A groundwater sampling device for hydrogeology

Abstract

The present invention discloses a groundwater sampling device for hydrogeology, which belongs to the field of sampling devices, including a winch, a pull rope wound on the winch roller, and a support mechanism and a sampling mechanism; the support mechanism includes: a support ring, a limit ring, a bracket and multiple support wheel assemblies; the support wheel assembly includes: a first sliding frame, a first tension spring, a first rotating wheel, a second sliding frame, a second tension spring, a second rotating wheel and a slide rod; the sampling mechanism is connected to the lower end of the pull rope; the pull rope passes through the limit ring, and the support mechanism is placed on the sampling mechanism by gravity. Through the support mechanism, the sampling device can avoid the pull rope from contacting the inner wall of the monitoring well and the lower edge of the monitoring well to cause wear. Moreover, the support mechanism can make the pull rope more stable and can only shake slightly within the range of the limit ring.

Description

Technical Field

[0001] The invention belongs to the technical field of groundwater sampling devices, and in particular relates to a groundwater sampling device for hydrogeology. Background Art

[0002] Hydrological exploration is a key link in hydrogeology. Through comprehensive investigation and research of the groundwater system in a certain area, information about the distribution and movement of groundwater resources and their relationship with surface water bodies can be obtained.

[0003] In the existing hydrogeological survey process, it is usually necessary to conduct site selection drilling in the target area, drill a monitoring well, and then extend a sampling tube into the monitoring well through a pull rope to collect groundwater samples.

[0004] In the above-mentioned groundwater sampling equipment, the sampling tube is connected by a pull rope pulled by a winch. The pull rope itself is flexible, and a specified length of the pull rope is released during sampling to ensure that the sampling tube can enter the groundwater and collect groundwater samples at a specific depth. Therefore, during the sampling process, the flow of groundwater impacts the sampling tube, causing the pull rope to swing with the position of the winch as the suspension point, especially for deep wells, the shaking is more severe, affecting normal sampling; in addition, the pull rope swings and rubs against the edge or inner wall of the monitoring well, which causes the pull rope to wear, affecting the stability and service life of the pull rope.

[0005] Therefore, it is necessary to consider increasing the support for the middle part of the rope so that the end point of the rope is as close to the groundwater as possible when it swings, thereby reducing the swing amplitude of the sampling tube and avoiding friction between the rope and the inner wall or lower edge of the monitoring well. Summary of the invention

[0006] The object of the present invention is to provide a groundwater sampling device for hydrogeology, which is used to solve the problem of friction between a pull rope and the edge of a monitoring well.

[0007] In order to solve the above technical problems, the present invention is implemented by the following scheme:

[0008] A groundwater sampling device for hydrogeology, comprising a winch, a pull rope wound on a roller of the winch, a supporting mechanism and a sampling mechanism;

[0009] Supporting organizations include:

[0010] A support ring, a limiting ring, a bracket and a plurality of support wheel assemblies, wherein the support ring is sleeved on the limiting ring, and the support ring and the limiting ring are connected as a whole through the bracket; the axis of the limiting ring is parallel to the axis of the monitoring well;

[0011] The support wheel assembly includes:

[0012] The first sliding frame is movably mounted on the support ring, and the first sliding frame can move relative to the support ring along the radial direction of the limit ring; the length direction of the first sliding frame is consistent with the sliding direction of the first sliding frame; one end of the length direction of the first sliding frame is set as end A, and the other end is set as end B, end A is in the inner cavity of the support ring, and end B is outside the ring of the support ring;

[0013] A first tension spring, one end of which is fixedly connected to the A end of the first sliding frame, and the other end of which is fixedly connected to the support ring;

[0014] The first rotating wheel is rotatably connected to the B end of the first sliding frame; the plane where the axes of all the first rotating wheels are located is assumed to be a plane P, and the axis of the limiting ring is perpendicular to the plane P; the first tension spring enables the first sliding frame and the first rotating wheel to contact the inner wall of the monitoring well as a whole;

[0015] A second sliding frame is movably mounted on the first sliding frame, the second sliding frame can move relative to the first sliding frame along the length direction of the first sliding frame, and the second sliding frame is located on the outer ring of the support ring;

[0016] A second tension spring, one end of which is fixedly connected to the B end of the first sliding frame, and the other end of which is fixedly connected to the second sliding frame;

[0017] The second rotating wheel is rotatably connected to the second sliding frame, the rotating shaft axis of the second rotating wheel is parallel to the rotating shaft axis of the first rotating wheel, and the second rotating wheel is located below the first rotating wheel; the second tension spring can make the second sliding frame and the second rotating wheel group contact with the inner wall of the monitoring well as a whole;

[0018] A slide bar is fixedly connected to the second sliding frame; when the second rotating wheel is separated from the monitoring well, the restoring force of the second tension spring can make the slide bar, the second rotating wheel and the second sliding frame move as a whole, and the slide bar can contact the surface of the first rotating wheel and limit the rotation of the first rotating wheel;

[0019] The sampling mechanism is connected to the lower end of the pull rope; the pull rope passes through the limit ring, and the supporting mechanism is placed on the sampling mechanism by gravity.

[0020] A supporting mechanism is provided, and a limiting ring is provided on the pull rope. The limiting ring can limit the pull rope, and the supporting mechanism can move along the monitoring well. When it moves to the lower edge of the monitoring well, it can automatically clamp on the monitoring well to prevent the supporting mechanism from falling into the groundwater.

[0021] In addition, the supporting mechanism can be moved to the lower end of the monitoring well, and the sampling mechanism and the supporting mechanism begin to separate from the lower end of the monitoring well. The pull rope can only be swung with the point where the supporting mechanism is located as the endpoint, rather than with the point where the winch is located as the endpoint, shortening the distance that the pull rope can swing and making the sampling mechanism more stable when sampling.

[0022] Furthermore, the sampling mechanism comprises:

[0023] The connecting plate is located below the limiting ring; the pull rope is fixed on the connecting plate and passes through the limiting ring;

[0024] A mounting head, integrally arranged on the lower surface of the connecting plate;

[0025] A sampling box, connected to the mounting head;

[0026] Two openings are respectively arranged on the corresponding side walls of the sampling box;

[0027] A sampling tube is fixedly connected in the sampling box, with two ends of the sampling tube facing two openings respectively;

[0028] The first slide plate and the second slide plate are movably mounted on the corresponding outer side walls of the sampling box, and the first slide plate and the second slide plate can simultaneously open or close the corresponding two openings by sliding;

[0029] A connecting frame is located in the sampling box and is fixedly connected to the first slide plate and the second slide plate;

[0030] The electric push rod is used to move the connecting frame, the first slide plate and the second slide plate as a whole.

