Pollutant sampling device and method for water environment engineering detection

Abstract

The invention discloses a pollutant sampling device and method for water environment engineering detection, and belongs to the technical field of water area detection sampling, the device comprises a first floating ball and a second floating ball, and the opposite surfaces of the first floating ball and the second floating ball are fixedly connected through a support frame; the peripheral side of the supporting frame is connected with a plurality of stable air bags which are arrayed in a surrounding mode along the axis, interval sampling is carried out during floating, the collecting effect on different water areas of a water body is improved, the more accurate monitoring on the pollution degree of the water body is improved, water liquid in the water body is pumped through an infusion pump pipeline and then fed into a balance weight water tank, and therefore the water body pollution degree is improved. When the water liquid in the counterweight water tank is gradually increased, the counterweight water tank can slide downwards at the bottom opening of the first floating ball, the counterweight water tank can drive the bottom liquid inlet seat and the disturbance turbine to move downwards, and by controlling the water storage amount of the counterweight water tank and controlling the liquid inlet depth of the liquid inlet seat in the water body, graded sampling at different water body depths is facilitated; and the sampling precision and the sampling effect can be improved.

Description

Technical Field

[0001] This invention belongs to the field of water area testing and sampling technology, and particularly relates to a pollutant sampling device and method for water environment engineering testing. Background Technology

[0002] Water environment engineering refers to the engineering field that protects, manages, and controls the water environment through scientific methods and technologies. It involves monitoring, assessing, controlling pollutants, utilizing water resources, and restoring water bodies. Water quality management involves monitoring and assessing the water quality of water bodies and formulating corresponding management measures to ensure the safe and sustainable use of water. Traditionally, water quality monitoring in water bodies relies on manual sampling and testing. Monitoring points are relatively fixed due to human limitations, making it impossible to reflect the overall water quality situation within the entire water area.

[0003] Chinese Patent Application Publication No. CN115479804B discloses a marine floating automatic sampler based on a sequence controller, including a buoy, an automatic sampler disposed below the buoy, the automatic sampler including sampling bottles arranged around the buoy, a filter head and an electromagnetic one-way valve connected to the bottom of each sampling bottle, water pumps connected to the pipes above the multiple sampling bottles, a microcontroller and a motor inside the automatic sampler, a rotary valve fixedly connected to the motor shaft, multiple swingable auxiliary components connected around the side of the buoy, and an annular float on the outer side of the bottom of the automatic sampler, with multiple hinged components interspersed in the annular float. This device floats on the sea surface using a buoy and controls the rotation of a motor via a sequence control program within a microcontroller, enabling automatic and timed collection of upper ocean water samples. While it boasts a simple structure, protective features, and improved accuracy in seawater sampling and testing, in practical use, it can only collect samples from the upper ocean layer. Detecting changes in water flow at a single depth within a river basin cannot adequately reflect the overall situation. Furthermore, the increased number of floating objects and obstacles in rivers compared to the ocean can easily cause interference, affecting the effectiveness of the floating sampling. Summary of the Invention

[0004] The purpose of this invention is to address the problem that changes in water flow at a single depth in a watershed cannot adequately reflect the overall situation, and that the increased number of floating objects and obstacles in rivers compared to the ocean can easily cause interference and affect the effectiveness of floating sampling. Therefore, this invention proposes a pollutant sampling device and method for water environment engineering testing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pollutant sampling device for water environment engineering testing includes a first float and a second float. The opposing surfaces of the first float and the second float are fixedly connected by a support frame. A plurality of stabilizing airbags are connected to the outer periphery of the support frame and arranged in a circumferential array along the axis. An outer flexible ring is connected between the outer sides of the plurality of stabilizing airbags.

[0007] The inner cavity of the support frame is equipped with a sample storage mechanism, which is located inside the second float. A sampling pump for drawing liquid is installed on the top of the sample storage mechanism. A sampling valve tube is connected to the outlet of the sampling pump. A connecting pipe for discharging liquid is connected to the bottom side of the sampling valve tube. One end of the inlet of the sampling valve tube is connected to a corrugated pipe through a connecting bend, and the other end of the corrugated pipe is connected to an inlet seat.

[0008] The first float has an opening on its bottom side, and a counterweight water tank is slidably connected to the opening in the vertical direction. A depth control mechanism is connected to the top of the counterweight water tank. The depth control mechanism is connected to the first float and is used to drive the counterweight water tank to slide up and down along the opening. The liquid inlet seat is connected to the bottom side of the counterweight water tank and is used to adjust the sampling depth of the liquid inlet seat by adjusting the weight of the counterweight water tank to drive the liquid inlet seat to move synchronously.

[0009] Furthermore, the liquid inlet seat includes a pipe pile portion and stepped portions respectively provided on the upper and lower sides of the pipe pile portion. The stepped portions on both sides form a gap. Multiple liquid inlet grooves are provided on the sidewalls along the radial direction on the opposite surfaces of the stepped portions on both sides. A disturbance turbine is rotatably connected to the outside of the pipe pile portion of the liquid inlet seat. The disturbance turbine can rotate around the axis of the pipe pile portion.

[0010] Furthermore, the depth control mechanism includes a fixed cover plate connected to the top of the counterweight water tank. The bottom side of the counterweight water tank has a through hole for a corrugated pipe to pass through. The corrugated pipe passes through the through hole and can move up and down with the counterweight water tank. The top of the fixed cover plate is connected to a liquid pump via a pipe. Pipes on both sides of the liquid pump extend to the bottom side of the inner cavity of the counterweight water tank and into the corrugated pipe, respectively. This is used to increase the weight of the counterweight water tank by drawing water from the corrugated pipe and injecting it into the counterweight water tank, or to decrease the weight by drawing water from the counterweight water tank and discharging it, thereby adjusting the overall weight of the counterweight water tank.

