CN118405818B - Integrated rural domestic sewage treatment system - Google Patents

Abstract

The invention discloses an integrated rural domestic sewage treatment system, which relates to the technical field of domestic sewage treatment and comprises the following components: the sewage treatment device comprises a sewage pipe, a sewage tank buried in the ground and a sewage tank arranged on one side of the sewage tank, wherein a sedimentation chamber, an anaerobic chamber, an aerobic chamber and a disinfection chamber are sequentially arranged in the sewage tank in a separated mode from left to right, and the sedimentation chamber is in butt joint with the sewage pipe; the top of the sewage tank is provided with a plurality of reflux pumps, the inside of the sewage tank is provided with a plurality of sewage disposal devices connected with the reflux pumps, and the water inlet end of the sewage tank is provided with a particle filtering device. The invention adsorbs away the particulate matters in the sewage in a large area through the particulate matter filtering device, and plays a role in filtering the sewage in advance, thereby reducing the sludge deposition in the sewage tank; the return pump is started to suck the sludge deposited at the bottom of the sewage tank through the sewage cleaning pipe, and meanwhile, the upper half part of the blade wheel is driven to start rotating, so that the scraping plate is driven to continuously scrape the residual sludge on the bottom wall of the sewage tank, and the period of manual picking and cleaning is prolonged.

Description

An integrated rural domestic sewage treatment system

Technical Field

The invention relates to the technical field of domestic sewage treatment, and in particular to an integrated rural domestic sewage treatment system.

Background Art

Rural domestic sewage discharge is characterized by dispersed sources and small sewage generation in a single village. Sewage treatment is decentralized and it is impossible to arrange full-time personnel to discharge sludge regularly. In addition, if large-scale sludge treatment facilities are used to dispose of the sludge, the cost-effectiveness is too low.

Chinese utility model patent CN220887199U discloses a PE integrated rural domestic sewage treatment system, including a cylindrical outer barrel and an outer barrel cover used in conjunction with the outer barrel, a manhole cover is provided on the outer barrel cover, an anoxic tank, a high-load reaction tank, a low-load reaction tank and a central sedimentation tank are provided inside the outer barrel, the anoxic tank, the high-load reaction tank and the low-load reaction tank are fan-shaped structures, the central sedimentation tank is a circular structure, the anoxic tank, the high-load reaction tank and the low-load reaction tank are surrounded outside the central sedimentation tank, and at the same time, an inlet pipe and an outlet pipe are provided on the outer barrel, the inlet pipe is connected to the anoxic tank, and the outlet pipe is connected to the central sedimentation tank. However, this technical solution is relatively cumbersome when cleaning internal sediments, and the cleaning is not thorough, the cleaning cycle is short, resulting in increased cleaning costs, and it is not convenient for rural households to maintain efficient sewage purification for a long time.

Summary of the invention

In order to overcome the defects in the prior art, the purpose of the present invention is to provide an integrated rural domestic sewage treatment system to reduce the amount of sludge deposition in the sewage tank and improve the efficiency of rural domestic sewage purification.

To achieve the above-mentioned purpose, the present invention provides an integrated rural domestic sewage treatment system, comprising: a sewage pipe, a sewage tank buried in the ground and a sludge box arranged on one side thereof; the interior of the sewage tank is provided with a sedimentation chamber, an anaerobic chamber, an aerobic chamber and a disinfection chamber from left to right, and the sedimentation chamber is connected to the sewage pipe; a plurality of lifting pumps are arranged inside the sewage tank, a plurality of reflux pumps are arranged on the top of the sludge box, a plurality of cleaning devices connected to the reflux pumps and used for cleaning the sludge on the bottom wall of the sewage tank are arranged inside the sewage tank, and a particle filtering device for filtering particles in the sewage is arranged at the water inlet end of the sewage tank;

