Sampling equipment for underground water detection

Abstract

The invention discloses sampling equipment for underground water detection, and belongs to the technical field of underground water detection. The device comprises a support, a motor is fixedly connected to the upper side of the support, a rotating roller is fixedly connected to the output end of the motor, a rope is connected to the outer side of the rotating roller in a wound mode, the end of the rope penetrates through the support, a sampling barrel is fixedly connected to the end of the rope, and a fixing ring is fixedly connected to the interior of the sampling barrel. The upper side of the fixing ring is fixedly connected with an isolating ring, the outer side of the isolating ring is uniformly and fixedly connected with a plurality of groups of isolating plates, and the plurality of groups of isolating plates are fixedly connected with the fixing ring and the sampling barrel. In the sampling process, the driving plate and the driven plate are driven to move through the electric push rod, so that differential speed occurs between the driving plate and the driven plate, a corresponding space is formed, the space is used for sampling operation, mutual influence between sampling every time is small, and the sampling effect is good.

Description

Technical Field

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

[0002] Groundwater refers to various forms of gravity water buried below the surface. In the process of groundwater detection, it is necessary to first sample the groundwater. The traditional sampling method is to first put the sampling bucket into the groundwater and then perform the corresponding sampling operation. The overall operation is simple. However, in the actual sampling process, the traditional sampling method requires repeated movement of the sampling bucket to complete multiple sampling operations when sampling groundwater at different locations, and each sampling can only take groundwater from one location, resulting in low sampling efficiency. In the actual sampling process, the sampling bucket is not in a closed state, and is easily affected by other water layers during the sampling process, thereby reducing the sampling effect. Therefore, a sampling device for groundwater detection is provided. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a sampling device for groundwater detection.

[0004] The present invention adopts the following technical solutions: A sampling device for groundwater detection comprises a bracket, wherein a motor is fixedly connected to the upper side of the bracket, a rotating roller is fixedly connected to the output end of the motor, a rope is wound around the outer side of the rotating roller, the end of the rope passes through the bracket, a sampling bucket is fixedly connected to the end of the rope, a fixing ring is fixedly connected to the inside of the sampling bucket, an isolation ring is fixedly connected to the upper side of the fixing ring, a plurality of isolation plates are evenly fixedly connected to the outside of the isolation ring, the plurality of isolation plates are fixedly connected to the fixing ring and the sampling bucket, an electric push rod is fixedly connected to the inside of the sampling bucket, an active plate is fixedly connected to the output end of the electric push rod, a fixing rod is fixedly connected to the lower side of the active plate, The outer side of the fixed rod is slidably sleeved with a driven plate, and a differential assembly for controlling the movement of the active plate and the driven plate is installed in the sampling barrel. The differential assembly includes a positioning rod fixedly installed on the upper side of the fixed ring, and the outer side of the positioning rod is rotatably sleeved with a rotating cylinder, and the outer side of the rotating cylinder is fixedly sleeved with a first gear, the upper side of the active plate is fixedly connected with a first rack, and the first rack is meshed with the first gear, and the upper side of the driven plate is fixedly connected with a connecting rod, and the connecting rod passes through the active plate and is slidably connected to the active plate, and the side wall of the connecting rod is fixedly connected with a second rack, and the outer side of the rotating cylinder is also fixedly sleeved with a second gear, and the second gear is meshed with the second rack.

[0005] Preferably, the sampling barrel has a plurality of water inlet holes on its side wall, a control assembly for controlling the water inlet hole switch is installed in the sampling barrel, the control assembly comprises a plurality of conical cavities opened in the sampling barrel, the plurality of conical cavities are communicated with the water inlet holes, a plurality of cavities are opened in the fixing ring, the plurality of cavities and the water inlet holes are arranged opposite to each other, a fixing box is fixedly connected between the plurality of cavities and the conical cavities, a first spring is fixedly connected to the upper side of the fixing box, and a baffle is fixedly connected to the upper side of the first spring.

