Sewage filtering device with self-cleaning and anti-blocking functions

Abstract

The present application provides a kind of sewage filtering device with self-cleaning anti-blocking function, belong to sewage treatment equipment technical field, including shell, filter cartridge installed in shell, water inlet pipe, water outlet pipe, residue discharge pipe are provided on shell, water inlet valve is provided on water inlet pipe, multiple-pass switching valve is provided on water outlet pipe, residue discharge valve is provided on residue discharge pipe, multiple-pass switching valve is connected with water storage backflush unit;Water storage backflush unit includes support, telescopic water storage bag, pressing plate, flushing unit and spring A, one end of telescopic water storage bag is fixedly connected with support, the other end is fixedly connected with pressing plate, support is provided with support rod, support rod is provided with spring A, spring A is in contact with pressing plate and support.The present application can effectively solve the technical problems of complex structure, incomplete cleaning, high energy consumption, lack of intelligent response mechanism and inconvenient maintenance of sewage filtering device in the prior art.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, specifically to a wastewater filtration device with self-cleaning and anti-clogging functions. Background Technology

[0002] With the development of wastewater treatment technology, various wastewater filtration devices have been widely used in municipal, industrial, and domestic wastewater treatment. However, these products still have many problems in actual use, especially in long-term operation, such as filter clogging, inconvenient cleaning, and insufficient self-cleaning ability, which seriously affect filtration efficiency and equipment stability. To address these problems, existing technologies have proposed various wastewater filtration devices with certain self-cleaning or anti-clogging functions, but their structure and function still have obvious limitations.

[0003] Patent CN113499626B discloses a wastewater filter box, including a collection frame and a first fixed frame. The first fixed frame is fixedly installed on the upper surface of the collection frame. Two filter cylinders are symmetrically arranged inside the first fixed frame. The two ends of each filter cylinder are rotatably connected to the inner wall of the first fixed frame via rotating shafts. Each rotating shaft is hollow and communicates with the inside of each filter cylinder. A driven gear is fixedly installed on each rotating shaft. An inlet pipe and an outlet pipe are respectively provided on the two side walls of the first fixed frame. In this invention, a drive motor drives a rotating rod to rotate, which in turn drives a worm gear to rotate. The worm gear drives a worm wheel to rotate, and the worm wheel drives a cleaning brush to rotate via a connecting shaft. The cleaning brush drives the bristles to rotate, cleaning the surface of the filter cylinder and preventing impurities from clogging the filter holes and filter element mesh. The cleaning mechanism of this device relies on an external motor drive and a complex gear transmission system, resulting in a relatively complex structure and high maintenance costs. Furthermore, the cleaning brush can only perform linear sweeping on the outer surface of the filter cartridge, failing to penetrate deep into the filter pores or achieve multi-angle agitation cleaning, leaving fine particles and sticky impurities easily residued, leading to incomplete cleaning. In addition, the device lacks flow sensing or an automatic start-stop mechanism, continuing to operate even under no-pollution or low-load conditions, resulting in energy waste.

[0004] Patent CN107986471B discloses a wastewater filter, including a housing, filter screen, guide wheels, a motor, and a filter screen cleaning module. The housing is rectangular, with an inlet on the left and an outlet on the right. Multiple guide wheels, each a round bar, are horizontally arranged at different heights inside the housing and mounted on the front and rear side walls. The filter screen is a rectangular mesh structure, with its ends connected to form a ring that fits onto the guide wheels, creating multiple layers of filter screen belts in horizontal, vertical, and inclined configurations within the housing. The motor is mounted on the side wall of the housing and connected to one of the guide wheels. The filter screen cleaning module cleans the filter screen. This structure allows for simultaneous filtration and cleaning, improving continuous processing capacity. However, the cleaning module often relies on fixed nozzles or scrapers, requiring additional high-pressure water or air sources for cleaning, resulting in low system integration. Furthermore, the filter screen belts are prone to shifting or wear due to uneven tension during operation, affecting sealing and service life. More importantly, the device lacks an intelligent sensing mechanism for the degree of clogging and cannot dynamically adjust the cleaning frequency according to the actual pollution load, resulting in over-cleaning when lightly polluted and insufficient cleaning when heavily polluted, making it difficult to achieve efficient and energy-saving adaptive operation.

