Intelligent sewage device for monitoring water quality of municipal water supply network

Abstract

This utility model discloses an intelligent sewage discharge device for monitoring water quality in municipal water supply networks, belonging to the field of municipal water supply sewage discharge technology. The device includes a connected integrated crushing box and a filter box. Inclined filter plates and vertical depth filter plates are arranged at intervals along the water flow direction inside the filter box, dividing the interior into first, second, and third zones. A sewage outlet is located at the bottom of the filter box, and a return outlet is located at the top. The outlet is connected to the downstream pipeline and the return pipe via a three-way valve, with the other end of the return pipe connected to the return outlet. The sensing unit of the water quality detector extends into the third zone to monitor water quality in real time. When the water quality fails to meet standards, the three-way valve switches the water path, and the water flows back to the second zone through the return pipe to flush the filter plates. Simultaneously, the water participates in filtration again until the water quality meets standards, at which point water supply is restored. This device realizes online water quality monitoring, automatic return and reprocessing of substandard water, and online sewage discharge using return flushing, reducing the risk of filter plate clogging and ensuring a continuous supply of qualified water to the pipeline network.

Description

Technical Field

[0001] This utility model belongs to the field of municipal water supply and sewage discharge technology, specifically relating to an intelligent sewage discharge device for monitoring water quality in municipal water supply networks. Background Technology

[0002] Water supply networks are a crucial component of urban water supply systems, and the quality of the water they deliver directly affects the safety of residents' drinking water and the stable operation of various water facilities. During long-term operation, corrosion and scaling can cause rust particles and debris to accumulate on the inner walls of the network. Simultaneously, external solid impurities such as sediment and pebbles may enter the network due to pipeline maintenance, water outages, or valve operations. These impurities not only gradually accumulate and clog the pipes, reducing water delivery capacity, but can also damage precision components such as water meters and valves. More seriously, the microorganisms and pollutants carried by these impurities can lead to increased turbidity and bacterial growth at the end of the network, affecting the safety and hygiene of the water supply.

[0003] To address this, various sewage discharge and decontamination devices for water supply networks have emerged in the prior art. These devices connect filtration equipment to the network to remove solid impurities and some pollutants from the water through mechanical interception and adsorption, thereby ensuring clean effluent. For example, utility model patent application CN202323585688.8 discloses a sewage discharge and decontamination device for water supply networks. This device uses a crushing roller to pre-treat larger solid impurities by crushing them, and then uses filter plates and filter blocks composed of multiple layers of filter material to purify the water step by step. It also features a cleaning port and a removable sealing plate for easy periodic maintenance. This device effectively solves the problem of large impurities clogging the filter screen and reduces the frequency of manual cleaning. However, this device still has significant shortcomings in practical applications: it can only perform unidirectional physical filtration of water, lacking online monitoring of the filtered water quality. If the filter blocks fail or the raw water quality fluctuates, substandard water will still be directly discharged into the downstream pipe network. Secondly, the filter plate structure it uses easily leads to the accumulation and compaction of impurities, which are difficult to completely remove by simply cleaning the ports. Furthermore, the device cannot perform secondary treatment of substandard water, resulting in a forced shutdown and filter replacement when filtration performance declines, affecting the continuous water supply of the pipe network. Therefore, there is an urgent need to improve the existing technology to solve the problems of existing sewage discharge and decontamination devices being unable to monitor the filtered water quality online, unable to automatically re-treat substandard water, and having unstable filtration effects due to incomplete removal of filtered impurities. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an intelligent sewage discharge device for monitoring water quality in municipal water supply networks, so as to solve the problems that existing sewage discharge and decontamination devices cannot monitor the water quality after filtration online, cannot automatically reprocess substandard water, and have unstable filtration effects due to incomplete removal of filtered impurities.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A smart sewage discharge device for monitoring water quality in municipal water supply networks includes a crushing box and a filter box. The crushing box and the filter box are integrally formed and internally connected. An inlet is provided at one end of the crushing box, and a crushing mechanism is installed inside the crushing box. An outlet is provided at the end of the filter box away from the inlet, and a filtration mechanism is installed inside the filter box. The filtration mechanism includes a filter inclined plate and a depth filter plate, which are arranged at intervals along the water flow direction, dividing the interior of the filter box into a first region, a second region, and a third region. The first region is connected to the crushing box. The filter inclined plate is inclinedly positioned between the first region and the second region, and the depth filter plate is vertically fixedly installed between the second region and the third region. The bottom of the filter box... The filter box is equipped with a drain outlet located in the first area; a return outlet is located at the top of the filter box in the second area; it also includes a three-way valve, a return pipe, and a water quality analyzer; the three-way valve has a valve inlet, a downstream outlet, and a return outlet, and the valve inlet of the three-way valve is connected to the outlet of the filter box; one end of the return pipe is connected to the return outlet of the three-way valve, and the other end of the return pipe is connected to the return outlet at the top of the filter box; the sensing unit of the water quality analyzer extends through the outer wall of the filter box into the third area to monitor the water quality after filtration by the depth filter plate in real time; when the water quality analyzer detects that the water quality is substandard, it controls the three-way valve to switch the water path, and the water flows back to the second area through the return pipe.

