Wetland gas flux auxiliary detection device

Abstract

The utility model relates to a wetland gas flux auxiliary detection device which structurally comprises a transparent cylindrical measuring ring, a supporting and stabilizing device is arranged at the bottom of the measuring ring, a transparent gas collecting chamber is arranged at the top of the measuring ring, and the gas collecting chamber is used for being communicated with a gas analyzer through a guide pipe; the supporting and stabilizing device comprises a fixing ring, inserting rods and side supporting legs, the fixing ring is connected to the outer wall of the measuring ring in a sleeving mode, the inserting rods and the side supporting legs are arranged in the circumferential direction of the fixing ring, the upper ends of the inserting rods are connected with the fixing ring, the inserting rods extend downwards in the axial direction of the fixing ring, and the upper ends of the side supporting legs are connected with the fixing ring. The whole side supporting legs incline towards the outer side and the lower portion of the fixing ring, and the lower ends of the inserting rods are lower than the lower ends of the side supporting legs. The gas analyzer is simple in structure, convenient to use and capable of effectively avoiding shading of the gas analyzer and guaranteeing stable placement of the measuring ring, so that accurate measurement of gas flux is guaranteed.

Description

Technical Field

[0001] The utility model relates to a gas measurement technology, in particular to a wetland gas flux auxiliary detection device. Background Art

[0002] Wetlands are the transition zone between land and water. Wetland ecosystems are a special transitional ecosystem between terrestrial ecosystems and aquatic ecosystems. Therefore, they have rich resources such as plants, soil, water, atmosphere, aquatic microorganisms and plankton of both terrestrial and aquatic ecosystems. They have diverse functions and play an irreplaceable role in both humans and the natural environment.

[0003] The organic carbon pool stored in wetland ecosystems accounts for 20%-30% of the total surface carbon pool in terrestrial ecosystems, and the carbon storage per unit area is three times that of forests. Understanding the CO2 and CH4 gas fluxes of wetland ecosystem components, including plants, soil, water, atmosphere, aquatic microorganisms, and plankton, is particularly important for monitoring wetland carbon sources and sinks.

[0004] Gas fluxes in wetland ecosystems are composed of multiple components (including sediment components (microbial respiration in sediment), root components (plant root respiration in sediment), plant components (submerged plant respiration), aquatic microbial components (microbial respiration in water), and aquatic plankton components (plankton and zooplankton respiration in water). These components, such as plants, soil, water, atmosphere, aquatic microorganisms, and plankton, are not isolated entities; they are all interconnected and interact with each other. Therefore, it is necessary to measure the CO2 and CH4 fluxes of specific components of wetland ecosystems, such as plants, soil, water, atmosphere, aquatic microorganisms, and plankton.

[0005] In order to measure the flux of CO2 and CH4 of each component, a set of cylindrical measuring rings of different lengths are required. The top of the measuring ring is generally slightly exposed above the water surface and is equipped with a gas analyzer. The bottom of the measuring ring is set on the sediment surface or inserted into the sediment to a certain depth as needed.

[0006] Therefore, when the lower end of the measurement ring is placed on the sediment surface or inserted shallowly into the sediment, the loose sediment prevents the ring from being stably placed and may shift or tip over. When a gas analyzer is placed on the measurement ring for measurement, its own weight significantly disturbs the loose sediment at the bottom of the ring, releasing large amounts of gas from the sediment and affecting accurate gas flux measurements. Furthermore, the gas analyzer, positioned at the top of the measurement ring, blocks sunlight and can easily fall into the water, disrupting plant photosynthesis and potentially damaging the instrument. Utility Model Content

[0007] The purpose of this utility model is to provide a wetland gas flux auxiliary detection device to solve the problems that the measuring ring cannot be placed stably when measuring the gas flux of each component in the wetland ecosystem, the gas flux cannot be accurately measured, and the gas analyzer is easily damaged by falling into water.

[0008] The utility model is implemented as follows: a wetland gas flux auxiliary detection device, comprising a cylindrical measuring ring, a supporting and stabilizing device is provided at the bottom of the measuring ring, and a gas collecting chamber is provided at the top of the measuring ring, and the gas collecting chamber is used to communicate with the gas analyzer through a conduit; the supporting and stabilizing device comprises a fixed ring, a plug-in rod and a side support leg, the fixed ring is sleeved on the outer wall of the measuring ring, and a plurality of plug-in rods and a plurality of side support legs are provided along the circumferential direction of the fixed ring, the upper end of the plug-in rod is connected to the fixed ring, the plug-in rod extends downward along the axial direction of the fixed ring, the upper end of the side support leg is connected to the fixed ring, the side support leg is tilted toward the outside and downward of the fixed ring as a whole, and the lower end of the plug-in rod is lower than the lower end of the side support leg.

