A static penetration probe and method for integrated in-situ measurement of greenhouse gases

Abstract

The present invention relates to the field of penetration probes, and discloses a static penetration probe and method for integrated in-situ measurement of greenhouse gases, comprising a detection probe provided with a gas detector, a temperature detector, and a pore water pressure detection head. Before the detection probe is inserted into the soil, the fixing rod is in a folded state, and a closing cover covers the surface of the air window, which plays a protective role and prevents soil particles from entering the upper chamber during the insertion into the soil, thereby damaging the gas detector and the temperature detector. At the same time, this folded state makes the overall size of the detection probe smaller, which is convenient for insertion into the soil. When the detection probe is inserted to a predetermined depth, an electric push rod starts to work. Since the electric push rod is arranged in an inclined shape, its output shaft is connected to the fixing rod through a connecting piece. When the electric push rod is extended, it pushes the fixing rod to swing outward around the rotating axis. The straight surface of the lower part of the fixing rod close to the electric push rod is a force point, so that the fixing rod can be smoothly expanded outward.

Description

Technical Field

[0001] The present invention relates to the field of penetration probes, and in particular to a static penetration probe and method for integrating in-situ measurement of greenhouse gases. Background Art

[0002] Current research methods for tea garden soil GHG have limitations. For example, the static chamber method: It is mainly used to measure the GHG flux at the soil-atmosphere interface. Although it is widely used, it cannot provide information on the distribution of gas concentrations inside the soil with depth, and it is difficult to reveal the specific location and process of gas production, consumption and migration. It is also greatly affected by spatial heterogeneity, and the representativeness of single-point measurements is limited; or by collecting soil or gas samples at different depths and bringing them back to the laboratory for analysis such as gas chromatography. This method is time-consuming and labor-intensive, and it is difficult to achieve high-frequency and high-density monitoring; the sampling process is likely to cause disturbances to the soil structure and the in-situ gas environment; and it cannot be measured synchronously with the physical conditions of the soil. Although buried sensors can achieve continuous monitoring at fixed points, they are expensive and difficult to cover the wide spatial variability of tea gardens. In addition, the installation process causes significant disturbances to the soil, and profile information cannot be easily obtained.

[0003] At the same time, due to the unstable structure and density of the soil, the existing detection methods cannot guarantee that there is enough space around the detection equipment for the gas to flow effectively. Summary of the Invention

[0004] The present invention provides a static penetration probe and method for integrated in-situ measurement of greenhouse gases, which overcome the deficiencies described in the background art.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A static penetration probe for integrated in-situ greenhouse gas measurement includes a detection probe equipped with a gas detector, a temperature detector, and a pore water pressure probe. The detection probe is provided with an upper chamber and a lower chamber. The gas detector and the temperature detector are both located in the upper chamber, while the pore water pressure probe is located in the lower chamber. The pore water pressure probe is provided with a detection end at the end, which extends to the surface of the detection probe. The upper chamber is connected to the outside through an air window provided on the surface of the detection probe.

[0007] A fixing rod is provided on both sides of the detection probe near the air window. The two fixing rods are movably mounted on the detection probe through a rotating shaft, and the two fixing rods are respectively driven to swing by an electric push rod provided in the detection probe. A closing cover is provided on the side surface of the upper end of the fixing rod, and the closing cover covers the surface of the air window.

[0008] The two electric push rods are arranged in an inclined shape. The output shafts of the electric push rods are connected to the fixed rod through a shaft. A flat surface is provided on the side of the lower part of the fixed rod close to the electric push rod and is connected to the flat surface.

[0009] A preferred technical solution is that a fixing ring is provided on one side of the closing cover near the air window, the closing cover is connected to the fixing ring via a rubber connecting ring, the fixing ring is fixed to the surface of the detection probe, and the closing cover is connected to the air window. An opening is provided at the lower end of the closing cover, and a channel for gas flow is formed between the air window and the opening, and soil gas flows into the detection probe through the channel;

[0010] When the fixing rod is driven by the electric push rod to swing outward, the closing cover moves outward accordingly and maintains continuous connection with the fixing ring through the rubber connecting ring, and the fixing ring is continuously fixed to the surface of the detection probe.

[0011] A preferred technical solution is that an embedding groove is provided on the surface of the detection probe, the fixing rod is installed in the embedding groove, and there is a gap between the fixing rod and the embedding groove.

