Sediment sampling device

Abstract

The invention relates to a sediment sampling device, and relates to the technical field of sediment sampling, and the sediment sampling device comprises: a support used for being installed on a water mobile carrier; the sampling barrel is arranged on one side of the support, a squeezing bin and a plurality of sampling bins are sequentially arranged in the sampling barrel from top to bottom, a discharging opening is formed in the bottom of the sampling barrel, and an end cover is detachably connected to the discharging opening; the sampling pipeline is arranged in the sampling barrel, a sampling valve and a sand suction pump are arranged on the sampling pipeline, and the sampling pipeline is communicated with the squeezing chamber; the squeezing drainage mechanism is arranged in the sampling barrel and is used for squeezing and dewatering the silt adsorbed into the squeezing bin and conveying the squeezed and dewatered silt into the sampling bin; and the lowering mechanism is arranged between the sampling barrel and the bracket and is used for upwards hoisting or lowering the sampling barrel. The sediment sampling device has the advantages that the sampling quality and sampling efficiency of the sediment sampling device are improved, and meanwhile the accuracy of follow-up sediment content detection is improved.

Description

Technical Field

[0001] The present application relates to the technical field of sediment sampling, and in particular to a sediment sampling device. Background Art

[0002] After the sediment is sampled, the solid particulate matter content is tested in various ways. These particles usually come from soil erosion, river transportation, seabed sediments, etc. Through the detection of particles, the size distribution, organic matter content, chemical composition, mineral composition and other data of sediment particles can be obtained, and used to evaluate water quality, monitor water turbidity, study hydrological processes, and evaluate environmental impacts. The detection of sediment content is of great significance and is the basis for hydrology, environmental science and engineering research. It plays an important role in understanding the laws of river sediment movement, hydrological processes and soil erosion mechanisms.

[0003] At present, sediment sampling devices are special equipment used to collect sediment samples in water bodies such as rivers, lakes, and oceans. The existing sampling devices mainly include sampling buckets for collecting sediment samples, sampling devices for digging and sampling when the sampling bucket touches the bottom, and cables for hoisting and lowering the sampling bucket. When sampling, the staff takes a boat, holds one end of the cable and lowers the sampling bucket into the water. When the sampling bucket touches the bottom, the sampling device digs and samples the sediment into the sampling bucket, and then pulls up the sampling bucket to complete a sampling process. Then the staff changes the sampling position and repeats the above process to complete multiple sampling processes. However, a large amount of water will accumulate in the sediment obtained by the sampling bucket after sampling, the amount of sampled sediment is small, the subsequent content detection is more random, the detection accuracy is low, and multiple sampling requires continuous pulling up and lowering of the sampling bucket, which consumes a lot of manpower and time, and the detection efficiency is low. Summary of the invention

[0004] In order to improve the sampling quality and sampling efficiency of the sediment sampling device and improve the accuracy of subsequent sediment content detection, the present application provides a sediment sampling device.

[0005] The present application provides a sediment sampling device, which adopts the following technical solution: A sediment sampling device, comprising: A bracket, used for mounting on a mobile water vehicle; A sampling barrel is arranged on one side of the bracket, wherein a pressing chamber and a plurality of sampling chambers are arranged in sequence from top to bottom in the sampling barrel, and a discharge port is arranged at the bottom of the sampling barrel, and an end cover is detachably connected to the discharge port; A sampling pipeline is arranged in the sampling barrel, a sampling valve and a sand suction pump are arranged on the sampling pipeline, and the sampling pipeline is connected with the pressing chamber; The squeezing and drainage mechanism is arranged in the sampling barrel, and is used to squeeze and dehydrate the sediment adsorbed into the squeezing chamber, and to transport the squeezed and dehydrated sediment into the sampling chamber; The lowering mechanism is arranged between the sampling barrel and the bracket, and is used for lifting or lowering the sampling barrel.

