Gas detection device for greenhouse

Abstract

The invention discloses a gas detection device for a greenhouse, and belongs to the technical field of gas detection sample, the gas detection device comprises an outer support ring, a plurality of floating body mechanisms are arranged in the outer support ring along the axis in a surrounding manner, the inner side of each floating body mechanism is connected with an inner support ring, the top of each inner support ring is connected with a static box, and the top of each static box is provided with a sample box; a sampling machine main body is mounted in the static box. According to the device, through the designed multiple air inlets, when the static box floats on the top of the water body, the gas environment in the static box can be reset by controlling opening of the air inlets, it is convenient to wait for regeneration of the greenhouse gas in the water body and sample the greenhouse gas in the water body after the gas environment of the static box is reset, and the accuracy of interval sampling of the greenhouse gas in the water body is improved; and the sampling precision is prevented from being influenced by non-emission of gas in a traditional static box.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas sampling, and particularly relates to a gas detection device for greenhouses. Background Art

[0002] The greenhouse gases in water mainly refer to carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O) emitted from water bodies such as lakes, rivers, wetlands, reservoirs, and oceans. These gases are mainly released into the atmosphere through biogeochemical processes (such as organic matter decomposition and microbial activities) and physical processes (such as water body disturbance and temperature change) in the water body.

[0003] The Chinese invention patent with the authorization announcement number CN105738161B discloses an automatic sampling static chamber for greenhouse gases on the water surface, which consists of four parts: a static chamber, an automatic sampling device, a power supply system, and a control system. A floating body is fixed outside the static chamber, a fan is installed on the inner side of the chamber, and the top is provided with an opening and connected with a needle-shaped gas sampling port; the main part of the automatic sampling device is of a disc-shaped structure and can rotate freely. Vacuum gas sampling bags can be placed around the disc, and the center of the bag mouth is aligned with the horizontal needle-shaped gas sample outlet and can reciprocate in the horizontal sliding groove; the power supply system consists of a solar panel and a storage battery. The solar panel is fixed outside the static chamber, and two storage batteries are fixed inside the static chamber; the control system controls the automatic sampling device and stores environmental information. The temperature probe and the barometric recorder are connected to the control system. The present invention can be used for the automatic, continuous, and long-term collection of greenhouse gases on the open water surface, and can collect environmental information synchronously, which can meet the needs of sampling greenhouse gases on different water surfaces. However, in actual use, the gas on the water surface will automatically enrich in the static chamber. When the static chamber changes the sampling point along with the water surface flow, the static chamber enriched with greenhouse gases cannot well reflect the value of the greenhouse gases on the water surface after transfer, and there is room for improvement. Summary of the Invention

[0004] The purpose of the present invention is to propose a gas detection device for greenhouses to solve the problem that when the static chamber changes the sampling point along with the water surface flow, the static chamber enriched with greenhouse gases cannot well reflect the value of the greenhouse gases on the water surface after transfer.

[0005] To achieve the above purpose, the present invention adopts the following technical scheme: A gas detection device for greenhouses includes an outer support ring. A plurality of floating body mechanisms are arranged around the axis inside the outer support ring, and an inner support ring is connected to the inner side of the floating body mechanisms. The top of the inner support ring is connected with a static chamber. A sample box is installed on the top of the static chamber. A sampling machine main body is installed in the static chamber, and the greenhouse gas in the sample box is extracted into the sample box through the sampling machine main body; The static box is provided with a plurality of air inlets on the outer peripheral side, and an openable and closable ventilation component is provided in the air inlet, a driving mechanism is installed on one side of the ventilation component, and the driving mechanism is connected to the static box, the opening and closing of the ventilation component in the air inlet is controlled by the driving mechanism, and a control mechanism is connected to one side of the driving mechanism by transmission, a rotating inflation head is connected in a liftable manner in the sample box, the control mechanism extends into the sample box and controls the lifting and lowering of the rotating inflation head, and the lifting and lowering of the rotating inflation head is controlled by the opening and closing of the air inlet to control the concentration of the sampled gas in the static box.

