Greenhouse gas emission flux collecting device

Abstract

The embodiment of the invention is suitable for the technical field of gas collection, and provides a greenhouse gas emission flux collection device which comprises a gas collection cylinder, and a vent hole is formed in an opening in the bottom end of the gas collection cylinder; the gas collecting cylinder is arranged on the upper ring seat in a sliding penetrating and sealing manner; the fixing plates are of an arc-shaped structure, and the fixing plates are distributed in a circumferential array mode with the central axis of the gas collecting cylinder as the center; the top of the sealing cover is integrally connected with an upper ring sleeve, and the upper ring sleeve fixedly sleeves the upper ring seat in a sealing manner; a sealing ring is integrally formed at the opening of the bottom of the sealing cover, the fixing plate is fixedly sleeved with the sealing ring in a sealing mode, a mounting cavity is formed in the outer wall of the fixing plate and matched with the sealing ring, and the sealing ring is fixed in the mounting cavity. According to the invention, a closed gas sample collection space can be provided, the operability of the device is improved, and the accuracy of collected data is ensured.

Description

Technical Field

[0001] The embodiments of the present application belong to the field of gas collection technology, and in particular to greenhouse gas collection in urban sewage pipe networks, and specifically to a greenhouse gas emission flux collection device. Background Art

[0002] Municipal sewage systems are not only a vital component of urban infrastructure but also a source of greenhouse gas emissions. The sewage in these pipes contains high concentrations of organic carbon and nitrogen compounds, providing abundant nutrients and a suitable growth environment for a variety of microorganisms. Within these microbial communities, methanogens and nitrifying and denitrifying bacteria are particularly active. Through their metabolic activities, they convert organic matter in sewage into greenhouse gases such as methane, carbon dioxide, and nitrogen oxides.

[0003] Therefore, in-depth research on the greenhouse gas emission mechanisms of urban sewage pipes and clarifying their emission fluxes and total amounts is of great scientific significance and practical value. This will not only help us better understand the role of urban sewage pipe systems in the global carbon and nitrogen cycle, but also provide a scientific basis for formulating effective emission reduction strategies.

[0004] At present, greenhouse gas emission flux refers to the emission per unit time per unit monitoring area. On the one hand, gas sample collection must be carried out on a specific sewage area. On the other hand, the gas sample collection space must be a closed space. This ensures that the greenhouse gas concentration in the gas samples collected at the same time interval increases with the extension of the collection time. Only in this way can the greenhouse gas emission flux be calculated.

[0005] In the related technology, such as the patent document with publication number CN118883185A, in order to solve the problem that the collection device cannot be effectively fixed in the sewage well due to significant differences in the diameters of different sewage wells, this technology provides a greenhouse gas emission flux collection device, which uses a first connecting member and a second connecting member to be hinged with a connecting rod, and the connecting rods are cross-arranged, so when the second connecting member moves, the connecting rod will drive the guard plate to open and close to adapt to sewage wells of different diameters and ensure that the device can be stably installed in various sewage wells; through analysis, it was found that in this technical solution, although the collection device can be fixed more stably in the sewage well, the solution cannot provide a closed gas sample collection space and has obvious limitations. Summary of the Invention

[0006] The purpose of the embodiment of the present invention is to provide a greenhouse gas emission flux collection device, aiming to solve the problems raised by the above-mentioned background technology. The collection device provided by the present invention can provide a closed gas sample collection space, improve the operability of the device, and ensure the accuracy of the collected data.

[0007] To achieve the above objectives, the present invention provides the following technical solutions.

[0008] A greenhouse gas emission flux collection device includes a gas collecting cylinder, wherein a vent is provided at an open bottom end of the gas collecting cylinder; the gas collecting cylinder slides through and is sealed on an upper ring seat; a temperature sensor and a gas sample collector are built into the inner cavity of the bottom end of the gas collecting cylinder; control circuits of the temperature sensor and the gas sample collector are integrated into a cable bundle, and the cable bundle is sealed and extended along the top end of the gas collecting cylinder; a gas sampling pipe is also sealed and extended through the top end of the gas collecting cylinder, and the gas sampling pipe is connected to the gas sample collector;

[0009] Also includes:

