Device for collecting farmland soil gas and discharging greenhouse gas

Abstract

The invention discloses a device for collecting farmland soil gas and discharging greenhouse gas, which comprises a box body and a base, the box body is arranged above the base, a vacuum pump is arranged above the box body, a hose for collecting and conveying the soil gas is arranged on one side of the box body, and a valve body is arranged between the box body and the hose. A tightening belt for changing the suction force of the hose is arranged on the hose, and a driving assembly for controlling a valve body switch and the tightening degree of the tightening belt is arranged on one side of the box body. According to the device, the driving assembly drives the valve to be opened through transmission of the transmission assembly, at the moment, the hose communicates with the interior of the box body, suction force is generated through vacuum in the box body, gas in soil is conveyed into the box body through the hose, and after the gas is collected in the box body, the vacuum degree in the box body is not enough to generate suction force for the transmission plate and the gas; and at the moment, the transmission plate rebounds and resets under the action of the spring, and the driving assembly closes the valve through the transmission assembly.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of soil gas collection, and in particular to a device for collecting greenhouse gases emitted from farmland soil gas. Background Art

[0002] In today's world, farmland is one of the important sources of greenhouse gas emissions. With the development of agriculture, microbial activities in the soil, crop growth, and agricultural production processes will lead to the emission of greenhouse gases such as carbon dioxide, methane, and nitrous oxide, which contribute up to 80% of the greenhouse effect. The severe situation of global climate change has made the study of greenhouse gas emissions from farmland more urgent. Research on soil gas diffusion characteristics and soil greenhouse gas emissions often requires accurate measurement of soil gas composition and concentration. Among them, accurate collection of soil gas samples is a crucial prerequisite.

[0003] Existing gas collection devices usually use a vacuum mechanism to extract gas from farmland soil and transport it into a box for collection. Since the vacuum mechanism is usually implemented by a pump or an air bag, it will not be possible to maintain a high vacuum state inside the box, which will affect the accuracy of gas collection detection inside the box. In addition, different moisture contents of farmland soil will cause changes in the gas content inside the farmland soil. The drier the soil, the higher the gas content. At this time, the vacuum mechanism can easily collect the gas. The wetter the soil, the lower the gas content. If the vacuum mechanism still uses the original suction force, it will be difficult to collect gas. The suction force needs to be increased to extract the gas from the wet soil. Existing vacuum mechanisms usually have a constant suction force or are manually adjusted. However, it is impossible to manually judge the air content inside the soil. Therefore, the adjustment can only be approximate. This will have a certain impact on the actual collection of soil gas and may require multiple adjustments, which is inconvenient to operate. Summary of the invention

[0004] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technologies. It mainly provides a device for collecting greenhouse gases emitted by farmland soil gas, which is used to solve the technical problem proposed in the above background technology that the existing soil gas collection is carried out by pumping air through a pump or air bag outside the box, which makes it difficult to maintain a high vacuum degree inside the box, affecting the accuracy of the collected gas detection. At the same time, since the soil moisture will affect the content of the gas inside the soil, it is necessary to adjust the suction force of the suction mechanism according to the soil moisture to achieve the collection of the gas inside the soil with different humidity. Manual adjustment requires multiple adjustments, which is inconvenient, and can only be adjusted to an approximate range, affecting the actual technical problem of the efficiency of soil gas collection.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: A device for collecting greenhouse gases emitted from farmland soil gas, comprising a box and a base, wherein the box is arranged above the base, a vacuum pump is arranged above the box, a hose for collecting and transporting soil gas is arranged on one side of the box, a valve body is arranged between the box and the hose, a tightening belt for changing the suction force of the hose is arranged on the hose, and a driving component for controlling the valve body switch and the tightening degree of the tightening belt is arranged on one side of the box.

[0006] Preferably, a valve body is provided on one side of the box body, a valve stem is provided on the valve body, a hose is provided on one side of the valve body, and the hose is connected with the inner cavity of the box body through the valve body.

[0007] Preferably, one end of the hose is provided with an air suction nozzle, a circular filter cartridge is provided on the air suction nozzle, and a conical filter cartridge is provided below the circular filter cartridge.

[0008] Preferably, the driving assembly includes a limiting cylinder, a piston cylinder is arranged inside the limiting cylinder, a transmission rod is fixedly installed on one side of the piston cylinder, a transmission plate is fixedly installed on the end of the transmission rod away from the piston cylinder, the transmission plate is inside the inner cavity of the box, and a spring is sleeved on the transmission rod.

[0009] Preferably, a rotating rod is rotatably connected to the box body, a handle is sleeved on one end of the rotating rod, a partition plate is fixedly installed on the end of the rotating rod away from the handle, and the partition plate covers the opening at one end of the limiting cylinder inside the box body.

