CN220811899U

CN220811899U - Sewage treatment filter equipment

Info

Publication number: CN220811899U
Application number: CN202322383430.3U
Authority: CN
Inventors: 徐鹏; 毛熊; 胡燕柳
Original assignee: Hunan Zhongmiao Environmental Protection Technology Co ltd
Current assignee: Hunan Zhongmiao Environmental Protection Technology Co ltd
Priority date: 2023-09-04
Filing date: 2023-09-04
Publication date: 2024-04-19
Anticipated expiration: 2033-09-04

Abstract

The utility model discloses a sewage treatment filtering device which comprises a base, a filtering tank, a rotating seat structure, a detachable filter cartridge structure, a detachable top cover structure, a sealing structure and an anti-blocking brushing structure, wherein a plurality of universal wheels with a brake mechanism are arranged at the bottom of the base, the filtering tank is fixedly erected and installed on the upper surface of the base through a plurality of supporting legs, the top of the filtering tank is in an open type design, a drain pipe is arranged at the bottom of one side of the filtering tank, the rotating seat structure is installed on the upper surface of the base and the bottom end of the inside of the filtering tank, and the detachable filter cartridge structure is installed at the rotating seat structure. The utility model further effectively improves the anti-blocking effect on the basis of the original structure, and is convenient for disassembling and taking out the anti-blocking related structure, so that the cleaning and cleaning can be conveniently and rapidly carried out, the cleaning and cleaning work in the device is not needed, the time and the labor are saved, and the efficiency is higher.

Description

Sewage treatment filter equipment

Technical Field

The utility model relates to the technical field of sewage treatment equipment, in particular to a sewage treatment and filtration device.

Background

The water resource is an important resource which can not be separated in survival and life, a great amount of sewage can be generated by the activities of human beings, if the sewage is not well treated, the sewage can be polluted to the water source, the life of people is seriously influenced, and for the water source polluted by the sewage, the sewage treatment and filtration device is more commonly used for filtering impurities in the sewage to purify the sewage, as follows.

Through retrieving, the patent of granting publication number CN214019514U, disclose a sewage treatment filter equipment, including shell body and filter core, one side of shell body is equipped with the water inlet, and the inner chamber intercommunication of shell body is equipped with outer filter screen and the interior filter screen of setting in outer filter screen between upper plate and the lower plate including upper plate and lower plate, interior filter screen and the passageway intercommunication of setting on the lower plate, the lower plate is with the recess adaptation of setting in the inner chamber, and during the use, sewage gets into in the inner chamber through the water inlet, gets into in the interior filter screen through filter rod and outer filter screen, and filter rod can hang impurity such as rag, avoids filter core to be plugged up, and the multiple filtration of outer filter screen and interior filter screen can improve sewage treatment filter equipment's sewage purifying effect, and the sewage after the filter core filters flows in the cavity from the passageway, and the rethread water pump is taken out, makes the cavity produce certain negative pressure to speed of flow of sewage in the inner chamber has improved sewage treatment filter equipment's filtration efficiency.

However, the above patent also has the following optimizations:

In the actual working and use process, although impurities such as broken cloth can be hung through a plurality of filter rods, some smaller impurities can easily pass through a plurality of filter rods and enter the positions of the outer filter screen and the inner filter screen, so that the outer filter screen or the inner filter screen is at a larger blocking risk, normal filtering work can be influenced, and the filter rods are located in the outer shell, so that the broken cloth impurities hung on the filter rods are inconvenient to clean, the cleaning work is time-consuming and labor-consuming, the whole structure of the filter screen is to be improved, and the practicability is to be improved.