[0005] Existing wastewater filtration devices with self-cleaning functions generally suffer from drawbacks such as complex structure, incomplete cleaning, high energy consumption, and lack of intelligent response mechanisms, making it difficult to meet the demands of modern wastewater treatment systems for high efficiency, low consumption, maintenance-free operation, and intelligent operation. Summary of the Invention

[0006] The purpose of this invention is to provide a sewage filtration device with self-cleaning and anti-clogging function, which can effectively solve the technical problems of existing sewage filtration devices, such as complex structure, incomplete cleaning, high energy consumption, lack of intelligent response mechanism and inconvenient maintenance.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0008] A wastewater filtration device with self-cleaning and anti-clogging function includes a housing and a filter cartridge installed inside the housing.

[0009] The outer casing is equipped with an inlet pipe, an outlet pipe, and a slag discharge pipe. The inlet pipe is equipped with an inlet valve, the outlet pipe is equipped with a multi-way switching valve, and the slag discharge pipe is equipped with a slag discharge valve. The multi-way switching valve is connected to a water storage backwash unit.

[0010] The water storage backwash unit includes a bracket, a telescopic water storage bag, a pressure plate, a flushing unit, and a spring A. One end of the telescopic water storage bag is fixedly connected to the bracket, and the other end is fixedly connected to the pressure plate. A support rod is provided on the bracket, and the spring A is provided on the support rod. The spring A contacts the pressure plate and the bracket. A multi-way switching valve is connected to the telescopic water storage bag through a first pipe. The flushing unit is located inside the outer shell and is connected to the telescopic water storage bag through a second pipe. A first valve is provided on the second pipe.

[0011] A monitoring unit is installed at the water inlet pipe to monitor the water pressure at the water inlet pipe. The monitoring unit, slag discharge valve, multi-way switching valve, first valve and controller are connected.

[0012] Furthermore, a check valve is installed on the first pipeline.

[0013] Furthermore, the rinsing unit includes an annular pipe and several spray heads. The annular pipe is installed inside the housing, and the several spray heads are installed on the annular pipe. The spray angles of the spray heads are different, and the spray direction of the spray heads is towards the filter cartridge.

[0014] Furthermore, a support plate is provided inside the outer shell, and the filter cartridge is in contact with the support plate.

[0015] Furthermore, a detachable top cover is provided on the top of the outer casing, and a fixing unit is provided on the top cover. After the fixing unit comes into contact with the filter cartridge, it is used to fix the filter cartridge to the support plate.

[0016] Furthermore, the fixing unit includes a guide rod, a spring B, and a limiting plate. The limiting plate is fixedly mounted on the guide rod and is threadedly connected to the upper cover. The filter cylinder has a through hole through which the guide rod passes. The spring B is fitted onto the guide rod, with its upper end in contact with the limiting plate and its lower end in contact with the filter cylinder.

[0017] Furthermore, an adjustment handwheel is provided at the upper end of the guide rod.

[0018] Furthermore, thrust ball bearings are provided between spring B and the limiting plate, and between spring B and the filter cylinder.

[0019] Furthermore, a sealing gasket is provided between the outer casing and the top cover.

[0020] Furthermore, the telescopic water storage bag includes a bottom plate, a top plate, and a folding section connecting the top plate and the bottom plate, the folding section having a continuous bending structure.

[0021] Furthermore, a backwash unit is provided inside the housing. The backwash unit includes a first annular pipe, a first spray head, and a pulse pump. A baffle is provided on the side of the filter cartridge. The first spray head is provided on the first annular pipe, and the spray direction of the first spray head is towards the baffle. The first annular pipe is connected to a telescopic water storage bag through a third pipe, and the pulse pump is provided on the third pipe. The pulse pump is connected to a controller to control the pulse pump to make the water jet from the first spray head hit the baffle in a pulse manner. Under the action of spring B, the filter cartridge can vibrate under the impact of the water flow.

[0022] Furthermore, a handle is provided on the filter cartridge.

[0023] Furthermore, the support plate has a groove, and the lower end of the filter cylinder has a limiting ring with a protrusion made of elastic material. The protrusion engages with the groove, and a water outlet is located above the limiting ring. If the filter cylinder becomes clogged and the monitoring unit malfunctions, the spring B is compressed under water pressure, causing the filter cylinder to move upwards. At this point, the protrusion disengages from the groove, connecting the groove to the water outlet, thus achieving drainage and pressure relief. This ensures a safety mechanism in case of monitoring unit failure and improves operational safety.

