CN216366907U

CN216366907U - Convenient independent multi-layer filtering device who changes

Info

Publication number: CN216366907U
Application number: CN202122998073.2U
Authority: CN
Inventors: 李忠云
Original assignee: Wuxi Huaertai Machinery Manufacture Co ltd
Current assignee: Wuxi Huaertai Machinery Manufacture Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-04-26
Anticipated expiration: 2031-11-30

Abstract

The application provides a convenient independent multi-layer filtering device who changes belongs to sewage treatment technical field. This convenient multiple-layer filtering device who independently changes includes hypomere filtering component and middle section barrel and upper segment barrel, hypomere filtering component includes the hypomere barrel, thick cartridge filter is located inside the hypomere barrel, middle section filtering component includes the middle section barrel, thin cartridge filter and, thin cartridge filter is located the middle section barrel, upper segment filtering component includes the upper segment barrel, the filter pulp section of thick bamboo, the top cap can be dismantled with upper segment barrel upper end and be connected, the filter pulp section of thick bamboo is located the upper segment barrel, and the upper segment barrel is supported tightly in the opposite side of second baffle and top cap, the upper segment barrel is dismantled through the second fastener realization with the middle section barrel and is connected. In this application, hypomere filtering component can filter away large granule impurity in the sewage, and middle section filtering component filters away the small granule debris in the sewage, and tiny debris in upper segment filtering component will filter the sewage make the impurity in the sewage all filter away.

Description

Convenient independent multi-layer filtering device who changes

Technical Field

The application relates to the field of sewage treatment, in particular to a multi-layer filtering device convenient to replace independently.

Background

Sewage treatment, in order to make sewage reach the water quality requirement of discharging into a certain water body or reuse and carry out the process of purifying it, sewage treatment is widely used in each field such as building, agriculture, traffic, energy, petrochemical industry, environmental protection, urban landscape, medical treatment, food and beverage, also increasingly goes into common people's daily life.

Sewage at first need filter sewage in the processing procedure, and the filter equipment to sewage treatment that uses commonly at present all adopts single filter equipment, and the device uses after a period, and filter equipment is difficult for disassembling the washing and changing, and the filtration progression is on the low side simultaneously to the speed of sewage filtration and the quality of purification have been influenced.

SUMMERY OF THE UTILITY MODEL

In order to make up for above not enough, the application provides a convenient independent multilayer filter equipment who changes, aims at improving the problem that the filtration progression is low and filter equipment is difficult for disassembling the washing and changing.

The embodiment of the application provides a convenient independent multi-layer filtering device who changes, including hypomere filtering component and middle section filtering component and upper segment filtering component.

In the implementation process, the lower filtering assembly is used for filtering large-particle impurities in the sewage, the middle filtering assembly is used for filtering small-particle impurities in the sewage, and the upper filtering assembly is used for filtering fine impurities in the sewage to filter out all impurities in the sewage.

In a specific implementation scheme, the lower section filtering assembly comprises a lower section barrel, a first partition plate, a bottom cover and a coarse filtering barrel, the bottom cover is detachably connected to the bottom of the lower section barrel, the first partition plate is fixed on the inner side of the lower section barrel, the coarse filtering barrel is located inside the lower section barrel, the bottom end of the coarse filtering barrel is movably clamped with a groove in the bottom cover, the upper end of the coarse filtering barrel is movably contacted with the lower surface of the first partition plate, the first partition plate is provided with a first water outlet, and the first partition plate is located on the outer ring of the first water outlet and is further provided with a limiting groove.

In the implementation process, the outer ring of the bottom cover is provided with first threads, the bottom of the lower section of barrel is provided with second threads matched with the first threads, the bottom cover and the lower section of barrel are matched with each other through the first threads and the second threads to realize disassembly, the first partition plate is fixed on the inner wall of the lower section of barrel through welding, the bottom cover is rotated, the bottom cover can be screwed out from the lower section of barrel, and the coarse filter cartridge can be taken out from the lower section of barrel.

In a specific embodiment, the middle section filtering component comprises a middle section cylinder body, a fine filtering cylinder, an elastic piece and a first fastening piece, wherein the fine filtering cylinder is positioned in the middle section cylinder body, the bottom end of the fine filtering cylinder is movably clamped with a limiting groove, the top end of the fine filtering cylinder is movably abutted against one end of the elastic piece, and the middle section cylinder body is detachably connected with the lower section cylinder body through the first fastening piece.

