Filtering equipment and working method thereof

Abstract

The invention discloses filtering equipment and a working method thereof. The filtering equipment comprises a shell and a multi-stage filtering part arranged in the shell, the multi-stage filtering part comprises a sleeve assembly, the sleeve assembly comprises a flowing pipe arranged in the shell, a grinding roller located in the flowing pipe and a driving shaft inserted into the grinding roller, and the flowing pipe is provided with a backflow port, a water inlet and an inner cavity drain outlet; the multi-stage filtering part comprises a first-stage filtering part and a second-stage filtering part which are arranged on the flowing pipe in a sleeving manner, and a third-stage filtering part which is arranged on the second-stage filtering part in a sleeving manner and is fixed on the flowing pipe; the second-stage filtering piece is sleeved on the first-stage filtering piece; the backflow port is communicated with the secondary filtering piece, and a blocking hinge is hinged to the backflow port on the inner wall of the flowing pipe. Through the design of a backflow port of the sleeve assembly and a blocking hinge, when entering, water firstly passes through the first-stage filtering piece, then passes through the second-stage filtering piece and then passes through the third-stage filtering piece to be filtered step by step, when sewage is discharged, the sewage can be independently discharged, and sewage discharging is completed on the premise that the filtering work is not affected.

Description

Technical Field

[0001] The invention relates to the field of environmental protection, in particular to a filtering device and a working method thereof. Background Art

[0002] As the steel industry continues to develop, water treatment is also constantly reforming.

[0003] The conventional chemical degreasing device combined with the inclined plate sedimentation tank used in the original turbid water treatment process has the disadvantages of large floor space, large system investment, the need to add a water storage tank and a secondary lift pump, and high energy consumption; at the same time, it also increases the number of operators;

[0004] Therefore, in order to save energy and improve economic benefits, the original conventional design of chemical deoiler and inclined plate sedimentation was reformed into a pressure mixed filtration and sedimentation process (commonly known as pressure integration).

[0005] However, when in use, it is generally divided into multi-stage filtration (three stages are the most common), and the filter elements of the multi-stage filtration are nested layer by layer. Although this nesting method makes the filtering effect better, after long-term use, even if the multi-stage filter elements are cleaned by backwashing, since the secondary filter element is nested on the primary filter element, and the tertiary filter element is nested on the secondary filter element, when the secondary filter element is backwashed, the impurities are blocked by the tertiary filter element and the primary filter element, and effective backwashing cleaning work cannot be completed, resulting in more impurities attached to the secondary filter element, affecting the filtering effect, and gradually affecting the work of the primary and tertiary filters. Summary of the invention

[0006] Purpose of the invention: to provide a filtering device and a working method thereof to solve the above-mentioned problems existing in the prior art.

[0007] Technical solution: A filtering device, comprising:

[0008] A housing, and a multi-stage filter disposed in the housing;

[0009] The multi-stage filtration unit comprises:

[0010] The casing assembly comprises a flow pipe arranged in the housing, a rolling roller located in the flow pipe, and a drive shaft plugged into the rolling roller, wherein the flow pipe is provided with a reflux port, a water inlet port and an inner cavity sewage outlet;

[0011] A multi-stage filter element, comprising a primary filter element sleeved on the flow tube, a secondary filter element, and a tertiary filter element sleeved on the secondary filter element and fixed on the flow tube;

[0012] The secondary filter element is sleeved on the primary filter element;

[0013] The reflux port is in communication with the secondary filter element, and a blocking hinge is hingedly connected to the inner wall of the flow tube at the reflux port;

[0014] The bottom of the three-stage filter element is connected with an outer cavity sewage pipe extending to the outside of the shell.

[0015] The design of the reflux port and the blocking hinge of the casing assembly ensures that when water enters, it is first filtered through the primary filter element, then the secondary filter element, and then the tertiary filter element step by step. When sewage is discharged, it can be discharged separately, completing the simultaneous sewage discharge without affecting the filtering work.