[0010] Multiple fixing plates, each of which is in an arc-shaped structure, are arranged in a circular array with the central axis of the gas collecting cylinder as the center;

[0011] A sealing cover, wherein the top of the sealing cover is integrally formed with an upper ring sleeve, and the upper ring sleeve fixes the sealing sleeve and is arranged on the upper ring seat; the bottom open part of the sealing cover is integrally formed with a sealing ring, and the sealing ring fixes the sealing sleeve and is arranged on a fixed plate, wherein the outer wall of the fixed plate is provided with an installation cavity, the installation cavity cooperates with the sealing ring, and the sealing ring is fixed in the installation cavity; the sealing ring located in the installation cavity is fixed by one or more fixing nails.

[0012] Furthermore, the sealing ring has an air cavity inside; the lower part of the fixed plate is provided with an air supply component, which is used to blow air into the air cavity, wherein an extrusion plate is provided on the outer side of the lower part of the fixed plate, and the extrusion plate corresponds to the groove part of the outer side wall of the lower part of the fixed plate.

[0013] Furthermore, the air supply assembly includes an air supply cylinder, multiple air supply cylinders are installed on a fixed plate, adjacent air supply cylinders are connected by a connecting pipe, and one of the connecting pipes is connected to an air supply pipe, the other end of the air supply pipe is connected to the air cavity; the piston block in the air supply cylinder is connected to the piston rod, the other end of the piston rod is connected to the extrusion plate, and the extrusion plate and the fixed plate are also connected by multiple connecting springs.

[0014] Furthermore, it also includes a supporting structure, which includes a support plate. A storage cavity for accommodating the support plate is opened in the fixed plate, and the outer end of the support plate is fixedly connected to the sealing ring through a connecting block.

[0015] Furthermore, it also includes an adjustment mechanism for causing the multiple fixed plates to move synchronously;

[0016] The adjustment mechanism includes an upper support, which is fixedly mounted on the upper ring seat;

[0017] A plurality of first hinged seats are fixedly provided on the outer side wall of the upper support; the adjustment mechanism further comprises a lower support, the lower support is located below the upper support, and the height of the lower support relative to the upper support is adjusted by a height adjustment module;

[0018] A plurality of second hinged seats are fixedly provided on the outer side wall of the lower support;

[0019] A third hinge seat is fixedly provided on the arc-shaped concave side of the fixing plate;

[0020] The adjustment mechanism also includes a first support rod and a second support rod, wherein one end of the first support rod is connected to the first hinge seat, and the other end of the first support rod is connected to the third hinge seat; and one end of the second support rod is connected to the second hinge seat, and the other end of the second support rod is connected to the third hinge seat.

[0021] Furthermore, the height adjustment module includes an internal threaded rotating cylinder and an external threaded sleeve, and the internal threaded rotating cylinder is sleeved on the external threaded sleeve by a threaded connection;

[0022] The lower support is coaxially fixedly mounted on the outer ring of the external threaded sleeve;

[0023] The internal thread rotating drum is coaxially penetrated and rotatably arranged inside the upper support.

[0024] Furthermore, a forward and reverse servo motor is installed on the upper ring seat, and a driving gear is installed on the output shaft of the forward and reverse servo motor through a coupling;

[0025] The outer ring of the top end of the internal thread drum is processed with a driven gear ring that meshes with the driving gear.

[0026] Compared with the prior art, the greenhouse gas emission flux collection device of the present invention has the following advantages:

[0027] First, the present invention utilizes an adjustment mechanism to push the fixed plate to move away from the gas collecting cylinder, thereby achieving synchronous outward movement of multiple fixed plates, so that the multiple fixed plates are tightly pressed against the inner wall of the sewage well, thereby achieving the fixing of the collection device of the present invention in the sewage well;

[0028] Second, when the collection device is lowered into the sewage well, due to the gap between the fixed plate and the inner wall of the sewage well, when the collection device is fixed in the sewage well, the extrusion plate of the present invention will be against the inner wall of the sewage well before the fixed plate. As the extrusion plate continues to move, the connecting spring is gradually compressed, and the piston rod pushes the piston block in the air supply cylinder to move, squeezing the air in the air supply cylinder, so that the gas is pressed into the air cavity through the connecting pipe and the air supply pipe, so that more gas is injected into the air cavity, so that the sealing ring remains in a more full state, thereby improving the sealing effect.

