Gas collecting device for collecting breathing gas of plants and soil

Abstract

The invention discloses a gas collecting device for collecting plant and soil breathing gas, which comprises a chassis, the outer side of the upper part of the chassis is sleeved with a telescopic flexible sealing gas collecting bag, the outer side of the lower end part of the flexible sealing gas collecting bag is provided with a first hoop corresponding to the outer side of the chassis, and the inner side of the upper end part of the flexible sealing gas collecting bag is provided with a top cover; a second hoop is arranged on the outer side of the upper end part of the flexible sealing gas collecting bag corresponding to the outer side of the top cover; in use, assembly is convenient, disassembly is easy after use, field assembly is convenient, and operation can be conducted by a single person; the telescopic flexible sealing air collecting bag is adopted, so that the advantage of being convenient to carry is achieved; the telescopic flexible sealed gas collection bag is adopted, so that the height can be adjusted, and the problem of difficult measurement caused by different heights of vegetation plants is solved; under the action of the bracket and the airtight material, the effects of firmness, durability, water prevention, sand prevention and good sealing condition are achieved; manufacturing materials are cheap and easy to obtain, and the manufacturing cost is low.

Description

Technical Field

[0001] The invention belongs to the technical field of soil respiration and plant respiration measurement experimental tools, and in particular relates to a gas collecting device for collecting plant and soil respiration gases. Background Art

[0002] In the field of ecological environment and agricultural production, the collection of soil and vegetation respiratory gases is of great significance for studying the carbon balance of soil and vegetation ecosystems, monitoring soil microbial activity and plant physiological characteristics, and evaluating soil fertility. By analyzing the composition and content of respiratory gases of different organisms, we can understand the physiological and ecological conditions of soil, vegetation and microorganisms, and provide a scientific basis for ecological protection and agricultural production.

[0003] With the advancement of ecological civilization construction and the implementation of the "dual carbon" strategy, the demand for monitoring greenhouse gases, volatile organic compounds (VOCs) and other gases in soil and vegetation in ecosystems is increasing. The emission and content changes of these gases have a significant impact on the ecological environment and human health.

[0004] Patent CN218674417U discloses a soil gas active collection device, which reduces the operation steps and further improves the work efficiency of soil gas collection. However, since the device is large and heavy and cannot be disassembled, it is inconvenient to carry and store. In addition, the use environment of the device is limited. When collecting breath gas from the soil on the slope, there is no positioning structure to position it, which will lead to poor stability of the device and even instability.

[0005] Patent CN215727118U discloses a gas collection box for sampling gas released by plants. After the initial assembly for collection, subsequent collection only requires opening and closing the waterproof and airtight zipper during disassembly and assembly, without the need to consume manpower for each disassembly and assembly. However, the height of the device cannot be adjusted, and the heights of plants are different. If the respiratory gas of plants with a higher height is collected, the plant cannot be completely surrounded, resulting in difficulty in collection. If the respiratory gas of plants with a lower height is collected, it will take a longer time to evenly diffuse the gas in the semi-ellipsoidal waterproof and airtight cloth cover, which will reduce the collection efficiency.

[0006] Patent CN108072548A discloses a plant VOCs gas collection device. When in use, the depth of the legs inserted into the soil can be easily adjusted to adjust the levelness, thereby ensuring the airtightness of the entire sampling device. Although the device can adjust the height of the gas collecting box, the height of the gas collecting box is adjusted by adding an additional box body. This adjustment method cannot effectively adjust the height of the gas collecting box to a position corresponding to the height of the plant. At the same time, when carrying the device, it is inconvenient to carry due to the large number of components. Summary of the invention

[0007] The purpose of the present invention is to solve the problems in the prior art that it is inconvenient to carry, inconvenient to assemble and inconvenient to adjust, and to provide a gas collecting device for collecting respiratory gases of plants and soil. The gas collecting device is used to collect the respiratory gases of plants (including the soil in which plants are planted) or to collect the respiratory gases of soil.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A gas collecting device for collecting respiratory gas from plants and soil comprises a chassis, a retractable flexible sealed gas collecting bag is sleeved on the outer side above the chassis, a first clamp is arranged on the outer side of the lower end of the flexible sealed gas collecting bag corresponding to the outer side of the chassis, a top cover is arranged on the inner side of the upper end of the flexible sealed gas collecting bag, and a second clamp is arranged on the outer side of the upper end of the flexible sealed gas collecting bag corresponding to the outer side of the top cover; a manual valve is connected to the middle part above the top cover, an air collecting pipe is connected to the inner side of the upper end of the manual valve, the air collecting pipe is composed of a U-shaped hard pipe and a soft pipe, the hard pipe is connected to the manual valve, and a fan is connected to the inner side of the top cover.

