Sampling device for water conservancy project investigation

Abstract

The invention relates to the technical field of water pollution detection sampling, and discloses a sampling device for water conservancy project investigation, the sampling device comprises a rope releasing device and a floating body, the rope releasing device is connected with a lifting rope, and the lower end of the lifting rope is connected with a sampler; the rope releasing device comprises a plurality of layers of rope clamping devices and a plurality of first limiting pieces for releasing the rope clamping devices layer by layer, and the positions of the rope clamping devices are adjusted along the lifting rope; the sampler comprises an annular sampling shell and a guide pipe penetrating through the center of the sampling shell in a sliding mode, a plurality of layers of sampling cavities are formed in the sampling shell, an elastic piece is connected between the upper side of the sampling shell and the upper end of the guide pipe, and a plurality of layers of water inlets corresponding to the sampling cavities respectively are formed in the annular side wall of the center of the sampling shell. A second limiting piece for limiting the sampling shell layer by layer is arranged in the middle of the guide pipe; the rope releasing device releases the rope clamping device layer by layer so that the sampler can be located at different depths, and multi-depth sampling can be conducted at a time; the position of the rope gripper is adjustable, so that the sampling depth is adjustable; the elastic piece enables the sampling shell to descend layer by layer along the guide pipe to achieve center water inlet sampling at different depths.

Description

Technical Field

[0001] This invention relates to the field of water pollution detection and sampling technology, specifically to a sampling device for water conservancy engineering surveys. Background Technology

[0002] Water conservancy project surveying is a crucial step in providing basic geological and hydrological data for the planning, design, construction, and operation of water conservancy projects, directly determining the safety and economy of the projects. One of its core tasks is hydrological surveying, which collects and analyzes data on precipitation, runoff, water pollution, and water quality within the watershed to determine the project's design parameters for flood control, water supply, and other aspects.

[0003] Water pollution sampling is a crucial step in determining the authenticity and validity of subsequent testing data. Its quality directly impacts the scientific rigor of water pollution assessment, remediation decisions, and environmental management, making it irreplaceable. Standardized sampling accurately captures the pollution status of water bodies at specific times and locations, avoiding data distortion due to sampling biases. This provides a reliable basis for determining the type and extent of pollution. Systematic sampling allows for tracing pollution sources, supporting the development and optimization of pollution prevention and control plans. It also provides critical data support for water environment quality assessment, ecological risk early warning, and the implementation of water resource protection policies, ultimately ensuring water safety and the stability of the aquatic ecosystem.

[0004] There are various water sampling devices on the market, used to collect representative water samples from different water bodies. Their core function is to perform fixed-point, quantitative, or timed sampling while avoiding cross-contamination and ensuring the water sample's physicochemical properties are consistent with the original water body. When sampling at different depths in a water body, markers need to be placed at corresponding positions on the suspension rope. Sampling is performed by lowering the markers into the water until they float to the surface. Only one sampling can be completed at a time, and multiple repetitions are required for sampling at different depths. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art mentioned above and to provide a sampling device for water conservancy engineering survey.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A sampling device for water conservancy engineering survey includes a rope release device and a float supporting the rope release device. The rope release device is connected to a hoisting rope, and the lower end of the hoisting rope is connected to a sampler. A counterweight is connected to the lower side of the sampler. The rope release device includes several layers of rope clamps and several first limiting members that release the rope clamps layer by layer. The position of the rope clamps is adjusted along the hoisting rope. The sampler includes an annular sampling shell and a conduit that slides through the center of the sampling shell. The sampling shell has several layers of sampling cavities. An elastic member that lowers the sampling shell is connected between the upper side of the sampling shell and the upper end of the conduit. The central annular sidewall of the sampling shell has several layers of inlets corresponding to each sampling cavity. A water inlet is provided in the middle of the conduit. A second limiting member that limits the sampling shell layer by layer is provided in the middle of the conduit.

[0007] Furthermore, the float is an annular hollow shell structure, and the rope release device includes a rope release shell connected to the upper side of the float, with an opening on the lower side of the rope release shell corresponding to the center of the float.

[0008] Furthermore, the first limiting member is an automatic telescopic rod, which is arranged in several layers vertically along the rope release shell, and the telescopic end of the first limiting member is supported on the lower side of the rope clamp.

[0009] Furthermore, the rope clamp includes a rope clamping plate, which comprises a circular plate, an inner tube, and an outer tube, with the inner tube and outer tube respectively disposed on the upper and lower sides of the circular plate.

