A high-precision water quality stratification sampling device

Abstract

The present invention relates to the field of water quality detection technology, and specifically to a high-precision stratified water quality sampling device, comprising a main body, a plurality of fixed plates provided at the inner top position of the main body, a plurality of installation compartments evenly provided on the circumferential outer wall of the main body, a control mechanism, the control mechanism being provided between the fixed plates, the control mechanism comprising a fixed shell fixedly connected to the inner wall of the fixed plate, a reducer provided at the bottom of the fixed shell, a rope drum rotatably connected inside the fixed shell, an input end at the top of the reducer fixedly connected to the bottom of the rope drum, an output end at the bottom of the reducer fixedly connected to a docking rod, and a sampling mechanism. The present invention achieves high-precision stratified sampling through close cooperation between the control mechanism and the sampling mechanism. The rope drum is driven to rotate by the water body, and the docking rod is driven by the reducer, and its pressure surface acts on the docking surface of the block to accurately control the opening and closing of the water inlet of the water tank, and accurately sample different water layers as needed.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality detection, in particular to a high-precision water quality stratified sampling device. Background Art

[0002] In the field of water quality monitoring and research, stratified sampling of water quality at different depths in water bodies is of great significance. Traditional water quality sampling devices often have relatively simple functions and it is difficult to achieve high-precision stratified sampling operations. For example, some common samplers can only perform single sampling at a specific depth. If water samples at multiple depths are to be obtained, the operation must be repeated many times, which not only consumes a lot of time and manpower, but also easily introduces errors during the repeated operation, resulting in the accuracy and representativeness of water samples at different depths being affected.

[0003] As water quality research deepens, there is a growing demand for exploring the distribution of pollutant concentrations in different water layers, differences in biological community structure, and vertical variations in the physical and chemical properties of water quality. However, most existing stratified sampling devices are unable to accurately control the sampling depth, sequence, and independence of sampling. In some complex aquatic environments, such as the deep sea, large lakes, and river confluences, the water quality varies in complex and diverse vertical directions, making it difficult for traditional devices to meet the requirements for fine stratified sampling of these special water bodies.

[0004] In addition, some existing stratified sampling equipment has complex structure and is inconvenient to operate, requiring professional personnel to operate and maintain it. In addition, the equipment is expensive, which limits its application in a wider range. Summary of the Invention

[0005] The present invention provides a high-precision water quality stratified sampling device to solve the problem mentioned in the above background technology that the traditional water quality sampling device has a single function and is difficult to achieve high-precision stratified sampling operation. It can only sample once at a specific depth, and obtaining water samples at multiple depths requires multiple repeated operations, which is time-consuming and manpower-consuming and easily introduces errors, affecting the accuracy and representativeness of water samples at different depths.

[0006] In order to solve the above technical problems, the present invention adopts a technical solution: providing a high-precision water quality stratified sampling device, comprising a main body, a plurality of fixing plates are provided at the top position of the inner side of the main body, and a plurality of installation compartments are evenly opened on the outer wall of the main body;

[0007] A control mechanism is provided between the fixed plates, comprising a fixed shell fixedly connected to the inner wall of the fixed plate, a reducer provided at the bottom of the fixed shell, a rope drum rotatably connected inside the fixed shell, an input end at the top of the reducer fixedly connected to the bottom of the rope drum, and an output end at the bottom of the reducer fixedly connected to a docking rod;

[0008] A sampling mechanism is slidably installed inside the installation cabin, and the sampling mechanism includes a water intake box slidably connected to the inner wall of the installation cabin, a water inlet is provided through the top of the water intake box, a mounting shell 1 is fixedly connected to the top of the water intake box near the water inlet, a block is slidably connected inside the mounting shell 1, and a support spring is provided at the bottom of the water intake box with the bottom end connected to the inner wall of the installation cabin.

[0009] The present invention is further configured such that a rope outlet is provided through the top of the fixed shell, a fixed shell 2 is fixedly connected to the top of the fixed shell near the rope outlet, a clamping opening is provided through the bottom of the fixed shell 2 corresponding to the rope outlet, a splint is slidably connected to the inside of the clamping opening, and a telescopic rod is provided on the side of the splint away from the clamping opening, one end of which is connected to the inner wall of the fixed shell 2.

