A groundwater sampling device for hydrogeology

Abstract

The present invention relates to the technical field of geological sampling, and specifically discloses a groundwater sampling device for hydrogeology, comprising a sampling column, a plurality of storage tanks provided on the sidewall of the sampling column, a plurality of exhaust devices, and a plurality of water storage boxes; the plurality of storage tanks are distributed in a vertical direction, the storage tanks are inclined, and the height of one end of the storage tank near the outer wall of the sampling column is higher than the height of the other end of the storage tank; an exhaust device is connected to each storage tank; a water storage box is slidably provided in each storage tank; the water storage box includes a solid box body and a through hole provided in a vertical direction at one end of the box body near the outer wall of the sampling column; the depth of the storage tank is greater than the length of the box body, and when the box body is completely inside the storage tank, the end of the box body near the outer wall of the sampling column can seal the storage tank. The groundwater sampling device for hydrogeology of the present invention can efficiently complete water sampling operations at multiple depths and can effectively improve water sampling efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of geological sampling, and in particular to a groundwater sampling device used in hydrogeology. Background Art

[0002] In hydrogeological research, accurate groundwater sampling at different depths is crucial for obtaining groundwater resource information, analyzing water quality, and studying the patterns of groundwater movement. Accurate groundwater sampling provides crucial support for the rational development and utilization of water resources, water pollution prevention and control, and geological disaster prediction.

[0003] Traditional groundwater sampling methods currently have numerous drawbacks. Some conventional sampling equipment is complex and requires the coordinated operation of multiple electrical devices. This not only increases equipment cost and maintenance difficulties, but also significantly limits its use in complex field environments or areas with limited power supply. Any electrical equipment failure can hinder the entire sampling process.

[0004] Some existing sampling devices struggle to accurately obtain water samples at varying depths. During the sampling process, the inability to accurately control the sampling depth can easily lead to water samples being collected at depths that differ from expectations, affecting the accuracy of subsequent analyses of groundwater quality, composition, and other indicators at varying depths, and thus interfering with accurate assessments of hydrogeological conditions.

[0005] For work scenarios requiring sampling at numerous locations, traditional sampling methods are cumbersome and inefficient. Workers need to spend considerable time and energy performing repetitive operations, which not only increases labor costs but also prolongs the sampling cycle, failing to meet the demand for rapid and efficient groundwater sampling.

[0006] In summary, it is of great practical significance to develop a device with a simple structure, which does not rely on too many electrical equipment, can accurately sample groundwater at different depths, and has efficient operation. Summary of the Invention

[0007] The object of the present invention is to provide a groundwater sampling device for hydrogeology, which can efficiently complete water sampling operations at multiple depths and effectively improve water sampling efficiency.

[0008] The present invention is achieved through the following technical solutions: the groundwater sampling device for hydrogeology of the present invention includes a sampling column, a plurality of storage tanks opened on the side wall of the sampling column, a plurality of exhaust devices, and a plurality of water storage boxes; the plurality of storage tanks are distributed in the vertical direction, the storage tanks are inclined, and the height of one end of the storage tank close to the outer wall of the sampling column is higher than the height of the other opposite end; one exhaust device is connected to one of the storage tanks; one of the water storage boxes is slidably arranged in one of the storage tanks; the water storage box includes a solid box body and a through hole opened in the vertical direction at one end of the box body close to the outer wall of the sampling column; the depth of the storage tank is greater than the length of the box body, and when the box body is entirely inside the storage tank, the end of the box body close to the outer wall of the sampling column can close the storage tank.

[0009] Furthermore, the exhaust device includes a groove provided on the side of the sampling column away from the storage tank, an exhaust pipe horizontally provided on the inner wall of the groove, and a pressure valve connected to the exhaust pipe; the exhaust pipe is connected to the interior of the storage tank.

[0010] Furthermore, the pressure valve includes an air pressure tube arranged vertically and connected to the side wall of the exhaust pipe, a blocking rod slidably arranged in the air pressure tube, an exhaust hole opened on the blocking rod, and a diaphragm sleeved on the lower end of the air pressure tube; the lower end of the blocking rod abuts against the diaphragm; the blocking rod is used to close the exhaust pipe, the diaphragm is made of an elastic material, and the exhaust pipe and the air pressure tube are combined to form a cross structure; the part of the blocking rod located above the exhaust hole is sealed and slidably connected to the inner wall of the air pressure tube.