[0006] By adopting the above technical solution, when sampling underwater sediment, first the bracket and the sampling barrel are moved to the sampling position by the water mobile vehicle, and then the sampling barrel is lowered into the water body by the lowering mechanism. After the sampling barrel touches the bottom, the sand suction pump is started, and the sampling pipe is opened by the sampling valve, and the sediment sample is sucked into the squeezing chamber. Then the squeezing and drainage mechanism squeezes and dehydrates the sediment in the squeezing chamber to reduce the moisture. The squeezed sediment sample is transported to the bottom sampling chamber, and then the water mobile vehicle drives the sampling barrel to move to the next sampling position. During this period, the sampling barrel does not need to be pulled up and lowered again. It only needs to wait for the sampling barrel to move to the next sampling position, suck the sediment sample into the squeezing chamber, and squeeze and dehydrate the sediment through the squeezing and drainage mechanism and then transport it to the sampling chamber on the upper layer at the bottom for temporary storage, and then repeat the above sampling process to continuously complete the sampling of multiple sampling positions. After completing the scheduled sampling, the sampling bucket is pulled back to the mobile vehicle on the water through the lowering mechanism, and the sediment samples in each sampling chamber are taken out in turn, the content of solid particles in the sediment samples is tested, and the size distribution, organic matter content, chemical composition, mineral composition and other data analysis of the sediment particles are obtained; the squeezing and drainage mechanism squeezes and dehydrates the sediment in the squeezing chamber to reduce the moisture content in the sample, thereby improving the purity of the sediment sample, which is conducive to subsequent accurate analysis, and in conjunction with multiple sampling chambers arranged in sequence from top to bottom, not only can the pressed sediment samples be stored in layers, making it less likely for the sampled samples to be cross-influenced, thereby improving the accuracy after detection, but also the sampling of multiple sampling locations can be completed at one time within the same small time period, thereby improving sampling efficiency and quality, and providing more reliable data support for hydrology, environmental science and engineering research.

[0007] Optionally, the squeezing and drainage mechanism includes: A plurality of drainage channels are arranged along the circumference of the sampling barrel, and the drainage channels are connected to the interior of the pressing chamber; A drainage valve is arranged in the drainage channel; The squeezing component is arranged between the sampling barrel and the squeezing chamber, and is used to squeeze and dehydrate the sediment adsorbed into the squeezing chamber; The partition opening and closing components are arranged in the sampling barrel, and are arranged in plurality and correspond one to one with the plurality of sampling chambers, and are used to separate the plurality of sampling chambers to form independent spaces.

[0008] By adopting the above technical scheme, after the sediment sample is sucked into the pressing chamber, the drain valve is opened to connect the drainage channel with the inside of the pressing chamber, and then the pressing component is started to squeeze the sediment in the pressing chamber. By applying pressure, the water is forced to separate from the sediment to achieve dehydration of the sediment. During the dehydration process, the water is discharged through the drainage channel connected to the pressing chamber. After the sediment is squeezed, the drainage channel is quickly closed and the sampling chamber is opened through the partition opening and closing component to allow the squeezed sediment to enter the sampling chamber, and then the sampling chamber is closed. Whenever a batch of sediment samples after squeezing and dehydration are transported to the sampling chamber, the partition opening and closing component is actuated to seal the samples in the corresponding sampling chamber to ensure that sediment samples at different positions will not be mixed, which is convenient for subsequent accurate analysis.

[0009] Optionally, the partition opening and closing component includes: A plurality of partition plates are provided, and the plurality of partition plates are evenly distributed along the circumference of the sampling chamber, and the sampling chamber and the plurality of partition plates adjacent to each other form a closed space; A rotating shaft is rotatably connected to the inner wall of the sampling chamber, and a plurality of rotating shafts are provided and correspond to the plurality of partition plates one by one. The rotating shafts are fixedly connected to the corresponding partition plates, and the plurality of rotating shafts are arranged end to end in sequence; A bevel gear set is arranged between two adjacent rotating shafts; The self-locking driving component is arranged between one of the rotating shafts and the wall of the sampling barrel, and is used to drive the rotating shaft to rotate and lock the position of the rotating shaft after rotation.

[0010] By adopting the above technical scheme, when the partition plate is in a closed state, the sampling chamber and the upper and lower adjacent partition plates together form a closed space, becoming an independent sample storage area; when a new batch of sediment samples after squeezing and dehydration needs to be received, the self-locking drive component starts to drive one of the rotating shafts to rotate, and the rotation of the rotating shaft is transmitted to the adjacent rotating shaft through the bevel gear set, driving all the rotating shafts to rotate in sequence, and the partition plate fixedly connected to the rotating shaft rotates accordingly, opening the closed space, and the sediment samples after squeezing and dehydration fall into the sampling chamber; when the sediment samples are completely entered, the self-locking drive component starts again, rotates the rotating shaft in the opposite direction, and the partition plate is reset to re-form a closed space to isolate the sample from subsequent samples; after the partition plate is reset, the self-locking drive component locks the position of the rotating shaft to ensure that the partition plate remains stable during the sampling process, avoids accidental opening due to external factors, and makes it difficult for sediment samples to be cross-contaminated, thereby improving the reliability and accuracy of subsequent detection data.

[0011] Optionally, the self-locking drive component includes: A worm gear is fixedly sleeved on one end of the rotating shaft; A worm, rotatably connected to the inner wall of the sampling barrel and meshing with the worm wheel; The driving motor is arranged on one side of the worm.