[0007] Furthermore, the upper end of the filter inclined plate is fixedly connected to the upper inner wall of the filter box, and the lower end of the filter inclined plate is fixedly connected to the lower inner wall of the filter box. The filter inclined plate is inclined from the upper end to the lower end towards the drain outlet, and the surface of the filter inclined plate forms an acute angle with the horizontal direction. The drain outlet is located adjacent to the connection position between the lower end of the filter inclined plate and the lower inner wall of the filter box, and collects the impurities intercepted by the filter inclined plate. The return port is located above the filter inclined plate, and the water entering through the return port directly washes the surface of the filter inclined plate.

[0008] Furthermore, both the drain outlet and the return outlet have a funnel-shaped structure; the larger end of the funnel-shaped drain outlet is smoothly connected to the bottom inner wall of the filter box, and the smaller end of the funnel-shaped drain outlet is connected to the drain pipe; the larger end of the funnel-shaped return outlet is smoothly connected to the top inner wall of the filter box, and the smaller end of the funnel-shaped return outlet is connected to the return pipe.

[0009] Furthermore, a one-way valve is installed in series on the return pipe. The one-way valve is directed from the return outlet of the three-way valve to the return port of the filter box to prevent the water in the filter box from flowing back into the return pipe.

[0010] Furthermore, the sewage outlet is sealed to the inlet of the sewage pump through the sewage pipe, and the sewage pump is fixedly installed below the filter box to actively suck up and discharge the impurities accumulated at the sewage outlet.

[0011] Furthermore, the water quality analyzer also includes a display control unit, which is electrically connected to the sensing unit; the three-way valve includes an electric actuator, which is electrically connected to the display control unit, and controls the three-way valve to switch the water path when the water quality does not meet the standards.

[0012] Furthermore, a mounting frame is fixedly installed in the third area; the sensing unit includes multiple parallel and spaced sensing probes, which are fixedly installed in the third area via the mounting frame; the display control unit is fixedly installed on the outer wall of the filter box; the sensing unit and the display control unit are connected by a connecting pipe, which is a sealed tube passing through the side wall of the filter box; one end of the connecting pipe is fixedly connected to the mounting frame, and the other end is fixedly connected to the display control unit; a signal transmission line passes through the connecting pipe, and both ends of the signal transmission line are electrically connected to the sensing unit and the display control unit, respectively.

[0013] Furthermore, an upper limit block and a lower limit block are respectively provided on the inner wall of the filter box corresponding to the installation position of the depth filter plate; the upper limit block is fixed to the top inner wall of the filter box, and the lower limit block is fixed to the bottom inner wall of the filter box; an installation groove adapted to the thickness of the depth filter plate is formed between the upper limit block and the lower limit block, and the upper and lower edges of the depth filter plate are respectively embedded in the installation groove to realize the vertical limiting and fixing of the depth filter plate.

[0014] Furthermore, a maintenance opening is provided on the top of the filter box corresponding to the position of the mounting slot; a removable cover plate is sealed and installed at the maintenance opening, and the cover plate is fastened to the filter box by a bolt assembly; the upper limit block is located below the maintenance opening, and the depth filter plate can be installed into or removed from the mounting slot through the maintenance opening.