[0011] Furthermore, the top of the fixed cover plate is connected to both radial sides with lifting ropes. The ends of the lifting ropes are provided with elastic winding parts. The elastic winding parts are connected to the top side of the counterweight part connected to the inner cavity of the first float. The elastic winding parts include a rewind bearing. After the counterweight water tank is drained and its weight is reduced, the rewinding force of the rewind bearing drives the lifting rope to wind, thereby pulling the counterweight water tank upward to reset.

[0012] Furthermore, the sample storage mechanism includes a sample storage tray, which is rotatably connected to the inner side of the support frame. The top of the sample storage tray has multiple placement holes, and a sample storage tube is detachably inserted into each placement hole. A connecting plate is connected to the inner side of the sample storage tray, and a first driving ring is connected to the bottom of the connecting plate. A placement ring is rotatably connected to the bottom side of the first driving ring. Support plates are connected to both sides of the bottom of the placement ring via first electric push rods. The support plates are connected to one side of the inner cavity of the support frame. A driving part is connected to one side of the first driving ring. The driving part is connected to the top of the placement ring and is used to drive the first driving ring to rotate, thereby driving the connecting plate and the sample storage tray to rotate synchronously.

[0013] Furthermore, one side of the support plate extends vertically upward to form a vertical support section, and a connecting frame is connected to the top of the vertical support section, which is connected to the outside of the sampling pump.

[0014] Furthermore, a liquid distribution and pushing mechanism is connected to the bottom side of the support frame. The liquid distribution and pushing mechanism includes an outer fixed ring. The inner periphery of the outer fixed ring is connected to an inner fixed ring through multiple liquid inlet pipes arranged around the axis. The outer periphery of the outer fixed ring extends to the bottom of the support frame through an outlet pipe and is connected to a drain guide pipe connected to the outer edge of the bottom of the support frame. The inner sidewall of the inner fixed ring has an inlet corresponding to the position of the liquid inlet pipe. A supply ring is rotatably connected to the inner side of the inner fixed ring. The inner side of the supply ring is connected to one side of the outer wall of the corrugated pipe through a pump pipe. A pump body is installed on the inner side of the pump pipe. A supply port corresponding to the inlet is opened on the outer side of the supply ring. A second driving ring is connected to the inner side of the supply ring. The second driving ring is connected to the bottom side of the support frame and is used to drive the supply ring to rotate around the axis of the inner fixed ring to adjust the communication state between the supply port of the supply ring and the inlet of the inner fixed ring.

[0015] Furthermore, the outer flexible ring is an elastic plastic ring, and multiple arc-shaped collapse grooves are provided on the inner side of the outer flexible ring. The arc-shaped collapse grooves are used to absorb impact energy through collapse deformation when the device is subjected to external impact, so as to protect the stabilizing airbag.

[0016] A pollutant sampling method for water environment engineering testing, based on the above-mentioned device, includes the following steps:

[0017] S1: Device Deployment and Stability

[0018] The device is deployed to the target water area, and the first and second floats float on the water surface. The stabilizing airbags on the outer periphery of the support frame are inflated and deployed, and the outer flexible ring is wrapped around the outer periphery of the stabilizing airbags. Through the buoyancy of the stabilizing airbags and the circumferential constraint of the outer flexible ring, the device is kept floating stably, avoiding water flow disturbance that could cause it to capsize or drift.

[0019] S2: Sampling depth adjustment

[0020] The weight of the counterweight tank is adjusted by the depth control mechanism to drive the inlet seat to the target depth.

[0021] Weighting and sinking: Start the pump to draw water from the bellows and inject it into the counterweight tank. The weight of the counterweight tank increases and slides downward along the bottom opening of the first float, causing the inlet seat to move down synchronously, and the bellows extends downward accordingly.

[0022] Weight reduction and buoyancy: Start the liquid pump to pump water in reverse and discharge the water in the counterweight water tank to the corrugated pipe or water area. The weight of the counterweight water tank is reduced. The elastic winding part pulls the hoisting rope through the rewind bearing, which drives the counterweight water tank and liquid inlet seat to reset upward.

[0023] Depth locking: After the liquid inlet reaches the target depth, the pump stops, the weight of the counterweight tank remains stable, and the liquid inlet maintains the current sampling depth;

[0024] S3: Water Sampling and Mixing

[0025] Start the sampling pump to extract water samples at the target depth:

[0026] The sampling pump generates negative pressure through the sampling valve pipe, connecting bend and bellows, and the inlet tank of the inlet seat draws in water sample;

[0027] During the liquid inlet process, the water flow drives the disturbance turbine to rotate around the pipe pile, disturbing the water around the liquid inlet seat, so that the water sample is evenly mixed before entering the corrugated pipe.

[0028] The mixed water sample enters the sampling pump sequentially through the corrugated pipe, connecting bend, and sampling valve pipe.

[0029] S4: Water Sample Storage and Switching

[0030] The sampling pump delivers the water sample to the sample storage facility via a connecting pipe:

[0031] Single sample storage: The drive unit drives the first drive ring to rotate, which in turn drives the sample storage tray to rotate, so that a sample storage tube is aligned with the liquid outlet of the connecting tube, and the water sample is injected into the sample storage tube.

