uniformly and efficiently transmitted to the collecting device for temporary storage through the transmission device. According to an embodiment of the present invention, a sampling and collection device for measuring greenhouse gas content in field soil is inserted vertically into the soil by inserting the collection device and simultaneously turning on the switch of the transmission device. The target gas in the collection device and field soil can be absorbed into the collection device and sealed and temporarily stored, thereby achieving convenient and efficient field greenhouse gas collection. This device supports the collection of multiple gases, including carbon dioxide, methane, and nitric oxide, reducing the steps and equipment used for gas collection, reducing collection costs, and alleviating the burden on collection personnel. The present invention also has good environmental adaptability and can adapt to various complex climatic conditions, ensuring stable operation in different environments, such as forests, farmlands, and wetlands, and ensuring that large errors in the collected gas due to inconsistent experimental conditions will not occur. This collection device abandons the traditional fuel-driven gas collection method and adopts a more energy-efficient electric drive design, which greatly reduces carbon emissions generated by its own operation and reduces the possibility of soil contamination, conforming to the development trend of low-carbon and environmental protection. Compared with traditional gas collection devices, it is more convenient to disassemble and carry, thus more conducive to the collection of outdoor gas.

[0006] In addition, the soil greenhouse gas collection device has the advantages of small footprint, low construction cost, and simple and convenient operation. It is suitable for the design of an integrated device and has important significance and development prospects in the collection of greenhouse gases in the wild in my country.

[0007] In a possible implementation of the first aspect, the collection device includes: A collector, the collector being a cylindrical structure with upper and lower openings; A top cover, which is fixedly mounted on the collector and is provided with a stirring device and an air inlet valve. The stirring device is electrically connected to a microcontroller and is used to stir the collected gas before collecting the target gas, thereby improving the accuracy of the target gas collection; A digital thermometer is fixedly mounted on the inner wall of the collector and is electrically connected to a signal input terminal of a microcontroller. Based on the temperatures of the soil and target gas inside the collector detected in real time by the digital thermometer, the controller updates and regulates the stirring device in real time to ensure uniform mixing inside the device, thereby preventing secondary dissolution of the target gas by the field soil, which would result in incomplete collected experimental data and affect data authenticity.

[0008] In a possible implementation of the first aspect, the top cover is made of an acrylic plate, the diameter of the top cover is larger than the diameter of the collector, and the connections between the top cover and the stirring device, the air inlet valve and the collector are all sealed to prevent greenhouse gases from reacting with the container and reducing measurement accuracy.

[0009] In a possible implementation of the first aspect, during measurement, the digital thermometer is in direct contact with the field soil, so that the measurement data is more accurate.

[0010] In a possible implementation of the first aspect, the collection device includes a gas collection bag and a connecting tube, wherein the gas collection bag is connected to the gas outlet of the negative pressure pump through the connecting tube. The gas collection bag is made of aluminum foil material, which is portable and lightweight while ensuring that the temporarily stored target gas does not react with the container. The gas collection bag made of aluminum foil material has better sealing performance, which is conducive to maintaining data reliability.

[0011] In a possible implementation of the first aspect, the collection tube and the connecting tube are both rubber hoses, which are low-cost and highly ductile, easy to carry, and particularly suitable for field collection.

[0012] In a possible implementation of the first aspect, the micro negative pressure pump operates in a continuous air intake and continuous air discharge gas collection mode with a gas volume range of 3L / min to 18L / min, which can efficiently and low-energy complete the collection of target gas in the soil and reduce the time spent on collecting the target gas.

[0013] In a possible implementation of the first aspect, the stirring device is a micro fan, including a motor, a rotating shaft and fan blades. The motor is fixedly mounted on the top cover, and the rotating shaft coaxially connected to the motor passes through the top cover and is fixedly connected to the fan blades located in the inner cavity of the collector, for stirring the target gas and improving the accuracy of target gas collection.

[0014] According to a second embodiment of the present invention, a sampling and collecting device for measuring greenhouse gas content in field soil further comprises: An auxiliary fixing device is fixed to the collector and is used to stabilize the collection device so that the collected target gas data is more accurate.

[0015] In a possible implementation of the second aspect, the auxiliary fixing device includes a high-density foam board and a stainless steel wire mesh, wherein a through hole is opened in the middle of the high-density foam board to accommodate the collector passing through, and the stainless steel wire mesh is arranged at the bottom of the high-density foam board and connected to the high-density foam board to form a stable structure.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 2 is a schematic structural diagram of a sampling and collecting device for measuring greenhouse gas content in field soil according to an embodiment of the present invention.

[0019] Reference numerals: Stirring device 1, air inlet valve 2, top cover 3, digital thermometer 4, collector 5, switch 7, micro negative pressure pump 8, air inlet 9, air outlet 10, air sampling bag 11, air sampling tube 12, connecting tube 13. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] In the specification, claims, and accompanying drawings of this application, the terms "first," "second," "third," and the like are used to distinguish different objects and are not used to describe a particular order. Furthermore, the terms "including," "comprising," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a list of steps or elements may be included, or alternatively, steps or elements not listed may be included, or other steps or elements may be included that are inherent to the process, method, product, or apparatus.