The cleaning device comprises a plurality of cleaning pipes disposed at the bottom of the sewage tank, scrapers rotatably connected to both sides of the cleaning pipes, movable scrapers attached to the sides of the scrapers, and a blade wheel disposed on the inner wall of the cleaning pipe and coaxially connected to the rotating shaft of the scraper, wherein the scraper is an asymmetric arc plate structure and matches one side of the bottom wall of the sewage tank, and a spoiler is disposed on the inner wall of the cleaning pipe and located at the lower half of the blade wheel, and the spoiler is located in the direction of the blade wheel toward the water inlet end of the cleaning pipe;

The particle filtering device includes a pair of water pipes, a filter tube sleeved between the pair of water pipes, and a replaceable filter cover that is clamped on both radial sides of the filter tube; one of the water pipes is sleeved with the sewage pipe, and the other water pipe is connected to the top of the sedimentation chamber. The outer side of the filter tube is radially symmetrically provided with a bayonet, and the filter cover is clamped with the bayonet. A filter element for intercepting particulate matter in sewage is bonded to the inner wall of the filter cover, and the filter tube can rotate between the pair of water pipes.

In the technical solution of the present invention, lift pumps and cleaning devices are distributed inside the sedimentation chamber, anaerobic chamber and aerobic chamber, and inspection ports are provided on the tops of the sedimentation chamber, wherein a water injection pipe is provided on the side wall of the inspection port above the sedimentation chamber, and the water injection pipe is socketed with another water pipe.

In the technical solution of the present invention, an aeration hood is provided above the aerobic chamber, an aeration machine is installed inside the aeration hood, a lifting plate for overlapping the two inner walls of the bottom of the sewage tank is installed at the bottom of the lifting pump, and the outlet pipe of the lifting pump extends upward to the top of the sewage tank and passes through the next chamber.

In the technical solution of the present invention, the sewage cleaning pipe is arranged along the central axis direction of the sewage tank. The sewage cleaning pipe has a square tube structure and a rectangular sealing base is provided at the bottom. The sealing base is attached to and fixedly connected to the bottom of the sewage tank. One end of the sewage cleaning pipe is connected to a return pipe, which passes through the bottom wall of the sewage tank and is sleeved with the water inlet pipe of the reflux pump.

In the technical solution of the present invention, a plurality of pairs of insertion holes are provided at equal intervals on the two side walls at the top of the cleaning pipe, the rotating shaft end of the scraper is plugged into the insertion hole, a plug rod is provided on one side of the top of the spoiler block and is plugged into the center hole of the blade wheel, and the bottom surface of the spoiler block is in parallel contact with the bottom surface of the cleaning pipe.

In the technical solution of the present invention, a sliding groove pointing to the center of the scraper is provided on the side of the scraper, and a sliding block is provided at the top of the back side of the movable scraper, which is engaged with the sliding groove and can slide. A long axis is embedded between the upper and lower ends of the sliding groove and a spring is provided on the outer sleeve of the long axis, and the spring is located on the top surface of the sliding block.

In the technical solution of the present invention, a card slot is opened on the outside of the filter tube and in the middle of both ends of the card slot, and a card column is protruded from the middle of both ends of the filter cover, and the card column is engaged with the card slot, and the two inner walls of the card slot are embedded with a limiting piece for clamping the card column, and the limiting piece is made of spring steel and has a hollow arrow structure.

In the technical solution of the present invention, a connecting cover is arranged between the filter tube and the top of the water pipe, and a connecting rod is rotatably connected to one side of the bottom of the connecting cover, and the connecting rod is slidably connected to the outer wall of the filter tube, and the top surface of the water pipe is symmetrically provided with protrusions that are engaged with the connecting cover; a transmission gear is rotatably connected to the inside of one of the connecting covers, and a through opening is provided on the top surface of one of the water pipes and located between a pair of protrusions, and an annular groove is provided on the outer side of one end of the filter tube located at the through opening, and a plurality of conical convex teeth are arranged in a circular shape with equal intervals in the annular groove, and the transmission gear passes through the through opening and meshes with the plurality of conical convex teeth.

