A groundwater sampling device for hydrogeology
By using a balance mechanism and a trigger mechanism in the float fixed depth sampler, the problem of inaccurate sampler positioning and depth control failure caused by the tilt of the draw rope is solved, and the accuracy and stability of groundwater sampling are achieved.
Patent Information
- Application Number
- CN202510054073.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-04-08
AI Technical Summary
Existing float fixed depth samplers can easily cause the draw rope to tilt under the action of water flow, which will affect the positioning accuracy and depth control of the sample, resulting in inaccurate sample mixing and sampling.
A groundwater sampling equipment for hydrogeology was designed, and a balance mechanism was used to provide uniform buoyancy through four floats to ensure the stable position of the equipment in the water body, and automatic water pumping was achieved through the trigger mechanism to ensure the accuracy of the sampling process.
It effectively avoids equipment inclination and positional offset caused by buoyancy imbalance, ensures the stability and positioning accuracy of the sampler, and improves the accuracy and representativeness of groundwater sampling.
Smart Images
Figure CN119779766A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of sampling and detection, in particular to a groundwater sampling device for hydrogeology. Background Art
[0002] The float fixed depth sampler is a device that uses the buoyancy principle to achieve fixed depth sampling. Its core components include a float, a sampling container, and a depth limiting mechanism. By adjusting the buoyancy of the float and the setting position of the sampling container, the sampler can be kept stable at a specific depth to collect groundwater samples. It is mainly suitable for collecting stable fixed depth water samples in shallow groundwater or in environments with large well diameters.
[0003] During the lowering of the sampler, the rope is prone to swing or deflection due to the instantaneous change of water flow. In theory, the rope should remain vertical to accurately reflect the actual position and depth of the sampler. However, once the rope is tilted, there will be a deviation between its length and the actual vertical depth, resulting in unreliable depth readings. This deviation directly affects the positioning accuracy of the sampler, which may cause the float sampler to deviate from the predetermined position and fail to accurately reach the target depth. For groundwater systems with significant stratification, the deviation caused by the rope tilt will cause the sampling layer to mix or collect samples from non-target water layers, reducing the representativeness and accuracy of the sampling. In addition, the rope tilt changes the force direction of the sampler. Since the tension of the rope is no longer completely vertical, the sampler may be subjected to an asymmetric torque, causing the float to rotate or shake. This dynamic instability further exacerbates the uncertainty of the sampler position and leads to failure of depth control. From a scientific point of view, the swing and tilt of the rope are the result of the horizontal force applied to it by the water flow. According to mechanical analysis, an increase in the tilt angle will reduce the vertical component of the rope tension and increase the horizontal component, which not only affects the correspondence between the length and depth of the rope, but also may cause the sampler to deviate. The principles of fluid mechanics show that the product of the water velocity and the surface area of the float sampler determines the magnitude of the force. Once this force deviates from the symmetrical distribution, the float is prone to rotation or displacement. The eddy effect formed during the rotation will further disrupt the stability of the sampler, and ultimately have a negative impact on the sampling results. In summary, the inclination of the rope and the series of problems it causes are not only reasonable, but also have a significant impact on groundwater sampling, especially in deep wells and systems with significant stratification. Summary of the invention
[0004] 1. Technical issues to be resolved
[0005] In view of the shortcomings of the prior art, the present invention provides a groundwater sampling device for hydrogeology, which solves the problem that the pull rope becomes tilted under the action of water flow, resulting in inaccurate positioning of the sampler, failure of depth control and sample mixing, thereby significantly affecting the accuracy and representativeness of groundwater sampling.
[0006] (II) Technical solution
[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a groundwater sampling device for hydrogeology, comprising a body, which is used as the main structural support and load-bearing component of the device; a liquid inlet mechanism, which is arranged at the bottom of the body, and the body is used to provide stable water input; a balancing mechanism, which is arranged at the top of the body, and the balancing mechanism is used to balance the body in the water; a connecting rope, which is arranged at the top of the balancing mechanism, and is used to facilitate the lowering of the body, ensuring that the operation process of the equipment in the water is more stable and convenient, and at the same time providing support for the recovery of the body; a trigger mechanism, which is arranged on the body, and is used to trigger the sampling of water after the balancing mechanism keeps the body vertical.
