CN115581963A - Hydraulic energy driving type centrifugal sewage filtering system and sewage filtering method thereof - Google Patents

Abstract

The invention discloses a water energy-driven centrifugal sewage filtering system and a sewage filtering method thereof, and relates to the technical field of sewage treatment. In the present invention, an annular water channel is arranged in the wall of the sewage treatment tank, and the annular water channel is connected with the sewage input structure; the double filter mechanism rotates inside the sewage treatment tank; the flowing water flow inside the annular water channel impacts the double filter mechanism to realize its rotation; the double filter mechanism The bottom of the hemispherical sieve body is provided with a sealing ring body; the sealing ring body is sleeved on the sewage input structure, and the sewage in the annular waterway is transported to the hemispherical sieve body through the sewage input structure. The invention drives the hemispherical sieve body to rotate through the sewage, and realizes the primary filtration of sewage under the centrifugal force generated by the rotation of the hemispherical sieve body, and at the same time realizes the secondary filtration of sewage under the centrifugal force generated by the rotation of the sealing ring body, so that it can be realized only by driving water energy The dual filtration effect of sewage effectively realizes the efficient utilization of kinetic energy of incoming water.

Description

A water energy driven centrifugal sewage filtration system and sewage filtration method thereof

technical field

The invention belongs to the technical field of sewage treatment, and in particular relates to a water energy-driven centrifugal sewage filtering system and a sewage filtering method thereof.

Background technique

If chemical wastewater is discharged without treatment, it will cause different types and degrees of pollution to the water body, thereby endangering human health and affecting industrial and agricultural production. Therefore, various processing treatments are required before the wastewater is discharged, and finally filtered. Finally, the impurity particles in the wastewater are separated from the water body.

In the existing sewage centrifugal filtration system, the rotation of the filter device is mostly directly driven by the motor during use. The motor drives the rotation of the filter device to generate centrifugal force to realize the filtration of sewage, and it is impossible to realize the flowing water flow during the process of conveying sewage to the inside of the filter device. The utilization of water energy is not conducive to saving electric energy, and the kinetic energy of the transported sewage has not been fully utilized. Therefore, we provide a water energy-driven centrifugal sewage filtration system and a sewage filtration method to solve the above-mentioned technical problems.

Contents of the invention

The purpose of the present invention is to provide a water energy-driven centrifugal sewage filtration system and its sewage filtration method, through concave drainage plate, annular water channel, vertical water delivery pipe, spiral water delivery channel, horizontal water delivery pipe, double filter mechanism, cleaning The specific design of the structure and the top sealing mechanism solves the technical problem that the existing centrifugal sewage filtering device cannot make full use of the water energy in the process of sewage transportation.

In order to solve the problems of the technologies described above, the present invention is achieved through the following technical solutions:

The present invention is a water-energy-driven centrifugal sewage filtration system, which includes a sewage treatment tank, a sewage input structure, an annular water channel and a double filter mechanism. The sewage treatment tank is internally connected and fixed with a coaxial concave drainage plate. The center position of the concave diversion plate is provided with a first axis hole; the sewage input structure is arranged inside the sewage treatment tank; the annular water channel is arranged in the wall of the sewage treatment tank, and the annular water channel and The sewage input structures are connected to each other; the double filter mechanism is arranged inside the sewage treatment tank, and the two are rotated and matched; the flowing water flow inside the annular waterway impacts the double filter mechanism to realize double filtration Centrifugal rotation of the mechanism.

The double filter mechanism includes a hemispherical sieve body and a sealing ring body, the center of the hemispherical sieve body is provided with a second axis hole; the sealing ring body is connected and fixed at the bottom of the hemispherical sieve body, and the The sealing ring body is arranged concentrically with the second axis hole, and the gap fits between the sealing ring body and the first axis hole; the sealing ring body is sleeved on the sewage input structure, so that The sewage in the annular waterway is transported to the hemispherical sieve body through the sewage input structure, the primary filtration of sewage is realized through the hemispherical sieve body, and the sewage after the primary filtration is realized secondary filtration of sewage through the sealing ring body.

As a preferred technical solution of the present invention, the bottom of the sewage treatment tank is provided with a support base, and an emptying water pump is installed on the support base, and the emptying water pump is used to discharge the purified water in the sewage treatment tank.