[0010] The present invention is further configured such that a suspension rod is provided at the center position of the top of the fixed shell, and a pressure surface is provided at one end of the docking rod away from the reducer.

[0011] The present invention is further configured such that a decompression channel is provided through the center of the main body, and a docking frame is provided in the decompression channel near the docking rod.

[0012] The present invention is further configured such that a filter screen is provided inside the water inlet, and a sewage outlet is provided on an outer wall of the installation shell near the water inlet.

[0013] The present invention is further configured such that a spring one having one end connected to the mounting shell one is provided on one side of the stopper located inside the mounting shell one, and a docking surface is provided on one side of the stopper located outside the mounting shell one.

[0014] The present invention is further configured such that a drainage hole is provided at a position on the bottom of the main body corresponding to the installation cabin, and the drainage hole is communicated with the installation cabin.

[0015] Beneficial effects of the high-precision water quality stratification sampling device of the present invention:

[0016] 1. High-precision stratified sampling is achieved through close cooperation between the control mechanism and the sampling mechanism. The rope drum in the control mechanism is driven by the water body to rotate when the device sinks. After deceleration and adjustment by the reducer, it drives the docking rod to rotate. The pressure surface of the docking rod interacts with the docking surface of the block in the sampling mechanism to precisely control the opening and closing of the water inlet of the water tank. This allows the water tank to be opened and water samples to be collected in different water layers as needed, meeting the requirements for fine stratified sampling in the vertical direction of complex water bodies. This effectively solves the problem of traditional devices that make it difficult to accurately control the sampling depth, sampling sequence, and sampling independence.

[0017] 2. Unlike the traditional method of only being able to take a single sample at a specific depth and repeating the operation multiple times to obtain water samples at multiple depths, this device can be lowered once to control the operation of multiple water tanks in sequence according to different water layers, avoiding the errors introduced by repeated operations, greatly saving time and labor costs, ensuring the accuracy and representativeness of water samples at different depths, and meeting the needs of water quality research for high precision of multiple samples.

[0018] 3. The pressure-reducing channel effectively reduces water resistance during launch, facilitating a smooth descent to the target water layer. The drainage hole facilitates the emptying of accumulated water within the installation chamber during ascent, ensuring easy recovery. The telescopic rod and clamping plate within the second fixed housing flexibly clamp or release the rope based on the docking rod's status, precisely controlling the device's retention and sampling in each water layer. Combined with sensors within the reducer to monitor the docking rod's movement, this enables automated process control, ensuring an efficient and orderly sampling process.

[0019] 4. The water inlet of the sampling mechanism is equipped with a filter to prevent foreign matter from entering the water tank. After the docking rod is separated from the block, the spring pushes the block to reset, which can clean the foreign matter accumulated in the filter, maintain smooth water inlet, extend the service life of the device, ensure the purity of the sampled water quality, and improve the reliability of the test data.

[0020] 5. The water tank utilizes its own buoyancy and bottom support springs to achieve optimal mechanical balance in the water. Upon initial entry into the water, buoyancy and spring force cause the tank to rise to the top of the mounting chamber. As water is sampled, the tank slowly sinks as the weight of the water increases, compressing the support springs until the sampling process is complete. This mechanism ensures stable operation of the tank at all stages, adapting to changes in water pressure and buoyancy at different depths, and facilitating precise stratified sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, a detailed description is given below with reference to the accompanying drawings.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0023] Figure 1 This is a three-dimensional structural diagram of a high-precision water quality stratification sampling device of the present invention;

[0024] Figure 2 This is an exploded view of a high-precision water quality stratification sampling device of the present invention;

[0025] Figure 3 This is a cross-sectional view of a high-precision water quality stratification sampling device of the present invention;

[0026] Figure 4 This is a cross-sectional view of a control mechanism of a high-precision water quality stratification sampling device of the present invention;

[0027] Figure 5 This is an exploded diagram of the sampling mechanism of a high-precision water quality stratification sampling device of the present invention.