In the technical solution of the present invention, connecting rings are symmetrically provided on both sides of the bottom of the connecting cover, the two ends of the connecting rod are rotatably connected to the connecting rings, an inverted T-shaped sliding column is provided on one side of the middle part of the connecting rod, and a limiting groove is provided on the outer side of the filter tube near the bayonet, and the sliding column is adapted to be snap-fitted and slidable with the limiting groove.

In the technical solution of the present invention, finger grooves are provided on both sides of the middle of the filter cover, and one end of the transmission gear penetrates to the outside of the connection cover and is clamped with a crank handle.

Compared with the prior art, the present invention has the following beneficial effects:

1. The integrated rural domestic sewage treatment system of the present invention has a particle filter device set up. The sewage flows through the particle filter device through the sewage pipe and passes through the bottom of the filter tube. The filter element on the filter cover absorbs the particles over a large area, which plays a role in filtering the sewage in advance, thereby reducing the amount of sludge deposition in the sewage tank.

2. The integrated rural domestic sewage treatment system of the present invention uses a sewage cleaning device arranged at the bottom of the sewage tank, and the sludge deposited in the sewage tank is sucked out through the sewage cleaning pipe by starting the reflux pump, and at the same time drives the upper half of the impeller to start rotating, and drives the scraper to continuously scrape off the residual sludge on the bottom wall of the sewage tank and move it toward the open end of the sewage cleaning pipe, so that it is smoothly sucked out, thereby extending the cycle of manual digging and cleaning.

3. The integrated rural domestic sewage treatment system of the present invention is provided with a movable scraper attached to the side of the scraper, so that the movable scraper can automatically extend outward by spring action during the rotation of the scraper, and telescope toward the center of the circle, and touch the places where the scraper cannot reach the bottom wall of the sewage tank, so that the bottom wall of the sewage tank is cleaned without omission.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is an overall structural diagram of a rural domestic sewage treatment system according to the present invention;

FIG2 is a schematic diagram of the internal assembly structure of a sewage tank of the present invention;

FIG3 is a front view of the internal assembly structure of the sewage tank of the present invention;

FIG4 is a schematic diagram of the assembly structure of the pollution cleaning device of the present invention;

FIG5 is a schematic diagram of the structure of the sewage cleaning pipe of the present invention;

FIG6 is a schematic diagram of the assembly structure of the scraper and movable scraper of the present invention;

FIG7 is a disassembled view of the scraper and movable scraper assembly of the present invention;

FIG8 is a schematic diagram of the back structure of the movable scraper of the present invention;

FIG9 is a schematic diagram of the assembly structure of the particle filter device of the present invention;

FIG10 is an assembly front view of the filter tube of the present invention in a fully cutaway state;

FIG11 is a schematic diagram of the structure of the filter tube of the present invention in a fully cutaway state;

FIG12 is an assembly and disassembly diagram of the particle filter device of the present invention;

FIG13 is a disassembled view of the connection cover assembly of the present invention;

FIG. 14 is a schematic diagram showing the distribution of a pair of limit members of the present invention.

Description of reference numerals:

100, sewage tank; 101, sedimentation chamber; 102, anaerobic chamber; 103, aerobic chamber; 104, disinfection chamber; 110, inspection port; 111, water injection pipe; 120, aeration hood; 130, lifting pump; 131, lifting plate;

200, sludge box; 210, return pump; 220, cleaning device; 221, cleaning pipe; 2211, plug hole; 2212, sealing base; 222, scraper; 2221, slide; 2222, spring; 223, movable scraper; 2231, slider; 224, blade wheel; 225, spoiler; 2251, plug rod; 230, return pipe;

300, particle filtering device; 310-1, first water pipe; 310-2, second water pipe; 311, opening; 312, protrusion; 320, filter tube; 321, bayonet; 322, slot; 323, limit slot; 324, annular slot; 325, conical convex teeth; 330, filter cover; 331, filter element; 332, clamping column; 333, finger groove; 340, connecting cover; 341, connecting ring; 342, connecting rod; 3421, sliding column; 343, transmission gear; 344, crank handle; 350, limit member.