As a preferred technical solution of the present invention, the inner wall of the sewage treatment tank is provided with a coaxial annular slideway, and the annular slideway communicates with the annular waterway; the outer wall of the sewage treatment tank is provided with a A water inlet interface connected to an external pipeline, the water inlet interface communicates with the annular water channel, and the water inlet interface is arranged along the tangential direction of the annular water channel.

As a preferred technical solution of the present invention, the sewage input structure includes a longitudinal water delivery pipe installed at the bottom of the sewage treatment tank, and the upper port of the longitudinal water delivery pipe passes through the first axis hole and the second axis in sequence hole to the inside of the hemispherical sieve body; the spiral water delivery channel is set in the wall of the sewage treatment tank, and the upper port of the spiral water delivery channel is connected with the annular water channel; The horizontal water delivery pipe near the bottom of the sewage treatment tank, one end of the horizontal water delivery pipe communicates with the longitudinal water delivery pipe, and the other end of the horizontal water delivery pipe communicates with the lower port of the spiral water delivery channel.

As a preferred technical solution of the present invention, the inner wall of the concave drainage plate is connected and fixed with a cleaning structure, the cleaning structure includes a first scraper attached to the outer wall of the sealing ring, and the upper end of the first scraper is connected and fixed There is a second scraper attached to the outer wall of the hemispherical sieve.

As a preferred technical solution of the present invention, the bottom of the sealing ring body is provided with a water outlet chamber, and the outer surface of the sealing ring is provided with a secondary screen structure connected with the water outlet chamber; the filter holes on the hemispherical screen body And the filter holes on the secondary screen structure are arranged in a spiral direction.

As a preferred technical solution of the present invention, the double filter mechanism also includes a sealing ring and a connecting ring arranged concentrically, and the sealing ring is connected and fixed on the inner wall of the connecting ring; the outer surface of the sealing ring is connected to the connecting ring. The inner walls of the sewage treatment tank are fitted together, and the connecting ring is fit in the annular slideway; the outer wall of the connecting ring is evenly distributed with a plurality of impact plates, and the impact plates are slidingly fitted with the annular water channel; The hemispherical sieve body is connected to the sealing ring through a support rod, and the top of the hemispherical sieve body is provided with a coaxial annular notch.

As a preferred technical solution of the present invention, it also includes a top sealing mechanism, the top sealing mechanism includes a sealing disc and a hemispherical sealing body, and the sealing disc is connected to the thread groove on the top of the sewage treatment tank by fastening bolts ; The hemispherical sealing body is connected to the sealing disc through a fixed rod, and the bottom of the hemispherical sealing body is provided with an annular protrusion that is rotatably matched with the annular notch.

As a preferred technical solution of the present invention, the bottom of the sealing disc is fixed with a rotating shaft, and the lower end of the rotating shaft is fixed with an arc-shaped body coaxial with the hemispherical sealing body, and an arc-shaped body is arranged inside the arc-shaped body. In the storage chamber, the arc-shaped outer surface is provided with an arc-shaped scraper fitted on the inner wall of the hemispherical sieve.

The present invention has the following beneficial effects:

1. The present invention realizes the synchronous rotation of the hemispherical sieve body and the sealing ring body through the impact of the flowing water flow on the impact plate in the annular water channel. The sewage in the annular water channel flows into the hemispherical sieve body through the sewage input structure, and the hemispherical sieve body Under the centrifugal force generated by the rotation, the primary filtration of sewage is realized, and at the same time, the secondary filtration of sewage is realized under the centrifugal force generated by the rotation of the sealing ring, so that the dual filtration effect of sewage can be achieved only through the driving of water energy. The entire filtration process does not need to consume electric energy, which is conducive to saving Electric energy, effectively realizing the efficient utilization of water kinetic energy.

2. In the present invention, a spherical cavity is composed of a hemispherical sieve body and a hemispherical sealing body. The filter holes on the hemispherical sieve body are arranged in a spiral direction. During the rotation of the hemispherical sieve body, it is opposite to the sewage in the spherical cavity. At the same time, when the water pressure inside the spherical cavity increases due to continuous water inflow, the filtration efficiency of the hemispherical sieve body for sewage can be improved, which can effectively reduce the possibility of clogging of the filter holes on the hemispherical sieve body.

