Water-land transition in-situ ecosystem greenhouse gas collection device based on water level control

Abstract

The utility model discloses a water-land transition in-situ ecological system greenhouse gas collecting device based on water level control. The collecting device comprises a top cover, a box body and a base, the top cover for gas collection is a cylinder with a sealed top and connected with a collection device, and is in sealed connection with a cylindrical box body with two open ends for controlling the height of the device through a first cylinder with two open ends for sealing. And the cylindrical box body is hermetically connected with the base through a second cylinder with two open ends. The base is divided into a cylindrical base for long-term in-situ fixation and a water level control unit connected to the right side, wherein the two ends of the cylindrical base are open. The water level control unit comprises a transparent cylinder water gauge with scales, water pumping equipment and a cylinder used for storing water, wherein the bottom end of the cylinder is sealed. The utility model has the following advantages: core equipment is relatively concentrated, the instrument is convenient to carry and maintain, the specification of the device can be flexibly selected according to actual requirements, and the device is suitable for complex and changeable field environmental conditions.

Description

Technical Field

[0001] The utility model relates to the fields of ecological environment and biogeochemistry, in particular to a greenhouse gas collection device for an aquatic-terrestrial transition in-situ ecosystem based on water level control. Background Art

[0002] Under the background of climate change, climate warming has brought about changes in the global water cycle, causing frequent fluctuations in water levels in shallow wetland areas around the world, which has led to high variability in greenhouse gas emissions in water-land transition areas. Therefore, there is still a lot of room for research to explore the mechanism of changing water levels and carbon emissions and accurately assess greenhouse gas emissions in wetland water-land transition areas. At present, due to the characteristics of simple operation, low price and easy transfer, the static box method is widely used for in-situ monitoring of small-scale greenhouse gas emissions, and different forms such as fixed base static box method and static floating box method have been developed for different water levels such as terrestrial ecosystems and aquatic ecosystems. In order to ensure the airtightness of the device, terrestrial ecosystems often choose to fix the base in the soil, while aquatic ecosystems are limited by water depth and place the base at a certain water depth and perform a sealing design at the water-air interface. At the same time, a fixed height box is used for gas collection. In order to match different vegetation heights, some devices design the top box to be retractable or at different heights. However, in shallow water ecosystems at the water-land interface, both the stability of the experimental site and the inconvenience caused by the water depth must be considered. In terms of water level control, in the past, when measuring water level variables in situ, we either set up multiple sets of static box experiments at different water depths, or set up multiple sets of control experiments by artificially increasing or decreasing water levels. Both methods cause great damage to the sample sites during gas collection and manual water level adjustment, and cost a lot of time and money. In the design of gas collection devices, fans, thermometers, etc. were usually designed in large boxes. Due to the difficulty of working in water, it is not conducive to the convenience of sampling in water and the maintenance and replacement of equipment in the later stage.

[0003] The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. Utility Model Content

[0004] Problems to be solved by utility models

[0005] As described above, the utility model device aims at the defects of the above-mentioned prior art and provides a greenhouse gas collection device for a water-land transition in-situ ecosystem based on water level control. The device (1) is small in size and low in cost; (2) meets the requirements of in-situ experimental stability and experimental device sealing; (3) adds a water level control unit to ensure that the water level within the sampling period meets the experimental expectations; (4) the core equipment is relatively centralized, which is convenient for carrying and maintaining the instrument. The device specifications can be flexibly selected according to actual needs, and it is suitable for complex and changeable environmental conditions in the field. It is suitable for the collection of greenhouse gases in a water-land transition in-situ ecosystem experiment based on water level control.

[0006] Solutions to the problem

[0007] The utility model device has been studied in depth to achieve the above-mentioned purpose. Specifically, the utility model provides a greenhouse gas collection device for an aquatic-terrestrial transition in-situ ecosystem based on water level control. The aquatic-terrestrial transition in-situ ecosystem greenhouse gas collection device based on water level control comprises a top cover, a box body and a base, wherein:

[0008] The top cover includes a cylindrical top cover, a temperature measuring unit, a gas collection unit, a first valve, a second valve, a gas collection syringe, and a gas mixing fan, specifically,

[0009] A cylindrical top cover is a cylindrical structure for collecting greenhouse gases, the top end is sealed and the bottom end is provided with an opening, the bottom end opening is sealed and connected to the top end of the first cylindrical interface, the cylindrical top cover includes a first sealing opening, a second sealing opening and a third sealing opening,

[0010] The temperature measuring unit is fixed to the middle part of the inner part of the cylindrical top cover via the first sealing port.

