Water environment sampling device

Abstract

The invention provides a water environment sampling device, and relates to the technical field of environment detection, and the water environment sampling device comprises a multi-stage filtering assembly, a blockage monitoring module and a cleaning assembly which are arranged in a sampling shell; the multi-stage filter assembly comprises a first filter screen, a second filter screen and a third filter screen, the apertures of the first filter screen, the second filter screen and the third filter screen are sequentially reduced, and the first filter screen, the second filter screen and the third filter screen are arranged close to the water inlet of the sampling shell and are arranged at intervals in the water flow direction; the blockage monitoring module is used for determining the real-time water pressure difference between the two sides of the third filter screen and sending a real-time cleaning instruction to the cleaning assembly according to the real-time water pressure difference; and the cleaning assembly is used for controlling a spiral scraper arranged on the surface of the third filter screen to operate according to the real-time cleaning instruction. The water environment sampling device can be automatically cleaned, and the sampling efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of environmental monitoring technology, and more specifically, to a water environment sampling device. Background Technology

[0002] Water environment monitoring focuses on the aquatic environment and utilizes physical, chemical, and biological techniques to conduct qualitative, quantitative, and systematic comprehensive analysis of pollutants and their related components in order to explore and study the patterns of change in water quality. The first step in water environment monitoring is water sampling to obtain representative samples that accurately reflect the water quality status, providing irreplaceable scientific support for subsequent analysis.

[0003] In related technologies, when water environment sampling devices are used in areas with complex water environments, such as high-turbidity water bodies, foreign objects in the water can easily clog the filter screen of the water environment sampling device, requiring manual cleaning and resulting in low sampling efficiency. Summary of the Invention

[0004] The problem addressed by this invention is how to improve sampling efficiency.

[0005] To address the above problems, the present invention provides a water environment sampling device, comprising a multi-stage filtration assembly, a clogging monitoring module, and a cleaning assembly disposed inside the sampling housing; The multi-stage filtration assembly includes a first filter screen, a second filter screen, and a third filter screen with successively decreasing pore sizes. The first filter screen, the second filter screen, and the third filter screen are located near the water inlet of the sampling housing and are arranged at intervals along the water flow direction. The blockage monitoring module is used to determine the real-time water pressure difference on both sides of the third filter screen, and send a real-time cleaning command to the cleaning component based on the real-time water pressure difference. The cleaning component is used to control the operation of the spiral scraper set on the surface of the third filter screen according to the real-time cleaning command.

[0006] Optionally, the blockage monitoring module includes a control unit, a transmission unit, and multiple pressure sensors, which are evenly arranged on both sides of the third filter screen to collect the pressure on both sides of the third filter screen in real time. The control unit is used to determine the real-time water pressure difference based on the pressure on both sides of the third filter screen, and to generate the real-time cleaning command based on the real-time water pressure difference and the cleaning strategy. The transmission unit is used to transmit the real-time cleaning command to the cleaning component.

[0007] Optionally, the cleaning strategy includes: When the real-time water pressure difference is greater than the cleaning threshold, the cleaning component is activated, and when the real-time water pressure difference decreases to the stop threshold, the cleaning component is deactivated after a preset time. When the real-time water pressure difference is less than the stop threshold, the cleaning component is turned off after a preset time.

[0008] Optionally, the water environment sampling device further includes a cloud module, and the blockage monitoring module is further used to obtain the cleaning time and cleaning frequency of the cleaning component, and send the cleaning time, the cleaning frequency and the corresponding real-time water pressure difference to the cloud module. The cloud module is used to update the cleaning threshold according to the cleaning time, the cleaning frequency and the corresponding real-time water pressure difference.

[0009] Optionally, the first filter, the second filter, and the third filter are all equipped with RFID tags, and the RFID tags store the corresponding usage time of the filter. The cloud module is also used to determine the usage time of the first filter, the second filter, and the third filter based on the RFID tags, and generate cleaning suggestions based on the usage time.

[0010] Optionally, at least one of the first filter, the second filter, and the third filter is installed into the sampling housing by a magnetic snap-fit.

[0011] Optionally, the cleaning assembly further includes a stepper motor and a planetary gearbox, wherein the stepper motor, the planetary gearbox, and the spiral scraper are sequentially driven and connected.

[0012] Optionally, the blockage monitoring module further includes a flow meter for obtaining the water flow rate inside the sampling housing.

[0013] Optionally, the surface of the spiral scraper that abuts against the third filter screen is provided with a silicon carbide wear-resistant coating.

