Telescopic rice greenhouse gas collecting device
The design of a retractable rice greenhouse gas collection device solves the problems of plant damage and inaccurate data caused by height changes during the rice growth cycle. It enables flexible adjustment of the collection space and airtight sampling, enhancing the stability of the device and the accuracy of the data.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-04
- Publication Date
- 2026-04-07
AI Technical Summary
The fixed box structure of existing rice greenhouse gas collection devices cannot adapt to the height changes during the rice growth cycle, resulting in plant damage and inaccurate data collection.
A retractable greenhouse gas collection device for rice is designed, which adopts a sliding structure with an inner shell and an outer shell and a hollow lifting column, combined with a combination structure of a stabilizing plate and soil nails, to achieve flexible adjustment of the collection space and maintain airtightness.
This allows for flexible adjustment of the sampling space during rice growth, avoiding damage to the plants, ensuring airtight sampling, and enhancing the stability of the device and the accuracy of the collected data in wetland environments.
Smart Images
Figure CN224095476U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to greenhouse gas monitoring equipment technical field especially relates to a telescopic rice greenhouse gas collection device. BACKGROUND
[0002] In global climate change research, rice field ecosystem as the important emission source of atmospheric methane and nitrous oxide has been paid attention by environmental science field, in order to accurately quantitatively evaluate the greenhouse gas emission characteristics and emission reduction potential of rice field, scientific researchers widely adopt static dark box method and transparent box method to carry out in-situ observation, this monitoring technology utilizes the base prepositioned in the soil and the movable cover box of top to form a temporary closed space, and the soil and rice plants breathe and emit gas in the closed space, and the gas concentration in the box changes, then the gas sample in the box is extracted by air pump, and the gas concentration change rate with time is detected by gas chromatograph analysis equipment, and then the greenhouse gas emission flux is calculated, the existing static collection box structure is mostly made of fixed size rigid square box of stainless steel and organic glass material.
[0003] The fixed size rigid static box widely used in prior art although simple structure can meet the sampling demand of low plant in seedling stage, but when facing the significant height change of rice in whole growth period, serious structural adaptability defects are shown, since the height of rice plant will show explosive growth in jointing and elongating ear stage, and the height of traditional monomer box is constant and cannot be self-adaptively adjusted with plant growth, when the monitoring object grows to exceed the limit of box capacity, forcibly carrying out cover box operation will inevitably cause the mechanical breakage and irreversible bending of top leaves and stems of rice, and this physical damage not only destroys the normal physiological growth state of plant, but also induces the plant to produce stress response, thereby significantly changing the photosynthesis efficiency and root secretion composition, and further causing abnormal fluctuation of greenhouse gas generation, transmission and emission law, so that the flux data finally collected loses scientific accuracy and representativeness.
[0004] Therefore, the utility model provides a telescopic rice greenhouse gas collection device to solve the shortage of prior art. UTILITY MODEL CONTENT
[0005] In view of the problem that the fixed box structure of rice greenhouse gas collection device in prior art cannot adapt to the height change of rice growth cycle, leading to plant damage and inaccurate collection data, the utility model aims at providing a telescopic rice greenhouse gas collection device with improved structure, which can effectively solve the above problems.
[0006] The utility model provides a telescopic rice greenhouse gas collection device, include: the steady board, the top four all around of steady board is fixedly connected with stand, four the top fixedly connected with same mounting panel of stand, the top fixedly connected with inner housing of mounting panel, and shell, guide rail, sliding slot, hollow lifting column and gas collection subassembly.
[0007] Among them, the front and rear ends of the inner housing are fixedly connected with guide rails, the outer wall of the inner housing is slidably connected with the shell, the inner sides of the front and rear of the shell are provided with sliding grooves, the guide rails are slidably connected in the sliding grooves, hollow lifting columns are installed around the inner side of the inner housing, the bottom of the hollow lifting column is fixedly connected to the top of the mounting plate, and the top of the hollow lifting column abuts against the inner side top of the shell.
[0008] Furthermore, the shell, the inner housing and the hollow lifting column are combined by sleeving and sliding cooperation, the top of the shell is connected with an air outlet pipe on both sides, the top of the air outlet pipe is fixedly connected with a gas pump, the front side of the gas pump is connected with a connecting pipe, and the bottom of the shell is fixedly connected with a sealing soft pad.
[0009] Preferably, the bottom of the steady board is fixedly connected with soil nails around, and the bottom end of the soil nail is designed in a conical sharp structure.
[0010] Preferably, a rice penetrating hole one is formed through the top center of the steady board, and the inner diameter of the rice penetrating hole one is greater than the outer diameter of the root of the rice plant.
