Portable water sample collecting device

Abstract

The invention provides a portable water sample collection device, and belongs to the technical field of water sample collection, the portable water sample collection device comprises a sampler and a placement box, the placement box is composed of a box body and a box cover, and the portable water sample collection device further comprises a multi-layer sampling assembly, a shunt filtering assembly and a cleaning assembly; according to the invention, multi-layer sewage samples can be collected, automatic sampling can be realized after a water layer is selected in the collection process, and then the samples are directly enriched on a specific adsorption film and then detected according to requirements, so that the sample is convenient to store and carry; water in a sampling area is injected into a relatively closed interval, so that the influence of external environmental factors on sampling is effectively avoided; the split-flow filtering assembly filters a water sample in a multi-layer mode, the cleaning assembly cleans the second filter cylinder through a banister brush and dredges the first filter cylinder through an elastic magnetic plate, it is guaranteed that the water sample can be fully filtered all the time, meanwhile, aquatic organisms such as fishes and shrimps can be driven through sound made by the elastic magnetic plate, and the accuracy and reliability of the sampling result are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of water sample collection, and more specifically, to a portable water sample collection device. Background Art

[0002] With the acceleration of industrialization and urbanization, various water bodies (such as rivers, lakes, oceans, groundwater, etc.) are facing different degrees of pollution threats. In order to accurately understand the quality status of water bodies, it is necessary to regularly collect water samples and analyze various components therein, including chemical substances (such as heavy metals, organic substances, nutrient salts, etc.), physical properties (such as temperature, turbidity, dissolved oxygen, etc.), and microbial indicators. Water sample collection devices have become key tools for obtaining representative water samples in order to scientifically evaluate water quality and determine whether it meets corresponding environmental quality standards or utilization standards.

[0003] Most current water sample collection devices have the following disadvantages in actual use. Firstly, many traditional water sample collection devices are relatively simple in design and can often only collect water samples at a certain specific depth or obtain the overall mixed water sample. It is difficult to achieve stratified collection of water samples at different depths in the same batch operation. If multi-layer sampling is desired, multiple separate samplings are required, which not only has sampling errors but also is time-consuming and laborious. Additionally, in the water body environment, surface transverse waves are a relatively common phenomenon. Transverse waves can cause horizontal shaking and flow of the water body, which may cause the position of the sampling device originally accurately placed at the predetermined sampling point to shift. For example, originally planned to collect water samples at a certain specific location, but the push of the transverse wave may cause the sampling device to deviate from this point, resulting in the collected water sample not coming from the expected accurate location, affecting the representativeness of the water sample and being unfavorable for accurate analysis of the water quality in a specific area, causing inaccurate detection results.

[0004] How to invent a portable water sample collection device to solve these problems has become an urgent problem for those skilled in the art. Summary of the Invention

[0005] To make up for the above deficiencies, the present invention provides a portable water sample collection device, aiming to solve the problems mentioned in the above background.

[0006] The present invention is implemented as follows: The present invention provides a portable water sample collection device, including a sampler and a placement box. The placement box is composed of a box body and a box cover. A placement cavity for placing the sampler is provided inside the box body. A water depth sensor is provided on the sampler, and further includes: A multi-layer sampling assembly: The multi-layer sampling assembly is provided on the sampler, and the multi-layer sampling assembly can collect water samples at multiple layers in the same batch; Shunt filtering component: The shunt filtering component is arranged at the lower end of the multi-layer sampling component. The shunt filtering component can protect the sampler during sampling and can also perform multi-layer filtration on the water sample; Cleaning component: The cleaning component is arranged inside the shunt filtering component. The cleaning component can clean the shunt filtering component during sampling and can also prevent interference from fish and shrimp in the water to sampling.

[0007] Preferably, the multi-layer sampling component includes a lower mounting plate, an upper mounting plate, a connecting plate, a sampling bottle and an electric cylinder. The sampling bottle is installed between the lower mounting plate and the upper mounting plate. The electric cylinder is fixedly installed on the upper mounting plate. The output end of the electric cylinder penetrates through the side wall of the upper mounting plate and extends into the interior of the sampling bottle. The output end of the electric cylinder located inside the sampling bottle is fixedly connected with a piston. The piston is in sealed sliding connection with the inner wall of the sampling bottle. The side wall of the electric cylinder away from the upper mounting plate is fixedly connected with the bottom wall of the connecting plate. The top of the connecting plate is fixedly connected with a connecting seat. A suspension rope is sleeved on the connecting seat. The end of the suspension rope is connected to an external support device.

[0008] Preferably, an installation table is fixedly connected to the lower mounting plate located inside the sampling bottle. A water inlet is opened on the installation table. The end of the water inlet penetrates through the side walls of the installation table and the lower mounting plate. A baffle for blocking the water inlet is installed on the installation table. A drain pipe is connected through the side wall of the sampling bottle near the installation table. A clamping seat is fixedly connected to the side wall of the sampling bottle. The upper end of the drain pipe is clamped on the clamping seat. A plug cap is inserted and installed at the end of the drain pipe.

[0009] Preferably, there are three sampling bottles and electric cylinders, which are distributed in a triangular shape. The water depth sensor is electrically connected to the electric cylinder. In the initial state, the baffle completely blocks the water inlet, and the piston is at the bottom of the sampling bottle. When the piston rises, a negative pressure area is formed in the sampling bottle to open the baffle and complete the suction sampling operation through the water inlet. After sampling, under the action of the gravity of the water body, the baffle blocks the water inlet again.

