A static box structure and a static box greenhouse gas mixing and stirring device

Abstract

The application discloses a static box greenhouse gas mixing and stirring device and a static box structure, which comprises a center gear shaft, a hemispherical center gear, a fixing frame, a planetary gear shaft, a hemispherical planetary gear and a fan impeller; the hemispherical center gear is fixedly connected to the center gear shaft, a plurality of planetary gear shafts are circumferentially arranged on the outer side of the hemispherical center gear, and one hemispherical planetary gear meshing with the hemispherical center gear is fixedly connected to each planetary gear shaft; the fan impeller is connected to each planetary gear shaft; each planetary gear shaft and the center gear shaft are drivingly connected through one transmission assembly respectively, each transmission assembly is connected to one angle adjusting mechanism, the first incomplete gear in the transmission assembly can be driven to reciprocate around the second incomplete gear through the angle adjusting mechanism, and the meshing angle of the hemispherical planetary gear and the hemispherical center gear is adjusted. The application can better ensure the accuracy, authenticity and timeliness of gas sampling.

Description

Technical Field

[0001] This invention relates to the field of greenhouse gas collection technology, and in particular to a greenhouse gas mixing and stirring device in a static box and the structure of the static box. Background Technology

[0002] To promote in-depth research into the emission patterns of greenhouse gases (mainly methane, carbon dioxide, and nitrous oxide) from farmland, and to help researchers better simulate future carbon emissions and sinks in farmland, thereby better guiding farmers to adjust farmland management practices and planting patterns, the aim is to minimize greenhouse gas emissions while ensuring or even increasing yields, thus achieving green and sustainable agricultural development. Currently, the study of greenhouse gas emissions from farmland mainly involves processes such as gas collection, determination of gas composition and concentration, and chemical analysis. In the gas collection stage, static chambers are currently commonly used to collect greenhouse gases including methane, carbon dioxide, and nitrous oxide.

[0003] The fan in the static chamber plays a crucial role in agitating the gases and increasing the uniformity of mixing methane, carbon dioxide, and nitrous oxide. The higher the uniformity of mixing these three gases, the more representative the greenhouse gas sample extracted through the sampling pipe will be. This leads to more accurate measurements of the composition and content of various gases using gas chromatography, and ultimately, results that better represent the true greenhouse gas emissions of the field. However, currently, the static chamber almost exclusively uses a single fan for agitation. The fan's speed and spatial position cannot be changed, resulting in a prolonged initial sampling period to ensure the gases in the static chamber are mixed as evenly as possible. Due to the extended time spent before sampling and the enclosed space of the chamber, as time progresses and the gases achieve a certain degree of mixing, the measured results at this point already show a certain degree of deviation from the true values ​​to be measured at the original time point. Therefore, to ensure that the collected and measured gas values ​​are more accurate and effective, it is necessary and urgent to improve the design and refinement of the agitator (fan) in the static chamber. Summary of the Invention

[0004] The purpose of this invention is to provide a greenhouse gas mixing and stirring device and static box structure in a static box, which can effectively solve the problems of slow gas mixing speed, poor uniformity and time-consuming process in static boxes, and better ensure the accuracy, authenticity and timeliness of gas sampling.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] The present invention provides a greenhouse gas mixing and stirring device in a static chamber, comprising a central gear shaft, a hemispherical central gear, a fixed frame, a planetary gear shaft, a hemispherical planetary gear, and a fan impeller;

[0007] The hemispherical central gear is fixedly connected to the central gear shaft. Multiple planetary gear shafts are provided circumferentially on the outer side of the hemispherical central gear. A hemispherical planetary gear is fixedly connected to each planetary gear shaft. Each hemispherical planetary gear meshes with the hemispherical central gear. A fan impeller is fixedly connected to each planetary gear shaft.