[0008] Preferably, the liquid inlet mechanism includes a liquid outlet, the liquid outlet is fixedly connected to the bottom of the body, a hollow cylindrical member is fixedly connected to the inner wall of the liquid outlet, a top fixing plate is fixedly connected to the inner wall of the liquid outlet, one end of a spring 1 is fixedly connected to the outer wall of the top fixing plate, the other end of the spring 1 is fixedly connected to a limiting disk, the outer wall of the limiting disk is fixedly connected to a positioning rod, the inner wall of the hollow cylindrical member is rotatably connected to an impeller, the outer wall of the impeller is fixedly connected to one end of a transmission rod, the other end of the transmission rod is fixedly connected to a cleaning member, and the outer wall of the liquid outlet is fixedly connected to a filter member.
[0009] Preferably, a hollow through groove is provided on the inner wall of the hollow cylindrical member, and the outer wall of the positioning rod is slidably connected to the inner wall of the top fixing plate.
[0010] Preferably, a through hole is provided on the filter element, and the outer wall of the cleaning element contacts the filter element.
[0011] Preferably, the balancing mechanism includes a top lightweight disc block, one end of a telescopic tube 1 is fixedly connected to the inner wall of the top lightweight disc block, the other end of the telescopic tube 1 is fixedly connected to the top disc connecting block, the outer wall of the top disc connecting block is fixedly connected to a connecting rod, the side of the connecting rod away from the top disc connecting block is fixedly connected to a float, the bottom of the top lightweight disc block is fixedly connected to a bottom connecting sleeve, the inner wall piston of the bottom connecting sleeve is connected to the bottom connecting tube, the thread of the bottom connecting sleeve is connected to a threaded rod, the inner wall of the telescopic tube 1 is fixedly connected to a spring 2, a top air outlet is opened at the top of the telescopic tube 1, one end of a spring 3 is fixedly connected to the inner wall of the body, the other end of the spring 3 is fixedly connected to a piston member, and a one-way valve is provided on the piston member.
[0012] Preferably, the outer wall of the top disc connecting block is slidably connected to the inner wall of the top light disc block, and the outer wall of the connecting rod is piston-connected to the inner wall of the top light disc block.
[0013] Preferably, the outer wall of the piston member is fixedly connected to the outer wall of the bottom connecting tube, the outer wall of the piston member is piston-connected to the inner wall of the body, and the top of the top lightweight disc block is fixedly connected with a connecting rope.
[0014] Preferably, the trigger mechanism includes a first through groove, which is arranged on the inner wall of the top lightweight disc block, a second through groove is opened on the inner wall of the bottom connecting tube, a square limiting groove is arranged on the top of the body, a through-hole square fixing block is fixedly connected to the inner wall of the second through groove, one end of the telescopic tube two is fixedly connected to the outer wall of the through-hole square fixing block, the other end of the telescopic tube two is fixedly connected to a trapezoidal block, and a spring four is fixedly connected to the inner wall of the telescopic tube two.
[0015] (III) Beneficial effects
[0016] Compared with the prior art, the present invention provides a groundwater sampling device for hydrogeology, which has the following beneficial effects:
[0017] 1. The groundwater sampling equipment for hydrogeology is set up with a balancing mechanism to place the body on the toxic water body that needs to be tested. At this time, four floats provide buoyancy in four directions. The buoyancy of the four floats is transmitted to the top lightweight disc block through the connecting rod, the top disc connecting block, the telescopic tube 1, and the spring 2 on the inner wall of the telescopic tube 1, so that the top lightweight disc block is flush with the water surface. The principle of this design is that through the balance of buoyancy, there is uniform buoyancy in four directions on the top of the top lightweight disc block, so that the body is in a stable horizontal position. The buoyancy is a vertical upward force. When the four floats are evenly distributed and provide the same buoyancy, it can ensure that the top lightweight disc block is flush with the water surface. The uniform distribution of buoyancy eliminates the risk of body tilt or displacement caused by unbalanced buoyancy, and avoids uneven buoyancy causing equipment tilt or position displacement. The floats transmit force to the top lightweight disc block through interaction, thereby effectively controlling the vertical position of the equipment and ensuring the accuracy of the sampling process and the stability of the equipment in the water body.
