An urban sewage filtration and purification device

Abstract

The present invention discloses an urban sewage filtration and purification device, which mainly relates to the technical field of sewage treatment. It includes a first outlet connecting the first mixing chamber and the first sedimentation chamber. A second outlet connecting the second mixing chamber and the second sedimentation chamber is provided on the third partition plate. A first spiral plate and a second spiral plate are respectively arranged in the first mixing chamber and the second mixing chamber. L-shaped blocks are respectively arranged at the first outlet and the second outlet. First overflow ports and second overflow ports are respectively formed between the L-shaped blocks and the second partition plate and the third partition plate. The first overflow ports and the second overflow ports are respectively communicated with the first outlet and the second outlet. Recovery boxes are arranged at the bottoms of the first sedimentation chamber and the second sedimentation chamber. An overflow chamber is arranged at the top of the tank body. The beneficial effect of the present invention is as follows: When solving the problem that large particle impurities are likely to block the filter holes when colloids and fine suspended matters in the filtered water agglomerate into large particle impurities, the efficiency of filtering large particle impurities in sewage is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and specifically relates to an urban sewage filtration and purification device. Background Art

[0002] Urban sewage mainly includes domestic sewage, industrial sewage and runoff sewage. With the progress of technology and the rapid development of industry, the sewage generated is also increasing continuously. Cities are places with dense population, and urban sewage contains a large number of germs. If the sewage is not treated in a planned and effective manner, it will cause great pollution to the environment and affect the physical health of residents at the same time.

[0003] Existing urban sewage treatment equipment generally adds a flocculant to the sewage to make the colloids and fine suspended solids in the water coagulate into large particle impurities, and then removes them through precipitation in combination with a filter screen. However, when using the filter screen to filter the coagulated large particle impurities, the large particles will block the filter holes of the filter screen, affecting the efficiency of filtering impurities in the water. Summary of the Invention

[0004] The purpose of the present invention is to provide an urban sewage filtration and purification device to solve the problem that large particle impurities are easily blocked in the filter holes when filtering colloids and fine suspended solids in the water, and improve the efficiency of filtering large particle impurities in the sewage.

[0005] To achieve the above object, the invention is realized through the following technical solutions:

[0006] An urban sewage filtration and purification device includes a tank body, as well as an inlet and an outlet provided at the bottom and top of the tank body respectively. A first partition, a second partition and a third partition are provided inside the tank body. The first partition divides the tank body into a first filtration area and a second filtration area. The second partition divides the first filtration area into a first mixing chamber and a first precipitation chamber. The third partition divides the second filtration area into a second mixing chamber and a second precipitation chamber. Flocculant feeding pipes are provided at the bottoms of the first mixing chamber and the second mixing chamber.

[0007] A first outlet communicating the first mixing chamber and the first precipitation chamber is provided on the second partition. A second outlet communicating the second mixing chamber and the second precipitation chamber is provided on the third partition. First spiral plates and second spiral plates used in cooperation with the first outlet and the second outlet are respectively provided in the first mixing chamber and the second mixing chamber. L-shaped blocks are respectively provided at the first outlet and the second outlet. First overflow ports and second overflow ports are respectively formed between the L-shaped blocks and the second partition and the third partition. The first overflow ports and the second overflow ports are respectively communicated with the first outlet and the second outlet. Recovery boxes are provided at the bottoms of the first precipitation chamber and the second precipitation chamber.

[0008] A through hole communicating with the first sedimentation chamber and the second mixing chamber is provided at the bottom of the first partition plate. An overflow chamber communicating with the water outlet is provided at the top of the tank body, and a first through hole, a second through hole, and a third through hole communicating the overflow chamber with the first mixing chamber, the overflow chamber with the second mixing chamber, and the overflow chamber with the second sedimentation chamber are provided.

[0009] Further, the L-shaped block includes a horizontal plate and a swing plate rotatably provided on the horizontal plate. A first baffle and a second baffle are respectively slidably connected to the second partition plate and the third partition plate. A fourth through hole and a fifth through hole are respectively provided on the first baffle and the second baffle. The first outlet communicates with the fourth through hole, and the second outlet and the fifth through hole communicate with each other to form a first filter hole and a second filter hole.

[0010] Further, a plurality of first driving rods and second driving rods are slidably connected to the tank body. The ends of the first driving rods and the second driving rods are respectively rotatably connected to a first connecting rod and a second connecting rod. The ends of the first connecting rod and the second connecting rod are respectively rotatably connected to the first baffle and the second baffle. Third connecting rods are rotatably connected to both the first baffle and the second baffle. The third connecting rods are respectively rotatably connected to the swing plate.

[0011] Further, a plurality of convex rings are provided at the top end of the tank body. A tapered ring is slidably connected to the convex rings. Sealing strips are provided between the tapered ring and the first driving rods and the second driving rods. A fixing block is threadedly connected to the convex rings. A tapered surface contacting the tapered ring is provided at the end of the fixing block.

[0012] Further, a first gear and a second gear are respectively provided on the fixing blocks on the first driving rods and the second driving rods. A plurality of rotating shafts are provided on the tank body. A first turntable is threadedly connected to one of the rotating shafts, and second turntables are respectively threadedly connected to the remaining rotating shafts. A third gear meshing with a plurality of first gears simultaneously is provided on the first turntable. A fourth gear meshing with the adjacent first gear and second gear simultaneously is provided on the second turntable. The pitches provided on the rotating shafts and the convex rings are equal.

[0013] Further, an arc-shaped block is provided on the third gear. A plurality of limiting grooves are provided on the arc-shaped block. A driving wheel is rotatably connected to the tank body. A limiting block contacting the limiting grooves is provided on one side of the driving wheel. A cam meshing with the third gear is provided on the other side of the driving wheel.

[0014] Further, a connecting flange is provided at the end of the recycling box, and a flange cover detachably connected to the connecting flange. A protrusion is provided on the connecting flange. A groove slidably connected to the protrusion is provided on the flange cover. A first sealing ring and a second sealing ring are respectively provided between the protrusion and the flange cover, and between the groove and the connecting flange.

[0015] Further, a guiding hole is provided on the flange cover, a guiding block slidably connected to the guiding hole is provided on the connecting flange, the end of the guiding block passes through the guiding hole and is slidably connected to a T-shaped block, a first inclined surface contacting the flange cover is provided on the T-shaped block, and a locking block for driving the T-shaped block to move is slidably connected to the guiding block.

[0016] Further, a second inclined surface contacting the T-shaped block is provided at the end of the locking block, a first spring is provided between the two T-shaped blocks, a ball is slidably connected to the locking block, a groove contacting the ball is provided on the guiding block, and a second spring is provided between the ball and the locking block.

