Central drive type suction and scraping dredger

Abstract

The utility model relates to sewage treatment technical field discloses center drive type scrape suction mud machine, including treatment pond, the bottom fixedly connected with undercarriage of treatment pond, the inside of undercarriage is provided with motor, the output fixedly connected with rotary lever of motor, the inside of treatment pond is provided with outer tube, the top fixedly connected in the inside top of outer tube of rotary lever, the top of treatment pond is provided with truss, the bottom fixedly connected with sleeve of truss. The utility model discloses motor, outer tube, truss can solve the problem that the equipment not only cannot realize normal rotation, but also will cause structural damage and operation accident, and improve the replacement and maintenance cost, through the stability and accuracy of guaranteeing truss in the process of circular motion, thereby effectively reduce the failure probability of drive system and structural frame, prolong the maintenance cycle and service life of whole equipment.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a center-driven scraper-suction sludge machine. Background Technology

[0002] Center-driven scraper-suction sludge removers are important equipment used in water treatment processes for sludge removal from sedimentation tanks. In urban wastewater treatment, sedimentation tanks are commonly used treatment facilities, requiring efficient equipment to remove sludge settled at the bottom of the tank and skim off scum from the surface. Center-driven scraper-suction sludge removers were developed to meet the sludge removal needs of circular sedimentation tanks.

[0003] In a sludge scraper, the scraper blades at the bottom of the equipment rely on a rotating mechanism to move in a circular motion around the center axis along the bottom of the tank. This is necessary to gradually scrape the sludge settled around the periphery of the sedimentation tank towards the sludge collection pit in the center of the tank. When the drive device is idle, the scraper truss, scraper blades, and other working parts are completely stationary, causing all scraping, suction, and skimming functions to fail. The sludge will accumulate at the bottom of the tank and cannot be cleaned. This not only prevents the equipment from rotating normally but also causes structural damage and operational accidents, and increases replacement and maintenance costs. When treating wastewater, the unidirectional scraper and suction mechanism can only push sludge and simultaneously suction and discharge it through the tilt angle of the scraper blade when the equipment rotates in a single direction, such as clockwise. When rotating in reverse, the scraper blade will slip and fail to push the sludge, and the suction pipe will also fail due to the mismatch in flow direction. If there are local sludge accumulation areas in the sedimentation tank due to uneven water distribution and water flow disturbance, the sludge in these areas will continue to accumulate and harden, gradually encroaching on the effective volume of the sedimentation tank. This will cause the scraper blade to wear and deform too quickly on one side, requiring frequent replacement. Some areas have too much sludge, while other areas are not cleaned enough, affecting the efficiency of wastewater treatment. Utility Model Content

[0004] The main purpose of this utility model is to provide a center-driven scraper and suction sludge machine, which can effectively solve the problems that cause the equipment to not only fail to rotate normally, but also cause structural damage and operational accidents, increase replacement and maintenance costs, and cause the scraper blades to wear and deform too quickly on one side, requiring frequent replacement, and cause excessive sludge in some areas while other areas are not cleaned enough, thus affecting the efficiency of sewage treatment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a center-driven scraper-suction sludge machine, comprising a treatment tank, a base frame fixedly connected to the bottom of the treatment tank, a motor installed inside the base frame, a rotating rod fixedly connected to the output end of the motor, an outer cylinder installed inside the treatment tank, the top end of the rotating rod fixedly connected to the inner top end of the outer cylinder, a truss installed at the top of the treatment tank, a sleeve fixedly connected to the bottom of the truss, the top end of the outer cylinder fixedly connected to the inside of the sleeve, a first fixing plate fixedly connected to the outer side of the top of the treatment tank, and a slide rail fixedly connected to the top of the first fixing plate.

[0006] Furthermore, the bottom wall of the truss is fixedly connected to the left and right sides of the bottom wall with a second fixing plate. The bottom wall of each second fixing plate is rotatably connected to two connecting frames. Each connecting frame is rotatably connected to a pulley. The four pulleys are slidably connected to the top of the slide rail.

