Sewage treatment sedimentation tank

Abstract

The invention discloses a sewage treatment settling pond which comprises a settling pond body, a plurality of partition plates are fixedly arranged in the settling pond body, two through grooves are formed in each partition plate, the settling pond body is divided into a plurality of small settling pond bodies through the partition plates, the pressure in the single settling pond body is reduced, and the adjacent settling pond bodies are communicated through the through grooves. In this way, overall use is not affected, the situation that water seepage occurs to the first plugging blocks and the second plugging blocks due to the reduced pressure is avoided, then water and bottom sediment are temporarily separated through the sealing structure, normal work is kept on the upper portion, scraping work is conducted through the mud scraping plate on the lower portion, and therefore the bottom sediment is scraped away; the cleaning work is completed, operation is easy and convenient, the sedimentation tank does not need to be stopped, the working efficiency is guaranteed, meanwhile, sediments attached to the bottom of the tank and the side wall of the bottom can be cleaned without an operator going down to the bottom of the tank, the working efficiency is further improved, and the labor intensity of the operator is reduced.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and more specifically to a wastewater treatment sedimentation tank. Background Technology

[0002] A sedimentation tank is a structure that removes suspended solids from water through sedimentation, thus purifying the water. It utilizes the natural sedimentation or coagulation process to remove suspended solids. Sedimentation tanks are classified into horizontal and vertical sedimentation tanks based on the direction of water flow. The sedimentation effect depends on the water flow rate and residence time within the tank. Sedimentation tanks are widely used in wastewater treatment.

[0003] Currently, the cleaning of sediment in sedimentation tanks is done manually or mechanically. When manually removing sediment, the floating wastewater in the sedimentation tank is drained, and then the operator goes down into the sedimentation tank to use a mud pump to slowly extract the sediment. After the mud is extracted, the bottom of the sediment and the inner walls of the tank must be carefully cleaned to prevent corrosion caused by long-term adhesion. This process takes a long time and affects the efficiency of wastewater treatment. Mechanical removal, on the other hand, tends to muddy the sediment, requiring secondary sedimentation, which is also inconvenient.

[0004] Therefore, a sedimentation tank that can easily clean sediment and the bottom of the sedimentation tank is needed. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a wastewater treatment sedimentation tank.

[0006] This invention is achieved through the following technical solution:

[0007] A wastewater treatment sedimentation tank includes a sedimentation tank with multiple baffles fixedly installed inside, each baffle having two through slots. A maintenance pit is provided on one side of the sedimentation tank, and a sludge removal pit is provided on the other side. A retention groove is provided on the inner wall of one side of the sludge removal pit. Movable structures are provided in both the maintenance pit and the sludge removal pit. Multiple sets of first and second sealing components are fixedly embedded on both sides of the sedimentation tank. The movable structure in the sludge removal pit is fixed to the side wall of the second sealing component, and the movable structure in the maintenance pit is fixed to the first sealing component. A cleaning structure is installed on one side of the first sealing component. Multiple sets of sealing structures are installed inside the sedimentation tank.

[0008] Preferably, the sealing structure includes a support plate, which is L-shaped and fixedly installed on the inner wall of the sedimentation tank and the side wall of the partition. The side wall of the support plate is provided with multiple positioning grooves, and a central rod is slidably connected in two corresponding positioning grooves. Two hinge plates are hinged on each central rod. A pressure frame is fixedly connected to the top of the multiple central rods. A lifting frame is fixedly connected to the top of the pressure frame. Electric telescopic rods are fixedly installed on both sides of the lifting frame. The bottom end of the electric telescopic rod is fixedly installed on the sedimentation tank and the top of the partition.

[0009] Preferably, the bottom end of the support plate is provided with a sliding groove, and a sliding rod is slidably connected in the sliding groove. The bottom end of the sliding rod is fixedly connected to the top end of the corresponding cleaning structure.

