A circulating multi-stage sewage treatment device

Abstract

The application relates to the technical field of sewage circulation and discloses a circulating multistage sewage treatment equipment which comprises a support frame, a pipeline and a sleeve disc fixedly connected in the support frame, a filter disc rotatably connected in the sleeve disc, a cleaning piece arranged in the sleeve disc, an extruding piece arranged in the pipeline, a mounting shell fixedly connected to the top of the support frame, and a transmission piece comprising an initial position and a set position; when the extruding piece extrudes the transmission piece to move from the initial position to the set position, the filter disc rotates. The sewage is filtered through the overlapping area of the filter disc and the pipeline; when the overlapping area is blocked, the extruding piece can make the transmission piece drive the filter disc to rotate, thereby avoiding engineering delay caused by water shortage, effectively maintaining high filtering efficiency, making the treated water quality meet the use standard, and reducing the sewage backlog problem caused by low treatment efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of wastewater recycling, and more particularly to a circulating multi-stage wastewater treatment device. Background Technology

[0002] Wastewater first flows into the pretreatment zone, where a screen is installed to intercept larger floating and suspended solids. Then, the wastewater enters the sedimentation zone, where gravity settling is used to further settle suspended solids to the bottom of the treatment tank. Wastewater flowing out of the sedimentation zone then enters the filtration zone, which uses multi-layer filter media to filter out fine particulate matter remaining in the wastewater.

[0003] However, in existing technologies, the cleaning of filter cartridges in wastewater recycling treatment tanks mainly involves manual or backwashing methods. Manual cleaning has obvious drawbacks, requiring a significant amount of time to disassemble and reassemble the device. Furthermore, due to human factors, it is difficult to guarantee timely maintenance, which negatively impacts the stability and lifespan of the device, directly reducing its reliable operating time. In practical use, it cannot meet the demands for efficient and stable treatment. Therefore, most devices employ automated backwashing technology. This technology effectively cleans the filter cartridge by stripping and discharging impurities accumulated on the inner surface of the filter cartridge through reverse water flow. However, the water production and filtration function must be paused during backwashing, causing an interruption in wastewater filtration and severely affecting the overall efficiency and continuity of the treatment process. To address this issue, some manufacturers have adopted a dual-pipe system, i.e., two pipelines... One approach to filtration is to temporarily shut down the system for cleaning after a pipe becomes clogged. However, this significantly increases costs, requiring additional equipment and a more complex control system. Furthermore, the performance of the two water treatment systems often differs, leading to inconsistent wastewater purification results. Closing one pipe also disrupts the continuity of the overall filtration process. To compensate for these shortcomings, another solution is to use a scraper to clean the filter cartridge surface in real time. This method continuously removes impurities from the filter cartridge surface during operation, partially solving the problem of backwashing not being able to provide real-time maintenance. However, in practical applications, many impurities are located inside the filter cartridge, making it difficult to effectively clean them using only a scraper. Moreover, because the filter cartridge is constantly in operation, impurity particles accumulate, preventing the cartridge from being thoroughly cleaned.

[0004] Therefore, a circulating multi-stage sewage treatment device is proposed, which can ensure continuous filtration efficiency and the cleanliness of the filter element. Summary of the Invention

[0005] The purpose of this invention is to provide a circulating multi-stage sewage treatment device to solve the problem of filter cleaning affecting the filtration of the device.

[0006] The technical solution of the present invention is as follows: a circulating multi-stage sewage treatment device, including a support frame, a pipeline and a sleeve plate fixedly connected inside the support frame, a filter disc rotatably connected inside the sleeve plate, a cleaning component disposed inside the sleeve plate, a pressing component disposed inside the pipeline, a mounting shell fixedly connected to the top of the support frame, a transmission component disposed inside the mounting shell, a driving component rotatably connected inside the sleeve plate, a servo motor fixedly connected inside the mounting shell, a gear shaft fixedly connected to the output end of the servo motor, a transmission belt sleeved between the gear shaft and the driving component, and a cleaning device disposed on one side of the support frame. The pipeline is in contact with the sleeve plate, one side of the filter disc is in contact with one side of the sleeve plate, and the other side of the sleeve plate is in contact with the pipeline. The transmission component meshes with the gear shaft, and the cleaning component is connected to the cleaning device. The transmission component includes an initial position and a set position. When the pressing component presses the transmission component from the initial position to the set position, the filter disc rotates.

