Self-cleaning sewage filtering device

Abstract

The invention discloses a self-cleaning sewage filter device, which belongs to the technical field of sewage filtering equipment. The structure comprises a filter tank and a plurality of water filter buckets stacked in the filter tank, wherein the upper and lower ends of the filter tank are respectively fixed and connected with a water inlet pipe and a drain pipe; a guide groove with a circular cross-section is arranged inside the water filter bucket, a plurality of filter holes are arranged at the bottom of the guide groove, a waste material outlet inclined edge and an air injection pipe II are respectively arranged at the upper and lower ends of the guide groove, and an air injection pipe I is fixed and connected to the side of the filter tank, and the air injection pipe I is connected to the air injection pipe II; the application effectively avoids the blockage of the filter holes by solid debris through the optimization and improvement of the structure of the water filter component, ensures the continuous operation of the equipment, and after the working cycle of the equipment is completed, uses high-pressure airflow to guide and remove the solid debris, and combines with the implementation of multi-stage filtration to discharge the solid debris according to the particle size, so as to facilitate the recycling and further treatment of resources.

Description

Technical Field

[0001] The invention relates to the technical field of sewage filtering equipment, in particular to a self-cleaning sewage filtering device. Background Art

[0002] Sewage contains suspended solids, grease, microorganisms and other impurities. If these substances accumulate in the filter container, it will cause the filter material to be blocked, thereby reducing the filtration efficiency and treatment capacity. Therefore, it is necessary to clean the filter container during the filtration of sewage to ensure the sewage filtration effect;

[0003] The existing application number is CN202210029815.7. A sewage filter device is disclosed in the patent document. A solution is disclosed in which a brush and a scraper component are used to scrape and clean the filter structure to keep the sewage flowing smoothly at the filter. Specifically, the sewage passes through the upper screen tube, and the upper screen tube allows the large particles of sediment contained in the sewage to remain in the upper screen tube. The sewage enters the filter box for multi-stage filtration. Sediments in different states remain on the primary filter, the secondary filter, and the tertiary filter respectively. The anti-blocking motor is driven to drive the four-slot belt pulley to rotate. The four-slot belt pulley drives the single-slot belt pulley to rotate through the transmission belt and drives the movable plate to move along the screw rod, and drives the brush to clean the sediment on the filter, and discharges the pushed sediment through the sediment discharge pipe; the scraper motor is started to drive the transmission tooth chain to rotate, and the transmission tooth chain drives the scraper to rotate. The scraper scrapes away the silt on the upper surface of the mud guard and the lower surface of the bottom plate, and the scraper causes the sediment to enter the silt pool for accumulation;

[0004] When using the technical solution in the above-mentioned patent document, the bristles at the bottom of the brush are always in contact with the filter screen during the reciprocating movement, so that only one side of the brush can effectively push and discharge the sludge scraped from the filter screen, while the sludge on the other side of the brush will move part of the sludge to the depth of the filter screen due to the pressure exerted by the movement of the brush, thereby affecting the actual cleaning effect of the filter screen. In addition, the sewage pipe is arranged horizontally, which will cause part of the sludge to be blocked in the sewage pipe and cannot be discharged smoothly. If the sewage pipe is adjusted to a vertical direction, the water content of the discharged sludge will increase significantly, affecting the filtering effect of the sewage. Therefore, the present application provides a self-cleaning sewage filtration device. Summary of the invention

[0005] In order to solve the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a self-cleaning sewage filter device, which effectively avoids the blockage of the filter holes by solid debris by optimizing and improving the structure of the water filter components, ensures the continuous operation of the equipment, and after the equipment working cycle, uses high-pressure airflow to guide and remove solid debris, and combines multi-stage filtration to discharge solid debris according to particle size, so as to facilitate resource recovery and further processing.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] A self-cleaning sewage filter device is provided, comprising a filter tank and a plurality of filter buckets stacked in the filter tank, wherein the upper and lower ends of the filter tank are respectively fixed and connected with a water inlet pipe and a drain pipe; a guide groove with a circular cross-section is arranged inside the filter bucket, and a plurality of filter holes are arranged at the bottom of the guide groove, the guide groove is fitted to the inner wall of the filter bucket and extends toward the middle side of the bottom of the filter bucket along a spiral trajectory, the upper and lower ends of the guide groove are respectively provided with a waste lead-out inclined edge and an air injection pipe II, and the side of the filter tank is fixed and connected with an air injection pipe I, and the air injection pipe I is connected to the air injection pipe II.

