A kind of unpowered rural sewage treatment distributed ecological filter system

Abstract

The application relates to the technical field of sewage treatment, and discloses a distributed ecological filter tank system for non-powered rural sewage treatment, which comprises a pretreatment tank and purification tanks, the purification tanks are arranged on the side of the pretreatment tank in a sinking mode, a plurality of purification tanks are arranged in a stepped mode, non-powered mixing devices for automatically adding liquid are arranged between the pretreatment tank and the adjacent purification tank and between the adjacent purification tanks; the non-powered mixing device comprises a box body internally rotatably provided with a first gear and a second gear, a box cover sealingly arranged on the top of the box body, and a liquid storage tank arranged on the top of the box cover, liquid inlet pipes and water outlet pipes are arranged on the front and back sides of the box body respectively, a modified nano filter screen is internally arranged in the water outlet pipe, a flow guide pipe is connected to the lower side of the liquid storage tank and penetrates through the box cover, a trigger mechanism for controlling the opening and closing of the flow guide pipe is arranged in the box cover, and an inclined convex block matched with the trigger mechanism is fixedly arranged on the upper side of the second gear.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to a distributed ecological filter system for unpowered rural sewage treatment. BACKGROUND

[0002] With the development of social economy, the improvement of rural living environment and the treatment of rural domestic sewage are increasingly valued.

[0003] At present, the treatment mode of rural domestic sewage is mostly centralized treatment mode and integration into urban pipe network mode. The centralized treatment mode is a kind of treatment mode of decentralized collection and centralized treatment, which includes chemical toilet reconstruction, road breaking and restoration, pipe network laying, sewage treatment site construction and other engineering. It faces problems such as complex engineering, long construction period, low actual connection rate, large investment and difficult operation and maintenance in later period. The integration into urban pipe network mode is only suitable for rural areas around cities, which has the obvious disadvantage of small application range.

[0004] As a new type of sewage treatment technology, ecological filter has been widely used in rural sewage treatment. Ecological filter is a technology for sewage treatment based on ecological principles. Its main principle is to convert organic matter, nitrogen, phosphorus and other pollutants in sewage into harmless substances through the action of filter layer and biofilm layer, so as to achieve the purpose of purifying water quality. Compared with traditional sewage treatment methods, ecological filter has the following advantages: first, ecological filter does not need to use chemical agents, reducing the pollution to the environment; second, ecological filter can naturally treat sewage into irrigation water, saving water resources; third, the maintenance cost of ecological filter is low and easy to manage.

[0005] In the ecological filter, the liquid is uniformly distributed into the filter layer by spraying or drip irrigation, which acts together with the biofilm and microbial population in the filter layer to treat the sewage. The use of liquid can improve the treatment efficiency of ecological filter, speed up the sewage treatment speed, and also maintain the balance of microbial population in ecological filter, ensuring its long-term stable operation.

[0006] If the existing distributed ecological filter system for rural sewage treatment adds liquid in the ecological filter, it still needs to install a power source in most cases. Although the ecological filter itself has low maintenance cost, the power required for drip irrigation or spraying to add liquid increases the cost burden, which is not conducive to the popularization and use of ecological filter system. Therefore, it does not meet the existing demand, and for this purpose, we propose a distributed ecological filter system for unpowered rural sewage treatment. SUMMARY

[0007] The application provides a kind of unpowered rural sewage treatment distributed ecological filter system, with beneficial effect, solve the above-mentioned existing rural sewage treatment distributed ecological filter system if in ecological filter pool joins liquid, still need to install power source, although ecological filter pool itself maintenance cost is low, but the power needed for drip irrigation or spraying to join liquid increases the cost burden, it is not conducive to the popularization and use of ecological filter system problem.

[0008] The application provides the following technical scheme: a kind of unpowered rural sewage treatment distributed ecological filter system, including pre-treatment pool and purification pool, the purification pool is arranged in the side of the pre-treatment pool, the purification pool is provided with multiple, multiple the purification pool is arranged in ladder, the pre-treatment pool with adjacent the purification pool, and adjacent the purification pool is installed with the unpowered liquid mixer for automatically adding liquid between the purification pool;

[0009] The unpowered liquid mixer includes a box body with a first gear and a second gear rotatably installed inside, a box cover sealingly installed on the top of the box body, and a liquid storage tank installed on the top of the box cover, liquid inlet pipes and water outlet pipes are installed on the front and back sides of the box body respectively, a modified nano filter screen is installed inside the water outlet pipe, a flow guide pipe is connected to the lower side of the liquid storage tank, the flow guide pipe penetrates the box cover, a trigger mechanism is arranged inside the box cover for controlling the opening and closing of the flow guide pipe, and an inclined block is fixedly installed on the upper side of the second gear and cooperates with the trigger mechanism.

