Rapid settling and purifying device for sewage

Abstract

The invention relates to the technical field of sewage treatment, and discloses a rapid sewage settling and purifying device which comprises a settling mechanism and a filtering mechanism installed in the settling mechanism, the settling mechanism comprises a settling tank, the settling tank is at least provided with three bends, the upper end of the side wall of the settling tank is fixedly provided with a connecting retaining ring, and the connecting retaining ring is fixedly connected with the filtering mechanism. A fixed plate is also fixedly mounted on one side of the sedimentation tank; the filtering mechanism further comprises an outer frame fixedly installed in the sedimentation tank, a coarse gravel filtering layer, a medium gravel filtering layer and a fine gravel filtering layer are sequentially installed on the outer frame, sewage and sediment can be conveniently separated and collected, gravel is prevented from being blocked in the sedimentation tank for a long time, the sewage sedimentation and purification efficiency is further improved, and the service life of the sedimentation tank is prolonged. By applying the device, natural sedimentation and purification of sewage are realized, the sewage is prevented from entering a drainage system from the source, settled sludge is cleaned and dug in a centralized manner, and cleaning and digging time and labor of ditches along the way are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a sewage rapid sedimentation purification device. Background Art

[0002] Sewage treatment is the process of purifying sewage to meet the water quality requirements for discharge into a water body or reuse. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical care, and catering, and is increasingly entering the daily lives of ordinary people. When the existing sedimentation tank precipitates sewage, the suspended matter settles to the bottom of the tank.

[0003] For example, a rapid sedimentation sewage purification device with announcement number CN217119440U relates to the field of sewage treatment, and includes an upper sewage pool and a lower sedimentation tank and a guide assembly located therebetween. The sewage pool is provided with a central cylinder for limiting the direction of water inlet flow. Under the blocking effect of the guide plate, the water flow direction can be limited to a certain extent to prevent the irregular flow of water from stirring up the suspended matter in the sewage pool; the rotating shaft drives a group of guide plates to rotate slowly in the sedimentation tank, which can loosen the sludge blocking the sedimentation tank to a certain extent and further accelerate the discharge of the sludge. In addition, the sludge brush at the end of the guide plate can clean part of the sludge on the side wall of the sedimentation tank to effectively prevent blockage.

[0004] During underground construction, sewage flows naturally and has a short sedimentation time. At the end of the sedimentation tank, some sand and gravel are easily carried out by the flowing sewage, affecting subsequent purification use. If the settled sand and gravel are not cleaned for a long time, it is easy to cause siltation in ditches and drainage pipes, thereby paralyzing the drainage system and causing accidents of flooding in low-lying areas.

[0005] Therefore, we proposed a sewage rapid sedimentation purification device to solve the above-mentioned problems. Summary of the invention

[0006] The purpose of the present invention is to provide a sewage rapid sedimentation purification device, which utilizes the principles of reducing sewage flow rate, increasing water flow resistance, and prolonging sedimentation time to purify sewage for a long time and fully settle it, thereby effectively solving the problems of ditch clogging and drainage pipe blockage.

[0007] To achieve the above object, the present invention provides the following technical solution: a sewage rapid sedimentation purification device, comprising a sedimentation mechanism and a filtering mechanism installed inside the sedimentation mechanism, the sedimentation mechanism comprising a sedimentation tank, at least three bends are arranged on the sedimentation tank, a connecting buckle is fixedly installed on the upper end of the side wall of the sedimentation tank, and a fixing plate is also fixedly installed on one side of the sedimentation tank; The filtering mechanism also includes an outer frame fixedly installed inside the sedimentation tank, on which a coarse sand and gravel filter layer, a medium sand and gravel filter layer, and a fine sand and gravel filter layer are sequentially installed, and sewage passes through the coarse sand and gravel filter layer, the medium sand and gravel filter layer, and the fine sand and gravel filter layer in sequence; A deceleration mechanism is also provided at the upper end of the sedimentation mechanism, and the deceleration mechanism includes a plurality of central shafts rotatably connected to the connecting buckles and a pulley fixedly mounted on the outer periphery of the central shaft, a belt body is rotatably mounted on the pulley, an arc-shaped scraper is fixedly mounted on the belt body, and the inclination direction of the arc-shaped scraper is opposite to the direction of water flow.

