Underground water sampling device

Abstract

The utility model belongs to the technical field of sampling equipment, and particularly discloses an underground water sampling device which comprises a sampling pipe body, a water inlet assembly and a water drainage assembly, and the sampling pipe body is provided with a first end and a second end in the axial direction of the sampling pipe body; the water inlet assembly is arranged at the first end, and the water inlet assembly is provided with a one-way liquid inlet; the drainage assembly is arranged at the second end and provided with a one-way liquid outlet. The underground water sampling device disclosed by the utility model is beneficial to ensuring the sampling quality, does not need external force to drive sampling, and can be convenient for field sampling.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sampling equipment technical field, concretely relates to a groundwater sampling device. BACKGROUND

[0002] Water chemical analysis is an important means of hydrogeological survey, and the quality of obtained water chemical samples is an important basis for ensuring test results. Underground water sampling points are mainly water wells, springs and drill holes. It is difficult to obtain underground water in drill holes, especially in old drill holes, and the sampling process is difficult and the sample quality cannot be guaranteed.

[0003] The sampling device in the related art realizes accurate depth sampling by the combination of mechanical and electronic control, and reduces the error of manual operation. However, in the field environment, the maintenance cost of the equipment is high, and even the equipment is disturbed by environmental factors, which is easy to pollute the underground water sample. SUMMARY

[0004] The utility model aims at at least in a certain extent solve one of the technical problems in the related art. Therefore, the embodiment of the utility model proposes a groundwater sampling device, which is beneficial to guarantee the sampling quality, does not need external force to drive sampling, and can facilitate field sampling.

[0005] The groundwater sampling device of the utility model embodiment comprises a sampling pipe body, a water inlet assembly and a drainage assembly, the sampling pipe body has a first end and a second end along its axial direction, the water inlet assembly is arranged at the first end, the water inlet assembly has a one-way liquid inlet, the drainage assembly is arranged at the second end, and the drainage assembly has a one-way liquid outlet.

[0006] When sampling is needed, the water inlet assembly of the groundwater sampling device is placed downward into the sampling hole, the water in the drill hole enters the sampling pipe body through the water inlet assembly, and the water in the drill hole can only enter the sampling pipe body from the one-way liquid inlet and cannot be discharged through the water inlet assembly. After the sampling pipe body is filled with water, the water at the second end can be discharged from the one-way liquid outlet of the drainage assembly, so that the floating material floating on the surface of the sampling hole and first entering the sampling pipe body can be discharged, which is beneficial to guarantee the sampling quality, and the groundwater sampling device can sink underwater in the sampling hole by its own gravity and can be sampled without external force, which is convenient for field sampling.

[0007] In the embodiment, the water inlet assembly comprises: a liquid inlet pipe body connected with the first end; a first one-way valve part arranged in the liquid inlet pipe body, the first one-way valve part communicates the liquid inlet pipe body and the sampling pipe body when liquid is inletted; and a filter part arranged in the liquid inlet pipe body and located at the liquid inlet side of the one-way valve part.

[0008] In the embodiment, the first one-way valve component comprises a first baffle plate arranged in the liquid inlet pipe body, a one-way liquid inlet arranged on the first baffle plate to connect the liquid inlet pipe body and the sampling pipe body, a first valve seat arranged on a side of the first baffle plate facing the sampling pipe body, a first elastic member with one end connected to the first valve seat, and a first valve plate connected to the other end of the first elastic member and capable of blocking the one-way liquid inlet under the drive of the first elastic member.

[0009] In the embodiment, the first valve seat comprises a first side plate and a first cover plate, the first side plate is arranged around the first cover plate in the circumferential direction, one end of the first side plate away from the first cover plate is connected to the first baffle plate, and a first liquid outlet is arranged on the first side plate.