Disclosure of utility model

The utility model aims to provide a sewage treatment filtering device, which solves the problems that in the actual working and use process of the sewage treatment filtering device, although impurities such as broken cloth can be hung by a plurality of filtering rods, smaller impurities can easily pass through the plurality of filtering rods to enter the positions of an outer filtering net and an inner filtering net, so that the outer filtering net or the inner filtering net has larger blocking risk, normal filtering work is influenced, and the plurality of filtering rods are positioned in the inner part of an outer shell, so that the cleaning treatment of the broken cloth impurities hung on the plurality of filtering rods is inconvenient to follow, the cleaning work is time-consuming and labor-consuming, the whole structure of the sewage treatment filtering device is required to be improved, and the practicability is required to be improved.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a sewage treatment filter equipment, includes base, filtration jar, roating seat structure, can dismantle and strain the tube structure, can dismantle top cap structure, seal structure and prevent blockking up the brush and sweep the structure, the bottom department of base is equipped with a plurality of universal wheels that have brake mechanism, the filtration jar is installed in the upper surface department of base through a plurality of supporting leg fixed frame, the top of filtration jar is open-type design, one side bottom department of filtration jar is equipped with the drain pipe, the roating seat structure is installed in the upper surface of base and the inside bottom department of filtration jar, can dismantle and strain tube structure and install in roating seat structure department, can dismantle top cap structure and install in the top department of filtration jar, seal structure installs in can dismantle top cap structure department, just seal structure and can dismantle and strain tube structure contact with dismantling to strain the structure, prevent blockking up the brush and sweep structure and contact equally.

Preferably, the rotary seat structure comprises a motor and a clamping seat, the motor is fixedly arranged at the upper surface of the base, a rotating shaft is arranged at the output end of the motor, the top end of the rotating shaft movably penetrates through the bottom of the filter tank and extends into the filter tank, the rotating shaft penetrates through the filter tank to be subjected to sealing treatment, the bottom of the clamping seat is fixedly connected with the top end of the rotating shaft, a plurality of supporting columns are arranged at the bottom of the clamping seat, a plurality of balls are respectively arranged at the bottom of the supporting columns in an embedded type, the balls are in contact with the inner bottom surface of the filter tank, and a cross-shaped clamping groove is formed in the top of the clamping seat.

Preferably, the detachable filter cartridge structure comprises an outer filter cartridge and an inner filter cartridge, the inner filter cartridge is fixedly arranged in the outer filter cartridge, a gap is formed between the outer side of the inner filter cartridge and the inner side of the outer filter cartridge, the tops of the inner filter cartridge and the outer filter cartridge are both in an open type design, the top height of the inner filter cartridge is lower than that of the outer filter cartridge, a cross-shaped clamping plate is arranged at the bottom of the outer filter cartridge and is clamped with the clamping groove, a plurality of filter screen holes are formed in the periphery of the outer filter cartridge and the periphery of the inner filter cartridge, and the pore diameter of the filter screen holes in the periphery of the inner filter cartridge is larger than that in the periphery of the outer filter cartridge.

Preferably, the detachable top cover structure comprises two connecting lugs A and a top cover main body, wherein the two connecting lugs A are respectively fixedly arranged at two sides of the outside of the filter tank, the top cover main body is covered at the top opening of the filter tank, two connecting lugs B are respectively arranged at two sides of the top cover main body, the connecting lugs B are fixedly connected with the connecting lugs A through fastening knobs, two handles and a water inlet funnel are arranged at the top of the top cover main body, a water inlet pipe is arranged at the bottom of the top cover main body, the water inlet pipe is communicated with the water inlet funnel, and the bottom of the water inlet pipe extends into the interior of the inner filter cylinder.

Preferably, the sealing structure comprises two fixing sleeves, two sealing plates A and two sealing plates B, wherein the two fixing sleeves are respectively sleeved on the outer part of the water inlet pipe in a welding mode, movable grooves are formed in the outer surface of the fixing sleeves, the sealing plates A and the sealing plates B are respectively sleeved in the movable grooves in the outer sides of the two fixing sleeves in a movable mode, sealing cushion layers are respectively arranged at the bottoms of the sealing plates A and the sealing plates B, and the two sealing cushion layers are respectively abutted to top opening parts of the inner filter cylinder and the outer filter cylinder.

Preferably, the anti-blocking brushing structure comprises a scraping rod A and a scraping rod B, wherein the scraping rod A and the scraping rod B are both provided with two, the scraping rod A and the scraping rod B are both in an L shape, the scraping rod A is respectively and fixedly installed at two sides of the outside of the water inlet pipe, the scraping rod B is also respectively and fixedly installed at two sides of the outside of the water inlet pipe, the scraping rod A is close to the inner side of the inner filter cylinder, the scraping rod B is located in a gap between the inner filter cylinder and the outer filter cylinder, bristles are arranged at one sides of the scraping rod A and the scraping rod B, the bristles at the scraping rod A are in contact with the inner side of the inner filter cylinder, and the bristles at the scraping rod B are in contact with the inner side of the outer filter cylinder.