[0007] Furthermore, a control panel is fixedly connected to the front side wall of the treatment pool, a first connecting ring is fixedly connected to the outer bottom of the outer cylinder, and placement plates are fixedly connected to the left and right sides of the outer side of the first connecting ring. Support frames are fixedly connected to the top front and rear sides of the two placement plates.

[0008] Furthermore, the tops of the four support frames are fixedly connected to the bottom wall of the truss, and a double-suction pump is provided at the top of the truss. The left and right input ends of the double-suction pump are fixedly connected to the first connecting pipes. The bottom ends of the two first connecting pipes penetrate the interior of the truss and are connected to the first conveying pipe. The front inner sidewalls of the two placement plates are fixedly connected to the inclined plates.

[0009] Furthermore, the bottom ends of the two first conveying pipes are connected to a second connecting pipe, the bottom of the two second connecting pipes are fixedly connected to the top of the two first connecting rings, the front sides of the two placement plates are fixedly connected to a guide block, and the bottom walls of the two second connecting pipes are connected to a sewage inlet pipe through the interior of the placement plate.

[0010] Furthermore, each of the inlet pipes is located in the middle of the rear side of the two guide blocks, and a shovel plate is fixedly connected to the rear interior of the two placement plates. The rear side walls of the two second connecting pipes are connected to a transfer pipe, and the bottom of the two transfer pipes penetrates the rear interior of the placement plate and is located at the top of the shovel plate.

[0011] Furthermore, a support plate is fixedly connected to the right side of the front side wall of the truss, and a second conveying pipe is fixedly connected to the output end of the double suction pump. The bottom wall of the second conveying pipe is fixedly connected to the top of the support plate, and the other end of the second conveying pipe is connected to a sewage pipe, which is located on the outside of the first fixed plate.

[0012] Furthermore, a second connecting ring is fixedly connected to the outer top of the outer cylinder, and a connecting rod is fixedly connected to the outer side of each of the second connecting rings. A scraper is fixedly connected to the other side of each of the two connecting rods, and the outer sidewalls of the two scrapers are correspondingly arranged with the inner sidewall of the treatment tank.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model, through its motor, outer cylinder, truss, fixed plate, slide rail, connecting frame, and pulleys, solves the problems that prevent equipment from rotating normally, leading to structural damage and operational accidents, and increasing replacement and maintenance costs. By ensuring the stability and accuracy of the truss during circular motion, the equipment achieves guidance and support through the coordinated use of multiple structures. The first fixed plate, fixedly connected to the outer side of the top of the treatment tank, provides a stable mounting base for the slide rail, which is arranged in a ring around the outer perimeter of the top of the treatment tank. The connecting frame and internal pulleys, rotatably connected to the second fixed plates on the left and right sides of the truss bottom wall, slide precisely at the top of the slide rail, thereby effectively reducing the probability of failure of the drive system and structural frame, reducing frictional wear of rotating parts, and extending the maintenance cycle and service life of the entire equipment.

[0015] 2. By incorporating a first connecting ring, a double-suction pump, an inclined plate, a transfer pipe, a sewage pipe, a connecting rod, and a scraper, the system effectively addresses the problems of rapid wear and deformation on one side of the scraper, requiring frequent replacements, excessive sludge in some areas, and insufficient cleaning in others, thus affecting wastewater treatment efficiency. The shovel plate behind the scraper reaches deep into the dead corners of the tank bottom, loosening the hardened sludge and achieving thorough cleaning of the tank bottom without any blind spots, in conjunction with the scraper plate. During this process, pulleys on the second fixed plates on both sides of the truss bottom roll smoothly along the slide rail at the top of the treatment tank, strictly limiting the truss's movement trajectory and ensuring that the scraper plate and shovel plate remain in contact with the tank bottom, guaranteeing scraping efficiency. This effectively covers a larger area, reduces sludge accumulation, ensures more stable and efficient operation of the wastewater treatment system, and improves wastewater sedimentation.