[0008] Furthermore, a waste cleaning channel is fixed and connected to the side of the filter tank, and an abutment cylinder at the bottom of the waste cleaning channel is correspondingly arranged on the upper side of the waste outlet inclined edge and fits with the inner side surface of the water filter bucket, and a waste guide bucket with an opening expanding outward is fixedly installed on the side of the abutment cylinder.

[0009] Furthermore, a sleeve is fixedly installed on the middle side of the bottom of the water filter bucket, and a synchronous control column is vertically slidably installed in the middle of the filter tank. The sleeve and the synchronous control column are detachably fixedly connected.

[0010] In the present application, an optional technical solution for the movement control method of the synchronous control column is: a telescopic driver for driving the synchronous control column to move vertically is installed on the top of the filter tank.

[0011] In the present application, another optional technical solution for the movement control method of the synchronous control column is: a lifting handle is integrally formed on the top of the synchronous control column, and the lifting handle is detachably connected to the hook of the lifting device.

[0012] Furthermore, the apertures of the filter holes on the multiple filter buckets gradually decrease from top to bottom, thereby achieving multi-stage filtration of multi-stage sewage.

[0013] Furthermore, the air injection pipe I is connected to the air injection pipe II through a flexible connecting pipe, and at least two T-shaped columns are fixedly installed at the bottom of the water filter bucket, and the T-shaped columns are slidably connected to the fixed seats on the inner wall of the filter tank.

[0014] Furthermore, the abutment cylinder is connected to the waste cleaning channel through a movable enclosure plate and a sealing enclosure plate that are embedded and slidably engaged with each other. The movable enclosure plate and the sealing enclosure plate are respectively detachably fixedly connected to the abutment cylinder and the waste cleaning channel. An elastic ring is fixedly installed between the fitting edges of the movable enclosure plate and the side of the sealing enclosure plate, and a plurality of ventilation grooves are arranged on the fitting edges.

[0015] Furthermore, a plurality of externally threaded sleeves are detachably fixedly installed on the outer side of the synchronous control column, and the plurality of externally threaded sleeves are correspondingly arranged on the upper sides of the plurality of water filter buckets; a rotating drum is connected to the outer side of the externally threaded sleeve via a threaded transmission, and a plurality of fan blades are arranged at equal angular intervals on the circumference of the rotating drum, and the ends of the plurality of fan blades away from each other are connected via a swivel, and the swivel is rotatably engaged and connected between the fixed arms on both sides of the inner wall of the filter tank.

[0016] Furthermore, an elastic pad is fixedly mounted on the bottom of the fixing seat, and the bottom of the elastic pad is abutted and matched with the T-shaped column.

[0017] Furthermore, the height of the sealing enclosure is greater than the height of the movable enclosure, and the outer side surface of the sealing enclosure abuts against the inner side surface of the abutment tube.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The self-cleaning sewage filter device of the example of the present invention can guide the debris in the sewage to the middle side of the bottom of the water filter bucket because the water filter bucket is low in the middle and high around it, so as to avoid the filter holes at the upper end of the side of the water filter bucket being blocked, thereby maintaining the anti-interference ability of the equipment to sewage treatment; when the water flows along the guide groove to the middle side of the bottom of the water filter bucket, the spiral structure of the guide groove is used to increase the flow speed of the sewage and improve the sewage filtration efficiency.

[0020] 2. In the self-cleaning sewage filter device of the present invention, when sewage flows through a single water filter bucket, the sewage will carry some debris into the guide groove, thereby affecting the patency of the filter holes at the bottom of the water filter bucket. At this time, high-pressure gas is filled into the gas injection pipe I, and the airflow blows the debris entering the guide groove, so that this part of the debris moves along the guide groove from bottom to top, and is finally discharged from the waste guide bucket, thereby realizing the self-cleaning treatment of the guide groove inside the water filter bucket; in this process, the solid debris in the guide groove is blown by the airflow, and its surface moisture is reduced, so that the solid debris is easier to handle later after drying.

[0021] 3. In the self-cleaning sewage filtration device of the example of the present invention, the apertures of the filter holes on the multiple filter buckets gradually decrease from top to bottom; this makes the sizes of the debris particles collected at the outer ends of the multiple waste cleaning channels different, so that the solid debris can be discharged according to the particle size classification, which is convenient for resource recovery and further processing.