[0010] As an optional scheme of the unpowered rural sewage treatment distributed ecological filter system, the trigger mechanism includes a limiting cavity installed inside the box cover, the limiting cavity communicates with the inside of the box body and the inside of the flow guide pipe, an air bag is placed inside the limiting cavity, a movable block is installed at the bottom end of the air bag, a one-way valve is installed at the upper end of the flow guide pipe, and an overflow valve is installed at the lower end of the flow guide pipe.

[0011] As an optional scheme of the unpowered rural sewage treatment distributed ecological filter system, the air bag fills the limiting cavity, the abutting surfaces of the movable block and the inclined block are arranged as inclined surfaces corresponding to each other, when the flow guide pipe is filled with liquid and the one-way valve and the overflow valve are both in a closed state, the air bag deforms towards the box body, the movable block extends into the inside of the box body, and the inclined block slides in contact with the movable block as the second gear rotates.

[0012] As an optional scheme of the unpowered rural sewage treatment distributed ecological filter system, when the inclined block slides in contact with the movable block, the movable block moves upwards and deforms the air bag towards the flow guide pipe, the water pressure in the flow guide pipe increases, and the overflow valve opens.

[0013] As a kind of unpowered rural sewage treatment distributed ecological filter tank system of the application, wherein: the bottom side of the box cover is provided with sealing ring, the sealing ring is interference fit with the box body, the sealing ring is set as rubber ring.

[0014] As a kind of unpowered rural sewage treatment distributed ecological filter tank system of the application, wherein: the lower side of the first gear is coaxially provided with rotating shaft, the rotating shaft penetrates the box body, the rotating shaft is provided with stirring blade on side, for mixing sewage and the uniform liquid extruded by the unpowered mixing device.

[0015] As a kind of unpowered rural sewage treatment distributed ecological filter tank system of the application, wherein: the inner wall of the box body is provided with slide, the outer side of the box body is provided with water pressure channel, one end of the water pressure channel is connected with the slide, the other end of the water pressure channel is communicated with the middle part of the outlet pipe, the water pressure channel is slidably provided with movable column, the movable column is matched with the gap of the modified nano filter screen, the side wall of the movable column is provided with bristle for cleaning the modified nano filter screen.

[0016] As a kind of unpowered rural sewage treatment distributed ecological filter tank system of the application, wherein: the inside of the slide is slidably clamped and installed with inclined surface sliding block, the inner end of the movable column is installed with piston push plate, the inclined surface sliding block and the piston push plate respectively slide in the slide and the water pressure channel, the inclined surface sliding block and the piston push plate are filled with water, the inside of the water pressure channel is fixedly installed with fixed plate, the movable column penetrates the fixed plate, the outer side of the movable column is sleeved with spring, the spring is located between the fixed plate and the piston push plate.

[0017] As a kind of unpowered rural sewage treatment distributed ecological filter tank system of the application, wherein: when the second gear rotates, the gear teeth of the second gear contact with the inclined surface sliding block, the inclined surface sliding block moves to the direction of the water pressure channel, the piston push plate drives the movable column to move outward, the bristle cleans the modified nano filter screen;

[0018] The gear teeth are staggered with the inclined surface sliding block, and the spring drives the piston push plate, the movable column and the inclined surface sliding block to reset.

[0019] As a kind of unpowered rural sewage treatment distributed ecological filter tank system of the application, wherein: the side of the outlet pipe is provided with threaded interface, the outer side of the threaded interface is threadedly installed with dirty cover, the bristle is inclined, and the bristle is inclined to the direction of the dirty cover.

