Filtering device, water circulation system and road cleaning equipment

Abstract

The utility model relates to the technical field of filtering, and discloses a filtering device, a water circulation system and road cleaning equipment.The filtering device comprises a loading body, a filtering assembly and a first washing unit, a cavity is formed in the loading body and used for containing sewage, meanwhile, the loading body is provided with an input port and an output port, and the sewage enters the cavity through the input port and flows into the cavity through the output port; the bottom of the cavity is designed to be an inclined guide face, the output port is located at the first end, namely the end with the lowest horizontal height, of the inclined guide face, it is guaranteed that fluid can be smoothly guided out, and the filtering assembly comprises a membrane assembly, is installed in the cavity and is responsible for filtering sewage. The first flushing unit is connected to the loading main body, extends into the chamber and is used for flushing the membrane module so as to maintain the filtering efficiency and avoid the influence of dirt accumulation on the equipment performance, and the design of the filtering device optimizes the flowing path of sewage, improves the filtering and flushing efficiency and ensures the efficient and stable operation of the filtering system.

Description

Technical Field

[0001] This application relates to the field of filtration technology, and further to a filtration device, a water circulation system, and road cleaning equipment. Background Technology

[0002] With the acceleration of urbanization, the cleaning and maintenance of the urban environment has become increasingly important. During the cleaning process, road cleaning equipment generates and collects large amounts of wastewater, which is then used for further road cleaning. However, existing road cleaning equipment only performs simple treatment on this wastewater, which still contains various impurities and is difficult to reuse effectively for road cleaning. Therefore, it is necessary to perform deep filtration treatment on this collected wastewater to bring it up to a standard suitable for reuse in road cleaning.

[0003] Currently, the filtration devices used in this field are not designed to fully consider the smooth discharge of sewage, which leads to the accumulation of sewage and impurities inside the device, affecting the operating efficiency of the device. At the same time, due to the poor sewage discharge, dirt easily accumulates on the filter elements, which not only reduces the filtration efficiency but may also cause the filtration system to fail prematurely. Utility Model Content

[0004] In view of the above-mentioned technical problems, the purpose of this application is to provide a filtration device, a water circulation system and a road cleaning equipment, which aims to improve the sewage discharge efficiency through optimized design, thereby enhancing filtration performance and reducing maintenance costs.

[0005] To achieve the above objectives, this application provides a filtration device for filtering wastewater in road cleaning equipment, comprising:

[0006] The loading body has a chamber inside, and the loading body has an inlet and an outlet for the input or output of sewage relative to the chamber. The bottom of the loading body is provided with an inclined guide surface, and the outlet is close to the first end of the inclined guide surface. The first end is the end with the lowest horizontal height on the inclined guide surface, so that fluid can be discharged from the outlet along the inclined guide surface.

[0007] A filtration assembly, comprising a membrane assembly disposed within the chamber for filtering wastewater;

[0008] The first flushing unit is connected to the loading body and extends into the chamber for flushing the membrane assembly.

[0009] In some embodiments, the loading body includes a first sidewall and a second sidewall, which are parallel and opposite to each other; the first sidewall is connected to the first end, and the second sidewall is connected to the second end of the inclined guide surface, the second end being the end with the highest horizontal height on the inclined guide surface; the first flushing unit extends into the chamber from the second sidewall and is correspondingly disposed with respect to the middle or bottom of the membrane assembly to flush the middle or bottom of the membrane assembly.

[0010] In some embodiments, the outlet is located on the first sidewall and close to the inclined guide surface, the orientation of the first flushing unit is at a preset angle to the horizontal direction, and the orientation of the first flushing unit is not aligned with the outlet to prevent backflow of sewage or sludge at the outlet during high-pressure flushing.

[0011] In some embodiments, the number of the first rinsing units is at least two, and the first rinsing units are evenly arranged along the width direction of the first sidewall; and / or, the number of membrane assemblies is one or more, and in the case of multiple membrane assemblies, the membrane assemblies form a multi-row or multi-row membrane group inside the loading body, and the membrane group has one or more layers.

[0012] In some embodiments, the bottom of the loading body is divided into two sub-bottom surfaces and one main bottom surface, the main bottom surface being located between the two sub-bottom surfaces. The two sub-bottom surfaces have a deflection angle relative to the vertical plane to guide the longitudinal flow of sewage, and the main bottom surface has a deflection angle relative to the horizontal plane to guide the lateral flow of sewage.

