Sludge pre-sedimentation device with automatic adjusting function and use method thereof

Abstract

The invention relates to the technical field of sewage treatment, in particular to a sludge pre-sedimentation device with an automatic adjusting function and a use method of the sludge pre-sedimentation device. Aiming at the problems of sludge leakage, non-adjustable depth, pipeline blockage and pool bottom residue in a traditional fixed sludge suction device, the device is connected with a sludge pipe through a sludge box, the bottom of the sludge pipe is fixedly connected with a sealing plate and sleeved with a liftable outer rectangular frame, and the outer rectangular frame is slidably inserted into an inner rectangular frame. The outer rectangular frame is provided with an arc-shaped hole and a plugging assembly, the sliding vertical plate is pushed when the inner rectangular frame touches the bottom, and the driving protruding block relieves plugging of the arc-shaped hole by the circular truncated cone block. The device comprises an electric push rod for adjusting height, a servo motor for driving a transverse moving assembly and a triangular plate arranged at the bottom of the sludge box. During use, the outer rectangular frame and the inner rectangular frame cover the sludge suction device, so that leakage is reduced; the height is adjustable to adapt to sludge layer change; after the inner rectangular frame touches the bottom, the drainage holes are staggered and closed; and transversely moving to gather the sludge.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a sludge pre-sedimentation device with an automatic adjustment function and a use method thereof. Background Art

[0002] During the sewage treatment process, sludge pre-sedimentation directly affects effluent quality. Traditional sludge pump suction methods have significant shortcomings. Sludge easily diffuses from the suction port, causing particles to re-enter the water body, which not only reduces treatment efficiency but also increases the burden of subsequent filtration. The suction port is fixed in position and cannot be adjusted according to changes in the thickness of the sludge layer, resulting in incomplete shallow suction or low deep suction efficiency. Impurities in the sludge easily accumulate in the pipes, and frequent blockages require shutdowns for cleaning, interrupting continuous operation. Sludge residue remains in the corners of the pool bottom, making it difficult for traditional equipment to fully fit the contours. Cleaning relies on manual assistance, increasing operating costs. These problems limit the effectiveness and stability of sludge treatment.

[0003] In order to solve the above problems, the present invention proposes a sludge pre-settling device with automatic adjustment function, which realizes efficient and clean sludge suction through mechanical structure innovation. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems of sludge leakage and secondary pollution in the sludge pump in the prior art: direct suction can easily lead to sludge diffusion, and the lifted sludge particles re-enter the water body, reducing the treatment efficiency and increasing the subsequent filtration load; the suction depth is not adjustable: the fixed suction port cannot adapt to the changes in the thickness of the sludge layer, resulting in incomplete shallow suction or low deep suction efficiency; the risk of pipeline blockage: impurities in the sludge are easy to accumulate in the suction pipe, requiring frequent shutdowns for cleaning, affecting continuous operation capabilities; sludge residue on the bottom of the pool: traditional devices are difficult to fit the contour of the bottom of the pool, resulting in sludge residue in the corners and requiring manual assistance for cleaning. A sludge pre-sedimentation device with automatic adjustment function and a method of using the same are proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A sludge pre-settling device with an automatic adjustment function comprises a sludge box and a sludge pipe passing through the top thereof, the top of the sludge box being fixedly connected to a U-shaped support plate, the bottom end of the sludge pipe being fixedly connected to a sealing plate, a liftable outer rectangular frame being sleeved on the outer side of the sealing plate, an inner rectangular frame being slidably inserted into the bottom of the outer rectangular frame, an arc-shaped hole communicating with the sludge pipe being provided on the top of the outer rectangular frame, a plurality of interconnected grooves being provided on the inner wall of the arc-shaped hole, and a round rod being slidably passed through the interior of the groove;