[0009] As a further improvement of the wetland gas flux auxiliary detection device of the present invention, a support plate is provided at the lower end of the side leg.

[0010] As a further improvement of the wetland gas flux auxiliary detection device of the present invention, there are three of the connecting rods and three of the side legs, and they are evenly distributed along the circumferential direction of the fixing ring.

[0011] As a further improvement of the wetland gas flux auxiliary detection device of the present invention, the length of the connecting rod is at least twice the height of the side legs.

[0012] As a further improvement of the wetland gas flux auxiliary detection device of the present invention, the gas collection chamber is a transparent structure.

[0013] As a further improvement of the wetland gas flux auxiliary detection device of the utility model, the gas collection chamber includes a collection ring, a top plate is sealed at the top of the collection ring, a plug-in ring is provided at the lower part of the collection ring, the plug-in ring is used to be plugged into the top of the measuring ring, a sealing ring is provided at the lower end of the collection ring, the sealing ring is used to be in sealing contact with the top of the measuring ring, and two connecting ports are opened at the upper part of the collection ring, and the connecting ports are used to connect the catheter.

[0014] As a further improvement of the wetland gas flux auxiliary detection device of the present invention, a sealing gasket is provided on the lower surface of the sealing ring.

[0015] As a further improvement of the wetland gas flux auxiliary detection device of the present invention, a handle extending upward is provided on the top plate.

[0016] As a further improvement of the wetland gas flux auxiliary detection device of the present invention, a float is provided on the gas collection chamber.

[0017] The lower end of the measuring ring of the utility model is placed in the fixed ring of the supporting and stabilizing device, the plug-in rod of the supporting and stabilizing device is inserted into the bottom mud, and the fixing ring is supported by the supporting legs. The fixing ring can be stably fixed by the plug-in rod and the supporting legs, so that the measuring ring is supported by the supporting and stabilizing device, so that the measuring ring can be stably placed on the bottom mud without moving or tipping over.

[0018] The top of the measurement ring is not directly connected to the gas analyzer. Instead, a transparent gas collection chamber is installed. This seals the top of the measurement ring and connects the gas collection chamber to the gas analyzer via a gas duct. This allows the gas analyzer to be placed in a water-free location, such as on a shore. This effectively prevents the gas analyzer from being blocked by light and its own weight from disturbing the loose bottom mud at the bottom of the measurement ring, potentially causing the instrument to fall into the water. When measurements are required, the gas collection chamber, which is connected to the gas analyzer, is installed on the top of the measurement ring.

[0019] A float is provided on the gas collection chamber to prevent the gas collection chamber from falling into water in an accidental situation.

[0020] The utility model has a simple structure and is easy to use, can effectively ensure the stable placement of the measuring ring, avoids the gas analyzer from being blocked by light and disturbing the loose bottom mud at the bottom of the measuring ring by its own weight, and thus ensures the accurate measurement of the gas flux. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a reference diagram for the use of the measuring ring of the utility model when it is placed on the bottom mud surface.

[0022] Figure 2 It is a top view of the supporting and stabilizing device of the utility model.

[0023] Figure 3 It is a structural diagram of the gas collection chamber of the utility model.

[0024] In the figure: 1. Measuring ring; 2. Support and stabilizing device; 3. Gas collecting chamber; 2-1. Fixing ring; 2-2. Plug-in rod; 2-3. Side support leg; 2-4. Support plate; 3-1. Collecting ring; 3-2. Top plate; 3-3. Sealing ring; 3-4. Connecting port; 3-5. Handle; 3-6. Float; 3-7. Plug-in ring; 3-8. Sealing gasket. DETAILED DESCRIPTION

[0025] The specific structure of the present utility model will be described below with reference to the accompanying drawings.

[0026] like Figure 1As shown, the wetland gas flux auxiliary detection device of the present invention comprises a measuring ring 1, a supporting and stabilizing device 2 and a gas collecting chamber 3.

[0027] The measuring ring 1 is a cylindrical structure with a certain height, and its specific height is determined according to needs. The measuring ring 1 is made of transparent material. Figure 1 In the example, the bottom of the measuring ring is in contact with the bottom mud surface, while the top of the ring is slightly above the water surface. The measuring ring 1 is open at both ends. A support and stabilization device 2 is provided at the bottom of the measuring ring 1 to support the measuring ring 1. A gas collection chamber 3 is provided at the top of the measuring ring 1 to seal the top of the measuring ring 1. Furthermore, the gas collection chamber 3 can be connected to a gas analyzer via a conduit, allowing the gas analyzer to measure the gas flux within the measuring ring 1.

[0028] Holes for water circulation can be opened on the side wall of the measuring ring 1 as needed, and the side wall holes can be sealed using a plankton net as needed.

[0029] like Figure 1 、 Figure 2 As shown, the supporting and stabilizing device 2 specifically includes a fixing ring 2-1, a plug-in rod 2-2 and a side support leg 2-3.