[0010] Preferably, a support block is fixedly mounted on the side of the piston cylinder away from the transmission rod, and a connecting block is fixedly mounted on the support block.

[0011] Preferably, one end of the connecting block is fixedly connected to one end of a tightening rope of a tightening belt, and the tightening belt is sleeved on the hose.

[0012] Preferably, a sliding block is fixedly mounted on one side of the box body, a transmission block is slidably connected to the sliding block, and the transmission block is fixedly connected to one end of the connection block away from the tightening belt.

[0013] Preferably, a valve stem is provided on the valve body, a connecting rod is fixedly installed below the valve stem, a flat gear is fixedly installed on the connecting rod, a tooth groove is provided on the transmission block, and the flat gear is meshed with the tooth groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the interior of the box is in a vacuum state, and when the vacuum nozzle is inserted into the soil, the partition plate that limits the cylinder at the opening inside the box is opened, and at this time, the transmission plate is driven by the suction force generated by the vacuum inside the box to gradually move inward, and the driving component drives the valve to open through the transmission component. At this time, the hose is connected to the inside of the box, and suction is generated by the vacuum inside the box. The gas inside the soil is transported into the box through the hose. After the gas is collected inside the box, the vacuum degree inside the box is not enough to generate suction for the transmission plate and the gas. At this time, the transmission plate rebounds and resets under the action of the spring, and the driving component will close the valve through the transmission component. In this way, when the box collects gas again, the valve can be automatically opened, and when enough gas is collected inside the box, the valve is automatically closed, which can ensure that enough gas is collected inside the box without manual operation, thereby preventing the situation where manual operation cannot well control the amount of gas collected inside the box.

[0015] When the partition plate on one side of the restricting cylinder is opened, the vacuum inside the box moves the transmission plate inward. At this time, the hose generates suction to extract air from the soil. However, if the moisture content inside the soil is high and the air content is low, the suction generated by the hose is not enough to suck out the gas inside the soil. At this time, no gas will enter the box. In this way, the vacuum inside the box will continue to drive the transmission plate to move inward, and the transmission plate will begin to tighten the tightening belt through the transmission assembly. The tightening belt will tighten the hose and reduce the diameter of the hose to increase the suction generated by the hose on the soil gas. When the hose is tightened enough to collect the soil gas, the gas enters the box at this time. After the gas enters the box, the vacuum degree gradually decreases, so the suction on the transmission plate also slowly decreases. The air pressure at the bottom of the hose is too low to move properly, so the air is pumped in quickly and the air is pumped in. When the air pressure at the bottom of the hose is too low, the air is pumped in slowly and the air is pumped in. When the air pressure at the bottom of the hose is too high, the air is pumped in slowly and the air is pumped in. When the air pressure at the bottom of the hose is too high, the air is pumped in slowly and the air is pumped in.

[0016] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the side three-dimensional structure of the present invention; Figure 3 It is a top view of the three-dimensional structure of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the limiting cylinder of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of a circular filter cartridge and a conical filter cartridge of the present invention; The markings in the figure are: 1. Box body; 2. Base; 3. Vacuum pump; 4. Valve body; 5. Valve stem; 6. Hose; 7. Vacuum nozzle; 8. Round filter cartridge; 9. Conical filter cartridge; 10. Rotating rod; 11. Handle; 12. Partition plate; 13. Limiting cylinder; 14. Transmission plate; 15. Transmission rod; 16. Piston cylinder; 17. Spring; 18. Support block; 19. Connecting block; 20. Tightening belt; 21. Sliding block; 22. Transmission block; 23. Tooth groove; 24. Flat gear; 25. Connecting rod. DETAILED DESCRIPTION

[0018] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0019] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field to which the present invention belongs. The terminology used in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0021] Please refer to the attached Figure 1-Figure 6A device for collecting greenhouse gases emitted from farmland soil gas comprises a box body 1 and a base 2, the box body 1 is arranged above the base 2, a vacuum pump 3 is arranged above the box body 1, a hose 6 for collecting and transporting soil gas is arranged on one side of the box body 1, a valve body 4 is arranged between the box body 1 and the hose 6, a tightening belt 20 for changing the suction force of the hose 6 is arranged on the hose 6, and a driving component for controlling the switch of the valve body 4 and the tightening degree of the tightening belt 20 is arranged on one side of the box body 1.

