Flexible segmental monitoring device for carbon dioxide concentration of middle-shallow soil
By using modular sampling tubes and automated vacuum sampling technology, the problems of low efficiency and disturbance in collecting soil gases in sealed static boxes have been solved, enabling flexible multi-depth soil CO2 concentration monitoring, reducing maintenance costs and improving sampling accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-03-20
AI Technical Summary
Existing closed static chambers for collecting soil gases are inefficient, cannot determine the collection depth, and disturb the soil structure, affecting the test results.
The modular sampling tube design with threaded connection, combined with a conical sampling head and a rotating handle assembly, achieves automated vacuuming and sampling by driving a rotating baffle with a motor, reducing soil disturbance and improving sampling accuracy.
It enables flexible monitoring of soil CO2 concentration at multiple depths, reduces maintenance costs, minimizes soil disturbance, and improves sampling accuracy and efficiency.
Smart Images
Figure CN224019792U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of soil air composition monitoring, concretely relates to a flexible middle and shallow layer soil carbon dioxide concentration segmented monitoring device. BACKGROUND
[0002] Soil air is the general term of gas existing in soil, which usually exists in soil pore in free state, in soil water solution in dissolved state or in soil particle in adsorbed state. Soil air is one of important components of soil, has great significance for plant growth and soil formation, is an important content of research in the field of soil science, agronomy, geochemistry, environmental science and chemistry and other disciplines. Meanwhile, soil organic carbon pool is the largest organic carbon pool in terrestrial system, is about 2-3 times of atmospheric carbon pool storage, and the annual exchange amount of carbon between soil and atmosphere is as high as 60-80 billion tons. Every tiny change of soil carbon pool will affect the concentration of atmospheric carbon dioxide, and even cause global climate change. Accurate finding out soil gas composition and change trend is the prerequisite of carrying out soil carbon fixation technology research, and the sampling method of soil air is an important basis of soil air research.
[0003] At present, carbon dioxide detection in soil mainly uses closed static box to collect soil air sample, and then uses gas chromatography to detect. Soil gas is collected by using closed static box, which needs to pre-bury static box and extract gas in the box to form vacuum, and then soil gas can diffuse into the static box. The structure of closed static box is relatively complex, and it takes a long time, and the collection efficiency is low, and the depth of collected gas in soil cannot be determined, which is not conducive to rapid and efficient collection of soil gas. In addition, the burying of closed static box will cause a certain degree of disturbance to surface soil, which leads to the pollution of soil gas by atmosphere and affects the detection result of carbon dioxide in soil. Therefore, a flexible middle and shallow layer soil carbon dioxide concentration segmented monitoring device is urgently needed to solve the problems encountered in actual sampling work. UTILITY MODEL CONTENT
[0004] To solve the above technical problems, the utility model provides a technical scheme: a flexible middle and shallow soil carbon dioxide concentration segmented monitoring device, including equipment box and the monitoring equipment, collection equipment received in equipment box, the collection equipment includes the sampling head, a plurality of sampling tubes, the sampling head bottom is the conical head, and the top sets up the sampling head nut, the sampling tube includes the sampling cylinder outer tube of sleeve joint setting, the sampling cylinder inner tube, a plurality of sampling cylinder baffle are arranged outside the sampling cylinder inner tube and are connected with the sampling cylinder outer tube inner wall, one end of the sampling cylinder inner tube is provided with solid block, the solid block is provided with the same size outer thread as the sampling head nut outside, the other end of the sampling cylinder inner tube is provided with the internal thread matched with the solid block and the sampling head nut outer thread, so that the sampling head can be connected with the sampling tube through the thread, and a plurality of sampling tubes can also be connected through the thread, the middle part of the solid block is provided with T type square hole, the T type square hole includes the vertical square hole through the solid block and the half -penetrating square hole of the vertical square hole and the sampling cylinder inner tube outside, the transverse air hole passes through the air inlet channel and communicates with the outside, the communication of the square hole and the vertical square hole is rotatably provided with the rotary baffle, so that the rotary baffle closes the square hole, and the vertical square hole is communicated, or the rotary baffle closes the vertical square hole, and the square hole is communicated, the CO2 concentration detector is arranged on the upper portion of the solid block, the sampling tube top is provided with the rotary handle assembly, and the rotary handle assembly is connected with the monitoring equipment through the exhaust hose.
