A greenhouse gas automatic sampling device

Abstract

The present invention relates to the technical field of greenhouse gas sampling, and specifically proposes an automatic greenhouse gas sampling device, comprising: a static box, a sampling mechanism, a lifting roller mechanism, a rotating stirring and mixing mechanism and a sealing mechanism. The present invention cooperates with the sealing mechanism, the rotating stirring and mixing mechanism and the sampling mechanism to seal the lower end of the static box before sampling and stir the gas in the static box evenly through the rotating stirring and mixing mechanism. During sampling, the sampling lifting group drives the lower end of the sampling flexible tube to move downward step by step for segmented sampling, and collects gas at different heights in the static box, thereby avoiding the problem of repeated sampling due to inaccurate gas collection, thereby effectively improving the accuracy of room temperature gas collection and the efficiency of gas monitoring.

Description

Technical Field

[0001] The invention relates to the technical field of greenhouse gas sampling, and specifically proposes an automatic greenhouse gas sampling device. Background Art

[0002] Greenhouse gas sampling technology is commonly used to monitor the concentrations of greenhouse gases such as carbon dioxide, methane and nitrous oxide in the environment. It is usually carried out through a static box collection method. The static box is placed on the ground and the ground area is sealed for a certain period of time to capture gases released from the soil. When it is necessary to measure greenhouse gas emissions, the gas is collected through the sampling port on the box and drawn into a sampling bag. The sampling bag is then brought back to the laboratory for analysis and testing. This is of great significance to environmental protection and climate change research.

[0003] Static boxes are generally made of transparent materials to allow light to pass through without interfering with the ecological processes inside, and are widely used in grasslands, wetlands, forest floors and other important places for greenhouse gas emissions.

[0004] The traditional sampling method is that a designated person uses a syringe to extract the gas in the static box at a fixed point, then injects the gas in the syringe into a sampling bag, and then takes the sampling bag back to the laboratory for analysis and testing. There are also some gas sampling devices at present, but their functions are not comprehensive enough and their performance is poor, resulting in uneven dispersion of carbon dioxide, methane and nitrous oxide in the gas in the static box. It needs to be collected repeatedly, which affects the accuracy of gas collection and the efficiency of gas monitoring. Therefore, the sampling method and process need to be optimized and improved. Summary of the invention

[0005] In view of the above problems, an embodiment of the present application provides an automatic greenhouse gas sampling device to solve the technical problems in the related art.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solution: an automatic sampling device for greenhouse gases, comprising: a static box and a sampling mechanism installed on the top of the static box.

[0007] The static box comprises a rectangular frame, a sealing mechanism is installed in the rectangular frame at the bottom of the rectangular frame, a fixed plate and a transparent plate are installed in the rectangular frame at the top, and transparent plates are also installed in four rectangular frames distributed circumferentially of the rectangular frame.

[0008] A rotating stirring and mixing mechanism connected between four vertical sections is installed in the rectangular frame, and a lifting roller mechanism is installed at the bottom of the rectangular frame.

[0009] The sealing mechanism includes a plurality of rotating shafts rotatably connected and evenly arranged between two corresponding horizontal sections on the lower side of the rectangular frame, a rotating blade is fixedly sleeved on the rotating shaft, a sealing assembly is arranged between two adjacent rotating blades, and an opening and closing driving group is installed on the rectangular frame to drive the rotating shaft to rotate to a horizontal state to close the bottom of the rectangular frame.

[0010] In one possible implementation, the rotating stirring and mixing mechanism includes a fixed frame connected between four vertical sections of the rectangular frame and arranged symmetrically up and down, and a stirring shaft is connected to the upper and lower fixed frames for rotation, and a plurality of stirring blades arranged evenly are installed on the side wall of the stirring shaft.

[0011] In one possible implementation, the opening and closing drive group includes a mounting groove formed on one of the horizontal sections on the lower side of the rectangular frame that is perpendicular to the axis of the rotating shaft. After the multiple rotating shafts are inserted into the mounting groove, gears are fixedly sleeved thereon. A moving bar is slidably connected in the mounting groove. The moving bar is provided with racks that mesh with the multiple gears for transmission. A waist-shaped groove that is connected to the mounting groove is formed on the outer wall of the rectangular frame. A push rod that passes through the waist-shaped groove is installed on the moving bar.