[0008] Each of the planetary gear shafts is connected to the central gear shaft via a transmission assembly. The transmission assembly includes a first connector, a first incomplete gear, a second connector, and a second incomplete gear. One end of the first connector is fixedly connected to a first sleeve, and the other end is fixedly connected to the first incomplete gear. The first sleeve is sleeved on the planetary gear shaft and is axially fixed relative to the planetary gear shaft. One end of the second connector is fixedly connected to a second sleeve, and the other end is fixedly connected to the second incomplete gear. The second sleeve is sleeved on the central gear shaft and is axially fixed relative to the central gear shaft. The first incomplete gear meshes with the second incomplete gear.

[0009] Each of the transmission components is connected to an angle adjustment mechanism, which is connected to the fixed frame. The angle adjustment mechanism can drive the first incomplete gear to reciprocate around the second incomplete gear, thereby adjusting the meshing angle between the hemispherical planetary gear and the hemispherical central gear.

[0010] Preferably, the angle adjustment mechanism includes a crank, a connecting rod, a slider, and a guide rail. The guide rail is fixedly connected to the fixed frame and to the second connecting member. The slider is slidably connected to the guide rail. One end of the connecting rod is rotatably connected to the slider, and the other end is rotatably connected to the crank. One end of the crank is rotatably connected to the gear shaft of the first incomplete gear, and the other end is rotatably connected to the gear shaft of the second incomplete gear. By driving the slider to reciprocate along the guide rail, the first incomplete gear is driven to reciprocate around the second incomplete gear via the transmission of the connecting rod and the crank, thereby adjusting the meshing angle between the hemispherical planetary gear and the hemispherical central gear.

[0011] Preferably, there are three planetary gear shafts, which are evenly distributed circumferentially along the central gear shaft.

[0012] Preferably, the fixing frame is a triangular fixing frame, and each of the three apex positions of the fixing frame is fixedly connected to a guide rail.

[0013] Preferably, it further includes a drive motor, the output shaft of which is connected to the central gear shaft for driving the central gear shaft to rotate.

[0014] The present invention also provides a static box structure, including a static box body and a greenhouse gas mixing and stirring device in the static box as described above. The top of the central gear shaft is rotatably connected to the box cover on the top of the static box body. The fixing frame is fixedly connected to the static box body. Each of the fan impellers is respectively disposed at the lower end of each of the planetary gear shafts and located in the static box body.

[0015] Preferably, the central gear shaft is connected to the output shaft of the drive motor, and the drive motor is fixedly connected to the cover on the top of the static housing.

[0016] The present invention achieves the following technical effects compared to the prior art:

[0017] The greenhouse gas mixing and stirring device and static box structure provided by this invention can drive the fan impellers to rotate by driving the central gear shaft. The gas inside the static box is stirred and mixed. The angle adjustment mechanism drives the first incomplete gear to reciprocate around the second incomplete gear, which can adjust the meshing angle between the hemispherical planetary gear and the hemispherical central gear, thereby changing the spatial rotation angle of the fan impellers. This improves the mixing and stirring effect of greenhouse gases in the closed space of the static box, achieving the purpose of rapid, comprehensive and uniform gas mixing, and better ensuring the accuracy, authenticity and timeliness of gas sampling. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the greenhouse gas mixing and stirring device in the static box provided by the present invention;

[0020] Figure 2 This is a schematic diagram of the connection structure between the transmission component and the angle adjustment mechanism in this invention;

[0021] Figure 3 This is a schematic diagram of the static box structure provided by the present invention.

[0022] In the diagram: 1-Central gear shaft, 2-Hemispherical central gear, 3-Fixed frame, 4-Planetary gear shaft, 5-Hemispherical planetary gear, 6-Fan impeller, 7-First connecting piece, 8-First incomplete gear, 9-Second connecting piece, 10-Second incomplete gear, 11-Crank, 12-Connecting rod, 13-Slider, 14-Guide rail, 15-Static housing, 16-First sleeve, 17-Second sleeve. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The purpose of this invention is to provide a greenhouse gas mixing and stirring device and static box structure in a static box, which can effectively solve the problems of slow gas mixing speed, poor uniformity and time-consuming process in static boxes, and better ensure the accuracy, authenticity and timeliness of gas sampling.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1

