Sample collection auxiliary device for groundwater resource investigation

Abstract

The invention relates to a sample collection auxiliary device for groundwater resource investigation, which belongs to the technical field of groundwater sample collection, is configured and connected to the bottom of a sampler, and comprises a tank body vertically arranged at the bottom of the sampler, and a conical balancing weight arranged right below the bottom of the tank body, the plurality of impact columns vertically penetrate through the bottom of the tank body in a surrounding manner at equal intervals by taking the center line of the tank body as the center, the connecting plate is horizontally arranged in the tank body, the lower side of the connecting plate is fixedly connected with the tops of the impact columns, and the linear displacement mechanism is arranged on the tank body. The linear displacement mechanism is used for driving the impact column to impact the top of the conical balancing weight from top to bottom, so that the conical balancing weight obtains larger potential energy, a rope between the sampler and a wellhead is straightened in an auxiliary manner, and a distance mark on the rope conforms to the actual depth of the sampler; the specific depth of the monitoring sampling well is accurately sampled, so that a sample of a specific layer of underground water is obtained.

Description

Technical Field

[0001] This invention belongs to the field of groundwater sampling technology, specifically relating to an auxiliary device for sampling in groundwater resource surveys. Background Art

[0002] Groundwater resource survey sample collection is of vital importance in the field of hydrogeological environmental monitoring. By studying the hydrological characteristics of groundwater based on the collected water samples, we can monitor the quality, quantity, distribution, and flow characteristics of groundwater, and promptly detect changes in groundwater resources. This is of great significance for the rational planning and management of groundwater resources, protection of the water environment, water resource utilization, and pollution prevention and control.

[0003] When sampling groundwater, the most common methods are well water, spring water, or natural outflow points, where samples can be directly collected using samplers. However, these sampling methods are often concentrated near residential areas and river basins, which can lead to insufficient representativeness of the sampling results, making it difficult for the collected water samples to characterize the actual moisture content of the groundwater in the area. To improve the comprehensiveness of groundwater resource surveys, in addition to sampling from well water, spring water, or natural outflow points, monitoring wells are drilled at multiple locations on the ground surface in the area. Using monitoring wells for water sampling not only improves the overall integrity of water sampling in the area, thus obtaining more comprehensive water quality data, but also allows for the design of the monitoring well depth. For example, samplers can collect water samples from depths of 40m-150m, enabling the acquisition of water quality information at specific strata. This is particularly important for studying the vertical distribution of groundwater quality and the differences in water quality between different aquifers. Therefore, monitoring wells are widely used in groundwater resource surveys.

[0004] When sampling groundwater at a specific depth in a monitoring well, a hollow sampler and a counterweight are typically fixed to one end of a rope. The sampler is moved downwards along the well by continuously releasing the rope. Following the distance markings on the rope, the sampler reaches the sampling depth, and the inlet is then opened remotely to obtain a water sample from the specific layer. However, during prolonged use, the well walls can crack and deform due to erosion from water and external soil. This causes the sampler and counterweight to collide and rub against the well walls and deformed protrusions as they move downwards. This reduces the pulling force of the counterweight on the rope, resulting in the rope not being taut between the sampler and the wellhead. Consequently, the actual sampling depth does not match the distance markings on the rope, making it difficult to accurately obtain a water sample from the specific layer.

[0005] Currently, existing technologies often employ larger counterweights to address these issues, utilizing the greater gravity of the counterweights to straighten the rope between the sampler and the wellhead. However, carrying larger counterweights in the field is extremely inconvenient, and their larger size increases the likelihood of collisions and friction with the well wall, preventing the rope from being fully straightened and limiting the improvement in the accuracy of sampling at specific strata. Summary of the Invention

[0006] In view of this, the present invention provides a sample collection auxiliary device for groundwater resource surveys to overcome the shortcomings of the prior art. The present invention can help straighten the rope between the sampler and the wellhead without the need for a larger counterweight, thereby accurately sampling at a specific depth of the monitoring sampling well.