[0012] In one possible implementation, the sealing assembly includes a rubber sealing sheet. Except for the two rotating blades located on both sides which are close to the inner side wall of the rectangular frame and have an arc-shaped structure, the side walls of two adjacent rotating blades that are close to each other and arranged along their width direction are all inclined. The inclined side surfaces of the rotating blades are installed with rubber sealing sheets, and a matching seal is installed in the rectangular frame to cooperate with the rotating blades with the arc-shaped side walls for sealing.

[0013] In a possible implementation, the mating seal is composed of a strip arc seat mounted on the inner wall of the rectangular frame and an arc-shaped rubber strip mounted on the arc surface of the strip arc seat.

[0014] In one possible implementation, the lifting roller mechanism includes a lifting frame, and supplementary plates are installed on the tops of the four horizontal sections of the lifting frame. The lower end of the rectangular frame is slidably connected between the four supplementary plates. The lifting frame is provided with a groove opposite to the waist-shaped groove. Supplementary ear seats are installed at the four corners of the lifting frame. Universal wheels are installed at the lower ends of the supplementary ear seats. A locking group for locking the static box is provided on the supplementary plate.

[0015] In one possible implementation, the locking group includes sliders installed on the outer walls of the four horizontal sections on the lower side of the rectangular frame, a supplementary plate is provided with a sliding groove slidably connected to the slider, and a stopper inserted into the sliding groove is slidably connected to the supplementary plate.

[0016] In a possible implementation, a protective gasket is installed at the bottom of the rectangular frame.

[0017] The sampling mechanism includes a sampling transmission box, a sampling flexible tube is installed at the bottom of the sampling transmission box, which passes through a fixed plate and then enters a static box, a sampling lifting group is installed in the rectangular frame, which drives the sampling flexible tube to move up and down away from one end of the sampling transmission box, an air pump is arranged in the sampling transmission box, and an outer wall is provided with inflation tubes arranged in sequence along its length direction, and a valve is provided in the sampling transmission box to control the on and off of the end of the inflation tube.

[0018] In one possible implementation, the sampling lifting group includes a rectangular frame located directly below the sampling transmission box, and two vertical sections are connected together with a lifting bar that slides up and down. A fixing ring is installed on the side wall of the lifting bar, and the end of the sampling flexible tube away from the sampling transmission box is inserted into the fixing ring. A tensioning assembly for tensioning the sampling flexible tube is installed between the sampling transmission box and the lifting bar.

[0019] In one possible implementation, the tensioning assembly includes an elastic telescopic rod and two fixed ear plates installed at the bottom of the fixed plate, a tensioning roller is installed at the lower end of the elastic telescopic rod, a guide wheel is rotatably connected between the two fixed ear plates, the sampling flexible tube is wrapped around the tensioning roller and the guide wheel, and a buckle is installed at the lower end of the elastic telescopic rod to limit the sampling flexible tube.

[0020] The above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. The present invention cooperates with a sealing mechanism, a rotating stirring and mixing mechanism and a sampling mechanism. Before sampling, the lower end of the static box is sealed and the gas in the static box is evenly stirred through the rotating stirring and mixing mechanism. During sampling, the sampling lifting group drives the lower end of the sampling flexible tube to move downward step by step for segmented sampling, and collects gas at different heights in the static box, thereby avoiding the problem of repeated sampling due to inaccurate gas collection, thereby effectively improving the accuracy of room temperature gas collection and the efficiency of gas monitoring.

[0021] 2. The opening and closing drive group in the present invention drives the rotating shaft to drive the rotating blades to rotate until the rubber sealing sheets on the inclined surfaces of the opposite surfaces of two adjacent rotating blades are tightly pressed against each other, thereby making the rotating blades tightly pressed against each other and sealing each other, thereby preventing the soil from continuing to release gas into the static box during the sampling process, thereby reducing the sampling accuracy.

