A sludge scraping device for sedimentation tanks

Abstract

This utility model is specifically a sludge scraping device for sedimentation tanks, relating to the field of sedimentation tank cleaning technology. It includes a sedimentation tank body and a sludge scraping mechanism. The scraping mechanism includes a drive component, a drive shaft, and a scraper plate. The drive component, including a scraping motor, is mounted on the upper end of the sedimentation tank body. The lower output shaft of the scraping motor is fixedly connected to the drive shaft. A scraper plate is connected to the outer wall of the drive shaft via a limiting component. The scraping mechanism also includes a collection component for collecting sludge. This utility model achieves comprehensive scraping of the sedimentation tank's side and bottom walls by using a first scraping blade formed on the side and front of the scraper plate to closely contact the tank wall, and a second scraping blade integrally formed at the bottom to adhere to the tank bottom. The drive component drives the drive shaft to rotate, effectively solving the problem of scraping dead angles in existing devices.

Description

Technical Field

[0001] This utility model relates to the field of sedimentation tank cleaning technology, specifically to a sludge scraping device for sedimentation tanks. Background Technology

[0002] Sedimentation tanks are structures that remove suspended solids from water using sedimentation. They are water purification devices that utilize the natural sedimentation or coagulation sedimentation of water to remove suspended solids. Sedimentation tanks are classified into horizontal sedimentation tanks and vertical sedimentation tanks according to the direction of water flow. The sedimentation effect depends on the water flow rate and the residence time of the water in the sedimentation tank. In order to improve the sedimentation effect and reduce the land area required, honeycomb inclined tube countercurrent sedimentation tanks, accelerated clarification tanks, pulse clarification tanks, etc. are often used. Sedimentation tanks are widely used in wastewater treatment.

[0003] However, existing sedimentation tanks may still have blind spots in scraping sludge from the bottom and side walls. For example, a sludge scraping device for a horizontal flow sedimentation tank in water treatment, disclosed in CN223055159U, uses scrapers and scraper plates to scrape sludge from the bottom and side walls respectively, while combining with... Figure 3 With appendix Figure 4 It can be seen that there are still some blind spots in the scraping process, and the sludge that cannot be scraped off can easily affect the treatment effect of wastewater over time. Utility Model Content

[0004] The purpose of this utility model is to provide a sludge scraping device for sedimentation tanks, to solve the problem mentioned in the background art that existing sedimentation tanks may still have dead corners that cannot be scraped when scraping sludge on the bottom and side walls. For example, a sludge scraping device for a horizontal flow sedimentation tank in water treatment, disclosed in CN223055159U, uses a scraper and a scraper plate to scrape the sludge on the bottom and side walls respectively, and combines it with an attached... Figure 3 With appendix Figure 4 It can be seen that there are still some dead corners in the scraping process, and the sludge that cannot be scraped off can easily affect the treatment effect of wastewater over time. This solution solves the problem of dead corners in the existing device by using the first scraper blade formed by the side and front end of the scraper blade to make close contact with the tank wall, and the second scraper blade formed integrally at the bottom end to fit the bottom of the tank. The drive component drives the active shaft to rotate, so as to achieve all-round scraping of the side and bottom walls of the sedimentation tank, effectively solving the problem of dead corners in the scraping process of the existing device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sludge scraping device for a sedimentation tank, comprising a sedimentation tank body and a sludge scraping mechanism, wherein the sludge scraping mechanism includes a driving component, a drive shaft and a scraper plate, the driving component is installed at the upper end of the sedimentation tank body, the driving component includes a scraping motor, the lower output shaft of the scraping motor is fixedly connected to the drive shaft, and the scraper plate is connected to the outer wall of the drive shaft by a limiting component, and the sludge scraping mechanism further includes a collection component for collecting sludge.

[0006] In a preferred embodiment: the scraper blade is arc-shaped, and an opening is provided on the wall of the scraper blade, on which a filter screen is installed.

[0007] In a preferred embodiment: a first scraping edge is formed between the side of the scraper and the corner of the front wall, the included angle of the first scraping edge is less than 30 degrees, and the first scraping edge is in contact with the inner wall of the sedimentation tank body.