[0010] Preferably, a bracket is connected above the outer side of the top cover, and the bracket consists of a fixing ring and three support rods. The three support rods are arranged in a circular array outside the fixing ring so that the three support rods are arranged in an equilateral triangle.

[0011] Preferably, the diameter of the flexible sealed air collecting bag is 10cm-40cm, and the height adjustment range of the flexible sealed air collecting bag is 20cm-80cm.

[0012] Preferably, the flexible sealed air collection bag is made of canvas, and the inside and outside of the flexible sealed air collection bag are lined with airtight material.

[0013] Preferably, the bottom plate, the flexible sealed air collecting bag and the top cover are all in the shape of a ring.

[0014] Preferably, the lower end of the support rod is tapered.

[0015] Preferably, the support rod forms an angle of 100° with the horizontal plane.

[0016] Preferably, the top cover, the bottom plate, the bracket, the No. 1 clamp and the No. 2 clamp are all made of 304 stainless steel; the manual valve and the bracket are welded to the top cover by argon arc welding.

[0017] Preferably, the steps for the gas collecting device to collect respiratory gas from soil are: dig out a ring with a diameter of 10cm-40cm, and adjust the height of the flexible sealed gas collecting bag according to the height of the soil sample to be tested, start the fan after the adjustment is completed, and fix the flexible sealed gas collecting bag to the outside of the top cover and the chassis through the first clamp and the second clamp. After the flexible sealed gas collecting bag is fixed, cover the device above the soil sample to be tested, insert the chassis into the ring, and insert the support rod into the soil, bury the chassis with moist soil, at this time, ensure that the manual valve is in the closed state, and let the sample respiratory gas be collected at rest. After a certain period of time, the manual valve can be opened to sample the gas through the gas collecting pipe.

[0018] Preferably, the steps for the gas collecting device to collect respiratory gas from plants are: dig out a ring with a diameter of 10cm-40cm, and adjust the height of the flexible sealed gas collecting bag according to the height of the soil and vegetation samples to be tested, start the fan after the adjustment is completed, and fix the flexible sealed gas collecting bag to the outside of the top cover and the chassis through the first clamp and the second clamp. After the flexible sealed gas collecting bag is fixed, cover the device above the plant sample to be tested, insert the chassis into the ring, and insert the support rod into the soil, bury the chassis with moist soil, at this time, ensure that the manual valve is in the closed state, and let the sample respiratory gas be collected at rest. After a certain period of time, the manual valve can be opened to sample the gas through the gas collecting pipe.

[0019] Beneficial effects of the present invention:

[0020] 1) It is easy to assemble during use and easy to dismantle after use, easy to carry, easy to assemble in the field, and can be operated by one person.

[0021] 2) The retractable flexible sealed air collecting bag is adopted, which has the advantage of being easy to carry.

[0022] 3) The use of a retractable flexible sealed air collection bag makes the height adjustable, solving the measurement difficulties caused by different plant heights.

[0023] 4) Under the action of the bracket and the airtight material, it plays a role of being strong and durable, waterproof and sand-proof, and has good sealing conditions.

[0024] 5) The production materials are cheap and easy to obtain, and the production cost is low.

[0025] 6) Applicable to a variety of soil environments, with basically no requirements on soil conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 is a stereogram of the present invention;

[0028] Figure 2 is a front view of the present invention;

[0029] Figure 3 is an exploded view of the present invention;

[0030] Figure 4 is a three-dimensional diagram of the flexible sealed air collection bag of the present invention;

[0031] Figure 5 is a three-dimensional diagram of the chassis of the present invention;

[0032] Figure 6 is a three-dimensional diagram of the top cover of the present invention;

[0033] Figure 7 is a three-dimensional diagram of the first clamp in the present invention;

[0034] Figure 8 is a three-dimensional diagram of the bracket in the present invention;

[0035] Fig. 9 is a three-dimensional diagram of a manual valve in the present invention;

[0036] Fig.10 It is a stereoscopic view of the gas collecting pipe in the present invention.