[0007] Furthermore, a waste storage area is provided at the bottom of the pipeline, a compression area is provided at the top of the pipeline, a square tube is provided on one side of the sleeve, a closed shell is provided at the bottom of the sleeve, the closed shell is interconnected with the waste storage area, and the extrusion component is located inside the compression area.

[0008] Furthermore, the transmission component includes a rotating shaft rotatably connected inside the mounting housing, a spur gear fixedly connected outside the rotating shaft, a synchronizing gear slidably connected outside one end of the rotating shaft, and a pressure-bearing component sleeved outside the synchronizing gear. One end of the rotating shaft is a synchronizing wheel, and the interior of the synchronizing gear meshes with the synchronizing wheel.

[0009] Furthermore, a connecting shaft is provided on one side of the filter disc, and a driven gear is provided on the outside of the connecting shaft near the end of the pressure-bearing component. When the pressure-bearing component is in the set position, the driven gear meshes with the synchronous gear, and the gear transmission ratio between the gear shaft and the spur gear is four to one.

[0010] Furthermore, a sleeve is fixedly connected to the top of the mounting housing, one end of the driving component is rotatably connected inside the sleeve, a support rod is provided inside the mounting housing, the pressure-bearing component includes a paddle sleeve slidably connected to the outside of the support rod, a connecting rod connected to the bottom of the paddle sleeve, and an arc block connected to one side of the connecting rod, the synchronous gear is rotatably connected inside the paddle sleeve, a return spring is connected between the support rod and the paddle sleeve, and the arc block is located inside the compression zone.

[0011] Furthermore, the extrusion member includes a spring telescopic rod connected inside the compression zone, a square plate connected to the bottom end of the spring telescopic rod, and an arc-shaped block fixedly connected to the top of the square plate, the arc-shaped block being located below the arc-shaped block.

[0012] Furthermore, the driving component includes a circular shaft rotatably connected inside the square tube, a disc fixedly connected to one end of the circular shaft, and a protrusion disposed on the side of the disc near the cleaning component. The circular shaft is located above the gear shaft, the protrusion is not concentric with the disc, the circular shaft is located directly above the connecting tube, and the spur gear is concentric with the connecting shaft.

[0013] Furthermore, the cleaning component includes a connecting pipe disposed inside the sleeve, a flushing device rotatably connected to the outside of the connecting pipe, an inner groove strip fixedly connected to one side of the flushing device, and scrapers fixedly connected to both sides of the flushing device. The connecting pipe is interconnected with the flushing device and connected to the cleaning equipment. The protrusion is located inside the inner groove strip.

[0014] Furthermore, the top of the arc-shaped block is provided with an arc groove. When the arc block is in the initial position, the arc-shaped block does not contact the arc block. When the arc block is in the set position, the connecting rod is located inside the arc groove.

[0015] Furthermore, the filter disc is divided into an inner disc, a filter ring, and an outer ring, and the vertical distance from the inner diameter to the outer diameter of the filter ring is less than the diameter of the pipeline.

[0016] The beneficial effects of this invention are: 1. Wastewater is filtered through the overlapping area of ​​the filter disc and the pipeline. When the overlapping area of ​​the filter disc and the pipeline becomes clogged, the squeezing component causes the transmission component to rotate the filter disc, thereby automatically switching the clogged area of ​​the filter disc. This effectively ensures continuous filtration efficiency. The clogged filter disc is cleaned separately using the cleaning component, without interruption due to filter disc cleaning. This greatly improves construction efficiency, avoids project delays caused by water shortage, effectively maintains high filtration efficiency, ensures that the treated water quality meets the usage standards, and reduces the problem of wastewater backlog caused by low treatment efficiency.

[0017] 2. During the cleaning of the filter disc, the clogged area of ​​the filter disc will be in a stagnant state, allowing the cleaning device to effectively clean the filter disc for a long time. This ensures that the filter disc is effectively cleaned, eliminating the need for frequent manual disassembly and reassembly, saving a lot of labor and time costs. At the same time, it achieves continuous filtration and filter element cleaning in a relatively simple and efficient way, effectively removing various impurities in wastewater and ensuring stable water quality after treatment.