In the above-mentioned realization in-process, the middle section barrel can be dismantled through first fastener with the hypomere barrel, and when the middle section barrel was unpacked apart with the hypomere barrel, the thin cartridge filter in the middle section barrel can be taken out and wash the change, and the elastic component is used for alleviateing the pressure to the thin cartridge filter when the inside sewage of hypomere barrel gets into the middle section barrel inside.

In a specific embodiment, the upper filtering component comprises an upper barrel, a second partition plate, a top cover, a second fastener and a filtering cotton barrel, the top cover is detachably connected with the upper end of the upper barrel, the second partition plate is fixedly connected with the lower end of the upper barrel, a second water outlet is formed in the second partition plate, the filtering cotton barrel is located in the upper barrel, the upper barrel is abutted against the opposite side of the second partition plate and the top cover, and the upper barrel and the middle barrel are detachably connected through the second fastener.

In the implementation process, the second partition plate is fixed on the inner wall of the upper section of the cylinder body in a welding manner, the middle section of the cylinder body can be disassembled from the upper section of the cylinder body through the second fastener, and the fine filter cylinder can be cleaned and replaced after the middle section of the cylinder body is disassembled from the upper section of the cylinder body.

In a specific embodiment, one side of the lower section of the cylinder body is communicated with a water inlet pipe, a water inlet valve is arranged on the water inlet pipe, and one side of the upper section of the cylinder body is communicated with a water outlet pipe.

In the implementation process, sewage enters the filter cylinder body through the water inlet pipe to be filtered and then flows out of the water outlet pipe.

In a specific embodiment, first fastener includes first otic placode and second otic placode and two first fixing bolt, first otic placode is provided with two, and two first otic placode symmetries are fixed in hypomere barrel top outside, first through-hole has been seted up respectively to two first otic placodes, the second otic placode is provided with two, two second otic placode symmetries are fixed in middle section barrel bottom both sides, two second otic placodes all seted up with first through-hole matched with second through-hole, two first fixing bolt run through first through-hole jointly and second through-hole can dismantle fixed connection with two first otic placodes and two second otic placodes respectively.

In the implementation process, the first lug plate and the second lug plate are fixed on two sides of the lower section cylinder and the middle section cylinder respectively through welding.

In a specific embodiment, the second fastener includes third otic placode and fourth otic placode and two second fixing bolt, the third otic placode is provided with two, and two third otic placode symmetries are fixed in the middle section barrel top outside, the third through-hole has been seted up respectively to two third otic placodes, the fourth otic placode is provided with two, two fourth otic placode symmetries are fixed in middle section barrel bottom both sides, two fourth otic placodes all seted up with the fourth through-hole matched with third through-hole, two second fixing bolt run through the third respectively jointly and run through the third through-hole and the fourth through-hole can dismantle fixed connection with two third otic placodes and two fourth otic placodes respectively.

In the implementation process, the third lug plate and the fourth lug plate are fixed on two sides of the middle section cylinder and two sides of the upper section cylinder respectively through welding.

In a specific embodiment, the number of the elastic positioning parts is two, each of the two elastic positioning parts comprises a positioning plate, a limiting rod and a limiting cover, the bottom end of the limiting rod is fixedly connected with the upper surface of the positioning plate, the top end of the limiting rod penetrates through the second partition plate, and the limiting cover is fixed at the top end of the limiting rod.

In the implementation process, the positioning plate and the limiting cover are fixed at two ends of the limiting rod through welding.

In a specific embodiment, the outer surface of the limiting rod is further sleeved with a spring, and the spring is located between the second partition plate and the positioning plate.

In a specific embodiment, the lower surface of the positioning plate is further provided with a positioning groove, and the inner ring of the positioning groove is further bonded with a rubber pad.

In the implementation process, the rubber pad can be made of rubber materials with good sealing performance.

In a specific embodiment, the inner wall of the lower section of the cylinder body is fixedly connected with a first limit ring plate, the inner wall of the upper section of the cylinder body is fixedly connected with a second limit ring plate, and rubber pads are adhered to the inner walls of the first limit ring plate and the second limit ring plate.

In the implementation process, the first limiting ring plate and the second limiting ring plate are fixed on the inner wall of the lower section cylinder and the inner wall of the upper section cylinder respectively in a welding manner, and the first limiting ring plate and the second limiting ring plate are used for limiting the coarse filter barrel and the filter cotton cylinder from being easily shaken by water impact respectively.