3. During the rotation process of the hemispherical sieve body in the present invention, the arc-shaped body inside the hemispherical sieve body moves relative to the hemispherical sieve body, and the hemispherical sieve The scraped dirt on the inner wall of the body enters into the arc-shaped storage chamber, so that the scraped dirt will not accumulate on the inner wall of the hemispherical sieve, ensuring that the inner wall of the hemispherical sieve is always in a state of no dirt accumulation, thus effectively ensuring Good filtration performance of hemispherical sieve body.

Of course, any product implementing the present invention does not necessarily need to achieve all the above-mentioned advantages at the same time.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that are required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is a structural schematic diagram of a water energy-driven centrifugal sewage filtration system.

FIG. 2 is a schematic diagram of the internal structure of FIG. 1 .

Fig. 3 is a structural schematic diagram of a sewage treatment tank.

FIG. 4 is a cross-sectional view of the longitudinal structure of FIG. 3 .

FIG. 5 is an enlarged view of the local structure at point A in FIG. 4 .

FIG. 6 is a front view of the structure in FIG. 4 .

Fig. 7 is a structural front view of the double filtering mechanism.

Fig. 8 is a structural top view of the double filtering mechanism.

Fig. 9 is a structural bottom view of the double filter mechanism.

FIG. 10 is a cross-sectional view of the structure of the sealing ring in FIG. 9 .

FIG. 11 is an enlarged view of the local structure at B in FIG. 10 .

Fig. 12 is a structural front view of the top sealing mechanism.

Fig. 13 is a structural side view of the top sealing mechanism.

Fig. 14 is a structural top view of the top sealing mechanism.

In the accompanying drawings, the list of parts represented by each label is as follows:

1-Sewage treatment tank, 101-Concave diversion plate, 102-First axis hole, 103-Ring water channel, 104-Support base, 105-Empty water pump, 106-Ring slideway, 107-Water inlet interface, 108 -longitudinal water delivery pipe, 109-spiral water delivery channel, 110-horizontal water delivery pipe, 111-thread groove, 2-double filter mechanism, 21-hemispherical sieve body, 22-second axis hole, 23-sealing ring body, 24-water outlet chamber, 25-secondary screen structure, 26-filter hole, 27-sealing ring, 28-connecting ring, 29-impact plate, 210-support rod, 211-ring notch, 3-cleaning structure, 301 -the first scraper, 302-the second scraper, 4-top sealing mechanism, 401-sealing disc, 402-fastening bolt, 403-hemispherical sealing body, 404-annular protrusion, 405-rotating shaft, 406-arc body , 407-arc storage cavity, 408-arc scraper, 5-controller.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one

Please refer to Figures 1-14, the present invention is a water energy driven centrifugal sewage filtration system, including a sewage treatment tank 1, a sewage input structure and a double filter mechanism 2, the sewage treatment tank 1 is connected and fixed with a coaxial concave Shaped diversion plate 101, the concave diversion plate 101 is similar to a pot-shaped structure, the center of the concave diversion plate 101 is provided with a first axis hole 102; the sewage input structure is arranged inside the sewage treatment tank 1; the annular water channel 103 is arranged in the sewage In the wall of the treatment tank 1, and the annular waterway 103 is connected with the sewage input structure, the sewage in the annular waterway 103 can flow into the sewage input structure; the double filter mechanism 2 is arranged inside the sewage treatment tank 1, and between the two Rotation fit, the rotation of the double filter mechanism 2 is driven by the water energy entering the sewage; the sewage entering the annular water channel 103 can continuously impact the double filter mechanism 2 in the process of circulating flow, and then convert the water energy into The rotational kinetic energy of the double filter mechanism 2.

