A groundwater sampling device

Abstract

The utility model provides a kind of underground water sampling device, belong to sampling equipment technical field, solve the underground water sampling cumbersome difficulty, time-consuming and labor-consuming, the water sample taken suffers pollution problem.Underground water sampling device includes: the drill rod with top opening and bottom opening;Fixedly connected on the outer surface of the drill rod multiple blades;Screw is connected at the bottom opening of the drill rod;Iron screen is installed on the inner surface of the drill rod.The technical scheme of the utility model utilizes sand soil liquefaction to take water, can directly obtain unpolluted underground water water sample in sand soil stratum, it is convenient and fast, simple and practical in design, reduces underground water sampling difficulty.

Description

Technical Field

[0001] This utility model relates to the field of sampling equipment technology, and in particular to a groundwater sampling device. Background Technology

[0002] During geotechnical engineering investigations, groundwater samples need to be taken for soluble salt analysis, but groundwater sampling is difficult. Currently, there are three main sampling methods: 1) Taking saturated sand from the borehole and placing it in a container to precipitate the water sample; this method is cumbersome, time-consuming, and labor-intensive. 2) Placing a container inside the borehole to collect the water; this method is simple to operate, but when drilling into sandy soil strata and reaching the groundwater level, the borehole is prone to collapse, causing the method to frequently fail. 3) Using a mud-wall protection process during drilling to form a mud cake on the borehole wall to reinforce it and prevent collapse, then placing a container to collect the water; however, the injected mud mixes with the groundwater, causing the collected water sample to be contaminated, thus distorting the water sample analysis results. Utility Model Content

[0003] This invention provides a groundwater sampling device that solves the problems of cumbersome, time-consuming, and labor-intensive groundwater sampling, as well as the contamination of the extracted water samples.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] This utility model provides a groundwater sampling device, comprising:

[0006] Drill pipe with a top opening and a bottom opening;

[0007] Multiple blades are fixedly connected to the outer surface of the drill pipe;

[0008] A screw threaded into the opening at the bottom of the drill pipe;

[0009] Iron wire installed on the inner surface of the drill rod.

[0010] Optionally, the drill pipe includes:

[0011] Rods with uniform inner diameter;

[0012] A frustum-shaped rod head with a top inner diameter larger than a bottom inner diameter;

[0013] The inner diameter of the rod body is the same as the inner diameter of the top of the rod head.

[0014] Optionally, the rod body and the rod head are integrally formed.

[0015] Optionally, the rod body has water-permeable holes on its side wall.

[0016] Optionally, the plurality of blades are equidistant along the axial direction of the rod.

[0017] Optionally, the screw tail end is threaded to the bottom inner surface of the rod head, and the outer diameter of the screw tail end is consistent with the inner diameter of the bottom of the rod head, and the two are sealed together.

[0018] Optionally, the wire mesh is connected to the inner surface of the rod by screws or welded.

[0019] Optionally, all of the multiple blades have a helical curved surface structure, and any two points on the multiple blades have a height difference.

[0020] Optionally, the drill pipe is made of steel.

[0021] Optionally, the top of the drill rod is mounted on the drilling rig via a snap-fit ​​connection or a threaded connection.

[0022] The above-described solution of this utility model has at least the following beneficial effects:

[0023] The groundwater sampling device of this utility model includes: a drill rod with a top opening and a bottom opening; multiple blades fixedly connected to the outer surface of the drill rod; a screw threadedly connected to the bottom opening of the drill rod; and wire mesh installed on the inner surface of the drill rod. This utility model utilizes sand liquefaction for water extraction, enabling the direct acquisition of uncontaminated groundwater samples from sandy soil strata. It is convenient and quick to operate, simple and practical in design, and reduces the difficulty of groundwater sampling. Attached Figure Description

[0024] Figure 1 This is a front view of the groundwater sampling device according to an embodiment of the present invention;

[0025] Figure 2 This is a right view of the groundwater sampling device according to an embodiment of the present invention;

[0026] Figure 3 This is a cross-sectional view of the rod structure of the groundwater sampling device according to an embodiment of this utility model;

[0027] Figure 4 This is an overall structural diagram of the groundwater sampling device according to an embodiment of the present invention.