[0030] The fixing ring 2-1 is a ring-shaped structure, and the inner diameter of the fixing ring 2-1 is slightly larger than the outer diameter of the measuring ring 1, so that the fixing ring 2-1 can be sleeved on the measuring ring 1. At the same time, the fixing ring 2-1 has a certain height, so that there is a larger contact area between the fixing ring 2-1 and the measuring ring 1, ensuring that the fixing ring 2-1 effectively supports the measuring ring 1.

[0031] The connecting rod 2-2 is a long straight rod. The length direction of the connecting rod 2-2 is consistent with the axis direction of the fixing ring 2-1. The upper end of the connecting rod 2-2 is connected to the fixing ring 2-1 and the connecting rod 2-2 extends downward along the axial direction of the fixing ring 2-1. The upper end of the connecting rod 2-2 can be fixed to the outer surface of the fixing ring 2-1 by welding.

[0032] The plug rod 2-2 is used to be inserted into the bottom mud to prevent the movement of the fixing ring 2-1. In order to facilitate operation, the lower end of the plug rod 2-2 can be designed as a pointed structure.

[0033] There is at least one plug-in rod 2-2. In order to increase the firmness, a plurality of plug-in rods 2-2 are generally provided. The plurality of plug-in rods 2-2 are evenly distributed along the circumferential direction of the fixing ring 2-1.

[0034] The side legs 2-3 are tilted rods, the upper ends of which are connected to the fixing ring 2-1. The side legs 2-3 are tilted toward the outside and below the fixing ring 2-1. When the lower ends of the side legs 2-3 contact the bottom mud surface, the fixing ring 2-1 is at a certain distance from the bottom mud surface. The upper ends of the side legs 2-3 can be fixed to the outer surface of the fixing ring 2-1 by welding.

[0035] There are generally at least three side legs 2-3, and the three side legs 2-3 are evenly distributed along the circumferential direction of the fixing ring 2-1. The support of the three side legs 2-3 can effectively prevent the fixing ring 2-1 from tilting, thereby preventing the measuring ring 1 from tilting.

[0036] In order to increase the stability of the support of the side legs 2-3, a horizontal support plate 2-4 is provided at the lower end of the side legs 2-3, and the contact area between the side legs 2-3 and the bottom mud surface is increased by the support plate 2-4.

[0037] Among them, the lower end of the connecting rod 2-2 is lower than the lower end of the side support leg 2-3, so that when the lower end of the side support leg 2-3 contacts the bottom mud surface, a certain length of the connecting rod 2-2 is inserted into the bottom mud.

[0038] Specifically, the length of the connecting rod 2-2 is at least twice the height of the side leg 2-3, so that the length of the connecting rod 2-2 inserted into the bottom mud is greater than or equal to the height of the side leg 2-3, ensuring the firmness of the connection between the connecting rod 2-2 and the bottom mud.

[0039] The utility model effectively supports and fixes the fixed ring 2-1 through the connecting rod 2-2 and the side legs 2-3, thereby supporting and fixing the measuring ring 1 inside the fixed ring 2-1. The connecting rod 2-2 inserted in the bottom mud can effectively prevent the measuring ring 1 from moving. At the same time, the connecting rod 2-2 and the side legs 2-3 can prevent the measuring ring 1 from tilting or falling.

[0040] Among them, the specific number of the connecting rods 2-2 can be the same as the number of the side legs 2-3, which is three. The connecting rods 2-2 and the side legs 2-3 can be arranged alternately or corresponding to each other. When the connecting rods 2-2 and the side legs 2-3 correspond to each other, the upper end of the connecting rod 2-2 is welded and fixed to the outer surface of the fixing ring 2-1, and the upper end of the side legs 2-3 is welded and fixed to the side wall of the connecting rod 2-2.

[0041] Gas collection chamber 3 is a transparent structure. When placed on top of measurement ring 1, it does not block sunlight, which helps ensure the accuracy of gas flux measurements during photosynthesis within the measurement ring. Traditionally, placing a gas analyzer directly on top of measurement ring 1 would block sunlight from reaching the measurement ring, thus affecting measurement accuracy.

[0042] like Figure 3 As shown, the gas collection chamber 3 includes a collection ring 3-1, and a top plate 3-2 is sealed on the top of the collection ring 3-1, so that the gas collection chamber 3 forms a cover structure with an open lower end. The lower end of the gas collection chamber 3 is provided with a plug-in ring 3-7. The diameter of the collection ring 3-1 is consistent with the diameter of the measuring ring 1, and the outer diameter of the plug-in ring 3-7 is consistent with the inner diameter of the measuring ring 1. The plug-in ring 3-7 is plugged into the top of the measuring ring 1. A sealing ring 3-3 is provided at the lower end of the collection ring 3-1. When the plug-in ring 3-7 is plugged into the measuring ring 1, the lower surface of the sealing ring 3-3 contacts the top surface of the measuring ring 1, thereby ensuring the sealing between the gas collection chamber 3 and the measuring ring 1. The collection ring 3-1, top plate 3-2, plug-in ring 3-7 and sealing ring 3-3 are all made of transparent material.

