A device for detecting particulate matter in backwash water of a water plant filter

Abstract

This invention proposes a particle detection device for backwash water in water plant filters, relating to the field of water particle size detection technology. It includes a particle size analyzer body and a transparent detection tube. Two connecting pipes are installed on the particle size analyzer body, and both ends of the transparent detection tube are connected to the two connecting pipes respectively. Two sealing installation mechanisms are provided on the transparent detection tube to fix and seal both ends of the transparent detection tube to the two connecting pipes respectively. This invention provides a particle detection device for backwash water in water plant filters. Through the particle size analyzer body, transparent detection tube, connecting pipes, sealing installation mechanisms, detection module, and cleaning mechanism, it can automatically and periodically clean the inner wall of the detection section of the transparent detection tube, ensuring the accuracy of water particle size detection results. Furthermore, the cleaning mechanism can perform self-cleaning, ensuring multiple cleanings of the inner wall of the detection section, guaranteeing the cleaning effect each time, and reducing the need for disassembly and cleaning.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, and in particular to a device for detecting particulate matter in backwash water of a water plant filter. Background Technology

[0002] In water treatment processes at waterworks, filters are the core unit for removing suspended solids, colloids, and other impurities from water, and backwashing is a crucial step in restoring the filtration capacity of the filters during operation. The particle composition of the backwash water directly reflects the wear and loss of the filter media and the rationality of the backwashing process. If the particle content (filter media debris, silt, microbial flocs, etc.) in the backwash water exceeds the standard, it will not only waste filter media resources and shorten the filter's operating cycle, but may also cause blockages in subsequent process pipelines and affect the quality of the treated water. Therefore, accurate detection of particles in the backwash water of waterworks filters is an important step in optimizing the backwashing process and ensuring the stable operation of the filters.

[0003] Existing water plant backwash water particle detection mainly uses general-purpose water particle counters. These devices are primarily designed for conventional drinking water or industrial wastewater and have the following drawbacks: First, they are not optimized for the high flow rate, high impurity concentration, and wide particle size distribution of backwash water. The detection accuracy is easily affected by large particles and cannot accurately identify key particles such as filter media debris. Second, the transparent tube of the detection core is easily covered by silt and flocs in the backwash water, forming a stubborn layer of dirt that distorts the optical detection signal. Furthermore, existing equipment lacks automatic cleaning functions, requiring frequent shutdowns for manual disassembly and cleaning, which reduces the continuity of the filter backwash process. Third, the sealing structure does not take into account the humid and corrosive water environment of water plants, making it prone to leakage and corrosion failure, and unable to meet the requirements of long-term stable operation of water plants. Summary of the Invention

[0004] Based on the technical problems existing in the background art, the present invention proposes a particle detection device for backwash water of water plant filter.

[0005] The present invention proposes a particle size analyzer body for backwashing water in a water plant filter, comprising a particle size analyzer body and a transparent detection tube. The particle size analyzer body is equipped with two connecting tubes, and the two ends of the transparent detection tube are respectively connected to the two connecting tubes. The transparent detection tube is provided with two sealing installation mechanisms, which are used to fix and seal the two ends of the transparent detection tube to the two connecting tubes respectively.

[0006] The particle size analyzer body is also equipped with a detection module, which is used to detect particles in the water liquid passing through the detection section of the detection transparent tube;

[0007] The transparent detection tube is equipped with a cleaning mechanism that can clean the inner wall of the detection section of the transparent detection tube.

[0008] Preferably, the sealing installation mechanism includes an installation sleeve, a positioning bevel block, an installation nut, a sealing ring, and a sealing assembly; the installation sleeve is slidably fitted onto the end of the detection transparent tube, the positioning bevel block is fixedly installed on the outer periphery of the connecting tube, the installation sleeve has a positioning groove adapted to the positioning bevel block, the installation nut is rotatably fitted onto the connecting tube, and the installation nut is spirally connected to the installation sleeve;

[0009] The sealing ring is used to ensure the sealing performance at the connection between the transparent tube and the connecting tube.

[0010] The sealing assembly is used to improve the sealing performance at the connection between the transparent tube and the connecting tube.

[0011] Preferably, the sealing ring includes a sealing gasket; the sealing ring is placed at the connection between the detection transparent tube and the connecting tube, and an annular channel is formed inside the sealing gasket, the annular channel being filled with water.

