A stacked cross-flow rotary sand filter

Abstract

The present invention relates to the field of filtration devices, and specifically relates to a stacked cross-flow sand-rotating filter. It includes a support frame, a cross-flow filtration unit, a water inlet pipeline, a drainage pipeline, a backwashing mechanism, a sewage discharge pipeline, a cross-flow water distribution mechanism, and a sand-rotating auxiliary cleaning mechanism. There are two cross-flow filtration units, which are respectively horizontally installed on the upper and lower layers of the support frame. The cross-flow water distribution mechanism includes a water distributor connected to the end of the water inlet pipeline, and a locking device and a deflection driving device that are drivingly connected to the water distributor. The sand-rotating auxiliary cleaning mechanism includes a cleaning roller that horizontally displaces along the surface layer of the sand-rotating filter material and a driving mechanism that is drivingly connected to the cleaning roller. The cleaning roller is provided with impurity removal gaps with a gap smaller than the size of the sand-rotating particles, and a cleaning plate that rotates relative to the outer wall of the cleaning roller is arranged inside the cleaning roller. The filtration area of the present invention is increased, the filtration flow rate is fast, the floor area of the equipment is reduced, the backwashing intensity and water demand are reduced, and the backwashing is fast and efficient.

Description

Technical Field

[0001] The invention relates to the field of filtering devices, in particular to a stacked cross-flow swirling sand filter. Background Art

[0002] The filter device uses different filter fillers as media to enhance flocculation and interception, and is widely used in deep treatment of municipal sewage and industrial wastewater. Traditional filter devices mostly use vertical flow or single cross-flow structure, which has many disadvantages in the sewage treatment process. The vertical flow structure is affected by the pressure drop of the filter layer, and the filtration flow rate is limited, which is usually low, resulting in insufficient equipment processing capacity; at the same time, the sand layer is unevenly distributed, making it difficult to achieve a balance between high flow rate and high-precision filtration. These problems have triggered a series of negative effects, such as the large footprint of the equipment, which increases the construction cost; the short backwash cycle and frequent backwashing not only consume a lot of water resources, but also lead to large backwashing water volume and high backwashing energy consumption; and during the backwashing process, the filter filler is lost a lot, which further increases the operating cost and reduces the practicality and economy of the filter device. Summary of the invention

[0003] Based on this, it is necessary to provide a stacked cross-flow vortex sand filter to address the existing technical problems.

[0004] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0005] The present invention provides a stacked cross-flow swirling sand filter, comprising a support frame, a cross-flow filter unit, a water inlet pipeline, a drainage pipeline, a backwash mechanism, a sewage pipeline, a cross-flow water distribution mechanism and a swirling sand auxiliary cleaning mechanism, wherein two cross-flow filter units are provided and are respectively installed transversely on the upper and lower layers of the support frame, and the two cross-flow filter units are both horizontal cylindrical cavities filled with swirling sand filter materials, and an operation hole is obliquely opened on one side of the cross-flow filter unit, and the water inlet pipeline, the drainage pipeline, the sewage pipeline and the backwash mechanism are all connected to the inside of the cross-flow filter unit through a flange, and the cross-flow water distribution mechanism includes a water distributor connected to the end of the water inlet pipeline and a transmission device connected to the water distributor. The invention relates to a locking device and a deflection drive device connected thereto, the water distributor is vertically arranged and a water retaining plate flush with the top of the swirling sand filter material is provided at the bottom of the water distributor, the swirling sand auxiliary cleaning mechanism comprises a cleaning roller which is horizontally displaced along the surface of the swirling sand filter material and a driving mechanism which is transmission-connected to the cleaning roller, the cleaning roller is connected to the sewage pipe, horizontal guide rails are horizontally arranged on the side walls at both ends of the cross-flow filter unit, both ends of the cleaning roller are slidingly arranged on the horizontal guide rails, the length direction of the cleaning roller is consistent with the length direction of the cross-flow filter unit, a debris removal gap which is smaller than the size of the swirling sand filter material is provided on the cleaning roller, and a cleaning plate which rotates relative to the outer wall of the cleaning roller is provided inside the cleaning roller.

[0006] Preferably, the backwash mechanism comprises a water backwash drainage pipeline, a water backwash water inlet pipeline, an air backwash air inlet pipeline and an air backwash exhaust pipeline, all of which are connected to the interior of the two cross-flow filter units.

[0007] Preferably, the water distributor is connected to the water inlet end of the water inlet pipe through a first bellows, a transmission seat is fixedly installed on the top of the water distributor, a mounting sleeve is sleeved on the first bellows, the top of the mounting sleeve is fixedly connected to the inner wall of the cross-flow filter unit, a sliding ring is fixedly installed on the bottom of the mounting sleeve, the deflection drive device includes a horizontally sliding transmission column, the transmission column and the sliding ring are slidably matched, the sliding direction of the transmission column is perpendicular to the length direction of the cross-flow filter unit, one end of the transmission column is hinged to the transmission seat, the locking device is clamped with the transmission seat, a sliding groove is horizontally provided on the side of the mounting sleeve, the length direction of the sliding groove is consistent with the length direction of the transmission column, a tension spring and a first transmission slider are provided in the sliding groove, the tension spring is located at one end of the first transmission slider close to the transmission seat, and the two ends of the tension spring are respectively fixedly connected to the sliding groove and the side walls of the first transmission slider, the deflection drive device also includes a second hinged rod, and the two ends of the second hinged rod are respectively hinged to the transmission seat and the first transmission slider.

