CN217015607U - Multiple filter equipment is used in sewage treatment - Google Patents

Abstract

The utility model discloses a multiple filtering device for sewage treatment, which comprises a treatment box body, wherein the treatment box body is of a box body structure with an open top, side seats are fixed on the inner walls of two sides of the treatment box body, matching grooves are vertically formed in the end surfaces, close to each other, of the side seats, a plurality of mounting holes are transversely formed in two sides of the treatment box body, and the mounting holes in the positions of the two sides are transversely contrasted. Has the advantages that: according to the utility model, the plurality of filter assemblies are detachably fixed in the treatment box body in a stacked manner respectively in a mode of vertical sliding fit of the matching seat and the matching groove and in a mode of transverse sliding fit of the limiting rod and the limiting hole, and meanwhile, the diameters of the filter screen filtering holes of the plurality of filter assemblies are sequentially reduced from top to bottom, so that sewage can be filtered in multiple ways when passing through the plurality of filter screens from top to bottom, and then a plurality of solids with different particle size specifications can be filtered respectively, thereby being beneficial to improving the solid-liquid separation effect of sewage treatment.

Description

Multiple filter equipment is used in sewage treatment

Technical Field

The utility model relates to the field of auxiliary equipment for sewage treatment, in particular to a multiple filtering device for sewage treatment.

Background

Contaminants in wastewater generally exist in three forms: the physical treatment of sewage mainly comprises suspended matters and partial colloids which can block a water pump impeller and a pipeline valve and increase the load of a subsequent treatment unit, so the physical treatment of sewage is also called solid-liquid separation treatment of wastewater. The filter equipment needs to be used in the process, but the solid granularity specification of the filter screen of the filter equipment at present is fixed when the filter equipment is designed, so that solid impurities with the solid granularity smaller than the filter holes can pass through the filter screen, and the effect of solid-liquid separation is general.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provide a multiple filtering device for sewage treatment, wherein a plurality of filtering components are detachably fixed in a treatment box body in a stacked mode respectively in a mode of vertical sliding fit of a matching seat and a matching groove and transverse sliding fit of a limiting rod and a limiting hole, and the diameters of filtering holes of the filtering components are sequentially reduced from top to bottom, so that sewage can be filtered multiple times when passing through a plurality of filtering screens from top to bottom, and a plurality of solids with different particle size specifications can be filtered respectively, as will be explained in detail below.

In order to realize the purpose, the utility model provides the following technical scheme:

the utility model provides a multiple filtering device for sewage treatment, which comprises a treatment box body, wherein the treatment box body is of a box body structure with an open top, side seats are fixed on the inner walls of two sides of the treatment box body, matching grooves are vertically formed in the end surfaces, close to each other, of the side seats, a plurality of mounting holes are formed in the two sides of the treatment box body in the transverse direction, the mounting holes in the two side positions are respectively in transverse contrast, locking assemblies are coaxially arranged in the mounting holes, the locking assemblies are respectively fixed on the outer sides of the corresponding treatment box body, a plurality of matching holes are formed in the end surfaces, far away from each other, of the side seats in the transverse direction, and the matching holes are in one-to-one coaxial contrast with the mounting holes and are in transverse sliding fit with the corresponding locking assemblies;

the equal vertical sliding fit in cooperation groove has with the unilateral the filter component that locking Assembly quantity corresponds, filter component's filtration pore specification top-down reduces in proper order, just filter component's both sides respectively with correspond locking Assembly lateral sliding fit.

Preferably, a drain pipe is fixedly communicated with one side of the bottom of the treatment box body, and a valve for controlling opening and closing is installed on the periphery of the drain pipe.

As preferred, the filtering component is including protecting frame and cooperation seat, it is upper and lower open frame structure to protect the frame, the equal level in bottom of protecting the frame seals and is fixed with the filter screen, and a plurality of the filtering component the filtration pore top-down of filter screen reduces in proper order, the equal vertical cooperation seat that is fixed with in both sides of protecting the frame, just the cooperation seat with the cooperation groove corresponds respectively and vertical sliding fit, spacing hole has all been seted up along transversely in the outside of cooperation seat, spacing hole is close with the homonymy respectively locking component transverse sliding fit.