[0006] Preferably, a threaded ring is rotatably connected inside the fixed box, a connecting wire is wound around the outside of the threaded ring, the connecting wire passes through the side wall of the fixed box, the connecting wire is fixedly connected to the baffle, a threaded rod is threadedly sleeved inside the threaded ring, the threaded rod passes through the fixed box and is slidably connected to the fixed box, a rotating block is rotatably connected to the lower side of the threaded rod, a second spring is rotatably connected to the upper side of the rotating block, the second spring is fixedly connected to the fixed ring, a plurality of groups of fixed cylinders are circumferentially fixedly connected to the lower side of the fixed ring, a plurality of groups of fixed cylinders are provided with threaded grooves on the inner sides, a clamping rod is slidably connected in the threaded groove, and the clamping rod is fixedly connected to the rotating block.

[0007] Preferably, a square tube is fixedly connected to the outer side of the rotating block, a rotating plate is slidably sleeved inside the square tube, and a third spring is fixedly connected between the rotating plate and the square tube.

[0008] Preferably, a rotating ring is rotatably connected to the upper side of the active plate, a plurality of groups of gear levers are evenly and fixedly connected to the outer side of the rotating ring, an arc plate is fixedly connected to the outer side of the rotating ring, and the arc plate is located at the lower side of the rotating block.

[0009] Preferably, a plurality of groups of rubber rods are evenly and fixedly connected to the inner side of the active plate, and the plurality of groups of rubber rods are located on the inner side of the rotating ring and abut against the rotating ring.

[0010] Preferably, a sliding groove is formed on a side wall of the threaded rod, a sliding block is slidably connected in the sliding groove, and the sliding block is fixedly connected to the cavity.

[0011] Preferably, a plurality of groups of openings are formed on the upper side of the sampling barrel, and threaded blocks are screwed into the plurality of groups of openings.

[0012] The beneficial effects of the present invention are: 1. First, during the sampling process, the electric push rod drives the active plate and the driven plate to move, so that a differential speed appears between the active plate and the driven plate, forming a corresponding space, and the sampling operation is performed using this space. The mutual influence between each sampling is small, and the sampling effect is good; 2. In addition, during the sampling process, the sampled water between the active plate and the driven plate is automatically transported to other locations to complete a simple storage operation of the sampled water, thereby enabling multiple sampling operations; 3. Finally, in the process of sampling, not only will each sampling not affect each other, but multiple sampling can be carried out, and the sampled water can be stored separately, and the sampling effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a sampling device for groundwater detection proposed by the present invention; Figure 2 This is a schematic diagram of the internal structure of a sampling barrel in a sampling device for groundwater detection proposed by the present invention; Figure 3 This is a top view and cross-sectional connection diagram of a sampling barrel in a sampling device for groundwater detection proposed by the present invention; Figure 4 This is a schematic structural diagram of a differential assembly in a sampling device for groundwater detection proposed by the present invention; Figure 5 This is a schematic diagram of the connection between the water inlet hole and the fixing ring in a sampling device for groundwater detection proposed by the present invention; Figure 6 This is a cross-sectional connection diagram of a conical cavity in a groundwater detection sampling device proposed by the present invention; Figure 7 A cross-sectional connection diagram of a conical cavity and a water inlet hole in a sampling device for groundwater detection proposed by the present invention; Figure 8 for Figure 7 A magnified view of the structure at center A; Fig. 9 It is a partial cross-sectional connection diagram of a rotating block and a rotating cylinder in a sampling device for groundwater detection proposed by the present invention; Fig.10 This is a top view connection diagram of a rotating ring in a sampling device for groundwater detection proposed by the present invention.