[0015] The intelligent sewage discharge device for municipal water supply network water quality monitoring disclosed in this utility model is based on the combination of an inclined filter plate and a vertically arranged depth filter plate to form a two-stage filtration structure. A water quality detector is configured to monitor the effluent water quality in the third area online. When the water quality is found to be substandard, the water is guided back to the second area through a three-way valve via a return pipe. The return water is used to flush the surface of the filter plate from top to bottom, pushing the impurities trapped on the plate surface to the sewage outlet at the bottom. Compared with existing technologies, this utility model has significant advantages: it enables real-time online monitoring of filtered water quality, preventing substandard water from directly entering the downstream pipe network; substandard water can be automatically returned for secondary treatment without stopping the machine to replace the filter element, ensuring continuous water supply to the pipe network; the return port is located above the filter inclined plate, and the returned water washes and cleans the filter inclined plate while re-entering the filtration process, and impurities converge towards the discharge port under the action of gravity and water flow, effectively alleviating the problem of impurity caking on the filter plate and making the sewage discharge more thorough; the device has a compact overall structure, integrating crushing, filtering, detection, and return sewage discharge functions, making maintenance convenient and operation highly reliable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0017] Figure 2 A partial cross-sectional view of the overall structure of this utility model embodiment;

[0018] Figure 3 Axial cross-sectional view of the overall structure of this utility model embodiment;

[0019] Figure 4 for Figure 3 A schematic diagram of the transverse cross section along the AA direction;

[0020] Figure 5 This is a partial structural diagram showing the combination of the filter inclined plate with the drain port and return port;

[0021] Figure 6 This is a schematic diagram of the installation structure of a water quality testing instrument.

[0022] The following are the markings in the attached diagram:

[0023] 1. Crushing box; 2. Filter box; 3. Inlet; 4. Crushing mechanism; 5. Outlet; 6. Filtering mechanism; 7. Filter inclined plate; 8. Depth filter plate; 9. First zone; 10. Second zone; 11. Third zone; 12. Sewage outlet; 13. Return outlet; 14. Three-way valve; 15. Return pipe; 16. Water quality analyzer; 17. Sensing unit; 18. Sewage pipe; 19. Sewage pump; 20. Display control unit; 21. Electric actuator; 22. Mounting frame; 23. Connecting pipe; 24. Upper limit block; 25. Lower limit block; 26. Maintenance opening; 27. Cover plate; 28. Check valve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Existing water supply network sewage systems generally lack real-time monitoring of treated water quality and automatic disposal mechanisms for substandard water bodies. Furthermore, pre-filter structures are prone to clogging due to the accumulation of impurities, affecting filtration efficiency and requiring frequent manual cleaning.

[0027] Based on this, and to improve the problems in related technologies, embodiments of this application provide an intelligent sewage discharge device for monitoring water quality in municipal water supply networks, such as... Figures 1 to 5As shown, the device includes a crushing box 1 and a filter box 2. The crushing box 1 and the filter box 2 are integrally formed and internally connected. An inlet 3 is provided at one end of the crushing box 1, and a crushing mechanism 4 is provided inside the crushing box 1. An outlet 5 is provided at the end of the filter box 2 away from the inlet 3, and a filtration mechanism 6 is provided inside the filter box 2. The filtration mechanism 6 includes a filter inclined plate 7 and a depth filter plate 8. The filter inclined plate 7 and the depth filter plate 8 are arranged at intervals along the water flow direction, dividing the interior of the filter box 2 into a first region 9, a second region 10, and a third region 11. The first region 9 is connected to the crushing box 1. The filter inclined plate 7 is inclinedly positioned between the first region 9 and the second region 10, and the depth filter plate 8 is vertically fixed between the second region 10 and the third region 11. A drain outlet 12 is provided at the bottom of the filter box 2. Filter box 2 is located in the first area 9; the top of filter box 2 is provided with a return port 13, which is located in the second area 10; it also includes a three-way valve 14, a return pipe 15, and a water quality detector 16; the three-way valve 14 has a valve inlet, a downstream outlet, and a return outlet, and the valve inlet of the three-way valve 14 is connected to the outlet 5 of filter box 2; one end of the return pipe 15 is connected to the return outlet of the three-way valve 14, and the other end of the return pipe 15 is connected to the return port 13 at the top of filter box 2; the sensing unit 17 of the water quality detector 16 extends through the outer wall of filter box 2 into the third area 11 to detect the water quality after filtration by the depth filter plate 8 in real time; when the water quality detector 16 detects that the water quality is not up to standard, it controls the three-way valve 14 to switch the water path, and the water flows back to the second area 10 through the return pipe 15.