[0008] Preferably, at least two deceleration mechanisms are provided on the sedimentation mechanism, a limiting ring is fixedly installed on the outer periphery of the central axis, the limiting ring is arranged on one side of the connecting buckle, a first sedimentation hole is opened on the belt body, and baffles are fixedly installed on both ends of the arc scraper.

[0009] Preferably, the baffle is also fixedly connected to the belt body, and a second settlement hole is provided on the arc-shaped scraper, and the diameter of the second settlement hole is smaller than the diameter of the first settlement hole.

[0010] Preferably, a protective mechanism is provided inside the deceleration mechanism, and the protective mechanism includes protective plates rotatably installed at both ends of the central axis respectively, and the protective plates are also provided inside the belt body, and a limiting arc plate is also provided between the two protective plates, and limiting inclined plates are fixedly installed at both ends of the limiting arc plate, and connecting blocks are fixedly installed at both ends of the limiting inclined plate, and the connecting blocks are fixedly connected to the inner walls of the protective plates.

[0011] Preferably, the outer periphery of the limiting arc plate is adapted to the pulley, an avoidance hole is provided between the protective plate, the limiting arc plate and the connecting block, the avoidance hole is adapted to the pulley, and a through hole is provided on one side of the protective plate.

[0012] Preferably, a discharging mechanism is provided at the upper end of the protective mechanism, and the discharging mechanism includes a discharging plate arranged between the two limiting inclined plates, and an extension plate is fixedly installed at one end of the discharging plate, and the extension plate is adapted to the through hole, and the heights of the middle parts of the discharging plate and the extension plate are lower than the heights of the two sides.

[0013] Preferably, a driving mechanism is provided on one side of the sinking mechanism, and the driving mechanism includes a motor fixedly mounted on the upper end of the fixed plate and a first bevel gear fixedly mounted on the output end of the motor, second bevel gears are meshingly mounted on both sides of the upper end of the first bevel gear, and the two second bevel gears are respectively fixedly connected to the two relative central shafts.

[0014] Preferably, a buffer mechanism is also provided inside the sedimentation mechanism, and the buffer mechanism includes a buffer plate rotatably installed at the bottom of the sedimentation tank, and the buffer plate is also arranged at the lower end of the arc scraper, and a bellows is commonly provided between the buffer plate and the sedimentation tank, and an air pipe is installed at the lower end of the bellows, and the air pipe is interlaced and connected with the bottom of the sedimentation tank.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The sedimentation tank and the bend are combined into an S-shaped sedimentation channel. Sewage is injected from one end of the sedimentation tank. Sand, impurities, etc. in the sewage are precipitated at the bottom of the sedimentation tank. The driving center shaft, pulley, belt body, and arc scraper rotate in the sedimentation tank in the direction of water injection, so that the sewage is pushed back, which increases the time the sewage stays in the sedimentation tank, further increases the resistance of the sewage, and facilitates the speed reduction and purification of sand and gravel. After the sewage is filtered, it passes through the coarse sand and gravel filter layer, the medium sand and gravel filter layer, and the fine sand and gravel filter layer in turn, increasing the resistance of the sewage for speed reduction and purification, which is convenient for the sewage to be sedimented and filtered step by step. The device is convenient for the separate collection of sewage and sediment, prevents sand and gravel from being blocked in the sedimentation tank for a long time, and further improves the efficiency of sewage sedimentation and purification. The application of this device realizes the natural sedimentation and purification of sewage, eliminates the sewage from entering the drainage system at the root, and realizes centralized excavation of the settled sludge, reducing the excavation time and labor of the ditches along the way.

[0016] 2. The sand and gravel precipitated in the sewage are scraped away and collected by the arc scraper. The baffles on both sides can protect the sand and gravel to prevent them from sliding down from the two sides of the arc scraper. When the arc scraper rotates to the side of the belt body and is higher than the sewage surface, the sewage can be filtered out from the second sedimentation hole, ensuring that the water content of the sand and gravel is small when they are taken out. When the arc scraper rotates to the upper end of the belt body, the sand and gravel fall naturally from the arc scraper, and can fall on the belt body and fall through the first sedimentation hole on the belt body, which is convenient for centralized collection, secondary scraping of the arc scraper, and reuse.