[0028] The following are marked in the figure:

[0029] 1. Main body; 11. Fixing plate; 12. Installation compartment; 13. Drain hole; 14. Decompression channel;

[0030] 15. Sampling mechanism; 151. Water collection tank; 152. Support spring; 153. Water inlet; 1531. Filter; 154. Mounting shell 1; 1541. Drain outlet; 155. Stopper; 1551. Docking surface; 156. Spring 1;

[0031] 16. Control mechanism; 161. Fixed shell; 162. Rope drum; 163. Speed ​​reducer; 164. Docking rod; 1641. Pressing surface; 165. Rope outlet; 166. Fixed shell 2; 1661. Telescopic rod; 1662. Clamping mouth; 1663. Clamping plate; 167. Suspension rod. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other; the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left" and "right" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the positions or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limitations of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, unless otherwise expressly specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or a transmission connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two elements or the interaction relationship between two elements.

[0034] See also Figure 1-Figure 5 A high-precision water quality stratified sampling device includes a main body 1, a plurality of fixing plates 11 are arranged at the top position of the inner side of the main body 1, and a plurality of installation cabins 12 are evenly opened on the outer wall of the main body 1;

[0035] The control mechanism 16 is arranged between the fixed plates 11 and includes a fixed shell 161 fixedly connected to the inner wall of the fixed plate 11. A reducer 163 is provided at the bottom of the fixed shell 161. A rope drum 162 is rotatably connected inside the fixed shell 161. The input end at the top of the reducer 163 is fixedly connected to the bottom of the rope drum 162. The output end at the bottom of the reducer 163 is fixedly connected to the docking rod 164.

[0036] The sampling mechanism 15 is slidably installed inside the installation cabin 12. The sampling mechanism 15 includes a water intake box 151 that is slidably connected to the inner wall of the installation cabin 12. A water inlet 153 is provided on the top of the water intake box 151. A mounting shell 154 is fixedly connected to the top of the water intake box 151 near the water inlet 153. A stopper 155 is slidably connected inside the mounting shell 154. A support spring 152 is provided at the bottom of the water intake box 151, the bottom end of which is connected to the inner wall of the installation cabin 12.

[0037] By adopting the above technical solution, the main body 1 serves as the basic structure of the device. The fixed plate 11 at the top of the inner side firmly supports the control mechanism 16, and the installation chamber 12 on the outer circumferential wall is used for the sliding installation of the sampling mechanism 15, ensuring the orderly operation of all components. In the control mechanism 16, the fixed shell 161 is connected to the fixed plate 11. The internal rope drum 162 rotates and is dragged by the water. The speed is regulated by the bottom reducer 163, driving the docking rod 164 to rotate and control the sampling. The top rope outlet 165 cooperates with the fixed shell 166, the telescopic rod 1661, and the clamping plate 1663 to achieve rope fixation and control the sampling process. The water intake tank 151 of the sampling mechanism 15 adjusts its position in the installation chamber 12 based on buoyancy and support springs 152. The water inlet 153 is controlled to open and close by the block 155. The filter 1531 is used to prevent foreign objects. The spring 156 helps the block 155 to reset the cleaning net to ensure accurate stratified sampling.

[0038] A rope outlet 165 is formed through the top of the fixed shell 161, and a second fixed shell 166 is fixedly connected to the top of the fixed shell 161 near the rope outlet 165. A clamping opening 1662 is formed through the bottom of the second fixed shell 166 corresponding to the rope outlet 165, and a splint 1663 is slidably connected to the inside of the clamping opening 1662. A telescopic rod 1661 is provided on the side of the splint 1663 away from the clamping opening 1662, one end of which is connected to the inner wall of the second fixed shell 166.

[0039] By adopting the above technical solution, the rope outlet 165 at the top of the fixed shell 161 is used for the rope to pass through so that it can be connected and fixed to the outside, ensuring that the device sinks in the water and the sampling process proceeds smoothly. A fixed shell 2 166 is provided near the rope outlet 165. Its bottom clamp 1662 and the internal sliding splint 1663, together with the telescopic rod 1661 with one end connected to the inner wall of the fixed shell 2 166, play a role at the key node of the device sampling. When the docking rod 164 touches the block 155 to a specific state, the sensor of the reducer 163 triggers the telescopic rod 1661 to push the splint 1663 to clamp the rope, thereby stabilizing the sinking of the device. After the sampling is completed, the splint 1663 can be pulled back to loosen the rope and continue the layered sampling process.

[0040] A suspension rod 167 is provided at the top center of the fixed shell 161 , a pressing surface 1641 is provided at one end of the docking rod 164 away from the reducer 163 , and a docking surface 1551 is provided on one side of the stopper 155 located outside the mounting shell 154 .