[0011] A gas collection unit, the bottom end of the gas collection conduit through the second sealing port is connected to the cylindrical structure, and the gas collection unit includes:

[0012] The first valve is arranged at the top of the gas collection conduit and is used to control the on-off of the gas in the cylindrical structure of the greenhouse gas collection device.

[0013] The second valve has its bottom end connected to the first valve and its top end connected to the gas collection syringe, and is used to collect and seal the gas in the gas collection syringe.

[0014] A gas sampling syringe, which is used to collect and temporarily store sampled gas.

[0015] A gas mixing fan, which is arranged inside the cylindrical top cover and extends downward to the inside of the cylindrical box, and whose first wire is connected to the first power supply via the third sealing port, is used to mix the air inside the cylindrical box evenly;

[0016] The box body includes a first cylindrical interface and a cylindrical box body, specifically,

[0017] The first cylindrical interface is a cylindrical structure with openings at both ends and a sealing function, the top end of which is connected to the bottom end of the cylindrical top cover, and the bottom end of which is connected to the opening at the upper end of the cylindrical box body.

[0018] The cylindrical box is a cylindrical structure with openings at both ends, which is used to seal the above-ground plant space and control the height of the entire device;

[0019] The base includes a second cylindrical interface, a cylindrical fixed base and a water level control unit, specifically,

[0020] The second cylindrical interface is a cylindrical structure with openings at both ends and a sealing function, the bottom end of which is connected to the opening at the upper end of the cylindrical fixed base, and the top end is connected to the bottom end of the cylindrical box.

[0021] The cylindrical fixed base is a cylindrical structure with two openings at both ends for long-term in-situ fixation. The top of the opening is sealed and connected to the bottom of the second cylindrical interface.

[0022] A water level control unit is arranged on the right side of the cylindrical fixed base, and comprises a transparent cylindrical water level gauge with a scale, a third valve, a pumping device and a water storage cylinder with a bottom seal for storing water.

[0023] The bottom end of the transparent cylindrical water level gauge is connected to the cylindrical fixed base and is used to measure the water level. The upper end is provided with a detachable sealing ring.

[0024] The third valve is located between the transparent cylindrical water level gauge and the pumping equipment to control the water flow between the pumping equipment and the water storage equipment.

[0025] The pumping equipment has one end connected to a transparent cylindrical water level gauge and equipped with a third valve, and the other end connected to a water storage cylinder.

[0026] The water storage cylinder is a cylindrical structure with a sealed bottom end. The left side is connected to the pumping equipment, and the right side is provided with a second power supply and a second wire connected to the pumping equipment.

[0027] The diameter of the cylindrical fixed base is 30 cm, the height is 30 cm, and the thickness is 3 mm. The connection point of the water level control unit is located 10 cm away from the top of the cylindrical fixed base.

[0028] The transparent cylindrical water level gauge is a transparent cylindrical structure with scales and is equipped with a water level control sensor. One side of the bottom end is connected to the cylindrical fixed base and fixed to the right side of the cylindrical fixed base, and the other side is connected to the pumping equipment. The upper end is provided with a detachable sealing ring.

[0029] The diameter of the transparent cylindrical water level gauge is 2cm and the height is 150cm.

[0030] One end of the pumping device is connected to a transparent cylindrical water level gauge and equipped with a third valve, and the other end is connected to a water storage cylinder and connected to a second power supply on the water storage cylinder through a second wire.

[0031] The specification of the pumping equipment is 10cm*10cm*10cm, and a water outlet and a water inlet are respectively arranged at both ends and connected to a transparent cylindrical water level gauge and a water storage cylinder.

[0032] The third valve includes a processing unit for controlling the opening and closing of the valve, the processing unit is a digital signal processor, an application-specific integrated circuit ASIC or a field programmable gate array FPGA, the processing unit includes a memory and a timer, the memory may include one or more read-only memories ROM, random access memories RAM, flash memories or electronically erasable programmable read-only memories EEPROM,

[0033] The water storage cylinder is a cylindrical structure, and the left side is connected to the pumping equipment.

[0034] The diameter of the water storage cylinder structure is 30cm, the height is 100cm, and the thickness is 3mm.