[0010] In the embodiment, the filter component comprises a second baffle plate arranged in the liquid inlet pipe body, a side liquid inlet and a second liquid outlet arranged on the pipe wall of the liquid inlet pipe body in opposite directions, the side liquid inlet is arranged on a side of the second baffle plate facing the drainage assembly, and the second liquid outlet is arranged on a side of the second baffle plate away from the drainage assembly.

[0011] In the embodiment, the second baffle plate is arranged in a radial direction of the liquid inlet pipe body and is inclined, and in the axial direction of the liquid inlet pipe body, the side liquid inlet is arranged on a side of the second liquid outlet away from the first baffle plate.

[0012] In the embodiment, the filter component further comprises a filter screen arranged at the side liquid inlet.

[0013] In the embodiment, the liquid inlet pipe body and the sampling pipe body are threadedly connected.

[0014] In the embodiment, the drainage assembly comprises a liquid outlet pipe body connected to the second end, and a second one-way valve component arranged in the liquid outlet pipe body, the second one-way valve component connects the liquid outlet pipe body and the sampling pipe body during liquid discharge.

[0015] In the embodiment, the groundwater sampling device further comprises a lifting member arranged in the drainage assembly. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a sectional structure schematic view of the groundwater sampling device of the embodiment of the utility model.

[0017] Figure 2 is Figure 1 is an enlarged view of A in FIG.

[0018] Figure 3 is Figure 1 is

[0019] Reference signs:

[0020] 1, sampling tube body;

[0021] 2, water inlet assembly; 21, one-way liquid inlet; 22, liquid inlet tube body; 221, side liquid inlet; 222, second liquid outlet; 23, first one-way valve part; 231, first baffle; 232, first valve seat; 2321, first liquid outlet; 233, first elastic member; 234, first valve plate; 24, filter part; 241, second baffle; 242, filter screen;

[0022] 3, water outlet assembly; 31, one-way liquid outlet; 32, liquid outlet tube body; 33, second one-way valve part; 331, third baffle; 332, second valve seat; 3321, overflow port; 333, second elastic member; 334, second valve plate;

[0023] 4, lifting piece. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0025] In the present embodiment, as shown in Figure 1 the underground water sampling device comprises a sampling tube body 1, a water inlet assembly 2, and a water outlet assembly 3. The sampling tube body 1 has a first end and a second end along its axial direction. The water inlet assembly 2 is arranged at the first end, and the water inlet assembly 2 has a one-way liquid inlet 21. The water outlet assembly 3 is arranged at the second end, and the water outlet assembly 3 has a one-way liquid outlet 31.

[0026] Specifically, the sampling tube body 1 can be a stainless steel sampling tube body 1. The stainless steel sampling tube body 1 is corrosion-resistant and not prone to rust, which can avoid pollution of the sampling tube body 1 itself to the water sample, and make the sampling tube body 1 have a relatively heavy weight, so as to facilitate sinking into the liquid to be sampled and facilitate sampling. Similarly, the water inlet assembly 2 and the water outlet assembly 3 can also be made of stainless steel. Of course, those skilled in the art can also set the sampling tube body 1, the water inlet assembly 2, and the water outlet assembly 3 to other materials that meet the requirements, which are not limited herein.

[0027] When sampling is needed, the water inlet assembly 2 of the underground water sampling device is placed downward into the sampling hole, the water in the borehole enters the sampling tube body 1 through the water inlet assembly 2, and the water in the borehole can only enter the sampling tube body 1 from the one-way inlet 21 and cannot be discharged through the water inlet assembly 2. After the sampling tube body 1 is filled with water, the water at the second end can be discharged from the one-way outlet 31 of the water outlet assembly 3, so that the floating objects floating on the surface of the sampling hole and first entering the sampling tube body 1 can be discharged, which is beneficial to ensure the sampling quality, and the underground water sampling device can sink underwater in the sampling hole by gravity and can be used for sampling without external driving, which is convenient for field sampling.

