A black ash water filtering device with self-cleaning function

Abstract

The application discloses a black ash water filtering device with a self-cleaning function, which comprises a shell, a water inlet, a water outlet and a sewage outlet are arranged on the shell. The water inlet is used for pouring the black ash water needed to be cleaned into the shell, the water outlet is used for discharging the water source filtered by the filtering device, and the sewage outlet is used for taking away the dirt adhered to the filter screen by the water flow. The filtering device further comprises a filter screen, a driving mechanism and a cleaning piece. The filter screen is arranged in the shell and is used for filtering the black ash water in the shell. The filter screen and the shell are both in a cylindrical shape, and the outer diameter of the filter screen is smaller than the diameter of the shell. In this way, the filter screen is surrounded by the unfiltered black ash water in the shell, is affected by the water pressure, penetrates outward, and thus the filtering effect is achieved. The inside of the filter screen is blocked by the solid particles contained in the black ash water for a long time, and the filtering efficiency of the filter screen is affected for a long time.

Description

Technical Field

[0001] This invention relates to the field of water filtration technology, specifically to a black and gray water filtration device with a self-cleaning function. Background Technology

[0002] In black and grey water treatment systems on ships, islands, or in remote areas, solid-liquid separation is a crucial step in removing suspended particles. Existing filtration devices mostly use fixed or rotary drum filters, where wastewater directly impacts the filter surface. Solid debris is trapped and quickly forms a filter cake, leading to decreased filtration flux and increased back pressure. Currently, manual disassembly and cleaning or the addition of backwashing pipelines are mainly relied upon. However, the former requires shutdown and operates in harsh environments, while the latter requires additional pumps and control units, increasing equipment investment and water consumption, and is particularly unfavorable in scenarios with freshwater scarcity. Some solutions use motor-driven scrapers for mechanical cleaning, but motors are prone to sealing failure and corrosion in humid, corrosive environments, resulting in poor reliability and increased energy consumption. The inlets of existing devices are often directly facing the center of the filter screen, meaning the high-speed jet can only clean a localized area, leaving the filter screen covered in scale over time, gradually reducing the effective filtration area. Summary of the Invention

[0003] The purpose of this invention is to provide a black and gray water filtration device with a self-cleaning function to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a black and grey water filtration device with self-cleaning function, comprising a housing, wherein the housing is provided with an inlet, an outlet, and a drain outlet, the inlet being used to fill the housing with black and grey water, the outlet being used to discharge the filtered water, and the drain outlet being used to discharge solid particles carried by the black and grey water, characterized in that the filtration device further comprises: A filter screen, disposed within the housing, is used to filter black and gray water within the housing; A drive mechanism is disposed in the housing and near the water inlet, and the drive mechanism is driven to rotate by the water flow gushing out of the water inlet; A cleaning component is connected to the drive mechanism. The cleaning component is driven by the drive mechanism to move up and down to clean the filter screen.

[0005] In some embodiments, the filter screen and the drive mechanism are connected by a connector, which is disposed in the housing and is used to support the filter screen and the drive mechanism; The drive mechanism is rotatable within the connector.

[0006] In some embodiments, the filter screen has a first plug at one end; The connector has a filter screen socket, and the first plug is inserted into the filter screen socket to connect the filter screen. The filter inlet includes a first limiting wall for limiting the first plug and a first supporting wall for supporting the first plug.

[0007] In some embodiments, the drive mechanism includes a wheel unit and a transmission unit, the transmission unit being inserted into the wheel unit, and the wheel unit being disposed on the connector.

[0008] In some embodiments, the wheel unit includes a support plate, a second plug is provided on the outer side of the support plate, and fan blades are provided on the inner side of the support plate; The fan blades are arranged in a circumferential array on the inner side of the support plate; All of the fan blades are connected to a support block, which is used to connect to the transmission unit.

[0009] In some embodiments, the connector is further provided with a rotating socket, the rotating socket including a second support wall for supporting the second plug and a second limiting wall for limiting the second plug; The second plug rotates in the rotating socket.

[0010] In some embodiments, the transmission unit includes a connecting rod inserted into the bearing block, and a reciprocating lead screw is connected to the connecting rod.

