Soil breathing chamber suitable for complex environment

Abstract

The utility model provides a soil breathing chamber suitable for a complex environment, which comprises a soil ring, the soil ring is detachably connected with a mounting plate through a clamp assembly, the mounting plate is fixedly connected with a support, a ground nail is fixedly arranged on the support, and the lower end of the soil ring is inserted into soil; the upper cover seals the upper end opening of the soil ring to form a sampling cavity; the gas analyzer is used for collecting the gas in the sampling cavity for detection. The utility model has the beneficial effects that the soil ring is detachably connected with the bracket through the clamp assembly, so that the soil rings with different lengths can be conveniently replaced according to use scenes, the application range is widened, and the working efficiency in the mounting process is improved.

Description

Technical Field

[0001] This invention belongs to the field of soil respiration measurement technology, and in particular relates to a soil respiration chamber suitable for complex environments. Background Technology

[0002] Soil respiration refers to the process by which soil releases carbon dioxide. Strictly speaking, it refers to all metabolic processes that produce carbon dioxide in undisturbed soil, including three biological processes (i.e., soil microbial respiration, root respiration, and soil animal respiration) and one non-biological process, namely the chemical oxidation of carbon-containing minerals. Traditional soil respiration chamber measurement equipment faces the following problems in special environments (such as freeze-thaw cycles, wetlands, and paddy fields): soil frost heave or settlement causes changes in the height of the measuring soil ring, reducing the sealing of the respiration chamber and affecting data accuracy; unstable soil structure easily causes equipment displacement or tipping, especially in strong winds or water level fluctuations; existing fixed devices are difficult to dynamically adapt to water level changes and freeze-thaw deformation, resulting in high installation and maintenance costs and low data acquisition rates.

[0003] In the existing technology, the following problems exist in the use of soil breathing chambers: First, the soil ring is fixedly connected to the support, making replacement inconvenient and resulting in low work efficiency; Second, the height of the support cannot be adjusted, which limits the scope of application; Third, it lacks dynamic adjustment and displacement compensation functions, which cannot meet the long-term monitoring needs in complex environments; Fourth, the soil ring is rigidly connected to the gas analyzer, and when the position of the soil ring changes, the connection structure between the soil ring and the gas analyzer is easily damaged, and it can also lead to sealing failure, affecting the measurement results. Utility Model Content

[0004] In view of this, the present invention aims to provide a soil breathing chamber suitable for complex environments, in order to solve at least one of the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A soil breathing chamber suitable for complex environments, comprising:

[0007] A soil ring is detachably connected to a mounting plate via a clamp assembly. The mounting plate is fixedly connected to a bracket, and a ground nail is fixed on the bracket. The lower end of the soil ring is inserted into the soil.

[0008] The upper cover closes the upper opening of the soil ring to form a sampling chamber;

[0009] A gas analyzer, wherein the gas analyzer collects and detects the gas in the sampling chamber.

[0010] Furthermore, the clamp assembly includes a C-shaped ring, with connecting plates fixed at both ends of the C-shaped ring. The connecting plates have through holes, and connecting bolts pass through the through holes and are threadedly connected to nuts. The soil ring is located inside the C-shaped ring.

[0011] One of the connecting plates is fixedly connected to the mounting plate.

[0012] Furthermore, the clamp assembly includes a connecting ring, the soil ring being interference-fitted to the inner side of the connecting ring, and the connecting ring being fixedly connected to the mounting plate.

[0013] Furthermore, the clamp assembly includes a mounting ring, the soil ring is mounted on the inner side of the mounting ring, the mounting ring is fixedly connected to the mounting plate, the side wall of the mounting ring has a threaded hole, the threaded hole is internally threaded with a set screw, and the set screw presses against the outer side wall of the soil ring.

[0014] Furthermore, the gas analyzer is equipped with a collection tube, the upper end of which is fixedly connected to the gas analyzer via a crossbar. The collection tube is connected to the gas inlet of the gas analyzer. The upper cover is movably connected to the collection tube in the vertical direction, and a compression spring is provided between the upper cover and the crossbar.