[0024] Furthermore, a touch switch is installed inside the housing. The touch switch is connected to the controller. When the filter cartridge moves upward, the touch switch is triggered. The controller is connected to an alarm device to achieve the purpose of alarm.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] Compared to existing technologies, this invention has a simpler structure, eliminating the need for complex motor drives and gear transmission systems. Self-cleaning and anti-clogging are achieved through a water-storage backwashing unit. During normal filtration, wastewater enters the housing through the inlet pipe, passes through the filter cartridge, and exits through the outlet pipe. Initially, filtered water enters the telescopic water storage bag via a multi-way switching valve and the first pipe, causing it to expand and compress spring A. This process requires no additional energy, saving energy. When the monitoring unit detects abnormal water pressure in the inlet pipe, indicating potential clogging of the filter cartridge, the controller switches the multi-way switching valve, closing the outlet pipe and opening the first valve. Spring A resets, pushing the pressure plate and forcing water from the telescopic water storage bag through the second pipe to the backwashing unit to backwash the filter cartridge. Impurities are discharged through the slag discharge pipe. This invention can initiate backwashing based on the actual clogging situation according to its response mechanism, avoiding energy waste or untimely cleaning issues caused by the lack of a sensing mechanism in existing technologies, thus ensuring filtration efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 This is a schematic diagram showing the connection relationship between the fixing unit and the filter cylinder of the present invention.

[0030] Figure 3 For the present invention Figure 1 A magnified view of a portion of point A in the middle.

[0031] Figure 4 For the present invention Figure 1 A magnified view of a portion of point B in the middle.

[0032] Figure label:

[0033] 101 - Shell, 102 - Top cover, 103 - Slag discharge pipe, 104 - Slag discharge valve, 105 - Multi-way switching valve, 106 - Water outlet pipe, 107 - Check valve, 108 - Water flow hole, 109 - Spring A, 110 - Pressure plate, 111 - Bracket, 112 - Support rod, 113 - Telescopic water storage bag, 114 - First pipe, 115 - Second pipe, 116 - Guide rod, 117 - Limiting plate, 118 - Spring B, 119 - Through hole, 120 - Annular pipe, 121 - Filter cylinder, 122 - Support plate, 123 - First valve, 124 - Spray head, 125 - First annular pipe, 126 - Pad, 127 - Electromagnet, 128 - First spray head, 129 - Thrust bearing, 130 - Baffle, 131 - Groove, 132 - Limiting ring, 133 - Protrusion. Detailed Implementation

[0034] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the embodiments of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0035] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of the present invention 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 the embodiments of the present invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0038] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The following disclosure provides many different implementations or examples for carrying out different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0040] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0041] See Figure 1 - Figure 4 This embodiment discloses a wastewater filtration device with self-cleaning and anti-clogging function, including a housing and a filter cylinder 121 installed inside the housing.

[0042] The outer casing is equipped with an inlet pipe, an outlet pipe 106, and a slag discharge pipe 103. The inlet pipe is equipped with an inlet valve, the outlet pipe 106 is equipped with a multi-way switching valve 105, the slag discharge pipe 103 is equipped with a slag discharge valve 104, and the multi-way switching valve 105 is connected to a water storage backwash unit.

[0043] The water storage backwash unit includes a bracket 111, a telescopic water storage bag, a pressure plate 110, a flushing unit, and a spring A. One end of the telescopic water storage bag is fixedly connected to the bracket 111, and the other end is fixedly connected to the pressure plate 110. A support rod 112 is provided on the bracket 111, and the spring A is provided on the support rod 112. The spring A contacts the pressure plate 110 and the bracket 111. A multi-way switching valve 105 is connected to the telescopic water storage bag through a first pipe 114. The flushing unit is located inside the outer casing and is connected to the telescopic water storage bag through a second pipe 115. A first valve 123 is provided on the second pipe 115.

[0044] A monitoring unit is installed at the water inlet pipe to monitor the water pressure at the water inlet pipe. The monitoring unit, slag discharge valve 104, multi-way switching valve 105, first valve 123 are connected to a controller.