[0018] 3. When the filter disc becomes clogged, the wastewater impacts the compression zone, causing the extruder to rise rapidly and rotate the filter disc. This effectively prevents further clogging and avoids a sharp drop in filtration efficiency due to excessive clogging. It also prevents damage to the filter disc and other equipment components caused by prolonged high-load operation, maintaining stable filtration capacity and ensuring the entire filtration equipment operates reliably. This provides continuous and stable support for the recycling of wastewater from construction projects. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram from a first perspective of the present invention; Figure 2 This is a top view of the overall structure of the present invention; Figure 3 For the present invention Figure 2 Sectional view at point AA; Figure 4 For the present invention Figure 3 Enlarged view of point B in the middle; Figure 5 For the present invention Figure 3 Enlarged view of point C in the middle; Figure 6 This is a schematic diagram of the structure of the filter disc of the present invention; Figure 7 This is a schematic diagram of the structure of the driving component of the present invention; Figure 8 For the present invention Figure 6 Enlarged view of point D in the middle; Figure 9 This is a cross-sectional view of the overall structure of the present invention.

[0020] In the picture: 1. Support frame; 2. Piping; 21. Waste storage area; 22. Compression area; 3. Sleeve disc; 31. Square tube; 32. Enclosed shell; 4. Filter disc; 401. Inner disc; 402. Filter ring; 403. Outer ring; 41. Connecting shaft; 42. Driven gear; 5. Cleaning component; 51. Connecting pipe; 52. Flushing device; 53. Inner groove bar; 54. Scraper; 6. Extrusion component; 61. Spring telescopic rod; 62. Square plate; 63. Arc-shaped block; 631. 7. Arc groove; 8. Mounting housing; 701. Support rod; 702. Return spring; 71. Sleeve; 8. Transmission component; 81. Rotating shaft; 811. Synchronous pulley; 82. Spur gear; 83. Synchronous gear; 84. Pressure-bearing component; 841. Gear sleeve; 842. Connecting rod; 843. Arc block; 9. Driving component; 91. Round shaft; 92. Round disc; 93. Protrusion; 10. Servo motor; 11. Gear shaft; 12. Transmission belt; 13. Cleaning equipment. Detailed Implementation

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] Reference Figure 1-9 This invention provides a circulating multi-stage sewage treatment device, including a support frame 1, a pipe 2 and a sleeve 3 fixedly connected inside the support frame 1, a filter disc 4 rotatably connected inside the sleeve 3, a cleaning component 5 disposed inside the sleeve 3, an extrusion component 6 disposed inside the pipe 2, a mounting shell 7 fixedly connected to the top of the support frame 1, a transmission component 8 disposed inside the mounting shell 7, a drive component 9 rotatably connected inside the sleeve 3, a servo motor 10 fixedly connected inside the mounting shell 7, a gear shaft 11 fixedly connected to the output end of the servo motor 10, and a sleeve on the gear shaft 11. The transmission belt 12 between the drive component 9 and the cleaning device 13 is set on one side of the support frame 1. The pipe 2 is attached to the sleeve 3, one side of the filter disc 4 is attached to one side of the sleeve 3, and the other side of the sleeve 3 is attached to the pipe 2, thereby preventing sewage that has not passed through the filter disc 4 from passing through the gap between the pipe 2 and the filter disc 4 to reach the lower process, ensuring that the sewage is effectively filtered by the filter disc 4. The transmission component 8 meshes with the gear shaft 11, and the cleaning component 5 is connected to the cleaning device 13. The transmission component 8 includes an initial position and a set position. When the squeezing component 6 squeezes the transmission component 8 from the initial position to the set position, the filter disc 4 rotates.

[0023] Reference Figure 1-3 The bottom of the pipe 2 is provided with a waste storage area 21, the top of the pipe 2 is provided with a compression area 22, a square tube 31 is provided on one side of the sleeve 3, and a closed shell 32 is provided at the bottom of the sleeve 3. The closed shell 32 is interconnected with the waste storage area 21, and the extrusion part 6 is located inside the compression area 22.