[0035] The first cylindrical interface and the second cylindrical interface are cylindrical structures, and the inner walls thereof are provided with rubber rings to ensure air tightness.

[0036] The first cylindrical interface and the second cylindrical interface have a diameter of 30.6 cm, a height of 20 cm, and a thickness of 3 mm.

[0037] The cylindrical top cover has a diameter of 30 cm, a height of 20 cm, and a thickness of 3 mm.

[0038] The cylindrical box has a diameter of 30 cm and a thickness of 3 mm. Its height can be set to different specifications of 10 cm, 30 cm, 50 cm, 80 cm, 100 cm, and 150 cm according to the actual height of the vegetation above the ground and the target water level.

[0039] The gas collection unit comprises a processing unit for controlling the first valve and the second valve,

[0040] The temperature measuring unit is connected to the first sealing port via a silicone seal, and the temperature measuring unit includes an automatic recording thermometer.

[0041] The first wire is connected to the third sealing port via a silicone seal, the first power source and the second power source include batteries,

[0042] The first valve, the second valve and the third valve are three-way valves.

[0043] The predetermined volume of the gas sampling syringe is 60 ml.

[0044] The utility model discloses a greenhouse gas collection device for an aquatic-terrestrial transition in-situ ecosystem based on water level control. The device (1) is small in size and low in cost; (2) meets the requirements of in-situ experimental stability and experimental device sealing; (3) adds a water level control unit to ensure that the water level within the sampling period meets the experimental expectations; (4) the core equipment is relatively centralized, which is convenient for carrying and maintaining the instrument. The device specifications can be flexibly selected according to actual needs, and is suitable for complex and changeable environmental conditions in the field. Therefore, the device is suitable for the collection of greenhouse gases in an aquatic-terrestrial transition in-situ ecosystem experiment based on water level control.

[0045] The above description is only an overview of the technical solution of the utility model. In order to make the technical means of the utility model clearer and to achieve the extent that those skilled in the art can implement it according to the contents of the specification, and in order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are exemplified below. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] [ Figure 1 ] shows a schematic structural diagram of an in-situ ecosystem greenhouse gas collection device based on water level control according to an embodiment of the utility model.

[0047] [ Figure 2 ] shows a schematic diagram of the top cover structure of an in-situ ecosystem greenhouse gas collection device based on water level control according to an embodiment of the utility model.

[0048] [ Figure 3 ] shows a schematic diagram of the box structure of an in-situ ecosystem greenhouse gas collection device based on water level control according to an embodiment of the utility model.

[0049] [ Figure 4 ] shows a schematic diagram of the base structure of an in-situ ecosystem greenhouse gas collection device based on water level control according to an embodiment of the utility model. DETAILED DESCRIPTION

[0050] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the specific embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0051] It should be noted that certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that technicians may use different nouns to refer to the same component. This specification and claims do not use the difference in nouns as a way to distinguish components, but use the difference in the functions of the components as the criterion for distinction. As mentioned throughout the specification and claims, "including" or "comprising" is an open term, so it should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of the implementation of the utility model, but the description is based on the general principles of the specification and is not used to limit the scope of the utility model. The scope of protection of the utility model shall be determined by the definition of the attached claims.

[0052] To facilitate the understanding of the embodiments of the present utility model, several specific embodiments will be further explained below with reference to the accompanying drawings, and each of the accompanying drawings does not constitute a limitation on the embodiments of the present utility model.

[0053] Specifically, if Figure 1-4 As shown, the water-land transition in-situ ecosystem greenhouse gas collection device based on water level control (attached Figure 1 ) includes a top cover 21 (attached Figure 2 )、Box 22 (with Figure 2 ) and base 23 (attached Figure 4 ),in,

[0054] The top cover 21 includes a cylindrical top cover, a temperature measuring unit, a gas collection unit, a first valve, a second valve, a gas collection syringe, and a gas mixing fan, specifically,

[0055] The cylindrical top cover 21 for collecting greenhouse gases has a sealed top and an opening at the bottom, wherein the bottom opening is sealed and connected to the top of the first cylindrical interface 14, and the cylindrical top cover 21 includes a first sealing opening 7, a second sealing opening 8 and a third sealing opening 9.

[0056] The temperature measuring unit 1 is fixed to the middle of the cylindrical top cover 21 via the first sealing opening 7.