[0007] The technical solution of this invention is: a sample collection auxiliary device for groundwater resource surveys, configured and connected to the bottom of a sampler, with the top of the sampler connected to one end of a rope. The device includes a tank vertically positioned at the bottom of the sampler, connected to the sampler; a conical counterweight positioned directly below the bottom of the tank and coaxial with the centerline of the tank; the top of the conical counterweight connected to the bottom of the tank via a connecting rope to drive the sampler downwards along the monitoring sampling well; multiple impact columns equally spaced around the bottom of the tank, slidably and sealingly connected to the tank; a connecting plate horizontally positioned within the tank, its lower side fixedly connected to the top of the impact columns; and a linear displacement mechanism positioned on the tank, its output end connected to the connecting plate to drive the connecting plate up and down, causing the impact columns to move downwards and strike the top of the conical counterweight, thus straightening the rope between the sampler and the wellhead.

[0008] Preferably, an elastic element is vertically provided between the connecting plate and the inner top of the tank body, with one end of the elastic element connected to the tank body and the other end abutting against the upper side of the connecting plate.

[0009] Preferably, the upper side of the tank has multiple through holes, the connecting plate abuts against the inner wall of the tank, and the connecting plate is slidably and sealingly connected to the tank in a vertical direction.

[0010] Preferably, the through holes are arranged along the radial direction of the tank body.

[0011] Preferably, the linear displacement mechanism includes: multiple cylinders, which are equally spaced and vertically arranged around the top of the tank. The piston rods of the cylinders extend into the interior of the tank and are slidably and sealingly connected to the tank. The piston rods are fixedly connected to the upper side of the connecting plate, and the tail of the cylinder is fixedly connected to the sampler.

[0012] Preferably, the top of the conical counterweight has multiple horizontally arranged connecting rods arranged radially at equal intervals. The ends of the multiple connecting rods that are close to each other are respectively hinged to the conical counterweight through hinge shafts. The hinge shafts are perpendicular to the connecting rods and the impact column, respectively. The other ends of the connecting rods are respectively provided with blades horizontally. The conical counterweight is provided with a drive mechanism. The output end of the drive mechanism is respectively connected to the connecting rods to drive the connecting rods to swing back and forth.

[0013] Preferably, the driving mechanism includes: multiple L-shaped sliding blocks and gears. The multiple L-shaped sliding blocks are arranged radially on the top of the conical counterweight. The horizontal sections of the L-shaped sliding blocks are located directly below the hinge shaft. The upper side of the horizontal section of the L-shaped sliding block is continuously provided with toothed grooves along its length. The gears are fitted onto the hinge shaft one by one, and the toothed grooves mesh with the gears. The vertical sections of the L-shaped sliding blocks are provided with arc-shaped inclined surfaces on their adjacent sides. The arc-shaped inclined surfaces are located directly below the impact column. The hinge shaft is rotatably connected to the conical counterweight through a torsion spring.

[0014] Preferably, a connecting tube is coaxially sleeved at one end of the connecting rod near the blade, the connecting tube is rotatably connected to the connecting rod around its circumference, the end of the connecting tube away from the conical counterweight is fixedly connected to the blade, the conical counterweight is provided with a rotating mechanism, and the output end of the rotating mechanism is connected to the connecting tube.

[0015] Preferably, the rotating mechanism includes: multiple columns, a first baffle, and a second baffle. The columns are horizontally fixed on one side of the connecting pipe along its radial direction. The multiple first baffles are horizontally arranged directly below the columns, with the columns abutting against the upper side of the first baffles. The first baffles are fixedly connected to the conical counterweight. The multiple second baffles are arranged on the side of the first baffles near the center line of the conical counterweight and above the first baffles. The second baffles are fixedly connected to the conical counterweight via support rods.

[0016] Compared with existing technologies, the present invention provides a sample collection auxiliary device for groundwater resource surveys. A conical counterweight drives the sampler downwards along the monitoring sampling well. During the downward movement of the sampler, an impact column, a connecting plate, and a linear displacement mechanism within the tank work together. The linear displacement mechanism drives the impact column to strike the top of the conical counterweight from top to bottom, allowing the conical counterweight to gain greater potential energy. This helps to straighten the rope between the sampler and the wellhead, ensuring that the distance markings on the rope match the actual depth of the sampler. Furthermore, it eliminates the need for a larger counterweight and can accurately sample at specific depths of the monitoring sampling well to obtain samples from specific groundwater layers. Attached Figure Description