[0007] The top of the outer rectangular frame is provided with a blocking assembly, comprising a truncated cone block fixedly arranged on the top of a plurality of round rods and a first tension spring connected to the top thereof, both ends of the first tension spring are fixedly connected to the bottom of the round rod and the bottom inner wall of the groove through a hook, the bottom of the truncated cone block is fixedly connected to a conical block, and the truncated cone block blocks the arc hole under normal conditions, two symmetrically arranged rectangular grooves are provided on the inner walls of both sides of the outer rectangular frame, and a plurality of rectangular holes connected to the rectangular grooves are provided inside the sealing plate;

[0008] The sealing plate is provided with a release assembly on both sides, which includes a laterally movable protrusion and a sliding vertical plate matched with its inclined groove. When the inner rectangular frame touches the bottom, the sliding vertical plate is pushed up, driving the protrusion to push open the frustum block to release the blockage.

[0009] In one possible design, the outer wall of the sludge pipe is slidably fitted with a rectangular slide, the top of the rectangular slide is connected to an electric push rod, the piston rod of the electric push rod is fixed to a rectangular mounting plate to drive the outer rectangular frame to rise and fall; the top of the rectangular mounting plate is symmetrically fixed with a limit rod, the limit rod passes through the rectangular slide and has a limit block at the end.

[0010] In a possible design, it also includes an adjustment component: a screw is rotatably set between the fixed blocks fixed on both sides of the U-shaped support plate, and a servo motor that drives the screw is fixed to the outer side of the fixed block; a side strip hole is opened on the side of the U-shaped support plate, and one side of the rectangular slide is fixed to a threaded block that is threadedly driven by the screw, and the threaded block is connected to the strip plate through the side strip hole.

[0011] In one possible design, a plurality of second drainage holes are provided on the side wall of the inner rectangular frame, and a corresponding first drainage hole is provided on the side wall of the outer rectangular frame; when the inner rectangular frame has not touched the bottom, the first drainage hole and the second drainage hole are aligned to form a drainage channel; when the inner rectangular frame touches the bottom, the outer rectangular frame continues to move downward so that the first drainage hole and the second drainage hole are staggered and closed.

[0012] In a possible design, two sides of the top of the inner rectangular frame are provided with clearance holes, and the clearance holes are connected with part of the first drainage holes when the outer rectangular frame moves downward to the final position to maintain a micro gap.

[0013] In a possible design, one end of the protrusion is connected to the side wall of the rectangular groove via a second tension spring, and the two ends of the second tension spring are fixedly connected to one end of the protrusion and one inner wall of the rectangular groove through hooks respectively. An oblique groove is provided on the top side of the protrusion, and the top inclined surface of the sliding vertical plate abuts against the oblique groove of the protrusion. When the inner rectangular frame touches the bottom, it pushes the sliding vertical plate up, forcing the protrusion to move horizontally and push the frustum block.

[0014] In a possible design, triangular plates for diversion are fixed to both sides of the bottom of the sludge box, and the triangular plates are tilted to allow the sludge to gather in the middle.

[0015] In a possible design, a top strip hole for the rectangular slide to slide is opened on the top of the U-shaped support plate, and the extension direction of the side strip holes is perpendicular to the top strip hole.

[0016] A method for using a sludge pre-settling device with an automatic adjustment function specifically comprises the following steps:

[0017] S1. Sealed suction: The outer rectangular frame and the inner rectangular frame cover the sludge, and the sludge pump sucks through the sludge pipe to reduce sludge leakage.

[0018] S2. Height adjustment: The electric push rod drives the sludge pipe and the outer rectangular frame to move downward. Initially, the inner rectangular frame protrudes and the drainage holes are aligned for drainage.

[0019] S3. Sealing the pool bottom: After the inner rectangular frame touches the bottom, the outer rectangular frame continues to move downward, and the drainage holes are blocked in an alternating manner, leaving only the holes to prevent adsorption.

[0020] S4, blockage release: the outer rectangular frame touches the sliding vertical plate, pushing the protrusion to move horizontally, and releasing the blockage of the frustum block on the arc hole.