[0006] As a further description of the above technical solution: The floating body mechanism includes a float bag, an energy absorbing ring block is provided on the inner side of the float bag, the inner side of the energy absorbing ring block is connected to the outer side of the inner support ring through a universal joint, the float bag is connected with fixed blocks on both sides corresponding to the energy absorbing ring block and the outer support ring, one side of the fixed block is connected to a hinge block, the hinge block is rotatably connected to a hinge seat outside the hinge block, and the hinge seat corresponding to one side of the energy absorbing ring block is connected to one side of the energy absorbing ring block, and the hinge seat corresponding to one side of the outer support ring is connected to a guide rod, the guide rod is slidably connected to a guide hole opened in the side wall of the outer support ring, a first spring is provided on the outer sleeve of the guide rod, two ends of the first spring are respectively connected to the end of the guide rod and the corresponding position on one side of the outer support ring, and a rotating pair buffering energy absorption is formed through the hinge seats and hinge blocks on both sides of the float bag.

[0007] As a further description of the above technical solution: A first fixed plate and a second fixed plate are connected to both sides of multiple energy absorbing ring blocks, and a hoop is connected to one side of the first fixed plate, and a plurality of elastic blocks are arranged around the inner cavity of the hoop along the axis, a pressure block is slidably connected in the hoop, and one side of the pressure block is connected to one side of the second fixed plate through a rod body, and the elastic block is pressed by the movement of the rod body to absorb the shaking of the energy absorbing ring blocks on both sides.

[0008] As a further description of the above technical solution: The diameter of the hoop is smaller than the diameter of the inner wall of the hoop, and the hoop is limited in the hoop by the elastic block. The second fixing plate squeezes the elastic block to absorb energy and buffer through the movement of the rod body and the pressing block in the hoop.

[0009] As a further description of the above technical solution: The ventilation assembly includes a plurality of gate plates arranged around the air inlet, a first rotating block is connected to the bottom of one side of the gate plate, a second rotating block is rotatably connected to the bottom of the first rotating block, a driving ring is connected between the plurality of second rotating blocks, and the driving ring is transmission-connected to one side of the driving mechanism, and the driving ring is driven by the driving mechanism to rotate and pull the gate plate to move in the air inlet.

[0010] As a further description of the above technical solution: One side of the gate plate is connected with a guide rod, a guide sleeve is sleeved outside the guide rod, a receiving groove for the gate plate to slide into is formed inside the air inlet, the guide rod extends into a stroke groove formed on one side corresponding to the bottom inside the receiving groove, the guide sleeve is connected to the stroke groove, a second spring is sleeved outside the guide rod, and two ends of the second spring are respectively connected to corresponding positions on one side of the guide sleeve and the first rotating block.

[0011] As a further description of the above technical solution: The driving mechanism includes a connecting rod rotatably connected to the bottom of the driving ring, the other end of the connecting rod is rotatably connected with a pushing block, one side of the pushing block is connected with an electric push rod, and the electric push rod is connected to one side inside the static box cavity.

[0012] As a further description of the above technical solution: The control mechanism includes a fixed ring and a rotating ring, the outside of the rotating ring is connected to the inside of the driving ring through a connecting plate, the fixed ring is connected to the bottom inside the static box cavity, a plurality of sliding holes are formed around the top of the fixed ring, a lifting rod is slidably connected inside the sliding holes, the bottom end of the lifting rod is in contact with a wedge block arranged at a corresponding position on the top of the rotating ring, the wedge block is driven to squeeze the lifting rod by the rotation of the driving ring, the top end of the lifting rod is connected with a connecting rod, a third spring is sleeved outside the lifting rod, two ends of the third spring are respectively connected to corresponding positions on one side of the fixed ring and the connecting rod, the other end of the connecting rod is connected with a top rod at the top, and the top rod passes through the static box and the sample box and is connected to the bottom side of the rotary inflator head.

[0013] As a further description of the above technical solution: A plurality of vacuum gas storage bags are arranged equidistantly around the axis inside the sample box cavity, and the gas injection ports of the vacuum gas storage bags are located on the radial side of the rotation stroke of the rotary inflator head.