[0017] 3. By setting a limiting arc plate, when sand and gravel pass through the upper end of the limiting arc plate, most of the sand and gravel will settle at the bottom of the limiting arc plate with natural sedimentation. When sand and gravel pass through the lower end of the limiting arc plate, the sand and gravel will be scraped away by the arc scraper, and further driven to the upper end of the limiting arc plate, which can block most of the sewage and sand and gravel, and facilitate the subsequent secondary purification of sewage.

[0018] 4. There is a certain gap between the upper end of the limiting arc plate and the top of the belt body. When sand and gravel enter from the upper end of the limiting arc plate, they will fall on the limiting inclined plate and slide down along the inclined surface of the limiting inclined plate, and finally slide down from the discharge plate, ensuring that the sand and gravel can be automatically brought out of the sedimentation tank, further realizing the separation of sewage and sand and gravel, reducing the sludge from entering the ditch and drain pipe, and realizing full and effective sedimentation and purification of sewage.

[0019] 5. The two deceleration mechanisms are respectively arranged on both sides of the curve. With the cooperation of the first bevel gear and the two second bevel gears, the device is suitable for bidirectional rotation and can share a driving part, with good use effect.

[0020] 6. When the belt body rotates, the arc scraper is compressed from the upper end of the buffer plate and the bellows. When the arc scraper slides over the buffer plate, it can take away the sand and gravel at the bottom of the buffer plate. The buffer plate loses its restraint and is reset under the action of the bellows and the air pipe, and is used to block the sand and gravel again. Together with the three-time sand and gravel filtration at the tail of the sedimentation tank, the purification effect is guaranteed to a great extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a structural schematic diagram of the sedimentation mechanism of the present invention; Figure 3 It is a schematic diagram of the structure of the deceleration mechanism and the protection mechanism of the present invention; Figure 4 It is a schematic diagram of the structure of the deceleration mechanism of the present invention; Figure 5 It is a schematic diagram of the structure of the protection mechanism of the present invention; Figure 6 It is a schematic diagram of the driving mechanism structure of the present invention; Figure 7 It is an overall cross-sectional view of the present invention; Figure 8 It is a schematic diagram of the structure of the buffer mechanism of the present invention.

[0022] In the figure: 1. sedimentation mechanism; 11. sedimentation tank; 12. bend; 13. connecting buckle; 14. fixing plate; 2. filtering mechanism; 21. outer frame; 22. coarse sand and gravel filtering layer; 23. medium sand and gravel filtering layer; 24. fine sand and gravel filtering layer; 3. retarding mechanism; 31. middle shaft; 32. limit ring; 33. pulley; 34. belt body; 35. first sedimentation hole; 36. arc scraper; 37. baffle; 38. Second sedimentation hole; 4. Protection mechanism; 41. Protection plate; 42. Limiting arc plate; 43. Limiting inclined plate; 44. Connecting block; 45. Avoidance hole; 46. Through hole; 5. Discharging mechanism; 51. Discharging plate; 52. Extension plate; 6. Driving mechanism; 61. Motor; 62. First bevel gear; 63. Second bevel gear; 7. Buffer mechanism; 71. Buffer plate; 72. Bellows; 73. Air pipe. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1: Please refer to Figure 1 - Figure 4 A sewage rapid sedimentation purification device includes a sedimentation mechanism 1 and a filtering mechanism 2 installed inside the sedimentation mechanism 1. The sedimentation mechanism 1 includes a sedimentation tank 11. At least three bends 12 are arranged on the sedimentation tank 11. The sedimentation tank 11 and the bends 12 are combined into an S-shaped sedimentation channel, which increases the sedimentation time and facilitates sufficient sedimentation.

[0025] A connecting buckle 13 is fixedly mounted on the upper end of the side wall of the sedimentation tank 11 , and a fixing plate 14 is also fixedly mounted on one side of the sedimentation tank 11 .