[0045] The monitoring unit is a pressure sensor, which triggers an alarm when the water pressure exceeds a set threshold.

[0046] Compared to existing technologies, this invention has a simpler structure, eliminating the need for complex motor drives and gear transmission systems. Self-cleaning and anti-clogging are achieved through a water storage backwash unit. During normal filtration, wastewater enters the housing 101 through the inlet pipe, is filtered by the filter cartridge 121, and then discharged from the outlet pipe 106. Initially, filtered water enters the telescopic water storage bag 113 through the multi-way switching valve 105 and the first pipe 114, causing it to expand. The pressure plate 110 compresses the spring A109. This process requires no additional energy, saving energy consumption. When the monitoring unit detects abnormal water pressure in the inlet pipe, the filter cartridge 121 may be clogged. The controller controls the multi-way switching valve 105 to switch the flow, closing the outlet pipe 106 and opening the first valve 123. The spring A109 resets, pushing the pressure plate 110, forcing the water in the telescopic water storage bag 113 through the second pipe 115 to the flushing unit to backwash the filter cartridge 121. Impurities are discharged from the slag discharge pipe 103. This invention can initiate backwashing based on the actual blockage situation according to the response mechanism, avoiding the energy waste or untimely cleaning problems caused by the lack of a sensing mechanism in the prior art, and ensuring filtration efficiency.

[0047] Furthermore, in some preferred embodiments, a one-way valve 107 is provided on the first pipe 114. The one-way valve 107 on the first pipe 114 can prevent water in the telescopic water storage bag 113 from flowing back to the outlet pipe 106, ensuring that the water storage backwash unit can store enough water for backwashing. At the same time, it reduces the pressure of the water pressure in the telescopic water storage bag 113 on the multi-way switching valve 105. This embodiment does not require an additional high-pressure water source, and uses the water filtered by itself for backwashing. The system has a high degree of integration, does not require an additional water source, further simplifies the structure, and reduces costs.

[0048] Furthermore, in some preferred embodiments, the rinsing unit includes an annular pipe 120 and a plurality of spray heads 124. The annular pipe 120 is disposed inside the housing, and the plurality of spray heads 124 are disposed on the annular pipe 120. The spray angles of the spray heads 124 are different, and the spray direction of the spray heads 124 is towards the filter cartridge 121. By setting different spray angles, it is ensured that the sprayed water acts on the filter cartridge 121, thereby achieving a thorough rinsing of the filter cartridge 121. Rinsing the filter cartridge 121 from different angles can penetrate deep into the filter pores, effectively removing fine particles and sticky impurities, solving the problem of incomplete cleaning in the prior art, and improving the comprehensiveness of cleaning.

[0049] Furthermore, in some preferred embodiments, a support plate 122 is provided inside the outer casing, and the filter cartridge 121 contacts the support plate 122, which facilitates the installation of the filter cartridge 121.

[0050] Furthermore, a detachable top cover 102 is provided on the top of the outer casing. A fixing unit is provided on the top cover 102. After contacting the filter cartridge 121, the fixing unit is used to fix the filter cartridge 121 to the support plate 122. The fixing unit is used to fix the filter cartridge 121.

[0051] The fixing unit includes a guide rod 116, a spring B118, and a limiting plate 117. The limiting plate 117 is fixedly mounted on the guide rod 116 and is threadedly connected to the upper cover 102. The filter cylinder 121 is provided with a through hole 119, through which the guide rod 116 passes. The spring B118 is fitted on the guide rod 116, with its upper end in contact with the limiting plate 117 and its lower end in contact with the filter cylinder 121.

[0052] The filter cartridge 121 is secured to the support plate 122 by elasticity. This elastic fixing method not only secures the filter cartridge 121 but also acts as a buffer when the filter cartridge 121 is subjected to impact, protecting it. Compared with the rigid transmission of filter belts in the prior art, this reduces wear caused by rigid connections, extends the service life of the filter components, and facilitates installation and disassembly. More importantly, rotating the guide rod 116 allows for adjustment of the preload.