The double filter mechanism 2 includes a hemispherical sieve body 21 and a sealing ring body 23. The primary filtration of sewage is realized through the hemispherical sieve body 21, and the secondary filtration of sewage is realized through the sealing ring body 23. The center of the hemispherical sieve body 21 is provided with a second Two axial center holes 22, the sewage input structure guides the sewage in the annular water channel 103 into the interior of the hemispherical sieve body 21 through the second axial center hole 22; the sealing ring body 23 is connected and fixed at the bottom of the hemispherical sieve body 21, and the sealing ring body 23 It is arranged concentrically with the second axis hole 22, and the gap fits between the sealing ring body 23 and the first axis hole 102. Through this structure setting, the sewage on the concave drainage plate 101 can only gather in the sealing ring body 23 peripheral side, and will not overflow to the bottom of the concave drainage plate 101 along the second axis hole 22;

The sealing ring body 23 is set on the sewage input structure, and the sewage in the annular water channel 103 is transported to the hemispherical sieve body 21 through the sewage input structure, and the primary filtration of the sewage is realized through the rotation of the hemispherical sieve body 21. It is thrown onto the inner wall of the concave drainage plate 101, and the secondary filtration of the sewage is realized by the rotation of the sealing ring body 23.

In the embodiment of the present invention, the bottom of the sewage treatment tank 1 is provided with a support base 104, the support base 104 is equipped with an emptying water pump 105, and the inner wall of the sewage treatment tank 1 is provided with a liquid level sensor near the concave drainage plate 101. When the liquid level sensor detects that the purified water accumulated in the sewage treatment tank 1 reaches the emptying depth, the liquid level sensor transmits this signal to the controller installed on the outer wall of the sewage treatment tank 1, and starts the emptying water pump 105 through the controller. The purified water in the sewage treatment tank 1 is discharged under the operation of the emptying water pump 105 .

In the embodiment of the present invention, the inner wall of the sewage treatment tank 1 is provided with a coaxial annular slideway 106, and the annular slideway 106 communicates with the annular water channel 103; The water interface 107, the water inlet interface 107 is connected with the annular waterway 103, and the water inlet interface 107 is arranged along the tangential direction of the annular waterway 103; the sewage to be treated is transported into the annular waterway 103 through an external pipeline, so that the sewage is discharged in the annular waterway. 103 internal circulation flow, and then impact the double filtering mechanism 2 to realize its rotation.

In an embodiment of the present invention, the sewage input structure includes:

The longitudinal water delivery pipe 108 installed at the bottom of the sewage treatment tank 1, the upper port of the longitudinal water delivery pipe 108 runs through the first axis hole 102 and the second axis hole 22 to the inside of the hemispherical sieve body 21, thereby realizing the hemispherical sieve body 21 Input of internal sewage.

Spiral water delivery channel 109, the spiral water delivery channel 109 is arranged in the wall of the sewage treatment tank 1, and the upper port of the spiral water delivery channel 109 is connected with the annular water channel 103, through this structure setting, the sewage in the annular water channel 103 can pass through The upper port of the spiral water delivery channel 109 flows into the spiral water delivery channel 109 .

The horizontal water delivery pipe 110 arranged near the bottom of the sewage treatment tank 1, one end of the horizontal water delivery pipe 110 communicates with the longitudinal water delivery pipe 108, and the other end of the horizontal water delivery pipe 110 communicates with the lower port of the spiral water delivery channel 109; , so that the sewage in the annular water channel 103 flows into the spiral water delivery channel 109 through the upper port of the spiral water delivery channel 109, then flows into the horizontal water delivery pipe 110 from the lower port of the spiral water delivery channel 109, and passes through the vertical water delivery pipe 108 Flow upwards to the inside of the hemispherical sieve body 21. When the interior of the hemispherical sieve body 21 is full of sewage, it can generate water pressure on the inner wall of the hemispherical sieve body 21, and then cooperate with the rotating centrifugal force of the hemispherical sieve body 21 to realize the hemispherical sieve body 21. Efficient filtration of sewage.

In the embodiment of the present invention, a cleaning structure 3 is connected and fixed on the inner wall of the concave diversion plate 101. The cleaning structure 3 includes a first scraper 301 attached to the outer wall of the sealing ring body 23. The upper end of the first scraper 301 is connected and fixed with a hemispherical The second scraper 302 attached to the outer wall of the sieve body 21; when the sewage flowing inside the annular water channel 103 impacts the double filter mechanism 2 and rotates, the hemispherical sieve body 21 and the sealing ring 23 rotate synchronously, so that the hemispherical sieve body 21 and the second The scraper 302 moves relative to each other, and the sealing ring body 23 and the first scraper 301 move relative to each other, so as to realize scraping off the dirt adhered to the outer surface of the hemispherical sieve body 21 and the sealing ring body 23 .

