Bottom mud soil sampler
By employing a double-sealed and adjustable-volume sampler design, the problem of sample mixing and volume fixation under water flow impact is solved, enabling the integrity and adaptability of sediment sample collection and ensuring accurate detection of pollutant distribution and organic matter content.
Patent Information
- Application Number
- CN202511745599.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-02-06
AI Technical Summary
Existing sediment soil samplers are susceptible to water flow impact during the lifting process, causing the sample to mix with the upper water layer and disrupting the integrity of the longitudinal profile. Furthermore, the fixed volume of the sampler cannot adapt to different sediment textures, resulting in problems such as incomplete sampling or jamming.
It adopts a dual-sealing design and adjustment device, which uses an annular airbag to seal the sampling barrel port and an adjustable-volume sampling arm to ensure sample integrity and adapt to the collection volume of different sediment textures.
It effectively prevents water from mixing in, ensures the integrity of the longitudinal profile of the sediment sample, adapts to different environments to obtain full samples, and improves the environmental adaptability and detection accuracy of the sampler.
Smart Images
Figure CN121475765A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of sampling equipment technology, and in particular to a bottom sediment soil sampler. Background Technology
[0002] As an important component of aquatic ecosystems, sediment's physicochemical properties (such as pollutant content, organic matter distribution, and particle composition) are core indicators for water environment monitoring and pollution control assessment. Accurate collection of representative sediment samples is a prerequisite for subsequent testing and analysis. Currently, sediment samplers are commonly used in hydrological monitoring and water conservancy engineering to collect sediment samples from watercourses, lakes, and reservoirs.
[0003] The samplers in the existing technology use mechanically snap-fit doors. During the lifting process after sampling, the doors are easily affected by water flow and equipment shaking, which can cause gaps to form. This can lead to the mixing of bottom sediment samples with the upper water, destroying the integrity of the longitudinal profile of the sample. This is especially true for surface mud (particle size ≤50μm), where the water mixing rate can reach 15%-25%, directly interfering with the accuracy of detection of key indicators such as pollutant distribution and organic matter content.
[0004] In addition, the sampler chamber in the existing technology is designed with a fixed volume, which cannot adjust the sampling volume according to the sampling depth and the texture of the bottom mud. When facing soft mud layers, the sample is prone to overflow due to insufficient volume. When facing sandy or hard mud layers, the insertion resistance of the chamber increases sharply, which can easily lead to incomplete sampling or chamber jamming. Summary of the Invention
[0005] The purpose of this invention is to provide a bottom sediment soil sampler that can solve the above-mentioned technical problems; This invention provides a sediment soil sampler, comprising: Main frame and lead weights mounted on the main frame; Several auxiliary frames are respectively set on the main frame; Several sampling mechanisms are respectively installed on the auxiliary frame; The sampling mechanism includes a sampling arm, which is mounted on an auxiliary frame and has a sampling bucket at one end. The sampling bucket has a first cap group and a second cap group at both ends, and the first cap group and the second cap group are rotatably connected to the sampling bucket. In addition, a reset device is provided between the first cap group and the second cap group. The first capping assembly includes a capping body, which is rotatably connected to the sampling bucket. The capping body is provided with a cap handle and has a groove. An annular airbag is embedded in the groove and is connected to the gas cylinder on the sampling arm through a gas tube. An adjustment device is installed inside the sampling arm. One end of the adjustment device passes through the sampling bucket and is connected to the adjustment device inside the sampling bucket. The volume inside the sampling bucket is adjusted by changing the position of the adjustment device. In the sampling state, the adjustment device limits the first and second capping groups. The controller is connected to the adjustment device and the gas cylinder via control lines.
[0006] As a further technical solution, it also includes: A vibration device is installed inside the sampling barrel and connected to a controller to cause the sampling barrel to vibrate during its own operation.
[0007] As a further technical solution, the adjustment device includes: An adjusting rod is inserted through the sampling arm, and a locking body is provided on the adjusting rod. The locking body moves within the sampling arm under the action of the adjusting rod. The power supply is located inside the sampling arm, and a limiter is installed on the power supply. Both the power supply and the limiter are connected to the controller.
[0008] As a further technical solution, the snap-fit body includes: An adjusting block is set inside a limiting block inside the sampling arm, and an adjusting rod passes through the adjusting block and is threadedly connected to the adjusting block. The extension group is set on the adjustment block; The limiting group is set on the extension group; in the data acquisition state, the limiting group limits the first capping group and the second capping group.