[0016] The present invention completes the filtering work of the water body by designing a multi-stage filter part. At the same time, separate sewage outlets are designed for the primary filter element, the secondary filter element and the tertiary filter element, so that the secondary pollution of the internal water body is reduced during sewage discharge.

[0017] The sleeve assembly is designed to drive the primary filter and the secondary filter to perform reverse water washing, so that the self-cleaning effect of the primary filter and the secondary filter is better. The design of the sleeve assembly is linked with the primary filter and the secondary filter, while not affecting the separate sewage discharge work of the primary filter, the secondary filter and the tertiary filter;

[0018] At the same time, a rolling roller is designed to prevent large particles of impurities in the water from clogging the filter element.

[0019] In a further embodiment, one end of the flow tube is closed, an elliptical chamber is opened in the flow tube, a movable slide groove is opened on the inner wall of the flow tube, a gear rack is installed at the end of the flow tube, and a transmission gear is sleeved on the end of the gear rack.

[0020] In a further embodiment, the rolling roller is hollow, a roller gear ring is installed inside, and rotating sealing rings adapted to the driving shaft are installed at both ends;

[0021] The outer wall of the rolling roller is provided with a rolling wall, and the top of the rolling roller is provided with a sliding frame adapted to the movable sliding groove.

[0022] The roller wall abuts against the inner wall of the elliptical chamber. When the roller rotates, the roller wall will intermittently contact the elliptical chamber of the flow tube to crush large particles of impurities in the water body, thereby preventing large particles from clogging the filter element.

[0023] The slide is designed to prevent the driving shaft from driving the rolling roller upwards when it moves upwards. The slide and the movable chute are designed to allow the rolling roller to rotate in the flow tube.

[0024] In order to make the rotation smoother, balls can be embedded in the slide to reduce the friction area.

[0025] It can also be achieved through bearings, but there will be problems with the service life of bearings soaking in water with impurities. It can be achieved by designing a rotating sealing ring mounted on the rolling roller near the bottom of the flow tube, dividing the flow tube into two upper and lower chambers, and designing a bearing mounted on the rolling roller in the lower chamber.

[0026] In a further embodiment, a secondary drive gear, a primary drive gear, a roller drive gear and an output gear are sequentially mounted on the drive shaft;

[0027] The secondary driving gear is meshed with the transmission gear, and the roller driving gear is meshed with the roller gear ring.

[0028] In a further embodiment, a lifting cylinder and a driving motor are mounted on the bottom of the housing, and an output end of the lifting cylinder is connected to a driving shaft;

[0029] The output end of the driving motor is sleeved with an input gear meshing with the output gear.

[0030] In a further embodiment, the primary filter element, the secondary filter element, and the tertiary filter element have predetermined shapes;

[0031] The inner wall of the primary filter element is provided with a primary filter gear ring meshing with the primary drive gear;

[0032] A secondary filter gear ring meshing with a transmission gear is installed on the top of the inner wall of the secondary filter element.

[0033] The primary filter element, the secondary filter element and the tertiary filter element are made of filter materials and may include filter cotton, filter mesh or other filter media.

[0034] The bottom of the first-stage filter element is sealed, the top of the second-stage filter element is sealed, and the bottom of the third-stage filter element is sealed.

[0035] In a further embodiment, a bilge is installed at the bottom of the shell, the bilge is connected to an in-cabin sewage pipe extending to the outside of the shell, and an in-cabin sewage valve is provided on the in-cabin sewage pipe;

[0036] Multiple layers of honeycomb filter filling layers are installed on the top of the shell.

[0037] In a further embodiment, the water inlet is connected to a water inlet pipe extending outside the housing, and the water inlet pipe is provided with a water pump;

[0038] The inner cavity sewage outlet is connected with an inner cavity sewage pipe extending to the outside of the shell, and the inner cavity sewage pipe is provided with an inner cavity sewage valve.

[0039] In a further embodiment, the water inlet pipe is externally connected to a sedimentation tank, and the external cavity sewage pipe is provided with an external cavity sewage valve.