[0010] Furthermore, the rope clamping plate is divided into two symmetrical parts, and the rope clamping device includes an internally threaded cylinder, which is threaded onto the outside of the inner tube and extends into the outer tube of the adjacent upper rope clamping device.

[0011] Furthermore, the hoisting rope passes upward through the rope clamp, bends downward to fit against the outside of the internal threaded cylinder, reaches the lower part of the internal threaded cylinder, and spirals upward around the outside of the internal threaded cylinder. The outer tube provides an outer ring-side limit for the hoisting rope on the outside of the internal threaded cylinder.

[0012] Furthermore, the top inner side of the rope release device is provided with a secondary tube into which the inner tube of the top rope clamp extends, and the upper side of the rope release device is provided with a rope winding cylinder for the upper end of the hoisting rope to be wound.

[0013] Furthermore, the sampling shell has several layers of horizontal partitions separating the sampling chambers on its inner side; the sampling shell has several layers of inner rings on its central ring side, and a sealing ring is provided between the inner rings and the conduit.

[0014] Furthermore, the outer side of the conduit and the sampling shell are divided by an inner ring into several vertically arranged water guiding cavities and sealing cavities. The water guiding cavities and sealing cavities are alternately distributed, and each sampling cavity corresponds to one water guiding cavity and one sealing cavity. The water inlet is provided between the sampling cavity and the corresponding water guiding cavity.

[0015] Furthermore, the second limiting member is an automatic telescopic rod, and the telescopic end of the second limiting member is supported on the lower side of the inner ring. The second limiting member and the water inlet simultaneously correspond to the water guiding cavity or the sealing cavity.

[0016] Furthermore, a level gauge is provided in the sampling chamber. After the sampling chamber is full of water, the second limiting member retracts and then extends, causing the sampling shell to move down to the sealing cavity corresponding to the water inlet of the sampling chamber. The first limiting member releases a rope clamp, and the second limiting member retracts and then extends, causing the sampling shell to move down to the water guide cavity corresponding to the water inlet of the upper sampling chamber.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention releases the rope clamp layer by layer, so that the sampler is located at different depths, and samples at multiple depths in a single operation; the position of the rope clamp is adjustable, so the sampling depth is adjustable; the elastic element causes the sampling shell to descend layer by layer along the guide tube, so that the water inlet of the guide tube corresponds to the water inlet of different sampling chambers in sequence, realizing central water inlet sampling at different depths, while the guide tube seals the water inlet of other sampling chambers, reducing cross-mixing of water samples at different depths; This invention uses a rope clamping plate formed by two symmetrical parts. The rope clamping needles can firmly clamp the suspension rope, and the position of the rope clamping plate on the suspension rope can be easily changed, thereby adjusting the spacing of the rope clamps to achieve rope release at different depths. The internal threaded cylinder and tapered thread structure can achieve quick clamping and fixing of the suspension rope by the rope clamping plate. This invention involves wrapping the lifting rope around the outside of the internally threaded cylinder. The outer tube limits the wrapped lifting rope to prevent it from becoming loose, keeping the unreleased lifting rope in the rope release device stable. During the rope release process, the lifting rope itself is prevented from tangling and knotting, ensuring that the sampler falls to the accurate depth. This invention achieves a seal between the conduit and the sampling shell through an inner ring and a sealing ring, preventing water samples from being contaminated and mixed by water from different depths. At the same time, the sealing ring and the conduit form frictional damping, reducing the speed at which the elastic element releases energy and ensuring that the sampling shell moves smoothly along the conduit. Each sampling chamber corresponds to a water guiding chamber and a sealing chamber. When the sampler descends, the sealing chamber corresponds to the water inlet of the sampling chamber, and at the sampling depth, the sampling chamber aligns with the water guiding chamber to achieve water intake and sampling. This avoids mixing with water from different depths and ensures sampling at a fixed depth. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of the rope release device and float of the present invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the rope release device of the present invention.

[0021] Figure 4This is a schematic diagram of the internal structure of the sampler of the present invention.

[0022] Figure 5 This is a three-dimensional schematic diagram of the rope-releasing shell from the upper side of the present invention.

[0023] Figure 6 This is a three-dimensional schematic diagram of the rope-releasing shell from the lower side of the present invention.

[0024] Figure 7 This is a three-dimensional schematic diagram of the rope clamp of the present invention.