In a specific implementation scheme, one side of the middle section cylinder is communicated with a first backflushing water outlet pipe, one side of the lower section cylinder is communicated with a second backflushing water outlet pipe, and the bottom of the lower section cylinder is communicated with a third backflushing water outlet pipe.

In the implementation process, water enters the upper-section filtering cylinder from the water outlet pipe, the second backflushing water outlet pipe and the third backflushing water outlet pipe are closed at the moment, the first backflushing water outlet pipe is opened, impurities on the inner walls of the filtering cotton cylinder and the fine filtering cylinder can be washed clean, the washed wastewater is discharged through the first backflushing water outlet pipe, the second backflushing water outlet pipe and the third backflushing water outlet pipe are opened, the first backflushing water outlet pipe is closed, the impurities on the periphery of the coarse filtering net are washed clean by the water, and the sewage flows out from the second backflushing water outlet pipe and the third backflushing water outlet pipe.

In a specific embodiment, a hand wheel is fixedly connected to the upper surface of the top cover.

In the implementation process, the hand wheel is fixed on the upper surface of the top cover through welding, and the hand wheel is mounted to facilitate the screwing-off of the top cover.

Drawings

In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic diagram of a multi-layer filtration device that is easily and independently replaceable according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of a lower filter assembly according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural view of a mid-section filter assembly according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural view of an elastic member according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of an upper stage filter assembly according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of a first fastener construction provided in accordance with embodiments of the present application;

fig. 7 is a schematic structural view of a second fastener provided in an embodiment of the present application.

In the figure: 10-lower segment filtering component; 110-a lower section of barrel; 120-a first separator; 121-a first water outlet; 122-a limit groove; 130-a bottom cover; 140-coarse filter cartridge; 150-water inlet pipe; 160-a second backflushing water outlet pipe; 170-a first stop collar plate; 20-a middle section filtration module; 210-middle section cylinder; 220-a fine filter cartridge; 230-an elastic member; 231-a positioning plate; 232-a spring; 233-a limit rod; 234-a limit cap; 235-positioning grooves; 240-a first fastener; 241-a first ear plate; 242-a second ear plate; 243-first fixing bolt; 250-a first backflushing water outlet pipe; 30-an upper section filter assembly; 310-upper section of cylinder; 320-a second separator; 321-a second water outlet; 330-a top cover; 340-water outlet pipe; 350-a second fastener; 351-a third ear panel; 352-fourth ear plate; 353-a second fixing bolt; 360-a filter cartridge; 370-a second stop ring plate; 380-handwheel.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Referring to fig. 1, the present application provides a multi-layered filtering apparatus convenient for independent replacement, which includes a lower filtering assembly 10, a middle filtering assembly 20 and an upper filtering assembly 30.

Wherein, lower section filtering component 10 is arranged in filtering away the large granule impurity in the sewage, and middle section filtering component 20 is arranged in filtering away the tiny particle debris in the sewage, and upper segment filtering component 30 is arranged in filtering tiny debris in the sewage, makes the impurity in the sewage all filter away.

Referring to fig. 1 and 2, the lower filtering assembly 10 includes a lower barrel 110, a first partition plate 120, a bottom cover 130 and a coarse filtering barrel 140, the bottom cover 130 is detachably connected to the bottom of the lower barrel 110, the first partition plate 120 is fixed inside the lower barrel 110, the coarse filtering barrel 140 is located inside the lower barrel 110, the bottom end of the coarse filtering barrel 140 is movably clamped with a groove provided on the upper surface of the bottom cover 130, the upper end of the coarse filtering barrel 140 is movably contacted with the lower surface of the first partition plate 120, the first partition plate 120 is provided with a first water outlet 121, and a limiting groove 122 is further formed on the outer ring of the first partition plate 120 located at the first water outlet 121. The outer ring of the bottom cap 130 is provided with a first thread, the bottom of the lower barrel 110 is provided with a second thread matching with the first thread, the bottom cap 130 and the lower barrel 110 are matched with each other through the first thread and the second thread to realize disassembly, the first partition plate 120 is fixed on the inner wall of the lower barrel 110 by welding, the bottom cap 130 is screwed out from the lower barrel 110 by rotating the bottom cap 130, and the coarse filter cartridge 140 can be taken out from the lower barrel 110.

In the specific arrangement, one side of the lower section cylinder 110 is communicated with a water inlet pipe 150, the water inlet pipe 150 is provided with a water inlet valve, and one side of the upper section cylinder 310 is communicated with a water outlet pipe 340. Wherein, the sewage enters the filter cartridge body through the water inlet pipe 150 for filtration and then flows out from the water outlet pipe 340.

