Integrated sewage treatment station high-efficiency energy-saving scraping and suction sludge device

Abstract

The application relates to the technical field of sewage treatment, in particular to an integrated sewage treatment station high-efficiency energy-saving scraping and sucking sludge device, aiming at the defects of the prior art, providing an integrated sewage treatment station high-efficiency energy-saving scraping and sucking sludge device, which comprises a vertical plate, clamping mechanisms are arranged on the two sides of the vertical plate, the clamping mechanisms each comprise a clamping plate, an extension edge is arranged at the upper end of a tank body, when the two clamping plates move inward to clamp the extension edge, the whole scraping and sucking sludge device can be fixed; an L-shaped elbow pipe is arranged at the lower end of the vertical plate, a linear scraping and sucking pipe is arranged at the lower end of the L-shaped elbow pipe, a rotatable inner shaft is further arranged on one side of the vertical plate, an angle adjusting mechanism is arranged on the outer surface of the inner shaft, when the inner shaft rotates, the linear scraping and sucking pipe can be driven to reciprocate along the inner wall of the tank body through cooperation with the angle adjusting mechanism; the clock pendulum movement mode is adopted, active scraping and collecting and synchronous air-lifting and sucking of the sludge deposited at the bottom of a pool are realized, and the sludge accumulation blind area which cannot be reached by the traditional fixed air-lifting backflow can be covered.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to an integrated wastewater treatment plant with a high-efficiency and energy-saving sludge scraping and suction device. Background Technology

[0002] Integrated wastewater treatment equipment has been widely used in small and medium-sized wastewater treatment fields due to its advantages such as compact structure, small footprint, and short construction period. Currently, integrated wastewater treatment equipment is mainly divided into two types: carbon steel rectangular structure and fiberglass tank horizontal structure. Both types of equipment generally use air-lift for sludge return and excess sludge discharge in the external return process of the secondary sedimentation tank. Specifically, sludge pipes perpendicular to the bottom of the secondary sedimentation tank are installed, and compressed air is used as the lifting power to extract the sludge settled at the bottom of the tank and return it to the front-end treatment unit. The air-lift method has the advantage of low energy consumption because it does not require a sludge return pump.

[0003] However, the aforementioned fixed airlift reflux method has revealed significant limitations in actual operation. Because the sludge return pipe can only extract sludge from a small area around the pipe opening, sludge in areas further away cannot be effectively extracted, leading to a sludge blind spot over time. As operating time increases, sludge continues to accumulate in this blind spot, reducing the effective settling space in the secondary sedimentation tank and affecting the normal process water volume. Furthermore, long-term accumulated sludge is highly susceptible to anaerobic reactions under anoxic conditions, causing sludge to float and total phosphorus to be released. In severe cases, this can trigger sludge runoff from the secondary sedimentation tank, resulting in effluent exceeding quality standards. In addition, traditional integrated equipment typically lacks a mechanical sludge scraping and suction device, making it impossible to actively scrape and clean the sludge deposited at the bottom of the tank.

[0004] Therefore, a sludge scraping and suction device is provided that can adapt to the structural characteristics of integrated sewage treatment equipment and effectively solve the problem of sludge accumulation blind spots in the secondary sedimentation tank. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an integrated, high-efficiency, energy-saving sludge scraping and suction device for wastewater treatment plants. Employing a pendulum motion mechanism, it achieves active scraping and simultaneous air-lift suction of sludge settled at the bottom of the tank. The simultaneous scraping and suction action covers sludge accumulation blind spots that traditional fixed air-lift return systems cannot reach, fundamentally preventing long-term sludge deposition at the bottom of the tank and effectively solving the problems mentioned in the background section.

[0006] The technical solution adopted by the present invention to solve the above problems is as follows: An integrated wastewater treatment plant with a high-efficiency and energy-saving sludge scraping and suction device includes a vertical plate. Clamping mechanisms are provided on both sides of the vertical plate, each clamping mechanism including two movable clamping plates. An extension edge is provided at the upper end of the tank. When the two clamping plates move inward to clamp the extension edge, the entire sludge scraping and suction device can be fixed. An L-shaped bend is provided at the lower end of the vertical plate, and a straight scraping and suction pipe is provided at the lower end of the L-shaped bend. A rotatable inner shaft is also provided on one side of the vertical plate. An angle adjustment mechanism is provided on the outer surface of the inner shaft. When the inner shaft rotates, it can drive the straight scraping and suction pipe to swing back and forth along the inner wall of the tank in cooperation with the angle adjustment mechanism.

[0007] The straight scraper tube includes a mud scraper tube, and multiple suction ports are opened at the bottom of the mud scraper tube.

