A static chamber for soil gas collection

Abstract

The application discloses a static box for collecting soil gas, which comprises a ground box, a middle box and a top box which are sequentially abutted, one end of the middle box is fixed with a first insertion pipe, the inside of the top box is divided into an installation cavity and a gas collecting cavity, one end of the top box is fixed with a second insertion pipe, the sealing element comprises annular groove bodies filled with sealing liquid, the annular groove bodies are respectively fixed with the ground box and the middle box, the first insertion pipe and the second insertion pipe can be inserted into the annular groove bodies, a balloon is limited in the gas collecting cavity, an air pump is communicated with the balloon, and an air outlet pipe is communicated with the gas collecting cavity. The annular groove bodies are filled with the sealing liquid, the ground box and the middle box, and the middle box and the top box can be reliably sealed through the arrangement of the annular groove bodies, the first insertion pipe and the second insertion pipe, the air pump, the balloon and the one-way valve are arranged, and when the static box is used for collecting gas, the external air cannot enter the static box and dilute the gas to be detected in the static box.

Description

Technical Field

[0001] This invention relates to the field of greenhouse gas detection, and more specifically to a static chamber for soil gas collection. Background Technology

[0002] Currently available static boxes on the market use water for sealing. Since static boxes need to remain stationary outdoors for a long time, the water used for sealing is prone to evaporation, which reduces the sealing performance of the static box or even causes it to fail.

[0003] When collecting gas in a static chamber, researchers typically use an air pump or syringe to extract the gas from inside the chamber. Due to this extraction method, a negative pressure is generated inside the static chamber when the gas is extracted. External air will enter the static chamber through the gap between the static chamber and the ground to be tested, which will dilute the original test gas inside the static chamber and cause the experimental results to be distorted.

[0004] Therefore, how to provide a static chamber for soil gas collection that can overcome the above-mentioned problems is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a static chamber for soil gas collection.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A static chamber for soil gas sampling, comprising:

[0008] A ground box, with openings at both ends and one end capable of being sealed and fastened to the ground to be tested;

[0009] The middle section box has an opening at one end and a closed end at the other. The closed end of the middle section box can be tightly abutted against the end of the ground box away from the ground to be tested. The closed end of the middle section box has an opening and is fixed with a tube that communicates with its interior.

[0010] The top box is closed at both ends and has a partition fixed inside. The partition divides the top box into an installation cavity and an air collection cavity. One closed end of the top box has an opening and is fixed with a second insertion tube that communicates with the air collection cavity. The end of the top box with the second insertion tube fixed can be tightly connected to the open end of the middle section box.

[0011] The sealing element includes an annular groove with a cross-section in the shape of a door, the annular groove being filled with sealing fluid. Two annular grooves are arranged and each is fixed to the inner wall of the ground box and the inner wall of the intermediate box. Insertion tube one can be inserted into the annular groove fixed to the ground box and immersed in the sealing fluid, and insertion tube two can be inserted into the annular groove fixed to the intermediate box and immersed in the sealing fluid.

[0012] The air extraction assembly includes a balloon, an air pump, a gas flow meter, an outlet pipe, and a one-way valve. The balloon is confined within the air collection chamber. The air pump and the gas flow meter are both installed in the mounting chamber. The outlet end of the air pump is connected to the balloon through a pipeline, and the gas flow meter is connected in series between the two. One end of the outlet pipe is connected to the air collection chamber, and the other end is located outside the top box. The one-way valve is connected in series on the outlet pipe and is confined within the mounting chamber. The top box has an air pressure balance hole that communicates with the mounting chamber.

[0013] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a static chamber for soil gas collection. The present invention, by setting an annular groove, a first insertion tube, and a second insertion tube, with the annular groove filled with sealing liquid, can reliably seal between the ground chamber and the middle chamber, and between the middle chamber and the top chamber. The annular groove is confined within the ground chamber and the middle chamber, preventing the sealing liquid from being exposed on the outside of the static chamber, preventing rapid evaporation of the sealing liquid, and ensuring the sealing effect. By setting an air pump, a balloon, and a one-way valve, when the operator collects gas from the static chamber, the expansion of the balloon creates a positive pressure state inside the static chamber, and the gas inside the static chamber is "squeezed out". The gas is collected into the gas collection bag through the gas outlet pipe. This setting ensures that when the operator collects gas from the static chamber, external air will not enter the static chamber and will not dilute the gas to be detected inside the static chamber.