[0024] Specifically, since the compression zone 22 is located above the pipe 2, the water flow will not directly impact the extrusion part 6, and the separated impurities will fall into the interior of the waste storage zone 21. In addition, a silicone sheet is provided inside the compression zone 22 to increase the sealing effect.

[0025] Reference Figure 1-7 The transmission component 8 includes a rotating shaft 81 rotatably connected inside the mounting housing 7, a spur gear 82 fixedly connected outside the rotating shaft 81, a synchronizing gear 83 slidably connected outside one end of the rotating shaft 81, and a pressure-bearing component 84 sleeved outside the synchronizing gear 83. One end of the rotating shaft 81 is a synchronizing wheel 811, and the interior of the synchronizing gear 83 meshes with the synchronizing wheel 811.

[0026] Reference Figure 2-5A connecting shaft 41 is provided on one side of the filter disc 4. A driven gear 42 is provided on the outside of the connecting shaft 41 near the end of the pressure member 84. When the pressure member 84 is in the set position, the driven gear 42 meshes with the synchronous gear 83. The gear transmission ratio between the gear shaft 11 and the spur gear 82 is six to one.

[0027] The top of the mounting housing 7 is fixedly connected to the sleeve 71. One end of the driving component 9 is rotatably connected inside the sleeve 71. The mounting housing 7 is provided with a support rod 701. The pressure-bearing component 84 includes a paddle sleeve 841 slidably connected to the outside of the support rod 701, a connecting rod 842 connected to the bottom of the paddle sleeve 841, and an arc block 843 connected to one side of the connecting rod 842. The synchronous gear 83 is rotatably connected inside the paddle sleeve 841. A return spring 702 is connected between the support rod 701 and the paddle sleeve 841. The arc block 843 is located inside the compression zone 22.

[0028] Specifically, there is a gap between the synchronizing gear 83 and the driven gear 42, meaning they are not in a tight mesh. When the synchronizing gear 83 is driven to translate by the shift sleeve 841, it immediately meshes with the driven gear 42, causing the driven gear 42 to rotate, which in turn causes the filter disc 4 to rotate as well. Since the gear ratio between the gear shaft 11 and the spur gear 82 is 4:1, two situations occur when the synchronizing gear 83 meshes with the driven gear 42. In most cases, the gear shaft 11 does not drive the spur gear 82. In this state, because the synchronizing gear 83 and the driven gear 42... When gear 42 drives synchronous gear 83, driven gear 42 causes filter disc 4 to rotate 60 degrees, the internal pressure of pipeline 2 is rapidly released, and sewage passes through filter disc 4. Then, the sleeve 841 is pulled back by return spring 702, and synchronous gear 83 separates from driven gear 42. Alternatively, when synchronous gear 83 meshes with driven gear 42, gear shaft 11 drives spur gear 82. At this time, driven gear 42 will rotate directly with synchronous gear 83, and the angle of rotation of filter disc 4 will be less than 60 degrees. Therefore, when sewage can pass through filter disc 4, filter disc 4 will no longer rotate.

[0029] This avoids excessive rotation angle of filter disc 4. Even if the blocked area cannot be completely switched, it can ensure that the surface of the area where filter disc 4 is in contact with pipe 2 is always free of impurities. If the rotation angle of filter disc 4 is too small, the internal pressure of pipe 2 will increase rapidly, and the sewage will be squeezed into compression zone 22, causing filter disc 4 to rotate again. This eliminates the need for the equipment to stop water production and filtration when cleaning filter disc 4, as is the case with traditional backwashing methods. In the scenario of recycling construction wastewater, this means that sewage can be continuously treated and converted into reusable water resources. For example, at the construction site of a large construction project, the demand for water for concrete mixing, dust suppression, and other operations is continuous, and this equipment can ensure a stable water supply.

[0030] Reference Figure 2-6 The extrusion member 6 includes a spring telescopic rod 61 connected inside the compression zone 22, a square plate 62 connected to the bottom end of the spring telescopic rod 61, and an arc-shaped block 63 fixedly connected to the top of the square plate 62, the arc-shaped block 63 being located below the arc block 843.