[0010] Preferably, the shunt filtering component includes a water baffle, a diversion hopper, a second filter cylinder and a first filter cylinder. The water baffle is fixedly connected to the bottom wall of the lower mounting plate. The water baffle extends vertically downward along the outer edge line of the lower mounting plate. The diversion hopper is fixedly connected to the lower end of the water baffle. The diversion hopper is recessed downward towards the center of the bottom side of the lower mounting plate. A first filter cylinder is fixedly connected to the center of the diversion hopper. The first filter cylinder abuts against the bottom wall of the lower mounting plate. A conical cylinder is fixedly connected to the lower end of the first filter cylinder. Filter grooves are formed through the first filter cylinder and the conical cylinder. Multiple groups of leakage grooves are annularly opened at the corners of the diversion hopper.

[0011] Preferably, the water baffle is made of rubber material. A plurality of mounting grooves are provided at the bottom of the lower mounting plate. The first filter cartridge is located at the center of the plurality of mounting grooves. The mounting grooves surround the outer sides of the corresponding water inlets. The upper end of the second filter cartridge is provided with internal threads. External threads meshing with the internal threads at the upper end of the second filter cartridge are provided in the mounting grooves. The second filter cartridge is located inside the space surrounded by the water baffle, the diversion hopper and the lower mounting plate. The pore diameter of the mesh holes of the second filter cartridge is smaller than the pore diameter of the filter tank.

[0012] Preferably, the cleaning assembly includes a limiting shaft and an elastic magnetic plate. The limiting shaft is rotationally clamped to the bottom of the lower mounting plate. The lower end of the limiting shaft penetrates through the side wall of the second filter cartridge. A fan blade is fixedly connected to the limiting shaft located inside the second filter cartridge. The elastic magnetic plate is fixedly connected to the bottom wall of the lower mounting plate. The elastic magnetic plate surrounds the outside of the first filter cartridge. A bracket is fixedly installed at the end of the limiting shaft located outside the second filter cartridge. A soft brush is fixedly connected to one side of the bracket facing the second filter cartridge. A magnetic block is fixedly installed on the vertical side wall of the bracket.

[0013] Preferably, the blades of the fan blade are made of inclined light material. The cross section of the bracket is L-shaped. The end of the soft brush abuts against the side wall of the second filter cartridge. The lower end of the elastic magnetic plate in the initial state abuts against the side wall of the first filter cartridge. The opposite surfaces of the magnetic block and the elastic magnetic plate are magnetized with different polarities. There is a gap between the bracket and the elastic magnetic plate when the bracket rotates around the second filter cartridge.

[0014] The beneficial effects of the present invention are as follows: All components of the present invention are integrated in the box, which is convenient to carry. Moreover, it can collect multiple sewage samples. After selecting the water layer during the collection process, automatic sampling can be achieved, improving the sampling efficiency and reducing the contact between the sampling personnel and potential sewage. At the same time, after the water sample is collected, according to the requirements of the detection index, it is directly enriched on a specific adsorption membrane and then taken back to the laboratory for detection, which is convenient for storage and carrying. By injecting the water body in the sampling area into a relatively closed interval (such as the space surrounded by the diversion hopper, etc.), the influence of external environmental factors (such as wind waves, external water flow, impurities, etc.) on sampling is effectively avoided, alleviating problems such as sampling position deviation and the mixing of irrelevant components into the water sample, and improving the quality and reliability of water sample collection.

[0015] In the shunt filtration assembly, components such as the water baffle, diversion hopper, first filter cartridge, and second filter cartridge cooperate with each other to filter the water sample in multiple levels and steps. The water baffle and diversion hopper guide the water flow into the filtration process in an orderly manner. The first filter cartridge conducts preliminary filtration, and the second filter cartridge conducts further fine filtration, effectively removing various impurities, improving the purity of the water sample, and providing a more accurate and reliable water sample for subsequent operations such as water quality analysis. The cleaning assembly prevents the first filter cartridge and the second filter cartridge from being blocked by impurities and affecting the filtration effect through the cleaning of the second filter cartridge by the soft brush and the dredging of the first filter cartridge by the elastic magnetic plate, ensuring that the water sample can smoothly pass through the filtration assembly, maintaining the normal filtration function, ensuring that the water sample can always be fully filtered. At the same time, it can also use the sound emitted by the elastic magnetic plate to drive aquatic organisms such as fish and shrimps away, avoiding the interference of these organisms on the sampling process, such as changing the water flow path, mixing in impurities, blocking the equipment, etc., and further ensuring the accuracy and reliability of the sampling results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a schematic diagram of the overall structure of a portable water sample collection device provided by the present invention; Figure 2 is a schematic diagram of the structure of a portable water sample collection device when it is stored; Figure 3 is a schematic diagram of the sampler and the placement box of a portable water sample collection device provided by the present invention; Figure 4 is a schematic diagram of the structure of the diversion hopper of a portable water sample collection device provided by the present invention; Figure 5 is a schematic diagram of the internal structure of the water baffle of a portable water sample collection device provided by the present invention; Figure 6 is a schematic diagram of a partial sectional structure of a portable water sample collection device provided by the present invention; Figure 7 is a front view schematic diagram of a partial sectional structure of a portable water sample collection device provided by the present invention; Figure 8 is a schematic diagram of the structure of the sampler when collecting water of a portable water sample collection device provided by the present invention; Figure 9 is a schematic diagram of a partial exploded structure of a portable water sample collection device provided by the present invention.