[0031] Furthermore, the mounting head and the sampling box are connected via a quick-release structure, and the quick-release structure comprises:

[0032] The quick-release seat is integrally arranged on the upper surface of the sampling box; a placement groove is downwardly opened on the upper surface of the quick-release seat, and the mounting head can be inserted into the placement groove;

[0033] A first annular groove is provided on a side wall of the mounting head along the axis of the mounting head, and the axis of the first annular groove coincides with the axis of the mounting head;

[0034] A quick release rod is movably mounted on the quick release seat, and the moving direction of the quick release rod is along the radial direction of the mounting head;

[0035] The clamping block is located in the first annular groove and is fixedly connected to one end of the quick release rod facing the mounting head;

[0036] The retraction groove is provided on the quick release seat, and the quick release rod and the clamping block are moved in a direction away from the axis of the mounting head so that the clamping block can enter the retraction groove;

[0037] The spring is sleeved on the quick-release rod, one end of which abuts against the clamping block, and the other end abuts against the inner wall of the retraction groove; under the restoring force of the spring, the clamping block can be located in the first annular groove.

[0038] The quick-release structure can facilitate the removal of the sampling mechanism from the supporting mechanism. The method of using the quick-release structure is: pull the quick-release rod to compress the spring and retract the card block into the retraction groove, so that the mounting head can be taken out from the placement groove. After the sampling mechanism is separated from the supporting mechanism, the sampling personnel opens the opening on the sampling box, and then rotates the sampling mechanism alone, using gravity to facilitate the removal of the sampled groundwater in the sampling tube cavity.

[0039] Furthermore, a wake board is fixedly connected to the first slide plate, the axis of the mounting head is parallel to the surface of the wake board, and the wake board can contact the water body.

[0040] The wake plate can assist the rotation of the sampling box. Due to fluid mechanics, the wake plate will inevitably face the downstream of the groundwater flow, so one end of the sampling tube can always be kept as the water inlet and the other end as the water outlet, and the flow direction of the sampled water in the sampling tube can be determined. With the wake plate limiting the angle of the sampling box, the sampling box will not rotate arbitrarily and significantly during the sampling process, ensuring stability during the sampling process.

[0041] Furthermore, the sampling mechanism also includes a water pressure sensor, which is installed on the outer bottom of the sampling box; a control terminal is provided in the sampling box, and the water pressure sensor and the electric push rod are electrically connected to the control terminal; the operator can send operation instructions to the control terminal through the control panel.

[0042] The water pressure sensor can determine the sampling depth. The depth of groundwater sampling can be adjusted according to sampling requirements.

[0043] Furthermore, the sampling mechanism also includes a drainage component, and the drainage component includes:

[0044] The equipment shell is fixedly connected to the upper end of the sampling box;

[0045] A mobile board, located in the device housing;

[0046] A connecting rod is fixedly connected to the upper surface of the moving plate, the axis of the connecting rod is parallel to the axis of the mounting head, the upper end of the connecting rod passes through the equipment shell, and a hole for the connecting rod to pass through is opened on the equipment shell, and the connecting rod and the hole are not sealed;

[0047] A third tension spring is sleeved on the connecting rod, the upper end of the third tension spring is fixedly connected to the inner upper end of the device shell, and the lower end is fixedly connected to the upper surface of the moving plate; a sleeve is fixedly connected to the sampling box, and the upper end of the connecting rod is in the sleeve;

[0048] The piston plate is fixedly connected to the upper end of the connecting rod, and the piston plate and the inner wall of the sleeve are kept sealed;

[0049] A connecting pipe, one end of which is connected to the sleeve and the other end of which is outside the sleeve; the connecting pipe and the sleeve are both filled with liquid in the cavity above the piston plate;

[0050] The moving rod is located at the side of the connecting pipe away from the sleeve. The moving rod can move relative to the connecting pipe due to the squeezing of water in the connecting pipe. One end of the moving rod is located in the connecting pipe, and the other end is located outside the connecting pipe.

[0051] A rack, fixedly connected to the moving rod;

[0052] The gear box is fixedly connected to the sampling tube through a connecting frame;

[0053] A turbine, fixedly connected to the output end of the gearbox;

[0054] A drive shaft, fixedly connected to the input end of the gear box;

[0055] The linkage gear is sleeved and fixedly connected to the driving shaft and meshes with the rack;

[0056] The utility model also comprises a release component for releasing the restoring force of the third tension spring.

[0057] The drainage device speeds up the flow rate of water in the sampling tube. According to Bernoulli's principle, the fluid flow rate in the sampling tube is fast and the pressure is small, while the water flow rate around the sampling tube is slow and the pressure is high. Therefore, the water near the sampling tube will inevitably fill the sampling tube, making the water collected by the sampling tube more comprehensive and more representative.

[0058] Further, the release assembly comprises:

[0059] A mounting bracket, fixedly connected to the inner surface of the sampling box;

[0060] A socket is provided on the circumferential side wall of the sleeve;

[0061] An insertion rod is inserted into the insertion hole, the insertion rod abuts against the upper surface of the piston plate, and the insertion rod can move relative to the insertion hole and be separated from the piston plate;

[0062] An abutment plate, fixedly connected to the insertion rod;

[0063] A fourth tension spring, one end of which is fixedly connected to the abutment plate, and the other end of which is fixedly connected to the mounting frame. When the fourth tension spring is in a free state, one end of the insertion rod passes through the insertion hole and abuts against the upper surface of the piston plate.

[0064] A first stop block is fixedly connected to an end of the insertion rod away from the insertion hole;

[0065] The second stop block is fixedly connected to the upper end of the connection frame. Under the action of the electric push rod, the second stop block can contact the first stop block, and the second stop block can make the first stop block move in a direction away from the sleeve.

[0066] The release assembly can be driven by an electric push rod to move, thereby driving the turbine to rotate during the sampling process, thereby achieving the above-mentioned purpose of comprehensively collecting the water body.

[0067] Furthermore, a guide ring is fixedly connected to the upper surface of the mounting head, the guide ring is sleeved on the pull rope, and the guide ring is inserted into the limiting ring.

[0068] The guide ring can guide the pull rope to ensure that the guide ring can enter the limiting ring, so that the lower end of the limiting ring can contact the upper surface of the connecting plate, so that the supporting mechanism can be stably placed on the sampling mechanism.