[0029] Third, the collection device of the present invention also provides a structure for supporting the sealing ring. The supporting structure supports the sealing ring between two adjacent fixed plates to avoid the problem that the sealing ring cannot fit tightly with the inner wall of the sewage well due to being suspended when the sealing ring is stretched; specifically, when the sealing ring between two adjacent fixed plates is stretched, the support plate will also be pulled out of the storage cavity, so that the support plate can provide support for the sealing ring, avoiding the sealing ring here from being suspended, and effectively ensuring the sealing effect.

[0030] To sum up, the present invention is based on the cooperation of the sealing cover, the sealing ring and the upper ring sleeve, so that the conical structure formed by the sealing cover, the sealing ring and the upper ring sleeve can match the spatial structure formed by the adjustment mechanism and the fixed plate, so that when the collection device of the present invention is fixed in the sewage well, the provided sealing ring forms a sealing effect between the collection device and the inner wall of the sewage well, which can provide a closed gas sample collection space, improve the operability of the device, and ensure the accuracy of the collected data. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention.

[0032] Figure 1 This is a front view of a greenhouse gas emission flux collection device according to the present invention;

[0033] Figure 2 for Figure 1 Schematic diagram of the state where the collection device is installed in the sewage well of the urban sewage pipeline;

[0034] Figure 3 This is a three-dimensional diagram of a greenhouse gas emission flux collection device according to the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of the collection device provided by the present invention after removing the sealing cover;

[0036] Figure 5 for Figure 4 A bottom view of the provided collection device;

[0037] Figure 6 for Figure 4 A top view of the provided collection device;

[0038] Figure 7 for Figure 4 A schematic diagram of the three-dimensional structure of the collection device provided;

[0039] Figure 8 This is a schematic structural diagram of the gas replenishment component in the collection device provided by the present invention;

[0040] Figure 9 This is a schematic diagram of the coordination between the gas collecting cylinder and the height adjustment module in the collection device provided by the present invention;

[0041] Figure 10 for Figure 9 A magnified schematic diagram of point A in the middle;

[0042] Figure 11 A schematic diagram of the coordination between the adjustment mechanism and the gas collecting cylinder in the collection device provided by the present invention;

[0043] Figure 12 A schematic structural diagram of a fixed block in the adjustment mechanism provided by the present invention;

[0044] Figure 13 for Figure 12 A schematic diagram of another perspective of the provided fixing block;

[0045] Figure 14 for Figure 13 Enlarged schematic diagram of point B in the middle.

[0046] The reference numerals are as follows: 1, sealing cover; 11, sealing ring; 111, air cavity; 12, upper ring sleeve;

[0047] 2. Adjustment mechanism; 21. Upper support; 211. Upper ring seat; 212. Internally threaded rotating cylinder; 213. First hinge seat; 214. Driven gear ring; 22. Lower support; 221. Externally threaded sleeve; 222. Second hinge seat; 23. First support rod; 24. Second support rod; 25. Forward and reverse servo motor; 251. Driving gear;

[0048] 3. Gas collecting cylinder; 31. Cable bundle; 32. Gas collection pipe; 33. Floating block; 34. Vent hole;

[0049] 4. Extruded plate;

[0050] 5. Fixing plate; 51. Air cylinder; 511. Piston rod; 512. Connecting spring; 513. Connecting pipe; 514. Air supply pipe; 52. Storage chamber; 53. Fixing pin; 54. Support plate; 541. Connecting block; 55. Mounting chamber; 56. Third hinge seat;

[0051] 6. Sewage well. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0053] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0054] Please refer to Figure 1 、 Figure 3-Figure 7 In one embodiment of the present invention, a greenhouse gas emission flux collection device is provided, comprising a gas collecting cylinder 3, wherein a vent hole 34 is provided at the bottom open end of the gas collecting cylinder 3, and the collected air enters the gas collecting cylinder 3 through the vent hole 34;

[0055] In the prior art, temperature sensors, gas sample collectors and other components are built into the inner cavity at the bottom end of the gas collecting cylinder 3. The control circuits of these components are integrated on the cable bundle 31, and the cable bundle 31 is sealed and passed through the top of the gas collecting cylinder 3. In addition, a gas sampling pipe 32 is also sealed and passed through the top of the gas collecting cylinder 3. The gas sampling pipe 32 is connected to the gas sample collector and is used to lead the air collected by the gas sample collector out of the gas sampling pipe 32 and send it to the gas analysis instrument.