[0014] In the figure: 1 bracket, 2 motor, 3 rotating roller, 4 rope, 5 sampling barrel, 6 fixed ring, 7 isolation ring, 8 isolation plate, 9 electric push rod, 10 active ring, 11 fixed rod, 12 driven ring, 13 rotating ring, 14 fixed rod, 15 rotating cylinder, 16 first gear, 17 second gear, 18 connecting rod, 19 second rack, 20 first rack, 21 water inlet hole, 22 fixed cylinder, 23 square cylinder, 24 rotating plate, 25 conical cavity, 26 baffle, 27 first spring, 28 fixed box, 29 cavity, 30 threaded ring, 31 threaded rod, 32 rotating block, 33 second spring, 34 connecting line, 35 slider, 36 clamping rod, 37 threaded groove, 38 rubber rod, 39 gear lever, 40 slide groove, 41 arc plate, 42 third spring. DETAILED DESCRIPTION

[0015] See also Figure 1-Figure 10 A sampling device for groundwater detection includes a bracket 1, a motor 2 is fixedly connected to the upper side of the bracket 1, a rotating roller 3 is fixedly connected to the output end of the motor 2, a rope 4 is wound around the outer side of the rotating roller 3, the end of the rope 4 passes through the bracket 1, and a sampling bucket 5 is fixedly connected to the end of the rope 4, and the opening of the sampling bucket 5 is downward; When sampling operation is required, the sampling bucket 5 is first placed on the upper side of the sampling point, and the motor 2 is started. The motor 2 drives the rotating roller 3 to rotate, so that the rope 4 is wound around the rotating roller 3, and then the sampling bucket 5 moves downward under the action of its own gravity until the sampling bucket 5 is located at a suitable sampling position, and then the corresponding sampling operation is started. The above are all existing technologies and no redundant description is given; like Figure 2 , Figure 3 A fixing ring 6 is fixedly connected inside the sampling barrel 5, an isolating ring 7 is fixedly connected to the upper side of the fixing ring 6, and multiple groups of isolating plates 8 are evenly fixedly connected to the outer side of the isolating ring 7. The multiple groups of isolating plates 8 are fixedly connected to the fixing ring 6 and the sampling barrel 5. An electric push rod 9 is fixedly connected inside the sampling barrel 5, and an active plate 10 is fixedly connected to the output end of the electric push rod 9. A fixing rod 11 is fixedly connected to the lower side of the active plate 10, and a driven plate 12 is slidably sleeved on the outer side of the fixing rod 11. Multiple groups of openings are opened on the upper side of the sampling barrel 5, and threaded blocks are screwed into the multiple groups of openings; First, under the action of the sampling barrel 5, the isolation ring 7, the isolation plate 8 and the fixing ring 6, the interior of the sampling barrel 5 is divided into multiple groups of closed spaces, and the opening is located on the upper side of the closed space. When the sampling operation is performed, the sampled water is moved into the closed space and sealed and stored. Then, the sampling barrel 5 is taken out from the sampling point, the threaded block is screwed out from the opening, and the sampled water inside the closed space is taken out. like Figure 4 A differential assembly for controlling the movement of the active plate 10 and the driven plate 12 is installed in the sampling barrel 5, and the differential assembly includes a positioning rod 14 fixedly installed on the upper side of the fixed ring 6, and a rotating cylinder 15 is rotatably sleeved on the outer side of the positioning rod 14, and a first gear 16 is fixedly sleeved on the outer side of the rotating cylinder 15, and a first rack 20 is fixedly connected to the upper side of the active plate 10, and the first rack 20 and the first gear 16 are meshed, and a connecting rod 18 is fixedly connected to the upper side of the driven plate 12, and the connecting rod 18 runs through the active plate 10 and is slidably connected to the active plate 10, and a second rack 19 is fixedly connected to the side wall of the connecting rod 18, and a second gear 17 is also fixedly sleeved on the outer side of the rotating cylinder 15, and the second gear 17 is meshed with the second rack 19; First, when sampling operation is required, the electric push rod 9 is started, the electric push rod 9 drives the active plate 10 to move downward, the active plate 10 drives the first rack 20 to move downward, the first rack 20 drives the first gear 16 to rotate counterclockwise, the first gear 16 drives the rotating cylinder 15 and the second gear 17 to rotate counterclockwise, the second gear 17 drives the second rack 19 to move downward, and the second rack 19 drives the driven plate 12 to move downward. In this process, since the angular velocities of the first gear 16 and the second gear 17 are the same, but the diameter of the first gear 16 is smaller than the diameter of the second gear 17, the linear velocity of the first gear 16 is smaller than the linear velocity of the second gear 17, which causes the second rack 19 to decrease in speed. The degree is greater than the downward movement of the first rack 20, so that during the downward movement of the active plate 10 and the driven plate 12, the distance between the active plate 10 and the driven plate 12 gradually increases. When the driven plate 12 is moved out of the sampling barrel 5, the sampled water in the sampling point enters the sampling barrel 5, and then the electric push rod 9 is started again, the electric push rod 9 drives the active plate 10 to move upward, the active plate 10 drives the first rack 20 to move upward, the active plate 10 and the driven plate 12 repeat the above-mentioned opposite movements, the driven plate 12 enters the sampling barrel 5, and the distance between the active plate 10 and the driven plate 12 becomes smaller, the sampled water is located between the sampling barrel 5, the active plate 10 and the driven plate 12, and the sampling operation is completed.