[0017] Figure 1 This is a front view of the data acquisition auxiliary device of the present invention; Figure 2 This is a top view of the data acquisition auxiliary device of the present invention; Figure 3 This is the present invention. Figure 1 AA section view in the middle; Figure 4 This is the present invention. Figure 1 BB section view in the middle; Figure 5 This is the present invention. Figure 4 Enlarged diagram of point C in the diagram; Figure 6 This is a front view of the conical counterweight block of the present invention; Figure 7 This is a top view of the conical counterweight block of the present invention; Figure 8 This is a top view of the L-shaped sliding block of the present invention; Figure 9 This is the present invention. Figure 8 DD section view in the image. Detailed Implementation

[0018] This invention provides a sample collection auxiliary device for groundwater resource surveys, which is described below in conjunction with... Figures 1 to 9 The present invention is illustrated by the structural diagram shown below.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] Groundwater resource surveys and sample collection play a crucial role in geological environment monitoring. Studying the hydrological characteristics of groundwater based on collected water samples not only helps to understand the flow patterns, recharge areas, and discharge areas of groundwater, and assists in monitoring changes in water quality and quantity, but also enables the detection of harmful substances (such as heavy metals, pesticides, and industrial pollutants), allowing for the monitoring of groundwater pollution and providing a foundation for environmental protection and water resource management.

[0021] When sampling groundwater, the most common methods are well water, spring water, or natural outflow points, where water samples can be collected directly using samplers. However, these sampling methods are often concentrated near residential areas and river basins, which can lead to insufficient representativeness of the sampling results. This makes it difficult for the collected water samples to characterize the actual moisture content of the groundwater in the area. For example, natural outflow points (such as spring water) may be affected by surface pollution sources, such as agricultural drainage, industrial wastewater, and landfill leachate, which can affect the representativeness of the water quality. This is especially true in areas rich in groundwater resources, where it is difficult to accurately understand the status of groundwater resources in the area.

[0022] To improve the comprehensiveness of groundwater resource surveys, in addition to sampling from wells, springs, or natural outflow points, monitoring sampling wells are drilled at multiple locations on the surface of the area to collect water samples. These monitoring sampling wells are typically designed underground to avoid direct surface pollution sources, resulting in more representative water samples, especially reliable for pollution source tracing and long-term water quality monitoring. This not only improves the overall quality of water sampling in the area, leading to more comprehensive water quality data, but also allows for the design of well depths. For example, samplers can collect water samples from depths of 40m-150m, obtaining water quality information from specific strata. This is particularly important for studying the vertical distribution of groundwater quality and the differences in water quality between different layers. Furthermore, monitoring wells are typically used for long-term water quality monitoring, continuously capturing trends in groundwater quality changes. In contrast, the water quality of natural outflow points such as springs is significantly affected by seasonal factors, precipitation, and temperature, potentially exhibiting large fluctuations and making it difficult to reflect long-term water quality trends. Therefore, monitoring sampling wells are widely used in groundwater resource surveys.

[0023] When sampling groundwater at a specific depth in a monitoring well, a hollow sampler and a counterweight are typically fixed to one end of a rope. A support frame is used to mount a rope winding rod directly above the wellhead. Rotating the rope winding rod continuously releases the rope, causing the sampler to move downwards along the monitoring well. The sampler reaches the sampling depth according to the distance markings on the rope, and then the sampler's inlet is opened remotely to obtain a water sample from the specific layer. However, during prolonged use, the well wall of the monitoring well may crack or deform due to erosion from water and external soil. This causes the sampler and counterweight to collide and rub against the well wall and deformed protrusions as they move downwards. This reduces the pulling force of the counterweight on the rope, resulting in the rope between the sampler and the wellhead not being taut. Consequently, the actual sampling depth does not match the distance markings on the rope, making it difficult to accurately obtain a water sample from the specific layer.

[0024] Currently, existing technologies often employ larger counterweights to address these issues, utilizing the greater gravity of the counterweights to straighten the rope between the sampler and the wellhead. However, carrying larger counterweights in the field is extremely inconvenient, and their larger size increases the likelihood of collisions and friction with the well wall, preventing the rope from being fully straightened and limiting the improvement in the accuracy of sampling at specific strata.