[0028] The crushing chamber 1 and the filter chamber 2 adopt an integrated molding structure, which can improve the sealing and stability of the overall structure and prevent water leakage. The inlet 3 is used to connect to the municipal water supply network to allow the water to be treated to enter the device. The crushing mechanism 4 adopts the existing crushing roller assembly, which is driven by a drive motor to rotate the crushing roller and crush larger solid impurities entering the crushing chamber 1, preventing large impurities from clogging the subsequent filter mechanism 6 and improving filtration efficiency. The filter mechanism 6 in the filter chamber 2 realizes the staged filtration of water. The filter inclined plate 7 is made of stainless steel filter mesh to intercept larger suspended impurities in the water. The depth filter plate 8 adopts a multi-layer composite filter structure stacked sequentially along the water flow direction. From the water-facing side to the back water-facing side, there are wire mesh layer, PP cotton layer, activated carbon layer and RO membrane layer. Each layer is bonded with waterproof adhesive and clamped and fixed by the outer stainless steel frame to form an integral plate structure, which is used to sequentially intercept suspended impurities, colloids, residual chlorine, organic matter and some dissolved pollutants of different particle sizes in the water to achieve deep purification. Zone 9 serves as the primary filtration zone, receiving water that has undergone crushing treatment. Zone 10 serves as the secondary filtration transition zone, and Zone 11 serves as the final filtration zone, ensuring that the water meets discharge standards after multi-stage filtration. A three-way valve 14 controls the water flow switching. A water quality analyzer 16 monitors the water quality in Zone 11 in real time. When the detected indicators exceed the preset standards, the three-way valve 14 is triggered to switch, causing the substandard water to flow back to Zone 10 for secondary filtration until the water quality meets the standards before being discharged into the pipeline network through the downstream outlet.

[0029] Specifically, the water to be treated in the municipal water supply network enters the crushing chamber 1 through inlet 3. The crushing mechanism 4 crushes large solid impurities carried in the water, preventing subsequent filter plate clogging. The crushed water flows into the first zone 9 of the filter chamber 2 and, under water pressure, passes upward through the inclined filter plate 7. The filter plate 7 traps larger impurities on its surface, while the water passes through the plate and enters the second zone 10. The water in the second zone 10 continues to flow forward, passing through the higher-precision depth filter plate 8 and entering the third zone 11, completing two-stage filtration. The sensing unit 17 of the water quality analyzer 16 extends into the third zone 11 to monitor the water treated by the depth filter plate 8 in real time. When the test results meet the set standards, the three-way valve 14 keeps the downstream outlet open, and the qualified water is directly supplied to the downstream pipeline network through the outlet 5 and the valve inlet. Once the water quality analyzer 16 detects that indicators such as turbidity, suspended solids, residual chlorine, and total organic carbon exceed the set thresholds, the display control unit 20 immediately sends a signal to the electric actuator 21 to drive the three-way valve 14 to switch the valve core position, close the downstream outlet, and open the return outlet. At this time, the water from the outlet 5 no longer enters the downstream area, but instead flows through the return outlet of the three-way valve 14, the check valve 28, and the return pipe 15, and is reinjected into the second area 10 from the return port 13 at the top of the filter box 2. The returned water washes the surface of the filter inclined plate 7 from top to bottom, flushing the impurities trapped on the filter inclined plate 7 along with the suspended solids carried in the water towards the bottom of the first area 9. The impurities settle naturally under gravity, collect through the funnel-shaped drain outlet 12, and are periodically or continuously pumped out by the sewage pump 19. The returned water then flows upwards through the inclined filter plate 7 and the depth filter plate 8, undergoing two more stages of filtration until the water quality tester 16 determines that it meets the standards, at which point the three-way valve 14 returns to the downstream water supply state.

[0030] This device employs a two-stage filtration structure consisting of a filter inclined plate 7 and a depth filter plate 8 within the filter box 2. Combined with a water quality analyzer 16 extending into the third zone 11 and a three-way valve 14 and return pipe 15 at the outlet 5, it enables online monitoring of the filtered water and automatic recirculation and retreatment of substandard water. The return port 13, located at the top of the second zone 10, allows the returned water to directly flush the water-facing surface of the filter inclined plate 7 while re-entering the filtration process. This effectively alleviates the problem of impurities accumulating and hardening on the plate surface. Compared to conventional structures that rely solely on bottom drainage, the filter plates are cleaned more promptly, and drainage efficiency is improved.