[0016] like Figure 5 , Figure 6 The sampling barrel 5 has a plurality of water inlet holes 21 on its side wall, and a control assembly for controlling the water inlet holes 21 is installed in the sampling barrel 5. The control assembly includes a plurality of conical cavities 25 opened in the sampling barrel 5, and the plurality of conical cavities 25 are connected to the water inlet holes 21. The fixing ring 6 has a plurality of cavities 29, and the plurality of cavities 29 and the water inlet holes 21 are arranged one by one. A fixing box 28 is fixedly connected between the plurality of cavities 29 and the conical cavities 25, and a first spring 27 is fixedly connected to the upper side of the fixing box 28, and a baffle 26 is fixedly connected to the upper side of the first spring 27; First, without the influence of other parts, the baffle 26 and the side wall of the conical cavity 25 are against each other, the water inlet 21 is in a closed state, and the enclosed space and the space formed by the active plate 10 and the driven plate 12 are not connected. In the process of the active plate 10 and the driven plate 12 continuing to move upward, when the active plate 10 passes over the sampling hole on the lower side and when the baffle 26 and the side wall of the conical cavity 25 are disconnected, the water inlet 21 is in an open state, the enclosed space and the space formed by the active plate 10 and the driven plate 12 are connected, and the sampled water between the active plate 10 and the driven plate 12 enters the sealed space through the water inlet 21, thereby completing the short-term storage operation of the sampled water.