[0025] Figure 8 This is a schematic diagram of the rope clamping device of the present invention exploding.

[0026] Figure 9 This is a three-dimensional schematic diagram of the sampling shell of the present invention.

[0027] Figure 10 This is a three-dimensional schematic diagram of the inside of the sampling shell of the present invention.

[0028] Figure 11 This is a schematic diagram of the catheter connection structure of the present invention.

[0029] Figure 12 This is an exploded view of the conduit connection structure of the present invention.

[0030] In the diagram: 1. Rope release device; 2. Float; 3. Suspension rope; 4. Sampler; 5. Counterweight; 6. Bottom rope; 7. Rope release shell; 8. Rope clamp; 9. First limiting component; 10. Rope clamping plate; 11. Circular plate; 12. Inner tube; 13. Rope clamping needle; 14. Outer tube; 15. Positioning post; 16. Positioning hole; 17. Internal threaded cylinder; 18. Rope winding cylinder; 19. Secondary tube; 20. Sampling shell; 21. Partition plate; 22. Water outlet; 23. Inner ring; 24. Sealing ring; 25. Guide tube; 26. End plate; 27. Elastic component; 28. Level gauge; 29. ​​Water guiding cavity; 30. Sealing cavity; 31. Water inlet; 32. Water outlet; 33. Second limiting component; 34. Cross; 35. Inner plane. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention; that is, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Specific embodiments of the sampling device for water conservancy engineering survey provided by the present invention: Please refer to the attached document. Figures 1-12A sampling device for water conservancy engineering survey includes a rope releaser 1 and a float 2 supporting the rope releaser 1. The rope releaser 1 is connected to a hoisting rope 3. The lower end of the hoisting rope 3 is connected to a sampler 4. A counterweight 5 is connected to the lower side of the sampler 4. The counterweight 5 is connected to the lower side of the sampler 4 through a bottom rope 6.

[0033] The counterweight 5 allows the hollow sampler 4 to overcome the buoyancy of the water and move downwards into the water body. The weight of the counterweight 5 is greater than the buoyancy of the empty sampler 4 when it is fully submerged in water. The volume of the float 2 is larger than that of the sampler 4. The float 2 provides greater buoyancy to keep the rope release device 1 above the water surface, preventing the device from being completely submerged in water.

[0034] The float 2 is an annular hollow shell structure. The rope release device 1 includes a rope release shell 7, which is connected to the upper side of the float 2. The float 2 has a through hole in the center, and the rope release shell 7 has an opening on the lower side corresponding to the center of the float 2. The rope release shell 7 is a cylindrical structure with a horizontal top wall at the upper end.

[0035] The rope release device 1 includes several layers of rope clamps 8 and several first limiting members 9 that release the rope clamps 8 layer by layer. The rope clamps 8 are stacked vertically inside the rope release shell 7. The first limiting member 9 is an automatic telescopic rod, which is arranged in several layers along the rope release shell 7. The telescopic end of the first limiting member 9 is supported on the lower side of the rope clamps 8.

[0036] At least two first limiting members 9 are provided on each layer. The two first limiting members 9 are symmetrically located on the lower side of both ends of the rope clamp 8. When the telescopic end of the first limiting member 9 extends, it supports the lower side of the rope clamp 8 to prevent the rope clamp 8 from falling. When the telescopic end of the first limiting member 9 retracts, the rope clamp 8 is not restricted from the lower side, and the sampler 4 and the hanging rope 3 fall and bring the rope clamp 8 out of the rope release shell 7.

[0037] The first limiting member 9 of each layer operates synchronously, causing the rope clamps 8 to fall from the rope release shell 7 layer by layer from bottom to top. The position of the rope clamps 8 is adjustable along the suspension rope 3, that is, the distance between adjacent rope clamps 8 can be adjusted. The length of the suspension rope 3 between the top rope clamp 8 and the top wall of the rope release shell 7 can be adjusted, so that the length of each section of suspension rope 3 can be adjusted, thereby enabling multiple rope releases at different depths, so that the sampler 4 is located at different depths in the water body, which facilitates the sampler 4 to extract water samples at different depths in the water body.

