Building water supply tail end water cleaning device and system

Abstract

The invention provides a building water supply tail end water cleaning device and system, and relates to the technical field of building water supply and secondary water supply. The building water supply tail end water cleaning device comprises a raw water chamber, a water cleaning chamber and an inner container, the raw water chamber is connected with the water cleaning chamber, the inner container is arranged in the water cleaning chamber and communicated with the raw water chamber, the inner container is communicated with the water cleaning chamber through a fine particle filtering structure, and the fine particle filtering structure is arranged in the water cleaning chamber. The end, close to the clean water chamber, of the raw water chamber comprises a side tangential water inlet structure, a spiral flow deflector is arranged on the inner wall of the raw water chamber and spirals in the direction away from the clean water chamber, and a side water outlet of the clean water chamber is communicated with a water supply pipe network in a building.

Description

Technical Field

[0001] This invention relates to the field of building water supply and secondary water supply technology, and more specifically, to a building water supply terminal cleaning device and system. Background Technology

[0002] Water quality safety is a crucial baseline for evaluating a "good house." In actual operation, building water supply systems are generally subject to significant short-term water quality fluctuations due to factors such as corrosion of secondary water supply pipes and water stagnation. Existing buildings are prone to sudden water quality deterioration, such as "yellow water," "turbid water," and suspended impurities, during water outages for maintenance, pipeline renovations, or the initial period after water supply is restored from long-term vacancy. This seriously affects the user experience and poses health risks.

[0003] Existing technologies largely rely on simple filters at the entrance of residential communities, bypass flushing devices, or household water purification equipment at the user end. However, these methods have significant drawbacks: simple filters can only intercept coarse impurities and cannot effectively treat fine particulate matter and dissolved contaminants. Furthermore, they are difficult to cover critical areas such as internal building risers and elevated water tanks, resulting in unsystematic and inconsistent water purification effects. Household water purification equipment is limited to single-point applications and cannot guarantee consistent water quality throughout the entire building. In addition, conventional filtration equipment is difficult to install in confined spaces such as pump rooms and water tank rooms, and suffers from technical defects such as easy filter clogging, high backwash water consumption, high maintenance costs, and the inability to efficiently self-clean without interrupting water supply. Summary of the Invention

[0004] The problem solved by this invention is: how to achieve efficient filtration of fine particulate impurities without interrupting water supply, reduce the risk of clogging, and thus improve the stability of water quality at the end of building water supply.

[0005] To address the aforementioned problems, this invention provides a water purification device for the terminal of a building water supply system, comprising a raw water chamber, a clean water chamber, and an inner tank. The raw water chamber is connected to the clean water chamber, and the inner tank is placed inside the clean water chamber and communicates with the raw water chamber. The inner tank is connected to the clean water chamber through a fine particle filtration structure. The end of the raw water chamber near the clean water chamber includes a lateral tangential water inlet structure. A spiral guide vane is provided on the inner wall of the raw water chamber, and the spiral guide vane spirals in a direction away from the clean water chamber. The side outlet of the clean water chamber is connected to the building's internal water supply network.

[0006] Optionally, the fine particle filtration structure includes a microporous membrane layer and a cylindrical support filter screen, the microporous membrane layer covering the outside of the cylindrical support filter screen, and the fine particle filtration structure being configured as the sidewall of the inner liner.

[0007] Optionally, the raw water chamber includes a sedimentation chamber located below the spiral guide vane, and the sedimentation chamber includes an electrically operated sludge discharge valve connected to an external sewage pipe.

[0008] Optionally, the edges of the spiral guide vane are chamfered.

[0009] Optionally, the ratio of the height of the spiral guide vane to the height of the raw water chamber is in the range of 1 / 2 to 1 / 3.

[0010] Optionally, the building water supply terminal cleaning device further includes a self-cleaning component. The self-cleaning component includes a rotating shaft rotatably connected to the inner tank, a suction perforated pipe connected to the rotating shaft and located inside the inner tank, a solenoid valve, a differential pressure transmitter, and a controller. The differential pressure transmitter is used to detect the pressure difference between the lateral tangential water inlet structure and the side outlet, and is communicatively connected to the controller. The suction perforated pipe is connected to an external sewage pipe. The solenoid valve is used to control the opening and closing of the suction perforated pipe and the external sewage pipe. The controller is communicatively connected to the solenoid valve. The rotating shaft is used to drive the suction perforated pipe to rotate around the circumference of the inner tank.

[0011] Optionally, the controller includes a fault alarm module, which outputs corresponding audible and visual alarms or remote communication alarm signals when abnormal pressure difference, sewage discharge failure, or actuator failure is detected.

[0012] Optionally, the controller is also communicatively connected to the secondary water supply monitoring platform. The data sent by the controller to the secondary water supply monitoring platform includes differential pressure signals, the opening and closing status of the solenoid valve and the electric sludge discharge valve, the number of sewage discharges, the duration of each sewage discharge, and equipment fault alarm information.

