Automatic soil gas collecting device

Abstract

The utility model discloses an automatic soil gas collecting device, which belongs to the technical field of soil gas collection and comprises a collecting box, an inner cavity of the collecting box is divided into an upper gas storage chamber and a lower control chamber by a partition plate, and a sucking pump and a gas collecting box are respectively mounted at the top and the bottom of the inner wall of the control chamber. A strip-shaped groove is formed in the bottom of the collecting box, an inserting part capable of extending towards the side face after being inserted into the ground is rotationally arranged in the strip-shaped groove, and the inserting part is communicated with an inner cavity of the gas collecting box; the inserting part comprises a rotating seat mounted in the strip-shaped groove through a rotating shaft and a gas collecting pipe fixed to one end of the rotating seat, the rotating seat is of a hollow structure, one end of the rotating seat communicates with an inner cavity of the gas collecting box through a telescopic guide pipe, and the gas collecting pipe communicates with an inner cavity of the rotating seat; the automatic soil gas collecting device is novel in structure, convenient to use, wide in collecting range and high in application value.

Description

Technical Field

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

[0002] Soil gas sampling technology is an important means of obtaining key information such as the composition and concentration of gases inside the soil. The collected gas samples, after being analyzed by professional instruments, can provide data on the content of components such as oxygen, carbon dioxide, and methane. This data is of great significance for studying soil microbial activity, soil respiration, soil pollution status, and assessing agricultural soil fertility and ecological health. The sampling process usually requires the use of soil gas sampling devices. Most existing soil gas sampling devices are simply basic structures with a vacuum pump connected to a sampling tube. By inserting the sampling tube into the soil and using the vacuum pump to extract the gas for detection, although they have basic sampling effects, the structure is too simple. When in use, the gas sampling port can only extend vertically and cannot be extended horizontally, resulting in a small coverage area of ​​the collected gas sample. Often, multiple samplings are required. In view of this, this application is made. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing an automatic soil gas collection device that is convenient to use and has a wide collection range.

[0004] An automatic soil gas collection device includes a collection box. The inner cavity of the collection box is divided into an upper gas storage chamber and a lower control chamber by a partition plate. An air pump and a gas collection box are respectively installed on the top and bottom of the inner wall of the control chamber. The air pump's suction port is connected to the gas collection box through a conduit. A strip-shaped groove is provided at the bottom of the collection box. A plug-in part that can be inserted into the ground and extend to the side is rotatably disposed in the strip-shaped groove. The plug-in part is connected to the inner cavity of the gas collection box. When in use, the plug-in part is inserted into the ground. At the same time as the plug-in part is inserted into the ground, the side of the plug-in part will expand simultaneously, so that the plug-in part can not only penetrate vertically into the soil, but also has a certain extension space on the side, thereby increasing the collection range of soil gases.

[0005] Furthermore, the insertion part includes a rotating seat mounted in a strip groove via a rotating shaft and a gas collecting pipe fixed at one end of the rotating seat. The rotating seat is a hollow structure, and one end of the rotating seat is connected to the inner cavity of the gas collecting box via a telescopic conduit. The gas collecting pipe is connected to the inner cavity of the rotating seat. In use, the gas collecting pipe is rotated to a vertical position, and then inserted into the ground to contact the soil gas. By turning on the air pump, the soil gas outside the gas collecting pipe can be drawn in. The gas passes through the gas collecting pipe, the rotating seat, and the telescopic conduit in sequence and enters the gas collecting box, and is then sent into the gas storage chamber by the air pump.

[0006] Furthermore, the side wall of the gas collecting pipe has a concave receiving groove, and a gas collecting plate is rotatably arranged in the receiving groove. The gas collecting plate is used to expand laterally during the insertion of the gas collecting pipe into the soil, thereby expanding the soil gas collection area.