[0057] The gas collection unit is connected to the cylindrical structure 21 through the bottom end of the gas collection conduit 10 of the second sealing port 8. The gas collection unit includes:

[0058] The first valve 4 is disposed at the top of the gas collection conduit 10 and is used to control the on-off of the gas in the cylindrical box 22 of the greenhouse gas collection device.

[0059] The second valve 3, whose bottom end is connected to the first valve 4 and whose top end is connected to the gas collection syringe 2, is used to collect and seal the gas in the gas collection syringe.

[0060] The gas sampling syringe 2 is used to collect and temporarily store the sampled gas.

[0061] The gas mixing fan 11 is arranged inside the cylindrical top cover 21 and extends downward to the inside of the cylindrical box 22. The first wire 5 is connected to the first power supply 6 via the third sealing port 9, and is used to mix the air inside the cylindrical box 22 evenly.

[0062] The first cylindrical interface 14 is a cylindrical structure with openings at both ends and a sealing function, the top end of which is connected to the bottom end of the cylindrical top cover 21, and the bottom end of which is connected to the upper opening of the cylindrical box body 22.

[0063] The cylindrical box 22 is a cylindrical structure with openings at both ends, which is used to seal the plant space above the ground and control the height of the entire device.

[0064] The second cylindrical interface 15 is a cylindrical structure with openings at both ends and a sealing function, the bottom end of which is connected to the opening at the upper end of the cylindrical fixed base 23, and the top end of which is connected to the bottom end of the cylindrical box 22.

[0065] The base includes a fixed base 23 and a water level control unit. The cylindrical fixed base 23 is a cylindrical structure with two ends opened for long-term in-situ fixation. The top of the opening is sealed and connected to the bottom of the second cylindrical interface 15.

[0066] The water level control unit is arranged on the right side of the cylindrical fixed base, and comprises a transparent cylindrical water level gauge 13 with scale, a third valve 19, a pumping device 18 and a water storage cylinder 20 with a bottom seal for storing water.

[0067] The bottom end of the transparent cylindrical water level gauge 13 is connected to the cylindrical fixed base 23 for measuring the water level, and the upper end is provided with a detachable sealing ring 12.

[0068] The third valve 19 is provided between the transparent cylindrical water level gauge 13 and the pumping device 18, and is used to control the water passage between the pumping device 18 and the water storage device 20.

[0069] The pumping device 18 has one end connected to the transparent cylindrical water level gauge 13 and equipped with a third valve 19, and the other end connected to the water storage cylinder 20.

[0070] The water storage cylinder 20 is a cylindrical structure with a sealed bottom end. The left side is connected to the pumping device 18. The right side is provided with a second power supply 17 and a second wire 16 connected to the pumping device 18.

[0071] The diameter of the cylindrical structure of the cylindrical fixed base 23 is 30 cm, the height is 30 cm, and the thickness is 3 mm. The connection point of the water level control unit is located 10 cm away from the top of the cylindrical fixed base 23.

[0072] The transparent cylindrical water level gauge 13 is a transparent cylindrical structure with scales and is equipped with a water level control sensor. One side of the bottom end is connected to the cylindrical fixed base 23 and fixed to the right side of the cylindrical fixed base 23, and the other side is connected to the pumping equipment 18. The upper end is provided with a detachable sealing ring 12.

[0073] The diameter of the transparent cylindrical water level gauge 13 cylindrical structure is 2cm and the height is 150cm.

[0074] One end of the pumping device 18 is connected to the transparent cylindrical water level gauge 13 and equipped with a third valve 19, and the other end is connected to the water storage cylinder 20 and connected to the second power supply 17 on the water storage cylinder through the second wire 16.

[0075] The specification of the pumping device 18 is 10cm*10cm*10cm, and a water outlet and a water inlet are respectively provided at both ends, and are connected to the transparent cylindrical water level gauge 13 and the water storage cylinder 20.

[0076] The third valve 19 includes a processing unit for controlling the opening and closing of the valve. The processing unit is a digital signal processor, an application-specific integrated circuit ASIC or a field programmable gate array FPGA. The processing unit includes a memory and a timer. The memory may include one or more read-only memories ROM, random access memories RAM, flash memories or electronically erasable programmable read-only memories EEPROM.

[0077] The water storage cylinder 20 is a cylindrical structure, and the left side is connected to the pumping equipment 18.

[0078] The diameter of the water storage cylinder 20 is 30 cm, the height is 100 cm, and the thickness is 3 mm.