[0012] By adopting the above technical solution, when the partition plate needs to be operated, the drive motor starts to drive the worm to rotate, and the rotation of the worm is transmitted to the worm wheel through meshing with the worm wheel, so that the worm wheel rotates accordingly. Since the worm wheel is fixed on the rotating shaft, the rotation of the worm wheel directly drives the rotating shaft to rotate. The rotation of the rotating shaft causes the partition plate fixedly connected thereto to start rotating, thereby realizing the opening or closing of the partition plate; wherein when the partition plate reaches the predetermined position, the drive motor stops, and the self-locking characteristics of the worm gear lock the position of the rotating shaft, so that the partition plate can be stably maintained in the current position without power input.

[0013] Optionally, the pressing assembly comprises: A pressing plate, slidably connected to the pressing chamber; The electric telescopic rod is arranged between the pressure plate and the sampling barrel.

[0014] By adopting the above technical solution, after the preliminary collection of the sediment sample is completed, the electric telescopic rod is started, and the electric telescopic rod pushes the pressure plate to move toward the direction of the sediment sample. The pressure plate applies pressure to the sediment in the pressing chamber. As the pressure plate moves, the moisture in the sediment is squeezed out and discharged through the drainage channel, thereby achieving dehydration of the sediment. When the pressing process is completed, the pressure plate stops moving, the electric telescopic rod retracts, and the pressure plate resets; then the sampling chamber is opened by the partition opening and closing component, and the sediment samples after squeezing and dehydration enter the sampling chamber for stratified storage.

[0015] Optionally, a plurality of guide bars are fixedly provided on the inner wall of the pressing chamber at intervals along its circumferential direction, and the guide bars are arranged along the height direction of the sampling barrel and protrude toward one side of the inner part of the pressing chamber.

[0016] By adopting the above technical solution, the raised structure of the guide strip can, on the one hand, promote the rapid discharge of water during the squeezing process, accelerate the discharge of water from the drainage channel by changing the flow path of water in the sediment sample, and improve the dehydration efficiency; on the other hand, it can reduce the contact area between the sediment sample and the inner wall of the squeezing chamber, making it difficult for the sediment to adhere to the inner wall, thereby facilitating the flow of water squeezed out of the sediment sample.

[0017] Optionally, a filter screen is provided on one side of the water inlet of the drainage channel.

[0018] By adopting the above technical solution, the filter net can, on the one hand, block the solid particles in the sediment sample from entering the drainage channel, avoid clogging the drainage channel, ensure the smooth drainage process, and improve the dehydration efficiency of the sediment sample; on the other hand, it can prevent the solid particles in the sediment sample from being lost easily.

[0019] Optionally, the decentralization mechanism includes: A wire winding drum, rotatably connected to the bracket; A hanging rope, one end of which is wound around the winding drum and the other end is connected to the sampling barrel; The power motor is arranged on one side of the winding drum.

[0020] By adopting the above technical solution, when the sampling barrel needs to be lowered to the designated position for sampling, the power motor is started, and the power motor drives the winding drum to rotate. The rotation of the winding drum causes the rope wrapped thereon to be gradually released, and the sampling barrel is lowered: after the sampling is completed, the power motor is started in reverse, driving the sampling barrel to rise until the sampling barrel is completely recovered to the bracket position.

[0021] Optionally, the decentralization mechanism further includes: A contact sensor is arranged at the bottom of the sampling barrel and is used to send a position detection signal; The controller is connected to the contact sensor and the power motor and is used to receive a position detection signal to learn the position of the bottom of the sampling barrel. When the bottom of the sampling barrel touches the bottom, the controller sends a control signal to the power motor to stop the power motor.

[0022] By adopting the above technical solution, as the sampling barrel is lowered, the contact sensor continuously monitors the distance between the bottom of the sampling barrel and the target position (such as the water bottom). When the bottom of the sampling barrel touches the bottom, the contact sensor immediately sends a position detection signal. After receiving the position detection signal, the controller sends a control signal to the power motor, and the power motor stops to ensure that the sampling barrel is no longer lowered after touching the bottom. The lowering mechanism can ensure that the sampling barrel can accurately touch the bottom, prevent the sampling barrel from being easily deflected or tipped over due to excessive lowering, and improve the stability of sampling.

[0023] Optionally, a counterweight block is detachably connected to the bottom of the sampling barrel, and the counterweight block has multiple weight specifications.