[0012] The sealing assembly is used to add or remove water within the annular channel.

[0013] Preferably, the sealing assembly includes a liquid storage cylinder, a piston rod, and a connecting pipe; the liquid storage cylinder is fixedly installed inside the mounting sleeve, and a water storage cavity is provided inside the liquid storage cylinder; one end of the piston rod is slidably disposed in the water storage cavity, and the other end of the piston rod passes through the liquid storage cylinder and extends into the positioning groove; the other end of the liquid storage cylinder can slide and cooperate with the inclined surface of the positioning inclined block.

[0014] The two ends of the connecting pipe are respectively connected to the water storage chamber and the annular channel.

[0015] Preferably, the cleaning mechanism includes an electric telescopic rod, a first hemisphere, a second hemisphere, an elastic cleaning component, and a cleaning control component; the electric telescopic rod is fixedly installed inside the detection transparent tube, and the axis of the electric telescopic rod coincides with the axis of the detection section of the detection transparent tube; the first hemisphere is fixedly installed on the output shaft of the electric telescopic rod; the second hemisphere is installed on the side of the first hemisphere away from the electric telescopic rod; the first and second hemispheres can be combined into a sphere, and an annular working cavity is formed inside the sphere, the working cavity being located at the joint of the first and second hemispheres;

[0016] The elastic cleaning component can be housed inside the working chamber, and the elastic cleaning component can also extend to the outside of the sphere;

[0017] The cleaning control component is used to adjust the position of the elastic cleaning component, and the cleaning control component can also adjust the distance between the first hemisphere and the second hemisphere.

[0018] Preferably, the elastic cleaning component includes a wear-resistant elastic rubber sheet and a nylon wear-resistant brush; the wear-resistant elastic rubber sheet is installed in the working chamber and divides the working chamber into an expansion chamber and a cleaning chamber arranged in inner and outer rings; the nylon wear-resistant brush is bonded to the surface of the wear-resistant elastic rubber sheet and is located on the side of the wear-resistant elastic rubber sheet located in the cleaning chamber.

[0019] Preferably, the elastic cleaning component further includes elastic ropes; there are multiple elastic ropes arranged in a ring array on the inner wall of the expansion cavity, and the two ends of the elastic ropes are respectively connected to the inner wall of the expansion cavity and the wear-resistant elastic rubber sheet.

[0020] Preferably, the cleaning control component includes a water tank and a water rod; the water tank is fixedly installed in the first hemisphere, a sliding cavity is provided inside the water tank, a piston plate is slidably installed in the sliding cavity, one end of the water rod is fixedly connected to the second hemisphere, and the other end of the water rod passes through the first hemisphere and the water tank and extends into the sliding cavity to be fixedly connected to the piston plate.

[0021] Preferably, the cleaning control assembly further includes a first valve, a second valve, an inlet pipe, a third valve, and a fourth valve; the piston plate divides the sliding chamber into a first chamber and a second chamber arranged left and right; the first valve is connected to the first chamber; the second valve is connected to the second chamber; one end of the inlet pipe is connected to the second valve; an expansion pipe connected to the first valve is also installed in the first hemisphere; both ends of the third valve are connected to the first chamber and the expansion chamber, respectively; and both ends of the fourth valve are connected to the second chamber and the cleaning chamber, respectively.

[0022] The first hemisphere is equipped with a return pipe that communicates with the expansion chamber.

[0023] The first hemisphere is also equipped with a drain pipe that communicates with the cleaning chamber.

[0024] Preferably, the cleaning mechanism further includes a telescopic protective sleeve; the telescopic protective sleeve is fitted onto the electric telescopic rod, and the inlet pipe, return pipe, drain pipe and expansion pipe are all located inside the telescopic protective sleeve;

[0025] The particle size analyzer is equipped with a sealed protective cover that covers the outer periphery of the transparent detection tube and the connecting tube.

[0026] The particle detection device for backwash water of water plant filter proposed in this invention has the following beneficial effects: by setting up a particle size detector body, a detection transparent tube, a connecting tube, a sealing installation mechanism, a detection module, and a cleaning mechanism, it can automatically and periodically clean the inner wall of the detection section of the detection transparent tube to ensure the results of water particle size detection. In addition, it can also perform self-cleaning treatment on the cleaning mechanism to ensure that the inner wall of the detection section can be cleaned multiple times, ensuring the cleaning effect each time and reducing the need for disassembly and cleaning. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a particle detection device for backwash water of a water plant filter proposed in this invention.