[0043] Furthermore, a sealing gasket 3-8 is provided on the lower surface of the sealing ring 3-3. The material of the sealing gasket 3-8 is EVA soft foam. The sealing gasket 3-8 further ensures the sealing between the gas collection chamber 3 and the measuring ring 1.

[0044] In order to enable the gas collection chamber 3 to communicate with the gas analyzer through a conduit, two connecting ports 3-4 are opened on the upper side wall of the collection ring 3-1, and the ends of the conduits can be installed on the connecting ports 3-4.

[0045] One of the two connecting ports 3-4 of the gas collection chamber 3 is an air inlet and the other is an air outlet, which are connected to the air outlet and air inlet of the gas analyzer through conduits respectively. The gas in the gas collection chamber 3 can be analyzed by the gas analyzer.

[0046] Because the top of the measurement ring 1 is not directly connected to the gas analyzer, but is instead provided with a gas collection chamber 3, which seals the top of the measurement ring 1. The gas collection chamber 3 and the gas analyzer are connected via an air duct. This allows the gas analyzer to be placed in a waterless location, such as a shore. This effectively prevents the gas analyzer from disturbing the loose bottom mud at the bottom of the measurement ring 1 or falling into the water during placement. When measurements are required, the gas collection chamber 3, which is connected to the gas analyzer, is simply installed on the top of the measurement ring 1.

[0047] In order to facilitate the installation and removal of the gas collection chamber 3, an upwardly extending handle 3-5 is provided on the top plate 3-2, and the operator can move the gas collection chamber 3 and place and collect the gas collection chamber 3 through the handle 3-5.

[0048] Furthermore, a float 3-6 is provided on the gas collection chamber 3 to prevent the gas collection chamber 3 from falling into the water in an accident. The float 3-6 can be a plate-like structure made of a material with a low density such as plastic foam.

[0049] The utility model has a simple structure and is easy to use, and can effectively ensure the stable placement of the measuring ring 1, avoiding the gas analyzer's light shielding and self-generated weight from disturbing the loose bottom mud at the bottom of the measuring ring, thereby ensuring accurate measurement of the gas flux.

Claims

1. A wetland gas flux auxiliary detection device, comprising a cylindrical measuring ring, characterized in that: A supporting and stabilizing device is provided at the bottom of the measuring ring, and a gas collecting chamber is provided at the top of the measuring ring, and the gas collecting chamber is used to communicate with the gas analyzer through a conduit; the supporting and stabilizing device includes a fixed ring, a plug-in rod and a side support leg, and the fixed ring is sleeved on the outer wall of the measuring ring, and a plurality of plug-in rods and a plurality of side support legs are provided along the circumferential direction of the fixed ring, the upper end of the plug-in rod is connected to the fixed ring, and the plug-in rod extends downward along the axial direction of the fixed ring, the upper end of the side support leg is connected to the fixed ring, and the side support leg is inclined toward the outside and downward of the fixed ring as a whole, and the lower end of the plug-in rod is lower than the lower end of the side support leg.

2. The wetland gas flux auxiliary detection device according to claim 1, characterized in that: A support plate is provided at the lower end of the side support leg.

3. The wetland gas flux auxiliary detection device according to claim 1, characterized in that: There are three connecting rods and three side legs respectively, and they are evenly distributed along the circumference of the fixing ring.

4. The wetland gas flux auxiliary detection device according to claim 1, characterized in that: The length of the splice rod is at least twice the height of the side legs.

5. The wetland gas flux auxiliary detection device according to claim 1, characterized in that: The gas collecting chamber is a transparent structure.

6. The wetland gas flux auxiliary detection device according to claim 1, characterized in that: The gas collection chamber includes a collection ring, a top plate is sealed on the top of the collection ring, a plug-in ring is provided at the lower part of the collection ring, the plug-in ring is used to be plugged into the top of the measuring ring, a sealing ring is provided at the lower end of the collection ring, the sealing ring is used to be in sealing contact with the top of the measuring ring, and two connecting ports are opened on the upper part of the collection ring, and the connecting ports are used to connect the catheter.

7. The wetland gas flux auxiliary detection device according to claim 6, characterized in that: A sealing gasket is provided on the lower surface of the sealing ring.

8. The wetland gas flux auxiliary detection device according to claim 6, characterized in that: A handle extending upward is provided on the top plate.

9. The wetland gas flux auxiliary detection device according to claim 6, characterized in that: A float is provided on the gas collection chamber.

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