[0018] 2. The groundwater sampling equipment for hydrogeology is arranged by using a trigger mechanism. When the floats in four directions are all located at the bottom of the water, the buoyancy provided by the four floats drives the connecting rod and the top disc connecting block to move upward, so that the telescopic tube 1 and the spring 2 in the telescopic tube 1 are compressed. Since the telescopic tube 1 is compressed, the amount of air in the first through slot remains unchanged. At this time, negative pressure is formed in the first through slot, so that negative pressure is formed in the second through slot. The negative pressure of the second through slot is transmitted to the telescopic tube 2 through the through hole of the through hole square fixing block, so that the telescopic tube 2 is compressed. The telescopic tube 2 drives the trapezoidal block to no longer engage with the inner wall of the square limit groove. The bottom connecting tube can now move upward relative to the square limit groove and the machine body, so that the tension of the spring 3 is released, driving the piston and the bottom connecting tube to move upward, so that negative pressure is formed in the machine body and water is pumped. Only when the four floats in the four directions are all at the bottom of the water can the buoyancy provided be sufficient to retract the trapezoidal block, thus achieving automatic water pumping. This pumping process can only ensure that the trapezoidal block retracts and triggers the negative pressure system when the four floats are all at the bottom of the water. Therefore, the system ensures that the pumping mechanism can only be started when the floats are completely sunk, ensuring accurate water extraction.
[0019] 3. The groundwater sampling equipment for hydrogeology is arranged by using a liquid inlet mechanism. When the piston moves upward, negative pressure is formed at the bottom of the piston, so that the limit plate moves upward under the action of the negative pressure, so that the inner wall of the hollow cylindrical part is opened, and the water body can enter the body through the hollow cylindrical part. The water body entering the liquid outlet needs to pass through the filter element to filter out large particles of impurities in the water body. At this time, the water body passing through drives the impeller to rotate, and the impeller drives the transmission rod and the cleaning element to rotate to scrape and clean the outside of the filter element to prevent the filter element from being blocked, improve the filtering efficiency, and ensure the continuity and stability of sampling. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of the overall structure of a groundwater sampling device for hydrogeology proposed by the present invention;
[0021] Figure 2 A schematic diagram of the cross-sectional structure of a lightweight disc block at the top of a groundwater sampling device for hydrogeology proposed by the present invention;
[0022] Figure 3 A schematic cross-sectional structure diagram of a telescopic tube 1 of a groundwater sampling device for hydrogeology proposed by the present invention;
[0023] Figure 4 A schematic cross-sectional structure diagram of a hydrogeological groundwater sampling device body proposed by the present invention;
[0024] Figure 5 This is a schematic diagram of the structure of a one-way valve for groundwater sampling equipment for hydrogeology proposed by the present invention;
[0025] Figure 6 A schematic cross-sectional structure diagram of a liquid outlet of a groundwater sampling device for hydrogeology proposed by the present invention;
[0026] Figure 7 This is a schematic diagram of the structure of a cleaning component of a groundwater sampling device for hydrogeology proposed by the present invention;
[0027] Figure 8 A schematic cross-sectional structure diagram of a bottom connecting pipe of a groundwater sampling device for hydrogeology proposed by the present invention;
[0028] Fig. 9 This is a schematic structural diagram of a telescopic tube 2 of a hydrogeological groundwater sampling device proposed by the present invention;
[0029] Fig.10 The present invention provides a schematic cross-sectional structure diagram of a telescopic tube 2 of a groundwater sampling device for hydrogeology.