[0038] The rope clamp 8 includes a rope clamping plate 10, which comprises a circular plate 11, an inner tube 12, and an outer tube 14. The inner tube 12 and the outer tube 14 are respectively provided on the upper and lower sides of the circular plate 11. The circular plate 11 has a through hole in its center for the suspension rope 3 to pass through. The vertical centers of the circular plate 11, the inner tube 12, and the outer tube 14 are located on the same vertical line, that is, the inner tube 12 and the outer tube 14 are both aligned with the center of the circular plate 11.

[0039] The suspension rope 3 can pass through the rope clamping plate 10, and the telescopic end of the first limiting member 9 is supported on the lower side of the edge of the circular plate 11. The rope clamping plate 10 has a central vertical cross-section and is divided into two symmetrical parts. The inner tube 12 has several rope clamping needles 13 on the inner side of the two parts. When the inner tube 12 is separated, it can move along the outside of the suspension rope 3 to the required position. After the position of the rope clamp 8 is determined, the two parts of the rope clamping plate 10 are joined together, and the rope clamping needles 13 extend into the inside of the suspension rope 3 to clamp and fix the suspension rope 3, so that the rope clamp 8 cannot move along the position of the suspension rope 3.

[0040] To ensure the accuracy of the docking of the two rope clamping plates 10, the two sections of the inner tube 12 are respectively provided with positioning posts 15 and positioning holes 16. Both the positioning posts 15 and positioning holes 16 are arranged horizontally. After the two sections of the rope clamping plates 10 are docked, the positioning posts 15 extend into the positioning holes 16 to ensure the accurate vertical position of the two sections of the rope clamping plates 10. By using two symmetrical sections of the rope clamping plates 10, the rope clamping needles 13 can firmly clamp the lifting rope 3. The position of the rope clamping plates on the lifting rope 3 can be easily changed, thereby adjusting the spacing of the rope clamps 8 to achieve rope release at different depths.

[0041] The outer side of the inner tube 12 is a tapered annular surface with tapered external threads. The rope clamp 8 includes an internally threaded cylinder 17 with tapered internal threads on its inner side. The internally threaded cylinder 17 is threaded onto the outer side of the inner tube 12 and connected to the inner tube 12, allowing the two parts of the inner tube 12 to be vertically limited. This enables the two parts of the rope clamping plate 10 to be docked and fixed, preventing them from separating. The tapered threads ensure the stability of the connection, and the internally threaded cylinder 17 requires fewer rotations for loading and unloading, allowing for quick loading and unloading. This facilitates the rapid adjustment of the position of the rope clamp 8 on the lifting rope 3.

[0042] Existing technologies for water sampling devices at different depths often employ a horizontally positioned drum structure to wind up the rope, but this makes it difficult to adjust and calibrate the rope length for each sampling. This embodiment achieves precise, multi-point sampling at a fixed depth by releasing the rope clamps 8 one by one and adjusting the length of the suspension rope 3 between the clamps 8. The advantage of using a drum to wind up the rope is that the rope is wound more neatly, avoiding tangling. If the suspension rope 3 in this embodiment is loosely clamped between stacked adjacent rope clamps 8, the rope 3 is prone to tangling. During the release of the clamps 8 and the unfolding of the suspension rope 3, the rope 3 is prone to knotting, preventing proper unwinding and release. Consequently, the sampler 4 cannot reach the predetermined depth, affecting the accuracy of the fixed-depth sampling.

[0043] Based on the above problems, in this embodiment, the internally threaded cylinder 17 extends into the outer tube 14 of the adjacent upper rope clamp 8. When the rope clamp 8 is located inside the rope release shell 7 and is not released, the state is as follows: the lifting rope 3 passes through the outer tube 14 from bottom to top, passes through the rope clamp 8 upwards, bends downwards and fits against the outside of the internally threaded cylinder 17, reaches the lower part of the internally threaded cylinder 17, and then spirals upwards around the outside of the internally threaded cylinder 17. The outer tube 14 provides an outer ring side limit for the lifting rope 3 on the outside of the internally threaded cylinder 17.

[0044] The lifting rope 3 is wound around the outside of the internal threaded cylinder 17. The outer tube 14 forms an external limit on the wound lifting rope 3 to prevent the lifting rope 3 from loosening. This keeps the lifting rope 3 that has not been released inside the rope release shell 7 in a stable state, effectively preventing the lifting rope 3 from getting tangled and knotted during the rope release process, and ensuring that the sampler 4 falls to the accurate depth.