[0010] Preferably, the movable structure includes a mounting frame and guide wheels. A winder is mounted on the mounting frame, and the guide wheels are fixedly mounted on the side walls of the first and second sealing components, respectively. The two winders share a common steel wire rope, the outer wall of which is wrapped with a sealing rubber sheet. The steel wire rope is slidably connected to the first and second sealing components, and passes through and is fixedly connected to the cleaning structure. A hydraulic cylinder is fixedly mounted on the inner wall of one side of the dwell groove, and a connecting plate is fixedly connected to the output end of the hydraulic cylinder. The connecting plate is fixedly connected to the side walls of multiple second sealing components by pins, and a seal is installed at the sliding connection points between the steel wire rope and the first and second sealing components.

[0011] Preferably, the cleaning structure includes a scraper and a drive motor. The scraper has a cavity and is L-shaped. The drive motor is fixedly mounted on the inner wall of the cavity. A rotating plate is fixedly mounted on the output end of the drive motor. Three sets of sliding frames are arranged in the cavity. The sliding frames are U-shaped. Each sliding frame has a lever fixedly mounted on it. The rotating plate is arranged between the levers. Each sliding frame extends through one side wall of the cavity and is slidably connected to the cavity. An installation plate is fixedly mounted on one end of each sliding frame. Multiple striking rods are fixedly connected to each installation plate. A slidingly connected obstruction cylinder is sleeved on each striking rod. A connecting rod is fixedly connected between adjacent obstruction cylinders. Multiple connecting rods on one side are fixedly connected to the side wall of the scraper. Multiple stops are fixedly mounted on each sliding frame. A return spring is sleeved on each sliding frame. The return spring is arranged in the cavity and located between the inner wall of the cavity and the stops.

[0012] Preferably, two connecting frames are fixedly connected to the outer wall of the sludge scraper. The connecting frames are inclined, and a chamfered scraper is fixedly installed at one end of each connecting frame. The chamfered scraper is L-shaped and is located at the two chamfered corners at the bottom of the sedimentation tank and is fitted together.

[0013] Preferably, a cleaning structure is fixedly installed on the outer wall of the scraper blade. The cleaning structure includes multiple limiting frames, a synchronous belt, and a cleaning motor. A fixing frame is fixedly installed on the outer wall of the scraper blade, and a cleaning motor is fixedly installed on the fixing frame. A synchronous pulley is fixedly installed at the output end of the cleaning motor. The synchronous belt is sleeved on the synchronous pulley and cooperates with the synchronous pulley. The synchronous belt is U-shaped in general. A wire brush is fixedly installed on the outer surface of the synchronous belt. A combing plate is symmetrically fixedly installed on the outer wall of the scraper blade. The combing plate is comb-shaped, and the combing end of the combing plate is in contact with the outer wall of the synchronous belt. Multiple pressure plates are fixedly installed on the scraper blade. Each pressure plate extends into the synchronous belt and is in contact with the inner wall of the synchronous belt. A first guide roller is installed on each of the multiple limiting frames. The first guide roller is located at the four corners of the scraper blade. A second guide roller is installed on the two inclined limiting frames located at the bottom. The two second guide rollers are in contact with the outer wall of the synchronous belt. A wiper blade is fixedly installed on the scraper blade. The wiper blade is U-shaped.

[0014] Preferably, two water tanks are provided in the cavity, and connecting hoses are fixedly connected to the two water tanks respectively. One end of the connecting hose extends out of the cavity and through the first sealing member and is slidably connected to the first sealing member. The water tanks are U-shaped in general. Multiple nozzles are fixedly installed on the outer wall of the water tanks. The nozzles located on the cleaning structure are vertically arranged, and the nozzles located on one side of the mounting plate are inclined.