[0069] Compared with the prior art, the present invention has the following beneficial effects:

[0070] The present invention provides a support mechanism, and the support mechanism can move along the monitoring well. The pull rope passes through the support mechanism. Due to the limit of the pull rope by the support mechanism, the pull rope will not contact the inner wall of the monitoring well, and will not cause friction damage with the inner wall of the monitoring well; the support mechanism is separated from the sampling mechanism when it is at the lower edge of the monitoring well. Compared with the support mechanism being located at other positions, at this time, the distance from the pull rope on the sampling mechanism to the support mechanism is the shortest, the distance that the pull rope can swing is smaller, and the pull rope is less likely to contact and wear with the lower edge of the monitoring well. The support mechanism can make the pull rope more stable, and the pull rope can only swing slightly within the range of the limit ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Figure 1 It is a schematic diagram of the overall structure of the device;

[0072] Figure 2 It is a structural schematic diagram when the supporting mechanism and the sampling mechanism form a whole;

[0073] Figure 3 It is a schematic diagram of the structure inside the sampling box;

[0074] Figure 4 This is a schematic diagram of the internal structure of the quick release seat;

[0075] Figure 5 It is a schematic diagram of the internal structure of the sleeve;

[0076] Figure 6 This is a schematic diagram of the internal structure of the sampling box.

[0077] 1. Winch; 2. Pull rope; 3. Support ring; 4. Limit ring; 5. Bracket; 6. First sliding frame; 7. First tension spring; 8. First rotating wheel; 9. Second sliding frame; 10. Second tension spring; 11. Second rotating wheel; 12. Sliding rod; 13. Guide ring; 14. Connecting plate; 15. Mounting head; 16. Sampling box; 17. Sampling tube; 18. Opening; 19. First slide plate; 20. Second slide plate; 21. Connecting frame; 22. Electric push rod; 23. Water pressure sensor; 24. Control terminal; 25. Wake plate; 26 , quick-release seat; 27, first ring groove; 28, quick-release rod; 29, block; 30, retraction groove; 31, spring; 32, equipment shell; 33, movable plate; 34, connecting rod; 35, third tension spring; 36, sleeve; 37, piston plate; 38, connecting pipe; 39, movable rod; 40, rack; 41, gear box; 42, turbine; 43, drive shaft; 44, linkage gear; 45, mounting bracket; 46, socket; 47, plug rod; 48, abutment plate; 49, fourth tension spring; 50, second abutment block; 51, first abutment block. DETAILED DESCRIPTION

[0078] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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.

[0079] Example 1: See Figure 1 A groundwater sampling device for hydrogeology comprises a winch 1, a supporting mechanism and a sampling mechanism. A pull rope 2 is wound around the roller of the winch 1.

[0080] See Figure 2 , wherein the supporting mechanism comprises:

[0081] The support ring 3 is annular. In this embodiment, the support ring 3 is a circular ring, and the axis of the support ring 3 coincides with the axis of the monitoring well; Figure 2 The upper side in the viewing angle is the upper side of this embodiment.

[0082] The limiting ring 4 is annular. In this embodiment, the limiting ring 4 is a circular ring, and the axis of the limiting ring 4 coincides with the axis of the supporting ring 3. The outer diameter of the limiting ring 4 is smaller than the inner diameter of the supporting ring 3, so the supporting ring 3 is sleeved on the limiting ring 4. A plurality of brackets 5 are welded to the outer wall of the limiting ring 4, and the brackets 5 are also welded to the inner wall of the supporting ring 3, so that the supporting ring 3, the limiting ring 4 and the brackets 5 are fixedly connected as a whole.

[0083] Multiple support wheel assemblies. In this embodiment, multiple support wheel assemblies are arranged on the support ring 3 in a circular array around the axis of the limit ring 4. The multiple support wheel assemblies are used to enable the above-mentioned whole to move along the axis of the monitoring well. For one support wheel assembly, the support wheel assembly includes:

[0084] The first sliding frame 6 is movably mounted on the support ring 3, and the first sliding frame 6 can slide relative to the support ring 3 along the radial direction of the support ring 3. In this embodiment, the first sliding frame 6 is in the shape of a rectangular frame, and its length direction is consistent with the sliding direction of the first sliding frame 6. The two ends of the length direction of the first sliding frame 6 are set to be end A and end B respectively, and the end A of the first sliding frame 6 is in the inner cavity of the support ring 3, and the end B is outside the ring of the support ring 3.

[0085] The first tension spring 7 has one end welded to the A end of the first sliding frame 6, and the other end welded to the inner ring surface of the support ring 3. In this embodiment, two first tension springs 7 are provided, and the two first tension springs 7 are respectively sleeved on the two frames corresponding to the first sliding frame 6, and the connection method of the two first tension springs 7 is the same.

[0086] The first rotating wheel 8 is rotatably connected to the B end of the first sliding frame 6 by means of a bearing; the plane where the axes of all the first rotating wheels 8 are located is assumed to be a plane P, and the axis of the supporting ring 3 is perpendicular to the plane P.

[0087] The second sliding frame 9 is movably mounted on the first sliding frame 6, and the second sliding frame 9 can move relative to the first sliding frame 6 along the length direction of the first sliding frame 6. The second sliding frame 9 is located outside the support ring 3. In this embodiment, the shape of the second sliding frame 9 is "L"-shaped when viewed from the axis of the first rotating wheel 8.

[0088] The second tension spring 10 has one end welded to the B end of the first sliding frame 6, and the other end welded to the upper end of the second sliding frame 9. The second rotating wheel 11 is rotatably connected to the second sliding frame 9 by means of a bearing, and the axis of the second rotating wheel 11 is parallel to the axis of the first rotating wheel 8. The second rotating wheel 11 is located below the first rotating wheel 8.

[0089] The sliding rod 12 is welded and fixed on the second sliding frame 9 .

[0090] When the first rotating wheel 8 and the second rotating wheel 11 are both in contact with the inner wall of the monitoring well, the first tension spring 7 and the second tension spring 10 are both stretched, and under the restoring force of the second tension spring 10, the slide bar 12 can move with the second sliding frame 9 as a whole along the length direction of the first sliding frame 6. The axis of the slide bar 12 is arranged parallel to the length direction of the first sliding frame 6, and a rubber is arranged at one end of the slide bar 12 facing the first rotating wheel 8. When the first rotating wheel 8 and the second rotating wheel 11 are both in contact with the inner wall of the monitoring well, the rubber on the slide bar 12 cannot contact the first rotating wheel 8; when the second rotating wheel 11 is separated from the inner wall of the monitoring well, because under the restoring force of the second tension spring 10, the slide bar 12, the rubber, the second sliding frame 9 and the second rotating wheel 11 can move as a whole in the direction away from the axis of the support ring 3, so finally, the rubber can contact the circumferential side wall of the first rotating wheel 8, and the rubber makes the first rotating wheel 8 produce a large friction resistance, limiting the rotation of the first rotating wheel 8.