[0032] Multiple sample switching: After a single water sample is stored, the first electric push rod retracts, causing the sample storage tray to move down and the sample storage tube to separate from the connecting tube; the drive unit drives the sample storage tray to rotate again, so that the next sample storage tube is aligned with the connecting tube; the first electric push rod extends, the sample storage tube moves up to reset and connects with the connecting tube, and the water sample injection steps are repeated to achieve independent storage of multiple water samples.

[0033] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0034] 1. In this invention, when sampling water pollutants, a first float and a second float can be placed on the water surface. When the first float is placed on the water surface, the stabilizing airbag contacts the water to ensure the floating stability of the first and second floats. As the water moves, the first and second floats float on the water surface to perform intermittent sewage sampling and store the samples in a sample storage mechanism. By sampling at intervals while floating, the sampling effect on different water areas is improved, and the monitoring of water pollution is more accurate. After the water is drawn from the water body through the pump pipeline, it is sent to the counterweight tank. As the water in the counterweight tank gradually increases, the counterweight tank can slide downward through the bottom opening of the first float. The counterweight tank can drive the bottom liquid inlet seat and the disturbance turbine to move downward. By controlling the amount of water in the counterweight tank, the liquid inlet seat can be controlled in the water body, which is beneficial for graded sampling at different water depths and improves sampling accuracy and effect.

[0035] 2. In this invention, through the designed sample storage mechanism, after a single sample tube finishes sampling, the rotation of the sample storage disk can drive another sample tube to rotate to the bottom of the sampling valve tube and the connecting tube. At this time, the first electric push rod extends and drives the sample storage disk and sample tube to reset upward and nest with the connecting tube. This is beneficial for storing and replacing multiple circumferentially arranged sample tubes through the rotatable sample storage disk, for classifying and storing graded samples during floating sampling, and for judging the water pollution situation at different nodes in the watershed through the analysis of different samples.

[0036] 3. In this invention, the rotation of the second drive ring is controlled by remote control, which drives the rotation of the liquid supply ring. The rotation of the liquid supply ring can connect the liquid supply port with the corresponding liquid inlet. At this time, the pump body can draw water from the corrugated pipe and pump it into the drainage guide pipe through the liquid inlet pipe and the liquid outlet pipe. By draining the liquid from the same direction side of the interference position, the reaction force can make the first float move away from the interference position, which is beneficial to improving the drift stability in the water body and improving the remote risk avoidance and handling capability under multiple obstacle interference conditions, thus meeting the usage requirements. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of a pollutant sampling device for water environment engineering testing proposed in this invention.

[0038] Figure 2 This is an exploded structural diagram of a pollutant sampling device for water environment engineering testing proposed in this invention.

[0039] Figure 3 This is a side half-section structural diagram of a pollutant sampling device for water environment engineering testing proposed in this invention.

[0040] Figure 4 The present invention proposes Figure 3 Enlarged structural diagram of part A in the middle;

[0041] Figure 5 This is a schematic diagram of the stable airbag assembly structure of a pollutant sampling device for water environment engineering testing proposed in this invention.

[0042] Figure 6 This is a schematic diagram of the transverse half-section structure of a pollutant sampling device for water environment engineering testing proposed in this invention.

[0043] Figure 7 The present invention proposes Figure 6 Enlarged structural diagram of section B;

[0044] Figure 8 This is a schematic diagram of the overall structure of the sample storage mechanism of a pollutant sampling device for water environment engineering testing proposed in this invention;

[0045] Figure 9 This is a schematic diagram of the overall structure of the liquid dispensing and pushing mechanism of a pollutant sampling device for water environment engineering testing proposed in this invention;

[0046] Figure 10 This is a schematic diagram of the depth control mechanism of a pollutant sampling device for water environment engineering testing proposed in this invention.

[0047] Figure 11 This is a schematic diagram of the side structure of a pollutant sampling device for water environment engineering testing proposed in this invention.

[0048] Legend:

[0049] 1. First float; 2. Second float; 3. Stabilizing airbag; 4. Sample storage mechanism; 401. Sample tray; 402. Sample tube; 403. Connecting plate; 404. First drive ring; 405. Drive unit; 406. First electric push rod; 407. Support plate; 408. Placement ring; 5. Liquid dispensing mechanism; 501. Outer fixing ring; 502. Liquid inlet tube; 503. Liquid outlet tube; 504. Inner fixing ring; 505. Liquid supply ring; 506. Pump fluid pipe; 507. Drainage guide pipe; 508. Second drive ring; 6. Inlet seat; 7. Depth control mechanism; 701. Pump; 702. Fixed cover plate; 703. Lifting rope; 704. Elastic winding part; 8. Turbine turbine; 9. Outer flexible ring; 10. Corrugated pipe; 11. Connecting bend; 12. Sampling valve pipe; 13. Connecting pipe; 14. Sampling pump; 15. Connecting frame; 16. Counterweight water tank; 17. Support frame. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Please see Figure 1-11 The present invention provides a technical solution: a pollutant sampling device for water environment engineering detection, including a first float 1 and a second float 2. The opposing surfaces of the first float 1 and the second float 2 are fixedly connected by a support frame 17. A plurality of stabilizing airbags 3 arranged in a circumferential array along the axis are connected to the outer periphery of the support frame 17. An outer flexible ring 9 is connected between the outer sides of the plurality of stabilizing airbags 3.