[0005] Further, one corner of the rotary baffle is rotatably connected with the communication of the square hole and the vertical square hole through a pin shaft, the pin shaft is driven by a motor, and a rotary baffle controller connected with the driving motor of the pin shaft is arranged on the solid block.
[0006] Further, the rotary handle assembly includes a rotary handle inner cylinder and a rotary handle outer cylinder arranged in sleeve, the rotary handle inner cylinder is arranged on the rotary handle assembly baffle connected with the rotary handle outer cylinder at the top and is arranged on the outer thread matched with the internal thread of the top of the sampling cylinder inner tube at the bottom, so that the rotary handle assembly is connected with the sampling cylinder through the thread cooperation, a sealing cover is arranged on the top of the rotary handle inner cylinder, an exhaust connector connected with the exhaust hose is arranged on the sealing cover, and handles are arranged on the two sides of the rotary handle outer cylinder.
[0007] Further, the monitoring device includes a monitoring device shell, a plurality of power interfaces and a plurality of signal interfaces, a switch button, an air inlet pipe, a display screen, an exhaust port and a vacuum pump are arranged on the monitoring device shell, and a signal processor and a controller are arranged in the monitoring device shell, the air inlet pipe is connected with the sampling cylinder inner tube through the exhaust hose, and the exhaust port is connected with the exhaust end of the vacuum pump and extends to the outside of the monitoring device shell.
[0008] Further, the signal lines of the rotating baffle controller and the CO2 concentration detector in the sampling tube are respectively connected to the signal interface of the signal processor, the power lines of the rotating baffle controller and the CO2 concentration detector in the sampling tube are respectively connected to the power supply interface of the power supply, the power supply is connected to the signal processor, the controller, the vacuum pump and the display device to supply power, the controller controls the power supply, the signal processor, the vacuum pump, the display screen, the switch, the rotating baffle controller and the CO2 concentration detector, the air inlet pipe and the exhaust port are connected to the vacuum pump, and the air inlet pipe is connected to the exhaust joint of the rotating handle assembly through the exhaust hose.
[0009] Further, the device box comprises a device box body and a device box cover which are connected through a rotating shaft and can be opened and closed, and the inside of the device box body is filled with a box sponge, and the box sponge has a monitoring device reserved hole, a sampling cylinder reserved hole, a sampling head reserved hole and a rotating handle assembly reserved hole.
[0010] Further, the device box body is provided with a handle and a buckle protrusion on the outside, and the device box cover is provided with a buckle on the outside which is buckled with the buckle protrusion.
[0011] Further, the inside of the device box cover is provided with a box cover sponge.
[0012] Further, the device box body and the device box cover are provided with protruding box reinforcing members which are longitudinally and transversely arranged.
[0013] Compared with the prior art, the utility model has the advantages of:
[0014] (1) The utility model discloses a modular sampling tube design which can be screwed, and different depths of soil monitoring can be realized by increasing or decreasing the number of sampling tubes, thereby breaking through the limitation of single-point monitoring and simultaneously monitoring the CO2 concentration of multiple different depths of soil.
[0015] (2) The utility model discloses a mechanical structure of a conical head sampling head and a rotating handle assembly, which can be easily wedged into the soil by manual rotation without the need for complex power equipment, is suitable for various terrains and reduces the disturbance to the soil structure.
[0016] (3) The utility model discloses a combination design of a T-shaped square hole and a rotating baffle, which can realize the automatic switching of "vacuumizing-sampling" by driving the rotating baffle by a motor: first, close the horizontal square hole to vacuumize, and then close the vertical square hole to suck in the soil air, thereby avoiding air path pollution and improving sampling accuracy.