[0017] like Figure 7 , Figure 8 , Fig. 9 , Fig.10A threaded ring 30 is rotatably connected in the fixed box 28, and a connecting wire 34 is wound around the outer side of the threaded ring 30. The connecting wire 34 runs through the side wall of the fixed box 28, and the connecting wire 34 is fixedly connected to the baffle 26. A threaded rod 31 is threadedly sleeved in the threaded ring 30, and the threaded rod 31 runs through the fixed box 28 and is slidably connected to the fixed box 28. A rotating block 32 is rotatably connected to the lower side of the threaded rod 31, and a second spring 33 is rotatably connected to the upper side of the rotating block 32. The second spring 33 is fixedly connected to the fixed ring 6. A plurality of fixed cylinders 22 are circumferentially fixedly connected to the lower side of the fixed ring 6. The inner sides of the plurality of fixed cylinders 22 are provided with threaded grooves 37. The threaded grooves 3 7 is slidably connected with a clamping rod 36, the clamping rod 36 and the rotating block 32 are fixedly connected, the outer side of the rotating block 32 is fixedly connected with a square tube 23, the rotating plate 24 is slidably sleeved in the square tube 23, and a third spring 42 is fixedly connected between the rotating plate 24 and the square tube 23. The upper side of the active plate 10 is rotatably connected with a rotating ring 13, and the outer side of the rotating ring 13 is evenly fixedly connected with multiple groups of gear rods 39. The outer side of the rotating ring 13 is fixedly connected with an arc plate 41, and the arc plate 41 is located at the lower side of the rotating block 32. The side wall of the threaded rod 31 is provided with a sliding groove 40, and the sliding groove 40 is slidably connected with a slider 35, and the slider 35 is fixedly connected to the cavity 29; When the active plate 10 moves upward, the active plate 10 drives the rotating ring 13 and the arc plate 41 to move upward, the arc plate 41 and the rotating block 32 abut against each other and drive the rotating block 32 to move upward, and the rotating block 32 compresses the second spring 33 while driving the threaded rod 31 to move upward. Since the threaded rod 31 and the threaded ring 30 are threadedly connected, the threaded rod 31 drives the threaded ring 30 to rotate, so that the connecting line 34 is wound around the threaded ring 30, and the connecting line 34 drives the baffle plate 26 to move downward, and the baffle plate 26 compresses the first spring 27, and the connection between the baffle plate 26 and the tapered cavity 25 is disconnected, thereby causing the water inlet 21 to be opened, and in the process of the rotating block 32 moving upward, under the restriction of the thread groove 37 and the clamping rod 36, the rotating block 32 will also rotate clockwise, and the rotating block 32 drives the square tube 23 to rotate clockwise, and the square tube 23 drives the rotating plate 24 to rotate clockwise through the third spring 42. The shift rod 39 on the outside of the rotating ring 13 abuts against the shift rod 39 and drives the shift rod 39 and the rotating ring 13 to rotate, and the rotating ring 13 drives the arc plate 41 to rotate until the arc plate 41 and the rotating block 32 are disconnected. At this time, under the action of the second spring 33 and the first spring 27, the rotating block 32 and the baffle plate 26 return to their original positions as a whole, and the water inlet 21 is closed, which results in only one water inlet 21 being opened each time the active plate 10 moves upward, that is, only one enclosed space is opened, thereby completing the sampling operation. After the sampling operation is completed again, the sampling barrel 5 can be moved downward again until the position of the sampling barrel 5 meets the working needs, and then the sampling operation can be performed again. In addition, the thread lead angles of the threads on the outside of the threaded ring 30 and the threads on the outside of the thread groove 37 are both greater than the equivalent friction angle, that is, the threaded ring 30 and the threaded rod 31, the thread groove 37 and the clamping rod 36 will not self-lock.

[0018] Multiple groups of rubber rods 38 are evenly fixedly connected to the inner side of the active plate 10 . The multiple groups of rubber rods 38 are located on the inner side of the rotating ring 13 and abut against the rotating ring 13 . When the rotating plate 24 is not affected by external force, the rotating plate 24 is in a fixed state under the friction force of the rubber rods 38 .