[0011] In some embodiments, the cleaning component has a support rod on its inner side, and the inner port of the support rod has a connecting block; The connecting block has a meshing hole that meshes with the reciprocating lead screw; The meshing hole is fitted onto the reciprocating lead screw.

[0012] In some embodiments, the support rod has a insertion hole, into which a limiting rod is inserted. One end of the limiting rod is located on the connector, and the other end is located in the inner wall of the housing.

[0013] In some embodiments, the cleaning component is driven by the reciprocating screw and moves up and down on the limiting rod; The outermost dimension of the cleaning component matches the inner dimension of the filter screen.

[0014] Compared with existing technologies, the beneficial effects of this invention are as follows: This self-cleaning black and gray water filtration device includes a housing with an inlet, an outlet, and a drain. The inlet is used to fill the housing with the black and gray water requiring cleaning, the outlet is used to discharge the water that has been filtered by the device, and the drain is used to remove dirt previously adhering to the filter screen using water flow. The filtration device also includes a filter screen, a drive mechanism, and a cleaning component. The filter screen is located inside the housing and is used to filter the black and gray water within the housing. Both the filter screen and the housing are cylindrical, and the outer diameter of the filter screen is smaller than the diameter of the housing. Thus, the filter screen is surrounded by unfiltered black and gray water inside the housing. Under the influence of water pressure, the water permeates outward, achieving a filtration effect. With prolonged use, the inside of the filter screen will become clogged by solid particles contained in the black and gray water, affecting the filtration efficiency. The filter screen is a metal mesh. The drive mechanism is located inside the housing, near the water inlet. This placement ensures that when the water to be filtered enters the filter screen, it first passes through the drive mechanism, which is then driven to rotate by the water flow from the inlet. A cleaning component is mounted on the drive mechanism and moves up and down to clean the filter screen, thus maintaining the overall cleanliness of the filter screen and ensuring its filtration efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the planing structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 This is a bottom view of the internal structure of the present invention; Figure 5 This is a top view of the internal structure of the present invention; Figure 6 This is a schematic diagram of the drive mechanism structure of the present invention; Figure 7 This is a schematic diagram of the cleaning component structure of the present invention; Figure 8 This is a schematic diagram of the connector structure of the present invention; Figure 9 This is a schematic diagram of the cut surface of the connector of the present invention.

[0016] In the diagram: 1. Outer shell; 11. Inlet; 12. Outlet; 13. Drain outlet; 2. Connector; 21. Filter screen inlet; 211. First limiting wall; 212. First support wall; 22. Rotary wheel inlet; 221. Second support wall; 222. Second limiting wall; 3. Filter screen; 31. First plug; 4. Drive mechanism; 41. Second plug; 411. Bearing; 42. Bearing plate; 43. Fan blade; 44. Bearing block; 45. Connecting rod; 46. Reciprocating screw; 5. Cleaning component; 51. Support rod; 52. Connecting block; 53. Engaging hole; 54. Limiting rod. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-9 This invention provides a technical solution: a black and gray water filtration device with self-cleaning function, including a housing 1, with an inlet 11, an outlet 12, and a drain 13. The inlet 11 is used to fill the housing 1 with the black and gray water to be cleaned; the outlet 12 is used to discharge the water that has been filtered by the filtration device; and the drain 13 is used to use water flow to remove dirt previously adhered to the filter screen 3. The filtration device also includes a filter screen 3, a drive mechanism 4, and a cleaning component 5. The filter screen 3 is disposed in the housing 1 and is used to filter the black and gray water in the housing 1. Both the filter screen 3 and the housing 1 are cylindrical, and the outer diameter of the filter screen 3 is smaller than the diameter of the housing 1. Thus, the filter screen 3 is surrounded by unfiltered black and gray water inside the housing 1. Under the influence of water pressure, it permeates outward, thereby achieving a filtration effect. With prolonged use, the interior of the filter screen 3 will become clogged by solid particles contained in the black and gray water, affecting the filtration efficiency of the filter screen 3. The filter screen 3 is a metal filter screen. The drive mechanism 4 is located inside the housing 1, near the water inlet 11. This position allows the water to be filtered to pass through the drive mechanism 4 before entering the filter screen 3. The drive mechanism 4 is driven to rotate by the water flow from the water inlet 11. The cleaning component 5 is located on the drive mechanism 4 and is moved up and down by the drive mechanism 4 to clean the filter screen 3, thereby maintaining the cleanliness of the entire interior of the filter screen 3 and thus maintaining the filtration efficiency of the filter screen 3.

