Gas collecting device for rapidly detecting volatile organic compounds in soil

Abstract

The utility model belongs to the technical field of soil gas collection and detection, and discloses a gas collection device for rapid detection of volatile organic compounds in soil, the gas collection device comprises a collection pipe, and further comprises a collection mechanism arranged on the collection pipe and used for collecting volatile gas in the soil, the collection mechanism comprises a collection rod slidably connected in the collection pipe, and the collection rod is arranged on the collection pipe. The end, located in the collecting pipe, of the collecting rod is fixedly connected with a collecting plate, and the other end of the collecting rod is fixedly connected with a pulling plate. According to the gas collecting device for rapidly detecting the volatile organic compounds in the soil, through the arrangement of the collecting mechanism, a U-shaped vent hole of a volatile gas inlet channel is moved out of the collecting pipe, the initial state of the U-shaped vent hole is located in the collecting pipe, and under the blocking action of an extrusion plate, external gas is prevented from entering the collecting pipe, so that the volatile organic compounds in the volatile gas inlet channel are rapidly detected. Therefore, external air is prevented from being mixed in.

Description

Technical Field

[0001] The utility model relates to the technical field of soil gas collection and detection, and particularly relates to a gas collection device for rapid detection of soil volatile organic compounds. Background Art

[0002] Pollutants in soil gas are usually difficult to directly judge by smell. There is a certain distribution relationship between most organic pollutants and some heavy metal pollutants in soil and soil gas. Therefore, by collecting and analyzing the concentration of pollutants in soil gas, the distribution of pollutants in the solid and liquid phases can be effectively inferred.

[0003] In the prior art, first, soil samples are collected, and then the soil samples are stirred and crushed in the laboratory to make the internal volatile gases overflow, so as to realize the collection and detection of volatile gases in the soil. For example, the authorized publication number is CN212301413U, a gas collection device for rapid detection of soil volatile organic compounds. However, during the collection, storage of soil samples and the placement of experimental instruments, external gases are likely to mix in, thus affecting the accuracy of the detection of volatile gases in the soil. Summary of the Utility Model

[0004] In order to solve the above problems, the utility model provides a gas collection device for rapid detection of soil volatile organic compounds.

[0005] The above technical purpose of the utility model is achieved by the following technical scheme: A gas collection device for rapid detection of soil volatile organic compounds, including a collection tube, and further including a collection mechanism arranged on the collection tube for collecting volatile gases in the soil;

[0006] The collection mechanism includes a collection rod slidably connected in the collection tube. One end of the collection rod located inside the collection tube is fixedly connected with a collection plate, the other end of the collection rod is fixedly connected with a pulling plate, and an extrusion mechanism for extruding the volatile gases in the soil is arranged in the collection tube.

[0007] By adopting the above technical scheme, the mixing of external gases is avoided, and the accuracy of the detection of volatile gases in the soil is ensured.

[0008] Furthermore, a conical head is fixedly connected to one end of the collection tube away from the pulling plate.

[0009] By adopting the above technical scheme, it is convenient for the collection tube to be inserted into the soil.

[0010] Furthermore, a release mechanism for releasing volatile gases is provided on the collection pipe. The release mechanism includes a release pipe provided on the side wall of the collection pipe. The release pipe is made of a flexible material, and a control valve is provided on the side wall of the release pipe.

[0011] By adopting the above technical solution, it is convenient to release and detect the gases in the collection pipe.

[0012] Furthermore, the extrusion mechanism includes a plurality of extrusion grooves annularly arrayed on the side wall of the collection pipe. An extrusion plate is slidably connected in each extrusion groove, and a driving mechanism for driving each extrusion plate is provided in the collection pipe.

[0013] By adopting the above technical solution, the gases in the soil are forced to be discharged outwards, thus facilitating the collection of volatile gases in the soil.

[0014] Furthermore, the driving mechanism includes a driving plate slidably connected in the collection pipe. A rotating plate is rotatably connected to one side of the driving plate close to the collection plate. A pushing plate is slidably connected to the collection pipe. One end of the pushing plate is connected to the extrusion plate, and the other end of the pushing plate is rotatably connected to the rotating plate.

[0015] By adopting the above technical solution, the mutual approach or separation movement of each extrusion plate is realized.