When the device is specifically arranged, the inner wall of the lower section cylinder body 110 is fixedly connected with a first limit ring plate 170, the inner wall of the upper section cylinder body 310 is fixedly connected with a second limit ring plate 370, and rubber pads are adhered to the inner walls of the first limit ring plate 170 and the second limit ring plate 370. The first limit ring plate 170 and the second limit ring plate 370 are fixed to the inner wall of the lower cylinder 110 and the inner wall of the upper cylinder 310 by welding, and the first limit ring plate 170 and the second limit ring plate 370 are used for limiting the coarse filter cylinder 140 and the filter cotton cylinder 360 from being shocked and shaken by water.

Referring to fig. 1, fig. 3, fig. 4 and fig. 6, the middle-section filtering assembly 20 includes a middle-section cylinder 210, a fine filtering cylinder 220, an elastic member 230 and a first fastening member 240, the fine filtering cylinder 220 is located in the middle-section cylinder 210, the bottom end of the fine filtering cylinder 220 is movably clamped with the limiting groove 122, the top end of the fine filtering cylinder 220 is movably abutted against one end of the elastic member 230, and the middle-section cylinder 210 is detachably connected with the lower-section cylinder 110 through the first fastening member 240. Wherein, the middle section barrel 210 and the lower section barrel 110 can be detached through the first fastening piece 240, when the middle section barrel 210 and the lower section barrel 110 are detached, the fine filter cartridge 220 in the middle section barrel 210 can be taken out for cleaning and replacement, and the elastic piece 230 is used for reducing the pressure on the fine filter cartridge 220 when the sewage in the lower section barrel 110 enters the middle section barrel 210.

When specifically setting up, first fastener 240 includes first otic placode 241 and second otic placode 242 and two first fixing bolt 243, first otic placode 241 is provided with two, and two first otic placode 241 symmetries are fixed in the lower section barrel 110 top outside, first through-hole has been seted up respectively to two first otic placodes 241, second otic placode 242 is provided with two, two second otic placode 242 symmetries are fixed in middle section barrel 210 bottom both sides, two second otic placodes 242 have all been seted up and have been run through the mouth with first through-hole matched with second, two first fixing bolt 243 run through first through-hole jointly and second run through the mouth respectively with two first otic placodes 241 and two second otic placodes 242 can dismantle fixed connection. The first ear plate 241 and the second ear plate 242 are fixed to both sides of the lower cylinder 110 and the middle cylinder 210 by welding.

When the arrangement is specific, two elastic members 230 are provided, each of the two elastic members 230 includes a positioning plate 231, a limiting rod 233 and a limiting cover 234, the bottom end of the limiting rod 233 is fixedly connected with the upper surface of the positioning plate 231, the top end of the limiting rod 233 penetrates through the second partition 320, and the limiting cover 234 is fixed at the top end of the limiting rod 233. The positioning plate 231 and the limiting cover 234 are fixed at two ends of the limiting rod 233 by welding.

When the positioning device is specifically arranged, the spring 232 is further sleeved on the outer surface of the limiting rod 233, and the spring 232 is located between the second partition plate 320 and the positioning plate 231.

When the positioning plate is specifically arranged, the positioning groove 235 is further formed in the lower surface of the positioning plate 231, and a rubber pad is further bonded to the inner ring of the positioning groove 235. Wherein, the rubber pad can adopt the rubber material that sealing performance is good.

When the device is specifically arranged, one side of the middle section cylinder 210 is communicated with a first backflushing water outlet pipe 250, one side of the lower section cylinder 110 is communicated with a second backflushing water outlet pipe 160, and the bottom of the lower section cylinder 110 is also communicated with a third backflushing water outlet pipe. The water enters the upper-section filtering cylinder from the water outlet pipe 340, the second backflushing water outlet pipe 160 and the third backflushing water outlet pipe are closed at the moment, the first backflushing water outlet pipe 250 is opened, impurities on the inner walls of the filtering cotton cylinder 360 and the fine filtering cylinder 220 can be washed clean, the washed wastewater is discharged through the first backflushing water outlet pipe 250, the second backflushing water outlet pipe 160 and the third backflushing water outlet pipe are opened, the first backflushing water outlet pipe 250 is closed, the impurities on the periphery of the coarse filtering cylinder 140 are washed clean by the water, and the sewage flows out from the second backflushing water outlet pipe 160 and the third backflushing water outlet pipe.