[0015] A sealing gasket is provided between the lower end of the upper cover and the soil ring;

[0016] A flange corresponding to the soil ring is fixed on the mounting plate, and the upper end of the soil ring protrudes from the upper end face of the flange.

[0017] Furthermore, the mounting plate is fixedly connected to the bracket, and the bracket is provided with a height adjustment component for adjusting the height of the bracket.

[0018] Furthermore, the height adjustment assembly includes a screw, an internally threaded tube is fixedly mounted on the bracket, the screw is threadedly connected to the internally threaded tube, a handle is fixedly mounted on the upper end of the screw, and a base plate is fixedly mounted on the lower end of the screw.

[0019] Furthermore, a connecting rope is fixedly mounted on the support, with one end of the connecting rope fixedly connected to the support and the other end fixedly connected to a ground nail, which is inserted into the soil.

[0020] Furthermore, a spirit level is fixedly mounted on the mounting plate;

[0021] The support frame is equipped with a counterweight compartment, which contains counterweight blocks.

[0022] Furthermore, the upper cover is provided with a flexible tube communicating with the sampling chamber, the flexible tube is connected to the gas inlet of the gas analyzer, the bracket is fixed with a vertically arranged linear guide rail, the upper cover is movably connected to the linear guide rail, and the upper cover is connected to the gas analyzer through a universal joint.

[0023] The top cover is attached to the upper end of the soil ring via a clamping assembly. The clamping assembly includes a clamping block, a tension spring, and a mounting post. One end of the mounting post is fixedly connected to the clamping assembly. One end of the clamping block has a sliding hole corresponding to the mounting post, and the mounting post is located inside the sliding hole. One end of the tension spring is fixedly connected to the clamping block, and the other end is fixedly connected to the clamping assembly. The tension spring is located outside the mounting post. The clamping block is used to clamp the top cover to fit against the upper end of the soil ring.

[0024] Compared with the prior art, the soil breathing chamber of this utility model suitable for complex environments has the following beneficial effects:

[0025] (1) The soil breathing chamber of this utility model is suitable for complex environments. The soil ring is detachably connected to the bracket through the clamp assembly, which makes it easy to replace soil rings of different lengths according to the usage scenario, thus broadening the scope of application and improving the work efficiency of the installation process.

[0026] (2) The soil breathing chamber of this utility model is suitable for complex environments. When installing the top cover, the clamping block is moved upward and the tension spring is stretched further. After the top cover is installed, the clamping block is rotated so that the end of the clamping block away from the sliding hole is aligned with the edge of the top cover. Under the tension of the tension spring, the clamping block moves downward to clamp the top cover. The tension spring applies a vertical clamping force of 10-50N to the top cover to ensure the sealing between the breathing chamber and the soil ring.

[0027] (3) The soil breathing chamber of this utility model is suitable for complex environments. By rotating the screw, the support can not only be leveled, but also the height of the support can be adjusted, making it suitable for different working environments. Attached Figure Description

[0028] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0029] Figure 1 This is a three-dimensional structural diagram of the breathing chamber described in Embodiment 1 of this utility model;

[0030] Figure 2 As described in the embodiments of this utility model Figure 1 Schematic diagram of the structure at point A in the middle;

[0031] Figure 3 This is a three-dimensional structural diagram of the breathing chamber described in Embodiment 2 of this utility model;

[0032] Figure 4 As described in the embodiments of this utility model Figure 3 Schematic diagram of the structure at point B;

[0033] Figure 5 This is a three-dimensional structural diagram of the breathing chamber described in Embodiment 3 of this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Gas analyzer; 2. Top cover; 3. Soil ring; 4. Mounting plate; 5. C-ring; 6. Mounting ring; 7. Connecting ring; 8. Bracket; 102. Collection tube; 101. Crossbar; 501. Connecting plate; 502. Connecting bolt; 601. Set screw. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0037] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] Example 1:

[0041] like Figure 1 , 2 As shown, a soil breathing chamber suitable for complex environments includes:

[0042] The soil ring 3 is detachably connected to the mounting plate 4 via a clamp assembly. The mounting plate 4 is fixedly connected to the bracket 8, and ground nails are fixed on the bracket 8. The lower end of the soil ring 3 is inserted into the soil.