[0020] The application has the following beneficial effects:

[0021] 1. The unpowered rural sewage treatment distributed ecological filter system can carry out multiple sedimentation and purification on sewage through the setting of the pretreatment tank and multiple purification tanks, the water flow can flow down by the step setting, the unpowered liquid mixer is installed between the tanks, and the first gear, the second gear, the box body and the box cover are matched to combine a gear pump, when the water flow flows into the box body, the impact of the water flow drives the first gear and the second gear to rotate, when the first gear and the second gear rotate, the volume of the space on the disengagement side of the first gear and the second gear changes from small to large, a vacuum is formed to suck liquid, the volume of the space on the engagement side of the first gear and the second gear changes from large to small to squeeze liquid into the liquid outlet pipe, so that unpowered rotation is realized.

[0022] The inclined block is installed on the upper side of the second gear, when the second gear rotates, the inclined block can contact the movable block to make the movable block move up to change the shape of the air bag, so that the liquid is squeezed from the flow guide pipe into the box body to mix with the sewage in the box body, and unpowered addition of the liquid is realized.

[0023] The scheme has simple structure, does not need to install an additional power source during operation, saves power cost, reduces operation cost, and is beneficial to the use and promotion of the rural sewage treatment ecological filter.

[0024] 2. The unpowered rural sewage treatment distributed ecological filter system, through the coaxial installation of the rotating shaft below the first gear, the rotating shaft penetrates the box body, and the stirring blades are distributed on the outer side of the rotating shaft, when the first gear rotates, the rotating shaft can be driven to rotate, so that the stirring blades mix the sewage and the liquid to assist the liquid to play the effect.

[0025] 3. The unpowered rural sewage treatment distributed ecological filter system, through the cooperation of the inclined slide block and the piston push plate, when the second gear rotates, the protruding inclined slide block is contacted, so that the inclined slide block is pushed out, the inclined slide block drives the piston push plate to move through water pressure, so as to drive the movable column and the bristles to clean the modified nano filter screen; through the setting of the spring, when the teeth of the second gear are disengaged from the inclined slide block, the movable main body, the piston push plate and the inclined slide block will reset; through the setting of the dirt cover, the concentrated garbage can be cleaned. DETAILED DESCRIPTION

[0026] Figure 1 It is a whole structure schematic view of the application.

[0027] Figure 2 It is a three-dimensional structure schematic view of the unpowered liquid mixer of the application.

[0028] Figure 3 It is a three-dimensional structure schematic view of the unpowered liquid mixer of the application.

[0029] Figure 4 Figure 6 is a schematic diagram of the bottom view of the unpowered liquid mixer of the present application.

[0030] Figure 5 Figure 7 is a schematic diagram of the top view of the unpowered liquid mixer of the present application.

[0031] Figure 6 Figure 8 is a schematic diagram of the side view of the unpowered liquid mixer of the present application.

[0032] Figure 7 Figure 9 is a schematic diagram of the partial section view of the unpowered liquid mixer of the present application.

[0033] Figure 8 Figure 10 is a schematic diagram of the idle state of the unpowered liquid mixer of the present application.

[0034] Figure 9 Figure 11 is a schematic diagram of the working state of the unpowered liquid mixer of the present application.

[0035] Figure 1: 110, pretreatment tank; 120, purification tank; 200, unpowered liquid mixer; 210, liquid storage tank; 211, flow guide pipe; 212, one-way valve; 220, box cover; 221, sealing ring; 230, box body; 231, slide; 232, inclined slide block; 240, liquid inlet pipe; 250, water outlet pipe; 300, trigger mechanism; 310, first gear; 311, rotating shaft; 312, stirring blade; 320, second gear; 330, inclined protrusion; 340, movable protrusion; 350, limiting cavity; 360, air bag; 370, overflow valve; 400, modified nano filter screen; 410, movable column; 411, bristles; 420, fixed plate; 430, spring; 440, piston push plate; 450, water pressure channel; 460, threaded interface; 470, dirty cover. DETAILED DESCRIPTION

[0036] The technical solutions in 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. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present application.

[0037] Embodiment 1

[0038] The present embodiment aims to solve the problem that if a liquid distributor is added to the ecological filter of the existing distributed ecological filter system for rural sewage treatment, a power source still needs to be installed in most cases, although the ecological filter itself has low maintenance cost, the power required for drip irrigation or spraying to add the liquid distributor increases the cost burden, which is not conducive to the popularization and use of the ecological filter system. Please refer to Figures 1-9The application discloses a distributed ecological filter system for unpowered rural sewage treatment, which comprises a pretreatment tank 110 and purification tanks 120, wherein the purification tanks 120 are arranged at the side of the pretreatment tank 110 in a sinking mode, and a plurality of the purification tanks 120 are arranged in a stepped mode to realize multi-stage sedimentation and purification of sewage.