Preferably, a nameplate for indicating the aperture size of the filtering holes of the filtering net is fixed on the front surface of the protective frame.

Preferably, the matching groove is one of a rectangular groove, a dovetail groove or an I-shaped groove.

Preferably, the locking assembly comprises a sheath and a limiting rod, the sheath is fixed on the outer side of the treatment box body along the transverse direction and is coaxially matched with the corresponding mounting holes, mounting grooves are transversely formed in the end parts, close to each other, of the sheaths at the two side positions, the mounting grooves are coaxial with the corresponding mounting holes, the limiting rod is coaxially arranged in each mounting groove, the two ends of the limiting rod respectively extend out of the sheath and the mounting holes in a sliding fit manner, the end parts, close to each other, of the limiting rods at the two side positions are respectively in transverse sliding fit with the corresponding limiting holes, the outer sides of the parts, located in the mounting grooves, of the limiting rods are coaxially in clearance fit with pressure springs, the end parts, far away from each other, of the pressure springs at the two side positions are fixed on the corresponding mounting grooves, and the end parts, close to each other, of the pressure springs at the two side positions are fixed with lantern rings, and the lantern ring is coaxially fixed at the outer side of the corresponding limiting rod.

Preferably, the lantern ring is in transverse sliding fit with the corresponding mounting groove, and handles are fixed at the end parts, far away from each other, of the limiting rods at the two sides.

Preferably, the protection frames are stacked from top to bottom and are in contact with each other in a fitting mode, the fitting grooves are blind grooves in the vertical direction, and the bottom ends of the fitting seats at the lowest positions are in contact with the bottoms of the corresponding fitting grooves.

By adopting the above multiple filtering device for sewage treatment, initially, the matching seat is in vertical sliding fit with the matching groove, the limiting rod is in transverse sliding fit with the limiting hole, the matching seat can be locked by the matching of the limiting rod and the limiting hole, the matching groove can not be vertically separated, so that the filtering components are detachably fixed in the treatment box body, the filtering components are locked in a vertically stacked state, when in use, sewage is poured into the protection frame at the highest position from the top of the treatment box body, solid-liquid separation is carried out after the sewage is filtered by the filtering net at the highest position, the sewage falls to the filtering net at the lower position, the filtering net at the lower position continuously falls to the filtering net at the lower position after the sewage is filtered by the filtering net at the lower position again, and the diameters of the filtering net filtering holes of the filtering components are sequentially reduced from top to bottom, then sewage can be filtered in multiple ways when passing through the plurality of filter screens from top to bottom, then a plurality of solids with different particle size specifications can be filtered out respectively, the solid-liquid separation effect of sewage treatment is favorably improved, finally the sewage can fall into the bottom of the treatment box body and can be discharged to the outside through the drain pipe, when the filter assembly needs to be cleaned, the handles at two sides of the highest position are pulled outwards to enable the end part of the limiting rod to be retracted into the corresponding mounting hole, in the process, the lantern ring compresses the pressure spring, when the end part of the limiting rod is pulled out of the matching groove, the limitation that the matching seat cannot slide and be separated along the matching groove in the vertical direction can be removed, then the protection frame at the highest position can be vertically pulled out by keeping the outward pulling of the limiting rod to enable the matching seat to be separated from the matching groove in the vertical direction, and the filter assembly at the highest position can be separated from the top of the treatment box body immediately, then according to the above operation mode, the plurality of filtering components are sequentially taken from the top of the processing box body from top to bottom, when the filtering components are taken away, a plurality of groups of limiting rods are sequentially pulled from bottom to top in the process of sliding on the filtering components in a layered manner so as to ensure that the filtering components can be smoothly taken away from the top of the processing box body, then the filtering screens of the plurality of filtering components can be thoroughly cleaned, so that the filtering screens have high and stable working efficiency, when the plurality of filtering components are required to be installed again, the filtering component with the smallest filtering hole diameter, namely the filtering component which is positioned at the lowest position, is lifted to the upper part of the processing box body, the matching seats at the two sides of the protecting frame are vertically matched with the matching grooves of the side seats respectively, and then the protecting frame with the smallest filtering hole diameter of the filtering screen is placed downwards so that the matching seats descend and slide into the corresponding matching grooves, the handles on two sides are held and pulled outwards again to enable the inner ends of the limiting rods to be retracted into the corresponding mounting holes so as to avoid interference with smooth sliding of the matching seats, when the matching seats slide to the bottom ends and contact with the bottom ends of the corresponding matching grooves again, the handles are loosened, the compression springs immediately release the compression states to drive the limiting rods to be transversely inserted into the corresponding limiting holes again, the filtering assemblies with the smallest diameters of the filtering holes of the filtering net are completed, namely the filtering assemblies originally at the lowest positions are installed in place, then the filtering assemblies are sequentially installed in a mode that the diameters of the filtering holes of the filtering net are sequentially increased from bottom to top according to the operation mode, and when the filtering assemblies are installed again, a plurality of groups of limiting rods are sequentially pulled in a layering mode from top to bottom in the process of sliding down of the filtering assemblies, in order to ensure gliding that filter assembly can be smooth and easy passes through inside the processing box, so just accomplished filter assembly's the clearance of tearing open and reinstallating, filter assembly's simple easy operation of dismouting mode is then convenient for right filter assembly the filter screen thoroughly clears up respectively, is favorable to guaranteeing a plurality ofly filter assembly all has high-efficient stable work efficiency.