[0012] A preferred technical solution is that a mounting ring and a filter are provided in the air window, the mounting ring is arranged on the outside of the filter, a rubber support layer is provided in the mounting ring, and there is a gap between the rubber support layer and the outer port of the air window and the filter, and the inner diameter of the mounting ring gradually decreases from one end close to the inner side of the detection probe to the other end;

[0013] The rubber supporting layer is woven from a plurality of elastic ropes, and the elastic ropes are woven in a cross-staggered shape.

[0014] A preferred technical solution, the filter element includes a filter cotton layer and a support block, the support block is arranged in an annular array, the support block is arranged on the side of the filter cotton layer away from the mounting ring, and a cotton layer support member is provided between the support block and the filter cotton layer, the cotton layer support member is an annular structure, the cotton layer support member extends along the edge of the filter cotton layer, and the surface of the cotton layer support member is provided with a support layer extending toward the middle of the cotton layer support member, a gap is provided between the support layers for gas flow, and the support layer is abutted against the surface of the filter cotton layer;

[0015] One end of the support block away from the support layer is bent inward.

[0016] In a preferred technical solution, the support layer includes support bars arranged in a rotating array and inner and outer support rings, the inner support ring is connected to the outer support ring through the support bars, the outer support ring abuts against the edge of the filter cotton layer, and the inner support ring is arranged near the middle of the filter cotton layer;

[0017] The middle portion of the support bar is bent toward a side away from the filter cotton layer, and every two adjacent support bars support and form the gap.

[0018] A method for using a static penetration probe integrated with in-situ greenhouse gas measurement, applicable to the static penetration probe integrated with in-situ greenhouse gas measurement, characterized in that, during use, the detection probe is inserted into the soil, and air windows provided on the side of the detection probe are used to allow air in the soil surrounding the detection probe to flow into the detection probe, the inflowing air is detected by a gas detector, the soil temperature surrounding the detection probe is detected by a temperature detector, and the pore water pressure when the detection probe is inserted into the soil is detected by a pore water pressure probe;

[0019] Among them, after the detection probe is inserted into the soil, the electric push rod drives the fixing rod to swing outward, so that the fixing rod swings with the rotating shaft as the fulcrum, so that the upper end of the fixing rod extends out of the embedding groove and is inserted into the soil for fixation.

[0020] Compared with the existing technology, this technical solution has the following advantages:

[0021] Before the detection probe is inserted into the soil, the fixing rod is in a folded state. A closing cover covers the surface of the air window to protect it from soil particles entering the upper chamber during insertion into the soil, which could damage the gas detector and temperature detector. At the same time, this folded state reduces the overall size of the detection probe, making it easier to insert into the soil. Once the detection probe is inserted to a predetermined depth, the electric push rod begins to work. Because the electric push rod is tilted, its output shaft is connected to the fixing rod via a connector. As the electric push rod extends, it pushes the fixing rod to swing outward around the rotating axis. The flat surface on the lower side of the fixing rod, close to the electric push rod, serves as a force point, allowing the fixing rod to smoothly expand outward. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and examples.

[0023] Figure 1 This is an overall diagram of the present invention.

[0024] Figure 2 A partial three-dimensional schematic diagram of the detection probe.

[0025] Figure 3 It is a three-dimensional schematic diagram of the fixing rod, the embedding groove and the air window.

[0026] Figure 4 for Figure 3 Half-section diagram of .

[0027] Figure 5 for Figure 3 Schematic top view of .

[0028] Figure 6 Schematic diagram of the connection structure between the fixed rod and the electric push rod.

[0029] Figure 7 Schematic diagram of the structure of the closing cover.

[0030] Figure 8 It is a structural diagram of the mounting ring and filter element.

[0031] Figure 9 Schematic diagram of the structure of the mounting ring.

[0032] Figure 10 Schematic diagram of the filter structure.

[0033] Figure 11 for Figure 10 Schematic diagram of the decomposition.