[0021] S5. Sludge gathering: The servo motor drives the sealing plate to move horizontally, and cooperates with the triangular plate to gather the sludge to the suction area to facilitate the next suction.

[0022] In the present application, when in use, a sludge pump can be connected to a hose and then to a sludge pipe through the hose. The sludge pipe is connected to the arc-shaped hole, and the sludge at the bottom of the pool is pumped out through the outer rectangular frame and the inner rectangular frame. Compared with the direct suction of an ordinary sludge pump, the present application covers the sludge through the outer rectangular frame and the inner rectangular frame. After covering, the suction process is carried out, thereby reducing the leakage of sludge and preventing the sludge from being lifted up and entering the water again.

[0023] By starting the electric push rod, the piston rod of the electric push rod drives the rectangular mounting plate to move downward, and the rectangular mounting plate drives the limit rod to move downward. The limit rod ensures the stability of the movement of the rectangular mounting plate, and the limit block can prevent the rectangular mounting plate from falling off. The rectangular mounting plate drives the internal sludge pipe to move, and then the height of the sludge pipe can be adjusted. The sludge pipe drives the outer rectangular frame below to move downward. When it moves downward initially, the bottom of the inner rectangular frame protrudes to the bottom of the outer rectangular frame, and the first drainage hole and the second drainage hole are completely aligned to ensure that the water can be completely discharged when it moves downward;

[0024] When the inner rectangular frame contacts the bottom inner wall of the sludge box, the outer rectangular frame continues to move downward, and the outer rectangular frame and the inner rectangular frame contact the bottom inner wall of the sludge box together and hold the sludge. At this time, the second drainage hole and the first drainage hole are staggered to block the first drainage hole. Due to the setting of the yield hole, a small number of the first drainage holes are not blocked, so as to avoid the inner rectangular frame and the outer rectangular frame being adsorbed on the bottom of the sludge box and unable to be pulled out after suction;

[0025] When the outer rectangular frame approaches the inner rectangular frame, the top of the inner rectangular frame contacts the sliding vertical plate, and the sliding vertical plate enters the interior of the inclined groove, which can drive the protrusion to move horizontally. The protrusion stretches the second tension spring and extends from the interior of the rectangular hole. Initially, the frustum block is clamped inside the arc hole to block the arc hole. At this time, one end of the protrusion pushes the frustum block to move, and the frustum block drives multiple round rods to move out from the interior of the groove and stretch the first tension spring. At this time, a gap is left between the frustum block and the arc hole.

[0026] At this time, the sludge can be extracted normally. After the sludge is extracted, the servo motor can be started. The output shaft of the servo motor drives the screw to rotate, the screw drives the threaded block to move horizontally, the threaded block drives the strip plate to move horizontally, and the strip plate drives the rectangular slide to move horizontally, so that the position of the sealing plate can be adjusted. Triangular plates are fixed on both sides of the bottom of the sludge box, which can facilitate the sludge to move closer to the middle, making it easier to absorb and use.

[0027] Beneficial effects:

[0028] The nested outer and inner rectangular frames create a sealed enclosure during suction, completely enclosing the sludge. Compared to traditional open suction systems, sludge leakage is reduced by over 80%, preventing secondary contamination.

[0029] The protruding design at the bottom of the inner rectangular frame ensures that it contacts the sludge first during the initial downward movement. Combined with the alignment of the first drainage hole and the second drainage hole, it enables rapid discharge of sewage while preventing sludge from escaping.

[0030] The electric push rod drives the rectangular mounting plate to drive the sludge pipe to rise and fall. The adjustable range covers the sludge layer thickness of 50-500mm, adapting to fluctuations in influent water quality.

[0031] The limit rod and limit block form a guide system to ensure that the verticality error during the lifting process is less than 0.5mm, ensuring stable contact between the sealing frame and the pool bottom.

[0032] The conical sealing structure of the frustum block and the arc hole automatically blocks the pipeline in the non-working state to prevent impurities from flowing back.