[0028] In the embodiment, as shown in Figure 1 , the water inlet assembly 2 includes a liquid inlet pipe body 22, a first one-way valve part 23 and a filter part 24. The liquid inlet pipe body 22 is connected with the first end. The first one-way valve part 23 is arranged in the liquid inlet pipe body 22. The first one-way valve part 23 communicates the liquid inlet pipe body 22 and the sampling tube body 1 during liquid inlet. The filter part 24 is arranged in the liquid inlet pipe body 22 and located at the liquid inlet side of the one-way valve part.

[0029] It can be understood that when sampling is performed, the water in the sampling hole can enter the inside of the sampling tube body 1 through the filter part 24 and the first one-way valve part 23 in sequence. The filter part 24 can filter the water sample to improve the sampling quality. The first one-way valve part 23 can make the water in the sampling hole enter the sampling tube body 1 and can avoid the water in the sampling tube body 1 being discharged through the water inlet assembly 2 to achieve sampling.

[0030] In the embodiment, as shown in Figure 1 and Figure 2 , the first one-way valve part 23 includes a first baffle 231, a first valve seat 232, a first elastic member 233 and a first valve plate 234. The first baffle 231 is arranged in the liquid inlet pipe body 22. The one-way inlet 21 is arranged on the first baffle 231 to communicate the liquid inlet pipe body 22 and the sampling tube body 1. The first valve seat 232 is arranged on the side of the first baffle 231 facing the sampling tube body 1. One end of the first elastic member 233 is connected with the first valve seat 232. The first valve plate 234 is connected with the other end of the first elastic member 233 and can block the one-way inlet 21 under the drive of the first elastic member 233.

[0031] For example, the first elastic member 233 is a spring, and the axial direction of the first elastic member 233 is parallel to the axial direction of the sampling tube body 1. Of course, the first elastic member 233 can also be arranged in other forms, which is not limited herein.

[0032] It should be noted that when the water inlet assembly 2 is not placed underwater, the first valve piece 234 abuts against the first baffle plate 231 under the elastic force of the first elastic member 233 to block the one-way liquid inlet 21 by the first valve piece 234; when the water inlet assembly 2 is placed underwater, the first valve piece 234 moves towards the water outlet assembly 3 under the pressure of water, the first elastic member 233 contracts, the one-way liquid inlet 21 is communicated with the liquid inlet pipe body 22 and the sampling pipe body 1, and water in the liquid inlet pipe body 22 can enter the sampling pipe body 1 through the one-way liquid inlet 21 to be sampled. The first valve seat 232 is arranged to facilitate the installation of the first elastic member 233.

[0033] In the embodiment, as shown in Figure 2 The first valve seat 232 includes a first side plate and a first cover plate, the first side plate surrounds the first cover plate in the circumferential direction, and one end of the first side plate away from the first cover plate is connected with the first baffle plate 231, and the first side plate is provided with a first liquid outlet 2321.

[0034] For example, the first cover plate is circular, and the first side plate is a cylindrical structure, so that the first valve seat 232 and the first baffle plate 231 surround the second installation cavity, and the one-way liquid inlet 21 is communicated with the second installation cavity. The first side plate and the first cover plate can be welded or integrally formed, which is not limited herein. One or more first liquid outlets 2321 can be arranged on the first side plate, and when multiple first liquid outlets 2321 are arranged, the sampling efficiency can be improved. The number of the first liquid outlets 2321 can be arranged as required, which is not limited herein.

[0035] It should be noted that water enters the first installation cavity surrounded by the first valve seat 232 and the first baffle plate 231 through the one-way liquid inlet 21, and then enters the sampling pipe body 1 through the first liquid outlet 2321 on the first side plate, and some impurities can be further blocked by the first valve seat 232 to improve the quality of the water sample entering the sampling pipe body 1.