[0013] In some embodiments, both the secondary bottom surface and the primary bottom surface are planar structures, and both secondary bottom surfaces expand outward in a first direction away from the central axis, wherein the first direction is the direction from the first end to the second end.

[0014] In some embodiments, the filtering component further includes:

[0015] A hydrocyclone is used for filtration of wastewater before it passes through the membrane module. The hydrocyclone is fixed to the loading body and has an inlet, an overflow outlet, and a bottom outlet.

[0016] The inlet is used to input wastewater into the hydrocyclone, the overflow port is connected to an overflow pipe to input the upper clear liquid formed by the filtration of the hydrocyclone into the chamber through the overflow pipe, and the bottom outlet is used to discharge the lower wastewater or sludge formed by the filtration of the hydrocyclone.

[0017] In some embodiments, a limiting ring is provided on one side wall of the loading body, the limiting ring being located in the upper middle part of the loading body, and a limiting flange is provided on the end of the hydrocyclone near the overflow port. The limiting ring is sleeved on the outer periphery of the hydrocyclone and located below the limiting flange, so that under the action of gravity, the limiting flange of the hydrocyclone abuts against the limiting ring to prevent the hydrocyclone from falling off.

[0018] Another aspect of this application also provides a water circulation system, including: any of the above-mentioned filtration devices, a water tank, and a suction module. The filtration device is disposed in the water tank, and one end of the suction module extends into the water tank, while the other end is connected to the filtration assembly, so that the liquid filtered by the filtration assembly can flow into the water tank and then be pumped to the filtration assembly for further filtration through the suction module.

[0019] Another aspect of this application also provides a road cleaning device, including: any of the above-described filtration devices or the above-described water circulation system, and a cleaning component, wherein the cleaning component is directly or indirectly connected to the loading body and is used to obtain liquid filtered by the filtration component within the loading body for cleaning the road.

[0020] Compared with the prior art, the filtration device, water circulation system, and road cleaning equipment provided in this application have the following advantages:

[0021] 1. The inclined guide surface at the bottom of the loading body and the output port near the first end of the inclined guide surface allow the fluid to be discharged more smoothly from the output port along the inclined guide surface, thereby improving the discharge efficiency of sewage and reducing its accumulation inside the device. At the same time, the design of the first flushing unit allows it to extend into the chamber to flush the membrane module, effectively removing dirt from the membrane module, extending the service life of the membrane module, and reducing maintenance costs.

[0022] 2. The orientation of the first flushing unit is at a preset angle to the horizontal direction, which allows the flushing water flow to more effectively cover the surface of the membrane module, enhancing the flushing effect and helping to more thoroughly remove dirt and deposits from the membrane module; in addition, the first flushing unit is not aligned with the outlet, which effectively prevents sewage or sludge at the outlet from flowing back into the chamber during high-pressure flushing, ensuring the smoothness of the flushing process and the filtration effect.

[0023] 3. The bottom of the loading body is divided into two secondary bottom surfaces and one primary bottom surface, and each bottom surface has a specific deflection angle to guide the flow of sewage. The deflection angle of the secondary bottom surfaces promotes the longitudinal flow of sewage and reduces turbulence, while the deflection angle of the primary bottom surface optimizes the lateral flow, promotes the discharge of sewage, effectively improves filtration efficiency, and reduces sludge deposition.

[0024] 4. The water circulation system provided in this application uses a suction module to send the filtered wastewater back to the filter assembly for multiple filtrations, further improving water quality and ensuring the cleanliness of the clean water. Moreover, by using a circulating filtration system, the dependence on fresh water resources is reduced, and the efficiency of water resource utilization is improved. Attached Figure Description

[0025] The preferred embodiments will now be described in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of this application.

[0026] Figure 1 This is a simplified schematic diagram of the overall structure of the filtering device in one embodiment of this application;

[0027] Figure 2 This is a partial structural schematic diagram of the filtering device in one embodiment of this application;

[0028] Figure 3 This is a partial structural schematic diagram of the filtering device in one embodiment of this application from another perspective;

[0029] Figure 4 This is a schematic diagram of the structure of the loading body in one embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the structure of a cyclone separator in one embodiment of this application;

[0031] Figure 6 This is a schematic diagram of the cyclone separator in one embodiment of this application from another perspective;

[0032] Figure 7 This is a schematic diagram of the overall structure of one embodiment of this application.