[0007] Furthermore, the sidewall of the gas collecting plate is connected to the inner wall of the receiving groove via a spring. An electromagnet is also provided in the receiving groove. An adsorption plate that can be attracted by the electromagnet is embedded in the gas collecting plate. When the electromagnet is closed, the gas collecting plate expands outward under the action of the spring. In use, the electromagnet remains open when the gas collecting tube is not inserted into the soil, so that the gas collecting plate is attached to the receiving groove. After the gas collecting plate descends to a certain depth in the soil, the electromagnet is closed. The gas collecting plate loses the adsorption effect of the electromagnet and expands outward under the action of the spring. At the same time, with the descent of the gas collecting tube, the gas collecting plate can further expand outward and be inserted horizontally into the soil.

[0008] Furthermore, air inlets are provided on the side walls of both the gas collecting pipe and the gas collecting plate, and solid filter screens are installed inside the air inlets, so that soil gas can be drawn in by the air pump through the air inlets.

[0009] Furthermore, the top of the collection box is equipped with a lifting handle, which has a switch for controlling the opening and closing of the air pump and the electromagnet, so that the operator can simultaneously control the opening of the electromagnet when pressing down the device.

[0010] Furthermore, the gas storage chamber is equipped with a filter for filtering moisture in the air and a gas storage bag connected to the filter via a flexible conduit. The bottom of the filter is connected to the exhaust port of the air pump, which effectively filters moisture in the soil gas and improves gas purity.

[0011] Furthermore, the top of the collection box is provided with two external interfaces for connecting to a gas detector. Both external interfaces are connected to the gas storage bag through flexible conduits. In actual use, the soil gas drawn in by the air pump enters the gas storage bag. The internal volume of the gas storage bag is fixed. After it is full, the air pump is turned off, and the gas storage bag is connected to the external detection instrument through the external interface.

[0012] Furthermore, a limiting plate is fixed at one end of the lifting handle inside the collection box. A pressing plate is fixed on the limiting plate to expel the gas in the gas storage bag. The movement of the lifting handle controls the movement of the limiting plate, thereby pressing down the pressing plate, which flattens the annular gas storage bag below and discharges the gas in the gas storage bag, making it convenient to sample the soil gas separately and send it for testing.

[0013] Beneficial effects:

[0014] This invention uses a plug-in part at the bottom of the collection box that extends laterally after being inserted into the ground as a direct contact component for collecting soil gases. By utilizing the characteristics of the plug-in part, the collection port can be extended horizontally and vertically in the soil simultaneously, thereby effectively increasing the collection area. It is easy to operate and highly practical. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of the present invention;

[0016] Figure 2 This is a half-sectional view of the present invention;

[0017] Figure 3 This is a schematic diagram of the bottom structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the plug-in part in this utility model;

[0019] Figure 5 for Figure 4 Enlarged view of a portion of point A in the middle;

[0020] Figure 6 This is a front view of the insertion part in this utility model.

[0021] In the diagram: 1. Collection box; 2. Divider plate; 3. Gas storage chamber; 4. Control room; 5. Air pump; 6. Gas collection box; 7. Connector; 701. Rotating seat; 702. Telescopic guide tube; 703. Gas collection pipe; 704. Gas collection plate; 705. Spring; 706. Electromagnet; 707. Air inlet; 708. Connecting pipe; 709. Receiving slot; 8. Strip groove; 9. Filter; 10. Lifting handle; 11. External interface; 12. Gas storage bag; 13. Limiting plate; 14. Pressing plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-6As shown, an automatic soil gas collection device includes a collection box 1. The inner cavity of the collection box 1 is divided into an upper gas storage chamber 3 and a lower control chamber 4 by a partition plate 2. An air pump 5 and a gas collection box 6 are respectively installed on the top and bottom of the inner wall of the control chamber 4. The air intake port of the air pump 5 is connected to the gas collection box 6 through a conduit. A strip groove 8 is provided at the bottom of the collection box 1. A plug-in part 7 is rotatably provided in the strip groove 8, which can extend to the side after being inserted into the ground. The plug-in part 7 is connected to the inner cavity of the gas collection box 6.