[0043] The upper cover 2 closes the upper opening of the soil ring 3 to form a sampling chamber;

[0044] Gas analyzer 1 collects and detects the gas in the sampling chamber.

[0045] The clamp assembly includes a C-shaped ring 5, with connecting plates 501 fixed at both ends of the C-shaped ring 5. The connecting plates 501 have through holes, and connecting bolts 502 pass through the through holes and are threadedly connected to nuts. The soil ring 3 is located inside the C-shaped ring 5.

[0046] One of the connecting plates 501 is fixedly connected to the mounting plate 4.

[0047] Example 2:

[0048] like Figure 3 , 4 As shown, a soil breathing chamber suitable for complex environments includes:

[0049] The soil ring 3 is detachably connected to the mounting plate 4 via a clamp assembly. The mounting plate 4 is fixedly connected to the bracket 8, and ground nails are fixed on the bracket 8. The lower end of the soil ring 3 is inserted into the soil.

[0050] The upper cover 2 closes the upper opening of the soil ring 3 to form a sampling chamber;

[0051] Gas analyzer 1 collects and detects the gas in the sampling chamber.

[0052] The clamp assembly includes a mounting ring 6, a soil ring 3 is mounted on the inner side of the mounting ring 6, the mounting ring 6 is fixedly connected to the mounting plate 4, a threaded hole is opened on the side wall of the mounting ring 6, and a set screw 601 is threaded into the threaded hole, the set screw 601 is pressed against the outer side wall of the soil ring 3.

[0053] Example 3:

[0054] like Figure 5 As shown, a soil breathing chamber suitable for complex environments includes:

[0055] The soil ring 3 is detachably connected to the mounting plate 4 via a clamp assembly. The mounting plate 4 is fixedly connected to the bracket 8, and ground nails are fixed on the bracket 8. The lower end of the soil ring 3 is inserted into the soil.

[0056] The upper cover 2 closes the upper opening of the soil ring 3 to form a sampling chamber;

[0057] Gas analyzer 1 collects and detects the gas in the sampling chamber.

[0058] The clamp assembly includes a connecting ring 7, an earth ring 3 is interference-fitted to the inner side of the connecting ring 7, and the connecting ring 7 is fixedly connected to the mounting plate 4.

[0059] A sealing gasket is provided between the lower end of the upper cover 2 and the soil ring 3; the sealing interface between the soil ring 3 and the breathing chamber adopts the following design: the sealing gasket is a double-layer silicone sealing ring, the inner ring is an O-type static seal, and the outer ring is a lip-type dynamic seal, which adapts to the height change of the soil ring 3; the surface of the sealing ring is coated with polytetrafluoroethylene coating to reduce frictional resistance and extend the sealing life.

[0060] A flange corresponding to the soil ring 3 is fixed on the mounting plate 4, and the upper end of the soil ring 3 protrudes from the upper end face of the flange.

[0061] Mounting plate 4 is fixedly connected to bracket 8, which is equipped with a height adjustment component. The height adjustment component includes a screw, an internally threaded tube fixed to bracket 8, the screw being threadedly connected to the internally threaded tube, a handle fixed to the upper end of the screw, and a base plate fixed to the lower end of the screw. Rotating the screw not only levels the bracket 8 but also adjusts its height, making it suitable for different working environments.

[0062] A connecting rope is fixed to the support 8. One end of the connecting rope is fixedly connected to the support 8, and the other end is fixedly connected to the ground nail, which is inserted into the soil. The connecting rope is an anchoring steel wire, and the ground nail is a barbed anchor rod. The barbed anchor rod is inserted to a depth of ≥30cm to enhance the anchoring force of the soft soil in the wetland.