Has the advantages that: 1. according to the utility model, the plurality of filter assemblies are detachably fixed in the treatment box body in a laminated manner respectively in a manner of vertical sliding fit of the matching seat and the matching groove and transverse sliding fit of the limiting rod and the limiting hole, and meanwhile, the diameters of filter screen holes of the plurality of filter assemblies are sequentially reduced from top to bottom, so that sewage can be filtered in multiple ways when passing through the plurality of filter screens from top to bottom, and then a plurality of solids with different particle size specifications can be respectively filtered out, thereby being beneficial to improving the solid-liquid separation effect of sewage treatment;

2. after only needing outer pull limiting rod to deviate from spacing hole alright take out a plurality of filtering component top-down in proper order through the mode that cooperation seat vertically slided along cooperation groove and handle the box, the simple easy operation of dismouting mode is convenient for then thoroughly clear up filtering component's filter screen respectively, is favorable to ensureing that a plurality of filtering component all have high-efficient stable work efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front internal view of the present invention;

FIG. 2 is a front cross-sectional view of the utility model of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1 in accordance with the present invention;

FIG. 4 is a top exterior view of FIG. 1 of the present invention;

fig. 5 is a top cross-sectional view of fig. 1 of the present invention.

The reference numerals are illustrated below:

1. a treatment box body; 101. a valve; 102. a drain pipe; 103. mounting holes; 2. a side seat; 201. a mating groove; 202. a mating hole; 3. a filter assembly; 301. protecting the frame; 302. a nameplate; 303. a mating seat; 304. filtering with a screen; 305. a limiting hole; 4. a locking assembly; 401. a sheath; 402. a limiting rod; 403. a handle; 404. a pressure spring; 405. mounting grooves; 406. and (4) a lantern ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Referring to fig. 1 to 5, the utility model provides a multiple filtration device for sewage treatment, which comprises a treatment box body 1, wherein the treatment box body 1 is of a box body structure with an open top, side seats 2 are fixed on the inner walls of two sides of the treatment box body 1, matching grooves 201 are vertically formed in the end surfaces, close to each other, of the side seats 2, a plurality of mounting holes 103 are transversely formed in two sides of the treatment box body 1, the mounting holes 103 in the two sides are transversely opposite to each other, locking assemblies 4 are coaxially arranged on the mounting holes 103, the locking assemblies 4 are respectively fixed on the outer sides of the corresponding treatment box body 1, a plurality of matching holes 202 are transversely formed in the end surfaces, far away from each other, of the side seats 2, and the matching holes 202 and the mounting holes 103 are coaxially opposite to each other and are in transverse sliding fit with the corresponding locking assemblies 4. The equal vertical sliding fit of cooperation groove 201 has the filter component 3 that corresponds with the locking component 4 quantity of unilateral, and the filtration pore specification top-down of filter component 3 reduces in proper order, and the both sides of filter component 3 respectively with the locking component 4 lateral sliding fit who corresponds, and the quantity of preferred filter component 3 is three.