[0025] To address the aforementioned issues, this invention provides a groundwater resource survey sample collection auxiliary device. A conical counterweight drives the sampler downwards along the monitoring sampling well. During this downward movement, an impact column, connecting plate, and linear displacement mechanism within the tank work together. The linear displacement mechanism drives the impact column to strike the top of the conical counterweight from above, increasing the counterweight's potential energy. This helps straighten the rope between the sampler and the wellhead, ensuring the distance marker on the rope matches the actual depth of the sampler. Furthermore, without requiring a larger counterweight, this device accurately samples at specific depths within the monitoring sampling well to obtain groundwater samples from specific strata.

[0026] Figure 1 This is a front view of the data acquisition auxiliary device in this embodiment, with reference to... Figure 1 As shown, a sample collection auxiliary device for groundwater resource survey is configured and connected to the bottom of a sampler. The top of the sampler is connected to one end of a rope. The device includes a tank 1 vertically positioned at the bottom of the sampler and connected to the sampler. A conical counterweight 2 is positioned directly below the bottom of the tank 1 and coaxial with the center line of the tank 1. The top of the conical counterweight 2 is connected to the bottom of the tank 1 via a connecting rope 16 to drive the sampler to move downward along the monitoring sampling well. Multiple impact columns 3 are equally spaced around the bottom of the tank 1 and are vertically inserted around it. The impact columns 3 are slidably and sealed to the tank 1 vertically. A connecting plate 4 is horizontally positioned in the tank 1, and the lower side of the connecting plate 4 is fixedly connected to the top of the impact columns 3. A linear displacement mechanism is positioned on the tank 1, and the output end of the linear displacement mechanism is connected to the connecting plate 4 to drive the connecting plate 4 to move up and down, so that the impact columns 3 move downward to impact the top of the conical counterweight 2, thereby straightening the rope between the sampler and the wellhead.

[0027] In this embodiment, the sample collection auxiliary device is installed at the bottom of the sampler, and the top of the sampler is connected to one end of the rope. During sampling, the conical counterweight 2, the tank 1, and the sampler are sequentially lowered into the monitoring sampling well. The release point of the rope at the wellhead is located at the center of the wellhead, and the rope is continuously released. The weight of the conical counterweight 2, the tank 1, and the sampler overcomes the buoyancy of the tank 1 and the sampler in the water, allowing the conical counterweight 2, the tank 1, the sampler, and the rope to move downwards. As the rope is released and extended, the conical counterweight 2, the tank 1, or the sampler will rub against the well wall of the monitoring sampling well, causing the pulling force of the weight of the conical counterweight 2, the tank 1, and the sampler on the rope to decrease. Small size can easily lead to bending, tilting, or other issues with the rope between the sampler and the wellhead, preventing it from being straightened. In this case, the linear displacement mechanism drives the connecting plate 4 to move upwards to the highest point in the tank (the lower end of the impact column 3 is still located outside the tank 1), and then drives the connecting plate 4 downwards so that the impact column 3 strikes the conical counterweight 2. This allows the conical counterweight 2 to gain greater potential energy, enabling it to drive the tank 1, the sampler, and the rope to move downwards at an accelerated speed. This helps to straighten the rope between the sampler and the wellhead. The sampling personnel can then determine the actual depth of the sampler based on the distance markings on the rope, thus enabling them to accurately sample at a specific depth in the monitoring well to obtain samples from specific layers of groundwater.

[0028] In this embodiment, the tank 1 and the conical counterweight 2 are connected by a connecting rope 16, so that the conical counterweight 2 can still use its center of mass stability to adjust the released rope (between the top of the sampler and the wellhead) to be vertical. The multiple impact columns 3 located outside the connecting rope 16 can ensure that the impact on the conical counterweight 2 is the same at all positions when it impacts the conical counterweight 2. This allows the conical counterweight 2 to drive the tank 1, the sampler and the rope to move downwards in a vertical direction, avoiding the rope from tilting and affecting the accuracy of sampling.

[0029] Specifically, in the above embodiments, the sampling personnel located on the ground can periodically activate the linear displacement mechanism to straighten the rope during the rope release process. Alternatively, when the distance mark on the rope reaches the sampling depth, the linear displacement mechanism can drive the impact column 3 to strike the conical counterweight 2, thereby accurately obtaining the actual depth of the sampler. Then, by pulling the rope or other means, the sampler can be brought to the depth to be sampled, thus ensuring that the water sample collected by the sampler is a sample from the specific layer of groundwater required.