[0063] A spirit level is fixed on the mounting plate 4, which facilitates leveling the mounting plate 4 and improves installation accuracy.

[0064] The support frame 8 is equipped with a counterweight compartment containing a counterweight block. This counterweight block increases the weight of the breathing chamber, improving stability during use. The counterweight can be dynamically adjusted (0-20kg) according to wind speed, further reducing the risk of tipping over.

[0065] When the offset exceeds the threshold (≥3mm), an audible and visual alarm is triggered and data acquisition is paused until manual calibration.

[0066] The system incorporates tilt and displacement sensors to monitor the equipment's attitude in real time. When a change in the height of the soil ring 3 is detected, the controller automatically adjusts the hydraulic lifting module of the heightening bracket 8 to keep the breathing chamber and soil ring 3 in synchronous displacement (response time ≤ 5 seconds).

[0067] Auxiliary positioning piles (50cm apart) are added around the outer perimeter of the soil ring 3 and connected to the breathing chamber through elastic cables to form a secondary limiting protection net, which limits the horizontal displacement to ≤2mm.

[0068] In some embodiments, a collection tube 102 is fixedly mounted on the gas analyzer 1. The upper end of the collection tube 102 is fixedly connected to the gas analyzer 1 via a crossbar 101. The collection tube 102 is connected to the air inlet of the gas analyzer 1. The upper cover 2 is movably connected to the collection tube 102 in the vertical direction. A compression spring (not shown in the figure) is provided between the upper cover 2 and the crossbar 101. The compression spring applies a vertical clamping force of 10-50N to the upper cover 2 to ensure a rigid connection between the breathing chamber and the earth ring 3.

[0069] In other embodiments, the upper cover 2 is provided with a flexible tube communicating with the sampling chamber. The flexible tube is connected to the air inlet of the gas analyzer 1. A vertically arranged linear guide rail is fixed on the bracket 8. The upper cover 2 is movably connected to the linear guide rail. The upper cover 2 is connected to the gas analyzer 1 through a universal joint.

[0070] The linear guide is a high-precision linear guide, which allows the breathing chamber to slide in the vertical direction with a displacement accuracy of ≤1mm; the universal joint is a universal joint connector: connecting the breathing chamber and the heightening bracket 8, compensating for a horizontal tilt angle of ±5°, and preventing the equipment from being twisted by force.

[0071] The upper cover 2 is attached to the upper end of the soil ring 3 via a clamping assembly. The clamping assembly includes a clamping block, a tension spring, and a mounting post. One end of the mounting post is fixedly connected to the clamping assembly. One end of the clamping block has a sliding hole corresponding to the mounting post, and the mounting post is located inside the sliding hole. One end of the tension spring is fixedly connected to the clamping block, and the other end is fixedly connected to the clamping assembly. The tension spring is located outside the mounting post. The clamping block is used to clamp the upper cover 2 to fit against the upper end of the soil ring 3. When installing the upper cover 2, the clamping block is moved upward to further stretch the tension spring. After the upper cover 2 is installed, the clamping block is rotated so that the end of the clamping block away from the sliding hole is aligned with the edge of the upper cover 2. Under the tension of the tension spring, the clamping block moves downward to clamp the upper cover 2. The tension spring applies a vertical clamping force of 10-50N to the upper cover 2 to ensure the seal between the breathing chamber and the soil ring 3.

[0072] Beneficial effects:

[0073] The soil ring 3 is detachably connected to the bracket 8 via a clamp assembly, which makes it easy to replace soil ring 3 of different lengths according to the usage scenario, thus broadening the scope of application and improving the work efficiency of the installation process.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

[0075] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A soil respiration chamber suitable for use in complex environments, characterized in that, The utility model relates to a kind of soil sampling device, including: Earth ring (3), the earth ring (3) is detachably connected with mounting plate (4) by clamp assembly, mounting plate (4) is fixedly connected with support (8), ground nail is fixed on support (8), the lower end of the earth ring (3) is inserted into soil; Upper cover (2), the upper cover (2) closes the upper end opening of earth ring (3) and forms sampling cavity; Gas analyzer (1), the gas analyzer (1) gathers the gas in sampling cavity and carries out detection.