[0091] See Figure 2 , sampling agencies include:

[0092] The guide ring 13 is inserted into the limiting ring 4. The guide ring 13 and the limiting ring 4 are not fixedly connected, and the guide ring 13 and the limiting ring 4 can be separated at will. In this embodiment, the guide ring 13 is a circular ring. When the guide ring 13 is inserted into the limiting ring 4, the outer wall of the guide ring 13 contacts the inner wall of the limiting ring 4, and the axes of the guide ring 13 and the limiting ring 4 coincide.

[0093] The connecting plate 14 is integrally provided with the guide ring 13 and is located below the limiting ring 4. The aforementioned supporting mechanism can be placed on the upper surface of the connecting plate 14 by its own gravity. When the supporting mechanism is placed on the connecting plate 14, the guide ring 13 can be inserted into the limiting ring 4 from the lower end of the limiting ring 4. The lower end of the aforementioned pull rope 2 is fixedly connected to the upper surface of the connecting plate 14. The pull rope 2 passes through the guide ring 13 and the limiting ring 4 from the upper end of the limiting ring 4 and is wound around the roller of the winch 1.

[0094] The mounting head 15 is integrally provided on the lower surface of the connecting plate 14 and is cylindrical. The axis of the mounting head 15 coincides with the axis of the limiting ring 4 .

[0095] Sampling box 16, see Figure 3 , rotatably connected to the mounting head 15, the sampling box 16 can rotate relative to the mounting head 15 around the axis of the mounting head 15. A quick-release structure is provided between the sampling box 16 and the mounting head 15, and the sampling box 16 can be removed from the mounting head 15 by the quick-release structure, while the quick-release structure does not affect the rotation of the sampling box 16 around the axis of the mounting head 15.

[0096] Sampling tube 17, see Figure 3 and Figure 4, relying on the base to be embedded in the bottom surface of the sampling box 16. Specifically, the base is welded and fixed to the bottom surface of the sampling box 16. The sampling tube 17 is in the shape of a round tube. A groove matching the shape of the sampling tube 17 is opened downward on the upper surface of the base. The sampling tube 17 is correspondingly embedded in the groove on the base, so that the sampling tube 17 and the sampling box 16 are connected as a whole. The axis of the sampling tube 17 is perpendicular to the axis of the mounting head 15, and the two ends of the sampling tube 17 face the two corresponding side walls of the sampling box 16 respectively.

[0097] Two openings 18 are respectively opened on the corresponding side walls of the sampling box 16. The openings 18 on both sides are respectively located on both sides of the sampling tube 17. After the openings 18 on both sides are opened, groundwater can flow into the sampling box 16 from one opening 18 and flow out of the sampling tube 17 through the other opening 18.

[0098] The first slide plate 19 and the second slide plate 20 are respectively movably mounted on the corresponding outer side walls of the sampling box 16, and the first slide plate 19 and the second slide plate 20 can slide relative to the corresponding outer side walls of the sampling box 16. In this embodiment, the movement direction of the first slide plate 19 and the second slide plate 20 is parallel to the axis of the mounting head 15, and the first slide plate 19 and the second slide plate 20 can open or close the corresponding opening 18 by moving at the same time. After the two openings 18 are closed, the water sample flowing into the sampling tube 17 cannot leak out of the sampling tube 17, thereby achieving the purpose of sampling.

[0099] The connecting frame 21 is located in the sampling box 16 and is fixed to the first slide plate 19 and the second slide plate 20 by welding.

[0100] Electric push rod 22, see Figure 4 The non-telescopic end is welded and fixed to the inner bottom wall of the sampling box 16, and the telescopic end of the electric push rod 22 is welded and fixed to the connecting frame 21. Under the action of the electric push rod 22, the connecting frame 21, the first slide 19 and the second slide 20 move as a whole in a direction parallel to the axis of the mounting head 15.

[0101] A water pressure sensor 23 is installed at the bottom of the outer side of the sampling box 16, and a control terminal 24 is installed inside the sampling box 16. The control terminal 24 is electrically connected to the water pressure sensor 23 and the aforementioned winch 1, and the water pressure data monitored by the water pressure sensor 23 can be transmitted to the control terminal 24; the control terminal 24 is communicatively connected to the control panel held by the operator, and the control terminal 24 is electrically connected to the electric push rod 22. The operator can send control instructions to the control terminal 24 through the control panel, and the pressure data received by the control terminal 24 can also be transmitted to the control panel for the operator to know the pressure data. Since the water depth is proportional to the pressure, the control terminal 24 can know the water depth of the water pressure sensor 23 based on the pressure data. In this embodiment, the water depth monitored by the water pressure sensor 23 is approximately regarded as the water depth of the sampling tube 17.

[0102] Wake plate 25, see Figure 3 , and is welded and fixed on the first slide plate 19. When installing the wake board 25, it is necessary to ensure that the axis of the installation head 15 is parallel to the surface of the wake board 25, and to ensure that the wake board 25 can contact the water body.

[0103] See Figure 4 , the quick-disassembly structure includes:

[0104] The quick-release seat 26 is integrally arranged on the upper surface of the sampling box 16 . A placement groove is downwardly opened on the upper surface of the quick-release seat 26 . The mounting head 15 is inserted into the placement groove from top to bottom, and the axis of the placement groove coincides with the axis of the mounting head 15 .

[0105] The first annular groove 27 is annular in shape. The axis of the first annular groove 27 coincides with the axis of the mounting head 15 . The first annular groove 27 is provided on the side wall of the mounting head 15 .

[0106] The quick release rod 28 is movably mounted on the quick release seat 26, and can slide relative to the quick release seat 26 along the radial direction of the mounting head 15. The quick release rod 28 is T-shaped, the top end of the T-shaped quick release rod 28 is located outside the quick release seat 26, and the tail end of the quick release rod 28 is arranged along the radial direction of the quick release seat 26 and penetrates into the quick release seat 26.

[0107] The clamping block 29 is located in the first annular groove 27 and is fixed to the tail end of the quick release rod 28 by welding.

[0108] The retraction groove 30 is provided in the quick release seat 26. When the quick release rod 28 is manually pulled, the whole composed of the quick release rod 28 and the clamping block 29 moves in a direction away from the axis of the mounting head 15, and the clamping block 29 can enter the retraction groove 30. After the clamping block 29 is retracted into the retraction groove 30, the mounting head 15 can be separated from the sampling box 16. On the contrary, when the clamping block 29 is in the first annular groove 27, the mounting head 15 and the sampling box 16 cannot be separated. However, at this time, the sampling box 16, the clamping block 29 and the quick release rod 28 can rotate as a whole relative to the mounting head 15 around the axis of the mounting head 15. In this process, the clamping block 29 moves in the first annular groove 27 around the axis of the mounting head 15.