[0030] Figure 3 This is a cross-sectional view (AA) of the data acquisition auxiliary device in this embodiment, with reference to... Figure 3As shown, as a further optimization, in this embodiment, an elastic element 5 is vertically arranged between the connecting plate 4 and the inner top of the tank 1. One end of the elastic element 5 is connected to the tank 1, and the other end abuts against the upper side of the connecting plate 4.

[0031] In this embodiment, an elastic element 5 is provided between the upper side of the connecting plate 4 and the inner top of the tank 1. When the linear displacement mechanism drives the connecting plate 4 to move upward, the connecting plate 4 compresses the elastic element 5 to accumulate elastic potential energy. When the connecting plate 4 moves to the highest point, the linear displacement mechanism drives the connecting plate 4 to move downward, and the elastic element 5 releases elastic potential energy to enhance the potential energy applied to the impact column 3 by impacting the conical counterweight 2. This ensures that the conical counterweight 2 can help straighten the rope, further improving the accuracy of sampling at specific layers.

[0032] Specifically, in the above embodiments, the elastic element 5 is a spring.

[0033] As a further optimization, in this embodiment, the upper side of the tank body 1 is provided with a plurality of through holes 11, the connecting plate 4 abuts against the inner wall of the tank body 1, and the connecting plate 4 is slidably and sealingly connected to the tank body 1 in the vertical direction.

[0034] In this embodiment, well water can enter the tank 1 through the through hole 11 on the upper side of the tank 1. When the connecting plate 4 is at the lowest point inside the tank 1, the well water entering the tank 1 increases the counterweight of the sampler, increases the pulling force on the rope during release, and reduces the bending and tilting of the rope. When the linear displacement mechanism drives the connecting plate 4 to move upward, the water in the tank 1 flows out through the through hole 11. When the linear displacement mechanism drives the connecting plate 4 to move downward, the water enters the tank 1 through the through hole 11 and uses water pressure to further accelerate and push the connecting plate 4 downward to hit the conical counterweight 2, further increasing the potential energy applied to the conical counterweight 2 and improving the effect of assisting in straightening the rope.

[0035] As a further optimization, in this embodiment, the through hole 11 is arranged along the radial direction of the tank body 1.

[0036] In this embodiment, the through hole 11 is arranged along the radial direction of the tank body 1. When the connecting plate 4 moves upward and water in the tank body 1 flows out through the through hole 11, the water flows outward and impacts the well wall of the monitoring sampling well. This causes the tank body 1 to move the conical counterweight 2, the sampler, and the rope to the middle of the monitoring sampling well. This avoids the potential energy obtained by the conical counterweight 2 from deforming and rubbing against the protrusions on the well wall when stretching the rope, further improving the effect of assisting in straightening the rope.

[0037] Figure 2 This is a top view of the data acquisition auxiliary device in this embodiment, with reference to... Figure 2As shown, as a further optimization, the linear displacement mechanism in this embodiment includes: multiple cylinders 6, which are equally spaced and vertically arranged around the top of the tank body 1. The piston rod 61 of the cylinder 6 extends into the interior of the tank body 1, and the piston rod 61 is slidably and sealingly connected to the tank body 1. The piston rod 61 is fixedly connected to the upper side of the connecting plate 4, and the tail of the cylinder 6 is fixedly connected to the sampler.

[0038] This embodiment shows the composition of the linear displacement mechanism. Multiple cylinders 6 can stably drive the connecting plate 4 to move upward, and the cylinders 6 can drive the connecting plate 4 to move downward at high speed, so that the impact column 3 can quickly impact the conical counterweight.

[0039] Specifically, in the above embodiments, when the elastic element 5 is a spring, the spring can be sleeved on the piston rod 61 of the cylinder 6. The piston rod 61 guides the spring to release elastic potential energy, which drives the connecting plate 4 to move downward at an accelerated speed to strike the conical counterweight 2, so that the elastic potential energy is transferred to the conical counterweight 2 as much as possible.

