Soil gas collecting column

Abstract

The utility model relates to a soil gas collecting column which comprises a cylinder and a circular tube arranged in the cylinder, two circular ring plates are arranged between the cylinder and the circular tube in the vertical direction, and the inner side wall of the cylinder and the outer side wall of the circular tube are fixedly connected in a sealed mode through the circular ring plates. An air inlet communicated with the upper annular plate and the lower annular plate is formed in the outer side wall of the cylinder, an air collecting hole communicated with the upper annular plate and the lower annular plate is formed in the inner side wall of the circular pipe, and an air outlet pipe communicated with the air collecting hole is arranged in the circular pipe. The gas collecting device has the beneficial effect that a worker can conveniently collect gas generated in soil within a certain depth.

Description

A soil gas collection and extraction column Technical Field

[0001] This utility model relates to the field of collection device technology, specifically to a soil gas collection column. Background Technology

[0002] In fields such as soil science research, environmental monitoring, and agricultural management, accurate collection and analysis of soil gas composition is crucial for understanding ecosystem function, assessing environmental pollution, and optimizing agricultural production measures. Soil gas composition is complex and diverse, including oxygen, carbon dioxide, methane, and hydrogen sulfide. The production and emission of these gases are regulated by various biogeochemical processes, such as soil microbial activity, plant root respiration, and organic matter decomposition.

[0003] However, previous soil gas collection devices often had certain technical problems during use. For example, the devices usually used a fixed structure, which could not flexibly adjust the sampling depth according to research needs, making it difficult to obtain the gas distribution characteristics of the vertical soil profile. For instance, the static box method required pre-burying boxes at different depths, which was cumbersome and costly. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a soil gas collection column that allows workers to easily collect gases generated at a certain depth in the soil.

[0005] This utility model is achieved through the following technical solution: a soil gas collection column is provided, including a cylinder and a circular tube disposed inside the cylinder. Two annular plates are vertically arranged between the cylinder and the circular tube. The inner wall of the cylinder and the outer wall of the circular tube are sealed and fixedly connected by the annular plates. An air inlet hole communicating with the upper and lower annular plates is opened on the outer wall of the cylinder. An air collection hole communicating with the upper and lower annular plates is provided on the inner wall of the circular tube. An air outlet pipe communicating with the air collection hole is provided inside the circular tube.

[0006] In use, this invention employs a cylindrical structure and a cylindrical tube within it. Two annular plates are vertically positioned between the cylinder and the tube. The inner wall of the cylinder and the outer wall of the tube are sealed and fixed together by the annular plates. An air inlet is located on the outer wall of the cylinder, communicating with the upper and lower annular plates. An air collection hole, also communicating with the upper and lower annular plates, is located on the inner wall of the tube. An air outlet, communicating with the air collection hole, is located inside the tube. To use the device, a pit of a certain depth must first be dug in the ground. The device is then placed in the pit and buried with soil, ensuring the movable end of the air outlet is above ground level. The air outlet is then connected to an external gas collection device. Gas generated in the soil enters the space between the upper and lower annular plates through the air inlet, then flows through the air collection hole into the air outlet, and finally into the gas collection device. This allows workers to easily collect gas generated at a certain depth in the soil.

[0007] Preferably, several cylinders are provided, distributed vertically, and adjacent cylinders are fixed together by hoops. By providing several cylinders distributed vertically and adjacent cylinders fixed together by hoops, it is convenient for workers to collect gases generated at different depths in the soil simultaneously.

[0008] Preferably, the gas outlet pipe includes a curved pipe communicating with the gas collection hole, with the end of the curved pipe away from the gas collection hole facing upwards and fixedly connected to a vertical pipe. The curved pipe and vertical pipe not only facilitate the connection of the gas outlet pipe to an external gas collection device, but also allow gas generated in the soil to enter the gas collection device through the gas outlet pipe.

[0009] Preferably, a cover plate is fixedly connected to the top of the upper cylinder. The cover plate has several through holes adapted to the vertical pipes, which pass through these holes. By fixing the cover plate to the top of the upper cylinder and providing the through holes, the collection of gas generated in the soil can be ensured while preventing soil from entering the pipes from the top of the device during burial.

[0010] Preferably, a dustproof net adapted to the air inlet is provided on the outer wall of the cylinder. By providing a dustproof net adapted to the air inlet on the outer wall of the cylinder, the dustproof net can ensure the collection of gas generated in the soil while preventing soil from entering between the upper and lower annular plates through the air inlet during the use of the device.

[0011] Preferably, the top of the upper annular plate is aligned with the top of the cylinder, and the bottom of the lower annular plate is aligned with the bottom of the cylinder. This alignment facilitates the collection of gases generated in the soil by workers.

[0012] Preferably, a sealing plate is fixed to the bottom of the lower cylinder. By fixing the sealing plate to the bottom of the lower cylinder, soil can be prevented from entering the cylinder from the bottom of the device during the burial process.