[0109] The spring 31 is sleeved on the quick release rod 28, with one end abutting against the block 29 and the other end abutting against the inner wall of the retraction groove 30. After the sampling box 16 is connected and assembled with the mounting head 15 through the quick release structure, the spring 31 is in a compressed state. In the absence of external force, the restoring force of the spring 31 abuts the block 29 against the first annular groove 27.

[0110] The use process of this device is:

[0111] First, when placing the support mechanism and the sampling mechanism into the monitoring well, the operator manually pushes the first sliding frame 6 and the second sliding frame 9 of each support wheel assembly so that the first sliding frame 6 and the second sliding frame 9 are close to the axis of the support ring 3, thereby ensuring that the support mechanism and the sampling mechanism can be placed into the monitoring well. At this time, the first tension spring 7 and the second tension spring 10 are both in a stretched state; then, after the operator releases the first sliding frame 6 and the second sliding frame 9, under the restoring force of the first tension spring 7 and the second tension spring 10, the first rotating wheel 8 and the second rotating wheel 11 of each support wheel assembly are both against the inner wall of the upper edge of the monitoring well. The support mechanism is pressed on the connecting plate 14 by its own weight. At this time, the support mechanism and the sampling mechanism are pulled by the pull rope 2 as a whole.

[0112] Then, the operator sends a start command to the control terminal 24 through the control panel. After receiving the start command, the control terminal 24 controls the winch 1 to start. The winch 1 unwinds the pull rope 2. The height of the connecting plate 14 in the sampling mechanism continues to decrease along the monitoring well due to the unwinding of the pull rope 2. Because the supporting mechanism is placed on the sampling mechanism by gravity, the supporting mechanism decreases synchronously with the descent of the sampling mechanism due to its own gravity. During this process, the first sliding frame 6 and the second sliding frame 9 both roll along the inner wall of the monitoring well.

[0113] As the pull rope 2 is continuously unwound, when the second rotating wheel 11 of the supporting mechanism rolls down to the lower edge of the monitoring well, at this time, the second rotating wheel 11 just breaks away from the inner wall of the monitoring well, that is, the second rotating wheel 11 can no longer abut the inner wall of the monitoring well. At this time, the restoring force of the second tension spring 10 will cause the second sliding frame 9 and the sliding rod 12 to move as a whole away from the axis of the supporting ring 3, and finally cause the sliding rod 12 and the rubber to abut against the edge of the first rotating wheel 8 as a whole, so that the sliding rod 12 and the rubber as a whole restrict the first rotating wheel 8 from continuing to rotate, and a large friction force is generated between the first rotating wheel 8 and the inner wall of the monitoring well. At this time, the entire supporting mechanism no longer continues to roll down along the inner wall of the monitoring well.

[0114] As the operator continues to operate the winch 1 to unwind the rope 2, the sampling mechanism and the rope 2 continue to descend. Since the aforementioned support mechanism no longer descends, the sampling mechanism gradually separates from the support mechanism, that is, the guide ring 13 gradually separates from the lower end of the limit ring 4. After separation, the limit ring 4 in the middle of the support mechanism plays a role in limiting the rope 2 in the inner ring of the limit ring 4. The rope 2 and the sampling mechanism can only swing in a small range. When the rope 2 swings, the end point is also at the position of the limit ring 4. Compared with the original winch 1 as the end point when the rope 2 swings, the support mechanism is adopted to shorten the swing length of the rope 2 when the rope 2 swings, which is conducive to shortening the swing range and avoiding friction between the rope 2 and the edge of the monitoring well.

[0115] As the winch 1 continues to unwind the pull rope 2, the sampling mechanism gradually enters the groundwater. Due to the scouring of the groundwater flow and the presence of the wake plate 25, the sampling box 16 in the sampling mechanism rotates around the axis of the mounting head 15 relative to the mounting head 15 until the plane of the wake plate 25 is parallel to the groundwater flow direction and the wake plate 25 is on the downstream side of the groundwater flow. At this time, the sampling box 16 is in a relatively stable state and the sampling box 16 no longer continues to rotate around the axis of the mounting head 15 at a large angle relative to the mounting head 15. It is approximately regarded that the sampling box 16 no longer rotates around the axis of the mounting head 15.

[0116] Then, the water pressure sensor 23 monitors the groundwater pressure data and transmits it to the control terminal 24. The control terminal 24 calculates the corresponding water depth Hx based on the pressure data and compares it with the water depth Hy sent to the control terminal 24 by the operator through the control panel. If the two are equal, the control terminal 24 sends a stop command to the winch 1, and the winch 1 stops.

[0117] After the winch 1 stops, the operator sends a sampling start instruction to the control terminal 24 through the control panel. The control terminal 24 controls the electric push rod 22 to extend to its longest length according to the sampling start instruction. The electric push rod 22 moves the first slide 19 and the second slide 20 along the axis of the mounting head 15 through the connecting frame 21. The two openings 18 are opened at the same time, and groundwater flows through the sampling tube 17. After a period of time T, the operator sends a sampling completion signal to the control terminal 24 through the control panel. The control terminal 24 controls the electric push rod 22 to shorten to its shortest length according to the sampling completion signal. The electric push rod 22 moves the first slide 19 and the second slide 20 along the axis of the mounting head 15 through the connecting frame 21. The two openings 18 are closed by the first slide 19 and the second slide 20 at the same time, and the sampling tube 17 becomes a closed cavity. Water of a certain depth H is stored in the sampling tube 17.

[0118] The operator then sends a recovery command to the control terminal 24 through the control panel. The control terminal 24 controls the winch 1 to reverse according to the recovery command, and the pull rope 2 is wound up and the pull rope 2 pulls the sampling mechanism up.

[0119] The pull rope 2 is guided by the limiting ring 4, which causes the guide ring 13 to be reinserted into the limiting ring 4. After the guide ring 13 is inserted into the limiting ring 4, as the pull rope 2 continues to be wound, the sampling mechanism generates a thrust from the bottom to the top on the support mechanism, and finally the support mechanism moves up along the monitoring well under the thrust. After the support mechanism moves up, the thrust causes the second sliding frame 9 to overcome the resistance of the second tension spring 10 and move, and the second rotating wheel 11 retracts into the monitoring well, and the second rotating wheel 11 abuts against the inner wall of the monitoring well again.