[0013] Optionally, the controller is set to a preset time interval, and when the differential pressure is lower than a threshold and reaches the preset time interval, sewage discharge is triggered.

[0014] Compared with related technologies, the water purification device at the end of the building water supply system of the present invention connects the raw water chamber and the clean water chamber, with the inner tank placed inside the clean water chamber and communicating with the raw water chamber. The raw water chamber and the clean water chamber form a stable support structure to ensure the stability of the inner tank in the clean water chamber. The raw water chamber includes a lateral tangential water inlet structure at the end near the clean water chamber, so that the raw water forms a wall-adhering vortex upon entering the raw water chamber. This wall-adhering vortex causes suspended impurities with higher density or larger particle size to accumulate on the cylinder wall and enter the spiral guide vane with the outer vortex. Under the guidance of the spiral guide vane, a spiral vortex flow is formed, causing large suspended impurities to be trapped in the vortex. Under the influence of gravity, the water settles and collects at the bottom of the raw water chamber, forming a preliminary centrifugal separation filtration. At the same time, the water forms a low-pressure reflux zone in the center of the vortex and forms an internal vortex that flows upward along the axis of the inner tank and back into the inner tank. Then, through the inner tank and the fine particle filtration structure, it connects with the clean water chamber, which can further filter the raw water. In this way, not only is the frequency of equipment replacement or cleaning of filter cartridges significantly reduced, maintenance costs and water loss are reduced, but clean water can also be continuously provided to deal with the water quality fluctuation problem at the end of the building water supply. Especially when water supply is restored after water outage maintenance or vacancy, it can quickly stabilize water quality and ensure water safety.

[0015] In another aspect, the present invention provides a water supply network circulation system, including the building water supply terminal cleaning device as described above.

[0016] The water supply network circulation system has all the beneficial effects of the water purification device at the end of the building's water supply, which will not be elaborated here. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the building water supply terminal cleaning device in an embodiment of the present invention; Figure 2 This is a schematic diagram of the building water supply terminal cleaning device applied to the side flow circulation system of the building water supply pump room in an embodiment of the present invention; Figure 3 This is a schematic diagram of a building water supply terminal cleaning device applied to a high-level water tank circulation system in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1-Raw water chamber; 11-Side tangential water inlet structure; 12-Spiral guide vane; 13-Sedimentation chamber; 131-Electric sludge discharge valve; 2-Clean water chamber; 21-Side outlet; 3-Fine particle filtration structure; 31-Microporous membrane layer; 32-Cylindrical support filter screen; 4-Self-cleaning component; 41-Rotating shaft; 42-Suction perforated pipe; 43-Solenoid valve; 44-Differential pressure transmitter; 45-Controller. Detailed Implementation

[0019] 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.

[0020] In the accompanying drawings, the X-axis represents left and right positions, with the positive direction of the X-axis representing the right side and the negative direction representing the left side; the Z-axis represents up and down positions, with the positive direction of the Z-axis representing the top and the negative direction representing the bottom. It should be noted that the aforementioned representations of the X and Z axes are merely for the convenience of describing the invention and for 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, and therefore should not be construed as limiting the invention.

[0021] It should be noted that the terms "first," "second," etc., used in the specification and claims of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0022] Combination Figure 1 As shown, this embodiment of the invention provides a water purification device for the terminal of a building water supply system, including a raw water chamber 1, a clean water chamber 2, and an inner tank. The raw water chamber 1 is connected to the clean water chamber 2. The inner tank is placed inside the clean water chamber 2 and communicates with the raw water chamber 1. The inner tank is connected to the clean water chamber 2 through a fine particle filter structure 3. The end of the raw water chamber 1 near the clean water chamber 2 includes a lateral tangential water inlet structure 11. The inner wall of the raw water chamber 1 is provided with a spiral guide vane 12, which spirals away from the clean water chamber. The side outlet 21 of the clean water chamber 2 is connected to the building's internal water supply network.

[0023] Specifically, the raw water chamber 1 is located above the clean water chamber 2, and the raw water chamber 1 and clean water chamber 2 are coaxial. For example, the raw water chamber 1 and clean water chamber 2 can be coaxially connected cylinders. Inside the clean water chamber 2, the inner tank is fixed inside the clean water chamber 2. The inner tank is connected to the raw water chamber 1 through a central pipe located on the axis of the raw water chamber 1, and the inner tank is also connected to the clean water chamber 2 through a fine particle filter structure 3, so that the raw water becomes clean water after being filtered by the fine particle filter structure 3. The fine particle filter structure 3 can take various forms, for example, it can be a cylindrical filter screen made of stainless steel wire mesh or polymer fiber mesh, and its pore size is set to intercept fine suspended particles in the water.

