Underground water sampling device

Abstract

The utility model relates to the technical field of sampling devices, and discloses an underground water sampling device which comprises a lifting frame, a hollow shaft, a spline housing, a spline shaft, a cylinder, a spiral blade, a rotating shaft, a circular plate and a filter cartridge. During use, after the hollow shaft is driven by external force to rotate, the cylinder, the spiral blade and the circular plate can be driven to rotate synchronously. Then, the lifting frame is controlled to work, and the [-shaped plate can synchronously descend the cylinder, the spiral blade and the circular plate until the cylinder is inserted into an underground sampling position. After the spline shaft is driven by external force to slide, the rotating shaft can be driven to move, then the circular plate is driven to move, and the lower port of the cylinder is opened through the circular plate. And at the moment, the underground water can enter the cylinder after being filtered by the filter cartridge. Finally, the Beller pipe is put into the cylinder through the through hole, so that the underground water in the cylinder can be collected, and the sampling work of the underground water is completed. No additional drilling device is needed for drilling, and operation is easy and convenient.

Description

Technical Field

[0001] This application relates to the field of sampling device technology, such as a groundwater sampling device. Background Technology

[0002] A related technology (publication number: CN222013664U) discloses a shallow groundwater sampling device for preventing groundwater backflow and sediment accumulation, comprising a base plate. A sampling mechanism extending downwards from the top of the base plate includes a sampling box, a sealing block slidably connected inside the sampling box, and a filter plate fixedly connected to the inner wall of the sampling box. A limit rod is fixedly connected to the top of the base plate, and a connecting rope is sleeved on the outside of the limit rod, passing through the sealing block and fixedly connected to a stop block. A lifting mechanism is provided at the top of the base plate.

[0003] In implementing the above embodiments, at least the following problems were found in the related technology:

[0004] This shallow groundwater sampling device, designed to prevent groundwater backflow and sediment accumulation, allows groundwater to be drawn into the sampling box after the sealing block moves upward. Simultaneously, a stop block moves upward, sealing the lower end of the sampling box to prevent backflow. However, before sampling, other drilling equipment is required to drill holes in the ground, making the operation rather cumbersome.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides a groundwater sampling device to address the problems mentioned in the background section.

[0008] In some embodiments, the groundwater sampling device includes: a lifting frame, the lifting frame including a liftable U-shaped plate; a hollow shaft, rotatably inserted through the bottom wall of the U-shaped plate along the movement direction of the U-shaped plate; a spline sleeve installed inside the hollow shaft; a spline shaft slidably inserted through the spline sleeve; a cylinder connected to the outer wall of the hollow shaft and coaxially distributed with the hollow shaft, the cylinder including a plurality of through holes at its top; a helical blade connected to the outer wall of the cylinder; a rotating shaft connected to the bottom end of the spline shaft and located inside the cylinder; a circular plate installed at the bottom end of the rotating shaft and located outside the cylinder; and a filter cylinder installed on the top surface of the circular plate and fitted against the inner wall of the cylinder; wherein the hollow shaft can be controlled to rotate to drive the helical blade to rotate, and the spline shaft can be controlled to slide to drive the circular plate to open or close the lower port of the cylinder.

[0009] Optionally, the lifting frame further includes: a base, the base including a notch; a support plate, mounted on the top surface of the base; and a linear slide, mounted on the support plate along the movement direction of the C-shaped plate, the side wall of the C-shaped plate being connected to the moving end of the linear slide.

[0010] Optionally, the lifting frame further includes: a pad block installed on the support plate; a guide rail installed on the pad block along the movement direction of the C-shaped plate; and a slider installed on the guide rail and connected to the side wall of the C-shaped plate.

[0011] Optionally, the cylinder includes: a first cylinder body connected to the outer wall of the hollow shaft, with multiple through holes located on the side wall of the first cylinder body; a second cylinder body located below the first cylinder body, with the circular plate opening or closing the lower port of the second cylinder body; a third cylinder body evenly distributed between the first cylinder body and the second cylinder body along the movement direction of the C-shaped plate; and a first bolt threadedly connected to the uppermost third cylinder body and the first cylinder body, the lowermost third cylinder body and the second cylinder body, and two adjacent third cylinder bodies, respectively; wherein the helical blades are respectively installed on the outer walls of the first cylinder body, the second cylinder body, and the multiple third cylinder bodies.