[0008] Preferably, the locking device includes a horizontal fixed plate, a locking limit seat and a metal elastic clamping plate. A limit plate that cooperates with the metal elastic clamping plate is vertically provided on the top of the transmission seat. The horizontal fixed plate is fixedly installed on the inner wall of the cross-flow filter unit. The locking limit seat is fixedly installed on one side of the horizontal fixed plate close to the transmission seat. The locking limit seat is provided with a clamping groove for clamping the bottom plate of the transmission seat.

[0009] Preferably, the deflection drive device also includes a first linear drive, a first push rod, a first hinged rod and a hinge joint. The first linear drive is fixedly mounted on the support frame and is located at one end of the cross-flow filter unit. The first push rod is horizontally arranged inside the cross-flow filter unit. The length direction of the first push rod is consistent with the length direction of the cross-flow filter unit. The output end of the first linear drive is fixedly connected to the first push rod, one end of the first hinged rod is hinged to the first push rod, the other end of the first hinged rod is hinged to the hinge joint, and the hinge joint is fixedly connected to one end of the transmission column away from the transmission seat.

[0010] Preferably, a threaded sleeve is rotatably provided on the hinge head, an outer wall of one end of the transmission column close to the hinge head is provided with an external thread, and the transmission column is threadably connected to the hinge head through the threaded sleeve.

[0011] Preferably, the cleaning roller is composed of a fixed center rod, a roller shell, a connecting ring, a rectangular slider and a cleaning sleeve. The fixed center rod and the roller shell are coaxially arranged, and the roller shell is rotatably mounted on the fixed center rod. Two rectangular sliders are provided and are respectively located at both ends of the fixed center rod. The fixed center rod slides with the horizontal guide rail through the rectangular sliders. The cleaning sleeve is fixedly mounted on the fixed center rod. Several cleaning plates are provided and are annularly fixed on the outer wall of the cleaning sleeve. The cleaning sleeve is located in the roller shell. The driving mechanism is transmission-connected to the end of the fixed center rod. The connecting ring is installed on the fixed center rod and is connected to the sewage pipe.

[0012] Preferably, the sewage pipeline is connected to the water pump, and the ends of the sewage pipeline are respectively connected to the two cross-flow filter units, and the ends of the sewage pipeline are connected to the connecting ring through the second corrugated pipe.

[0013] Preferably, the driving mechanism is provided with two groups and is respectively installed on two cross-flow filter units, the driving mechanism includes a second linear drive, a transmission push plate, a second push rod and a push transmission block, the push transmission block is fixedly installed on the fixed center rod, the push transmission block and the second push rod are each provided with two and are located at both ends of the fixed center rod, the second push rod is connected to the push transmission block in transmission, the second linear drive is fixedly installed on the support frame and is located at one end of the cross-flow filter unit, the output direction of the second linear drive is perpendicular to the length direction of the fixed center rod, the transmission push plate is horizontally arranged on the outside of the cross-flow filter unit and is consistent with the length direction of the fixed center rod, the output end of the second linear drive is fixedly connected to the transmission push plate, and the two ends of the transmission push plate are respectively fixedly connected to the two second push rods.

[0014] Preferably, a permanent magnet ring is fixedly mounted on the cleaning roller, and an arc-shaped electromagnet is fixedly mounted on the inner wall of the cross-flow filter unit. The arc-shaped electromagnet is located directly above the end of the horizontal guide rail away from the operating hole. An upward movement channel is provided at the end of the horizontal guide rail. A sliding track is vertically provided at the end of the second push rod away from the transmission push plate. A first transmission slider is provided in the sliding track, and the first transmission slider is connected to the push transmission block through a threaded column.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention adopts a double-layer cross-flow filter unit design, which expands the filtration area, makes the filtration flow rate significantly higher than that of traditional devices, and can treat more sewage. When treating the same amount of water, it reduces the floor space required for the equipment, improves space utilization efficiency, and reduces construction costs.

[0017] 2. The height of the swirling sand filter layer is relatively low, and the strength and water volume required for backwashing are greatly reduced, which reduces the water resources and energy consumption during the backwashing process. In addition, the service life of the filter material is extended, the frequency of filter material replacement is reduced, and the operating cost of the equipment is further reduced.

[0018] 3. The cross-flow water distribution mechanism and the rotary sand-assisted cleaning mechanism cooperate with each other, not only achieving efficient filtration, reducing the fouling cycle of the filter media, but also reducing the loss of filter media during backwashing. The cleaning roller can effectively clean the surface impurities of the rotary sand filter media, and the cleaning range covers the entire surface of the filter media, improving the stability and reliability of the filtration system, and reducing the workload of the operating personnel and the amount of filter media replenishment.

[0019] 4. Under the coordinated action of the locking device and the deflection drive device, the water distributor can flexibly adjust its position. When working normally, it can be stably set vertically to ensure uniform water distribution; when the rotary sand-assisted cleaning mechanism is working, it can automatically deflect and avoid interference with the cleaning roller, improving the equipment's ability to handle different working states.