[0030] In the figure: 1. body; 2. liquid inlet mechanism; 21. liquid outlet; 22. hollow cylindrical member; 23. top fixing plate; 24. spring one; 25. limit plate; 26. positioning rod; 27. impeller; 28. transmission rod; 29. filter element; 210. cleaning element; 3. balancing mechanism; 31. top light disc block; 32. telescopic tube one; 33. top disc connecting block; 34. connecting rod; 35. float; 36. bottom connecting sleeve; 37. bottom connecting tube; 38. threaded rod; 39. spring two; 310. top air outlet; 311. piston member; 312. spring three; 313. one-way valve; 4. connecting rope; 5. trigger mechanism; 51. first through slot; 52. second through slot; 53. square limit slot; 54. through hole square fixing block; 55. telescopic tube two; 56. trapezoidal block; 57. spring four. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0032] See also Figure 1-Figure 10A groundwater sampling device for hydrogeology includes a body 1, which is used as the main structural support and bearing component of the device, provides the installation and connection basis of various mechanisms, and ensures the stability and durability of the device during use; a liquid inlet mechanism 2, which is arranged at the bottom of the body 1, and the body 1 is used to provide stable water input, and at the same time preliminarily filters the water sample to remove large impurities therein to ensure the accuracy of subsequent sampling operations and the normal operation of the device; a balancing mechanism 3, which is arranged at the top of the body 1, and is used to balance the body 1 in the water. Balance ensures that the body 1 always remains in a vertical state, thereby improving the positioning accuracy and operating stability of the sampling equipment; a connecting rope 4 is arranged on the top of the balancing mechanism 3, and is used to facilitate the lowering of the body 1, ensuring that the operation process of the equipment in the water body is more stable and convenient, and at the same time providing support for the recovery of the body 1; a trigger mechanism 5 is arranged on the body 1, and is used to trigger the sampling water body after the balancing mechanism 3 keeps the body 1 vertical. This design is intended to ensure that the sampler is sampled in the correct vertical position to prevent mixing of samples or inaccurate sampling due to position offset or failure of depth control.
[0033] The liquid inlet mechanism 2 includes a liquid outlet 21, which is fixedly connected to the bottom of the body 1. A hollow cylindrical member 22 is fixedly connected to the inner wall of the liquid outlet 21. A top fixing plate 23 is fixedly connected to the inner wall of the liquid outlet 21. One end of a spring 24 is fixedly connected to the outer wall of the top fixing plate 23. The other end of the spring 24 is fixedly connected to a limiting disk 25. The outer wall of the limiting disk 25 is fixedly connected to a positioning rod 26. An impeller 27 is rotatably connected to the inner wall of the hollow cylindrical member 22. One end of a transmission rod 28 is fixedly connected to the outer wall of the impeller 27. A cleaning member 210 is fixedly connected to the other end of the transmission rod 28. A filter member 29 is fixedly connected to the outer wall of the liquid outlet 21. A hollow through groove is provided on the inner wall of the hollow cylindrical member 22 for the passage of water. The outer wall of the positioning rod 26 is connected to the top fixing plate 23. The inner wall of the fixed plate 23 is slidably connected, and the positioning rod 26 drives the limit plate 25 to move back and forth stably through this sliding connection. The spring 24 presses the limit plate 25 to block the hollow through groove of the hollow cylindrical member 22, so that water cannot pass through the hollow through groove of the hollow cylindrical member 22 in the initial state. This design ensures the closedness of the equipment before startup. A through hole is opened on the filter element 29 to allow water to pass through and filter out large impurities and particulate matter in the water to ensure the accuracy of sampling and the normal operation of the equipment. The outer wall of the cleaning element 210 contacts the filter element 29. When the flow of water drives the impeller 27 to rotate, the impeller 27 drives the transmission rod 28 and the cleaning element 210 to rotate. The cleaning element 210 rotates to scrape and clean the outer wall of the filter element 29 to prevent clogging by large impurities.