[0019] Black and gray water enters the interior of the outer casing 1 through the inlet 11. It first flows through the drive mechanism 4 located near the inlet 11, and the water flow impact drives the drive mechanism 4 to rotate. Subsequently, the water flows into the filter screen 3. Because the filter screen 3 is cylindrical and its outer diameter is smaller than the inner diameter of the outer casing 1, a pressure difference is formed inside and outside the outer casing 1, causing the black and gray water to permeate from the inside of the filter screen 3 to the outside, completing solid-liquid separation. The filtered clean water gathers in the gap between the filter screen 3 and the outer casing 1, and is finally discharged from the outlet 12. At the same time, the rotation of the drive mechanism 4 drives the cleaning component 5 on it to move up and down along the inner wall of the filter screen 3, scraping off the solid dirt attached to the inner wall of the filter screen 3. The dirt that has been removed is washed down by the continuously entering unfiltered water flow and the circulating water, and is finally discharged from the outer casing 1 through the drain outlet 13. Thus, filtration and self-cleaning are carried out simultaneously and continuously.

[0020] The filter screen 3 and the drive mechanism 4 are both connected by the connector 2, which is located in the housing 1. The connector 2 ensures the installation of the filter screen 3 and allows the drive mechanism 4 to rotate within it. The connector 2 supports both the filter screen 3 and the drive mechanism 4. The drive mechanism 4 can rotate within the connector 2.

[0021] The filter screen 3 has a first plug 31 at one end. The connector 2 has a filter screen socket 21, and the first plug 31 is inserted into the filter screen socket 21 for connecting the filter screen 3. The outer dimensions of the first plug 31 match the inner dimensions of the filter screen socket 21. The filter screen socket 21 includes a first limiting wall 211 for limiting the first plug 31 and a first supporting wall 212 for supporting the first plug 31. The first limiting wall 211 prevents deformation and displacement in the connector 2 when the filter screen 3 is subjected to excessive water pressure, while the first supporting wall 212 supports the entire filter screen 3 to prevent it from falling off due to weight change after hooking solid particles. There are two connectors 2, which are connected to the upper and lower sides inside the outer shell 1 respectively. The lower connector 2 is connected to the filter screen 3 and the drive mechanism 4, while the upper connector 2 is only connected to the filter screen 3. Both the upper and lower connectors 2 are sealed to the outer shell 1 to ensure that the black and gray water to be filtered enters the filter screen 3 and the filtered black and gray water is discharged from between the filter screen 3 and the outer shell 1.

[0022] The black and gray water enters the interior of the outer casing 1 through the inlet 11, first impacting the drive mechanism 4 located near the inlet 11. This drive mechanism 4 rotates under the support of two connecting parts 2. The upper connecting part 2 supports both the filter screen 3 and the drive mechanism 4, while the lower connecting part 2 only supports the filter screen 3. The water then flows into the cylindrical filter screen 3. Because the outer diameter of the filter screen 3 is smaller than the inner diameter of the outer casing 1, a pressure difference is created, causing the black and gray water to permeate from the inside out, completing solid-liquid separation. The clean water collects in the gap between the filter screen 3 and the outer casing 1 and is discharged from the outlet 12. During the filtration process, the filter screen 3 passes through a first connecting part 2 at one end... The plug 31 is inserted into the filter screen socket 21 on the connector 2 for fixed installation. The first limiting wall 211 inside the filter screen socket 21 axially limits the filter screen 3 when it is subjected to water pressure impact to prevent deformation and displacement. The first supporting wall 212 supports the filter screen 3 when its weight increases due to intercepting solid particles to prevent it from falling off. At the same time, the drive mechanism 4 rotates and drives the cleaning component 5 to move up and down along the inner wall of the filter screen 3 to scrape off the attached solid dirt. The dirt after being peeled off is flushed down with the continuously entering water flow and finally discharged from the drain port 13 into the outer shell 1, thereby realizing the synchronous and continuous operation of filtration and self-cleaning.

