Greenhouse gas sampling detector

Abstract

The utility model relates to the technical field of gas detection, and discloses a greenhouse gas sampling detector which comprises a first shell, a second shell, a placing groove, a sealing cover and a gas detector, the bottom of the first shell is open, the top of the first shell is provided with an opening, the top of the second shell is open, and the placing groove is arranged in the opening. The top of the second shell is detachably connected with the bottom of the first shell in a sealed mode, the sample containing plate is located in the second shell, a groove opening of the containing groove is connected with an opening of the first shell so that the interior of the first shell can be communicated with the containing groove, a through hole is formed in one end of the containing groove, and the sealing cover is in threaded connection with the through hole of the containing groove. The gas detector is located in the placing groove, and a power line and a signal cable of the gas detector penetrate through the sealing cover to be connected with the gas detector host. The detector does not need to independently collect gas generated by a soil sample, so that the detection process is simple and convenient, real-time detection can be realized, and the gas detection accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of material detection, and particularly relates to a greenhouse gas sampling detector. Background Art

[0002] Greenhouse gas emissions are one of the main driving forces of current global climate change. Among them, the agricultural production system is an important greenhouse gas emission source, especially carbon dioxide generated in the soil. Accurately measuring and monitoring carbon dioxide gas emissions is crucial for assessing the environmental impact of the agricultural production system, formulating emission reduction strategies, and promoting sustainable agricultural practices.

[0003] The existing detection of greenhouse gases usually involves extracting and sealing the gases generated by the soil, and then detecting the extracted gases. This makes the detection process complex, and it can only detect the greenhouse gases generated by the soil during the sampling period, without real-time detection, which may lead to errors in the detection results. For example, the Chinese patent with the patent number CN218567016U discloses a gas detection sampling device, which mainly includes a sampling cylinder. When detection is required, first take a soil sample, collect the gas generated by the soil sample into the sampling cylinder, then seal the sampling cylinder, and finally detect the sealed gas. This process is cumbersome and can only detect the gas generated by the soil sample during the period when the gas is collected into the sampling cylinder, without real-time detection, thus possibly leading to errors in the detection results. Content of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a greenhouse gas sampling detector, which can simplify the detection process and enable real-time detection, improving the accuracy of the detection results.

[0005] The utility model provides a greenhouse gas sampling detector, including: a first housing, a second housing, a placement groove, a sealing cover, and a gas detector. The bottom of the first housing is open, and an opening is provided at the top of the first housing. The top of the second housing is open, and the top of the second housing is detachably and sealingly connected to the bottom of the first housing. A sample placement plate is located inside the second housing. The opening of the placement groove is connected to the opening of the first housing, so that the inside of the first housing is communicated with the placement groove. A through hole is provided at one end of the placement groove, and the sealing cover is threadedly connected to the through hole of the placement groove. The gas detector is located in the placement groove, and the power cord and signal cable of the gas detector pass through the sealing cover and are connected to the gas detector host.

[0006] Optionally, a soft rubber plug is connected between the placement groove and the sealing cover to seal between the sealing cover and the placement groove.

[0007] Optionally, a sealing groove is provided on the second housing, and the first housing is embedded in the sealing groove and sealed with sealing oil.

[0008] Optionally, two sampling holes are provided on the side of the first housing, and the two sampling holes are on the same horizontal line.

[0009] Optionally, an exhaust hole is provided on the side of the first housing, and the exhaust hole is between the two sampling holes.

[0010] Optionally, the width of the bottom of the first housing is greater than the width of the top of the first housing.

[0011] Optionally, the length of the opening is less than the length of the gas detector.

[0012] Optionally, the second housing is a rectangular housing.

[0013] The technical solution provided by the embodiment of the present utility model has the following advantages compared with the prior art:

[0014] A greenhouse gas sampling and detection instrument provided by an embodiment of the present utility model is specifically used for detecting the greenhouse gas emissions of soil indoors, and includes: a first housing, a second housing, a placement groove, a sealing cover, and a gas detector. The bottom of the first housing is open, an opening is provided at the top of the first housing, the top of the second housing is open, the top of the second housing is detachably and sealingly connected to the bottom of the first housing, a sample placing plate is located inside the second housing and is connected to the opening of the first housing so that the inside of the first housing is communicated with the placement groove. A through hole is provided at one end of the placement groove, the sealing cover is threadedly connected to the through hole of the placement groove, the gas detector is located in the placement groove, and the power cord and signal cable of the gas detector pass through the sealing cover and are connected to the gas detector main body. When detection is required, take a soil sample, place it on a culture dish, place the culture dish on the sample placing plate at the bottom of the second housing, and then detachably and sealingly connect the first housing and the second housing. Because a placement groove is connected to one end of the first housing away from the second housing, the placement groove is communicated with the first housing, and the gas detector is located in the placement groove, and the whole device is sealed, so the gas generated by the soil on the culture dish goes from the second housing to the first housing and finally reaches the placement groove to contact the gas detector, and the gas detector detects the gas generated by the soil. This process does not require separate collection of the gas generated by the soil sample, making the detection process simple and convenient, and capable of real-time detection, improving the accuracy of gas detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a greenhouse gas sampling and detection instrument provided by an embodiment of the present utility model;

[0016] Figure 2 is a schematic structural diagram of the second housing in an embodiment of the present utility model;

[0017] Figure 3 is a schematic connection structure diagram of the gas detector and the gas detector sealing cover in an embodiment of the present utility model.

[0018] Description of the reference numerals:

[0019] 1. First housing; 2. Second housing; 3. Sampling hole; 4. Exhaust hole; 5. Gas detector; 101. Placing groove; 102. Sealing cover; 201. Sealing groove. Detailed implementation manners

[0020] The following combines with the drawings to describe in detail a specific implementation manner of the present utility model. However, it should be understood that the protection scope of the present utility model is not limited by the specific implementation manner.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the technical solutions of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0023] In addition, in the description of the present utility model, "a plurality of" means two or more than two. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as implying or indicating relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0024] The following illustrates the present utility model through several specific embodiments. In order to keep the description clear and concise for the following embodiments of the present utility model, the detailed description of known functions and known components can be omitted. When any component of the embodiments of the present utility model appears in more than one drawing, the component can be represented by the same reference numeral in each drawing.

[0025] Refer to Figures 1 to 3 , Figure 1This is a schematic diagram of the structure of a greenhouse gas sampling and detection instrument provided by an embodiment of the utility model. Figure 2 This is a schematic structural diagram of the second housing in an embodiment of the present utility model. Figure 3 Schematic diagram of the connection structure between the gas detector and the gas detector sealing cover in the embodiment of the present utility model. Figures 1 to 3 As shown, a greenhouse gas sampling and detection instrument includes: a first shell 1, a second shell 2, a placement groove 101, a sealing cover 102 and a gas detector 5. The bottom of the first shell 1 is open, the top of the first shell 1 is provided with an opening, the top of the second shell 2 is open, the top of the second shell 2 is detachably sealed and connected to the first shell 1, the bottom of the second shell 2 is connected to a sample holding plate, the sample holding plate is used to place a culture dish of the soil to be tested, the notch of the placement groove 101 is connected to the opening of the first shell 2, so that the interior of the first shell 1 is connected to the placement groove 101, one end of the placement groove 101 is provided with a through hole, the sealing cover 102 is threadedly connected to the through hole of the placement groove 101, the gas detector 5 is located in the placement groove 101, and the power cord and signal cable of the gas detector 5 are connected to the gas detector 5 host through the sealing cover 102.

[0026] Take a soil sample, place it on a culture dish, place the culture dish on the sample holding plate at the bottom of the second shell 2, and then removably seal the first shell 1 and the second shell 2. Because the end of the first shell 1 away from the second shell 2 is connected to the placement groove 101, the placement groove 101 is connected to the first shell 1, and the gas detector 5 is located in the placement groove 101. The entire device is sealed, so the gas generated by the soil on the culture dish flows from the second shell 2 to the first shell 1, and finally reaches the placement groove 101 and contacts the gas detector 5. The gas detector 5 detects the gas generated by the soil. The power cord and signal cable of the gas detector 5 pass through the sealing cover 102 and are connected to the gas detector 5 host. The gas detector 5 can be replaced according to the experimental needs. The gas detector 5 is a prior art and is very mature and will not be described in detail here. This process does not require the separate collection of gases generated by soil samples, making the detection process simple and convenient. It can also detect in real time, improve the accuracy of gas detection, and also improve detection efficiency. Different numbers of greenhouse gas sampling detectors can be configured according to experimental requirements. It can monitor both conventional soil cultivation experiments and soil treatment experiments. Different gas detectors can be configured according to experimental requirements to achieve simultaneous monitoring of different gas components. Gas sampling can also be carried out during monitoring, providing the possibility of data traceability.