[0009] As a further technical solution, the extension assembly includes a first extension plate and a second extension plate, which are arranged opposite to each other on the adjustment block; The limiting assembly includes a first connecting section and a second connecting section, one end of which is rotatably connected to the first extension plate and the second extension plate respectively; the other end is movably connected to the first limiting section and the second limiting section respectively, and the other ends of the first limiting section and the second limiting section are movably connected to the sampling arm respectively.
[0010] As a further technical solution, the limiting body includes: The mounting housing is installed on the power supply unit; The limit head is mounted on the mounting housing; The cylinder is housed in the mounting housing and connected to the gas cylinder via a gas pipe. An elastic body is provided between the cylinder and the limit head. The cylinder is connected to the controller via a control line.
[0011] As a further technical solution, the regulating device includes: The first and second adjustment groups are arranged opposite to each other inside the sampling bucket; A connecting ring is positioned between the first and second adjustment groups, and one end of the adjustment rod passes through the connecting ring.
[0012] As a further technical solution, the first adjustment group includes: A piston body is installed inside the sampling bucket, and a piston plate is installed on the piston body; The piston arm is rotatably connected to the piston plate at one end, and a locating pin is rotatably connected to the other end, which passes through the connecting ring.
[0013] As a further technical solution, a limiting protrusion is provided on the positioning pin, and the limiting protrusion is retractably provided on the positioning pin.
[0014] As a further technical solution, the annular airbag is provided with several positioning posts and several positioning holes are provided in the groove. In the installed state, the several positioning posts pass through the several positioning holes.
[0015] The technical solution of this invention employs a dual-sealing design. On one hand, the first and second sealing caps at both ends of the sampling bucket are rotatably connected to the sampling bucket and can be quickly closed with the reset device. On the other hand, the annular airbag embedded in the groove of the sealing body is connected to the air cylinder on the sampling arm through an air tube. After inflation, it can tightly fit the port of the sampling bucket, forming a dual protection of mechanical closure and annular airbag sealing. This completely blocks the water mixing channel, minimizes the mixing rate of surface mud into the water, and effectively ensures the integrity of the longitudinal profile of the bottom sediment sample, laying the foundation for the accurate detection of key indicators such as pollutant distribution and organic matter content.
[0016] Furthermore, the technical solution of this invention overcomes the bottleneck of fixed volume through the coordinated operation of the adjustment device and the regulating device. One end of the adjustment device inside the sampling arm passes through the sampling bucket and is connected to the regulating device inside the bucket. By adjusting the adjustment device, the position of the regulating device inside the sampling bucket can be changed, thereby flexibly adjusting the sampling volume. This allows for the adjustment of the sampling volume according to the sampling depth or the texture of the bottom mud, avoiding sample overflow from soft mud layers and reducing the insertion resistance of hard mud layers. This ensures that full and qualified samples can be obtained in different environments, greatly improving the environmental adaptability of the sampler. Attached Figure Description
[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 This is a perspective view of a soil sampler according to the present invention; Figure 2 This is a perspective view of the sampling mechanism in this invention; Figure 3 This is a perspective view of the first cap assembly in this invention; Figure 4 This is a schematic diagram of the sampling mechanism in this invention; Figure 5 for Figure 4 A cross-sectional view along the AA direction; Figure 6 for Figure 5 Enlarged structural diagram of section X in the middle; Figure 7 for Figure 5 Enlarged structural diagram of the Y-section; Figure 8 This is a schematic diagram of the sampling mechanism in this invention from another angle; Figure 9 for Figure 8 Cross-sectional view along the BB direction; Figure 10 This is a schematic diagram of the sampling mechanism in this invention at one angle; Figure 11 for Figure 10 A cross-sectional view along the CC direction; Figure 12 for Figure 11 Enlarged structural diagram of section Z in the middle; Figure 13 This is a connection block diagram of the controller in this invention.
[0019] Explanation of reference numerals in the attached figures: 101-Main frame; 102-Lead weight; 103-Auxiliary frame; 200-Sampling mechanism; 201-Sampling arm; 202-Sampling bucket; 231-First cap assembly; 2331-Cap body; 2332-Groove; 2333-Annular airbag; 2334-Positioning post; 2335-Positioning hole; 2336-Cap handle; 232-Second cap assembly; 233-Reset device; 300-Adjusting device; 301-Adjusting rod; 311-Limiting plate; 312-Slot; 321-Adjusting block; 3221-First extension plate; 3222-Second extension plate; 3 231-First connecting section; 3232-Second connecting section; 3233-First limiting section; 3234-Second limiting section; 303-Power supply body; 304-Limiting body; 341-Mounting shell; 342-Limiting head; 343-Cylinder; 344-Elastic body; 305-Limiting block; 401-First adjusting group; 411-Piston body; 412-Piston plate; 413-Piston arm; 414-Positioning pin; 415-Limiting protrusion; 402-Second adjusting group; 403-Connecting ring; 500-Controller; 600-Gas cylinder; 700-Vibration device. Detailed Implementation
[0020] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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.