[0028] Figure 2 This is a schematic diagram of the structure of the open sealing protective cover in a water plant filter backwash water particle detection device proposed in this invention;

[0029] Figure 3 This is a cross-sectional view of the transparent tube and the connecting tube in a particle detection device for backwash water of a water plant filter proposed in this invention.

[0030] Figure 4 This is a cross-sectional view of the connection between the transparent tube and the connecting tube in a water plant filter backwash water particle detection device proposed in this invention.

[0031] Figure 5 This is a cross-sectional view of the first and second hemispheres combined together in a water plant filter backwash water particle detection device proposed in this invention.

[0032] Figure 6 This is a cross-sectional view of the No. 1 and No. 2 hemispheres in a water plant filter backwash water particle detection device proposed in this invention, when they are open and in operation.

[0033] Figure 7 This is a cross-sectional view of the water tank and water rod in a backwash water particle detection device for a water plant filter proposed in this invention.

[0034] In the diagram: 1. Particle size analyzer body; 2. Transparent detection tube; 3. Connecting tube; 4. Mounting sleeve; 5. Positioning inclined block; 6. Mounting nut; 7. Sealing gasket; 8. Liquid storage cylinder; 9. Piston rod; 10. Flow tube; 11. Electric telescopic rod; 12. Hemisphere 1; 13. Hemisphere 2; 14. Wear-resistant elastic rubber sheet; 15. Nylon wear-resistant brush; 16. Expansion chamber; 17. Cleaning chamber; 18. Elastic rope; 19. Water tank; 20. Water rod; 21. Valve 1; 22. Valve 2; 23. Inlet pipe; 24. Valve 3; 25. Valve 4; 26. Return pipe; 27. Chamber 1; 28. Chamber 2; 29. ​​Drain pipe; 30. Telescopic protective sleeve; 31. Sealing protective cover. Detailed Implementation

[0035] Reference Figures 1-7This invention proposes a particle size analyzer for backwash water in a water plant filter, comprising a particle size analyzer body 1 and a transparent detection tube 2. The transparent detection tube 2 includes two coarse tubes, two conical tubes, and one fine tube. The two ends of the fine tube are connected to the small-diameter ends of the two conical tubes, and the large-diameter ends of the two conical tubes are connected to the ends of the two coarse tubes. The fine tube is the detection section, with an inner diameter of 50-80 mm designed according to the conventional flow rate of the backwash water in the water plant filter, and a length of 300 mm. Two connecting pipes 3 are installed on the particle size analyzer body 1, and the two ends of the transparent detection tube 2 are connected to the two connecting pipes 3. Two sealing installation mechanisms are provided on the transparent detection tube 2 to connect the two ends of the transparent detection tube 2 to the two connecting pipes 3. The connecting pipe 3 is fixedly and sealed. The particle size analyzer body 1 is also equipped with a detection module (which uses a high-power infrared LED light source to penetrate the detection section, an anti-interference photoelectric sensor to receive the signal, and combines a turbidity compensation algorithm to correct the signal distortion caused by the turbidity of the backwash water, and the data processing unit to output particle content and particle size distribution data in real time). The detection module includes existing components such as a light source assembly (laser or high-brightness LED), a photoelectric detection unit (photodiode, photomultiplier tube or CMOS sensor), a signal processing module (including a signal amplifier, filter and analog-to-digital converter (ADC)), and a data processing unit (microprocessor). The detection module is used to detect particles in the water in the detection section of the detection transparent pipe 2 (adapted to backwash). For the detection of particles in water ranging from 10μm to 1000μm (e.g., filter media debris, silt, etc.), the particle size detection principle in water is as follows: backwash water flows into the transparent detection tube 2 through the connecting guide pipe 3. Detection light emitted by a laser source penetrates the detection section and illuminates the backwash water. The photoelectric sensor receives the transmitted light signal. When particles in the water pass through the detection section, they block the light. The amount of light attenuation is proportional to the particle size. The data processing unit calculates the attenuation signal to determine the number, particle size distribution, and concentration of particles in the backwash water. During the long-term flow of backwash water through the transparent detection tube 2, stubborn dirt such as silt, filter media debris, and microbial flocs easily adhere to its inner wall, causing scattering and absorption of the detection light, leading to photoelectric sensor... The distortion of the signal received by the sensor affects the detection accuracy. Therefore, this device is equipped with a cleaning mechanism to automatically clean the inner wall of the detection section of the transparent detection tube 2. The design includes a cleaning mechanism installed on the transparent detection tube 2, which cleans the inner wall of the detection section. After prolonged use, the cleaning mechanism cleans the detection section of the transparent detection tube 2, reducing the impact on the water particle size detection results and ensuring accuracy. Furthermore, after cleaning the inner wall of the detection section, the cleaning mechanism itself needs to be self-cleaned to facilitate future cleaning and ensure effective cleaning. No manual operation or replacement of the entire instrument is required, making it convenient to use.