[0014] As a further description of the above technical solution: The cross-sectional shape of the wedge block is triangular, and the inclined surface at the top of the wedge block is attached to the bottom of the lifting rod.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows: 1. In the present invention, through the designed multiple air inlets, when the static box floats on the top of the water body, the gas environment inside the static box can be reset by controlling the opening of the air inlets, which is convenient for waiting for the greenhouse gas in the water to be generated again after the gas environment in the static box is reset and sampling is carried out, improving the accuracy of interval sampling of the water body greenhouse gas and avoiding the influence of the non-dissipation of the gas in the traditional static box on the sampling accuracy; 2. In the present invention, through the designed floating body mechanism, when the floating bladder floats on the water surface and the water body fluctuates, the floating bladder can absorb part of the water body fluctuations. At the same time, the floating bladder can rotate around the axis of the hinge seat through the hinge blocks on both sides and offset to consume energy. When the shaking increases, the floating bladder can pull one side of the guide rod to slide in the guiding hole of the outer support ring. The movement of the guide rod can squeeze the external first spring, and the first spring can absorb the water body shaking with its own elastic force, improving the floating stability of the internal inner support ring and the static box, and avoiding the separation of the static box from the water surface due to the water body shaking, which affects the enrichment effect of greenhouse gases. 3. In the present invention, through the designed ventilation component, the electric push rod can work to extend and drive the push block to move. The movement of the push block can drive the driving ring to rotate through the connecting rod. The rotation of the driving ring can drive the second rotating block and the first rotating block to move. The movement of the first rotating block can drive the gate plate to move in the air inlet, so that the air inlet can be opened or closed as needed. By controlling the opening and closing of the air inlet, the gas concentration in the static box can be adjusted when treating greenhouse gases on the water surface, which is convenient for subsequent sampling treatment by the sampling machine main body and is beneficial to improving the sampling accuracy by controlling the gas environment in the static box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall structural schematic diagram of a gas detection device for a greenhouse proposed by the present invention; Figure 2 proposed by the present invention Figure 1 is the enlarged structural schematic diagram of part A in Figure 3 is the split structural schematic diagram of a gas detection device for a greenhouse proposed by the present invention; Figure 4 is the partial split structural schematic diagram of the floating body mechanism of a gas detection device for a greenhouse proposed by the present invention; Figure 5 is the side structural schematic diagram of a gas detection device for a greenhouse proposed by the present invention; Figure 6 is the sleeve hoop assembly structural schematic diagram of a gas detection device for a greenhouse proposed by the present invention; Figure 7 is the split structural schematic diagram of the ventilation component of a gas detection device for a greenhouse proposed by the present invention; Figure 8 is the assembly structural schematic diagram of the ventilation component of a gas detection device for a greenhouse proposed by the present invention; Figure 9 is the bottom view structural schematic diagram of the static box of a gas detection device for a greenhouse proposed by the present invention; Figure 10 proposed by the present invention Figure 9 is the enlarged structural schematic diagram of part B in

[0017] Legend: 1. Outer support ring; 2. Inner support ring; 3. Floating body mechanism; 301. Floating bag; 302. Guide rod; 303. First spring; 304. Articulated seat; 305. Articulated block; 306. Fixed block; 307. Universal joint; 308. First fixed plate; 309. Second fixed plate; 310. Energy absorbing ring block; 311. Hoop; 312. Elastic block; 313. Press block; 4. Static box; 5. Sampler body; 6. Ventilation assembly; 601. Gate; 602. First rotating block ; 603, second rotating block; 604, driving ring; 605, guide rod; 606, second spring; 607, guide sleeve; 7, driving mechanism; 701, electric push rod; 702, push block; 703, connecting rod; 8, control mechanism; 801, fixing ring; 802, connecting rod; 803, push rod; 804, lifting rod; 805, rotating ring; 806, wedge block; 807, connecting plate; 9, vacuum storage bag; 10, rotating inflation head; 11, bottom plate; 12, sample box. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figures 1 - 10 The present invention provides a technical solution: a greenhouse gas detection device, comprising an outer support ring 1, a plurality of floating body mechanisms 3 are arranged around the inner side of the outer support ring 1 along the axis, and an inner support ring 2 is connected to the inner side of the floating body mechanism 3, a static box 4 is connected to the top of the inner support ring 2, a sample box 12 is installed on the top of the static box 4, and a sampling machine body 5 is installed in the static box 4, and greenhouse gases in the sample box 12 are extracted into the sample box 12 through the sampling machine body 5; A plurality of air inlets are provided on the outer peripheral side of the static box 4, and a ventilation component 6 that can be opened and closed is provided in the air inlet. A driving mechanism 7 is installed on one side of the ventilation component 6, and the driving mechanism 7 is connected to the static box 4. The opening and closing of the ventilation component 6 in the air inlet is controlled by the driving mechanism 7, and a control mechanism 8 is transmission-connected to one side of the driving mechanism 7. A rotating inflation head 10 is connected to the sample box 12 in a liftable manner. The control mechanism 8 extends into the sample box 12 and controls the lifting and lowering of the rotating inflation head 10. The lifting and lowering of the rotating inflation head 10 is controlled by the opening and closing of the air inlet to control the concentration of the sampled gas in the static box 4.