[0027] Refer again Figure 2, a sealing groove 201 is formed in the second housing 2, the first housing 1 is inserted into the sealing groove 201, and sealing oil is added into the sealing groove 201 to achieve sealing. By providing the sealing groove 201 and adding sealing oil in the groove for sealing, it not only has a good sealing effect but also makes the disassembly process simple.

[0028] Refer again to Figure 1 , the width of the bottom of the first housing 1 is greater than the width of the top of the first housing 1. This makes the connection between the first housing 1 and the placement groove 101 more stable and natural. The overall size of the device can be made 20*30*20 cm, or the volume can be adjusted according to experimental needs. This embodiment does not make specific limitations. A culture dish for holding soil samples can be placed on the sample placement plate inside the housing. Generally, each soil sample takes 5 - 20 g for indoor cultivation. Without the need for a large instrument volume, it can meet the experimental requirements.

[0029] Refer again to Figure 2 , the second housing 2 is a rectangular housing, and the rectangular housing makes the processing process easier and can reduce costs.

[0030] Refer again to Figure 1 , two sampling holes 3 are formed on the side of the first housing 1, and the two sampling holes 3 are on the same horizontal line. By providing the two sampling holes 3, when it is necessary to analyze the changes in more gas concentrations, an external open - type gas analyzer can be connected through these two sampling holes 3. The external analyzer takes gas from one sampling hole 3 and discharges the gas from the other sampling hole 3 after analysis. The two sampling holes 3 being on the same horizontal line makes it more convenient to connect the external open - type gas analyzer and can reduce the possibility of mutual influence during the gas sampling and exhaust processes of the external open - type gas analyzer. The two sampling holes 3 are in a closed state when not connected to the external open - type gas analyzer.

[0031] Refer again to Figure 1 , an exhaust hole 4 is formed on the side of the first housing 1, and the exhaust hole 4 is between the two sampling holes 3. After the detection is completed, the internal gas can be discharged from the exhaust hole 4.

[0032] The length of the opening is less than the length of the gas detector 5. This prevents the gas detector 5 from falling out of the opening. A soft rubber plug is connected between the placement groove 101 and the sealing cover 102 to seal between the sealing cover 102 and the placement groove 101, further improving the sealing effect.

[0033] The above - disclosed are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A greenhouse gas sampling detector, characterized in that, Comprising: A first housing (1) with an open bottom, and an opening is provided at the top of the first housing (1). A second housing (2) with an open top, the top of the second housing (2) is detachably and sealingly connected to the bottom of the first housing (1), and a sample holding plate is connected to the bottom of the second housing (2), and the sample holding plate is located inside the second housing (2). A placement groove (101) whose notch is connected to the opening of the first housing (1) so that the inside of the first housing (1) communicates with the placement groove (101), and a through hole is provided at one end of the placement groove (101). A sealing cover (102) is threadedly connected to the through hole of the placement groove (101). A gas detector (5) is located in the placement groove (101), and the power cord and signal cable of the gas detector (5) pass through the sealing cover (102) and are connected to the gas detector main unit.

2. The greenhouse gas sampling detector according to claim 1, wherein A soft rubber plug is connected between the placement groove (101) and the sealing cover (102) to seal between the sealing cover (102) and the placement groove (101).

3. The greenhouse gas sampling detector according to claim 1, characterized in that, The second housing (2) is provided with a sealing groove (201), and the first housing (1) is embedded in the sealing groove (201) and sealed with sealing oil.

4. The greenhouse gas sampling detector according to claim 1, wherein Two sampling holes (3) are provided on the side of the first housing (1), and the two sampling holes (3) are on the same horizontal line.

5. The greenhouse gas sampling detector according to claim 4, wherein An exhaust hole (4) is provided on the side of the first housing (1), and the exhaust hole (4) is located between the two sampling holes (3).

6. The greenhouse gas sampling detector according to claim 1, characterized in that, The width of the bottom of the first housing (1) is greater than the width of the top of the first housing (1).

7. The greenhouse gas sampling detector according to claim 1, characterized in that, The length of the opening is less than the length of the gas detector (5).

8. The greenhouse gas sampling detector according to claim 1, wherein, The second housing (2) is a rectangular housing.

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