[0022] 3. The present invention drives the static box to move by means of a lifting roller mechanism, thereby improving the convenience of moving the static box. When the static box moves to the location where sampling is required, the block is manually pulled to remove the block from under the slider so as to no longer support the slider. The static box moves downward and contacts the ground at the sampling location, so that the gas is located in the static box, simulating the state of the gas indoors, and further improving the efficiency of greenhouse gas sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 It is a first three-dimensional structural schematic diagram of the present invention.

[0025] Figure 2 The present invention Figure 1 A local enlarged schematic diagram of point A.

[0026] Figure 3 The present invention Figure 1 A partial enlarged schematic diagram of point B.

[0027] Figure 4 It is a schematic cross-sectional view of the spring telescopic rod of the present invention.

[0028] Figure 5 It is a structural schematic diagram of the opening and closing drive group of the present invention.

[0029] Figure 6 It is a second three-dimensional structural schematic diagram of the present invention.

[0030] Figure 7 It is a main sectional view of the present invention.

[0031] Figure 8 The present invention Figure 7 A partial enlarged schematic diagram of point C.

[0032] Figure numerals: 1, static box; 10, rectangular frame; 101, protective gasket; 11, transparent plate; 12, fixed plate; 2, sampling mechanism; 20, sampling transmission box; 21, sampling flexible tube; 22, sampling lifting group; 220, lifting strip; 221, fixing ring; 230, elastic telescopic rod; 231, fixing ear plate; 232, tensioning roller; 233, guide wheel; 234, buckle; 23, inflation tube; 3, rotating stirring and mixing mechanism; 30, fixing frame; 31, stirring shaft; 32, stirring blade Plate; 4, sealing mechanism; 40, rotating shaft; 41, rotating blade; 42, sealing assembly; 420, rubber sealing plate; 421, strip arc seat; 422, arc rubber strip; 43, opening and closing drive group; 430, mounting groove; 431, gear; 432, rack; 433, moving strip; 434, waist-shaped groove; 435, push rod; 5, lifting roller mechanism; 50, lifting frame; 51, supplementary plate; 52, groove; 53, universal wheel; 54, locking group; 540, slider; 541, stopper. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] See also Figure 1 , an automatic sampling device for greenhouse gases, comprising: a static box 1 and a sampling mechanism 2 installed on the top of the static box 1.

[0036] See also Figure 1 , Figure 6 and Figure 7 The static box 1 includes a rectangular frame 10, a sealing mechanism 4 is installed in the rectangular frame at the bottom of the rectangular frame 10, a fixed plate 12 and a transparent plate 11 distributed in half are installed in the rectangular frame at the top, and transparent plates 11 are also installed in four rectangular frames distributed circumferentially of the rectangular frame 10.

[0037] See also Figure 1 and Figure 6 A rotating stirring and mixing mechanism 3 connected between four vertical sections is installed in the rectangular frame 10, and a lifting roller mechanism 5 is installed at the bottom of the rectangular frame 10. The static box 1 is moved by the lifting roller mechanism 5, thereby improving the convenience of moving the static box 1.

[0038] It is particularly noted that the present invention sets a solar power supply system and an energy storage system outside the static box 1 to power the sampling system and the monitoring system to ensure that the equipment continues to operate in remote areas, the wild or without power supply. The shells of the solar power supply system and the energy storage system are made of waterproof and dustproof materials to adapt to various environmental conditions; the rectangular frame 10 is also provided with temperature sensors, humidity and other sensors required for collection and use, and the static box 1 is also provided with a data transmission system, a monitoring system and a positioning system. The data transmission system: the collected data is stored in the internal memory and regularly sent to the designated data center via a wireless network, and the data is transmitted to the cloud platform or the local server via a wireless network; the monitoring system is 360-degree monitoring and has a perception function. When people, animals, birds, etc. are found, it can automatically trigger a notification to the person in charge, remotely view the real-time picture, and issue a remote voice or expulsion alarm; the positioning system has a positioning module (the above structures are not shown in the figure).

[0039] See also Figure 1 , Figure 5 , Figure 7 and Figure 8 The sealing mechanism 4 includes a plurality of rotating shafts 40 rotatably connected and evenly arranged between two corresponding horizontal sections on the lower side of the rectangular frame 10, a rotating blade 41 is fixedly sleeved on the rotating shaft 40, a sealing assembly 42 is arranged between two adjacent rotating blades 41, and an opening and closing driving group 43 is installed on the rectangular frame 10 to drive the rotating shaft 40 to drive the rotating blades 41 to rotate to a horizontal state to close the bottom of the rectangular frame 10.