[0027] like Figures 1-3 As shown, this embodiment provides a greenhouse gas mixing and stirring device in a static chamber, including a central gear shaft 1, a hemispherical central gear 2, a fixed frame 3, a planetary gear shaft 4, a hemispherical planetary gear 5, and a fan impeller 6;

[0028] A hemispherical central gear 2 is fixedly connected to a central gear shaft 1. Multiple planetary gear shafts 4 are provided circumferentially on the outer side of the hemispherical central gear 2. A hemispherical planetary gear 5 is fixedly connected to each planetary gear shaft 4. Each hemispherical planetary gear 5 meshes with the hemispherical central gear 2. A fan impeller 6 is fixedly connected to each planetary gear shaft 4.

[0029] Each planetary gear shaft 4 is connected to the central gear shaft 1 via a transmission assembly. The transmission assembly includes a first connecting member 7, a first incomplete gear 8, a second connecting member 9, and a second incomplete gear 10. One end of the first connecting member 7 is fixedly connected to the first sleeve 16, and the other end is fixedly connected to the first incomplete gear 8. The first sleeve 16 is sleeved on the planetary gear shaft 4 and is axially fixed relative to the planetary gear shaft 4. One end of the second connecting member 9 is fixedly connected to the second sleeve 17, and the other end is fixedly connected to the second incomplete gear 10. The second sleeve 17 is sleeved on the central gear shaft 1 and is axially fixed relative to the central gear shaft 1. The first incomplete gear 8 meshes with the second incomplete gear 10.

[0030] Each transmission component is connected to an angle adjustment mechanism, which is connected to the fixed frame 3. The angle adjustment mechanism can drive the first incomplete gear 8 to reciprocate around the second incomplete gear 10, thereby adjusting the meshing angle between the hemispherical planetary gear 5 and the hemispherical central gear 2.

[0031] In use, the fixing bracket 3 is fixed to the bottom of the box cover on the top of the static box 15, and the central gear shaft 1 is rotatably connected to the box cover on the top of the static box 15. The central gear shaft 1 is driven to rotate by the drive device, which drives each fan impeller 6 to rotate. The gas inside the static box 15 is stirred and mixed. The first incomplete gear 8 is driven to reciprocate around the second incomplete gear 10 by the angle adjustment mechanism. The meshing angle between the hemispherical planetary gear 5 and the hemispherical central gear 2 is adjusted, and the spatial rotation angle of the fan impeller 6 is changed, thereby improving the mixing and stirring effect of greenhouse gas in the sealed space of the static box, achieving the purpose of rapid, comprehensive and uniform gas mixing, and better ensuring the accuracy, authenticity and timeliness of gas sampling.

[0032] In this embodiment, the angle adjustment mechanism includes a crank 11, a connecting rod 12, a slider 13, and a guide rail 14. The guide rail 14 is fixedly connected to the fixed frame 3 and to the second connecting member 9. The slider 13 is slidably connected to the guide rail 14. One end of the connecting rod 12 is rotatably connected to the slider 13, and the other end is rotatably connected to the crank 11. One end of the crank 11 is rotatably connected to the gear shaft of the first incomplete gear 8, and the other end is rotatably connected to the gear shaft of the second incomplete gear 10. By driving the slider 13 to reciprocate along the guide rail 14, the first incomplete gear 8 is driven to reciprocate around the second incomplete gear 10 through the transmission of the connecting rod 12 and the crank 11, thereby realizing the adjustment of the meshing angle between the hemispherical planetary gear 5 and the hemispherical central gear 2. By setting up a slider-crank mechanism, the slider 13 is driven to move back and forth along the guide rail 14, which in turn drives the first incomplete gear 8 to move back and forth around the second incomplete gear 10. In turn, the meshing angle between the hemispherical planetary gear 5 and the hemispherical central gear 2 is changed through the first connecting piece 7. The structure is simple and easy to install.