[0036] like Figure 2 and Figure 3 As shown, the sealing installation mechanism includes an installation sleeve 4, a positioning bevel block 5, an installation nut 6, a sealing ring, and a sealing assembly. The installation sleeve 4 is slidably fitted onto the end of the detection transparent tube 2. The positioning bevel block 5 is fixedly installed on the outer periphery of the connecting tube 3. The installation sleeve 4 has a positioning groove that matches the positioning bevel block 5. The installation nut 6 is rotatably fitted onto the connecting tube 3. The installation nut 6 and the installation sleeve 4 are screwed together. The sealing ring is used to ensure the sealing at the connection between the detection transparent tube 2 and the connecting tube 3. The sealing assembly is used to lift the detection transparent tube 2 and the connecting tube 3. The sealing of the connection between the connecting pipe 3 is crucial in actual use. When installing the transparent detection pipe 2, because water passes through it, it is necessary to ensure the sealing of the joint between the transparent detection pipe 2 and the connecting pipe 3 to prevent water leakage, pollution, and waste. The positioning inclined block 5 restricts the position of the installation sleeve 4, and the installation nut 6 is used to connect the installation sleeve 4 with the thread to fix the installation sleeve 4 and the transparent detection pipe 2. In addition, the sealing components and sealing rings ensure the sealing of the joint between the transparent detection pipe 2 and the connecting pipe 3.

[0037] like Figure 3 and Figure 4 As shown, the sealing ring includes a sealing gasket 7; the sealing ring is placed between the connection between the transparent detection tube 2 and the connecting tube 3. An annular channel is formed inside the sealing gasket 7, and the annular channel is filled with water. The sealing assembly is used to add or remove water from the annular channel. During installation, because the detection section of the transparent detection tube 2 is a thin tube, to reduce uneven stress and potential breakage, the two connecting tubes 3 are fixedly installed on the particle size analyzer body 1. The axes of the bent sections of the two connecting tubes 3 coincide, ensuring that the axes of the transparent detection tube 2 and the connecting tube 3 coincide after installation, thus preventing the transparent detection tube 2 from being misaligned due to installation deviation. In cases of breakage due to external force, in practice, due to manufacturing processes, there may be slight tolerances in the length of the transparent tube 2, which could lead to leakage after installation. To facilitate the installation of the transparent tube 2 between the two connecting tubes 3 (the sealing gasket 7 is too thick, making it inconvenient for the transparent tube 2 to be installed between the two connecting tubes 3), water is added to the annular channel through the sealing assembly, causing the middle part of the sealing assembly to expand and fit into the sealing groove on the end face of the transparent tube 2 and the connecting tube 3, thereby ensuring the sealing between the transparent tube 2 and the connecting tube 3.