[0022] 4. In the self-cleaning sewage filter device of the example of the present invention, the cross-section of the guide groove is circular, and the width of the guide groove exposed on the water filter bucket is smaller than the diameter of the guide groove, so that the airflow passing through the guide groove can be effectively gathered, thereby increasing the efficiency of pushing and guiding debris; in addition, according to the Bernoulli principle, when the air flow rate in the guide groove is large, it can drive the air at the bottom of the guide groove to pass upward through the filter holes into the guide groove, thereby loosening and cleaning the debris that may be blocked in the filter holes, making the filter holes more unobstructed, and ensuring the continuous and stable progress of sewage filtration treatment.

[0023] 5. The self-cleaning sewage filter device of the example of the present invention controls the vertical lifting of the synchronous control column to drive the water filter bucket to slide vertically in the filter tank, so that the vibration generated by the collision between the elastic pad and the T-shaped column scrapes the dirt attached to the inner wall of the filter tank, and makes the dirt with strong adhesion to the inner wall of the water filter bucket gather to the bottom of the water filter bucket so that it can be discharged with the flow of sewage later, thereby realizing self-cleaning treatment of the colloidal debris on the filter tank and the water filter bucket.

[0024] 6. The self-cleaning sewage filter device of the example of the present invention controls the synchronous reciprocating lifting and lowering of the synchronous control column and the external threaded sleeve, and utilizes the threaded transmission between the rotating drum and the external threaded sleeve to drive the rotating ring and multiple fan blades to rotate. Under the action of the fan blades, the light-density impurities such as foam particles that are not easily accumulated in the guide groove are blown downward, so that they fit the inner wall of the water filter bucket and enter the guide groove, so as to guide and discharge this part of light solid impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 A cross-sectional view of the entire self-cleaning sewage filter device provided by an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the structure of multiple water filter buckets provided in an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of the structure of the gas injection pipe I, the water filter bucket and the waste removal channel provided in an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of the structure of a waste removal channel and an abutment cylinder provided in an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of the structure of a water filter bucket, a guide groove and a T-shaped column provided in an embodiment of the present invention;

[0031] Figure 6A schematic diagram of the structure of the gas injection pipe I, the flexible connecting pipe and the gas injection pipe II provided in an embodiment of the present invention;

[0032] Figure 7 A schematic diagram of the structure of a fixing base, a T-shaped column, a water filter bucket and a swivel provided in an embodiment of the present invention;

[0033] Figure 8 This is a schematic structural diagram of a fixed arm, a rotating ring and a fan blade provided in an embodiment of the present invention.

[0034] In the figure: 11 filter tank, 12 water inlet pipe, 13 drain pipe, 14 air injection pipe I, 15 flexible connecting pipe, 16 fixed seat, 161 elastic pad, 17 fixed arm, 18 synchronous control column, 19 telescopic drive, 21 water filter bucket, 22 guide groove, 221 waste material outlet inclined edge, 222 air injection pipe II, 23 filter hole, 24 T-shaped column, 25 sleeve, 31 waste cleaning channel, 32 sealing enclosure, 321 fitting edge, 322 ventilation groove, 33 elastic ring, 34 movable enclosure, 35 abutment cylinder, 36 waste guide bucket, 41 swivel, 42 connecting column, 43 fan blade, 44 rotating cylinder, 45 external threaded sleeve. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0036] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0037] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings.

[0041] Embodiment 1:

[0042] like Figure 1 , Figure 2 and Figure 5 As shown, this embodiment provides a self-cleaning sewage filtering device, including a filter tank 11 and a plurality of water filter buckets 21 stacked in the filter tank 11, wherein the upper and lower ends of the filter tank 11 are respectively fixed and connected with a water inlet pipe 12 and a drain pipe 13 arranged in staggered positions; a guide groove 22 is arranged inside the water filter bucket 21, and a plurality of filter holes 23 are arranged at the bottom of the guide groove 22; since the middle of the water filter bucket 21 is low and the surroundings are high, the debris in the sewage can be guided to the middle side of the bottom of the water filter bucket 21, so as to avoid the filter holes 23 at the upper end of the side of the water filter bucket 21 being blocked, thereby maintaining the anti-interference and continuity of the equipment for sewage treatment.