[0017] Further, an inclined plate is provided at the top of the recycling box, there is a gap between the inclined plate and the recycling box, a number of sixth through holes are provided on the inclined plate, the L-shaped block is arranged in an inverted manner, and the second partition plate and the third partition plate are arranged obliquely.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. When sewage needs to be treated, the sewage enters the first mixing chamber at the bottom of the tank body from the water inlet, and the flocculant enters the first mixing chamber from the dosing pipe to be mixed with the sewage. At the same time, through the diversion of the first spiral plate in the first mixing chamber, the sewage no longer flows in a straight line but forms a spiral path, greatly increasing the degree of fluid disturbance and making the mixing between fluids more sufficient. In addition, the first spiral plate can extend the flow path of the sewage in the first spiral plate, allowing the sewage to fully contact the flocculant, so that the colloids and fine suspended matters in the water are completely aggregated into large particle impurities, facilitating the removal of impurities in the sewage and improving the effect of treating sewage.

[0020] In addition, when the sewage and the flocculant are mixed and undergo a precipitation reaction, after the sewage and the aggregated large particle impurities are guided by the first spiral plate and spiral upward in the first mixing chamber, due to the different centrifugal forces received by the aggregated large particle impurities and the sewage with different densities, the aggregated large particle impurities are thrown onto the second partition plate and flow out from the first overflow port through a number of first outlets provided on the second partition plate, realizing the separation of water and the aggregated large particle impurities. In addition, the impact force generated during the spiral process of the water flow will carry away the large particle impurities staying on the second partition plate for a long time, avoiding the blockage of the first outlet by the large particle impurities, thereby improving the efficiency of filtering large particle impurities in the sewage.

[0021] 2. After the sewage accompanied by large particle impurities flows into the first sedimentation chamber, the large particle impurities gradually settle to the bottom under the action of gravity and enter the recovery box. The sewage passes through the through holes provided on the first partition plate, so that the sewage containing a small amount of impurities enters the second mixing chamber from the first sedimentation chamber. Through the diversion of the second spiral plate, the large particle impurities are further separated from the water flow, and it flows through the second outlet and into the second sedimentation chamber from the second overflow port. Then, under the action of gravity, the large particle impurities settle at the bottom of the second sedimentation chamber and enter the recovery box, thereby performing secondary filtration treatment on the sewage and improving the effect of sewage treatment;

[0022] Finally, the clear water after removing the large particle impurities gradually rises and flows into the overflow chamber provided at the top of the tank body through the first through hole, the second through hole, and the third through hole respectively, and is discharged from the water outlet, thereby realizing the removal of large particle impurities in the sewage. At the same time, the first through hole, the second through hole, and the third through hole are directly smaller than the large particle impurities to prevent them from entering the overflow chamber;

[0023] 3. Since different sewage treatments require different flocculants to be added, and the outer diameters of the formed large particle impurities also vary. When the outer diameter of the large particle impurities changes, it is necessary to adjust the sizes of the first filter hole, the second filter hole, the first overflow port, and the second overflow port, so that the large particle impurities can smoothly flow from the first mixing chamber into the first sedimentation chamber or from the second mixing chamber into the second mixing chamber, while preventing a large amount of separated clear water from entering the subsequent chambers, thereby improving the efficiency of removing large particle impurities from the sewage;

[0024] 4. When it is necessary to adjust the sizes of the first outlet, the second outlet, the first overflow port, and the second overflow port, turn the driving wheel on the tank body. Through the cooperation among the driving wheel, the limiting block, the limiting groove, the cam, and the third gear, the third gear is driven to rotate on the tank body. Since the third gear meshes with several first gears at the same time, several first gears will be driven to rotate on the tank body. In addition, since the fourth gear meshes with the adjacent first gear and the second gear at the same time, several second gears will be driven to rotate on the tank body, and then the fixing blocks located on the first driving rod and the second driving rod are driven to move up and down respectively, releasing the force exerted by the fixing blocks on the conical ring, so that the sealing strip provided between the conical ring and the first driving rod or the second driving rod is in a loose state, facilitating the subsequent adjustment of the positions of the first driving rod and the second driving rod. At the same time, when adjusting the positions of the first driving rod or the second driving rod, it can prevent the first driving rod or the second driving rod from being excessively worn with the sealing strip, resulting in damage to the sealing effect of the subsequent sealing strip, preventing subsequent water flow from flowing out through the gaps of the first driving rod or the second driving rod, and improving the overall sealing performance of the tank body, preventing external dust from entering the overflow chamber and causing the clear water for removing large particle impurities to be polluted again, thereby improving the effect of sewage treatment;

[0025] In addition, since the fixed block is threadedly connected to the corresponding convex ring, the first turntable and the second turntable are respectively threadedly connected to the corresponding rotating shafts, and the pitches provided on the convex ring and the rotating shafts are equal, the first gear, the second gear, the third gear, and the fourth gear move up and down simultaneously. During the process of moving the fixed block, the first gear, the second gear, the third gear, and the fourth gear are always in a meshed state, thereby improving the stability of the overall structure, reducing the number of maintenance times, and improving the efficiency of sewage treatment;

[0026] 5. When the sealing strip becomes loose, by moving the first driving rod or the second driving rod up and down on the pipe body, and cooperating with the first connecting rod or the second connecting rod to transfer the component force, the first baffle or the second baffle is driven to move on the second partition or the third partition, thereby changing the sizes of the first filter holes and the second filter holes. At the same time, since the third connecting rod provided on the first baffle or the second baffle is rotatably connected to the swing plate, the swing plate will be driven to rotate on the cross plate, thereby changing the sizes of the first overflow port and the second overflow port, enabling large-particle impurities of different particle sizes to smoothly flow from the first mixing chamber into the first sedimentation chamber or from the second mixing chamber into the second mixing chamber, while preventing a large amount of separated clear water from entering the subsequent chamber, thereby improving the efficiency of removing large-particle impurities from the sewage. In addition, there is no need to separately set up power devices for separate driving, reducing the space required for installing the power devices and the manufacturing cost;

[0027] After adjusting the positions of the first driving rod or the second driving rod, the driving wheel drives the fixed block provided on the first driving rod and the second driving rod to move downward, and through the cooperation among the fixed block, the conical surface, and the conical ring, the conical ring is driven to move downward on the convex ring, compressing the sealing strip provided between the conical ring and the first driving rod or the second driving rod, so that the sealing strip is in a tight state, filling the gap between the first driving rod or the second driving rod and the tank body, further improving the sealing performance of the tank body, preventing external dust from entering the overflow chamber, resulting in the clear water for removing large-particle impurities being polluted again, and thus improving the effect of sewage treatment;