[0008] The lower end of the L-shaped bend is provided with an inner tube, and the upper end of the sludge scraper is provided with an outer tube. The inner tube is slidably connected to the inner wall of the outer tube. A collar is fixed to the lower end of the outer surface of the inner tube, and a tension spring that cooperates with the collar is provided on the inner wall of the outer tube.

[0009] A top plate is fixed to one end face of the vertical plate. A first motor is provided on the upper surface of the top plate. An inner shaft is provided at the output end of the first motor. The angle adjustment mechanism includes an arc-shaped track frame, which is fixed to the lower end surface of the inner shaft. A U-shaped seat is hinged to the outer surface of the L-shaped bend. An arc-shaped slider is rotatably connected to the upper end of the U-shaped seat. An arc-shaped groove is provided on the inner wall of the arc-shaped track frame, and the arc-shaped slider is slidably connected to the inner wall of the arc-shaped groove.

[0010] Both sides of the arc-shaped track frame are hinged with L-shaped pry bars that can swing, and both sides of the arc-shaped slider are hinged with second sliding pins. One end of each L-shaped pry bar is provided with a second keyway that cooperates with the second sliding pin.

[0011] A circular wheel is slidably connected to the outer surface of the inner shaft. A first sliding pin is fixed to both sides of the outer surface of the circular wheel. A first keyway that mates with the first sliding pin is opened at the other end of the L-shaped pry bar.

[0012] The inner wall of the top plate is provided with a first threaded rod that can rotate, and a cylindrical pad that cooperates with the annular wheel is fixed to the lower end of the outer surface of the first threaded rod.

[0013] The inner wall of the vertical plate is slidably connected to an arc-shaped sleeve rod that cooperates with the annular wheel. Both sides of the lower end of the arc-shaped sleeve rod are fixed with U-shaped guide plates. When the two U-shaped guide plates move downward, they can drive the clamping plate to close inward.

[0014] An extension rod is fixed to both ends of the vertical plate. Two square sliders are slidably connected to the inner wall of each extension rod. A third sliding pin is provided at the upper end of each square slider. An inclined groove and a vertical groove that cooperate with the third sliding pin are opened on both sides of the inner wall of the U-shaped guide plate. Clamping plates are installed at the lower end of the corresponding square sliders.

[0015] Each of the square sliders has a clamp fixed to its lower end surface, and an arched seat is fixed to one side of the lower end surface of each clamp. Each clamp plate is slidably connected to the other side of the lower end surface of the clamp. Each arched seat has a second threaded rod threaded to its inner wall, and the second threaded rod is rotatably connected to the clamp plate.

[0016] Compared with the prior art, the present invention has the following advantages: In operation, the operator first hoists the vertical plate above the tank, allowing the bottom-mounted scraper pipe to naturally descend into the secondary settling tank. Then, according to the actual tank specifications, the operator rotates the first handle to drive the first threaded rod and cylindrical pad to move up and down, thereby causing the annular wheel to slide up and down along the inner shaft. The annular wheel, through the engagement of the first sliding pin and the first keyway, drives the L-shaped pry bar to rotate, which in turn, through the engagement of the second sliding pin and the second keyway, drives the arc-shaped slider to slide along the arc-shaped groove within the arc-shaped track frame. When the arc-shaped slider is collinear with the inner shaft, the swing stroke is zero; the further it deviates from the collinear position, the greater the reciprocating swing stroke of the scraper pipe. The large size allows for stepless adjustment of the swing angle within the range of 15 to 18 degrees. Simultaneously, the up-and-down movement of the annular wheel drives the third sliding pin through the arc-shaped sleeve and U-shaped guide plate, sequentially passing through the inclined and vertical grooves, causing the square slider and clamping plate to synchronously close inwards. This automatically clamps and fixes the extended edge of the tank while the stroke adjustment is complete. For fine adjustments, the second threaded rod can be rotated via the second handle, further conforming the clamping plate to the extended edges of different thicknesses, ensuring a stable installation. After fixing, the first motor drives the inner shaft to continuously rotate forward and backward. Since the arc-shaped slider has deviated from its collinear position, the arc... When the track frame rotates, the arc-shaped slider pushes the U-shaped seat to generate periodic deflection, which in turn drives the L-shaped bend to rotate back and forth, driving the scraper pipe to swing back and forth in a pendulum-like manner along the arc-shaped bottom wall of the tank within a set angle range. Multiple suction ports at the bottom of the scraper pipe create negative pressure under external air-lift suction, continuously extracting the collected sludge. Simultaneously, rollers on both sides of the scraper pipe roll along the tank wall, ensuring the scraper pipe always adheres to the arc-shaped inner wall while significantly reducing friction loss. The upper end of the scraper pipe is slidably connected to the outer pipe via an inner tube, collar, and tension spring, ensuring the scraper pipe can easily contact uneven or slightly rough surfaces at the tank bottom. The device can adapt to floating during deformation, always maintaining effective contact with the tank wall, and is suitable for tanks with different curvatures. Compared with existing technologies, this device firstly uses a pendulum-like reciprocating motion combined with air-lift suction, with sludge scraping and suction working simultaneously. This can cover sludge accumulation blind spots that traditional fixed air-lift return systems cannot reach, fundamentally eliminating the risk of long-term sludge deposition at the bottom of the tank leading to anaerobic phosphorus release and excessive total phosphorus. Secondly, because the sludge scraping pipe always scrapes back and forth along the curved bottom of the tank, the effective sedimentation space in the secondary sedimentation tank is maintained, avoiding sludge runoff accidents caused by the increase in sludge accumulation height, and ensuring that the effluent water quality meets standards in a long-term stable manner.More importantly, the motor, reducer, and transmission components of the entire device are all installed outside the tank, completely avoiding contact with sewage. This prevents corrosion and malfunctions common in underwater equipment, resulting in a long service life and easy maintenance. The device does not require water outages or manual cleaning in the sedimentation area during operation, fundamentally eliminating safety hazards associated with confined space operations. Furthermore, the angle adjustment mechanism allows for rapid adjustment of the swing stroke based on the actual tank dimensions during installation, while the clamping mechanism achieves synchronous locking during stroke adjustment, offering convenient operation and strong adaptability. Limiters and physical barriers provide dual safety protection, ensuring the pendulum's motion remains within a safe angle range and preventing any mechanical damage to the fiberglass tank. Overall, this device is compact, energy-efficient, and reliable, maintaining a highly efficient and stable sludge scraping and suction effect during long-term continuous operation of integrated sewage treatment equipment. Attached Figure Description