[0020] 5. The structural design of the cleaning roller and the supporting drive mechanism achieve stable and precise horizontal movement of the cleaning roller, ensuring that the surface impurities of the rotary sand filter media can be comprehensively cleaned. At the end of the horizontal guide rail, through the cooperation of the permanent magnet ring and the arc-shaped electromagnet, the cleaning roller can automatically move upward to avoid colliding with other components. At the same time, the relevant transmission structure can ensure stable transmission between the drive mechanism and the cleaning roller, improving the cleaning effect and the safety of equipment operation. Description of the Drawings

[0021] Figure 1 is a schematic three-dimensional structure of a stacked cross-flow rotary sand filter Figure 1 ;

[0022] Figure 2 is a schematic three-dimensional structure of a stacked cross-flow rotary sand filter Figure 2 ;

[0023] Figure 3 is a front view of a stacked cross-flow rotary sand filter;

[0024] Figure 4 is a schematic three-dimensional structure of a stacked cross-flow rotary sand filter Figure 3 ;

[0025] Figure 5 is a schematic partial three-dimensional structure diagram of a stacked cross-flow rotary sand filter;

[0026] Figure 6 is Figure 5 's front view;

[0027] Figure 7 is a schematic three-dimensional structure diagram of the cross-flow water distribution mechanism and the rotary sand-assisted cleaning mechanism in a stacked cross-flow rotary sand filter;

[0028] Figure 8 is a schematic three-dimensional structure of the cross-flow water distribution mechanism in a stacked cross-flow rotary sand filterFigure 1 ;

[0029] Figure 9 is a schematic three - dimensional structure of the cross - flow water distribution mechanism in a stacked cross - flow sand - swirling filter Figure 2 ;

[0030] Figure 10 is an exploded three - dimensional view of the sand - swirling auxiliary cleaning mechanism in a stacked cross - flow sand - swirling filter;

[0031] Figure 11 is an exploded three - dimensional view of the cross - flow water distribution mechanism in a stacked cross - flow sand - swirling filter.

[0032] The reference numerals in the figure are:

[0033] 1. Support frame; 2. Cross - flow filtration unit; 3. Inlet pipeline; 4. Drainage pipeline; 5. Back - washing mechanism; 6. Sewage discharge pipeline; 7. Cross - flow water distribution mechanism; 8. Sand - swirling auxiliary cleaning mechanism; 9. Operation hole; 10. Water distributor; 11. Locking device; 12. Deflection drive device; 13. Water - retaining plate; 14. Cleaning roller; 15. Drive mechanism; 16. Horizontal guide rail; 17. Impurity removal gap; 18. Cleaning plate; 19. Water back - washing drainage pipeline; 20. Water back - washing inlet pipeline; 21. Air back - washing inlet pipeline; 22. Air back - washing exhaust pipeline; 23. First corrugated pipe; 24. Transmission seat; 25. Installation sleeve; 26. Sliding collar; 27. Transmission column; 28. Horizontal fixing plate; 29. Locking limit seat; 30. Metal elastic clamping plate; 31. Limiting plate; 32. Clamping groove; 33. First linear driver; 34. First push rod; 35. First articulated rod; 36. Hinge joint; 37. Threaded sleeve; 38. Fixed central rod; 39. Roller shell; 40. Connecting collar; 41. Rectangular slider; 42. Cleaning sleeve; 43. Second corrugated pipe; 44. Second linear driver; 45. Transmission push plate; 46. Second push rod; 47. Pushing transmission block; 48. Permanent magnet ring; 49. Arc electromagnet; 50. Upward movement channel; 51. Sliding track; 52. First transmission slider; 53. Sliding groove; 54. Second articulated rod; 55. Tension spring; 56. Second transmission slider. Detailed implementation manners

[0034] To further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation manners.

[0035] As shown in Figure 1 - Figure 11A stacked cross-flow sand-rotating filter shown in the figure includes a support frame 1, a cross-flow filtering unit 2, a water inlet pipeline 3, a drainage pipeline 4, a backwashing mechanism 5, a sewage discharge pipeline 6, a cross-flow water distribution mechanism 7, and a sand-rotating auxiliary cleaning mechanism 8. There are two cross-flow filtering units 2, which are respectively horizontally installed on the upper and lower layers of the support frame 1. Both cross-flow filtering units 2 are horizontal cylindrical cavities filled with sand-rotating filter media. An operation hole 9 is inclinedly opened on one side of the cross-flow filtering unit 2. The water inlet pipeline 3, the drainage pipeline 4, the sewage discharge pipeline 6, and the backwashing mechanism 5 are all internally communicated with the cross-flow filtering unit 2 through flanges. The cross-flow water distribution mechanism 7 includes a water distributor 10 connected to the end of the water inlet pipeline 3, a locking device 11, and a deflection driving device 12 that are drivingly connected to the water distributor 10. The water distributor 10 is vertically arranged, and a water retaining plate 13 flush with the top of the sand-rotating filter media is provided at the bottom of the water distributor 10. The sand-rotating auxiliary cleaning mechanism 8 includes a cleaning roller 14 that horizontally displaces along the surface layer of the sand-rotating filter media and a driving mechanism 15 that is drivingly connected to the cleaning roller 14. The cleaning roller 14 is connected to the sewage discharge pipeline 6. Horizontal guide rails 16 are horizontally provided on the side walls at both ends of the cross-flow filtering unit 2. Both ends of the cleaning roller 14 are slidably arranged on the horizontal guide rails 16. The length direction of the cleaning roller 14 is consistent with the length direction of the cross-flow filtering unit 2. Impurity removal gaps 17 with a gap smaller than the size of the sand-rotating filter media are opened on the cleaning roller 14. A cleaning plate 18 that rotates relative to the outer wall of the cleaning roller 14 is provided inside the cleaning roller 14.