[0041] By adopting the above technical solution, the suspension rod 167 at the top center of the fixed shell 161 is the key part for connecting the lifting rope, which allows the device to be steadily placed in the water to start the sampling process. The pressure surface 1641 of the docking rod 164 at the end away from the reducer 163 is specially designed to cooperate with the docking surface 1551 of the stopper 155. When the device sinks, the docking rod 164 rotates, and the pressure surface 1641 squeezes the docking surface 1551 of the stopper 155, pushing the stopper 155 to move, opening the water inlet 153 of the water tank 151 to collect water samples. The two can be locked and fixed to control the sampling rhythm.

[0042] A filter screen 1531 is provided inside the water inlet 153, a sewage outlet 1541 is provided on the outer wall of the mounting shell 154 near the water inlet 153, and a spring 156 is provided on one side of the stopper 155 located inside the mounting shell 154 with one end connected to the mounting shell 154.

[0043] By adopting the above technical solution, the filter 1531 inside the water inlet 153 effectively blocks the entry of impurities and foreign matter in the water when the water sample is collected from the water tank 151, thereby ensuring the purity of the water sample and facilitating the accurate implementation of subsequent water quality testing. The sewage outlet 1541 on the outer wall of the installation shell 154, close to the water inlet 153, facilitates the discharge of foreign matter when the block 155 is reset to clean the filter 1531 and maintains a good sampling state for the device. The spring 156 inside the installation shell 154 of the block 155 can promptly push the block 155 back to its original position after the docking rod 164 separates from the block 155, thereby closing the water inlet 153 to end the current sampling and cleaning the filter 1531 to prepare for the next sampling.

[0044] A decompression channel 14 is provided through the center of the main body 1 , and a docking frame is provided inside the decompression channel 14 near the docking rod 164 . A drainage hole 13 is provided at the bottom of the main body 1 corresponding to the installation cabin 12 , and the drainage hole 13 is connected to the installation cabin 12 .

[0045] By adopting this technical solution, the main body 1 has a decompression channel 14 extending through its center. During launch, the internal docking frame mates with the bottom of the docking rod 164, enabling smooth rotation of the rod 164, reducing water resistance and ensuring the device's smooth descent to the target water layer. Drain holes 13 at the bottom of the main body 1, corresponding to the installation chamber 12, are connected to the chamber. This effectively drains accumulated water from the chamber 12 during the device's ascent, reducing the device's weight and facilitating recovery. These two functions work together to optimize the device's launch and recovery processes.

[0046] The working principle and usage process of the embodiment of the present invention are as follows:

[0047] The decompression channel 14 is used to reduce the resistance of water when the device is launched into the water. The drainage hole 13 is convenient for draining the water in the installation cabin 12 when the device rises. The docking frame inside the decompression channel 14 is in contact with the bottom of the docking rod 164 to maintain the smooth rotation of the docking rod 164. The lifting rod 167 is used to connect the connecting rope for lifting the device. The rope drum 162 is used to place the coiled rope. One end of the rope extends to the outside of the control mechanism 16 through the clamping mouth 1662 of the rope outlet 165. At the same time, one end of the rope must be connected to the east and west for fixation. The telescopic rod 1661 in the fixed shell 166 is used to push the splint 1663, and the rope is clamped and fixed by pushing the splint 1663 to move.

[0048] When the water inlet 153 is exposed, the pressure surface 1641 is stuck with the docking surface 1551, so that the docking rod 164 cannot move. A sensor is provided in the reducer 163. When the sensor senses that the docking rod 164 cannot move, the telescopic rod 1661 pushes the splint 1663 to clamp the rope and prevent the device from sinking.

[0049] After the device stays in place, the water intake 153, with the water intake tank 151 exposed, will collect the current water layer. When the water intake tank 151 is submerged in water, the bucket will be subjected to an upward buoyancy in the water due to its own buoyancy. At the same time, the support spring 152 at the bottom will also generate an upward elastic force on the bucket. The combined force of these two forces causes the bucket to float upward and eventually stop at the top of the installation cabin 12. At this time, the buoyancy is greater than or equal to the sum of the weight of the bucket and the spring force, reaching a state of equilibrium. When the bucket begins to take in water, the weight of the bucket gradually increases. According to the buoyancy formula, as the water slowly fills the water intake tank 151, the weight of the bucket increases, causing the weight of the bucket to sink and slowly sink. The pressure on the support spring 152 gradually increases, and the support spring 152 is slowly compressed until the block 155 falls and separates from the docking rod 164.