[0017] Figure 1 This is an isometric view of an integrated wastewater treatment plant high-efficiency and energy-saving sludge scraping and suction device according to the present invention.

[0018] Figure 2 This is a cross-sectional view of the tank of an integrated wastewater treatment plant high-efficiency and energy-saving sludge scraping and suction device according to the present invention.

[0019] Figure 3 This is a schematic diagram of the external pipe installation of an integrated wastewater treatment plant high-efficiency and energy-saving sludge scraping and suction device according to the present invention.

[0020] Figure 4 This is a cross-sectional view of the sludge scraping pipe of an integrated wastewater treatment plant high-efficiency and energy-saving sludge scraping and suction device according to the present invention.

[0021] Figure 5 This is a schematic diagram of the installation of the annular wheel of an integrated wastewater treatment plant high-efficiency and energy-saving sludge scraping and suction device according to the present invention.

[0022] Figure 6 This is a schematic diagram of the installation of the first threaded rod of an integrated wastewater treatment plant high-efficiency and energy-saving sludge scraping and suction device according to the present invention.

[0023] Figure 7 This is a schematic diagram of the vertical plate installation of an integrated wastewater treatment plant high-efficiency and energy-saving sludge scraping and suction device according to the present invention.

[0024] Figure 8 This is a schematic diagram of the installation of the U-shaped guide plate of the integrated sewage treatment plant high-efficiency and energy-saving sludge scraping and suction device according to the present invention.

[0025] Figure 9 This is a cross-sectional view of the U-shaped guide plate of an integrated wastewater treatment plant high-efficiency and energy-saving sludge scraping and suction device according to the present invention.

[0026] Figure 10This is a schematic diagram of the clamping plate installation of an integrated wastewater treatment plant high-efficiency and energy-saving sludge scraping and suction device according to the present invention.

[0027] Numbering in the diagram: 1-Tank body, 2-Extension edge, 3-Vertical plate, 4-L-shaped bend, 5-Inner tube, 6-Outer tube, 7-Tension spring, 8-Sludge scraper pipe, 9-Suction port, 10-Roller, 11-Top plate, 12-First motor, 13-Inner shaft, 14-Circular wheel, 15-Arc-shaped track frame, 16-L-shaped pry bar, 17-First sliding pin, 18-First keyway, 19-Second sliding pin, 20-Second keyway, 21-U 22-Arch-shaped seat, 23-Arch-shaped slide, 24-First handle, 25-First threaded rod, 26-Cylindrical pad, 27-Arch-shaped sleeve rod, 28-Long guide rod, 29-Extension rod, 30-U-shaped guide plate, 31-Vertical groove, 32-Inclined groove, 33-Third sliding pin, 34-Square slider, 35-Clamping seat, 36-Arch-shaped seat, 37-Second threaded rod, 38-Second handle, 39-Clamping plate, 40-Ring. Detailed Implementation