[0016] Furthermore, a U-shaped ventilation hole is provided on one side of the pushing plate close to the collection plate, and a filter plate is provided at one end of the U-shaped ventilation hole close to the extrusion plate.

[0017] By adopting the above technical solution, the volatile gases in the soil will enter the collection pipe from the U-shaped ventilation hole. And the U-shaped ventilation hole is initially located inside the collection pipe and is blocked by the extrusion plate, preventing external gases from entering the collection pipe, thus avoiding the mixing of external gases.

[0018] Furthermore, a moving component for moving the driving plate is provided on the collection pipe. The moving component includes a fixing plate fixedly connected to the inner wall of the collection pipe. A threaded rod is rotatably connected to one side of the fixing plate away from the collection plate. The driving plate is threadedly connected to the side wall of the threaded rod. A motor is provided on the bottom wall of the collection pipe, and the output end of the motor is connected to the threaded rod.

[0019] By adopting the above technical solution, the driving plate is driven to move in the collection pipe.

[0020] Furthermore, a guiding component for guiding the movement of the driving plate is provided on the collecting pipe. The guiding component includes two symmetrically arranged guiding grooves formed on the inner wall of the collecting pipe. A guiding plate is slidably connected to the two guiding grooves, and one end of the two guiding plates facing each other is connected to the driving plate.

[0021] By adopting the above technical solution, it provides guiding and limiting effects for the movement of the driving plate.

[0022] To sum up, the utility model has the following beneficial effects:

[0023] In the gas collection device for rapid detection of soil volatile organic compounds in this application, through the setting of the collection mechanism, under the extrusion action of the extrusion mechanism, while forcing the gas in the soil to be discharged outward, the U-shaped vent hole of the volatile gas intake passage is moved out of the collecting pipe. By using the movement of the collecting plate, under the action of air pressure, the volatile gas in the soil is inhaled into the collecting pipe, and the initial state of the U-shaped vent hole is located inside the collecting pipe, and under the blocking action of the extrusion plate, the external gas is prevented from entering the collecting pipe, thereby avoiding the mixing of external gas and ensuring the accuracy of the detection of volatile gas in the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the overall structural schematic diagram of the embodiment of the utility model;

[0025] Figure 2 is the internal structural schematic diagram of the extrusion mechanism of the embodiment of the utility model;

[0026] Figure 3 is Figure 2 the enlarged schematic diagram of part A in

[0027] Figure 4 is the internal structural schematic diagram of the vent hole of the embodiment of the utility model.

[0028] In the figure: 1, collecting pipe; 201, collecting rod; 202, collecting plate; 203, pulling plate; 204, conical head; 301, release pipe; 302, control valve; 401, extrusion groove; 402, extrusion plate; 501, driving plate; 502, rotating plate; 503, pushing plate; 504, U-shaped vent hole; 505, filter plate; 601, fixing plate; 602, threaded rod; 603, motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0030] Embodiment 1

[0031] Please refer to Figures 1 - 4 , a gas collection device for rapid detection of soil volatile organic compounds in the figure, including a collection tube 1, and further including a collection mechanism arranged on the collection tube 1 for collecting volatile gases in the soil;

[0032] The collection mechanism includes a collection rod 201 slidably connected in the collection tube 1. One end of the collection rod 201 located inside the collection tube 1 is fixedly connected with a collection plate 202, and the other end of the collection rod 201 is fixedly connected with a pulling plate 203. An extrusion mechanism for extruding the volatile gases in the soil is arranged in the collection tube 1;

[0033] It should be noted here that: through the setting of the collection mechanism, under the extrusion action of the extrusion mechanism, while forcing the gas in the soil to be discharged outward, the U-shaped ventilation hole 504 of the volatile gas intake channel is moved out of the collection tube 1. By using the movement of the collection plate 202, under the action of air pressure, the volatile gases in the soil are inhaled into the collection tube 1. And the initial state of the U-shaped ventilation hole 504 is located inside the collection tube 1, and under the blocking action of the extrusion plate 402, the external gas is prevented from entering the collection tube 1, thereby avoiding the mixing of external gases and ensuring the accuracy of the detection of volatile gases in the soil.

[0034] It should be noted that: for the specific detection method and principle of the PID detector for detecting soil volatile gases, please refer to the authorized publication number CN212301413U, a gas collection device for rapid detection of soil volatile organic compounds, which will not be elaborated here.