[0016] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the center-driven scraper-suction sludge machine proposed in this utility model;

[0018] Figure 2 This is a cross-sectional view of the internal structure of the treatment tank of the center-driven scraper-suction sludge machine proposed in this utility model.

[0019] Figure 3 This is a cross-sectional view of the inner structure of the outer cylinder of the center-driven scraper-suction sludge machine proposed in this utility model;

[0020] Figure 4 This is a structural diagram of the support frame for the center-driven scraper-suction sludge machine proposed in this utility model;

[0021] Figure 5 This is a diagram of the pulley structure of the center-driven scraper-suction sludge machine proposed in this utility model;

[0022] Figure 6 This is a rear structural diagram of the center-driven scraper-suction sludge machine proposed in this utility model;

[0023] Figure 7 This is a schematic diagram of the second connecting pipe of the center-driven scraper-suction sludge machine proposed in this utility model;

[0024] Figure 8 This is a structural diagram of the guide block of the center-driven scraper-suction sludge machine proposed in this utility model;

[0025] Figure 9 This is a structural diagram of the shovel plate of the center-driven scraper-suction sludge machine proposed in this utility model.

[0026] Legend:

[0027] 1. Treatment tank; 2. Base frame; 3. Motor; 4. Rotating rod; 5. Outer cylinder; 6. Truss; 7. Sleeve; 8. First fixed plate; 9. Slide rail; 10. Second fixed plate; 11. Connecting frame; 12. Pulley; 13. Control panel; 14. First connecting ring; 15. Placement plate; 16. Support frame; 17. Double suction pump; 18. First connecting pipe; 19. First conveying pipe; 20. Second connecting pipe; 21. Inclined plate; 22. Guide block; 23. Sewage inlet pipe; 24. Shovel plate; 25. Transfer pipe; 26. Support plate; 27. Second conveying pipe; 28. Sewage outlet pipe; 29. ​​Second connecting ring; 30. Connecting rod; 31. Scraper. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0029] like Figure 1 - Figure 6As shown: A center-driven scraper-suction sludge machine includes a treatment tank 1. A base frame 2 is fixedly connected to the bottom of the treatment tank 1. A motor 3 is installed inside the base frame 2. The base frame 2 at the bottom of the treatment tank 1 provides bottom support for the entire equipment and also provides external protection for the motor 3 inside. A rotating rod 4 is fixedly connected to the output end of the motor 3. An outer cylinder 5 is installed inside the treatment tank 1. The top end of the rotating rod 4 is fixedly connected to the inner top end of the outer cylinder 5. When the motor 3 is started, the output end of the motor 3 drives the rotating rod 4, which is fixedly connected to it, to rotate synchronously. Since the top end of the rotating rod 4 is fixedly connected to the inner top end of the outer cylinder 5, the rotational force of the rotating rod 4 is directly transmitted to the outer cylinder 5, thereby driving the outer cylinder 5 to rotate around the center of the treatment tank 1.

[0030] A truss 6 is installed at the top of the treatment pool 1. A sleeve 7 is fixedly connected to the bottom of the truss 6. The top of the outer cylinder 5 is fixedly connected to the inside of the sleeve 7. A first fixed plate 8 is fixedly connected to the outer side of the top of the treatment pool 1. A slide rail 9 is fixedly connected to the top of the first fixed plate 8. Second fixed plates 10 are fixedly connected to the left and right sides of the bottom wall of the truss 6. Two connecting frames 11 are rotatably connected to the bottom wall of each second fixed plate 10. A pulley 12 is rotatably connected inside each connecting frame 11. Four pulleys 12 are slidably connected to the top of the slide rail 9. The top of the outer cylinder 5 is fixedly connected to the inside of the sleeve 7 at the bottom of the truss 6. The rotation of the outer cylinder 5 will cause the sleeve 7 and the truss 6 to rotate together around the center of the treatment pool 1. During this process, the second fixed plates 10 on the left and right sides of the bottom wall of the truss 6 move synchronously with the truss 6. The two connecting frames 11 rotatably connected to the bottom wall of each second fixed plate 10 also move accordingly. The pulleys 12 inside the connecting frames 11 slide on the slide rail 9 on the top of the first fixed plate 8 on the outer side of the top of the treatment pool 1. The slide rail 9 provides a fixed movement trajectory for the pulley 12. The cooperation between the pulley 12 and the slide rail 9 not only bears the weight of the truss 6, but also effectively reduces rotational friction and ensures that the truss 6 runs smoothly.