[0045] The rope 3 wound around the outer side of the inner threaded cylinder 17 of the top rope clamp 8 also needs to be externally limited. However, there is no rope clamp 8 on the upper side of the top rope clamp 8. Therefore, in this embodiment, the inner side of the top of the rope release shell 7 is provided with a secondary tube 19 for the inner tube 12 of the top rope clamp 8 and the inner threaded cylinder 17 to extend into. The secondary tube 19 forms an external limit on the rope 3 wound around the upper outer side of the top rope clamp 8 to prevent the rope 3 from becoming loose.

[0046] The top of the rope release shell 7 has a through hole for excess rope 3 to pass through; the upper side of the rope release shell 7 has a rope winding cylinder 18 for the upper end of the rope 3 to be wound. After the excess rope 3 passes through the top wall of the rope release shell 7, it is wound and tied to the outside of the rope winding cylinder 18 to fix the top of the rope 3. It should be noted that the rope 3 between the fixed part of the top of the rope 3 and the top rope clamp 8 needs to be of the set length so that the sampler 4 can finally descend to the set depth.

[0047] The sampler 4 includes an annular sampling shell 20 and a conduit 25 that slides through the center of the sampling shell 20. The sampling shell 20 has several sampling chambers. An elastic element 27 is connected between the upper side of the sampling shell 20 and the upper end of the conduit 25 to lower the sampling shell 20. The elastic element 27 is a conical spring, which can be compressed to a small thickness, facilitating the compactness and small size of the device. The central annular sidewall of the sampling shell 20 has several layers of inlets 31 corresponding to each sampling chamber. The conduit 25 has a water inlet 32 ​​in the middle and a second limiting element 33 in the middle of the conduit 25 that limits the sampling shell 20 layer by layer.

[0048] The rope release device 1 releases the rope clamp 8 layer by layer, so that the sampler 4 is located at different depths, and multiple depths are sampled at a single time; the position of the rope clamp 8 is adjustable so that the sampling depth is adjustable; the elastic element 27 causes the sampling shell 20 to descend layer by layer along the guide tube 25, so that the water inlet 32 ​​of the guide tube 25 corresponds to the water inlet 31 of different sampling chambers in sequence, so as to realize the central water inlet sampling at different depths. At the same time, the guide tube 25 seals the water inlet 31 of other sampling chambers, reducing the cross-mixing of water samples at different depths.

[0049] The sampling shell 20 has several horizontal partitions 21 on its inner side that separate the sampling chambers; the sampling shell 20 has several inner rings 23 on its central ring side, and a sealing ring 24 is provided between the inner rings 23 and the conduit 25. Several water taps 22 are connected to the outer side of the sampling shell 20, and each water tap 22 corresponds to a sampling chamber. The water tap 22 is positioned at the bottom of the sampling chamber so that the water sample in the sampling chamber can be completely released. The water sample is taken out from the sampling shell 20 by opening the water tap 22.

[0050] The outer side of the conduit 25 and the sampling shell 20 are divided by the inner ring 23 into several vertically arranged water-guiding chambers 29 and sealing chambers 30. The water-guiding chambers 29 and sealing chambers 30 are alternately distributed, with each sampling chamber corresponding to one water-guiding chamber 29 and one sealing chamber 30. The sampling chamber is provided with the aforementioned water inlet 31 on the central ring sidewall of the water-guiding chamber 29. For the same sampling chamber, the water-guiding chamber 29 is lower and the sealing chamber 30 is upper, so that when the water-guiding chamber 29 corresponds to the water inlet 32, water is sampled and enters. Afterward, the sampling shell 20 moves down so that the sealing chamber 30 corresponds to the water inlet 32, thus sealing the sampling chamber. During the descent of the sampler 4, it will not be mixed or interfered with by water entering along the way, ensuring sampling at a constant depth.

[0051] The inner ring 23 and the sealing ring 24 seal the conduit 25 and the sampling shell 20, preventing the water sample from being contaminated and mixed by water from different depths. Simultaneously, the sealing ring 24, in contact with the conduit 25, creates frictional damping, reducing the speed at which the elastic element 27 releases energy, ensuring the sampling shell 20 moves smoothly along the conduit 25. This facilitates the accurate insertion of the second limiting element 33 into the water guiding cavity 29 or the sealing cavity 30, achieving cavity-by-cavity limiting. Each sampling cavity corresponds to one water guiding cavity 29 and one sealing cavity 30. As the sampler 4 descends, the sealing cavity 30 corresponds to the water inlet 31 of the sampling cavity, aligning the sampling cavity with the water guiding cavity 29 at the sampling depth to achieve water intake and sampling; preventing the mixing of water from different depths and ensuring sampling at a fixed depth.