As the preferred scheme of the scheme, one side of the bottom of the processing box body 1 is fixedly communicated with the drain pipe 102, the periphery of the drain pipe 102 is provided with the valve 101 for controlling the opening and closing of the drain pipe 102, the opening and closing of the drain pipe 102 can be controlled conveniently and rapidly through the valve 101, then, the sewage at the bottom of the processing box body 1 can be discharged to the outside through the drain pipe 102 conveniently, the filtering component 3 comprises a protective frame 301 and a matching seat 303, the protective frame 301 is of a frame structure which is opened up and down, the bottom of the protective frame 301 is horizontally sealed and fixed with a filtering net 304, filtering holes of the filtering nets 304 of the filtering components 3 are sequentially reduced from top to bottom, the matching seats 303 are vertically fixed on two sides of the protective frame 301, the matching seats 303 and the matching grooves 201 are respectively corresponding and in vertical sliding fit, the outer sides of the matching seats 303 are respectively provided with limiting holes 305 along the transverse direction, the limiting holes 305 are respectively in sliding fit with the locking components 4 which are close to the same side, so set up, be convenient for through the mode of sewage through filter screen 304 by filter screen 304 solid-liquid separation.

Protecting frame 301's preceding all to be fixed with the data plate 302 that is used for showing the filtration pore aperture specification of filter screen 304, so setting up, being convenient for can directly obtain the filtration pore aperture specification that corresponds the filtration pore through the mode of observing data plate 302, cooperation groove 201 is one kind of rectangular channel, dovetail groove or I-shaped groove, so setting up, has good direction design when being convenient for cooperate seat 303 along the vertical slip of cooperation groove 201.

The locking component 4 comprises a sheath 401 and a limiting rod 402, the sheath 401 is respectively fixed on the outer side of the processing box body 1 along the transverse direction and is coaxially opposite to the corresponding mounting hole 103, the end parts of the sheath 401 at two side positions close to each other are respectively provided with a mounting groove 405 along the transverse direction, the mounting groove 405 is coaxial with the corresponding mounting hole 103, the limiting rod 402 is coaxially arranged in each mounting groove 405, the two ends of the limiting rod 402 respectively extend out of the sheath 401 and the mounting hole 103 in a sliding fit manner, the end parts of the limiting rods 402 at two side positions close to each other are respectively in transverse sliding fit with the corresponding limiting holes 305, the outer sides of the parts of the limiting rods 402 in the mounting grooves 405 are coaxially in clearance fit with a pressure spring 404, the end parts of the pressure springs 404 at two side positions far away from each other are respectively fixed on the corresponding mounting grooves 405, the end parts of the pressure springs 404 at two side positions close to each other are respectively fixed with a lantern ring 406, and the lantern rings 406 are coaxially fixed on the outer sides of the corresponding limiting rods 402, so set up, be convenient for come the unable vertical cooperation groove 201 that deviates from of locking cooperation seat 303 through gag lever post 402 and spacing hole 305 complex mode, be convenient for simultaneously remove the unable vertical locking that deviates from cooperation groove 201 of cooperation seat 303 through the mode that gag lever post 402 deviates from spacing hole 305.

The collar 406 is in sliding fit with the corresponding mounting groove 405 in the transverse direction, so as to guide the transverse pulling of the stop rod 402 by means of the collar 406 sliding along the mounting groove 405 in the transverse direction, the end parts of the stop rods 402 at two sides away from each other are fixed with handles 403, with the arrangement, the limiting rod 402 can be pulled by holding the handle 403, the plurality of protective frames 301 are stacked from top to bottom and are attached and contacted, so as to obviously prompt that each limit hole 305 is horizontally contrasted with the adjacent limit rod 402 respectively through the way that a plurality of protective frames 301 are laminated and stacked up and down, the matching groove 201 is a blind groove in the vertical direction, and the bottom end of the fitting seat 303 at the lowest position contacts with the bottom of the corresponding fitting groove 201, so that when the limiting rod 402 at the lowest position is transversely aligned with the limiting hole 305 of the filter assembly 3, the bottom end of the matching seat 303 at the lowest position is obviously prompted to contact with the bottom of the corresponding matching groove 201.