[0033] In this embodiment, three planetary gear shafts 4 are provided, and the three planetary gear shafts 4 are evenly distributed around the central gear shaft 1. The number of planetary gear shafts 4 is not limited and can be set according to actual needs. During the installation of the hemispherical central gear 2 and the hemispherical planetary gears 5, the mounting positions of the hemispherical central gear 2 and the hemispherical planetary gears 5 on the shaft are positioned by snap rings.

[0034] In this embodiment, the fixing frame 3 is a triangular fixing frame, and a guide rail 14 is fixedly connected to each of the three apex positions of the fixing frame 3.

[0035] In this embodiment, a drive motor (not shown in the figure) is also included. The output shaft of the drive motor is connected to the central gear shaft 1 through a coupling and is used to drive the central gear shaft 1 to rotate.

[0036] Example 2

[0037] like Figures 1-3 As shown, this embodiment provides a static box structure, including a static box body 15 and a greenhouse gas mixing and stirring device in the static box as described in Embodiment 1. The top of the central gear shaft 1 is rotatably connected to the box cover on the top of the static box body 15. The fixing frame 3 is fixedly connected inside the static box body 15. Each fan impeller 6 is respectively set at the lower end of each planetary gear shaft 4 and located inside the static box body 15.

[0038] In this embodiment, the central gear shaft 1 is connected to the output shaft of the drive motor (not shown in the figure), and the drive motor is fixedly connected to the cover on the top of the static housing 15.

[0039] This embodiment introduces a hemispherical central gear 2 and three hemispherical planetary gears 5, requiring only one motor (power input) to achieve synchronous rotation of the three fan impellers 6. By setting up a slider-crank mechanism (slider 13, connecting rod 12, crank 11) and a pair of meshing incomplete gears (first incomplete gear 8 and second incomplete gear 10), by simply adjusting the vertical reciprocating motion of slider 13 on guide rail 14, the meshing angle between the hemispherical planetary gears 5 and the hemispherical central gear 2 can be changed sequentially through connecting rod 12, crank 11, the two incomplete gears, and the first connecting piece 7 (L-shaped connecting piece). This changes the spatial rotation angle of the fan impellers 6, improves the mixing and stirring effect of the fan impellers 6 on the gas, increases the mixing uniformity of greenhouse gases in the sealed space of the static chamber, and achieves the purpose of rapid, comprehensive, and uniform gas mixing.

[0040] This invention features a compact structure and diverse functions, allowing the stirring device to be installed in the location where a fan was originally installed inside the static tank cover. Furthermore, the principle of this invention is simple, making it suitable for use by farmers and researchers alike.

[0041] The following is a detailed usage process:

[0042] Before gas collection, the static chamber structure provided by this invention is placed in the field block where the gas to be collected is located. A small motor (not shown in the figure) can be connected to the central gear shaft 1. When the motor is started, it drives the hemispherical central gear 2 to rotate through the coupling. At this time, the hemispherical central gear 2 drives the three externally meshing hemispherical planetary gears 5 to rotate, which in turn drives the three fan impellers 6 to rotate. At this time, the gas inside the static chamber 15 begins to be stirred and mixed.

[0043] Subsequently, the driven slider 13 reciprocates along the guide rail 14 within a set stroke and at a given speed. Both the stroke and speed parameters can be set according to actual needs and specific scenarios. The driving device for slider 13 is not critical; an existing linear reciprocating drive mechanism is sufficient. For example, each slider 13 can be driven reciprocally by setting electric push rods. As for the driving method of slider 13, a simple microcontroller program can be used for control. The microcontroller controls each electric push rod, thereby controlling the reciprocating motion of slider 13. The microcontroller can be installed in a control box, which can be placed on the top of the outside of a static box cover (not shown in the figure). During the reciprocating motion of slider 13, when slider 13 moves in one direction, the transmission of connecting rod 12, crank 11 and two externally meshing incomplete gears drives the hemispherical planetary gear 5 to mesh with the hemispherical central gear 2 from its equatorial position to its extreme position (i.e., the highest position); after changing the direction of movement of slider 13, the hemispherical planetary gear 5 meshes with the hemispherical central gear 2 from its extreme position to its equatorial position, transforming the reciprocating motion of slider 13 into the arc reciprocating motion of hemispherical planetary gear 5 and hemispherical central gear 2. In this way, the rotation angle of fan impeller 6 in space (i.e., the angle with the ground) changes from the initial parallel (0°).