[0040] Figure 4 This is a BB cross-sectional view of the data acquisition auxiliary device in this embodiment, with reference to... Figure 4 As shown, as a further optimization, in this embodiment, the top of the conical counterweight 2 is provided with multiple connecting rods 8 arranged radially and at equal intervals. The ends of the multiple connecting rods 8 that are close to each other are respectively hinged to the conical counterweight 2 through hinge shafts. The hinge shafts are perpendicular to the connecting rods 8 and the impact column 3 respectively. The other ends of the connecting rods 8 are respectively provided with blades 9 horizontally. The conical counterweight 2 is provided with a driving mechanism. The output end of the driving mechanism is respectively connected to the connecting rods 8 to drive the connecting rods 8 to swing back and forth.

[0041] In this embodiment, multiple connecting rods 8, paddles 9, and a drive mechanism enable the drive mechanism to drive the connecting rods 8 to swing back and forth, so that the paddles 9 at the ends of the connecting rods 8 can move the water around the conical counterweight 2. The reaction force of the paddles 9 when moving the water is transmitted to the conical counterweight 2, increasing the pulling force of the conical counterweight 2 on the rope and further improving the effect of assisting in straightening the rope.

[0042] In the above embodiment, the top of the conical counterweight 2 is provided with multiple mounting slots 20 at equal intervals. The two ends of the hinge shaft on the connecting rod 8 are rotatably connected to the side wall of the mounting slot 20. The thickness of the blade 9 gradually decreases from the side closest to the connecting rod 8 to the other side, so that the edge of the blade 9 near the well wall is in a soft and elastic state, avoiding the blade 9 from getting stuck in the well wall.

[0043] In the above embodiment, the end of the blade 9 forms the outer range of the conical counterweight 2. The connecting rod 8 and the blade 9 are used to make the conical counterweight 2 located in the center of the monitoring sampling well, and to prevent the conical counterweight 2 from shaking when it moves downward.

[0044] Figure 8 This is a top view of the L-shaped sliding block in this embodiment. Figure 9 This is a DD cross-sectional view of the L-shaped sliding block in this embodiment, referring to... Figure 8 , Figure 9 As shown, as a further optimization, this embodiment provides a specific structure of a drive mechanism, which includes: multiple L-shaped sliding blocks 21 and gears 22. The multiple L-shaped sliding blocks 21 are radially arranged on the top of the conical counterweight 2. The horizontal sections of the L-shaped sliding blocks 21 are located directly below the hinge shaft. The upper side of the horizontal section of the L-shaped sliding block 21 is continuously provided with tooth grooves along its length. The gears 22 are fitted onto the hinge shaft one by one, and the tooth grooves mesh with the gears 22. The vertical sections of the L-shaped sliding blocks 21 are provided with arc-shaped inclined surfaces 23 on their adjacent sides. The arc-shaped inclined surfaces 23 are located directly below the impact column 3. The hinge shaft is rotatably connected to the conical counterweight 2 through a torsion spring.

[0045] In this embodiment, the drive mechanism utilizes an L-shaped sliding block 21 and a gear 22 to achieve the following: As the lower end of the impact column 3 moves closer to the top of the conical counterweight 2, the impact column 3 engages with the inclined surface 23 of the vertical section of the L-shaped sliding block 21, pushing the L-shaped sliding block 21 to slide outward. The tooth groove on the upper side of the horizontal section of the L-shaped sliding block 21 engages with the gear 22 on the hinge shaft, causing the gear 22 to rotate and drive the connecting rod 8 to swing upward, thus enabling the blade 9 to push water upward. Before the impact column 3 impacts the conical counterweight 2, the reaction force of the blade 9 pushing water upward causes the conical counterweight 2 to accelerate downward, pulling the rope between the sampler and the wellhead. Before the impact column 3 impacts the conical counterweight 2, the blade 9 completes the upward pushing of water, avoiding the blade 9 from generating resistance and consuming the potential energy of the impact transfer when the conical counterweight 2 straightens the rope, further improving the effect and stability of assisted straightening of the rope between the sampler and the wellhead.