[0017] (4) The device box is filled with a sponge and reinforced, can accommodate all components and provide shock protection, and the buckle type opening and closing design is convenient for rapid deployment and suitable for field operation scenes. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the sampling head in a flexible, segmented monitoring device for carbon dioxide concentration in shallow to medium soil according to this utility model.
[0019] Figure 2 This is a schematic diagram of the sampling tube structure in a flexible, segmented monitoring device for carbon dioxide concentration in shallow to medium soil according to this utility model.
[0020] Figure 3 This is a schematic diagram of the internal structure of the sampling tube in a flexible, segmented monitoring device for carbon dioxide concentration in shallow to medium soil according to this utility model.
[0021] Figure 4 This is a schematic diagram of the structure of a flexible, segmented monitoring device for carbon dioxide concentration in shallow to medium soil when the rotating partition closes the horizontal square hole.
[0022] Figure 5 This is a schematic diagram of the structure of a flexible, segmented monitoring device for carbon dioxide concentration in shallow to medium soil when the rotating partition closes the vertical square hole.
[0023] Figure 6 This is a schematic diagram of the pin structure in a flexible segmented monitoring device for carbon dioxide concentration in shallow to medium soil according to this utility model.
[0024] Figure 7 This is a schematic diagram of the rotating handle assembly in a flexible, segmented monitoring device for carbon dioxide concentration in shallow to medium soil according to this utility model.
[0025] Figure 8 This is a schematic diagram of the monitoring equipment in a flexible, segmented monitoring device for carbon dioxide concentration in shallow to medium soil according to this utility model.
[0026] Figure 9 This is a schematic diagram of the internal structure of the monitoring equipment in a flexible segmented monitoring device for carbon dioxide concentration in shallow and medium soil according to this utility model.
[0027] Figure 10 This is a schematic diagram of the equipment box in a flexible, segmented monitoring device for carbon dioxide concentration in shallow to medium soil according to this utility model. Detailed Implementation
[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.
[0029] In the description of the embodiments of the utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the utility model product in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.
[0030] In addition, if the terms "horizontal", "vertical", "overhanging" and the like appear, they do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0031] In the description of the embodiments of the utility model, "a plurality of" represents at least 2.
[0032] In the description of the embodiments of the utility model, it should also be noted that unless otherwise explicitly specified and limited, if the terms "set", "installed", "connected", "connected" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0033] Embodiment:
[0034] In combination with the drawings Figures 1-10The embodiment discloses a flexible middle and shallow soil carbon dioxide concentration segmented monitoring device, which comprises a device box and a monitoring device and a collecting device accommodated in the device box; the collecting device comprises a sampling head A and a plurality of sampling pipes B; the bottom of the sampling head A is a conical head 1, and the top of the sampling head A is provided with a sampling head nut 2; the sampling pipe B comprises a sampling cylinder outer pipe 4 and a sampling cylinder inner pipe 7 which are sleeved; a plurality of sampling cylinder partition plates 6 are arranged on the outer side of the sampling cylinder inner pipe 7 and connected with the inner wall of the sampling cylinder outer pipe 4; a solid block 7.1 is arranged at one end of the sampling cylinder inner pipe 7; an outer thread 12 with the same size as the sampling head nut 2 is arranged outside the solid block 7.1; an inner thread 5 matched with the solid block 7.1 and the outer thread 12 of the sampling head nut 2 is arranged at the other end of the sampling cylinder inner pipe 7, so that the sampling head A can be connected with the sampling pipe B through threads, and the plurality of sampling pipes B can also be connected through threads; a T-shaped square hole 11 is arranged in the middle of the solid block 7.1; the T-shaped square hole 11 comprises a vertical square hole 11.1 penetrating through the solid block 7.1 and a half-penetrating square hole 11.2 communicating the vertical square hole 11.1 with the outside of the sampling cylinder inner pipe 7; the transverse square hole 11.2 is communicated with the outside through an air inlet channel 3 penetrating through the sampling cylinder