[0018] In the figure: 1. Sampler; 2. Placing box; 3. Sampling bottle; 4. Electric cylinder; 5. Water baffle; 6. Second filter cartridge; 7. Limit shaft; 8. Bracket; 11. Lower mounting plate; 12. Upper mounting plate; 13. Connecting plate; 14. Connecting seat; 15. Suspension rope; 20. Placing cavity; 21. Box body; 22. Box cover; 31. Drain pipe; 32. Card seat; 41. Piston; 51. Diversion hopper; 52. Leakage groove; 53. First filter cartridge; 54. Conical cylinder; 55. Filter groove; 61. Installation groove; 71. Fan blade; 81. Magnet; 82. Elastic magnetic plate; 111. Installation table; 112. Water inlet; 113. Cover; 311. Plug cap. Specific embodiments

[0019] To make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Example 1, Example 1, refer to Figures 1 - 4 , a portable water sample collection device, including a sampler 1 and a placing box 2. The placing box 2 is composed of a box body 21 and a box cover 22. A placing cavity 20 for placing the sampler 1 is provided inside the box body 21. The placing box 2 is used to store the sampler 1, playing a role in protecting the sampler 1 and facilitating carrying and transportation. A water depth sensor is provided on the sampler 1, and the water depth sensor is used to measure the water depth to ensure that water samples are collected at an appropriate depth. It also includes: Multi-layer sampling component: The multi-layer sampling component is arranged on the sampler 1, and the multi-layer sampling component can collect multi-layer water samples in the same batch; Shunt filtering component: The shunt filtering component is arranged at the lower end of the multi-layer sampling component. The shunt filtering component can protect the sampler 1 during sampling, and at the same time can perform multi-layer filtering treatment on the water sample; Cleaning component: The cleaning component is arranged inside the shunt filtering component. The cleaning component can clean the shunt filtering component during sampling, and at the same time can avoid the interference of fish and shrimp in the water on sampling.

[0021] Furthermore, the multi-layer sampling assembly includes a lower mounting plate 11, an upper mounting plate 12, a connecting plate 13, a sampling bottle 3, and an electric cylinder 4. The sampling bottle 3 is installed between the lower mounting plate 11 and the upper mounting plate 12. The electric cylinder 4 is fixedly installed on the upper mounting plate 12. The output end of the electric cylinder 4 penetrates through the side wall of the upper mounting plate 12 and extends into the interior of the sampling bottle 3. A piston 41 is fixedly connected to the output end of the electric cylinder 4 located inside the sampling bottle 3. The piston 41 is in sealed sliding connection with the inner wall of the sampling bottle 3. When the piston 41 rises, a negative pressure area will be formed inside the sampling bottle 3. This negative pressure enables the external water sample to enter the sampling bottle 3 through the corresponding water inlet channel (i.e., the water inlet 112 in the following text), thereby realizing the collection of the water sample. By controlling the operation of the electric cylinder 4, the sampling volume and sampling time can be accurately controlled. The side wall of the electric cylinder 4 far from the upper mounting plate 12 is fixedly connected to the bottom wall of the connecting plate 13. A connecting seat 14 is fixedly connected to the top of the connecting plate 13. A lifting rope 15 is sleeved on the connecting seat 14. The end of the lifting rope 15 is connected to an external support device. The external support device can be a crane on a sampling ship or other equipment capable of providing a lifting function. Through the lifting rope 15, the entire sampler 1 can be lowered to a specified depth in the water body for sampling and then lifted up, conveniently and quickly completing the multi-layer water sample collection task.

[0022] A mounting table 111 is fixedly connected to the lower mounting plate 11 inside the sampling bottle 3. A water inlet 112 is opened on the mounting table 111. The end of the water inlet 112 penetrates through the side walls of the mounting table 111 and the lower mounting plate 11. A baffle 113 for blocking the water inlet 112 is installed on the mounting table 111. A drain pipe 31 is connected through the side wall of the sampling bottle 3 close to the mounting table 111. A clamping seat 32 is fixedly connected to the side wall of the sampling bottle 3. The upper end of the drain pipe 31 is clamped on the clamping seat 32. A plug cap 311 is inserted and installed at the end of the drain pipe 31 to ensure that the water flow inside the sampling bottle 3 will not flow out.

[0023] It should be noted that three sampling bottles 3 and electric cylinders 4 are provided and distributed in a triangular shape. Multiple sampling bottles 3 can collect water samples at different depths, realizing the one-time collection of multi-layer water samples, which is very useful for situations where it is necessary to analyze the water quality differences at different depths of the water body. For example, studying the pollutant distribution in different water layers of a lake or a reservoir. The water depth sensor is electrically connected to the electric cylinder 4. After reaching the specified depth, the water depth sensor will send a signal to the electric cylinder 4 to control the sampling. In the initial state, the baffle 113 completely blocks the water inlet 112, and the piston 41 is at the bottom of the sampling bottle 3. At this time, the water flow cannot enter the sampling bottle 3. When the piston 41 rises, a negative pressure area is formed inside the sampling bottle 3 to open the baffle 113 and complete the suction sampling operation through the water inlet 112. After the sampling is completed, under the action of the gravity of the water body, the baffle 113 blocks the water inlet 112 again.

[0024] In this embodiment, first, open the placement box 2, take out the sampler 1, connect the other end of the suspension rope 15 to an external support device (such as a crane on a sampling ship). In the initial state, the baffle 113 completely blocks the water inlet 112 to prevent water from flowing into the sampling bottle 3 before sampling starts. The piston 41 is at the bottom of the sampling bottle 3. At this time, there is no negative pressure in the sampling bottle 3, and the whole is in a ready state for waiting for sampling.

[0025] With the help of an external support device (such as a crane), slowly lower the entire sampler 1 into the water body through the suspension rope 15. During this process, the water depth sensor set on the sampler 1 monitors the lowered depth in real time. When the water depth sensor detects that the specified sampling depth has been reached, it will send an electrical signal to the electric cylinder 4 to inform that the appropriate position has been reached and the sampling operation is ready to start.