[0040] A working method, comprising: a filtering method and a cleaning method;

[0041] The filtering method comprises:

[0042] Step 11: During filtration, the water in the sedimentation tank is pumped into the water inlet pipe through the water pump, enters the flow pipe through the water inlet, and enters the primary filter element, the secondary filter element, and the tertiary filter element for filtration. As the water body gradually increases, the water level in the shell continues to rise, and is filtered again through the honeycomb filter filling layer and is led out to the designated location through the water storage port;

[0043] Step 12: During step 11, water continues to exist in the flow tube, which is in a positive pressure state. The blocking hinge is attached to the inner wall of the flow tube, and the water passes through the primary filter element, then enters the secondary filter element, and finally enters the tertiary filter element;

[0044] Step 13, during step 11, the input gear is driven to rotate by the driving motor, the output gear is driven to rotate, the driving shaft is driven to rotate, the roller driving gear is driven to rotate, the roller gear ring is driven to rotate, the rolling roller is driven to rotate, and the rolling wall is driven to intermittently contact with the elliptical chamber, thereby rolling large particles of impurities in the water body and rolling the large particles of impurities into small particles of impurities;

[0045] In the filtering method, corresponding reagents can be added to increase the filtering and sedimentation effects.

[0046] The cleaning method comprises:

[0047] Step 21, when cleaning, turn off the water pump and cut off the flow of the water inlet pipe. At this time, there is water in the shell, and the lifting cylinder works to drive the drive shaft to rise, drive the roller drive gear, the first-level drive gear, and the second-level drive gear to rise, so that the roller drive gear is separated from the roller gear ring, and the first-level drive gear and the second-level drive gear are respectively meshed with the first-level filter gear ring and the second-level filter gear ring;

[0048] Step 22, the input gear is driven to rotate by the driving motor, the output gear is driven to rotate, the driving shaft is driven to rotate, and the primary filter element and the secondary filter element are driven to rotate in the opposite direction, so that the primary filter element and the secondary filter element are self-cleaned in the water body. At the same time, the rotation of the secondary filter element will cause the water body between the tertiary filter element and the secondary filter element to be disturbed, and the inner wall of the tertiary filter element is cleaned;

[0049] Step 23, open the inner cavity drain valve and the outer cavity drain valve, the water between the secondary filter element and the primary filter element flushes the blocking hinge, the sewage and impurities between the secondary filter element and the primary filter element are discharged into the flow pipe through the reflux port, discharged into the inner cavity drain pipe through the inner cavity drain port, and then discharged out of the shell;

[0050] The water at the inner wall of the primary filter element is directly discharged into the flow pipe and then discharged out of the shell;

[0051] The water between the third-stage filter element and the second-stage filter element is discharged to the outside of the shell through the external cavity sewage pipe;

[0052] Step 24: After the water between the primary filter element, the secondary filter element, and the tertiary filter element is drained, the sewage valve in the cabin is opened to drain the water at the bottom of the shell;

[0053] In this way, water with impurities on the inner wall of the primary filter element, between the primary filter element and the secondary filter element, and between the secondary filter element and the tertiary filter element can be discharged separately, reducing the impurities on the inner wall of the secondary filter element from attaching to the outer wall of the primary filter element again, and the impurities on the inner wall of the tertiary filter element from attaching to the outer wall of the secondary filter element;

[0054] During the cleaning process, when the water is insufficient, water is introduced from the outside, and the water is introduced into the shell through the water outlet, and the cleaning is achieved through an external pump body and water source.

[0055] Beneficial effects: The present invention discloses a filtering device and a working method thereof. The present invention completes the filtering work of the water body by designing a multi-stage filtering part. At the same time, separate sewage outlets are designed for the primary filtering element, the secondary filtering element and the tertiary filtering element, so that the secondary pollution of the internal water body is reduced during sewage discharge.

[0056] The sleeve assembly is designed to drive the primary filter and the secondary filter to perform reverse water washing, so that the self-cleaning effect of the primary filter and the secondary filter is better. The design of the sleeve assembly is linked with the primary filter and the secondary filter, while not affecting the separate sewage discharge work of the primary filter, the secondary filter and the tertiary filter;

[0057] At the same time, a rolling roller is designed to prevent large particles of impurities in the water from clogging the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 It is a structural schematic diagram of the present invention.