[0031] like Figure 1 - Figure 8 As shown, a control panel 13 is fixedly connected to the front wall of the treatment tank 1. A first connecting ring 14 is fixedly connected to the outer side of the bottom end of the outer cylinder 5. Placement plates 15 are fixedly connected to the left and right sides of the outer side of the first connecting ring 14. Support frames 16 are fixedly connected to the front and rear sides of the top of the two placement plates 15. The top of the four support frames 16 is fixedly connected to the bottom wall of the truss 6. The first connecting ring 14 fixed to the outer side of the bottom end of the outer cylinder 5 rotates synchronously with the outer cylinder 5, causing the placement plates 15 fixed to the left and right sides of its outer side to rotate. The support frames 16 fixed to the front and rear sides of the top of the placement plates 15 transmit the rotational force to the truss 6. At the same time, the top of the outer cylinder 5 is fixedly connected to the sleeve 7 at the bottom of the truss 6. The double connection ensures the stable rotation of the truss 6 and provides support for the placement plates 15 at the top through the support frames 16.

[0032] A double-suction pump 17 is installed at the top of the truss 6. First connecting pipes 18 are fixedly connected to the left and right input ends of the double-suction pump 17. The bottom ends of both first connecting pipes 18 penetrate the interior of the truss 6 and are connected to a first conveying pipe 19. Inclined plates 21 are fixedly connected to the inner front walls of both placement plates 15. When the double-suction pump 17 is powered on and started, the negative pressure generated by the double-suction pump 17 first acts on the first connecting pipes 18 fixedly connected to its left and right input ends. Since the bottom ends of the first connecting pipes 18 penetrate the interior of the truss 6 and are connected to the first conveying pipe 19, the negative pressure is transmitted downwards along the first connecting pipes 18 to the first conveying pipe 19.

[0033] Subsequently, the negative pressure continues to be transmitted downwards through the first delivery pipe 19 until it reaches the second connecting pipe 20, which is connected to the bottom of the first delivery pipe 19. At this point, the bottom of the second connecting pipe 20 is fixedly connected to the top of the first connecting ring 14, and the negative pressure is stably established within the second connecting pipe 20, creating the necessary suction conditions for the subsequent sewage suction pipeline system.

[0034] like Figure 1 - Figure 9 As shown, the bottom ends of the two first conveying pipes 19 are connected to second connecting pipes 20. The bottoms of the two second connecting pipes 20 are fixedly connected to the tops of the two first connecting rings 14. Guide blocks 22 are fixedly connected to the interior of the front sides of the two placement plates 15. Inlet pipes 23 are connected to the bottom walls of the two second connecting pipes 20, penetrating the interior of the placement plates 15. Each inlet pipe 23 is located in the middle of the rear side of the two guide blocks 22, and pre-guidance is achieved through inclined plates 21 fixed to the inner side of the front side of the placement plates 15. The inclined plates 21 are set at an inclined angle. When the waste approaches the front side of the placement plate 15, it will slide towards the middle area of ​​the placement plate 15 along the inclined direction of the inclined plate 21 during device operation, achieving initial collection of waste. Simultaneously, the guide blocks 22 fixedly connected to the interior of the front side of the placement plates 15 further guide the collected waste. The two guide blocks 22 are symmetrically distributed, and their inclined surfaces accurately guide the initially collected waste to the middle position of their rear sides, allowing the wastewater to enter the interior of the inlet pipes 23.