[0008] In a preferred embodiment, the bottom end of the scraper is integrally formed with a second scraping blade.

[0009] In a preferred embodiment: the limiting component includes a mounting plate, fastening bolts and a first limiting plate. The mounting plate is welded to the upper wall of the drive shaft. The end of the mounting plate near the scraper blade matches and fits against the end face of the scraper blade. The mounting plate and the scraper blade are both threadedly connected with fastening bolts. The first limiting plate is integrally formed at the bottom end of the drive shaft.

[0010] In a preferred embodiment: a handle is fixedly connected to the end of the fastening bolt away from the scraper blade, and a limiting groove matching the shape of the first limiting plate is provided on the bottom wall of the scraper blade near the drive shaft, and the first limiting plate is movably disposed in the limiting groove.

[0011] In a preferred embodiment: the bottom shape of the first limiting plate matches the second scraper, and the drive shaft wall is also integrally formed with a second limiting plate that cooperates with the mounting plate.

[0012] In a preferred embodiment: the driving component further includes a support plate, a housing, sprockets and a chain. The support plate is fixedly connected to the upper wall of the sedimentation tank body. The housing is mounted on the support plate. The scraping motor is installed inside the housing. Sprockets are fixedly connected to the outer walls of both the drive shaft and the output shaft of the scraping motor. The two sprockets are connected by chain drive. The upper end of the drive shaft is rotatably connected to the support plate.

[0013] In a preferred embodiment: the collection component includes a sludge discharge port, a first collection pipe and a second collection pipe. Two symmetrically distributed sludge discharge ports are provided on the bottom wall of the sedimentation tank body. The sludge discharge ports are funnel-shaped. The lower ends of the two sludge discharge ports are equipped with first collection pipes, which are symmetrically distributed. The two first collection pipes are fixed and connected to the second collection pipe.

[0014] In a preferred embodiment: sludge pumps are provided on the outer walls of both first collection pipes, a drain pipe is provided on the side wall of the sedimentation tank body, a water pump is provided on the drain pipe, and the sludge pump, the water pump and the scraper motor are all electrically connected to an external power source via cables.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This device achieves comprehensive scraping of the side and bottom walls of the sedimentation tank by using a first scraper blade formed by the side and front of the scraper blade to make close contact with the tank wall, and a second scraper blade integrally formed at the bottom to fit against the tank bottom. The drive component drives the active shaft to rotate, effectively solving the problem of scraping dead angles in existing devices. The limiting assembly composed of a mounting plate, fastening bolts, a first limiting plate, and a second limiting plate ensures a stable connection between the scraper blade and the active shaft. The detachable structure facilitates the maintenance and replacement of the scraper blade. The funnel-shaped discharge port, together with the symmetrically distributed first collection pipe and sludge pump, can quickly collect and discharge the scraped sludge. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the sedimentation tank of this utility model; Figure 2 This is a schematic diagram of the interior of the sedimentation tank body of this utility model; Figure 3 This is a schematic diagram of the lower end of the sedimentation tank body in this utility model; Figure 4 This is a schematic diagram of the first and second scraping blades in this utility model; Figure 5 This is a schematic diagram of the first limiting plate and the limiting groove in this utility model.

[0017] In the diagram: 1. Sedimentation tank body; 2. Drive shaft; 3. Sludge scraper; 4. Sludge scraper motor; 5. Filter screen; 6. First scraper blade; 7. Second scraper blade; 8. Mounting plate; 9. Fastening bolt; 10. First limiting plate; 11. Limiting groove; 12. Second limiting plate; 13. Support plate; 14. Chassis; 15. Chain; 16. Sludge discharge port; 17. First collection pipe; 18. Second collection pipe; 19. Sludge pump; 20. Drainage pipe. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1 and Figure 2 One embodiment provided by this utility model: A sludge scraping device for a sedimentation tank includes a sedimentation tank body 1 and a sludge scraping mechanism. The sludge scraping mechanism includes a driving component, a drive shaft 2 and a scraper 3. The driving component is installed at the upper end of the sedimentation tank body 1. The driving component includes a scraping motor 4. The lower output shaft of the scraping motor 4 is fixedly connected to the drive shaft 2. The scraper 3 is connected to the outer wall of the drive shaft 2 through a limiting component. The sludge scraping mechanism also includes a collection component for collecting sludge.