[0036] When the equipment shown in the present invention is working, sewage flows in through the water inlet pipeline 3 and is evenly dispersed through the water distributor 10 of the cross-flow water distribution mechanism 7 into the sand-rotating filter media layers in the upper and lower cross-flow filtering units 2 for filtration. The filtered water is discharged from the drainage pipeline 4. During the filtration process, if impurities accumulate on the surface layer of the sand-rotating filter media, the driving mechanism 15 of the sand-rotating auxiliary cleaning mechanism 8 drives the cleaning roller 14 to horizontally displace along the surface layer of the sand-rotating filter media on the horizontal guide rails 16. The impurity removal gaps 17 on the cleaning roller 14 intercept the impurities, and the relatively rotating cleaning plate 18 inside sweeps the impurities to the position connected to the sewage discharge pipeline 6 for discharge, maintaining the cleanliness of the sand-rotating filter media. The water distributor 10 can be flexibly adjusted in position under the action of the locking device 11 and the deflection driving device 12, and remains vertically arranged in the normal working state to ensure uniform water distribution. When the sand-rotating auxiliary cleaning mechanism 8 is working, by adjusting the position of the water distributor 10, it is deflected to avoid the impurity removal operation on the surface of the sand-rotating filter media by the cleaning roller 14 in the sand-rotating auxiliary cleaning mechanism 8 and prevent interference. When backwashing is required, the backwashing mechanism 5 is started to wash the filter media, and the sewage and impurities generated by the washing are discharged through the sewage discharge pipeline 6.

[0037] On the one hand, the double-layer cross-flow filtration unit 2 is designed to increase the filtration area, with a higher filtration flow rate than traditional devices, enabling it to handle more sewage while reducing the floor area of the equipment. On the other hand, the lower height of the swirling sand filter layer reduces the backwashing intensity and water demand, thereby reducing the operating cost. In addition, the cross-flow water distribution mechanism 7 cooperates with the swirling sand auxiliary cleaning mechanism 8, not only achieving efficient filtration, reducing the fouling cycle of the filter media, but also reducing the loss of filter media during backwashing, decreasing the workload of operating personnel and the amount of filter media replenishment, and enhancing the overall operating efficiency and economy of the equipment.

[0038] The backwashing mechanism 5 includes a water backwashing drainage pipeline 19, a water backwashing inlet pipeline 20, an air backwashing inlet pipeline 21, and an air backwashing exhaust pipeline 22, all of which are internally connected to the two cross-flow filtration units 2.

[0039] During the backwashing operation of the swirling sand filter, the water backwashing inlet pipeline 20 injects backwashing water into the cross-flow filtration unit 2. The water flow flushes the swirling sand filter media, dispersing the impurities attached to the filter media. These waters containing impurities are then discharged from the cross-flow filtration unit 2 through the water backwashing drainage pipeline 19. At the same time, the air backwashing inlet pipeline 21 introduces compressed air into the filtration unit. The compressed air forms bubbles in the filter media layer. During the rising process of the bubbles, the swirling sand filter media is disturbed, making it easier for the impurities between the swirling sand filter media to fall off. The air backwashing exhaust pipeline 22 is used to discharge the excess gas generated during backwashing, ensuring the smooth progress of the backwashing process. The air washing and water washing cooperate with each other to more effectively clean the swirling sand filter media. Compared with the single water washing backwashing method, the air-water combined backwashing can more thoroughly remove the impurities on the filter media, greatly improving the backwashing effect. This enables the filtration performance of the swirling sand filter media to be quickly restored, extends the service life of the filter media, reduces the replacement frequency of the filter media, and thus reduces the operating cost of the equipment. At the same time, the efficient backwashing can also ensure the continuous and stable operation of the filter, maintain a high filtration efficiency, and ensure that the filtered water quality meets the standards.

[0040] The water distributor 10 is communicated with the water inlet end of the water inlet pipeline 3 through the first corrugated pipe 23. A driving seat 24 is fixedly installed at the top of the water distributor 10. An installation sleeve 25 is sleeved on the first corrugated pipe 23. The top of the installation sleeve 25 is fixedly connected with the inner wall of the cross-flow filtering unit 2. A sliding collar 26 is fixedly installed at the bottom of the installation sleeve 25. The deflection driving device 12 includes a driving column 27 that slides horizontally. The driving column 27 is slidably matched with the sliding collar 26. The sliding direction of the driving column 27 is perpendicular to the length direction of the cross-flow filtering unit 2. One end of the driving column 27 is hinged to the driving seat 24. The locking device 11 is clamped with the driving seat 24. A sliding groove 53 is horizontally arranged on the side of the installation sleeve 25. The length direction of the sliding groove 53 is consistent with the length direction of the driving column 27. A tension spring 55 and a first driving slider 56 are arranged in the sliding groove 53. The tension spring 55 is located at one end of the first driving slider 56 close to the driving seat 24. The two ends of the tension spring 55 are respectively fixedly connected with the side wall of the sliding groove 53 and the first driving slider 56. The deflection driving device 12 further includes a second hinge rod 54. The two ends of the second hinge rod 54 are respectively hinged to the driving seat 24 and the first driving slider 56.