[0039] See Figure 1 The unpowered liquid mixer 200 for automatically adding liquid is arranged between the pretreatment tank 110 and the adjacent purification tank 120 and between the adjacent purification tanks 120.

[0040] The unpowered liquid mixer 200 comprises a box body 230 internally rotatably provided with a first gear 310 and a second gear 320, a box cover 220 sealingly arranged at the top of the box body 230, and a liquid storage tank 210 arranged at the top of the box cover 220, wherein the front and rear sides of the box body 230 are respectively provided with a liquid inlet pipe 240 and a water outlet pipe 250, the water outlet pipe 250 is internally provided with a modified nano filter screen 400, and the modified nano filter screen is a new type of nano filter membrane material, which is mainly characterized in that the surface of the filter membrane is chemically modified on the basis of an ordinary nano filter membrane, so that the nano filter membrane has higher selectivity and flux.

[0041] The liquid storage tank 210 is connected with a flow guide pipe 211 penetrating through the box cover 220, the box cover 220 is internally provided with a trigger mechanism 300 for controlling the opening and closing of the flow guide pipe 211, and the upper side of the second gear 320 is fixedly provided with an inclined convex block 330 matched with the trigger mechanism 300. The bottom side of the box cover 220 is provided with a sealing ring 221, the sealing ring 221 is in interference fit with the box body 230, and the sealing ring 221 is arranged as a rubber ring.

[0042] The first gear 310 and the second gear 320, the box body 230 and the box cover 220 are combined into a gear pump, the concept of the gear pump is very simple, the most basic form of the gear pump is that two gears with the same size are rotatably engaged in a closely matched shell, the inside of the shell is similar to a "8" shape, the two gears are arranged in the shell, and the outer diameter and the two sides of the gears are closely matched with the shell. The material from an extruder enters the space between the two gears through a suction port, and moves along the shell along with the rotation of the teeth, and is finally discharged when the two gears are engaged.

[0043] Specifically, see Figure 6 and Figure 7The trigger mechanism 300 comprises a limiting cavity 350 installed inside the box cover 220, the limiting cavity 350 is in communication with the inside of the box body 230 and the inside of the flow guide pipe 211, an air bag 360 is placed inside the limiting cavity 350, a movable lug 340 is installed at the bottom end of the air bag 360, a one-way valve 212 is installed at the upper end of the flow guide pipe 211, and an overflow valve 370 is installed at the lower end of the flow guide pipe 211, the overflow valve 370 in the embodiment is a direct-acting overflow valve. The one-way valve 212 and the overflow valve 370 are both commonly used valves, which are well known to those skilled in the art.

[0044] When the air bag 360 fills the limiting cavity 350, the abutting surface of the movable lug 340 and the inclined lug 330 is set as an inclined surface corresponding to each other, when the flow guide pipe 211 is filled with liquid and the one-way valve 212 and the overflow valve 370 are both in a closed state, the air bag 360 deforms towards the box body 230, the movable lug 340 extends into the inside of the box body 230, and the inclined lug 330 slides in contact with the movable lug 340 by rotating with the second gear 320.

[0045] When the inclined lug 330 slides in contact with the movable lug 340, the movable lug 340 moves upwards and drives the air bag 360 to deform towards the flow guide pipe 211, the water pressure in the flow guide pipe 211 increases, and the overflow valve 370 opens.

[0046] In the embodiment, the scheme utilizes the principle of a gear pump to realize the flow of agricultural wastewater, utilizes the rotation of the second gear 320 to realize the intermittent contact of the inclined lug 330 and the movable lug 340, thereby realizing automatic addition of liquid, and in operation, no additional power source needs to be installed, power cost is saved, operation cost is reduced, and the use and promotion of the rural wastewater treatment ecological filter are facilitated.

[0047] Embodiment 2

[0048] The embodiment aims to promote the solution to the problem that liquid mixing with wastewater is slow, and the embodiment is an improvement based on the embodiment 1, for details, please refer to Figures 1-9 A rotating shaft 311 is coaxially installed at the lower side of the first gear 310, and stirring blades 312 are distributed on the side of the rotating shaft 311 for mixing wastewater and liquid squeezed out of the non-powered liquid mixer 200. The rotating shaft 311 penetrates through the box body 230, and the stirring blades 312 are installed on the exposed part of the rotating shaft 311.