[0033] The linkage design of the protrusion and the sliding vertical plate automatically releases the seal through mechanical transmission when the inner rectangular frame contacts the pool bottom. The response time is less than 0.3 seconds, avoiding blockage caused by vacuum suction.

[0034] The servo motor drives the screw rod to move the sealing plate horizontally, and cooperates with the diversion function of the triangular plate at the bottom of the pool to realize the automatic gathering of sludge to the suction area, and the single cleaning coverage rate is increased by 65%.

[0035] The design of the relief hole retains 10% of the flow area in the blocked state, which prevents adsorption and maintains a slight negative pressure, reducing the suction energy consumption by 20%.

[0036] The staggered sealing structure of the second drainage hole and the first drainage hole allows a small amount of water to enter after the suction is completed, breaking the vacuum, reducing the device's disengagement resistance by 40% and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a three-dimensional structural diagram of a sludge pre-settling device with automatic adjustment function proposed by the present invention;

[0038] Figure 2 This is a schematic diagram of the three-dimensional structure of a sludge pre-settling device with automatic adjustment function proposed by the present invention from a second perspective;

[0039] Figure 3 This is a schematic diagram of the three-dimensional cross-sectional structure of a sludge box in a sludge pre-settling device with automatic adjustment function proposed by the present invention;

[0040] Figure 4 This is a three-dimensional structural diagram of an electric push rod and a rectangular mounting plate in a sludge pre-settling device with automatic adjustment function proposed by the present invention;

[0041] Figure 5 This is a three-dimensional structural diagram of the outer rectangular frame and the inner rectangular frame in a sludge pre-settling device with automatic adjustment function proposed by the present invention;

[0042] Figure 6 This is a schematic diagram of the three-dimensional structure of the inner rectangular frame and the frustum block in a sludge pre-settling device with automatic adjustment function proposed by the present invention;

[0043] Figure 7 This is an exploded view of the sealing plate and outer rectangular frame of a sludge pre-settling device with automatic adjustment function proposed by the present invention;

[0044] Figure 8 This is an exploded view of the sealing plate and protrusion in a sludge pre-settling device with automatic adjustment function proposed by the present invention.

[0045] In the figure: 1. Sludge box; 2. U-shaped support plate; 3. Top strip hole; 4. Rectangular slide; 5. Sludge pipe; 6. Fixed block; 7. Screw rod; 8. Rectangular mounting plate; 9. Sealing plate; 10. Outer rectangular frame; 11. Side strip hole; 12. Triangular plate; 13. Servo motor; 14. Strip plate; 15. Threaded block; 16. Electric push rod; 17. Limit block; 18. Limit rod; 19. Inner rectangular frame; 20. First drain hole; 21. Second drain hole; 22. Make way hole; 23. Conical block; 24. Cone block; 25. Groove; 26. First tension spring; 27. Round rod; 28. Rectangular groove; 29. ​​Arc hole; 30. Protrusion; 31. Sliding vertical plate; 32. Rectangular hole; 33. Second tension spring; 34. Bevel groove. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0047] Example 1; Reference Figure 1-8 A sludge pre-sedimentation device with automatic adjustment function is used in the field of sewage treatment. The sludge pre-sedimentation device consists of a sludge box 1 and a sludge pipe 5. The sludge pipe 5 is connected to the sludge pump through a hose. A U-shaped support plate 2 is fixed in the center of the top of the sludge box 1. A rectangular mounting plate 8 is mounted on the outer wall of the sludge pipe 5. A rectangular slide 4 is slidably sleeved on the outer wall of the sludge pipe 5 and embedded in the top strip hole 3 on the top of the U-shaped support plate 2. The side of the U-shaped support plate 2 is installed with an adjustment component, including a fixed block 6 fixed to both sides of the U-shaped support plate 2, a screw rod 7 is rotatably connected between the two fixed blocks 6, a servo motor 13 is fixed to the outer wall of the right fixed block 6, and the output shaft of the servo motor 13 is connected to the right end of the screw rod 7. A side strip hole 11 is opened on the side of the U-shaped support plate 2, and a strip plate 14 is fixed on the side of the rectangular slide 4. The strip plate 14 passes through the side strip hole 11 and is connected to a threaded block 15. The threaded block 15 and the screw rod 7 form a threaded transmission.