[0023] The drive mechanism 4 includes a wheel unit and a transmission unit. The transmission unit is inserted into the wheel unit, which is mounted on the connecting member 2. The wheel unit drives the transmission unit to rotate, and the transmission unit drives the cleaning member 5 to move.

[0024] The wheel unit includes a support plate 42, which serves as the outer shell of the wheel unit. A second plug 41 is located on the outer side of the support plate 42, used to snap the wheel unit into the connector 2. Fan blades 43 are located on the inner side of the support plate 42, used to receive the impact velocity of the water flow. The fan blades 43 are arranged in a circumferential array on the inner side of the support plate 42. A support block 44 is connected to all the fan blades 43, used for connection to the transmission unit.

[0025] Black and gray water enters the interior of the outer casing 1 through the inlet 11, first impacting the wheel unit in the drive mechanism 4. The water flow impacts the fan blades 43 arranged in a circular array on the inner side of the support plate 42, using the kinetic energy of the water to drive the support plate 42 to rotate in the connector 2. The second plug 41 on the outer side of the support plate 42 is engaged in the connector 2, providing rotational support for the wheel unit. All the fan blades 43 converge and connect to the central support block 44, transmitting the rotational power through the support block 44 to the transmission unit inserted thereon. The transmission unit then actuates, converting the rotational motion of the wheel unit into linear reciprocating motion, driving the cleaning component 5 to move up and down along the inner wall of the filter screen 3, scraping off the attached solid dirt. At the same time, the water flow enters the interior of the cylindrical filter screen 3, and under the action of the internal and external pressure difference, it permeates from the inside to the outside to complete solid-liquid separation. The clean water gathers between the filter screen 3 and the outer casing 1 and is discharged from the outlet 12. The scraped dirt is washed down with the continuously entering water flow and finally discharged from the drain outlet 13, realizing the synchronous and continuous operation of filtration and self-cleaning.

[0026] The connector 2 also has a rotary socket 22, which includes a second support wall 221 for supporting the second plug 41 and a second limiting wall 222 for limiting the position of the second plug 41. The second plug 41 rotates within the rotary socket 22. Bearings 411 are provided at the end and bottom of the second plug 41. The bearings 411 are in close contact with the second support wall 221 and the second limiting wall 222, and the bearings 411 can reduce the friction between the second plug 41 and the rotary socket 22. The remaining parts do not contact the rotary socket 22, avoiding unnecessary friction. This improves the drive conversion efficiency of the drive mechanism 4.

[0027] Black and gray water enters the interior of the outer casing 1 through the inlet 11, first impacting the fan blades 43 of the wheel unit in the drive mechanism 4, driving the bearing plate 42 to rotate. The second plug 41 on the outer side of the bearing plate 42 is inserted into the wheel socket 22 on the connector 2 and rotates freely therein. The end and bottom of the second plug 41 are provided with bearings 411. The bearings 411 are in close contact with the second support wall 221 and the second limiting wall 222 of the wheel socket 22, respectively supporting and axially limiting the second plug 41. The rest of the second plug 41, except for the bearings 411, maintains a non-contact gap with the wheel socket 22, thereby greatly reducing rotational friction loss and increasing the kinetic energy of the water flow. The mechanical energy conversion efficiency; all fan blades 43 converge and connect to the central support block 44, which transmits the rotational power to the transmission unit inserted thereon. The transmission unit then converts the rotational motion into linear reciprocating motion, driving the cleaning component 5 to move up and down along the inner wall of the filter screen 3 to scrape off the attached solid dirt; at the same time, water flows into the interior of the cylindrical filter screen 3, and under the action of the internal and external pressure difference, it permeates from the inside to the outside to complete the solid-liquid separation. The clean water gathers between the filter screen 3 and the outer shell 1 and is discharged from the outlet 12. The scraped dirt is washed down with the continuously flowing water and finally discharged from the drain outlet 13, realizing the synchronous and continuous operation of filtration and self-cleaning.