[0059] Figure 2 It is a schematic diagram of the structure of the multi-stage filter unit of the present invention.

[0060] Figure 3 It is a schematic diagram of the structure of the first, second and third stage filter elements of the present invention.

[0061] Figure 4 It is a schematic diagram of the cross-sectional structure of the multi-stage filter unit of the present invention.

[0062] Figure 5 It is a schematic diagram of the structure of the parts of the multi-stage filter unit of the present invention.

[0063] Figure 6 It is a schematic diagram of the cross-sectional structure of the components of the multi-stage filter unit of the present invention.

[0064] The accompanying drawings are marked as follows:

[0065] 1. Shell; 11. Honeycomb filter filling layer; 12. Water outlet; 13. Bilge bottom; 14. In-cabin sewage pipe;

[0066] 2. Multi-stage filter unit; 21. Primary filter element; 211. Primary filter tooth ring; 22. Secondary filter element; 221. Secondary filter tooth ring; 23. Third-stage filter element;

[0067] 24, flow pipe; 241, gear rack; 242, transmission gear; 243, return port; 243A, blocking hinge; 244, water inlet; 245, inner cavity sewage outlet; 246, movable chute;

[0068] 25, rolling roller; 251, carriage; 252, rolling wall; 253, roller body gear ring; 254, rotary sealing ring;

[0069] 26, driving shaft; 261, secondary driving gear; 262, primary driving gear; 263, roller driving gear; 264, output gear; 265, lifting cylinder; 266, driving motor; 267, input gear;

[0070] 31. External cavity sewage pipe; 32. Water inlet pipe; 33. Internal cavity sewage pipe. DETAILED DESCRIPTION

[0071] The present application relates to a filtering device and a working method thereof, which are explained in detail below through specific implementation methods.

[0072] A filtering device, comprising:

[0073] A housing 1, and a multi-stage filter unit 2 arranged in the housing 1;

[0074] The multi-stage filter unit 2 comprises:

[0075] The casing assembly includes a flow pipe 24 disposed in the housing 1, a rolling roller 25 located in the flow pipe 24, and a drive shaft 26 plugged into the rolling roller 25. The flow pipe 24 is provided with a return port 243, a water inlet 244, and an inner cavity sewage outlet 245;

[0076] One end of the flow tube 24 is closed, an elliptical chamber is opened in the flow tube 24, a movable slide groove 246 is opened on the inner wall of the flow tube 24, a gear rack 241 is installed at the end of the flow tube 24, and a transmission gear 242 is sleeved on the end of the gear rack 241.

[0077] The rolling roller 25 is hollow, with a roller gear ring 253 installed inside, and rotating sealing rings 254 adapted to the driving shaft 26 installed at both ends;

[0078] The outer wall of the rolling roller 25 is provided with a rolling wall 252 , and the top thereof is provided with a slide frame 251 adapted to the movable slide groove 246 .

[0079] The rolling wall 252 abuts against the inner wall of the elliptical chamber. When the rolling roller 25 rotates, the rolling wall 252 intermittently contacts the elliptical chamber of the flow tube 24 to crush large particles of impurities in the water body, thereby preventing large particles from clogging the filter element.

[0080] The slide 251 is designed to prevent the driving shaft 26 from driving the rolling roller 25 upward when the driving shaft 26 moves upward. The slide 251 and the movable slide 246 are designed to allow the rolling roller 25 to rotate in the flow tube 24.

[0081] In order to make the rotation smoother, balls may be embedded in the slide 251 to reduce the friction area.

[0082] It can also be achieved through bearings, but there will be problems with the service life of the bearings if they are soaked in water with impurities. It can be achieved by designing a rotating sealing ring mounted on the rolling roller 25 near the bottom of the flow tube 24, dividing the flow tube 24 into two upper and lower chambers, and designing a bearing mounted on the rolling roller 25 in the lower chamber.