[0028] In addition, after driving the third gear to rotate a certain angle, the limiting block provided on one side of the driving wheel will re-enter the limiting groove. At the same time, through the resistance generated by the contact between the limiting block and the limiting groove, the rotation of the third gear on the tank body is restricted, avoiding the unintentional driving of the third gear by external force, which affects the sealing effect of the gap between the first driving rod or the second driving rod and the tank body by the sealing strip, and further improving the sealing performance of the tank body, preventing external dust from entering the overflow chamber, resulting in the clear water for removing large-particle impurities being polluted again, and thus improving the effect of sewage treatment;

[0029] 6. When it is necessary to connect the flange cover and the connecting flange, press the locking block. Through the cooperation among the guiding block, the locking block, the second inclined surface, the T-shaped block, the first inclined surface, and the flange cover, the flange cover is pushed closer to the connecting flange, further compressing the first sealing ring and the second sealing ring provided between the flange cover and the connecting flange, strengthening the double sealing between the flange cover and the connecting flange, preventing sewage from discharging between the flange cover and the connecting flange during the sewage treatment process, thereby improving the efficiency of sewage treatment;

[0030] Finally, the balls provided on both sides of the locking block slide into the corresponding grooves. Through the resistance generated by the contact between the balls and the grooves, and in cooperation with the resilience generated after the compression of the second spring, the locking block is prevented from moving on the guiding block, avoiding the accidental movement of the locking block by external forces during the sewage treatment process and affecting the stability of the overall structure. In addition, instead of screwing several fixing bolts, only by moving the locking block can the connection between the flange cover and the connecting flange be realized, which simplifies the operation steps of connecting the flange cover and the connecting flange to a certain extent and further improves the efficiency of sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Attached Figure 1 is a schematic diagram of the internal structure of the tank body of the present invention.

[0032] Attached Figure 2 is a schematic diagram of the swing plate of the present invention.

[0033] Attached Figure 3 is a schematic diagram of the third gear of the present invention.

[0034] Attached Figure 4 is a schematic diagram of the tapered ring of the present invention.

[0035] Attached Figure 5 is the present invention attached Figure 3 is a partial enlarged view of part B in the figure.

[0036] Attached Figure 6 is a schematic diagram of the flange cover of the present invention.

[0037] Attached Figure 7 is the present invention attached Figure 6 is a partial enlarged view of part C in the figure.

[0038] Attached Figure 8 is the present invention attached Figure 1 is a partial enlarged view of part A in the figure.

[0039] Reference numerals shown in the drawings:

[0040] 1. Inlet; 2. Outlet; 3. First partition; 4. Second partition; 5. Third partition; 6. First mixing chamber; 7. First sedimentation chamber; 8. Second mixing chamber; 9. Second sedimentation chamber; 10. Flocculant dosing pipe; 11. First outlet; 12. Second outlet; 13. First spiral plate; 14. Second spiral plate; 15. L-shaped block; 16. First overflow port; 17. Second overflow port; 18. Recovery box; 19. Through hole; 20. Overflow chamber; 21. First through hole; 22. Second through hole; 23. Third through hole;

[0041] 24. Cross plate; 25. Swing plate; 26. First baffle; 27. Second baffle; 28. Fourth through hole; 29. Fifth through hole; 30. First drive rod; 31. Second drive rod; 32. First connecting rod; 33. Second connecting rod; 34. Third connecting rod;

[0042] 35. Convex ring; 36. Tapered ring; 37. Sealing strip; 38. Fixed block; 39. Tapered surface; 40. First gear; 41. Second gear; 42. Rotating shaft; 43. First turntable; 44. Second turntable; 45. Third gear; 46. Fourth gear; 47. Arc-shaped block; 48. Limiting groove; 49. Driving wheel; 50. Limiting block; 51. Cam;

[0043] 52. Connecting flange; 53. Flange cover; 54. Protrusion; 55. Groove; 56. First sealing ring; 57. Second sealing ring; 58. Guide hole; 59. Guide block; 60. T-shaped block; 61. First inclined surface; 62. Lock block; 63. Second inclined surface; 64. First spring; 65. Ball; 66. Groove; 67. Second spring;

[0044] 68. Inclined plate; 69. Sixth through hole. Detailed implementation manners

[0045] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by this application.

[0046] The present invention provides an urban sewage filtration and purification device, such as Figure 1 and Figure 2As shown in the figure, it includes a tank body, as well as a water inlet 1 and a water outlet 2 provided at the bottom end and the top end of the tank body. A first partition 3, a second partition 4 and a third partition 5 are provided inside the tank body. The first partition 3 divides the tank body into a first filtration area and a second filtration area. The second partition 4 divides the first filtration area into a first mixing chamber 6 and a first sedimentation chamber 7. The third partition 5 divides the second filtration area into a second mixing chamber 8 and a second sedimentation chamber 9, so as to perform secondary filtration treatment on sewage and improve the effect of sewage treatment.

[0047] Flocculant feeding pipes 10 are provided at the bottoms of the first mixing chamber 6 and the second mixing chamber 8. Specifically, an annular pipe is provided, and a number of third outlets are provided on the annular pipe, so that the flocculant is evenly fed into the first mixing chamber 6 and the second mixing chamber 8, and is fully mixed with the sewage, further improving the effect of sewage treatment.

[0048] A first outlet 11 communicating the first mixing chamber 6 and the first sedimentation chamber 7 is provided on the second partition 4. A second outlet 12 communicating the second mixing chamber 8 and the second sedimentation chamber 9 is provided on the third partition 5. First spiral plates 13 and second spiral plates 14 used in cooperation with the first outlet 11 and the second outlet 12 are respectively provided in the first mixing chamber 6 and the second mixing chamber 8. L-shaped blocks 15 are respectively provided at the first outlet 11 and the second outlet 12. First overflow ports 16 and second overflow ports 17 are respectively formed between the L-shaped blocks 15 and the second partition 4 and the third partition 5. The first overflow ports 16 and the second overflow ports 17 are respectively communicated with the first outlet 11 and the second outlet 12. Recovery boxes 18 are provided at the bottoms of the first sedimentation chamber 7 and the second sedimentation chamber 9. Through the diversion of the first spiral plate 13 in the first mixing chamber 6, the sewage no longer flows in a straight line, but forms a spiral path, greatly increasing the degree of fluid disturbance and making the mixing between fluids more sufficient. In addition, the first spiral plate 13 can extend the flow path of the sewage in the first spiral plate 13, allowing the sewage to come into full contact with the flocculant, so that the colloids and fine suspended matters in the water are completely coagulated into large particle impurities, facilitating the removal of impurities in the sewage and improving the effect of sewage treatment. In addition, when the sewage and the flocculant are mixed and undergo a precipitation reaction, the sewage and the coagulated large particle impurities are guided by the first spiral plate 13 and spiral upward in the first mixing chamber 6. Due to the different centrifugal forces received by the coagulated large particle impurities and the sewage due to their different densities, the coagulated large particle impurities are thrown onto the second partition 4 and pass through a number of first outlets 11 provided on the second partition 4, and flow out through the first overflow port 16, realizing the separation of water and the coagulated large particle impurities. In addition, the impact force generated during the spiral process of the water flow will carry away the large particle impurities staying on the second partition 4 for a long time, avoiding the blockage of the first outlet 11 by the large particle impurities, thereby improving the efficiency of filtering large particle impurities in the sewage.