[0056] In the embodiment of the present invention, in order to form a closed space in the sewage well 6 when the collection device is installed in the sewage well 6, the collection device of the present invention further includes a plurality of fixing plates 5, the fixing plates 5 having an arc-shaped structure, and the plurality of fixing plates 5 are distributed in a circular array with the central axis of the gas collecting cylinder 3 as the center;

[0057] like Figure 4 and Figure 7 As shown, the collecting device of the present invention further includes an adjusting mechanism 2 for making the multiple fixing plates 5 move synchronously;

[0058] The adjustment mechanism 2 provided by the embodiment of the present disclosure includes an upper support 21, which is fixedly mounted on an upper ring seat 211, wherein the gas collecting cylinder 3 slides through and is sealed on the upper ring seat 211, and a plurality of floating blocks 33 are fixedly arranged in a circumferential array on the outer wall of the bottom open end of the gas collecting cylinder 3. With the arrangement of the floating blocks 33, the bottom end of the gas collecting cylinder 3 can float on the surface of the sewage, so that the gas on the sewage surface can enter the gas collecting cylinder 3 through the vent 34; a plurality of first hinged seats 213 are fixedly arranged on the outer wall of the upper support 21; the adjustment mechanism 2 also includes a lower support 22, which is located below the upper support 21, and the height of the lower support 22 relative to the upper support 21 is adjusted by a height adjustment module;

[0059] like Figure 9As shown, the height adjustment module provided by the embodiment of the present invention includes an internal threaded rotating cylinder 212 and an external threaded sleeve 221. The internal threaded rotating cylinder 212 is sleeved on the external threaded sleeve 221 by a threaded connection, so that when the internal threaded rotating cylinder 212 rotates relative to the external threaded sleeve 221, the external threaded sleeve 221 can be moved up or down according to the rotation direction; wherein, the lower support 22 is coaxially fixedly installed on the outer ring of the external threaded sleeve 221; the internal threaded rotating cylinder 212 is coaxially penetrated and rotatably arranged inside the upper support 21. Specifically, the internal threaded rotating cylinder 212 can rotate relative to the upper support 21;

[0060] Please continue to refer to Figure 4 、 Figure 7 and Figure 11 In the embodiment of the present invention, a plurality of second hinge seats 222 are fixedly provided on the outer side wall of the lower support 22; a third hinge seat 56 is fixedly provided on the arc-shaped concave side of the fixing plate 5;

[0061] The adjustment mechanism 2 provided in the embodiment of the present disclosure further includes a first support rod 23 and a second support rod 24, wherein one end of the first support rod 23 is connected to the first hinge seat 213, and the other end of the first support rod 23 is connected to the third hinge seat 56; one end of the second support rod 24 is connected to the second hinge seat 222, and the other end of the second support rod 24 is connected to the third hinge seat 56. When the height adjustment module is used to move the lower support 22 downward relative to the upper support 21, the second support rod 24 pushes the fixed plate 5 to move away from the direction of the gas collecting cylinder 3, further realizing the synchronous outward movement of multiple fixed plates 5, so that the multiple fixed plates 5 are tightly against the inner wall of the sewage well 6, as shown in FIG. Figure 2 As shown, the collection device of the present invention is fixed in the sewage well 6; on the contrary, when the height adjustment module is used to move the lower support 22 upward relative to the upper support 21, multiple fixing plates 5 can be synchronously cohesive, and the collection device can be taken out of the sewage well 6.

[0062] During specific implementation, a plurality of hooks may be provided on the upper ring seat 211 for lowering the collecting device of the present invention into the sewage well 6 or taking it out from the sewage well 6 via a rope.