[0079] The first cylindrical interface 14 and the second cylindrical interface 15 are cylindrical structures, and the inner walls thereof are provided with rubber rings to ensure air tightness.

[0080] The first cylindrical interface 14 and the second cylindrical interface 15 have a diameter of 30.6 cm, a height of 20 cm, and a thickness of 3 mm.

[0081] The cylindrical top cover 21 has a diameter of 30 cm, a height of 20 cm, and a thickness of 3 mm.

[0082] The cylindrical box 22 has a diameter of 30 cm and a thickness of 3 mm. Its height can be set to different specifications of 10 cm, 30 cm, 50 cm, 80 cm, 100 cm, and 150 cm according to the actual height of the vegetation above the ground and the target water level.

[0083] The gas sampling unit comprises a processing unit for controlling the first valve 4 and the second valve 3,

[0084] The temperature measuring unit 1 is connected to the first sealing port 7 via a silicone seal, and the temperature measuring unit 1 includes an automatic recording thermometer.

[0085] The first wire 5 is connected to the third sealing port via a silicone seal, the first power source 6 and the second power source include batteries,

[0086] The first valve 4, the second valve 3 and the third valve 19 are three-way valves.

[0087] The predetermined volume of the gas sampling syringe 2 is 60 ml.

[0088] To further understand the present invention, in one embodiment, a water-land transition in-situ ecosystem greenhouse gas collection device based on water level control includes a top cover (attached Figure 2 )、Box(with Figure 3 ) and base (with Figure 4 ) three parts, the top cover 21 is a cylindrical structure with a top seal and an opening at the lower end, the top cover 21 is connected to a gas collection tube 10 with a first valve 4 three-way valve at the top, the gas collection tube 10 is connected to a second valve 3 three-way valve, and the second valve 3 three-way valve is connected to a gas sampling syringe 2.

[0089] Furthermore, the top cover 21 is made of opaque PVC material, with a diameter of 30 cm and a height of 20 cm. The thickness of the PVC board is 3 mm, and all joints are bonded by hot melt adhesive.

[0090] Furthermore, the sampling top cover 21 has three sealing ports on the top and bottom surfaces, namely a first sealing port, a second sealing port and a third sealing port, which are respectively used to place a thermometer 1, install a gas sampling tube 10 connected to a three-way valve, and fix the wire 5 between the disturbance fan 11 and the first battery 6.

[0091] Furthermore, the gas collection pipe 10 and the top cover 21 as well as the top cover 21 and the three-way valve of the first valve 4 are bonded by hot-melt bonding and reinforced with silicone.

[0092] Furthermore, the box body 22 is made of opaque PVC material, has a diameter of 30 cm and a thickness of 3 mm, and its height can be set to different specifications of 10 cm, 30 cm, 50 cm, 80 cm, 100 cm, and 150 cm according to the actual height of vegetation above ground and the target water level.

[0093] Furthermore, the first cylindrical interface 14 and the second cylindrical interface 15 are cylindrical structures, and rubber rings are provided on the inner walls thereof to ensure air tightness.

[0094] Furthermore, the first cylindrical interface 14 and the second cylindrical interface 15 have a diameter of 30.6 cm, a height of 20 cm, and a thickness of 3 mm.

[0095] Furthermore, the cylindrical fixed base 23 of the base is made of opaque PVC material, with a diameter of 30 cm, a height of 30 cm, and a thickness of 3 mm. The connection point of the water level control unit is located 10 cm away from the top of the cylindrical fixed base 23.

[0096] Furthermore, the water level control unit includes a transparent cylindrical water level gauge 13 with a scale, a third valve 19, a pumping device 18 and a bottom-sealed water storage cylinder 20 for storing water. The water level control unit is arranged on the right side of the cylindrical fixed base 23.

[0097] Furthermore, the bottom end of the transparent cylindrical water level gauge 13 is connected to the cylindrical fixed base 23 for measuring the water level, and the upper end is provided with a detachable sealing ring 12.

[0098] Furthermore, one end of the pumping device 18 is connected to the transparent cylindrical water level gauge 13 and is equipped with a third valve 19 for controlling the water passage between the pumping device 18 and the water storage device 20 , and the other end is connected to the water storage cylinder 20 .

[0099] Furthermore, the water storage cylinder 20 is provided with a second power supply 17 and a second wire 16 connected to a water pumping device 18 on the right side.