[0011] Furthermore, a collar is fixedly provided on the outer wall of the lower end portion of the air pressure tube; the diaphragm is provided between the collar and the air pressure tube, and the collar is used to fix the diaphragm.

[0012] Furthermore, a gap is provided between the inner wall of the lower end of the air pressure tube and the outer wall of the lower end of the blocking rod; and a pressure regulating device is connected to the side wall of the lower end of the air pressure tube.

[0013] Furthermore, the pressure regulating device includes a pressure regulating tube connected to the side wall of the air pressure tube, a piston block sealed and slidingly connected to the inner wall of the pressure regulating tube, a fixed block fixed to the end of the pressure regulating tube away from the air pressure tube, a screw threadedly connected to the fixed block, and a knob provided at the end of the screw provided on the outside of the pressure regulating tube; one end of the screw provided in the pressure regulating tube is rotatably connected to the piston block.

[0014] Furthermore, the exhaust device also includes a first magnetic block arranged on the inner top wall of the groove, and a second magnetic block arranged on the upper end of the blocking rod; the first magnetic block is arranged directly above the second magnetic block, and the first magnetic block and the second magnetic block are attracted to each other; when the second magnetic block is attached to the first magnetic block, the exhaust hole is located in the exhaust pipe.

[0015] Furthermore, a timer is fixedly provided on the inner side wall of the storage tank, and a push-type switch is provided on a side of the timer close to the box body.

[0016] Furthermore, a drain pipe is fixedly connected to the outer wall of the box body near the axis of the sampling column, and a sliding hole is opened on the inner wall of the groove, and the sliding hole is used to connect the storage tank and the groove; the drain pipe is sealingly slidably arranged in the sliding hole; the drain pipe is connected to the through hole; the end of the drain pipe away from the box body is arranged in the groove, and the outer wall of one end of the drain pipe arranged in the groove is threadedly connected with a fixing nut, and the end of the drain pipe arranged in the groove is provided with a sealing plug.

[0017] Furthermore, a hanging ring is provided at the upper end of the sampling column.

[0018] The technical solution of the present invention has at least the following advantages and beneficial effects: The groundwater sampling device for hydrogeology of the present invention, when in use, first injects gas into the storage tank through the exhaust device. The gas squeezes a portion of the box body out of the storage tank, so that the through-hole of the box body is completely outside the sampling column. The sampling column is then hung on a connecting rope and dropped into the water body for sampling. When the sampling column descends to a certain depth, the exhaust valve opens, and the gas in the storage tank is discharged through the exhaust valve. The gas slides into the storage tank through the box body under its own gravity. At the same time, the water in the through-hole of the box body also enters the storage tank and is sealed in the storage tank by the outer wall of the box body. In this way, when the sampling column is at different depths, different exhaust valves are triggered, so that water at different depths is stored in the corresponding storage tank. Therefore, the device can accurately sample water bodies at different depths, does not require redundant electrical equipment, and has higher stability. In addition, the device is simple to set up, which is more simple and efficient for situations where sampling at a large number of points is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a groundwater sampling device for hydrogeology provided by an embodiment of the present invention from one perspective;

[0020] Figure 2 A schematic structural diagram of a groundwater sampling device for hydrogeology from two perspectives provided in an embodiment of the present invention;

[0021] Figure 3A schematic diagram of the internal structure of a groundwater sampling device for hydrogeology provided by an embodiment of the present invention;

[0022] Figure 4 A schematic structural diagram of a sampling column portion provided in an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of the internal structure of a sampling column provided in an embodiment of the present invention;

[0024] Figure 6 A schematic structural diagram of a water storage box provided by an embodiment of the present invention from one perspective;

[0025] Figure 7 A schematic structural diagram of a water storage box provided by an embodiment of the present invention from two perspectives;

[0026] Figure 8 A schematic diagram of the structure inside the water storage box provided by an embodiment of the present invention;

[0027] Figure 9 for Figure 2 Enlarged view of part A;

[0028] Figure 10 A schematic diagram of the structure inside a storage tank provided by an embodiment of the present invention;

[0029] Figure 11 for Figure 10 Magnified view of part B.