[0052] A sample storage mechanism 4 is installed inside the support frame 17. The sample storage mechanism 4 is located inside the second float 2. A sampling pump 14 for liquid extraction is installed on the top of the sample storage mechanism 4. A sampling valve pipe 12 is connected to the outlet of the sampling pump 14. A connecting pipe 13 for liquid discharge is connected to the bottom side of the sampling valve pipe 12. One end of the inlet of the sampling valve pipe 12 is connected to a corrugated pipe 10 through a connecting bend 11. The other end of the corrugated pipe 10 is connected to an inlet seat 6. An opening is opened on the bottom side of the first float 1. A counterweight water tank 16 is slidably connected inside the opening. A depth control mechanism 7 is connected to the top of the counterweight water tank 16. The depth control mechanism 7 is connected inside the first float 1. The inlet seat 6 is connected to the bottom side of the counterweight water tank 16 and is used to adjust the sampling depth of the inlet seat 6 by the weight of the counterweight water tank 16.

[0053] The outer flexible ring 9 is an elastic plastic ring, and multiple arc-shaped collapse grooves are formed on the inner side of the outer flexible ring 9.

[0054] The liquid inlet seat 6 includes a pipe pile portion, and stepped portions are provided on both sides of the pipe pile portion. The stepped portions on both sides form a gap. Multiple liquid inlet grooves are opened on the radial side of the opposite surface of the stepped portions of the liquid inlet seat 6. A disturbance turbine 8 is rotatably connected to the outside of the pipe pile portion of the liquid inlet seat 6 to improve the mixing uniformity.

[0055] Specifically, the outer periphery of both sides of the support frame 17 is threadedly connected to the outer periphery of the first float 1 through threaded holes and sealing washers. Meanwhile, the second float 2 is movably connected to the support frame 17 through a snap-fit. The second float 2 is equipped with a control component, which includes, but is not limited to, a positioning module for tracking position and transmitting data, a gyroscope, a camera, and a corresponding data transmission module, such as a 4G or 5G transmission module. The first float 1 is connected to a counterweight part with opposite axes and a corresponding power supply component.

[0056] In another embodiment, the control assembly at the top of the second float 2 may also be equipped with a solar panel to increase the sampling drift distance.

[0057] Specifically, when sampling water pollutants, the first float 1 and the second float 2 can be placed on the water surface. When the first float 1 is placed on the water surface, the stabilizing airbag 3 can contact the water to ensure the floating stability of the first float 1 and the second float 2. As the water moves, the first float 1 and the second float 2 can float on the water surface to conduct intermittent sewage sampling and store the samples in the sample storage mechanism 4. This allows for intermittent sampling while floating, improving the collection effect in different water areas and enabling more accurate monitoring of water pollution levels.

[0058] Please see Figure 2-3 and Figure 10 The depth control mechanism 7 includes a fixed cover plate 702, which is connected to the top of the counterweight water tank 16. The bottom side of the counterweight water tank 16 has a through hole, and the corrugated pipe 10 passes through the through hole. The top of the fixed cover plate 702 is connected to a liquid pump 701 through a pipe. The pipes on both sides of the liquid pump 701 extend to the bottom side of the inner cavity of the counterweight water tank 16 and the corrugated pipe 10, respectively, for drawing water from the corrugated pipe 10 and injecting it into the counterweight water tank 16 to adjust the weight of the counterweight water tank 16.

[0059] In another embodiment, the liquid pump 701 can be connected to the inlet valve port connected to the outside of the counterweight water tank 16 through a pipeline, and is used to pump the liquid into the counterweight water tank 16 after extraction.

[0060] The top of the fixed cover plate 702 is connected to both radial sides with lifting ropes 703. The end of the lifting rope 703 is provided with an elastic winding part 704. The elastic winding part 704 is connected to the top side of the counterweight part connected to the inner cavity of the first float 1. The elastic winding part 704 includes a rewind bearing, which is used to rewind the lifting rope 703 after the counterweight water tank 16 is drained.

[0061] The specific implementation method is as follows: When sampling, water can be drawn from the water body through the pump 701 and sent into the counterweight tank 16. As the water in the counterweight tank 16 gradually increases, the counterweight tank 16 can slide downward through the bottom opening of the first float 1. The counterweight tank 16 can drive the bottom inlet seat 6 and the disturbance turbine 8 to move downward. Thus, by controlling the amount of water in the counterweight tank 16, the inlet depth of the inlet seat 6 in the water body can be controlled, which is beneficial for graded sampling at different water depths and further improves the sampling accuracy and sampling effect.

[0062] Furthermore, the movement of the liquid inlet seat 6 can pull the corrugated pipe 10 connected at the top to unfold, which is beneficial to adapt to the change of sampling depth through the unfolded corrugated pipe 10. When the corrugated pipe 10 is unfolded, the sampling pump 14 can draw liquid from the sampling valve pipe 12, the connecting bend pipe 11, and the corrugated pipe 10. Under the extraction action of the sampling pump 14, the fluid can be sent into the sample storage mechanism 4 through the bottom connecting pipe 13 of the sampling valve pipe 12.

[0063] During the floating process of the first float 1 and the second float 2, the liquid inlet seat 6 can fully mix the water near the water body by rotating the disturbance turbine 8 inside the liquid inlet seat 6. After the water is mixed, it can be drawn into the bellows 10 through the inner opening cup of the liquid inlet seat 6. The uniformity of liquid intake is improved by the autonomous rotation of the disturbance turbine 8 during the floating process.