[0033] Reference numerals: 1. Loading body; 10. Output port; 100. First side wall; 101. Second side wall; 102. Inclined guide surface; 103. Secondary bottom surface; 11. Main bottom surface; 12. Limiting ring; 13. Membrane module; 21. Hydrocyclone; 22. Inlet; 220. Overflow port; 221. Underflow port; 222. Limiting flange; 223. First flushing unit; 3. Waterproof electric valve; 4. Water tank; 5. Suction module; 6. Clean water storage unit; 7. Backwashing assembly; 8. Detailed Implementation

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the specific implementation methods of this application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.

[0035] To keep the drawings concise, each drawing only schematically shows the parts relevant to the application; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one."

[0036] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0037] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0039] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] With the acceleration of global urbanization, the cleanliness and maintenance of urban environments have become increasingly important. The cleanliness of city streets not only affects the city's image but also directly impacts residents' quality of life and health. As a key tool for urban sanitation, road cleaning equipment has garnered widespread attention for its efficiency and environmental performance. These devices collect large amounts of wastewater during the cleaning process, containing various impurities such as mud, grease, and fine particulate matter. To achieve water resource recycling, improve cleaning efficiency, and be environmentally responsible, it is necessary to effectively filter and treat this collected wastewater to meet standards suitable for reuse in road cleaning.

[0041] However, current filtration devices used in this field have significant shortcomings in design and performance. Many devices fail to adequately consider the smooth discharge of wastewater, leading to the accumulation of wastewater and impurities inside the device. This not only affects the operating efficiency of the device but also increases maintenance costs. Furthermore, due to poor wastewater discharge, dirt easily accumulates on the filter elements, which not only reduces filtration efficiency but may also cause premature failure of the filtration system, thereby increasing the frequency of equipment replacement and operating costs.

[0042] Therefore, please refer to the attached instruction manual. Figure 1 The filtration device provided in this application aims to improve the discharge efficiency of wastewater through optimized design, thereby enhancing filtration performance and reducing maintenance costs.

[0043] Reference manual attached Figure 1 and Figure 2 The filtration device provided in this application includes a loading body 1, a filter assembly, and a first flushing unit 3. The loading body 1 has a chamber 100 inside, and the membrane assembly 21 in the filter assembly is installed in the chamber 100 to filter impurities in the sewage. The loading body has an inlet for introducing sewage, and an outlet 10 at its bottom for discharging the fluid formed after filtration, such as sewage, sludge, or sewage-sludge mixture.

[0044] Specifically, the loading body 1 is designed with an inclined guide surface 103 at the bottom, and the outlet 10 is close to the first end of the inclined guide surface 103, which is the lowest point of the inclined guide surface 103, to ensure that the fluid can be discharged smoothly after filtration. In addition, the first flushing unit 3 is connected to the loading body 1 and extends into the chamber 100 to directly flush the membrane module 21 to maintain its filtration performance.

[0045] In this embodiment, the inclined guide surface 103 guides the sewage to the outlet 10, achieving natural drainage, which significantly improves the filtration efficiency and fluid discharge speed, and reduces fluid retention and sludge accumulation caused by improper design. At the same time, the membrane module 21 removes suspended solids and particulate matter through physical interception. The first flushing unit 3 works in conjunction to remove deposits on the surface of the membrane module 21, prevent clogging, and maintain filtration efficiency. Moreover, while providing flushing, the dynamic water flow generated by the first flushing unit 3 helps maintain the rapid flow of fluid in the chamber 100, which helps reduce the fluid's residence time in the chamber 100 and reduces the risk of sludge deposition and filter media clogging.

[0046] It should be noted that, in this embodiment, the design and material selection of the membrane module 21 are not specifically limited. In some cases, the membrane module 21 can be a ceramic membrane. The filtration principle of the ceramic membrane is mainly based on its microporous structure, achieving solid-liquid separation through physical sieving. Under pressure, water molecules and small molecules smaller than the membrane pore size in the wastewater can pass through the ceramic membrane, while larger pollutants are trapped on the membrane surface, thereby achieving efficient separation.