[0031] This utility model further proposes, such as Figure 2 , Figure 3 as well as Figure 5As shown, the upper end of the filter inclined plate 7 is fixedly connected to the upper inner wall of the filter box 2, and the lower end of the filter inclined plate 7 is fixedly connected to the lower inner wall of the filter box 2. The filter inclined plate 7 is inclined from the upper end to the lower end towards the drain outlet 12, and the plate surface of the filter inclined plate 7 forms an acute angle with the horizontal direction. The drain outlet 12 is opened adjacent to the connection position between the lower end of the filter inclined plate 7 and the lower inner wall of the filter box 2, and collects the impurities intercepted by the filter inclined plate 7. The return port 13 is opened above the filter inclined plate 7, and the water entering through the return port 13 directly washes the plate surface of the filter inclined plate 7.

[0032] It can be understood that the filter inclined plate 7 is a single sheet of stainless steel perforated mesh or wedge wire welded screen plate, with densely distributed circular filter holes on the surface, the hole diameter being between 3mm and 8mm. The choice of stainless steel effectively resists corrosion caused by long-term water immersion and impurity erosion. The perforated mesh plate has a simple structure and is easy to form, while the wedge wire welded screen plate has higher strength and a more clogging V-shaped hole structure. The upper end of the filter inclined plate 7 is fixed to the transverse support plate on the inner wall of the top of the filter box 2 by welding or fasteners, and the lower end is connected to the support seat on the inner wall of the bottom in the same way, forming a stable inclined surface. The filter inclined plate 7 is installed at an acute angle, so that the plate surface forms a guide slope towards the drain outlet 12 while bearing the water flow pressure. For example, it is set at 30°-45°. When water flows upward through the plate surface from the first area 9, impurities are intercepted on the water-facing side and slide down the plate surface under the action of water flow thrust and their own gravity, eventually accumulating at the low point where the lower end of the filter inclined plate 7 meets the bottom wall of the box. The return port 13 is vertically positioned opposite the water-facing side of the inclined filter plate 7. Return water flows from above at a certain velocity onto the upper part of the plate, spreading and flushing downwards along the surface, effectively transporting the trapped impurities to the vicinity of the discharge port 12. This return flushing mechanism utilizes the circulating kinetic energy of substandard water to complete online cleaning of the filter plate without the need for additional flushing devices, reducing the frequency of manual disassembly and cleaning, and maintaining stable flux of the inclined filter plate 7 for a longer period.

[0033] Furthermore, such as Figure 4 As shown, both the drain outlet 12 and the return outlet 13 have a funnel-shaped structure. The larger end of the funnel-shaped drain outlet 12 is smoothly connected to the bottom inner wall of the filter box 2, and the smaller end of the funnel-shaped drain outlet 12 is connected to the drain pipe 18. The larger end of the funnel-shaped return outlet 13 is smoothly connected to the top inner wall of the filter box 2, and the smaller end of the funnel-shaped return outlet 13 is connected to the return pipe 15. The funnel-shaped structure ensures that there are no abrupt steps or dead angles between the drain outlet 12 and the bottom of the filter box 2. Impurities can smoothly enter the larger end of the drain outlet 12 as they slide along the bottom, without stagnating or accumulating at the interface. Similarly, the larger end of the funnel-shaped return outlet 13 smoothly transitions to the top inner wall of the box. After the return liquid enters the larger end from the smaller diameter pipe, the flow velocity decreases and the diffusion is uniform, allowing the return water to be evenly distributed and flush the surface of the filter inclined plate 7.

[0034] This utility model further proposes, such as Figure 2 and Figure 3 As shown, a one-way valve 28 is installed in series on the return pipe 15. The direction of the one-way valve 28 is from the return outlet of the three-way valve 14 to the return port 13 of the filter box 2, so as to prevent the water in the filter box 2 from flowing back into the return pipe 15.

[0035] The one-way valve 28 can be a spring-loaded one-way valve with the same nominal diameter as the return pipe 15. Both ends of the valve body are sealed to the return pipe 15 via pipe threads or flanges, and the valve is installed near the return port 13 of the filter box 2. When the three-way valve 14 switches to normal water supply and the return outlet is closed, the water pressure inside the filter box 2 may be higher than the static pressure inside the return pipe 15. At this time, the one-way valve 28 automatically closes, cutting off the reverse flow path from the filter box 2 to the return pipe 15, ensuring that substandard water does not bypass the water quality testing process and directly enter the return pipe or downstream network.