[0064] Please see Figure 6-8 The sample storage mechanism 4 includes a sample storage tray 401, which is rotatably connected to the inner side of the support frame 17. The top of the sample storage tray 401 has multiple placement holes, and a sample storage tube 402 is inserted into each placement hole. A connecting plate 403 is connected to the inner side of the sample storage tray 401. A first driving ring 404 is connected to the bottom of the connecting plate 403. A placement ring 408 is rotatably connected to the bottom side of the first driving ring 404. Both sides of the bottom of the placement ring 408 are connected to a support plate 407 through a first electric push rod 406. The support plate 407 is connected to one side of the inner cavity of the support frame 17. A driving part 405 is driven to one side of the first driving ring 404. The driving part 405 is connected to the top of the placement ring 408.

[0065] Another support is vertically arranged on one side of the support plate 407. A connecting frame 15 is connected to the top of the support, and the connecting frame 15 is connected to the outside of the sampling pump 14.

[0066] In this embodiment, the drive unit 405 may be a gear motor that performs gear transmission with the first drive ring 404.

[0067] The specific implementation method is as follows: When sampling, the liquid pump 701 draws water from the liquid inlet seat 6 through the connecting bend 11 and the corrugated pipe 10, and then sends it into the sample storage tube 402 through the bottom connecting pipe 13 of the sampling valve pipe 12. After sampling of a single sample storage tube 402 is completed, the first electric push rod 406 is shortened. After the telescopic part of the first electric push rod 406 moves to the bottom fixed part, it can pull the sample storage plate 401 downward, causing the sample storage tube 402 to separate from the connecting pipe 13. At this time, the drive unit 405 works to drive the first drive ring 404 to rotate. The rotation of the first drive ring 404 can drive the connecting plate 40 3. The sample storage tray 401 rotates, which drives another sample storage tube 402 to rotate to the bottom side of the sampling valve tube 12 and the connecting tube 13. At this time, the first electric push rod 406 extends and drives the sample storage tray 401 and the sample storage tube 402 to reset upward and nest with the connecting tube 13. This is beneficial for storing and replacing multiple circumferentially arranged sample storage tubes 402 through the rotatable sample storage tray 401, for classifying and storing graded samples during floating sampling, and for judging the water pollution situation at different nodes in the watershed by analyzing different samples.

[0068] Please see Figure 6-7 and Figure 9 A liquid dispensing and pushing mechanism 5 is connected to the bottom side of the support frame 17. The liquid dispensing and pushing mechanism 5 includes an outer fixing ring 501. An inner fixing ring 504 is connected to the inner periphery of the outer fixing ring 501 through multiple liquid inlet pipes 502 arranged around the axis. The outer periphery of the outer fixing ring 501 extends to the bottom of the support frame 17 through a liquid outlet pipe 503 and is connected to a liquid drain guide pipe 507 connected to the outer edge of the bottom of the support frame 17. Liquid inlets are opened on the inner sidewall of the inner fixing ring 504 at corresponding positions of the liquid inlet pipes 502. A liquid supply ring 505 is rotatably connected to the inner side of the inner fixed ring 504. The inner side of the liquid supply ring 505 is connected to one side of the outer wall of the corrugated pipe 10 through a pump pipe 506. A pump body is installed on the inner side of the corrugated pipe 10 via the pump pipe 506. A liquid supply port corresponding to the liquid inlet is opened on the outer side of the liquid supply ring 505. A second drive ring 508 is connected to the inner side of the liquid supply ring 505. The second drive ring 508 is connected to the bottom side of the support frame 17 and is used to control the connection between the liquid supply port and the liquid inlet of the liquid supply ring 505 through the second drive ring 508.

[0069] Specifically, when the first float 1 is floating, and when the first float 1 and the second float 2 are stuck between or to one side of a water obstacle, after the stuck position is observed by a gyroscope or monitoring camera, the second drive ring 508 can be remotely controlled to rotate, which in turn drives the liquid supply ring 505 to rotate. The rotation of the liquid supply ring 505 can connect the liquid supply port with the corresponding liquid inlet. At this time, the pump can draw water from the bellows 10 and pump it into the drain guide pipe 507 through the liquid inlet pipe 502 and the liquid outlet pipe 503. Thus, by draining the liquid from the same side of the stuck position, the first float 1 can be removed from the interference position by the reaction force, which is beneficial to improving the drift stability in the water body and improving the sampling effect of the water body.

[0070] Furthermore, through the multiple stabilizing airbags 3 arranged around the periphery, the stabilizing airbags 3 can prevent the first float 1 and the second float 2 from overturning. In the event of a collision, the stabilizing airbags 3 can absorb the impact force of the collision. In the event of a unilateral collision, the outer flexible ring 9 can guide the collision to the stabilizing airbags 3 around the periphery. This is beneficial for reducing the interference of obstacles during operation by using the elastic collapse of the first float 1 driven by the stabilizing airbags 3.

[0071] Working principle: When sampling pollutants in the water environment, the first float 1 and the second float 2 are placed on the surface of the water. When the first float 1 is placed on the surface of the water, it floats and moves with the movement of the water. The water is drawn from the water body through the pump 701 and sent into the counterweight tank 16. As the water in the counterweight tank 16 gradually increases, the counterweight tank 16 slides downward through the bottom opening of the first float 1. The counterweight tank 16 drives the bottom inlet seat 6 and the disturbance turbine 8 to move downward. By controlling the amount of water in the counterweight tank 16, the inlet depth of the inlet seat 6 in the water body is controlled. After the inlet seat 6 moves and pulls the corrugated pipe 10 connected at the top to unfold, the sampling pump 14 draws liquid from the sampling valve pipe 12, the connecting bend pipe 11 and the corrugated pipe 10. The fluid is drawn into the sample storage mechanism 4 through the bottom connecting pipe 13 of the sampling valve pipe 12 under the action of the sampling pump 14.