[0041] During operation, sewage flows in from the water inlet pipe 3 and is transported to the water distributor 10 through the first bellows 23. The first bellows 23 can be flexibly bent so that the water distributor 10 can move within a certain range (the position changes of the hinges of the transmission column 27 and the transmission seat 24 and the hinges of the second hinge rod 54 and the transmission seat 24 drive the water distributor 10 to adjust its position and angle). The transmission seat 24 at the top of the water distributor 10 is used to support the water distributor 10 and support the water distributor 10 for position adjustment. The mounting sleeve 25 is fixed to the inner wall of the cross-flow filter unit 2 to play a supporting and positioning role. It is mounted on the first bellows 23 to protect the first bellows 23 and enhance its stability. The sliding collar 26 is installed at the bottom of the installation sleeve 25 and slides with the transmission column 27. When the position of the water distributor 10 needs to be adjusted, the transmission column 27 of the deflection drive device 12 slides in the horizontal direction. Since one end of the transmission column 27 is hinged to the transmission seat 24, and the sliding direction is perpendicular to the length direction of the cross-flow filter unit 2, the sliding of the transmission column 27 will drive the transmission seat 24. As the transmission column 27 continues to slide, the water distributor 10 is extended forward (the tension spring 55 first pulls the water distributor 10 horizontally outward through the tension force and the limiting effect of the locking device 11, so that it is released from the locking relationship with the locking device 11). At this time, the transmission column 27 continues to be driven to move forward. Due to the connection of the first bellows 23 and the connection and limiting function of the second hinged rod 54, the water distributor 10 deflects upward during the forward extension process, so that its bottom is separated from the surface of the swirling sand filter material, achieving an avoidance effect and realizing the adjustment of the water distribution angle. When resetting, the transmission seat 24 is first deflected to a nearly horizontal state, and the end of the transmission seat 24 contacts the locking device 11. The limiting function of the locking device 11 ensures that the transmission seat 24 can only move horizontally during the subsequent displacement process. When the subsequent transmission column 27 continues to retract, it will drive the transmission seat 24 and the water distributor 10 to move horizontally as a whole, and then drive the second hinged rod 54 and the first transmission slider 56 to pull the tension spring 55, thereby realizing the reset function. The locking device 11 is engaged with the transmission seat 24. When the water distributor 10 is in a vertical state, the locking device 11 can limit and lock the water distributor 10 to ensure that it distributes water stably during the filtration process.

[0042] The locking device 11 includes a horizontal fixing plate 28, a locking limit seat 29 and a metal elastic clamping plate 30. A limit plate 31 that cooperates with the metal elastic clamping plate 30 is vertically provided at the top of the transmission seat 24. The horizontal fixing plate 28 is fixedly installed on the inner wall of the cross-flow filter unit 2. The locking limit seat 29 is fixedly installed on one side of the horizontal fixing plate 28 close to the transmission seat 24. The locking limit seat 29 is provided with a clamping groove 32 for clamping the bottom plate of the transmission seat 24.

[0043] The water distribution state when the water distributor 10 is working properly is the vertical state. At this time, the locking device 11 comes into play. The horizontal fixing plate 28 is fixedly installed on the inner wall of the cross-flow filtration unit 2, providing a support foundation for the entire locking device 11. The clamping groove 32 on the locking limit seat 29 is accurately clamped with the bottom plate of the transmission seat 24. At the same time, the limiting plate 31 vertically arranged at the top of the transmission seat 24 is in close contact and cooperation with the metal elastic clamping plate 30. When the metal elastic clamping plate 30 is squeezed by the limiting plate 31, it generates elastic deformation and tightly presses the limiting plate 31 by its own elastic force, thereby firmly locking the water distributor 10, ensuring that the water distributor 10 stably performs the water distribution operation during the filtration process, ensuring that the sewage can evenly pass through the swirling sand filter layer, and improving the filtration efficiency and quality. When unlocking, the transmission seat 24 is directly driven to be pushed forward, overcoming the elastic force of the metal elastic clamping plate 30 so that the limiting plate 31 can be disengaged from the contact connection with the metal elastic clamping plate 30. At the same time, the connection between the transmission seat 24 and the clamping groove 32 can also be disengaged, thereby realizing the unlocking function. When resetting, the transmission seat 24 retracts and first contacts the bottom of the clamping groove 32 to limit the transmission seat 24 and make it return to the horizontal state again.

[0044] The stable locking structure ensures the stability of the water distributor 10 during the water distribution process, avoids uneven water distribution caused by the shaking of the water distributor 10, and effectively improves the filtration effect. On the other hand, the design of being able to deflect and avoid improves the ability of the equipment to cope with emergencies or special operation requirements, and enhances the adaptability and flexibility of the equipment. At the same time, the structure of the locking device 11 is not only easy to install and maintain, but also reduces the overall cost of the equipment, and improves the practicability and economy of the equipment.

[0045] The deflection driving device 12 further includes a first linear driver 33, a first push rod 34, a first hinge rod 35 and a hinge head 36. The first linear driver 33 is fixedly installed on the support frame 1 and is located at one end of the cross-flow filtration unit 2. The first push rod 34 is horizontally arranged inside the cross-flow filtration unit 2. The length direction of the first push rod 34 is the same as the length direction of the cross-flow filtration unit 2. The output end of the first linear driver 33 is fixedly connected to the first push rod 34. One end of the first hinge rod 35 is hinged to the first push rod 34, and the other end of the first hinge rod 35 is hinged to the hinge head 36. The hinge head 36 is fixedly connected to the end of the transmission column 27 away from the transmission seat 24.