[0120] In other embodiments, a triangular inclined plate is welded on the second sliding frame 9, and the inclined plate can prevent the second rotating wheel 11 from extending excessively out of the monitoring well, resulting in the second rotating wheel 11 being unable to retract into the monitoring well. The inclined plate can be used to get stuck on the inner wall of the monitoring well to prevent the second rotating wheel 11 from being unable to retract into the monitoring well. In this embodiment, an inclined plate is not designed, and it is only necessary to control the stretching length of the second tension spring 10 so that the second tension spring 10 cannot cause the second rotating wheel 11 to extend excessively out of the monitoring well, thereby preventing the second rotating wheel 11 from being unable to retract into the monitoring well.

[0121] After the second rotating wheel 11 abuts against the inner wall of the monitoring well again, the rubber and the slide bar 12 as a whole no longer abut against the first rotating wheel 8, and the first rotating wheel 8 can rotate freely again. The winch 1 continues to reel in the pull rope 2, and the winch 1 moves the supporting mechanism and the sampling mechanism as a whole out of the upper end of the monitoring well through the pull rope 2. After that, the operator sends a stop command to the control terminal 24 through the control panel, and the control panel controls the winch 1 to stop rotating according to the stop command.

[0122] Finally, the operator tilts the sampling mechanism and controls the electric push rod 22 to extend to its maximum length through the control panel in the above-mentioned manner, and the two openings 18 are opened at the same time, allowing the collected groundwater to flow out from the opening 18 at one end.

[0123] In this embodiment, because a support mechanism is designed, the pull rope 2 is always restricted in the limit ring 4 of the support mechanism when unwinding. The support mechanism supports the middle part of the pull rope 2 and avoids friction between the pull rope 2 and the inner wall of the monitoring well.

[0124] Moreover, the support mechanism can move along the monitoring well, and only when the support mechanism reaches the lowest end of the monitoring well will the support mechanism be separated from the sampling mechanism. The advantage of such a design is that the friction between the pull rope 2 and the lower edge of the monitoring well can be avoided. Therefore, the existence of the support mechanism better protects the pull rope 2 and avoids the pull rope 2 from being damaged and worn due to friction with the monitoring well.

[0125] Example 2: See Figure 5 and Figure 6 , a groundwater sampling device for hydrogeology, based on embodiment 1, further includes a drainage component, the drainage component includes:

[0126] The device shell 32 is in the shape of a hollow shell; the device shell 32 is welded to the upper end of the outer side of the sampling tube 17;

[0127] The movable plate 33 is located in the device housing 32 and can move relative to the device housing 32 along an axis parallel to the mounting head 15;

[0128] The connecting rod 34 is welded and fixed on the upper surface of the movable plate 33. The axis of the connecting rod 34 is parallel to the axis of the mounting head 15. A hole for the connecting rod 34 to pass through is opened on the equipment shell 32. The upper end of the connecting rod 34 passes through the equipment shell 32. The connecting rod 34 and the hole are not sealed. The connecting rod 34 and the movable plate 33 can move as a whole in a direction parallel to the axis of the mounting head 15.

[0129] The third tension spring 35 is sleeved on the connecting rod 34 and is in a stretched state. The lower end of the third tension spring 35 is fixedly connected to the upper portion of the movable plate 33, and the upper end of the third tension spring 35 is fixedly connected to the inner upper surface of the device shell 32.

[0130] The sleeve 36 is welded and fixed in the sampling box 16 , and the upper end of the connecting rod 34 is located in the sleeve 36 .

[0131] The piston plate 37 is fixed to the upper end of the connecting rod 34. The piston plate 37 is in the sleeve 36. The peripheral wall of the piston plate 37 and the inner wall of the sleeve 36 are sealed. The piston plate 37 is made of rubber.

[0132] One end of the connecting pipe 38 is connected to the top of the sleeve 36 cavity; the connecting pipe 38 is L-shaped along the axis of the connecting rod 34; the connecting pipe 38 and the cavity of the sleeve 36 located above the first piston plate 37 are filled with liquid, such as water.

[0133] The moving rod 39 has one end located in the other end of the connecting pipe 38 and the other end located outside the connecting pipe 38. The moving rod 39 can move relative to the connecting pipe 38 due to the squeezing of water in the connecting pipe 38. The moving direction of the moving rod 39 is along the radial direction of the connecting rod 34, and the moving rod 39 and the inner wall of the connecting pipe 38 are kept sealed.

[0134] The rack 40 is welded and fixed to one end of the moving rod 39 outside the connecting pipe 38 and can move together with the moving rod 39 as a whole;

[0135] The gear box 41 is installed in the sampling tube 17 via a connecting frame, which is welded to the outer wall of the gear box 41 and is also welded and fixed to the inner wall of the sampling tube 17, so that the gear box 41, the connecting frame and the sampling tube 17 form a whole.

[0136] The turbine 42 is installed on the output end of the gear box 41, and the axis of the turbine 42 coincides with the axis of the sampling tube 17; due to the gear transmission principle of the gear box 41, the resistance of the reverse drive is very large, and the turbine 42 cannot drive the drive shaft 43 described later to rotate by its own rotation, so the turbine 42 can only be driven to rotate by the drive shaft 43 described later.

[0137] The drive shaft 43 is welded and fixed to the input end of the gear box 41. The axis of the drive shaft 43 is arranged along the radial direction of the sampling tube 17. The upper end of the drive shaft 43 passes through the sampling tube 17. The drive shaft 43 is rotatably connected to the inner wall of the sampling box 16 through a bearing. The drive shaft 43 is also connected to the corresponding hole of the sampling tube 17 through a bearing.

[0138] The linkage gear 44 is sleeved and welded on the driving shaft 43 . The axis of the linkage gear 44 coincides with the axis of the driving shaft 43 . The linkage gear 44 meshes with the rack 40 .

[0139] See Figure 6 , and also includes a release mechanism, which can release the restoring force of the third tension spring 35, and the release mechanism includes:

[0140] A mounting frame 45 is welded and fixed to the inner upper surface of the sampling box 16;

[0141] The insertion hole 46 is provided on the circumferential side wall of the sleeve 36;

[0142] The insertion rod 47 is inserted into the insertion hole 46. Figure 5 , the insertion rod 47 can abut against the upper surface of the piston plate 37. When the insertion rod 47 abuts against the upper surface of the piston plate 37, the third tension spring 35 is in a stretched state, and the restoring force is not released at this time. The insertion rod 47 is movably mounted on the mounting frame 45 and can move along the mounting frame 45 along the radial direction of the mounting head 15;

[0143] The abutment plate 48 is welded and fixed on the insertion rod 47;

[0144] The fourth tension spring 49 has one end welded to the abutment plate 48 and the other end welded to the mounting frame 45 . When the fourth tension spring 49 is in a free state, the insertion rod 47 is inserted into the insertion hole 46 and abuts against the upper surface of the piston plate 37 .