[0034] The balancing mechanism 3 comprises a top light disc block 31, one end of a telescopic tube 32 is fixedly connected to the inner wall of the top light disc block 31, the other end of the telescopic tube 32 is fixedly connected to a top disc connecting block 33, a connecting rod 34 is fixedly connected to the outer wall of the top disc connecting block 33, a floating buoy 35 is fixedly connected to the side of the connecting rod 34 away from the top disc connecting block 33, a bottom connecting sleeve 36 is fixedly connected to the bottom of the top light disc block 31, a bottom connecting pipe 37 is connected to the inner wall piston of the bottom connecting sleeve 36, a threaded rod 38 is connected to the thread of the bottom connecting sleeve 36, and a spring 23 is fixedly connected to the inner wall of the telescopic tube 32. 9. A top air outlet 310 is provided at the top of the telescopic tube 32. One end of a spring 312 is fixedly connected to the inner wall of the body 1. The other end of the spring 312 is fixedly connected to a piston member 311. A one-way valve 313 is provided on the piston member 311. The outer wall of the top disc connecting block 33 is slidably connected to the inner wall of the top light disc block 31. The outer wall of the connecting rod 34 is piston-connected to the inner wall of the top light disc block 31. The outer wall of the piston member 311 is fixedly connected to the outer wall of the bottom connecting tube 37. The outer wall of the piston member 311 is piston-connected to the inner wall of the body 1. The top of the top light disc block 31 is fixedly connected to a connecting rope 4.
[0035] The trigger mechanism 5 includes a first through groove 51, which is arranged on the inner wall of the top lightweight disc block 31, and a second through groove 52 is opened on the inner wall of the bottom connecting tube 37. A square limiting groove 53 is arranged on the top of the body 1. A through-hole square fixing block 54 is fixedly connected to the inner wall of the second through groove 52, and one end of the telescopic tube 2 55 is fixedly connected to the outer wall of the through-hole square fixing block 54, and a trapezoidal block 56 is fixedly connected to the other end of the telescopic tube 2 55. A spring 4 57 is fixedly connected to the inner wall of the telescopic tube 2 55. The first through groove 51 is connected to the second through groove 52, and a through hole is opened on the inner wall of the through-hole square fixing block 54. The inner wall of the telescopic tube 2 55 and the second through groove 52 are connected to each other through the through hole of the through-hole square fixing block 54.
[0036] In summary, when the hydrogeological groundwater sampling device is used, the top lightweight disc block 31 is first pressed, and the top lightweight disc block 31 drives the bottom connecting sleeve 36; the bottom connecting tube 37; the threaded rod 38 and the piston member 311 to move downward. At this time, the air in the body 1 is discharged upward through the one-way valve 313. At this time, the spring three 312 is stretched and stored until the bottom connecting tube 37 drives the trapezoidal block 56 to contact the inner wall of the square limit groove 53. At this time, the trapezoidal block 56 is squeezed and compressed into the bottom connecting tube 37, and the trapezoidal block 56 squeezes the telescopic tube two 55. The spring four 57 in the telescopic tube two 55 is compressed until the trapezoidal block 56 continues to move downward and no longer contacts the inner wall of the square limit groove 53. Under the action of the spring four 57, the telescopic tube two 55 is extended and the trapezoidal block 56 is moved in a direction away from the spring four 57, so that the trapezoidal block 56 is in contact with the outer wall of the square limit groove 53 and is connected. At this time, the spring three 312 has completed the storage of force.