[0028] The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] like Figures 1-10 As shown, the present invention provides an integrated wastewater treatment plant high-efficiency and energy-saving sludge scraping and suction device, including a vertical plate 3. The vertical plate 3 is provided with clamping mechanisms on both sides. Each clamping mechanism includes two movable clamping plates 39. The upper end of the tank body 1 is provided with an extension edge 2. When the two clamping plates 39 move inward to clamp the extension edge 2, the entire sludge scraping and suction device can be fixed. The lower end of the vertical plate 3 is provided with an L-shaped bend 4. The lower end of the L-shaped bend 4 is provided with a straight scraping and suction pipe. The vertical plate 3 is also provided with a rotatable inner shaft 13 on one side. The outer surface of the inner shaft 13 is provided with an angle adjustment mechanism. When the inner shaft 13 rotates, it can drive the straight scraping and suction pipe to swing back and forth along the inner wall of the tank body 1 in cooperation with the angle adjustment mechanism.

[0030] like Figures 1-8As shown, tank 1 and extension edge 2 are existing technologies and will not be described in detail. Vertical plate 3 supports the entire sludge scraping and suction device. Through a clamping mechanism, specifically two clamping plates 39 that can move inwards or outwards, when the clamping plates 39 move inwards and clamp onto extension edge 2, the entire sludge scraping and suction device is fixed to the upper end of tank 1, thus ensuring stable operation of the straight-line scraper. L-shaped bend 4 is rotatably connected to the lower end of vertical plate 3. Even if L-shaped bend 4 can rotate back and forth, it can also drive the straight-line scraper to swing back and forth. Through the cooperation of the inner shaft 13 and the angle adjustment mechanism, when the inner shaft 13 rotates, it can drive the straight-line scraper to swing back and forth along the inner wall of tank 1, thereby cleaning and adsorbing the sludge inside tank 1. Furthermore, the angle adjustment mechanism can adjust the stroke of the straight-line scraper, which can be adjusted according to the tank 1 and actual usage. Adaptive adjustments are made; a pendulum motion mechanism is adopted, with a small motor and a low-speed micro reducer driving the bottom-mounted scraper pipe to swing back and forth at the bottom of the arc-shaped tank of the secondary sedimentation tank, achieving active scraping and simultaneous air-lift suction of the sludge settled at the bottom of the tank. The simultaneous scraping and suction can cover the sludge accumulation blind spots that traditional fixed air-lift return systems cannot reach, fundamentally avoiding long-term sludge deposition at the bottom of the tank. Because the sludge at the bottom of the tank is scraped and extracted in time, a long-term accumulation of anaerobic sludge layer will not form in the secondary sedimentation tank, effectively avoiding the occurrence of anaerobic phosphorus release and eliminating the risk of effluent exceeding standards due to anaerobic sludge floating and total phosphorus release. At the same time, the effective sedimentation space of the secondary sedimentation tank is maintained, avoiding sludge spillage accidents induced by the sludge accumulation height affecting the normal process water volume. Traditional integrated equipment requires water shutdown and emptying and manual cleaning in the sedimentation zone when sludge deposition is severe, which not only affects the continuous operation of the sewage treatment system, but also poses safety hazards for confined space operations. This application enables online sludge scraping and suction operations without interrupting water flow, eliminating the need for personnel to enter the tank and fundamentally removing the safety risks associated with confined space operations, thus ensuring the personal safety of operators. The drive motor and reducer, among other power actuators, are all fixedly installed on the outside of the tank 1 above the secondary sedimentation tank, preventing contact with the water and avoiding corrosion and malfunctions of underwater equipment. The device is equipped with limit switches for automatic reversal, supplemented by physical blocking protection as a final safeguard, ensuring that the pendulum motion does not exceed the design angle and preventing damage to the fiberglass tank 1. The overall structure is simple and can operate safely and stably for a long period of time.

[0031] The straight scraper tube includes a mud scraper tube 8, and the bottom of the mud scraper tube 8 is provided with multiple suction ports 9.

[0032] like Figures 3-4As shown, the inside of the sludge scraper pipe 8 is hollow. When the L-shaped bend pipe 4 is sucked, a negative pressure is formed inside the sludge scraper pipe 8, and the sludge inside the tank 1 can be adsorbed to the outside through the adsorption port 9. Rollers 10 are rotatably connected to both sides of the sludge scraper pipe 8. The rollers 10 can reduce the friction between the sludge scraper pipe 8 and the side wall of the tank 1 when it swings, thus protecting the sludge scraper pipe 8.