[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.
[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0023] like Figure 1-13 As shown, the present invention provides a bottom sediment soil sampler, comprising: The main frame 101 and the lead weight 102 mounted on the main frame 101; when placed in water, the lead weight 102 ensures overall balance; several auxiliary frames 103 are mounted on the main frame 101; such as Figure 1 As shown, the present invention is provided with three auxiliary frames 103, two of which are fixed to the lead weight 102 by the main frame 101, and the other auxiliary frame 103 is fixed to the wing plate of the lead weight 102 by the main frame 101. After the equipment enters the water, the lead weight 102 can simultaneously maintain the stability of the main frame 101 and the auxiliary frames 103. Several sampling mechanisms 200 are respectively set on the auxiliary frame 103. After the several sampling mechanisms 200 follow the lead fish 102 to the bottom of the water, they will perform soil sampling. In this invention, six sampling mechanisms 200 are preferably set and respectively set at both ends of three auxiliary frames 103. When placed at the bottom of the water, the six sampling mechanisms 200 will perform sampling simultaneously. The sampling mechanism 200 includes a sampling arm 201 mounted on an auxiliary frame 103, with a sampling bucket 202 at one end of the sampling arm 201. A first cap group 231 and a second cap group 232 are respectively provided at both ends of the sampling bucket 202, and the first cap group 231 and the second cap group 232 are rotatably connected to the sampling bucket 202. A reset device 233 is provided between the first cap group 231 and the second cap group 232. Before entering the water, the first cap group 231 and the second cap group 232 are operated and then the sampling bucket 200 is used to retrieve samples. The sampling arm 201 is positioned to keep the first cap group 231 and the second cap group 232 in the open state, so that both ends of the sampling bucket 202 are unobstructed. When placed on the bottom of the water, the sample will enter the sampling bucket 202. After the collection is completed, the sampling arm 201 releases the restriction on the first cap group 231 and the second cap group 232. After the first cap group 231 and the second cap group 232 are activated, they respectively seal both ends of the sampling bucket 202, thus sealing the sampling bucket 202. In this invention, the reset device 233 is a spring. like Figure 3 As shown, the first sealing assembly 231 includes a sealing body 2331, which is rotatably connected to the sampling container 202. The sealing body 2331 has a handle 2336, and a groove 2332 is formed on the sealing body 2331. An annular airbag 2333 is embedded in the groove 2332. The annular airbag 2333 is connected to a gas cylinder 600 on the sampling arm 201 via an air tube. Specifically, when the first sealing assembly 231 is in the open state, the sampling arm 201 restricts the handle 2336, causing the sealing body 2331 to be separated from the sampling container 202. After sampling is completed... The sampling arm 201 releases the restriction on the cap handle 2336. Under the action of the reset device 233, the cap body 2331 contacts one end of the sampling barrel 202 and seals one end of the sampling barrel 202. The gas cylinder 600 fills the annular air bag 2333 with gas. After the annular air bag 2333 expands, it is placed between the cap body 2331 and the inner wall of the sampling barrel 202 to further increase the sealing performance and prevent the sample in the sampling barrel 202 from being discharged or external water from entering the sampling barrel 202. In this invention, it is preferred that the gas cylinder is filled with 0.4-0.8MPa compressed air. An adjustment device 300 is installed inside the sampling arm 201. One end of the adjustment device 300 passes through the sampling barrel 202 and connects to an adjustment device inside the sampling barrel 202. The volume inside the sampling barrel 202 is adjusted by changing the position of the adjustment device. In the sampling state, the adjustment device 300 limits the first cap group 231 and the second cap group 232. Specifically, when the first cap group 231 and the second cap group 232 are in the open state, the handles 2336 on the first cap group 231 and the second cap group 232 are adjusted by the adjustment device 300 on both sides. The sampling bucket 202 is initially limited by a limit switch. After sampling is completed, the adjustment device 300 removes the limit switch from the first cap group 231 and the second cap group 232. The first cap group 231 and the second cap group 232 then seal both ends of the sampling bucket 202 under the action of the reset device 233. Before the sampling bucket 202 is immersed in water, the adjustment device 300 needs to be adjusted, and the adjustment