The utility model provides a sewage treatment and filtration device, which has the following beneficial effects:

According to the utility model, the base, the filter tank, the rotating seat structure, the detachable filter cylinder structure, the detachable top cover structure, the sealing structure and the anti-blocking brushing structure are arranged, so that when the filter tank is in operation, sewage can be conveyed into the filter tank through the water inlet funnel matched with the water inlet pipe, then the sewage can be subjected to double effective impurity filtering treatment through the matching between the inner filter cylinder and the outer filter cylinder, and finally discharged through the water outlet pipe, in the process, the clamping seat is driven to rotate through the starting motor, so that the inner filter cylinder and the outer filter cylinder are driven to rotate, the filtering efficiency can be accelerated through centrifugal force, and when the inner filter cylinder and the outer filter cylinder rotate, the scraping rod A and the scraping rod B are fixedly arranged at the outer side of the water inlet pipe, so that brushing treatment can be continuously carried out on the inner side of the inner filter cylinder and the outer filter cylinder, the normal filtering work can be effectively prevented from being influenced by the inner filter cylinder and the outer filter cylinder at the blocking position, the anti-blocking effect is further improved on the original basis, and the practicability of the filter tank is effectively improved.

Further, the filter tank can be taken out together by removing the top cover main body, the scraping rod A, the scraping rod B, the inner filter cylinder and the outer filter cylinder, and the filter tank is cleaned conveniently and rapidly without cleaning in the filter tank, so that time and labor are saved, and the efficiency is high.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic top view of the clamping seat of the present utility model;

FIG. 3 is a schematic elevational, cross-sectional view of the inner cartridge assembly of the present utility model;

fig. 4 is a schematic view showing the mounting and bottom-up structure of the sealing plate a of the present utility model;

fig. 5 is a schematic front view of the fixing sleeve of the present utility model.

In the figure: 1. a base; 2. a filter tank; 3. a drain pipe; 4. a motor; 5. a clamping seat; 6. a rotating shaft; 7. a support column; 8. a clamping groove; 9. an outer filter cartridge; 10. an inner filter cartridge; 11. a connecting lug A; 12. a top cover main body; 13. a connecting lug B; 14. fastening a knob; 15. a water inlet funnel; 16. a water inlet pipe; 17. a fixed sleeve; 18. sealing plate A; 19. a sealing plate B; 20. a movable groove; 21. a sealing cushion layer; 22. a scraping rod A; 23. a scraping rod B; 24. and (5) clamping plates.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

As shown in fig. 1-5, the present utility model provides a technical solution: the utility model provides a sewage treatment filter equipment, includes base 1, filtration jar 2, roating seat structure, can dismantle and strain a section of thick bamboo structure, can dismantle top cap structure, seal structure and prevent blockking up the brush structure, the bottom department of base 1 is equipped with a plurality of universal wheels that have brake mechanism, filtration jar 2 is installed in the upper surface department of base 1 through a plurality of supporting legs fixed establishment, the top of filtration jar 2 is open-type design, one side bottom department of filtration jar 2 is equipped with drain pipe 3, roating seat structure installs in the upper surface of base 1 and the inside bottom department of filtration jar 2, can dismantle and strain a section of thick bamboo structure and install in roating seat structure department, can dismantle top cap structure installs in the top department of filtration jar 2, seal structure installs in can dismantle top cap structure department, just seal structure and can dismantle and strain a section of thick bamboo structure contact, prevent blockking up the brush and sweep structure and install in can dismantle top cap structure department, just prevent blockking up and sweep structure and equally with can dismantle a section of thick bamboo structure contact.