[0038] like Figure 4As shown, the sealing assembly includes a liquid storage cylinder 8, a piston rod 9, and a flow tube 10. The liquid storage cylinder 8 is fixedly installed inside the mounting sleeve 4, and a water storage cavity is provided inside the liquid storage cylinder 8. One end of the piston rod 9 is slidably disposed in the water storage cavity, and the other end of the piston rod 9 passes through the liquid storage cylinder 8 and extends into the positioning groove. The other end of the liquid storage cylinder 8 can slide and engage with the inclined surface of the positioning inclined block 5. The two ends of the flow tube 10 are respectively connected to the water storage cavity and the annular channel. When installing the detection transparent tube 2, first slide the two mounting sleeves 4 to fit them onto the detection transparent tube 2, and then install the detection transparent tube 2 between the two connecting tubes 3 (the sealing gasket 7 is located at the detection...). (At the end of the transparent tube 2), slide two mounting sleeves 4 and fit them onto the two connecting tubes 3 respectively. Ensure that the positioning inclined block 5 is engaged in the positioning groove of the mounting sleeve 4. Then rotate the mounting nut 6 and the mounting sleeve 4 to connect them together, so that the transparent tube 2 is securely installed. During installation, the end of the piston rod 9 will slide along the inclined surface of the positioning inclined block 5, so that the piston rod 9 slides in the liquid storage cylinder 8. The liquid in the liquid storage cylinder 8 is squeezed into the annular channel, causing the middle position of the sealing gasket 7 to expand and press against the sealing groove, ensuring the sealing between the transparent tube 2 and the connecting tube 3.

[0039] like Figure 3 , Figure 5 and Figure 6As shown, the cleaning mechanism includes an electric telescopic rod 11, a first hemisphere 12, a second hemisphere 13, an elastic cleaning component, and a cleaning control component. The electric telescopic rod 11 is fixedly installed inside the detection transparent tube 2, with its axis coinciding with the axis of the detection section of the detection transparent tube 2. The first hemisphere 12 is fixedly installed on the output shaft of the electric telescopic rod 11. The second hemisphere 13 is installed on the side of the first hemisphere 12 away from the electric telescopic rod 11. The first hemisphere 12 and the second hemisphere 13 can be combined into a single sphere, the diameter of which is slightly smaller than the inner diameter of the detection section. An annular working cavity is formed inside the sphere, located at the junction of the first hemisphere 12 and the second hemisphere 13. The elastic cleaning component can be housed within the working cavity and can also extend to the outside of the sphere. The cleaning control component is used for adjustment. The position of the elastic cleaning component and the cleaning control component can also adjust the distance between the first hemisphere 12 and the second hemisphere 13. In actual operation, after long-term use, the cleaning control component adjusts the distance between the first hemisphere 12 and the second hemisphere 13, and then adjusts the elastic cleaning component to extend out of the gap after the first hemisphere 12 and the second hemisphere 13 are opened, and expands. After the elastic cleaning component expands, it presses against the inner wall of the detection section. The electric telescopic rod 11 drives the first hemisphere 12 and the second hemisphere 13 to move back and forth synchronously, driving the elastic cleaning component to move back and forth and wipe the inner wall of the detection section. In addition, the expansion degree of the elastic cleaning component can be adjusted according to the stubbornness of the dirt on the inner wall of the detection section, thereby completing the cleaning of the dirt on the inner wall of the detection section and ensuring the cleaning effect.

[0040] like Figure 5 and Figure 6As shown, the elastic cleaning assembly includes a wear-resistant elastic rubber sheet 14 and a nylon wear-resistant brush 15. The wear-resistant elastic rubber sheet 14 is installed inside the working chamber. When the first hemisphere 12 and the second hemisphere 13 are combined, the working chamber is a relatively closed space isolated from the outside world. The wear-resistant elastic rubber sheet 14 divides the working chamber into an expansion chamber 16 and a cleaning chamber 17 arranged in inner and outer rings. The nylon wear-resistant brush 15 is bonded to the surface of the wear-resistant elastic rubber sheet 14 and is located on the side of the wear-resistant elastic rubber sheet 14 within the cleaning chamber 17. During the cleaning process, the entry of water into the detection transparent tube 2 is stopped by the cleaning control assembly. The first hemisphere 12 and the second hemisphere 13 are separated by the control unit, and then the wear-resistant elastic rubber sheet 14 is expanded and protruded into the gap after the first hemisphere 12 and the second hemisphere 13 are opened, forming a ring-shaped cleaning circle. The expansion degree of the wear-resistant elastic rubber sheet 14 is adjusted according to the stubbornness of the dirt on the inner wall of the detection section, ensuring that the nylon wear-resistant brush 15 abuts against the inner wall of the detection section, so as to achieve a better cleaning effect for dirt of different stubbornness. In addition, when cleaning is not required, the wear-resistant elastic rubber sheet 14 and the nylon wear-resistant brush 15 are stored in the working chamber to avoid affecting the flow of water.