[0020] Specifically: through the design of multiple air inlets, when the static box 4 floats on the top of the water body, the gas environment in the static box 4 can be reset by controlling the opening of the air inlet, so that it is convenient to wait for the greenhouse gas in the water body to be regenerated and sampled after the gas environment of the static box 4 is reset, thereby improving the accuracy of interval sampling of greenhouse gases in the water body and avoiding the influence of sampling accuracy on the non-emission of gas in the traditional static box 4.

[0021] See also Figures 1 - 6 The floating body mechanism 3 includes a floating bladder 301, an energy absorbing ring block 310 is arranged inside the floating bladder 301, and the inner side of the energy absorbing ring block 310 is connected to the outer side of the inner support ring 2 through a universal joint 307, and the floating bladder 301 is connected to fixed blocks 306 on both sides corresponding to the energy absorbing ring block 310 and the outer support ring 1, and one side of the fixed block 306 is connected to a hinge block 305, and the hinge block 305 is rotatably connected to a hinge seat 304 outside, and the hinge seat 304 on the side corresponding to the energy absorbing ring block 310 is connected to A guide rod 302 is connected to one side of the energy absorbing ring block 310 and the hinge seat 304 corresponding to one side of the outer support ring 1. The guide rod 302 is slidably connected to the guide hole provided in the side wall of the outer support ring 1. A first spring 303 is provided on the outer sleeve of the guide rod 302. The two ends of the first spring 303 are respectively connected to the end of the guide rod 302 and the corresponding position on the outer side of the outer support ring 1. The hinge seats 304 and the hinge blocks 305 on both sides of the floating bag 301 form a rotating pair buffering energy absorption; Both sides of the multiple energy absorbing ring blocks 310 are connected to the first fixing plate 308 and the second fixing plate 309, and one side of the first fixing plate 308 is connected to the hoop 311, and the inner cavity of the hoop 311 is surrounded by multiple elastic blocks 312 along the axis, and a pressure block 313 is slidably connected in the hoop 311, and one side of the pressure block 313 is connected to one side of the second fixing plate 309 through a rod body, and the elastic block 312 is pressed by the movement of the rod body to absorb the shaking of the energy absorbing ring blocks 310 on both sides; The diameter of the hoop 311 is smaller than the diameter of the inner wall of the hoop 311, and the hoop 311 is limited in the hoop 311 by the elastic block 312. The second fixing plate 309 squeezes the elastic block 312 to absorb energy and buffer through the movement of the rod body and the pressing block 313 in the hoop 311; Specifically: through the designed floating mechanism 3, when the float 301 floats on the surface of the water body and the water body fluctuates, the float 301 can absorb part of the water body fluctuations. At the same time, the float 301 can rotate around the axis of the hinge seat 304 through the hinge blocks 305 on both sides to offset energy consumption. When the shaking increases, the float 301 can pull the guide rod 302 on one side to slide in the guide hole of the outer support ring 1. The movement of the guide rod 302 can squeeze the external first spring 303. The first spring 303 can use its own elastic force to absorb the shaking of the water body, thereby improving the floating stability of the internal support ring 2 and the static box 4, and avoiding the static box 4 from being separated from the water surface due to the shaking of the water body, which affects the enrichment effect of greenhouse gases.

[0022] Furthermore, through the designed energy absorbing ring block 310, multiple energy absorbing ring blocks 310 can be independently connected to the floating bag 301, and when the floating bag 301 on one side fluctuates, the energy absorbing ring block 310 can pull the pressing block 313 to slide in the sleeve 311, and the rod body on one side of the pressing block 313 can absorb the shaking by squeezing the elastic block 312, thereby avoiding vibration interference between multiple energy absorbing ring blocks 310, realizing the separation of energy consumption for water fluctuations in different directions, and being conducive to improving the staying stability of the static box 4 in a complex water flow environment; The universal joint 307 disposed between the energy absorbing ring block 310 and the inner support ring 2 can further reduce the vibration transmission from the energy absorbing ring block 310 to the inner support ring 2; See also Figures 7 - 10 The ventilation assembly 6 includes a plurality of gate plates 601 arranged around the air inlet, a first rotating block 602 is connected to the bottom of one side of the gate plate 601, a second rotating block 603 is rotatably connected to the bottom of the first rotating block 602, and a driving ring 604 is connected between the plurality of second rotating blocks 603, and the driving ring 604 is transmission-connected to one side of the driving mechanism 7, and the driving ring 604 is driven by the driving mechanism 7 to rotate and pull the gate plate 601 to move in the air inlet.