[0046] When the cross-flow high-flow rate swirl sand filter is in operation, when the water distributor 10 needs to perform an evasive action, the first linear actuator 33 installed on the support frame 1 and located at one end of the cross-flow filter unit 2 is started. The output end of the first linear actuator 33 pushes the first push rod 34 fixedly connected thereto. Since the first push rod 34 is arranged horizontally and its length direction is consistent with the cross-flow filter unit 2, it will make a linear motion along the length direction of the cross-flow filter unit 2. When the first push rod 34 moves, the first hinged rod 35 hinged thereto will move accordingly. The other end of the first hinged rod 35 is connected to the end of the transmission column 27 away from the transmission seat 24 through the hinge joint 36. The swing of the first hinged rod 35 drives the transmission column 27 to slide in the horizontal direction. The transmission column 27 is slidably matched with the sliding collar 26 at the bottom of the mounting sleeve 25, and one end is hinged to the transmission seat 24. The sliding of the transmission column 27 causes the transmission seat 24 to be displaced, thereby driving the water distributor 10 to extend forward. Because the water distributor 10 is connected to the water inlet pipe 3 through the first corrugated pipe 23, and the first corrugated pipe 23 is flexible, the water distributor 10 deflects upward during the extension process, and the bottom is separated from the surface layer of the swirling sand filter material, completing the avoidance action. When the avoidance is completed, the first linear drive 33 runs in the reverse direction, driving each component to reset, so that the water distributor 10 returns to the vertical water distribution state and is locked by the locking device 11.

[0047] A threaded sleeve 37 is rotatably provided on the hinge head 36 , and an outer wall of one end of the transmission column 27 close to the hinge head 36 is provided with an external thread, and the transmission column 27 is threadedly connected to the hinge head 36 through the threaded sleeve 37 .

[0048] The above design facilitates the installation process of the transmission column 27 , thereby ensuring stable installation and transmission of the deflection drive device 12 .

[0049] The cleaning roller 14 is composed of a fixed center rod 38, a roller shell 39, a connecting ring 40, a rectangular slider 41 and a cleaning sleeve 42. The fixed center rod 38 and the roller shell 39 are coaxially arranged, and the roller shell 39 is rotatably mounted on the fixed center rod 38. Two rectangular sliders 41 are provided and are respectively located at both ends of the fixed center rod 38. The fixed center rod 38 is slidably matched with the horizontal guide rail 16 through the rectangular slider 41. The cleaning sleeve 42 is fixedly installed on the fixed center rod 38. A plurality of cleaning plates 18 are provided and are annularly fixedly installed on the outer wall of the cleaning sleeve 42. The cleaning sleeve 42 is located in the roller shell 39. The driving mechanism 15 is transmission-connected to the end of the fixed center rod 38. The connecting ring 40 is installed on the fixed center rod 38 and is connected to the sewage pipe 6.

[0050] When the rotary sand filter is in operation, the cleaning roller 14 is used to clean the surface impurities of the rotary sand filter media. The driving mechanism 15 drives the end of the fixed central rod 38 to rotate. Since the rectangular slider 41 is slidably engaged with the horizontal guide rail 16, the fixed central rod 38 can horizontally displace along the horizontal guide rail 16 within the cross-flow filtration unit 2. When the fixed central rod 38 rotates, it drives the cleaning sleeve 42 fixedly installed thereon to rotate synchronously, and several cleaning plates 18 annularly distributed on the outer side wall of the cleaning sleeve 42 rotate accordingly. The roller housing 39 is rotatably installed on the fixed central rod 38, and during the movement of the fixed central rod 38, the roller housing 39 also moves along the surface of the rotary sand filter media. The impurities on the surface of the rotary sand filter media enter the interior of the roller housing 39 through the impurity removal gap 17 smaller than the size of the rotary sand on the cleaning roller 14. With the rotation of the cleaning plates 18, the impurities are swept to the connecting collar 40 and then discharged into the sewage pipeline 6 through the connecting collar 40.

[0051] Through the coordinated operation of the fixed central rod 38, the roller housing 39, the cleaning sleeve 42 and the cleaning plates 18, the efficient cleaning of the surface impurities of the rotary sand filter media is realized, the filtration performance of the rotary sand filter media is maintained, the service life of the rotary sand filter media is prolonged, the replacement frequency of the rotary sand filter media is reduced, and the operation cost is lowered. Secondly, the design of the sliding fit between the cleaning roller 14 and the horizontal guide rail 16 enables its cleaning range to cover the entire surface of the rotary sand filter media within the cross-flow filtration unit 2, with more comprehensive and dead-angle-free cleaning, improving the cleaning effect.

[0052] The sewage pipeline 6 is connected to the water pump, and the ends of the sewage pipeline 6 are respectively connected to the two cross-flow filtration units 2. The end of the sewage pipeline 6 is connected to the connecting collar 40 through the second corrugated pipe 43.

[0053] There are two sets of driving mechanisms 15, which are respectively installed on the two cross-flow filtration units 2. The driving mechanism 15 includes a second linear driver 44, a transmission push plate 45, a second push rod 46 and a push transmission block 47. The push transmission block 47 is fixedly installed on the fixed central rod 38. There are two push transmission blocks 47 and two second push rods 46, which are located at both ends of the fixed central rod 38. The second push rod 46 is in transmission connection with the push transmission block 47. The second linear driver 44 is fixedly installed on the support frame 1 and is located at one end of the cross-flow filtration unit 2. The output direction of the second linear driver 44 is perpendicular to the length direction of the fixed central rod 38. The transmission push plate 45 is horizontally arranged outside the cross-flow filtration unit 2 and is consistent with the length direction of the fixed central rod 38. The output end of the second linear driver 44 is fixedly connected to the transmission push plate 45, and both ends of the transmission push plate 45 are respectively fixedly connected to the two second push rods 46.