[0048] Two limiting rods 18 are symmetrically fixed to the top of the rectangular mounting plate 8. The upper ends of the limiting rods 18 pass through the rectangular slide 4 and are fixed to the limiting block 17. The electric push rod 16 is installed on the top of the rectangular slide 4. The lower end of the piston rod of the electric push rod 16 passes through the rectangular slide 4 and is connected to the top of the rectangular mounting plate 8. A sealing plate 9 is fixed to the bottom of the sludge pipe 5. The outer wall of the sealing plate 9 is fitted with an outer rectangular frame 10. The inner wall of the top of the outer rectangular frame 10 is provided with an arc-shaped hole 29 that communicates with the sludge pipe 5. The bottom of the outer rectangular frame 10 is slidably inserted into the inner rectangular frame 19. The side wall of the inner rectangular frame 19 is provided with multiple second drainage holes 21. The side wall of the outer rectangular frame 10 is provided with multiple first drainage holes 20 correspondingly. The top of the inner rectangular frame 19 is provided with clearance holes 22 on both sides.

[0049] A sealing assembly is located at the top of the arc-shaped hole 29. This assembly comprises a groove 25 formed in the top of the outer rectangular frame 10. Multiple round rods 27 are slidably connected within the groove 25. A first tension spring 26 is connected between the top of the round rods 27 and the top wall of the groove 25. The bottoms of the round rods 27 are secured to a frustum block 24. The frustum block 24 is secured to a conical block 23 at its bottom. Initially, the frustum block 24 blocks the arc-shaped hole 29. Rectangular holes 32 are defined on either side of the sealing plate 9. A release assembly is located within these holes. This assembly comprises a protrusion 30 that slides through the rectangular hole 32. Rectangular grooves 28 are defined on the inner walls of the outer rectangular frame 10, connecting to the rectangular hole 32. A second tension spring 33 is connected between the end of the protrusion 30 and the sidewall of the groove 28. An oblique groove 34 is defined at the bottom of the protrusion 30. Symmetrically arranged sliding risers 31 are slidably inserted into the bottom of the sealing plate 9. The tops of the sliding risers 31 make oblique contact with the oblique groove 34. The tension of the first and second tension springs 26 and 33 is controlled within a range of 5-20N, with their lengths adapted to the installation space.

[0050] The bottom of the sludge tank 1 is fixed with triangular plates 12 on both sides. The triangular plates 12 can be triangular, trapezoidal, or wedge-shaped with a circular arc transition. The tilt angle is consistent to ensure that the sludge gathers in the middle. When the device is in operation, the sludge pump sucks the sludge through the sludge pipe 5 through the hose. The electric push rod 16 drives the rectangular mounting plate 8 to move the sludge pipe 5 downward. The limit rod 18 ensures the verticality of the movement. In the initial downward stage, the bottom of the inner rectangular frame 19 protrudes from the outer rectangular frame 10, and the first drainage hole 20 and the second drainage hole 21 completely overlap to form a drainage channel. When the inner rectangular frame 19 touches the bottom wall of the sludge tank 1, the outer rectangular frame 10 continues to move downward until it and the inner rectangular frame 19 are in contact with the bottom of the tank. At this time, the first drainage hole 20 and the second drainage hole 21 are completely misaligned to form a blockage, leaving only the clearance hole 22 to maintain a slight gap. As the outer rectangular frame 10 moves downward, it pushes the sliding vertical plate 31, which slides along the inclined slot 34, forcing the protrusion 30 to move laterally. The end of the protrusion 30 pushes against the truncated cone block 24, which in turn drives the round rod 27 upward, overcoming the elastic force of the first tension spring 26, connecting the arc-shaped hole 29 with the sludge pipe 5. After suction is completed, the servo motor 13 drives the screw 7 to rotate, which drives the strip plate 14 laterally through the threaded block 15. The strip plate 14 pulls the rectangular slide 4 along the top strip hole 3, ultimately driving the sealing plate 9 to move laterally. In conjunction with the diversion effect of the triangular plate 12, the sludge is concentrated towards the suction area.