[0049] After the sewage accompanied by large particle impurities flows into the first sedimentation chamber 7, the large particle impurities gradually settle to the bottom under the action of gravity and enter the recovery box 18, while the sewage passes through the through holes 19 provided on the first partition plate 3, enabling the sewage containing a small amount of impurities to enter the second mixing chamber 8 from the first sedimentation chamber 7. Through the diversion of the second spiral plate 14, the large particle impurities are further separated from the water flow, and the water flows through the second outlet 12 and into the second sedimentation chamber 9 through the second overflow port 17. Then, under the action of gravity, the large particle impurities settle at the bottom of the second sedimentation chamber 9 and enter the recovery box 18, thereby performing secondary filtration treatment on the sewage and improving the effect of sewage treatment;

[0050] The bottom of the first partition plate 3 is provided with through holes 19 that communicate the first sedimentation chamber 7 and the second mixing chamber 8, enabling the sewage containing a small amount of impurities to enter the second mixing chamber 8 for secondary treatment of the sewage, thereby improving the effect of sewage treatment;

[0051] The top of the tank body is provided with an overflow chamber 20 that communicates with the water outlet 2, as well as a first through hole 21, a second through hole 22, and a third through hole 23 that communicate the overflow chamber 20 with the first mixing chamber 6, the overflow chamber 20 with the second mixing chamber 8, and the overflow chamber 20 with the second sedimentation chamber 9. Finally, the clear water after removing the large particle impurities gradually rises and flows into the overflow chamber 20 provided at the top of the tank body through the first through hole 21, the second through hole 22, and the third through hole 23, and is discharged through the water outlet 2, thereby realizing the removal of large particle impurities in the sewage. At the same time, the first through hole 21, the second through hole 22, and the third through hole 23 are directly smaller than the large particle impurities to prevent them from entering the overflow chamber 20.

[0052] Preferably, as Figure 1 and Figure 2As shown, the L-shaped block 15 includes a horizontal plate 24 and a swing plate 25 rotatably arranged on the horizontal plate 24. A first baffle 26 and a second baffle 27 are respectively slidably connected to the second partition plate 4 and the third partition plate 5. A fourth through hole 28 and a fifth through hole 29 are respectively provided on the first baffle 26 and the second baffle 27. The first outlet 11 communicates with the fourth through hole 28, and the second outlet 12 and the fifth through hole 29 communicate with each other to form a first filter hole and a second filter hole. A plurality of first driving rods 30 and second driving rods 31 are slidably connected to the tank body. The end parts of the first driving rod 30 and the second driving rod 31 are respectively rotatably connected to a first connecting rod 32 and a second connecting rod 33. The end parts of the first connecting rod 32 and the second connecting rod 33 are respectively rotatably connected to the first baffle 26 and the second baffle 27. A third connecting rod 34 is rotatably connected to both the first baffle 26 and the second baffle 27. The third connecting rod 34 is respectively rotatably connected to the swing plate 25. By moving the first driving rod 30 or the second driving rod 31 up and down on the pipe body, and cooperating with the first connecting rod 32 or the second connecting rod 33 to transmit partial forces, the first baffle 26 or the second baffle 27 is driven to move on the second partition plate 4 or the third partition plate 5, so as to change the sizes of the first filter hole and the second filter hole. At the same time, since the third connecting rod 34 provided on the first baffle 26 or the second baffle 27 is rotatably connected to the swing plate 25, the swing plate 25 will be driven to rotate on the horizontal plate 24, so as to change the sizes of the first overflow port 16 and the second overflow port 17, enabling large-particle impurities with different particle sizes to smoothly flow from the first mixing chamber 6 into the first sedimentation chamber 7 or from the second mixing chamber 8 into the second mixing chamber 8, while preventing a large amount of separated clear water from entering the subsequent chamber, thereby improving the efficiency of removing large-particle impurities from sewage. In addition, there is no need to separately set up power devices to drive respectively, reducing the space required for installing power devices and the cost required for manufacturing.

[0053] Preferably, as Figure 3 and Figure 4As shown, several convex rings 35 are provided at the top of the tank body. A conical ring 36 is slidably connected to the convex ring 35. Sealing strips 37 are provided between the conical ring 36 and the first driving rod 30 and the second driving rod 31 respectively. A fixing block 38 is threadedly connected to the convex ring 35. The end of the fixing block 38 is provided with a conical surface 39 that contacts the conical ring 36. After adjusting the positions of the first driving rod 30 or the second driving rod 31, by reversely rotating the driving wheel 49, similarly drive the fixing blocks 38 provided on the first driving rod 30 and the second driving rod 31 to move downward, and make the conical surface 39 provided on the fixing block 38 contact the conical ring 36. The generated component force drives the conical ring 36 to move downward on the convex ring 35, compressing the sealing strip 37 provided between the conical ring 36 and the first driving rod 30 or the second driving rod 31, so that the sealing strip 37 is in a tight state, filling the gap between the first driving rod 30 or the second driving rod 31 and the tank body, further improving the sealing performance of the tank body, preventing external dust from entering the overflow chamber 20, causing the clear water for removing large particle impurities to be polluted again, and thus improving the effect of treating sewage.