[0023] A guide rod 605 is connected to one side of the gate plate 601, and a guide sleeve 607 is provided on the outer sleeve of the guide rod 605. A receiving groove for the gate plate 601 to slide into is provided on the inner side of the air inlet. The guide rod 605 extends to the travel groove provided on the inner bottom of the receiving groove corresponding to the one side of the guide rod 605. The guide sleeve 607 is connected to the travel groove. A second spring 606 is provided on the outer sleeve of the guide rod 605. The two ends of the second spring 606 are respectively connected to the corresponding positions of the guide sleeve 607 and one side of the first rotating block 602. The driving mechanism 7 includes a connecting rod 703 rotatably connected to the bottom of the driving ring 604 , and the other end of the connecting rod 703 is rotatably connected to a push block 702 , one side of the push block 702 is connected to an electric push rod 701 , and the electric push rod 701 is connected to one side of the inner cavity of the static box 4 .

[0024] Specifically: through the designed ventilation component 6, the push block 702 can be driven to move by the working extension of the electric push rod 701, and the movement of the push block 702 can drive the driving ring 604 to rotate through the connecting rod 703, and the rotation of the driving ring 604 can drive the second rotating block 603 and the first rotating block 602 to move, and the movement of the first rotating block 602 can drive the gate plate 601 to move in the air inlet, so that the air inlet can be opened or closed as needed. By controlling the opening and closing of the air inlet, the gas concentration in the static box 4 can be adjusted when the greenhouse gas treatment on the water surface is carried out, which is convenient for the subsequent sampling treatment through the sampling machine body 5, which is conducive to the control of the gas environment in the static box 4 and improves the sampling accuracy; Meanwhile, the gate plate 601 slides more stably through the guide rod 605 within the guide sleeve 607. Both the inner cavity cross-sectional shapes of the guide rod 605 and the guide sleeve 607 are arc-shaped. The gate plate 601 can stably slide into the accommodation groove under the guidance of the guide rod 605. Moreover, the second spring 606 outside the guide rod 605 can use its own elastic force to keep the gate plate 601 closed within the air inlet, thereby avoiding the gate plate 601 being opened due to shaking impact during water body shaking and affecting the stability within the static box 4. Among them, the sampling machine main body 5 can be a pump body with quantitative suction control. It sucks the greenhouse gas floating on the water surface within the static box 4 through the suction nozzle, and the sampling machine main body 5 is connected to the inner side of the static box 4 through the bottom plate 11.

[0025] Please refer to Figure 3 , a plurality of vacuum gas storage bags 9 are arranged equidistantly around the axis within the inner cavity of the sample box 12. The gas injection ports of the vacuum gas storage bags 9 are located on the radial side of the rotation stroke of the rotary inflation head 10. Please refer to Figures 7 - 8 , the control mechanism 8 includes a fixed ring 801 and a rotating ring 805. The outside of the rotating ring 805 is connected to the inner side of the driving ring 604 through a connecting plate 807. The fixed ring 801 is connected to the bottom of the inner cavity of the static box 4. A plurality of sliding holes are formed around the top of the fixed ring 801. A lifting rod 804 is slidably connected within the sliding holes. The bottom end of the lifting rod 804 is in contact with a wedge block 806 provided at the corresponding position on the top of the rotating ring 805. By rotating the driving ring 604, the wedge block 806 is driven to squeeze the lifting rod 804. The top end of the lifting rod 804 is connected to a connecting rod 802. A third spring is sleeved outside the lifting rod 804, and both ends of the third spring are respectively connected to the corresponding positions on one side of the fixed ring 801 and the connecting rod 802. The other end of the connecting rod 802 is connected to a top rod 803 at the top. The top rod 803 passes through the static box 4 and the sample box 12 and is connected to the bottom side of the rotary inflation head 10. The cross-sectional shape of the wedge block 806 is triangular, and the inclined surface at the top of the wedge block 806 fits with the bottom of the lifting rod 804.