device 300 drives the adjustment device to move inside the sampling bucket 202 to adjust the volume inside the sampling bucket 202. After adjustment, the sampling bucket 202 is placed in the sampling position for sampling. The controller 500 is connected to the adjustment device 300 and the gas cylinder 600 via a control line. When the cover contacts one end of the sampling barrel 202, the controller 500 controls the gas cylinder 600 to fill the annular gas bag 2333 with gas (such as compressed air), causing the annular gas bag 2333 to inflate. The annular gas bag 2333 is connected to the gas cylinder 600 via a gas tube (not shown in the figure), and a solenoid valve is installed at the connection between the gas cylinder 600 and the gas tube. The solenoid valve is connected to the controller 500, and the controller 500 controls the opening and closing of the solenoid valve to deliver gas from the gas cylinder 600 to the gas tube. It should be noted that the gas cylinder 600 is mounted on the sampling arm 201 and uses a waterproof layer (all waterproof layers are IP68) as in existing technology. The annular airbag 2333 and solenoid valve are sealed with a high-level protective structure (withstanding water depths of 0-30m) to prevent water from affecting them during underwater use. In addition, after sampling is completed, the controller 500 controls the adjustment device 300 to release the restriction on the first cap group 231 and the second cap group 232. Then, the first cap group 231 and the second cap group 232 are sealed to both ends of the sampling bucket 202 under the action of the reset device 233.
[0024] The technical solution of this invention employs a double-sealing design. On one hand, the first cap group 231 and the second cap group 232 at both ends of the sampling barrel 202 are rotatably connected to the sampling barrel 202 and can be quickly closed with the reset device 233. On the other hand, the annular airbag 2333 embedded in the groove 2332 of the cap body 2331 is connected to the air cylinder 600 on the sampling arm 201 through an air tube. After inflation, it can tightly fit the port of the sampling barrel 202, forming a double protection of mechanical closure and sealing by the annular airbag 2333. This completely blocks the water mixing channel, minimizes the mixing rate of surface mud water, effectively ensures the integrity of the longitudinal profile of the bottom sediment sample, and lays the foundation for the accurate detection of key indicators such as pollutant distribution and organic matter content.
[0025] Furthermore, the technical solution of the present invention overcomes the bottleneck of fixed volume through the coordinated cooperation of the adjustment device 300 and the regulating device. One end of the adjustment device 300 in the sampling arm 201 passes through the sampling bucket 202 and is connected to the regulating device inside the bucket. By adjusting the adjustment device 300, the position of the regulating device in the sampling bucket 202 can be changed, thereby flexibly adjusting the sampling volume. This allows for adjustments based on the sampling depth or bottom mud texture to adapt the sampling volume, avoiding sample overflow from soft mud layers and reducing insertion resistance in hard mud layers. This ensures that full and qualified samples can be obtained in different environments, significantly improving the environmental adaptability of the sampler.
[0026] like Figure 9 As shown, the vibration device 700 is installed inside the sampling container 202 and connected to the controller 500. The vibration device 700 causes the sampling container 202 to vibrate during its own operation. Specifically, the control line connecting the vibration device 700 passes through the sampling container 202 and is connected to the controller 500. The controller 500 controls the start and stop of the vibration device 700. At the same time, a waterproof layer is installed at the location of the vibration device 700 to avoid water damage during underwater operation. In addition, a pressure sensor (not shown in the figure) is also installed on the lead weight 102 to cooperate with the vibration device 700. The pressure sensor is connected to the controller 500 via a wire. When it comes into contact with the sampling location, the pressure sensor acquires the geological conditions of the sampling location. If the geological conditions at the sampling location are hard, the pressure sensor sends the acquired data to the controller 500. The controller 500 then activates the vibration device 700, which in turn drives the sampling bucket 202 to vibrate, thereby increasing the insertion force of the sampling bucket 202 and thus improving the sampling efficiency of the sampling bucket 202. In this invention, the vibration device 700 is preferably a miniature vibration motor with a vibration frequency of 50-100Hz and an amplitude of 0.5-2mm.