[0053] Furthermore, an adjusting handwheel is provided at the upper end of the guide rod 116. Rotation can drive the guide rod 116 and the limiting plate 117 to rotate. Since the limiting plate 117 is threadedly connected to the upper cover 102, the position of the limiting plate 117 can be adjusted, thereby adjusting the elastic force of the spring B118 to adapt to the fixing requirements of the filter cartridge 121 of different specifications or working conditions. This adjustability makes the device more versatile and solves the problem that the fixing structure in the prior art cannot adapt to different working conditions.

[0054] Furthermore, in some preferred embodiments, thrust ball bearings are provided between spring B118 and the limiting plate 117, and between spring B118 and the filter cylinder 121. The thrust ball bearings between spring B118 and the limiting plate 117 and the filter cylinder 121 reduce the frictional force during the extension and retraction of spring B118, ensuring smooth extension and retraction, guaranteeing the normal operation of the fixing unit, and extending the service life of spring B118. Compared to the problem of easy component wear caused by the lack of such friction-reducing structures in the prior art, the present invention reduces maintenance costs and improves the stability of the device.

[0055] A sealing gasket is provided between the outer shell and the upper cover 102. The sealing gasket enhances the sealing performance and prevents sewage leakage.

[0056] Furthermore, in some preferred embodiments, the telescopic water storage bag includes a bottom plate, a top plate, and a folding section connecting the top plate and the bottom plate, the folding section having a continuous bending structure. The continuous bending folding section of the telescopic water storage bag 113 allows for smooth expansion and contraction, effectively storing and discharging water, ensuring the working efficiency of the water storage backflushing unit. Compared to the complex water storage structures in the prior art, the telescopic water storage bag 113 of the present invention has a simple structure, reliable operation, and reduces the probability of failure.

[0057] Furthermore, in some preferred embodiments, a backwash unit is provided inside the housing 101. The backwash unit includes a first annular pipe 125, a first spray head 128, and a pulse pump. A baffle 130 is provided on the side of the filter cylinder 121. The first spray head 128 is provided on the first annular pipe 125. The spray direction of the first spray head 128 is towards the baffle 130. The first annular pipe 125 is connected to the telescopic water storage bag 113 through a third pipe. The pulse pump is provided on the third pipe. The pulse pump is connected to a controller to control the pulse pump to make the water jet from the first spray head 128 impact the baffle 130 in a pulse manner. Under the action of the spring B118, the filter cylinder 121 can vibrate under the impact of the water flow.

[0058] The first annular pipe 125 inside the housing 101 is connected to the telescopic water storage bag 113 via a third pipe. A pulse pump controls the first spray head 128 to spray water in a pulsed manner, impacting the baffle 130 on the side of the filter cartridge 121. Under the action of the spring B118, the filter cartridge 121 can intermittently move upward and downward, thus achieving vibration. This vibration makes it easier for impurities on the surface and inside the filter cartridge 121 to detach, and combined with backwashing, further enhances the self-cleaning effect. Compared with the single cleaning brush cleaning method in the prior art, the cleaning is more thorough, solving the problem of fine particles and sticky impurities remaining.

[0059] Furthermore, a handle is provided on the filter cartridge 121. The handle facilitates easy handling, making installation and disassembly more convenient and reducing maintenance difficulty.

[0060] Furthermore, in practical applications, to ensure that the position of the filter cartridge 121 does not change, the filter cartridge 121 is slidably connected to the housing 101, such as by using a sliding groove and a slider.

[0061] Furthermore, in some preferred embodiments, the support plate 122 is provided with a groove 131, and the lower end of the filter cylinder 121 is provided with a limiting ring 132. The limiting ring 132 is provided with a protrusion 133, which is made of elastic material. The protrusion 133 cooperates with the groove 131, and a water flow hole 108 is provided above the limiting ring 132. When the filter cylinder 121 is blocked, if the monitoring unit malfunctions, the spring B118 is compressed under the action of water pressure, and the filter cylinder 121 moves upward. At this time, the protrusion 133 disengages from the groove 131, so that the groove 131 connects with the water flow hole 108, thereby achieving the purpose of drainage and pressure relief, ensuring the defense mechanism after the monitoring unit fails, and improving the safety of use.

[0062] The groove 131 of the support plate 122 engages with the elastic protrusion 133 on the limiting ring 132 of the filter cartridge 121. When the filter cartridge 121 is blocked and the monitoring unit malfunctions, the water pressure compresses the spring B118, causing the filter cartridge 121 to move upward, disengaging the protrusion 133 from the groove 131. The groove 131 then connects with the water outlet 108 to drain and relieve pressure. This design provides an effective defense mechanism against monitoring unit failure, avoiding safety accidents caused by excessive internal pressure due to the lack of such protection measures in existing technologies, and improving operational safety.