[0026] The filtering mechanism 2 also includes an outer frame 21 fixedly installed inside the sedimentation tank 11. The outer frame 21 is arranged at the end of the sedimentation tank 11. A coarse sand and gravel filter layer 22, a medium sand and gravel filter layer 23, and a fine sand and gravel filter layer 24 are sequentially installed on the outer frame 21. The sewage passes through the coarse sand and gravel filter layer 22, the medium sand and gravel filter layer 23, and the fine sand and gravel filter layer 24 in turn, increasing the resistance of the sewage to reduce the speed and purify it, so as to facilitate the step-by-step sedimentation, filtration and purification of the sewage.

[0027] A deceleration mechanism 3 is also provided at the upper end of the sedimentation mechanism 1. The deceleration mechanism 3 includes a plurality of central shafts 31 rotatably connected to the connecting buckle 13 and a pulley 33 fixedly mounted on the outer periphery of the central shaft 31. A belt body 34 is rotatably mounted on the pulley 33. Both central shafts 31 are rotatably mounted on the connecting buckle 13, thereby ensuring the rotation stability of the pulley 33 and the belt body 34. A driving member is connected to one end of the central shaft 31. After the driving member is turned on, the central shaft 31, the pulley 33, and the belt body 34 rotate in the sedimentation tank 11, and the rotation direction is opposite to the water flow direction. An arc scraper 36 is fixedly mounted on the belt body 34, and the inclination direction of the arc scraper 36 is also opposite to the water flow direction. The lowermost end of the arc scraper 36 fits the bottom of the sedimentation tank 11.

[0028] The deceleration mechanism 3 is arranged at the water inlet end of the sedimentation tank 11. The width of the belt body 34 and the arc scraper 36 is consistent with the internal width of the sedimentation tank 11, which increases the resistance to the flow of sewage in the sedimentation tank 11 and reduces the sewage flow rate. Most of the sand and gravel can also be blocked at the belt body 34, which is convenient for the centralized collection of sand and gravel.

[0029] The settling tank 11 and the bend 12 are combined into an S-shaped sedimentation channel. Sewage is injected from one end of the settling tank 11. Sand, gravel, impurities, etc. in the sewage are precipitated at the bottom of the settling tank 11. The driving shaft 31, the pulley 33, the belt body 34, and the arc scraper 36 rotate in the settling tank 11 in the direction of water injection, so that the sewage is pushed back, which increases the time the sewage stays in the settling tank 11, further increases the resistance of the sewage, and facilitates the speed reduction and purification of sand and gravel.

[0030] During the rotation of the arc scraper 36, the bottom of the arc scraper 36 scrapes forward along the bottom of the sedimentation tank 11, so that the sand and gravel at the bottom can be transported forward and collected together. When the arc scraper 36 at the bottom rotates to the side of the belt body 34 and is higher than the water surface, the sewage in the arc scraper 36 can flow back into the sedimentation tank 11 to facilitate the separation of sand and gravel and sludge. When the arc scraper 36 rotates to the top of the belt body 34, the filtered sand and gravel can be poured out to facilitate the separate collection of sewage and sediment, prevent sand and gravel from being blocked in the sedimentation tank 11 for a long time, and further improve the efficiency of sewage sedimentation and purification.

[0031] The application of this device realizes the natural sedimentation and purification of sewage, eliminates the sewage from entering the drainage system at its source, and the settled sludge is centrally dredged, reducing the time and labor for dredging ditches along the way.

[0032] Example 2: Please refer to Figure 1-Figure 5 and Figure 7At least two deceleration mechanisms 3 are arranged on the sedimentation mechanism 1. A limit ring 32 is fixedly installed on the outer periphery of the central axis 31. The limit ring 32 is arranged on one side of the connecting buckle 13 to fix the position of the central axis 31. A first sedimentation hole 35 is opened on the belt body 34 to ensure that sewage can pass through the belt body 34. Baffles 37 are fixedly installed at both ends of the arc scraper 36. The baffle 37 is connected to the inner wall of the sedimentation tank 11. The sand and gravel precipitated in the sewage are scraped away and collected by the arc scraper 36. The baffles 37 on both sides can protect the sand and gravel to prevent the sand and gravel from sliding from both sides of the arc scraper 36.