Referring to fig. 1, 5 and 7, the upper filtering assembly 30 includes an upper cylinder 310, a second partition 320, a top cap 330, a second fastening member 350 and a filtering cotton cylinder 360, the top cap 330 is detachably connected to the upper end of the upper cylinder 310, the second partition 320 is fixedly connected to the lower end of the upper cylinder 310, the second partition 320 is provided with a second water outlet 321, the filtering cotton cylinder 360 is located in the upper cylinder 310, the upper cylinder 310 is tightly pressed against the opposite sides of the second partition 320 and the top cap 330, and the upper cylinder 310 is detachably connected to the middle cylinder 210 through the second fastening member 350. The second partition plate 320 is fixed to the inner wall of the upper cylinder 310 by welding, the middle cylinder 210 and the upper cylinder 310 can be disassembled by the second fastener 350, and the fine filter screen can be cleaned and replaced after the middle cylinder 210 and the upper cylinder 310 are disassembled.

When specifically setting up, second fastener 350 includes third otic placode 351 and fourth otic placode 352 and two second fixing bolt 353, third otic placode 351 is provided with two, and two third otic placode 351 symmetries are fixed in the middle section barrel 210 top outside, the third through-hole has been seted up respectively to two third otic placodes 351, fourth otic placode 352 is provided with two, two fourth otic placode 352 symmetries are fixed in upper segment barrel 310 bottom both sides, two fourth otic placodes 352 have all been seted up and have been run through a mouthful matched with third through-hole with the fourth, two second fixing bolt 353 run through the third respectively jointly and run through mouthful and the fourth through-hole can dismantle fixed connection with two third otic placodes 351 and two fourth otic placodes 352 respectively. The third lug plate 351 and the fourth lug plate 352 are respectively fixed on two sides of the middle cylinder 210 and the upper cylinder 310 by welding.

In a specific setting, a hand wheel 380 is fixedly connected to the upper surface of the top cover 330. The hand wheel 380 is fixed on the upper surface of the top cover 330 by welding, and the hand wheel 380 is mounted to facilitate the screwing-off of the top cover 330.

This convenient multilayer filter equipment who independently changes's theory of operation: when the filter net needs to be cleaned and replaced, the bottom cover 130 is rotated to rotate the bottom cover 130 out of the lower cylinder 110, then the coarse filter cylinder 140 is taken out of the lower cylinder 110, the two first fixing bolts 243 are respectively rotated, at this time, the two first ear plates 241 and the two second ear plates 242 are separated, so that the middle cylinder 210 is disassembled from the lower cylinder 110, when the middle cylinder 210 is disassembled from the lower cylinder 110, the fine filter cylinder 220 in the middle cylinder 210 can be taken out for cleaning and replacement, the two second fixing bolts 353 are respectively rotated, at this time, the two third ear plates 351 and the two fourth ear plates 352 are separated, so that the middle cylinder 210 is disassembled from the lower cylinder 110, when the middle cylinder 210 is disassembled from the lower cylinder 110, the fine filter cylinder 220 in the middle cylinder 210 can be taken out for cleaning and replacement, the top cover 330 is rotated by grasping the hand wheel 380 on the top cover 330, so that the top cover 330 can be rotated out of the upper cylinder 310, at this time, the filter cotton tube 360 can be taken out from the upper cylinder 310 for cleaning and replacement.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A multi-layer filtering device convenient for independent replacement is characterized by comprising

The lower section filtering assembly (10) comprises a lower section cylinder (110), a first partition plate (120), a bottom cover (130) and a coarse filtering cylinder (140), the bottom cover (130) is detachably connected to the bottom of the lower section cylinder (110), the first partition plate (120) is fixed on the inner side of the lower section cylinder (110), the coarse filtering cylinder (140) is located inside the lower section cylinder (110), the bottom end of the coarse filtering cylinder (140) is movably clamped with a groove on the upper surface of the bottom cover (130), the upper end of the coarse filtering cylinder (140) is movably contacted with the lower surface of the first partition plate (120), the first partition plate (120) is provided with a first water outlet (121), and the outer ring of the first partition plate (120) on the first water outlet (121) is also provided with a limiting groove (122);

the middle-section filtering assembly (20) comprises a middle-section barrel (210), a fine filtering barrel (220), an elastic piece (230) and a first fastening piece (240), wherein the fine filtering barrel (220) is positioned in the middle-section barrel (210), the bottom end of the fine filtering barrel (220) is movably clamped with the limiting groove (122), the top end of the fine filtering barrel (220) is movably and tightly abutted against one end of the elastic piece (230), and the middle-section barrel (210) is detachably connected with the lower-section barrel (110) through the first fastening piece (240);