[0027] like Figure 11As shown, the adjustment device 300 includes an adjustment rod 301 that passes through the sampling arm 201, and a snap-fit body is provided on the adjustment rod 301. The snap-fit body moves within the sampling arm 201 under the drive of the adjustment rod 301. The power supply 303 is provided within the sampling arm 201, and a limit body 304 is provided on the power supply 303. Both the power supply 303 and the limit body 304 are connected to the controller 500. The vibration device 700 is connected to the power supply 303 through a wire, and the power supply 303 provides the electrical energy required for the vibration device 700 to operate. Preferably, the power supply 303 is a 12V / 5Ah-12V / 10Ah lithium-ion rechargeable lithium battery, and is connected to the controller 500, the vibration device 700 and the solenoid valve of the cylinder 343 through an IP67-rated junction box. The junction box has a built-in 10A overload protection module to prevent short circuits from damaging the components, and a waterproof layer is provided on the outside of the battery for waterproofing. Furthermore, the adjusting rod 301 is preferably a threaded rod, with one end threadedly connected to the adjusting device. During use, the adjusting device is adjusted by rotating the adjusting rod 301, thereby changing the volume inside the sampling bucket 202. The locking body is threadedly connected to the adjusting rod 301, and when the adjusting rod 301 is pushed, the locking body moves within the sampling arm 201 along with the adjusting rod 301. The locking body also restricts the position of the adjusting rod 301, preventing the adjusting rod 301 from shifting within the sampling arm 201. The snap-fit body includes an adjusting block 321 disposed within a limiting block 305 inside the sampling arm 201, an adjusting rod 301 passing through the adjusting block 321 and threadedly connected to it; an extension assembly disposed on the adjusting block 321; and a limiting assembly disposed on the extension assembly. In the sampling state, the limiting assembly limits the first capping assembly 231 and the second capping assembly 232. Specifically, when it is necessary to limit the first capping assembly 231 and the second capping assembly 232, the adjusting rod 301 is pressed, causing the adjusting block 321 to slide within the limiting block 305. A groove is provided inside the adjusting block 305, and sliding plates are provided on both sides of the adjusting block 321. The sliding plates pass through the groove, so that the adjusting block 321 drives the sliding plates to slide in the groove under the action of the adjusting rod 301. When the adjusting rod 301 is rotated, the adjusting block 321 will not rotate with the adjusting rod 301 because the sliding plates are placed in the groove. In addition, a handle is provided at the top of the adjusting rod 301, which facilitates the operation of the adjusting rod 301 and limits the maximum pressing distance of the adjusting rod 301, so as to prevent the adjusting block 321 from disengaging from the limiting block 305 during the pressing of the adjusting rod 301. As the adjusting block 321 moves in tandem with the adjusting rod 301, the extension group drives the limiting group to move simultaneously. After a certain distance, the limiting body 304 limits the adjusting rod 301, and the limiting group limits the first capping group 231 and the second capping group 232 on both sides respectively. Specifically, the extension group includes a first extension plate 3221 and a second extension plate 3222, which are arranged opposite to each other on the adjusting block 321. The limiting group includes a first connecting section 3231 and a second connecting section 3232, one end of which is rotatably connected to the first extension plate 3221 and the second extension plate 3222 respectively. The other end is movably connected to the first limiting section 3233 and the second limiting section 3234 respectively. The other ends of the first limiting section 3233 and the second limiting section 3234 are movably connected to the sampling arm 201 respectively. It should be noted that a spring is provided between the first connecting section 3231 and the second connecting section 3232; for example Figure 9 As shown, when the adjusting rod 301 is pressed down, one end of the first connecting segment 3231 and the second connecting segment 3232 rotates on the first extension plate 3221 and the second extension plate 3222 respectively, while the spring provided between the other ends of the first connecting segment 3231 and the second connecting segment 3232 is stretched; at the same time, during the rotation of the first connecting segment 3231 and the second connecting segment 3232, the other end of the first limiting segment 3233 and the second limiting segment 3234 will be driven to rotate by the pin connecting the sampling arm 201, thereby changing the angle of the upper limiting groove of the first limiting segment 3233 and the second limiting segment 3234. In this way, when the first cap group 231 and the second cap group 232 are pressed down, the spring provided between the first limiting segment 3231 and the second limiting segment 3234 will be stretched. After the cap handle 2336 is placed in the limiting groove, the limiting groove can limit the cap handle 2336, that is, one end of the cap handle 2336 is inserted into the limiting groove; when the limiting body 304 releases the limiting of the adjusting rod 301, under the action of the spring, the other ends of the first connecting section 3231 and the second connecting section 3232 move relative to each other, and drive the first connecting section 3231 and the second connecting section 3232 to rotate, and change the angle of the limiting groove during the rotation, so that the limiting groove releases the restriction on the first cap group 231 and the second cap group 232, and under the action of the reset device 233, the first cap group 231 and the second cap group 232 are sealed with both ends of the sampling bucket 202.