[0049] In the embodiment, when the first gear 310 rotates, the rotating shaft 311 can be driven to rotate, so that the stirring blades 312 mix the wastewater and the liquid, and assist the liquid to play a role.

[0050] Embodiment 3

[0051] The embodiment is intended to facilitate the solution to the problem that the rural sewage has many impurities and the garbage intercepted by the modified nano filter screen needs to be cleaned. The embodiment is an improvement based on the embodiment 1. For details, please refer to Figures 1-9 The inner wall of the box body 230 is provided with a slide 231, and the outer side of the box body 230 is provided with a water pressure channel 450. One end of the water pressure channel 450 is connected with the slide 231, and the other end of the water pressure channel 450 is in communication with the middle part of the water outlet pipe 250. The water pressure channel 450 is slidably provided with a movable column 410. The movable column 410 is in clearance fit with the modified nano filter screen 400. The side wall of the movable column 410 is provided with bristles 411 for cleaning the modified nano filter screen 400.

[0052] See Figure 8 and Figure 9 The inner part of the slide 231 is slidably provided with an inclined slide block 232. The inner end of the movable column 410 is provided with a piston push plate 440. The inclined slide block 232 and the piston push plate 440 respectively slide in the slide 231 and the water pressure channel 450. The inclined slide block 232 and the piston push plate 440 are filled with water. The inner part of the water pressure channel 450 is fixedly provided with a fixed plate 420. The movable column 410 penetrates through the fixed plate 420. The outer side of the movable column 410 is sleeved with a spring 430. The spring 430 is located between the fixed plate 420 and the piston push plate 440.

[0053] When the second gear 320 rotates, the teeth of the second gear 320 are in contact with the inclined slide block 232. The inclined slide block 232 moves to the direction of the water pressure channel 450. The piston push plate 440 drives the movable column 410 to move outward. The bristles 411 clean the modified nano filter screen 400. The teeth are staggered with the inclined slide block 232. The spring 430 drives the piston push plate 440, the movable column 410 and the inclined slide block 232 to reset.

[0054] The side part of the water outlet pipe 250 is provided with a threaded interface 460. The outer side of the threaded interface 460 is threadedly provided with a dirty cover 470. The bristles 411 are inclined. The bristles 411 are inclined to the direction of the dirty cover 470. When the bristles 411 brush, the garbage on the surface of the modified nano filter screen 400 can be brought to the direction of the dirty cover 470. The dirty cover 470 can be opened to clean the garbage. It is also convenient to maintain the modified nano filter screen 400.

[0055] In the embodiment, when the second gear 320 rotates, the teeth of the second gear 320 are in contact with the inclined slide block 232. The inclined slide block 232 drives the piston push plate 440 to move through the water pressure, so as to drive the movable column 410 and the bristles 411 to clean the modified nano filter screen 400.

[0056] It is to be noted that, as used in this document, the term "indicia" is intended to encompass any type of data, information, or other content, whether in the form of text, graphics, images, video, audio, or otherwise. It is also to be noted that, as used in this document, the terms "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily imply or suggest any actual relationship or order between the entities or operations. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0057] The above description is merely that of the preferred embodiments of the present application, and it is to be noted that various modifications and improvements made to the present application without departing from the technical principles of the present application shall fall within the scope of protection of the present application.

Claims

1. A distributed ecological filter system for rural sewage treatment without power, comprising a pretreatment tank (110) and a purification tank (120), characterized in that: The purification tank (120) is sunken and disposed on the side of the pretreatment tank (110). There are multiple purification tanks (120) arranged in a stepped manner. A non-powered mixer (200) for automatic addition of homogenizing liquid is installed between the pretreatment tank (110) and the adjacent purification tank (120) as well as between the adjacent purification tanks (120). The non-powered mixer (200) includes a housing (230) with a first gear (310) and a second gear (320) rotatably mounted inside, a cover (220) sealed on the top of the housing (230), and a storage tank (210) mounted on the top of the cover (220). An inlet pipe (240) and an outlet pipe (250) are respectively installed on the front and rear sides of the housing (230). A modified nano-filter (400) is installed inside the outlet pipe (250). A guide pipe (211) is connected to the lower side of the storage tank (210). The guide pipe (211) passes through the cover (220). A trigger mechanism (300) for controlling the opening and closing of the guide pipe (211) is provided inside the cover (220). A beveled protrusion (330) that cooperates with the trigger mechanism (300) is fixedly installed on the upper side of the second gear (320). The triggering mechanism (300) includes a limiting cavity (350) installed inside the cover (220). The limiting cavity (350) is connected to both the inside of the box body (230) and the inside of the guide tube (211). An airbag (360) is placed inside the limiting cavity (350). A movable protrusion (340) is installed at the bottom of the airbag (360). A one-way valve (212) is installed at the upper end of the guide tube (211), and an overflow valve (370) is installed at the lower end of the guide tube (211).