[0043] like Figure 2 As shown, the guide groove 22 is attached to the inner wall of the water filter bucket 21 and extends along a spiral trajectory toward the bottom middle side of the water filter bucket 21. When the water flows along the guide groove 22 toward the bottom middle side of the water filter bucket 21, the spiral structure of the guide groove 22 is utilized to increase the flow speed of the sewage, thereby improving the filtering efficiency of the sewage.

[0044] like Figure 2 , Figure 3 and Figure 5 As shown, the upper and lower ends of the guide groove 22 are respectively provided with a waste outlet bevel 221 and an air injection pipe II 222 , and the side of the filter tank 11 is fixedly and connected with an air injection pipe I 14 , which is connected to the air injection pipe II 222 .

[0045] like Figure 1 and Figure 3As shown, a waste cleaning channel 31 is fixedly connected and provided on the side of the filter tank 11, and the number of the waste cleaning channels 31 is consistent with the number of the water filter bucket 21; the abutment cylinder 35 at the bottom of the waste cleaning channel 31 is correspondingly arranged on the upper side of the waste outlet inclined edge 221 and fits with the inner side surface of the water filter bucket 21, and a waste guide bucket 36 with an opening expanding outward is fixedly installed on the side of the abutment cylinder 35.

[0046] When using the self-cleaning sewage filter device of this application for sewage filtration treatment:

[0047] The sewage is poured into the filter tank 11 from the water inlet pipe 12 , and the sewage passes through the filter holes 23 on the plurality of filter buckets 21 in sequence, and the sewage is filtered and treated, and the purified sewage is discharged from the drain pipe 13 .

[0048] When sewage flows through a single water filter 21, the sewage will carry some debris into the guide groove 22, thereby affecting the patency of the filter holes 23 at the bottom of the water filter 21. At this time, high-pressure gas is filled into the gas injection pipe Ⅰ14, and the airflow blows the debris entering the guide groove 22, so that this part of the debris moves along the guide groove 22 from bottom to top, and is finally discharged from the waste guide 36, thereby realizing the self-cleaning treatment of the guide groove 22 inside the water filter 21; in this process, the solid debris in the guide groove 22 is blown by the airflow, and its surface moisture is reduced, making the solid debris easier to handle after drying.

[0049] In addition, a plurality of water filter buckets 21 are arranged from top to bottom, such as Figure 2 As shown, the pore size of the filter holes 23 thereon gradually decreases; this results in differences in the particle sizes of the debris collected at the outer ends of the plurality of waste removal channels 31, so that the solid debris can be discharged according to their particle sizes, facilitating resource recovery and further processing.

[0050] In order to increase the self-cleaning efficiency of the guide groove 22, as Figure 3 As shown, the cross-section of the guide groove 22 is circular, and the width of the guide groove 22 exposed on the water filter 21 is smaller than the diameter of the guide groove 22, so that the airflow flowing through the guide groove 22 can be effectively gathered, and the efficiency of pushing and guiding debris can be increased; in addition, according to the Bernoulli principle, when the air flow rate in the guide groove 22 is large, it can drive the air at the bottom of the guide groove 22 to pass upward through the filter hole 23 and enter the guide groove 22, thereby loosening and cleaning the debris that may be blocked in the filter hole 23, making the filter hole 23 more unobstructed, and ensuring the continuous and stable filtration of sewage treatment.

[0051] Embodiment 2:

[0052] The features of this embodiment that are the same as those of the first embodiment are not described in detail. The difference between this embodiment and the first embodiment is that: Figure 1 and Figure 6 As shown, in this embodiment, a sleeve 25 is fixedly installed on the middle side of the bottom of the water filter bucket 21, and a synchronous control column 18 is vertically slidably installed in the middle of the filter tank 11. The sleeve 25 and the synchronous control column 18 are detachably fixedly connected.

[0053] A telescopic driver 19 for driving the synchronous control column 18 to move vertically is installed on the top of the filter tank 11; the telescopic driver 19 of the present application can be a linear electric cylinder or a hydraulic cylinder, and the telescopic driver 19 is started to drive the synchronous control column 18 to move vertically.

[0054] In addition, a lifting handle can be integrally formed on the top of the synchronous control column 18, and the lifting handle can be detachably connected to the hook of the lifting equipment. The weight of the synchronous control column 18 and multiple water filter buckets 21 can be used to achieve the lifting and lowering control of the synchronous control column 18. The use of this solution can avoid the waste of resources caused by the long-term idleness of the telescopic drive 19.