[0028] like Figure 11 and Figure 12As shown, the limiting body 304 includes a mounting shell 341 mounted on the power supply body 303; a limiting head 342 passing through the mounting shell 341; a cylinder 343 disposed inside the mounting shell 341 and connected to the gas cylinder 600 via an air pipe, and an elastic body 344 disposed between the cylinder 343 and the limiting head 342; the cylinder 343 is connected to the controller 500 via a control line; in addition, a limiting plate 311 is provided on the adjusting rod 301, and a slot 312 is provided on the limiting plate 311; the slot 312 is adapted to the limiting head 342; when the adjusting rod 301 is pressed, the cylinder 343 is in a retracted state. There is no contact between the limiting head 342 and the limiting plate 311; when the limiting plate 311 is driven by the adjusting rod 301 to contact the limiting head 342, it pushes the limiting head 342 into the mounting shell 341, and squeezes the elastic body 344 during the retraction of the limiting head 342; as the limiting plate 311 continues to move, the limiting head 342 extends out of the mounting shell 341 under the push of the elastic body 344, the controller 500 controls the cylinder 343 to start, and pushes the limiting head 342, thereby limiting the limiting plate 311 through the limiting head 342, and thus limiting the adjusting rod 301; in this invention, the preferred elastic body 344 is a spring.
[0029] After sampling is completed, the controller 500 controls the cylinder 343 to stop pressing the limit head 342. Under the action of the spring between the first connecting section 3231 and the second connecting section 3232, a force is generated to push the adjusting rod 301 upward (the tension of the spring is greater than the thrust of the elastic body 344), causing the limiting plate 311 to push the limit head 342 into the housing and reset the adjusting rod 301, thus completing the closing operation of the first sealing group 231 and the second sealing group 232.
[0030] like Figure 5 As shown, the adjustment device includes a first adjustment group 401 and a second adjustment group 402, which are arranged opposite to each other inside the sampling barrel 202; a connecting ring 403 is disposed between the first adjustment group 401 and the second adjustment group 402, and one end of the adjusting rod 301 passes through the connecting ring 403; specifically, the adjusting rod 301 is threadedly connected to the connecting ring 403. When the adjusting rod 301 is rotated, the first adjustment group 401 and the second adjustment group 402 will not rotate with the adjusting rod 301 due to their restriction, thereby causing the connecting ring 403 to move up and down on the adjusting rod 301, and changing the position of the first adjustment group 401 and the second adjustment group 402 inside the sampling barrel 202, thereby adjusting the internal volume of the sampling barrel 202. like Figure 7As shown, as a further technical solution, the first adjustment group 401 includes a piston body 411 disposed inside the sampling barrel 202; and a piston plate 412 is disposed on the piston body 411; one end of the piston arm 413 is rotatably connected to the piston plate 412, and a positioning pin 414 is rotatably connected to the other end, the positioning pin 414 passing through the connecting ring 403; when the connecting ring 403 is adjusted, the positioning pin 414 is pulled by the connecting ring 403 to move, and the piston arm 413 is pulled by the positioning pin 414 to move, and then the piston body 411 is pulled by the piston arm 413 to move; when moving in the opposite direction, the piston body 411 is pushed by the piston arm 413 to move inside the sampling barrel 202. In addition, a limiting protrusion 415 is provided on the positioning pin 414, and the limiting protrusion 415 is telescopically provided on the positioning pin 414; when installing the first adjustment group 401 and the second adjustment group 402, first connect and fix the connecting ring 403 to the positioning pin 414 on the first adjustment group 401, then put the first adjustment group 401 into the sampling bucket 202, and finally push the second adjustment group 402 into the sampling bucket 202 from the other end of the sampling bucket 202; after the first adjustment group 401 and the second adjustment group 402 are both placed in the center position of the sampling bucket 202, The positioning pin 414 on the second adjustment group 402 is inserted into the connecting ring 403 through the mounting hole on the sampling barrel 202; and the other end of the adjustment rod 301 is threadedly connected to the connecting ring 403; it should be noted that the adjustment rod 301 is fitted with a cover to seal the mounting hole on the sampling barrel 202; of course, the wire connecting the vibration device 700 needs to pass through the cover and connect to the controller 500; in this invention, the cover is provided with a sealing ring, which seals the cover and the mounting hole when connected to the mounting hole.