[0040] See also Figure 1 and Figure 6 The rotating stirring and mixing mechanism 3 includes a fixed frame 30 connected between the four vertical sections of the rectangular frame 10 and arranged symmetrically up and down. A stirring shaft 31 is connected to the upper and lower fixed frames 30 for rotation together, and a plurality of stirring blades 32 arranged evenly are installed on the side wall of the stirring shaft 31.

[0041] The sides and top of the static box 1 are transparent, allowing light to pass through without interfering with the internal ecological process. After the static box 1 is moved to the sampling site by the lifting roller mechanism 5, the static box 1 moves downward and contacts the ground at the sampling site, thereby closing the ground area for a certain period of time to capture the gas released from the soil.

[0042] Before sampling of greenhouse gases is required, the lower end of the rectangular frame 10 is first sealed by the sealing mechanism 4 so that the gas released by the soil in the static box 1 is in a sealed space, and then the external drive motor connected to the stirring shaft 31 is started to drive the stirring shaft 31 to rotate. The stirring shaft 31 drives the stirring blades 32 to rotate to stir the gas in the static box 1 evenly, thereby avoiding uneven dispersion of carbon dioxide, methane, etc. in the gas in the static box 1, which affects the accuracy of gas sampling.

[0043] See also Figure 1 , Figure 2 and Figure 5 The opening and closing driving group 43 includes a mounting groove 430 formed on one of the horizontal sections on the lower side of the rectangular frame 10 which is perpendicular to the axis of the rotating shaft 40. After the multiple rotating shafts 40 are inserted into the mounting groove 430, they are all fixedly sleeved with gears 431. A moving bar 433 is slidably connected in the mounting groove 430. The moving bar 433 is provided with racks 432 which are meshed with the multiple gears 431 for transmission. A waist-shaped groove 434 which is connected to the mounting groove 430 is formed on the outer wall of the rectangular frame 10. A push rod 435 which passes through the waist-shaped groove 434 is installed on the moving bar 433.

[0044] See also Figure 7 and Figure 8The sealing assembly 42 includes a rubber sealing sheet 420. Except for the two rotating blades 41 located on both sides, which are close to the inner wall of the rectangular frame 10 and have an arc-shaped structure, the side walls of the two adjacent rotating blades 41 that are close to each other and arranged along their width direction are all inclined. The rubber sealing sheet 420 is installed on the inclined side of the rotating blade 41, and a matching seal that cooperates with the rotating blade 41 with an arc-shaped side wall for sealing is installed in the rectangular frame 10.

[0045] An external driving source or manual push rod 435 drives the rack 432 to move through the moving bar 433. The rack 432 drives the rotating shaft 40 to rotate through the meshing transmission with the gear 431 during the movement. The rotating shaft 40 drives the rotating blades 41 to rotate until the rubber sealing sheets 420 on the inclined surfaces of the opposite surfaces of two adjacent rotating blades 41 are tightly pressed against each other, thereby making the adjacent rotating blades 41 tightly sealed, avoiding the problem of soil continuing to release gas into the static box 1 during the sampling process and reducing the sampling accuracy.

[0046] See also Figure 8 The mating seal is composed of a strip arc seat 421 installed on the inner wall of the rectangular frame 10 and an arc-shaped rubber strip 422 installed on the arc surface of the strip arc seat 421. After the rotating blade 41 with an arc-shaped side wall rotates, the arc-shaped side wall on it is tightly pressed against the arc-shaped rubber strip 422 on the strip arc seat 421, further improving the sealing performance of the lower end of the rectangular frame 10.

[0047] See also Figure 1 , Figure 2 , Figure 6 and Figure 8 The lifting roller mechanism 5 includes a lifting frame 50, and supplementary plates 51 are installed on the tops of the four horizontal sections of the lifting frame 50. The lower end of the rectangular frame 10 is slidably connected between the four supplementary plates 51. The lifting frame 50 is provided with a groove 52 opposite to the waist-shaped groove 434. Supplementary ear seats are installed at the four corners of the lifting frame 50, and universal wheels 53 are installed at the lower ends of the supplementary ear seats. A locking group 54 for locking the static box 1 is provided on the supplementary plate 51.