[0054] During the operation of the cross-flow high-flow-rate sand-rotating filter, when it is necessary to start the sand-rotating auxiliary cleaning mechanism 8, the two sets of driving mechanisms 15 start working on the corresponding cross-flow filtering units 2 respectively. Taking one set of driving mechanisms 15 as an example, the second linear driver 44 installed on the support frame 1 and located at one end of the cross-flow filtering unit 2 is activated. Since the output direction of the second linear driver 44 is perpendicular to the length direction of the fixed central rod 38, the output end of the second linear driver 44 pushes the transmission push plate 45 fixedly connected thereto to move horizontally. The two ends of the transmission push plate 45 are respectively fixedly connected to two second push rods 46. Therefore, the second push rods 46 will move synchronously with the transmission push plate 45. The movement of the second push rods 46 will drive the pushing transmission block 47, thereby causing the fixed central rod 38 to horizontally displace within the cross-flow filtering unit 2 along the horizontal guide rail 16. As the fixed central rod 38 moves, the cleaning roller 14 moves synchronously along the surface layer of the sand-rotating filter material, cleaning the impurities on the surface layer of the sand-rotating filter material. The cleaned impurities enter the interior through the impurity removal gap 17 of the cleaning roller 14, and then are swept to the connecting collar 40 by the cleaning plate 18 and discharged through the sewage pipeline 6 under the action of the water pump.

[0055] Through the coordinated work of the second linear driver 44, the transmission push plate 45, the second push rods 46 and the pushing transmission block 47, the stable and precise horizontal movement of the cleaning roller 14 is achieved, ensuring that the cleaning roller 14 can evenly cover the surface layer of the sand-rotating filter material, clean the impurities without omission, and improve the cleaning effect.

[0056] A permanent magnet ring 48 is fixedly installed on the cleaning roller 14, and an arc-shaped electromagnet 49 is fixedly installed on the inner wall of the cross-flow filtering unit 2. The arc-shaped electromagnet 49 is located directly above the end of the horizontal guide rail 16 far from the operation hole 9. An upward movement channel 50 is provided at the end of the horizontal guide rail 16. A sliding track 51 is vertically provided at the end of the second push rod 46 far from the transmission push plate 45. A first transmission slider 52 is provided in the sliding track 51. The first transmission slider 52 is connected to the pushing transmission block 47 through a threaded column.

[0057] During the operation of the cross-flow high-flow rate rotary sand filter, the cleaning operation of the material cleaning roller 14 has a more refined control method. When the material cleaning roller 14 moves along the fixed central rod 38 to a position close to the end of the horizontal guide rail 16, the arc-shaped electromagnet 49 installed on the inner wall of the cross-flow filtration unit 2, directly above the end of the horizontal guide rail 16 far from the operation hole 9, is energized and starts. At this time, the permanent magnet ring 48 fixedly installed on the material cleaning roller 14 will be attracted by the magnetic force of the arc-shaped electromagnet 49. Since an upward movement channel 50 is provided at the end of the horizontal guide rail 16, the material cleaning roller 14 will gradually lift upward under the action of the magnetic force. During normal sewage treatment, the material cleaning roller 14 is lifted upward to avoid being in the position on the filter material surface, so as to improve the stability of water distribution and avoid the influence of the material cleaning roller 14 on water distribution (it is worth mentioning that buffer pads are provided at both the top and bottom ends of the upward movement channel 50 to protect the stability of the overall material cleaning roller 14 and prevent damage to the material cleaning roller 14 when moving upward in place or falling, and during the upward and downward movement processes, the second linear driver 44 does not drive).

[0058] The sliding track 51 vertically provided at one end of the second push rod 46 away from the transmission push plate 45 and the first transmission slider 52 come into play. As the material cleaning roller 14 moves upward, the first transmission slider 52 slides upward in the sliding track 51. The first transmission slider 52 connected to the pushing transmission block 47 through a threaded column will drive the pushing transmission block 47 to make fine adjustments during the upward sliding process to adapt to the position change brought about by the upward movement of the material cleaning roller 14 and ensure the stability of the transmission between the drive mechanism 15 and the material cleaning roller 14.