[0047] In a specific embodiment, a ceramic membrane module 21 is disposed within the chamber 100 of the loading body 1. Wastewater enters the chamber 100 through the inlet and is filtered by the membrane module 21. Due to the high mechanical strength and durability of the ceramic membrane, it can operate stably for a long time in harsh working environments, reducing the frequency of replacement and maintenance costs.

[0048] Furthermore, such as Figure 1 As shown, the loading body 1 includes a first sidewall 101 and a second sidewall 102. The two sidewalls are arranged parallel to each other, forming two opposite boundaries of the chamber 100. The first sidewall 101 is connected to the first end of the inclined guide surface 103, while the second sidewall 102 is connected to the second end of the inclined guide surface 103. The former is the end with the lowest horizontal height on the inclined guide surface 103, and the latter is the end with the highest horizontal height on the inclined guide surface 103.

[0049] Based on the above, in one embodiment, such as Figure 3 As shown, the first flushing unit 3 extends into the chamber 100 from the second side wall 102. Its design height is higher than the horizontal height of the outlet 10, and its position corresponds to the middle or bottom of the membrane module 21. This allows the flushing water flow to utilize gravity and pressure difference to form a flushing force from top to bottom, thereby more effectively removing the deposits and dirt in the lower middle part of the membrane module 21. Moreover, the flow of the flushing water helps to push the partially filtered wastewater towards the outlet 10, further promoting the smooth discharge of wastewater.

[0050] Understandably, in some existing filtration devices, a backwashing assembly 8 is installed above the membrane module 21 (see attached instruction manual). Figure 1 The membrane surface is rinsed with water to remove contaminants. However, this design often fails to effectively clean the bottom area of ​​the membrane module 21, leading to the accumulation of sludge and other contaminants in the lower middle part of the membrane module 21. Over time, this affects filtration efficiency and increases cleaning difficulty. This embodiment addresses these issues by using a first rinsing unit 3 that directly targets the middle or bottom of the membrane module 21, using high-pressure water to wash away sludge and dirt adhering to the membrane module 21.

[0051] In one embodiment, the outlet 10 is disposed on the first sidewall 101 and close to the inclined guide surface 103 to ensure that fluid can be smoothly discharged from the chamber 100. Moreover, the orientation of the first flushing unit 3 is at a preset angle to the horizontal direction, so that the orientation of the first flushing unit 3 and the outlet 10 are not aligned.

[0052] Understandably, when the first flushing unit 3 is aligned with the membrane module 21 at a certain angle for flushing, the impact force of the water flow acts directly on the fouled area of ​​the membrane module 21, rather than directly on the outlet 10. This arrangement reduces the direct impact of the flushing water flow on the outlet 10, thereby avoiding the risk of sewage or sludge being pushed back into the chamber 100 under high pressure. The arrangement in this embodiment effectively controls the fluid flow path by changing the direction and impact point of the water flow.

[0053] Specifically, in some cases, the first rinsing unit 3 includes a high-pressure rotating nozzle, which utilizes the rotational force generated when high-pressure water flows through the nozzle to achieve automatic rotation, thereby thoroughly cleaning the membrane module 21. The rotational power of this nozzle comes from the reaction force of the water flow through the nozzle. The nozzle inside the nozzle is designed eccentrically, so that the water flow generates rotational torque as it passes through, causing the nozzle body to rotate but the nozzle itself to rotate, thus enhancing the cleaning effect. In another embodiment, the first rinsing unit 3 also includes a water supply pipeline connected to the high-pressure rotating nozzle. One end of the water supply pipeline is connected to the high-pressure rotating nozzle, and the other end is connected to a water source, thereby achieving rinsing of the membrane module 21.

[0054] In one embodiment, the number of first rinsing units 3 is at least two. These rinsing units are arranged at uniform intervals along the width direction of the first sidewall 101 to ensure that every part of the surface of the membrane assembly 21 is rinsed uniformly, thereby improving the cleaning coverage.

[0055] Optionally, flushing units can be set at different heights of the first sidewall 101 to achieve multi-angle flushing, further improving the flushing effect and the cleanliness of the membrane module 21.