[0083] The driving shaft 26 is provided with a secondary driving gear 261, a primary driving gear 262, a roller driving gear 263 and an output gear 264 in sequence;

[0084] The secondary driving gear 261 is meshed with the transmission gear 242 , and the roller driving gear 263 is meshed with the roller gear ring 253 .

[0085] A lifting cylinder 265 and a driving motor 266 are installed at the bottom of the housing 1, and the output end of the lifting cylinder 265 is connected to the driving shaft 26;

[0086] An output end of the driving motor 266 is sleeved with an input gear 267 meshing with the output gear 264 .

[0087] The multi-stage filter element includes a primary filter element 21 sleeved on the flow tube 24, a secondary filter element 22, and a tertiary filter element 23 sleeved on the secondary filter element 22 and fixed on the flow tube 24;

[0088] The secondary filter element 22 is sleeved on the primary filter element 21;

[0089] The reflux port 243 is in communication with the secondary filter element 22 , and a blocking hinge 243A is hingedly connected to the inner wall of the flow tube 24 at the reflux port 243 ;

[0090] The bottom of the third-stage filter element 23 is connected to an outer cavity sewage pipe 31 extending to the outside of the shell 1.

[0091] The design of the return port 243 and the blocking hinge 243A of the sleeve assembly allows the water to be filtered step by step through the primary filter element 21, the secondary filter element 22, and the tertiary filter element 23 when entering. When the sewage is discharged, the sewage can be discharged separately, completing the simultaneous sewage discharge without affecting the filtering work.

[0092] The present invention completes the filtering work of the water body by designing a multi-stage filter part 2. At the same time, separate sewage outlets are designed for the primary filter element 21, the secondary filter element 22 and the tertiary filter element 23, so that secondary pollution of the internal water body is reduced during sewage discharge.

[0093] The sleeve assembly is designed to drive the primary filter element 21 and the secondary filter element 22 to perform reverse water washing, so that the self-cleaning effect of the primary filter element 21 and the secondary filter element 22 is better. The design of the sleeve assembly is linked with the primary filter element 21 and the secondary filter element 22, while not affecting the separate sewage discharge work of the primary filter element 21, the secondary filter element 22 and the tertiary filter element 23;

[0094] At the same time, the rolling roller 25 is designed to prevent the filter element from being blocked by large particles of impurities in the water body.

[0095] The primary filter element 21, the secondary filter element 22 and the tertiary filter element 23 have predetermined shapes;

[0096] The inner wall of the primary filter element 21 is provided with a primary filter gear ring 211 meshing with the primary drive gear 262;

[0097] A secondary filter gear ring 221 meshing with the transmission gear 242 is installed on the top of the inner wall of the secondary filter element 22 .

[0098] The primary filter element 21, the secondary filter element 22 and the tertiary filter element 23 are made of filter materials, which may include filter cotton, filter mesh or other filter media.

[0099] The primary filter element 21 is sealed at the bottom, the secondary filter element 22 is sealed at the top, and the tertiary filter element 23 is sealed at the bottom.

[0100] A bilge 13 is installed at the bottom of the shell 1, and the bilge 13 is connected to a cabin sewage pipe 14 extending to the outside of the shell 1, and a cabin sewage valve is provided on the cabin sewage pipe 14;

[0101] A multi-layer honeycomb filter filling layer 11 is installed on the top of the housing 1 .

[0102] The water inlet 244 is connected to a water inlet pipe 32 extending to the outside of the housing 1, and a water pump is provided on the water inlet pipe 32;

[0103] The inner cavity sewage outlet 245 is connected to an inner cavity sewage pipe 33 extending to the outside of the shell 1 , and the inner cavity sewage pipe 33 is provided with an inner cavity sewage valve.

[0104] The water inlet pipe 32 is externally connected to a sedimentation tank, and the external cavity sewage pipe 31 is provided with an external cavity sewage valve.