[0012] Optionally, the rotating shaft includes: a first round rod connected to the bottom end of the splined shaft; a second round rod connected to the top surface of the circular plate; a third round rod evenly distributed between the first round rod and the second round rod along the movement direction of the C-shaped plate; flanges respectively installed at the bottom end of the first round rod, the top end of the second round rod, and both ends of each of the third round rods; second bolts respectively installed on two adjacent flanges; and nuts respectively threadedly connected to each of the second bolts.

[0013] Optionally, it further includes: an electric push rod, installed on the top surface of the C-shaped plate along the direction of movement of the C-shaped plate; a support, installed on the moving end of the electric push rod; and a first bearing, installed between the support and the top end of the spline shaft.

[0014] Optionally, it further includes: a motor mounted on the top wall of the C-shaped plate; a driving pulley mounted on the rotating end of the motor; a driven pulley mounted on the outer wall of the hollow shaft; and a belt fitted onto the driving pulley and the driven pulley.

[0015] Optionally, it further includes: a bearing housing, installed on the bottom wall of the U-shaped plate and sleeved on the hollow shaft; and a second bearing, installed between the bearing housing and the hollow shaft.

[0016] Optionally, it also includes a tapered drill bit mounted on the bottom surface of the circular plate.

[0017] The groundwater sampling device provided in this disclosure can achieve the following technical effects:

[0018] This disclosure provides a groundwater sampling device, including a lifting frame, a hollow shaft, a splined sleeve, a cylindrical cylinder, helical blades, a rotating shaft, a circular plate, and a filter cylinder. The lifting frame is located at the sampling opening and includes a liftable U-shaped plate. The hollow shaft is rotatably inserted through the bottom wall of the U-shaped plate along its movement direction, allowing it to rotate relative to the bottom wall. The splined sleeve is installed inside the hollow shaft to support and mount the slidable splined shaft. The splined shaft slidably passes through the splined sleeve and can slide relative to it. The cylindrical cylinder is connected to the outer wall of the hollow shaft and is coaxially distributed with it. The cylinder includes multiple through holes at its top for passing through a Bellerion tube to collect groundwater. The helical blades are connected to the outer wall of the cylinder for drilling. The rotating shaft is connected to the bottom end of the splined shaft and located inside the cylinder, moving under the drive of the splined shaft. The circular plate is mounted at the bottom of the rotating shaft and located outside the cylinder, moving under the drive of the rotating shaft. The filter cylinder is mounted on the top surface of the circular plate and fits against the inner wall of the cylinder, serving as a filter. The hollow shaft can be rotated in a controlled manner to drive the spiral blades, and the splined shaft can be slid in a controlled manner to open or close the lower port of the cylinder.

[0019] In operation, the hollow shaft rotates under external force, causing the cylinder to rotate, which in turn drives the helical blades. Simultaneously, the splined sleeve drives the splined shaft to rotate synchronously, which in turn drives the rotating shaft, ultimately causing the circular plate to rotate synchronously. Then, by controlling the lifting frame, the U-shaped plate, cylinder, helical blades, and circular plate descend synchronously until they are inserted into the underground sampling point. Afterward, the splined shaft slides under external force, driving the rotating shaft to move, which in turn moves the circular plate, opening the lower end of the cylinder. At this point, groundwater, filtered by the filter cartridge, enters the interior of the cylinder. Finally, the Belle tube is inserted into the cylinder through the through-hole to collect the groundwater, completing the groundwater sampling. No additional drilling equipment is required, making operation simple and convenient.

[0020] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0021] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are considered similar elements. The drawings do not constitute a limitation of scale, and wherein:

[0022] Figure 1 This is a cross-sectional structural schematic diagram of a groundwater sampling device provided in an embodiment of this disclosure;

[0023] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0024] Figure 3 yes Figure 1 Enlarged structural diagram at point B;

[0025] Figure 4 This is a schematic diagram of the main structure of a groundwater sampling device provided in an embodiment of this disclosure;

[0026] Figure 5 This is a top view of a groundwater sampling device provided in an embodiment of this disclosure.

[0027] Figure label:

[0028] 10: Lifting frame; 11: C-shaped plate; 12: Base; 13: Support plate; 14: Linear slide; 15: Pad block; 20: Hollow shaft; 30: Spline sleeve; 40: Spline shaft; 50: Cylinder; 51: First cylinder; 52: Second cylinder; 53: Third cylinder; 60: Helical blade; 70: Rotating shaft; 71: First round rod; 72: Second round rod; 73: Third round rod; 74: Flange; 80: Round plate; 90: Filter cartridge; 100: Electric push rod; 110: Support; 120: Motor; 130: Belt; 140: Bearing seat; 150: Tapered drill bit. Detailed Implementation

[0029] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0030] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0031] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0032] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0033] Unless otherwise stated, the term "multiple" means two or more.