[0056] Furthermore, the number of membrane modules 21 can be adjusted accordingly. When multiple membrane modules 21 are present, they form a membrane assembly within the loading body 1 in a specific arrangement. This arrangement can be a single row with multiple columns or multiple rows with multiple columns to adapt to different filtration needs and space configurations. The membrane assembly can be designed as a single-layer or multi-layer structure to maximize space utilization and improve filtration efficiency. It should be noted that the number of membrane modules 21 can be adjusted according to actual treatment needs to meet different filtration flow rates and water quality requirements.

[0057] Specifically, by forming multiple rows or layers of membrane modules inside the loading body 1, the total surface area of ​​the membrane can be increased, thereby improving the filtration flux and treatment capacity. Also, by using some specific arrangement methods, more membrane modules 21 can be arranged in a limited space, improving the space utilization of the filtration device.

[0058] In addition, a waterproof electric valve 4 can be installed at the outlet 10. This valve can be remotely controlled to open and close via electronic signals. When it receives a command from the control system, the motor of the electric valve drives the valve to open or close, thereby controlling the flow of water. This allows the operator to control the outflow of the filtered fluid and improves the flexibility of the filtration device.

[0059] In one embodiment, based on the above embodiments, such as Figure 4 As shown, the bottom of the loading body 1 is divided into two secondary bottom surfaces 11 and one main bottom surface 12. The main bottom surface 12 is located between the two secondary bottom surfaces 11, allowing sewage to flow along a predetermined path after entering the chamber 100. The deflection angle of the two secondary bottom surfaces 11 relative to the vertical plane helps guide the longitudinal flow of sewage within the chamber 100, while the deflection angle of the main bottom surface 12 relative to the horizontal plane helps guide the lateral flow.

[0060] Specifically, through the inclined design of the sub-bottom surface 11, sewage flows downward along the sub-bottom surface 11 under the action of gravity, thus achieving longitudinal flow guidance. When the sewage flows to the main bottom surface 12, since the main bottom surface 12 is also designed with a deflection angle, the sewage will continue to flow along the main bottom surface 12 towards the outlet 10, thus achieving lateral flow guidance. By guiding the flow direction of the fluid through the inclined angle and special contour of the bottom structure of the loading body 1, the flow path of sewage in the chamber 100 is optimized, and the residence time of sewage in the chamber 100 is reduced.

[0061] Furthermore, both the secondary bottom surface 11 and the main bottom surface 12 are planar structures. In the first direction, that is, from the first end to the second end, the two secondary bottom surfaces 11 tend to expand outward away from the central axis. This means that on the side closer to the outlet 10, the relative distance between the two secondary bottom surfaces 11 is smaller, forming a gradually narrowing flow channel.

[0062] The flow velocity is increased by gradually narrowing the flow channel, thereby reducing sludge deposition at the bottom. As wastewater flows along the secondary bottom surface 11, the increased fluid velocity due to the narrowing of the channel helps push the sludge towards the outlet 10, reducing sludge deposition on the secondary bottom surface 11 and the main bottom surface 12, thus lowering cleaning frequency and maintenance costs.

[0063] The deflection angle of the main bottom surface 12 relative to the horizontal plane needs attention, generally between 10-15°, preferably around 11°. If the angle is too large, the bottom of the loading body 1 will protrude excessively outward, increasing the ineffective area. This not only affects the stability of the equipment but may also increase manufacturing costs. Conversely, if the angle is too small, the sludge flow performance will decrease, causing sludge to accumulate at the bottom, affecting the filtration effect and equipment maintenance. The deflection angle of the secondary bottom surface 11 is similar and will not be elaborated here.

[0064] In one embodiment, such as Figure 5 and Figure 6 As shown, the filter assembly also includes a hydrocyclone 22, which is fixed to the loading body 1 and has an inlet 220, an overflow 221, and a bottom outlet 222. The inlet 220 is used to receive the wastewater to be filtered, the overflow 221 is connected to the chamber 100 through an overflow pipe and is used to transport the upper clear liquid after filtration by the hydrocyclone 22, while the bottom outlet 222 is used to discharge the filtered lower wastewater or sludge.

