Anti-blocking filtering device for water pollution treatment

By combining a flexible filter screen, a drive mechanism, and an air jet mechanism, the problem of easy clogging of the filter screen is solved, achieving a highly efficient cleaning and anti-clogging effect and ensuring the stable operation of the filtration device.

CN223901388UActive Publication Date: 2026-02-13SUJIE GREEN ENERGY FLUID TECHNOLOGY (CHENGDU) CO LTD
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Patent Information

Application Number
CN202520474242.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-18
Publication Date
2026-02-13
Estimated Expiration
2035-03-18

AI Technical Summary

Technical Problem

Existing wastewater filtration devices are prone to clogging at the filter screen location, and the existing cleaning and anti-clogging effects are not good, especially the dirt inside the filter screen holes is difficult to clear.

Method used

The system employs a flexible filter screen in conjunction with a drive mechanism, a scraping mechanism, and an air jet mechanism. The movement of the flexible filter screen scrapes away surface dirt, while the air jet mechanism injects airflow into the filter holes to clear blockages.

Benefits of technology

It effectively prevents filter clogging, improves filtration efficiency, ensures the cleanliness of the filter surface and pores, and reduces the need for a power source.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides an anti-blocking filtering device for water pollution treatment. The anti-blocking filtering device comprises a shell, a first top roller and a second top roller are arranged on the two sides of the top of the flexible filter screen correspondingly. Bottom rollers are arranged on the two sides of the bottom of the flexible filter screen. The top of the flexible filter screen penetrates through side grooves formed in the two sides of the machine shell and the interior of the machine shell. The output end of the driving mechanism is connected with one end of the first top roller; the dirt guide cover is arranged on one side of the flexible filter screen, and a dirt scraping mechanism is arranged on the top side of the dirt guide cover; the air injection mechanism is arranged on the inner wall of the side, close to the sewage guide cover, of the flexible filter screen. The flexible filter screen is continuously conveyed and moved, dirt intercepted at the top is conveyed and discharged, when the flexible filter screen is continuously conveyed and moved, the dirt scraping mechanism scrapes the surface of the flexible filter screen and scrapes off the adhered dirt, and meanwhile, the air injection mechanism and the air injection mechanism are arranged and used for removing the dirt in the filter holes, so that the dirt removal efficiency is improved. And the overall anti-blocking effect is improved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the field of water pollution treatment, especially water pollution treatment anti -block filter device. BACKGROUND

[0002] The filtering link in water pollution treatment is the key step to remove impurities, suspended matters and other harmful substances in water to achieve the purpose of purifying water quality.

[0003] The existing sewage filter device intercepts dirt by a filter screen, and the dirt and impurities are easy to gather at the position of the filter screen during continuous sewage filtering operation, which may cause the filter screen to be blocked and affect the subsequent filtering operation. Some filter devices are provided with a dirt pushing mechanism above the filter screen to push the dirt and impurities gathered above the filter screen away. Although the dirt pushing mechanism has a certain effect of cleaning dirt and preventing blockage, it can only remove the dirt on the surface of the filter screen, and the dirt in the filter screen holes cannot be dredged and treated, so the effect of dredging and preventing blockage is poor. TECHNICAL SOLUTION

[0004] The utility model discloses a water pollution treatment anti -block filter device to solve the technical problem that the dredging and preventing blockage effect is poor.

[0005] The utility model discloses a water pollution treatment anti -block filter device to solve the technical problem that the dredging and preventing blockage effect is poor.

[0006] The utility model provides a water pollution treatment anti -block filter device, including the casing, still include: flexible filter screen, evenly be provided with a plurality of filter holes on the flexible filter screen, the top both sides of the flexible filter screen are provided with first top roller and second top roller, the bottom both sides of the flexible filter screen all are provided with bottom roller, the top of the flexible filter screen is penetrated and is set up in the side groove of the both sides of casing and the inside of casing, drive mechanism, the output of drive mechanism is connected with one end of first top roller, the dirt cover is set up in one side of flexible filter screen, and the top side of dirt cover is provided with scrape dirt mechanism, and the outer side wall of scrape dirt mechanism and filter screen abuts, jet mechanism, jet mechanism sets up in the inner wall place of one side of flexible filter screen close to dirt cover, and jet mechanism is located above the top side of dirt cover, jet mechanism is connected with gas injection mechanism, gas injection mechanism is connected with one end of first top roller through elevating gear.