DETAILED DESCRIPTION

The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be regarded as falling within the scope of the present invention. The terms "installation" and "connection" should be understood in a broad sense, which can be directly connected or indirectly connected through an intermediate medium.

The terms "central axis", "vertical", "horizontal", "front", "back", "up", "down", "left", "right", "top", "bottom", "inside", "outside" and the like used herein to indicate positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

The present invention provides an integrated rural domestic sewage treatment system, as shown in FIG1 , comprising: a sewage pipe connected to a water pool at home, a sewage tank 100 buried in the ground and a sludge box 200 arranged on one side thereof.

As shown in FIG3 , the interior of the sewage tank 100 is divided into a sedimentation chamber 101, an anaerobic chamber 102, an aerobic chamber 103 and a disinfection chamber 104 from left to right, and the sedimentation chamber 101 is connected to the sewage pipe; the sedimentation chamber 101 is used to precipitate suspended matter in the water, and it uses the natural sedimentation or coagulation sedimentation of water to remove suspended matter in the water; the anaerobic chamber 102 is an area where treatment is carried out in an oxygen-free environment, and mainly uses anaerobic microorganisms to degrade organic waste; the aerobic chamber 103 is an area where treatment is carried out in the presence of oxygen, and mainly uses aerobic microorganisms to oxidize and decompose organic matter; the disinfection chamber 104 is mainly used to eliminate bacteria, viruses, parasites and other microbial contamination in the water for easy access.

In one embodiment of the present invention, a plurality of lifting pumps 130 are provided inside the sewage tank 100 for pumping water from different chambers in the sewage tank 100, that is, transferring water from the sedimentation chamber 101 to the anaerobic chamber 102, then to the aerobic chamber 103, and then to the disinfection chamber 104; a plurality of reflux pumps 210 are provided on the top of the sludge box 200 for pumping out the sediment at the bottom of the sewage tank 100 for cleaning; a plurality of cleaning devices 220 connected to the reflux pumps 210 and used for cleaning the sludge on the bottom wall of the sewage tank 100 are provided inside the sewage tank 100, so as to completely remove the residue on the inner wall of the sewage tank 100, thereby extending the period of manual digging and cleaning.

Specifically, the cleaning device 220 includes a plurality of cleaning pipes 221 disposed at the bottom of the sewage tank 100, a plurality of groups of scrapers 222 rotatably connected to both sides of the cleaning pipes 221, movable scrapers 223 attached to the sides of the scrapers 222, and a blade wheel 224 disposed on the inner wall of the cleaning pipe 221 and coaxially connected to the rotating axis of the scraper 222; the scraper 222 is an asymmetric arc plate structure and matches one side of the bottom wall of the sewage tank 100, and a spoiler 225 is disposed on the inner wall of the cleaning pipe 221 and located at the lower half of the blade wheel 224, that is, it is used to block the lower half of the blade wheel 224, so that the water flows from the upper half of the blade wheel 224 and drives the blade wheel 224 to rotate in a predetermined direction, and the spoiler 225 is located in the direction of the blade wheel 224 toward the water inlet end of the cleaning pipe 221, that is, it serves to guide the path through which the water flows.

When the reflux pump 210 is used to suck the sludge deposited at the bottom of the sewage tank 100 through the cleaning pipe 221, the upper half of the impeller 224 starts to rotate, and the scraper 222 is driven to continuously scrape the residual sludge on the bottom wall of the sewage tank 100 and move it toward the open end of the cleaning pipe 221 so that it can be sucked smoothly.