[0054] Preferably, as Figure 3 and Figure 4As shown, a first gear 40 and a second gear 41 are respectively provided on the fixed blocks 38 on the first driving rod 30 and the second driving rod 31. A plurality of rotating shafts 42 are provided on the tank body. A first turntable 43 is threadedly connected to one of the rotating shafts 42, and second turntables 44 are respectively threadedly connected to the remaining rotating shafts 42. A third gear 45 that meshes with a plurality of first gears 40 simultaneously is provided on the first turntable 43. A fourth gear 46 that meshes with an adjacent first gear 40 and second gear 41 simultaneously is provided on the second turntable 44. The pitches provided on the rotating shafts 42 and the convex rings 35 are equal. When driving the third gear 45 to rotate on the tank body, since the third gear 45 meshes with a plurality of first gears 40 simultaneously, it will drive a plurality of first gears 40 to rotate on the tank body. In addition, since the fourth gear 46 meshes with an adjacent first gear 40 and second gear 41 simultaneously, it will drive a plurality of second gears 41 to rotate on the tank body, and then drive the fixed blocks 38 on the first driving rod 30 and the second driving rod 31 to move up and down respectively, releasing the force applied by the fixed blocks 38 on the tapered ring 36, so that the sealing strip 37 provided between the tapered ring 36 and the first driving rod 30 or the second driving rod 31 is in a loose state, facilitating the subsequent adjustment of the positions of the first driving rod 30 and the second driving rod 31. At the same time, when adjusting the positions of the first driving rod 30 or the second driving rod 31, it can avoid excessive wear between the first driving rod 30 or the second driving rod 31 and the sealing strip 37, resulting in damage to the sealing effect of the subsequent sealing strip 37, preventing subsequent water flow from flowing out through the gaps of the first driving rod 30 or the second driving rod 31, and improving the overall sealing performance of the tank body, preventing external dust from entering the overflow chamber 20, resulting in re - contamination of the clear water for removing large - particle impurities, and thus improving the effect of treating sewage; in addition, since the fixed blocks 38 are threadedly connected to the corresponding convex rings 35, the first turntable 43 and the second turntable 44 are respectively threadedly connected to the corresponding rotating shafts 42, and the pitches provided on the convex rings 35 and the rotating shafts 42 are equal, the first gear 40, the second gear 41, the third gear 45 and the fourth gear 46 move up and down simultaneously, so that during the process of moving the fixed block 38, the first gear 40, the second gear 41, the third gear 45 and the fourth gear 46 are always in a meshing state, thereby improving the stability of the overall structure, reducing the number of maintenance times, and improving the efficiency of treating sewage.

[0055] Preferably, as Figure 3 and Figure 5As shown, the third gear 45 is provided with an arc block 47, and the arc block 47 is provided with a plurality of limiting grooves 48. A driving wheel 49 is rotatably connected to the tank body, and a limiting block 50 is provided on one side of the driving wheel 49 in contact with the limiting groove 48. A cam 51 is provided on the other side of the driving wheel 49 that meshes with the third gear 45. By toggling the driving wheel 49, the cam 51 provided on the other side of the driving wheel 49 is engaged with the third gear 45, which will drive the third gear 45 to rotate on the tank body, thereby changing the state of the sealing strip 37, and avoiding the first driving rod 30 or the second driving rod 31 from being in contact with the sealing strip 37 when the first driving rod 30 or the second driving rod 31 is moved. Excessive wear will affect the subsequent sealing effect; in addition, each time the third gear 45 is driven to rotate a certain angle, the limit block 50 provided on one side of the driving wheel 49 will re-enter the limit groove 48. At the same time, the resistance generated by the contact between the limit block 50 and the limit groove 48 will limit the rotation of the third gear 45 on the tank body, thereby preventing external force from accidentally driving the third gear 45 to rotate, affecting the sealing effect of the sealing strip 37 on the gap between the first driving rod 30 or the second driving rod 31 and the tank body, thereby further improving the sealing performance of the tank body, preventing external dust from entering the overflow chamber 20, causing the clean water from which large particles of impurities are removed to be contaminated again, thereby improving the effect of sewage treatment.

[0056] Preferably, Figure 1 and Figure 6 As shown, the end of the recovery box 18 is provided with a connecting flange 52 and a flange cover 53 detachably connected to the connecting flange 52, so that the flange cover 53 can be removed from the connecting flange 52, which is convenient for clearing large particles of impurities in the recovery box 18, thereby improving the efficiency of sewage treatment; the connecting flange 52 is provided with a protrusion 54, and the flange cover 53 is provided with a groove 55 slidably connected to the protrusion 54, which plays a guiding role in the connection between the connecting flange 52 and the flange cover 53, thereby improving the stability of the overall connection; a first sealing ring 56 and a second sealing ring 57 are respectively provided between the protrusion 54 and the flange cover 53, and between the groove 55 and the connecting flange 52, to achieve double sealing between the flange cover 53 and the connecting flange 52, thereby preventing a large amount of sewage from being discharged between the flange cover 53 and the connecting flange 52 during sewage treatment, thereby improving the efficiency of sewage treatment.

[0057] Preferably, Figure 6As shown, a guiding hole 58 is provided on the flange cover 53, and a guiding block 59 slidably connected to the guiding hole 58 is provided on the connecting flange 52. The end of the guiding block 59 passes through the guiding hole 58 and is slidably connected to a T-shaped block 60. A first inclined surface 61 in contact with the flange cover 53 is provided on the T-shaped block 60. A locking block 62 for driving the T-shaped block 60 to move is slidably connected to the guiding block 59. After the guiding block 59 passes through the guiding hole 58, the T-shaped block 60 is driven to move on the guiding block 59 by the locking block 62, driving the first inclined surface 61 provided at the end of the T-shaped block 60 to contact the flange cover 53. The component force generated after the contact further pushes the flange cover 53 closer to the connecting flange 52, further compressing the first sealing ring 56 and the second sealing ring 57 provided between the flange cover 53 and the connecting flange 52, strengthening the double sealing between the flange cover 53 and the connecting flange 52, preventing sewage from discharging between the flange cover 53 and the connecting flange 52 during the sewage treatment process, and thus improving the sewage treatment efficiency.

[0058] Preferably, as Figure 6 and Figure 7 shown, a second inclined surface 63 in contact with the T-shaped block 60 is provided at the end of the locking block 62. A first spring 64 is provided between the two T-shaped blocks 60 for resetting the T-shaped block 60, thereby releasing the connection between the flange cover 53 and the connecting flange 52, facilitating the subsequent removal of large particle impurities in the recycling box 18; a ball is slidably connected to the locking block 62, and a groove 66 in contact with the ball is provided on the guiding block 59. A second spring 67 is provided between the ball and the locking block 62. When it is necessary to fix the flange cover 53 and the connecting flange 52, by pressing the locking block 62, it slides on the guiding block 59, and the second inclined surface 63 provided at the end of the locking block 62 contacts the T-shaped block 60. The component force generated after the contact drives the T-shaped block 60 to move on the guiding block 59, thereby driving the flange cover 53 closer to the connecting flange 52, further compressing the first sealing ring 56 and the second sealing ring 57 provided between the flange cover 53 and the connecting flange 52, strengthening the double sealing between the flange cover 53 and the connecting flange 52, preventing sewage from discharging between the flange cover 53 and the connecting flange 52 during the sewage treatment process, and thus improving the sewage treatment efficiency; finally, the balls provided on both sides of the locking block 62 slide into the corresponding grooves 66, and through the resistance generated by the contact between the balls and the grooves 66, combined with the resilience generated after the compression of the second spring 67, prevent the locking block 62 from moving on the guiding block 59, avoiding the accidental movement of the locking block 62 by external forces during the sewage treatment process and affecting the stability of the overall structure. In addition, without the need to screw several fixing bolts, only by moving the locking block 62 can the connection between the flange cover 53 and the connecting flange 52 be achieved, which simplifies the operation steps for connecting the flange cover 53 and the connecting flange 52 to a certain extent and further improves the sewage treatment efficiency.