[0015] Compared with existing technologies, the advantages of this invention are as follows: The sedimentation tank is divided into several smaller sedimentation tanks using partitions, reducing the pressure inside each individual tank. Adjacent sedimentation tanks are connected by through channels, ensuring no impact on overall operation. The reduced pressure prevents leakage from the multiple first and second sealing blocks. A sealing structure temporarily separates the water from the bottom sediment, allowing normal operation above while a scraper removes the sediment from the bottom, completing the cleaning process. The operation is simple and convenient, requiring no shutdown of the sedimentation tank, thus ensuring work efficiency. Furthermore, it eliminates the need for operators to descend to the bottom of the tank to clean the sediment adhering to the bottom and side walls, further improving work efficiency and reducing the labor intensity of operators. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure described in this invention;

[0017] Figure 2 It is the structure described in this invention. Figure 1 Cross-sectional view of AA;

[0018] Figure 3 It is the structure described in this invention. Figure 1 Structural diagram of the cleanup structure;

[0019] Figure 4It is the structure described in this invention. Figure 3 Cross-sectional view of BB;

[0020] Figure 5 It is the structure described in this invention. Figure 3 Side view of the chamfered scraper;

[0021] Figure 6 It is the structure described in this invention. Figure 3 Right view of the cleaning structure in the middle;

[0022] Figure 7 It is the structure described in this invention. Figure 6 Structural diagram of the comb plate.

[0023] In the diagram: 1. Sedimentation tank; 2. Baffle plate; 3. Through channel; 4. Inspection pit; 5. Dredging pit; 6. Retention tank; 7. Hydraulic cylinder; 8. First sealing component; 9. Second sealing component; 10. Moving structure; 11. Guide wheel; 12. Seal; 13. Connecting plate; 14. Sealing structure; 15. Sliding groove; 16. Sliding rod; 17. Positioning groove; 18. Center rod; 19. Hinge plate; 20. Pressure frame; 21. Lifting frame; 22. Electric telescopic rod; 23. Cleaning structure; 24. Cavity; 25. Fixing component; 26. Water. Box 26, connecting hose 27, sliding frame 28, stop block 29, return spring 30, lever 31, drive motor 32, rotating plate 33, battery pack 34, mounting plate 35, striking rod 36, obstruction cylinder 37, connecting rod 38, chamfering scraper 39, connecting frame 40, synchronous belt 41, pressure plate 42, first guide roller 43, cleaning structure 44, scraper 45, second guide roller 46, fixing frame 47, cleaning motor 48, combing plate 49. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0025] like Figures 1 to 7As shown, a wastewater treatment sedimentation tank includes a sedimentation tank 1. Multiple partitions 2 are fixedly installed inside the sedimentation tank 1, each partition 2 having two through slots 3. A maintenance pit 4 is provided on one side of the sedimentation tank 1, and a sludge-removing pit 5 is provided on the other side. A retention groove 6 is provided on the inner wall of one side of the sludge-removing pit 5. Movable structures 10 are provided in both the maintenance pit 4 and the sludge-removing pit 5. Multiple sets of first sealing elements 8 and second sealing elements 9 are fixedly embedded on both sides of the sedimentation tank 1. The movable structure 10 located in the sludge-removing pit 5 is fixed to the side wall of the second sealing element 9, and the movable structure 10 located in the maintenance pit 4 is fixed to the first sealing element 8. A cleaning structure 23 is installed on one side of the first sealing element 8. Multiple sets of sealing structures 14 are installed inside the sedimentation tank 1. The partitions 2 divide the sedimentation tank 1 and connect them to each other through multiple through slots, thus not affecting the overall normal operation. While in use, it reduces the internal pressure of a single sedimentation tank, effectively preventing leakage from the first sealing component 8 and the second sealing component 9, ensuring normal operation. When cleaning is performed, the sealing structure 14 first starts working to separate the water in the sedimentation tank from the bottom sediment (inevitably, a small amount of tank water and sediment will be discharged together). After separation, the moving structure 10 is activated, which allows the cleaning structure 23 to begin cleaning, cleaning the internal sediment into the sludge removal pit 5. Then, a mud pump set on one side is used to extract the sediment. After extraction, the sediment is placed in a filter press for water recovery and reuse, while the sediment is buried or incinerated. This eliminates the need for operators to enter the tank for cleaning, ensuring operator safety and reducing their labor intensity. At the same time, it eliminates the need to stop the machine, ensuring the normal use of the sedimentation tank 1 and guaranteeing work efficiency.