Furthermore, as shown in FIG2 , lift pumps 130 and sewage cleaning devices 220 are distributed inside the sedimentation chamber 101, the anaerobic chamber 102 and the aerobic chamber 103. Inspection ports 110 are provided at the tops of the sedimentation chamber 101, the anaerobic chamber 102 and the aerobic chamber 103 for manual regular scooping and treatment. A water injection pipe 111 is provided on the side wall of the inspection port 110 located above the sedimentation chamber 101. The water injection pipe 111 is sleeved and matched with the second water pipe 310-2 so as to introduce domestic sewage into the sedimentation chamber 101 for sedimentation treatment.

Furthermore, an aeration hood 120 is provided above the aerobic chamber 103, and an aerator is installed inside the aeration hood 120 for pumping air into the aerobic chamber 103 to supplement oxygen so that aerobic bacteria and aerobic microorganisms can efficiently convert organic matter into carbon dioxide and water.

Furthermore, a lifting plate 131 is installed at the bottom of the lifting pump 130 for overlapping the two inner walls of the bottom of the sewage tank 100, so that the lifting pump 130 is lifted off the bottom surface of the sewage tank 100 and smoothly sucks the sewage; the outlet pipe of the lifting pump 130 extends upward to the top of the sewage tank 100 and passes through the next chamber, so that the sewage can be treated and purified in turn.

Specifically, as shown in Figures 4 and 5, the sewage cleaning pipe 221 is arranged along the central axis direction of the sewage tank 100. The sewage cleaning pipe 221 is a square tube structure and a rectangular sealing base 2212 is provided at the bottom. The sealing base 2212 is attached to and fixedly connected to the bottom of the sewage tank 100, so as to disperse the sludge to both sides of the sewage cleaning pipe 221; one end of the sewage cleaning pipe 221 is connected to the return pipe 230, the return pipe 230 passes through the bottom wall of the sewage tank 100 and is sleeved with the water inlet pipe of the reflux pump 210.

Further, as shown in Figures 6 and 7, a plurality of pairs of sockets 2211 are provided at equal intervals on both side walls at the top of the sewage cleaning pipe 221, the rotating shaft end of the scraper 222 is plugged into the socket 2211, and a plug rod 2251 is provided on one side of the top of the spoiler block 225 for plugging into the center hole of the impeller 224. The bottom surface of the spoiler block 225 is in parallel contact with the bottom surface of the sewage cleaning pipe 221, i.e., the spoiler block 225 is prevented from being driven to rotate by the flow of water, thereby always sealing the water flow impact on the lower half of the impeller 224, so that the impeller 224 maintains directional rotation, and the scraper 222 always rotates in a directional manner to scrape off the residue on the inner wall of the sewage tank 100.

Furthermore, a slide groove 2221 pointing to the center of the scraper 222 is provided on the side surface, as shown in FIG8 , a slider 2231 is provided at the top of the back surface of the movable scraper 223, which is engaged with the slide groove 2221 and can slide, so that the movable scraper 223 can extend and retract toward the center of the circle during the rotation of the scraper 222, and touch the place where the scraper 222 cannot scrape the bottom wall of the sewage tank 100, so that the bottom wall of the sewage tank 100 is cleaned without omission; a long axis is embedded between the upper and lower ends of the slide groove 2221 and a spring 2222 is provided on the outer sleeve of the long axis, and the spring 2222 is located on the top surface of the slider 2231, that is, the spring 2222 is used to bounce the movable scraper 223 to automatically extend outward.

In addition, a particle filtering device 300 for filtering particulate matter in the sewage is provided at the water inlet end of the sewage tank 100, so as to clean the particulate matter in the sewage in advance and reduce the pressure of subsequent processing links.