[0031] Reference Figure 1-8 The driving component 9 includes a round shaft 91 rotatably connected inside the square tube 31, a disc 92 fixedly connected to one end of the round shaft 91, and a protrusion 93 disposed on the side of the disc 92 near the cleaning component 5. The round shaft 91 is located above the gear shaft 11, the protrusion 93 is not concentric with the disc 92, and the protrusion 93 is located near the outer diameter of the disc 92. The round shaft 91 is located directly above the connecting tube 51. The spur gear 82 is concentric with the connecting shaft 41, and the synchronous gear 83 meshes with the outside of the spur gear 82. When the synchronous gear 83 moves with the shift sleeve 841, the synchronous gear 83 will mesh with the driven gear 42, thereby causing the connecting shaft 41 to rotate.

[0032] Reference Figure 1-9 The cleaning component 5 includes a connecting pipe 51 disposed inside the sleeve 3, a flusher 52 rotatably connected to the outside of the connecting pipe 51, an inner groove 53 fixedly connected to one side of the flusher 52, and scrapers 54 fixedly connected to both sides of the flusher 52. The connecting pipe 51 is interconnected with the flusher 52 and is connected to the cleaning equipment 13. The protrusion 93 is located inside the inner groove 53.

[0033] Specifically, water is supplied to the connecting pipe 51 by the water pump inside the cleaning equipment 13. The water pump can be directly connected to the water tank, which contains filtered water to avoid wasting clean water. When the protrusion 93 rotates, the protrusion 93 is not concentric with the disc 92, making them eccentric. At the same time, the circular shaft 91 is located directly above the connecting pipe 51. When the protrusion 93 rotates with the disc 92, the inner groove bar 53 and the flusher 52 are affected by its rotation, and thus swing back and forth with the connecting pipe 51 as the fulcrum to clean the filter disc 4. This ensures smooth water flow in the entire filtration system, so that all components of the equipment can operate under normal working conditions and will not cause local pressure abnormalities due to long-term blockage of the filter disc 4, affecting the performance and life of the cleaning equipment 13 and the pipeline 2 or other components.

[0034] When the filter disc 4 is not rotating, the area within the square tube 31 will be continuously cleaned by the cleaning component 5, thereby effectively improving the cleaning effect.

[0035] Reference Figure 1-9 The top of the arc block 63 is provided with an arc groove 631. When the arc block 843 is in the initial position, the arc block 63 does not contact the arc block 843. When the arc block 843 is in the set position, the connecting rod 842 is located inside the arc groove 631.

[0036] Specifically, the side of the arc block 63 closest to the arc block 843 is arc-shaped. The arc surface is used to press the arc block 843. When the arc block 63 presses upward against the arc block 843, the arc block 843 drives the connecting rod 842 to move horizontally. Since the top of the arc block 63 has an arc groove 631, it avoids the arc block 63 from colliding with the connecting rod 842. When the connecting rod 842 is in contact with the inside of the arc groove 631, the arc block 63 is also blocked by the connecting rod 842 and cannot move. In addition, there is a distance difference between the arc block 63 and the connecting rod 842. The distance between the two is short, which avoids the arc block 63 from fluctuating due to water flow and thus avoiding accidental contact. When the arc block 63 comes into contact with the arc block 843, the arc block 843 will be pressed and move.

[0037] Reference Figure 1-9 The filter disc 4 is divided into an inner disc 401, a filter ring 402 and an outer ring 403. The vertical distance from the inner diameter to the outer diameter of the filter ring 402 is less than the diameter of the pipe 2. As a result, the position where the filter ring 402 fits against the pipe 2 is always within the diameter of the pipe 2, so the flusher 52 cannot process the filter disc 4.