[0036] This utility model further proposes, such as Figure 1 and Figure 2 As shown, the sewage outlet 12 is sealed to the inlet end of the sewage pump 19 through the sewage pipe 18. The sewage pump 19 is fixedly installed below the filter box 2 and actively sucks up and discharges the impurities accumulated at the sewage outlet 12.

[0037] The sewage pump 19 is a small submersible sewage pump or a semi-open impeller impurity pump. Its inlet is connected to the funnel-shaped end of the sewage outlet 12 via a short rigid pipe and is secured with stainless steel clamps or flanges to form a detachable sealed connection. An AC contactor or relay controlled by the display control unit 20 is connected in series in the power supply circuit of the sewage pump 19. In actual operation, the sewage pump 19 can start according to a set time cycle, or it can be triggered by the display control unit 20 based on water quality detection data or differential pressure signals. For example, while the display control unit 20 issues a switching command to the three-way valve 14, it supplies power to the sewage pump 19 after a short delay, ensuring that the returning water fully flushes impurities into the funnel cavity of the sewage outlet 12 before starting suction, thus increasing the solids content of a single discharge. The display control unit 20 can also be set with independent time control logic, such as forcibly starting the sewage pump 19 to run for a preset time according to a set cycle to empty accumulated impurities. This active suction method is more reliable than relying solely on gravity discharge. Especially when the impurity concentration is high and the sediment is in the form of mud, the sewage pump 19 can provide sufficient suction to send the thick impurities out through the sewage pipe 18, and the sewage outlet 12 and the bottom of the first area 9 are less likely to become clogged.

[0038] Furthermore, such as Figure 1 , Figure 2 as well as Figure 6As shown, the water quality tester 16 also includes a display control unit 20, which is electrically connected to the sensing unit 17; the three-way valve 14 includes an electric actuator 21, which is electrically connected to the display control unit 20, and controls the three-way valve 14 to switch the water path when the water quality does not meet the standard.

[0039] The display control unit 20, based on an embedded industrial controller, integrates an LCD touchscreen and operation buttons on its panel. It can display parameters such as turbidity, suspended solids, residual chlorine, and total organic carbon in the third zone 11 in real time and supports historical data queries. The controller internally presets water quality qualification thresholds corresponding to the treatment capacity of each layer of the depth filter plate 8: turbidity not exceeding 1 NTU, suspended solids not exceeding 5 mg / L, residual chlorine not less than 0.05 mg / L, and total organic carbon not exceeding 2 mg / L. If any indicator exceeds the threshold, the water quality is deemed substandard. The weak signals collected by the sensor group 17 are sent to the signal conditioning and A / D conversion module within the display control unit 20 via a signal transmission line, where the microprocessor compares them with the thresholds. Once any indicator exceeds the limit, the relay output of the display control unit 20 immediately sends a switching command to the electric actuator 21. The electric actuator 21 is an electric rotary actuator. Upon receiving the command, its internal single-phase motor drives the valve core of the three-way valve 14 to rotate to the return position via a reduction gear set, simultaneously feeding back a position signal to the display control unit 20. This closed-loop control of detection, judgment, and execution is all completed automatically within the device.

[0040] As a specific implementation method, such as Figure 5 and Figure 6 As shown, a mounting frame 22 is fixedly installed in the third area 11; the sensing unit 17 includes multiple parallel and spaced sensing probes, which respectively detect four indicators: turbidity, suspended solids, residual chlorine, and total organic carbon, and is fixedly installed in the third area 11 by the mounting frame 22; the display control unit 20 is fixedly installed on the outer wall of the filter box 2; the sensing unit 17 and the display control unit 20 are connected by a connecting pipe 23, which is a sealed tube that passes through the side wall of the filter box 2; one end of the connecting pipe 23 is fixedly connected to the mounting frame 22, and the other end of the connecting pipe 23 is fixedly connected to the display control unit 20; a signal transmission line passes through the connecting pipe 23, and both ends of the signal transmission line are electrically connected to the sensing unit 17 and the display control unit 20, respectively.

[0041] Multiple parallel, spaced-apart induction probes can detect different water quality indicators such as turbidity, residual chlorine, and conductivity. Multiple probes of the same type can also be used for redundancy to improve detection reliability. The mounting frame 22 positions each probe in the main effluent flow area of ​​the third zone 11, ensuring that the induction probes are always immersed in the flowing water filtered by the depth filter plate 8, avoiding deviations in detection values ​​due to probe contact with stagnant water or air bubbles. The connecting pipe 23, penetrating the side wall of the filter box 2, uses a sealed welding or sealing ring compression structure to ensure the box's sealing performance under pressure.