In the embodiment of the present invention, the bottom of the sealing ring body 23 is provided with a water outlet chamber 24, and the outer surface of the sealing ring body 23 is provided with a secondary screen structure 25 communicating with the water outlet chamber 24, and the sealing ring body 23 passes through the secondary screen structure. The mesh structure 25 realizes the re-filtering of sewage; the filter holes 26 on the hemispherical screen body 21 and the filter holes 26 on the secondary screen structure 25 are arranged in a spiral direction; through this structure setting, the hemispherical screen body 21 rotates During the process, it moves relative to the sewage, and at the same time, when the water pressure inside the hemispherical sieve body 21 increases due to continuous water inflow, the filtration efficiency of the hemispherical sieve body 21 for sewage can be improved, which can effectively reduce the amount of water on the hemispherical sieve body 21 Possibility of filter hole 26 clogging.

In the embodiment of the present invention, the double filter mechanism 2 also includes a sealing ring 27 and a connecting ring 28 arranged coaxially, and the sealing ring 27 is connected and fixed on the inner wall of the connecting ring 28; the outer surface of the sealing ring 27 is in contact with the inner wall of the sewage treatment tank 1 Fitting, the closure of the annular slideway 106 is realized through this structure, and the connecting ring 28 is clearance fit inside the annular slideway 106; a plurality of impact plates 29 are evenly distributed on the outer wall of the connecting ring 28, and the gap between the impact plate 29 and the annular water channel 103 Sliding fit; when the sewage flows along the inside of the annular waterway 103, the sewage will continue to push the impact plate 29 to move inside the annular waterway 103, thereby realizing the rotation of the double filter mechanism 2 inside the sewage treatment tank 1, so that the hemispherical sieve body 21 and The sealing ring body 23 rotates together.

The hemispherical sieve body 21 and the sealing ring 27 are connected by a support rod 210. The support rod 210 can adopt a structure that is easy to disassemble, so that the hemispherical sieve body 21 can be disassembled to meet the requirements for the accumulation on the inner wall of the concave drainage plate 101. For the cleaning of impurities, the top of the hemispherical sieve body 21 is provided with a coaxial annular notch 211 .

In the embodiment of the present invention, a top sealing mechanism 4 is also included, and the top sealing mechanism 4 includes a sealing disc 401 and a hemispherical sealing body 403, and the sealing disc 401 is connected to the threaded groove 111 on the top of the sewage treatment tank 1 by fastening bolts 402 , the sealing disc 401 is installed on the top of the sewage treatment tank 1 through this structural setting, thereby realizing the sealing of the sewage treatment tank 1 .

The hemispherical sealing body 403 and the sealing disc 401 are connected by a fixed rod, and the bottom of the hemispherical sealing body 403 is provided with an annular protrusion 404 that is rotatably matched with the annular notch 211. Through this structure, the hemispherical sieve body 21 can be guaranteed While rotating, the hemispherical sealing body 403 and the hemispherical sieve body 21 form a complete spherical cavity. During the rotation of the hemispherical sieve body 21, it moves relative to the sewage in the spherical cavity. When the internal water pressure increases, the filtering efficiency of the hemispherical sieve body 21 for sewage is improved.

In the embodiment of the present invention, the bottom of the sealing disk 401 is fixed with a rotating shaft 405, and the lower end of the rotating shaft 405 is fixed with an arc-shaped body 406 coaxial with the hemispherical sealing body 403, and an arc-shaped storage chamber 407 is arranged inside the arc-shaped body 406. It is used to store scraped dirt. The outer surface of the arc body 406 is provided with an arc scraper 408 that fits the inner wall of the hemispherical sieve body 21; The body 406 moves relative to the hemispherical sieve body 21, and the scraped dirt on the inner wall of the hemispherical sieve body 21 enters the arc-shaped storage chamber 407 under the scraping of the arc-shaped scraper 408 on the inner wall of the hemispherical sieve body 21 In this way, the scraped dirt will not accumulate on the inner wall of the hemispherical sieve body 21, ensuring that the inner wall of the hemispherical sieve body 21 is always in a state of no dirt accumulation, thereby effectively ensuring the good filtering performance of the hemispherical sieve body 21.