[0100] Furthermore, the transparent cylindrical water level gauge 13 is a transparent cylindrical structure with scales and is equipped with a water level control sensor. One side of the bottom end is connected to the cylindrical structure base and fixed to the right side of the cylindrical fixed base 23, and the other side is connected to the pumping equipment 18. The upper end has a detachable sealing ring 12.

[0101] Furthermore, the diameter of the cylindrical structure of the transparent cylindrical water level gauge 13 is 2 cm and the height is 150 cm.

[0102] Furthermore, one end of the pumping device 18 is connected to the transparent cylindrical water level gauge 13 and is equipped with a third valve 19, and the other end is connected to the water storage cylinder 20 and is connected to the second power supply 17 on the water storage cylinder through the second wire 16.

[0103] Furthermore, the specification of the pumping equipment 18 is 10cm*10cm*10cm, and a water outlet and a water inlet are respectively provided at both ends and connected to the transparent cylindrical water level gauge 13 and the water storage cylinder 20.

[0104] Furthermore, the third valve 19 includes a processing unit for controlling the opening and closing of the valve, and the processing unit is a digital signal processor, an application-specific integrated circuit ASIC or a field programmable gate array FPGA. The processing unit includes a memory and a timer. The memory may include one or more read-only memories ROM, random access memories RAM, flash memories or electronically erasable programmable read-only memories EEPROM.

[0105] Furthermore, the water storage cylinder 20 is a cylindrical structure, and the left side is connected to the pumping equipment 18.

[0106] Furthermore, the diameter of the water storage cylinder 20 structure is 30 cm, the height is 100 cm, and the thickness is 3 mm.

[0107] Furthermore, before the experiment begins, the cylindrical fixed base 23 is buried to a depth of 10 cm in the soil, and the third valve 19, the three-way valve and the pumping equipment 18 are ensured to be above the ground surface. When there is sufficient water on the surface, the third valve 19, the three-way valve and the pumping equipment 18 are opened, and the surface water is stored in the water storage cylinder 20 through the cylindrical fixed base 23, the third valve 19, the three-way valve and the pumping equipment 18 until the water storage cylinder 20 stores an appropriate amount of water, the pumping equipment 18 stops working, and the third valve 19, the three-way valve is closed; when the surface water is insufficient, the water storage cylinder 20 is artificially replenished with water.

[0108] Furthermore, the box is assembled in sequence and the sealing is ensured, that is, the cylindrical fixed base 23 is connected to the second cylindrical interface 15, connected to the box 22, connected to the first cylindrical interface 14, and connected to the top cover 21, while ensuring that the temperature measurement unit 1, the gas collection pipe 10 and the first valve 4 three-way valve, and the disturbance fan 11 are on the corresponding first sealing port 7, second sealing port 8 and third sealing port 9.

[0109] Furthermore, after the box is assembled, the three-way valve of the first valve 4, the sealing ring 12 of the transparent cylindrical water level gauge 13 and the three-way valve of the third valve 19 are opened to ensure the gas connectivity inside and outside the sampling box, and sufficient water is added to the water storage cylinder 20. Then, the target water level is set through the transparent cylindrical water level gauge 13, and the pumping equipment 18 is responsible for the water exchange between the water storage cylinder 20 and the cylindrical fixed base 23. When the transparent cylindrical water level gauge 13 senses that the water level has reached the target water level, the pumping equipment 18 stops working, the three-way valve of the third valve 19 is automatically closed, and the transparent cylindrical water level gauge 13 is sealed with the sealing ring 12, and gas collection is started.

[0110] Further, gas collection work is started. First, the disturbance fan 11 is turned on, and the gas collection tube 10 is connected to the first valve 4 three-way valve. The first valve 4 three-way valve is closed and the timing is started. After the timing is over, the disturbance fan 10 is turned off, the first valve three-way valve is connected to the second valve 3 three-way valve, the second valve 3 three-way valve is connected to the gas sampling syringe 2, and the first valve 4 three-way valve and the second valve 3 three-way valve are opened in sequence, and the gas sampling syringe 2 is controlled to temporarily store the gas in the syringe, and it is sealed with the second valve 3 three-way valve. Then, the gas is transferred to the prepared air bag for storage by controlling the three-way valve and the syringe.

[0111] Furthermore, the temperature measuring unit is a mercury thermometer that records temperature data.