[0028] The transmission unit includes a connecting rod 45 inserted into the bearing block 44, and a reciprocating screw 46 connected to the connecting rod 45. The reciprocating screw 46 is connected to the cleaning component 5, and the reciprocating screw 46 is selected to be fully adapted to the application of the unidirectional rotation of the wheel unit. The reciprocating screw 46 absorbs the rotational driving force of the wheel unit, thereby driving the cleaning component 5 to move up and down on the reciprocating screw 46.

[0029] Black and gray water enters the interior of the outer casing 1 through the inlet 11, first impacting the fan blades 43 of the wheel unit, driving the bearing plate 42 to rotate. The rotational power is transmitted through the bearing block 44 at the center of the bearing plate 42 to the connecting rod 45 inserted thereon. The connecting rod 45 drives the reciprocating screw 46 connected thereon to rotate synchronously. Since the reciprocating screw 46 itself has a spiral guide groove structure, it is perfectly adapted to the continuous rotational input of the wheel unit in one direction, and can convert the continuous rotational motion into the cleaning component 5 that works with it to reciprocate along the axial direction of the reciprocating screw 46, that is, to realize the cleaning component 5 inside the filter screen 3. The reciprocating motion scrapes away solid dirt adhering to the inner wall of the filter screen 3. At the same time, water flows into the interior of the cylindrical filter screen 3 and, under the action of the internal and external pressure difference, permeates from the inside to the outside to complete solid-liquid separation. Clean water gathers between the filter screen 3 and the outer shell 1 and is discharged from the outlet 12. The scraped dirt is washed away by the continuously flowing water and finally discharged from the drain outlet 13. In the whole process, the unidirectional rotation of the drive mechanism 4 is efficiently converted into the reciprocating stroke of the cleaning component 5 by the reciprocating screw 46. Continuous reciprocating cleaning can be achieved without the need for a reversing mechanism, ensuring that filtration and self-cleaning operate synchronously and continuously.

[0030] The cleaning component 5 has a support rod 51 on its inner side, and a connecting block 52 is provided at the inner end of the support rod 51. The connecting block 52 is used to connect all the support rods 51 into one piece. The support rods 51 are used to support the interior of the cleaning component 5 to ensure that the cleaning component 5 will not deform due to uneven force when cleaning the filter screen 3. The connecting block 52 has a meshing hole 53 that meshes with the reciprocating screw 46. The meshing hole 53 is sleeved on the reciprocating screw 46 and meshes with it.

[0031] The support rod 51 has a plug hole, into which a limit rod 54 is inserted. This ensures that the cleaning part 5 can move up and down on the limit rod 54 while being limited, ensuring that the cleaning part 5 does not rotate synchronously with the rotation of the reciprocating screw 46. The threads on the outside of the reciprocating screw 46 and inside the meshing hole 53 allow the cleaning part 5 to move up and down on the limit rod 54 according to the rotation of the reciprocating screw 46. The cleaning part 5 is used to scrape and clean the inner wall of the filter screen 3. One end of the limit rod 54 is located on the connector 2, and the other end is located in the inner wall of the outer shell 1.

[0032] The cleaning component 5 is driven by the reciprocating screw 46 and moves up and down on the limit rod 54. The outermost dimension of the cleaning component 5 matches the inner dimension of the filter screen 3. Thus, the up and down movement of the cleaning component 5 scrapes and cleans the inner wall of the filter screen 3.