[0105] A working method, comprising: a filtering method and a cleaning method;

[0106] The filtering method comprises:

[0107] Step 11, during filtration, the water in the sedimentation tank is pumped into the water inlet pipe 32 through the water pump, enters the flow pipe 24 through the water inlet 244, enters the primary filter element 21, the secondary filter element 22, and the tertiary filter element 23 for filtration. As the water body gradually increases, the water level in the housing 1 continues to rise, and is filtered again through the honeycomb filter filling layer 11, and is led out to the designated position through the water storage port;

[0108] Step 12: During step 11, water continues to exist in the flow tube 24, which is in a positive pressure state. The blocking hinge 243A is attached to the inner wall of the flow tube 24, and the water passes through the primary filter element 21, then enters the secondary filter element 22, and finally enters the tertiary filter element 23;

[0109] Step 13, during step 11, the input gear 267 is driven to rotate by the driving motor 266, the output gear 264 is driven to rotate, the driving shaft 26 is driven to rotate, the roller driving gear 263 is driven to rotate, the roller gear ring 253 is driven to rotate, the rolling roller 25 is driven to rotate, and the rolling wall 252 is driven to intermittently contact with the elliptical chamber, thereby rolling large particles of impurities in the water body and rolling the large particles of impurities into small particles of impurities;

[0110] In the filtering method, corresponding reagents can be added to increase the filtering and sedimentation effects.

[0111] The cleaning method comprises:

[0112] Step 21, when cleaning, turn off the water pump and cut off the flow of the water inlet pipe 32. At this time, there is water in the housing 1, and the lifting cylinder 265 works to drive the driving shaft 26 to rise, and drive the roller driving gear 263, the primary driving gear 262, and the secondary driving gear 261 to rise, so that the roller driving gear 263 is separated from the roller gear ring 253, and the primary driving gear 262 and the secondary driving gear 261 are respectively meshed with the primary filter gear ring 211 and the secondary filter gear ring 221;

[0113] Step 22, the input gear 267 is driven to rotate by the driving motor 266, the output gear 264 is driven to rotate, the driving shaft 26 is driven to rotate, and the primary filter element 21 and the secondary filter element 22 are driven to rotate in opposite directions, so that the primary filter element 21 and the secondary filter element 22 are self-cleaned in the water body, and at the same time, the rotation of the secondary filter element 22 drives the water body between the tertiary filter element 23 and the secondary filter element 22 to generate turbulence, and the inner wall of the tertiary filter element 23 is cleaned;

[0114] Step 23, open the inner cavity drain valve and the outer cavity drain valve, the water between the secondary filter element 22 and the primary filter element 21 flushes the blocking hinge 243A, the sewage and impurities between the secondary filter element 22 and the primary filter element 21 are discharged into the flow pipe 24 through the reflux port 243, discharged into the inner cavity drain pipe 33 through the inner cavity drain port 245, and then discharged out of the housing 1;

[0115] The water on the inner wall of the primary filter element 21 is directly discharged into the flow pipe 24 and then discharged out of the housing 1;

[0116] The water between the tertiary filter element 23 and the secondary filter element 22 is discharged to the outside of the housing 1 through the external cavity sewage pipe 31;

[0117] Step 24, after the water between the primary filter element 21, the secondary filter element 22, and the tertiary filter element 23 is drained, the sewage valve in the cabin is opened to drain the water at the bottom of the shell 1;

[0118] In this way, water with impurities on the inner wall of the primary filter element 21, between the primary filter element 21 and the secondary filter element 22, and between the secondary filter element 22 and the tertiary filter element 23 can be discharged separately, thereby reducing the impurities on the inner wall of the secondary filter element 22 from attaching to the outer wall of the primary filter element 21 again, and the impurities on the inner wall of the tertiary filter element 23 from attaching to the outer wall of the secondary filter element 22;

[0119] During the cleaning process, when the water is insufficient, water is introduced from the outside, and the water is introduced into the housing 1 through the water outlet 12, which is achieved by an external pump body and a water source.