[0020] Please see Figure 2 and Figure 4 In this embodiment, the scraper 3 is arc-shaped and adapted to the circular inner wall of the sedimentation tank, ensuring that the scraper 3 fits tightly against the tank wall. An opening is provided on the wall of the scraper 3, and a filter screen 5 is installed on the opening wall. The filter screen 5 is made of stainless steel and has a mesh size of 0.5-1mm. The filter screen 5 allows some water to pass through, reducing agitation and water resistance. When the scraper 3 rotates, it pushes the scraped sludge to the top of the discharge port 16, where the sludge falls into the discharge port 16 under its own gravity and is subsequently collected.

[0021] Please see Figure 1 and Figure 2 In this embodiment, a first scraping blade 6 is formed between the side edge of the scraper 3 and the corner of the front wall. The included angle of the first scraping blade 6 is less than 30 degrees. The first scraping blade 6 is in contact with the inner wall of the sedimentation tank body 1. A second scraping blade 7 is integrally formed at the bottom end of the scraper 3. The arrangement of the first scraping blade 6 and the second scraping blade 7 ensures that there are no dead corners for scraping the side wall and bottom wall, and can efficiently scrape the sludge deposited on the bottom and wall of the tank.

[0022] Please see Figure 4 and Figure 5In this embodiment, the limiting component includes a mounting plate 8, fastening bolts 9, and a first limiting plate 10. The mounting plate 8 is welded to the upper wall of the drive shaft 2. The end of the mounting plate 8 near the scraper 3 matches the end face of the scraper 3 and is in contact with the end face of the scraper 3. Both the mounting plate 8 and the scraper 3 are threadedly connected with fastening bolts 9. The fastening bolts 9 enable the two to be detachably fixed, which facilitates the maintenance and replacement of the scraper 3 and the filter screen 5. The bottom end of the drive shaft 2 is integrally formed with a first limiting plate 10, which can limit the bottom of the scraper 3 and prevent the scraper 3 from shifting during operation.

[0023] Please see Figure 4 and Figure 5 In this embodiment, a handle is fixedly connected to the end of the fastening bolt 9 away from the scraper blade 3. A limiting groove 11 matching the shape of the first limiting plate 10 is provided on the bottom wall of the scraper blade 3 near the drive shaft 2. The first limiting plate 10 is movably disposed within the limiting groove 11. When installing the scraper blade 3, first pass the lower end of the scraper blade 3 between the mounting plate 8 and the second limiting plate 12, then lower the scraper blade 3 along the mounting plate 8 and the second limiting plate 12 until the first limiting plate 10 is inserted into the limiting groove 11, thus completing the installation of the scraper blade 3. The first limiting plate 10 is movably connected in the limiting groove 11, which not only achieves the limiting function, but also facilitates the installation and disassembly of the scraper 3. The bottom shape of the first limiting plate 10 matches the second scraper 7, so as to avoid the limiting plate affecting the scraping operation of the second scraper 7 on the bottom of the pool. The active shaft 2 is also integrally formed with a second limiting plate 12 that cooperates with the mounting plate 8. The second limiting plate 12 and the mounting plate 8 work together to fix the scraper 3 from both the top and bottom, further improving the working stability of the scraper 3.