[0034] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0035] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0037] Combination Figures 1 to 5 As shown, this embodiment of the present disclosure provides a groundwater sampling device, including a lifting frame 10, a hollow shaft 20, a spline sleeve 30, a spline shaft 40, a cylinder 50, a spiral blade 60, a rotating shaft 70, a circular plate 80, and a filter cylinder 90. The lifting frame 10 is located at the sampling opening and includes a liftable U-shaped plate 11. The hollow shaft 20 is rotatably inserted through the bottom wall of the U-shaped plate 11 along the movement direction of the U-shaped plate 11, and can rotate relative to the bottom wall of the U-shaped plate 11. The spline sleeve 30 is installed inside the hollow shaft 20 to support and install the slidable spline shaft 40. The spline shaft 40 is slidably inserted through the spline sleeve 30 and can slide relative to the spline sleeve 30. The cylinder 50 is connected to the outer wall of the hollow shaft 20 and is coaxially distributed with the hollow shaft 20. The cylinder 50 includes multiple through holes located at its top for passing through a Bellerion tube to collect groundwater. The spiral blade 60 is connected to the outer wall of the cylinder 50 and is used for drilling. The rotating shaft 70 is connected to the bottom end of the splined shaft 40 and is located inside the cylinder 50, moving under the drive of the splined shaft 40. The circular plate 80 is installed at the bottom end of the rotating shaft 70 and is located outside the cylinder 50, moving under the drive of the rotating shaft 70. The filter cylinder 90 is installed on the top surface of the circular plate 80 and fits against the inner wall of the cylinder 50, serving as a filter. The hollow shaft 20 can be rotated in a controlled manner to drive the spiral blade 60 to rotate, and the splined shaft 40 can be slid in a controlled manner to drive the circular plate 80 to open or close the lower port of the cylinder 50.

[0038] This embodiment of the invention provides a groundwater sampling device. A hollow shaft 20, driven by an external force, rotates, causing a cylinder 50 to rotate, which in turn drives a spiral blade 60 to rotate. Simultaneously, a splined sleeve 30 drives a splined shaft 40 to rotate synchronously, which in turn drives a rotating shaft 70 to rotate, ultimately causing a circular plate 80 to rotate synchronously. Then, by controlling the lifting frame 10, a U-shaped plate 11 descends synchronously with the cylinder 50, spiral blade 60, and circular plate 80 until it reaches the sampling point underground. Afterward, the splined shaft 40 slides under external force, driving the rotating shaft 70 to move, which in turn moves the circular plate 80, opening the lower port of the cylinder 50. Groundwater, filtered by a filter cartridge 90, then enters the cylinder 50. Finally, a Belle tube is inserted through a through-hole into the cylinder 50 to collect the groundwater, completing the groundwater sampling. No additional drilling equipment is required, making the operation simple and convenient.

[0039] Optionally, combined Figure 1 , Figure 4 and Figure 5 As shown, the lifting frame 10 also includes a base 12, a support plate 13, and a linear slide 14. The base 12 includes a notch for insertion into the ground via the cylinder 50, the circular plate 80, and the helical blade 60. The support plate 13 is mounted on the top surface of the base 12 to support the linear slide 14. The linear slide 14 is mounted on the support plate 13 along the direction of movement of the U-shaped plate 11, providing driving force to achieve linear movement. The sidewall of the U-shaped plate 11 is connected to the moving end of the linear slide 14.

[0040] In this embodiment of the disclosure, controlling the linear slide 14 to work can drive the shaped plate 11 to move up and down, and ultimately drive the cylinder 50, the spiral blade 60 and the circular plate 80 to move up and down synchronously.

[0041] Optionally, combined Figure 1 , Figure 4 and Figure 5 As shown, the lifting frame 10 also includes a pad 15, a guide rail, and a slider. The pad 15 is mounted on the support plate 13. The guide rail is mounted on the pad 15 along the movement direction of the C-shaped plate 11. The slider is mounted on the guide rail and is connected to the side wall of the C-shaped plate 11.

[0042] In this embodiment, the pad 15 serves to support and elevate the guide rail and slider to adjust their positions. The guide rail and slider serve to guide and support, improving the stability of the C-shaped plate 11 during movement and reducing the force on the moving end of the linear slide 14.