[0011] Preferably, a rice penetrating hole two is formed through the center of the mounting plate, and the rice penetrating hole two is on the same axis as the rice penetrating hole one in the vertical direction.
[0012] Preferably, the pump body of the gas pump is made of corrosion-resistant engineering plastic and 304 stainless steel material.
[0013] Preferably, a sealing ring is fixedly connected at the sliding contact position between the inner wall of the shell and the outer wall of the inner housing, and the sealing ring is made of rubber material.
[0014] Preferably, a connecting joint is arranged at the end of the connecting pipe away from the gas pump, and the connecting joint is used for connecting an external gas storage device.
[0015] Preferably, the inner housing and the shell are made of transparent acrylic plate material, and the stand and the soil nail are made of stainless steel material.
[0016] The utility model has the following beneficial effects:
[0017] 1. This utility model solves the problem that existing fixed collection boxes cannot adapt to the height changes of rice throughout its entire growth cycle, which leads to plant damage, by using a sliding structure design with an inner shell and an outer shell and a hollow lifting column. It achieves the effect of flexibly adjusting the collection space according to the growth height of rice and ensuring airtight sampling without damaging the plant.
[0018] 2. This utility model solves the problems of unstable equipment fixation and water level fluctuations eroding the equipment's interior caused by muddy paddy field environments through the combination structure of soil nails inserted at the bottom of the stabilizing plate and the overhead mounting plate on the top column. It enhances the device's grip stability in wetland environments and effectively prevents flooding, ensuring the long-term stable operation of the equipment. Attached Figure Description
[0019] Figure 1 This is a perspective view of a retractable rice greenhouse gas collection device proposed in this utility model.
[0020] Figure 2 This is a front view of a retractable rice greenhouse gas collection device proposed in this utility model;
[0021] Figure 3 This is a cross-sectional view of the inner shell of a retractable rice greenhouse gas collection device proposed in this utility model.
[0022] Figure 4 This is a split view of the inner shell of a retractable rice greenhouse gas collection device proposed in this utility model.
[0023] Legend:
[0024] 1. Stabilizing plate; 2. Soil nail; 3. Rice piercing opening one; 4. Column; 5. Mounting plate; 6. Rice piercing opening two; 7. Inner shell; 8. Guide rail; 9. Outer shell; 10. Slide groove; 11. Hollow lifting column; 12. Air outlet pipe; 13. Air pump; 14. Connecting pipe. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. Example
[0026] Please refer to Figures 1 to 4This utility model provides a retractable rice greenhouse gas collection device, which aims to solve the structural defects of existing rice greenhouse gas collection devices, such as fixed height which cannot adapt to the rice growth cycle and the bottom of the device being eroded by rice paddy water flow.
[0027] Please refer to Figure 1 , Figure 2 and Figure 3 A retractable rice greenhouse gas collection device includes a stabilizing plate 1 and an mounting plate 5 fixedly connected above the stabilizing plate 1. The stabilizing plate 1 serves as the mounting base for the entire device to contact the paddy field soil, while the mounting plate 5 supports the gas collection components above. Soil-inserting nails 2 are fixedly connected to all four sides of the bottom of the stabilizing plate 1. The soil-inserting nails 2 extend vertically downward and are used to insert into the paddy field soil to anchor the device. Columns 4 are fixedly connected to all four sides of the top of the stabilizing plate 1. The columns 4 extend vertically upward and support the mounting plate 5. The same mounting plate 5 is fixedly connected to the top of each of the four columns 4. The mounting plate 5 is raised by the columns 4 to prevent the water surface fluctuations in the paddy field from affecting the structure above.
[0028] The inner shell 7 is fixedly connected to the top of the mounting plate 5. The inner shell 7 serves as the fixed part of the gas collection chamber. The outer shell 9 is slidably connected to the outer wall of the inner shell 7. The outer shell 9 serves as the movable adjustment part of the gas collection chamber. Guide rails 8 are fixedly connected to both the front and rear ends of the inner shell 7. Slide grooves 10 are opened inside the front and rear ends of the outer shell 9. The guide rails 8 are slidably embedded in the slide grooves 10. The movement trajectory of the outer shell 9 relative to the inner shell 7 is restricted by the cooperation between the guide rails 8 and the slide grooves 10, ensuring that the outer shell 9 can only rise and fall smoothly in the vertical direction.