[0024] Please see Figure 2 and Figure 4 In this embodiment, the driving component also includes a support plate 13, a housing 14, sprockets, and a chain 15. The support plate 13 is fixedly connected to the upper wall of the sedimentation tank body 1. The support plate 13 is made of stainless steel. The housing 14 is installed on the support plate 13. The scraping motor 4 is installed inside the housing 14. The housing 14 protects the internal motor and transmission components, preventing water and sludge from corroding the components. Sprockets are fixedly connected to the outer walls of the drive shaft 2 and the output shaft of the scraping motor 4. The two sprockets are connected by a chain 15. The upper end of the drive shaft 2 is rotatably connected to the support plate 13. When the scraping motor 4 is started, it drives one of the sprockets to rotate. Then, through the chain 15 and the other sprocket, it drives the drive shaft 2 to rotate synchronously. The lower diameter of the drive shaft 2 is larger than the upper diameter. When the mounting plate 8 drives the scraper 3 to a position where there is no support plate 13 above, the scraper 3 can be disassembled.

[0025] Please see Figure 1and Figure 3 In this embodiment, the collection component includes a sludge discharge port 16, a first collection pipe 17, and a second collection pipe 18. Two symmetrically distributed sludge discharge ports 16 are opened on the bottom wall of the sedimentation tank body 1. The sludge discharge ports 16 are funnel-shaped, and the funnel structure facilitates the collection of sludge and improves the sludge discharge efficiency. The lower ends of the two sludge discharge ports 16 are equipped with first collection pipes 17, which are symmetrically distributed. The two first collection pipes 17 are fixed and connected to the second collection pipe 18. The second collection pipe 18 is the main sludge discharge pipe, which concentrates and transports the sludge collected on both sides to the subsequent treatment equipment.

[0026] Please see Figure 3 In this embodiment, sludge pumps 19 are installed on the outer walls of the two first collection pipes 17. The sludge pumps 19 are centrifugal sewage pumps. Drainage pipes 20 are installed on the side walls of the sedimentation tank body 1. Water pumps are installed on the drainage pipes 20. The water pumps can discharge excess water in the sedimentation tank body 1 through the drainage pumps. The sludge pumps 19, water pumps and scraper motors 4 are all electrically connected to an external power supply through cables. Specifically, the device is equipped with an independent electrical control box (not shown in the figure). The electrical control box integrates circuit breakers, AC contactors and PLC controllers. The cables of scraper motors 4, sludge pumps 19 or water pumps are all connected to the output terminals of three AC contactors in the control box after passing through waterproof sleeves. The input terminals of the AC contactors are connected to an external 380V three-phase power supply or 220V single-phase power supply (adapted according to the motor model) through circuit breakers to realize the start and stop control of scraper motors 4, sludge pumps 19 and water pumps, and ensure the sludge scraping and sludge discharge operations.

[0027] In use, the sludge scraping device is installed inside the sedimentation tank body 1. The screws 9 are tightened by the handle to fix the scraper blade 3 to the drive shaft 2 via the mounting plate 8. Simultaneously, the first limit plate 10 is inserted into the limit groove 11 to complete the limit. After installation, the main power switch of the electrical control box is closed. At this time, the circuit inside the control box is in standby mode, and the operation indicator light shows standby. When the operator presses the three start buttons on the control box panel, the PLC controller immediately triggers three AC contactors to drive the scraper motor 4, sludge pump 19, or water pump to connect to the external power supply and start operation. The operation indicator light turns constantly on. The scraper motor 4 drives the drive shaft 2 to rotate via the sprocket and chain 15, and the drive shaft 2 drives the scraper blade 3 to rotate synchronously. The first scraper blade 6 on the side of the scraper blade 3 is in close contact with the pool wall to scrape off the sludge on the side wall, and the second scraper blade 7 at the bottom is in close contact with the bottom of the pool to scrape off the sludge at the bottom of the pool. The scraped sludge is collected into the funnel-shaped discharge port 16 under the combined action of the rotation of the filter screen 5 and its own gravity. Then it can be transported to the subsequent sludge treatment equipment through the first collection pipe 17 and the second collection pipe 18 under the suction action of the sludge pump 19. When it is necessary to stop or maintain, press the stop button, the AC contactor will be disconnected, the scraper motor 4, the sludge pump 19 or the water pump will be de-energized and stopped, and then the main power switch can be turned off. If it is necessary to maintain the scraper blade 3, after ensuring that the main power is disconnected and the equipment is completely stopped, the scraper blade 3 can be removed from the drive shaft 2 for replacement or cleaning by loosening the fastening bolt 9 by the handle.