[0014] Preferably, an annular baffle is fixed to the inner wall of the base box, and the bottom wall of an annular trough is fixed to the surface of the annular baffle. An annular baffle is fixed to the inner wall of the intermediate box, and the bottom wall of another annular trough is fixed to the surface of the annular baffle. This arrangement ensures that the annular trough can be reliably fixed to the base box and the intermediate box.

[0015] Preferably, the sealing element further includes annular arc-shaped baffles. One arc-shaped baffle is fixed to each of the two end walls at the opening of the annular groove. The two arc-shaped baffles are positioned between their arc centers and within the annular groove. The inner and outer walls of the first insertion tube and the second insertion tube can respectively abut tightly against the outer arc surfaces of the two arc-shaped baffles. The outer arc surfaces of the arc-shaped baffles abut tightly against the inner and outer walls of the first and second insertion tubes. When the first and second insertion tubes are inserted into the annular groove, the arc-shaped baffles seal the opening of the annular groove, further preventing the sealing fluid from evaporating and ensuring a sealing effect.

[0016] Preferably, the device also includes a temperature measuring component and a battery. The temperature measuring component includes a thermometer, an internal temperature probe, an external ground surface temperature probe, an external soil temperature probe, and an external air temperature probe. The thermometer and the battery are both installed in the mounting cavity. The display screens of the thermometer and the gas flow meter are both fixed at the end of the top box away from the second insertion tube. The thermometer, the air pump, and the gas flow meter are all electrically connected to the battery. The thermometer is connected to the signals of the internal temperature probe, the external ground surface temperature probe, the external soil temperature probe, and the external air temperature probe, respectively. The internal temperature probe is fixed to the partition and is limited within the gas collection cavity. The external ground surface temperature probe can be placed on the ground surface to be tested outside the ground box. The external soil temperature probe can be inserted into the ground surface to be tested outside the ground box. The external air temperature probe can be placed outside the ground box, the middle box, and the top box. The thermometer can display the temperature of the environment inside and outside the static chamber when collecting gas, which helps in the subsequent analysis of the collected gas and ensures the accuracy of the experimental results.

[0017] Preferably, it also includes an agitator fan, which is confined within the gas collection chamber and fixed to the partition, and is electrically connected to the battery. This arrangement ensures that the gas inside the static chamber can enter the gas collection bag evenly.

[0018] Preferably, it also includes a handle, which is fixed to the end of the top box away from the insertion tube. This configuration facilitates the handling of the top box.

[0019] Preferably, the system also includes snap-on panels and fasteners. The snap-on panels and fasteners are compatible, with multiple snap-on panels fixed to the outer walls of both the top box and the middle box, and multiple fasteners fixed to the outer walls of both the middle box and the bottom box. The snap-on panels fixed to the top box can each snap onto the multiple fasteners fixed to the middle box, and the snap-on panels fixed to the middle box can each snap onto the multiple fasteners fixed to the bottom box. This configuration ensures a reliable connection between the bottom box, the middle box, and the top box.

[0020] Preferably, it also includes insertion teeth, which are fixed to the end wall of the ground box away from the middle section box, and the insertion teeth can be inserted into the ground to be tested. This arrangement ensures that the ground box can be reliably inserted into the ground to be tested. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1This is an overall isometric drawing of a static chamber used for soil gas sampling.

[0023] Figure 2 This is a top view of a static chamber used for soil gas sampling;

[0024] Figure 3 yes Figure 2 A cross-sectional view along the AA direction;

[0025] Figure 4 yes Figure 3 A magnified view of section B;

[0026] Figure 5 A partial isometric view of a static chamber for soil gas sampling Figure 1 ;

[0027] Figure 6 A partial isometric view of a static chamber for soil gas sampling Figure 2 ;

[0028] Figure 7 A partial isometric view of a static chamber for soil gas sampling Figure 3 ;

[0029] Figure 8 A partial isometric view of a static chamber for soil gas sampling Figure 4 .

[0030] In the diagram:

[0031] 1 is the ground box, 2 is the middle box, 3 is the first insertion tube, 4 is the top box, 40 is the air pressure balance hole, 5 is the partition, 6 is the second insertion tube, 7 is the annular trough, 8 is the arc-shaped baffle, 9 is the sealing fluid, 10 is the balloon, 11 is the air pump, 12 is the gas flow meter, 13 is the air outlet pipe, 14 is the one-way valve, 15 is the first annular baffle, 16 is the second annular baffle, 17 is the thermometer, 18 is the internal temperature detection probe, 19 is the external surface temperature detection probe, 20 is the external soil temperature detection probe, and 21 is the external air temperature detection probe. Detailed Implementation

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below. 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.