[0033] The baffle 37 is also fixedly connected to the belt body 34. A second sedimentation hole 38 is provided on the arc scraper 36. The second sedimentation hole 38 is provided on the arc scraper 36, which does not affect the passage of sewage. When the arc scraper 36 rotates to the side of the belt body 34 and is higher than the sewage surface, the sewage can be filtered out from the second sedimentation hole 38, ensuring that the water content of sand and gravel when being taken out is low. The diameter of the second sedimentation hole 38 is smaller than the diameter of the first sedimentation hole 35. When the arc scraper 36 rotates to the upper end of the belt body 34, sand and gravel naturally fall from the arc scraper 36, may fall on the belt body 34, and fall through the first sedimentation hole 35 on the belt body 34, which is convenient for centralized collection, secondary scraping of the arc scraper 36, and reuse.

[0034] Example 3: Please refer to Figure 2-Figure 7 A protective mechanism 4 is arranged inside the deceleration mechanism 3. The protective mechanism 4 includes protective plates 41 rotatably mounted at both ends of the central axis 31. The protective plates 41 are also arranged inside the belt body 34. The protective plates 41 support the belt body 34, ensuring that the belt body 34 is not easily deformed. A limited arc plate 42 is also arranged between the two protective plates 41.

[0035] The position of the retarding mechanism 3 is adaptively installed according to the depth of the sedimentation tank 11 to ensure that the uppermost end of the retarding mechanism 3 is above the water surface. The sewage is injected into the sedimentation tank 11. The limiting arc plate 42 is a C-shaped structure, which is arranged between the multiple pulley 33 bodies and fits the inner wall of the belt body 34. The limiting arc plate 42 is also arranged at the lower end and both sides of the belt body 34, which can block the first sedimentation holes 35 on both sides and the bottom of the belt body 34. Sand and gravel will not pass through the limiting arc plate 42, and the limiting arc plate 42 with an arc structure on the front and rear sides is arranged in the direction of sewage inlet.

[0036] When the sewage depth is higher than the limiting arc plate 42, when the sewage flows to the limiting arc plate 42, the sand and gravel either pass through the upper end of the limiting arc plate 42 or pass through the lower end of the limiting arc plate 42. When the sand and gravel pass through the upper end of the limiting arc plate 42, most of the sand and gravel will settle at the bottom inside the limiting arc plate 42 with natural sedimentation. When the sand and gravel pass through the lower end of the limiting arc plate 42, the sand and gravel will be scraped away by the arc scraper 36, and the sand and gravel will be further driven to the upper end of the limiting arc plate 42. Under the action of the limiting arc plate 42, most of the sewage and sand and gravel can be blocked, which is convenient for the subsequent secondary purification of sewage.

[0037] The limiting arc plate 42 has limiting inclined plates 43 fixedly mounted at both ends. The limiting inclined plates 43 have connecting blocks 44 fixedly mounted at both ends. The connecting blocks 44 are fixedly connected to the inner wall of the protective plate 41 for fixing the limiting arc plate 42 and the limiting inclined plates 43 .

[0038] There is a certain gap between the uppermost end of the limiting arc plate 42 and the top of the belt body 34. The sand and gravel scraped up by the arc scraper 36 will eventually fall on the belt body 34 and fall on the limiting inclined plate 43 through the first sedimentation hole 35 of the belt body 34. When the sand and gravel enter from the upper end of the limiting arc plate 42, they will fall on the limiting inclined plate 43 in a concentrated manner and slide down along the inclined surface of the limiting inclined plate 43, which is convenient for centralized collection and will not re-enter the sedimentation tank 11 from the other end of the belt body 34.

[0039] The outer periphery of the limiting arc plate 42 is matched with the pulley 33, and an avoidance hole 45 is commonly opened between the protective plate 41, the limiting arc plate 42 and the connecting block 44. The avoidance hole 45 is matched with the pulley 33, ensuring that the pulley 33 can drive the belt body 34 to rotate without conflicting with the blocking effect of the limiting arc plate 42 and the limiting inclined plate 43.