[0048] See also Figure 6 , Figure 7 and Figure 8 The locking group 54 includes sliders 540 installed on the outer walls of the four horizontal sections on the lower side of the rectangular frame 10, a sliding groove slidably connected to the slider 540 is opened on the supplementary plate 51, and a stopper 541 inserted into the sliding groove is slidably connected to the supplementary plate 51.

[0049] The static box 1 is moved by the lifting roller mechanism 5, thereby improving the convenience of moving the static box 1. When the static box 1 moves to the location where sampling is required, the stopper 541 is manually pulled to remove the stopper 541 from under the slider 540 and no longer support the slider 540, and then the static box 1 moves downward to contact the ground at the sampling location.

[0050] See also Figure 8 A protective gasket 101 is installed at the bottom of the rectangular frame 10 , and the protective gasket 101 is used to protect the bottom of the rectangular frame 10 .

[0051] See also Figure 1 , Figure 3 , Figure 6 and Figure 7 The sampling mechanism 2 includes a sampling transmission box 20. A sampling flexible tube 21 is installed at the bottom of the sampling transmission box 20, which penetrates through the fixed plate 12 and then enters the static box 1. A sampling lifting group 22 is installed in the rectangular frame 10 to drive the sampling flexible tube 21 to move up and down away from one end of the sampling transmission box 20. An air pump (not shown in the figure) is arranged in the sampling transmission box 20, and an outer wall is provided with an inflation tube 23 arranged in sequence along its length direction. A valve (not shown in the figure) for controlling the on and off of the end of the inflation tube 23 is arranged in the sampling transmission box 20. The sampling transmission box 20 is a sampling transmission device in the existing gas sampling device.

[0052] Connect the gas sampling bags to each inflation tube 23, stop driving the stirring shaft 31 to rotate, and at this time, the vacuum pump, the sampling lifting group 22 and the valve cooperate to control the opening and closing of the corresponding ends of the inflation tube 23 in turn. Every time the sampling lifting group 22 moves downward a certain distance, the corresponding valve controls the corresponding end of the inflation tube 23 to open, and the valve at the end of the previous inflation tube 23 is closed.

[0053] The vacuum pump draws the gas in the static box 1 into the gas sampling bag through the sampling flexible tube 21, and the sampling lifting group 22 drives the end of the sampling flexible tube 21 to gradually move downward a certain distance in turn, thereby drawing the gas at different heights in the static box 1 into different gas sampling bags, further avoiding the problem of uneven dispersion of carbon dioxide, methane, etc. in the gas in the static box 1, thereby improving the accuracy and comprehensiveness of gas sampling.

[0054] See also Figure 1 , Figure 3 and Figure 7The sampling lifting group 22 includes a rectangular frame 10, and two vertical sections located directly below the sampling transmission box 20 are connected together with a lifting bar 220 that slides up and down. A fixing ring 221 is installed on the side wall of the lifting bar 220. The end of the sampling flexible tube 21 away from the sampling transmission box 20 is inserted into the fixing ring 221. A tensioning component for tensioning the sampling flexible tube 21 is installed between the sampling transmission box 20 and the lifting bar 220.

[0055] See also Figure 3 , Figure 4 and Figure 7 The tensioning assembly includes an elastic telescopic rod 230 and two fixed ear plates 231 installed at the bottom of the fixed plate 12. A tensioning roller 232 is installed at the lower end of the elastic telescopic rod 230. A guide wheel 233 is rotatably connected between the two fixed ear plates 231. The sampling flexible tube 21 is wound around the tensioning roller 232 and the guide wheel 233. A buckle 234 for limiting the sampling flexible tube 21 is installed at the lower end of the elastic telescopic rod 230. The guide wheel 233 is located between the elastic telescopic rod 230 and the fixed ring 221.