[0120] Working principle description:

[0121] During filtration, the water in the sedimentation tank is pumped into the water inlet pipe 32 through the water pump, enters the flow pipe 24 through the water inlet 244, enters the primary filter element 21, the secondary filter element 22, and the tertiary filter element 23 for filtration. As the water body gradually increases, the water level in the shell 1 continues to rise, and is filtered again through the honeycomb filter filling layer 11, and is led out to the designated position through the water storage port;

[0122] There is water in the flow tube 24 continuously, which is in a positive pressure state. The blocking hinge 243A is attached to the inner wall of the flow tube 24. The water passes through the primary filter element 21 and then enters the secondary filter element 22, and finally enters the tertiary filter element 23.

[0123] The input gear 267 is driven by the driving motor 266 to rotate, the output gear 264 is driven to rotate, the driving shaft 26 is driven to rotate, the roller driving gear 263 is driven to rotate, the roller gear ring 253 is driven to rotate, the rolling roller 25 is driven to rotate, and the rolling wall 252 is driven to intermittently contact with the elliptical chamber, thereby rolling large particles of impurities in the water body and rolling the large particles of impurities into small particles of impurities;

[0124] In the filtering method, corresponding reagents can be added to increase the filtering and sedimentation effects.

[0125] When cleaning, turn off the water pump and cut off the flow of the water inlet pipe 32. At this time, there is water in the housing 1, and the lifting cylinder 265 works to drive the drive shaft 26 to rise, and drive the roller drive gear 263, the first-level drive gear 262, and the second-level drive gear 261 to rise, so that the roller drive gear 263 is separated from the roller gear ring 253, and the first-level drive gear 262 and the second-level drive gear 261 are respectively meshed with the first-level filter gear ring 211 and the second-level filter gear ring 221;

[0126] Then, the input gear 267 is driven to rotate by the driving motor 266, which drives the output gear 264 to rotate, drives the driving shaft 26 to rotate, and drives the primary filter element 21 and the secondary filter element 22 to rotate in the opposite direction, so that the primary filter element 21 and the secondary filter element 22 are self-cleaned in the water body. At the same time, the rotation of the secondary filter element 22 drives the water body between the tertiary filter element 23 and the secondary filter element 22 to generate turbulence, and completes the cleaning of the inner wall of the tertiary filter element 23;

[0127] The inner cavity drain valve and the outer cavity drain valve are opened, and the water between the secondary filter element 22 and the primary filter element 21 flushes the blocking hinge 243A, and the sewage and impurities between the secondary filter element 22 and the primary filter element 21 are discharged into the flow pipe 24 through the reflux port 243, and discharged into the inner cavity drain pipe 33 through the inner cavity drain port 245, and then discharged out of the housing 1;

[0128] The water on the inner wall of the primary filter element 21 is directly discharged into the flow pipe 24 and then discharged out of the housing 1;

[0129] The water between the tertiary filter element 23 and the secondary filter element 22 is discharged to the outside of the housing 1 through the external cavity sewage pipe 31;

[0130] When the water between the primary filter element 21 , the secondary filter element 22 , and the tertiary filter element 23 is completely drained, the sewage valve in the cabin is opened to drain the water at the bottom of the shell 1 .

[0131] The preferred specific embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above specific embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A filtering device comprising: A housing, and a multi-stage filter disposed in the housing; Characterized in that the multi-stage filtration unit comprises: The casing assembly comprises a flow pipe arranged in the housing, a rolling roller located in the flow pipe, and a drive shaft plugged into the rolling roller, wherein the flow pipe is provided with a reflux port, a water inlet port and an inner cavity sewage outlet; A multi-stage filter element, comprising a primary filter element sleeved on the flow tube, a secondary filter element, and a tertiary filter element sleeved on the secondary filter element and fixed on the flow tube; The secondary filter element is sleeved on the primary filter element; The reflux port is in communication with the secondary filter element, and a blocking hinge is hingedly connected to the inner wall of the flow tube at the reflux port; The bottom of the three-stage filter element is connected with an outer cavity sewage pipe extending to the outside of the shell.

2. A filtering device according to claim 1, characterized in that: One end of the flow tube is closed, an elliptical chamber is opened in the flow tube, a movable slide groove is opened on the inner wall of the flow tube, a gear rack is installed at the end of the flow tube, and a transmission gear is sleeved on the end of the gear rack.