upper segment filtering component (30), upper segment filtering component (30) include upper segment barrel (310), second baffle (320), top cap (330) and second fastener (350) and filter cotton section of thick bamboo (360), top cap (330) with upper segment barrel (310) upper end can be dismantled and be connected, second baffle (320) with upper segment barrel (310) lower extreme fixed connection, second delivery port (321) have been seted up to second baffle (320), filter cotton section of thick bamboo (360) are located in upper segment barrel (310), just upper segment barrel (310) by support tightly in second baffle (320) with the opposite side of top cap (330), upper segment barrel (310) with middle segment barrel (210) pass through second fastener (350) realize dismantling the connection.

2. The multi-layer filtering device convenient for independent replacement as claimed in claim 1, wherein one side of the lower section cylinder (110) is communicated with a water inlet pipe (150), the water inlet pipe (150) is provided with a water inlet valve, and one side of the upper section cylinder (310) is communicated with a water outlet pipe (340).

3. A conveniently self-contained multi-layer filtration device as claimed in claim 1, the first fastening member (240) includes first and second ear plates (241, 242) and two first fixing bolts (243), the first ear plate (241) is provided with two, the two first ear plates (241) are symmetrically fixed at the outer side of the top of the lower cylinder (110), the two first ear plates (241) are respectively provided with a first through opening, second otic placode (242) are provided with two, two second otic placode (242) symmetry is fixed in middle section barrel (210) bottom both sides, two second otic placode (242) all seted up with first through-hole matched with second run through mouthful, two first fixing bolt (243) run through first through-hole jointly and second run through mouthful respectively with two first otic placode (241) and two fixed connection can be dismantled to second otic placode (242).

4. A conveniently self-contained multi-layer filtration device as claimed in claim 1, the second fastening member (350) includes third and fourth lug plates (351, 352) and two second fixing bolts (353), the third lug plate (351) being provided with two, the two third ear plates (351) are symmetrically fixed at the outer side of the top of the middle section cylinder body (210), the two third ear plates (351) are respectively provided with a third through opening, fourth otic placode (352) are provided with two, two fourth otic placode (352) symmetry is fixed in upper segment barrel (310) bottom both sides, two fourth otic placode (352) all seted up and run through mouthful matched with third with the fourth and run through mouthful, two second fixing bolt (353) run through the third respectively jointly and run through mouthful and the fourth run through mouthful respectively with two third otic placode (351) and two fixed connection can be dismantled to fourth otic placode (352).

5. The multi-layer filtering device convenient for independent replacement according to claim 1, wherein two elastic members (230) are provided, each of the two elastic members (230) comprises a positioning plate (231), a limiting rod (233) and a limiting cover (234), the bottom end of the limiting rod (233) is fixedly connected with the upper surface of the positioning plate (231), the top end of the limiting rod (233) penetrates through the second partition plate (320), and the limiting cover (234) is fixed at the top end of the limiting rod (233).

6. The multi-layered filtering apparatus convenient for independent replacement as claimed in claim 5, wherein the limiting rod (233) is further sleeved with a spring (232), and the spring (232) is located between the second partition plate (320) and the positioning plate (231).

7. The multi-layer filtering device convenient for independent replacement as claimed in claim 6, wherein the positioning plate (231) further has a positioning groove (235) formed on the lower surface thereof, and a rubber pad is further bonded to the inner ring of the positioning groove (235).

8. The multi-layer filtering device convenient for independent replacement as claimed in claim 1, wherein a first limit ring plate (170) is fixedly connected to the inner wall of the lower section cylinder (110), a second limit ring plate (370) is fixedly connected to the inner wall of the upper section cylinder (310), and rubber pads are bonded to the inner walls of the first limit ring plate (170) and the second limit ring plate (370).

9. The multi-layer filtering device convenient for independent replacement as claimed in claim 1, wherein one side of the middle section cylinder (210) is communicated with a first back flushing water outlet pipe (250), one side of the lower section cylinder (110) is communicated with a second back flushing water outlet pipe (160), and the bottom of the lower section cylinder (110) is also communicated with a third back flushing water outlet pipe.

10. The multi-layered filtering apparatus convenient for independent replacement as claimed in claim 1, wherein a handwheel (380) is fixedly connected to the upper surface of the top cover (330).