[0043] Optionally, combined Figure 1 , Figure 3 and Figure 4As shown, the cylinder 50 includes a first cylinder 51, a second cylinder 52, a third cylinder 53, and a first bolt. The first cylinder 51 is connected to the outer wall of the hollow shaft 20, and multiple through holes are located on the side wall of the first cylinder 51. The second cylinder 52 is located below the first cylinder 51, and the circular plate 80 opens or closes the lower port of the second cylinder 52. The third cylinder 53 is evenly distributed between the first cylinder 51 and the second cylinder 52 along the movement direction of the U-shaped plate 11. The first bolt is threadedly connected to the uppermost third cylinder 53 and the first cylinder 51, the lowermost third cylinder 53 and the second cylinder 52, and two adjacent third cylinders 53, respectively, to achieve detachable installation between the uppermost third cylinder 53 and the first cylinder 51, the lowermost third cylinder 53 and the second cylinder 52, and two adjacent third cylinders 53. The spiral blades 60 are respectively installed on the outer walls of the first cylinder 51, the second cylinder 52, and the multiple third cylinders 53.

[0044] In this embodiment, the uppermost third cylinder 53 is detachably connected to the first cylinder 51, the lowermost third cylinder 53 is detachably connected to the second cylinder 52, and adjacent third cylinders 53 are detachably connected by a first bolt. Therefore, after the second cylinder 52 and the connected third cylinder 53 are drilled into the ground, a new third cylinder 53 can be added by removing or installing the first bolt, thereby increasing the depth of drilling into the ground and allowing for water sampling from deeper underground locations.

[0045] Optionally, combined Figure 1 and Figure 3 As shown, the rotating shaft 70 includes a first round rod 71, a second round rod 72, a third round rod 73, a flange 74, second bolts, and nuts. The first round rod 71 is connected to the bottom end of the splined shaft 40. The second round rod 72 is connected to the top surface of the circular plate 80. The third round rods 73 are evenly distributed between the first round rods 71 ​​and the second round rods 72 along the direction of movement of the C-shaped plate 11. The flanges 74 are respectively installed at the bottom end of the first round rod 71, the top end of the second round rod 72, and both ends of each third round rod 73. The second bolts are respectively installed on two adjacent flanges 74. Nuts are threaded onto each second bolt.

[0046] In this embodiment, a second bolt and nut are used as connecting members, allowing for detachable installation between the first round rod 71 and the uppermost third round rod 73, the second round rod 72 and the lowermost third round rod 73, and two adjacent third round rods 73. Therefore, when adding the third cylinder 53, a new third round rod 73 can be added by installing or removing the second bolt and nut, thereby extending the overall length of the rotating shaft 70 to match the overall length of the cylinder 50.

[0047] Optionally, combined Figure 1 and Figure 2As shown, it also includes an electric actuator 100, a support 110, and a first bearing. The electric actuator 100 is mounted on the top surface of the C-shaped plate 11 along the direction of movement of the C-shaped plate 11, and is used to provide driving force to achieve linear movement. The support 110 is mounted on the moving end of the electric actuator 100 and moves under the drive of the electric actuator 100. The first bearing is mounted between the support 110 and the top end of the splined shaft 40, so that the support 110 and the splined shaft 40 can rotate relative to each other, so that the support 110 rotates with the rotation of the splined shaft 40.

[0048] In this embodiment, controlling the electric push rod 100 to operate will move the support 110. Through the first bearing, the spline shaft 40 can be moved, ultimately causing the circular plate 80 to open or close the lower port of the cylinder 50.

[0049] Optionally, combined Figure 1 and Figure 4 As shown, it also includes a motor 120, a drive pulley, a driven pulley, and a belt 130. The motor 120 is mounted on the top wall of the U-shaped plate 11 to provide driving force for rotary motion. The drive pulley is mounted on the rotating end of the motor 120 and rotates under the drive of the motor 120. The driven pulley is mounted on the outer wall of the hollow shaft 20 to drive the hollow shaft 20 to rotate. The belt 130 is fitted onto the drive pulley and the driven pulley to transmit driving force.

[0050] In this embodiment, controlling the motor 120 to operate drives the drive pulley to rotate. The belt 130 then drives the driven pulley to rotate, which in turn drives the hollow shaft 20 to rotate. Furthermore, the design of having a smaller diameter for the drive pulley than the driven pulley reduces the rotational speed and increases the output torque.

[0051] Optionally, combined Figure 1 and Figure 2 As shown, it also includes a bearing housing 140 and a second bearing. The bearing housing 140 is mounted on the bottom wall of the U-shaped plate 11 and sleeved on the hollow shaft 20. The second bearing is installed between the bearing housing 140 and the hollow shaft 20.