[0059] The above embodiments only represent one or several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A stacked cross-flow rotary sand filter, characterized in that, The utility model comprises a support frame, a cross-flow filter unit, a water inlet pipe, a drainage pipe, a backwash mechanism, a sewage pipe, a cross-flow water distribution mechanism and a swirling sand auxiliary cleaning mechanism. The cross-flow filter unit is provided with two and is horizontally installed on the upper and lower layers of the support frame respectively. The two cross-flow filter units are both horizontal cylindrical cavities filled with swirling sand filter materials. An operation hole is inclinedly opened on one side of the cross-flow filter unit. The water inlet pipe, the drainage pipe, the sewage pipe and the backwash mechanism are all connected to the inside of the cross-flow filter unit through a flange. The cross-flow water distribution mechanism comprises a water distributor connected to the end of the water inlet pipe and a locking device and a deflection device connected to the water distributor by transmission. The driving device is a vertically arranged water distributor and a water retaining plate is provided at the bottom of the water distributor and is flush with the top of the swirling sand filter material. The swirling sand auxiliary cleaning mechanism includes a cleaning roller that is horizontally displaced against the surface of the swirling sand filter material and a driving mechanism that is transmission-connected to the cleaning roller. The cleaning roller is connected to the sewage discharge pipeline. Horizontal guide rails are provided horizontally on the side walls at both ends of the cross-flow filter unit. Both ends of the cleaning roller are slidingly arranged on the horizontal guide rails. The length direction of the cleaning roller is consistent with the length direction of the cross-flow filter unit. A debris removal gap with a gap smaller than the size of the swirling sand filter material is provided on the cleaning roller. A cleaning plate that rotates relative to the outer wall of the cleaning roller is provided inside the cleaning roller. The water distributor is connected to the water inlet end of the water inlet pipeline through a first bellows, a transmission seat is fixedly installed on the top of the water distributor, a mounting sleeve is sleeved on the first bellows, the top of the mounting sleeve is fixedly connected to the inner wall of the cross-flow filter unit, a sliding collar is fixedly installed on the bottom of the mounting sleeve, the deflection drive device includes a horizontally sliding transmission column, the transmission column and the sliding collar are slidably matched, the sliding direction of the transmission column is perpendicular to the length direction of the cross-flow filter unit, one end of the transmission column is hinged to the transmission seat, the locking device is clamped with the transmission seat, a sliding groove is horizontally provided on the side of the mounting sleeve, the length direction of the sliding groove is consistent with the length direction of the transmission column, a tension spring and a second transmission slider are provided in the sliding groove, the tension spring is located at one end of the second transmission slider close to the transmission seat, and the two ends of the tension spring are respectively fixedly connected to the side walls of the sliding groove and the second transmission slider, the deflection drive device also includes a second hinged rod, and the two ends of the second hinged rod are respectively hinged to the transmission seat and the second transmission slider; The locking device includes a horizontal fixed plate, a locking limit seat and a metal elastic clamping plate. A limit plate that cooperates with the metal elastic clamping plate is vertically provided at the top of the transmission seat. The horizontal fixed plate is fixedly installed on the inner wall of the cross-flow filter unit. The locking limit seat is fixedly installed on the side of the horizontal fixed plate close to the transmission seat. The locking limit seat is provided with a clamping groove for clamping the bottom plate of the transmission seat.

2. The stacked cross-flow sand-rotating filter according to claim 1, wherein The backwash mechanism comprises a water backwash drainage pipeline, a water backwash water inlet pipeline, an air backwash air inlet pipeline and an air backwash exhaust pipeline, all of which are connected to the inside of the two cross-flow filter units.

3. A stacked cross-flow rotary sand filter according to claim 1, wherein, The deflection drive device also includes a first linear drive, a first push rod, a first hinged rod and a hinge joint. The first linear drive is fixedly mounted on the support frame and is located at one end of the cross-flow filter unit. The first push rod is horizontally arranged inside the cross-flow filter unit. The length direction of the first push rod is consistent with the length direction of the cross-flow filter unit. The output end of the first linear drive is fixedly connected to the first push rod, one end of the first hinged rod is hinged to the first push rod, the other end of the first hinged rod is hinged to the hinge joint, and the hinge joint is fixedly connected to one end of the transmission column away from the transmission seat.

4. A stacked cross-flow rotary sand filter according to claim 3, characterized in that, A threaded sleeve is rotatably arranged on the hinge head, an outer wall of one end of the transmission column close to the hinge head is provided with an external thread, and the transmission column is threadedly connected with the hinge head through the threaded sleeve.

5. A stacked cross-flow sand-rotating filter according to claim 1, characterized in that, The cleaning roller is composed of a fixed center rod, a roller shell, a connecting ring, a rectangular slider and a cleaning sleeve. The fixed center rod and the roller shell are coaxially arranged, and the roller shell is rotatably mounted on the fixed center rod. Two rectangular sliders are provided and are respectively located at both ends of the fixed center rod. The fixed center rod slides with the horizontal guide rail through the rectangular slider. The cleaning sleeve is fixedly installed on the fixed center rod. Several cleaning plates are provided and are annularly fixed on the outer wall of the cleaning sleeve. The cleaning sleeve is located in the roller shell. The driving mechanism is transmission-connected to the end of the fixed center rod. The connecting ring is installed on the fixed center rod and is connected to the sewage pipe.

6. A stacked cross-flow rotary sand filter according to claim 5, wherein, The sewage discharge pipeline is connected to the water pump, and the ends of the sewage discharge pipeline are respectively connected to the two cross-flow filter units, and the ends of the sewage discharge pipeline are connected to the connecting ring through the second corrugated pipe.

7. The stacked cross-flow sand-rotating filter according to claim 6, characterized in that, The driving mechanism is provided with two groups and is respectively installed on two cross-flow filter units. The driving mechanism includes a second linear driver, a transmission push plate, a second push rod and a push transmission block. The push transmission block is fixedly installed on the fixed center rod. Two push transmission blocks and second push rods are provided and are located at both ends of the fixed center rod. The second push rod is connected to the push transmission block in transmission. The second linear driver is fixedly installed on the support frame and is located at one end of the cross-flow filter unit. The output direction of the second linear driver is perpendicular to the length direction of the fixed center rod. The transmission push plate is horizontally arranged on the outside of the cross-flow filter unit and is consistent with the length direction of the fixed center rod. The output end of the second linear driver is fixedly connected to the transmission push plate, and the two ends of the transmission push plate are respectively fixedly connected to the two second push rods.

8. A stacked cross-flow rotary sand filter according to claim 7, characterized in that, A permanent magnet ring is fixedly installed on the cleaning roller, and an arc-shaped electromagnet is fixedly installed on the inner wall of the cross-flow filter unit. The arc-shaped electromagnet is located directly above the end of the horizontal guide rail away from the operating hole. An upward movement channel is provided at the end of the horizontal guide rail. A sliding track is vertically provided at the end of the second push rod away from the transmission push plate. A first transmission slider is provided in the sliding track, and the first transmission slider is connected to the push transmission block through a threaded column.

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