[0035] Two placement plates 15 are fixedly connected to the rear interior of each other with shovel plates 24. The rear walls of the two second connecting pipes 20 are connected to transfer pipes 25, the bottoms of which penetrate the rear interior of the placement plates 15 and are positioned at the top of the shovel plates 24. When the device rotates in the reverse direction, the motor 3 drives the entire assembly to rotate counterclockwise. The shovel plates 24, fixed to the rear interior of the placement plates 15, actively scoop up the hardened sludge and lumpy sediments on the reverse path at the bottom of the treatment tank 1 as the placement plates 15 rotate in the reverse direction. This type of sludge is difficult to guide through the guide block 22 and needs to be actively broken up and scooped up. The transfer pipes 25 are connected to the rear wall of the second connecting pipes 20, and their bottoms penetrate the rear interior of the placement plates 15, directly facing the top of the shovel plates 24. Under the negative pressure of the double suction pump 17, the transfer pipes 25 directly suck in the sludge scooped up by the shovel plates 24.

[0036] like Figure 1 - Figure 9 As shown, a support plate 26 is fixedly connected to the right side of the front wall of the truss 6, and a second conveying pipe 27 is fixedly connected to the output end of the double suction pump 17. The bottom wall of the second conveying pipe 27 is fixedly connected to the top of the support plate 26. The support plate 26 fixed to the right side of the front wall of the truss 6 supports and fixes the bottom wall of the second conveying pipe 27, preventing it from shaking and twisting when the truss 6 rotates.

[0037] The other end of the second conveying pipe 27 is connected to a sewage discharge pipe 28, which is located outside the first fixed plate 8. After the two streams of sludge converge in the first conveying pipe 19, they enter the double-suction pump 17 through the first connecting pipe 18. The double-suction pump 17 conveys the sludge to the sewage discharge pipe 28 through the second conveying pipe 27 at its output end, and finally discharges it through the sewage discharge pipe 28.

[0038] A second connecting ring 29 is fixedly connected to the outer side of the top of the outer cylinder 5. A connecting rod 30 is fixedly connected to the outer side of the second connecting ring 29. A scraper 31 is fixedly connected to the other side of the two connecting rods 30. The outer side wall of the two scrapers 31 is correspondingly set to the inner side wall of the treatment tank 1. The second connecting ring 29 fixed to the outer side of the top of the outer cylinder 5 rotates synchronously, which drives the connecting rod 30 fixed to its outer side and the scraper 31 fixed to the other end of the connecting rod 30 to rotate. The outer side wall of the scraper 31 is in contact with the inner side wall of the treatment tank 1. With the rotation, the scraper 31 is cleaned of the sludge on the tank wall. The scraper 31 rotates close to the inner side wall of the treatment tank 1, scraping the sludge attached to the tank wall to the bottom of the tank.

[0039] It should be noted that this utility model is a center-driven scraper and suction sludge machine. First, the motor 3, control panel 13, and double suction pump 17 are connected to an external power source to supply power to the device.

[0040] The power source for the equipment is a motor 3 fixed inside the base frame 2 at the bottom of the treatment tank 1. When the equipment starts, the motor 3 converts electrical energy into mechanical energy, and the torque generated at its output end is directly transmitted to the rotating rod 4 fixedly connected to it, causing the rotating rod 4 to rotate at a constant speed around its own axis. Since the top of the rotating rod 4 is fixedly connected to the top of the inner end of the outer cylinder 5, the rotation of the rotating rod 4 will synchronously drive the outer cylinder 5 to rotate as well. At the same time, the top of the outer cylinder 5 is fixedly connected to the inside of the sleeve 7 at the bottom of the truss 6, and the rotational torque of the outer cylinder 5 is further transmitted to the truss 6, ultimately causing the truss 6 to perform circular motion around the axis of the rotating rod 4, providing the power basis for the subsequent sludge scraping and suction operation.

[0041] As the core load-bearing component of the equipment, truss 6 typically has scraper blades installed radially at intervals at its bottom. When truss 6 moves in a circular motion under power, the scraper blades at the bottom rotate synchronously. The scraper blades are designed to fit against the bottom of treatment tank 1 at an angle. During operation, the scraper blades exert a continuous pushing and scraping force on the sludge deposited at the bottom of the tank, loosening and peeling off the originally compacted and dispersed sludge, and pushing it towards the center area of ​​treatment tank 1 along the slope of the bottom. In this process, the stable rotation of truss 6 directly determines the uniformity and efficiency of the scraping by the scraper blades, avoiding localized sludge residue.