[0041] like Figure 5 and Figure 6 As shown, the elastic cleaning component also includes elastic cords 18; there are multiple elastic cords 18, which are arranged in a ring array on the inner wall of the expansion cavity 16. The two ends of the elastic cords 18 are connected to the inner wall of the expansion cavity 16 and the wear-resistant elastic rubber sheet 14, respectively. The end of the elastic cord 18 is connected to the wear-resistant elastic rubber sheet 14 near the middle. Under the rebound action of the elastic cords 18, the wear-resistant elastic rubber sheet 14 is pulled and retracted into the working cavity, which makes it easier for the wear-resistant elastic rubber sheet 14 and the nylon wear-resistant brush 15 to be completely stored in the working cavity, and makes it easier for the first hemisphere 12 and the second hemisphere 13 to be combined into a complete sphere.

[0042] like Figure 5 , Figure 6 and Figure 7 As shown, the cleaning control assembly includes a water tank 19 and a water rod 20. The water tank 19 is fixedly installed inside the first hemisphere 12. A sliding cavity is provided inside the water tank 19, and a piston plate is slidably installed inside the sliding cavity. One end of the water rod 20 is fixedly connected to the second hemisphere 13, and the other end of the water rod 20 passes through the first hemisphere 12 and the water tank 19 and extends into the sliding cavity to be fixedly connected to the piston plate. By sliding the piston plate and the water rod 20 inside the water tank 19, the distance between the first hemisphere 12 and the second hemisphere 13 can be adjusted.

[0043] like Figure 5 , Figure 6 and Figure 7As shown, the cleaning control assembly also includes valve 21, valve 22, inlet pipe 23, valve 24, and valve 25. Valve 21, valve 22, valve 24, and valve 25 are all miniature electromagnetic directional valves, electrically connected to the control unit of the particle size analyzer body 1. The piston plate divides the sliding chamber into chamber 27 and chamber 28 arranged left and right. Valve 21 is connected to chamber 27, and valve 22 is connected to chamber 28. One end of the inlet pipe 23 is connected to valve 22. An expansion pipe connected to valve 21 is also installed inside hemisphere 12. Valve 24... The two ends of valve 25 are connected to chamber 27 and expansion chamber 16 respectively. The two ends of valve 25 are connected to chamber 28 and cleaning chamber 17 respectively. A return pipe 26 connected to expansion chamber 16 is installed inside hemisphere 12. A drain pipe 29 connected to cleaning chamber 17 is also installed inside hemisphere 12. In the specific operation, the pump first works to inject water into chamber 28 through inlet pipe 23 (valve 21 is closed, valve 24 is open, and valve 25 is closed), which drives the piston plate and water rod 20 to slide, so that hemisphere 12 and hemisphere 13 separate and are adjusted to a suitable distance. Then close valve 22, open valve 21, and close the valve of return pipe 26. Water enters chamber 27 through the expansion pipe and then into expansion chamber 16, causing the wear-resistant elastic rubber sheet 14 to expand and bulge. The nylon wear-resistant brush 15 follows suit, ensuring it adheres to the inner wall of the testing section for cleaning. After cleaning, open the valve of return pipe 26, draining the water from expansion chamber 16. Under the elastic recovery of the wear-resistant elastic rubber sheet 14 and the pulling action of the elastic rope 18, the wear-resistant elastic rubber sheet 14 and the nylon wear-resistant brush 15... 5. Retract into the working chamber, then open valve 21, close valve 24, and open valve 22, causing the water in chamber 28 to flow back from the inlet pipe 23, causing the water rod 20 to retract, and causing hemisphere 12 and hemisphere 23 to merge into one sphere. Close valve 21 and valve 24, and open valve 22 and valve 4. The water enters chamber 28 and then enters cleaning chamber 17. The water washes away the dirt on the nylon wear-resistant brush 15 and also washes the wear-resistant elastic rubber sheet 14, achieving a cleaning effect and facilitating the cleaning of the inner wall of the detection section next time.