[0014] Optionally, the diameter of the internal flow channel of the sampling housing decreases sequentially from the inlet to the outlet.

[0015] The beneficial effects of the water environment sampling device of the present invention are: The multi-stage filtration system, consisting of a first, second, and third filter screen arranged at intervals along the water flow direction with progressively smaller pore sizes, intercepts impurities of different particle sizes step by step. This avoids a single filter screen bearing the entire filtration load, reducing the risk of clogging at the source and laying the foundation for stable sampling. Furthermore, a clogging monitoring module determines the clogging status by monitoring the water pressure difference across the third filter screen and sends real-time cleaning commands. This allows for real-time detection of the filter screen's clogging level, replacing traditional timed or manual cleaning methods and ensuring that cleaning is only initiated when necessary, reducing unnecessary energy consumption. The cleaning component controls the spiral scraper on the surface of the third filter screen based on the real-time cleaning commands, specifically removing deposits and ensuring filter permeability. The synergistic effect of these three components not only improves impurity interception efficiency through multi-stage filtration but also prevents sampling interruptions caused by filter clogging through precise monitoring and targeted cleaning, ultimately improving sampling continuity and efficiency, and extending filter lifespan. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the water environment sampling device provided in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Sampling housing; 11. Inlet; 12. Outlet; 13. Release button; 2. Multi-stage filtration assembly; 21. First filter screen; 22. Second filter screen; 23. Third filter screen; 3. Clogging monitoring module; 31. Pressure sensor; 4. Cleaning assembly; 41. Spiral scraper; 42. Stepper motor; 43. Planetary gearbox. Detailed Implementation

[0018] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0019] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0020] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0021] like Figure 1 As shown, an embodiment of the present invention provides a water environment sampling device, including a multi-stage filtration assembly 2, a blockage monitoring module 3, and a cleaning assembly 4 disposed inside a sampling housing 1; The multi-stage filtration assembly 2 includes a first filter screen 21, a second filter screen 22, and a third filter screen 23 with successively decreasing pore sizes. The first filter screen 21, the second filter screen 22, and the third filter screen 23 are arranged near the water inlet 11 of the sampling housing 1 and are spaced apart along the water flow direction.

[0022] Specifically, the pore sizes of the first filter screen 21, the second filter screen 22, and the third filter screen 23 decrease sequentially. That is, the first filter screen 21 has the largest pore size, for example, 1 mm, which can intercept large particles such as leaves and twigs; the second filter screen 22 has the next largest pore size, for example, 0.5 mm, which can intercept medium-sized particles such as mud and algae; and the third filter screen 23 has the smallest pore size, for example, 0.1 mm, which can intercept fine impurities such as microorganisms and colloids. The first filter screen 21, the second filter screen 22, and the third filter screen 23 are positioned close to the water inlet 11 of the sampling housing 1 and are arranged at intervals along the water flow direction. That is, the first filter screen 21 is closest to the water inlet 11, the second filter screen 22 is next, and the third filter screen 23 is furthest from the water inlet 11. Water enters through the water inlet 11, passes through the first filter screen 21, the second filter screen 22, and the third filter screen 23 in sequence, and then flows out from the water outlet 12. The water flowing out of the water outlet 12 is collected as a sample.

[0023] The blockage monitoring module 3 is used to determine the real-time water pressure difference on both sides of the third filter screen 23, and send a real-time cleaning command to the cleaning component 4 based on the real-time water pressure difference.

[0024] Specifically, under normal flow conditions, when water flows through the filter screen, natural resistance is generated due to the limitation of the filter screen's pore size. At this time, the water pressure difference across the filter screen is small, generally less than 5 kPa. However, under clogging conditions, as impurities accumulate on the filter screen, the pores become blocked, the water flow channel narrows, and the resistance increases significantly. The pressure at the filter screen inlet increases due to the obstructed water flow, while the pressure at the filter screen outlet decreases due to the reduced flow rate. Therefore, the water pressure difference across the filter screen increases. When the water pressure difference exceeds 5 kPa, it indicates that the degree of filter screen clogging has affected normal sampling and cleaning is required. A real-time cleaning command is sent to the cleaning component 4, which then performs cleaning. The clogging monitoring module 3 can be set with a monitoring period to periodically determine the water pressure difference.

[0025] The cleaning component 4 is used to control the operation of the spiral scraper 41 set on the surface of the third filter screen 23 according to the real-time cleaning command.