[0052] In this embodiment, the bearing housing 140 is installed on the bottom wall of the U-shaped plate 11 to support and limit the installation of the second bearing. The second bearing is used to support and install the rotatable hollow shaft 20, reduce the frictional force on the hollow shaft 20, and improve the rotational accuracy of the hollow shaft 20.

[0053] Optionally, combined Figures 1 to 5 As shown, it also includes a tapered drill bit 150. The tapered drill bit 150 is mounted on the bottom surface of the circular plate 80.

[0054] In this embodiment of the disclosure, a conical drill bit 150 is also included, which is mounted on the bottom surface of the circular plate 80. The conical drill bit 150 is used to break the soil to facilitate drilling operations.

[0055] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A groundwater sampling device, characterized in that, include: A lifting frame, the lifting frame including a liftable C-shaped plate; A hollow shaft is rotatably inserted through the bottom wall of the C-shaped plate along the direction of movement of the C-shaped plate; Spline sleeve, installed inside the hollow shaft; The spline shaft is slidably inserted into the spline sleeve; A cylinder is connected to the outer wall of the hollow shaft and is coaxially distributed with the hollow shaft. The cylinder includes a plurality of through holes located at its top. Helical blades are connected to the outer wall of the cylinder; A rotating shaft is connected to the bottom end of the splined shaft and is located inside the cylinder; A circular plate is installed at the bottom end of the rotating shaft and is located outside the cylinder; A filter cartridge is installed on the top surface of the circular plate and fits against the inner wall of the cylinder; The hollow shaft can be rotated in a controlled manner to drive the helical blades to rotate, and the spline shaft can be slid in a controlled manner to drive the circular plate to open or close the lower port of the cylinder.

2. The groundwater sampling device according to claim 1, characterized in that, The lifting frame also includes: The base includes a notch; A support plate is installed on the top surface of the base; A linear slide is mounted on the support plate along the movement direction of the C-shaped plate, and the side wall of the C-shaped plate is connected to the moving end of the linear slide.

3. A groundwater sampling device according to claim 2, characterized in that, The lifting frame also includes: Pad blocks are installed on the support plate; A guide rail is mounted on the pad along the direction of movement of the C-shaped plate; The slider is mounted on the guide rail and connected to the side wall of the C-shaped plate.

4. A groundwater sampling device according to claim 1, characterized in that, The cylinder includes: The first cylindrical body is connected to the outer wall of the hollow shaft, and the plurality of through holes are all located on the side wall of the first cylindrical body; The second cylinder is located below the first cylinder, and the circular plate opens or closes the lower port of the second cylinder. The third cylinder is evenly distributed between the first cylinder and the second cylinder along the direction of movement of the C-shaped plate; The first bolt is threadedly connected to the uppermost third cylinder and the first cylinder, the lowermost third cylinder and the second cylinder, and between two adjacent third cylinders; The spiral blades are respectively installed on the outer walls of the first cylinder, the second cylinder, and the plurality of third cylinders.

5. A groundwater sampling device according to claim 1, characterized in that, The rotating shaft includes: The first round rod is connected to the bottom end of the splined shaft; The second round rod is connected to the top surface of the round plate; The third round rod is evenly distributed between the first round rod and the second round rod along the direction of movement of the C-shaped plate; Flanges are respectively installed at the bottom end of the first round rod, the top end of the second round rod, and both ends of each of the third round rods; The second bolt is installed on each of the two adjacent flanges; Nuts are threaded onto each of the second bolts.

6. A groundwater sampling device according to any one of claims 1 to 5, characterized in that, Also includes: An electric push rod is installed on the top surface of the C-shaped plate along the direction of movement of the C-shaped plate; A support is installed on the moving end of the electric push rod; The first bearing is installed between the support and the top of the splined shaft.

7. A groundwater sampling device according to any one of claims 1 to 5, characterized in that, Also includes: The motor is mounted on the top wall of the C-shaped plate; An active pulley is installed on the rotating end of the motor; The driven pulley is installed on the outer wall of the hollow shaft; A belt is fitted onto the driving pulley and the driven pulley.

8. A groundwater sampling device according to any one of claims 1 to 5, characterized in that, Also includes: The bearing housing is installed on the bottom wall of the U-shaped plate and sleeved on the hollow shaft; The second bearing is installed between the bearing housing and the hollow shaft.

9. A groundwater sampling device according to any one of claims 1 to 5, characterized in that, Also includes: A tapered drill bit is mounted on the bottom surface of the circular plate.

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