outer pipe 4; a rotating partition plate 10 is rotatably arranged at the communication position of the vertical square hole 11.1 and the half-penetrating square hole 11.2, so that the vertical square hole 11.1 is communicated when the rotating partition plate 10 closes the half-penetrating square hole 11.2, as shown in FIG. 2, or the half-penetrating square hole 11.2 is communicated when the rotating partition plate 10 closes the vertical square hole 11.1, as shown in FIG. 3; a CO2 concentration detector 9 is arranged on the upper part of the solid block 7.1; a rotating handle assembly C is arranged on the top of the sampling pipe B, and the rotating handle assembly C is connected with the monitoring device through an exhaust hose. Figure 4 Figure 5
[0035] The rotating partition plate 10 is rotatably connected with the communication position of the half-penetrating square hole 11.2 and the vertical square hole 11.1 through a pin shaft 11.3, as shown in FIG. 4; the free end of the rotating partition plate 10 is an arc-shaped end, which facilitates the rotation of the rotating partition plate 10 between the half-penetrating square hole 11.2 and the vertical square hole 11.1; the other end of the rotating partition plate 10 is provided with the pin shaft 11.3 penetrating through the shaft hole in the solid block 7.1; the pin shaft 11.3 is driven by a motor, and the motor can be arranged in the solid block; a rotating partition plate controller 8 is arranged on the solid block 7.1 and connected with the driving motor of the pin shaft. Figure 6
[0036] The rotating handle assembly C comprises a rotating handle inner cylinder 18 and a rotating handle outer cylinder 13 which are sleeved; the rotating handle inner cylinder 18 is arranged on the rotating handle partition plate 17 connected with the rotating handle outer cylinder 13 at the top and is provided with an outer thread matched with the inner thread 5 at the top of the sampling cylinder inner pipe 7 at the bottom, so that the rotating handle assembly C is connected with the sampling cylinder through thread cooperation; a sealing cover 15 is arranged on the top of the rotating handle inner cylinder 18; an exhaust joint 16 connected with the exhaust hose is arranged on the sealing cover 15; handle 14 is arranged on the two sides of the rotating handle outer cylinder 13.
[0037] The monitoring device comprises a monitoring device shell 24, a switch 23, an air inlet pipe 21, a display screen 22, an air outlet 20, a plurality of power supply interfaces 25 and a plurality of signal interfaces 19 distributed on the monitoring device shell 24, and a power supply 26, a signal processor 29, a controller 27 and a vacuum pump 28 arranged inside; the air inlet pipe 21 is connected with the inner tube 7 of the sampling cylinder through an exhaust hose, and the air outlet 20 is connected with the air outlet end of the vacuum pump 28 and extends to the outside of the monitoring device shell 24.
[0038] The signal lines of the rotating baffle controller 8 and the CO2 concentration detector 9 in the sampling pipe B are connected with the signal interfaces 19 of the signal processor 29, and the power supply lines of the rotating baffle controller 8 and the CO2 concentration detector 9 in the sampling pipe B are connected with the power supply interfaces of the power supply 26; the power supply 26 is also connected with the signal processor 29, the controller 27, the vacuum pump 28 and the display device to supply power for them; the controller 27 controls the power supply, the signal processor 29, the vacuum pump 28, the display screen 22, the switch 23, the rotating baffle controller 8 and the CO2 concentration detector 9; the air inlet pipe 21 is connected with the vacuum pump 28, and the other end of the air inlet pipe 21 is connected with the exhaust connector 16 of the rotating handle assembly C through an exhaust hose; in this embodiment, the signal processor, the rotating baffle controller, the CO2 concentration detector, the power supply, the controller, the vacuum pump and the display screen all adopt existing devices, and those skilled in the art can select appropriate products according to specific conditions, for example, the controller selects STM32F103C8T6 (STMicroelectronics), the rotating baffle controller selects DRV8825 (Texas Instruments), the CO2 concentration detector selects SenseAir S8-0024 (Sweden Senel), the power supply selects DFRobot 18650 portable multi-channel adjustable power supply, the vacuum pump selects KNF N86KTE8 (Germany KNF), the display screen selects 128x64 OLED module (SSD1306 driver), the sensor is connected with the controller through SPI / I2C, the vacuum pump is controlled by a PWM signal, and the display screen communicates through an SPI interface; an LC filter is added to the power supply end, twisted pair is used for signal lines, and the motor drive module is isolated from the main control board for power supply.