[0026] Through the designed control mechanism 8, when the driving ring 604 rotates, it can drive the inner rotating ring 805 to rotate through the connecting plate 807. The rotation of the rotating ring 805 can drive the wedge block 806 to squeeze the lifting rod 804. When the lifting rod 804 is squeezed, it can drive the top rod 803 and the rotary inflation head 10 to move upward. The upward moving rotary inflation head 10 can disconnect the connector from the vacuum gas storage bag 9 at the corresponding position. Thus, the connection between the rotary inflation head 10 and the vacuum gas storage bag 9 can be controlled in a linkage manner through the control mechanism 8, which is beneficial to stopping the disconnection of the sampling by the rotary inflation head 10 when the static box 4 is in the exhaust state through linkage control. Through the designed third spring, after the gate plate 601 resets to close the air inlet, the ejector rod 803 can pull the rotary inflator head 10 to reset by the elastic force of the third spring, completing the connection between the rotary inflator head 10 and the vacuum storage bag 9 at the corresponding position.

[0027] Among them, the rotary inflator head 10 is an inflator head with a rotary mechanism. The inflator head has a nozzle matching the interface of the vacuum storage bag 9, and the inflator head is connected to the gas outlet of the sampling machine main body 5 through a gas-liquid slip ring and a pipeline. The rotary mechanism is a mature technology in the related field and will not be elaborated here; Among them, the top of the sample box 12 has a corresponding cover to close the inner cavity of the sample box 12, and the cover can be opened by a buckle or a threaded fit; In another embodiment, a corresponding solar power supply component can be arranged on the surface of the floating bag 301, and the sampling machine main body 5 can be powered by the solar power supply component.

[0028] In the present invention, the terms "first" and "second" are only used for the purpose of description and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A greenhouse gas detection device, comprising an outer support ring (1), characterized in that: A plurality of floating body mechanisms (3) are arranged around the axis inside the outer support ring (1), and the inner side of the floating body mechanism (3) is connected to the inner side of the inner support ring (2), and the top of the inner support ring (2) is connected to a static box (4), and a sample box (12) is installed on the top of the static box (4), and a sampling machine body (5) is installed in the static box (4), and greenhouse gases in the sample box (12) are extracted into the sample box (12) through the sampling machine body (5); The static box (4) is provided with a plurality of air inlets on its outer circumference, and an openable and closable ventilation assembly (6) is provided in the air inlet. A driving mechanism (7) is installed on one side of the ventilation assembly (6), and the driving mechanism (7) is connected to the static box (4). The opening and closing of the ventilation assembly (6) in the air inlet is controlled by the driving mechanism (7). A control mechanism (8) is connected to one side of the driving mechanism (7) in a transmission manner. A rotating gas charging head (10) is connected in a liftable manner in the sample box (12). The control mechanism (8) extends into the sample box (12) and controls the lifting and lowering of the rotating gas charging head (10). The lifting and lowering of the rotating gas charging head (10) is controlled by the opening and closing of the air inlet, so as to control the concentration of the sampled gas in the static box (4).

2. A greenhouse gas detection device according to claim 1, characterized in that: The floating body mechanism (3) comprises a floating bladder (301), an energy absorbing ring block (310) is provided on the inner side of the floating bladder (301), the inner side of the energy absorbing ring block (310) is connected to the outer side of the inner support ring (2) via a universal joint (307), the floating bladder (301) is connected to fixed blocks (306) on both sides corresponding to the energy absorbing ring block (310) and the outer support ring (1), one side of the fixed block (306) is connected to a hinge block (305), the hinge block (305) is rotatably connected to a hinge seat (304) on the outer side, and the hinge seat (304) on the side corresponding to the energy absorbing ring block (310) is connected to the hinge seat (305). 4) A guide rod (302) is connected to one side of the energy absorbing ring block (310) and to a hinge seat (304) corresponding to one side of the outer support ring (1). The guide rod (302) is slidably connected to a guide hole provided in a side wall of the outer support ring (1). A first spring (303) is provided on the outer sleeve of the guide rod (302). Two ends of the first spring (303) are respectively connected to the end of the guide rod (302) and a corresponding position on one side of the outer support ring (1). A rotating pair buffering energy absorption is formed through the hinge seats (304) and the hinge blocks (305) on both sides of the floating bag (301).