[0026] The sealing structure 14 includes a support plate, which is L-shaped and fixedly installed on the inner wall of the sedimentation tank 1 and the side wall of the partition 2. Multiple positioning grooves 17 are provided on the side wall of the support plate. A central rod 18 is slidably connected to two corresponding positioning grooves 17. Two hinge plates 19 are hinged to each central rod 18. A pressure frame 20 is fixedly connected to the top of the multiple central rods 18. A lifting frame 21 is fixedly connected to the top of the pressure frame 20. Electric telescopic rods 22 are fixedly installed on both sides of the lifting frame 21. The bottom ends of the electric telescopic rods 22 are fixedly installed on the top of the sedimentation tank 1 and the partition 2. When the sealing structure is in operation, the electric telescopic rod 22 is activated and begins to descend, causing the lifting frame 21 to descend as well. The lifting frame 21 drives the pressure frame 20 to descend. The bottom ends of the multiple pressure frames 20 are fixedly installed with a central rod 18, and a hinge plate 19 is hinged to the central rod 18. The bottom ends of the two hinge plates 19 are limited by the support plate, which increases the angle between the two hinge plates 19. This causes the ends of two adjacent hinge plates 19 with opposite inclination directions to fit together, forming a curved seal that temporarily separates the water from the sediment at the bottom of the pool, thus facilitating the normal operation of subsequent work.

[0027] The bottom end of the support plate is provided with a sliding groove 15, and a sliding rod 16 is slidably connected in the sliding groove 15. The bottom end of the sliding rod 16 is fixedly connected to the top end of the corresponding cleaning structure 23. The sliding groove 15 and the sliding rod 16 serve as guides.

[0028] The movable structure 10 includes a mounting frame and guide wheels 11. A winder is mounted on the mounting frame. The guide wheels 11 are fixedly mounted on the side walls of the first sealing member 8 and the second sealing member 9, respectively. A common steel wire rope is wound between the two winders. The outer wall of the steel wire rope is wrapped with a sealing rubber sheet. The steel wire rope is slidably connected to the first sealing member 8 and the second sealing member 9, respectively. The steel wire rope passes through the cleaning structure 23 and is fixedly connected to it. A hydraulic cylinder 7 is fixedly mounted on the inner wall of one side of the dwell groove 6. A connecting plate 13 is fixedly connected to the output end of the hydraulic cylinder 7. The connecting plate 13 is fixedly connected to the side walls of multiple second sealing members 9 by pins. Sealing elements 12 are installed at the sliding connection points between the steel wire rope and the first and second sealing members 8 and 9. When the movable structure 10 starts working (… (Assuming the sealing structure 14 has completed the separation work), start the hydraulic cylinder 7. The hydraulic cylinder 7 drives the connecting plate 13 to start moving (the connection can be selectively made according to the actual sedimentation tank 1 to be cleaned, such as cleaning only one or more at a time, or cleaning all of them. Selectively fix the connecting frame 13 on the corresponding second sealing part 9 according to the cleaning target). The connecting plate 13 drives the second sealing part 9 to start moving. In this way, the sediment will flow into the sludge pit 5 through the opening. Then, the sediment mixed with water is extracted by the mud pump for subsequent processing. When the sediment has flowed out to a certain extent, start the two winding machines. This will drive the cleaning structure 23 to start operating, thereby pushing out the remaining small amount of sediment, thus ensuring that the bottom of the sedimentation tank 1 is clean.