[0052] There are four second limiting members 33, evenly distributed along the circumference of the conduit 25, which is a circular tube. The second limiting members 33 are automatic telescopic rods. In this embodiment, the automatic telescopic rods are all electric telescopic rods. The telescopic end of the second limiting member 33 is supported on the lower side of the inner ring 23. The second limiting member 33 is preferably a waterproof electric telescopic rod. The second limiting member 33 and the water inlet 32 ​​correspond to the water guiding cavity 29 or the sealing cavity 30 at the same height, that is, the second limiting member 33 and the water inlet 32 ​​are at the same height or the height of the water inlet 32 ​​is slightly lower than that of the second limiting member 33.

[0053] Both the upper and lower ends of the conduit 25 are bolted to end plates 26. End plates 26 are removable, allowing the sampling shell 20 to be slidably removed and the sealing ring 24 on the inner side of the inner ring 23 to be replaced. An elastic element 27 is located between the upper end plate 26 of the conduit 25 and the upper side of the sampling shell 20. The inner side of the conduit 25 has four protrusions forming four vertical inner planes 35, evenly distributed circumferentially. This facilitates the installation of the second limiting element 33 and the setting of threaded holes at the upper and lower ends of the conduit 25, thereby achieving bolted connection with the end plate 26. In this embodiment, four water inlets 32 are provided, located at the arc of the conduit 25, with the four water inlets 32 and the four second limiting elements 33 evenly distributed circumferentially in alternating patterns.

[0054] Each end plate 26 has a through hole at its center corresponding to the conduit 25, allowing water to enter the conduit 25 and then flow from the water inlet 32 ​​into the water guiding chamber 29 and the sampling chamber. Crosses 34 are provided on the inner sides of the end plates 26 at both the upper and lower ends of the conduit 25. These crosses 34 do not obstruct water flow; the cross at the upper end of the conduit 25 is used to connect to the bottom of the suspension rope 3, and the cross at the lower end of the conduit 25 is used to connect to the upper end of the bottom rope 6.

[0055] Each sampling chamber is equipped with a level gauge 28. After the sampling chamber is full of water, the second limiting member 33 retracts and then extends, causing the sampling shell 20 to move down to the water inlet 31 of the sampling chamber corresponding to the sealing cavity 30. The first limiting member 9 releases a rope clamp 8, and the second limiting member 33 retracts and then extends, causing the sampling shell 20 to move down to the water guide cavity 29 of the upper sampling chamber corresponding to the water inlet 32.

[0056] Sampling process: Before sampling, the telescopic end of the second limiting member 33 extends to the lower side of the sampling shell 20, and the water inlet 32 ​​corresponds to the lower outer side of the sampling shell 20, so that the water cannot enter the interior of the sampling shell 20. When the sampler 4 falls into the water, the telescopic end of the second limiting member 33 retracts and then extends. When it retracts, the elastic member 27 causes the bottom inner ring 23 to pass over the second limiting member 33. When it extends, it enters the bottom water guiding cavity 29. At this time, water passes through the water inlet 32, the bottom water guiding cavity 29, and the water inlet 31 from the conduit 25 and enters the bottom sampling cavity. After the liquid level gauge 28 in the lowest sampling chamber detects that the sampling chamber is full of water, the telescopic end of the second limiting member 33 retracts and then extends, so that the water inlet 32 ​​corresponds to the lowest sealing chamber 30, preventing water from entering the sampling chamber and sealing all sampling chambers. The telescopic end of the first limiting member 9 at the bottom retracts, releasing a rope clamp 8. The sampler 4 descends until the suspension rope 3 is taut (this process can be determined by time, such as setting the descent time to 5-20 seconds based on the length of the suspension rope 3). During this process, the sampling chamber at the bottom is sealed after sampling. The telescopic end of the second limiting member 33 retracts and then extends, so that the water inlet 32 ​​corresponds to the water guide cavity 29 corresponding to the sampling chamber at the bottom layer, realizing water intake sampling at the bottom layer. The level gauge 28 in the bottom layer sampling chamber detects the water volume, and the independent fixed-depth water intake sampling of each sampling chamber is realized step by step.