[0050] When the docking rod 164 is not blocked and the sensor is not blocked, the telescopic rod 1661 will pull the splint 1663 to loosen the clamp on the rope and continue to repeat the above steps. Different water tanks 151 are opened to collect water sources according to different water layers. The filter screen 1531 in the water inlet 153 is used to prevent foreign matter from entering the water tank 151. After the docking rod 164 is separated from the block 155, the spring 156 will push the block 155 to reset. At the same time as the block 155 is reset, the foreign matter accumulated on the filter screen 1531 will be cleaned. By adjusting the transmission speed of the reducer 163, the water tank 151 can be controlled to open and collect water sources in water layers of different depths.

[0051] In summary, compared with the prior art, the embodiments of the present invention have the following advantages:

[0052] Advantage 1: The present invention breaks through traditional limitations by using a uniquely designed control mechanism 16 and sampling mechanism 15 to work in coordination. In the control mechanism 16, the rope drum 162 rotates as the device sinks, driven by the water body. Its rotation is precisely regulated by the reducer 163 and transmitted to the docking rod 164. The pressure surface 1641 of the docking rod 164 precisely fits and interacts with the docking surface 1551 of the block 155 on the water tank 151 in the sampling mechanism 15. This close connection can trigger the water inlet 153 of the water tank 151 to open in an orderly manner according to the preset conditions in different water layers, and collect water samples from each layer one by one, avoiding the errors caused by the traditional repeated operation of a single sampler. It efficiently and accurately meets the needs of vertical multi-depth fine sampling of complex water bodies, and solves the problem that existing stratified sampling devices are difficult to control the sampling depth, sampling sequence and independence.

[0053] Advantage 2: Main body 1 is equipped with a pressure relief channel 14 and a drainage hole 13, which complement each other. Pressure relief channel 14 plays a key role during the device's submerged sinking phase. Its internal docking frame assists the docking rod 164 in rotating smoothly while effectively reducing water resistance, ensuring the device reaches the target water layer smoothly and quickly. Drain hole 13, on the other hand, is particularly useful during the device's ascent, promptly draining accumulated water from the installation chamber 12, reducing the device's weight and making the recovery process convenient and efficient. The overall structural design meets the requirements of the entire process, surpassing traditional devices with a single structure and function.

[0054] Advantage 3: Reducer 163 has a built-in sensor, which forms an intelligent linkage mechanism with the telescopic rod 1661 and clamping plate 1663 in fixed housing 166. When the docking rod 164 contacts the stopper 155 according to the process in the corresponding water layer and becomes stuck, the sensor immediately captures the signal, prompting the telescopic rod 1661 to push the clamping plate 1663 to clamp the rope, stabilizing the device and allowing sampling. When sampling is completed, the docking rod 164 separates from the stopper 155, and the sensor again sends a command to release the clamping plate 1663, allowing the device to continue sinking. Fully automated intelligent speed and position control ensures easy operation, eliminating the need for complex debugging by specialized personnel, overcoming the drawbacks of traditional complex equipment that requires cumbersome operation and dedicated maintenance.

[0055] Advantage 4: In sampling mechanism 15, a filter 1531 is installed at water inlet 153, acting as a solid defense against foreign matter from entering water collection tank 151, ensuring water sample purity and improving the accuracy of water quality testing. Even more ingenious, when sampling in water collection tank 151 is completed and docking rod 164 separates from stopper 155, spring 156 pushes stopper 155 back into place, cleverly clearing accumulated foreign matter from filter 1531, maintaining its long-term filtration efficiency and continuously safeguarding water sample quality. This self-cleaning feature is a rare advantage found in traditional sampling devices.