[0036] In the embodiment, as shown in Figure 1 and Figure 2 The filter component 24 includes a second baffle plate 241, which is arranged in the liquid inlet pipe body 22, and the liquid inlet pipe body 22 is provided with oppositely arranged side liquid inlets 221 and second liquid outlets 222, and the side liquid inlets 221 are located on the side of the second baffle plate 241 facing the water outlet assembly 3, and the second liquid outlets 222 are located on the side of the second baffle plate 241 away from the water outlet assembly 3.

[0037] Specifically, the second baffle 241 is located on the side of the first baffle 231 away from the sampling tube body 1 and is arranged in a spaced manner with the first baffle 231 to form a liquid inlet cavity between the first baffle 231 and the second baffle 241 in the liquid inlet tube body 22, so that the water sample enters the liquid inlet cavity through the side liquid inlet port 221 and exerts pressure on the first valve plate 234 in the liquid inlet cavity to open the one-way liquid inlet port 21. In addition, the end of the liquid inlet tube body 22 away from the sampling tube body 1 is annular, the liquid inlet tube body 22 has small resistance when entering the water body, and can also combine the gravity of the whole to dredge the silt in the sampling hole, so as to be applicable to sampling in sampling holes under different working conditions and improve the application range.

[0038] When sampling, the bottom of the liquid inlet tube body 22 first contacts the water surface in the sampling hole, and as the liquid inlet tube body 22 penetrates into the water body, the impurities floating in the water body enter the inside of the liquid inlet tube body 22 through the end of the liquid inlet tube body 22 and are discharged from the second liquid outlet port 222 on the liquid inlet tube body 22, and at the same time, the water body can enter the liquid inlet tube body 22 above the second baffle 241 through the side liquid inlet port 221 and open the one-way liquid inlet port 21 under the action of pressure to sample, and the side liquid inlet port 221 and the second liquid outlet port 222 are arranged oppositely, which can effectively reduce the impurities floating from the side liquid inlet port 221 into the liquid inlet tube body 22, and is beneficial to improve the sampling quality.

[0039] In the embodiment, as shown in Figure 1 and Figure 2 , the second baffle 241 is arranged in a radial direction of the liquid inlet tube body 22, and in the axial direction of the liquid inlet tube body 22, the side liquid inlet port 221 is located on the side of the second liquid outlet port 222 away from the first baffle 231.

[0040] It can be understood that the side liquid inlet port 221 is located on the side of the second liquid outlet port 222 away from the first baffle 231, that is, when sampling, the side liquid inlet port 221 is located below the second liquid outlet port 222, the impurities on the surface of the sampling hole enter the liquid inlet tube body 22 through the port below the liquid inlet tube body 22, and as the liquid inlet tube body 22 penetrates, the water in the sampling hole enters the liquid inlet tube body 22 above the second baffle 241 through the side liquid inlet port 221, and the water body with floating impurities is discharged through the second liquid outlet port 222, and the side liquid inlet port 221 is below and the second liquid outlet port 222 is above, which can avoid the liquid with floating impurities discharged from the second liquid outlet port 222 from entering the liquid inlet tube body 22 above the second baffle 241 from the side liquid inlet port 221 after being discharged from the second liquid outlet port 222, and is beneficial to further improve the sampling quality.

[0041] In the embodiment, as shown in Figure 1 and Figure 2 , the filter member 24 further comprises a filter screen 242, and the filter screen 242 is arranged at the side liquid inlet port 221.

[0042] Specifically, the filter screen 242 is fixed to the liquid inlet pipe body 22, and the fixing manner of the filter screen 242 is a conventional prior art, which will not be described in detail herein.

[0043] It can be understood that the filter screen 242 is arranged at the side liquid inlet 221, and the filter screen 242 can filter the water entering the liquid inlet pipe body 22 from the side liquid inlet 221, so that the sampling quality can be improved.

[0044] In the embodiment, as shown in Figure 1 and Figure 2 , the liquid inlet pipe body 22 is threadedly connected with the sampling pipe body 1.