[0029] The cleaning structure 23 includes a scraper, a fixing member 25, and a drive motor 32. A steel wire rope is fixed to the scraper via the fixing member 25. A cavity 24 is provided inside the scraper, and a battery pack 34 is fixedly installed on the inner wall of the cavity 24. The scraper is generally L-shaped. The drive motor 32 is fixedly installed on the inner wall of the cavity 24, and a rotating plate 33 is fixedly installed at the output end of the drive motor 32. Three sets of sliding frames 28 are provided inside the cavity 24. The sliding frames 28 are generally U-shaped, and a lever 31 is fixedly installed on each sliding frame 28. The rotating plate 33 is... Between the multiple levers 31, each sliding frame 28 protrudes from one side wall of the cavity 24 and is slidably connected to the cavity 24. One end of each sliding frame 28 is fixedly mounted with a mounting plate 35. Multiple striking rods 36 are fixedly connected to each mounting plate 35. Each striking rod 36 is fitted with a slidably connected obstructing cylinder 37. Connecting rods 38 are fixedly connected between adjacent obstructing cylinders 37. Multiple connecting rods 38 located on one side are respectively fixedly connected to the side wall of the scraper blade. Multiple stops 29 are fixedly mounted on each sliding frame 28. Each sliding bracket 28 is fitted with a return spring 30. The return spring 30 is located inside the cavity 24 and between the inner wall of the cavity 24 and the stop block 29. When the cleaning structure 23 starts working, the scraper blade pushes and cleans the remaining sediment first. Then, the drive motor 32 inside the cavity 24 is started. After the drive motor 32 starts, it begins to rotate rapidly. During the rotation, the rotating plate 33 will continuously contact the lever 31. However, each sliding bracket 28 is also equipped with a return spring 30. So, when it contacts the lever 31, since the top of the lever 31 is arc-shaped, it will... This causes the sliding frame 28 to descend, compressing the return spring 30. Multiple densely arranged striking rods 36 contact the ground and strike it with a certain force. Because the striking rods 36 are very dense, the impact disperses the sediment attached to the bottom and causes some vibration, making the sediment less tightly bound. With continuous striking, the return spring 30 is continuously compressed and released. As the scraper slowly moves, the attached sediment is initially cleaned, preparing for the next cleaning step.

[0030] Two connecting frames 40 are fixedly connected to the outer wall of the sludge scraper. The connecting frames 40 are set at an incline. A chamfered scraper 39 is fixedly installed at one end of each connecting frame 40. The chamfered scraper 39 is L-shaped and is located at the two chamfered corners at the bottom of the sedimentation tank 1 and fits snugly. As the sludge scraper moves, the chamfered scraper 39 is responsible for cleaning the sediment at the chamfered corners of the sedimentation tank 1. The sediment will be scooped up by its front end.

[0031] A cleaning structure 44 is fixedly installed on the outer wall of the scraper blade. The cleaning structure 44 includes multiple limit frames, a synchronous belt 41, and a cleaning motor 48. A fixing frame 47 is fixedly installed on the outer wall of the scraper blade, and the cleaning motor 48 is fixedly installed on the fixing frame 47. A synchronous pulley is fixedly installed at the output end of the cleaning motor 48. The synchronous belt 41 is sleeved on the synchronous pulley and cooperates with the synchronous pulley. The synchronous belt 41 is U-shaped in general. A wire brush is fixedly installed on the outer surface of the synchronous belt 41. A combing plate 4 is symmetrically fixedly installed on the outer wall of the scraper blade. 9. The combing plate 49 is comb-shaped, and the combing end of the combing plate 49 is fitted against the outer wall of the synchronous belt 41. Multiple pressure plates 42 are fixedly installed on the scraper plate, and each pressure plate 42 extends into the synchronous belt 41 and is fitted against the inner wall of the synchronous belt 41. First guide rollers 43 are installed on multiple limit frames, and the first guide rollers 43 are located at the four corners of the scraper plate. Second guide rollers 46 are installed on the two inclined limit frames located at the bottom, and the two second guide rollers 46 are fitted against the outer wall of the synchronous belt 41. A water scraper is fixedly installed on the scraper plate. The scraper 45 is U-shaped and located at the front. The sediment adhering to the wall has become less tightly bound due to the gentle tapping. Therefore, when the cleaning structure 44 starts working, the cleaning motor 48 on the fixed frame 47 starts. This causes the synchronous pulley at the output end of the cleaning motor 48 to drive the synchronous belt 41 to rotate. The wire brush on the outer wall of the synchronous belt 41 begins to scrub the wall, and a pressure plate 42 is provided to ensure sufficient pressure, allowing the wire brush to make close contact with the wall. During the scraping process, the deposits easily stick to the wire brush, so a combing plate 49 is provided to comb the wire brush, reducing the amount of sediment adhering to it and causing it to accumulate on the support of the combing plate 49. This makes it easy to remove the loosely bound deposits, keeping the walls of the sedimentation tank 1 clean to a certain extent. After cleaning, the operator uses clean water at the sludge removal pit 5 to rinse the entire area. After rinsing, the moving structure 10 is used to reset the tank, and the rinsed water is directly pumped away by the mud pump, ensuring the entire area remains clean and tidy.