[0059] Preferably, as Figure 1and Figure 8 As shown, a sloping plate 68 is provided at the top of the recycling bin 18. There is a gap between the sloping plate 68 and the recycling bin 18. A number of sixth through-holes are provided on the sloping plate 68. When large particulate impurities sink onto the recycling bin 18, they come into contact with the sloping plate 68, and the generated component force drives the large particulate impurities to move to one side until the large particulate impurities enter the recycling bin 18 through the gap between the sloping plate 68 and the recycling bin 18. When the large particulate impurities rise, since other large particulate impurities continuously enter at the gap, the outflow of the large particulate impurities in the recycling bin 18 will be restricted, while the clear water in the recycling bin 18 returns to the first sedimentation chamber 7 or the second sedimentation chamber 9 through the sixth through-holes provided on the sloping plate 68. In addition, the L-shaped block 15 is arranged in an inverted manner to prevent the large particulate impurities that sink in the first sedimentation chamber 7 and the second sedimentation chamber 9 from flowing back through the first overflow port 16 and the second overflow port 17. The second partition plate 4 and the third partition plate 5 are arranged obliquely, so that the cross-section of the first mixing chamber 6 or the second mixing chamber 8 gradually decreases from bottom to top. Since the flow rate of the water flow remains unchanged, the flow velocity of the water flow will be gradually increased, and the large particulate impurities contained in the sewage can be better thrown out, improving the effect of treating sewage.

[0060] Embodiment 1

[0061] The present invention provides an urban sewage filtration and purification device. As Figure 1 and Figure 2 shown, when sewage needs to be treated, the sewage enters the first mixing chamber 6 at the bottom of the tank body from the water inlet 1, and the flocculant enters the first mixing chamber 6 from the dosing pipe to mix with the sewage. At the same time, through the diversion of the first spiral plate 13 in the first mixing chamber 6, the sewage no longer flows in a straight line but forms a spiral path, greatly increasing the degree of fluid disturbance and making the mixing between fluids more sufficient; in addition, the first spiral plate 13 can extend the flow path of the sewage in the first spiral plate 13, allowing the sewage to fully contact with the flocculant, so that the colloids and fine suspended matters in the water are completely coagulated into large particulate impurities, facilitating the removal of impurities in the sewage and improving the effect of treating sewage;

[0062] In addition, when the sewage and the flocculant undergo a precipitation reaction and are mixed, when the sewage and the coagulated large particulate impurities are guided by the first spiral plate 13 and spiral upward in the first mixing chamber 6, due to the different centrifugal forces received by the coagulated large particulate impurities and the sewage because of their different densities, the coagulated large particulate impurities are thrown onto the second partition plate 4 and flow out through the first overflow port 16 through a number of first outlets 11 provided on the second partition plate 4, realizing the separation of water and the coagulated large particulate impurities. In addition, the impact force generated during the spiral process of the water flow will carry away the large particulate impurities that stay on the second partition plate 4 for a long time, preventing the large particulate impurities from blocking the first outlets 11, thereby improving the efficiency of filtering large particulate impurities in the sewage;

[0063] After the sewage accompanied by large particle impurities flows into the first sedimentation chamber 7, the large particle impurities gradually settle to the bottom under the action of gravity and enter the recovery box 18, while the sewage passes through the through holes 19 provided on the first partition plate 3, enabling the sewage containing a small amount of impurities to enter the second mixing chamber 8 from the first sedimentation chamber 7. Through the diversion of the second spiral plate 14, the large particle impurities are further separated from the water flow, and the water flow passes through the second outlet 12 and flows into the second sedimentation chamber 9 from the second overflow port 17. Then, under the action of gravity, the large particle impurities settle at the bottom of the second sedimentation chamber 9 and enter the recovery box 18, thereby performing secondary filtration treatment on the sewage and improving the effect of sewage treatment;

[0064] Finally, the clear water after removing the large particle impurities gradually rises and flows into the overflow chamber 20 provided at the top of the tank body through the first through hole 21, the second through hole 22, and the third through hole 23 respectively, and is discharged from the water outlet 2, thereby realizing the removal of large particle impurities in the sewage. At the same time, the first through hole 21, the second through hole 22, and the third through hole 23 are directly smaller than the large particle impurities to prevent them from entering the overflow chamber 20.

[0065] Embodiment 2

[0066] On the basis of Embodiment 1, as Figures 1 - 5 shown, since the flocculants required for different sewage treatments are different, and the outer diameters of the formed large particle impurities also vary. When the outer diameter of the large particle impurities changes, it is necessary to adjust the sizes of the first filter hole, the second filter hole, the first overflow port 16, and the second overflow port 17, so that the large particle impurities can smoothly flow from the first mixing chamber 6 into the first sedimentation chamber 7 or from the second mixing chamber 8 into the second mixing chamber 8, while preventing a large amount of separated clear water from entering the subsequent chambers, thereby improving the efficiency of removing large particle impurities in the sewage;

[0067] When it is necessary to adjust the sizes of the first outlet 11, the second outlet 12, the first overflow port 16 and the second overflow port 17, by turning the driving wheel 49 on the tank body, the limit block 50 provided on one side of the driving wheel 49 slides out of the limit groove 48, releasing the restriction on the rotation of the third gear 45 on the tank body. Then, further turn the driving wheel 49 so that the cam 51 provided on the other side of the driving wheel 49 meshes with the third gear 45 and drives the third gear 45 to rotate on the tank body. Since the third gear 45 meshes with a plurality of first gears 40 at the same time, it will drive a plurality of first gears 40 to rotate on the tank body. In addition, since the fourth gear 46 meshes with the adjacent first gear 40 and the second gear 41 at the same time, it will drive a plurality of second gears 41 to rotate on the tank body, and then drive the fixing blocks 38 located on the first driving rod 30 and the second driving rod 31 to move up and down respectively, releasing the force applied by the fixing blocks 38 on the tapered ring 36, so that the sealing strip 37 provided between the tapered ring 36 and the first driving rod 30 or the second driving rod 31 is in a loose state, facilitating the subsequent adjustment of the positions of the first driving rod 30 and the second driving rod 31. At the same time, when adjusting the positions of the first driving rod 30 or the second driving rod 31, it can avoid excessive wear of the first driving rod 30 or the second driving rod 31 and the sealing strip 37, resulting in damage to the sealing effect of the subsequent sealing strip 37, preventing subsequent water from flowing out through the gaps of the first driving rod 30 or the second driving rod 31, and improving the overall sealing performance of the tank body, preventing external dust from entering the overflow chamber 20 and causing the clean water for removing large particle impurities to be polluted again, thereby improving the effect of treating sewage; In addition, since the fixing blocks 38 are threadedly connected to the corresponding convex rings 35, the first turntable 43 and the second turntable 44 are respectively threadedly connected to the corresponding rotating shafts 42, and the pitches provided on the convex rings 35 and the rotating shafts 42 are equal, the first gear 40, the second gear 41, the third gear 45 and the fourth gear 46 move up and down at the same time, so that during the process of moving the fixing blocks 38, the first gear 40, the second gear 41, the third gear 45 and the fourth gear 46 are always in a meshing state, thereby improving the stability of the overall structure, reducing the number of maintenance times, and improving the efficiency of treating sewage;