[0028] It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above. It should be noted that parts not described in this utility model are identical to or can be implemented using existing technology, and that this utility model can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A sludge scraping device for a sedimentation tank, comprising a sedimentation tank body (1) and a sludge scraping mechanism, characterized in that: The sludge scraping mechanism includes a drive component, a drive shaft (2), and a scraper (3). The upper end of the sedimentation tank body (1) is equipped with a drive component, which includes a scraping motor (4). The lower output shaft of the scraping motor (4) is fixedly connected to the drive shaft (2). The scraper (3) is connected to the outer wall of the drive shaft (2) through a limiting component. The sludge scraping mechanism also includes a collection component for collecting sludge.

2. The sludge scraping device for a sedimentation tank according to claim 1, characterized in that: The scraper (3) is arc-shaped, and an opening is provided on the wall of the scraper (3), and a filter screen (5) is installed on the wall of the opening.

3. A sludge scraping device for a sedimentation tank according to claim 1, characterized in that: The first scraper blade (6) is formed between the side of the scraper blade (3) and the corner of the front wall. The included angle of the first scraper blade (6) is less than 30 degrees. The first scraper blade (6) is in contact with the inner wall of the sedimentation tank body (1).

4. A sludge scraping device for a sedimentation tank according to claim 1, characterized in that: The bottom end of the scraper (3) is integrally formed with a second scraping blade (7).

5. A sludge scraping device for a sedimentation tank according to claim 1, characterized in that: The limiting assembly includes a mounting plate (8), fastening bolts (9), and a first limiting plate (10). The mounting plate (8) is welded to the upper wall of the drive shaft (2). The end of the mounting plate (8) near the scraper (3) matches the end face of the scraper (3) and is in contact with the end face of the scraper (3). The mounting plate (8) and the scraper (3) are both threadedly connected with fastening bolts (9). The first limiting plate (10) is integrally formed at the bottom of the drive shaft (2).

6. A sludge scraping device for a sedimentation tank according to claim 5, characterized in that: The fastening bolt (9) is fixedly connected to a handle at the end away from the scraper (3). The scraper (3) has a limiting groove (11) on the bottom wall near the drive shaft (2) that matches the shape of the first limiting plate (10). The first limiting plate (10) is movably disposed in the limiting groove (11).

7. A sludge scraping device for a sedimentation tank according to claim 5, characterized in that: The bottom shape of the first limiting plate (10) matches the second scraper (7), and the wall of the drive shaft (2) is also integrally formed with a second limiting plate (12) that cooperates with the mounting plate (8).

8. A sludge scraping device for a sedimentation tank according to claim 1, characterized in that: The driving component also includes a support plate (13), a housing (14), sprockets and a chain (15). The support plate (13) is fixedly connected to the upper wall of the sedimentation tank body (1). The housing (14) is installed on the support plate (13). The scraping motor (4) is installed inside the housing (14). Sprockets are fixedly connected to the outer walls of the drive shaft (2) and the output shaft of the scraping motor (4). The two sprockets are connected by the chain (15). The upper end of the drive shaft (2) is rotatably connected to the support plate (13).

9. A sludge scraping device for a sedimentation tank according to claim 1, characterized in that: The collection assembly includes a sludge discharge port (16), a first collection pipe (17), and a second collection pipe (18). Two symmetrically distributed sludge discharge ports (16) are opened on the bottom wall of the sedimentation tank body (1). The sludge discharge ports (16) are funnel-shaped. The lower ends of the two sludge discharge ports (16) are equipped with first collection pipes (17) and are symmetrically distributed. The two first collection pipes (17) and the second collection pipe (18) are fixed and connected.

10. A sludge scraping device for a sedimentation tank according to claim 9, characterized in that: Sludge pumps (19) are provided on the outer walls of the two first collection pipes (17), and drain pipes (20) are provided on the side walls of the sedimentation tank body (1). A water pump is provided on the drain pipe (20). The sludge pumps (19), water pumps and scraper motors (4) are all electrically connected to an external power source via cables.

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