[0063] Further, such as Figure 9 and Figure 10As shown, a forward and reverse servo motor 25 is installed on the upper ring seat 211 of the present invention, and a driving gear 251 is installed on the output shaft of the forward and reverse servo motor 25 through a coupling; accordingly, the outer ring of the top end of the internal threaded rotating cylinder 212 is processed with a driven gear ring 214 that meshes with the driving gear 251. During specific implementation, the start of the forward and reverse servo motor 25 is controlled to drive the internal threaded rotating cylinder 212 to rotate relative to the external threaded sleeve 221, thereby adjusting the relative position between the upper support 21 and the lower support 22; it can be understood that the cable harness 31 of the present invention is also integrated with a control cable for controlling the start and stop of the forward and reverse servo motor 25. The control cable is externally connected to a controller, and the forward and reverse servo motor 25 is driven to start and stop by operating the controller.

[0064] It is understandable that when the collection device is lowered into the sewage well 6, there is a gap between the fixing plate 5 and the inner wall of the sewage well 6, and the gap between two adjacent fixing plates 5 cannot ensure that the area below the collection device is in a closed space. In order to solve this problem, Figure 1 、 Figure 3 and Figure 11 As shown, the collection device provided by the embodiment of the present invention further includes a sealing cover 1, which is a hollow truncated cone structure, so that it matches the spatial structure formed by the adjustment mechanism 2 and the fixing plate 5 of the present invention;

[0065] Among them, such as Figure 13 As shown, the top of the sealing cover 1 is integrally formed and connected with an upper ring sleeve 12, which fixes the sealing sleeve on the upper ring seat 211; the bottom open part of the sealing cover 1 is integrally formed with a sealing ring 11, which fixes the sealing sleeve on the fixed plate 5;

[0066] Preferably, Figure 12-14 As shown, the outer wall of the fixing plate 5 is provided with a mounting cavity 55, the mounting cavity 55 cooperates with the sealing ring 11, and the sealing ring 11 is fixed in the mounting cavity 55; further, as shown Figure 6 As shown, the sealing ring 11 located in the installation cavity 55 is fixed by one or more fixing pins 53, and the fixing points should be set in a concentrated manner to avoid excessive influence on the stretching of the sealing ring 11; in this way, when the multiple fixing plates 5 expand outward synchronously, the sealing ring 11 located in the installation cavity 55 is in a fixed state, and the sealing ring 11 between the two adjacent fixing plates 5 can be stretched.

[0067] Therefore, the present invention is based on the cooperation of the sealing cover 1, the sealing ring 11 and the upper ring sleeve 12, so that the truncated cone structure formed by the sealing cover 1, the sealing ring 11 and the upper ring sleeve 12 can match the spatial structure formed by the adjustment mechanism 2 and the fixed plate 5, so that when the collection device of the present invention is fixed in the sewage well 6, the provided sealing ring 11 forms a sealing effect between the collection device and the inner wall of the sewage well 6, so that a sealed space can be formed in the sewage well 6 below the collection device.

[0068] Please continue reading Figure 7 、 Figure 8 、 Figure 11-14 In the embodiment of the present invention, the sealing ring 11 has an air cavity 111 inside; the lower part of the fixed plate 5 is provided with an air-inflating component, which is used to inflate air into the air cavity 111, wherein an extrusion plate 4 is provided on the outer side of the lower part of the fixed plate 5, and the extrusion plate 4 corresponds to the groove portion of the outer wall of the lower part of the fixed plate 5. When the adjusting mechanism 2 pushes the fixed plate 5 to approach the inner wall of the sewage well 6, the extrusion plate 4 is pressed against the inner wall of the sewage well 6 before the fixed plate 5. Therefore, as the adjusting mechanism 2 continues to push the fixed plate 5 to expand outward, the extrusion plate 4 will move closer to the fixed plate 5. The approaching movement in this process will cause the air-inflating component to inflate air into the air cavity 111. When the extrusion plate 4 is completely sunk into the groove on the outer wall side of the lower part of the fixed plate 5, the air cavity 111 is inflated, so that the sealing ring 11 is filled, which effectively ensures the sealing effect between the fixed plate 5 and the inner wall of the sewage well 6.