[0033] Driven by the wheel unit, the reciprocating screw 46 rotates continuously. The cleaning component 5 is sleeved onto the reciprocating screw 46 and meshes with it through the engagement hole 53 on the connecting block 52 at the end of its inner support rod 51. At the same time, a limiting rod 54 is inserted into the insertion hole on the support rod 51. One end of the limiting rod 54 is fixed to the connecting component 2, and the other end is fixed to the inner wall of the outer shell 1, thus circumferentially limiting the cleaning component 5. Since the limiting rod 54 prevents the cleaning component 5 from rotating synchronously with the reciprocating screw 46, the continuous rotation of the reciprocating screw 46 is achieved through the threaded engagement between the inner wall of the engagement hole 53 and the outer wall of the reciprocating screw 46. The cleaning component 5 moves up and down along the axis of the limiting rod 54. The cleaning component 5 has an overall ring structure that matches the inner wall of the filter screen 3. Its outermost dimension is adapted to the inner dimension of the filter screen 3. During the up and down movement, it cleans the inner wall of the filter screen 3 by scraping. The connecting block 52 connects all the support rods 51 into one unit. Each support rod 51 provides multi-point support to the cleaning component 5 from the inside, ensuring that the force distribution of the cleaning component 5 is uniform during scraping and cleaning. This avoids deformation or tilting due to excessive local resistance, ensuring the stability of the cleaning action and the full coverage cleaning effect on the inner wall of the filter screen 3.

[0034] When the self-cleaning black and gray water filtration device is in use, the black and gray water enters the interior of the outer casing 1 through the inlet 11 and first impacts the wheel unit in the drive mechanism 4 located near the inlet 11. The fan blades 43 arranged in a circumferential array on the inner side of the support plate 42 receive the kinetic energy of the water flow and drive the support plate 42 to rotate on the connector 2. The second plug 41 on the outer side of the support plate 42 is inserted into the wheel socket 22 on the connector 2. The bearings 411 at the end and bottom of the second plug 41 are in close contact with the second support wall 221 and the second limiting wall 222 of the wheel socket 22, respectively achieving support and axial limiting. The rest of the second plug 41, except for the bearing 411, maintains a non-contact gap with the wheel socket 22, thereby greatly reducing rotational friction loss and improving the conversion efficiency of water kinetic energy into mechanical energy.

[0035] All fan blades 43 converge and connect to the central support block 44, transmitting rotational power through the support block 44 to the connecting rod 45 inserted thereon. The connecting rod 45 drives the reciprocating screw 46 connected thereon to rotate synchronously. At the same time, the water flows around the drive mechanism 4 and enters the cylindrical filter screen 3. Because the outer diameter of the filter screen 3 is smaller than the inner diameter of the outer shell 1, a pressure difference is formed between the inside and outside, causing the black and gray water to permeate from the inside of the filter screen 3 to the outside, completing the solid-liquid separation. The clean water gathers in the gap between the filter screen 3 and the outer shell 1 and is finally discharged from the outlet 12.

[0036] While filtration is in progress, the cleaning component 5 is sleeved onto the reciprocating screw 46 through the meshing hole 53 on the connecting block 52 at the end of its inner support rod 51 and meshes with it. A limit rod 54 is inserted into the insertion hole on the support rod 51. One end of the limit rod 54 is fixed to the connecting component 2 and the other end is fixed to the inner wall of the outer shell 1, forming a circumferential limit on the cleaning component 5. Since the limit rod 54 prevents the cleaning component 5 from rotating synchronously with the reciprocating screw 46, the continuous rotation of the reciprocating screw 46 is converted into the up-and-down reciprocating movement of the cleaning component 5 along the axis of the limit rod 54 through the threaded engagement between the inner wall of the meshing hole 53 and the outer wall of the reciprocating screw 46. Throughout the process, the reciprocating screw 46 is fully adapted to the continuous rotation of the wheel unit in one direction, and continuous reciprocating cleaning can be achieved without a reversing mechanism.

[0037] The cleaning component 5 has an overall ring structure, and its outermost dimension is adapted to the inner dimension of the filter screen 3. During the up and down movement, it evenly scrapes and cleans the inner wall of the filter screen 3. The connecting block 52 connects all the support rods 51 into one unit. Each support rod 51 provides multi-point support to the cleaning component 5 from the inside, ensuring that the force distribution of the cleaning component 5 is even during scraping and cleaning, and avoiding deformation or tilting due to excessive local resistance.