[0028] The components include: 1. Drill rod; 2. Multiple blades; 3. Screw; 4. Wire mesh; 5. Rod body; 6. Rod head; 7. Water-permeable hole. Detailed Implementation

[0029] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0030] like Figure 1 and Figure 3 As shown, an embodiment of this utility model provides a groundwater sampling device, comprising:

[0031] Drill rod 1 with a top opening and a bottom opening;

[0032] Multiple blades 2 are fixedly connected to the outer surface of the drill rod 1;

[0033] The screw 3 is threaded into the bottom opening of the drill rod 1;

[0034] Iron wire 4 is installed on the inner surface of the drill rod 1;

[0035] The drill rod 1 is made of steel, and the top of the drill rod 1 is installed on the drilling rig by a snap-fit ​​connection or a threaded connection.

[0036] In this embodiment, the groundwater sampling device is ingeniously designed, with each component working together to efficiently and accurately complete the groundwater sampling task, providing reliable sample data for fields such as geological exploration and environmental monitoring.

[0037] The drill rod 1 has a top opening and a bottom opening. The top opening is used for installation on the drilling rig via a snap-fit ​​connection or a threaded connection. The snap-fit ​​connection offers the advantages of convenient installation and disassembly, allowing for quick connection or separation of the drill rod 1 from the drilling rig, improving work efficiency. The threaded connection features a strong connection and good sealing performance, ensuring the stability of the connection between the drill rod 1 and the drilling rig, preventing loosening or detachment during drilling, and ensuring the safety and reliability of the sampling process. The bottom opening is used to connect the screw 3, and the internal space formed by the screw 3 and the drill rod 1 stores the groundwater sample. The drill rod 1 is made of steel, which has high strength, high toughness, and good corrosion resistance. During groundwater sampling, the drill rod 1 needs to penetrate deep underground, encountering various complex soil and rock environments. The high strength of the steel ensures that the drill rod 1 will not easily deform or be damaged during downward drilling, ensuring the continuity and stability of the sampling work. At the same time, the corrosion resistance of the steel prevents underground substances from corroding the drill rod 1 during long-term use, thereby extending the service life of the drill rod 1 and reducing equipment maintenance costs.

[0038] The multiple blades 2 are fixedly connected to the outer surface of the drill rod 1. Their number and distribution are adjusted according to actual sampling needs and drilling environment. By repeatedly pulling up and pressing down the sampling device, the multiple blades 2 vibrate, squeeze, and shear the surrounding soil, liquefying the surrounding sand and causing a sharp increase in pore water pressure. The particles are suspended in the water, thereby causing the sand and soil to liquefy and release pore water, which seeps into the sampling device. The multiple blades 2 are evenly distributed on the outer surface of the drill rod 1, which ensures that the drill rod 1 is subjected to uniform force during downward drilling, avoiding deviation or jamming, and ensuring that the drill rod 1 can penetrate deep underground along the predetermined trajectory.

[0039] The screw 3 is threaded onto the bottom opening of the drill rod 1. During sampling, the screw 3 seals the bottom opening of the drill rod 1, preventing groundwater from entering the drill rod 1 before reaching the sampling position, thus ensuring sampling accuracy. When sampling is complete and the groundwater sample needs to be removed, the screw 3 can be rotated to remove it from the bottom opening of the drill rod 1, allowing the groundwater sample to be poured out. The screw 3 ensures the controllability and accuracy of the sampling process, preventing sample mixing, contamination, and other problems that could affect subsequent analysis and research results.

[0040] The wire mesh 4 is installed on the inner surface of the drill rod 1, covering the inner wall of the drill rod 1 to form a filter layer. This layer provides preliminary filtration of the groundwater entering the drill rod 1. The main function of the wire mesh 4 is to filter impurities in the groundwater, such as silt and stones. During groundwater sampling, impurities not only affect sample quality but can also damage subsequent analytical equipment. The presence of the wire mesh 4 effectively prevents impurities from entering the drill rod 1, ensuring the relative purity of the obtained groundwater sample and improving sample reliability and analytical accuracy. Simultaneously, the wire mesh 4 also acts as a buffer, reducing the impact force when groundwater enters the drill rod 1 and protecting the internal components of the drill rod 1 from damage.