[0056] The rectangular frame 10 is provided with a driving source (such as an electric slider) for driving the lifting bar 220 to intermittently lift and lower. When the lifting bar 220 drives the lower end of the sampling flexible tube 21 to move downward through the fixing ring 221, the sampling flexible tube 21 squeezes the tensioning roller 232 to push the elastic telescopic rod 230 to contract. Under the elastic force of the elastic telescopic rod 230 itself, the tensioning roller 232 always contacts the sampling flexible tube 21. The tensioning roller 232, the elastic telescopic rod 230, and the guide wheel 233 cooperate to tension the sampling flexible tube 21 to prevent the sampling flexible tube 21 from being scattered. Figure 3 As shown, the sampling flexible tube 21 passes through the lower end of the tensioning roller 232 and the upper end of the guide wheel 233.

[0057] During operation, after the static box 1 is driven to move to the sampling site by the lifting roller mechanism 5, the static box 1 moves downward to contact the ground at the sampling site, so that the ground area is closed for a certain period of time to capture the gas released from the soil. The static box 1 is transparent all around, so that light can pass through without interfering with the ecological process of the soil inside the static box 1.

[0058] Before sampling of greenhouse gases is required, the lower end of the rectangular frame 10 is first sealed by the sealing mechanism 4 so that the gas released by the soil in the static box 1 is in a sealed space, and then the external drive motor connected to the stirring shaft 31 is started to drive the stirring shaft 31 to rotate. The stirring shaft 31 drives the stirring blades 32 to rotate to stir the gas in the static box 1 evenly, thereby avoiding uneven dispersion of carbon dioxide, methane, etc. in the gas in the static box 1 and affecting the accuracy of gas sampling.

[0059] Connect the gas sampling bags to each inflation tube 23, and stop driving the rotating shaft 40. At this time, the vacuum pump, the sampling lifting group 22 and the valve cooperate to control the opening and closing of the corresponding ends of the inflation tube 23 in turn. Every time the sampling lifting group 22 moves downward a certain distance, the corresponding valve controls the corresponding end of the inflation tube 23 to open, and the valve at the end of the previous inflation tube 23 is closed.

[0060] The vacuum pump draws the gas in the static box 1 into the gas sampling bag through the sampling flexible tube 21, and the sampling lifting group 22 drives the end of the sampling flexible tube 21 to gradually move downward a certain distance in turn, thereby drawing the gas at different heights in the static box 1 into different gas sampling bags, further improving the accuracy and comprehensiveness of gas sampling.

[0061] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential" and the like 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0062] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A greenhouse gas automatic sampling device, characterized in that: include: A static box (1) and a sampling mechanism (2) installed on the top of the static box (1); The static box (1) comprises a rectangular frame (10), a sealing mechanism (4) is installed in the rectangular frame at the bottom of the rectangular frame (10), a fixed plate (12) and a transparent plate (11) are installed in the rectangular frame at the top, and four rectangular frames distributed circumferentially of the rectangular frame (10) are also installed with transparent plates (11); The rectangular frame (10) is provided with a rotating stirring and mixing mechanism (3) connected between four vertical sections thereof, and a lifting roller mechanism (5) is provided at the bottom of the rectangular frame (10); The sealing mechanism (4) comprises a plurality of rotating shafts (40) rotatably connected and evenly arranged between two corresponding horizontal sections on the lower side of the rectangular frame (10), a rotating blade (41) being fixedly sleeved on the rotating shaft (40), a sealing assembly (42) being arranged between two adjacent rotating blades (41), and an opening and closing driving group (43) for driving the rotating shaft (40) to drive the rotating blades (41) to rotate to a horizontal state so as to close the bottom of the rectangular frame (10) being installed on the rectangular frame (10); The sampling mechanism (2) comprises a sampling transmission box (20), a sampling flexible tube (21) is installed at the bottom of the sampling transmission box (20) and penetrates through a fixed plate (12) and then enters the static box (1), a sampling lifting group (22) is installed in the rectangular frame (10) and drives the sampling flexible tube (21) to move up and down away from one end of the sampling transmission box (20), an air pump is arranged in the sampling transmission box (20), and an outer wall is provided with an inflation tube (23) arranged in sequence along its length direction, and a valve is provided in the sampling transmission box (20) to control the opening and closing of the end of the inflation tube (23).