[0038] During the filtration process, the filter screen 3 is fixedly installed by inserting its first plug 31 into the filter screen socket 21 on the connector 2. The upper and lower connectors 2 are respectively connected to the upper and lower sides inside the outer casing 1. The upper connector 2 supports both the filter screen 3 and the drive mechanism 4, while the lower connector 2 only supports the filter screen 3. The first limiting wall 211 inside the filter screen socket 21 axially limits the filter screen 3 when it is subjected to water pressure, preventing deformation and displacement. The first support wall 212 supports the filter screen 3 when its weight increases due to the interception of solid particles, preventing it from falling off. The detached dirt is flushed down with the continuously flowing unfiltered water and finally discharged from the outer casing 1 through the drain port 13, thus achieving synchronous and continuous operation of filtration and self-cleaning.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A black and grey water filtration device with self-cleaning function, comprising a housing (1), wherein the housing (1) is provided with an inlet (11), an outlet (12), and a drain (13), wherein the inlet (11) is used to fill the housing (1) with black and grey water, the outlet (12) is used to discharge the filtered water, and the drain (13) is used to discharge solid particles carried by the black and grey water, characterized in that, The filtration device also includes: A filter screen (3) is disposed in the outer casing (1) for filtering black and gray water in the outer casing (1); The drive mechanism (4) is located in the housing (1) and near the water inlet (11). The drive mechanism (4) is driven to rotate by the water flow from the water inlet (11). Cleaning component (5) is connected to the driving mechanism (4). The cleaning component (5) is driven by the driving mechanism (4) to move up and down to clean the filter screen (3).

2. The black and gray water filtration device with self-cleaning function according to claim 1, characterized in that: The filter screen (3) and the drive mechanism (4) are connected by a connector (2), which is located in the outer shell (1) and is used to support the filter screen (3) and the drive mechanism (4). The drive mechanism (4) is rotatable in the connector (2).

3. A black and gray water filtration device with self-cleaning function according to claim 2, characterized in that: The filter screen (3) has a first plug (31) at one end; The connector (2) has a filter screen socket (21), and the first plug (31) is inserted into the filter screen socket (21) to connect the filter screen (3); The filter inlet (21) includes a first limiting wall (211) for limiting the first plug (31) and a first support wall (212) for supporting the first plug (31).

4. A black and gray water filtration device with self-cleaning function according to claim 2, characterized in that: The drive mechanism (4) includes a wheel unit and a transmission unit. The transmission unit is inserted into the wheel unit, and the wheel unit is disposed on the connector (2).

5. A black and gray water filtration device with self-cleaning function according to claim 4, characterized in that: The wheel unit includes a support plate (42), a second plug (41) is provided on the outer side of the support plate (42), and a fan blade (43) is provided on the inner side of the support plate (42). The fan blades (43) are arranged in a circumferential array on the inner side of the support plate (42); All of the fan blades (43) are connected to a support block (44), which is used to connect to the transmission unit.

6. A black and gray water filtration device with self-cleaning function according to claim 5, characterized in that: The connector (2) is also provided with a rotary socket (22), which includes a second support wall (221) for supporting the second plug (41) and a second limiting wall (222) for limiting the second plug (41). The second plug (41) rotates in the rotating socket (22).

7. A black and gray water filtration device with self-cleaning function according to claim 5, characterized in that: The transmission unit includes a connecting rod (45) inserted into the bearing block (44), and a reciprocating screw (46) is connected to the connecting rod (45).

8. A black and gray water filtration device with self-cleaning function according to claim 7, characterized in that: The cleaning component (5) has a support rod (51) on its inner side, and the internal port of the support rod (51) has a connecting block (52). The connecting block (52) has a meshing hole (53) that meshes with the reciprocating screw (46). The meshing hole (53) is fitted onto the reciprocating lead screw (46).

9. A black and gray water filtration device with self-cleaning function according to claim 8, characterized in that: The support rod (51) has a plug hole, and a limiting rod (54) is inserted into the plug hole. One end of the limiting rod (54) is located on the connector (2), and the other end is located in the inner wall of the outer shell (1).

10. A black and gray water filtration device with self-cleaning function according to claim 9, characterized in that: The cleaning component (5) is driven by the reciprocating screw (46) and moves up and down on the limiting rod (54); The outermost dimension of the cleaning component (5) matches the inner dimension of the filter screen (3).

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