2. The soil respiration chamber suitable for complex environments of claim 1, wherein: The clamp assembly includes C-shaped ring (5), both ends of the C-shaped ring (5) are fixedly provided with connecting plate (501), the connecting plate (501) is provided with through hole, connecting bolt (502) is penetrated through through hole and is threadedly connected with nut, and the earth ring (3) is located on the inner side of the C-shaped ring (5). One of the connecting plates (501) is fixedly connected with the mounting plate (4).

3. The soil respiration chamber suitable for complex environments of claim 1, wherein: The clamp assembly includes connecting ring (7), the earth ring (3) is interference-connected to the inner side of the connecting ring (7), and the connecting ring (7) is fixedly connected with the mounting plate (4).

4. The soil respiration chamber suitable for complex environments of claim 1, wherein: The clamp assembly includes mounting ring (6), the earth ring (3) is mounted to the inner side of the mounting ring (6), the mounting ring (6) is fixedly connected with the mounting plate (4), the side wall of the mounting ring (6) is provided with threaded hole, the threaded hole is threadedly connected with jackscrew (601), and the jackscrew (601) is tightly pressed to the outer side wall of the earth ring (3).

5. The soil respiration chamber suitable for complex environments of claim 1, wherein: The gas analyzer (1) is fixedly provided with collecting pipe (102), the upper end of the collecting pipe (102) is fixedly connected with the gas analyzer (1) through cross bar (101), the collecting pipe (102) is communicated with the gas inlet end of the gas analyzer (1), the upper cover (2) is movably connected to the collecting pipe (102) along the vertical direction, and the upper cover (2) and the cross bar (101) are provided with compression spring. The lower end of the upper cover (2) and the earth ring (3) are provided with sealing gasket. The mounting plate (4) is fixedly provided with flange plate corresponding to the earth ring (3), and the upper end of the earth ring (3) protrudes from the upper end surface of the flange plate.

6. The soil respiration chamber suitable for complex environments of claim 1, wherein: The mounting plate (4) is fixedly connected with the support (8), and the support (8) is provided with height adjusting assembly for adjusting the height of the support (8).

7. A soil respiration chamber suitable for use in complex environments according to claim 6, wherein: The height adjusting assembly includes screw rod, the support (8) is fixedly provided with internally threaded pipe, the screw rod is threadedly connected with the internally threaded pipe, the upper end of the screw rod is fixedly provided with handle, and the lower end of the screw rod is fixedly provided with bottom plate.

8. The soil respiration chamber suitable for complex environments of claim 6, wherein: The support (8) is fixedly provided with connecting rope, one end of the connecting rope is fixedly connected with the support (8), the other end is fixedly connected with ground nail, and the ground nail is inserted into soil.

9. The soil respiration chamber suitable for complex environments of claim 6, wherein: The mounting plate (4) is fixedly provided with level; The support (8) is provided with counterweight bin, and the counterweight bin is provided with counterweight.

10. The soil respiration chamber suitable for complex environments of claim 6, wherein: The upper cover (2) is provided with hose communicated with the sampling cavity, the hose is connected with the gas inlet end of the gas analyzer (1), the support (8) is fixedly provided with vertically arranged linear guide rail, the upper cover (2) is movably connected to the linear guide rail, and the upper cover (2) is connected with the gas analyzer (1) through universal joint. The upper cover (2) is attached to the upper end of the earth ring (3) through a clamping assembly, the clamping assembly comprises a clamping block, a tension spring and a mounting column, one end of the mounting column is fixedly connected with the clamp assembly, one end of the clamping block is provided with a sliding hole corresponding to the mounting column, the mounting column is located in the inner side of the sliding hole, one end of the tension spring is fixedly connected with the clamping block, and the other end is fixedly connected with the clamp assembly, and the tension spring is located on the outer side of the mounting column, and the clamping block is used for clamping the upper cover (2) and the upper end of the earth ring (3).

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