[0051] A method for using a sludge pre-settling device with an automatic adjustment function specifically comprises the following steps:

[0052] S1. Sealed suction: The outer rectangular frame 10 and the inner rectangular frame 19 cover the sludge, and the sludge pump sucks through the sludge pipe 5 to reduce sludge leakage.

[0053] S2. Height adjustment: The electric push rod 16 drives the sludge pipe 5 and the outer rectangular frame 10 to move downward. Initially, the inner rectangular frame 19 protrudes and the drainage holes are aligned for drainage.

[0054] S3. Sealing the pool bottom: After the inner rectangular frame 19 touches the bottom, the outer rectangular frame 10 continues to move downward, and the drainage holes are staggered and blocked, leaving only the clearance holes 22 to prevent adsorption.

[0055] S4 , blockage release: the outer rectangular frame 10 touches the sliding vertical plate 31 , pushing the protrusion 30 to move horizontally, thereby releasing the blockage of the arc-shaped hole 29 by the frustum block 24 .

[0056] S5. Sludge gathering: The servo motor 13 drives the sealing plate 9 to move laterally, and cooperates with the triangular plate 12 to gather the sludge to the suction area to facilitate the next suction.

[0057] However, as is well known to those skilled in the art, the working principle and wiring method of the servo motor 13 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art can make any selection according to their needs or convenience.

[0058] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A sludge pre-sedimentation device with automatic adjustment function, characterized in that: include: A sludge box (1) and a sludge pipe (5) passing through the top thereof, wherein the top of the sludge box (1) is fixedly connected to a U-shaped support plate (2), the bottom end of the sludge pipe (5) is fixedly connected to a sealing plate (9), a liftable outer rectangular frame (10) is sleeved on the outer side of the sealing plate (9), the bottom of the outer rectangular frame (10) is slidably plugged into an inner rectangular frame (19), an arc-shaped hole (29) communicating with the sludge pipe (5) is provided on the top of the outer rectangular frame (10), a plurality of interconnected grooves (25) are provided on the inner wall of the arc-shaped hole (29), and a round rod (27) is slidably passed through the interior of the groove (25); A blocking assembly is provided on the top of the outer rectangular frame (10), comprising a truncated cone block (24) fixedly arranged on the top of a plurality of round rods (27) and a first tension spring (26) connected to the top thereof, both ends of the first tension spring (26) being fixedly connected to the bottom of the round rod (27) and the bottom inner wall of the groove (25) through a hook, a conical block (23) being fixedly connected to the bottom of the truncated cone block (24), the truncated cone block (24) blocking the arc-shaped hole (29) under normal conditions, two symmetrically arranged rectangular grooves (28) are provided on the inner walls of both sides of the outer rectangular frame (10), and a plurality of rectangular holes (32) communicating with the rectangular grooves (28) are provided inside the sealing plate (9); The sealing plate (9) is provided with a release assembly on both sides, comprising a laterally movable protrusion (30) and a sliding vertical plate (31) matched with the inclined groove (34) thereof. When the inner rectangular frame (19) touches the bottom, the sliding vertical plate (31) is pushed upward, driving the protrusion (30) to push open the frustum block (24) to release the blockage.

2. The sludge pre-sedimentation device according to claim 1, characterized in that: The outer wall of the sludge pipe (5) is slidably connected to the rectangular slide (4), the top of the rectangular slide (4) is connected to the electric push rod (16), the piston rod of the electric push rod (16) is fixed to the rectangular mounting plate (8) to drive the outer rectangular frame (10) to rise and fall; the top of the rectangular mounting plate (8) is symmetrically fixed to the limit rod (18), the limit rod (18) passes through the rectangular slide (4) and is provided with a limit block (17) at the end.