[0024] A tangential water inlet structure 11 is provided at the end of the raw water chamber 1 near the clean water chamber 2, i.e., at the top of the raw water chamber 1. The tangential water inlet structure 11 can be one or more water inlets extending along the tangential direction of the bottom side wall of the raw water chamber 1. For example, the water inlet can be designed as rectangular or circular, and its inlet direction forms a tangential angle with the inner wall of the raw water chamber 1, so that a rotational force is generated when the water flows in.

[0025] The spiral guide vane 12 can be made of metal or plastic sheet and fixed to the inner wall of the bottom of the raw water chamber 1 by welding, riveting or integral molding. For example, the guide vane 12 can be a continuous spiral blade that extends downward from the bottom of the raw water chamber 1 to form a spiral channel that guides the water flow downward.

[0026] Raw water enters the raw water chamber 1 through the lateral tangential inlet structure 11, forming a wall-attached rotating flow. Under centrifugal force, suspended impurities with higher density or larger particle size accumulate towards the cylinder wall and enter the spiral guide vane 12 with the outer swirling flow. Guided by the spiral guide vane 12, a spiral vortex flow is formed, causing large suspended impurities to settle and collect at the bottom of the raw water chamber 1, forming preliminary filtration. As the outer swirling flow moves downward, under the action of centrifugal force, the fluid accumulates towards the outer cylinder wall and generates a radial pressure gradient, forming a relatively low-pressure backflow zone in the axial region. When the outer swirling flow is obstructed at the bottom of the raw water chamber 1, the fluid converges towards the central axis and, induced by the relatively low-pressure zone and driven by the axial pressure difference, deflects upward to form an inner swirling flow rotating in the same direction as the outer swirling flow. The side outlet 21 is located at a relatively low pressure downstream of the flow field. Driven by the pressure difference, the internal swirling flow flows upward along the axis of the inner tank and enters the inner tank. Then, the raw water enters the clean water chamber 2 after further filtration by the fine particle filter structure 3, and flows into the building's internal water supply network through the side outlet 21 of the clean water chamber 2. The side outlet 21 can be one or more outlet pipes installed on the side wall of the clean water chamber 2, which are connected to the building's internal water supply system through pipes. For example, the outlet 21 can be a pipe with a flange or threaded interface for easy connection to the external pipe network.

[0027] Therefore, in this embodiment, the raw water chamber 1 is connected to the clean water chamber 2, and the inner tank is placed inside the clean water chamber 2 and communicates with the raw water chamber 1. The raw water chamber 1 and the clean water chamber 2 form a stable support structure to ensure the stability of the inner tank in the clean water chamber 2. The raw water chamber 1 includes a lateral tangential water inlet structure 11 at the end near the clean water chamber 2, so that the raw water forms a wall-adhering vortex when entering the raw water chamber 1. The wall-adhering vortex causes suspended impurities with higher density or larger particle size to accumulate towards the cylinder wall. They then enter the spiral guide vane 12 with the outer vortex and form a spiral vortex flow under the guidance of the spiral guide vane 12, causing large suspended impurities to be affected by the vortex. The water settles and collects at the bottom of the raw water chamber 1, forming a preliminary centrifugal separation filter. At the same time, the water forms a low-pressure reflux zone in the center of the vortex and forms an internal vortex that flows back upward along the axis of the inner tank and enters the inner tank. Then, it passes through the inner tank and connects to the clean water chamber 2 through the fine particle filter structure 3, which can further filter the raw water. In this way, not only is the frequency of equipment replacement or cleaning of filter elements significantly reduced, maintenance costs and water loss reduced, but clean water can also be continuously provided to deal with the water quality fluctuation problem at the end of the building water supply. Especially when the water supply is restored after water outage maintenance or vacancy, the water quality can be quickly stabilized to ensure water safety.

[0028] Optionally, combined Figure 1 As shown, the fine particle filtration structure 3 includes a microporous membrane layer 31 and a cylindrical support filter 32. The microporous membrane layer 31 covers the outside of the cylindrical support filter 32, and the fine particle filtration structure 3 is configured as the sidewall of the inner liner.

[0029] Specifically, the circumferential sidewall of the inner liner is the cylindrical support filter 32, which is fitted onto the microporous membrane layer 31. Exemplarily, the microporous membrane layer 31 can be made of various materials and structures. For example, it can be a hollow fiber membrane or flat sheet membrane made of polymer materials such as polyvinylidene fluoride (PVDF), polyethersulfone (PES), or polypropylene (PP), which have good chemical stability and filtration performance; or, a membrane made of ceramic materials can be used to provide higher pressure resistance and corrosion resistance. The cylindrical support filter 32 can be implemented in various ways. For example, it can be made of stainless steel woven mesh or sintered mesh, which have excellent strength and corrosion resistance; or, it can be a porous cylinder made of high-strength engineering plastics (such as ABS, PP, PVC) through injection molding to achieve lightweighting and cost optimization.