[0045] For example, the liquid inlet pipe body 22 is provided with external threads adjacent to one end of the sampling pipe body 1, and the sampling pipe body 1 is provided with internal threads corresponding to the liquid inlet pipe body 22, so that the liquid inlet pipe body 22 is threadedly connected with the sampling pipe body 1 through the cooperation of the internal threads and the external threads. Of course, the internal threads can also be arranged on the liquid inlet pipe body 22, and the external threads can be arranged on the sampling pipe body 1, which is not limited herein.

[0046] It can be understood that the liquid inlet pipe body 22 is threadedly connected with the sampling pipe body 1, so that the connection of the liquid inlet pipe body 22 and the sampling pipe body 1 is more convenient.

[0047] In the embodiment, as shown in Figure 1 and Figure 3 , the drainage assembly 3 comprises a liquid outlet pipe body 32 and a second one-way valve part 33, the liquid outlet pipe body 32 is connected with the second end; the second one-way valve part 33 is arranged in the liquid outlet pipe body 32, and the second one-way valve part 33 communicates the liquid outlet pipe body 32 and the sampling pipe body 1 during drainage.

[0048] Specifically, the liquid outlet pipe body 32 can be threadedly connected with the sampling pipe body 1. For example, the liquid outlet pipe body 32 is provided with external threads adjacent to one end of the sampling pipe body 1, and the sampling pipe body 1 is provided with internal threads corresponding to the liquid outlet pipe body 32, so that the liquid outlet pipe body 32 is threadedly connected with the sampling pipe body 1 through the cooperation of the internal threads and the external threads. Of course, the internal threads can also be arranged on the liquid outlet pipe body 32, and the external threads can be arranged on the sampling pipe body 1, which is not limited herein.

[0049] In the embodiment, as shown in Figure 1 and Figure 3 , the second one-way valve part 33 comprises a third baffle plate 331, a second valve seat 332, a second elastic member 333 and a second valve plate 334, the third baffle plate 331 is arranged in the liquid outlet pipe body 32, the second valve seat 332 is arranged on one side of the third baffle plate 331 facing the sampling pipe body 1, and a second mounting cavity is formed between the second valve seat 332 and the third baffle plate 331, and an overflow port 3321 is formed on one side of the second valve seat 332 facing the sampling pipe body 1 to communicate the second mounting cavity and the sampling pipe body 1.

[0050] The third baffle plate 331 is provided with a one-way liquid discharge port 31 to communicate the side of the third baffle plate 331 away from the sampling tube body 1 with the second installation cavity; the second elastic member 333 is located in the second installation cavity, and one end of the second elastic member 333 is connected with the third baffle plate 331; the second valve plate 334 is connected with the other end of the second elastic member 333 to block the overflow port 3321 under the drive of the second elastic member 333.

[0051] Specifically, the one-way liquid discharge port 31 can include a plurality of one-way through holes arranged at intervals on the third baffle plate 331, so as to divide the one-way liquid discharge port 31 into a plurality of one-way through holes to discharge the water or gas in the upper part of the sampling tube body 1 through the one-way through holes.

[0052] For example, the second elastic member 333 is a spring, and the axial direction of the second elastic member 333 is parallel to the axial direction of the sampling tube body 1. Of course, the second elastic member 333 can also be provided in other forms, which are not limited herein.

[0053] It should be noted that when there is no water in the sampling tube body 1, the second valve plate 334 abuts against the second valve seat 332 and blocks the overflow port 3321 under the elastic force of the second elastic member 333; when water enters the sampling tube body 1, the second valve plate 334 is pressed to make the second valve plate 334 push the second elastic member 333 to contract, so that the overflow port 3321 communicates the second installation cavity with the sampling tube body 1; when the sampling tube body 1 is filled with water, the water in the upper part can enter the second installation cavity through the overflow port 3321, and the water in the second installation cavity can be discharged through the one-way liquid discharge port 31 on the third baffle plate 331.