3. A filtering device according to claim 2, characterized in that: The rolling roller is hollow, with a roller gear ring installed inside, and rotating sealing rings adapted to the driving shaft installed at both ends; The outer wall of the rolling roller is provided with a rolling wall, and the top of the rolling roller is provided with a sliding frame adapted to the movable sliding groove.

4. A filtering device according to claim 3, characterized in that: The driving shaft is sequentially mounted with a secondary driving gear, a primary driving gear, a roller driving gear and an output gear; The secondary driving gear is meshed with the transmission gear, and the roller driving gear is meshed with the roller gear ring.

5. A filtering device according to claim 4, characterized in that: A lifting cylinder and a driving motor are installed at the bottom of the shell, and the output end of the lifting cylinder is connected to the driving shaft; The output end of the driving motor is sleeved with an input gear meshing with the output gear.

6. A filtering device according to claim 1, characterized in that: The primary filter element, the secondary filter element and the tertiary filter element have predetermined shapes; The inner wall of the primary filter element is provided with a primary filter gear ring meshing with the primary drive gear; A secondary filter gear ring meshing with a transmission gear is installed on the top of the inner wall of the secondary filter element.

7. A filtering device according to claim 1, characterized in that: A bilge is installed at the bottom of the shell, the bilge is connected to a cabin sewage pipe extending outside the shell, and the cabin sewage pipe is provided with a cabin sewage valve; Multiple layers of honeycomb filter filling layers are installed on the top of the shell.

8. A filtering device according to claim 1, characterized in that: The water inlet is connected to a water inlet pipe extending outside the shell, and the water inlet pipe is provided with a water pump; The inner cavity sewage outlet is connected with an inner cavity sewage pipe extending to the outside of the shell, and the inner cavity sewage pipe is provided with an inner cavity sewage valve.

9. A filtering device according to claim 1, characterized in that: The water inlet pipe is externally connected to a sedimentation tank, and the external cavity sewage pipe is provided with an external cavity sewage valve.

10. A working method of a filtering device, implemented based on a filtering device according to any one of claims 1 to 9, wherein: include: Filtration methods and cleaning methods; The filtering method comprises: Step 11: During filtration, the water in the sedimentation tank is pumped into the water inlet pipe through the water pump, enters the flow pipe through the water inlet, and enters the primary filter element, the secondary filter element, and the tertiary filter element for filtration. As the water body gradually increases, the water level in the shell continues to rise, and is filtered again through the honeycomb filter filling layer and is led out to the designated location through the water storage port; The cleaning method comprises: Step 21, when cleaning, turn off the water pump and cut off the flow of the water inlet pipe. At this time, there is water in the shell, and the lifting cylinder works to drive the drive shaft to rise, so that the first-level driving gear and the second-level driving gear are respectively engaged with the first-level filter gear ring and the second-level filter gear ring; Step 22, the driving motor drives the driving shaft to rotate, driving the primary filter element and the secondary filter element to rotate in opposite directions, so that the primary filter element and the secondary filter element are self-cleaned in the water body, and the rotation of the secondary filter element drives the water body between the tertiary filter element and the secondary filter element to generate turbulence, and completes the cleaning of the inner wall of the tertiary filter element; Step 23, open the inner cavity drain valve and the outer cavity drain valve, the water between the secondary filter element and the primary filter element flushes the blocking hinge, the sewage and impurities between the secondary filter element and the primary filter element are discharged into the flow pipe through the reflux port, discharged into the inner cavity drain pipe through the inner cavity drain port, and discharged outside the shell; The water at the inner wall of the primary filter element is directly discharged into the flow pipe and discharged outside the shell; The water between the third-stage filter element and the second-stage filter element is discharged to the outside of the shell through the external cavity sewage pipe; Step 24: After the water between the primary filter element, the secondary filter element, and the tertiary filter element is drained, the sewage valve in the cabin is opened to drain the water at the bottom of the shell.

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