[0030] Thus, with the microporous membrane layer 31 covering the outside of the cylindrical support filter screen 32, and the fine particle filtration structure 3 configured as the sidewall of the inner tank, the microporous membrane layer 31 is responsible for the fine filtration of small particles in the water, ensuring that the effluent water quality meets high standards. The cylindrical support filter screen 32 provides robust mechanical support for the microporous membrane layer 31, effectively resisting the risk of deformation or damage caused by water flow impact and pressure difference changes. This enhances the overall stability and durability of the filtration assembly, reduces clogging and damage to the microporous membrane layer 31 due to uneven stress or excessive deformation, and significantly reduces maintenance frequency and replacement costs. Simultaneously, under the swirling effect generated by the lateral tangential water inlet structure 11 and the spiral guide vanes 12 in the raw water chamber 1, the water flow continuously washes the surface of the microporous membrane layer 31. Combined with the stable support of the cylindrical support filter screen 32, this further reduces the deposition and scaling of impurities on the membrane surface, maintaining efficient and stable filtration performance, and ensuring the long-term reliable operation and continuous stable clean water output of the water purification device.

[0031] Optionally, combined Figure 1 As shown, the raw water chamber 1 includes a sedimentation chamber 13 located below the spiral guide vane 12, and the sedimentation chamber 13 includes an electric sludge discharge valve 131 connected to an external sewage discharge pipe.

[0032] Specifically, the sedimentation chamber 13 can be constructed as a conical or bowl-shaped recessed structure at the bottom of the raw water chamber 1. The volume of the sedimentation chamber 13 can be optimized according to the expected amount of sediment generated and the frequency of sludge discharge to ensure that all sediment can be effectively contained between two sludge discharge cycles. An electrically operated sludge discharge valve 131 connected to the sludge discharge pipe is installed at the lowest position of the sedimentation chamber 13.

[0033] Thus, by setting a sedimentation chamber 13 below the spiral guide vane 12, gravity can be effectively utilized to accelerate the settling of denser suspended particles and sediments in the raw water under the action of water vortex and concentrate them in the sedimentation chamber 13, thereby preventing these impurities from directly impacting or clogging the fine particle filter structure 3. This reduces the load on the fine particle filter structure 3, extends its service life, and maintains stable filtration efficiency. Simultaneously, the electric sludge discharge valve 131 equipped in the sedimentation chamber 13 enables automated discharge of sediments, allowing for periodic or on-demand removal of sediments without manual intervention. This automatic sludge discharge mechanism not only significantly reduces the frequency and intensity of manual maintenance and lowers operating costs, but also ensures the continuous and efficient operation of the device, avoiding problems such as increased filtration resistance and decreased self-cleaning effect caused by sediment accumulation. This improves the reliability, automation level, and long-term operational stability of the building water supply terminal cleaning device.

[0034] Optionally, combined Figure 1 As shown, the edges of the spiral guide vane 12 are chamfered.

[0035] Specifically, the chamfering of the edge of the spiral guide vane 12 refers to cutting, grinding, or shaping the edge of the spiral guide vane 12 to transition from an acute angle to an obtuse angle or a rounded shape. For example, after the spiral guide vane 12 is formed, its edge is trimmed by machining (such as milling or grinding) to form a chamfer with a specific angle or radius. Alternatively, the chamfering effect can be achieved by coating or covering the edge of the spiral guide vane 12 with a material of a certain thickness and flexibility, making the edge present a smooth transition.

[0036] Thus, in the water purification device at the end of the building's water supply system, when raw water enters the raw water chamber 1 through the lateral tangential inlet structure 11 and swirls downwards along the spiral guide vane 12, the chamfered design of the spiral guide vane 12's edge allows the water to flow more smoothly, effectively reducing energy loss and local eddies caused by the water impacting the sharp edges. This not only reduces water flow resistance and turbulence generation, but also optimizes the swirling effect within the raw water chamber 1. Simultaneously, the chamfered design effectively prevents long-term scouring and wear of the sharp edges by the water flow, extending the service life of the spiral guide vane 12 and reducing the risk of secondary pollution of water quality by particles generated from wear, thereby improving the long-term stability and water purification effect of the device.

[0037] Optionally, combined Figure 1 As shown, the ratio of the height of the spiral guide vane 12 to the height of the raw water chamber 1 ranges from 1 / 2 to 1 / 3.

[0038] Specifically, if the height of the clean water chamber 2 is H, the height of the spiral guide vane 12 can be designed to be between H / 2 and H / 3. Specifically, the spiral guide vane 12 is arranged at a height of 1 / 3 of the height of the original water chamber 1. The spiral guide vane 12 has a smaller pitch in the upper region to enhance the swirling effect, and a larger pitch in the lower region to reduce flow resistance and allow the water flow to develop naturally. After the water flow leaves the guide vane, it continues to rotate and rise by inertia and enters the inner tank.