Embodiment two

A sewage filtering method for a water energy-driven centrifugal sewage filtration system, comprising the following steps:

S1. The external sewage flows into the annular water channel 103 through the water inlet interface 107, and the sewage circulating through the internal circulation of the annular water channel 103 impacts the impact plate 29 to realize the rotation of the double filter mechanism 2 inside the sewage treatment tank 1;

S2. During the centrifugal rotation of the double filter mechanism 2, the sewage inside the annular water channel 103 flows into the hemispherical sieve body 21 through the spiral water delivery channel 109, the horizontal water delivery pipe 110 and the vertical water delivery pipe 108 in sequence, and the hemispherical sieve body 21 Under the centrifugal force generated by the rotation, the sewage in the hemispherical sieve body 21 is thrown onto the concave drainage plate 101 to realize the primary filtration of sewage;

S3. The sewage thrown onto the concave diversion plate 101 is diverted to the surrounding of the sealing ring body 23 to realize the collection of sewage, and the secondary filtration of the sewage is realized under the action of the rotating sealing ring body 23, and the purification after the secondary filtration Water flows into the bottom of the sewage treatment tank 1 through the water outlet cavity 24;

S4. In the process of sewage filtration, relative movement occurs between the hemispherical sieve body 21 and the arc-shaped body 406, and the arc-shaped scraper 408 scrapes off the dirt on the inner wall of the hemispherical sieve body 21 and stores it in the arc-shaped storage chamber 407 At the same time, under the action of the cleaning structure 3, the dirt on the outer wall of the hemispherical sieve body 21 and the outer wall of the sealing ring body 23 can be scraped off; after the entire treatment equipment has been in operation for a period of time or after the filtration of batch sewage is completed, the top sealing mechanism 4 can be disassembled Go down to clean up the garbage inside the arc-shaped storage cavity 407, and clean up the impurities on the concave diversion plate 101 at the same time.

In the description of this specification, descriptions with reference to the terms "one embodiment", "example", "specific example" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment of the present invention. In an embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are only to help illustrate the invention. The preferred embodiments are not exhaustive in all detail, nor are the inventions limited to specific embodiments described. Obviously, many modifications and variations can be made based on the contents of this specification. This description selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. The invention is to be limited only by the claims, along with their full scope and equivalents.

Claims (10)

1. A water power driven centrifugal sewage filtration system comprising:

the sewage treatment device comprises a sewage treatment tank, a first shaft hole and a second shaft hole, wherein a coaxial concave drainage plate is fixedly connected inside the sewage treatment tank, and a first shaft hole is formed in the center of the concave drainage plate;

the sewage input structure is arranged inside the sewage treatment tank;

the annular water channel is arranged in the wall of the sewage treatment tank, and the annular water channel is communicated with the sewage input structure; and

the double-filtering mechanism is arranged inside the sewage treatment tank and is in running fit with the sewage treatment tank; the flowing water flow in the annular water channel impacts the double filtering mechanism to realize the centrifugal rotation of the double filtering mechanism;

the double filtration mechanism comprises:

the center of the hemispherical screen body is provided with a second axial hole; and

the sealing ring body is fixedly connected to the bottom of the hemispherical screen body, the sealing ring body and the second axial hole are coaxially arranged, and the sealing ring body is in clearance fit with the first axial hole;

the sealing ring body cover is established on the sewage input structure, sewage in the annular water channel passes through the sewage input structure and carries the hemisphere screen frame in, realizes sewage primary filter through the hemisphere screen frame, and sewage after primary filter realizes sewage secondary filter through the sealing ring body.

2. The water power driven centrifugal sewage filtration system of claim 1 wherein the sewage treatment tank is provided at a bottom thereof with a support base on which an evacuation water pump is mounted for discharging purified water from the sewage treatment tank.

3. The system of claim 1, wherein the inner wall of the wastewater treatment tank is provided with an annular concentric slideway, and the annular slideway is communicated with the annular water channel;

but be provided with the interface of intaking of external pipeline on the sewage treatment jar outer wall, the interface of intaking with be linked together between the annular water course, just the interface of intaking is followed annular water course tangential direction arranges.