[0057] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sampling device for hydraulic engineering survey, characterized by, The utility model provides a kind of sampling device, including rope release device (1) and the float (2) of supporting rope release device (1), the rope release device (1) is connected to rope (3), the lower end of the rope (3) is connected sampler (4), the lower side of the sampler (4) is connected with counterweight (5);The rope release device (1) includes several layers of rope clamp (8) and the first limiting member (9) of several layers of rope clamp (8) release, the position of the rope clamp (8) is adjusted along the rope (3);The sampler (4) includes annular sampling shell (20) and sliding through the center of sampling shell (20) conduit (25), the sampling shell (20) has several layers of sampling cavity, the upper side of the sampling shell (20) is connected with the upper end of conduit (25) between elastic member (27) of making sampling shell (20) drop, the center ring side wall of the sampling shell (20) is equipped with several layers of water inlet (31) respectively corresponding each sampling cavity, the middle part of the conduit (25) is equipped with water inlet (32), the middle part of the conduit (25) is equipped with the second limiting member (33) of the layer-by-layer limiting of sampling shell (20).

2. The sampling device for hydraulic engineering surveying according to claim 1, characterized in that, The first limiting member (9) is automatic telescopic rod, and several layers are arranged along the vertical direction of the rope release device (1), and the telescopic end of the first limiting member (9) is supported on the lower side of the rope clamp (8).

3. The sampling device for hydraulic engineering survey according to claim 2, characterized in that, The rope clamp (8) includes a rope clamping plate (10), and the rope clamping plate (10) includes a circular plate (11), an inner tube (12) and an outer tube (14).

4. The sampling device for hydraulic engineering survey according to claim 3, characterized in that, The rope clamping plate (10) is divided into two symmetrical parts, the rope clamp (8) includes an inner threaded cylinder (17), the inner threaded cylinder (17) is sleeved on the outer side of the inner tube (12) through threads, and the inner threaded cylinder (17) extends into the outer tube (14) of the adjacent upper layer rope clamp (8).

5. The sampling device for hydraulic engineering survey according to claim 4, characterized in that, The rope (3) passes through the rope clamp (8) upwards, is bent downwards and is attached to the outer side of the inner threaded cylinder (17), reaches the lower part of the inner threaded cylinder (17), and is spirally wound on the outer side of the inner threaded cylinder (17) upwards, and the outer tube (14) limits the rope (3) on the outer side of the inner threaded cylinder (17).

6. The sampling device for hydraulic engineering surveying according to claim 4, characterized in that, The top inner side of the rope release device (1) is provided with a sub-tube (19) for the inner tube (12) of the top layer rope clamp (8) to extend into, and the upper side of the rope release device (1) is provided with a rope winding cylinder (18) for the upper end of the rope (3) to wind around.

7. The sampling device for hydraulic engineering surveying according to claim 1, characterized in that, The inner side of the sampling shell (20) is provided with a plurality of horizontal partition plates (21) for separating the sampling cavities, and the center ring side of the sampling shell (20) is provided with a plurality of inner rings (23), and the inner rings (23) are provided with sealing rings (24) between the conduit (25).

8. The sampling device for hydraulic engineering surveying according to claim 7, characterized in that, The outer side of the conduit (25) and the sampling shell (20) are divided into a plurality of vertically arranged water guide cavities (29) and sealing cavities (30) by the inner rings (23), the water guide cavities (29) and the sealing cavities (30) are alternately distributed, each sampling cavity corresponds to a water guide cavity (29) and a sealing cavity (30), and the water inlet (31) is arranged between the sampling cavity and the corresponding water guide cavity (29).

9. The sampling device for hydraulic engineering surveying according to claim 8, characterized in that, The second limiting member (33) is an automatic telescopic rod, and the telescopic end of the second limiting member (33) is supported on the lower side of the inner ring (23); the second limiting member (33) corresponds to the water guide cavity (29) or the sealing cavity (30) at the same time as the water inlet (32).

10. The sampling device for hydraulic engineering surveying according to claim 8, characterized in that, A liquid level meter (28) is arranged in the sampling cavity; after the sampling cavity is filled with water, the second limiting member (33) is retracted and then extended, so that the sampling shell (20) is lowered to correspond to the sealing cavity (30) of the water inlet (31) of the sampling cavity; the first limiting member (9) releases a rope clamp (8), and the second limiting member (33) is retracted and then extended again, so that the sampling shell (20) is lowered to correspond to the water guide cavity (29) of the upper sampling cavity and the water inlet (32).

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