[0040] A through hole 46 is provided on one side of the protective plate 41, and a discharging mechanism 5 is provided on the upper end of the protective mechanism 4. The discharging mechanism 5 includes a discharging plate 51 arranged between two limiting inclined plates 43, and an extension plate 52 is fixedly installed on one end of the discharging plate 51. The extension plate 52 is adapted to the through hole 46, and the heights of the middle parts of the discharging plate 51 and the extension plate 52 are lower than the heights of the two sides.

[0041] The sand and gravel falling on the limiting inclined plate 43 can fall naturally along the inclined surface and finally gather on the discharge plate 51. Since the height of the extension plate 52 is lower than the discharge plate 51, the sand and gravel can slide down from the discharge plate 51, ensuring that the sand and gravel can be automatically brought out of the sedimentation tank 11, further realizing the separation of sewage and sand and gravel, reducing the sludge from entering the ditch and drain pipe, and realizing the full and effective sedimentation and purification of sewage.

[0042] Example 4: Please refer to Figure 2-Figure 8A driving mechanism 6 is provided on one side of the sedimentation mechanism 1, and the driving mechanism 6 includes a motor 61 fixedly installed on the upper end of the fixed plate 14 and a first bevel gear 62 fixedly installed on the output end of the motor 61, and second bevel gears 63 are meshedly installed on both sides of the upper end of the first bevel gear 62, and the two second bevel gears 63 are respectively fixedly connected to the two relative central shafts 31.

[0043] The motor 61 is fixedly mounted on the fixed plate 14. After the motor 61 is turned on, the first bevel gear 62 and the two second bevel gears 63 rotate in sequence, which can drive the corresponding two middle shafts 31 to rotate. Since the deceleration mechanism 3 is blocked by a curve 12, the two belt bodies 34 rotate in opposite directions. With the cooperation of the first bevel gear 62 and the two second bevel gears 63, the device is suitable for bidirectional rotation and can share a driving component, with good use effect.

[0044] A buffer mechanism 7 is also provided inside the sedimentation mechanism 1. The buffer mechanism 7 includes a buffer plate 71 rotatably installed at the bottom of the sedimentation tank 11. The buffer plate 71 is also provided at the lower end of the arc scraper 36. A bellows 72 is provided between the buffer plate 71 and the sedimentation tank 11. An air pipe 73 is installed at the lower end of the bellows 72. The air pipe 73 is interlaced and connected with the bottom of the sedimentation tank 11. The bellows 72 is a hollow triangular structure, one side of which is a deformable bending plate.

[0045] The buffer plate 71 is inclined and is also arranged on one side of the belt body 34. Its high point is arranged in the direction of sewage flow. During the flow of sewage, the bottom of the buffer plate 71 can block some sand and stones from continuing to flow forward, which has the effect of water blocking and sedimentation.

[0046] When the belt body 34 rotates, the arc scraper 36 is compressed from the upper end of the buffer plate 71, compressing the bellows 72. The hollow structure is connected to the outside of the device through the air pipe 73. The internal gas can be discharged to the outside from the air pipe 73. When the arc scraper 36 slides over the buffer plate 71, it can take away the sand and gravel at the bottom of the buffer plate 71. The buffer plate 71 loses its restraint and is reset under the action of the bellows 72 and the air pipe 73, and is used to block the sand and gravel again.

[0047] Finally, they are uniformly taken out of the device by the discharge plate 51. The device is provided with at least two retarding mechanisms 3, which can take away the sand and gravel in the sewage in layers, and cooperate with the three-time sand and gravel filtration at the tail of the sedimentation tank 11, which guarantees the purification effect to a great extent.

[0048] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0049] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewage rapid sedimentation purification device, comprising a sedimentation mechanism (1) and a filtering mechanism (2) installed inside the sedimentation mechanism (1), characterized in that: The sedimentation mechanism (1) comprises a sedimentation tank (11), the sedimentation tank (11) being provided with at least three bends (12), a connecting buckle (13) being fixedly mounted on the upper end of the side wall of the sedimentation tank (11), and a fixing plate (14) being fixedly mounted on one side of the sedimentation tank (11); The filtering mechanism (2) further comprises an outer frame (21) fixedly mounted inside the sedimentation tank (11), wherein a coarse sand and gravel filter layer (22), a medium sand and gravel filter layer (23), and a fine sand and gravel filter layer (24) are sequentially mounted on the outer frame (21), and sewage passes through the coarse sand and gravel filter layer (22), the medium sand and gravel filter layer (23), and the fine sand and gravel filter layer (24) in sequence; A deceleration mechanism (3) is also provided at the upper end of the sedimentation mechanism (1), the deceleration mechanism (3) comprising a plurality of central shafts (31) rotatably connected to the connecting buckle (13) and a belt pulley (33) fixedly mounted on the outer periphery of the central shaft (31), a belt body (34) rotatably mounted on the belt pulley (33), an arc-shaped scraper (36) fixedly mounted on the belt body (34), and an inclination direction of the arc-shaped scraper (36) being opposite to the direction of the water flow.