[0042] Furthermore, such as Figure 3 and Figure 5 As shown, the inner wall of the filter box 2 is equipped with an upper limit block 24 and a lower limit block 25 corresponding to the installation position of the depth filter plate 8. The upper limit block 24 is fixed to the top inner wall of the filter box 2, and the lower limit block 25 is fixed to the bottom inner wall of the filter box 2. An installation groove adapted to the thickness of the depth filter plate 8 is formed between the upper limit block 24 and the lower limit block 25. The upper and lower edges of the depth filter plate 8 are respectively embedded in the installation groove to achieve vertical positioning and fixation of the depth filter plate 8. The upper limit block 24 and the lower limit block 25 can be made of stainless steel angle steel or bent plate and are fixed to the inner wall of the filter box 2 by welding. After the depth filter plate 8 is inserted into place from top to bottom along the installation groove, a small gap is maintained between its four edges and the groove wall to prevent water from short-circuiting through the edges without passing through the depth filter plate 8, thus ensuring filtration accuracy. When it is necessary to replace or clean the depth filter plate 8, the top cover 27 can be opened to pull the depth filter plate 8 upward, making maintenance and operation simple.

[0043] Furthermore, such as Figure 5 As shown, a maintenance opening 26 is provided on the top of the filter box 2 corresponding to the mounting slot. A removable cover plate 27 is sealed and installed at the maintenance opening 26, and the cover plate 27 is fastened to the filter box 2 by bolts. An upper limit block 24 is located below the maintenance opening 26, allowing the depth filter plate 8 to be installed into or removed from the mounting slot through the maintenance opening 26. A sealing gasket can be provided at the mating surface between the cover plate 27 and the maintenance opening 26. When the bolt assembly is tightened, the sealing gasket is compressed and deformed to fill the small unevenness of the contact surface, maintaining the overall pressure-bearing and sealing capacity of the filter box 2.

[0044] The overall working principle of this utility model is as follows: the raw water from the pipeline enters the crushing box 1 through the inlet 3. After the crushing mechanism 4 crushes large particles of impurities, it flows into the first area 9 of the filter box 2. The water passes through the filter inclined plate 7 from bottom to top. Most of the solid impurities are intercepted and slide down the inclined plate surface to the drain outlet 12. The water after preliminary filtration enters the second area 10, and then passes horizontally through the depth filter plate 8 for fine filtration before entering the third area 11. The sensing unit 17 monitors the water quality in the third zone 11 in real time. If the indicators meet the set requirements, the three-way valve 14 keeps the valve inlet connected to the downstream outlet, and the purified water is supplied to the downstream pipe network through the outlet 5. If the water quality is found to be substandard, the display control unit 20 drives the electric actuator 21 to switch the three-way valve 14, and the water is no longer supplied externally. Instead, it is injected into the second zone 10 through the return pipe 15 and the one-way valve 28 from the return port 13. The water flows from top to bottom, flushing the filter inclined plate 7 and pushing the impurities accumulated on the plate to the bottom of the first zone 9. At this time, the sewage pump 19 can be started simultaneously to force the impurities out through the sewage pipe 18. The returned water flows through the depth filter plate 8 again to participate in secondary purification, and the cycle continues until the water quality meets the standards, after which the water supply is restored.

[0045] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A municipal water supply network water quality monitoring intelligent sewage device, comprising a crushing box and a filtering box, the crushing box and the filtering box are integrally formed and internally communicated, one end of the crushing box is provided with a water inlet, a crushing mechanism is arranged in the crushing box, the filtering box is provided with a water outlet away from the water inlet, and a filtering mechanism is arranged in the filtering box, characterized in that: The filtration mechanism includes a filter inclined plate and a depth filter plate, which are arranged at intervals along the water flow direction, dividing the interior of the filter box into a first region, a second region, and a third region. The first region is connected to a crushing chamber. The filter inclined plate is inclinedly positioned between the first region and the second region, and the depth filter plate is vertically fixed between the second region and the third region. The bottom of the filter box has a drain outlet located in the first region. The top of the filter box has a return outlet located in the second region. The system also includes a three-way valve, a return pipe, and a water quality analyzer. The three-way valve has a valve inlet, a downstream outlet, and a return outlet. The valve inlet of the three-way valve is connected to the outlet of the filter box. One end of the return pipe is connected to the return outlet of the three-way valve, and the other end is connected to the return outlet at the top of the filter box. The sensing unit of the water quality analyzer extends through the outer wall of the filter box into the third region to monitor the water quality after filtration by the depth filter plate in real time. When the water quality tester detects that the water quality does not meet the standards, it controls the three-way valve to switch the water path, and the water flows back to the second area through the return pipe.