[0046] Specifically, Figure 7 This is a top view of the conical counterweight in this embodiment, referring to... Figure 7As shown, in the above embodiment, a sinkhole 24 is provided in the middle of the top of the conical counterweight 2. The sinkhole 24 is coaxial with the center line of the conical counterweight 2. Multiple mounting slots 20 extend towards the middle and communicate with the sinkhole 24. The horizontal section of the L-shaped sliding block 21 passes through the mounting slot 20, and its vertical section is located in the sinkhole 24. A sliding groove 27 is provided at the bottom of the sinkhole 24 along its length. The horizontal section of the L-shaped sliding block 21 slides back and forth along the sliding groove 27. A sinkhole cover 25 is fastened on the sinkhole 24. The vertical section of the L-shaped sliding block 21 is located outside the sinkhole cover 25 and abuts against it. When the impact column 3 moves downward, it pushes the sinkhole cover 25 to move downward, thereby simultaneously pushing multiple L-shaped sliding blocks 21 to slide downward. Before the end of the sinkhole cover 25 contacts the sinkhole 24, the paddle blade 9 swings upward to complete the water dispensing. The end of the sinkhole cover 25 hits the bottom of the sinkhole 24 to apply potential energy to the conical counterweight 2.

[0047] Specifically, a guide post 26 is coaxially fixed on the settling tank 24, and the guide post 26 passes through the settling tank cover 25 and is slidably connected to it.

[0048] In the above embodiment, during the normal release of the rope, the linear displacement mechanism can be used to move the connecting plate 4 downward a certain distance, causing the connecting rod 8 and the blade 9 to swing upward, reducing the influence of water resistance on the rope pull of the blade 9, and preventing water from entering the tank 1 and increasing the pull on the rope.

[0049] As a further optimization, in this embodiment, a connecting tube 10 is coaxially sleeved at one end of the connecting rod 8 near the blade 9. The connecting tube 10 is rotatably connected to the connecting rod 8 around its circumference. The end of the connecting tube 10 away from the conical counterweight 2 is fixedly connected to the blade 9. A rotating mechanism is provided on the conical counterweight 2, and the output end of the rotating mechanism is connected to the connecting tube 10.

[0050] In this embodiment, the connecting pipe 10 is used to achieve a rotatable connection between the paddle 9 and the connecting rod 8. When the paddle 9 pushes water upward and completes its downward swing, the connecting pipe 10 is rotated by the rotating mechanism, so that the paddle 9 changes from a horizontal state to a vertical state. This avoids the paddle 9 swinging downward to push water after it pushes water upward and hits the conical counterweight 2 to straighten the rope, thus reducing the effect of the conical counterweight 2 accelerating downward movement and further ensuring the straightening effect of the rope.

[0051] Figure 5 This is an enlarged schematic diagram of point C of the data acquisition auxiliary device in this embodiment. Figure 6 This is a front view of the conical counterweight in this embodiment, referring to... Figure 5 , Figure 6As shown, as a further optimization, this embodiment provides a specific structure of a rotating mechanism, which includes: multiple columns 12, a first baffle 13, and a second baffle 14. The columns 12 are respectively fixed horizontally on one side of the connecting pipe 10 along its radial direction. The multiple first baffles 13 are horizontally arranged directly below the columns 12, with the columns 12 abutting against the upper side of the first baffles 13. The first baffles 13 are fixedly connected to the conical counterweight 2. The multiple second baffles 14 are arranged on the side of the first baffle 13 near the center line of the conical counterweight 2 and above the first baffle 13. The second baffles 14 are fixedly connected to the conical counterweight 2 through a support rod 15.

[0052] In this embodiment, multiple columns 12, a first baffle 13, and a second baffle 14 of the rotating mechanism are used. When the connecting rod 8 drives the connecting pipe 10 to swing upward and is about to complete the water dispensing, the columns 12 on the connecting pipe 10 slide in contact with the lower side of the second baffle 14, thereby causing the connecting pipe 10 to rotate clockwise and making the blade 9 approach a vertical state. When the connecting rod 8 drives the connecting pipe 10 to swing downward, the columns 12 on the connecting pipe 10 will slide in contact with the upper side of the first baffle 13, causing the columns 12 and the blade 9 to return to a horizontal position. Repeating the above process completes the upward water dispensing of the blade 9 and the downward water cutting of the blade 9 to return to its original position.

[0053] Specifically, in the above embodiment, the column 12 on the connecting pipe 10 contacts the second baffle 14, driving the connecting pipe 10 to rotate clockwise by an angle of less than 90°, and the column 12 contacts and slides on the upper side of the first baffle 13, so that the connecting pipe 10 can rotate counterclockwise to return to its original position.