[0034] In the figure: detection probe 1, gas detector 100, temperature detector 200, pore water pressure detection head 300, detection end 301;

[0035] Fixed rod 11, embedded slot 12, air window 13, electric push rod 14, connecting shaft 141;

[0036] Rotating shaft 111, closing cover 112, opening 1121, fixing ring 1122, rubber connecting ring 1123;

[0037] Mounting ring 131 , rubber support layer 1311 , filter element 132 , filter cotton layer 1321 , support block 1322 , cotton layer support element 1323 . DETAILED DESCRIPTION

[0038] like Figures 1 to 11 As shown, the present invention proposes a static penetration probe for integrated in-situ measurement of greenhouse gases, including a detection probe 1 provided with a gas detector 100, a temperature detector 200 and a pore water pressure probe 300. The detection probe 1 is provided with an upper and a lower chamber, the gas detector 100 and the temperature detector 200 are both provided in the upper chamber, and the pore water pressure probe 300 is provided in the lower chamber, and a detection end 301 is provided at the end of the pore water pressure probe 300, which extends to the surface of the detection probe 1, and the upper chamber is connected to the outside through an air window 13 provided on the surface of the detection probe 1. As can be seen from the above, the air window 13 is an opening on the surface of the detection probe 1, which connects the upper chamber of the detection probe 1 with the external soil environment. The gas detector 100 is installed in the upper chamber. When the detection probe 1 is inserted into the soil, the gas in the soil can enter the upper chamber through the air window 13.

[0039] Both sides of the detection probe 1 are provided with fixed rods 11 near the air window 13. The two fixed rods 11 are movably mounted on the detection probe 1 through a rotating shaft 111, and the two fixed rods 11 are respectively driven to swing by an electric push rod 14 arranged in the detection probe 1. A closing cover 112 is provided on the side of the upper end of the fixed rod 11. The closing cover 112 covers the surface of the air window 13. The two electric push rods 14 are arranged in an inclined shape. The output shaft of the electric push rod 14 is connected to the fixed rod 11 through a connecting shaft 141. A flat surface is provided on the side of the lower part of the fixed rod 11 near the electric push rod 14, and the connecting shaft 141 is connected to the flat surface.

[0040] Before the detection probe 1 is inserted into the soil, the fixed rod 11 is in a folded state. The closing cover 112 covers the surface of the air window 13 to protect it from soil particles entering the upper chamber during the insertion into the soil, causing damage to the gas detector 100 and the temperature detector 200. At the same time, this folded state makes the overall size of the detection probe 1 smaller, which is convenient for insertion into the soil, and when the detection probe 1 is inserted to a predetermined depth, the electric push rod 14 starts to work. Since the electric push rod 14 is arranged in an inclined shape and is connected to the fixed rod 11 through the connecting shaft 141. When the electric push rod 14 extends, it pushes the fixed rod 11 to swing outward around the rotating shaft 111. The straight surface on the side of the lower part of the fixed rod 11 close to the electric push rod 14 is the force point, so that the fixed rod 11 can be smoothly expanded outward.

[0041] After the fixing rod 11 is deployed outward, its upper end is inserted into the soil. Due to the length and shape of the fixing rod 11, it can provide support in the soil like an anchor. In this way, the detection probe 1 is well fixed in the soil. Even if the soil is affected by external factors (such as wind, water flow, etc.) and produces a certain degree of displacement, the detection probe 1 can remain stable. At the same time, the deployment of the fixing rod 11 will not cause excessive damage to the soil structure because it is operated after the detection probe 1 is inserted into the soil. Moreover, the insertion process is relatively smooth and does not cause severe disturbance to the soil structure like some traditional fixing methods (such as directly driving steel nails).

[0042] Among them, the closing cover 112 is provided with a fixing ring 1122 on the side close to the air window 13. The closing cover 112 is connected to the fixing ring 1122 through a rubber connecting ring 1123. The fixing ring 1122 is fixed to the surface of the detection probe 1, and the closing cover 112 is connected to the air window 13. An opening 1121 is provided at the lower end of the closing cover 112. A channel for gas flow is formed between the air window 13 and the opening 1121. The soil gas flows into the detection probe 1 through the channel. When the fixing rod 11 is driven by the electric push rod 14 to swing outward, the closing cover 112 moves outward accordingly and maintains a continuous connection with the fixing ring 1122 through the rubber connecting ring 1123, and the fixing ring 1122 is continuously fixed to the surface of the detection probe 1.