2. A sewage rapid sedimentation purification device according to claim 1, characterized in that: At least two deceleration mechanisms (3) are arranged on the sedimentation mechanism (1); a limit ring (32) is fixedly mounted on the outer periphery of the central shaft (31); the limit ring (32) is arranged on one side of the connecting buckle (13); a first sedimentation hole (35) is opened on the belt body (34); and baffles (37) are fixedly mounted on both ends of the arc-shaped scraper (36).

3. A sewage rapid sedimentation purification device according to claim 2, characterized in that: The baffle (37) is also fixedly connected to the belt body (34); a second sedimentation hole (38) is provided on the arc-shaped scraper (36); the diameter of the second sedimentation hole (38) is smaller than the diameter of the first sedimentation hole (35).

4. A sewage rapid sedimentation purification device according to claim 3, characterized in that: A protection mechanism (4) is arranged inside the deceleration mechanism (3), and the protection mechanism (4) comprises protection plates (41) rotatably mounted on both ends of the central shaft (31), and the protection plates (41) are also arranged inside the belt body (33).

5. A sewage rapid sedimentation purification device according to claim 4, characterized in that: A limiting arc plate (42) is also provided between the two protection plates (41), and limiting inclined plates (43) are fixedly mounted on both ends of the limiting arc plate (42), and connecting blocks (44) are fixedly mounted on both ends of the limiting inclined plates (43), and the connecting blocks (44) are fixedly connected to the inner walls of the protection plates (41).

6. A sewage rapid sedimentation purification device according to claim 5, characterized in that: The outer periphery of the limiting arc plate (42) is matched with the belt pulley (33); a avoidance hole (45) is provided between the protective plate (41), the limiting arc plate (42) and the connecting block (44); the avoidance hole (45) is matched with the belt pulley (33); and a through hole (46) is provided on one side of the protective plate (41).

7. A sewage rapid sedimentation purification device according to claim 6, characterized in that: A discharge mechanism (5) is arranged at the upper end of the protection mechanism (4), and the discharge mechanism (5) comprises a discharge plate (51) arranged between the two limit inclined plates (43), an extension plate (52) is fixedly mounted on one end of the discharge plate (51), the extension plate (52) is adapted to the through hole (46), and the heights of the middle parts of the discharge plate (51) and the extension plate (52) are both lower than the heights of the two sides.

8. A sewage rapid sedimentation purification device according to claim 2, characterized in that: A driving mechanism (6) is provided on one side of the sinking mechanism (1), the driving mechanism (6) comprising a motor (61) fixedly mounted on the upper end of the fixing plate (14) and a first bevel gear (62) fixedly mounted on the output end of the motor (61), second bevel gears (63) being meshedly mounted on both sides of the upper end of the first bevel gear (62), and two second bevel gears (63) being fixedly connected to two opposite central shafts (31) respectively.

9. A sewage rapid sedimentation purification device according to claim 1, characterized in that: A buffer mechanism (7) is also provided inside the sedimentation mechanism (1), and the buffer mechanism (7) comprises a buffer plate (71) rotatably mounted on the bottom of the sedimentation tank (11), and the buffer plate (71) is also provided at the lower end of the arc-shaped scraper (36).

10. A sewage rapid sedimentation purification device according to claim 9, characterized in that: A bellows (72) is provided between the buffer plate (71) and the sedimentation tank (11), and an air pipe (73) is installed at the lower end of the bellows (72), and the air pipe (73) is connected to the bottom of the sedimentation tank (11).

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