[0145] A first stopper 51 is welded and fixed to an end of the insertion rod 47 away from the insertion hole 46;

[0146] The second stopper 50 is welded and fixed to the upper end of the connection frame 21. The second stopper 50 can contact the first stopper 51. The contact surfaces of the second stopper 50 and the first stopper 51 are both inclined surfaces. The upward movement of the second stopper 50 can force the first stopper 51 to move in the horizontal direction away from the sleeve 36.

[0147] The working process and reset of the release mechanism are as follows:

[0148] The electric push rod 22 is controlled to extend through the control panel, so that the connecting frame 21 and the second stop block 50 move up as a whole, so that the inclined surfaces of the second stop block 50 and the first stop block 51 are in contact. Due to the inclined surfaces of the two, the second stop block 50 will force the first stop block 51 to move away from the sleeve 36, that is, the insertion rod 47, the first stop block 51, and the abutment plate 48 move to the right as a whole. At this time, the fourth tension spring 49 is stretched.

[0149] The plug rod 47 is provided with two marks, which are marked as mark C and mark C' respectively; the mounting frame 45 is correspondingly provided with a first indicator mark. When the fourth tension spring 49 is in a free state, the plug rod 47 is inserted into the insertion hole 46 and abuts against the upper surface of the piston plate 37, that is, Figure 5 In the state, the first indicator mark on the mounting frame 45 points to the mark C.

[0150] When the rightward movement of the insertion rod 47 stretches the fourth tension spring 49, the first indicator mark points to the mark C'. At this time, the insertion rod 47 is separated from the upper surface of the piston plate 37. After the piston plate 37 loses the limit of the insertion rod 47, the piston plate 37 is forced to move upward under the action of the restoring force of the third tension spring 35. The piston plate 37 pushes the liquid in the cavity of the sleeve 36 into the connecting pipe 38, so that the moving rod 39 and the rack 40 move to the left as a whole under the pressure of the liquid in the cavity of the sleeve 36. Since the rack 40 and the linkage gear 44 are meshed, the moving rod 39 and the rack 40 drive the linkage gear 44 to rotate as a whole, and the linkage gear 44 and the drive shaft 43 rotate as a whole, and the drive shaft 43 drives the turbine 42 to rotate through the gear box 41. The rotation of the turbine 42 can create a pressure difference in the water on both sides of the sampling tube 17, thereby allowing the water to flow through the sampling tube 17 more quickly. This is more conducive to the water near the sampling tube 17 entering the sampling tube 17, so that the water collected in the sampling tube 17 is not only the water at the location of the sampling mechanism, but also the water near the sampling mechanism, so that the sampling is more comprehensive and representative.

[0151] The surface of the moving rod 39 is provided with a mark D, and the connecting pipe 38 is also provided with a second indicator mark correspondingly. When the moving rod 39 does not move to the left, that is, Figure 5 When in the state, the second indicator mark on the connecting pipe 38 points to the mark D; after the third tension spring 35 recovers from the stretched state to the natural state, the moving rod 39 and the rack 40 move to the left as a whole, and the second indicator mark no longer points to the mark D.

[0152] After the sampling is completed, the electric push rod 22 is controlled to retract, and the openings at both ends of the sampling tube 17 are closed. During the process of the piston rod of the electric push rod 22 retracting, the piston rod of the electric push rod 22 causes the connecting frame 21 and the second stop block 50 to move downward as a whole. After the second stop block 50 is no longer in contact with the first stop block 51, the fourth tension spring 49 is restored from the stretched state to the natural state, and the first indicator mark points to the mark C again; however, at this time, the insertion rod 47 is not in contact with the upper surface of the piston plate 37, but the insertion rod 47 is located below the piston plate 37. Therefore, it is necessary to manually restore the piston plate 37 and the insertion rod 47 to Figure 5 The state is set so that the rod 47 abuts against the upper surface of the piston plate 37 again to ensure that the next sampling can proceed normally. The specific operation is as follows:

[0153] First, the operator pulls the insertion rod 47 to the right so that the first needle points to the mark C′ on the insertion rod 47 , that is, the fourth tension spring 49 is stretched. At this time, the insertion rod 47 will not interfere with the movement of the piston plate 37 .

[0154] Then, the operator pushes the rack 40 to the right while keeping the first indicator mark pointing to the mark C', so that the mark D on the moving rod 39 moves, until the second indicator mark points to the mark D, indicating that the piston plate 37 is completely reset, that is, the upper surface of the piston plate 37 is located below the insertion hole 46. During the reset of the piston plate 37, the liquid in the cavity of the connecting pipe 38 re-enters the cavity of the sleeve 36, and the liquid in the cavity of the sleeve 36 forces the piston plate 37 to move downward, and the third tension spring 35 is gradually stretched from the natural state.

[0155] Then, after the piston plate 37 is reset, the operator releases the rod 47, and the fourth tension spring 49 is restored from the stretched state to the natural state under the action of the restoring force, and the left end of the rod 47 passes through the insertion hole 46 again to abut against the upper surface of the piston plate 37, and the first indicator mark points to the mark C; finally, the operator can release the rack 40. In order to meet the above-mentioned operating requirements, two reset windows are provided on the sampling box 16 for the hands to reach into the cavity of the sampling box 16. During normal sampling, the reset windows are closed with blind plates.