[0032] Two water tanks 26 are provided inside the cavity 24. Connecting hoses 27 are fixedly connected to the two water tanks 26 respectively. One end of the connecting hose 27 extends out of the cavity 24 and the first sealing member 8 and is slidably connected to the first sealing member 8. The water tank 26 is U-shaped in general. Multiple nozzles are fixedly installed on the outer wall of the water tank 26. The nozzles located on the cleaning structure 44 are vertically arranged, and the nozzles located on one side of the mounting plate 35 are inclined. The water tank 26 is filled with cleaning agent, which facilitates the overall cleaning work.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment sedimentation tank, comprising a sedimentation tank (1), characterized in that: Multiple partitions (2) are fixedly installed inside the sedimentation tank (1). Each partition (2) has two through slots (3). A maintenance pit (4) is provided on one side of the sedimentation tank (1), and a sludge removal pit (5) is provided on the other side of the sedimentation tank (1). A retention groove (6) is provided on the inner wall of one side of the sludge removal pit (5). A movable structure (10) is provided in both the maintenance pit (4) and the sludge removal pit (5). Multiple sets of first sealing components (8) and second sealing components (9) are fixedly embedded on both sides of the sedimentation tank (1). The movable structure (10) located in the sludge removal pit (5) is fixed on the side wall of the second sealing component (9), and the movable structure (10) located in the maintenance pit (4) is fixed on the first sealing component (8). A cleaning structure (23) is installed on one side of the first sealing component (8). Multiple sets of sealing structures (14) are installed inside the sedimentation tank (1).

2. The wastewater treatment sedimentation tank according to claim 1, characterized in that: The sealing structure (14) includes a support plate, which is L-shaped and fixedly installed on the inner wall of the sedimentation tank (1) and the side wall of the partition (2). Multiple positioning grooves (17) are provided on the side wall of the support plate. A central rod (18) is slidably connected in two corresponding positioning grooves (17). Two hinge plates (19) are hinged on each central rod (18). A pressure frame (20) is fixedly connected to the top of the multiple central rods (18). A lifting frame (21) is fixedly connected to the top of the pressure frame (20). An electric telescopic rod (22) is fixedly installed on both sides of the lifting frame (21). The bottom end of the electric telescopic rod (22) is fixedly installed on the top of the sedimentation tank (1) and the partition (2).

3. A wastewater treatment sedimentation tank according to claim 2, characterized in that: The bottom end of the support plate is provided with a groove (15), and a slide rod (16) is slidably connected in the groove (15). The bottom end of the slide rod (16) is fixedly connected to the top end of the corresponding cleaning structure (23).

4. A wastewater treatment sedimentation tank according to claim 1, characterized in that: The movable structure (10) includes a mounting frame and guide wheels (11). A winder is mounted on the mounting frame. The guide wheels (11) are fixedly mounted on the side walls of the first sealing member (8) and the second sealing member (9). The two winders are wound together with the same wire rope. The outer wall of the wire rope is wrapped with rubber for sealing. The wire rope is slidably connected to the first sealing member (8) and the second sealing member (9). The wire rope passes through the cleaning structure (23) and is fixedly connected to it. A hydraulic cylinder (7) is fixedly mounted on the inner wall of one side of the dwell groove (6). A connecting plate (13) is fixedly connected to the output end of the hydraulic cylinder (7). The connecting plate (13) is fixedly connected to the side walls of multiple second sealing members (9) by pins. A sealing element (12) is installed at the sliding connection between the wire rope and the first sealing member (8) and the second sealing member (9).