As shown in Figure 9, the particle filtering device 300 includes a pair of water pipes, which are respectively denoted as the first water pipe 310-1 and the second water pipe 310-2, a filter tube 320 sleeved between the first water pipe 310-1 and the second water pipe 310-2, and a replaceable filter cover 330 clamped on both radial sides of the filter tube 320; wherein the first water pipe 310-1 is sleeved and matched with the sewage pipe, and the second water pipe 310-2 is connected to the top of the sedimentation chamber 101, so as to form a sewage flow path; the first water pipe 310-1 and the second water pipe 310-2 are in a conical cylinder structure and are larger than the diameter of the sewage pipe, so that the sewage in the sewage pipe disperses and flows when flowing into the water pipe, and contacts the filter cover 330 with a large area to be filtered.

As shown in Figures 10 and 11, the outer side of the filter tube 320 is radially symmetrically provided with a bayonet 321, and the filter cover 330 is snap-fitted with the bayonet 321 to facilitate replacement of the filter cover 330; a filter element 331 for intercepting particulate matter in sewage is bonded to the inner wall of the filter cover 330, and the filter element 331 is made of cotton felt cloth so as to utilize its porous structure to absorb particulate matter; the filter tube 320 can be rotated between the first water pipe 310-1 and the second water pipe 310-2 to replace the filter cover 330 and then clean the filter element 331.

Specifically, as shown in Figure 12, a slot 322 is provided on the outside of the filter tube 320 and in the middle of both ends of the bayonet 321, and a clamping column 332 is protruded from the middle of both ends of the filter cover 330. The clamping column 332 is clamped with the slot 322, and the two inner walls of the slot 322 are embedded with a limiting piece 350 for clamping the clamping column 332.

As shown in FIG. 14 , the limit member 350 is made of spring steel and has a hollow arrow structure, that is, the limit member 350 uses its elasticity to clamp the limit column 332 in the slot 322 to ensure that the filter cover 330 and the filter tube 320 are connected as a whole.

Furthermore, a connecting cover 340 is provided between the filter tube 320 and the top of the water pipe, and a connecting rod 342 is rotatably connected to one side of the bottom of the connecting cover 340. The connecting rod 342 is slidably connected to the outer wall of the filter tube 320, and a protrusion 312 that is engaged with the connecting cover 340 is symmetrically provided on the top surface of the water pipe, so that the water pipe and the filter tube 320 are connected as a whole.

Among them, a transmission gear 343 is rotatably connected inside the connecting cover 340 at the top of the first water pipe 310-1, and a through opening 311 is opened on the top surface of the first water pipe 310-1 and located between a pair of protrusions 312. The filter tube 320 is located at the outer side of one end of the through opening 311 and has an annular groove 324. A plurality of conical convex teeth 325 are arranged in a circular shape with equal intervals in the annular groove 324. The transmission gear 343 passes through the through opening 311 and meshes with the plurality of conical convex teeth 325, so that the rotation of the transmission gear 343 drives the filter tube 320 to rotate, so as to replace the filter cover 330.

Further, as shown in Figure 13, connecting rings 341 are symmetrically provided on both sides of the bottom of the connecting cover 340, both ends of the connecting rod 342 are sleeved with the connecting rings 341 and can rotate, and a sliding column 3421 in an inverted T shape is provided on one side of the middle of the connecting rod 342, and a limiting groove 323 is provided on the outer side of the filter tube 320 and close to the bayonet 321. The sliding column 3421 and the limiting groove 323 are adapted to be engaged and slidable, so that the connecting cover 340 and the filter tube 320 are slidably connected and do not slip off, so as to be used as a whole, and by flipping the connecting cover 340 and engaging with a pair of protrusions 312, a state in which the water pipe and the filter tube 320 are close together is formed.

Finger grooves 333 are provided on both sides of the middle of the filter cover 330 so that fingers can be caught in the finger grooves 333 to forcefully remove the filter cover 330; one end of the transmission gear 343 passes through the outside of the connecting cover 340 and is clamped with a crank 344 so that the crank 344 can be turned to control the rotation of the transmission gear 343.