[0043] The elastic restoring force of the rubber connecting ring 1123 helps maintain the cover 112's coverage of the air window 13. When the fixed rod 11 is driven outward by the electric push rod 14, the rubber connecting ring 1123 is stretched, generating an elastic restoring force. This elastic restoring force causes the cover 112 to tend to return to its original position covering the air window 13 during the swinging process. An opening 1121 at the lower end of the cover 112 communicates with the air window 13, forming a passage for gas flow. The shape and position of this opening 1121 ensure that the cover 112 remains connected to the air window 13 through this opening during the swinging of the fixed rod 11. Although the cover 112 moves with the swinging of the fixed rod 11, the presence of opening 1121 allows gas around the air window 13 to enter the detection probe 1 through this passage. Furthermore, the shape and size of opening 1121 ensure that the gas flow passage is not completely blocked during the swinging process, thereby ensuring proper gas detection.

[0044] In addition, an embedding groove 12 is provided on the surface of the detection probe 1, and the fixing rod 11 is installed in the embedding groove 12. There is a gap between the fixing rod and the embedding groove, and the upper and lower ends of the fixing rod 11 away from the detection probe 1 are both inclined.

[0045] Furthermore, the air window 13 is provided with a mounting ring 131 and a filter element 132. The mounting ring 131 is arranged on the outside of the filter element 132. A rubber support layer 1311 is provided in the mounting ring 131, and there is a distance between the rubber support layer 1311 and the outer port of the air window 13 and the filter element 132. The inner diameter of the mounting ring 131 gradually decreases from one end close to the inner side of the detection probe 1 to the other end; the rubber support layer 1311 is woven from multiple strands of elastic rope, and the elastic rope is woven in a cross-staggered shape.

[0046] Furthermore, the filter element 132 includes a filter cotton layer 1321 and a support block 1322. The support blocks 1322 are arranged in an annular array. The support block 1322 is arranged on a side of the filter cotton layer 1321 away from the mounting ring 131. A cotton layer support member 1323 is provided between the support block 1322 and the filter cotton layer 1321. The cotton layer support member 1323 is an annular structure. The cotton layer support member 1323 extends along the edge of the filter cotton layer 1321. A support layer extending toward the middle of the cotton layer support member 1323 is provided on the surface of the cotton layer support member 1323. A gap for gas flow is provided between the support layers. The support layer is abutted against the surface of the filter cotton layer 1321. One end of the support block 1322 away from the support layer is bent inward.

[0047] The curved structure of support block 1322 better adapts to the shape and stress conditions of filter cotton layer 1321. When gas passes through filter cotton layer 1321, it exerts a certain amount of pressure on the filter cotton layer. The curved support block 1322 distributes this pressure more evenly, preventing deformation or damage to filter cotton layer 1321 under the influence of gas pressure. This curved structure ensures closer contact between support block 1322 and filter cotton layer 1321, enhancing the structural stability of the entire filter element 132.

[0048] Furthermore, the support layer includes support bars arranged in a rotating array and inner and outer support rings. The inner support ring is connected to the outer support ring through the support bars. The outer support ring abuts against the edge of the filter cotton layer 1321, while the inner support ring is arranged near the middle of the filter cotton layer 1321.

[0049] The middle portion of the support bar is bent toward the side away from the filter cotton layer 1321 , and every two adjacent support bars support and form the gap.

[0050] Example

[0051] In this embodiment, a method for using a static penetration probe for in-situ greenhouse gas measurement is proposed. The method is applied to the static penetration probe for in-situ greenhouse gas measurement. The method is characterized in that, when in use, a detection probe 1 is inserted into the soil, and air in the soil surrounding the detection probe 1 is allowed to flow into the detection probe 1 through an air window 13 provided on the side of the detection probe 1. The inflowing air is detected by a gas detector 100, and the soil temperature surrounding the detection probe 1 is detected by a temperature detector 200. Furthermore, a pore water pressure probe 300 is used to detect the pore water pressure when the detection probe 1 is inserted into the soil.

[0052] After the detection probe 1 is inserted into the soil, the electric push rod 14 drives the fixing rod 11 to swing outward, so that the fixing rod 11 swings with the rotating shaft 111 as the fulcrum, so that the upper end of the fixing rod 11 extends out of the embedding groove 12 and is inserted into the soil for fixation.