5. A wastewater treatment sedimentation tank according to claim 1, characterized in that: The cleaning structure (23) includes a scraper and a drive motor (32). The scraper has a cavity (24) and is L-shaped. The drive motor (32) is fixedly installed on the inner wall of the cavity (24). A rotating plate (33) is fixedly installed on the output end of the drive motor (32). Three sets of sliding frames (28) are provided in the cavity (24). The sliding frames (28) are U-shaped. Each sliding frame (28) is fixedly installed with a lever (31). The rotating plate (33) is located between the levers (31). Each sliding frame (28) extends through one side wall of the cavity (24) and is slidably connected to the cavity (24). One end of each frame (28) is fixedly installed with an installation plate (35). Each installation plate (35) is fixedly connected with multiple striking rods (36). Each striking rod (36) is fitted with a slidingly connected obstruction cylinder (37). Adjacent obstruction cylinders (37) are fixedly connected with connecting rods (38). Multiple connecting rods (38) located on one side are fixedly connected to the side wall of the scraper. Each sliding frame (28) is fixedly installed with multiple stops (29). Each sliding frame (28) is fitted with a return spring (30). The return spring (30) is located in the cavity (24) and between the inner wall of the cavity (24) and the stop (29).

6. A wastewater treatment sedimentation tank according to claim 5, characterized in that: Two connecting frames (40) are fixedly connected to the outer wall of the sludge scraper. The connecting frames (40) are inclined. A chamfered scraper (39) is fixedly installed at one end of each connecting frame (40). The chamfered scraper (39) is L-shaped and is located at the two chamfered corners at the bottom of the sedimentation tank (1) and fits snugly.

7. A wastewater treatment sedimentation tank according to claim 5, characterized in that: A cleaning structure (44) is fixedly installed on the outer wall of the scraper. The cleaning structure (44) includes multiple limit frames, a synchronous belt (41), and a cleaning motor (48). A fixing frame (47) is fixedly installed on the outer wall of the scraper. The cleaning motor (48) is fixedly installed on the fixing frame (47). A synchronous pulley is fixedly installed at the output end of the cleaning motor (48). The synchronous belt (41) is sleeved on the synchronous pulley and cooperates with the synchronous pulley. The synchronous belt (41) is U-shaped. A wire brush is fixedly installed on the outer surface of the synchronous belt (41). A combing plate (49) is symmetrically fixedly installed on the outer wall of the scraper. The comb-shaped comb plate (49) is attached to the outer wall of the synchronous belt (41). Multiple pressure plates (42) are fixedly installed on the scraper plate. Each pressure plate (42) extends into the synchronous belt (41) and is attached to the inner wall of the synchronous belt (41). A first guide roller (43) is installed on multiple limit frames. The first guide roller (43) is located at the four corners of the scraper plate. A second guide roller (46) is installed on the two inclined limit frames located below. The two second guide rollers (46) are attached to the outer wall of the synchronous belt (41). A wiper plate (45) is fixedly installed on the scraper plate. The wiper plate (45) is U-shaped.

8. A wastewater treatment sedimentation tank according to claims 5-7, characterized in that: Two water tanks (26) are provided inside the cavity (24). Connecting hoses (27) are fixedly connected to the two water tanks (26). One end of the connecting hose (27) passes through the cavity (24) and the first sealing member (8) and is slidably connected to the first sealing member (8). The water tank (26) is U-shaped. Multiple nozzles are fixedly installed on the outer wall of the water tank (26). The nozzles on the cleaning structure (44) are vertically arranged, and the nozzles on the side of the mounting plate (35) are inclined.

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