[0056] Advantage 5: The support spring 152 at the bottom of the water tank 151 works seamlessly with its own buoyancy. Upon initial entry into the water, the buoyancy and support spring 152 combine to lift the water tank 151 to the top of the installation chamber 12, maintaining a stable initial position. During sampling, as water is added, the weight of the water tank 151 gradually increases, disrupting its equilibrium and causing it to begin sinking. The support spring 152 cushions and adapts as needed until sampling is complete. The dynamic changes in buoyancy, gravity, and elasticity stabilize the water tank 151 throughout the entire process, accommodating differences in water pressure and buoyancy across different water layers and facilitating precise stratified sampling, a feat unmatched by conventional devices lacking such sophisticated mechanical design.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A high-precision water quality stratification sampling device, characterized in that: include: A main body (1), wherein a plurality of fixing plates (11) are provided at the top of the inner side of the main body (1), and a plurality of installation compartments (12) are evenly provided on the circumferential outer wall of the main body (1); A control mechanism (16), wherein the control mechanism (16) is arranged between the fixed plates (11), the control mechanism (16) comprises a fixed shell (161) fixedly connected to the inner wall of the fixed plate (11), a reducer (163) is provided at the bottom of the fixed shell (161), a rope drum (162) is rotatably connected inside the fixed shell (161), an input end at the top of the reducer (163) is fixedly connected to the bottom of the rope drum (162), an output end at the bottom of the reducer (163) is fixedly connected to a docking rod (164), and a pressure surface (1641) is provided at one end of the docking rod (164) away from the reducer (163); The top of the fixed shell (161) is provided with a rope outlet (165), the top of the fixed shell (161) is fixedly connected to a second fixed shell (166) at a position close to the rope outlet (165), the bottom of the second fixed shell (166) is provided with a clamping opening (1662) at a position corresponding to the rope outlet (165), the inside of the clamping opening (1662 is slidably connected to a clamping plate (1663), and a telescopic rod (1661) is provided on a side of the clamping plate (1663) away from the clamping opening (1662), one end of which is connected to the inner wall of the second fixed shell (166). A sampling mechanism (15), wherein the sampling mechanism (15) is slidably mounted inside the installation chamber (12), the sampling mechanism (15) comprises a water collection box (151) slidably connected to the inner wall of the installation chamber (12), a water inlet (153) is provided through the top of the water collection box (151), a mounting shell (154) is fixedly connected at a position near the water inlet (153) on the top of the water collection box (151), a stopper (155) is slidably connected inside the mounting shell (154), and a support spring (152) is provided at the bottom of the water collection box (151), the bottom end of which is connected to the inner wall of the installation chamber (12); The stopper (155) is located on one side inside the mounting shell (154) and is provided with a spring (156) having one end connected to the mounting shell (154). The stopper (155) is located on one side outside the mounting shell (154) and is provided with a docking surface (1551). When the device enters the water and sinks, the rope drum (162) rotates and drives the reducer (163) to drive the docking rod (164) to rotate and move toward the stopper (155), so that the pressure surface (1641) squeezes the docking surface (1551), and the water inlet (153) is opened. At this time, the pressure surface (1641) and the docking surface (1551) are engaged with each other to limit the docking rod (164) from continuing to rotate. When the sensor senses that the docking rod (164) cannot move, the telescopic rod (1661) extends and pushes the splint (1663) to clamp the rope, so that the device stops sinking. The gravity of the water tank (151) gradually increases, and the support spring (152) is compressed until the stopper (155) is separated from the docking rod (164). When the sensor senses that the docking rod (164) is unobstructed, the telescopic rod (1661) shortens and pulls the splint (1663) to reset to loosen the rope, and the device continues to sink, thereby realizing water source collection in different water layers.

2. A high-precision water quality stratification sampling device according to claim 1, characterized in that: A suspension rod (167) is provided at the center of the top of the fixed shell (161).

3. A high-precision water quality stratification sampling device according to claim 1, characterized in that: A decompression channel (14) is provided through the center of the main body (1), and a docking frame is provided in the decompression channel (14) near the docking rod (164).

4. A high-precision water quality stratification sampling device according to claim 1, characterized in that: A filter screen (1531) is provided inside the water inlet (153), and a sewage outlet (1541) is provided on the outer wall of the first mounting shell (154) near the water inlet (153).

5. A high-precision water quality stratification sampling device according to claim 1, characterized in that: A drainage hole (13) is provided at a position on the bottom of the main body (1) corresponding to the installation chamber (12), and the drainage hole (13) is in communication with the installation chamber (12).

Images