[0044] At this point, the stirring effect of the greenhouse gas in the static chamber 15 is improved, and its mixing uniformity is rapidly increased. Researchers can then begin gas collection. After gas collection is complete, the movement of slider 13 is stopped, and the motor at the central gear shaft 1 is turned off, completing the operation.

[0045] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A greenhouse gas mixing and stirring device in a static chamber, characterized in that: It includes a central gear shaft, a hemispherical central gear, a fixed frame, a planetary gear shaft, hemispherical planetary gears, and a fan impeller; The hemispherical central gear is fixedly connected to the central gear shaft. Multiple planetary gear shafts are provided circumferentially on the outer side of the hemispherical central gear. A hemispherical planetary gear is fixedly connected to each planetary gear shaft. Each hemispherical planetary gear meshes with the hemispherical central gear. A fan impeller is fixedly connected to each planetary gear shaft. Each of the planetary gear shafts is connected to the central gear shaft via a transmission assembly. The transmission assembly includes a first connector, a first incomplete gear, a second connector, and a second incomplete gear. One end of the first connector is fixedly connected to a first sleeve, and the other end is fixedly connected to the first incomplete gear. The first sleeve is sleeved on the planetary gear shaft and is axially fixed relative to the planetary gear shaft. One end of the second connector is fixedly connected to a second sleeve, and the other end is fixedly connected to the second incomplete gear. The second sleeve is sleeved on the central gear shaft and is axially fixed relative to the central gear shaft. The first incomplete gear meshes with the second incomplete gear. Each of the transmission components is connected to an angle adjustment mechanism, which is connected to the fixed frame. The angle adjustment mechanism can drive the first incomplete gear to reciprocate around the second incomplete gear, thereby adjusting the meshing angle between the hemispherical planetary gear and the hemispherical central gear. The angle adjustment mechanism includes a crank, a connecting rod, a slider, and a guide rail. The guide rail is fixedly connected to the fixed frame and to the second connecting member. The slider is slidably connected to the guide rail. One end of the connecting rod is rotatably connected to the slider, and the other end is rotatably connected to the crank. One end of the crank is rotatably connected to the gear shaft of the first incomplete gear, and the other end is rotatably connected to the gear shaft of the second incomplete gear. By driving the slider to reciprocate along the guide rail, the first incomplete gear is driven to reciprocate around the second incomplete gear through the transmission of the connecting rod and the crank, thereby adjusting the meshing angle between the hemispherical planetary gear and the hemispherical central gear.

2. The greenhouse gas mixing and stirring device in a static chamber according to claim 1, characterized in that: The planetary gear shafts are configured as three, and the three planetary gear shafts are evenly distributed circumferentially along the central gear shaft.

3. The greenhouse gas mixing and stirring device in a static chamber according to claim 2, characterized in that: The fixing frame is a triangular fixing frame, and each of the three apex positions of the fixing frame is fixedly connected to a guide rail.

4. The greenhouse gas mixing and stirring device in a static chamber according to claim 1, characterized in that: It also includes a drive motor, the output shaft of which is connected to the central gear shaft to drive the central gear shaft to rotate.

5. A static box structure, characterized in that: The device includes a static housing and a greenhouse gas mixing and stirring device in the static housing as described in any one of claims 1 to 4. The top of the central gear shaft is rotatably connected to the top cover of the static housing. The fixing frame is fixedly connected to the static housing. Each of the fan impellers is respectively disposed at the lower end of each of the planetary gear shafts and located in the static housing.

6. The static box structure according to claim 5, characterized in that: The central gear shaft is connected to the output shaft of the drive motor, and the drive motor is fixedly connected to the cover on the top of the static housing.

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