[0033] This invention discloses a static chamber for soil gas collection. The invention comprises an annular trough 7, an arc-shaped baffle 8 fixed to the annular trough 7, a first insertion tube 3, and a second insertion tube 6. The annular trough 7 is filled with a sealing liquid 9. This arrangement ensures reliable sealing between the ground chamber 1 and the intermediate chamber 2, and between the intermediate chamber 2 and the top chamber 4. The annular trough 7 is confined within the ground chamber 1 and the intermediate chamber 2, preventing the sealing liquid 9 from being exposed on the outside of the static chamber and preventing rapid evaporation. Furthermore, the outer arc surface of the arc-shaped baffle 8 can tightly abut against the inner and outer walls of the first insertion tube 3 and the second insertion tube 6. When the first insertion tube 3 and the second insertion tube 6 are inserted into the annular trough 7, the arc-shaped baffle 8 can seal the opening of the annular trough 7, further preventing the evaporation and loss of the sealing liquid 9 and ensuring a sealing effect. The invention also includes an air pump 11, a balloon 10, and a one-way valve 14 for operation. When operators collect gas from the static chamber, the expansion of balloon 10 creates a positive pressure inside the chamber, causing the gas inside to be "squeezed out." The gas is then collected into the gas collection bag through the outlet pipe 13. This design ensures that outside air does not enter the static chamber during gas collection, preventing dilution of the gas to be tested. The agitator fan 23 ensures that the gas inside the static chamber enters the gas collection bag evenly. A temperature measuring device 17 displays the temperature inside and outside the static chamber during gas collection, aiding in subsequent gas analysis and ensuring the accuracy of experimental results. The buckle plate 25 and fastener 26 ensure a reliable connection between the ground chamber 1, the middle chamber 2, and the top chamber 4.

[0034] Example

[0035] See appendix Figure 1-8 This is a schematic diagram of the overall and partial structure of one embodiment of the present invention. Specifically, the present invention discloses a static chamber for soil gas sampling, comprising:

[0036] Ground box 1 has a circular cross-section. Ground box 1 is open at both ends and the end wall of one of the open ends is sharpened. The sharpened end of ground box 1 can be sealed and fastened to the ground to be tested (not shown in the figure). Because the end wall is sharpened, the sharpened end of ground box 1 can be inserted into the ground to be tested to a certain depth to ensure the sealing between ground box 1 and the ground to be tested.

[0037] The middle section box 2 has the same cross-sectional shape as the ground box 1. One end of the middle section box 2 is open and the other end is closed. The middle section box 2 and the ground box 1 can be arranged coaxially. The closed end of the middle section box 2 can be tightly abutted against the end of the ground box 1 away from the ground to be tested. The closed end of the middle section box 2 has an opening and a cylindrical insertion tube 3 that communicates with its interior is fixed coaxially.

[0038] Top box 4 has the same cross-sectional shape as ground box 1. Top box 4 is closed at both ends and a partition 5 is fixed inside it by welding. The surface of partition 5 is perpendicular to the axis of top box 4. Partition 5 divides top box 4 into installation cavity and gas collection cavity. One closed end of top box 4 has an opening and a cylindrical insertion tube 6 that communicates with the gas collection cavity is fixed coaxially. Top box 4 and middle box 2 can be arranged coaxially, and the end of top box 4 with insertion tube 6 can be tightly abutted against the open end of middle box 2.

[0039] The bottom box 1, the middle box 2, and the top box 4 are all made of stainless steel.

[0040] The sealing element includes an annular groove 7 with a U-shaped cross-section. The annular groove 7 is made of elastic material and filled with a sealing liquid 9. The sealing liquid 9 is either water or an oily liquid. In this embodiment, the sealing liquid 9 is an oily liquid. Using an oily liquid can slow down its evaporation rate and ensure airtightness. There are two annular grooves 7, each fixed to the inner wall of the ground box 1 and the inner wall of the middle box 2. Insertion tube 1 3 can be inserted into the annular groove 7 fixed to the ground box 1 and immersed in the sealing liquid 9. Insertion tube 2 6 can be inserted into the annular groove 7 fixed to the middle box 2 and immersed in the sealing liquid 9.