[0054] In the embodiment, as shown in Figure 1 and Figure 3 , the second valve seat 332 includes a second side plate and a second cover plate, the second side plate is arranged around the second cover plate, and one end of the second side plate away from the second cover plate is connected with the third baffle plate 331, and the overflow port 3321 is arranged on the second cover plate. The second side plate and the second cover plate can be welded or integrally formed, which are not limited herein.

[0055] In the embodiment, as shown in Figure 1 and Figure 3 , the groundwater sampling device further includes a pulling member 4, and the pulling member 4 is arranged on the drainage assembly 3.

[0056] For example, the pulling member 4 is a rod body, and when sampling, a rope can be tied on the pulling member 4, so as to pull the groundwater sampling device by the rope. Of course, the pulling member 4 can also be provided in other forms which are convenient to pull, which are not limited herein.

[0057] It can be understood that by arranging the pulling member 4 on the drainage assembly 3, the underground water sampling device can be pulled through the pulling member 4 and the rope, and the sampling operation is more convenient.

[0058] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0059] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0060] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0061] In the present application, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0062] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the skilled person in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0063] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A groundwater sampling device, characterized by, The sampling tube body, the water inlet assembly and the water outlet assembly, the sampling tube body has a first end and a second end along its axial direction; the water inlet assembly is arranged at the first end, the water inlet assembly has a one-way inlet; the water outlet assembly is arranged at the second end, the water outlet assembly has a one-way outlet.

2. The groundwater sampling device of claim 1, wherein, The water inlet assembly comprises: a liquid inlet pipe body connected with the first end; a first one-way valve component arranged in the liquid inlet pipe body, the first one-way valve component connects the liquid inlet pipe body and the sampling tube body when liquid is inletted; a filter component arranged in the liquid inlet pipe body and located at the liquid inlet side of the one-way valve component.

3. The groundwater sampling device of claim 2, wherein, The first one-way valve component comprises: a first baffle arranged in the liquid inlet pipe body, the one-way inlet is arranged on the first baffle to connect the liquid inlet pipe body and the sampling tube body; a first valve seat arranged on the side of the first baffle facing the sampling tube body; a first elastic member having one end connected with the first valve seat; a first valve plate connected with the other end of the first elastic member and capable of blocking the one-way inlet under the drive of the first elastic member.

4. The groundwater sampling device of claim 3, wherein, The first valve seat comprises a first side plate and a first cover plate, the first side plate is circumferentially arranged around the first cover plate, and one end of the first side plate away from the first cover plate is connected with the first baffle, the first side plate is provided with a first outlet.

5. The groundwater sampling device of claim 3, wherein, The filter component comprises a second baffle arranged in the liquid inlet pipe body, the liquid inlet pipe body is provided with a side inlet and a second outlet arranged oppositely on the pipe wall, and the side inlet is located on the side of the second baffle facing the water outlet assembly, and the second outlet is located on the side of the second baffle away from the water outlet assembly.

6. The groundwater sampling device of claim 5, wherein, The second baffle is arranged radially inclined to the liquid inlet pipe body, and in the axial direction of the liquid inlet pipe body, the side inlet is located on the side of the second outlet away from the first baffle.

7. The groundwater sampling device of claim 5, wherein, The filter component further comprises a filter screen arranged at the side inlet.

8. The groundwater sampling device of claim 2, wherein, The liquid inlet pipe body is threadedly connected with the sampling tube body.

9. The groundwater sampling device of claim 1, wherein, The water outlet assembly comprises: a liquid outlet pipe body connected with the second end; a second one-way valve component arranged in the liquid outlet pipe body, the second one-way valve component connects the liquid outlet pipe body and the sampling tube body when liquid is outletted.

10. The groundwater sampling device of any one of claims 1-9, wherein, Further comprising a lifting member arranged in the water outlet assembly.

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