[0065] The hydrocyclone 22 utilizes centrifugal force to pretreat wastewater. When wastewater enters the hydrocyclone 22 through the inlet 220, its internal structure causes high-speed rotation, generating centrifugal force. Lighter, clear liquid is pushed towards the center of the hydrocyclone 22 and discharged through the overflow port 221, while heavier solid particles or sludge are pushed to the periphery and discharged through the underflow port 222. Understandably, in this embodiment, pretreatment by the hydrocyclone 22 effectively removes large particles from the wastewater, reducing the filtration burden on the membrane module 21 and extending its service life.

[0066] Based on the above embodiments, such as Figure 4 As shown, a limiting ring 13 is provided on one side wall of the loading body 1, and the limiting ring 13 is located in the upper middle part of the loading body 1. A limiting flange 223 is designed on the end of the hydrocyclone 22 near the overflow port 221. During installation, the limiting ring 13 is sleeved on the outer periphery of the hydrocyclone 22 and is located below the limiting flange 223 of the hydrocyclone 22. Under the action of gravity, the limiting flange 223 of the hydrocyclone 22 abuts against the limiting ring 13, forming a stable support and fixing effect, preventing the hydrocyclone 22 from falling off during use.

[0067] It should be noted that, in one embodiment, the limiting flange 223 can be designed as a compressible or deformable structure, for example, using an elastic material or a flexible component. This allows its outer diameter to be reduced during assembly by compression or deformation, and then restored to its original shape after assembly, thereby achieving the fit between the limiting flange 223 and the limiting ring 13. In another embodiment, the limiting ring 13 can be designed as an openable form. During assembly, the limiting ring 13 is first opened, the limiting flange 223 is inserted, and then the limiting ring 13 is closed to form a stable fit. Of course, there are other embodiments as well. The accompanying drawings are only for illustrating the relative arrangement of the cyclone separator 22 and the limiting ring 13, and do not limit the specific implementation.

[0068] In one embodiment, according to another aspect of this application, this application further provides a water circulation system, which includes any of the above-described filtration devices, a water tank 5, and a suction module 6.

[0069] Reference manual attached Figure 7 The filtration device is installed inside the water tank 5. After being filtered by the filtration device, the wastewater flows into the water tank 5 for storage. One end of the suction module 6 extends into the water tank 5, and the other end is connected to the filtration component. Through this configuration, the suction module 6 draws the filtered water from the water tank 5 and pumps it back to the filtration component for cyclic filtration, thus forming a continuous cycle. By recycling the filtered water, the demand for fresh water resources is reduced, and the efficiency of water resource utilization is improved.

[0070] Optionally, an intelligent control system can also be set up in the water circulation system to automatically adjust the working state of the suction module 6 according to the water level and water quality in the water tank 5, so as to achieve more precise water circulation management. Alternatively, a multi-stage filtration system can be designed, including coarse filtration, fine filtration and ultrafiltration, to further improve water quality and meet higher water use standards.

[0071] It should be noted that the water tank 5 not only stores the liquid purified by the filter components, but also continuously collects sewage from the outside during the cleaning process of the road cleaning equipment, ensuring that the water tank 5 always has a sufficient liquid supply. At the same time, the collected sewage can be recycled again after being treated by the filter components, thus forming a dynamic balance liquid circulation system.

[0072] In one embodiment, according to another aspect of this application, this application also provides a road cleaning device, including any of the above-described filtration devices or the above-described water circulation system, and further including a cleaning component, which can be directly or indirectly connected to the loading body 1 to obtain filtered liquid in the loading body 1 for cleaning the road.

[0073] In the above description, direct connection means that the cleaning component obtains filtered liquid directly from the chamber 100 of the loading body 1 via a water supply pipeline, simplifying the system structure and reducing liquid loss during transmission; indirect connection involves an additional clean water storage unit 7 (see attached manual). Figure 7 The filtered liquid first flows into the clean water storage unit 7. When cleaning is required, the cleaning unit draws liquid from the clean water storage unit 7, so that the cleaning time and frequency can be adjusted according to actual needs. At the same time, the backwashing unit 8 mentioned above can also be connected to the clean water storage unit 7 to backwash the membrane module 21 by obtaining the clean water inside it.