The rotary seat structure comprises a motor 4 and a clamping seat 5, the motor 4 is fixedly arranged at the upper surface of the base 1, a rotary shaft 6 is arranged at the output end of the motor 4, the top end of the rotary shaft 6 movably penetrates through the bottom of the filter tank 2 and extends into the filter tank, the rotary shaft 6 penetrates through the filter tank 2 to be subjected to sealing treatment, the bottom of the clamping seat 5 is fixedly connected with the top end of the rotary shaft 6, a plurality of supporting columns 7 are arranged at the bottom of the clamping seat 5, balls are respectively arranged at the bottoms of the supporting columns 7 in an embedded type and movably, the balls are in contact with the inner bottom surface of the filter tank 2, a cross-shaped clamping groove 8 is formed at the top of the clamping seat 5, so that the clamping seat 5 can be driven to rotate by starting the motor 4 and being matched with the rotary shaft 6, and thus a clamping plate 24 is driven to rotate an outer filter cylinder 9 and an inner filter cylinder 10, and when the clamping seat 5 rotates, the supporting columns 7 can be matched with the balls, and the stability when the clamping seat 5 rotates is improved;

The detachable filter cartridge structure comprises an outer filter cartridge 9 and an inner filter cartridge 10, the inner filter cartridge 10 is fixedly arranged in the outer filter cartridge 9, a gap is formed between the outer side of the inner filter cartridge 10 and the inner side of the outer filter cartridge 9, the tops of the inner filter cartridge 10 and the outer filter cartridge 9 are respectively in an open design, the top height of the inner filter cartridge 10 is lower than that of the outer filter cartridge 9, a cross-shaped clamping plate 24 is arranged at the bottom of the outer filter cartridge 9, the clamping plate 24 is clamped with the clamping groove 8, a plurality of filter screen holes are formed in the periphery of the outer filter cartridge 9 and the inner filter cartridge 10, and the pore diameter of the filter screen holes in the periphery of the inner filter cartridge 10 is larger than that of the filter screen holes in the periphery of the outer filter cartridge 9, so that when the clamping seat 5 rotates, the outer filter cartridge 9 can be matched with the clamping between the clamping plate 24 and the clamping groove 8 to rotate together with the clamping seat 5, and the inner filter cartridge 10 is driven to rotate together;

The detachable top cover structure comprises two connecting lugs A11 and a top cover main body 12, wherein the two connecting lugs A11 are respectively and fixedly arranged at two outer sides of the filter tank 2, the top cover main body 12 is covered at the top opening of the filter tank 2, two connecting lugs B13 are respectively arranged at two sides of the top cover main body 12, the connecting lugs B13 are fixedly connected with the connecting lugs A11 through fastening knobs 14, two handles and a water inlet funnel 15 are arranged at the top of the top cover main body 12, a water inlet pipe 16 is arranged at the bottom of the top cover main body 12, the water inlet pipe 16 is communicated with the water inlet funnel 15, and the bottom of the water inlet pipe 16 extends into the interior of the inner filter cylinder 10, so that the top cover main body 12 can be detached by loosening the two fastening knobs 14, and the filter tank 2 is detached together with the water inlet pipe 16;

the sealing structure comprises two fixing sleeves 17, sealing plates A18 and sealing plates B19, wherein the two fixing sleeves 17 are arranged, the two fixing sleeves 17 are all sleeved outside the water inlet pipe 16 in a welding mode, movable grooves 20 are formed in the outer surfaces of the fixing sleeves 17, the sealing plates A18 and the sealing plates B19 are respectively sleeved in the movable grooves 20 on the outer sides of the two fixing sleeves 17 in a movable mode, sealing cushion layers 21 are arranged at the bottoms of the sealing plates A18 and the sealing plates B19, the two sealing cushion layers 21 are respectively abutted to the top openings of the inner filter cylinder 10 and the outer filter cylinder 9, so that the top openings of the inner filter cylinder 10 and the outer filter cylinder 9 can be sealed through the sealing plates A18 and the sealing plates B19, sewage is prevented from being discharged without being filtered, and when the inner filter cylinder 10 and the outer filter cylinder 9 rotate, the sealing plates A18 and the sealing plates B19 can be matched with the movable sleeves between the fixing sleeves 17 and rotate along with the rotation of the inner filter cylinder 10 and the outer filter cylinder 9;