[0033] The lower end of the L-shaped bend 4 is provided with an inner tube 5, and the upper end of the sludge scraper 8 is provided with an outer tube 6. The inner tube 5 is slidably connected to the inner wall of the outer tube 6. A collar 40 is fixedly connected to the lower end of the outer surface of the inner tube 5, and a tension spring 7 that cooperates with the collar 40 is provided on the inner wall of the outer tube 6.

[0034] like Figure 4 As shown, the inner tube 5 and the collar 40 can slide up and down on the inner wall of the outer tube 6. One end of the tension spring 7 is fixed to the collar 40, and the other end of the tension spring 7 is fixed to the inner wall of the outer tube 6. The tension spring 7 always has a downward pulling force on the outer tube 6. Even if the sludge scraper pipe 8 has a downward driving force under normal conditions, the sludge scraper pipe 8 can contact the inner wall of the tank 1 under normal conditions. That is, when the sludge scraper pipe 8 swings, it can scrape along the inner wall of the tank 1, which can adapt to various models of tank 1.

[0035] A top plate 11 is fixedly connected to one end face of the vertical plate 3. A first motor 12 is provided on the upper surface of the top plate 11. An inner shaft 13 is provided at the output end of the first motor 12. The angle adjustment mechanism includes an arc-shaped track frame 15, which is fixedly connected to the lower end surface of the inner shaft 13. A U-shaped seat 21 is hinged to the outer surface of the L-shaped bend 4. An arc-shaped slider 22 is rotatably connected to the upper end of the U-shaped seat 21. An arc-shaped groove 23 is provided on the inner wall of the arc-shaped track frame 15. The arc-shaped slider 22 is slidably connected to the inner wall of the arc-shaped groove 23.

[0036] like Figure 5As shown, the function of the first motor 12 is to provide rotational power for the inner shaft 13. The motor is existing technology and will not be described further. The inner shaft 13 is rotatably connected to the inner wall of the top plate 11, limiting its rotation. The U-shaped seat 21 is hinged to the outer surface of the L-shaped bend 4, allowing it to swing back and forth on the L-shaped bend 4. The L-shaped bend 4 is rotatably connected to the inner wall of the vertical plate 3. When the U-shaped seat 21 swings left and right, it drives the L-shaped bend 4 to rotate reciprocally, thus driving the scraper pipe 8 to swing. The arc-shaped slider 22 can slide along the inner wall of the arc-shaped groove 23. When the arc-shaped slider 22 and the inner shaft 13 are in a collinear position, the inner shaft... The rotation of the inner shaft 13 can drive the arc-shaped track frame 15 and the arc-shaped slider 22 to move in a circular motion. That is, the arc-shaped slider 22 can rotate on the upper end of the U-shaped seat 21 without causing the U-shaped seat 21 to deflect. When the arc-shaped slider 22 slides along the inner wall of the arc-shaped groove 23 to the designated position, the arc-shaped slider 22 is no longer collinear with the inner shaft 13. When the inner shaft 13 rotates, it can drive the arc-shaped slider 22 and the U-shaped seat 21 to deflect in a circular motion, that is, drive the L-shaped bend 4 to rotate back and forth, thereby driving the scraper pipe 8 to swing back and forth. Furthermore, by driving the arc-shaped slider 22 to move, the stroke of the scraper pipe 8 can be changed.

[0037] Both sides of the arc-shaped track frame 15 are hinged with L-shaped pry bars 16 that can swing, and both sides of the arc-shaped slider 22 are hinged with second sliding pins 19. One end of each L-shaped pry bar 16 is provided with a second keyway 20 that cooperates with the second sliding pin 19.

[0038] like Figures 5-6 As shown, the L-shaped pry bar 16 is hinged to the arc-shaped track frame 15. When the L-shaped pry bar 16 is flipped, the second sliding pin 19 and the second keyway 20 engage to drive the arc-shaped slider 22 to slide along the inner wall of the arc-shaped slide groove 23, thereby changing the position of the arc-shaped slider 22 and thus changing the reciprocating stroke of the scraper pipe 8.

[0039] A ring wheel 14 is slidably connected to the outer surface of the inner shaft 13. A first sliding pin 17 is fixed to both sides of the outer surface of the ring wheel 14. A first keyway 18 that cooperates with the first sliding pin 17 is opened at the other end of the L-shaped pry bar 16.

[0040] like Figure 5 As shown, the annular wheel 14 and the inner shaft 13 are connected by a spline. The annular wheel 14 can slide up and down on the outer surface of the inner shaft 13. When the inner shaft 13 rotates, it can drive the annular wheel 14 to rotate synchronously. When the annular wheel 14 moves up and down, it can drive the first sliding pin 17 to move up and down. Under the engagement of the first sliding pin 17 and the first keyway 18, it can drive the L-shaped pry bar 16 to flip up and down, that is, drive the arc-shaped slider 22 to move, thereby changing the stroke of the scraper tube 8.