[0039] In this way, by limiting the ratio of the height of the spiral guide vane 12 to the height of the clean water chamber 2 to within the range of 1 / 2 to 1 / 3, it is ensured that the water flow introduced by the side-tangential water inlet structure 11 can form a stable and uniform vortex under the guidance of the spiral guide vane 12, avoiding water flow short circuits or dead angles, thereby significantly improving the efficiency of particulate matter migration to the fine particle filter structure 3, and thus improving the filtration effect.

[0040] Optionally, combined Figure 1 As shown, the building water supply terminal cleaning device also includes a self-cleaning component 4. The self-cleaning component 4 includes a rotating shaft 41 rotatably connected to the inner tank, a suction perforated pipe 42 connected to the rotating shaft 41 and located in the inner tank, a solenoid valve 43, a differential pressure transmitter 44, and a controller 45. The differential pressure transmitter 44 is used to detect the pressure difference between the lateral tangential water inlet structure 11 and the side outlet 21, and is communicatively connected to the controller 45. The suction perforated pipe 42 is connected to the external sewage pipe. The solenoid valve 43 is used to control the opening and closing of the suction perforated pipe 42 and the external sewage pipe. The controller 45 is communicatively connected to the solenoid valve 43. The rotating shaft 41 is used to drive the suction perforated pipe 42 to rotate around the circumference of the inner tank.

[0041] Specifically, the rotating shaft 41 is rotatably mounted on the top of the clean water chamber 2. The rotation of the shaft 41 provides rotational power. The shaft 41 can be driven by a small motor (e.g., a stepper motor, DC geared motor) through gears, belts, or direct couplings to achieve precise speed and position control. The suction perforated tube 42 is provided with multiple tiny holes or slits and is positioned inside the fine particle filter structure 3 (i.e., inside the inner liner). When it rotates under the drive of the rotating shaft 41, a local negative pressure suction effect is formed on the surface of the filter structure 3 through these holes or slits, peeling off and discharging the filter cake or impurities attached to the filter membrane.

[0042] Solenoid valve 43 is used to precisely control the opening and closing of the sewage discharge channel. It is mounted on the top of the raw water chamber 1 and is communicatively connected to the controller 45, meaning that solenoid valve 43 can open and close under the control of the controller 45. When the controller 45 issues a cleaning command, solenoid valve 43 responds quickly, opening the sewage discharge port to allow the sucked-up waste to be smoothly discharged from the device. This solenoid valve 43 can be a normally closed two-way solenoid valve, opening when energized. Differential pressure transmitter 44 is used to detect the pressure difference between the tangential inlet structure 11 and the side outlet 21 in real time. When the fine particle filter structure 3 becomes clogged, this pressure difference will increase significantly. The differential pressure transmitter 44 converts this pressure signal into an electrical signal and transmits it to the controller 45. The differential pressure transmitter 44 can use a high-precision differential pressure sensor, such as a silicon piezoresistive or capacitive differential pressure sensor, to ensure the accuracy and stability of the measurement results. The controller 45 is the intelligent core of the self-cleaning assembly 4. It is responsible for receiving signals from the differential pressure transmitter 44 and controlling the drive devices of the solenoid valve 43 and the rotating shaft 41 according to preset logic or algorithms. The controller 45 can be a microcontroller unit (MCU), such as an embedded processor based on the ARM architecture, or a programmable logic controller (PLC). It integrates functions such as data processing, logic judgment, and output control, and can realize automated decision-making and execution.

[0043] Thus, the differential pressure transmitter 44 continuously monitors the pressure difference between the tangential inlet structure 11 and the side outlet 21. When the fine particle filter structure 3 gradually becomes clogged due to impurities, causing the pressure difference to reach a preset threshold, the differential pressure transmitter 44 sends this signal to the controller 45. Upon receiving the clogging signal, the controller 45 initiates a self-cleaning program, instructing the shaft 41 to drive the suction perforated pipe 42 to rotate around the outside of the fine particle filter structure 3, while simultaneously controlling the solenoid valve 43 to open the sewage discharge channel. During the rotation of the suction perforated pipe 42, the micropores or slits on it generate a local negative pressure suction effect on the surface of the fine particle filter structure 3, peeling off the dirt attached to the filter membrane and discharging it with the sewage flow through the opened solenoid valve 43. This effectively solves the problem of easy clogging of the fine particle filter structure 3 and the need for frequent manual cleaning, significantly reducing maintenance costs and the need for manual intervention, ensuring the long-term stable operation of the device and the continuous cleanliness of the effluent, and improving the automation level and operating efficiency of the system.

[0044] Optionally, the controller 45 includes a fault alarm module that outputs corresponding audible and visual alarms or remote communication alarm signals when abnormal pressure difference, sewage discharge failure, or actuator failure is detected.