[0044] like Figure 6 As shown, the cleaning mechanism also includes a telescopic protective sleeve 30; the telescopic protective sleeve 30 is fitted onto the electric telescopic rod 11, and the inlet pipe 23, return pipe 26, drain pipe 29 and expansion pipe are all located inside the telescopic protective sleeve 30. The telescopic protective sleeve 30 protects the inlet pipe 23, return pipe 26, drain pipe 29 and expansion pipe, preventing the four pipes from affecting the flow of water when bending, and ensuring the detection effect of water particle size.

[0045] like Figure 1 As shown, a sealed protective cover 31 is installed on the particle size analyzer body 1, covering the outer periphery of the detection transparent tube 2 and the connecting tube 3. The sealed protective cover 31 protects the detection module and the detection transparent tube 2, ensuring that they are not affected by the outside world.

[0046] Automatic cleaning process: The control unit triggers cleaning via a timer (e.g., every 8 hours) or when the feedback signal from the detection module attenuates by ≥15%: ① Close the inlet valve of connecting pipe 3 and open the drain valve to drain the backwash water from the transparent detection tube 2; ② Open valve 22, allowing clean water to enter chamber 28 through inlet pipe 23, pushing the water rod 20 to separate hemisphere 12 from hemisphere 13; ③ Open valve 21 and valve 24, allowing clean water to enter expansion chamber 16, pushing... ④ The wear-resistant elastic rubber sheet 14 expands, and the nylon wear-resistant brush 15 adheres to the inner wall of the detection section; ⑤ The electric telescopic rod 11 reciprocates, and the nylon wear-resistant brush 15 wipes the inner wall; ⑥ After cleaning, the return pipe 26 is opened to release pressure, and the elastic rope 18 pulls the rubber sheet to retract; ⑦ The fourth valve 25 is opened, and clean water is flushed through the spray hole to rinse the nylon wear-resistant brush 15, while sewage is discharged through the drain pipe 29; ⑧ The second chamber 28 is depressurized, and the first hemisphere merges with the second hemisphere, restoring the detection state.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A particle detection device for backwash water of a water plant filter, characterized in that, The device includes a particle size analyzer body (1) and a detection transparent tube (2). Two connecting tubes (3) are installed on the particle size analyzer body (1). The two ends of the detection transparent tube (2) are respectively connected to the two connecting tubes (3). Two sealing installation mechanisms are provided on the detection transparent tube (2). The two sealing installation mechanisms are used to fix and seal the two ends of the detection transparent tube (2) to the two connecting tubes (3) respectively. The particle size analyzer body (1) is also equipped with a detection module, which is used to detect particles in the water liquid after passing through the detection transparent tube (2); A cleaning mechanism is installed on the detection transparent tube (2), which can clean the inner wall of the detection section of the detection transparent tube (2).

2. The particle detection device for backwash water of a water plant filter as described in claim 1, characterized in that, The sealing installation mechanism includes an installation sleeve (4), a positioning bevel block (5), an installation nut (6), a sealing ring, and a sealing assembly; the installation sleeve (4) is slidably fitted onto the end of the detection transparent tube (2), the positioning bevel block (5) is fixedly installed on the outer periphery of the connecting tube (3), the installation sleeve (4) has a positioning groove adapted to the positioning bevel block (5), the installation nut (6) is rotatably fitted onto the connecting tube (3), and the installation nut (6) is spirally connected to the installation sleeve (4); The sealing ring is used to ensure the sealing of the connection between the transparent tube (2) and the connecting tube (3); The sealing assembly is used to improve the sealing performance at the connection between the transparent tube (2) and the connecting tube (3).

3. The particle detection device for backwash water of a water plant filter as described in claim 2, characterized in that, The sealing ring includes a sealing gasket (7); the sealing ring is placed between the connection between the detection transparent tube (2) and the connecting tube (3), and an annular channel is formed in the sealing gasket (7), and the annular channel is filled with water. The sealing assembly is used to add or remove water within the annular channel.

4. The particle detection device for backwash water of a water plant filter as described in claim 3, characterized in that, The sealing assembly includes a liquid storage cylinder (8), a piston rod (9), and a flow pipe (10); the liquid storage cylinder (8) is fixedly installed in the mounting sleeve (4), and a water storage cavity is provided in the liquid storage cylinder (8). One end of the piston rod (9) is slidably disposed in the water storage cavity, and the other end of the piston rod (9) passes through the liquid storage cylinder (8) and extends into the positioning groove. The other end of the liquid storage cylinder (8) can slide and cooperate with the inclined surface of the positioning inclined block (5). The two ends of the flow tube (10) are respectively connected to the water storage cavity and the annular channel.