[0019] In the present invention, when sampling operation is required, the sampling bucket 5 is first placed on the upper side of the sampling point, and the motor 2 is started. The motor 2 drives the rotating roller 3 to rotate, so that the rope 4 is wound around the rotating roller 3, and then the sampling bucket 5 moves downward under the action of its own gravity until the sampling bucket 5 is located at a suitable sampling position, and the electric push rod 9 is started. The electric push rod 9 drives the active plate 10 to move downward, and the active plate 10 drives the first rack 20 to move downward. The first rack 20 drives the first gear 16 to rotate counterclockwise, and the first gear 16 drives the rotating cylinder 15 and the second gear 17 to rotate counterclockwise, and the second gear 17 drives the second rack 19 to move downward, and the second rack 19 drives the driven plate 12 to move downward. In this process, due to the first gear 16 and the second gear 17 have the same angular velocity, but the diameter of the first gear 16 is smaller than the diameter of the second gear 17, so the linear velocity of the first gear 16 is smaller than the linear velocity of the second gear 17, which in turn causes the second rack 19 to descend faster than the first rack 20 to move downward, so that during the downward movement of the active plate 10 and the driven plate 12, the distance between the active plate 10 and the driven plate 12 gradually increases, and when the driven plate 12 moves out of the sampling barrel 5, the sampled water in the sampling point enters the sampling barrel 5, and then the electric push rod 9 is started again, the electric push rod 9 drives the active plate 10 to move upward, the active plate 10 drives the first rack 20 to move upward, the active plate 10 and the driven plate 12 repeat the above-mentioned opposite movements, the driven plate 12 enters the sampling barrel 5, and the active plate 10 and the driven plate 12 repeat the above-mentioned opposite movements, the driven plate 12 enters the sampling barrel 5, and the active plate 10 and the driven plate 12 repeat the above-mentioned opposite movements. The spacing between the plate 10 and the driven plate 12 becomes smaller, and the sampled water is located between the sampling barrel 5, the active plate 10 and the driven plate 12. During the upward movement of the active plate 10, the active plate 10 drives the rotating ring 13 and the arc plate 41 to move upward, and the arc plate 41 and the rotating block 32 abut against each other and drive the rotating plate 24 to move upward. The rotating block 32 compresses the second spring 33 and drives the threaded rod 31 to move upward. Since the threaded rod 31 and the threaded ring 30 are threadedly connected, the threaded rod 31 drives the threaded ring 30 to rotate, so that the connecting line 34 is wound around the threaded ring 30, and the connecting line 34 drives the baffle 26 to move downward, and the baffle 26 compresses the first spring 27, and the connection between the baffle 26 and the conical cavity 25 is disconnected, thereby causing the water inlet 21 to be opened, and during the rotation During the upward movement of the movable block 32, under the limiting action of the thread groove 37 and the clamping rod 36, the rotating block 32 will also rotate clockwise, and the rotating block 32 drives the rotating cylinder 15 to rotate clockwise, and the rotating cylinder 15 drives the rotating plate 24 to rotate clockwise through the third spring 42, and the rotating plate 24 and the shift rod 39 on the outer side of the rotating ring 13 abut against each other and drive the shift rod 39 and the rotating ring 13 to rotate, and the rotating ring 13 drives the arc plate 41 to rotate until the connection between the arc plate 41 and the rotating block 32 is disconnected. At this time, under the action of the second spring 33 and the first spring 27, the rotating block 32 and the baffle plate 26 return to their original positions as a whole, and the water inlet hole 21 is closed, resulting in only one water inlet hole 21 being opened each time the active plate 10 moves upward.That is, only one enclosed space is opened, thereby completing the sampling operation, and the curvature of the arc plate 41 is consistent with the curvature formed by the center of the circle of the two adjacent fixed cylinders 23 and the center of the rotating ring 13, that is, after the arc plate 41 is disconnected from the rotating block 32, it will be located at the lower side of the adjacent rotating block 32, (wherein the side wall of the arc plate 41 is slidably connected with the arc block through the telescopic spring, when the arc plate 41 is disconnected from the rotating block 32, the arc block and the adjacent rotating block 32 are abutted, and after the arc plate 41 moves downward again following the rotating ring 13, when When the arc block moves to a point where it does not abut against the side wall of the rotating block 32, the arc block moves to the lower side of the rotating block 32 under the action of the telescopic spring, and then after the rotating ring 13 moves upward, the arc plate 41 drives the rotating block 32 to move upward through the arc block), and then each time the electric push rod 9 is started, the sampled water will enter different closed spaces in turn, and multiple sampling operations can be completed. After the sampling operation is completed, the sampling barrel 5 is taken out from the sampling point, the threaded block is screwed out from the opening, and the sampled water inside the closed space can be taken out.

Claims

1. A sampling device for groundwater detection, comprising a bracket (1), a motor (2) fixedly connected to the upper side of the bracket (1), a rotating roller (3) fixedly connected to the output end of the motor (2), a rope (4) wound around the outer side of the rotating roller (3), an end of the rope (4) passing through the bracket (1), and a sampling bucket (5) fixedly connected to the end of the rope (4), characterized in that: A fixing ring (6) is fixedly connected inside the sampling barrel (5), an isolation ring (7) is fixedly connected to the upper side of the fixing ring (6), a plurality of isolation plates (8) are evenly fixedly connected to the outer side of the isolation ring (7), the plurality of isolation plates (8) are fixedly connected to the fixing ring (6) and the sampling barrel (5), an electric push rod (9) is fixedly connected inside the sampling barrel (5), an active plate (10) is fixedly connected to the output end of the electric push rod (9), a fixing rod (11) is fixedly connected to the lower side of the active plate (10), a driven plate (12) is slidably sleeved on the outer side of the fixing rod (11), a differential assembly for controlling the movement of the active plate (10) and the driven plate (12) is installed inside the sampling barrel (5), the differential assembly comprises a fixedly mounted A positioning rod (14) is disposed on the upper side of the fixed ring (6); a rotating cylinder (15) is rotatably sleeved on the outer side of the positioning rod (14); a first gear (16) is fixedly sleeved on the outer side of the rotating cylinder (15); a first rack (20) is fixedly connected to the upper side of the active plate (10); the first rack (20) and the first gear (16) are meshed with each other; a connecting rod (18) is fixedly connected to the upper side of the driven plate (12); the connecting rod (18) passes through the active plate (10) and is slidably connected to the active plate (10); a second rack (19) is fixedly connected to the side wall of the connecting rod (18); a second gear (17) is also fixedly sleeved on the outer side of the rotating cylinder (15); the second gear (17) and the second rack (19) are meshed with each other.