Furthermore, in the integrated rural domestic sewage treatment system of the present embodiment, when the sewage is working, the sewage flows through the particle filter device 300 through the sewage pipe, passes through the bottom of the filter tube 320, and the filter element 331 on the filter cover 330 absorbs particulate matter over a large area, which plays a role in filtering the sewage in advance, thereby reducing the amount of sludge deposited in the sewage tank 100; and the sludge deposited in the sewage tank 100 is sucked out of the bottom of the sewage tank 100 through the sewage cleaning pipe 221 by starting the reflux pump 210, and at the same time drives the upper half of the impeller 224 to start rotating, and drives the scraper 222 to continuously scrape off the residual sludge on the bottom wall of the sewage tank 100, and moves toward the open end of the sewage cleaning pipe 221, so that it is smoothly sucked out, thereby extending the cycle of manual extraction and cleaning.

It should be noted that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. An integrated rural domestic sewage treatment system comprising: the sewage treatment device comprises a sewage pipe, a sewage tank (100) buried in the ground and a sludge box (200) arranged on one side of the sewage tank (100), wherein a sedimentation chamber (101), an anaerobic chamber (102), an aerobic chamber (103) and a disinfection chamber (104) are sequentially arranged in the sewage tank (100) in a separated mode from left to right, and the sedimentation chamber (101) is in butt joint with the sewage pipe; the sewage tank (100) is internally provided with a plurality of lift pumps (130), the top of the sludge tank (200) is provided with a plurality of reflux pumps (210), and is characterized in that: a plurality of sewage cleaning devices (220) which are connected with a reflux pump (210) and are used for cleaning the sludge on the bottom wall of the sewage tank (100) are arranged in the sewage tank (100), and a particle filtering device (300) used for filtering particles in sewage is arranged at the water inlet end of the sewage tank (100);

the sewage disposal device (220) comprises a sewage disposal pipe (221) arranged at the bottom of the sewage tank (100), a plurality of groups of scrapers (222) rotatably connected to two sides of the sewage disposal pipe (221), movable scrapers (223) attached to the sides of the scrapers (222) and blade wheels (224) arranged on the inner wall of the sewage disposal pipe (221) and coaxially connected with a rotating shaft of the scrapers (222), the scrapers (222) are in an asymmetric arc plate structure and are matched with one side of the bottom wall of the sewage tank (100), turbulence blocks (225) are arranged on the inner wall of the sewage disposal pipe (221) and are positioned on the lower half parts of the blade wheels (224), and the turbulence blocks (225) are positioned in the direction of the water inlet ends of the blade wheels (224) towards the sewage disposal pipe (221).

The particle filtering device (300) comprises a first water through pipe (310-1), a second water through pipe (310-2), a filtering pipe (320) sleeved between the first water through pipe (310-1) and the second water through pipe (310-2) and a replaceable filtering cover (330) clamped on two radial sides of the filtering pipe (320);

The first water through pipe (310-1) is in sleeve joint fit with the sewage pipe, and the second water through pipe (310-2) is communicated and connected with the top of the settling chamber (101); bayonet (321) are symmetrically arranged on the outer side of the filter pipe (320) in a radial direction, the filter cover (330) is in clamping fit with the bayonet (321), a filter piece (331) for intercepting particles in sewage is adhered to the inner wall of the filter cover (330), and the filter pipe (320) can rotate between the first water through pipe (310-1) and the second water through pipe (310-2);

the sewage disposal pipe (221) is arranged along the central axis direction of the sewage tank (100), is in a square pipe structure, is provided with a cuboid sealing base (2212) at the bottom, and one end of the sewage disposal pipe (221) is connected with a return pipe (230); the back cover base (2212) is attached to the bottom of the sewage tank (100) and fixedly connected with the bottom of the sewage tank, and the return pipe (230) penetrates through the bottom wall of the sewage tank (100) and is in sleeve joint fit with the water inlet pipe of the return pump (210);