[0041] like Figure 1 As shown, in an optional embodiment of the present invention, the drill pipe 1 includes:

[0042] 5. Rods with consistent inner diameter;

[0043] A frustum-shaped rod head 6 with a top inner diameter larger than a bottom inner diameter;

[0044] The inner diameter of the rod body 5 is the same as the inner diameter of the top of the rod head 6, and the rod body 5 and the rod head 6 are integrally formed.

[0045] In this embodiment, the inner diameter of the rod 5 remains consistent throughout its length, providing a stable channel for the flow of groundwater within the drill rod 1. During sampling, after entering the drill rod 1, the groundwater flows smoothly downwards within the uniformly sized rod 5, avoiding problems such as uneven flow resistance or sudden changes in flow velocity caused by variations in the inner diameter. This ensures the stability and continuity of the sampling process and also facilitates cleaning and maintenance of the drill rod 1. After sampling is completed, the interior of the rod 5 can be thoroughly cleaned to remove residual impurities or samples, ensuring the accuracy of subsequent sampling.

[0046] The rod head 6 is truncated cone-shaped, with its top inner diameter being larger than its bottom inner diameter. The larger top inner diameter provides a more spacious inlet space for groundwater, which is conducive to the rapid and smooth downward convergence of groundwater. When the drill rod 1 penetrates deep into the ground, the groundwater will flow into the drill rod 1 under the action of the surrounding soil pressure. The truncated cone-shaped rod head 6 can expand the water intake area, improve the water intake efficiency, and ensure that a sufficient amount of groundwater sample can be obtained in a short time.

[0047] The rod body 5 and the rod head 6 are manufactured using an integral molding method, ensuring the connection strength between the rod body 5 and the rod head 6. During the process of the drill rod 1 penetrating underground to collect samples, it will be subjected to various external forces from the soil and rocks. The integral molding design allows the rod body 5 and the rod head 6 to become a whole, effectively resisting external pressure and preventing loosening or breakage at the connection, thus ensuring the safety and reliability of the sampling work. At the same time, the integral molding eliminates connection gaps, reducing the possibility of groundwater leakage or impurities entering at the connection, further improving the quality and accuracy of the sample. The integral molding design also simplifies the manufacturing process, reduces production costs, and improves production efficiency.

[0048] like Figure 1 As shown, in an optional embodiment of the present invention, the rod body 5 has a water-permeable hole 7 on its side wall.

[0049] In this embodiment, the permeable hole 7 is provided on the side wall of the rod body 5. The permeable hole 7 is located on the side wall of the rod body 5, providing a channel for groundwater to enter the drill rod 1, thereby allowing groundwater to enter the drill rod 1. The shape of the permeable hole 7 can be designed according to actual needs, and can be designed as circular, elliptical, etc. Circular permeable holes have the advantages of easy processing and uniform stress distribution. When subjected to external forces, they are less likely to experience stress concentration, which could lead to deformation or damage of the hole. Elliptical permeable holes 7 can increase the water inlet area to a certain extent, and can also adapt to groundwater flow in different directions.

[0050] like Figure 1 and Figure 4As shown, in an optional embodiment of the present invention, the plurality of blades 2 are equidistantly arranged along the axial direction of the rod body 5, the plurality of blades 2 are all helical curved surface structures, and any two points on the plurality of blades 2 have a height difference.

[0051] In this embodiment, groundwater sampling is typically conducted in complex geological environments. The drill rod 1 needs to penetrate deep underground, overcoming resistance from soil and rock. The blades 2 play a crucial role in improving drilling efficiency, ensuring sampling accuracy, and maintaining the overall stability of the device. The multiple blades 2 are equidistantly arranged along the axial direction of the rod body 5. This equidistant arrangement provides uniform drilling force to the drill rod 1. During drilling, the drill rod 1 experiences reaction forces from the soil and rock. If the blades 2 are unevenly distributed, it can lead to uneven stress on the drill rod 1, causing problems such as skewing, vibration, or even jamming. The equidistant arrangement of the blades 2 ensures a relatively balanced reaction force on the drill rod 1 in all directions, reducing swaying and deviation from the predetermined trajectory, thereby improving drilling stability and accuracy. Setting the multiple blades 2 as a helical curved surface structure can aid in soil liquefaction, facilitating the drill rod 1 to penetrate deep underground to the designated sampling location as designed.