[0037] Then, the body 1 is placed on the toxic water body that needs to be tested. At this time, the four floats 35 provide buoyancy in four directions. The buoyancy of the four floats 35 is transmitted to the top lightweight disc block 31 through the connecting rod 34, the top disc connecting block 33, the telescopic tube 1 32 and the spring 2 39 on the inner wall of the telescopic tube 1 32, so that the top lightweight disc block 31 remains flush with the water surface. The principle of this design is that through the balance of buoyancy, there is uniform buoyancy in four directions on the top of the top lightweight disc block 31, so that the body 1 is in a stable horizontal position. The buoyancy is a vertical upward force, and when the four floats 35 are evenly distributed and provide the same buoyancy, it can ensure that the top lightweight disc block 31 remains flush with the water surface. The uniform distribution of buoyancy eliminates the risk of tilting or shifting of the body 1 due to unbalanced buoyancy, and avoids the uneven buoyancy causing the equipment to tilt or shift in position. The float 35 transmits force to the top lightweight disc block 31 through interaction, thereby effectively controlling the vertical position of the equipment and ensuring the accuracy of the sampling process and the stability of the equipment in the water.
[0038] Then, when the floats 35 in four directions are all located at the bottom of the water, the buoyancy provided by the four floats 35 drives the connecting rod 34 and the top disc connecting block 33 to move upward, so that the telescopic tube 1 32 and the spring 2 39 in the telescopic tube 1 32 are compressed. Since the telescopic tube 1 32 is compressed, the amount of air in the first through slot 51 remains unchanged. At this time, negative pressure is formed in the first through slot 51, so that negative pressure is formed in the second through slot 52. The negative pressure of the second through slot 52 is transmitted to the telescopic tube 2 55 through the through hole of the through hole square fixing block 54, so that the telescopic tube 2 55 is compressed, and the telescopic tube 2 55 drives the ladder The trapezoidal block 56 is no longer clamped to the inner wall of the square limit groove 53, and the bottom connecting pipe 37 can move upward relative to the square limit groove 53 and the body 1, so that the tension of the spring 312 is released and the piston 311 and the bottom connecting pipe 37 move upward, so that negative pressure is formed in the body 1 and water is pumped. Only when the four floats 35 in four directions are all located at the bottom of the water, the buoyancy provided is sufficient to retract the trapezoidal block 56, thus achieving automatic water pumping. This pumping process can only ensure that the trapezoidal block 56 is retracted and trigger the negative pressure system when the four floats 35 are all located at the bottom of the water. Therefore, the system ensures that the pumping mechanism can only be started when the floats 35 are completely sunk, ensuring accurate water extraction.
[0039] When the piston member 311 moves upward, negative pressure is formed at the bottom of the piston member 311, so that the limit plate 25 moves upward under the action of the negative pressure, so that the inner wall of the hollow cylindrical member 22 is opened, and water can enter the body 1 through the hollow cylindrical member 22. The water entering the liquid outlet 21 needs to pass through the filter member 29 to filter large particles of impurities in the water. At this time, the passing water drives the impeller 27 to rotate, and the impeller 27 drives the transmission rod 28 and the cleaning member 210 to rotate to scrape and clean the outside of the filter member 29 to prevent the filter member 29 from being blocked, thereby improving the filtering efficiency and ensuring the continuity and stability of sampling.
[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
Claims
1. A groundwater sampling device for hydrogeology, characterized in that: include A body (1) is used as the main structural support and load-bearing component of the device; A liquid inlet mechanism (2), the liquid inlet mechanism (2) being arranged at the bottom of the machine body (1), and the machine body (1) being used to provide a stable water input; A balancing mechanism (3), the balancing mechanism (3) being arranged on the top of the machine body (1), and the balancing mechanism (3) being used to balance the machine body (1) in a body of water; A connecting rope (4) is arranged on the top of the balancing mechanism (3) and is used to facilitate the lowering of the machine body (1), thereby ensuring that the operation process of the device in the water body is more stable and convenient, and at the same time providing support for the recovery of the machine body (1); A trigger mechanism (5) is arranged on the machine body (1) and is used to trigger the sampling of water after the balancing mechanism (3) keeps the machine body (1) vertical.