[0026] Specifically, the cleaning component 4 controls the operation of the spiral scraper 41 installed on the surface of the third filter screen 23 according to real-time cleaning instructions, so as to automatically scrape off the impurities attached to the third filter screen 23, thereby ensuring smooth water flow. In addition, during sampling, the pressure difference generated after the water flows through the first filter screen 21 and the second filter screen 22 will indirectly cause some impurities attached to the first filter screen 21 and the second filter screen 22 to fall off, such as large particles of silt falling off on their own under the impact of water flow. Therefore, only the spiral scraper 41 installed on the surface of the third filter screen 23 is controlled to operate, so as to automatically scrape off the impurities attached to the third filter screen 23.

[0027] In this embodiment, the multi-stage filtration assembly 2, consisting of a first filter screen 21, a second filter screen 22, and a third filter screen 23 arranged at intervals along the water flow direction with progressively decreasing pore sizes, can intercept impurities of different particle sizes step by step. This avoids a single filter screen bearing the entire filtration load, reducing the risk of clogging at the source and laying the foundation for stable sampling. Furthermore, the clogging monitoring module 3 determines the clogging status by monitoring the water pressure difference across the third filter screen 23 and sends real-time cleaning commands. This allows for real-time capture of the filter screen clogging level, replacing traditional timed or manually triggered cleaning methods, ensuring that cleaning is only initiated when necessary, reducing unnecessary energy consumption. The cleaning assembly 4 controls the spiral scraper 41 on the surface of the third filter screen 23 according to the real-time cleaning commands, specifically removing deposits from the filter screen surface and ensuring filter permeability. The synergistic effect of these three components not only improves impurity interception efficiency through graded filtration but also avoids sampling interruptions caused by filter screen clogging through precise monitoring and targeted cleaning, ultimately improving sampling continuity and efficiency, and extending filter screen lifespan.

[0028] Optionally, such as Figure 1As shown, the blockage monitoring module 3 includes a control unit, a transmission unit, and multiple pressure sensors 31. The multiple pressure sensors 31 are evenly arranged on both sides of the third filter screen 23 to collect the pressure on both sides of the third filter screen 23 in real time. The control unit is used to determine the real-time water pressure difference based on the pressure on both sides of the third filter screen 23, and to generate the real-time cleaning command based on the real-time water pressure difference and the cleaning strategy. The transmission unit is used to transmit the real-time cleaning command to the cleaning component 4.

[0029] Specifically, the blockage monitoring module 3 includes a control unit, a transmission unit, and multiple pressure sensors 31. These pressure sensors 31 are evenly distributed on both sides of the third filter screen 23 to collect the pressure on both sides of the third filter screen 23 in real time. The pressure sensors 31 can be microelectromechanical systems (MEMS) piezoresistive sensors (accuracy ±0.1 kPa). When multiple pressure sensors 31 are located on one side of the third filter screen 23, the average pressure value detected by the multiple sensors 31 can be taken. The control unit is used to determine the real-time water pressure difference based on the pressure on both sides of the third filter screen 23 (i.e., by subtracting the pressure on both sides and taking the absolute value). Based on the real-time water pressure difference and the cleaning strategy, it generates real-time cleaning instructions. The control unit can use an ESP32 chip. The transmission unit is used to transmit the real-time cleaning instructions to the cleaning component 4. The transmission unit can transmit wirelessly via a LoRa module. The blockage monitoring module 3 also includes an analog-to-digital converter (ADC) to convert the analog signals output by the sensors into digital signals, providing a standardized data format for subsequent chip processing.

[0030] For example, such as Figure 1 As shown, pressure sensors 31 can also be installed on both sides of the first filter screen 21 and the second filter screen 22 to determine the real-time water pressure difference between the two sides of the first filter screen 21 and the second filter screen 22. The control unit generates a corresponding cleaning reminder and sends the cleaning reminder to the mobile terminal APP through the transmission unit.

[0031] Optionally, the cleaning strategy includes: When the real-time water pressure difference is greater than the cleaning threshold, the cleaning component 4 is activated, and when the real-time water pressure difference decreases to the stop threshold, the cleaning component 4 is deactivated after a preset time. When the real-time water pressure difference is less than the stop threshold, the cleaning component 4 is turned off after a preset time.