[0055] like Figure 5 and Figure 7 As shown, at least two T-shaped columns 24 are fixedly installed at the bottom of the water filter bucket 21, and the T-shaped columns 24 are slidably connected to the fixed seat 16 on the inner wall of the filter tank 11. An elastic pad 161 is fixedly installed at the bottom of the fixed seat 16, and the bottom of the elastic pad 161 abuts against the T-shaped column 24.

[0056] By controlling the vertical lifting of the synchronous control column 18, the water filter bucket 21 is driven to slide vertically in the filter tank 11, so that the vibration generated by the collision between the elastic pad 161 and the T-shaped column 24 can scrape the dirt attached to the inner wall of the filter tank 11, and make the dirt with strong adhesion to the inner wall of the water filter bucket 21 gather to the bottom of the water filter bucket 21 so that it can be discharged with the flow of sewage later, thereby realizing self-cleaning treatment of the colloidal debris on the filter tank 11 and the water filter bucket 21.

[0057] In order to prevent the air injection pipe II 222 from bending during the vertical sliding process of the water filter bucket 21, Figure 3 and Figure 6 As shown, the gas injection pipe I 14 is connected to the gas injection pipe II 222 through the flexible connecting pipe 15, and the elastic deformation characteristics of the flexible connecting pipe 15 are utilized to ensure continuous and stable use of the gas injection pipe I 14 and the gas injection pipe II 222.

[0058] In order to ensure the stable fit between the abutment tube 35 and the water filter 21, Figure 4As shown, the abutment cylinder 35 is connected to the waste cleaning channel 31 through a movable enclosure 34 and a sealing enclosure 32 that are fitted and slidably engaged with each other. The movable enclosure 34 and the sealing enclosure 32 are respectively detachably fixedly connected to the abutment cylinder 35 and the waste cleaning channel 31. An elastic ring 33 is fixedly installed between the fitting edges 321 on the sides of the movable enclosure 34 and the sealing enclosure 32. A plurality of ventilation grooves 322 are provided on the fitting edges 321. The elastic ring 33 always has a tendency to shrink, and pulls the movable enclosure 34 downward, so that the abutment cylinder 35 and the water filter bucket 21 can be stably fitted together, thereby ensuring the efficiency of guiding and discharging solid debris inside the guide groove 22.

[0059] Among them, the height of the sealing enclosure 32 is greater than the height of the movable enclosure 34, so that the outer side surface of the sealing enclosure 32 abuts against the inner side surface of the abutment tube 35, thereby ensuring the stable lifting and lowering movement of the abutment tube 35 relative to the waste cleaning channel 31, preventing debris from entering between the sealing enclosure 32 and the movable enclosure 34, thereby ensuring the cleanliness of the interior.

[0060] Embodiment three:

[0061] The features common to the second embodiment of this embodiment are not described in detail. The difference between the second embodiment of this embodiment and the second embodiment is that: Figure 7 and Figure 8 As shown, in this embodiment, a plurality of externally threaded sleeves 45 are detachably fixedly installed on the outer side of the synchronous control column 18, and the plurality of externally threaded sleeves 45 are correspondingly arranged on the upper side of the plurality of water filter buckets 21; the outer side of the externally threaded sleeves 45 is connected with a rotating drum 44 through a threaded transmission, and a plurality of fan blades 43 are arranged at equal angular intervals on the circumference of the rotating drum 44, and the ends of the plurality of fan blades 43 away from each other are connected by a swivel 41, and the swivel 41 is rotatably connected between the fixed arms 17 on both sides of the inner wall of the filter tank 11.

[0062] By controlling the synchronous reciprocating lifting and lowering of the synchronous control column 18 and the external threaded sleeve 45, the threaded transmission between the rotating drum 44 and the external threaded sleeve 45 is utilized to drive the rotating ring 41 and the plurality of fan blades 43 to rotate. Under the action of the fan blades, the light-weight solid impurities such as foam particles that are not easily accumulated in the guide groove 22 are blown downwards to fit the inner wall of the water filter hopper 21, so as to guide and discharge these light solid impurities.