3. A greenhouse gas detection device according to claim 1, characterized in that: Both sides of the plurality of energy absorbing ring blocks (310) are connected to a first fixing plate (308) and a second fixing plate (309), and one side of the first fixing plate (308) is connected to a sleeve hoop (311), and an inner cavity of the sleeve hoop (311) is provided with a plurality of elastic force blocks (312) around the axis, and a pressure block (313) is slidably connected inside the sleeve hoop (311), and one side of the pressure block (313) is connected to one side of the second fixing plate (309) through a rod body, and the elastic force block (312) is pressed by the movement of the rod body to absorb the shaking of the energy absorbing ring blocks (310) on both sides.

4. A greenhouse gas detection device according to claim 1, characterized in that: The diameter of the hoop (311) is smaller than the diameter of the inner wall of the hoop (311), and the hoop (311) is limited in the hoop (311) by the elastic block (312), and the second fixing plate (309) squeezes the elastic block (312) to absorb energy and buffer through the movement of the rod body and the pressing block (313) in the hoop (311).

5. A greenhouse gas detection device according to claim 1, characterized in that: The ventilation assembly (6) comprises a plurality of gate plates (601) arranged in a circumferential manner in the air inlet, a first rotating block (602) being connected to the bottom of one side of the gate plate (601), a second rotating block (603) being rotatably connected to the bottom of the first rotating block (602), a driving ring (604) being connected between the plurality of second rotating blocks (603), and the driving ring (604) being transmission-connected to one side of a driving mechanism (7), so that the driving mechanism (7) drives the driving ring (604) to rotate and pull the gate plate (601) to move in the air inlet.

6. A greenhouse gas detection device according to claim 5, characterized in that: A guide rod (605) is connected to one side of the gate plate (601), and a guide sleeve (607) is disposed on the outer sleeve of the guide rod (605). A receiving groove for the gate plate (601) to slide into is provided on the inner side of the air inlet. The guide rod (605) extends to a travel groove provided on the inner bottom of the receiving groove corresponding to one side of the guide rod (605). The guide sleeve (607) is connected to the travel groove. A second spring (606) is disposed on the outer sleeve of the guide rod (605), and two ends of the second spring (606) are respectively connected to corresponding positions of the guide sleeve (607) and one side of the first rotating block (602).

7. A greenhouse gas detection device according to claim 5, characterized in that: The driving mechanism (7) comprises a connecting rod (703) rotatably connected to the bottom of the driving ring (604); the other end of the connecting rod (703) is rotatably connected to a push block (702); one side of the push block (702) is connected to an electric push rod (701); and the electric push rod (701) is connected to one side of the inner cavity of the static box (4).

8. A greenhouse gas detection device according to claim 1, characterized in that: The control mechanism (8) comprises a fixed ring (801) and a rotating ring (805), the outer side of the rotating ring (805) is connected to the inner side of the driving ring (604) via a connecting plate (807), the fixed ring (801) is connected to the bottom of the inner cavity of the static box (4), a plurality of sliding holes are arranged around the top of the fixed ring (801), and a lifting rod (804) is slidably connected in the sliding hole, and the bottom end of the lifting rod (804) contacts a wedge block (806) arranged at a corresponding position on the top of the rotating ring (805), and the lifting rod (804) is driven by the driving mechanism (801). The ring (604) rotates to drive the wedge block (806) to squeeze the lifting rod (804); the top of the lifting rod (804) is connected to a connecting rod (802); the outer sleeve of the lifting rod (804) is provided with a third spring; the two ends of the third spring are respectively connected to the corresponding positions of the fixing ring (801) and one side of the connecting rod (802); the top of the other end of the connecting rod (802) is connected to a push rod (803); the push rod (803) passes through the static box (4) and the sample box (12) and is connected to the bottom side of the rotating inflation head (10).

9. A greenhouse gas detection device according to claim 8, characterized in that: The inner cavity of the sample box (12) is provided with a plurality of vacuum gas storage bags (9) arranged equidistantly around the axis, and the gas injection port of the vacuum gas storage bag (9) is located on one side of the radial direction of the rotation stroke of the rotary inflation head (10).

10. A greenhouse gas detection device according to claim 8, characterized in that: The cross-sectional shape of the wedge block (806) is triangular, and the top inclined surface of the wedge block (806) fits the bottom of the lifting rod (804).

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