[0024] By adopting the above technical solution, the detachable connection design of the counterweight block allows the staff to select the counterweight block of corresponding weight specification according to the water depth range of the sampling site, ensuring that the sampling barrel can be smoothly lowered to the specified depth. The sampling barrel is not easily moved by factors such as water flow, thereby improving the accuracy and safety of sampling.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The squeezing and drainage mechanism squeezes and dehydrates the sediment in the squeezing chamber, reduces the moisture content in the sample, improves the purity of the sediment sample, and is conducive to subsequent accurate analysis. In addition, with multiple sampling chambers arranged in sequence from top to bottom, it can not only store the squeezed sediment samples in layers, making it difficult for the sampled samples to cross-influence each other, thus improving the accuracy after detection, but also complete the sampling of multiple sampling locations at one time within the same short period of time, thus improving the sampling efficiency and quality, and providing more reliable data support for hydrology, environmental science and engineering research; 2. Whenever a batch of squeezed and dehydrated sediment samples are transported to the sampling chamber, the separation opening and closing components will operate to seal the samples in the corresponding sampling chamber to ensure that sediment samples at different locations will not be mixed, facilitating subsequent accurate analysis; 3. The raised structure of the guide strip in the pressing component can promote the rapid discharge of water during the pressing process. By changing the flow path of water in the sediment sample, it accelerates the discharge of water from the drainage channel and improves the dehydration efficiency. On the other hand, it can reduce the contact area between the sediment sample and the inner wall of the pressing chamber, making it difficult for the sediment to adhere to the inner wall, and facilitating the flow of water squeezed out of the sediment sample. 4. After the partition plate in the partition opening and closing assembly is reset, the self-locking drive component locks the position of the rotating shaft to ensure that the partition plate remains stable during the sampling process, avoiding accidental opening due to external factors, making it difficult for sediment samples to be cross-contaminated, and improving the reliability and accuracy of subsequent test data; and when the partition plate reaches the predetermined position, the rotating shaft position is automatically locked, so that the partition plate remains stable at the current position without power input; 5. In the lowering mechanism, as the sampling barrel is lowered, the contact sensor continuously monitors the distance between the bottom of the sampling barrel and the target position (such as the bottom of the water). When the bottom of the sampling barrel touches the bottom, the contact sensor immediately sends a position detection signal. After receiving the position detection signal, the controller sends a control signal to the power motor, and the power motor stops to ensure that the sampling barrel is not lowered again after touching the bottom. The lowering mechanism can ensure that the sampling barrel can accurately touch the bottom, prevent the sampling barrel from being easily deflected or tipped over due to excessive lowering, and improve the stability of sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the sediment sampling device in this application; Figure 2 It is a schematic diagram showing the partial structure of the sediment sampling device; Figure 3 is a partial cross-sectional schematic diagram showing a sampling barrel; Figure 4 is a schematic diagram showing a further partial cross-section of the interior of the sampling barrel; Figure 5 is a partial cross-sectional schematic diagram showing a squeezing and drainage mechanism; Figure 6 It is a schematic diagram showing the local structure after the partition plate is opened; Figure 7 It is a structural diagram showing the decentralization mechanism.

[0027] Explanation of the reference numerals in the accompanying drawings: 1. Mobile vehicle on water; 2. Bracket; 3. Sampling barrel; 31. Pressing chamber; 32. Sampling chamber; 4. End cover; 5. Sampling pipeline; 51. Sampling valve; 52. Sand suction pump; 6. Counterweight; 7. Pressing and drainage mechanism; 71. Drainage channel; 72. Drainage valve; 73. Filter screen; 74. Pressing assembly; 741. Pressing plate; 742. Electric telescopic rod; 743. Guide strip; 75. Partition opening and closing assembly; 751. Partition plate; 752. Rotating shaft; 753. Bevel gear set; 754. Self-locking drive component; 7541. Worm gear; 7542. Worm; 7543. Drive motor; 8. Lowering mechanism; 81. Winding reel; 82. Lifting rope; 83. Power motor. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-Figure 7 This application is described in further detail.

[0029] The present application embodiment discloses a sediment sampling device. Figure 1 and Figure 2 The sediment sampling device includes a bracket 2 for installation on a water mobile vehicle 1. For example, the water mobile vehicle 1 can be a ship or an unmanned surface boat or other vehicle that moves on water. A sampling barrel 3 is provided on one side of the bracket 2. A pressing chamber 31 and a plurality of sampling chambers 32 are provided in the sampling barrel 3 from top to bottom. A discharge port is provided at the bottom of the sampling barrel 3. An end cap 4 is threadedly connected to the discharge port. The end cap 4 can also be detachably connected by other means such as a buckle.