2. A groundwater sampling device for hydrogeology according to claim 1, characterized in that: The liquid inlet mechanism (2) comprises a liquid outlet (21), the liquid outlet (21) is fixedly connected to the bottom of the machine body (1), a hollow cylindrical member (22) is fixedly connected to the inner wall of the liquid outlet (21), a top fixing plate (23) is fixedly connected to the inner wall of the liquid outlet (21), and one end of a spring (24) is fixedly connected to the outer wall of the top fixing plate (23).
3. A groundwater sampling device for hydrogeology according to claim 2, characterized in that: The other end of the spring 1 (24) is fixedly connected to a limit plate (25), the outer wall of the limit plate (25) is fixedly connected to a positioning rod (26), the inner wall of the hollow cylindrical member (22) is rotatably connected to an impeller (27), the outer wall of the impeller (27) is fixedly connected to one end of a transmission rod (28), the other end of the transmission rod (28) is fixedly connected to a cleaning member (210), and the outer wall of the liquid outlet (21) is fixedly connected to a filter member (29).
4. A groundwater sampling device for hydrogeology according to claim 3, characterized in that: A hollow through groove is provided on the inner wall of the hollow cylindrical member (22), and the outer wall of the positioning rod (26) is slidably connected to the inner wall of the top fixing plate (23).
5. The groundwater sampling device for hydrogeology according to claim 3, characterized in that: The filter element (29) is provided with a through hole, and the outer wall of the cleaning element (210) abuts against the filter element (29).
6. A groundwater sampling device for hydrogeology according to claim 3, characterized in that: The balancing mechanism (3) comprises a top lightweight disc block (31), one end of a telescopic tube (32) being fixedly connected to the inner wall of the top lightweight disc block (31), the other end of the telescopic tube (32) being fixedly connected to a top disc connecting block (33), a connecting rod (34) being fixedly connected to the outer wall of the top disc connecting block (33), and a float (35) being fixedly connected to the side of the connecting rod (34) away from the top disc connecting block (33).
7. The groundwater sampling device for hydrogeology according to claim 3, characterized in that: The bottom of the top light disc block (31) is fixedly connected to a bottom connecting sleeve (36), the inner wall piston of the bottom connecting sleeve (36) is connected to a bottom connecting pipe (37), the thread of the bottom connecting sleeve (36) is connected to a threaded rod (38), the inner wall of the telescopic tube (32) is fixedly connected to a spring (39), the top of the telescopic tube (32) is provided with a top air outlet (310), one end of a spring (312) is fixedly connected to the inner wall of the body (1), the other end of the spring (312) is fixedly connected to a piston (311), and a one-way valve (313) is provided on the piston (311).
8. The groundwater sampling device for hydrogeology according to claim 7, characterized in that: The outer wall of the top disc connection block (33) is slidably connected to the inner wall of the top light disc block (31), and the outer wall of the connecting rod (34) is piston-connected to the inner wall of the top light disc block (31).
9. A groundwater sampling device for hydrogeology according to claim 8, characterized in that: The outer wall of the piston member (311) is fixedly connected to the outer wall of the bottom connecting pipe (37), the outer wall of the piston member (311) is piston-connected to the inner wall of the machine body (1), and the top of the top lightweight disc block (31) is fixedly connected to a connecting rope (4).
10. A groundwater sampling device for hydrogeology according to claim 9, characterized in that: The trigger mechanism (5) comprises a first through groove (51), the first through groove (51) being arranged on the inner wall of the top light disc block (31), the inner wall of the bottom connecting tube (37) being provided with a second through groove (52), the top of the body (1) being provided with a square limiting groove (53), the inner wall of the second through groove (52) being fixedly connected with a through hole square fixing block (54), the outer wall of the through hole square fixing block (54) being fixedly connected with one end of a telescopic tube 2 (55), the other end of the telescopic tube 2 (55) being fixedly connected with a trapezoidal block (56), and the inner wall of the telescopic tube 2 (55) being fixedly connected with a spring 4 (57).