[0037] In the figure: 1. chassis; 2. flexible sealing air collecting bag; 3. top cover; 4. ring; 5. manual valve; 6. air collecting pipe; 7. fan;

[0038] 21. First clamp; 31. Second clamp; 41. Support rod. DETAILED DESCRIPTION

[0039] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1 - Fig.10 As shown, a gas collecting device for collecting respiratory gas from plants and soil includes a chassis 1 with openings at both ends for connecting the lower end of a flexible sealed gas collecting bag 2 and sealing the flexible sealed gas collecting bag 2 through a first clamp 21.

[0041] A retractable flexible sealed air collecting bag 2 is sleeved on the outer side above the chassis 1. Both ends of the flexible sealed air collecting bag 2 are opened for collecting the respiratory gas of plants and soil.

[0042] A manual valve 5 is connected to the middle part above the top cover 3, and an air collecting pipe 6 is connected to the interior of the upper end of the manual valve 5. The air collecting pipe 6 is composed of a U-shaped hard pipe and a soft pipe, and the hard pipe 6 is connected to the manual valve 5; a fan 7 is connected to the inside of the top cover 3, and a bracket is connected to the upper outer side of the top cover 3, and the bracket is composed of a fixing ring 4 and three support rods 41. The three support rods 41 are arranged in a circular array on the outer side of the fixing ring 4, so that the three support rods 41 are arranged in an equilateral triangle.

[0043] The diameter of the flexible sealed air collecting bag 2 is 10cm-40cm, and the height adjustment range of the flexible sealed air collecting bag 2 is 20cm-80cm.

[0044] The flexible sealed air collection bag 2 is made of canvas, and the inside and outside of the flexible sealed air collection bag 2 are lined with airtight materials, and the airtight materials include plastic film or rubber but are not limited to plastic film or rubber. Through this setting, the following benefits can be obtained: 1. The canvas has good strength and wear resistance, and can withstand certain external forces and pressures, ensuring that the air collection bag will not break or deform during the collection process;

[0045] Second, the airtight material can ensure the sealing performance of the flexible sealed gas collection bag 2, and can effectively prevent gas leakage, thereby ensuring the purity and accuracy of the collected gas sample;

[0046] 3. The combination of canvas and plastic film or rubber makes the air collection bag more durable and tear-resistant, and can adapt to various complex collection environments and conditions;

[0047] Fourth, airtight materials can block impurities, moisture and other pollutants in the outside air, thus ensuring that the collected gas samples are not contaminated;

[0048] 5. The sealing performance of the airtight material can keep the gas in the flexible sealed gas collection bag 2 stable and will not change significantly due to changes in the external environment. It helps to maintain the original state of the gas sample for a long time after collection, which is convenient for subsequent analysis and research.

[0049] A first clamp 21 is provided on the outer side of the lower end of the flexible sealed air collecting bag 2 corresponding to the outer side of the chassis 1 . The first clamp 21 is used to fix the lower end of the flexible sealed air collecting bag 2 and seal the flexible sealed air collecting bag 2 on the outer side of the chassis 1 .

[0050] A top cover is provided inside the upper end of the flexible sealed air collecting bag 2 , and the top cover is used to connect the upper end of the flexible sealed air collecting bag 2 and seal the flexible sealed air collecting bag 2 through the second clamp 31 .

[0051] A second clamp 31 is provided on the outer side of the upper end of the flexible sealed air collecting bag 2 corresponding to the outer side of the top cover. The second clamp 31 is used to fix the upper end of the flexible sealed air collecting bag 2 and seal the flexible sealed air collecting bag 2 on the outer side of the top cover.

[0052] The chassis 1, the flexible sealed gas collection bag 2 and the top cover are all in a circular shape. This arrangement can provide the following benefits: First, the internal space of the device can be maximized while occupying the same area, thereby collecting more gas samples and improving collection efficiency.

[0053] Second, it is easier to achieve a tight seal and reduce the risk of gas leakage. When collecting respiratory gases from plants and soil, preventing gas leakage is the key to ensuring sample purity and accuracy. The circular ring design enables the flexible sealed gas collection bag 2 to fit more easily and tightly on the outside of the bottom plate 1 and the lower plate, thereby improving the sealing performance;

[0054] 3. It can reduce processing difficulty and manufacturing cost, reduce cost and improve production efficiency;

[0055] Fourth, it helps to optimize the airflow distribution and reduce the turbulence and eddy currents inside the device, which can ensure that the gas sample can flow evenly and stably during the collection process, thereby improving the accuracy and reliability of the collection.