[0026] After receiving the signal from the water depth sensor, the electric cylinder 4 starts to work. Its output end drives the piston 41 to move upward in the sampling bottle 3. Since the piston 41 is in sealed sliding connection with the inner wall of the sampling bottle 3, as the piston 41 rises, the space in the sampling bottle 3 gradually increases, thus forming a negative pressure area in the sampling bottle 3. The suction force generated by this negative pressure area causes a pressure difference between the inside and outside of the water inlet 112 originally blocked by the baffle 113 on the mounting table 111. When the pressure difference reaches a certain level, it will overcome the blocking force of the baffle 113, causing the baffle 113 to open, and the external water sample can then enter the sampling bottle 3 through the water inlet 112, thereby realizing the suction sampling operation of the water sample.

[0027] Since there are three sampling bottles 3 and electric cylinders 4, which are distributed in a triangular shape, in the sampling operation of the same batch, each sampling bottle 3 can, under the control of its corresponding electric cylinder 4, perform the above-mentioned water sample collection operation according to different specified depths (the sampling depths of different sampling bottles 3 are determined by the cooperation of their respective connected water depth sensors and electric cylinders 4). In this way, the simultaneous collection of water samples at multiple layers can be achieved, effectively obtaining water samples at different depths, which is very helpful for analyzing the water quality differences at different depths in the water body (such as studying the pollutant distribution in different water layers of a lake or a reservoir).

[0028] When the sampling process is completed, the electric cylinder 4 stops working and the piston 41 no longer rises. Under the action of the gravity of the water body, at this time, the baffle 113 will move towards the water inlet 112 under the action of the gravity of the water body, thereby blocking the water inlet 112 again to prevent the water sample already collected in the sampling bottle 3 from flowing out. At the same time, it also avoids the entry of external water or impurities into the sampling bottle 3 during the subsequent removal of the sampler 1 from the water body and transportation, etc., ensuring the integrity and purity of the collected water sample.

[0029] If subsequent operations such as detecting the collected water sample are required, first, the water sample in the sampling bottle 3 needs to be drained. At this time, the plug cap 311 at the end of the drain pipe 31 can be removed, and then the drain pipe 31 can be taken off from the card seat 32, so that the water sample in the sampling bottle 3 can be smoothly guided through the drain pipe 31 to a specific adsorption membrane. These adsorption membranes are specially designed to efficiently adsorb the target pollutants in the water sample. For example, for some heavy metal ion pollutants, ion exchange adsorption membranes may be used, which have functional groups on their surfaces that can exchange with heavy metal ions. When the water sample flows through the adsorption membrane, the heavy metal ions will undergo exchange adsorption with the functional groups on the membrane and thus be fixed on the adsorption membrane. For organic pollutants, activated carbon adsorption membranes, etc. may be used. Activated carbon has a huge specific surface area and a rich microporous structure, and can adsorb organic pollutants on its surface and in the micropores through physical adsorption.

[0030] Through the adsorption effect, the target pollutants are adsorbed by the adsorption membrane and concentrated on the membrane. At the same time, since the adsorption process is mainly targeted at the target pollutants, most of the water in the water sample will not be adsorbed by the adsorption membrane in large quantities, but can continue to pass through the adsorption membrane or separate from the adsorption membrane under the action of gravity, etc. In this way, the effect of concentrating the target pollutants on the adsorption membrane while removing most of the water is achieved, thus greatly reducing the volume of the water sample. After the target pollutants are concentrated on the adsorption membrane and the volume of the water sample is significantly reduced, the adsorption membrane together with the pollutants adsorbed on it can be transferred to a designated container (such as a sample container for storing samples to be further analyzed) or directly placed into the corresponding detection equipment (such as an instrument for analyzing the content of specific pollutants) for subsequent more accurate detection and analysis operations.

[0031] This method of first draining the water sample to the adsorption membrane for concentration treatment not only facilitates the subsequent detection operations, but also improves the detection efficiency and accuracy, because through concentration, the target pollutants can be more concentratedly presented in a smaller sample volume, which is more conducive to the accurate analysis of the detection equipment.

[0032] The piston 41 is driven by the electric cylinder 4 to move upward in the sampling bottle 3 to form a negative pressure area. Then, the pressure difference between the negative pressure and the external water pressure is used to open the baffle 113 to achieve water sample suction and collection. This method can efficiently and stably collect the water sample into the sampling bottle 3. Since the sampling bottle 3 and the electric cylinder 4 are distributed in a triangular shape and can be operated at different specified depths respectively, the collection of water samples at multiple layers is realized, greatly improving the sampling efficiency. The water samples at different depths can be obtained at one time, which provides convenience for comprehensively understanding the vertical water quality distribution of the water body, and reduces the cumbersome operation and time cost of multiple separate samplings. In addition, after sampling, the sampled water flow can be guided to a specific adsorption membrane for concentration treatment. For different types of pollutants, targeted adsorption membranes can be selected, which can efficiently adsorb the target pollutants and achieve precise enrichment of the target pollutants in the water sample. Secondly, during the adsorption process, most of the water is removed, greatly reducing the volume of the water sample. This not only facilitates the subsequent transfer of the adsorption membrane and the pollutants adsorbed thereon to a specified container or detection device, but also makes the target pollutants more concentrated in a smaller sample volume through concentration, which is more conducive to the precise analysis of the detection device, thereby improving the detection efficiency and accuracy, saving the detection cost and time, and providing strong support for deeply and accurately understanding the pollutant situation in the water sample.