[0022] The specific operation process of the present invention is as follows: the gas inside the box 1 is extracted through the vacuum pump 3, and the inside of the box 1 is in a vacuum state. Then the suction nozzle 7 at one end of the hose 6 is inserted into the soil, and then the driving component is connected to the inside of the box 1. The box 1 drives the driving component to work through the pressure generated by the internal vacuum. The driving component first opens the valve body 4. At this time, the hose 6 is connected to the inside of the box 1, and the vacuum inside the box 1 generates suction on the hose 6, and the soil gas is extracted and collected through the hose 6. At that time, due to the different soil moisture and the different gas content inside the soil, the suction generated by the hose 6 may not be able to extract the soil gas at the first time. At this time, the driving component will tighten the hose 6 by tightening the tightening belt 20, reduce the diameter of the hose 6, thereby increasing the suction generated by the hose 6 until the hose 6 can extract the soil gas. At this time, the tightening belt 20 will continue to tighten to maintain the suction force of the hose 6, because there is gas When entering the box body 1, the vacuum degree inside the box body 1 will decrease, and the suction force generated will also decrease, while the hose 6 can be tightened to increase the suction force, which is equivalent to maintaining the suction force of the hose 6 to extract the soil gas. When the gas inside the box body 1 is collected enough, the drive component begins to rebound and reset. At this time, the valve body 4 will be closed, and the hose 6 will resume its maximum caliber state; an outlet pipe for collecting the gas inside the box body 1 is opened on one side of the box body 1, and a valve is set on the outlet pipe. When it is necessary to extract and test the gas, a syringe is connected to the outlet pipe, and then the valve on the outlet pipe is opened to extract the gas inside the box body 1 through the syringe, and then it is transported to the inside of the detection bottle through the syringe. In this way, the gas collected in the box body 1 can be transferred to the inside of the detection bottle, and the greenhouse gas content in the gas can be detected by the instrument.

[0023] Please refer to Figure 1-Figure 4 A valve body 4 is arranged on one side of the box body 1 , a valve stem 5 is arranged on the valve body 4 , a hose 6 is arranged on one side of the valve body 4 , and the hose 6 is connected with the inner cavity of the box body 1 through the valve body 4 .

[0024] The valve stem 5 is rotated to open the valve inside the valve body 4 , and the hose 6 is now connected to the inner cavity of the box body 1 . At this time, the inside of the box body 1 is in a vacuum state, and negative pressure is generated to generate suction on the hose 6 .

[0025] Please refer to Figure 6One end of the hose 6 is sleeved with an air suction nozzle 7, a circular filter cartridge 8 is sleeved on the air suction nozzle 7, and a conical filter cartridge 9 is arranged below the circular filter cartridge 8.

[0026] The conical filter cartridge 9 is inserted into the soil. The conical filter cartridge 9, the circular filter cartridge 8 and the vacuum nozzle 7 are all inside the soil. The suction force generated by the hose 6 acts on the vacuum nozzle 7. The soil gas is extracted through the vacuum nozzle 7. The circular filter cartridge 8 and the conical filter cartridge 9 are used to filter leaves and sediment to prevent blockage of the vacuum nozzle 7 and the hose 6.

[0027] Please refer to Figure 3 and Figure 4 The driving assembly includes a limiting cylinder 13, a piston cylinder 16 is arranged inside the limiting cylinder 13, a transmission rod 15 is fixedly installed on one side of the piston cylinder 16, a transmission plate 14 is fixedly installed on the end of the transmission rod 15 away from the piston cylinder 16, the transmission plate 14 is inside the inner cavity of the box body 1, a spring 17 is sleeved on the transmission rod 15, a rotating rod 10 is rotatably connected to the box body 1, a handle 11 is sleeved on one end of the rotating rod 10, a partition plate 12 is fixedly installed on the end of the rotating rod 10 away from the handle 11, and the partition plate 12 covers the opening of the limiting cylinder 13 at one end inside the box body 1.

[0028] The handle 11 is turned, and the handle 11 drives the rotating rod 10 to rotate. The rotating rod 10 drives the partition plate 12 to rotate. The partition plate 12 is turned away from the opening on one side of the limiting cylinder 13. At this time, the transmission plate 14 inside the limiting cylinder 13 contacts the inner cavity of the box 1. The inside of the box 1 is in a vacuum state. The negative pressure of the vacuum inside the box 1 generates suction on the transmission plate 14. The transmission plate 14 pulls the piston cylinder 16 inward through the transmission rod 15. The piston cylinder 16 fits with the inner wall of the limiting cylinder 13 to prevent gas from entering the box from the limiting cylinder 13. 1, and the inward movement of the piston cylinder 16 will compress the spring 17. When the gas enters the box body 1, the vacuum degree inside the box body 1 decreases, and the negative pressure begins to decrease. At this time, the transmission plate 14 will still move inward, but the movement speed will slow down. When the gas inside the box body 1 is full, the transmission plate 14 stops first. When more gas enters, the rebound force of the spring 17 is greater than the suction force generated by the negative pressure inside the box body 1 on the transmission plate 14. At this time, the spring 17 rebounds and resets, and the transmission plate 14 will be driven by the piston cylinder 16 and the transmission rod 15 to quickly reset.