[0038] The working principle of this invention is as follows: Sewage enters the interior of pipe 2 and passes through the filter ring 402 of the filter disc 4 for fine filtration. However, as the position where the filter ring 402 overlaps with pipe 2 gradually becomes clogged with impurities, the sewage is obstructed as it passes through the filter ring 402, leading to an increase in internal pressure in pipe 2. The sewage is then squeezed towards the compression zone 22, causing the square plate 62 to move upwards under the pressure of the water flow. As the square plate 62 moves upwards, it compresses the spring telescopic rod 61, while the arc-shaped block 63 moves along with the square plate... 62 moves upward synchronously, at which time the arc block 63 will press against the arc block 843. The arc block 843 moves horizontally to the set position under pressure. The arc block 843 causes the sleeve 841 to move synchronously through the connecting rod 842. The sleeve 841 stretches the return spring 702. The synchronous gear 83 inside the top of the sleeve 841 also moves synchronously with the sleeve 841. The synchronous gear 83 meshes with the driven gear 42 at this time. Since the servo motor 10 drives the gear shaft 11 to rotate, the gear shaft 11 will intermittently... The drive spur gear 82 rotates, causing the rotating shaft 81 to rotate synchronously with it. As the rotating shaft 81 rotates, it causes the synchronous gear 83 to rotate synchronously via the synchronous pulley 811. Therefore, when the synchronous gear 83 meshes with the driven gear 42, the synchronous gear 83 drives the connecting shaft 41 to rotate via the driven gear 42. The filter disc 4 thus rotates under the influence of the connecting shaft 41, thereby changing the position where the filter ring 402 overlaps with the pipeline 2, thus changing the position where the filter ring 402 is blocked. At this time, the inside of the pipeline 2 rapidly flows... When the pressure is released, the sewage fluctuates and flows towards the filter ring 402, causing the pressure on the square plate 62 to decrease. At this time, the spring extension rod 61 rebounds, causing the square plate 62 and the arc block 63 to move down. As a result, the arc block 843 loses its compression. The return spring 702 rebounds and pulls the sleeve 841, causing the arc block 843 to return to its initial position with the sleeve 841. At this time, the arc block 843 is in contact with the compression zone 22, and the filter disc 4 also stops rotating. Thus, by constantly switching the position of the filter ring 402 and the pipe 2, the filtration effect of the sewage is ensured. After the location of the filter ring 402 blockage is switched, when the blockage location reaches the sealed housing 32, the gear shaft 11 rotates again, driving the round shaft 91 to rotate via the transmission belt 12. The round shaft 91 causes the disc 92 to rotate, and the protrusion 93 rotates with the disc 92. Since the protrusion 93 is not concentric with the disc 92, and the protrusion 93 is located inside the inner groove 53, the protrusion 93, as it rotates with the disc 92, causes the inner groove 53 to be continuously subjected to reciprocating compression. The inner groove bar 53 is connected to the flusher 52, and the flusher 52 uses the connecting pipe 51 as a fulcrum. When the inner groove bar 53 is under pressure, the flusher 52 will drive the scraper 54 to rotate back and forth, thereby scraping the filter ring 402 with the scraper 54 and flushing the filter ring 402. The impurity particles washed out will enter the interior of the waste storage area 21 through the closed shell 32 for storage, thereby ensuring that the blocked position of the filter ring 402 is cleaned for a long time, and then it will be switched to overlap with the pipeline 2.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A circulating multi-stage sewage treatment device, comprising a support frame (1), characterized in that: It also includes a pipe (2) and a sleeve (3) fixedly connected inside the support frame (1), a filter disc (4) rotatably connected inside the sleeve (3), a cleaning component (5) disposed inside the sleeve (3), an extrusion component (6) disposed inside the pipe (2), a mounting shell (7) fixedly connected to the top of the support frame (1), a transmission component (8) disposed inside the mounting shell (7), a drive component (9) rotatably connected inside the sleeve (3), a servo motor (10) fixedly connected inside the mounting shell (7), a gear shaft (11) fixedly connected to the output end of the servo motor (10), and a sleeve on the gear shaft (1). 1) The transmission belt (12) between the drive component (9) and the cleaning device (13) is provided on one side of the support frame (1). The pipeline (2) is attached to the sleeve (3). One side of the filter disc (4) is attached to one side of the sleeve (3). The other side of the sleeve (3) is attached to the pipeline (2). The transmission component (8) meshes with the gear shaft (11). The cleaning component (5) is connected to the cleaning device (13). The transmission component (8) includes an initial position and a set position. When the squeezing component (6) squeezes the transmission component (8) from the initial position to the set position, the filter disc (4) rotates.