[0068] When the sealing strip 37 becomes loose, by moving the first driving rod 30 or the second driving rod 31 up and down on the pipe body, and cooperating with the first connecting rod 32 or the second connecting rod 33 to transmit the component force, it drives the first baffle 26 or the second baffle 27 to move on the second partition plate 4 or the third partition plate 5, thereby changing the sizes of the first filter holes and the second filter holes. At the same time, since the third connecting rod 34 provided on the first baffle 26 or the second baffle 27 is rotatably connected to the swing plate 25, it will drive the swing plate 25 to rotate on the cross plate 24, thereby changing the sizes of the first overflow port 16 and the second overflow port 17, enabling large particle impurities of different particle sizes to smoothly flow from the first mixing chamber 6 into the first sedimentation chamber 7 or from the second mixing chamber 8 into the second mixing chamber 8, and at the same time preventing a large amount of separated clear water from entering the subsequent chambers, thereby improving the efficiency of removing large particle impurities in the sewage. In addition, there is no need to separately set up power devices to drive respectively, reducing the space required for installing the power devices and the cost required for manufacturing;

[0069] After adjusting the positions of the first driving rod 30 or the second driving rod 31, by reversely rotating the driving wheel 49, similarly drive the fixed block 38 provided on the first driving rod 30 and the second driving rod 31 to move downward, and through the conical surface 39 provided on the fixed block 38 contacting the conical ring 36, the generated component force drives the conical ring 36 to move downward on the convex ring 35, compressing the sealing strip 37 provided between the conical ring 36 and the first driving rod 30 or the second driving rod 31, so that the sealing strip 37 is in a tight state, filling the gap existing between the first driving rod 30 or the second driving rod 31 and the tank body, further improving the sealing performance of the tank body, preventing external dust from entering the overflow chamber 20, resulting in the clear water for removing large particle impurities being polluted again, and further improving the effect of treating sewage;

[0070] In addition, after each driving the third gear 45 to rotate a certain angle, the limiting block 50 provided on one side of the driving wheel 49 will re-enter the limiting groove 48, and at the same time, through the resistance generated by the contact between the limiting block 50 and the limiting groove 48, it will limit the rotation of the third gear 45 on the tank body, avoiding the third gear 45 being driven to rotate inadvertently by an external force, affecting the sealing effect of the sealing strip 37 on the gap existing between the first driving rod 30 or the second driving rod 31 and the tank body, and further improving the sealing performance of the tank body, preventing external dust from entering the overflow chamber 20, resulting in the clear water for removing large particle impurities being polluted again, and further improving the effect of treating sewage.

[0071] Embodiment 3

[0072] On the basis of Embodiment 1, as Figure 6 and Figure 7As shown in the figure, when it is necessary to fix the flange cover 53 and the connecting flange 52, by pressing the locking block 62, it slides on the guiding block 59, and the second inclined surface 63 provided at the end of the locking block 62 contacts the T-shaped block 60. The component force generated after the contact drives the T-shaped block 60 to move on the guiding block 59, driving the first inclined surface 61 provided at the end of the T-shaped block 60 to contact the flange cover 53. The component force generated after the contact further pushes the flange cover 53 closer to the connecting flange 52, further compressing the first sealing ring 56 and the second sealing ring 57 provided between the flange cover 53 and the connecting flange 52, strengthening the double sealing between the flange cover 53 and the connecting flange 52, preventing sewage from discharging between the flange cover 53 and the connecting flange 52 during the sewage treatment process, thereby improving the efficiency of sewage treatment;

[0073] Finally, the balls provided on both sides of the locking block 62 slide into the corresponding grooves 66. Through the resistance generated after the contact between the balls and the grooves 66, and in cooperation with the resilience generated after the compression of the second spring 67, it prevents the locking block 62 from moving on the guiding block 59, avoiding the accidental movement of the locking block 62 by external forces during the sewage treatment process and affecting the stability of the overall structure. In addition, instead of screwing several fixing bolts, only by moving the locking block 62 can the connection between the flange cover 53 and the connecting flange 52 be realized, which simplifies the operation steps of connecting the flange cover 53 and the connecting flange 52 to a certain extent and further improves the efficiency of sewage treatment;

[0074] When it is necessary to remove large particle impurities in the recycling box 18, the locking block 62 is toggled outward to release the restriction on the sliding of the T-shaped block on the guiding block 59. Under the action of the resilience generated after the compression of the first spring 64, the T-shaped block 60 is driven to slide on the guiding block 59 until the T-shaped block completely retracts into the guiding block 59, thereby releasing the connection between the flange cover 53 and the connecting flange 52, facilitating the subsequent removal of large particle impurities in the recycling box 18.

[0075] Embodiment 4

[0076] On the basis of Embodiment 1, as Figure 1 and Figure 8As shown, a sloping plate 68 is provided at the top of the recycling bin 18. There is a gap between the sloping plate 68 and the recycling bin 18. A number of sixth through-holes are provided on the sloping plate 68. When large particle impurities sink onto the recycling bin 18, they come into contact with the sloping plate 68, and the generated component force drives the large particle impurities to move to one side until the large particle impurities enter the recycling bin 18 through the gap between the sloping plate 68 and the recycling bin 18. When the large particle impurities rise, since other large particle impurities continuously enter at the gap, the outflow of the large particle impurities in the recycling bin 18 will be restricted. The clear water in the recycling bin 18 returns to the first sedimentation chamber 7 or the second sedimentation chamber 9 again through the sixth through-holes provided on the sloping plate 68. In addition, the L-shaped block 15 is arranged in an inverted manner to prevent the large particle impurities that sink in the first sedimentation chamber 7 and the second sedimentation chamber 9 from flowing back through the first overflow port 16 and the second overflow port 17. The second partition plate 4 and the third partition plate 5 are inclined, so that the cross-section of the first mixing chamber 6 or the second mixing chamber 8 gradually decreases from bottom to top. Since the flow rate of the water remains unchanged, the flow velocity of the water will be gradually increased, and the large particle impurities contained in the sewage can be better thrown out, improving the effect of treating sewage.