[0072] The pump 701 draws water from the inlet seat 6 through the connecting bend 11 and the corrugated pipe 10, and then sends it into the sample storage tube 402 through the bottom connecting pipe 13 of the sampling valve pipe 12. After sampling is completed in a single sample storage tube 402, the first electric push rod 406 shortens. The telescopic part of the first electric push rod 406 moves to the bottom fixed part and pulls the sample storage plate 401 downward, causing the sample storage tube 402 to separate from the connecting pipe 13. The drive unit 405 drives the first drive ring 404 to rotate. The rotation of the first drive ring 404 causes the connecting plate 403 and the sample storage plate 401 to rotate. The rotation of the sample storage plate 401 causes another sample storage tube 402 to rotate to the bottom of the sampling valve pipe 12 and the connecting pipe 13. The first electric push rod 406 extends and causes the sample storage plate 401 and the sample storage tube 402 to return to their original position and nest with the connecting pipe 13. The rotatable sample storage plate 401 is used to store and replace multiple sample storage tubes 402 arranged in the circumferential direction.

[0073] When the first float 1 and the second float 2 are stuck between or to one side of a water obstacle, the remote control controls the second drive ring 508 to rotate, which drives the supply ring 505 to rotate. The rotation of the supply ring 505 drives the supply port to connect with the corresponding inlet port. The pump body draws water from the bellows 10 and pumps it into the drainage guide pipe 507 through the inlet pipe 502 and the outlet pipe 503. After draining the liquid from the same side of the stuck position, the reaction force causes the first float 1 to move away from the interference position.

[0074] This invention also provides a pollutant sampling method for water environment engineering testing, implemented based on the above-mentioned device, the method comprising the following steps:

[0075] S1: Device Deployment and Stability

[0076] When the device is deployed to the target water area, the first float 1 and the second float 2 float on the water surface; the stabilizing airbag 3 on the outer periphery of the support frame 17 is inflated and deployed, and the outer flexible ring 9 surrounds the outer periphery of the stabilizing airbag 3. Through the buoyancy of the stabilizing airbag 3 and the circumferential constraint of the outer flexible ring 9, the device is kept floating stably, avoiding water flow disturbance that could cause it to capsize or deviate.

[0077] S2: Sampling depth adjustment

[0078] The weight of the counterweight tank 16 is adjusted by the depth control mechanism 7, which drives the liquid inlet seat 6 to move to the target depth.

[0079] Weight increase and sinking: Start the liquid pump 701 to draw water from the bellows 10 and inject it into the counterweight tank 16. The weight of the counterweight tank 16 increases and slides down along the bottom opening of the first float 1, which drives the liquid inlet seat 6 to move down synchronously, and the bellows 10 extends down accordingly.

[0080] Weight reduction and floating: Start the liquid pump 701 to pump water in reverse, and discharge the water in the counterweight water tank 16 to the bellows 10 or the water area. The weight of the counterweight water tank 16 is reduced, and the elastic winding part 704 pulls the hoisting rope 703 through the rewind bearing, which drives the counterweight water tank 16 and the liquid inlet seat 6 to reset upward.

[0081] Depth locking: After the liquid inlet seat 6 reaches the target depth, the liquid pump 701 is stopped, the weight of the counterweight water tank 16 remains stable, and the liquid inlet seat 6 maintains the current sampling depth;

[0082] S3: Water Sampling and Mixing

[0083] Start sampling pump 14 to extract water samples at the target depth:

[0084] The sampling pump 14 generates negative pressure through the sampling valve pipe 12, the connecting bend pipe 11 and the bellows pipe 10, and the liquid inlet trough of the liquid inlet seat 6 draws in water sample.

[0085] During the liquid inlet process, the water flow drives the disturbance turbine 8 to rotate around the pipe pile, disturbing the water around the liquid inlet seat 6, so that the water sample is evenly mixed and then enters the corrugated pipe 10.

[0086] The mixed water sample enters the sampling pump 14 sequentially through the corrugated pipe 10, the connecting bend 11, and the sampling valve pipe 12.

[0087] S4: Water Sample Storage and Switching

[0088] Sampling pump 14 delivers water samples to sample storage unit 4 via connecting pipe 13.

[0089] Single sample storage: The drive unit 405 drives the first drive ring 404 to rotate, which in turn drives the sample storage plate 401 to rotate, so that a sample storage tube 402 is aligned with the liquid outlet of the connecting tube 13, and the water sample is injected into the sample storage tube 402.

[0090] Multiple sample switching: After a single water sample is stored, the first electric push rod 406 retracts, causing the sample storage tray 401 to move downwards, and the sample storage tube 402 to separate from the connecting tube 13; the drive unit 405 drives the sample storage tray 401 to rotate again, so that the next sample storage tube 402 is aligned with the connecting tube 13; the first electric push rod 406 extends, the sample storage tube 402 moves upwards to reset and connects with the connecting tube 13, and the water sample injection steps are repeated to achieve independent storage of multiple water samples.