[0041] The air extraction assembly includes a balloon 10, an air pump 11, a gas flow meter 12, an air outlet pipe 13, and a one-way valve 14. The balloon 10 is confined within the air collection chamber. The air pump 11 and the gas flow meter 12 are both confined within the mounting cavity and fixed to the partition 5. The air outlet end of the air pump 11 is connected to the balloon 10 via a pipeline, and the gas flow meter 12 is connected in series between them. The gas flow meter 12 can detect the inflation volume of the balloon 10. One end of the air outlet pipe 13 is connected to the air collection chamber, and the other end is located outside the top box 4. The end of the air outlet pipe 13 located outside the top box 4 can... It can be connected to the air collection bag (not shown in the figure). The one-way valve 14 is connected in series with the air outlet pipe 13 and is limited in the installation cavity. The one-way valve 14 ensures that the gas inside the top box 4 can only be discharged to the outside through the air outlet pipe 13. External air will not enter the top box 4 from the air outlet pipe 13. The top box 4 is provided with an air pressure balance hole 40 that communicates with the installation cavity. The purpose of setting the air pressure balance hole 40 is to ensure that the air pump 11 can smoothly enter the air when the air pump 11 is inflating the balloon 10. The installation cavity cannot be set to be completely closed. It is necessary to ensure that the air pump 11 can work normally.

[0042] More specifically, an annular baffle 15 is welded and fixed to the inner wall of the ground box 1. The bottom wall of an annular trough 7 is fixed to the surface of the annular baffle 15 by adhesive bonding, and its outer trough wall is also fixed to the inner wall of the ground box 1 by adhesive bonding. An annular baffle 26 is welded and fixed to the inner wall of the middle section box 2. The bottom wall of another annular trough 7 is fixed to the surface of the annular baffle 26 by adhesive bonding, and its outer trough wall is also fixed to the inner wall of the middle section box 2 by adhesive bonding.

[0043] More specifically, the seal also includes annular arc-shaped baffles 8. An arc-shaped baffle 8 is integrally formed on each of the two end walls at the opening of the annular groove 7. The two arc-shaped baffles 8 are positioned between their arc centers and are both confined within the annular groove 7.

[0044] When either cannula 3 or cannula 6 is not inserted into the annular groove 7, the outer arc surfaces of the two arc-shaped baffles 8 located inside the same annular groove 7 can abut against each other.

[0045] When the first insertion tube 3 or the second insertion tube 6 is inserted into the annular groove 7, the inner and outer walls of the first insertion tube 3 can respectively abut against the outer arc surfaces of the two arc-shaped baffles 8, and the inner and outer walls of the second insertion tube 6 can respectively abut against the outer arc surfaces of the two arc-shaped baffles 8.

[0046] More specifically, it also includes a temperature sensing component and a battery 22. The temperature sensing component includes a thermometer 17, an internal temperature detection probe 18, an external ground surface temperature detection probe 19, an external soil temperature detection probe 20, and an external air temperature detection probe 21.

[0047] The thermometer 17 and the battery 22 are both installed in the mounting cavity and fixed to the partition 5. Preferably, the thermometer 17 in this application is model JM624, and the display screens of the thermometer 17 and the gas flow meter 12 are both fixed at the end of the top box 4 away from the insertion tube 6, for easy observation by the operator. The thermometer 17, the air pump 11, and the gas flow meter 12 are all electrically connected to the battery 22.

[0048] The thermometer 17 is connected to the temperature detection probe 18 inside the box, the surface temperature detection probe 19 outside the box, the soil temperature detection probe 20 outside the box, and the air temperature detection probe 21 outside the box via signal lines.

[0049] The internal temperature detection probe 18 is fixed to the partition 5 and is confined within the gas collection chamber.

[0050] The external surface temperature detection probe 19 needs to be placed on the surface to be tested outside the box 1 during use.

[0051] The soil temperature detection probe 20 outside the box needs to be inserted into the soil surface to be tested outside the ground box 1 during use.

[0052] When in use, the external air temperature detection probe 21 needs to be placed outside the ground box 1, the middle box 2, and the top box 4. The external air temperature detection probe 21 can be placed on the top of the top box 4, or it can be detachably fixed to an item outside the static box.

[0053] More specifically, it also includes an agitator fan 23, which is confined within the gas collection chamber and fixed to the partition 5, and is electrically connected to the battery 22.