[0029] Hollow lifting columns 11 are installed around the inner perimeter of the inner shell 7. The bottom of the hollow lifting columns 11 is fixedly connected to the top of the mounting plate 5, and the top of the hollow lifting columns 11 abuts against the top of the inner side of the outer shell 9. When the hollow lifting columns 11 are extended, they push the outer shell 9 to slide upward along the guide rail 8 to adjust the height of the collection space. Air outlet pipes 12 are connected to the top two sides of the outer shell 9. An air pump 13 is fixedly connected to the top of the air outlet pipes 12. The air inlet of the air pump 13 is connected to the air outlet pipe 12. A connecting pipe 14 is connected to the air outlet on the front side of the air pump 13. The connecting pipe 14 is used to transport the collected gas to the outside.
[0030] A retractable rice greenhouse gas collection device also includes a rice-passing opening 3 that is opened through the center of the top of the stabilizing plate 1. The inner diameter of the rice-passing opening 3 is larger than the outer diameter of the rice plant roots to allow the plant to pass through without damage. A second rice-passing opening 6 is opened through the center of the mounting plate 5. The second rice-passing opening 6 is on the same axis as the first rice-passing opening 3 in the vertical direction. The rice plant can pass through the first rice-passing opening 3 and the second rice-passing opening 6 in sequence to enter the inner area of the inner shell 7.
[0031] Please refer to Figure 3 and Figure 4Sealing pads are fixedly connected to the bottom of the outer shell 9 and the sliding contact points between the inner wall of the outer shell 9 and the outer wall of the inner shell 7. The sealing pads are made of rubber material to have good elastic deformation ability. The sealing pads are tightly attached to the outer wall surface of the inner shell 7 to fill the tiny gaps generated when the outer shell 9 and the inner shell 7 slide relative to each other, ensuring that the collection space enclosed by the inner shell 7 and the outer shell 9 remains airtight during the dynamic height adjustment process and the static collection process.
[0032] Both the inner shell 7 and the outer shell 9 are made of transparent acrylic sheet material to facilitate observation of the internal situation and ensure light transmission. The inner shell 7 is fixedly connected to the front and rear ends of the two sides. The outer shell 9 has sliding grooves 10 on the front and rear sides. The guide rails 8 are slidably engaged in the sliding grooves 10. The guide rails 8 and the sliding grooves 10 cooperate to restrict the outer shell 9 to move only in the vertical direction. Hollow lifting columns 11 are installed around the inner side of the inner shell 7. The bottom of the hollow lifting columns 11 is fixedly connected to the top of the mounting plate 5. The top of the hollow lifting columns 11 abuts against the top of the inner side of the outer shell 9. The extension and retraction of the hollow lifting columns 11 directly drives the outer shell 9 to rise and fall smoothly along the guide rails 8 under the guidance of the sliding grooves 10.
[0033] As a preferred embodiment, please refer to Figure 1 and Figure 2 The bottom of the stabilizing plate 1 is fixedly connected with soil-inserting nails 2 on all four sides. The bottom of the soil-inserting nails 2 adopts a conical pointed structure design. The conical pointed structure can effectively reduce the resistance when inserted into the paddy field soil. The soil-inserting nails 2 extend vertically downward to increase the grip of the device. The stabilizing plate 1 and the soil-inserting nails 2 work together to prevent the device from tipping over when impacted by wind and water flow.
[0034] Please refer to Figure 3 A rice-passing opening 3 is provided at the center of the top of the stabilizing plate 1. The inner diameter of the rice-passing opening 3 is designed to be larger than the outer diameter of the rice plant root. A second rice-passing opening 6 is provided at the center of the mounting plate 5. The second rice-passing opening 6 is on the same axis as the first rice-passing opening 3 in the vertical direction. The coaxial arrangement of the first rice-passing opening 3 and the second rice-passing opening 6 ensures that the rice plant can pass through smoothly and enter the inner shell 7, avoiding mechanical damage to the plant stems and leaves caused by the device structure.
[0035] Please refer to Figure 3 and Figure 4 A sealing ring is fixedly connected at the sliding contact point between the inner wall of the outer shell 9 and the outer wall of the inner shell 7. The sealing ring is made of highly elastic rubber material. The rubber sealing ring is tightly attached to the outer wall surface of the inner shell 7 to eliminate sliding gaps. Both the inner shell 7 and the outer shell 9 are made of transparent acrylic board material to facilitate observation of the internal rice growth and equipment operation status from the outside. The column 4 and the soil nail 2 are both made of stainless steel material to improve corrosion resistance in humid environments.
[0036] Please refer to Figure 1The air pump 13 installed on the top of the outer casing 9 is preferably a KNFNMP830KNDC. The flow rate of the air pump 13 is set to 0.5 to 5 L / min, and the working pressure range of the air pump 13 is controlled to 0.1 to 0.5 MPa. The connecting pipe 14 connected to the front of the air pump 13 has a connecting joint at the end away from the air pump 13. The connecting joint is used to quickly and tightly connect the external gas storage device and the gas analysis instrument to ensure that the collected greenhouse gas can be transmitted without leakage.