[0039] The device box comprises a device box body 30 and a device box cover 31 which are connected by a rotating shaft and can be opened and closed, the device box body 30 is filled with a box sponge 38, and the box sponge 38 is provided with a monitoring device reserved hole 39, a sampling cylinder reserved hole 40, a sampling head A reserved hole 42 and a rotating handle reserved hole 41.
[0040] The device box body 30 is externally provided with a handle 33 and a buckle protrusion 34, and the device box cover 31 is externally provided with a buckle 35 which is buckled with the buckle protrusion 34; the device box cover 31 is internally provided with a cover sponge 38. The device box body 30 and the device box cover 31 are provided with longitudinal and transverse intersecting protruding box reinforcing parts 36.
[0041] In specific use, first, the monitoring device, the sampling head A, several sampling tubes and the rotating handle assembly C are taken out from the device box, and then the device is assembled, specifically: the sampling head A, several sampling tubes and the rotating handle assembly C are connected by screw nuts to form a sampling device;
[0042] Secondly, the sampling device is slowly wedged into the target soil by rotating the rotating handle assembly C, the exhaust joint 16 and the air inlet pipe 21 are connected by the exhaust hose, and the signal line and the power supply line in each sampling tube B are connected with the signal interface 19 and the power supply interface on the monitoring device;
[0043] Thirdly, the monitoring device switch is turned on, the controller 27 sends signals to the vacuum pump 28 and the rotating baffle controller 8, the rotating baffle 10 blocks the horizontal hole 11.2 of the T-shaped hole, the vacuum pump 28 performs vacuumization on the sampling device through the exhaust hose, then the rotating baffle 10 blocks the vertical hole 11.1 of the T-shaped hole, and the soil air is sucked into each sampling tube, the CO2 concentration detector 9 detects the CO2 concentration in the gas, transmits the signal to the signal processor 29, the signal processor 29 transmits the CO2 concentration data to the controller 27, the controller 27 displays the data on the display screen 22, and the cycle is repeated.
[0044] The above describes the utility model and its implementation mode, which is not limited, and the drawings shown are only one of the embodiments of the utility model, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired, without departing from the creative purpose of the utility model, without creative design, similar structure modes and embodiments of the technical scheme should belong to the protection scope of the utility model.
Claims
1. A flexible segmented monitoring device for carbon dioxide concentration in shallow to medium-depth soil, characterized in that, The system includes an equipment box and monitoring and data acquisition devices housed within it. The data acquisition devices include a sampling head and multiple sampling tubes. The sampling head has a conical bottom and a sampling head nut at the top. Each sampling tube includes an outer sampling tube and an inner sampling tube that are sleeved together. Several sampling tube partitions connected to the inner wall of the outer sampling tube are circumferentially arranged on the outer side of the inner sampling tube. A solid block is provided at one end of the inner sampling tube, and an external thread of the same size as the sampling head nut is provided on the outside of the solid block. The other end of the inner sampling tube has an internal thread that mates with the external threads of the solid block and the sampling head nut, allowing the sampling head to be threadedly connected to the sampling tubes. Multiple sampling tubes are included. The components can also be connected by threads; a T-shaped square hole is provided in the middle of the solid block, the T-shaped square hole includes a vertical square hole that penetrates the solid block, and a semi-penetrating horizontal square hole that connects the vertical square hole to the outside of the inner tube of the sampling tube. The horizontal hole passes through the air inlet channel and exits the outer tube of the sampling tube to communicate with the outside; a rotating baffle is rotatably provided at the connection between the horizontal square hole and the vertical square hole, so that when the rotating baffle closes the horizontal square hole, the vertical square hole is connected, or when the rotating baffle closes the vertical hole, the horizontal hole is connected. A CO2 concentration detector is provided on the upper part of the solid block; a rotating handle assembly is provided on the top of the sampling tube, and the rotating handle assembly is connected to the monitoring equipment through an exhaust hose.