[0042] To ensure the stability and accuracy of the truss 6 during its circular motion, the equipment employs multiple structural components for guidance and support. The first fixed plate 8, fixedly connected to the outer side of the top of the treatment tank 1, provides a stable mounting base for the slide rail 9, which is arranged in a ring around the outer perimeter of the top of the treatment tank 1. The connecting frame 11 and internal pulleys 12, rotatably connected to the second fixed plates 10 on the left and right sides of the bottom wall of the truss 6, are precisely slidably connected to the top of the slide rail 9. When the truss 6 operates, the four pulleys 12 roll synchronously along the slide rail 9, bearing the weight of the truss 6 and the sludge scraping and suction components, reducing operating resistance. Furthermore, the guiding effect of the slide rail 9 strictly limits the movement trajectory of the truss 6, preventing deviation or swaying during rotation, ensuring the sludge scraper always remains in contact with the tank bottom, and avoiding structural damage due to uneven loading, thus guaranteeing long-term stable operation of the equipment.

[0043] As the core hub for power transmission, the outer cylinder 5 distributes torque to various working components through multiple rigid connection structures: First, the top of the outer cylinder 5 is nested in the sleeve 7 at the bottom of the truss 6, directly driving the truss 6 to perform circular motion around the rotating rod 4; Second, the first connecting ring 14 on the outer side of the bottom end of the outer cylinder 5 is fixed to the bottom wall of the truss 6 through the placement plates 15 on the left and right sides and the support frame 16 at the top, forming a reinforced support structure of "outer cylinder - connecting ring - placement plate - support frame - truss", which not only enhances the stability of power transmission, but also provides a solid foundation for the truss 6 to support the double suction pump 17 and various pipelines; Third, the second connecting ring 29 on the outer side of the top end of the outer cylinder 5 drives the scraper 31 to rotate synchronously through the connecting rod 30, so that the scraper 31 runs in close contact with the inner wall of the treatment tank 1, completely removing the sludge attached to the tank wall and preventing scale buildup on the tank wall.

[0044] During the coordinated operation of the truss 6 and the placement plate 15, the cleaning of sludge at the bottom of the pool is carried out simultaneously. The scraper at the bottom of the truss 6 adheres to the bottom of the pool and pushes the sludge towards the center along the slope of the pool bottom as the truss moves in a circular motion. At the same time, the shovel 24 on the rear side of the placement plate 15 penetrates into the dead corners of the pool bottom, shoveling up and loosening the hardened sludge, thus achieving thorough cleaning of the sludge at the bottom of the pool in conjunction with the scraper. During this process, the pulleys 12 on the second fixed plates 10 on the left and right sides at the bottom of the truss 6 roll smoothly along the slide rail 9 at the top of the treatment pool 1, strictly limiting the movement trajectory of the truss and ensuring that the scraper and shovel are always in contact with the bottom of the pool, thus ensuring scraping efficiency.

[0045] Once the sludge is pushed and collected in the designated area, the dual-suction pump 17 at the top of the truss 6 starts, efficiently collecting the sludge through a dual-path sludge suction system: the "figure-eight" guide block 22 on the front side of the placement plate 15 rotates with the placement plate, drawing the sludge towards the center, which is then sucked in by the inlet pipe 23 located behind the guide block and transported to the first conveying pipe 19 via the second connecting pipe 20; simultaneously, the sludge scooped up by the shovel plate 24 is carried to below the transfer pipe 25, sucked in by the transfer pipe, and also flows into the first conveying pipe 19. After the two sludge streams merge in the first conveying pipe, they enter the dual-suction pump 17 through the first connecting pipe 18, and are then transported to the discharge pipe 28 by the support plate 26 through the second conveying pipe 27 at the output end of the dual-suction pump, finally being discharged from the treatment tank 1 and entering the subsequent sludge treatment unit.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A center-driven scraper-suction sludge machine, comprising a treatment tank (1), characterized in that: The bottom of the treatment pool (1) is fixedly connected to a base frame (2), and a motor (3) is installed inside the base frame (2). A rotating rod (4) is fixedly connected to the output end of the motor (3). An outer cylinder (5) is installed inside the treatment pool (1). The top end of the rotating rod (4) is fixedly connected to the top end of the inner cylinder (5). A truss (6) is installed on the top of the treatment pool (1). A sleeve (7) is fixedly connected to the bottom of the truss (6). The top end of the outer cylinder (5) is fixedly connected to the inside of the sleeve (7). A first fixing plate (8) is fixedly connected to the outer side of the top of the treatment pool (1). A slide rail (9) is fixedly connected to the top of the first fixing plate (8).