[0045] Specifically, the fault alarm module included in the controller 45 is a functional unit inside or integrated with the controller 45, specifically responsible for monitoring the system's operating status, identifying abnormal situations, and triggering a preset alarm mechanism when an abnormality occurs. This module can be an independent hardware circuit integrated on the mainboard of the controller 45, receiving status data through a specific sensor interface and driving alarm output.

[0046] For example, when the differential pressure transmitter 44 detects an abnormal differential pressure, indicating that the fine particle filter structure 3 may be clogged, the fault alarm module will immediately issue an alarm. If the electric sludge discharge valve 131 fails to open or close properly during the cleaning cycle, resulting in sludge discharge failure, the system can also detect and report it in a timely manner. Similarly, any malfunction of the shaft 41 or the solenoid valve 43 will also be quickly identified. This proactive fault detection and notification system ensures the continuous effectiveness of the self-cleaning function, avoids long-term water quality damage due to undetected system malfunctions, thereby protecting the water quality safety of the building's internal water supply network and helping to reduce operating costs through preventative maintenance.

[0047] Thus, by equipping the controller 45 with a fault alarm module, key operating parameters such as differential pressure, sewage discharge process status, and operational feedback from each actuator can be continuously monitored. When any parameter deviates from the preset normal range or expected behavior, the fault alarm module will immediately identify it as a fault condition and trigger an alarm. The immediate audible and visual alarms provide on-site personnel with immediate notification, while remote communication alarm signals ensure that even off-site personnel can obtain information in a timely manner, thereby enabling rapid intervention and maintenance. This significantly improves the reliability and operational safety of the entire self-cleaning process.

[0048] Optionally, the controller 45 is also connected to the secondary water supply monitoring platform. The data sent by the controller 45 to the secondary water supply monitoring platform includes differential pressure signal, opening and closing status of solenoid valve 43 and electric sludge discharge valve 131, number of sewage discharges, duration of each sewage discharge, and equipment fault alarm information.

[0049] Specifically, the communication connection between the controller 45 and the secondary water supply monitoring platform can be achieved wirelessly. Specifically, the differential pressure signal can be directly acquired by the differential pressure transmitter 44 and transmitted to the controller 45. The controller 45 then sends the raw or processed (e.g., filtered, normalized) differential pressure data to the secondary water supply monitoring platform. This allows the monitoring platform to monitor the operating status of the filter structure in real time, providing a basis for determining whether self-cleaning or filter element replacement is necessary.

[0050] Specifically, the controller 45 can obtain the opening and closing status of the solenoid valve 43 and the electric sludge discharge valve 131 by detecting the level status of its control output port, and then package and send this status information to the monitoring platform. Alternatively, the solenoid valve 43 and the electric sludge discharge valve 131 can integrate status feedback sensors (such as limit switches) to send their actual opening and closing status signals back to the controller 45, which then forwards this feedback information to the monitoring platform. This enables remote monitoring of the actual execution of self-cleaning and sludge discharge actions, ensuring that the equipment operates normally according to the preset logic.

[0051] Specifically, the controller 45 can be equipped with a counter. Each time the electric sludge discharge valve 131 is instructed to open and perform a sludge discharge operation, the counter automatically increments by one, and the accumulated sludge discharge count data is sent to the monitoring platform. Alternatively, the controller 45 can record each sludge discharge instruction sent and use this as the statistical basis for the number of sludge discharges. This allows for the assessment of equipment operating load and sludge discharge frequency, providing data support for maintenance planning and system optimization.

[0052] Specifically, the controller 45 can obtain the duration of a single sewage discharge by recording the opening and closing timestamps of the electric sludge discharge valve 131 and calculating the time difference between them, and then send this data to the monitoring platform. Alternatively, the controller 45 can utilize its internal timer function to start timing at the beginning of sewage discharge and stop timing at the end of sewage discharge, thereby accurately measuring the duration of sewage discharge. This allows for the evaluation of sewage discharge effectiveness and water resource consumption, and provides refined data for adjusting sewage discharge strategies.

[0053] Specifically, the controller 45 can generate corresponding fault alarm information and immediately send it to the monitoring platform when it detects abnormal differential pressure signals for extended periods, unresponsive actuators (such as shaft 41, solenoid valve 43, and electric sludge discharge valve 131), or communication interruptions, based on preset diagnostic logic. Alternatively, other integrated sensors in the device (such as power module fault sensors and pump operation status sensors) can detect abnormalities and send fault signals to the controller 45, which then integrates and forwards this information. This enables the monitoring platform to promptly detect and locate equipment faults, thereby quickly initiating emergency response and maintenance procedures and reducing system downtime.