[0063] The fan blades 43 are connected to the swivel 41 via the connecting column 42, so as to avoid collision between the fan blades 43 and the fixed arm 17, and enable the fan blades 43 to have a certain height dimension, thereby increasing the blowing effect on light solid debris.

[0064] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

[0065] Except for the technical features described in the specification, the remaining technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present invention, the remaining technical features will not be described here in detail.

Claims

1. A self-cleaning sewage filter device, characterized in that: It comprises a filter tank (11), a water inlet pipe (12) and a water outlet pipe (13) arranged at the upper and lower ends of the filter tank (11), and a plurality of water filter buckets (21) stacked in the filter tank (11); The water filter bucket (21) is provided with a guide groove (22) with a circular cross section inside, and a plurality of filter holes (23) are provided inside the guide groove (22). The guide groove (22) is fitted to the inner wall of the water filter bucket (21) and extends along a spiral track toward the middle side of the bottom of the water filter bucket (21). The upper and lower ends of the guide groove (22) are respectively provided with a waste material outlet inclined edge (221) and an air injection pipe II (222). The side of the filter tank (11) is fixedly provided with an air injection pipe I (14) in communication therewith, and the air injection pipe I (14) is in communication with the air injection pipe II (222). A waste removal channel (31) is fixedly provided on the side of the filter tank (11) and is in communication therewith. A contact cylinder (35) at the bottom of the waste removal channel (31) is correspondingly arranged on the upper side of the waste material outlet inclined edge (221) and is in contact with the inner side surface of the water filter bucket (21). A waste guide bucket (36) with an opening expanding outward is fixedly installed on the side of the contact cylinder (35).

2. The self-cleaning sewage filtering device according to claim 1, characterized in that: A sleeve (25) is fixedly mounted on the middle side of the bottom of the water filter bucket (21), a synchronous control column (18) is vertically slidably mounted on the middle of the filter tank (11), and the sleeve (25) and the synchronous control column (18) are detachably fixedly connected; The air injection pipe I (14) is connected to the air injection pipe II (222) via a flexible connecting pipe (15); at least two T-shaped columns (24) are fixedly installed at the bottom of the water filter bucket (21); the T-shaped columns (24) are slidably connected to the fixing seat (16) on the inner wall of the filter tank (11); A telescopic driver (19) for driving the synchronous control column (18) to move vertically is installed on the top of the filter tank (11).

3. The self-cleaning sewage filtering device according to claim 1, characterized in that: The filter holes (23) on the plurality of water filter buckets (21) gradually decrease in diameter from top to bottom.

4. The self-cleaning sewage filtering device according to claim 2, characterized in that: The abutment tube (35) is connected to the waste removal passage (31) through a movable enclosure (34) and a sealing enclosure (32) that are slidably engaged with each other. The movable enclosure (34) and the sealing enclosure (32) are detachably fixedly connected to the abutment tube (35) and the waste removal passage (31), respectively. An elastic ring (33) is fixedly installed between the fitting edges (321) on the sides of the movable enclosure (34) and the sealing enclosure (32), and a plurality of ventilation grooves (322) are provided on the fitting edges (321).

5. The self-cleaning sewage filtering device according to claim 2, characterized in that: A plurality of externally threaded sleeves (45) are detachably and fixedly mounted on the outer side of the synchronous control column (18), and the plurality of externally threaded sleeves (45) are correspondingly arranged on the upper sides of the plurality of water filter buckets (21); The outer side of the external threaded sleeve (45) is connected to a rotating drum (44) via a threaded transmission, a plurality of blades (43) are arranged at equal angular intervals on the circumference of the rotating drum (44), and the ends of the plurality of blades (43) that are away from each other are connected via a rotating ring (41), and the rotating ring (41) is engaged and rotatably connected between fixed arms (17) on both sides of the inner wall of the filter tank (11).

6. The self-cleaning sewage filtering device according to claim 2, characterized in that: An elastic pad (161) is fixedly mounted on the bottom of the fixing seat (16), and the bottom of the elastic pad (161) is in abutment with the T-shaped column (24).

7. The self-cleaning sewage filtering device according to claim 4, characterized in that: The height of the sealing enclosure (32) is greater than the height of the movable enclosure (34), and the outer side surface of the sealing enclosure (32) abuts against the inner side surface of the abutment tube (35).

8. The self-cleaning sewage filtering device according to claim 5, characterized in that: The fan blades (43) are connected to the rotating ring (41) via a connecting column (42).

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