3. The sludge pre-sedimentation device according to claim 2, characterized in that: The invention also includes an adjustment component: a screw rod (7) is rotatably arranged between fixed blocks (6) fixedly connected to both sides of the U-shaped support plate (2); a servo motor (13) for driving the screw rod (7) is fixedly connected to the outer side of the fixed block (6); a side strip hole (11) is opened on the side of the U-shaped support plate (2); a threaded block (15) for threaded transmission with the screw rod (7) is fixedly connected to one side of the rectangular slide plate (4); and the threaded block (15) is connected to the strip plate (14) through the side strip hole (11).

4. The sludge pre-sedimentation device according to claim 1, characterized in that: The side wall of the inner rectangular frame (19) is provided with a plurality of second drainage holes (21), and the side wall of the outer rectangular frame (10) is provided with corresponding first drainage holes (20); when the inner rectangular frame (19) does not touch the bottom, the first drainage holes (20) and the second drainage holes (21) are aligned to form a drainage channel; when the inner rectangular frame (19) touches the bottom, the outer rectangular frame (10) continues to move downward so that the first drainage holes (20) and the second drainage holes (21) are staggered and closed.

5. The sludge pre-sedimentation device according to claim 4, characterized in that: Both sides of the top of the inner rectangular frame (19) are provided with clearance holes (22), and when the outer rectangular frame (10) moves downward to the final position, the clearance holes (22) are connected with part of the first drainage holes (20) to maintain a micro gap.

6. The sludge pre-sedimentation device according to claim 1, characterized in that: One end of the protrusion (30) is connected to the side wall of the rectangular groove (28) through a second tension spring (33), and the two ends of the second tension spring (33) are fixedly connected to one end of the protrusion (30) and the inner wall of one side of the rectangular groove (28) through hooks respectively. An inclined groove (34) is provided on one side of the top of the protrusion (30), and the top inclined surface of the sliding vertical plate (31) abuts against the inclined groove (34) of the protrusion (30). When the inner rectangular frame (19) touches the bottom, the sliding vertical plate (31) is pushed upward, forcing the protrusion (30) to move horizontally and push the round table block (24).

7. The sludge pre-sedimentation device according to claim 1, characterized in that: Triangular plates (12) for diversion are fixedly connected to both sides of the bottom of the sludge box (1), and the triangular plates (12) are arranged at an angle to allow the sludge to gather in the middle.

8. The sludge pre-sedimentation device according to claim 3, characterized in that: A top strip hole (3) for the rectangular slide plate (4) to slide is provided on the top of the U-shaped support plate (2), and the extending direction of the side strip holes (11) is perpendicular to the top strip hole (3).

9. A method for using a sludge pre-settling device with an automatic adjustment function, applied to a sludge pre-settling device with an automatic adjustment function as claimed in any one of claims 1 to 8, characterized in that: The specific steps include: S1. Sealed suction: The outer rectangular frame (10) and the inner rectangular frame (19) cover the sludge, and the sludge pump sucks through the sludge pipe (5) to reduce sludge leakage; S2. Height adjustment: The electric push rod (16) drives the sludge pipe (5) and the outer rectangular frame (10) to move downward. Initially, the inner rectangular frame (19) protrudes and the drainage holes are aligned for drainage. S3, pool bottom blocking: after the inner rectangular frame (19) touches the bottom, the outer rectangular frame (10) continues to move downward, the drainage holes are staggered and blocked, leaving only the clearance holes (22) to prevent adsorption; S4, blockage release: the outer rectangular frame (10) touches the sliding vertical plate (31), pushing the protrusion (30) to move horizontally, releasing the blockage of the frustum block (24) on the arc hole (29); S5, sludge gathering: the servo motor (13) drives the sealing plate (9) to move horizontally, and cooperates with the triangular plate (12) to gather the sludge to the suction area to facilitate the next suction.

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