The anti-clogging brushing structure comprises a scraping rod A22 and a scraping rod B23, wherein the scraping rod A22 and the scraping rod B23 are respectively provided with two scraping rods, the scraping rod A22 and the scraping rod B23 are respectively in an L shape, the scraping rods A22 are respectively fixedly installed at two sides of the outside of the water inlet pipe 16, the scraping rods B23 are respectively fixedly installed at two sides of the outside of the water inlet pipe 16, the scraping rods A22 are close to the inner side of the inner filter cylinder 10, the scraping rods B23 are positioned in a gap between the inner filter cylinder 10 and the outer filter cylinder 9, bristles at the scraping rods A22 and the scraping rods B23 are respectively provided with bristles, and the bristles at the scraping rods A22 are contacted with the inner side of the inner filter cylinder 10, so that when the inner filter cylinder 10 and the outer filter cylinder 9 rotate, the bristles at the scraping rods A22 and the scraping rods B23 are fixed, the inner side surfaces of the inner filter cylinder 10 and the outer filter cylinder 9 in the rotating process can be continuously brushed, and the inner filter cylinder 9 can be effectively prevented from being influenced by the bristles, and the normal filter cylinder 9 can be effectively prevented from being blocked by the filter cylinder.

Working principle: during operation, sewage can be conveyed into the interior of the filter tank 2 through the water inlet funnel 15 and the water inlet pipe 16, when the sewage enters the filter tank 2, the sewage can be discharged through the water discharge pipe 3 only through the inner filter cylinder 10 and the outer filter cylinder 9, so that effective double filtration treatment can be carried out on impurities in the sewage through the inner filter cylinder 10 and the outer filter cylinder 9, in the process, the clamping seat 5 is driven to rotate through the starting motor 4 and the rotating shaft 6, thereby the clamping plate 24 is matched to drive the outer filter cylinder 9 and the inner filter cylinder 10 to rotate, the supporting column 7 can be matched with the ball when the clamping seat 5 rotates, the stability of the clamping seat 5 is improved, the sewage filtration efficiency can be effectively improved by utilizing the generated centrifugal force when the outer filter cylinder 9 and the inner filter cylinder 10 rotate, and the top openings of the inner filter cylinder 10 and the outer filter cylinder 9 can be sealed through the sealing plate A18 and the sealing plate B19 when the inner filter cylinder 10 and the outer filter cylinder 9 rotate, the sewage is prevented from being discharged without being filtered, the sealing plate A18 and the sealing plate B19 can be matched with the movable sleeve joint between the sealing plate A18 and the fixed sleeve 17, the sealing plate A18 and the sealing plate B19 rotate along with the rotation of the inner filter cylinder 10 and the outer filter cylinder 9, meanwhile, the scraping rod A22 and the scraping rod B23 are fixed, so that the inner side surfaces of the inner filter cylinder 10 and the outer filter cylinder 9 in the rotation process can be matched with the bristles arranged on the sealing plate A22 and the scraping rod B23 to continuously brush, thereby effectively preventing impurity particles from blocking the inner filter cylinder 10 and the outer filter cylinder 9, further effectively avoiding affecting the normal sewage filtering work, after the sewage filtering treatment is completed, the top cover main body 12 can be detached by loosening the two fastening knobs 14, the water inlet pipe 16, the sealing plate A18, the sealing plate B19, the scraping rod A22 and the scraping rod B23 are taken out of the filter tank 2 together, and the outer filter cylinder 9 and the inner filter cylinder 10 are then removed, the structure can be cleaned conveniently and rapidly, cleaning work is not required to be performed in the filter tank 2, time and labor are saved, and efficiency is high.

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

Claims

1. The utility model provides a sewage treatment filter equipment, includes base (1), filtration jar (2), roating seat structure, can dismantle and strain a section of thick bamboo structure, can dismantle top cap structure, seal structure and prevent blockking up the brush and sweep structure, its characterized in that: the bottom department of base (1) is equipped with a plurality of universal wheels that have brake mechanism, filtration jar (2) are installed in the upper surface department of base (1) through a plurality of supporting legs fixed establishment, the top of filtration jar (2) is open-type design, one side bottom department of filtration jar (2) is equipped with drain pipe (3), roating seat structure installs in the inside bottom department of upper surface and filtration jar (2) of base (1), can dismantle and strain a section of thick bamboo structure and install in roating seat structure department, can dismantle top cap structure installs in the top department of filtration jar (2), seal the structure and install in can dismantle top cap structure department, just seal the structure with can dismantle and strain a section of thick bamboo structure contact, prevent blockking up and brush and sweep the structure and install in can dismantle top cap structure department, just prevent blockking up and brush and sweep the structure and contact equally.