[0030] Reference Figure 3 and Figure 4 , a sampling pipe 5 is provided in the sampling barrel 3, a sampling valve 51 and a sand suction pump 52 are provided on the sampling pipe 5, and the sampling pipe 5 is connected to the squeezing chamber 31. A plurality of counterweights 6 are also detachably connected to the bottom of the sampling barrel 3 by bolts, and the counterweights 6 have a plurality of weight specifications, wherein the counterweights 6 are used to enable the staff to select the counterweights 6 of the corresponding weight specifications according to the water depth range of the sampling site, so as to ensure that the sampling barrel 3 can be smoothly lowered to the specified depth, and at the same time, the sampling barrel 3 is not easily moved by factors such as water flow. A squeezing and drainage mechanism 7 is provided in the sampling barrel 3, and the squeezing and drainage mechanism 7 is used to squeeze and dehydrate the sediment adsorbed into the squeezing chamber 31, and to transport the squeezed and dehydrated sediment into the sampling chamber 32. A lowering mechanism 8 is provided between the sampling barrel 3 and the bracket 2, and the lowering mechanism 8 is used to hoist or lower the sampling barrel 3 upward.

[0031] When sampling underwater sediment, firstly, the bracket 2 and the sampling bucket 3 are moved to the sampling position by the water mobile vehicle 1, and then the sampling bucket 3 is lowered into the water body by the lowering mechanism 8. After the sampling bucket 3 touches the bottom, the sand suction pump 52 is started, and the sampling pipe 5 is opened by the sampling valve 51, and the sediment sample is sucked into the squeezing chamber 31. Then, the squeezing and drainage mechanism 7 squeezes and dehydrates the sediment in the squeezing chamber 31 to reduce the moisture. The squeezed sediment sample is transported to the bottom sampling chamber 32, and then the water mobile vehicle 1 drives the sampling bucket 3 to move to the next sampling position. During this period, the sampling bucket 3 does not need to be pulled up and lowered again. It only needs to wait for the sampling bucket 3 to move to the next sampling position, and then the sediment sample is sucked into the squeezing chamber 31, and the squeezing and drainage mechanism 7 squeezes and dehydrates the sediment and then transports it to the sampling chamber 32 on the upper layer of the bottom for temporary storage. Then, the above sampling process is repeated to continuously complete the sampling of multiple sampling positions.

[0032] After completing the scheduled sampling, the sampling barrel 3 is pulled back to the water mobile vehicle 1 through the lowering mechanism 8, and the sediment samples in each sampling chamber 32 are taken out in turn, the content of solid particles in the sediment samples is tested, and the size distribution, organic content, chemical composition, mineral composition and other data analysis of the sediment particles are obtained. The squeezing and drainage mechanism 7 squeezes and dehydrates the sediment in the squeezing chamber 31, reduces the moisture content in the sample, improves the purity of the sediment sample, and is conducive to subsequent accurate analysis. In addition, with multiple sampling chambers 32 arranged in sequence from top to bottom, not only can the squeezed sediment samples be stored in layers, so that the sampled samples are not easily cross-influenced, and the accuracy after detection is improved, but also the sampling of multiple sampling positions can be completed at one time in the same small time period, improving the sampling efficiency and quality, and providing more reliable data support for hydrology, environmental science and engineering research.

[0033] In some embodiments, reference Figure 3 and Figure 4 The squeezing and drainage mechanism 7 includes a plurality of drainage channels 71 arranged along the circumference of the sampling barrel 3, and the drainage channels 71 are connected to the inside of the squeezing chamber 31. A drainage valve 72 and a filter screen 73 are arranged on the drainage channel 71, and the drainage valve 72 is used to control the opening and closing of the drainage channel 71; the filter screen 73 is used to prevent the solid particles in the sediment sample from entering the drainage channel 71, avoid clogging the drainage channel 71, and improve the dehydration efficiency of the sediment sample, and on the other hand, it is used to prevent the solid particles in the sediment sample from being lost. A squeezing component 74 is arranged between the sampling barrel 3 and the squeezing chamber 31, and the squeezing component 74 is used to squeeze and dehydrate the sediment adsorbed into the squeezing chamber 31. A plurality of partition opening and closing components 75 are also arranged in the sampling barrel 3, and the plurality of partition opening and closing components 75 correspond to the plurality of sampling chambers 32 one by one, and the partition opening and closing components 75 are used to separate the plurality of sampling chambers 32 to form an independent space.

[0034] After the sediment sample is sucked into the squeezing chamber 31, the drain valve 72 is opened to connect the drain channel 71 with the inside of the squeezing chamber 31, and then the squeezing component 74 is started to squeeze the sediment in the squeezing chamber 31. By applying pressure, the water is forced to separate from the sediment to achieve dehydration of the sediment. During the dehydration process, the water is discharged through the drain channel 71 connected to the squeezing chamber 31. After the squeezing of the sediment is completed, the drain channel 71 is quickly closed and the sampling chamber 32 is opened through the partition opening and closing component 75, so that the squeezed sediment enters the sampling chamber 32, and then the sampling chamber 32 is closed. Whenever a batch of squeezed and dehydrated sediment samples is transported to the sampling chamber 32, the partition opening and closing component 75 is activated to seal the samples in the corresponding sampling chamber 32, ensuring that the sediment samples at different positions will not be mixed, which is convenient for subsequent accurate analysis.