By adopting the structure, initially, the matching seat 303 is in vertical sliding fit with the matching groove 201, and the limiting rod 402 is in horizontal sliding fit with the limiting hole 305, so that the matching seat 303 can be locked and cannot vertically fall out of the matching groove 201 through the matching of the limiting rod 402 and the limiting hole 305, the filtering components 3 are detachably fixed in the processing box body 1, and the plurality of filtering components 3 are locked in a vertically stacked state, when in use, sewage is poured into the protective frame 301 at the highest position from the top of the processing box body 1, the sewage is filtered by the filtering net 304 at the highest position, then the sewage is subjected to solid-liquid separation and falls to the filtering net 304 at the lower position, and the filtering net 304 at the lower position filters the sewage again, so that the sewage continues to fall to the filtering net 304 at the lower position, and the diameters of the filtering holes 304 of the plurality of filtering components 3 are reduced from top to bottom in sequence, so that the sewage can be subjected to multiple filtering when passing through the plurality of filtering nets 304 from top to bottom, then a plurality of solids with different particle size specifications can be respectively filtered out, which is beneficial to improving the solid-liquid separation effect of sewage treatment, finally, sewage can fall into the bottom of the treatment box body 1 and can be discharged to the outside through the drain pipe 102, when the filtering component 3 needs to be cleaned, the handles 403 at the two sides of the highest position are pulled outwards at the same time, so that the end part of the limiting rod 402 is all received in the corresponding mounting hole 103, in the process, the lantern ring 406 compresses the pressure spring 404, the limit that the matching seat 303 can not slide and separate from the matching groove 201 vertically can be removed after the end part of the limiting rod 402 is pulled out of the matching groove 201, then the protective frame 301 at the highest position can be vertically lifted by keeping the pulling-out of the limiting rod 402, so that the matching seat 303 is vertically separated from the matching groove 201, the filtering component 3 at the highest position is immediately taken out of the top of the treatment box body 1, and then the plurality of filtering components 3 are sequentially taken out of the top of the treatment box body 1 from top according to top down according to the operation mode, when the filter assembly 3 is taken away, a plurality of groups of limiting rods 402 are sequentially pulled from bottom to top in the process of sliding on the filter assembly 3 in a layered manner from top to bottom in order to ensure that the filter assembly 3 can be smoothly taken away from the top of the treatment box body 1, then the filter screens 304 of a plurality of filter assemblies 3 can be thoroughly cleaned, so that the filter screens 304 have high-efficiency and stable working efficiency, when a plurality of filter assemblies 3 need to be installed again, the filter assembly 3 with the smallest filter hole diameter of the filter screen 304, namely the filter assembly 3 which needs to be positioned at the lowest position, is lifted to the upper side of the treatment box body 1, the matching seats 303 at two sides of the protective frame 301 are vertically compared with the matching grooves 201 of the side seats 2 respectively, then the protective frame 301 with the smallest filter hole diameter of the filter screen 304 is put down to slide into the corresponding matching grooves 201, the handles 403 at two sides are held by hands again to pull the inner ends of the limiting rods 402 into the corresponding mounting holes 103, so as to avoid interfering the smooth sliding down of the matching seat 303, when the matching seat 303 slides to the bottom and contacts with the bottom of the corresponding matching groove 201 again, the handle 403 is loosened, the compression spring 404 releases the compression state immediately to drive the limiting rod 402 to be inserted into the corresponding limiting hole 305 transversely again, so as to complete the filtering component 3 with the smallest diameter of the filtering hole of the filtering net 304, namely the filtering component 3 which is originally at the lowest position is installed in place, then the plurality of filtering components 3 are sequentially installed according to the mode that the diameters of the filtering holes of the filtering net 304 are sequentially increased from bottom to top according to the operation mode, when the filtering component 3 is installed again, a plurality of groups of limiting rods 402 are sequentially pulled from top to bottom in a layering way in the process that the filtering component 3 slides down, so as to ensure that the filtering component 3 can smoothly slide down into the processing box body 1, thus completing the dismounting cleaning and remounting of the filtering component 3, and the dismounting mode of the filtering component 3 is simple and easy to operate, then be convenient for thoroughly clear up filter screen 304 to filter component 3 respectively, be favorable to guaranteeing that a plurality of filter component 3 all have high-efficient stable work efficiency.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention 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 invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (8)