[0054] Thus, the controller 45 also communicates with the secondary water supply monitoring platform. The data sent by the controller 45 to the monitoring platform includes differential pressure signals, the opening and closing status of the controlled solenoid valve 43 and the electric sludge discharge valve 131, the number of sludge discharges, the duration of each sludge discharge, and equipment fault alarm information. The transmission of the differential pressure signal allows the monitoring platform to dynamically assess the degree of clogging of the fine particle filter structure 3, thereby guiding maintenance personnel to remotely determine whether self-cleaning needs to be initiated or the filter element replaced, avoiding the tediousness and delays of on-site inspections. The real-time uploading of the opening and closing status of the controlled solenoid valve 43 and the electric sludge discharge valve 131 ensures the transparency of cleaning and sludge discharge actions, allowing maintenance personnel to remotely confirm whether each operation is executed as planned and to promptly detect and correct any abnormalities. The recording and transmission of the number of sludge discharges and the duration of each sludge discharge provide the monitoring platform with valuable historical operating data, which helps to analyze the equipment's operating load, optimize the frequency and duration of sludge discharges, thereby maximizing water conservation and reducing operating costs while ensuring water quality. Furthermore, the timely transmission of equipment fault alarm information enables the monitoring platform to receive abnormal alerts immediately, thereby quickly locating the fault point and guiding maintenance personnel to perform precise troubleshooting. This significantly shortens fault response time and improves the operational reliability and continuity of the equipment. In this way, the device is upgraded from an independent operating unit to a smart IoT node, greatly enhancing the intelligent management level and operational efficiency of the equipment, and ensuring the continuous stability and safety of the water quality within the building.

[0055] Optionally, the controller 45 is set to a preset time interval, and when the differential pressure is lower than the threshold and the preset time interval is reached, sewage discharge is triggered.

[0056] Specifically, the preset time interval set by controller 45 refers to the period of time the system needs to wait before performing subsequent operations (e.g., triggering sewage discharge) after a specific condition is met (e.g., the pressure difference between the tangential inlet structure 11 and the side outlet 21 detected by differential pressure transmitter 44 is lower than a preset threshold). This preset time interval is configurable and is designed to introduce a time buffer to avoid immediate responses to instantaneous or brief changes in conditions. For example, the memory inside controller 45 can pre-store a fixed time value as the preset time interval, which can be set at the factory or configured and modified by maintenance personnel on-site through a human-machine interface (such as a touch screen or buttons).

[0057] The controller 45 continuously monitors the differential pressure value detected by the differential pressure transmitter 44. When the differential pressure value first falls below a preset threshold, the controller 45 starts an internal timer. If the differential pressure value recovers above the threshold before the timer reaches a preset time interval, the timer is reset; if the differential pressure value remains below the threshold until the timer reaches the preset time interval, the controller 45 issues a command to trigger sewage discharge, such as controlling the solenoid valve 43 and the electric sludge discharge valve 131.

[0058] Thus, by setting a preset time interval through the controller 45, when the pressure difference is lower than the threshold and the preset time interval is reached, sewage discharge is triggered. The controller 45 can continuously judge the state where the pressure difference is lower than the threshold, avoiding misjudgments and unnecessary sewage discharge operations caused by instantaneous water pressure fluctuations or transient sensor errors. This ensures the necessity and effectiveness of sewage discharge operations, that is, sewage discharge is only performed when the system is indeed in a stable low pressure difference state (which may mean that the water quality is good but periodic maintenance sewage discharge is required, or the system load is low). This helps to extend the service life of actuators such as the electric mud discharge valve 131 and the solenoid valve 43 in the self-cleaning component 4, reduce energy consumption, and reduce maintenance costs.

[0059] Another embodiment of the present invention provides a water supply network circulation system, including the building water supply terminal cleaning device as described above.

[0060] Specifically, such as Figure 2 As shown, the water purification device at the end of the building water supply system in this embodiment is applied to the side-flow circulation system of the building water supply pump room. The system includes an underground water tank B, a municipal water inlet pipe A, a secondary water supply pump set C, a main outlet pipe D, and a bypass pipe. Valves and the water purification device E of this embodiment are installed on the bypass pipe. The bypass inlet is led out from the main outlet pipe D of the secondary water supply pump set C, and the bypass outlet is connected back to the downstream of the main outlet pipe D or the underground water tank B, realizing side-flow circulation purification of the water supplied to the pump room. The inlet and outlet of the water purification device E are connected to the bypass pipe, and its drain pipe is connected to the pump room drainage system. During operation, the bypass valve is adjusted to maintain the bypass flow rate at 5-15% of the designed water supply. The raw water undergoes solid-liquid separation and filter self-cleaning through the water purification device E. The self-cleaning cycle can be set according to the raw water turbidity, the pressure difference across the filter, and the operating time. The pump room side-flow circulation system can effectively reduce the turbidity of the pump room effluent and improve the stability of the secondary water supply quality.

[0061] Optionally, an online turbidity meter can be installed on the main outlet pipe D to upload real-time turbidity data of the pump house outlet water to the secondary water supply monitoring platform, thereby realizing online early warning of water quality monitoring and optimizing the operating parameters of the water purification device and the pump house side flow system.