[0031] like Figure 6 As shown, the annular airbag 2333 is provided with several positioning posts 2334, and the groove 2332 is provided with several positioning holes 2335. In the installed state, the positioning posts 2334 pass through the positioning holes 2335. In this invention, the positioning posts 2334 and the positioning holes 2335 are interference-fitted, thereby ensuring the stability of the annular airbag 2333 placed in the groove 2332 and preventing it from detaching from the groove 2332 after inflation. The number of positioning posts 2334 and positioning holes 2335 depends on the actual situation and will not be further described in this invention. In addition, after the annular airbag 2333 is inflated, its outer side contacts the inner wall of the sampling bucket 202 and seals the sampling bucket 202 with the sealing cap 2331. When it is necessary to open the sealing cap 2331, the solenoid valve is closed, and the connection between the air tube and the solenoid valve is disconnected. After the gas in the annular airbag 2333 is discharged from the air tube, the sealing cap 2331 can be opened. like Figure 13As shown, the controller 500 can be installed on the shore and connected to the gas cylinder 600, vibration device 700, limit body 304 and power supply 303 via wires to control each part. The controller 500 can also be installed inside the sampling arm 201 and connected to the gas cylinder 600, vibration device 700, limit body 304 and power supply 303 via control lines. However, when the controller 500 is placed on the sampling arm 201, a waterproof layer needs to be installed on the outside of the controller 500 to protect it. In this invention, the controller 500 is preferably a PLC control board. Before entering the water, press and rotate the adjusting rod 301 to adjust the first adjusting group 401 and the second adjusting group 402, thus adjusting the volume of the sampling bucket 202. When the adjusting rod 301 is pressed, the handle on the rod contacts the pressure sensor on the sampling arm 201 (located at the top of the arm near the handle), generating an action signal (when the pressure of the handle on the pressure sensor exceeds 5N). This action signal is sent to the controller 500, which then activates the limiting body 304 and positions the limiting head 342 at the limit position. Within the slot 312 on the disc 311, the adjusting rod 301 is released and is limited by the limiting body 304; the adjusting rod 301 is rotated, changing the position of the first adjusting group 401 and the second adjusting group 402; and the positions of the first sealing group 231 and the second sealing group 232 are limited by the first limiting segment 3233 and the second limiting segment 3234, so that the first sealing group 231 and the second sealing group 232 are in the open state; it should be noted that when the adjusting rod 301 is rotated, the limiting disc 311 is limited by the slot 312 and will not rotate simultaneously with the adjusting rod 301; The entire assembly is placed in water. When the lead weight 102 contacts the sampling position, the pressure sensor generates a pressure signal, which is sent to the controller 500. Based on the pressure sensor data, the controller determines whether to activate the vibration device 700. If activation is required, the controller 500 will control the vibration device 700 to operate, assisting the sampling bucket 202 in inserting into the bottom sediment for sampling. After sampling, when the bucket is pulled up by an external lifting device, the controller 500 receives the upward signal from the external lifting device, controls the vibration device 700 to stop, and controls the limit body 304 to move, releasing the limit on the adjusting rod. Under the action of the spring between the first connecting section 3231 and the second connecting section 3232, the adjusting rod 301 moves upward, causing the first limit section 3233 and the second limit section 3234 to move, thus removing the restriction. Under the action of the reset device 233, the first sealing group 231 and the second sealing group 232 are activated and seal both ends of the sampling bucket 202. According to the elasticity of the reset device 233, the controller 500 delays the opening of the solenoid valve on the gas cylinder 600. In this invention, the solenoid valve can be opened after a delay of 3 seconds. This ensures that the annular airbag 2333 will be inflated only after the first sealing group 231 and the second sealing group 232 are closed. After the whole thing is pulled out of the water, the annular airbag 2333 can be deflated by sending a deflation command through the controller 500 or manually, and then the first sealing group 231 or the second sealing group 232 can be opened to take out the sample in the sampling bucket 202.