[0007] In the technical scheme, the dirt intercepted on the top is transported and discharged by making the flexible filter screen continuously transport and move, and the dirt on the surface of the flexible filter screen is scraped off by the scraping mechanism when the flexible filter screen continuously transports and moves. At the same time, the dirt in the filter holes is removed by the setting of the jet mechanism and the gas injection mechanism, and the overall anti -block effect is improved.

[0008] Preferably, a rack is further included, which is fixedly connected with the outer wall of the shell; both ends of the bottom roller are rotatably connected with first end racks, which are fixedly connected with the rack; both ends of the first top roller and both ends of the second top roller are rotatably connected with second end racks, which are fixedly connected with the outer wall of the shell; the pollution guide cover is fixedly connected with the top of one side of the rack.

[0009] In the technical solution, the rack provides support for the height of the whole.

[0010] Preferably, a top cover is installed at the top of the shell; a water inlet pipe is arranged at the top of the top cover; a drain hopper is installed at the bottom of the shell; and a drain pipe is installed at the bottom end of the drain hopper.

[0011] In the technical solution, the water inlet pipe is used for water inlet, and the drain pipe is used for discharging filtered sewage.

[0012] Preferably, the pollution scraping mechanism includes a scraper; an installation groove is arranged at the top side of the pollution guide cover; the scraper is slidably installed in the installation groove, and a second spring in a compressed state is arranged in the installation groove; and the end of the scraper away from the second spring is attached to the outer side wall of the flexible filter screen.

[0013] In the technical solution, the pollution scraping mechanism is used for scraping off the dirt adhered to the flexible filter screen, thereby improving the dirt removal effect of the surface of the flexible filter screen.

[0014] Preferably, the driving mechanism includes a motor; the motor is fixedly installed on the outer wall of the shell; a first pulley is fixedly connected with the output end of the motor; a second pulley is fixedly connected with the end of the first top roller; and a transmission belt is arranged between the first pulley and the second pulley.

[0015] In the technical solution, the driving mechanism is used for driving the first top roller to rotate.

[0016] Preferably, the lifting mechanism includes a fixed seat and a movable seat; the fixed seat is fixedly connected with the outer wall of the shell; a vertical guide column is fixedly connected with the top of the fixed seat; a guide groove is arranged in the movable seat; the guide groove is connected with the guide column in a clearance fit; a plurality of first springs are arranged between the movable seat and the fixed seat; a cam is abutted with the top of the movable seat; and the cam is fixedly installed at the end of the first top roller away from the second pulley.

[0017] Preferably, a connecting rod is fixedly connected with one side of the movable seat; and a vertical movable rod is fixedly connected with the connecting rod.

[0018] In the technical solution, the lifting mechanism is used for driving the connecting rod to reciprocatingly move up and down.

[0019] Preferably, the number of the gas injection mechanisms is two, and the two gas injection mechanisms are symmetrically arranged at one side of the lifting mechanism.

[0020] Preferably, the gas injection mechanism comprises a gas cylinder; the gas cylinder is fixed to the outer wall of the shell, the gas cylinder is closed at one end away from the movable rod, and the other end is open, a piston is connected in the gas cylinder, the two pistons of the two gas injection mechanisms are respectively fixed to the two ends of the movable rod, the closed end of the gas cylinder is provided with a first one-way valve and a second one-way valve, and the second one-way valve is connected with a gas conveying pipe.

[0021] In the technical scheme, the gas injection mechanism is used for injecting gas flow into the gas injection mechanism.

[0022] Preferably, the gas injection mechanism comprises a straight pipe; one end of the straight pipe is closed, and the other end is open, the open end of the straight pipe is communicated with the gas conveying pipe, and the straight pipe is fixed to the outer wall of one side of the rack through a mounting frame, and a plurality of nozzles are arranged at equal intervals along the length direction of the side of the straight pipe close to the flexible filter screen.

[0023] In the technical scheme, the gas injection mechanism is used for blowing gas flow into the filter holes on the inner side of the flexible filter screen, and the dirt blocked in the filter holes is separated by gas pressure.

[0024] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be combined arbitrarily, that is, the preferred examples of the utility model are obtained.