[0056] A bracket is connected to the top of the outer side of the top cover. The bracket consists of a fixing ring 4 and three support rods 41. The three support rods 41 are arranged in a circular array on the outer side of the fixing ring 4 so that the three support rods 41 are arranged in an equilateral triangle. This arrangement can provide the following benefits: First, the triangle is a very stable geometric shape with high structural strength and rigidity. When subjected to external force, the triangular structure can effectively disperse and resist the external force, thereby maintaining overall stability;

[0057] Second, compared with more support rods 41, three support rods 41 can save materials and costs while maintaining the same stability, which helps to reduce production costs and environmental pollution.

[0058] The lower end of the support rod 41 is tapered. This arrangement makes it easy to insert the support rod 41 into the soil to support the device.

[0059] The support rod 41 forms an angle of 100° with the horizontal plane. This arrangement can provide the following benefits: 1. It can effectively disperse the pressure on the support, which helps to reduce the load on each support rod 41, thereby improving the stability of the entire support;

[0060] Second, it can generate a moment to resist overturning, which helps to maintain the balance of the bracket and prevent it from overturning due to uneven force;

[0061] 3. When the bracket is subjected to external force, the angle between the support rod 41 and the horizontal plane can produce a certain elastic deformation, thereby absorbing and dispersing part of the energy and reducing the overall deformation of the bracket;

[0062] Fourth, when the bracket bears the same weight, less material is required and the structure is more compact, which not only reduces the production cost but also improves the bearing capacity of the bracket.

[0063] The top cover, the bottom plate 1 , the bracket, the first clamp 21 and the second clamp 31 are all made of 304 stainless steel.

[0064] A manual valve 5 is connected to the middle part above the top cover, and the manual valve 5 is used to control the flow of gas.

[0065] The manual valve 5 and the bracket are welded to the top cover by argon arc welding.

[0066] The upper end of the manual valve 5 is internally connected with a gas collecting pipe 6 for assisting in collecting the respiratory gas of plants and soil.

[0067] The gas collecting pipe is composed of a U-shaped hard pipe and a soft pipe, and the hard pipe is connected to the manual valve. This setting can prevent the gas collecting pipe from bending due to gravity. The bending of the gas collecting pipe will affect the flow of gas when sampling the gas, thereby reducing the gas sampling efficiency. At the same time, this setting can keep the gas collecting pipe away from the manual valve, thereby not hindering the use of the manual valve.

[0068] A fan 7 is connected to the inside of the top cover to mix the air inside the device to reduce measurement errors.

[0069] Working principle: Before collecting the mixed breathing gas of soil and plants or the breathing gas of soil, use tools to dig out a ring with a diameter of 10cm-40cm according to the requirements of the soil sample to be tested or the plant sample to be tested, and adjust the height of the flexible sealed air collection bag 2 according to the height of the soil sample to be tested or the plant sample to be tested. After the adjustment is completed, start the fan 7, and fix the flexible sealed air collection bag 2 to the outside of the top cover and the bottom plate 1 through the first clamp 21 and the second clamp 31. After the flexible sealed air collection bag 2 is fixed, cover the device above the soil sample to be tested or the plant sample to be tested, insert the bottom plate 1 into the ring, and insert the support rod 41 into the soil, and cover it with moist soil. The chassis 1 is buried, and the manual valve 5 is ensured to be in the closed state. After a certain period of static time (0.5-2h), the manual valve 5 can be opened to sample the gas through the gas collecting pipe 6. The device is firstly cheap and easy to obtain in terms of manufacturing materials, and the manufacturing cost is low. Then, it is easy to assemble during use and easy to dismantle after use, which embodies the advantages of being easy to carry, easy to assemble in the field, and can be operated by one person. More importantly, the height is adjustable by adopting a retractable flexible sealed gas collecting bag 2, which solves the problem of measurement difficulties caused by different plant heights. In addition, under the action of the bracket and the airtight material, it is strong and durable, waterproof and sandproof, and has good sealing conditions.