[0030] Icons: 10-sampling column, 11-storage tank, 12-timer, 13-hanging ring, 14-sliding hole, 20-water storage box, 21-box body, 22-through hole, 23-drain pipe, 24-sealing plug, 25-nut, 30-exhaust device, 31-groove, 32-exhaust pipe, 33-air pressure pipe, 34-blocking rod, 35-exhaust hole, 36-diaphragm, 37-ring, 38-first magnetic block, 39-second magnetic block, 40-pressure regulating device, 41-pressure regulating pipe, 42-piston block, 43-fixing block, 44-screw, 45-knob. DETAILED DESCRIPTION

[0031] Example

[0032] The following is further described in conjunction with specific embodiments. Figure 1 -Attached Figure 11As shown, the groundwater sampling device for hydrogeology of this embodiment includes a sampling column 10, a plurality of storage tanks 11 opened on the side wall of the sampling column 10, a plurality of exhaust devices 30, and a plurality of water storage boxes 20; the plurality of storage tanks 11 are distributed in the vertical direction, the storage tanks 11 are inclined, and the height of one end of the storage tank 11 close to the outer wall of the sampling column 10 is higher than the height of the other end; an exhaust device 30 is connected to one storage tank 11; a water storage box 20 is slidably arranged in one storage tank 11; the water storage box 20 includes a solid box body 21, and a through hole 22 opened in the vertical direction at one end of the box body 21 close to the outer wall of the sampling column 10; the depth of the storage tank 11 is greater than the length of the box body 21. When the box body 21 is entirely inside the storage tank 11, the end of the box body 21 close to the outer wall of the sampling column 10 can close the storage tank 11. Specifically, during use, gas is first injected into the storage tank 11 through the exhaust device 30. The gas squeezes a portion of the box body 21 out of the storage tank 11, so that the through hole 22 of the box body 21 is completely outside the sampling column 10. The sampling column 10 is then hung on a connecting rope and dropped into the water for sampling. When the sampling column 10 descends to a certain depth, the exhaust valve opens, and the gas in the storage tank 11 is discharged through the exhaust valve. The gas slides into the storage tank 11 under the action of its own gravity through the box body 21. At the same time, the water in the through hole 22 of the box body 21 also enters the storage tank 11 and is sealed in the storage tank 11 by the outer wall of the box body 21. In this way, when the sampling column 10 is at different depths, different exhaust valves will be triggered, thereby storing water at different depths in the corresponding storage tank 11. Therefore, this device can accurately sample water at different depths without the need for redundant electrical equipment, and has higher stability. In addition, the device is simple to set up, which is more simple and efficient for situations where a large number of sampling points are required.

[0033] The exhaust device 30 in this embodiment includes a groove 31 provided on the side of the sampling column 10 away from the storage tank 11, an exhaust pipe 32 provided horizontally on the inner wall of the groove 31, and a pressure valve connected to the exhaust pipe 32; the exhaust pipe 32 is connected to the interior of the storage tank 11. The pressure valve includes a vertically arranged air pressure pipe 33 connected to the side wall of the exhaust pipe 32, a blocking rod 34 slidably provided in the air pressure pipe 33, an exhaust hole 35 provided on the blocking rod 34, and a diaphragm 36 sleeved on the lower end of the air pressure pipe 33; the lower end of the blocking rod 34 abuts against the diaphragm 36; the blocking rod 34 is used to seal the exhaust pipe 32, and the diaphragm 36 is made of an elastic material. The exhaust pipe 32 and the air pressure pipe 33 are combined to form a cross structure; the portion of the blocking rod 34 located above the exhaust hole 35 is sealed and slidably connected to the inner wall of the air pressure pipe 33. Specifically, when the set pressure is reached, the pressure valve automatically opens the exhaust pipe 32, allowing the gas in the storage tank 11 to be discharged. The opening principle of the pressure valve in this embodiment is as follows: water pressure pushes the diaphragm 36 at the lower end of the air pressure tube 33, causing it to sag into the interior of the air pressure tube 33, which in turn pushes the blocking rod 34 upward. The different pressures of water at different depths exert different forces on the diaphragm 36, resulting in different amounts of deformation of the diaphragm 36, and thus, different heights to which the blocking rod 34 is lifted. When the water reaches a predetermined depth, the water pressure is sufficient to push the blocking rod 34 until the vent 35 is within, or partially within, the vent tube 32. At this point, the gas in the reservoir 11 can be discharged through the vent tube 32 and the vent 35 (the housing 21 is primarily made of solid metal, so the gravity of the housing 21 allows the gas in the reservoir 11 to be rapidly discharged), thereby storing the water at the corresponding depth in the corresponding reservoir 11. This allows the sampling column 10 to automatically store water at that depth in the reservoir 11 when it reaches the predetermined depth, eliminating the need for manual estimation of the sampling column 10 depth and simplifying operation.