[0063] Furthermore, in some preferred embodiments, a touch switch is provided inside the housing 101. The touch switch is connected to the controller. When the filter cartridge 121 moves upward, the touch switch is triggered. The controller is connected to an alarm device to achieve the purpose of alarm.

[0064] The touch switch inside housing 101 is triggered when filter cartridge 121 moves upward, causing the controller to activate the alarm device, which promptly alerts staff to potential blockage of filter cartridge 121 and possible malfunction of the monitoring unit. Compared to existing technologies that lack effective alarm mechanisms, this invention allows staff to address problems promptly, further improving the safety and reliability of the device and ensuring continuous wastewater treatment.

[0065] Furthermore, in some preferred embodiments, for wastewater of medium viscosity containing a moderate amount of impurities, the problems of unstable cleaning effect and easy wear of filter screen in the prior art are solved. The pulse pump has a pulse frequency of 20-30 times / minute, and under the dual action of water backwashing and shaking, it can thoroughly remove medium viscosity impurities adhering to the surface of the filter cartridge 121 and inside the filter holes.

[0066] In practical use, a pulse frequency of 30 pulses per minute is preferred.

[0067] Furthermore, a rigid buffer rubber pad is provided on the support plate 122.

[0068] To facilitate a better understanding of the present invention by those skilled in the art, the present invention will be further described below in conjunction with a specific wastewater treatment process.

[0069] Water intake and preliminary filtration: Wastewater enters the housing 101 through the water inlet pipe and flows through the filter cartridge 121. The filter cartridge 121 is installed on the support plate 122 to perform preliminary filtration of the water and intercept impurities.

[0070] Water storage and pressure changes: After filtration, the water enters the telescopic water storage bag 113 through the first pipe 114 via the multi-way switching valve 105 and the one-way valve 107 during the initial filtration stage. As water is continuously injected, the telescopic water storage bag 113 expands due to water filling, squeezing the spring A109. The spring A109 is compressed, and when the water storage reaches the preset volume, the filtered water flows out from the outlet pipe 106 and enters the subsequent water use stage.

[0071] Backwashing process: When the filter screen of the filter cartridge 121 is clogged with impurities, the pressure on the inlet side of the housing 101 increases. The monitoring unit at the inlet pipe senses the pressure change and determines that backwashing is required. At this time, the slag discharge valve 104 on the slag discharge pipe 103 is opened, the multi-way switching valve 105 is closed, and the first valve 123 is opened.

[0072] Backwashing power and execution: Under the action of the spring A109's return force, the clean water stored in the telescopic water storage bag 113 is squeezed and flows through the second pipe 115 to the annular pipe 120. The spray head 124 on the annular pipe 120 sprays water in the opposite direction to the filter cylinder 121. The reverse water flow impact force washes off the impurities attached to the filter cylinder 121. The impurities are discharged with the water flow through the slag discharge pipe 103 and the slag discharge valve 104.

[0073] At the same time, the controller controls the pulse pump to work, so that the first spray head 128 of the first annular pipe 125 sprays water at the pulse frequency of the corresponding embodiment to hit the baffle 130. Under the action of the spring B118, the filter cylinder 121 vibrates, which enhances the cleaning effect and solves the problem of incomplete cleaning.

[0074] Filtration Resumption: After backwashing, close the slag discharge valve 104 and restore the multi-way switching valve 105 to its open state. The system re-enters the filtration state, and the filtered clean water can be injected into the telescopic water storage bag 113 for repeated water storage and supply cycles, ensuring continuous filtration and on-demand backwashing cleaning, and maintaining stable system operation. When the filter cartridge 121 is clogged and the monitoring unit malfunctions, the water pressure in the inlet pipe gradually increases, pushing the filter cartridge 121 upward. The spring B118 is compressed, and the protrusion 133 on the lower limit ring 132 of the filter cartridge 121 disengages from the groove 131 on the support plate 122. The groove 131 connects with the water outlet 108, realizing drainage and pressure relief to avoid excessive pressure causing safety accidents. At the same time, the upward movement of the filter cartridge 121 triggers the touch switch, and the controller controls the alarm device to sound an alarm, reminding personnel to handle the situation and improving safety.