[0054] The above-disclosed embodiments are merely preferred embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A sample collection auxiliary device for groundwater resource surveys, configured and connected to the bottom of a sampler, wherein the top of the sampler is connected to one end of a rope, characterized in that, include: A tank is vertically installed at the bottom of the sampler, and the tank is connected to the sampler; A conical counterweight is positioned directly below the bottom of the tank and coaxial with the center line of the tank. The top center of the conical counterweight is connected to the bottom of the tank via a connecting rope to drive the sampler to move downward along the monitoring sampling well. Multiple impact columns are vertically inserted around the bottom of the tank at equal intervals, with the center line of the tank as the center. The impact columns are slidably and sealed to the tank along the vertical direction. A connecting plate is horizontally installed in the tank, and the lower side of the connecting plate is fixedly connected to the top of the impact column; A linear displacement mechanism is installed on the tank body. The output end of the linear displacement mechanism is connected to the connecting plate and is used to drive the connecting plate to move up and down so that the impact column moves downward to hit the top of the conical counterweight block and straighten the rope between the sampler and the wellhead.

2. The sample collection auxiliary device for groundwater resource survey according to claim 1, characterized in that, An elastic element is vertically provided between the connecting plate and the inner top of the tank. One end of the elastic element is connected to the tank, and the other end abuts against the upper side of the connecting plate.

3. The sample collection auxiliary device for groundwater resource survey according to claim 1, characterized in that, The upper side of the tank has multiple through holes, and the connecting plate abuts against the inner wall of the tank. The connecting plate is slidably and sealed to the tank along the vertical direction.

4. The sample collection auxiliary device for groundwater resource survey according to claim 3, characterized in that, The through holes are arranged along the radial direction of the tank.

5. The sample collection auxiliary device for groundwater resource survey according to claim 1, characterized in that, The linear displacement mechanism includes: multiple cylinders, which are equally spaced and vertically arranged around the top of the tank. The piston rods of the cylinders extend into the interior of the tank and are slidably and sealingly connected to the tank. The piston rods are fixedly connected to the upper side of the connecting plate, and the tail of the cylinder is fixedly connected to the sampler.

6. The sample collection auxiliary device for groundwater resource survey according to claim 1, characterized in that, The top of the conical counterweight has multiple horizontally arranged connecting rods arranged radially at equal intervals. The ends of the multiple connecting rods that are close to each other are respectively hinged to the conical counterweight through hinge shafts. The hinge shafts are perpendicular to the connecting rods and the impact column, respectively. The other ends of the connecting rods are horizontally provided with blades. The conical counterweight is provided with a driving mechanism. The output end of the driving mechanism is connected to the connecting rods to drive the connecting rods to swing back and forth.

7. The sample collection auxiliary device for groundwater resource survey according to claim 6, characterized in that, The driving mechanism includes: multiple L-shaped sliding blocks and gears. The multiple L-shaped sliding blocks are radially arranged on the top of the conical counterweight. The horizontal sections of the L-shaped sliding blocks are located directly below the hinge shaft. The upper side of the horizontal section of the L-shaped sliding block is continuously provided with toothed grooves along its length. The gears are fitted onto the hinge shaft one by one, and the toothed grooves mesh with the gears. The vertical sections of the L-shaped sliding blocks are provided with arc-shaped inclined surfaces on their adjacent sides. The arc-shaped inclined surfaces are located directly below the impact column. The hinge shaft is rotatably connected to the conical counterweight through a torsion spring.

8. The sample collection auxiliary device for groundwater resource survey according to claim 6, characterized in that, A connecting tube is coaxially sleeved at one end of the connecting rod near the blade. The connecting tube is rotatably connected to the connecting rod around its circumference. The end of the connecting tube away from the conical counterweight is fixedly connected to the blade. A rotating mechanism is provided on the conical counterweight, and the output end of the rotating mechanism is connected to the connecting tube.

9. The sample collection auxiliary device for groundwater resource survey according to claim 8, characterized in that, The rotating mechanism includes: multiple columns, a first baffle, and a second baffle. The columns are horizontally fixed on one side of the connecting pipe along its radial direction. The multiple first baffles are horizontally arranged directly below the columns, with the columns abutting against the upper side of the first baffles. The first baffles are fixedly connected to the conical counterweight. The multiple second baffles are arranged on the side of the first baffles near the center line of the conical counterweight and above the first baffles. The second baffles are fixedly connected to the conical counterweights via support rods.

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