2. The automatic greenhouse gas sampling device according to claim 1, characterized in that: The opening and closing driving group (43) comprises a mounting groove (430) provided on one of the horizontal sections perpendicular to the axis of the rotating shaft (40) on the lower side of the rectangular frame (10); after the plurality of rotating shafts (40) are inserted into the mounting groove (430), gears (431) are fixedly sleeved thereon; a moving bar (433) is slidably connected in the mounting groove (430); a rack (432) meshing with the plurality of gears (431) is installed on the moving bar (433); a waist-shaped groove (434) communicating with the mounting groove (430) is provided on the outer wall of the rectangular frame (10); and a push rod (435) penetrating the waist-shaped groove (434) is installed on the moving bar (433).

3. The automatic greenhouse gas sampling device according to claim 1, characterized in that: The sampling lifting group (22) comprises a rectangular frame (10) and two vertical sections located directly below the sampling transmission box (20), on which a lifting bar (220) is connected to slide up and down, a fixing ring (221) is installed on the side wall of the lifting bar (220), and an end of the sampling flexible tube (21) away from the sampling transmission box (20) is inserted into the fixing ring (221), and a tensioning component for tensioning the sampling flexible tube (21) is installed between the sampling transmission box (20) and the lifting bar (220).

4. The automatic greenhouse gas sampling device according to claim 2, characterized in that: The lifting roller mechanism (5) comprises a lifting frame (50), and supplementary plates (51) are installed on the tops of the four horizontal sections of the lifting frame (50). The lower end of the rectangular frame (10) is slidably connected between the four supplementary plates (51). The lifting frame (50) is provided with a groove (52) opposite to the waist-shaped groove (434). Supplementary ear seats are installed at the four corners of the lifting frame (50), and universal wheels (53) are installed at the lower ends of the supplementary ear seats. A locking group (54) for locking the static box (1) is provided on the supplementary plate (51).

5. The automatic greenhouse gas sampling device according to claim 1, characterized in that: The sealing assembly (42) comprises a rubber sealing sheet (420). Except for the two rotating blades (41) located on both sides, which are close to the inner side wall of the rectangular frame (10) and have an arc-shaped structure, the side walls of two adjacent rotating blades (41) that are close to each other and arranged along the width direction are all inclined. The rubber sealing sheet (420) is installed on the inclined side of the rotating blade (41), and a matching sealing member is installed in the rectangular frame (10) to cooperate with the rotating blade (41) with the arc-shaped side wall for sealing.

6. The automatic greenhouse gas sampling device according to claim 3, characterized in that: The tensioning assembly comprises an elastic telescopic rod (230) and two fixed ear plates (231) installed at the bottom of the fixed plate (12); a tensioning roller (232) is installed at the lower end of the elastic telescopic rod (230); a guide wheel (233) is rotatably connected between the two fixed ear plates (231); the sampling flexible tube (21) is wound around the tensioning roller (232) and the guide wheel (233); and a buckle (234) for limiting the sampling flexible tube (21) is installed at the lower end of the elastic telescopic rod (230).

7. The automatic greenhouse gas sampling device according to claim 1, characterized in that: The rotary stirring and mixing mechanism (3) comprises a fixed frame (30) connected between four vertical sections of the rectangular frame (10) and arranged symmetrically in an upper and lower manner, a stirring shaft (31) being rotatably connected to the upper and lower fixed frames (30), and a plurality of stirring blades (32) arranged evenly are installed on the side wall of the stirring shaft (31).

8. The automatic greenhouse gas sampling device according to claim 5, characterized in that: The matching seal is composed of a strip arc seat (421) installed on the inner wall of the rectangular frame (10) and an arc-shaped rubber strip (422) installed on the arc surface of the strip arc seat (421).

9. The automatic greenhouse gas sampling device according to claim 4, characterized in that: The locking group (54) comprises sliders (540) mounted on the outer walls of the four horizontal sections at the lower side of the rectangular frame (10); a slide groove slidably connected to the slider (540) is provided on the supplementary plate (51); and a stopper (541) inserted into the slide groove is slidably connected to the supplementary plate (51).

10. The automatic greenhouse gas sampling device according to claim 1, characterized in that: A protective gasket (101) is installed at the bottom of the rectangular frame (10).

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