[0075] When the filter cartridge 121 needs to be replaced or cleaned, simply open the top cover 102 and remove the filter cartridge 121 using the handle. This operation is convenient and reduces maintenance difficulty.

[0076] Furthermore, a pad 126 is provided on the bracket 111, and an electromagnet 127 is provided on the pad 126. The pressure plate 110 is made of iron. After the telescopic water storage bag 113 is filled with water, the pressure plate 110 comes into contact with the electromagnet 127, achieving adsorption of the pressure plate 110 and preventing the telescopic water storage bag 113 from being continuously compressed under normal conditions. The electromagnet 127 is connected to the controller via a relay.

[0077] Furthermore, in some preferred embodiments, the housing 101 is provided with a protrusion, so that the inner wall of the housing 101 forms a concave structure, and the flushing unit and the backflushing unit are located in the concave structure.

[0078] This embodiment utilizes a concave structure to completely embed the rinsing unit and backwash unit within the contour of the housing 101, creating an unobstructed access channel. Operators can directly and vertically remove the filter cartridge 121 without additional disassembly of pipes or adjustment of angles. This solves the problem of requiring multiple disassembly steps for maintenance in existing technologies, and is particularly suitable for operation scenarios in confined spaces.

[0079] Furthermore, in some preferred embodiments, a second pressure sensor is provided on the outlet pipe 106, and the controller is connected to the second pressure sensor. The controller calculates the real-time pressure difference between the inlet and outlet ends. , For inlet water pressure, The outlet water pressure;

[0080] The cleaning effect is judged by the ΔP decrease rate. If ΔP > 80% after backflushing... ΔP i If the initial pressure difference of the equipment is the starting point, a secondary backflushing is initiated and the pulse pump frequency is increased by 20%-50%. By monitoring the pressure difference ΔP between the inlet and outlet in real time, the degree of clogging of the filter components and the backflushing cleaning effect can be accurately quantified, solving the problem of insufficient or excessive cleaning caused by traditional methods that rely solely on timed backflushing.

[0081] This invention sets a criterion that ΔP must recover to more than 80% of its initial value after backflushing, and is equipped with a secondary backflushing and pulse frequency adjustment mechanism. This ensures that the filter components restore optimal filtration performance and avoids problems such as decreased filtration efficiency and increased energy consumption caused by incomplete cleaning. The design of dynamically adjusting the pulse pump frequency can specifically enhance the impact force of the secondary backflushing, adapt to the cleaning needs of different degrees of clogging, and improve the cleaning success rate.

[0082] Furthermore, the controller incorporates a dynamic learning algorithm to record the ΔP value before and after each backflush, establishing a mathematical model for the cleaning efficiency η:

[0083] ;

[0084] The pressure difference after recoil. The pressure difference before recoil;

[0085] When η < 0.6, the pulse frequency of the next backflush will automatically increase to 1.3 times the reference value;

[0086] When η > 0.9, the pulse frequency decreases to 0.8 times the reference value.

[0087] In this invention, the abstract cleaning effect is transformed into a quantifiable indicator, providing data support for optimizing backwash parameters. The pulse frequency is dynamically adjusted based on the η value: when η < 0.6, it is increased to 1.3 times the baseline value; when η > 0.9, it is decreased to 0.8 times. This achieves on-demand matching of backwash intensity, ensuring cleaning effectiveness even in cases of severe clogging while avoiding energy waste during mild clogging, thus reducing equipment operating energy consumption. The dynamic learning algorithm continuously optimizes parameters by recording backwash data each time, enabling the equipment to adapt to different water qualities and filtration needs at different operating stages, extending the filter cartridge's lifespan.

[0088] Furthermore, in some preferred embodiments, a turbidity sensor is also installed inside the outlet pipe 106, and the controller integrates the pressure difference ΔP and the turbidity value to construct a cleaning confidence factor CF.

[0089] ;

[0090] Among them, is the pressure difference after backwashing, is the designed maximum allowable pressure difference, is the measured value of the effluent turbidity, is the upper turbidity threshold, k1 and k2 are weighting coefficients (satisfying k1 + k2 = 1, and 0 < k1, k2 < 1), used to adjust the influence weights of the pressure difference and turbidity; the enhanced cleaning mode is triggered when CF < 0.7.