[0053] The above description is merely a preferred embodiment of the present invention and therefore cannot be used to limit the scope of the present invention. In other words, equivalent changes and modifications made according to the scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A static penetration probe for integrated in-situ measurement of greenhouse gases, characterized in that: The device comprises a detection probe equipped with a gas detector, a temperature detector and a pore water pressure detection head. The detection probe is provided with an upper chamber and a lower chamber. The gas detector and the temperature detector are both arranged in the upper chamber, and the pore water pressure detection head is arranged in the lower chamber. The end of the pore water pressure detection head is provided with a detection end, which extends to the surface of the detection probe. The upper chamber is connected to the outside through an air window provided on the surface of the detection probe. A fixing rod is provided on both sides of the detection probe near the air window. The two fixing rods are movably mounted on the detection probe through a rotating shaft provided at the lower end thereof, and the two fixing rods are respectively driven to swing by an electric push rod provided in the detection probe. A closing cover is provided on the side surface of the upper end of the fixing rod, and the closing cover covers the surface of the air window; The two electric push rods are arranged in an inclined shape, and the output shafts of the electric push rods are connected to the fixed rod through a connecting shaft. A flat surface is provided on the side of the lower part of the fixed rod close to the electric push rod, and the connecting shaft is connected to the flat surface; A fixing ring is provided on one side of the closing cover near the air window. The closing cover is connected to the fixing ring via a rubber connecting ring. The fixing ring is fixed to the surface of the detection probe. The closing cover is connected to the air window. An opening is provided at the lower end of the closing cover. A channel for gas flow is formed between the air window and the opening. Soil gas flows into the detection probe through the channel. When the fixing rod is driven by the electric push rod to swing outward, the closing cover moves outward accordingly and maintains continuous connection with the fixing ring through the rubber connecting ring, and the fixing ring is continuously fixed to the surface of the detection probe.

2. The static penetration probe for integrated greenhouse gas in-situ measurement according to claim 1, characterized in that: An embedding groove is provided on the surface of the detection probe, and the fixing rod is installed in the embedding groove. There is a gap between the fixing rod and the embedding groove, and the upper and lower ends of the fixing rod away from the detection probe are both inclined.

3. The static penetration probe for integrated in-situ measurement of greenhouse gases according to claim 2, characterized in that: The air window is provided with a mounting ring and a filter element. The mounting ring is arranged on the outside of the filter element. A rubber support layer is provided in the mounting ring. There is a gap between the rubber support layer and the outer port of the air window and the filter element. The inner diameter of the mounting ring gradually decreases from one end close to the inner side of the detection probe to the other end. The rubber supporting layer is woven from a plurality of elastic ropes, and the elastic ropes are woven in a cross-staggered shape.

4. The static penetration probe for integrated greenhouse gas in-situ measurement according to claim 3, characterized in that: The filter element includes a filter cotton layer and a support block. The support blocks are arranged in an annular array. The support block is arranged on a side of the filter cotton layer away from the mounting ring. A cotton layer support member is provided between the support block and the filter cotton layer. The cotton layer support member is an annular structure. The cotton layer support member extends along the edge of the filter cotton layer. A support layer extending toward the middle of the cotton layer support member is provided on the surface of the cotton layer support member. Notches for gas flow are provided between the support layers, and the support layer is abutted against the surface of the filter cotton layer. One end of the support block away from the support layer is bent inward.

5. The static penetration probe for integrated in-situ measurement of greenhouse gases according to claim 4, characterized in that: The support layer includes support bars arranged in a rotating array and inner and outer support rings, the inner support ring is connected to the outer support ring through the support bars, the outer support ring is against the edge of the filter cotton layer, and the inner support ring is arranged near the middle of the filter cotton layer; The middle portion of the support bar is bent toward a side away from the filter cotton layer, and every two adjacent support bars support and form the gap.

6. A method for using a static penetration probe for integrated in-situ measurement of greenhouse gases, applied to the static penetration probe for integrated in-situ measurement of greenhouse gases according to claim 5, characterized in that: When in use, the detection probe is inserted into the soil, and the air in the soil around the detection probe is allowed to flow into the detection probe through the air window provided on the side of the detection probe. The inflowing air is detected by the gas detector, and the soil temperature around the detection probe is detected by the temperature detector. The pore water pressure detection head is used to detect the pore water pressure when the detection probe is inserted into the soil. Among them, after the detection probe is inserted into the soil, the electric push rod drives the fixing rod to swing outward, so that the fixing rod swings with the rotating shaft as the fulcrum, so that the upper end of the fixing rod extends out of the embedding groove and is inserted into the soil for fixation.

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