2. A groundwater sampling device according to claim 1, characterized in that: The sampling barrel (5) has a plurality of water inlet holes (21) formed on its side wall. A control assembly for controlling the water inlet holes (21) is installed in the sampling barrel (5). The control assembly comprises a plurality of conical cavities (25) formed in the sampling barrel (5). The plurality of conical cavities (25) are in communication with the water inlet holes (21). The fixing ring (6) has a plurality of cavities (29) formed in the fixing ring. The plurality of cavities (29) and the water inlet holes (21) are arranged opposite to each other. A fixing box (28) is fixedly connected between the plurality of cavities (29) and the conical cavities (25). A first spring (27) is fixedly connected to the upper side of the fixing box (28). A baffle (26) is fixedly connected to the upper side of the first spring (27).

3. A groundwater sampling device according to claim 2, characterized in that: A threaded ring (30) is rotatably connected inside the fixed box (28), a connecting wire (34) is wound around the outside of the threaded ring (30), the connecting wire (34) passes through the side wall of the fixed box (28), the connecting wire (34) is fixedly connected to the baffle (26), a threaded rod (31) is sleeved on the inner thread of the threaded ring (30), the threaded rod (31) passes through the fixed box (28) and is slidably connected to the fixed box (28), a rotating block (32) is rotatably connected to the lower side of the threaded rod (31), a second spring (33) is rotatably connected to the upper side of the rotating block (32), the second spring (33) is fixedly connected to the fixed ring (6), a plurality of groups of fixed cylinders (22) are circumferentially fixedly connected to the lower side of the fixed ring (6), a threaded groove (37) is formed inside the plurality of groups of fixed cylinders (22), a clamping rod (36) is slidably connected to the threaded groove (37), and the clamping rod (36) is fixedly connected to the rotating block (32).

4. A groundwater sampling device according to claim 3, characterized in that: A square tube (23) is fixedly connected to the outer side of the rotating block (32), a rotating plate (24) is slidably sleeved inside the square tube (23), and a third spring (42) is fixedly connected between the rotating plate (24) and the square tube (23).

5. A groundwater sampling device according to claim 4, characterized in that: The upper side of the active plate (10) is rotatably connected to a rotating ring (13), the outer side of the rotating ring (13) is evenly and fixedly connected to multiple groups of shift rods (39), the outer side of the rotating ring (13) is fixedly connected to an arc plate (41), and the arc plate (41) is located at the lower side of the rotating block (32).

6. A groundwater sampling device according to claim 5, characterized in that: A plurality of groups of rubber rods (38) are evenly and fixedly connected to the inner side of the active plate (10), and the plurality of groups of rubber rods (38) are located on the inner side of the rotating ring (13) and abut against the rotating ring (13).

7. A groundwater sampling device according to claim 6, characterized in that: A sliding groove (40) is formed on the side wall of the threaded rod (31), a sliding block (35) is slidably connected in the sliding groove (40), and the sliding block (35) is fixedly connected to the cavity (29).

8. A groundwater sampling device according to claim 7, characterized in that: The upper side of the sampling barrel (5) is provided with a plurality of groups of openings, and threaded blocks are screwed into the plurality of groups of openings.

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