[0024] Only portions relevant to the present application are shown in the accompanying drawings, not all of them. Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the various operations (or steps) as sequential processes, many of the operations can be performed in parallel, concurrently, or simultaneously. In addition, the order of the various operations can be rearranged. The process can be terminated when its operations are completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0025] As used in this specification, the terms "component," "module," "system," "unit," and the like are used to refer to computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a unit can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or distributed between two or more computers. In addition, these units can be executed from various computer-readable media having various data structures stored thereon. Units can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from a second unit interacting with another unit in a local system, a distributed system, and / or a network, such as the Internet, which interacts with other systems via signals).

[0026] Example 1 See Figure 1 As shown, this embodiment provides a sampling and collecting device for measuring greenhouse gas content in field soil, which includes: A collection device, the collection device being in direct contact with the soil surface in the field and being used to stably collect the target gas in the soil; A transmission device, comprising a gas collection pipe 12 and a micro negative pressure pump 8, wherein the micro negative pressure pump 8 is provided with a switch 7, an air inlet 9, and an air outlet 10, the inlet end of the collection pipe 12 is fixedly connected to the outlet end of the collection device, and the outlet end of the collection pipe 12 is fixedly connected to the air inlet 9 of the micro negative pressure pump 8; The collecting device is fixedly connected to the output end of the transmission device, and the target gas stably collected by the collecting device is uniformly and efficiently transmitted to the collecting device for temporary storage through the transmission device. According to an embodiment of the present invention, a sampling and collection device for measuring greenhouse gas content in field soil is inserted vertically into the soil by inserting the collection device and simultaneously turning on the switch of the transmission device. The target gas in the collection device and field soil can be absorbed into the collection device and sealed and temporarily stored, thereby achieving convenient and efficient field greenhouse gas collection. This device supports the collection of multiple gases, including carbon dioxide, methane, and nitric oxide, reducing the steps and equipment used for gas collection, reducing collection costs, and alleviating the burden on collection personnel. The present invention also has good environmental adaptability and can adapt to various complex climatic conditions, ensuring stable operation in different environments, such as forests, farmlands, and wetlands, and ensuring that large errors in the collected gas due to inconsistent experimental conditions will not occur. This collection device abandons the traditional fuel-driven gas collection method and adopts a more energy-efficient electric drive design, which greatly reduces carbon emissions generated by its own operation and reduces the possibility of soil contamination, conforming to the development trend of low-carbon and environmental protection. Compared with traditional gas collection devices, it is more convenient to disassemble and carry, thus more conducive to the collection of outdoor gas.

[0027] It should be noted that the collection device includes: The collector 5 is a cylindrical structure with upper and lower openings; A top cover 3, which is fixedly mounted on the collector 5. A stirring device 1 and an air inlet valve 2 are mounted on the top cover 3. The stirring device 1 is electrically connected to a microcontroller and is used to stir the collected gas before collecting the target gas, thereby improving the accuracy of the target gas collection. A digital thermometer 4 is fixedly mounted on the inner wall of the collector 5 and is electrically connected to the signal input terminal of the microcontroller. The controller updates and regulates the stirring device 1 in real time based on the temperature of the soil and the target gas inside the collector detected in real time by the digital thermometer 4, so that the internal mixing is uniform, thereby avoiding secondary dissolution of the target gas by the field soil, which would result in incomplete collected experimental data and affect the authenticity of the data.

[0028] It should be noted that the top cover 3 is made of acrylic plate, the diameter of the top cover 3 is larger than the diameter of the collector 5, and the connections between the top cover 3 and the stirring device 1, the air inlet valve 2 and the collector 5 are all sealed to prevent greenhouse gases from reacting with the container and reducing measurement accuracy.

[0029] It should be noted that, during measurement, the digital thermometer 4 is in direct contact with the field soil, so that the measurement data is more accurate.

[0030] It should be noted that the collection device includes a gas collection bag 11 and a connecting pipe 13, wherein the gas collection bag 11 is connected to the gas outlet 10 of the negative pressure pump 8 through the connecting pipe 13. The gas collection bag 11 is made of aluminum foil material, which is portable and lightweight while ensuring that the temporarily stored target gas will not react with the container. The gas collection bag made of aluminum foil material has better sealing performance, which is conducive to maintaining the reliability of the data.

[0031] It should be noted that the collection tube 12 and the connecting tube 13 are both rubber hoses, which are low in cost and highly ductile, easy to carry and particularly suitable for field collection.

[0032] It should be noted that the micro negative pressure pump 8 operates in a continuous air intake and continuous air discharge mode, with a gas volume range of 3L / min to 18L / min. It can efficiently and low-energy complete the collection of target gas in the soil, reducing the time spent on collecting the target gas.