[0035] In some embodiments, reference Figure 4 and Figure 5 The pressing assembly 74 includes a pressure plate 741 that is slidably connected to the pressing chamber 31 along the height direction of the sampling barrel 3; an electric telescopic rod 742 is arranged between the pressure plate 741 and the sampling barrel 3. The inner wall of the pressing chamber 31 is also fixedly provided with a plurality of guide strips 743 at intervals along its circumference. The guide strips 743 are arranged along the height direction of the sampling barrel 3 and protrude toward one side of the inner part of the pressing chamber 31. The protruding structure of the guide strips 743 can promote the rapid discharge of water during the pressing process, and accelerate the discharge of water from the drainage channel 71 by changing the flow path of water in the sediment sample, thereby improving the dehydration efficiency. On the other hand, it can reduce the contact area between the sediment sample and the inner wall of the pressing chamber 31, so that the sediment is not easy to adhere to the inner wall, and facilitate the flow of water squeezed out of the sediment sample.

[0036] After the initial collection of the sediment sample is completed, the electric telescopic rod 742 is started, and the electric telescopic rod 742 pushes the pressure plate 741 to move toward the sediment sample. The pressure plate 741 applies pressure to the sediment in the pressing chamber 31. As the pressure plate 741 moves, the water in the sediment is squeezed out and discharged through the drainage channel 71, thereby achieving dehydration of the sediment. When the squeezing process is completed, the pressure plate 741 stops moving, the electric telescopic rod 742 retracts, and the pressure plate 741 is reset. Then, the sampling chamber 32 is opened through the partition opening and closing component 75, and the sediment sample after squeezing and dehydration enters the sampling chamber 32 for stratified storage.

[0037] In some embodiments, reference Figure 5 and Figure 6The partition opening and closing assembly 75 includes a plurality of partition plates 751, which are evenly distributed along the circumference of the sampling chamber 32, and the sampling chamber 32 and the plurality of partition plates 751 adjacent to each other form a closed space. The inner wall of the sampling chamber 32 is rotatably connected with a plurality of rotating shafts 752, which correspond to the plurality of partition plates 751 one by one, and the rotating shafts 752 are fixedly connected to the corresponding partition plates 751, and the plurality of rotating shafts 752 are arranged in a regular polygonal shape in sequence with their heads against their tails; a bevel gear set 753 is provided between two adjacent rotating shafts 752, and the bevel gear set 753 includes two bevel gears fixedly sleeved on two adjacent rotating shafts 752. A self-locking driving component 754 is provided between one of the rotating shafts 752 and the wall of the sampling barrel 3, and the self-locking driving component 754 is used to drive the rotating shaft 752 to rotate and lock the position of the rotating shaft 752 after rotation.

[0038] When the partition plate 751 is in the closed state, the sampling chamber 32 and the upper and lower adjacent partition plates 751 together form a closed space, becoming an independent sample storage area. When a new batch of squeezed and dehydrated sediment samples is needed, the self-locking drive component 754 is started, driving one of the rotating shafts 752 to rotate, and the rotation of the rotating shaft 752 is transmitted to the adjacent rotating shaft 752 through the bevel gear set 753, driving all the rotating shafts 752 to rotate in turn, and the partition plate 751 fixedly connected to the rotating shaft 752 rotates accordingly, opening the closed space, and the squeezed and dehydrated sediment samples fall into the sampling chamber 32.

[0039] When the sediment sample is completely inserted, the self-locking driving component 754 is started again, and the rotating shaft 752 is rotated in the opposite direction, and the partition plate 751 is reset to form a closed space again, isolating the sample from the subsequent samples. After the partition plate 751 is reset, the self-locking driving component 754 locks the position of the rotating shaft 752 to ensure that the partition plate 751 remains stable during the sampling process, avoiding accidental opening due to external factors, making it difficult for cross contamination between sediment samples, and improving the reliability and accuracy of subsequent test data.

[0040] In some embodiments, reference Figure 5 The self-locking driving component 754 includes a worm gear 7541 fixedly sleeved on one end of the rotating shaft 752, and the inner wall of the sampling barrel 3 is rotatably connected with a worm 7542, and the worm 7542 and the worm gear 7541 are meshed with each other. A driving motor 7543 is also provided on one side of the worm 7542.