[0037] Working principle:
[0038] When in use, the stabilizing plate 1 is inserted into the paddy field soil through the soil nail 2, so that the rice penetration opening 1 3 and the rice penetration opening 2 6 are aligned with the rice plants. The rice plants pass through the rice penetration opening 1 3 and the rice penetration opening 2 6 in sequence and enter the sealed space formed by the inner shell 7 and the outer shell 9. The stabilizing plate 1 and the soil nail 2 fix and strengthen the stability of the equipment in the paddy field soil. The support column 4 and the mounting plate 5 increase the height of the equipment to prevent water flow from eroding the internal structure of the equipment. The rice penetration opening 1 3 and the rice penetration opening 2 6 facilitate the entry of rice plants into the equipment and avoid damage to the rice plants during the installation process.
[0039] The hollow lifting column 11 is activated according to the growth height of the rice plants. The top of the hollow lifting column 11 abuts against the top of the inner side of the outer shell 9, pushing the outer shell 9 to slide upward along the guide rail 8 on the outer wall of the inner shell 7 inside the slide groove 10. The relative height between the outer shell 9 and the inner shell 7 is adjusted so that the bottom of the outer shell 9 is at a suitable distance from the water surface of the paddy field. The hollow lifting column 11, together with the guide rail 8 and the slide groove 10, slides to realize the height adjustment function of the outer shell 9. The sealing soft pad keeps the airtightness between the inner shell 7 and the outer shell 9 to prevent gas leakage in the closed space and ensure the accuracy of gas collection.
[0040] Turning off the air pump 13 causes the greenhouse gas concentration in the sealed space formed by the inner shell 7 and the outer shell 9 to change over time. After a preset time, the air pump 13 is turned on. The air pump 13 draws gas from the sealed space through the gas outlet pipe 12 and then transports the gas to the external gas storage device through the connecting pipe 14 to collect gas data in the sealed space in real time.
Claims
1. A retractable greenhouse gas collection device for rice cultivation, comprising: A stabilizing plate (1) is fixedly connected to four columns (4) on the top of the stabilizing plate (1). The top of the four columns (4) is fixedly connected to the same mounting plate (5). The top of the mounting plate (5) is fixedly connected to an inner shell (7). The inner shell (7) is characterized in that guide rails (8) are fixedly connected to both the front and rear ends of the inner shell (7), and an outer shell (9) is slidably connected to the outer wall of the inner shell (7). Slide grooves (10) are opened inside the front and rear sides of the outer shell (9). The guide rails (8) are slidably connected inside the slide grooves (10). Hollow lifting columns (11) are installed around the inner side of the inner shell (7). The bottom of the hollow lifting column (11) is fixedly connected to the top of the mounting plate (5). The top of the hollow lifting column (11) abuts against the top of the inner side of the outer shell (9). Air outlet pipes (12) are connected to both sides of the top of the outer shell (9). An air pump (13) is fixedly connected to the top of the air outlet pipe (12). A connecting pipe (14) is connected to the front side of the air pump (13). A sealing pad is fixedly connected to the bottom of the outer shell (9).
2. The retractable rice greenhouse gas collection device according to claim 1, characterized in that, The bottom of the stabilizing plate (1) is fixedly connected with soil nails (2) on all four sides, and the bottom end of the soil nails (2) is designed with a conical pointed structure.
3. The retractable rice greenhouse gas collection device according to claim 1, characterized in that, The top center of the stabilizing plate (1) is provided with a rice-penetrating opening (3), the inner diameter of which is larger than the outer diameter of the rice plant root.
4. The retractable rice greenhouse gas collection device according to claim 1, characterized in that, The center of the mounting plate (5) is provided with a second rice-passing opening (6), which is on the same axis as the first rice-passing opening (3) in the vertical direction.
5. A retractable rice greenhouse gas collection device according to claim 1, characterized in that, The pump body of the air pump (13) is made of corrosion-resistant engineering plastic and 304 stainless steel.
6. A retractable rice greenhouse gas collection device according to claim 1, characterized in that, A sealing ring is fixedly connected at the sliding contact point between the inner wall of the outer shell (9) and the outer wall of the inner shell (7), and the sealing ring is made of rubber.
7. A retractable rice greenhouse gas collection device according to claim 1, characterized in that, The end of the connecting pipe (14) away from the air pump (13) is provided with a connecting joint, which is used to connect to an external air storage device.
8. A retractable rice greenhouse gas collection device according to claim 1, characterized in that, The inner shell (7) and the outer shell (9) are both made of transparent acrylic sheet, and the column (4) and the soil nail (2) are both made of stainless steel.