2. The intelligent sewage discharge device for municipal water supply network water quality monitoring according to claim 1, characterized in that, The upper end of the filter inclined plate is fixedly connected to the upper inner wall of the filter box, and the lower end of the filter inclined plate is fixedly connected to the lower inner wall of the filter box. The filter inclined plate is inclined from the upper end to the lower end towards the drain outlet, and the surface of the filter inclined plate forms an acute angle with the horizontal direction. The drain outlet is located adjacent to the connection position between the lower end of the filter inclined plate and the lower inner wall of the filter box, and collects the impurities intercepted by the filter inclined plate. The return port is located above the filter inclined plate, and the water entering through the return port directly washes the surface of the filter inclined plate.

3. The intelligent sewage discharge device for municipal water supply network water quality monitoring according to claim 2, characterized in that, Both the drain outlet and the return outlet have a funnel-shaped structure; the larger end of the funnel-shaped drain outlet is smoothly connected to the bottom inner wall of the filter box, and the smaller end of the funnel-shaped drain outlet is connected to the drain pipe; the larger end of the funnel-shaped return outlet is smoothly connected to the top inner wall of the filter box, and the smaller end of the funnel-shaped return outlet is connected to the return pipe.

4. The intelligent sewage discharge device for municipal water supply network water quality monitoring according to claim 3, characterized in that, A one-way valve is installed in series on the return pipe. The one-way valve is directed from the return outlet of the three-way valve to the return port of the filter box to prevent the water in the filter box from flowing back into the return pipe.

5. The intelligent sewage discharge device for municipal water supply network water quality monitoring according to claim 3, characterized in that, The sewage outlet is sealed to the inlet of the sewage pump through the sewage pipe. The sewage pump is fixedly installed below the filter box and actively sucks up and discharges the impurities accumulated at the sewage outlet.

6. The intelligent sewage discharge device for municipal water supply network water quality monitoring according to claim 1, characterized in that, The water quality analyzer also includes a display control unit, which is electrically connected to the sensing unit; the three-way valve includes an electric actuator, which is electrically connected to the display control unit, and controls the three-way valve to switch the water path when the water quality does not meet the standards.

7. The intelligent sewage discharge device for municipal water supply network water quality monitoring according to claim 6, characterized in that, A mounting frame is fixedly installed in the third area; the sensing unit includes multiple parallel and spaced sensing probes, which are fixedly installed in the third area via the mounting frame; the display control unit is fixedly installed on the outer wall of the filter box; the sensing unit and the display control unit are connected by a connecting pipe, which is a sealed tube passing through the side wall of the filter box; one end of the connecting pipe is fixedly connected to the mounting frame, and the other end is fixedly connected to the display control unit; a signal transmission line passes through the connecting pipe, and both ends of the signal transmission line are electrically connected to the sensing unit and the display control unit, respectively.

8. The intelligent sewage discharge device for municipal water supply network water quality monitoring according to claim 1, characterized in that, The inner wall of the filter box is provided with an upper limit block and a lower limit block respectively corresponding to the installation position of the depth filter plate; the upper limit block is fixed to the top inner wall of the filter box, and the lower limit block is fixed to the bottom inner wall of the filter box; an installation groove adapted to the thickness of the depth filter plate is formed between the upper limit block and the lower limit block, and the upper and lower edges of the depth filter plate are respectively embedded in the installation groove to realize the vertical limiting and fixing of the depth filter plate.

9. The intelligent sewage discharge device for municipal water supply network water quality monitoring according to claim 8, characterized in that, A maintenance opening is provided on the top of the filter box corresponding to the position of the mounting slot; a removable cover plate is sealed and installed at the maintenance opening, and the cover plate is fastened to the filter box by a bolt assembly; the upper limit block is located below the maintenance opening, and the depth filter plate can be installed into or removed from the mounting slot through the maintenance opening.

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