[0013] The beneficial effects of this utility model are as follows: By setting up a cylinder and a circular tube inside the cylinder, two circular ring plates are set vertically between the cylinder and the circular tube. The inner side wall of the cylinder and the outer side wall of the circular tube are sealed and fixed together by the circular ring plates. An air inlet hole communicating with the upper and lower circular ring plates is opened on the outer side wall of the cylinder. An air collection hole communicating with the upper and lower circular ring plates is set on the inner side wall of the circular tube. An air outlet pipe communicating with the air collection hole is set inside the circular tube. When using the device, a pit of a certain depth needs to be dug in the ground first, and then the device is placed in the pit and buried with soil so that the movable end of the air outlet pipe on the device is above the ground. Then, the air outlet pipe on the device is connected to an external gas collection device. The gas generated in the soil enters between the upper and lower circular ring plates through the air inlet hole, and enters the air outlet pipe through the air collection hole between the upper and lower circular ring plates, and then enters the gas collection device from the air outlet pipe. This makes it convenient for workers to collect the gas generated in the soil at a certain depth. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the structure of this utility model;

[0015] Figure 2 is a perspective view of the structure of this utility model;

[0016] Figure 3 is a cross-sectional view of the structure aa in Figure 1;

[0017] As shown in the figure:

[0018] 1. Vertical pipe, 2. Cylindrical tube, 3. Hoop, 4. Cover plate, 5. Sealing plate, 6. Air inlet, 7. Circular pipe, 8. Bend, 9. Air collection hole, 10. Through hole, 11. Circular ring plate, 12. Dustproof net. Detailed Implementation

[0019] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to describe the solution.

[0020] As shown in Figures 1-3, the soil gas collection column of this utility model includes a cylindrical cylinder 2 and a circular tube 7 disposed inside the cylindrical cylinder 2. Two annular plates 11 are vertically arranged between the cylindrical cylinder 2 and the circular tube 7. The inner wall of the cylindrical cylinder 2 and the outer wall of the circular tube 7 are sealed and fixedly connected by the annular plates 11. An air inlet 6 communicating with the upper and lower annular plates 11 is provided on the outer wall of the cylindrical cylinder 2. An air collection hole 9 communicating with the upper and lower annular plates 11 is provided on the inner wall of the circular tube 7. An air outlet pipe communicating with the air collection hole 9 is provided inside the circular tube 7.

[0021] By arranging several cylinders 2 vertically and fixing adjacent cylinders 2 together with hoops 3, it is possible for workers to collect gases generated at different depths in the soil simultaneously. The gas outlet pipe includes a bent pipe 8 connected to the gas collection hole 9. The end of the bent pipe 8 away from the gas collection hole 9 faces upwards and is fixedly connected to a vertical pipe 1. The bent pipe 8 and the vertical pipe 1 not only facilitate the connection of the gas outlet pipe to an external gas collection device but also allow gases generated in the soil to enter the gas collection device through the gas outlet pipe. A cover plate 4 is fixedly attached to the top of the upper cylinder 2. The cover plate 4 has several through holes 10 that fit the vertical pipes 1. The vertical pipes 1 pass through the through holes 10. The cover plate 4 and the through holes 10 ensure gas collection from the soil while preventing soil from entering the cylinder 7 from the top of the device during burial. By installing a dustproof net 12 on the outer wall of the cylinder 2, which is adapted to the air inlet 6, the dustproof net 12 can ensure the collection of gas generated in the soil while preventing soil from entering between the upper and lower annular plates 11 through the air inlet 6 during the use of the device. The top of the upper annular plate 11 is flush with the top of the cylinder 2, and the bottom of the lower annular plate 11 is flush with the bottom of the cylinder 2, which facilitates the collection of gas generated in the soil by the staff. By fixing a sealing plate 5 to the bottom of the lower cylinder 2, the sealing plate 5 can prevent soil from entering the circular tube 7 from the bottom of the device during the burial process.

[0022] Referring to Figures 1-3, the method of using this utility model is as follows: First, a pit of a certain depth needs to be dug in the ground, then the device is placed in the pit and buried with soil so that the end of the vertical pipe 1 away from the curved pipe 8 is above the ground. Then, the ends of the vertical pipes 1 away from the curved pipe 8 are connected to the gas collection device in the outside. The gas generated in the soil enters between the upper and lower circular plates 11 through the air inlet 6 and the dustproof net 12, and enters the gas collection device through the gas collection hole 9, the curved pipe 8 and the vertical pipe 1 between the upper and lower circular plates 11. This allows the staff to collect the gas generated at different depths in the soil at the same time.

[0023] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A soil gas collection column, characterized by: It includes a cylinder (2) and a circular tube (7) disposed inside the cylinder. Two circular ring plates (11) are arranged vertically between the cylinder and the circular tube. The inner side wall of the cylinder and the outer side wall of the circular tube are sealed and fixed together by the circular ring plates. An air inlet (6) communicating with the upper and lower circular ring plates is provided on the outer side wall of the cylinder. An air collecting hole (9) communicating with the upper and lower circular ring plates is provided on the inner side wall of the circular tube. An air outlet pipe communicating with the air collecting hole is provided inside the circular tube.

2. The soil gas collection column of claim 1, wherein: The cylinder is provided in several ways, and the cylinders are distributed in a vertical direction. Adjacent cylinders are fixed together by a hoop (3).

3. The soil gas collection and extraction column according to claim 1, characterized in that: The air outlet pipe includes a bent pipe (8) that communicates with the air collection hole, with the end of the bent pipe away from the air collection hole facing upward and fixedly connected to a vertical pipe (1).

4. The soil gas collection and extraction column according to claim 1, characterized in that: A cover plate (4) is fixed to the top of the upper cylinder. The cover plate has several through holes (10) adapted to several vertical pipes. Several vertical pipes pass through several through holes respectively.

5. The soil gas collection and extraction column according to claim 4, characterized in that: A dustproof net (12) adapted to the air inlet is provided on the outer wall of the cylinder.

6. The soil gas collection and extraction column according to claim 4, characterized in that: The top of the upper annular plate is aligned with the top of the cylinder, and the bottom of the lower annular plate is aligned with the bottom of the cylinder.

7. The soil gas collection and extraction column according to claim 4, characterized in that: A sealing plate (5) is fixedly connected to the bottom of the lower cylinder.

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