[0033] Example 2, refer to Figures 4 - 9 , the shunt filtration component includes a water baffle 5, a diversion hopper 51, a second filter cylinder 6 and a first filter cylinder 53. The water baffle 5 is fixedly connected to the bottom wall of the lower mounting plate 11. The water baffle 5 extends vertically downward along the outer edge line of the lower mounting plate 11. The structural feature that the water baffle 5 extends vertically downward enables it to directly face the oncoming surface transverse wave, thereby reducing the impact on the sampler 1 and the water sample collection process. The diversion hopper 51 is fixedly connected to the lower end of the water baffle 5. The diversion hopper 51 is recessed downward to the center of the bottom side of the lower mounting plate 11. The center of the diversion hopper 51 is fixedly connected with a first filter cylinder 53. The first filter cylinder 53 abuts against the bottom wall of the lower mounting plate 11. The lower end of the first filter cylinder 53 is fixedly connected with a conical cylinder 54. Filter slots 55 are formed through the first filter cylinder 53 and the conical cylinder 54. A plurality of groups of leakage slots 52 are annularly formed at the corners of the diversion hopper 51. The diversion hopper 51 further guides the direction of the water flow, concentrating the water flow and guiding it towards its central position, that is, flowing towards the first filter cylinder 53, so that the water flow can enter the filtration link orderly. On the other hand, the concave shape of the diversion hopper 51 helps to converge the water flow and improve the efficiency of the water flow entering the first filter cylinder 53, ensuring that the water sample can pass through the subsequent filtration device for filtration treatment more smoothly.

[0034] It should be noted that the water baffle 5 is made of rubber. Several mounting grooves 61 are provided at the bottom of the lower mounting plate 11. The first filter cartridge 53 is located at the center of the several mounting grooves 61. The mounting grooves 61 surround the corresponding water inlets 112. The upper end of the second filter cartridge 6 is provided with internal threads, and external threads meshing with the internal threads at the upper end of the second filter cartridge 6 are provided in the mounting grooves 61, which facilitates the disassembly and replacement of the second filter cartridge 6. This enables convenient and quick replacement in case of blockage, damage, etc. of the second filter cartridge 6 during long-term use, ensuring the continuous normal operation of the flow splitting and filtering assembly, and reducing the maintenance cost and difficulty.

[0035] The second filter cartridge 6 is located inside the space enclosed by the water baffle 5, the diversion hopper 51 and the lower mounting plate 11. As the sampler 1 moves downward, the water inside this space will enter through the first filter cartridge 53 and flow out through the leakage groove 52 to complete the automatic replacement of water samples at different layers. The pore size of the mesh of the second filter cartridge 6 is smaller than the pore size of the filter groove 55. As a further filtering component, after the water sample passes through the preliminary filtration of the first filter cartridge 53 and the conical cylinder 54, it will continue to pass through the second filter cartridge 6. Due to its smaller mesh pore size, it can filter out finer impurities still remaining in the water sample after preliminary filtration, such as some tiny sediment particles, plankton, etc., and perform more refined filtration on the water sample, further improving the purity of the water sample and ensuring that the water sample entering the sampling bottle 3 contains as few impurities as possible, so as to provide a more accurate and reliable water sample for subsequent water quality analysis and other operations.

[0036] In this embodiment, when the sampler 1 is lowered into the water body for water sample collection, the surface transverse wave will propagate towards the sampling device. Due to its structural characteristics of being fixedly connected to the bottom wall of the lower mounting plate 11 and extending vertically downward along the outer edge line, the water baffle 5 will directly face the incoming transverse wave. When the transverse wave impacts the water baffle 5, it will first produce a blocking effect. Just like a wall, the transverse wave cannot directly pass through the water baffle 5 to impact the sampling area of the sampler 1 and affect the overall position of the sampling device. This is based on the principle of the interaction of forces between objects. The impact force brought by the transverse wave acts on the water baffle 5, and the water baffle 5 resists this impact force with its own structural strength, thus protecting the components inside the sampling device and the overall stability.

[0037] Meanwhile, the water baffle 5 is not made of a completely rigid material. When it is impacted by shear waves, it will undergo a certain degree of elastic deformation (although this deformation may be relatively small). During this process, part of the energy of the shear wave will be absorbed by the water baffle 5 through its own elastic deformation and converted into other forms of energy such as the elastic potential energy of the water baffle 5. In addition, the surface of the water baffle 5 will also cause phenomena such as reflection and refraction of the shear wave, thereby dispersing the energy of the shear wave. After these processes, the energy of the shear wave passing through the water baffle 5 is weakened, reducing the impact on the sampler 1 and subsequent links in the water sample collection process (such as sampling depth control, stability of water sample entering the sampling device, etc.).

[0038] The first filter cartridge 53 and the conical cylinder 54 form a preliminary filtration structure. When the water flow is guided here by the diversion hopper 51, larger particulate impurities in the water will be blocked by the filter slot 55 and cannot enter subsequent components such as the sampling bottle 3 through the first filter cartridge 53 and the conical cylinder 54. The existence of the filter slot 55 enables preliminary screening and filtration of the water sample, removing larger particulate substances that may affect subsequent analysis and detection, such as sediment and larger floating objects, thereby preliminarily purifying the water sample and improving the quality of the water sample entering the sampling bottle 3.