5. The particle detection device for backwash water of a water plant filter as described in claim 1, characterized in that, The cleaning mechanism includes an electric telescopic rod (11), a first hemisphere (12), a second hemisphere (13), an elastic cleaning component, and a cleaning control component; the electric telescopic rod (11) is fixedly installed inside the detection transparent tube (2), the axis of the electric telescopic rod (11) coincides with the axis of the detection section of the detection transparent tube (2), the first hemisphere (12) is fixedly installed on the output shaft of the electric telescopic rod (11), the second hemisphere (13) is installed on the side of the first hemisphere (12) away from the electric telescopic rod (11), the first hemisphere (12) and the second hemisphere (13) can be combined into a sphere, and an annular working cavity is opened in the sphere, the working cavity is located at the splice of the first hemisphere (12) and the second hemisphere (13); The elastic cleaning component can be housed inside the working chamber, and the elastic cleaning component can also extend to the outside of the sphere; The cleaning control component is used to adjust the position of the elastic cleaning component, and the cleaning control component can also adjust the distance between the first hemisphere (12) and the second hemisphere (13).

6. The particle detection device for backwash water of a water plant filter as described in claim 5, characterized in that, The elastic cleaning component includes a wear-resistant elastic rubber sheet (14) and a nylon wear-resistant brush (15); the wear-resistant elastic rubber sheet (14) is installed in the working chamber and divides the working chamber into an expansion chamber (16) and a cleaning chamber (17) arranged in inner and outer rings. The nylon wear-resistant brush (15) is bonded to the surface of the wear-resistant elastic rubber sheet (14) and is located on the side of the wear-resistant elastic rubber sheet (14) located in the cleaning chamber (17).

7. A particle detection device for backwash water of a water plant filter according to claim 6, characterized in that, The elastic cleaning component also includes elastic ropes (18); there are multiple elastic ropes (18), and the multiple elastic ropes (18) are arranged in a ring array on the inner wall of the expansion cavity (16). The two ends of the elastic ropes (18) are respectively connected to the inner wall of the expansion cavity (16) and the wear-resistant elastic rubber sheet (14).

8. The particle detection device for backwash water of a water plant filter as described in claim 7, characterized in that, The cleaning control assembly includes a water tank (19) and a water rod (20); the water tank (19) is fixedly installed inside the first hemisphere (12), and a sliding cavity is provided inside the water tank (19). A piston plate is slidably installed inside the sliding cavity. One end of the water rod (20) is fixedly connected to the second hemisphere (13), and the other end of the water rod (20) passes through the first hemisphere (12) and the water tank (19) and extends into the sliding cavity to be fixedly connected to the piston plate.

9. A particle detection device for backwash water of a water plant filter as described in claim 8, characterized in that, The cleaning control assembly also includes valve 1 (21), valve 2 (22), inlet pipe (23), valve 3 (24), and valve 4 (25); the piston plate divides the sliding chamber into chamber 1 (27) and chamber 2 (28) arranged left and right; valve 1 (21) is connected to chamber 1 (27); valve 2 (22) is connected to chamber 2 (28); one end of inlet pipe (23) is connected to valve 2 (22); an expansion pipe connected to valve 1 (21) is installed in hemisphere 1 (12); both ends of valve 3 (24) are connected to chamber 1 (27) and expansion chamber (16) respectively; both ends of valve 4 (25) are connected to chamber 2 (28) and cleaning chamber (17) respectively. The first hemisphere (12) is equipped with a return pipe (26) that communicates with the expansion chamber (16). The first hemisphere (12) is also equipped with a drain pipe (29) that is connected to the cleaning chamber (17).

10. A particle detection device for backwash water of a water plant filter according to claim 9, characterized in that, The cleaning mechanism also includes a telescopic protective sleeve (30); the telescopic protective sleeve (30) is fitted on the electric telescopic rod (11), and the liquid inlet pipe (23), liquid return pipe (26), sewage discharge pipe (29) and expansion pipe are all located inside the telescopic protective sleeve (30); The particle size analyzer body (1) is equipped with a sealed protective cover (31) covering the outer periphery of the detection transparent tube (2) and the connecting tube (3).

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