[0156] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A groundwater sampling device for hydrogeology, comprising a winch and a pull rope wound on a drum of the winch, characterized in that: It also includes a supporting mechanism and a sampling mechanism; Supporting organizations include: A support ring, a limiting ring, a bracket and a plurality of support wheel assemblies, wherein the support ring is sleeved on the limiting ring, and the support ring and the limiting ring are connected as a whole through the bracket; the axis of the limiting ring is parallel to the axis of the monitoring well; The support wheel assembly includes: The first sliding frame is movably mounted on the support ring, and the first sliding frame can move relative to the support ring along the radial direction of the limit ring; the length direction of the first sliding frame is consistent with the sliding direction of the first sliding frame; one end of the length direction of the first sliding frame is set as end A, and the other end is set as end B, end A is in the inner cavity of the support ring, and end B is outside the ring of the support ring; A first tension spring, one end of which is fixedly connected to the A end of the first sliding frame, and the other end of which is fixedly connected to the support ring; The first rotating wheel is rotatably connected to the B end of the first sliding frame; the plane where the axes of all the first rotating wheels are located is assumed to be a plane P, and the axis of the limiting ring is perpendicular to the plane P; the first tension spring enables the first sliding frame and the first rotating wheel to contact the inner wall of the monitoring well as a whole; A second sliding frame is movably mounted on the first sliding frame, the second sliding frame can move relative to the first sliding frame along the length direction of the first sliding frame, and the second sliding frame is located on the outer ring of the support ring; A second tension spring, one end of which is fixedly connected to the B end of the first sliding frame, and the other end of which is fixedly connected to the second sliding frame; The second rotating wheel is rotatably connected to the second sliding frame, the rotating shaft axis of the second rotating wheel is parallel to the rotating shaft axis of the first rotating wheel, and the second rotating wheel is located below the first rotating wheel; the second tension spring can make the second sliding frame and the second rotating wheel group contact with the inner wall of the monitoring well as a whole; A slide bar is fixedly connected to the second sliding frame; when the second rotating wheel is separated from the monitoring well, the restoring force of the second tension spring can make the slide bar, the second rotating wheel and the second sliding frame move as a whole, and the slide bar can contact the surface of the first rotating wheel and limit the rotation of the first rotating wheel; The sampling mechanism is connected to the lower end of the pull rope; the pull rope passes through the limit ring, and the supporting mechanism is placed on the sampling mechanism by gravity.

2. A groundwater sampling device for hydrogeology according to claim 1, characterized in that: The sampling mechanism comprises: The connecting plate is located below the limiting ring; the pull rope is fixed on the connecting plate and passes through the limiting ring; A mounting head, integrally arranged on the lower surface of the connecting plate; A sampling box, connected to the mounting head; Two openings are respectively arranged on the corresponding side walls of the sampling box; A sampling tube is fixedly connected in the sampling box, with two ends of the sampling tube facing two openings respectively; The first slide plate and the second slide plate are movably mounted on the corresponding outer side walls of the sampling box, and the first slide plate and the second slide plate can simultaneously open or close the corresponding two openings by sliding; A connecting frame is located in the sampling box and is fixedly connected to the first slide plate and the second slide plate; The electric push rod is used to move the connecting frame, the first slide plate and the second slide plate as a whole.

3. A groundwater sampling device for hydrogeology according to claim 2, characterized in that: The mounting head and the sampling box are connected via a quick-release structure, which includes: The quick-release seat is integrally arranged on the upper surface of the sampling box; a placement groove is downwardly opened on the upper surface of the quick-release seat, and the mounting head can be inserted into the placement groove; A first annular groove is provided on a side wall of the mounting head along the axis of the mounting head, and the axis of the first annular groove coincides with the axis of the mounting head; A quick release rod is movably mounted on the quick release seat, and the moving direction of the quick release rod is along the radial direction of the mounting head; The clamping block is located in the first annular groove and is fixedly connected to one end of the quick release rod facing the mounting head; The retraction groove is provided on the quick release seat, and the quick release rod and the clamping block are moved in a direction away from the axis of the mounting head so that the clamping block can enter the retraction groove; The spring is sleeved on the quick-release rod, one end of which abuts against the clamping block, and the other end abuts against the inner wall of the retraction groove; under the restoring force of the spring, the clamping block can be located in the first annular groove.

4. A groundwater sampling device for hydrogeology according to claim 3, characterized in that: The first slide plate is fixedly connected with a wake board, the axis of the mounting head is parallel to the surface of the wake board, and the wake board can contact the water body.

5. A groundwater sampling device for hydrogeology according to claim 2, characterized in that: The sampling mechanism also includes a water pressure sensor, which is installed on the outer bottom of the sampling box; a control terminal is provided in the sampling box, and the water pressure sensor and the electric push rod are electrically connected to the control terminal; the operator can send operating instructions to the control terminal through the control panel.

6. A groundwater sampling device for hydrogeology according to claim 2, characterized in that: The sampling mechanism further includes a drainage component, which includes: The equipment shell is fixedly connected to the upper end of the sampling box; A mobile board, located in the device housing; A connecting rod is fixedly connected to the upper surface of the moving plate, the axis of the connecting rod is parallel to the axis of the mounting head, the upper end of the connecting rod passes through the equipment shell, and a hole for the connecting rod to pass through is opened on the equipment shell, and the connecting rod and the hole are not sealed; A third tension spring is sleeved on the connecting rod, the upper end of the third tension spring is fixedly connected to the inner upper end of the device shell, and the lower end is fixedly connected to the upper surface of the moving plate; a sleeve is fixedly connected to the sampling box, and the upper end of the connecting rod is in the sleeve; The piston plate is fixedly connected to the upper end of the connecting rod, and the piston plate and the inner wall of the sleeve are kept sealed; A connecting pipe, one end of which is connected to the sleeve and the other end of which is outside the sleeve; the connecting pipe and the sleeve are both filled with liquid in the cavity above the piston plate; The moving rod is located at the side of the connecting pipe away from the sleeve. The moving rod can move relative to the connecting pipe due to the squeezing of water in the connecting pipe. One end of the moving rod is located in the connecting pipe, and the other end is located outside the connecting pipe. A rack, fixedly connected to the moving rod; The gear box is fixedly connected to the sampling tube through a connecting frame; A turbine, fixedly connected to the output end of the gearbox; A drive shaft, fixedly connected to the input end of the gear box; The linkage gear is sleeved and fixedly connected to the driving shaft and meshes with the rack; The utility model also comprises a release component for releasing the restoring force of the third tension spring.

7. A groundwater sampling device for hydrogeology according to claim 6, characterized in that: The release assembly comprises: A mounting bracket, fixedly connected to the inner surface of the sampling box; A socket is provided on the circumferential side wall of the sleeve; An insertion rod is inserted into the insertion hole, the insertion rod abuts against the upper surface of the piston plate, and the insertion rod can move relative to the insertion hole and be separated from the piston plate; An abutment plate, fixedly connected to the insertion rod; A fourth tension spring, one end of which is fixedly connected to the abutment plate, and the other end of which is fixedly connected to the mounting frame. When the fourth tension spring is in a free state, one end of the insertion rod passes through the insertion hole and abuts against the upper surface of the piston plate. A first stop block is fixedly connected to an end of the insertion rod away from the insertion hole; The second stop block is fixedly connected to the upper end of the connection frame. Under the action of the electric push rod, the second stop block can contact the first stop block, and the second stop block can make the first stop block move in a direction away from the sleeve.

8. A groundwater sampling device for hydrogeology according to claim 2, characterized in that: A guide ring is fixedly connected to the upper surface of the installation head. The guide ring is sleeved on the pull rope and penetrated into the limiting ring.

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