[0025] The positive progress effect of the utility model is that:

[0026] The water pollution treatment anti-blocking filter device provided above filters sewage from the top of the flexible filter screen, and through the setting of the driving mechanism, the first top roller, the second top roller, the bottom roller and the flexible filter screen, in the process of sewage filtration, the driving mechanism continuously drives the first top roller to rotate, cooperates with the second top roller and the two bottom rollers, and moves the flexible filter screen in a circulating manner, transports the intercepted dirt to the dirt guide cover, and the dirt falls into the dirt guide cover through gravity, realizes the removal of the dirt, and avoids the long-term accumulation of the dirt on the top of the flexible filter screen; further, after the dirt is transported into the dirt guide cover, the scraping mechanism arranged on the top side of the dirt guide cover can scrape the outer surface of the flexible filter screen, scrape the adhered and adhered dirt, and enter the dirt guide cover, thereby improving the dirt removal effect of the surface of the flexible filter screen; further, the gas injection mechanism and the gas injection mechanism are provided, the gas injection mechanism injects high-pressure gas flow into the gas injection mechanism, the gas flow is sprayed from the inner side of the flexible filter screen through the gas injection mechanism, and the flexible filter screen continuously moves back and forth from the gas injection mechanism, and the dirt blocked in the filter holes is flushed out through the action of the gas pressure and enters the dirt guide cover, thereby realizing the cleaning of the filter holes and improving the effect of dirt removal and anti-blocking, and the gas injection mechanism is driven by the lifting mechanism, the lifting mechanism is connected with the first top roller, and the first top roller provides driving for the lifting mechanism when rotating, thereby driving the gas injection mechanism, so that the whole device only needs to set the driving mechanism as a power source, and does not need to set too many power sources. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the structure schematic view of the whole back surface of the utility model.

[0028] Figure 2 It is the installation structure schematic view of the flexible filter screen of the utility model.

[0029] Figure 3 It is the structure schematic view of the whole back surface of the utility model.

[0030] Figure 4 It is the structure schematic view of the driving mechanism, the first top roller and the cam of the utility model.

[0031] Figure 5 It is the structure schematic view of the lifting mechanism, the gas injection mechanism and the air injection mechanism of the utility model.

[0032] Figure 6 It is the structure schematic view of the pollution guide cover, the flexible filter screen and the air injection mechanism of the utility model.

[0033] Figure 7 It is the structure schematic view of the utility model Figure 6 A enlarged structure schematic view of the middle A part.

[0034] Explanation of reference signs

[0035] 1, rack;101, first end frame;2, machine shell;201, top cover;202, drainage hopper;203, drainage pipe;204, water inlet pipe;205, side groove;206, second end frame;3, flexible filter screen;301, filter hole;302, first top roller;303, second top roller;304, bottom roller;4, pollution guide cover;401, installation groove;5, driving mechanism;501, motor;502, first pulley;503, second pulley;504, transmission belt;6, lifting mechanism;601, cam;602, guide column;603, fixed seat;604, movable seat;605, first spring;606, connecting rod;607, movable rod;7, gas injection mechanism;701, air cylinder;702, first check valve;703, second check valve;704, gas conveying pipe;705, piston;8, air injection mechanism;801, straight pipe;802, nozzle;803, mounting frame;9, pollution scraping mechanism;901, scraper;902, second spring. DETAILED DESCRIPTION

[0036] The utility model will be further explained by way of embodiment below, but will not limit the utility model in the embodiment range because of this.

[0037] As Figures 1-7As shown, the water pollution treatment anti-blocking filter device comprises a shell 2; further comprising: a flexible filter screen 3, a plurality of filter holes 301 are uniformly arranged on the flexible filter screen 3; the top of the flexible filter screen 3 is provided with a first top roller 302 and a second top roller 303 on both sides; the bottom of the flexible filter screen 3 is provided with a bottom roller 304 on both sides; the top of the flexible filter screen 3 penetrates the side groove 205 provided on both sides of the shell 2 and the inside of the shell 2; a driving mechanism 5, the output end of the driving mechanism 5 is connected with one end of the first top roller 302; a pollution guide cover 4, the pollution guide cover 4 is arranged on one side of the flexible filter screen 3, and a dirt scraping mechanism 9 is arranged on the top side of the pollution guide cover 4, the dirt scraping mechanism 9 abuts against the outer side wall of the filter screen; a gas injection mechanism 8, the gas injection mechanism 8 is arranged on the inner wall of the side of the flexible filter screen 3 close to the pollution guide cover 4, and the gas injection mechanism 8 is located above the top side of the pollution guide cover 4; the gas injection mechanism 8 is connected with a gas injection mechanism 7; the gas injection mechanism 7 is connected with one end of the first top roller 302 through a lifting mechanism 6.