[0039] As the sampler 1 moves downward, the water inside the space enclosed by the diversion hopper 51 will enter through the first filter cartridge 53. Since multiple groups of leakage slots 52 are annularly provided at the corners of the diversion hopper 51, after the water entering the inside of the diversion hopper 51 is filtered by the first filter cartridge 53, part of the water will continue to flow to subsequent components such as the second filter cartridge 6 for further filtration processing according to the normal filtration process, while another part of the water will flow out through the leakage slots 52. This is based on the principle of a communicating vessel of fluids. When there is a pressure difference in the water inside the diversion hopper 51, the water will flow from the place with higher pressure (near the first filter cartridge 53 inside the diversion hopper 51) to the place with lower pressure (at the leakage slots 52). The water flowing out through the leakage slots 52 will be replaced by the newly entered water inside the diversion hopper 51. As the sampler 1 continues to move downward, water samples at different depths will sequentially enter the space enclosed by the diversion hopper 51, completing a cycle process similar to "injection - outflow", realizing the automatic replacement of water samples at different layers. This enables continuous collection and filtration processing of water samples at different depths during a single sampling process without frequent manual intervention, improving the sampling efficiency. At the same time, it can also more comprehensively obtain information on water samples at different depths, contributing to the analysis of water quality changes in the vertical direction of the water body.

[0040] In particular, the diversion hopper 51 cooperates with components such as the water baffle 5 and the lower mounting plate 11, actually enclosing a relatively enclosed space. When water enters this space, it is equivalent to being restricted in this specific area for subsequent treatment. To a certain extent, this relatively enclosed area blocks the direct contact between the external environment and the sampled water sample, reducing the influence of external factors (such as wind waves, external water flow interference, impurity mixing, etc.) on the sampling process. On the other hand, during the process of the water sample entering the space enclosed by the diversion hopper 51 and then flowing out through the leakage trough 52, due to the shape of the space (such as the concave shape of the diversion hopper 51) and the layout of each component (such as the position of the first filter cartridge 53, etc.), the water flow will experience a series of guiding and distribution in this space. For example, the diversion hopper 51 converges and guides the water flow towards the first filter cartridge 53, and the water flow entering the space will flow more orderly under this guidance. When flowing out through the leakage trough 52, it is also shunted according to a certain rule. In this way, the sampling water flow can be more evenly distributed in this sampling space, avoiding situations such as too fast or too slow local water flow and water flow concentrating in certain areas, ensuring that the water samples collected at different depths can be treated relatively uniformly when entering and passing through this space, which is conducive to improving the accuracy and representativeness of sampling.

[0041] The second filter cartridge 6 is located inside the space enclosed by the water baffle 5, the diversion hopper 51 and the lower mounting plate 11, and the aperture of its mesh is smaller than that of the filter trough 55. When the water sample preliminarily filtered by the first filter cartridge 53 and the conical cylinder 54 continues to flow, it will reach the second filter cartridge 6.

[0042] According to the filtration principle, also because the aperture of the mesh of the second filter cartridge 6 is smaller, for the finer impurities still remaining in the water sample after preliminary filtration (such as some tiny sediment particles, plankton, etc.), whose sizes are larger than the aperture of the mesh of the second filter cartridge 6, these impurities will be blocked outside the second filter cartridge 6 and cannot pass through the second filter cartridge 6. Only water molecules and some smaller particle substances with sizes smaller than the aperture of the mesh of the second filter cartridge 6 can pass through the second filter cartridge 6, thereby filtering the water sample more finely, further improving the purity of the water sample, ensuring that the water sample entering the sampling bottle 3 contains as few impurities as possible, so as to provide a more accurate and reliable water sample for subsequent water quality analysis and other operations.

[0043] Through the above automatic replacement mechanism, continuous collection and filtration of water samples at different depths can be achieved without frequent manual intervention during a single sampling process. Compared with traditional methods such as sampling at each depth individually, replacing sampling equipment, or manually adjusting the sampling depth, the sampling efficiency is greatly improved. The operator only needs to lower the sampler 1 to an appropriate depth range, and the device can automatically complete the collection and filtration of water samples at different depths, saving a large amount of time and labor costs. Water samples at different depths may contain different concentrations of pollutants, different chemical compositions, and different physical properties (such as temperature, dissolved oxygen content, etc.). By continuously collecting and analyzing water samples at different depths, a water quality profile in the vertical direction of the water body can be drawn, enabling a more comprehensive and accurate understanding of the water quality conditions at different depths of the water body, providing important data support for fields such as water resource management, environmental protection, and water ecosystem research. By injecting the water body in the sampling area into a relatively enclosed interval, the influence of the external environment on sampling is effectively avoided. External environmental factors often interfere with the accuracy of sampling. For example, wind and waves may cause the sampling position to shift, external water currents may mix in irrelevant water samples, and impurities may enter the sampling equipment to contaminate the water samples. By forming a relatively enclosed sampling space, these problems can be greatly alleviated, ensuring that the collected water samples can truly reflect the real water quality of the corresponding depth of the water body, improving the quality and reliability of water sample collection. At the same time, the sampling water flow can also be more evenly distributed within this sampling space, avoiding situations such as local water flow being too fast or too slow, or water flow concentrating in certain areas, ensuring that water samples collected at different depths can be treated relatively uniformly when entering and passing through this space, which is conducive to improving the accuracy and representativeness of sampling.

[0044] Embodiment 3. Refer to Figures 5 - 9 , the cleaning component includes a limiting shaft 7 and an elastic magnetic plate 82. The limiting shaft 7 is rotatably clamped to the bottom of the lower mounting plate 11. The lower end of the limiting shaft 7 penetrates through the side wall of the second filter cylinder 6. A fan blade 71 is fixedly connected to the limiting shaft 7 located inside the second filter cylinder 6. The elastic magnetic plate 82 is fixedly connected to the bottom wall of the lower mounting plate 11. The elastic magnetic plate 82 surrounds the outside of the first filter cylinder 53. A bracket 8 is fixedly installed at the end of the limiting shaft 7 located outside the second filter cylinder 6. A soft brush is fixedly connected to one side of the bracket 8 facing the second filter cylinder 6. A magnetic block 81 is fixedly installed on the vertical side wall of the bracket 8. Through the above settings, when the sampler 1 draws water, the water flow will first pass through the fan blade 71 and then enter the sampling bottle 3 through the water inlet 112. At this time, the water flow will drive the fan blade 71 and the limiting shaft 7 to rotate. Correspondingly, the bracket 8 will also rotate accordingly. At this time, the soft brush can clean the second filter cylinder 6.