[0032] Specifically, the cleaning threshold and stop threshold can be set according to actual conditions. For example, the cleaning threshold can be set to 5 kPa and the stop threshold to 3 kPa. When the real-time water pressure difference is greater than the cleaning threshold, the cleaning component 4 is started; when the real-time water pressure difference is less than or equal to the cleaning threshold, the current working state is maintained. That is, if the cleaning component 4 is cleaning, it continues to clean; if the cleaning component 4 is not working, it does not work. When the real-time water pressure difference is less than the stop threshold, the cleaning component 4 is turned off after a preset time to ensure the cleaning effect. The preset time can be set according to actual conditions, such as 0 seconds, 1 minute, 5 minutes, etc.

[0033] Optionally, the water environment sampling device further includes a cloud module, and the blockage monitoring module 3 is further used to obtain the cleaning time and cleaning frequency of the cleaning component 4, and send the cleaning time, the cleaning frequency and the corresponding real-time water pressure difference to the cloud module. The cloud module is used to update the cleaning threshold according to the cleaning time, the cleaning frequency and the corresponding real-time water pressure difference.

[0034] Specifically, the water environment sampling device also includes a cloud module. The blockage monitoring module 3 is also used to obtain the cleaning time and cleaning frequency of the cleaning component 4, and send the cleaning time, cleaning frequency and corresponding real-time water pressure difference to the cloud module. The cloud module is used to dynamically update the cleaning threshold based on the water environment, cleaning time, cleaning frequency and corresponding real-time water pressure difference uploaded by the user. For example, in a high turbidity water environment, the probability of blockage increases, and the cleaning time and cleaning frequency also increase. Therefore, the cleaning threshold is dynamically reduced to 4 kPa to start cleaning in advance, so as to reduce the blockage and increase the sampling efficiency.

[0035] Optionally, the first filter 21, the second filter 22, and the third filter 23 are all equipped with RFID tags. The RFID tags store the usage time of the corresponding filter. The cloud module is also used to determine the usage time of the first filter 21, the second filter 22, and the third filter 23 according to the RFID tags, and generate cleaning suggestions based on the usage time.

[0036] Specifically, RFID tags are embedded on the edges of the first filter 21, the second filter 22, and the third filter 23. The RFID tags can be active RFID tags. The RFID tags record the corresponding filter model, usage time, and replacement records. When the usage time of the filter exceeds the preset usage time threshold, the cloud module generates a cleaning suggestion and links with the mobile terminal APP to push the cleaning suggestion in real time. Alternatively, when the cloud module analyzes and judges that there is a risk of blockage based on multiple pressure sensors 31, the cloud module links with the mobile terminal APP to push the cleaning suggestion in real time.

[0037] For example, cleaning can be completed by closing the inlet 11, opening the drain valve of the sampling housing 1, and using a high-pressure water pump to backwash the first filter screen 21, the second filter screen 22, or the third filter screen 23.

[0038] Optionally, at least one of the first filter 21, the second filter 22, and the third filter 23 is installed into the sampling housing 1 by a magnetic snap-fit.

[0039] Specifically, at least one of the first filter screen 21, the second filter screen 22, and the third filter screen 23 is installed to the sampling housing 1 by a magnetic snap-fit, and, as Figure 1 As shown, the magnetic buckle can be engaged and disengaged by the release button 13 on the magnetic buckle to achieve quick disassembly, which facilitates manual rinsing or replacement of each filter screen.

[0040] Optionally, such as Figure 1 As shown, the cleaning component 4 also includes a stepper motor 42 and a planetary gearbox 43, which are sequentially driven and connected to each other.

[0041] Specifically, at the start of cleaning, the stepper motor 42 is started, and the power of the stepper motor 42 is transmitted to the planetary gearbox 43. After being decelerated by the gearbox, the spiral scraper 41 is driven to rotate at a set speed (adjustable from 10 to 50 rpm). The speed is proportional to the real-time water pressure difference. The greater the real-time water pressure difference, the more serious the blockage, and the higher the speed.

[0042] Optionally, the blockage monitoring module 3 further includes a flow meter, which is used to obtain the water flow rate inside the sampling housing 1.

[0043] Specifically, the blockage monitoring module 3 also includes multiple flow meters, which are located on both sides of the first filter screen 21, the second filter screen 22, and the third filter screen 23, respectively. The flow meters are used to acquire the water flow rate at various locations inside the sampling housing 1 and send the water flow rate to the cloud module. The water flow rate helps determine the impact of changes in water flow rate on the pressure difference, thus facilitating further data analysis. The transmission unit is also used to package and send cleaning time, cleaning frequency, corresponding real-time water pressure difference, and water flow rate to the cloud module to achieve remote monitoring and historical data storage, and to support trend analysis and maintenance prediction based on pressure difference.