[0041] The inner wall of the top plate 11 is provided with a first threaded rod 25 that can rotate, and a cylindrical pad 26 that cooperates with the annular wheel 14 is fixedly connected to the lower end of the outer surface of the first threaded rod 25.

[0042] like Figure 6 As shown, a first handle 24 is fixedly connected to the upper surface of the first threaded rod 25. The function of the first handle 24 is to facilitate the rotation of the first threaded rod 25. When the first threaded rod 25 rotates, it can drive the first threaded rod 25 and the annular pad to move up or down through the threaded connection with the top plate 11. When the annular pad moves up or down, it can drive the annular wheel 14 to move up and down. Through the cooperation between the annular wheel 14 and the annular pad, when the annular pad moves up and down, it can drive the annular wheel 14 to move up and down, and the annular wheel 14 can also rotate. The two do not affect each other.

[0043] The inner wall of the vertical plate 3 is slidably connected to an arc-shaped sleeve 27 that cooperates with the annular wheel 14. Both sides of the lower end of the arc-shaped sleeve 27 are fixed with U-shaped guide plates 30. When the two U-shaped guide plates 30 move downward, they can drive the clamping plate 39 to close inward.

[0044] like Figures 6-9 As shown, the arc-shaped sleeve 27 and the long guide rod 28 can slide up and down on the inner wall of the vertical plate 3. With the cooperation of the arc-shaped sleeve 27 and the annular wheel 14, when the annular wheel 14 moves up and down, it can drive the arc-shaped sleeve 27 to move up and down, and then drive the U-shaped guide plate 30 to move up and down. When the U-shaped guide plate 30 moves up and down, it can drive the two clamping plates 39 to move inward or outward. When moving inward, it can clamp and fix the device to the upper end of the tank 1. That is, when the reciprocating stroke of the scraper pipe 8 is adjusted according to the model of the tank 1, the clamping plates 39 can move inward synchronously to clamp and fix the extension edge 2.

[0045] An extension rod 29 is fixedly connected to both ends of the vertical plate 3. Two square sliders 34 are slidably connected to the inner wall of the extension rod 29. A third sliding pin 33 is provided at the upper end of each square slider 34. An inclined groove 32 and a vertical groove 31 that cooperate with the third sliding pin 33 are opened on both sides of the inner wall of the U-shaped guide plate 30. The clamping plate 39 is installed at the lower end of the corresponding square slider 34.

[0046] like Figures 7-9As shown, the square slider 34 can slide left and right on the inner wall of the extension rod 29. The third sliding pins 33 are all fixed to the inner wall of the upper end of the corresponding square slider 34. Through the inclined groove 32 and the vertical groove 31, when the long guide rod 28, U-shaped guide plate 30 and the like move downward, the two third sliding pins 33, square sliders 34, clamping plates 39 and the like can be driven to move inward synchronously under the meshing of the inclined groove 32 and the third sliding pins 33. When the U-shaped guide plate 30 continues to move downward to make the third sliding pins 33 enter the inner wall of the vertical groove 31, the third sliding pins 33, square sliders 34, clamping plates 39 and the like no longer move inward. That is, the clamping plates 39 are in the innermost closed state, that is, the extension edge 2 is clamped and fixed.

[0047] Each of the square sliders 34 has a clamp 35 fixedly connected to its lower end surface. Each of the clamps 35 has an arched seat 36 fixedly connected to one side of its lower end surface. Each of the clamps 39 is slidably connected to the other side of the lower end surface of the clamp 35. Each of the arched seats 36 has a second threaded rod 37 threadedly connected to its inner wall. Each of the second threaded rods 37 is rotatably connected to the clamp 39.

[0048] like Figures 9-10 As shown, the clamping plate 39 can slide left and right on the lower surface of the clamping seat 35. The outer ends of the second threaded rod 37 are all fixed with second handles 38. When the second handles 38 are driven to rotate, the second threaded rod 37 can be driven to rotate. When the second threaded rod 37 rotates, through the threaded connection with the arched seat 36, the clamping plate 39 can be driven to move inward or outward, that is, to adjust the initial position of the clamping plate 39. The position of the clamping plate 39 is adjusted according to the rear end of the extension edge 2 so that when the U-shaped guide plate 30 moves downward, the clamping plate 39 can clamp and fix the extension edge 2. Through the threaded connection between the second threaded rod 37 and the threaded seat, it has a self-locking function, that is, when the second threaded rod 37 does not rotate, the initial position of the clamping plate 39 is fixed.