[0045] It should be noted that the blades of the fan blade 71 are made of inclined light materials, ensuring that the water flow can effectively drive the rotation of the fan blade 71. The cross-section of the bracket 8 is L-shaped. The end of the soft brush abuts against the side wall of the second filter cartridge 6, ensuring effective dredging and cleaning of the second filter cartridge 6. In the initial state, the lower end of the elastic magnetic plate 82 abuts against the side wall of the first filter cartridge 53. The opposite surfaces of the magnetic block 81 and the elastic magnetic plate 82 are set with different polar magnetisms. There is a gap between the bracket 8 and the elastic magnetic plate 82 when the bracket 8 rotates around the second filter cartridge 6. As the bracket 8 continues to rotate, the magnetic block 81 will gradually approach the elastic magnetic plate 82. At this time, the magnetic force between the two will gradually increase. Under the action of the magnetic attraction force, the elastic magnetic plate 82 will approach the magnetic block 81. As the bracket 8 continues to rotate, the magnetic force between the two weakens, and the elastic magnetic plate 82 will reset. The reset elastic magnetic plate 82 will act on the side wall of the first filter cartridge 53. On the one hand, it can strike and dredge the first filter cartridge 53. On the other hand, it can make a sound to keep fish and shrimp away from the sampler 1 and avoid interfering with the sampling result.

[0046] In this embodiment, when the sampler 1 takes water, the water flow will first pass through the fan blade 71 and then enter the sampling bottle 3 through the water inlet 112. Since the blades of the fan blade 71 are made of inclined light materials, when the water flow passes through the fan blade 71, a lateral force will be generated on the inclined blades of the fan blade 71. According to the effect of the force, this lateral force will cause the fan blade 71 to rotate. The rotation of the fan blade 71 drives the limit shaft 7 to rotate synchronously, and the limit shaft 7 further drives the connected bracket 8 to rotate accordingly.

[0047] As the bracket 8 rotates, the soft brush fixed on one side of the bracket 8 and abutting against the side wall of the second filter cartridge 6 will also rotate. During the rotation of the soft brush, it will continuously clean the side wall of the second filter cartridge 6, brushing off the impurities attached to the side wall, effectively preventing the second filter cartridge 6 from being blocked due to impurity attachment, and ensuring the filtration efficiency of the second filter cartridge 6 and the smoothness of the water sample passing through.

[0048] During the rotation of the support 8, the magnetic block 81 installed on the vertical side wall of the support 8 will also rotate accordingly. In the initial state, there is a gap between the magnetic block 81 and the elastic magnetic plate 82. As the support 8 continues to rotate, the magnetic block 81 will gradually approach the elastic magnetic plate 82. Since the opposite faces of the magnetic block 81 and the elastic magnetic plate 82 are set with different polar magnetisms, when the magnetic block 81 approaches the elastic magnetic plate 82, the magnetic force between the two gradually increases. Under the action of the magnetic force, the elastic magnetic plate 82 will approach the magnetic block 81. When the support 8 continues to rotate, the relative positions of the magnetic block 81 and the elastic magnetic plate 82 change, and the magnetic force between the two weakens, and the elastic magnetic plate 82 will reset. The reset elastic magnetic plate 82 will act on the side wall of the first filter cartridge 53. Through this periodic approaching and resetting action, the side wall of the first filter cartridge 53 is knocked, so as to shake off the impurities that may be blocked in the first filter cartridge 53, playing a role in dredging the first filter cartridge 53. At the same time, the collision between the elastic magnetic plate 82 and the side wall of the first filter cartridge 53 and its own vibration will make sounds. In the water environment, these sounds will spread, causing the surrounding fish and shrimp to be frightened and thus stay away from the sampler 1, avoiding the interference with the sampling results that may be caused by the fish and shrimp approaching the sampler 1. For example, the swimming of fish and shrimp may drive the water flow and disrupt the water sample components, or the fish and shrimp enter the sampling device and block the pipeline, etc.

[0049] Through the cleaning of the second filter cartridge 6 by the soft brush and the dredging of the first filter cartridge 53 by the elastic magnetic plate 82, it can effectively prevent the first filter cartridge 53 and the second filter cartridge 6 from being blocked by impurities and affecting the filtering effect, ensuring that the water sample can pass smoothly when passing through these two filter cartridges, maintaining the normal filtering function of the shunt filtering component, so as to ensure that the collected water sample can be fully filtered, improving the purity of the water sample, and providing a more accurate and reliable water sample for subsequent water quality analysis and other operations. In addition, using the sound emitted by the elastic magnetic plate 82 to drive away aquatic organisms such as fish and shrimp avoids the interference of these organisms on the sampling process, further ensuring the accuracy and reliability of the sampling results.

[0050] It should be noted that the specific model specifications of the electric cylinder 4 and the water depth sensor need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0051] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A portable water sample collection device, comprising a sampler (1) and a placement box (2), the placement box (2) being composed of a box body (21) and a box cover (22), a placement cavity (20) for placing the sampler (1) being arranged inside the box body (21), a water depth sensor being arranged on the sampler (1), characterized in that, Further included are: A multi-layer sampling component: The multi-layer sampling component is arranged on the sampler (1), and the multi-layer sampling component can collect water samples of multiple layers in the same batch; A shunt filtering component: The shunt filtering component is arranged at the lower end of the multi-layer sampling component. The shunt filtering component can protect the sampler (1) during sampling and can also perform multi-layer filtering on the water sample; A cleaning component: The cleaning component is arranged inside the shunt filtering component. The cleaning component can clean the shunt filtering component during sampling and can also prevent interference from fish and shrimp in the water during sampling.