[0034] In this embodiment, a collar 37 is fixedly provided on the outer wall of the lower end of the air pressure tube 33; a diaphragm 36 is provided between the collar 37 and the air pressure tube 33, and the collar 37 is used to fix the diaphragm 36. A gap is provided between the inner wall of the lower end of the air pressure tube 33 and the outer wall of the lower end of the blocking rod 34; a pressure regulating device 40 is connected to the side wall of the lower end of the air pressure tube 33. The pressure regulating device 40 includes a pressure regulating tube 41 connected to the side wall of the air pressure tube 33, a piston block 42 sealingly and slidingly connected to the inner wall of the pressure regulating tube 41, a fixed block 43 fixed to the end of the pressure regulating tube 41 away from the air pressure tube 33, a screw 44 threadedly connected to the fixed block 43, and a knob 45 provided on the end of the screw 44 provided on the outside of the pressure regulating tube 41; one end of the screw 44 provided in the pressure regulating tube 41 is rotatably connected to the piston block 42. Specifically, in this embodiment, the timing of exhausting the exhaust pipe 32 is adjusted by presetting different air pressures in the air pressure pipe 33. The principle is that when the air pressure in the lower portion of the air pressure pipe 33 is low, only a small amount of water pressure is required to push the exhaust hole 35 on the blocking rod 34 into the exhaust pipe 32. When the air pressure in the lower portion of the air pressure pipe 33 is high, a higher water pressure is required to push the diaphragm 36 and the blocking rod 34 until the exhaust hole 35 is connected to the exhaust pipe 32. Therefore, the air pressure pipe 33 only needs to be pre-inflated so that the exhaust hole 35 is exactly in the exhaust pipe 32 when it reaches the predetermined water depth. The air compressor can be used to directly apply pressure, or the screw 44 can be turned by the knob 45, so that the screw 44 pushes the piston block 42 to move in the pressure regulating tube 41, and then pushes the gas in the pressure regulating tube 41 into the air pressure tube 33. The distance moved by the piston block 42 is different, and the volume of the connecting part of the pressure regulating tube 41 and the air pressure tube 33 is different. Under the premise of a certain amount of gas, the air pressure is also different. By adjusting the number of turns of the knob 45, the distance moved by the piston block 42 can be adjusted, and then the preset air pressure of the air pressure tube 33 can be adjusted.

[0035] The exhaust device 30 in this embodiment also includes a first magnetic block 38 provided on the inner top wall of the groove 31, and a second magnetic block 39 provided on the upper end of the blocking rod 34. The first magnetic block 38 is provided directly above the second magnetic block 39, and the first magnetic block 38 and the second magnetic block 39 attract each other. When the second magnetic block 39 is attached to the first magnetic block 38, the exhaust hole 35 is located in the exhaust pipe 32. Specifically, the first magnetic block 38 is used to attract the second magnetic block 39, thereby allowing the blocking rod 34 to move upward quickly. The purpose of this is that when the through hole 22 is partially in the exhaust pipe 32, the second magnetic block 39 is also within the magnetic force range of the first magnetic block 38. Therefore, the second magnetic block 39 can be directly attracted to the first magnetic block 38, so that the exhaust hole 35 is completely in the exhaust pipe 32, which can achieve faster exhaust. At this time, the box body 21 can also enter the storage tank 11 more quickly. It should be noted that the second magnetic block 39 and the blocking rod 34 are not completely sucked up by the first magnetic block 38, but provide partial force on the diaphragm 36. Therefore, when the sampling is completed and the sampling column 10 is taken out of the water, the water pressure decreases, the supporting force of the diaphragm 36 on the blocking rod 34 decreases, and the first magnetic block 38 cannot simultaneously absorb the second magnetic block 39 and the blocking rod 34. Therefore, the blocking rod 34 will move downward, thereby blocking the exhaust pipe 32 again. At this time, the interior of the storage tank 11 is a closed space, and the box body 21 cannot be directly taken out of the storage tank 11. Therefore, it also avoids the situation where the box body 21 falls out of the storage tank 11 during the process of taking out the sampling column 10, causing the water sample to flow out. When it is necessary to manually remove the box body 21 from the storage tank 11, it is only necessary to manually push the second magnetic block 39 upward so that the exhaust hole 35 is in the exhaust pipe 32, and the storage tank 11 is connected to the outside world.