[0074] In addition, the road cleaning equipment is equipped with a control system. In the case of indirect connection, when the liquid level in the clean water storage unit 7 reaches a certain level, the control system can be triggered to stop the filtration device from working, reducing energy consumption and lowering operating costs. The filtration device will only restart when the water level in the clean water storage unit 7 drops below a certain threshold, continuing to filter sewage and replenish the liquid in the clean water storage unit 7.

[0075] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A filtration device, characterized in that, For filtering wastewater in road cleaning equipment, including: The loading body has a chamber inside, and the loading body has an inlet and an outlet for the input or output of sewage relative to the chamber. The bottom of the loading body is provided with an inclined guide surface, and the outlet is close to the first end of the inclined guide surface. The first end is the end with the lowest horizontal height on the inclined guide surface, so that fluid can be discharged from the outlet along the inclined guide surface. A filtration assembly, comprising a membrane assembly disposed within the chamber for filtering wastewater; The first flushing unit is connected to the loading body and extends into the chamber for flushing the membrane assembly.

2. The filtration device according to claim 1, characterized in that, The loading body includes a first sidewall and a second sidewall, which are parallel and opposite to each other. The first sidewall is connected to the first end, and the second sidewall is connected to the second end of the inclined guide surface. The second end is the end with the highest horizontal height on the inclined guide surface. The first flushing unit extends into the chamber from the second sidewall and is correspondingly arranged with the middle or bottom of the membrane assembly to flush the middle or bottom of the membrane assembly.

3. The filtration device according to claim 2, characterized in that, The output port is located on the first sidewall and close to the inclined guide surface. The orientation of the first flushing unit is at a preset angle to the horizontal direction, and the orientation of the first flushing unit is not aligned with the output port to prevent sewage or sludge from flowing back at the output port during high-pressure flushing.

4. The filtration device according to claim 2, characterized in that, The number of the first rinsing units is at least two, and the first rinsing units are evenly arranged along the width direction of the first sidewall; And / or, The number of membrane modules is one or more. In the case of multiple membrane modules, the membrane modules form a multi-row or multi-row membrane group inside the loading body. The membrane group has one layer or multiple layers.

5. The filtration device according to any one of claims 2-4, characterized in that, The bottom of the loading body is divided into two sub-bottom surfaces and one main bottom surface. The main bottom surface is located between the two sub-bottom surfaces. The two sub-bottom surfaces have a deflection angle relative to the vertical plane to guide the longitudinal flow of sewage. The main bottom surface has a deflection angle relative to the horizontal plane to guide the lateral flow of sewage.

6. The filtration device according to claim 5, characterized in that, Both the secondary bottom surface and the main bottom surface are planar structures, and both secondary bottom surfaces expand outward in a first direction away from the central axis. The first direction is the direction from the first end to the second end.

7. The filtration device according to claim 1, characterized in that, The filtering component also includes: A hydrocyclone is used for filtration of wastewater before it passes through the membrane module. The hydrocyclone is fixed to the loading body and has an inlet, an overflow outlet, and a bottom outlet. The inlet is used to input wastewater into the hydrocyclone, the overflow port is connected to an overflow pipe to input the upper clear liquid formed by the filtration of the hydrocyclone into the chamber through the overflow pipe, and the bottom outlet is used to discharge the lower wastewater or sludge formed by the filtration of the hydrocyclone.

8. The filtration device according to claim 7, characterized in that, A limiting ring is provided on one side wall of the loading body. The limiting ring is located in the upper middle part of the loading body. A limiting flange is provided on the end of the hydrocyclone near the overflow port. The limiting ring is sleeved on the outer periphery of the hydrocyclone and located below the limiting flange, so that under the action of gravity, the limiting flange of the hydrocyclone abuts against the limiting ring to prevent the hydrocyclone from falling off.

9. A water circulation system, characterized in that, include: The filtration device according to any one of claims 1-8; The system includes a water tank and a suction module. The filtration device is located inside the water tank. One end of the suction module extends into the water tank, and the other end is connected to the filtration assembly. This allows the liquid filtered by the filtration assembly to flow into the water tank and then be pumped to the filtration assembly for further filtration via the suction module.

10. A road cleaning device, characterized in that, include: The filtration device according to any one of claims 1-8, or the water circulation system according to claim 9; A cleaning assembly, which is directly or indirectly connected to the loading body, is used to obtain liquid filtered by the filtration assembly within the loading body for cleaning the road.

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