Claims

1. An urban sewage filtration and purification device, comprising a tank body, and a water inlet (1) and a water outlet (2) arranged at the bottom end and the top end of the tank body, characterized in that: A first partition plate (3), a second partition plate (4) and a third partition plate (5) are arranged inside the tank body. The first partition plate (3) divides the tank body into a first filtration area and a second filtration area. The second partition plate (4) divides the first filtration area into a first mixing chamber (6) and a first sedimentation chamber (7). The third partition plate (5) divides the second filtration area into a second mixing chamber (8) and a second sedimentation chamber (9). Flocculant feeding pipes (10) are arranged at the bottoms of the first mixing chamber (6) and the second mixing chamber (8). A first outlet (11) communicating the first mixing chamber (6) and the first sedimentation chamber (7) is arranged on the second partition plate (4). A second outlet (12) communicating the second mixing chamber (8) and the second sedimentation chamber (9) is arranged on the third partition plate (5). A first spiral plate (13) and a second spiral plate (14) which are used in cooperation with the first outlet (11) and the second outlet (12) are respectively arranged in the first mixing chamber (6) and the second mixing chamber (8). L-shaped blocks (15) are respectively arranged at the first outlet (11) and the second outlet (12). First overflow ports (16) and second overflow ports (17) are respectively formed between the L-shaped blocks (15) and the second partition plate (4) and the third partition plate (5). The first overflow ports (16) and the second overflow ports (17) are respectively communicated with the first outlet (11) and the second outlet (12). Recovery boxes (18) are arranged at the bottoms of the first sedimentation chamber (7) and the second sedimentation chamber (9). A through hole (19) communicating the first sedimentation chamber (7) and the second mixing chamber (8) is arranged at the bottom of the first partition plate (3). An overflow chamber (20) communicating with the water outlet (2) is arranged at the top of the tank body, and a first through hole (21), a second through hole (22) and a third through hole (23) which communicate the overflow chamber (20) with the first mixing chamber (6), the overflow chamber (20) with the second mixing chamber (8), and the overflow chamber (20) with the second sedimentation chamber (9) are provided. The L-shaped block (15) includes a horizontal plate (24) and a swing plate (25) rotatably arranged on the horizontal plate (24). A first baffle (26) and a second baffle (27) are respectively slidably connected to the second partition plate (4) and the third partition plate (5). Fourth through holes (28) and fifth through holes (29) are respectively arranged on the first baffle (26) and the second baffle (27). The first outlet (11) communicates with the fourth through hole (28), and the second outlet (12) communicates with the fifth through hole (29) to form a first filter hole and a second filter hole. A plurality of first drive rods (30) and second drive rods (31) are slidably connected to the tank body. The ends of the first drive rods (30) and the second drive rods (31) are respectively rotatably connected to a first connecting rod (32) and a second connecting rod (33). The ends of the first connecting rod (32) and the second connecting rod (33) are respectively rotatably connected to a first baffle (26) and a second baffle (27). Third connecting rods (34) are rotatably connected to both the first baffle (26) and the second baffle (27). The third connecting rods (34) are respectively rotatably connected to the swing plate (25). A plurality of convex rings (35) are provided at the top end of the tank body. A conical ring (36) is slidably connected to the convex rings (35). Sealing strips (37) are provided between the conical ring (36) and the first drive rods (30) and the second drive rods (31). A fixing block (38) is threadedly connected to the convex rings (35). A conical surface (39) that contacts the conical ring (36) is provided at the end of the fixing block (38). First gears (40) and second gears (41) are respectively provided on the fixing blocks (38) located on the first drive rods (30) and the second drive rods (31). A plurality of rotating shafts (42) are provided on the tank body. A first turntable (43) is threadedly connected to one of the rotating shafts (42), and second turntables (44) are respectively threadedly connected to the remaining rotating shafts (42). A third gear (45) that meshes with a plurality of first gears (40) simultaneously is provided on the first turntable (43). A fourth gear (46) that meshes with the adjacent first gear (40) and second gear (41) simultaneously is provided on the second turntable (44). The pitches provided on the rotating shafts (42) and the convex rings (35) are equal.

2. The urban sewage filtration and purification equipment according to claim 1, characterized in that: An arc-shaped block (47) is provided on the third gear (45). A plurality of limiting grooves (48) are provided on the arc-shaped block (47). A driving wheel (49) is rotatably connected to the tank body. A limiting block (50) that contacts the limiting grooves (48) is provided on one side of the driving wheel (49). A cam (51) that meshes with the third gear (45) is provided on the other side of the driving wheel (49).

3. An urban sewage filtration and purification device according to claim 1, characterized in that: A connecting flange (52) is provided at the end of the recycling box (18), and a flange cover (53) that is detachably connected to the connecting flange (52). A protrusion (54) is provided on the connecting flange (52). A groove (55) that slidably connects to the protrusion (54) is provided on the flange cover (53). A first sealing ring (56) and a second sealing ring (57) are respectively provided between the protrusion (54) and the flange cover (53), and between the groove (55) and the connecting flange (52).

4. An urban sewage filtration and purification device according to claim 3, characterized in that: The flange cover (53) is provided with a guide hole (58), the connecting flange (52) is provided with a guide block (59) that is slidably connected to the guide hole (58), the end of the guide block (59) passes through the guide hole (58), and is slidably connected to a T-shaped block (60). The T-shaped block (60) is provided with a first inclined surface (61) that contacts the flange cover (53), and a locking block (62) for driving the T-shaped block (60) to move is slidably connected to the guide block (59).

5. An urban sewage filtration and purification device according to claim 4, characterized in that: The end of the locking block (62) is provided with a second inclined surface (63) that contacts the T-shaped block (60). A first spring (64) is provided between the two T-shaped blocks (60). A ball (65) is slidably connected to the locking block (62). The guide block (59) is provided with a groove (66) that contacts the ball (65). A second spring (67) is provided between the ball (65) and the locking block (62).

6. The urban sewage filtration and purification equipment according to claim 1, characterized in that: The top of the recycling box (18) is provided with an inclined plate (68). There is a gap between the inclined plate (68) and the recycling box (18). The inclined plate (68) is provided with a plurality of sixth through holes (69). The L-shaped block (15) is arranged in an inverted manner. The second partition plate (4) and the third partition plate (5) are arranged obliquely.

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