[0091] Simultaneously collect after backwashing and , if the calculated CF < 0.7, the controller determines that the cleaning effect is untrustworthy and immediately triggers enhanced cleaning (strong vibration cleaning mode), and the pulse pump frequency is increased by 80% to perform the strong vibration cleaning mode.

[0092] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted to include the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0093] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A wastewater filtration device with self-cleaning and anti-clogging function, comprising a housing, a filter cylinder installed inside the housing, an inlet pipe, an outlet pipe, and a sludge discharge pipe provided on the housing, and an inlet valve provided on the inlet pipe, characterized in that: The water outlet pipe is equipped with a multi-way switching valve, the slag discharge pipe is equipped with a slag discharge valve, and the multi-way switching valve is connected to a water storage backflushing unit. The water storage backwash unit includes a bracket, a telescopic water storage bag, a pressure plate, a flushing unit, and a spring A. One end of the telescopic water storage bag is fixedly connected to the bracket, and the other end is fixedly connected to the pressure plate. A support rod is provided on the bracket, and the spring A is provided on the support rod. The spring A contacts the pressure plate and the bracket. A multi-way switching valve is connected to the telescopic water storage bag through a first pipe. The flushing unit is located inside the outer shell and is connected to the telescopic water storage bag through a second pipe. A first valve is provided on the second pipe. A monitoring unit is installed at the water inlet pipe to monitor the water pressure at the water inlet pipe. The monitoring unit, slag discharge valve, multi-way switching valve, and first valve are connected to a controller. A one-way valve is installed on the first pipe. The flushing unit includes an annular pipe and several spray heads. The annular pipe is installed inside the outer shell, and the spray heads are installed on the annular pipe. The spray angles of the spray heads are different, and the spray direction of the spray heads is towards the filter cylinder. A support plate is installed inside the outer shell, and the filter cylinder contacts the support plate. A detachable top cover is installed on the top of the outer shell, and a fixing unit is installed on the top cover. The fixing unit is used to fix the filter cylinder to the support plate after contacting the filter cylinder. The fixing unit includes a guide rod, spring B, and a limiting plate. The limiting plate is fixedly installed on the guide rod and threadedly connected to the top cover. A through hole is provided on the filter cylinder, through which the guide rod passes. Spring B is fitted on the guide rod, with the upper end of spring B contacting the limiting plate and the lower end contacting the filter cylinder. The support plate has a groove, and the lower end of the filter cylinder has a limit ring with a protrusion made of elastic material. The protrusion cooperates with the groove, and a water flow hole is provided above the limit ring. A backwash unit is provided inside the housing, which includes a first annular pipe, a first spray head, and a pulse pump. A baffle is provided on the side of the filter cylinder, and the first spray head is provided on the first annular pipe. The spray direction of the first spray head is towards the baffle. The first annular pipe is connected to a telescopic water storage bag through a third pipe, and the pulse pump is provided on the third pipe. The pulse pump is connected to a controller to control the pulse pump to make the water jet from the first spray head hit the baffle in a pulse manner. Under the action of spring B, the filter cylinder can vibrate under the impact of the water flow. A touch switch is provided inside the housing and is connected to the controller. When the filter cylinder moves upward, the touch switch is triggered. The controller is connected to an alarm device to achieve the purpose of alarm. The telescopic water storage bag includes a bottom plate, a top plate, and a folding section connecting the top plate and the bottom plate. The folding section has a continuous bending structure.

2. A wastewater filtration device with self-cleaning and anti-clogging function according to claim 1, characterized in that: The pulse frequency of the pulse pump is 20-30 times per minute.

3. A wastewater filtration device with self-cleaning and anti-clogging function according to claim 1, characterized in that: An adjustment handwheel is provided at the upper end of the guide rod.

4. A wastewater filtration device with self-cleaning and anti-clogging function according to claim 3, characterized in that: Thrust ball bearings are installed between spring B and the limiting plate, and between spring B and the filter cylinder.

5. A wastewater filtration device with self-cleaning and anti-clogging function according to claim 1, characterized in that: A sealing gasket is provided between the outer shell and the top cover.

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