4. The water power driving type centrifugal sewage filtration system as claimed in claim 1, wherein the sewage input structure comprises:

the upper end port of the longitudinal water delivery pipe sequentially penetrates through the first axial center hole and the second axial center hole to the inside of the hemispherical screen body;

the spiral water delivery channel is arranged in the wall of the sewage treatment tank, and the upper port of the spiral water delivery channel is communicated with the annular water channel; and

the sewage treatment device comprises a sewage treatment tank, a longitudinal water pipe, a transverse water pipe and a spiral water delivery channel, wherein the sewage treatment tank is arranged at the position close to the bottom of the sewage treatment tank, one end of the transverse water pipe is communicated with the longitudinal water pipe, and the other end of the transverse water pipe is communicated with the lower port of the spiral water delivery channel.

5. The water power driven centrifugal sewage filtering system as claimed in claim 1, wherein a cleaning structure is fixedly connected to the inner wall of the concave drainage plate, the cleaning structure comprises a first scraper attached to the outer wall of the sealing ring body, and a second scraper attached to the outer wall of the hemispherical screen body is fixedly connected to the upper end of the first scraper.

6. The water power driven centrifugal sewage filtration system of claim 1 wherein the bottom of the sealing ring body is provided with a water outlet cavity, and the outer surface of the sealing ring body is provided with a secondary screen structure communicated with the water outlet cavity; the filtering holes in the hemispherical screen body and the filtering holes in the secondary screen structure are all arranged in a spiral direction.

7. The water power driven type centrifugal sewage filtration system of claim 3 wherein the double filtration mechanism further comprises a sealing ring and a connection ring coaxially arranged, the sealing ring being fixedly connected to an inner wall of the connection ring;

the outer surface of the sealing ring is attached to the inner wall of the sewage treatment tank, and the connecting ring is in clearance fit with the inside of the annular slide way; a plurality of impact plates are uniformly distributed on the outer wall of the connecting ring, and the impact plates are in sliding fit with the annular water channel;

the hemisphere screen frame with connect through the bracing piece between the sealing ring, hemisphere screen frame top is provided with the annular notch with the axle center.

8. The system of claim 7, further comprising a closeout mechanism, the closeout mechanism comprising:

the sealing disc is connected with the thread groove on the top of the sewage treatment tank through a fastening bolt; and

the hemisphere seal, the hemisphere seal with connect through the dead lever between the sealed dish, hemisphere seal bottom be provided with annular notch normal running fit's annular protruding.

9. The hydraulic drive type centrifugal sewage filtering system as claimed in claim 8, wherein a rotating shaft is fixedly connected to the bottom of the sealing disc, an arc-shaped body coaxial with the hemispherical sealing body is fixed to the lower end of the rotating shaft, an arc-shaped storage cavity is arranged inside the arc-shaped body, and an arc-shaped scraper attached to the inner wall of the hemispherical screen body is arranged on the outer surface of the arc-shaped body.

10. A sewage filtering method of a hydraulic power driven centrifugal sewage filtering system is characterized by comprising the following steps:

s1, external sewage flows into an annular water channel through a water inlet connector, and the double-filtering mechanism rotates in a sewage treatment tank through a sewage impact plate circularly flowing in the annular water channel;

s2, sewage in the annular water channel sequentially flows into the hemispherical screen body through the spiral water conveying channel, the transverse water conveying pipe and the longitudinal water conveying pipe, and under the centrifugal force generated by rotation of the hemispherical screen body, the sewage in the hemispherical screen body is thrown onto the concave drainage plate, so that primary filtration of the sewage is realized;

s3, guiding the sewage thrown onto the concave drainage plate to the periphery of the sealing ring body to realize sewage collection, realizing secondary filtration of the sewage under the action of the rotating sealing ring body, and enabling the purified water after the secondary filtration to flow into the bottom of the sewage treatment tank through the water outlet cavity;

s4, in the sewage filtering process, relative motion occurs between the hemispherical screen body and the arc-shaped body, the arc-shaped scraper scrapes off and stores dirt on the inner wall of the hemispherical screen body in the arc-shaped storage cavity, and the dirt on the outer wall of the hemispherical screen body and the outer wall of the sealing ring body is scraped under the action of the cleaning structure.

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