[0112] Industrial Applicability

[0113] The water-land transition in-situ ecosystem greenhouse gas collection device of the utility model based on water level control can be manufactured and used in the field of ecological environment.

[0114] Although the embodiments of the utility model are described above in conjunction with the accompanying drawings, the utility model is not limited to the above-mentioned specific embodiments and application fields, and the above-mentioned specific embodiments are only illustrative and instructive, rather than restrictive. A person of ordinary skill in the art can also make many forms under the enlightenment of this specification and without departing from the scope of protection of the claims of the utility model, which all belong to the protection of the utility model.

Claims

1. A greenhouse gas collection device for an in-situ ecosystem of water-land transition based on water level control, characterized in that: The collection device includes a top cover, a box body and a base, wherein: The top cover includes a cylindrical top cover, a temperature measuring unit, a gas collection unit, a first valve, a second valve, a gas collection syringe, and a gas mixing fan, specifically, A cylindrical top cover, a cylindrical structure, a cylindrical structure for collecting greenhouse gases, the top end of which is sealed and the bottom end is provided with an opening, the bottom end opening is sealed and connected to the top end of the first cylindrical interface, the cylindrical top cover includes a first sealing opening, a second sealing opening and a third sealing opening, The temperature measuring unit is fixed to the middle part of the inner part of the cylindrical top cover via the first sealing port. A gas collection unit, the bottom end of the gas collection conduit through the second sealing port is connected to the cylindrical structure, and the gas collection unit includes: The first valve is arranged at the top of the gas collection conduit and is used to control the on-off of the gas in the cylindrical structure of the greenhouse gas collection device. The second valve has a bottom end connected to the first valve and a top end connected to the gas collection syringe, and is used to collect and seal the gas in the gas collection syringe. A gas sampling syringe, which is used to collect and temporarily store sampled gas. A gas mixing fan, which is arranged inside the cylindrical top cover and extends downward to the inside of the cylindrical box, and whose first wire is connected to the first power supply via the third sealing port, is used to mix the air inside the cylindrical box evenly; The box body includes a first cylindrical interface and a cylindrical box body, specifically, The first cylindrical interface is a cylindrical structure with openings at both ends and a sealing function, the top end of which is connected to the bottom end of the cylindrical top cover, and the bottom end of which is connected to the opening at the upper end of the cylindrical box body. The cylindrical box is a cylindrical structure with openings at both ends, which is used to seal the above-ground plant space and control the height of the entire device; The base includes a second cylindrical interface, a cylindrical fixed base and a water level control unit, specifically, The second cylindrical interface is a cylindrical structure with openings at both ends and a sealing function, the bottom end of which is connected to the opening at the upper end of the cylindrical fixed base, and the top end is connected to the bottom end of the cylindrical box. The cylindrical fixed base is a cylindrical structure with two openings at both ends for long-term in-situ fixation. The top of the opening is sealed and connected to the bottom of the second cylindrical interface. A water level control unit is arranged on the right side of the cylindrical fixed base, and comprises a transparent cylindrical water level gauge with a scale, a third valve, a pumping device and a water storage cylinder with a bottom seal for storing water. The bottom end of the transparent cylindrical water level gauge is connected to the cylindrical fixed base and is used to measure the water level. The upper end is provided with a detachable sealing ring. The third valve is located between the transparent cylindrical water level gauge and the pumping equipment to control the water flow between the pumping equipment and the water storage equipment. The pumping equipment has one end connected to a transparent cylindrical water level gauge and equipped with a third valve, and the other end connected to a water storage cylinder. The water storage cylinder is a cylindrical structure with a sealed bottom end, the left side of which is connected to the pumping equipment, and the right side is provided with a second power supply and a second wire connected to the pumping equipment.

2. The greenhouse gas collection device for in-situ ecosystem of water-land transition based on water level control according to claim 1 is characterized by: The base includes a second cylindrical interface, a cylindrical fixed base and a water level control unit.

3. The greenhouse gas collection device for the land-water transition in-situ ecosystem based on water level control according to claim 1 is characterized by: The diameter of the cylindrical fixed base is 30 cm, the height is 30 cm, and the thickness is 3 mm. The connection point of the water level control unit is located 10 cm away from the top of the cylindrical fixed base.