[0049] In use, the operator first hoists the vertical plate 3 above the tank 1, allowing the bottom straight suction pipe to naturally descend into the secondary sedimentation tank. Then, according to the actual specifications of the tank 1, the operator rotates the first handle 24 to drive the first threaded rod 25 and the cylindrical pad 26 to move up and down, thereby causing the annular wheel 14 to slide up and down along the inner shaft 13. The annular wheel 14, through the cooperation of the first sliding pin 17 and the first keyway 18, drives the L-shaped pry bar 16 to rotate, and then, through the cooperation of the second sliding pin 19 and the second keyway 20, drives the arc-shaped slider 22 to slide along the arc-shaped groove 23 within the arc-shaped track frame 15. When the arc-shaped slider 22 is collinear with the inner shaft 13, the swing stroke is zero, deviating from the collinear position. The farther the distance, the greater the reciprocating stroke of the scraper pipe 8, thus achieving stepless adjustment of the swing angle within the range of 15 to 18 degrees. Simultaneously, the up-and-down movement of the annular wheel 14 is driven by the arc-shaped sleeve rod 27 and the U-shaped guide plate 30 to drive the third sliding pin 33 through the inclined groove 32 and the vertical groove 31, causing the square slider 34 and the clamping plate 39 to simultaneously close inwards. This automatically clamps and fixes the extended edge 2 of the tank body 1 while the stroke adjustment is complete. For fine adjustments, the second threaded rod 37 can be rotated via the second handle 38, causing the clamping plate 39 to further conform to the extended edge 2 of different thicknesses, ensuring a stable installation. After fixing, the first motor 12 is started to drive the inner shaft 13 continuously. As the arc-shaped slider 22 deviates from its collinear position during forward and reverse rotation, the arc-shaped track frame 15, through the arc-shaped slider 22, pushes the U-shaped seat 21 to generate periodic deflection, thereby driving the L-shaped bend 4 to rotate back and forth. This drives the scraper pipe 8 to swing back and forth along the arc-shaped bottom wall inside the tank 1 in a pendulum-like manner within a set angle range. The multiple adsorption ports 9 at the bottom of the scraper pipe 8 form a negative pressure under the action of external air lifting suction, continuously extracting the collected sedimented sludge. At the same time, the rollers 10 on both sides of the scraper pipe 8 roll along the tank wall, ensuring that the scraper pipe 8 always fits against the arc-shaped inner wall and greatly reducing friction loss. The upper end of the scraper pipe 8 is slidably connected to the outer pipe 6 through the inner pipe 5, the collar 40, and the tension spring 7. The structure of the scraper pipe 8 allows it to float adaptively when encountering unevenness or slight deformation at the bottom of the tank, always maintaining effective contact with the tank wall, making it suitable for tanks 1 with different curvatures. Compared with existing technologies, this device firstly uses a pendulum-like reciprocating motion combined with air-lift suction, with scraping and suction working simultaneously. This can cover sludge accumulation blind spots that traditional fixed air-lift return systems cannot reach, fundamentally eliminating the risk of long-term sludge deposition at the bottom of the tank leading to anaerobic phosphorus release and excessive total phosphorus. Secondly, because the scraper pipe 8 constantly scrapes along the curved bottom of the tank, the effective sedimentation space in the secondary sedimentation tank is maintained, avoiding sludge runoff accidents caused by the increase in sludge accumulation height, and ensuring that the effluent water quality meets standards in a long-term stable manner.More importantly, the motor, reducer, and transmission components of the entire device are all installed outside the tank 1, completely avoiding contact with sewage. This avoids the corrosion and malfunction problems common to underwater equipment, resulting in a long service life and easy maintenance. During operation, the device does not require water outages or manual cleaning in the sedimentation area, fundamentally eliminating safety hazards associated with confined space operations. Furthermore, the angle adjustment mechanism allows for rapid adjustment of the swing stroke according to the actual dimensions of the tank 1 during installation, while the clamping mechanism achieves synchronous locking during stroke adjustment, making operation convenient and highly adaptable. The limit switch and physical blocking protection provide dual safety assurance, ensuring the pendulum motion remains within a safe angle range and preventing any mechanical damage to the fiberglass tank 1. Overall, this device is compact, energy-efficient, and reliable, maintaining a highly efficient and stable sludge scraping and suction effect during long-term continuous operation of the integrated sewage treatment equipment.

Claims

1. A high-efficiency and energy-saving sludge scraping and suction device for an integrated sewage treatment plant, comprising a vertical plate (3), characterized in that: The vertical plate (3) is provided with clamping mechanisms on both sides. Each clamping mechanism includes two movable clamping plates (39). The upper end of the tank (1) is provided with an extension edge (2). When the two clamping plates (39) move inward to clamp the extension edge (2), the entire sludge scraping device can be fixed. The lower end of the vertical plate (3) is provided with an L-shaped bend (4). The lower end of the L-shaped bend (4) is provided with a straight scraping pipe. The vertical plate (3) is also provided with a rotatable inner shaft (13) on one side. An angle adjustment mechanism is provided on the outer surface of the inner shaft (13). When the inner shaft (13) rotates, it can drive the straight scraping pipe to swing back and forth along the inner wall of the tank (1) in cooperation with the angle adjustment mechanism.