2. The center-driven scraper-suction sludge machine according to claim 1, characterized in that: The bottom wall of the truss (6) is fixedly connected to the left and right sides of the second fixing plate (10). The bottom wall of each second fixing plate (10) is rotatably connected to two connecting frames (11). Each connecting frame (11) is rotatably connected to a pulley (12). The four pulleys (12) are slidably connected to the top of the slide rail (9).

3. The center-driven scraper-suction sludge machine according to claim 1, characterized in that: The front wall of the treatment tank (1) is fixedly connected to a control panel (13), the bottom outer side of the outer cylinder (5) is fixedly connected to a first connecting ring (14), the left and right sides of the outer side of the first connecting ring (14) are fixedly connected to a placement plate (15), and the top front and rear sides of the two placement plates (15) are fixedly connected to a support frame (16).

4. The center-driven scraper-suction sludge machine according to claim 3, characterized in that: The tops of the four support frames (16) are fixedly connected to the bottom wall of the truss (6). A double suction pump (17) is provided on the top of the truss (6). The input ends of the double suction pump (17) on the left and right sides are fixedly connected to the first connecting pipe (18). The bottom ends of the two first connecting pipes (18) penetrate the interior of the truss (6) and are connected to the first conveying pipe (19). The front inner side walls of the two placement plates (15) are fixedly connected to the inclined plate (21).

5. The center-driven scraper-suction sludge machine according to claim 4, characterized in that: The bottom ends of the two first conveying pipes (19) are connected to the second connecting pipe (20), the bottom of the two second connecting pipes (20) are fixedly connected to the top of the two first connecting rings (14), the front side of the two placement plates (15) are fixedly connected to the guide block (22), and the bottom wall of the two second connecting pipes (20) is connected to the inlet pipe (23) through the interior of the placement plate (15).

6. The center-driven scraper-suction sludge machine according to claim 5, characterized in that: Each of the aforementioned sewage inlet pipes (23) is located in the middle of the rear side of the two guide blocks (22). The rear side interior of the two placement plates (15) is fixedly connected with a shovel plate (24). The rear side walls of the two second connecting pipes (20) are connected to a connecting pipe (25). The bottom of the two connecting pipes (25) penetrates the rear side interior of the placement plate (15) and is located at the top of the shovel plate (24).

7. The center-driven scraper-suction sludge machine according to claim 4, characterized in that: A support plate (26) is fixedly connected to the right side of the front wall of the truss (6). A second conveying pipe (27) is fixedly connected to the output end of the double suction pump (17). The bottom wall of the second conveying pipe (27) is fixedly connected to the top of the support plate (26). The other end of the second conveying pipe (27) is connected to a sewage pipe (28). The sewage pipe (28) is located on the outside of the first fixed plate (8).

8. The center-driven scraper-suction sludge machine according to claim 1, characterized in that: The outer top of the outer cylinder (5) is fixedly connected to a second connecting ring (29), and the outer side of the second connecting ring (29) is fixedly connected to a connecting rod (30). The other side of the two connecting rods (30) is fixedly connected to a scraper (31), and the outer side wall of the two scrapers (31) is correspondingly set to the inner side wall of the treatment tank (1).

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