2. The flexible segmented monitoring device for carbon dioxide concentration in shallow and intermediate soils according to claim 1, characterized in that, One corner of the rotating partition is rotatably connected to the horizontal square hole and the vertical square hole through a pin. The pin is driven by a motor. The solid block is equipped with a rotating partition controller connected to the drive motor of the pin.
3. The flexible segmented monitoring device for carbon dioxide concentration in shallow to medium soil according to claim 1, characterized in that, The rotating handle assembly includes a rotating handle inner cylinder and a rotating handle outer cylinder that are sleeved together. The top of the rotating handle inner cylinder is provided with a rotating handle assembly partition connected to the rotating handle outer cylinder, and the bottom is provided with an external thread that mates with the internal thread at the top of the sampling cylinder inner tube, so that the rotating handle assembly is connected to the sampling cylinder through the threaded engagement. The top of the rotating handle inner cylinder is provided with a sealing cap, and the sealing cap is provided with an exhaust connector that connects to the exhaust hose. Handles are provided on both sides of the rotating handle outer cylinder.
4. The flexible segmented monitoring device for carbon dioxide concentration in shallow and intermediate soils according to claim 1, characterized in that, The monitoring device includes a monitoring device housing, on which are distributed a switch button, an air inlet pipe, a display screen, an exhaust port, several power interfaces and several signal interfaces. Inside, there is a power supply, a signal processor, a controller and a vacuum pump. The air inlet pipe is connected to the inner tube of the sampling cylinder through an exhaust hose, and the exhaust port is connected to the exhaust end of the vacuum pump and extends to the outside of the monitoring device housing.
5. A flexible segmented monitoring device for carbon dioxide concentration in shallow to medium soil according to claim 4, characterized in that, The signal lines of the rotating baffle controller and the CO2 concentration detector in the sampling tube are respectively connected to the signal interface on the signal processor. The power lines of the rotating baffle controller and the CO2 concentration detector in the sampling tube are respectively connected to the power supply interface on the power supply. The power supply also supplies power to the signal processor, the controller, the vacuum pump and the display device. The controller controls the power supply, the signal processor, the vacuum pump, the display screen, the switch, the rotating baffle controller and the CO2 concentration detector. The air inlet pipe and the exhaust port are connected to the vacuum pump. The other end of the air inlet pipe is connected to the exhaust connector on the rotating handle assembly through the exhaust hose.
6. A flexible segmented monitoring device for carbon dioxide concentration in shallow to medium soils according to claim 1, characterized in that, The equipment box includes an equipment box body and an equipment box cover connected by a pivot and which can be opened and closed. The equipment box body is filled with box body sponge, and the box body sponge has reserved holes for monitoring equipment, sampling tube, sampling head and rotating handle assembly.
7. A flexible segmented monitoring device for carbon dioxide concentration in shallow to medium soils according to claim 6, characterized in that, The equipment housing is provided with a handle and buckle protrusions on the outside, and the equipment housing cover has buckles that engage with the buckle protrusions on the outside.
8. A flexible segmented monitoring device for carbon dioxide concentration in shallow to medium soil according to claim 6, characterized in that, The equipment box cover has a sponge inside.
9. A flexible segmented monitoring device for carbon dioxide concentration in shallow to medium soils according to claim 6, characterized in that, The equipment housing and equipment housing cover have crisscrossing protruding housing reinforcements.