[0036] In this embodiment, a timer 12 is fixedly provided on the inner wall of the storage tank 11 , and a push-type switch is provided on a side of the timer 12 close to the box body 21 . Specifically, before placing the sampling column 10 in water, all timers 12 are started, and then the sampling column 10 is placed in the water. When the sampling column 10 reaches the predetermined depth and the cartridge 21 enters the storage tank 11, the outer wall of the cartridge 21 touches the push-button switch of the timer 12, thereby stopping the timer 12 (the timer 12 can also be set to off initially, and then the timer 12 is started by the cartridge 21 touching the push-button switch). This serves to determine the time when each exhaust device 30 is activated, that is, the time when the cartridge 21 enters the storage tank 11. As the water depth of the storage tanks 11 on the sampling column 10 increases from top to bottom, the timing of the timers 12 in the storage tanks 11 will increase sequentially. If any timer 12 does not conform to this sequential increase pattern, it can be determined that the exhaust device 30 connected to this storage tank 11 was not triggered at the predetermined time, and it can be determined that the water sample in the storage tank 11 is not the water sample of the predetermined depth. In this way, a preliminary judgment can be made as to whether the sampled water is at the predetermined depth, thereby avoiding affecting subsequent detection and judgment.

[0037] In this embodiment, a drain pipe 23 is fixedly connected to the outer wall of the box body 21 near the axis of the sampling column 10. A sliding hole 14 is formed in the inner wall of the groove 31, which is used to connect the storage tank 11 and the groove 31. The drain pipe 23 is sealed and slidably arranged in the sliding hole 14. The drain pipe 23 is connected to the through hole 22. The end of the drain pipe 23 away from the box body 21 is arranged in the groove 31. The outer wall of the end of the drain pipe 23 arranged in the groove 31 is threadedly connected to a fixing nut 25. The end of the drain pipe 23 arranged in the groove 31 is provided with a sealing plug 24. Specifically, connecting the drain pipe 23 to the side wall of the box body 21 facilitates the drainage of water from the storage tank 11 (specifically, the through hole 22). When drainage is required, the sealing plug 24 can be removed and the drain pipe 23 can be aligned with the corresponding container. A nut 25 is provided on the drain pipe 23, and the nut 25 will be stuck on the inner wall of the groove 31, so as to prevent the box body 21 from completely falling out of the storage tank 11 (mainly to prevent it from falling out when sampling in water). After removing the nut 25 from the drain pipe 23, the box body 21 can be completely removed from the storage tank 11.

[0038] The upper end of the sampling column 10 in this embodiment is provided with a hanging ring 13. Specifically, the hanging ring 13 can be used to connect a connecting rope.

[0039] In summary, the groundwater sampling device for hydrogeology of this embodiment, when in use, first injects gas into the storage tank 11 through the exhaust device 30. The gas squeezes a portion of the box body 21 out of the storage tank 11, so that the through hole 22 of the box body 21 is completely outside the sampling column 10. The sampling column 10 is then hung on the connecting rope and dropped into the water for sampling. When the sampling column 10 descends to a certain depth, the exhaust valve opens, and the gas in the storage tank 11 is discharged through the exhaust valve. The gas slides into the storage tank 11 through the box body 21 under its own gravity. At the same time, the water in the through hole 22 of the box body 21 also enters the storage tank 11 and is sealed in the storage tank 11 by the outer wall of the box body 21. In this way, when the sampling column 10 is at different depths, different exhaust valves will be triggered, thereby storing water at different depths in the corresponding storage tank 11. Therefore, the present device can accurately sample water bodies at different depths without the need for redundant electrical equipment, and has higher stability. The setup is simple, and the operation is simpler and more efficient when a large number of sampling points are required.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A groundwater sampling device for hydrogeology, characterized by: It comprises a sampling column (10), a plurality of storage tanks (11) opened on the side wall of the sampling column (10), a plurality of exhaust devices (30), and a plurality of water storage boxes (20); A plurality of storage tanks (11) are distributed in a vertical direction, the storage tanks (11) are arranged obliquely, and the height of one end of the storage tank (11) close to the outer wall of the sampling column (10) is higher than the height of the other end thereof; one exhaust device (30) is connected to one storage tank (11); and one water storage box (20) is slidably arranged in one storage tank (11); The water storage box (20) comprises a solid box body (21) and a through hole (22) vertically opened at one end of the box body (21) close to the outer wall of the sampling column (10); the depth of the storage tank (11) is greater than the length of the box body (21); when the box body (21) is entirely inside the storage tank (11), the end of the box body (21) close to the outer wall of the sampling column (10) can close the storage tank (11).