2. The integrated wastewater treatment plant high-efficiency energy-saving sludge scraping and suction device as described in claim 1, characterized in that: The straight scraper tube includes a mud scraper tube (8), and the bottom of the mud scraper tube (8) is provided with multiple suction ports (9).

3. The integrated wastewater treatment plant high-efficiency energy-saving sludge scraping and suction device as described in claim 2, characterized in that: The lower end of the L-shaped bend (4) is provided with an inner tube (5), the upper end of the sludge scraper (8) is provided with an outer tube (6), the inner tube (5) is slidably connected to the inner wall of the outer tube (6), the lower end of the outer surface of the inner tube (5) is fixed with a collar (40), and the inner wall of the outer tube (6) is provided with a tension spring (7) that cooperates with the collar (40).

4. The integrated wastewater treatment plant high-efficiency energy-saving sludge scraping and suction device as described in claim 1, characterized in that: A top plate (11) is fixedly connected to one side end face of the vertical plate (3). A first motor (12) is provided on the upper surface of the top plate (11). An inner shaft (13) is provided at the output end of the first motor (12). The angle adjustment mechanism includes an arc-shaped track frame (15). The arc-shaped track frame (15) is fixedly connected to the lower surface of the inner shaft (13). A U-shaped seat (21) is hinged to the outer surface of the L-shaped bend (4). An arc-shaped slider (22) is rotatably connected to the upper end of the U-shaped seat (21). An arc-shaped groove (23) is opened on the inner wall of the arc-shaped track frame (15). The arc-shaped slider (22) is slidably connected to the inner wall of the arc-shaped groove (23).

5. The integrated wastewater treatment plant high-efficiency energy-saving sludge scraping and suction device as described in claim 4, characterized in that: Both sides of the arc-shaped track frame (15) are hinged with L-shaped pry bars (16) that can swing, and both sides of the arc-shaped slider (22) are hinged with second sliding pins (19). One end of the L-shaped pry bar (16) is provided with a second keyway (20) that cooperates with the second sliding pin (19).

6. The integrated wastewater treatment plant high-efficiency energy-saving sludge scraping and suction device as described in claim 5, characterized in that: A ring wheel (14) is slidably connected to the outer surface of the inner shaft (13). A first sliding pin (17) is fixed to both sides of the outer surface of the ring wheel (14). A first keyway (18) that cooperates with the first sliding pin (17) is opened at the other end of the L-shaped pry bar (16).

7. The integrated wastewater treatment plant high-efficiency energy-saving sludge scraping and suction device as described in claim 6, characterized in that: The inner wall of the top plate (11) is provided with a first threaded rod (25) that can rotate, and a cylindrical pad (26) that cooperates with the annular wheel (14) is fixed to the lower end of the outer surface of the first threaded rod (25).

8. The integrated wastewater treatment plant high-efficiency energy-saving sludge scraping and suction device as described in claim 6, characterized in that: The inner wall of the vertical plate (3) is slidably connected to an arc-shaped sleeve (27) that cooperates with the ring wheel (14). Both sides of the lower end of the arc-shaped sleeve (27) are fixed with U-shaped guide plates (30). When the two U-shaped guide plates (30) move downward, they can drive the clamping plate (39) to close inward.

9. The integrated wastewater treatment plant high-efficiency energy-saving sludge scraping and suction device as described in claim 8, characterized in that: The vertical plate (3) is fixedly connected to both ends of the vertical plate (3). The inner walls of the extension rods (29) are slidably connected to two square sliders (34). The upper end of the square sliders (34) is provided with a third sliding pin (33). The inner walls of both sides of the U-shaped guide plate (30) are provided with inclined grooves (32) and vertical grooves (31) that cooperate with the third sliding pins (33). The clamping plates (39) are installed at the lower end of the corresponding square sliders (34).

10. The integrated wastewater treatment plant high-efficiency energy-saving sludge scraping and suction device as described in claim 9, characterized in that: The lower surface of the square slider (34) is fixedly connected to a clamp (35), and an arched seat (36) is fixedly connected to one side of the lower surface of the clamp (35). The clamping plate (39) is slidably connected to the other side of the lower surface of the clamp (35). The inner wall of the arched seat (36) is threadedly connected to a second threaded rod (37), and the second threaded rod (37) is rotatably connected to the clamping plate (39).

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