[0038] Further comprising a rack 1, the rack 1 is fixedly connected with the outer wall of the shell 2; the both ends of the bottom roller 304 are rotatably connected with a first end frame 101, the first end frame 101 is fixedly connected with the rack 1; the both ends of the first top roller 302 and the both ends of the second top roller 303 are rotatably connected with a second end frame 206, the second end frame 206 is fixedly connected with the outer wall of the shell 2; the pollution guide cover 4 is fixedly connected with the top of one side of the rack 1.

[0039] The top of the shell 2 is provided with a top cover 201; the top of the top cover 201 is provided with a water inlet pipe 204; the bottom of the shell 2 is provided with a water drain 202, and the bottom end of the water drain 202 is provided with a water drain pipe 203.

[0040] When sewage treatment is carried out, sewage enters the shell 2 through the water inlet pipe 204, falls into the water drain 202 after passing through the top of the flexible filter screen 3, and then is discharged from the water drain pipe 203; realizing the filtration treatment of sewage.

[0041] At the same time of sewage filtration treatment, the driving mechanism 5 drives the first top roller 302 to continuously rotate, cooperates with the second top roller 303 and the two bottom rollers 304, so that the flexible filter screen 3 is circulated and moved, and the dirt intercepted by the flexible filter screen 3 is transported to the pollution guide cover 4, and the dirt falls into the pollution guide cover 4 by gravity and is discharged through the pollution guide cover 4.

[0042] By continuously transporting and discharging the dirt intercepted by the filter, the dirt is prevented from gathering on the top of the flexible filter screen 3, and the anti-blocking effect is achieved.

[0043] It should be noted that the height of the first top roller 302 is greater than the height of the second top roller 303, so that the top of the flexible filter screen 3 forms an inclined surface to the pollution guide cover 4, facilitating the transportation of dirt to the pollution guide cover 4.

[0044] The flexible filter screen 3 can be made of rubber.

[0045] As shown in Figures 6-7 , the scraping mechanism 9 comprises a scraper 901; the top side of the dirt guide cover 4 is provided with a mounting groove 401; the scraper 901 is slidingly installed into the mounting groove 401, and the mounting groove 401 is provided with a second spring 902 in a compressed state, and the end of the scraper 901 away from the second spring 902 is attached to the outer side wall of the flexible filter screen 3.

[0046] After the flexible filter screen 3 conveys and discharges dirt, it passes through the scraping mechanism 9, wherein the elastic force of the second spring 902 acts on the scraper 901, so that the end of the scraper 901 is pressed against the surface of the flexible filter screen 3, and the dirt adhering to the flexible filter screen 3 can be scraped off, and the scraped dirt enters the dirt guide cover 4. Through the design of the scraping mechanism 9, the dirt removal effect of the surface of the flexible filter screen 3 is improved.

[0047] As shown in Figure 4 , the driving mechanism 5 comprises a motor 501; the motor 501 is fixedly installed on the outer wall of the casing 2, the output end of the motor 501 is fixedly connected with a first pulley 502, the end of the first top roller 302 is fixedly connected with a second pulley 503, and the first pulley 502 and the second pulley 503 are provided with a transmission belt 504 therebetween.

[0048] The first pulley 502 is driven to rotate by the motor 501, and the second pulley 503 and the first top roller 302 are driven to rotate by the transmission belt 504.

[0049] As shown in Figure 5 , the lifting mechanism 6 comprises a fixed seat 603 and a movable seat 604; the fixed seat 603 is fixedly connected with the outer wall of the casing 2, the top of the fixed seat 603 is fixedly connected with a vertically arranged guide column 602, the movable seat 604 is provided with a guide groove, the guide groove is connected with the guide column 602 in a clearance fit, a plurality of first springs 605 are arranged between the movable seat 604 and the fixed seat 603, the top of the movable seat 604 is abutted with a cam 601, and the cam 601 is fixedly installed on the end of the first top roller 302 away from the second pulley 503. One side of the movable seat 604 is fixedly connected with a connecting rod 606; the connecting rod 606 is fixedly connected with a vertically arranged movable rod 607.