[0033] It should be noted that the stirring device 1 is a miniature fan, including a motor, a rotating shaft and fan blades. The motor is fixedly mounted on the top cover 3. The rotating shaft coaxially connected to the motor passes through the top cover 3 and is fixedly connected to the fan blades located in the inner cavity of the collector 5, which is used to stir the target gas and improve the accuracy of target gas collection.

[0034] Specifically, this embodiment provides an example of a sampling and collection device. The specific dimensions of the micro negative pressure pump are 175mm*125mm*86mm, the volume of the gas sampling bag 11 is 3L, the diameter of the collector 5 is 100mm, the height is 100mm, and the wall thickness is 5mm. This device has the advantages of small footprint, low construction cost, simple and convenient operation, and is suitable for the design of an integrated device. It has important significance and development prospects in the collection of greenhouse gases in the wild in my country.

[0035] Example 2 See Figure 1 As shown, this embodiment is further improved on the basis of embodiment 1, and further includes: An auxiliary fixing device is fixed to the collector 5 and is used to stabilize the collection device so that the collected target gas data is more accurate.

[0036] It should be noted that the auxiliary fixing device includes a high-density foam board 6 and a stainless steel wire mesh, wherein a through hole is opened in the middle of the high-density foam board 6 to accommodate the collector 5 to pass through, and the stainless steel wire mesh is arranged at the bottom of the high-density foam board 6 and connected to the high-density foam board 6 to form a stable structure.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation to the invention.

[0038] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0039] Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Mentioning "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present embodiment application. The appearance of this phrase in various positions in the specification does not necessarily mean that they are all the same embodiments, nor are they independent or alternative embodiments that are mutually exclusive with other embodiments. It can be understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0040] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A sampling and collecting device for measuring greenhouse gas content in field soil, characterized in that: include: A collection device, the collection device being in direct contact with the soil surface in the field and used for stably collecting the target gas in the soil; A transmission device, the transmission device comprising a gas collection pipe (12) and a micro negative pressure pump (8), the inlet end of the collection pipe (12) being fixedly connected to the outlet end of the collection device, and the outlet end of the collection pipe (12) being fixedly connected to the gas inlet (9) of the micro negative pressure pump (8); The collecting device is fixedly connected to the output end of the transmission device, and the target gas stably collected by the collecting device is uniformly and efficiently transmitted to the collecting device for temporary storage through the transmission device.

2. The sampling and collecting device for measuring greenhouse gas content in field soil according to claim 1, characterized in that: The collection device includes: A collector (5), the collector (5) being a cylindrical structure with upper and lower openings; A top cover (3), the top cover (3) is fixedly mounted on the collector (5), a stirring device (1) and an air inlet valve (2) are mounted on the top cover (3), and the stirring device (1) is electrically connected to a microcontroller; A digital thermometer (4) is fixedly mounted on the inner wall of the collector (5), and the digital thermometer (4) is electrically connected to a signal input terminal of a microcontroller.

3. The sampling and collecting device for measuring greenhouse gas content in field soil according to claim 2, characterized in that: Also includes: An auxiliary fixing device is fixed to the collector (5) and is used to stabilize the collecting device.

4. The sampling and collecting device for measuring greenhouse gas content in field soil according to claim 2, characterized in that: The top cover (3) is made of an acrylic plate. The diameter of the top cover (3) is larger than the diameter of the collector (5). The connections between the top cover (3), the stirring device (1), the air inlet valve (2) and the collector (5) are all sealed.

5. The sampling and collecting device for measuring greenhouse gas content in field soil according to claim 2, characterized in that: During measurement, the digital thermometer (4) is in direct contact with the field soil.

6. The sampling and collecting device for measuring greenhouse gas content in field soil according to claim 1, characterized in that: The collecting device comprises an air collection bag (11) and a connecting pipe (13), wherein the air collection bag (11) is connected to the air outlet (10) of the negative pressure pump (8) via the connecting pipe (13), and the air collection bag (11) is made of aluminum foil material.

7. The sampling and collecting device for measuring greenhouse gas content in field soil according to claim 3, characterized in that: The auxiliary fixing device comprises a foam plate (6) and a stainless steel wire mesh, wherein a through hole for accommodating the collector (5) is opened in the middle of the foam plate (6), and the stainless steel wire mesh is arranged at the bottom of the foam plate (6) and connected to the foam plate (6) to form a stable structure.

8. The sampling and collecting device for measuring greenhouse gas content in field soil according to claim 1 or 6, characterized in that: The collecting tube (12) and the connecting tube (13) are both rubber hoses.

9. The sampling and collecting device for measuring greenhouse gas content in field soil according to claim 1, characterized in that: The micro negative pressure pump (8) operates in a continuous air intake and continuous air discharge mode, with an air volume range of 3 L / min to 18 L / min.

10. The sampling and collecting device for measuring greenhouse gas content in field soil according to claim 2, characterized in that: The stirring device (1) is a micro fan comprising a motor, a rotating shaft and fan blades. The motor is fixedly mounted on the top cover (3). The rotating shaft coaxially connected to the motor passes through the top cover (3) and is fixedly connected to the fan blades located in the inner cavity of the collector (5).

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