1. The utility model provides a multiple filtration device for sewage treatment, is including handling box (1), its characterized in that: the processing box body (1) is of a box body structure with an open top, side seats (2) are fixed on inner walls of two sides of the processing box body (1), matching grooves (201) are vertically formed in end faces, close to each other, of the side seats (2), a plurality of mounting holes (103) are transversely formed in two sides of the processing box body (1), the mounting holes (103) in two side positions are transversely matched with each other respectively, locking assemblies (4) are coaxially arranged in the mounting holes (103), the locking assemblies (4) are fixed on outer sides of the corresponding processing box body (1) respectively, a plurality of matching holes (202) are transversely formed in end faces, far away from each other, of the side seats (2), and the matching holes (202) are coaxially matched with the mounting holes (103) one by one and are in transverse sliding fit with the corresponding locking assemblies (4);

the filter assembly is characterized in that the matching grooves (201) are vertically matched with the filter assemblies (3) corresponding to the locking assemblies (4) in number in a sliding mode, the filter holes of the filter assemblies (3) are sequentially reduced from top to bottom, and the two sides of the filter assemblies (3) are respectively matched with the corresponding locking assemblies (4) in a sliding mode.

2. The multiple filtration device for sewage treatment as claimed in claim 1, wherein: a drain pipe (102) is fixedly communicated with one side of the bottom of the processing box body (1), and a valve (101) for controlling opening and closing is installed on the periphery of the drain pipe (102).

3. The multiple filtration device for sewage treatment according to claim 2, wherein: filter component (3) are including protecting frame (301) and cooperation seat (303), protect frame (301) and be open frame structure from top to bottom, the equal level in bottom of protecting frame (301) is sealed and is fixed with filter screen (304), and is a plurality of filter component (3) the filtration pore top-down of filter screen (304) reduces in proper order, the equal vertical cooperation seat (303) that is fixed with in both sides of protecting frame (301), just cooperation seat (303) with cooperation groove (201) correspond respectively and vertical sliding fit, spacing hole (305) have all been seted up along transversely in the outside of cooperation seat (303), spacing hole (305) are close with the homonymy respectively locking component (4) lateral sliding fit.

4. The multiple filtration device for sewage treatment as recited in claim 3, wherein: and nameplates (302) for indicating the aperture specification of the filter holes of the filter screen (304) are fixed on the front surfaces of the protective frames (301).

5. The multiple filtration device for sewage treatment as claimed in claim 4, wherein: the matching groove (201) is a rectangular groove, a dovetail-shaped groove or an I-shaped groove.

6. The multiple filtration device for sewage treatment as recited in any one of claims 3 to 5, wherein: the locking assembly (4) comprises a sheath (401) and a limiting rod (402), the sheath (401) is transversely fixed on the outer side of the treatment box body (1) and is coaxially compared with the corresponding mounting hole (103), mounting grooves (405) are transversely formed in the end portions, close to each other, of the sheath (401) at the positions of two sides, the mounting grooves (405) are coaxial with the corresponding mounting holes (103), the limiting rod (402) is coaxially arranged in each mounting groove (405), the two ends of the limiting rod (402) respectively extend out of the sheath (401) and the mounting holes (103) in a sliding fit mode, the end portions, close to each other, of the limiting rods (402) at the positions of two sides are transversely sliding fit with the corresponding limiting holes (305), and a pressure spring (404) is coaxially in clearance fit with the outer side of the portion, located in the mounting groove (405), of the limiting rod (402), the end parts, far away from each other, of the pressure springs (404) at the two sides are fixed on the corresponding mounting grooves (405), the end parts, close to each other, of the pressure springs (404) at the two sides are fixed with lantern rings (406), and the lantern rings (406) are coaxially fixed on the outer sides of the corresponding limiting rods (402).

7. The multiple filtration device for sewage treatment as claimed in claim 6, wherein: the lantern ring (406) is in transverse sliding fit with the corresponding mounting groove (405), and handles (403) are fixed at the end parts, far away from each other, of the limiting rods (402) at the two sides.

8. The multiple filtration device for sewage treatment as recited in claim 7, wherein: it is a plurality of protect frame (301) top-down stacks the setting and the laminating contact, cooperate groove (201) vertically to be blind groove, and the lowest position cooperate seat (303) bottom with correspond cooperation groove (201) tank bottom contact.

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