[0069] Furthermore, in one embodiment of the air supply assembly provided in the embodiment of the present disclosure, the air supply assembly includes an air supply cylinder 51, and multiple air supply cylinders 51 are installed on the fixing plate 5. The number of air supply cylinders 51 is not limited and can be reasonably arranged according to needs;

[0070] like Figure 8 As shown, two adjacent air-filling cylinders 51 are connected via a connecting pipe 513, and an air supply pipe 514 is connected to one of the connecting pipes 513, and the other end of the air supply pipe 514 is connected to the air cavity 111; the piston block in the air-filling cylinder 51 is connected to the piston rod 511, and the other end of the piston rod 511 is connected to the extrusion plate 4, and the extrusion plate 4 and the fixed plate 5 are also connected by multiple connecting springs 512; in the figure, the connecting spring 512 is sleeved on the piston rod 511, one end of the connecting spring 512 is connected to the extrusion plate 4, and the other end of the connecting spring 512 is connected to the fixed plate 5.

[0071] In the above concept of the present invention, when the collection device is fixed in the sewage well 6, the extrusion plate 4 will be against the inner wall of the sewage well 6 before the fixing plate 5. As the extrusion plate 4 continues to move, the connecting spring 512 is gradually compressed, and the piston rod 511 pushes the piston block in the air supply cylinder 51 to move, squeezing the air in the air supply cylinder 51, so that the gas is pressed into the air cavity 111 through the connecting pipe 513 and the air supply pipe 514, so that more gas is injected into the air cavity 111, so that the sealing ring 11 remains in a more full state, thereby improving the sealing effect.

[0072] The collection device of this embodiment further provides a structure for supporting the sealing ring 11. Specifically, the support structure supports the sealing ring 11 between two adjacent fixing plates 5 to prevent the sealing ring 11 from being unable to closely adhere to the inner wall of the sewage well 6 due to being suspended when stretched.

[0073] In some embodiments, as Figure 11-14 As shown, the support structure provided by the present invention includes a support plate 54, and a receiving cavity 52 for accommodating the support plate 54 is opened in the fixed plate 5, that is, the support plate 54 can extend from or retract into the receiving cavity 52, and the outer end of the support plate 54 is fixedly connected to the sealing ring 11 by a connecting block 541. When the sealing ring 11 between two adjacent fixed plates 5 is stretched, the support plate 54 will also be pulled out from the receiving cavity 52, so that the support plate 54 can provide support for the sealing ring 11, thereby preventing the sealing ring 11 from being suspended here, and effectively ensuring the sealing effect.

[0074] After securing the collection device, the present invention proceeds to collect greenhouse gas emission fluxes. First, the gas sample collector is activated to begin collecting gas samples from the sewage well. Simultaneously, a temperature sensor begins monitoring the well's temperature and transmits this data in real time to a gas analyzer. Based on the received temperature data, the gas analyzer adjusts the operating parameters of the gas sample collector to ensure representative gas samples.

[0075] After collection, the collected gas is analyzed using a gas analyzer compatible with existing technologies, primarily to analyze and determine the concentrations of greenhouse gases (such as CO2, CH4, and N2O) in the gas sample. Greenhouse gas concentrations are measured using an Agilent gas chromatograph. External calibration is performed using standard gases before and during measurement. The gas analysis process of the present invention is not considered an innovative feature of this application and is not described in detail here.

[0076] The above solutions are only examples of preferred embodiments, but are not limited thereto. When implementing the present invention, appropriate replacements and / or modifications can be made according to user needs.

[0077] The number of devices and processing scales described herein are intended to simplify the description of the present invention. Applications, modifications, and variations of the present invention will be readily apparent to those skilled in the art.