[0050] As shown in Figure 5As shown, there are two air injection mechanisms 7, which are symmetrically arranged on one side of the lifting mechanism 6. Each air injection mechanism 7 includes an air cylinder 701; the air cylinder 701 is fixedly connected to the outer wall of the housing 2, and one end of the air cylinder 701 away from the movable rod 607 is closed, while the other end is open. A piston 705 is connected inside the air cylinder 701. The pistons 705 of the two air injection mechanisms 7 are respectively fixedly connected to both ends of the movable rod 607. A first one-way valve 702 and a second one-way valve 703 are installed at the closed end of the air cylinder 701. The second one-way valve 703 is connected to an air supply pipe 704.

[0051] As the first top roller 302 rotates continuously, the cam 601 rotates together. Through the compression of the cam 601 and the restoring force of the first spring 605, the movable seat 604 moves up and down reciprocally in the vertical direction. Its up and down movement is guided by the guide post 602 and the guide groove. At the same time, the movable seat 604 drives the movable rod 607 to move together through the connecting rod 606.

[0052] When the movable rod 607 moves upward, the piston 705 in the air injection mechanism 7 located at the top of the movable rod 607 moves upward to compress the air in the air cylinder 701. The air enters the air supply pipe 704 through the second one-way valve 703. Meanwhile, the piston 705 in the air injection mechanism 7 located at the bottom of the movable rod 607 moves upward, and the air cylinder 701 draws in external air through the first one-way valve 702. When the movable rod 607 moves downward, the piston 705 in the air injection mechanism 7 located at the top of the movable rod 607 moves downward, and the air cylinder 701 draws in external air through the first one-way valve 702. Meanwhile, the piston 705 in the air injection mechanism 7 located at the bottom of the movable rod 607 moves downward to compress the air in the air cylinder 701. The air enters the air supply pipe 704 through the second one-way valve 703.

[0053] In summary, as the flexible filter 3 continues to move, the movable rod 607, regardless of its up-and-down movement, inputs airflow into the air supply pipe 704.

[0054] like Figures 5-6 As shown, the jet mechanism 8 includes a straight pipe 801; one end of the straight pipe 801 is closed and the other end is open. The open end of the straight pipe 801 is connected to the air supply pipe 704, and the straight pipe 801 is fixed to the outer wall of one side of the frame 1 through the mounting bracket 803. Multiple nozzles 802 are equally spaced along the length direction on the side of the straight pipe 801 near the flexible filter screen 3.

[0055] The air injection mechanism 8 is used for removing dirt in the filter holes 301, further improving the anti-blocking effect, specifically, the air flow output by the air pipe 704 enters the straight pipe 801 in the air injection mechanism 8, the straight pipe 801 delivers the air flow to the nozzle 802, the air flow is sprayed to the filter holes 301 of the flexible filter screen 3 through the nozzle 802, the dirt in the filter holes 301 is flushed out through air pressure, and the dirt enters the dirt guide cover 4 and is discharged.

[0056] The whole device guarantees the dirt removal effect of the flexible filter screen 3 by delivering and discharging the dirt on the flexible filter screen 3, scraping the surface of the flexible filter screen 3 by the scraping mechanism 9 and cleaning the dirt in the filter holes 301 by the air injection mechanism 8, and plays the role of anti-blocking.

[0057] The utility model is not limited to the above-mentioned embodiment, no matter makes any change in its shape or structure, all fall in the protection scope of the utility model. The protection scope of the utility model is defined by the appended claims, and the skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the utility model, but these changes and modifications all fall into the protection scope of the utility model.

Claims

1. A water pollution treatment anti-blocking filter device, comprising a casing (2); characterized in that, Also include: Flexible filter screen (3), a plurality of filter holes (301) are uniformly arranged on the flexible filter screen (3); the top of the flexible filter screen (3) is provided with a first top roller (302) and a second top roller (303) on both sides respectively; the bottom of the flexible filter screen (3) is provided with a bottom roller (304) on both sides; the top of the flexible filter screen (3) penetrates the side groove (205) provided on both sides of the shell (2) and the inside of the shell (2); Driving mechanism (5), the output end of the driving mechanism (5) is connected with one end of the first top roller (302); The dirt guide cover (4) is arranged on one side of the flexible filter screen (3), and the top side of the dirt guide cover (4) is provided with a dirt scraping mechanism (9), which is in abutment with the outer side wall of the filter screen; The air injection mechanism (8) is arranged on the inner wall of the side of the flexible filter screen (3) close to the dirt guide cover (4), and the air injection mechanism (8) is located above the top side of the dirt guide cover (4); The air injection mechanism (8) is connected with the gas injection mechanism (7); the gas injection mechanism (7) is connected with one end of the first top roller (302) through the lifting mechanism (6).