[0091] This invention has the following features and effects:

[0092] 1. Improved floating stability: By using the stabilizing airbags and flexible rings arranged around the outer perimeter of the support frame, the buoyancy of the airbags and the circumferential constraint of the flexible rings effectively resist water flow disturbances, prevent the device from overturning or shifting, and solve the problem of interference in complex waters by traditional sampling devices.

[0093] 2. Achieve graded depth sampling: By adjusting the weight of the counterweight water tank through the depth control mechanism, the liquid inlet seat is driven to slide vertically. Combined with the extensibility and adaptability of the corrugated pipe, the sampling depth can be precisely controlled, breaking through the limitations of traditional single-depth sampling and improving the comprehensiveness of water pollution monitoring.

[0094] 3. Optimize water sample collection efficiency: The sample storage mechanism, together with a rotatable sample tray and multiple sets of sample tubes, enables the classified storage of water samples from different depths and water areas without the need for manual container replacement, thus improving the continuity and convenience of interval sampling during the floating process.

[0095] 4. Enhanced obstacle avoidance capability: The arc-shaped crumple groove on the inner side of the outer flexible ring can absorb collision energy, and with the buffering effect of the stabilizing airbag, it reduces the impact of obstacles on the device; combined with the reaction force control of the liquid dispensing and pushing mechanism, it can remotely drive the device to get out of the stuck position and adapt to multi-obstacle water environment.

[0096] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0097] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pollutant sampling device for water environment engineering testing, comprising a first float (1) and a second float (2), wherein the opposing surfaces of the first float (1) and the second float (2) are fixedly connected by a support frame (17), characterized in that, The support frame (17) has multiple stabilizing airbags (3) arranged in a circular array along the axis on its outer periphery, and an outer flexible ring (9) is connected between the outer sides of the multiple stabilizing airbags (3). The support frame (17) is equipped with a sample storage mechanism (4) in its inner cavity. The sample storage mechanism (4) is located inside the second float (2). A sampling pump (14) for drawing liquid is installed on the top of the sample storage mechanism (4). A sampling valve pipe (12) is connected to the outlet of the sampling pump (14). A connecting pipe (13) for discharging liquid is connected to the bottom side of the sampling valve pipe (12). A corrugated pipe (10) is connected to one end of the inlet of the sampling valve pipe (12) through a connecting bend pipe (11). The other end of the corrugated pipe (10) is connected to an inlet seat (6). The first float (1) has an opening on its bottom side, and a counterweight water tank (16) is slidably connected in the vertical direction inside the opening. A depth control mechanism (7) is connected to the top of the counterweight water tank (16). The depth control mechanism (7) is connected inside the first float (1) and is used to drive the counterweight water tank (16) to slide up and down along the opening. The liquid inlet seat (6) is connected to the bottom side of the counterweight water tank (16) and is used to adjust the sampling depth of the liquid inlet seat (6) by adjusting the weight of the counterweight water tank (16) to drive the liquid inlet seat (6) to move synchronously.

2. The pollutant sampling device for water environment engineering testing according to claim 1, characterized in that, The liquid inlet seat (6) includes a pipe pile part and stepped parts respectively provided on the upper and lower sides of the pipe pile part. The stepped parts on both sides form a gap. Multiple liquid inlet grooves are opened on the side walls along the radial direction on the opposite surfaces of the stepped parts on both sides. The liquid inlet seat (6) is rotatably connected to the outside of the pipe pile part. The disturbing turbine (8) can rotate around the axis of the pipe pile part.

3. The pollutant sampling device for water environment engineering testing according to claim 1, characterized in that, The depth control mechanism (7) includes a fixed cover plate (702) connected to the top of the counterweight water tank (16). The bottom side of the counterweight water tank (16) has a through hole for the corrugated pipe (10) to pass through. The corrugated pipe (10) passes through the through hole and can move up and down with the counterweight water tank (16). The top of the fixed cover plate (702) is connected to a liquid pump (701) through a pipe. The pipes on both sides of the liquid pump (701) extend to the bottom side of the inner cavity of the counterweight water tank (16) and the corrugated pipe (10), respectively, for injecting water from the corrugated pipe (10) into the counterweight water tank (16) to increase its weight, or for draining water from the counterweight water tank (16) to reduce its weight, thereby adjusting the overall weight of the counterweight water tank (16).

4. The pollutant sampling device for water environment engineering testing according to claim 3, characterized in that, The top radial sides of the fixed cover plate (702) are connected to hoisting ropes (703). The end of the hoisting rope (703) is provided with an elastic winding part (704). The elastic winding part (704) is connected to the top side of the counterweight part connected to the inner cavity of the first float (1). The elastic winding part (704) includes a rewind bearing. After the counterweight water tank (16) is drained and its weight is reduced, the rewinding force of the rewind bearing drives the hoisting rope (703) to wind, thereby pulling the counterweight water tank (16) upward to reset.

5. A pollutant sampling device for water environment engineering testing according to claim 1, characterized in that, The sample storage mechanism (4) includes a sample storage tray (401), which is rotatably connected to the inner side of the support frame (17). The top of the sample storage tray (401) has multiple placement holes, and a sample tube (402) is detachably secured in each placement hole. A connecting plate (403) is connected to the inner side of the sample storage tray (401), and a first driving ring (404) is connected to the bottom of the connecting plate (403). A placement ring (402) is rotatably connected to the bottom side of the first driving ring (404). 408), both sides of the bottom of the placement ring (408) are connected to support plates (407) via first electric push rods (406). The support plates (407) are connected to one side of the inner cavity of the support frame (17). The first drive ring (404) is connected to a drive unit (405) on one side. The drive unit (405) is connected to the top of the placement ring (408) and is used to drive the first drive ring (404) to rotate, so as to drive the connecting plate (403) and the sample storage plate (401) to rotate synchronously.