[0024] The gas storage chamber 3 is equipped with a filter 9 for filtering moisture in the air and a gas storage bag 12 connected to the filter 9 via a flexible conduit. The bottom of the filter 9 is connected to the exhaust port of the air pump 5, which effectively filters the moisture in the soil gas and improves the gas purity. The top of the collection box 1 is equipped with two external interfaces 11 for connecting to a gas detector. Both external interfaces 11 are connected to the gas storage bag 12 via flexible conduits. In actual use, the soil gas drawn in by the air pump 5 enters the gas storage bag 12. The internal volume of the gas storage bag 12 is fixed. After it is full, the air pump 5 is turned off, and the gas storage bag 12 is connected to the external detection instrument through the external interfaces 11.

[0025] In this invention, when not in use, the connector 7 can be stored in the slot 8 to maintain a horizontal position. At this time, the device is relatively regular in shape and highly portable. To ensure the stability of the connector 7 during storage, auxiliary fixing methods can be used to reinforce it, including using a high-damping rotating shaft and adding a buckle structure. When needed, the connector 7 is rotated to a vertical position and then inserted into the ground. As the connector 7 is inserted into the ground, its sides also unfold simultaneously, allowing it to penetrate the soil vertically and also have a certain extension space on the side, thereby increasing the range of soil gas collection. In addition, the collection range is further improved by adding an extra connector 7 at the bottom of the collection box 1. After the connector 7 is inserted into the ground, the air pump 5 is turned on to draw the gas in the soil into the gas collection box 6 and then discharge it into the gas storage chamber 3 for later use. Compared with existing soil gas collection devices, the collection device proposed in this application has a novel structure, is easy to use, has a wide collection range, and has high application value.

[0026] The insertion part 7 includes a rotating seat 701 mounted in the strip groove 8 via a rotating shaft and a gas collecting pipe 703 fixed to one end of the rotating seat 701. The rotating seat 701 is a hollow structure. One end of the rotating seat 701 is connected to the inner cavity of the gas collecting box 6 via a telescopic guide tube 702. The gas collecting pipe 703 is connected to the inner cavity of the rotating seat 701. The telescopic guide tube 702 can effectively adapt to the rotation of the rotating seat 701. The direction of the gas collecting pipe 703 can be adjusted by rotating the rotating seat 701. When not in use, the gas collecting pipe 703 is retracted into the strip groove 8. When in use, it can be rotated to a vertical position. When collecting soil gas, the gas collection pipe 703 is inserted into the ground to contact the soil gas. Then, by turning on the air pump 5, the soil gas outside the gas collection pipe 703 is sucked in. The gas passes through the gas collection pipe 703, the rotating seat 701 and the telescopic conduit 702 in sequence and enters the gas collection box 6. Then, it is sent into the gas storage chamber 3 by the air pump 5. The side wall of the gas collection pipe 703 has a concave receiving groove 709. A gas collecting plate 704 is rotatably installed in the receiving groove 709. The gas collecting plate 704 is used to expand to the side during the process of the gas collection pipe 703 being inserted into the soil, thereby expanding the soil gas collection area.