2. The anti-clogging filter apparatus for water pollution treatment according to claim 1, wherein: Also include the rack (1), the rack (1) is fixedly connected with the outer wall of the shell (2); the both ends of the bottom roller (304) are rotatably connected with the first end frame (101), and the first end frame (101) is fixedly connected with the rack (1); the both ends of the first top roller (302) and the both ends of the second top roller (303) are rotatably connected with the second end frame (206), and the second end frame (206) is fixedly connected with the outer wall of the shell (2); the dirt guide cover (4) is fixedly connected with the top of one side of the rack (1).

3. The anti-clogging filter apparatus for water pollution treatment according to claim 1, wherein: The top of the shell (2) is provided with a top cover (201); the top of the top cover (201) is provided with a water inlet pipe (204), and the bottom of the shell (2) is provided with a drain pan (202); the bottom end of the drain pan (202) is provided with a drain pipe (203).

4. The anti-clogging filter apparatus for water pollution treatment according to claim 1, wherein: The dirt scraping mechanism (9) comprises a scraper (901); the top side of the dirt guide cover (4) is provided with a mounting groove (401); the scraper (901) is slidably mounted into the mounting groove (401), and the mounting groove (401) is provided with a second spring (902) in a compressed state; the end of the scraper (901) away from the second spring (902) is in abutment with the outer side wall of the flexible filter screen (3).

5. The anti-clogging filter apparatus for water pollution treatment of claim 1, wherein: The driving mechanism (5) comprises a motor (501); the motor (501) is fixedly mounted on the outer wall of the shell (2), the output end of the motor (501) is fixedly connected with a first pulley (502), and the end of the first top roller (302) is fixedly connected with a second pulley (503); the first pulley (502) and the second pulley (503) are provided with a transmission belt (504) therebetween.

6. The anti-clogging filter apparatus for water pollution treatment according to claim 5, wherein: The lifting mechanism (6) comprises a fixed seat (603) and a movable seat (604); the fixed seat (603) is fixedly connected with the outer wall of the shell (2), the top of the fixed seat (603) is fixedly connected with a vertical guide column (602), the movable seat (604) is provided with a guide groove, the guide groove is connected with the guide column (602) in a clearance fit, a plurality of first springs (605) are arranged between the movable seat (604) and the fixed seat (603), the top of the movable seat (604) is abutted with a cam (601), and the cam (601) is fixedly installed on one end of the first top roller (302) away from the second belt pulley (503).

7. The anti-clogging filter apparatus for water pollution treatment according to claim 6, wherein: One side of the movable seat (604) is fixedly connected with a connecting rod (606); the connecting rod (606) is fixedly connected with a vertical movable rod (607).

8. The anti-clogging filter apparatus for water pollution treatment according to claim 7, wherein: The number of the gas injection mechanisms (7) is two, and the two gas injection mechanisms (7) are symmetrically arranged on one side of the lifting mechanism (6).

9. The anti-clogging filter apparatus for water pollution treatment as claimed in claim 8, wherein: The gas injection mechanism (7) comprises a gas cylinder (701); the gas cylinder (701) is fixedly connected with the outer wall of the shell (2), one end of the gas cylinder (701) is closed, the other end is open, the gas cylinder (701) is matched and connected with a piston (705) inside, the pistons (705) of the two gas injection mechanisms (7) are respectively fixedly connected with two ends of the movable rod (607), the closed end of the gas cylinder (701) is provided with a first one-way valve (702) and a second one-way valve (703), and the second one-way valve (703) is connected with a gas conveying pipe (704).

10. The clog resistant filter apparatus for water pollution treatment of claim 1, wherein: The gas injection mechanism (8) comprises a straight pipe (801); one end of the straight pipe (801) is closed, the other end is open, the open end of the straight pipe (801) is communicated with the gas conveying pipe (704), the straight pipe (801) is fixedly connected with one side of the outer wall of the rack (1) through a mounting frame (803), and a plurality of nozzles (802) are arranged on one side of the straight pipe (801) close to the flexible filter screen (3) at equal intervals along the length direction.