[0062] Or, such as Figure 3 As shown, the water purification device at the end of the building water supply system in this embodiment of the invention is applied to the circulation system of the elevated water tank F. The system includes a municipal water inlet pipe A, a secondary water supply pump set C, an elevated water tank F, a main outlet pipe D, and a bypass pipe. A valve and the water purification device E described in this invention are installed on the bypass pipe. The bypass inlet is led out from the bottom of the water tank, and the bypass outlet is connected back to the user's main pipe or the elevated water tank F. The inlet and outlet of the water purification device E are connected to the bypass pipe, and its drain pipe is connected to the drainage system. A small circulating water pump can be installed when the water pressure at the water tank outlet is insufficient.

[0063] Thus, by constructing a water supply network circulation system and integrating building water supply terminal cleaning devices, these devices perform efficient filtration and self-cleaning at each terminal point, ensuring the quality of water used by users. This solves the problem of traditional solutions where devices only treat individual building terminals and lack overall integration of the entire water supply network circulation system, avoiding the drawbacks of low overall network water quality restoration efficiency, water waste, and high maintenance costs. Through the synergistic effect of continuous circulation and terminal fine filtration, the water supply network's cleaning efficiency and system stability are significantly improved, providing users with a continuous and stable supply of high-quality water.

[0064] 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 purification device at the end of a building water supply system, characterized in that, It includes a raw water chamber (1), a clean water chamber (2), and an inner tank. The raw water chamber (1) is connected to the clean water chamber (2). The inner tank is placed inside the clean water chamber (2) and communicates with the raw water chamber (1). The inner tank is connected to the clean water chamber (2) through a fine particle filter structure (3). The end of the raw water chamber (1) near the clean water chamber (2) includes a lateral tangential water inlet structure (11). The inner wall of the raw water chamber (1) is provided with a spiral guide vane (12). The spiral guide vane (12) rotates in a direction away from the clean water chamber. The side outlet (21) of the clean water chamber (2) is connected to the water supply network inside the building.

2. The building water supply terminal cleaning device according to claim 1, characterized in that, The fine particle filtration structure (3) includes a microporous membrane layer (31) and a cylindrical support filter (32), the microporous membrane layer (31) covering the outside of the cylindrical support filter (32), and the fine particle filtration structure (3) being configured as the sidewall of the inner liner.

3. The building water supply terminal cleaning device according to claim 1, characterized in that, The raw water chamber (1) includes a sedimentation chamber (13) located below the spiral guide vane (12), and the sedimentation chamber (13) includes an electric sludge discharge valve (131) connected to an external sewage discharge pipe.

4. The building water supply terminal cleaning device according to claim 1, characterized in that, The edges of the spiral guide vane (12) are chamfered.

5. The building water supply terminal cleaning device according to claim 1, characterized in that, The ratio of the height of the spiral guide vane (12) to the height of the raw water chamber (1) is in the range of 1 / 2 to 1 / 3.

6. The building water supply terminal cleaning device according to claim 3, characterized in that, It also includes a self-cleaning assembly (4), which includes a rotating shaft (41) rotatably connected to the inner tank, a suction perforated pipe (42) connected to the rotating shaft (41) and located in the inner tank, a solenoid valve (43), a differential pressure transmitter (44), and a controller (45). The differential pressure transmitter (44) is used to detect the pressure difference between the side tangential water inlet structure (11) and the side outlet (21), and is communicatively connected to the controller (45). The suction perforated pipe (42) is connected to the external sewage pipe. The solenoid valve (43) is used to control the opening and closing of the suction perforated pipe (42) and the external sewage pipe. The controller (45) is communicatively connected to the solenoid valve (43). The rotating shaft (41) is used to drive the suction perforated pipe (42) to rotate around the circumference of the inner tank.

7. The building water supply terminal cleaning device according to claim 6, characterized in that, The controller (45) includes a fault alarm module, which outputs corresponding audible and visual alarms or remote communication alarm signals when abnormal pressure difference, sewage discharge failure or actuator failure is detected.

8. The building water supply terminal cleaning device according to claim 6, characterized in that, The controller (45) is also connected to the secondary water supply monitoring platform. The data sent by the controller (45) to the secondary water supply monitoring platform includes differential pressure signal, opening and closing status of the solenoid valve (43) and the electric sludge discharge valve (131), number of sewage discharges, duration of a single sewage discharge, and equipment fault alarm information.

9. The building water supply terminal cleaning device according to claim 6, characterized in that, The controller (45) is set to a preset time interval. When the pressure difference is lower than the threshold and reaches the preset time interval, sewage discharge is triggered.

10. A water supply network circulation system, characterized in that, Includes a building water supply terminal cleaning device as described in any one of claims 1-9.

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