[0041] When the partition plate 751 needs to be operated, the driving motor 7543 is started, driving the worm 7542 to rotate, and the rotation of the worm 7542 is transmitted to the worm wheel 7541 through meshing with the worm wheel 7541, so that the worm wheel 7541 rotates accordingly. Since the worm wheel 7541 is fixed on the rotating shaft 752, the rotation of the worm wheel 7541 directly drives the rotating shaft 752 to rotate, and the rotation of the rotating shaft 752 causes the partition plate 751 fixedly connected thereto to start rotating, thereby realizing the opening or closing of the partition plate 751. When the partition plate 751 reaches the predetermined position, the driving motor 7543 stops, and the self-locking characteristics of the worm wheel 7541 and the worm 7542 lock the position of the rotating shaft 752, so that the partition plate 751 can be stably maintained at the current position without power input.

[0042] In some embodiments, reference Figure 7 The lowering mechanism 8 includes a winding drum 81 rotatably connected to the bracket 2, a suspension rope 82 is wound around the winding drum 81, and one end of the suspension rope 82 is connected to the sampling barrel 3. A power motor 83 is arranged on one side of the winding drum 81. The lowering mechanism 8 also includes a contact sensor and a controller, wherein the contact sensor is arranged at the bottom of the sampling barrel 3 for sending a position detection signal. The controller is connected to the contact sensor and the power motor 83, and is used to receive the position detection signal to know the position of the bottom of the sampling barrel 3. When the bottom of the sampling barrel 3 touches the bottom, the controller sends a control signal to the power motor 83 to stop the power motor 83.

[0043] When it is necessary to lower the sampling bucket 3 to the designated position for sampling, the power motor 83 is started, and the power motor 83 drives the winding drum 81 to rotate. The rotation of the winding drum 81 causes the rope 82 wound thereon to be gradually released, and the sampling bucket 3 is lowered. As the sampling bucket 3 is lowered, the contact sensor continuously monitors the distance between the bottom of the sampling bucket 3 and the bottom of the water. When the bottom of the sampling bucket 3 touches the bottom, the contact sensor immediately sends a position detection signal. After receiving the position detection signal, the controller sends a control signal to the power motor 83, and the power motor 83 stops to ensure that the sampling bucket 3 is no longer lowered after touching the bottom. After the sampling is completed, the power motor 83 is started in reverse to drive the sampling bucket 3 to rise until the sampling bucket 3 is completely recovered to the position of the bracket 2. The lowering mechanism 8 can ensure that the sampling bucket 3 can accurately touch the bottom, prevent the sampling bucket 3 from being easily deflected or tipped due to excessive lowering, and improve the stability of sampling.

[0044] The implementation principle of a sediment sampling device in an embodiment of the present application is as follows: when sampling underwater sediment, first, the bracket 2 and the sampling bucket 3 are moved to the sampling position by the water-based mobile vehicle 1, and then the sampling bucket 3 is lowered into the water body by the lowering mechanism 8. After the sampling bucket 3 touches the bottom, the sand suction pump 52 is started, and the sampling pipe 5 is opened through the sampling valve 51, and the sediment sample is sucked into the squeezing chamber 31. Then, the squeezing and drainage mechanism 7 squeezes and dehydrates the sediment in the squeezing chamber 31 to reduce the moisture content. The squeezed sediment sample is transported to the bottom sampling chamber 32. Then, the water-based mobile vehicle 1 drives the sampling bucket 3 to move to the next sampling position. During this period, the sampling bucket 3 does not need to be pulled up and lowered again. It only needs to wait for the sampling bucket 3 to move to the next sampling position, and then the sediment sample is sucked into the squeezing chamber 31, and the squeezing and drainage mechanism 7 is used to squeeze and dehydrate the sediment and then transport it to the sampling chamber 32 on the upper layer of the bottom for temporary storage, and then the above sampling process is repeated. The sampling process is to continuously complete the sampling of multiple sampling positions. After completing the predetermined sampling, the sampling barrel 3 is pulled back to the water mobile vehicle 1 through the lowering mechanism 8, and the sediment samples in each sampling chamber 32 are taken out in turn, the content of solid particles in the sediment samples is detected, and the size distribution, organic matter content, chemical composition, mineral composition and other data analysis of the sediment particles are obtained; wherein the squeezing and drainage mechanism 7 squeezes and dehydrates the sediment in the squeezing chamber 31, reduces the moisture content in the sample, improves the purity of the sediment sample, and is conducive to subsequent accurate analysis, and cooperates with multiple sampling chambers 32 arranged in sequence from top to bottom, not only can the squeezed sediment samples be stored in layers, so that the sampled samples are not easily cross-influenced, and the accuracy after detection is improved, but also the sampling of multiple sampling positions can be completed at one time within the same small time period, thereby improving the sampling efficiency and quality, and providing more reliable data support for hydrology, environmental science and engineering research.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sediment sampling device, characterized in that: include: A bracket (2) for mounting on the water mobile vehicle (1); A sampling barrel (3) is arranged on one side of the bracket (2), wherein a pressing chamber (31) and a plurality of sampling chambers (32) are arranged in sequence from top to bottom in the sampling barrel (3), and a discharge port is arranged at the bottom of the sampling barrel (3), and an end cover (4) is detachably connected to the discharge port; A sampling pipeline (5) is arranged in the sampling barrel (3), a sampling valve (51) and a sand suction pump (52) are arranged on the sampling pipeline (5), and the sampling pipeline (5) is connected to the pressing chamber (31); A squeezing and drainage mechanism (7) is arranged in the sampling barrel (3) and is used to squeeze and dehydrate the sediment adsorbed into the squeezing chamber (31), and to transport the squeezed and dehydrated sediment into the sampling chamber (32); The lowering mechanism (8) is arranged between the sampling barrel (3) and the bracket (2) and is used for lifting or lowering the sampling barrel (3).