2. The distributed ecological filter system for non-powered rural sewage treatment according to claim 1, characterized in that: The airbag (360) fills the restricting cavity (350). The mating surfaces of the movable protrusion (340) and the inclined protrusion (330) are set as corresponding inclined surfaces. When the guide tube (211) is filled with liquid and the one-way valve (212) and the overflow valve (370) are both closed, the airbag (360) deforms towards the box (230). The movable protrusion (340) extends into the box (230). The inclined protrusion (330) rotates with the second gear (320) and slides in contact with the movable protrusion (340).

3. The distributed ecological filter system for non-powered rural sewage treatment according to claim 1, characterized in that: When the inclined protrusion (330) and the movable protrusion (340) slide into contact, the movable protrusion (340) moves upward and causes the airbag (360) to deform in the direction of the guide pipe (211), the water pressure inside the guide pipe (211) increases, and the overflow valve (370) opens.

4. A distributed ecological filter system for non-powered rural sewage treatment according to claim 1, characterized in that: A sealing ring (221) is installed on the bottom side of the lid (220). The sealing ring (221) is press-fitted with the box body (230). The sealing ring (221) is a rubber ring.

5. A distributed ecological filter system for non-powered rural sewage treatment according to claim 1, characterized in that: A rotating shaft (311) is coaxially mounted on the lower side of the first gear (310). The rotating shaft (311) passes through the box body (230). Stirring blades (312) are distributed on the side of the rotating shaft (311) for mixing sewage and the homogenized liquid extruded by the non-powered mixer (200).

6. A distributed ecological filter system for non-powered rural sewage treatment according to claim 1, characterized in that: The inner wall of the box (230) is provided with a slide (231), and a water pressure channel (450) is installed on the outer side of the box (230). One end of the water pressure channel (450) is connected to the slide (231), and the other end of the water pressure channel (450) is connected to the middle of the water outlet pipe (250). A movable column (410) is slidably installed inside the water pressure channel (450). The movable column (410) is in clearance fit with the modified nanofilter (400). The side wall of the movable column (410) is provided with bristles (411) for cleaning the modified nanofilter (400).

7. A distributed ecological filter system for non-powered rural sewage treatment according to claim 6, characterized in that: An inclined slider (232) is slidably engaged inside the slide rail (231). A piston push plate (440) is installed at the inner end of the movable column (410). The inclined slider (232) and the piston push plate (440) slide in the slide rail (231) and the water pressure channel (450) respectively. Water fills the space between the inclined slider (232) and the piston push plate (440). A fixing plate (420) is fixedly installed inside the water pressure channel (450). The movable column (410) passes through the fixing plate (420). A spring (430) is sleeved on the outside of the movable column (410). The spring (430) is located between the fixing plate (420) and the piston push plate (440).

8. A distributed ecological filter system for non-powered rural sewage treatment according to claim 7, characterized in that: When the second gear (320) rotates, the teeth of the second gear (320) contact the inclined slider (232), the inclined slider (232) moves toward the water pressure channel (450), the piston push plate (440) drives the movable column (410) to move outward, and the bristles (411) clean the modified nanofilter (400); The teeth are misaligned with the inclined slider (232), and the spring (430) drives the piston push plate (440), the movable column (410) and the inclined slider (232) to reset.

9. A distributed ecological filter system for non-powered rural sewage treatment according to claim 7, characterized in that: The side of the water outlet pipe (250) is equipped with a threaded interface (460), and a dirt cover (470) is installed on the outer thread of the threaded interface (460). The bristles (411) are inclined and the bristles (411) are inclined toward the dirt cover (470).

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