2. The circulating multi-stage sewage treatment equipment according to claim 1, characterized in that: The bottom of the pipeline (2) is provided with a waste storage area (21), the top of the pipeline (2) is provided with a compression area (22), a square tube (31) is provided on one side of the sleeve (3), a closed shell (32) is provided at the bottom of the sleeve (3), the closed shell (32) is interconnected with the waste storage area (21), and the extrusion component (6) is located inside the compression area (22).

3. The circulating multi-stage sewage treatment equipment according to claim 2, characterized in that: The transmission component (8) includes a rotating shaft (81) rotatably connected inside the mounting housing (7), a spur gear (82) fixedly connected outside the rotating shaft (81), a synchronizing gear (83) slidably connected outside one end of the rotating shaft (81), and a pressure-bearing component (84) sleeved outside the synchronizing gear (83). One end of the rotating shaft (81) is a synchronizing wheel (811), and the interior of the synchronizing gear (83) meshes with the synchronizing wheel (811).

4. The circulating multi-stage sewage treatment equipment according to claim 3, characterized in that: A connecting shaft (41) is provided on one side of the filter disc (4). A driven gear (42) is provided on the outside of the connecting shaft (41) near the end of the pressure member (84). When the pressure member (84) is in the set position, the driven gear (42) meshes with the synchronous gear (83). The gear transmission ratio between the gear shaft (11) and the spur gear (82) is four to one.

5. The circulating multi-stage sewage treatment equipment according to claim 4, characterized in that: The top of the mounting housing (7) is fixedly connected to a sleeve (71), one end of the driving component (9) is rotatably connected inside the sleeve (71), a support rod (701) is provided inside the mounting housing (7), the pressure-bearing component (84) includes a paddle sleeve (841) slidably connected to the outside of the support rod (701), a connecting rod (842) connected to the bottom of the paddle sleeve (841), and an arc block (843) connected to one side of the connecting rod (842). The synchronous gear (83) is rotatably connected inside the paddle sleeve (841), a return spring (702) is connected between the support rod (701) and the paddle sleeve (841), and the arc block (843) is located inside the compression zone (22).

6. The circulating multi-stage sewage treatment equipment according to claim 5, characterized in that: The extrusion member (6) includes a spring telescopic rod (61) connected inside the compression zone (22), a square plate (62) connected to the bottom end of the spring telescopic rod (61), and an arc block (63) fixedly connected to the top of the square plate (62), the arc block (63) being located below the arc block (843).

7. The circulating multi-stage sewage treatment equipment according to claim 5, characterized in that: The drive unit (9) includes a round shaft (91) rotatably connected inside the square tube (31), a disc (92) fixedly connected to one end of the round shaft (91), and a protrusion (93) disposed on the side of the disc (92) near the cleaning unit (5). The round shaft (91) is located above the gear shaft (11), the protrusion (93) is not concentric with the disc (92), the round shaft (91) is located directly above the connecting tube (51), and the spur gear (82) is concentric with the connecting shaft (41).

8. The circulating multi-stage sewage treatment equipment according to claim 7, characterized in that: The cleaning component (5) includes a connecting pipe (51) disposed inside the sleeve (3), a flusher (52) rotatably connected to the outside of the connecting pipe (51), an inner groove (53) fixedly connected to one side of the flusher (52), and scrapers (54) fixedly connected to both sides of the flusher (52). The connecting pipe (51) is interconnected with the flusher (52), and the connecting pipe (51) is connected to the cleaning equipment (13). The protrusion (93) is located inside the inner groove (53).

9. The circulating multi-stage sewage treatment equipment according to claim 6, characterized in that: The top of the arc block (63) is provided with an arc groove (631). When the arc block (843) is in the initial position, the arc block (63) does not contact the arc block (843). When the arc block (843) is in the set position, the connecting rod (842) is located inside the arc groove (631).

10. The circulating multi-stage sewage treatment equipment according to claim 8, characterized in that: The filter disc (4) is divided into an inner disc (401), a filter ring (402) and an outer ring (403). The vertical distance from the inner diameter to the outer diameter of the filter ring (402) is less than the diameter of the pipe (2).

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