[0070] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas collecting device for collecting respiratory gas from plants and soil, characterized in that: The invention comprises a chassis (1), wherein both ends of the chassis (1) are open, a retractable flexible sealed air collecting bag (2) is sleeved on the upper outer side of the chassis (1), a first clamp (21) is arranged on the outer side of the lower end of the flexible sealed air collecting bag (2) corresponding to the outer side of the chassis (1), a top cover (3) is arranged on the inner side of the upper end of the flexible sealed air collecting bag (2), and a second clamp (31) is arranged on the outer side of the upper end of the flexible sealed air collecting bag (2) corresponding to the outer side of the top cover (3); A manual valve (5) is connected to the middle of the top cover (3), and an air collecting pipe (6) is connected to the upper end of the manual valve (5). The air collecting pipe (6) is composed of a U-shaped hard pipe and a soft pipe, and the hard pipe (6) is connected to the manual valve (5); The top cover (3) is internally connected to a fan (7).

2. A gas collecting device for collecting respiratory gas from plants and soil according to claim 1, characterized in that: A bracket is connected to the upper part of the outer side of the top cover (3), and the bracket is composed of a fixing ring (4) and three supporting rods (41). The three supporting rods (41) are arranged in a circular array outside the fixing ring (4), so that the three supporting rods (41) are arranged in an equilateral triangle.

3. A gas collecting device for collecting respiratory gas from plants and soil according to claim 2, characterized in that: The diameter of the flexible sealed air collection bag (2) is 10 cm-40 cm, and the height adjustment range of the flexible sealed air collection bag (2) is 20 cm-80 cm.

4. A gas collecting device for collecting respiratory gas from plants and soil according to claim 3, characterized in that: The flexible sealed air collection bag (2) is made of canvas, and the inside and outside of the flexible sealed air collection bag (2) are lined with airtight material.

5. The gas collecting device for collecting respiratory gas from plants and soil according to claim 4, characterized in that: The bottom plate (1), the flexible sealed air collecting bag (2) and the top cover (3) are all in the shape of a circular ring.

6. A gas collecting device for collecting respiratory gas from plants and soil according to claim 5, characterized in that: The lower end of the support rod (41) is tapered.

7. A gas collecting device for collecting respiratory gas from plants and soil according to claim 6, characterized in that: The support rod (41) forms an angle of 100° with the horizontal plane.

8. The gas collecting device for collecting respiratory gas from plants and soil according to claim 7, characterized in that: The top cover (3), the bottom plate (1), the bracket, the first clamp (21) and the second clamp (31) are all made of 304 stainless steel; the manual valve (5) and the bracket are welded to the top cover (3) by argon arc welding.

9. The gas collecting device for collecting respiratory gas from plants and soil according to claim 1, characterized in that: The gas collection device collects breathable gas from soil in the following steps: digging out a circular ring (4) with a diameter of 10 cm to 40 cm; adjusting the height of the flexible sealed gas collection bag (2) according to the height of the soil sample to be tested; starting the fan (7) after the adjustment is completed, and fixing the flexible sealed gas collection bag (2) to the outside of the top cover (3) and the bottom plate (1) through the first clamp (21) and the second clamp (31); after the flexible sealed gas collection bag (2) is fixed, the device is covered above the soil sample to be tested, the bottom plate (1) is inserted into the circular ring (4), and the support rod (41) is inserted into the soil, and the bottom plate (1) is buried with moist soil. At this time, the manual valve (5) must be closed, and the sample breathable gas is collected at rest. After a certain period of time, the manual valve (5) can be opened to sample the gas through the gas collection pipe (6).

10. The gas collecting device for collecting respiratory gas from plants and soil according to claim 1, characterized in that: The gas collection device collects the respiratory gas of plants in the following steps: digging out a circular ring (4) with a diameter of 10 cm to 40 cm; adjusting the height of the flexible sealed gas collection bag (2) according to the height of the soil and plant samples to be tested; starting the fan (7) after the adjustment is completed, and fixing the flexible sealed gas collection bag (2) on the outside of the top cover (3) and the bottom plate (1) through the first clamp (21) and the second clamp (31); after the flexible sealed gas collection bag (2) is fixed, the device is covered above the plant sample to be tested, the bottom plate (1) is inserted into the circular ring (4), and the support rod (41) is inserted into the soil, and the bottom plate (1) is buried with moist soil. At this time, the manual valve (5) must be closed, and the sample respiratory gas is collected at rest. After a certain period of time, the manual valve (5) can be opened to sample the gas through the gas collection pipe (6).

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