2. The groundwater sampling device for hydrogeology according to claim 1, characterized in that: The exhaust device (30) comprises a groove (31) provided on a side of the sampling column (10) away from the storage tank (11), an exhaust pipe (32) horizontally provided on the inner wall of the groove (31), and a pressure valve connected to the exhaust pipe (32); The exhaust pipe (32) is communicated with the interior of the storage tank (11).

3. The groundwater sampling device for hydrogeology according to claim 2, characterized in that: The pressure valve comprises an air pressure tube (33) vertically arranged and connected to the side wall of the exhaust pipe (32), a blocking rod (34) slidably arranged in the air pressure tube (33), an exhaust hole (35) provided on the blocking rod (34), and a diaphragm (36) sleeved on the lower end of the air pressure tube (33); the lower end of the blocking rod (34) abuts against the diaphragm (36); The blocking rod (34) is used to close the exhaust pipe (32), the diaphragm (36) is made of elastic material, and the exhaust pipe (32) and the air pressure pipe (33) are combined into a cross structure; the portion of the blocking rod (34) located above the exhaust hole (35) is sealed and slidably connected to the inner wall of the air pressure pipe (33).

4. The groundwater sampling device for hydrogeology according to claim 3, characterized in that: A collar (37) is fixedly provided on the outer wall of the lower end portion of the air pressure tube (33); the diaphragm (36) is arranged between the collar (37) and the air pressure tube (33), and the collar (37) is used to fix the diaphragm (36).

5. The groundwater sampling device for hydrogeology according to claim 4, characterized in that: A gap is provided between the inner wall of the lower end of the air pressure tube (33) and the outer wall of the lower end of the blocking rod (34); The side wall of the lower end of the air pressure tube (33) is connected to a pressure regulating device (40).

6. The groundwater sampling device for hydrogeology according to claim 5, characterized in that: The pressure regulating device (40) includes a pressure regulating tube (41) connected to the side wall of the air pressure tube (33), a piston block (42) sealingly and slidingly connected to the inner wall of the pressure regulating tube (41), a fixed block (43) fixed to one end of the pressure regulating tube (41) away from the air pressure tube (33), a screw (44) threadedly connected to the fixed block (43), and a knob (45) provided on the end of the screw (44) outside the pressure regulating tube (41); One end of the screw rod (44) disposed in the pressure regulating tube (41) is rotatably connected to the piston block (42).

7. The groundwater sampling device for hydrogeology according to claim 3, characterized in that: The exhaust device (30) further includes a first magnetic block (38) provided on the inner top wall of the groove (31), and a second magnetic block (39) provided on the upper end of the blocking rod (34); The first magnetic block (38) is arranged directly above the second magnetic block (39), and the first magnetic block (38) and the second magnetic block (39) are attracted to each other; when the second magnetic block (39) is attached to the first magnetic block (38), the exhaust hole (35) is located in the exhaust pipe (32).

8. The groundwater sampling device for hydrogeology according to claim 1, characterized in that: A timer (12) is fixedly provided on the inner side wall of the storage tank (11), and a push-type switch is provided on a side of the timer (12) close to the box body (21).

9. The groundwater sampling device for hydrogeology according to claim 2, characterized in that: A drain pipe (23) is fixedly connected to the outer wall of the box body (21) near the axis of the sampling column (10), and a sliding hole (14) is opened on the inner wall of the groove (31). The sliding hole (14) is used to connect the storage tank (11) and the groove (31); the drain pipe (23) is sealed and slidably arranged in the sliding hole (14); The drain pipe (23) is in communication with the through hole (22); one end of the drain pipe (23) away from the box body (21) is arranged in the groove (31); the outer wall of one end of the drain pipe (23) arranged in the groove (31) is threadedly connected with a fixing nut (25); and one end of the drain pipe (23) arranged in the groove (31) is provided with a sealing plug (24).

10. The groundwater sampling device for hydrogeology according to claim 1, characterized in that: A hanging ring (13) is provided at the upper end of the sampling column (10).

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