[0078] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and exemplary embodiments. They can be applied to a variety of fields suitable for the present invention. Further modifications will be readily apparent to those skilled in the art. Therefore, the present invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims

1. A greenhouse gas emission flux collection device, comprising a gas collecting cylinder (3), wherein a vent hole (34) is provided at an open bottom end of the gas collecting cylinder (3); the gas collecting cylinder (3) is slidably penetrated and sealed on an upper ring seat (211); It is characterized by: Also includes: A plurality of fixing plates (5), the fixing plates (5) being in an arc-shaped structure, and the plurality of fixing plates (5) being distributed in a circular array with the central axis of the gas collecting cylinder (3) as the center; A sealing cover (1), wherein the top of the sealing cover (1) is integrally formed and connected with an upper ring sleeve (12), and the upper ring sleeve (12) fixes the sealing sleeve and is arranged on the upper ring seat (211); a sealing ring (11) is integrally formed at the bottom open portion of the sealing cover (1), and the sealing ring (11) fixes the sealing sleeve and is arranged on the fixed plate (5), wherein the outer wall of the fixed plate (5) is provided with a mounting cavity (55), the mounting cavity (55) cooperates with the sealing ring (11), and the sealing ring (11) is fixed in the mounting cavity (55); the sealing ring (11) located in the mounting cavity (55) is fixed by one or more fixing pins (53).

2. A greenhouse gas emission flux collection device according to claim 1, characterized in that: The sealing ring (11) has an air cavity (111) inside; an air supply assembly is provided at the lower portion of the fixed plate (5), and the air supply assembly is used to blow air into the air cavity (111), wherein an extrusion plate (4) is provided on the outer side of the lower portion of the fixed plate (5), and the extrusion plate (4) corresponds to the groove portion of the outer side wall of the lower portion of the fixed plate (5).

3. A greenhouse gas emission flux collection device according to claim 2, characterized in that: The air supply assembly includes an air supply cylinder (51), wherein a plurality of air supply cylinders (51) are mounted on a fixed plate (5), and adjacent air supply cylinders (51) are connected via a connecting pipe (513), and an air supply pipe (514) is connected to one of the connecting pipes (513), and the other end of the air supply pipe (514) is connected to the air cavity (111); a piston block in the air supply cylinder (51) is connected to a piston rod (511), and the other end of the piston rod (511) is connected to an extrusion plate (4), and the extrusion plate (4) and the fixed plate (5) are further connected via a plurality of connecting springs (512).

4. A greenhouse gas emission flux collection device according to claim 3, characterized in that: The supporting structure further comprises a support plate (54). A receiving cavity (52) for accommodating the support plate (54) is provided in the fixed plate (5). The outer end of the support plate (54) is fixedly connected to the sealing ring (11) via a connecting block (541).

5. A greenhouse gas emission flux collection device according to any one of claims 2 to 4, characterized in that: Also included is an adjustment mechanism (2) for causing the plurality of fixing plates (5) to move synchronously; The adjustment mechanism (2) comprises an upper support (21), and the upper support (21) is fixedly mounted on the upper ring seat (211); A plurality of first hinged seats (213) are fixedly provided on the outer side wall of the upper support (21); the adjustment mechanism (2) further comprises a lower support (22), the lower support (22) being located below the upper support (21), and the height of the lower support (22) relative to the upper support (21) being adjusted by a height adjustment module; A plurality of second hinged seats (222) are fixedly provided on the outer side wall of the lower support (22); A third hinge seat (56) is fixedly provided on the arc-shaped concave side of the fixing plate (5); The adjustment mechanism (2) further comprises a first support rod (23) and a second support rod (24), wherein one end of the first support rod (23) is connected to the first hinge seat (213), and the other end of the first support rod (23) is connected to the third hinge seat (56); and one end of the second support rod (24) is connected to the second hinge seat (222), and the other end of the second support rod (24) is connected to the third hinge seat (56).

6. A greenhouse gas emission flux collection device according to claim 5, characterized in that: The height adjustment module comprises an internally threaded rotating cylinder (212) and an externally threaded sleeve (221), wherein the internally threaded rotating cylinder (212) is sleeved on the externally threaded sleeve (221) by means of a threaded connection; The lower support (22) is coaxially fixedly mounted on the outer ring of the externally threaded sleeve (221); The internal thread rotating cylinder (212) is coaxially penetrated and rotatably arranged inside the upper support (21).

7. A greenhouse gas emission flux collection device according to claim 6, characterized in that: A forward and reverse servo motor (25) is mounted on the upper ring seat (211), and a driving gear (251) is mounted on the output shaft of the forward and reverse servo motor (25) via a coupling; The outer ring at the top end of the internally threaded rotating cylinder (212) is machined with a driven gear ring (214) that meshes with the driving gear (251).

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