6. A pollutant sampling device for water environment engineering testing according to claim 5, characterized in that, The support plate (407) extends vertically upward on one side to form a vertical support part, and a connecting frame (15) is connected to the top of the vertical support part. The connecting frame (15) is connected to the outside of the sampling pump (14).

7. A pollutant sampling device for water environment engineering testing according to claim 1, characterized in that, The bottom side of the support frame (17) is connected to a liquid dispensing and pushing mechanism (5). The liquid dispensing and pushing mechanism (5) includes an outer fixing ring (501). The inner periphery of the outer fixing ring (501) is connected to an inner fixing ring (504) through multiple liquid inlet pipes (502) arranged around the axis. The outer periphery of the outer fixing ring (501) extends to the bottom of the support frame (17) through a liquid outlet pipe (503) and is connected to a liquid drain guide pipe (507) connected to the outer edge of the bottom of the support frame (17). The inner wall of the inner fixing ring (504) is provided with liquid inlets at corresponding positions of the liquid inlet pipes (502). The inner side of the inner fixing ring (504) rotates. A liquid supply ring (505) is connected to the inner side of the corrugated pipe (10) via a pump pipe (506). The pump pipe (506) is located inside the corrugated pipe (10) and a pump body is installed thereon. A liquid supply port corresponding to the liquid inlet is opened on the outer side of the liquid supply ring (505). A second drive ring (508) is connected to the inner side of the liquid supply ring (505). The second drive ring (508) is connected to the bottom side of the support frame (17) and is used to drive the liquid supply ring (505) to rotate around the axis of the inner fixed ring (504) to adjust the communication state between the liquid supply port of the liquid supply ring (505) and the liquid inlet of the inner fixed ring (504).

8. A pollutant sampling device for water environment engineering testing according to claim 1, characterized in that, The outer flexible ring (9) is an elastic plastic ring. Multiple arc-shaped collapse grooves are provided on the inner side of the outer flexible ring (9). The arc-shaped collapse grooves are used to absorb impact energy through collapse deformation when the device is subjected to external force impact, so as to protect the stabilizing airbag (3).

9. A method for sampling pollutants for water environment engineering testing, implemented based on the apparatus according to any one of claims 1-8, characterized in that, The method includes the following steps: S1: Device Deployment and Stability The device is deployed to the target water area, and the first float (1) and the second float (2) float on the water surface. The stabilizing airbag (3) on the outer periphery of the support frame (17) is inflated and deployed, and the outer flexible ring (9) surrounds the outer periphery of the stabilizing airbag (3). Through the buoyancy of the stabilizing airbag (3) and the circumferential constraint of the outer flexible ring (9), the device is kept floating stably, avoiding water flow disturbance that could cause it to capsize or deviate. S2: Sampling depth adjustment The weight of the counterweight tank (16) is adjusted by the depth control mechanism (7), driving the inlet seat (6) to move to the target depth: Weight increase and sinking: Start the liquid pump (701) to draw water from the bellows (10) and inject it into the counterweight tank (16). The weight of the counterweight tank (16) increases and slides down along the bottom opening of the first float (1), causing the liquid inlet seat (6) to move down synchronously, and the bellows (10) extends down accordingly. Weight reduction and floating: Start the liquid pump (701) to pump water in reverse, and discharge the water in the counterweight water tank (16) to the corrugated pipe (10) or the water area. The weight of the counterweight water tank (16) is reduced, and the elastic winding part (704) pulls the hoisting rope (703) through the rewind bearing, which drives the counterweight water tank (16) and the liquid inlet seat (6) to reset upward. Depth locking: After the liquid inlet seat (6) reaches the target depth, the liquid pump (701) is stopped, the weight of the counterweight water tank (16) remains stable, and the liquid inlet seat (6) maintains the current sampling depth; S3: Water Sampling and Mixing Start the sampling pump (14) to extract water samples at the target depth: The sampling pump (14) generates negative pressure through the sampling valve pipe (12), connecting bend pipe (11) and bellows pipe (10), and the inlet tank of the inlet seat (6) draws in water sample; During the liquid inlet process, the water flow drives the disturbance turbine (8) to rotate around the pipe pile, disturbing the water around the liquid inlet seat (6) so that the water sample is evenly mixed and then enters the corrugated pipe (10). The mixed water sample enters the sampling pump (14) sequentially through the corrugated pipe (10), the connecting bend (11), and the sampling valve pipe (12). S4: Water Sample Storage and Switching The sampling pump (14) delivers the water sample to the sample storage unit (4) through the connecting pipe (13): Single sample storage: The drive unit (405) drives the first drive ring (404) to rotate, which in turn drives the sample storage plate (401) to rotate, so that a sample storage tube (402) is aligned with the outlet of the connecting tube (13), and the water sample is injected into the sample storage tube (402). Multiple sample switching: After a single water sample is stored, the first electric push rod (406) retracts, causing the sample storage tray (401) to move down, and the sample storage tube (402) to separate from the connecting tube (13); the drive unit (405) drives the sample storage tray (401) to rotate again, so that the next sample storage tube (402) is aligned with the connecting tube (13); the first electric push rod (406) extends, the sample storage tube (402) moves up to reset and connects with the connecting tube (13), and the water sample injection steps are repeated to realize the independent storage of multiple water samples.

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