[0044] Optionally, the surface of the spiral scraper 41 that abuts against the third filter screen 23 is provided with a silicon carbide wear-resistant coating.

[0045] Specifically, the surface of the spiral scraper 41 that abuts against the third filter screen 23 is provided with a silicon carbide wear-resistant coating to improve scraping efficiency, and the spiral scraper 41 is attached to the surface of the third filter screen 23 at a 30° tilt angle to further improve scraping efficiency.

[0046] Optionally, the diameter of the internal flow channel of the sampling housing 1 decreases sequentially from the inlet 11 to the outlet 12.

[0047] Specifically, the sampling housing 1 is made of polylactic acid (PLA) biodegradable material, which reduces operation and maintenance costs and environmental burden. The diameter of the internal flow channel gradually decreases from the inlet 11 to the outlet 12, that is, the internal flow channel is designed as a tapered structure, which can reduce turbulence and improve sampling effect.

[0048] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A water environment sampling device, characterized in that, It includes a multi-stage filtration assembly (2), a clogging monitoring module (3), and a cleaning assembly (4) installed inside the sampling housing (1); The multi-stage filtration assembly (2) includes a first filter screen (21), a second filter screen (22), and a third filter screen (23) with successively decreasing pore sizes. The first filter screen (21), the second filter screen (22), and the third filter screen (23) are arranged close to the water inlet (11) of the sampling housing (1) and are spaced apart along the water flow direction. The blockage monitoring module (3) is used to determine the real-time water pressure difference on both sides of the third filter screen (23) and send a real-time cleaning command to the cleaning component (4) based on the real-time water pressure difference. The cleaning component (4) is used to control the operation of the spiral scraper (41) set on the surface of the third filter (23) according to the real-time cleaning command.

2. The water environment sampling device according to claim 1, characterized in that, The blockage monitoring module (3) includes a control unit, a transmission unit and multiple pressure sensors (31). The multiple pressure sensors (31) are evenly arranged on both sides of the third filter screen (23) to collect the pressure on both sides of the third filter screen (23) in real time. The control unit is used to determine the real-time water pressure difference based on the pressure on both sides of the third filter (23), and to generate the real-time cleaning instruction based on the real-time water pressure difference and the cleaning strategy; The transmission unit is used to transmit the real-time cleaning command to the cleaning component (4).

3. The water environment sampling device according to claim 2, characterized in that, The cleaning strategy includes: When the real-time water pressure difference is greater than the cleaning threshold, the cleaning component (4) is started, and when the real-time water pressure difference drops to the stop threshold, the cleaning component (4) is turned off after waiting for a preset time. When the real-time water pressure difference is less than or equal to the cleaning threshold, the current working state is maintained.

4. The water environment sampling device according to claim 3, characterized in that, It also includes a cloud module. The blockage monitoring module (3) is also used to obtain the cleaning time and cleaning frequency of the cleaning component (4) and send the cleaning time, the cleaning frequency and the corresponding real-time water pressure difference to the cloud module. The cloud module is used to update the cleaning threshold according to the cleaning time, the cleaning frequency and the corresponding real-time water pressure difference.

5. The water environment sampling device according to claim 4, characterized in that, The first filter (21), the second filter (22) and the third filter (23) are all equipped with RFID tags. The RFID tags store the usage time of the corresponding filter. The cloud module is also used to determine the usage time of the first filter (21), the second filter (22) and the third filter (23) according to the RFID tags, and generate cleaning suggestions according to the usage time.

6. The water environment sampling device according to claim 1, characterized in that, At least one of the first filter (21), the second filter (22) and the third filter (23) is installed into the sampling housing (1) by magnetic snap-fit.

7. The water environment sampling device according to claim 1, characterized in that, The cleaning assembly (4) also includes a stepper motor (42) and a planetary gearbox (43), which are sequentially driven and connected to each other.

8. The water environment sampling device according to claim 1, characterized in that, The blockage monitoring module (3) also includes a flow meter, which is used to obtain the water flow rate inside the sampling housing (1).

9. The water environment sampling device according to claim 1, characterized in that, The surface of the spiral scraper (41) that abuts against the third filter screen (23) is provided with a silicon carbide wear-resistant coating.

10. The water environment sampling device according to claim 1, characterized in that, The diameter of the internal flow channel of the sampling housing (1) decreases sequentially from the inlet (11) to the outlet (12).

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