[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A sediment soil sampler, characterized in that, include: Main frame (101) and lead weight (102) mounted on the main frame (101); Several auxiliary frames (103) are respectively installed on the main frame (101); Several sampling mechanisms (200) are respectively installed on the auxiliary frame (103); The sampling mechanism (200) includes a sampling arm (201), which is mounted on the auxiliary frame (103), and a sampling bucket (202) is mounted on one end of the sampling arm (201). A first cap group (231) and a second cap group (232) are respectively mounted on both ends of the sampling bucket (202), and the first cap group (231) and the second cap group (232) are rotatably connected to the sampling bucket (202). In addition, a reset device (233) is provided between the first cap group (231) and the second cap group (232). The first capping assembly (231) includes a capping body (2331), which is rotatably connected to the sampling bucket (202). The capping body (2331) is provided with a cap handle (2336), and a groove (2332) is provided on the capping body (2331). An annular airbag (2333) is embedded in the groove (2332). The annular airbag (2333) is connected to the gas cylinder (600) on the sampling arm (201) through an air tube. An adjustment device (300) is provided inside the sampling arm (201). One end of the adjustment device (300) passes through the sampling bucket (202) and is connected to the adjustment device inside the sampling bucket (202). The volume inside the sampling bucket (202) is adjusted by changing the position of the adjustment device. In the sampling state, the first cap group (231) and the second cap group (232) are limited by the adjustment device (300). The controller (500) is connected to the adjustment device (300) and the gas cylinder (600) via a control line.
2. The sediment soil sampler according to claim 1, characterized in that, Also includes: A vibration device (700) for causing the sampling barrel (202) to vibrate during its own operation is provided inside the sampling barrel (202) and connected to a controller (500).
3. The sediment soil sampler according to claim 1, characterized in that, The adjustment device (300) includes: An adjusting rod (301) is inserted through the sampling arm (201), and a snap-fit body is provided on the adjusting rod (301). The snap-fit body moves within the sampling arm (201) under the drive of the adjusting rod (301). A power supply unit (303) is disposed inside the sampling arm (201), and a limiter (304) is provided on the power supply unit (303). Both the power supply unit (303) and the limiter (304) are connected to the controller (500).
4. The sediment soil sampler according to claim 3, characterized in that, The snap-fit body includes: An adjustment block (321) is disposed within a limiting block (305) within the sampling arm (201), and an adjustment rod (301) passes through the adjustment block (321) and is threadedly connected to the adjustment block (321). An extension assembly is provided on the adjustment block (321); A limiting group is set on the extension group; in the collection state, the limiting group limits the first cap group (231) and the second cap group (232).
5. The sediment soil sampler according to claim 4, characterized in that, The extension assembly includes a first extension plate (3221) and a second extension plate (3222), which are disposed opposite to each other on the adjustment block (321); The limiting assembly includes a first connecting segment (3231) and a second connecting segment (3232), one end of which is rotatably connected to the first extension plate (3221) and the second extension plate (3222) respectively; the other end is movably connected to the first limiting segment (3233) and the second limiting segment (3234), and the other ends of the first limiting segment (3233) and the second limiting segment (3234) are movably connected to the sampling arm (201) respectively.
6. The sediment sampler according to claim 3, characterized in that, The limiting body (304) includes: Mounting housing (341) is disposed on the power supply body (303); A limiting head (342) is inserted through the mounting housing (341); A cylinder (343) is disposed inside the mounting housing (341) and connected to the gas cylinder (600) via a gas pipe, and an elastic body (344) is disposed between the cylinder (343) and the limiting head (342). The cylinder (343) is connected to the controller (500) via a control line.
7. The sediment soil sampler according to claim 3, characterized in that, The regulating device includes: The first adjustment group (401) and the second adjustment group (402) are arranged opposite to each other inside the sampling bucket (202); A connecting ring (403) is disposed between the first adjusting group (401) and the second adjusting group (402), and one end of the adjusting rod (301) passes through the connecting ring (403).
8. The sediment soil sampler according to claim 7, characterized in that, The first adjustment group (401) includes: A piston body (411) is disposed inside the sampling bucket (202), and a piston plate (412) is disposed on the piston body (411). The piston arm (413) is rotatably connected at one end to the piston plate (412), and a positioning pin (414) is rotatably connected at the other end. The positioning pin (414) passes through the connecting ring (403).
9. The sediment sampler according to claim 8, characterized in that, The positioning pin (414) is provided with a limiting protrusion (415), which is retractably provided on the positioning pin (414).
10. The sediment soil sampler according to claim 1, characterized in that, The annular airbag (2333) is provided with a number of positioning posts (2334), and the groove (2332) is provided with a number of positioning holes (2335). In the installed state, the number of positioning posts (2334) are inserted into the number of positioning holes (2335).