2. The portable water sample collection device according to claim 1, wherein, The multi-layer sampling component includes a lower mounting plate (11), an upper mounting plate (12), a connecting plate (13), a sampling bottle (3) and an electric cylinder (4). The sampling bottle (3) is installed between the lower mounting plate (11) and the upper mounting plate (12). The electric cylinder (4) is fixedly installed on the upper mounting plate (12). The output end of the electric cylinder (4) penetrates through the side wall of the upper mounting plate (12) and extends into the sampling bottle (3). The output end of the electric cylinder (4) located inside the sampling bottle (3) is fixedly connected with a piston (41). The piston (41) is hermetically and slidably connected with the inner wall of the sampling bottle (3). The side wall of the electric cylinder (4) away from the upper mounting plate (12) is fixedly connected with the bottom wall of the connecting plate (13). The top of the connecting plate (13) is fixedly connected with a connecting seat (14). A suspension rope (15) is sleeved on the connecting seat (14), and the end of the suspension rope (15) is connected to an external support device.

3. The portable water sample collection device according to claim 2, wherein, An installation platform (111) is fixedly connected to the lower mounting plate (11) inside the sampling bottle (3). A water inlet (112) is opened on the installation platform (111). The end of the water inlet (112) penetrates through the side walls of the installation platform (111) and the lower mounting plate (11). A baffle (113) for blocking the water inlet (112) is installed on the installation platform (111). A drain pipe (31) is connected to the side wall of the sampling bottle (3) close to the installation platform (111). A clamping seat (32) is fixedly connected to the side wall of the sampling bottle (3). The upper end of the drain pipe (31) is clamped on the clamping seat (32), and a plug cap (311) is inserted and installed at the end of the drain pipe (31).

4. The portable water sample collection device according to claim 3, characterized in that, There are three sampling bottles (3) and electric cylinders (4), which are distributed in a triangular shape. The water depth sensor is electrically connected to the electric cylinder (4). In the initial state, the baffle (113) completely blocks the water inlet (112), and the piston (41) is at the bottom of the sampling bottle (3). When the piston (41) rises, a negative pressure area is formed in the sampling bottle (3) to open the baffle (113) and complete the suction sampling operation through the water inlet (112). After sampling, under the action of the gravity of the water body, the baffle (113) blocks the water inlet (112) again.

5. The portable water sample collection device according to claim 2, wherein The shunt filtration assembly includes a water baffle (5), a diversion hopper (51), a second filter cartridge (6), and a first filter cartridge (53). The water baffle (5) is fixedly connected to the bottom wall of the lower mounting plate (11). The water baffle (5) extends vertically downward along the outer edge line of the lower mounting plate (11). The diversion hopper (51) is fixedly connected to the lower end of the water baffle (5). The diversion hopper (51) is recessed downward toward the center of the bottom side of the lower mounting plate (11). A first filter cartridge (53) is fixedly connected to the center of the diversion hopper (51). The first filter cartridge (53) abuts against the bottom wall of the lower mounting plate (11). A conical cylinder (54) is fixedly connected to the lower end of the first filter cartridge (53). Filter slots (55) are formed through the first filter cartridge (53) and the conical cylinder (54). A plurality of leakage slots (52) are annularly formed at the corners of the diversion hopper (51).

6. The portable water sample collection device according to claim 5, wherein, The water baffle (5) is made of rubber. A plurality of mounting slots (61) are provided at the bottom of the lower mounting plate (11). The first filter cartridge (53) is located at the center of the plurality of mounting slots (61). The mounting slots (61) surround the outside of the corresponding water inlet (112). The upper end of the second filter cartridge (6) is provided with internal threads. External threads meshing with the internal threads at the upper end of the second filter cartridge (6) are provided in the mounting slots (61). The second filter cartridge (6) is located inside the space surrounded by the water baffle (5), the diversion hopper (51), and the lower mounting plate (11). The pore diameter of the mesh holes of the second filter cartridge (6) is smaller than the pore diameter of the filter slots (55).

7. A portable water sample collection device according to claim 5, characterized in that, The cleaning assembly includes a limiting shaft (7) and an elastic magnetic plate (82). The limiting shaft (7) is rotatably clamped to the bottom of the lower mounting plate (11). The lower end of the limiting shaft (7) penetrates through the side wall of the second filter cartridge (6). A fan blade (71) is fixedly connected to the limiting shaft (7) inside the second filter cartridge (6). The elastic magnetic plate (82) is fixedly connected to the bottom wall of the lower mounting plate (11). The elastic magnetic plate (82) surrounds the outside of the first filter cartridge (53). A bracket (8) is fixedly installed at the end of the limiting shaft (7) outside the second filter cartridge (6). A soft brush is fixedly connected to one side of the bracket (8) facing the second filter cartridge (6). A magnetic block (81) is fixedly installed on the vertical side wall of the bracket (8).

8. A portable water sample collection device according to claim 7, wherein, The blades of the fan blade (71) are made of inclined light materials. The cross section of the bracket (8) is L-shaped. The end of the soft brush abuts against the side wall of the second filter cartridge (6). The lower end of the elastic magnetic plate (82) in the initial state abuts against the side wall of the first filter cartridge (53). The opposite surfaces of the magnetic block (81) and the elastic magnetic plate (82) are magnetized with different polarities. There is a gap between the bracket (8) and the elastic magnetic plate (82) when the bracket (8) rotates around the second filter cartridge (6).

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