[0029] Please refer to Figure 3 and Figure 4A support block 18 is fixedly installed on the side of the piston cylinder 16 away from the transmission rod 15, and a connecting block 19 is fixedly installed on the support block 18. One end of the connecting block 19 is fixedly connected to one end of the tightening rope of the tightening belt 20. The tightening belt 20 is sleeved on the hose 6. A sliding block 21 is fixedly installed on one side of the box body 1. A transmission block 22 is slidably connected to the sliding block 21. The transmission block 22 is fixedly connected to one end of the connecting block 19 away from the tightening belt 20. A connecting rod 25 is fixedly installed below the valve stem 5, and a flat gear 24 is fixedly installed on the connecting rod 25. A tooth groove 23 is opened on the transmission block 22, and the flat gear 24 meshes with the tooth groove 23.

[0030] When the piston cylinder 16 moves inward, it drives the support block 18 to move inward, the support block 18 drives the connecting block 19 to move inward, the connecting block 19 pulls the tightening belt 20 to tighten the tightening belt 20, and the tightening belt 20 tightens the hose 6. At the same time, the connecting block 19 drives the transmission block 22 to move inward along the sliding block 21, and the transmission block 22 drives the flat gear 24 to move through the tooth groove 23, and the flat gear 24 drives the connecting rod 25 to rotate, and the connecting rod 25 drives the valve stem 5 to rotate and open the valve body 4.

[0031] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A device for collecting greenhouse gases emitted from farmland soil gas, comprising a box (1) and a base (2), wherein the box (1) is arranged above the base (2), and is characterized in that: A vacuum pump (3) is arranged above the box (1); a hose (6) for collecting and transporting soil gas is arranged on one side of the box (1); a valve body (4) is arranged between the box (1) and the hose (6); a tightening belt (20) for changing the suction force of the hose (6) is arranged on the hose (6); and a driving component for controlling the switch of the valve body (4) and the tightening degree of the tightening belt (20) is arranged on one side of the box (1).

2. The device for collecting greenhouse gases emitted from farmland soil gas according to claim 1, characterized in that: A valve body (4) is provided on one side of the box body (1), a valve stem (5) is provided on the valve body (4), a hose (6) is provided on one side of the valve body (4), and the hose (6) is connected to the inner cavity of the box body (1) through the valve body (4).

3. The device for collecting greenhouse gases emitted from farmland soil gas according to claim 1, characterized in that: An air suction nozzle (7) is sleeved on one end of the hose (6), a circular filter cartridge (8) is sleeved on the air suction nozzle (7), and a conical filter cartridge (9) is arranged below the circular filter cartridge (8).

4. The device for collecting greenhouse gases emitted from farmland soil gas according to claim 2, characterized in that: The driving assembly comprises a limiting cylinder (13), a piston cylinder (16) is arranged inside the limiting cylinder (13), a transmission rod (15) is fixedly mounted on one side of the piston cylinder (16), a transmission plate (14) is fixedly mounted on one end of the transmission rod (15) away from the piston cylinder (16), the transmission plate (14) is located inside the inner cavity of the box body (1), and a spring (17) is sleeved on the transmission rod (15).

5. The device for collecting greenhouse gases emitted from farmland soil gas according to claim 4, characterized in that: A rotating rod (10) is rotatably connected to the box body (1), one end of the rotating rod (10) is sleeved with a handle (11), and a partition plate (12) is fixedly mounted on the end of the rotating rod (10) away from the handle (11), and the partition plate (12) covers an opening at one end of the limiting cylinder (13) inside the box body (1).

6. The device for collecting greenhouse gases emitted from farmland soil gas according to claim 4, characterized in that: A support block (18) is fixedly mounted on the side of the piston cylinder (16) away from the transmission rod (15), and a connecting block (19) is fixedly mounted on the support block (18).

7. The device for collecting greenhouse gases emitted from farmland soil gas according to claim 6, characterized in that: One end of the connection block (19) is fixedly connected to one end of a tensioning rope of a tightening belt (20), and the tightening belt (20) is sleeved on the hose (6).

8. The device for collecting greenhouse gases emitted from farmland soil gas according to claim 6, characterized in that: A sliding block (21) is fixedly mounted on one side of the box body (1), a transmission block (22) is slidably connected to the sliding block (21), and the transmission block (22) is fixedly connected to an end of the connection block (19) away from the tightening belt (20).

9. The device for collecting greenhouse gases emitted from farmland soil gas according to claim 8, characterized in that: The valve body (4) is provided with a valve stem (5), a connecting rod (25) is fixedly mounted below the valve stem (5), a spur gear (24) is fixedly mounted on the connecting rod (25), a tooth groove (23) is formed on the transmission block (22), and the spur gear (24) meshes with the tooth groove (23).

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