[0054] More specifically, it also includes a handle 24, which is fixed to the end of the top box 4 away from the insertion tube 6.

[0055] More specifically, it also includes buckle plate 25 and fastener 26. Buckle plate 25 and fastener 26 are compatible. Buckle plate 25 and fastener 26 can be separated by pressing buckle plate 25. Two buckle plates 25 are fixed on the outer walls of top box 4 and middle box 2, and two fasteners 26 are fixed on the outer walls of middle box 2 and ground box 1. The two buckle plates 25 fixed to top box 4 can be snapped onto the two fasteners 26 fixed to middle box 2, and the two buckle plates 25 fixed to middle box 2 can be snapped onto the two fasteners 26 fixed to ground box 1.

[0056] More specifically, it also includes multiple insert teeth 27, which are fixed to the end wall of the ground box 1 away from the middle section box 2. The multiple insert teeth 27 are evenly arranged along the circumferential direction of the ground box 1. The end of the insert teeth 27 away from the ground box 1 is sharpened. The insert teeth 27 can be inserted into the ground to be tested, thereby improving the placement stability of the ground box 1.

[0057] How to use this static box:

[0058] First, insert the ground box 1 into the ground to be tested, and then fill the annular groove 7 fixed to the ground box 1 with sealant 9. After the sealant 9 is filled, fasten the middle section box 2 onto the ground box 1, insert the first tube 3 into the annular groove 7 fixed to the ground box 1 and immerse it in the sealant 9, and ensure that the two fasteners 25 fixed to the middle section box 2 are snapped onto the two fasteners 26 fixed to the ground box 1.

[0059] The second step is to fill the annular groove 7 fixed to the middle section box 2 with sealing liquid 9. After the sealing liquid 9 is filled, the top box 4 is fastened to the middle section box 2, and the second tube 6 is inserted into the annular groove 7 fixed to the middle section box 2 and immersed in the sealing liquid 9. It is also ensured that the two buckle plates 25 fixed to the top box 4 are each snapped onto the two fasteners 26 fixed to the middle section box 2.

[0060] The third step is to place the surface temperature detection probe 19, the soil temperature detection probe 20, and the air temperature detection probe 21 outside the box into their respective positions.

[0061] The fourth step is to connect the outlet pipe 13 to a syringe (not shown in the figure) or an external tool that can extract gas (not shown in the figure) at one end outside the top box 4, and then perform the gas extraction process to remove the original air inside the static box. After a period of time, stop the gas extraction and turn on the thermometer 17 at the same time.

[0062] When the static box has been left to stand for a period of time and it is necessary to extract the gas inside, connect the gas collection bag to the gas outlet pipe 13, turn on the air pump 11 and the stirring fan 23, the air pump 11 inflates the balloon 10, the volume of the balloon 10 increases, the volume inside the static box decreases, and the original gas inside the static box will be discharged into the gas collection bag through the gas outlet pipe 13, thus completing the gas collection. Since the volume of the balloon 10 increases, the gas inside the static box can only be discharged to the outside, and there is no situation where external air enters the static box.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A static chamber for soil gas collection, characterized by, include: Ground box (1), with openings at both ends and one end capable of being sealed and fastened to the ground to be tested; The middle section box (2) has an open end and a closed end. The closed end of the middle section box (2) can be tightly connected to the end of the ground box (1) away from the ground to be tested. The closed end of the middle section box (2) has an opening and is fixed with a tube (3) that communicates with its interior. Top box (4), both ends of top box (4) are closed and a partition (5) is fixed inside it. The partition (5) divides top box (4) into installation cavity and gas collection cavity. One closed end of top box (4) is opened and a second tube (6) connected to the gas collection cavity is fixed. One end of top box (4) with the second tube (6) fixed can be tightly abutted against the open end of middle box (2). The sealing element includes an annular groove (7) with a cross-section in the shape of a door, the annular groove (7) is filled with sealing liquid (9), there are two annular grooves (7) and each is fixed to the inner wall of the ground box (1) and the inner wall of the middle box (2), the first insertion tube (3) can be inserted into the annular groove (7) fixed to the ground box (1) and immersed in the sealing liquid (9), and the second insertion tube (6) can be inserted into the annular groove (7) fixed to the middle box (2) and immersed in the sealing liquid (9); The air extraction assembly includes a balloon (10), an air pump (11), a gas flow meter (12), an air outlet pipe (13), and a one-way valve (14). The balloon (10) is confined within the air collection chamber. The air pump (11) and the gas flow meter (12) are both installed in the mounting chamber. The air outlet of the air pump (11) is connected to the balloon (10) through a pipeline, and the gas flow meter (12) is connected in series between the two. One end of the air outlet pipe (13) is connected to the air collection chamber, and the other end is arranged outside the top box (4). The one-way valve (14) is connected in series on the air outlet pipe (13) and is confined within the mounting chamber. The top box (4) has an air pressure balance hole (40) that is connected to the mounting chamber. When it is necessary to collect gas in the static box, connect the gas collection bag to the gas outlet pipe (13), turn on the air pump (11), the air pump (11) inflates the balloon (10), the volume of the balloon (10) increases, the volume inside the static box decreases, and the original gas inside the static box will be discharged into the gas collection bag through the gas outlet pipe (13). An annular baffle (15) is fixed on the inner wall of the ground box (1), and the bottom wall of an annular groove (7) is fixed to the surface of the annular baffle (15); an annular baffle (16) is fixed on the inner wall of the middle section box (2), and the bottom wall of another annular groove (7) is fixed to the surface of the annular baffle (16).