[0027] The side wall of the gas collecting plate 704 is connected to the inner wall of the receiving groove 709 via a spring 705. An electromagnet 706 is also installed inside the receiving groove 709. An adsorption plate embedded in the gas collecting plate 704 can be attracted by the electromagnet 706. When the electromagnet 706 is closed, the gas collecting plate 704 expands outward under the action of the spring 705. (It should be noted that since the gas collecting plate 704 needs to enter the soil to expand, the expansion force relies solely on the spring 705. Therefore, the spring 705 needs to be made of a high-strength material, such as carbon spring steel, to allow the gas collecting plate 704 to overcome soil pressure and expand outward.) During use, when the gas collecting pipe 703 is not inserted into the soil, the electromagnet 706 remains open, keeping the gas collecting plate 704 close to the receiving groove 709. After the gas collecting plate 704 descends to a certain depth in the soil, the electromagnet 706 is closed. The gas collecting plate 704 loses the adsorption effect of the electromagnet 706 and expands outward under the action of the spring 705, simultaneously releasing the gas collecting plate. As the air tube 703 descends, the gas collecting plate 704 can further expand outward and be inserted laterally into the soil. Both the air collecting tube 703 and the gas collecting plate 704 have air inlets 707 on their side walls. A solid filter screen is installed inside the air inlet 707, allowing soil gas to be drawn in by the air pump 5 through the air inlet 707. The top of the collection box 1 is equipped with a lifting handle 10, which has a switch for controlling the opening and closing of the air pump 5 and the electromagnet 706. This allows the operator to simultaneously control the opening of the electromagnet 706 when pressing down the device. A limit plate 13 is fixed to one end of the lifting handle 10 inside the collection box 1. A pressing plate 14 is fixed to the limit plate 13 to press out the gas in the gas storage bag 12. The movement of the lifting handle 10 controls the movement of the limit plate 13, which in turn presses down the pressing plate 14, thereby flattening the annular gas storage bag 12 below and expelling the gas in the gas storage bag 12. This facilitates the separate sampling and testing of soil gas.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic soil gas collection device, comprising a collection box (1), wherein the inner cavity of the collection box (1) is divided into an upper gas storage chamber (3) and a lower control chamber (4) by a partition plate (2), wherein a suction pump (5) and a gas collection box (6) are respectively installed on the top and bottom of the inner wall of the control chamber (4), and the suction port of the suction pump (5) is connected to the gas collection box (6) through a conduit, characterized in that: The bottom of the collection box (1) is provided with a strip groove (8), and a plug part (7) is rotatably provided in the strip groove (8) that can extend to the side after being inserted into the ground. The plug part (7) is connected to the inner cavity of the gas collection box (6).

2. The automatic soil gas collection device as described in claim 1, characterized in that: The insertion part (7) includes a rotating seat (701) installed in the strip groove (8) via a rotating shaft and an air collecting pipe (703) fixed at one end of the rotating seat (701). The rotating seat (701) is a hollow structure. One end of the rotating seat (701) is connected to the inner cavity of the air collecting box (6) via a telescopic conduit (702). The air collecting pipe (703) is connected to the inner cavity of the rotating seat (701).

3. The automatic soil gas collection device as described in claim 2, characterized in that: The side wall of the gas collecting pipe (703) has a concave receiving groove (709), and a gas collecting plate (704) is rotatably disposed in the receiving groove (709).

4. The automatic soil gas collection device as described in claim 3, characterized in that: The side wall of the gas collecting plate (704) is connected to the inner wall of the receiving groove (709) by a spring (705). An electromagnet (706) is also provided in the receiving groove (709). An adsorption plate that can be attracted by the electromagnet (706) is embedded in the gas collecting plate (704). After the electromagnet (706) is closed, the gas collecting plate (704) expands outward under the action of the spring (705).

5. The automatic soil gas collection device as described in claim 4, characterized in that: Both the gas collecting pipe (703) and the gas collecting plate (704) have air inlets (707) on their side walls, and a solid filter screen is provided inside the air inlets (707).

6. The automatic soil gas collection device as described in claim 5, characterized in that: The top of the collection box (1) is provided with a lifting handle (10), and the lifting handle (10) is provided with a switch for controlling the opening and closing of the air pump (5) and the electromagnet (706).

7. The automatic soil gas collection device as described in claim 6, characterized in that: The air storage chamber (3) is equipped with a filter (9) for filtering moisture in the air and an air storage bag (12) connected to the filter (9) via a soft conduit. The bottom of the filter (9) is connected to the exhaust port of the air pump (5).

8. The automatic soil gas collection device as described in claim 7, characterized in that: The top of the collection box (1) is provided with two external interfaces (11) for connecting to the gas detector. Both external interfaces (11) are connected to the gas storage bag (12) through soft conduits.

9. The automatic soil gas collection device as described in claim 8, characterized in that: The lifting handle (10) is fixed with a limiting piece (13) at one end inside the collection box (1), and a pressing piece (14) that can press out the gas in the gas storage bag (12) is fixed on the limiting piece (13).

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