[0035] Please refer to Figure 1 and Figure 2 , one end of the collection tube 1 away from the pulling plate 203 in the figure is fixedly connected with a conical head 204;

[0036] It should be noted here that: through the setting of the conical head 204, it is convenient to insert the collection tube 1 into the soil.

[0037] Please refer to Figure 1 and Figure 2, a release mechanism for releasing volatile gases is provided on the collection pipe 1 in the illustration. The release mechanism includes a release pipe 301 provided on the side wall of the collection pipe 1. The release pipe 301 is made of a flexible material, and a control valve 302 is provided on the side wall of the release pipe 301;

[0038] It should be noted here that: through the setting of the release mechanism, it is convenient to release and detect the gas in the collection pipe 1.

[0039] Working principle: When collecting volatile gases in the soil, first insert the collection pipe 1 into the soil using the conical head 204, then use the extrusion mechanism to extrude the inside of the soil, and make the volatile gas intake channel U-shaped vent hole 504 move out of the collection pipe 1. Finally, pull the pull plate 203 to drive the collection plate 202 at one end of the collection rod 201 to move inside the collection pipe 1. Thus, by the movement of the collection plate 202, under the action of air pressure, the volatile gases in the soil are inhaled into the collection pipe 1, and the initial state of the U-shaped vent hole 504 is inside the collection pipe 1, and under the blocking action of the extrusion plate 402, external gases are prevented from entering the collection pipe 1, thereby avoiding the mixing of external gases and ensuring the accuracy of the detection of volatile gases in the soil;

[0040] When the collection plate 202 moves above the connection between the release pipe 301 and the collection pipe 1, the detection end of the PID detector can be inserted into the release pipe 301, and the control valve 302 is opened, thereby realizing the detection of volatile gases in the soil.

[0041] Embodiment 2

[0042] Please refer to Figure 3 and Figure 4 , this embodiment further explains Embodiment 1. The extrusion mechanism in the illustration includes a plurality of extrusion grooves 401 arranged in an annular array on the side wall of the collection pipe 1. An extrusion plate 402 is slidably connected in each extrusion groove 401, and a driving mechanism for driving each extrusion plate 402 is provided inside the collection pipe 1;

[0043] It should be noted here that: through the setting of the extrusion mechanism, under the driving action of the driving mechanism, each extrusion plate 402 will be pushed to move away from each other. Thus, during the process of the extrusion plates 402 moving away from each other, the soil is extruded. When pressure is applied to the soil, the voids between soil particles will be compressed, the pore volume will decrease, and thus the gases in the soil will be forced to be discharged outward, thereby facilitating the collection of volatile gases in the soil.

[0044] Please refer to Figure 3 and Figure 4, the drive mechanism in the figure includes a drive plate 501 slidably connected in the collection tube 1. A rotating plate 502 is rotatably connected to one side of the drive plate 501 close to the collection plate 202. A push plate 503 is slidably connected to the collection tube 1. One end of the push plate 503 is connected to the extrusion plate 402, and the other end of the push plate 503 is rotatably connected to the rotating plate 502;

[0045] It should be noted here that: through the setting of the drive mechanism, under the action of the moving component, the drive plate 501 is driven to move in the collection tube 1, thereby driving the rotating plate 502 to rotate, and further pushing each push plate 503 to move closer to or away from each other, so as to realize the movement of each extrusion plate 402 closer to or away from each other.

[0046] Please refer to Figure 3 and Figure 4 , a U-shaped ventilation hole 504 is opened on one side of the push plate 503 in the figure close to the collection plate 202, and a filter plate 505 is provided at one end of the U-shaped ventilation hole 504 close to the extrusion plate 402;

[0047] It should be noted here that: through the setting of the U-shaped ventilation hole 504, when the push plate 503 is moved out of the collection tube 1, the volatile gas in the soil will enter the collection tube 1 from the U-shaped ventilation hole 504, and the U-shaped ventilation hole 504 is initially located inside the collection tube 1, and under the blocking action of the extrusion plate 402, it prevents external gas from entering the collection tube 1, thus avoiding the mixing of external gas.