[0052] like Figure 2 As shown, in an optional embodiment of the present invention, the screw 3 is threaded to the bottom inner surface of the rod head 6, and the outer diameter of the screw 3 is consistent with the inner diameter of the bottom of the rod head 6, and the two are sealed together.

[0053] In this embodiment, a sealing structure is formed between the screw 3 and the rod head 6. The threaded connection between the two ensures the stability of the device and guarantees its airtightness during the sampling process, thereby ensuring the quality of the sample and the normal operation of the sampling work. The matching size of the screw 3 and the rod head 6 allows them to fit tightly together during connection, reducing gaps at the connection point and preventing groundwater or other impurities from seeping in during sampling, which could affect the purity and quality of the sample. It also reduces the risk of stress concentration and component damage caused by loosening at the connection point.

[0054] like Figure 3 As shown, in an optional embodiment of the present invention, the iron wire 4 is connected to or welded to the inner surface of the rod body 5 by screws.

[0055] In this embodiment, during groundwater sampling, the drill rod 1 encounters various complex geological environments as it penetrates the ground, containing a large amount of impurities such as mud, sand, and rocks. If these impurities enter the drill rod 1 along with the groundwater, they will not only contaminate the sample and affect the accuracy of subsequent analyses of groundwater quality and composition, but also cause blockages in the internal pipes of the drill rod 1, hindering the normal progress of sampling. Therefore, installing the wire mesh 4 on the inner surface of the rod 5 can effectively filter impurities in the groundwater, ensuring the purity of the sample and the smooth progress of the sampling work.

[0056] The above embodiments of this utility model are simple to manufacture and convenient to use, reducing the time and effort required to obtain water samples, simplifying the water collection process, preventing the water collection method from failing due to sand and soil collapse, and also avoiding water sample contamination, ensuring that the water sample can truly reflect groundwater information.

[0057] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A groundwater sampling device, characterized in that, include: A drill pipe (1) with a top opening and a bottom opening; Multiple blades (2) are fixedly connected to the outer surface of the drill rod (1); A screw (3) is threaded into the bottom opening of the drill rod (1); Iron wire mesh (4) installed on the inner surface of the drill rod (1).

2. The groundwater sampling device according to claim 1, characterized in that, The drill pipe (1) includes: Rods with uniform inner diameter (5); A frustum-shaped rod head with a top inner diameter larger than a bottom inner diameter (6); The inner diameter of the rod body (5) is the same as the inner diameter of the top of the rod head (6).

3. The groundwater sampling device according to claim 2, characterized in that, The rod body (5) and the rod head (6) are integrally formed.

4. The groundwater sampling device according to claim 2, characterized in that, The rod (5) has water-permeable holes (7) on its side wall.

5. The groundwater sampling device according to claim 2, characterized in that, The plurality of blades (2) are equidistantly arranged along the axial direction of the rod (5).

6. The groundwater sampling device according to claim 2, characterized in that, The screw (3) is threaded to the bottom inner surface of the rod head (6), and the outer diameter of the screw (3) is consistent with the inner diameter of the bottom of the rod head (6), and the two are sealed together.

7. The groundwater sampling device according to claim 2, characterized in that, The iron wire (4) is connected to or welded to the inner surface of the rod (5) by screws.

8. The groundwater sampling device according to claim 1, characterized in that, The plurality of blades (2) are all spiral curved surface structures, and any two points on the plurality of blades (2) have a height difference.

9. The groundwater sampling device according to claim 1, characterized in that, The drill rod (1) is made of steel.

10. The groundwater sampling device according to claim 1, characterized in that, The top of the drill rod (1) is installed on the drilling rig by a snap-fit ​​connection or a threaded connection.

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