2. The static chamber for soil gas collection according to claim 1, characterized in that: The sealing element also includes annular arc-shaped baffles (8). An arc-shaped baffle (8) is fixed on each of the two end walls at the opening of the annular groove (7). The two arc-shaped baffles (8) are limited between their arc centers. Both arc-shaped baffles (8) are limited within the annular groove (7). The inner and outer walls of the first insertion tube (3) can respectively abut against the outer arc surfaces of the two arc-shaped baffles (8). The inner and outer walls of the second insertion tube (6) can respectively abut against the outer arc surfaces of the two arc-shaped baffles (8).

3. The static chamber for soil gas collection according to claim 1, wherein: The temperature measuring assembly comprises a temperature measuring meter (17), an in-box temperature detecting probe (18), an out-of-box ground surface temperature detecting probe (19), an out-of-box soil temperature detecting probe (20), and an out-of-box air temperature detecting probe (21). The temperature measuring meter (17) and the storage battery (22) are both installed in the installation cavity. The display screen of the temperature measuring meter (17) and the display screen of the gas flow meter (12) are both fixed on the end of the top box (4) far away from the second insertion pipe (6). The temperature measuring meter (17), the air pump (11), and the gas flow meter (12) are electrically connected with the storage battery (22). The temperature measuring meter (17) is in signal connection with the in-box temperature detecting probe (18), the out-of-box ground surface temperature detecting probe (19), the out-of-box soil temperature detecting probe (20), and the out-of-box air temperature detecting probe (21) respectively. The in-box temperature detecting probe (18) is fixed with the partition plate (5) and is limited in the gas collecting cavity. The out-of-box ground surface temperature detecting probe (19) can be arranged on the to-be-detected ground surface outside the ground box (1). The out-of-box soil temperature detecting probe (20) can be inserted into the to-be-detected ground surface outside the ground box (1). The out-of-box air temperature detecting probe (21) can be arranged outside the ground box (1), the middle section box (2), and the top box (4).

4. The static chamber for soil gas collection according to claim 3, characterized in that: The stirring fan (23) is limited in the gas collecting cavity and is fixed with the partition plate (5). The stirring fan (23) is electrically connected with the storage battery (22).

5. The static chamber for soil gas collection according to claim 1, wherein: The handle (24) is fixed with the end of the top box (4) far away from the second insertion pipe (6).

6. The static chamber for soil gas collection according to claim 1, wherein: The buckle plate (25) and the buckle (26) are matched. A plurality of buckle plates (25) are fixed on the outer walls of the top box (4) and the middle section box (2). A plurality of buckles (26) are fixed on the outer walls of the middle section box (2) and the ground box (1). The plurality of buckle plates (25) fixed with the top box (4) can be respectively clamped and buckled to the plurality of buckles (26) fixed with the middle section box (2). The plurality of buckle plates (25) fixed with the middle section box (2) can be respectively clamped and buckled to the plurality of buckles (26) fixed with the ground box (1).

7. The static chamber for soil gas collection according to claim 1, wherein: The gear tooth (27) is fixed with the end wall of the ground box (1) far away from the middle section box (2). The gear tooth (27) can be inserted into the to-be-detected ground surface.

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