[0048] Please refer to Figure 3 and Figure 4 , a moving component for moving the drive plate 501 is provided on the collection tube 1 in the figure. The moving component includes a fixing plate 601 fixedly connected to the inner wall of the collection tube 1. A threaded rod 602 is rotatably connected to one side of the fixing plate 601 away from the collection plate 202. The drive plate 501 is threadedly connected to the side wall of the threaded rod 602. A motor 603 is provided on the bottom wall of the collection tube 1, and the output end of the motor 603 is connected to the threaded rod 602;

[0049] It should be noted here that: through the setting of the moving component, by the threaded meshing transmission action of the threaded rod 602 and the drive plate 501 and the guiding action of the guiding component, the drive plate 501 will be driven to move in the collection tube 1.

[0050] Please refer to Figure 3 and Figure 4 , a guiding component for guiding the movement of the drive plate 501 is provided on the collection tube 1 in the figure. The guiding component includes two symmetrically arranged guiding grooves opened on the inner wall of the collection tube 1. A guiding plate is slidably connected to the two guiding grooves, and one end of the two guiding plates opposite to each other is connected to the drive plate 501;

[0051] It should be noted here that: through the setting of the guiding component, it provides guiding and limiting functions for the movement of the driving board 501.

[0052] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A gas collection device for rapid detection of volatile organic compounds in soil, comprising: Collection tube (1); Its characteristics include: A collecting mechanism arranged on the collecting pipe (1) for collecting volatile gases in the soil; The collecting mechanism comprises a collecting rod (201) slidably connected in the collecting pipe (1); one end of the collecting rod (201) located inside the collecting pipe (1) is fixedly connected to a collecting plate (202); the other end of the collecting rod (201) is fixedly connected to a pulling plate (203); and a squeezing mechanism for squeezing volatile gases in the soil is provided in the collecting pipe (1).

2. The gas collection device for rapid detection of volatile organic compounds in soil according to claim 1, characterized in that: One end of the collecting pipe (1) away from the pulling plate (203) is fixedly connected to a conical head (204).

3. The gas collection device for rapid detection of volatile organic compounds in soil according to claim 1, characterized in that: The collecting pipe (1) is provided with a release mechanism for releasing volatile gas, the release mechanism comprising a release pipe (301) arranged on the side wall of the collecting pipe (1), the release pipe (301) being made of a flexible material, and a control valve (302) being provided on the side wall of the release pipe (301).

4. The gas collection device for rapid detection of volatile organic compounds in soil according to claim 1, characterized in that: The extrusion mechanism comprises a plurality of extrusion grooves (401) arranged in a circular array on the side wall of the collection tube (1), each of the extrusion grooves (401) being slidably connected with an extrusion plate (402), and a driving mechanism for driving each extrusion plate (402) is provided in the collection tube (1).

5. The gas collection device for rapid detection of volatile organic compounds in soil according to claim 4, characterized in that: The driving mechanism comprises a driving plate (501) slidably connected in the collection tube (1); a side of the driving plate (501) close to the collection plate (202) is rotatably connected to a rotating plate (502); a pushing plate (503) is slidably connected to the collection tube (1); one end of the pushing plate (503) is connected to the extrusion plate (402), and the other end of the pushing plate (503) is rotatably connected to the rotating plate (502).

6. The gas collection device for rapid detection of volatile organic compounds in soil according to claim 5, characterized in that: A U-shaped vent hole (504) is provided on one side of the push plate (503) close to the collecting plate (202), and a filter plate (505) is provided on one end of the U-shaped vent hole (504) close to the squeezing plate (402).

7. The gas collection device for rapid detection of volatile organic compounds in soil according to claim 5, characterized in that: The collecting tube (1) is provided with a moving assembly for moving the driving plate (501), the moving assembly comprising a fixing plate (601) fixedly connected to the inner wall of the collecting tube (1), a threaded rod (602) being rotatably connected to a side of the fixing plate (601) away from the collecting plate (202), the driving plate (501) being threadedly connected to a side wall of the threaded rod (602), a motor (603) being provided on the bottom wall of the collecting tube (1), and an output end of the motor (603) being connected to the threaded rod (602).

8. The gas collection device for rapid detection of volatile organic compounds in soil according to claim 5, characterized in that: The collecting tube (1) is provided with a guide assembly for guiding the movement of the driving plate (501), the guide assembly comprising two guide grooves symmetrically arranged on the inner wall of the collecting tube (1), guide plates being slidably connected to the two guide grooves, and opposite ends of the two guide plates being connected to the driving plate (501).

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