4. The greenhouse gas collection device for the land-water transition in-situ ecosystem based on water level control according to claim 1 is characterized by: The water level control unit comprises a transparent cylindrical water level gauge, a third valve, a pumping device and a water storage cylinder.

5. The greenhouse gas collection device for in-situ ecosystem of water-land transition based on water level control according to claim 1 is characterized by: The transparent cylindrical water level gauge is a transparent cylindrical structure with scales and is equipped with a water level control sensor. One side of the bottom end is connected to the cylindrical fixed base and fixed to the right side of the cylindrical fixed base, and the other side is connected to the pumping equipment. The upper end has a detachable sealing ring.

6. The greenhouse gas collection device for the land-water transition in-situ ecosystem based on water level control according to claim 1 is characterized by: The transparent cylindrical water level gauge has a diameter of 2 cm and a height of 150 cm.

7. The greenhouse gas collection device for in-situ ecosystem of water-land transition based on water level control according to claim 1 is characterized by: One end of the pumping device is connected to a transparent cylindrical water level gauge and is equipped with a third valve, and the other end is connected to a water storage cylinder and is connected to a second power supply on the water storage cylinder through a second wire.

8. The greenhouse gas collection device for in-situ ecosystem of water-land transition based on water level control according to claim 1 is characterized by: The specification of the pumping equipment is 10cm*10cm*10cm, and a water outlet and a water inlet are respectively arranged at both ends and connected to a transparent cylindrical water level gauge and a water storage cylinder.

9. The greenhouse gas collection device for in-situ ecosystem of water-land transition based on water level control according to claim 1 is characterized by: The third valve includes a processing unit for controlling the opening and closing of the valve, the processing unit is a digital signal processor, an application-specific integrated circuit ASIC or a field programmable gate array FPGA, the processing unit includes a memory and a timer, the memory may include one or more read-only memories ROM, random access memories RAM, flash memories or electronically erasable programmable read-only memories EEPROM.

10. The greenhouse gas collection device for in-situ ecosystem of water-land transition based on water level control according to claim 1 is characterized by: The water storage cylinder is a cylindrical structure, and the left side is connected to the pumping equipment.

11. The greenhouse gas collection device for in-situ ecosystem of water-land transition based on water level control according to claim 1 is characterized by: The diameter of the water storage cylinder is 30 cm, the height is 100 cm and the thickness is 3 mm.

12. The greenhouse gas collection device for the land-water transition in-situ ecosystem based on water level control according to claim 1 is characterized by: The first cylindrical interface and the second cylindrical interface are cylindrical structures, and rubber rings are provided on the inner walls thereof to ensure air tightness.

13. The greenhouse gas collection device for in-situ ecosystem of water-land transition based on water level control according to claim 1 is characterized by: The first cylindrical interface and the second cylindrical interface have a diameter of 30.6 cm, a height of 20 cm, and a thickness of 3 mm.

14. The greenhouse gas collection device for in-situ ecosystem of water-land transition based on water level control according to claim 1 is characterized by: The cylindrical top cover has a diameter of 30 cm, a height of 20 cm and a thickness of 3 mm.

15. The greenhouse gas collection device for in-situ ecosystem of water-land transition based on water level control according to claim 1, characterized in that: The diameter of the cylindrical box is 30 cm and the thickness is 3 mm. The height can be set to different specifications of 10 cm, 30 cm, 50 cm, 80 cm, 100 cm, and 150 cm according to the actual height of the vegetation above the ground and the target water level.

16. The greenhouse gas collection device for in-situ ecosystem of water-land transition based on water level control according to claim 1, characterized in that: The gas collection unit includes a processing unit for controlling a first valve and a second valve.

17. The greenhouse gas collection device for in-situ ecosystem of water-land transition based on water level control according to claim 1 is characterized by: The temperature measuring unit is connected to the first sealing port via a silicone seal, and the temperature measuring unit includes an automatic recording thermometer.

18. The greenhouse gas collection device for in-situ ecosystem of water-land transition based on water level control according to claim 1 is characterized by: The first wire is connected to the third sealing port via a silicone seal, and the first power source and the second power source include batteries.

19. The greenhouse gas collection device for in-situ ecosystem of water-land transition based on water level control according to claim 1 is characterized by: The first valve and the second valve are three-way valves.

20. The greenhouse gas collection device for in-situ ecosystem of water-land transition based on water level control according to claim 1, characterized in that: The predetermined volume of the gas sampling syringe is 60 ml.

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