2. A sediment sampling device according to claim 1, characterized in that: The squeezing and drainage mechanism (7) comprises: A plurality of drainage channels (71) are arranged along the circumference of the sampling barrel (3), and the drainage channels (71) are connected to the interior of the pressing chamber (31); A drainage valve (72) is disposed in the drainage channel (71); A squeezing assembly (74) is disposed between the sampling barrel (3) and the squeezing chamber (31) and is used to squeeze and dehydrate the sediment adsorbed into the squeezing chamber (31); The partition opening and closing components (75) are arranged in the sampling barrel (3), and are provided in plurality and correspond one-to-one with the plurality of sampling chambers (32), and are used to separate the plurality of sampling chambers (32) to form independent spaces.

3. A sediment sampling device according to claim 2, characterized in that: The partition opening and closing assembly (75) comprises: A plurality of partition plates (751) are provided, the plurality of partition plates (751) are evenly distributed along the circumference of the sampling chamber (32), and the sampling chamber (32) and the plurality of partition plates (751) adjacent to each other form a closed space; A rotating shaft (752) is rotatably connected to the inner wall of the sampling chamber (32), and a plurality of rotating shafts (752) are provided and correspond one to one with the plurality of partition plates (751). The rotating shafts (752) are fixedly connected to the corresponding partition plates (751), and the plurality of rotating shafts (752) are arranged end to end in sequence; A bevel gear set (753) is arranged between two adjacent rotating shafts (752); The self-locking driving component (754) is arranged between one of the rotating shafts (752) and the wall of the sampling barrel (3), and is used to drive the rotating shaft (752) to rotate and lock the position of the rotating shaft (752) after rotation.

4. A sediment sampling device according to claim 3, characterized in that: The self-locking driving component (754) comprises: A worm wheel (7541) is fixedly sleeved on one end of the rotating shaft (752); A worm (7542) is rotatably connected to the inner wall of the sampling barrel (3) and meshes with the worm wheel (7541); The driving motor (7543) is arranged on one side of the worm (7542).

5. A sediment sampling device according to claim 2, characterized in that: The pressing assembly (74) comprises: A pressing plate (741) is slidably connected in the pressing chamber (31); The electric telescopic rod (742) is arranged between the pressure plate (741) and the sampling barrel (3).

6. A sediment sampling device according to claim 5, characterized in that: The inner side wall of the pressing chamber (31) is fixedly provided with a plurality of guide strips (743) at intervals along its circumference, and the guide strips (743) are arranged along the height direction of the sampling barrel (3) and protrude toward one side of the interior of the pressing chamber (31).

7. A sediment sampling device according to claim 2, characterized in that: A filter screen (73) is provided on one side of the water inlet of the drainage channel (71).

8. A sediment sampling device according to any one of claims 1 to 7, characterized in that: The lowering mechanism (8) comprises: A winding drum (81) rotatably connected to the bracket (2); A hanging rope (82), one end of which is wound around the winding drum (81) and the other end of which is connected to the sampling barrel (3); The power motor (83) is arranged on one side of the winding drum (81).

9. A sediment sampling device according to claim 8, characterized in that: The lowering mechanism (8) further comprises: A contact sensor, arranged at the bottom of the sampling barrel (3), for sending a position detection signal; The controller is connected to the contact sensor and the power motor (83) and is used to receive a position detection signal to obtain the position of the bottom of the sampling barrel (3). When the bottom of the sampling barrel (3) touches the bottom, the controller sends a control signal to the power motor (83) to stop the power motor (83).

10. A sediment sampling device according to any one of claims 1 to 7, characterized in that: The bottom of the sampling barrel (3) is detachably connected to a counterweight block (6), and the counterweight block (6) has a plurality of weight specifications.

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