2. A sewage treatment filtration device according to claim 1, wherein: the rotary seat structure comprises a motor (4) and a clamping seat (5), wherein the motor (4) is fixedly arranged at the upper surface of a base (1), a rotating shaft (6) is arranged at the output end of the motor (4), the top end of the rotating shaft (6) movably penetrates through the bottom of a filter tank (2) and extends into the filter tank, the rotating shaft (6) penetrates through the filter tank (2) and is subjected to sealing treatment, the bottom of the clamping seat (5) is fixedly connected with the top end of the rotating shaft (6), a plurality of supporting columns (7) are arranged at the bottom of the clamping seat (5), balls are movably arranged at the bottoms of the supporting columns (7) in an embedded mode, the balls are in contact with the inner bottom surface of the filter tank (2), and a cross-shaped clamping groove (8) is formed in the top of the clamping seat (5).

3. A sewage treatment filtration device according to claim 1, wherein: the detachable filter cartridge structure comprises an outer filter cartridge (9) and an inner filter cartridge (10), wherein the inner filter cartridge (10) is fixedly arranged in the outer filter cartridge (9), a gap is formed between the outer side of the inner filter cartridge (10) and the inner side of the outer filter cartridge (9), the tops of the inner filter cartridge (10) and the outer filter cartridge (9) are designed in an opening mode, the top height of the inner filter cartridge (10) is lower than that of the outer filter cartridge (9), a cross-shaped clamping plate (24) is arranged at the bottom of the outer filter cartridge (9), the clamping plate (24) is clamped with the clamping groove (8), a plurality of filter screen holes are formed in the periphery of the outer filter cartridge (9) and the periphery of the inner filter cartridge (10), and the pore diameter of the filter screen holes in the periphery of the inner filter cartridge (10) is larger than that of the filter screen holes in the periphery of the outer filter cartridge (9).

4. A sewage treatment filtration device according to claim 1, wherein: can dismantle top cap structure includes engaging lug A (11) and top cap main part (12), engaging lug A (11) are equipped with two, two engaging lug A (11) are fixed mounting respectively in the outside both sides department of filtration jar (2), top cap main part (12) lid dress is in the open top department of filtration jar (2), each is equipped with an engaging lug B (13) in the both sides department of top cap main part (12), through fastening knob (14) fastening connection between engaging lug B (13) and the engaging lug A (11), the top department of top cap main part (12) is equipped with two handles and one water inlet funnel (15), the bottom department of top cap main part (12) is equipped with inlet tube (16), inlet tube (16) and water inlet funnel (15) intercommunication, in the inside of filter tube (16) bottom extension to interior section of straining (10).

5. A sewage treatment filtration device according to claim 1, wherein: the sealing structure comprises fixing sleeves (17), sealing plates A (18) and sealing plates B (19), wherein the fixing sleeves (17) are arranged in two, the fixing sleeves (17) are welded and sleeved on the outer parts of the water inlet pipes (16), movable grooves (20) are formed in the outer surfaces of the fixing sleeves (17), the sealing plates A (18) and the sealing plates B (19) are respectively movably sleeved in the movable grooves (20) on the outer sides of the two fixing sleeves (17), sealing cushion layers (21) are arranged at the bottoms of the sealing plates A (18) and the sealing plates B (19), and the sealing cushion layers (21) are respectively abutted to top openings of the inner filter cylinders (10) and the outer filter cylinders (9).

6. A sewage treatment filtration device according to claim 1, wherein: the anti-blocking brushing structure comprises a scraping rod A (22) and a scraping rod B (23), wherein the scraping rod A (22) and the scraping rod B (23) are respectively provided with two bristles, the scraping rod A (22) and the scraping rod B (23) are respectively in an L shape, the scraping rod A (22) is respectively fixedly installed at two outer sides of a water inlet pipe (16), the scraping rod B (23) is respectively fixedly installed at two outer sides of the water inlet pipe (16), the scraping rod A (22) is close to the inner side of an inner filter cylinder (10), the scraping rod B (23) is located in a gap between the inner filter cylinder (10) and an outer filter cylinder (9), the bristles at one sides of the scraping rod A (22) and the scraping rod B (23) are respectively provided with bristles, and the bristles at the scraping rod A (22) are contacted with the inner side of the inner filter cylinder (10), and the bristles at the scraping rod B (23) are contacted with the inner side of the outer filter cylinder (9).