A plurality of pairs of insertion holes (2211) are formed in the two side walls of the top of the dirt cleaning pipe (221) at equal intervals, the rotating shaft end of the scraping plate (222) is inserted into the insertion holes (2211), an inserted rod (2251) inserted into the central hole of the blade wheel (224) is arranged on one side of the top of the turbulence block (225), and the bottom surface of the turbulence block (225) is in parallel contact with the bottom surface of the dirt cleaning pipe (221);

A sliding groove (2221) pointing to the circle center is formed in the side face of the scraper blade (222), a sliding block (2231) which is clamped with the sliding groove (2221) and can slide is arranged at the top of the back face of the movable scraper blade (223), a long shaft is embedded between the upper end and the lower end of the sliding groove (2221), a spring (2222) is sleeved outside the long shaft, and the spring (2222) is located on the top face of the sliding block (2231);

Clamping grooves (322) are formed in the middle parts of the two ends of the bayonet (321) on the outer side of the filter tube (320), clamping columns (332) are arranged in the middle parts of the two ends of the filter cover (330) in a protruding mode, and the clamping columns (332) are clamped with the clamping grooves (322);

Limiting pieces (350) for clamping the clamping columns (332) are embedded into the two inner walls of the clamping grooves (322), and the limiting pieces (350) are of hollow arrow structures and made of spring steel;

A connecting cover (340) is arranged between the filter pipe (320) and the top of each water pipe, one side of the bottom of the connecting cover (340) is rotationally connected with a connecting rod (342), the connecting rod (342) is in sliding connection with the outer wall of the filter pipe (320), and the top surface of each water pipe is symmetrically provided with a bump (312) which is clamped with the connecting cover (340);

Wherein, be connected with drive gear (343) with the inside rotation of connecting cover (340) at first water pipe (310-1) top, first water pipe (310-1) top surface just is located and has offered through-hole (311) between a pair of lug (312), filter tube (320) are located through-hole (311) one end outside, and have offered ring channel (324), be annular equidistant in ring channel (324) and be equipped with a plurality of toper dogteeth (325), drive gear (343) pass through-hole (311) and with toper dogtooth (325) meshing.

2. The integrated rural domestic sewage treatment system according to claim 1, wherein: at least 3 groups of lifting pumps (130) and the cleaning devices (220) are respectively distributed in the settling chamber (101), the anaerobic chamber (102) and the aerobic chamber (103); a lifting plate (131) which is used for being lapped between two inner walls of the bottom of the sewage tank (100) is arranged at the bottom of the lifting pump (130), and a water outlet pipe of the lifting pump (130) extends upwards to the top of the sewage tank (100) and sequentially penetrates through the sedimentation chamber (101), the anaerobic chamber (102) and the aerobic chamber (103); the top of settling chamber (101), anaerobic chamber (102) and good oxygen room (103) all communicates and is equipped with inspection port (110), and wherein the inspection port (110) lateral wall intercommunication that is located settling chamber (101) top is equipped with water injection pipe (111), water injection pipe (111) cup joint the cooperation with second water through pipe (310-2).

3. The integrated rural domestic sewage treatment system according to claim 2, wherein: an aeration cover (120) is communicated with the upper part of the aerobic chamber (103), and an aerator is arranged in the aeration cover (120) and is used for pumping air into the aerobic chamber (103).

4. The integrated rural domestic sewage treatment system according to claim 1, wherein: the bottom bilateral symmetry of connecting cover (340) is equipped with go-between (341), the both ends and go-between (341) of connecting rod (342) cup joint and rotatable, middle part one side of connecting rod (342) is equipped with and is smooth post (3421) of falling T type, spacing groove (323) have been seted up in the outside of filter tube (320) and be close to bayonet socket (321) department, smooth post (3421) and spacing groove (323) looks adaptation joint and slidable.

5. The integrated rural domestic sewage treatment system according to claim 4, wherein: finger grooves (333) are formed in two sides of the middle of the filter cover (330), and one end of the transmission gear (343) penetrates through the outer portion of the connecting cover (340) and is clamped with a rocking handle (344).