A drum screen that is easy to clean
By installing a hydraulically driven cleaning plate and high-pressure spray brush on the rotary drum screen, the problems of screen clogging and wear are solved, achieving efficient cleaning and extending equipment life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUMEN LAO SHI DISTRICT SEWAGE TREATMENT PLANT CO LTD
- Filing Date
- 2025-08-26
- Publication Date
- 2026-07-21
AI Technical Summary
When treating wastewater containing a large amount of sludge and impurities, the existing rotary drum screen is prone to clogging. Existing flushing devices do not clean thoroughly, and the scraper wears down due to friction with the inner wall of the screen.
A cleaning plate driven by a hydraulic cylinder was designed, integrating a high-pressure nozzle and a brush. The cleaning plate is tilted to match the bar screen cylinder to thoroughly remove attached impurities. The inner wall of the bar screen cylinder is coated with a polytetrafluoroethylene anti-stick coating to reduce sludge adhesion.
It achieves thorough cleaning of the screen, reduces wear, improves water flow capacity, and reduces cleaning frequency and energy consumption.
Smart Images
Figure CN224524188U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of sewage treatment equipment, specifically a rotary drum-type bar screen that is easy to clean. Background Technology
[0002] In wastewater treatment, the bar screen, as a key component, plays a crucial role in intercepting larger suspended solids and impurities in the wastewater. However, existing technologies lack effective screen cleaning designs. When faced with wastewater containing large amounts of sludge and impurities, the continuously operating rotary bar screen becomes clogged with these contaminants, hindering wastewater filtration. This not only reduces the screen's flow capacity but also increases the frequency and difficulty of manual cleaning. Furthermore, existing equipment with flushing devices cannot effectively clean the screens, and some cleaning devices with scrapers, which are in rigid contact with the outer wall of the bar screen, cause wear and tear on the surface over time. Therefore, developing a wastewater treatment device for rotary bar screens that overcomes these shortcomings and is easy to clean is of significant practical importance. Utility Model Content
[0003] To address the above technical problems, this utility model provides a rotary drum-type grid cylinder that is easy to clean, thereby solving the technical problems in the prior art where the washing device does not thoroughly clean the screen and the rigid contact of the scraper washing device causes wear on the inner wall of the grid cylinder.
[0004] To solve the above-mentioned technical problems, the present invention provides a rotary drum bar that is easy to clean, comprising a support base, a base, a bar cylinder with open ends, and a screw conveyor. The bar cylinder is rotatably connected to the base with a hollow center via bearings. The screw conveyor is arranged axially inside the bar cylinder, with its input end located inside the bar cylinder. A slag outlet is provided at the upward-sloping end of the screw conveyor. The screw conveyor is driven by a motor. The shaft of the screw conveyor is fixedly connected to the bar cylinder via a connecting rod. The shaft of the screw conveyor extends downward beyond the base and is rotatably connected to the support base. The screw conveyor is fixedly connected to the ground via a support column. A bracket fixedly connected to the ground is provided above the bar cylinder. A hydraulic cylinder is fixedly connected to the lower end of the bracket. The output end of the hydraulic cylinder is vertically downward and fixedly connected to a cleaning plate. The cleaning plate is located directly above the bar cylinder. A high-pressure nozzle and a brush are fixedly connected to the cleaning plate. The high-pressure nozzle is connected to a water pump via a water pipe. The water pump is fixedly connected to the ground and its input end is connected to a water tank.
[0005] Furthermore, the cleaning plate is inclined along the axial direction of the grid cylinder, and the inclination direction and angle of the cleaning plate are consistent with those of the grid cylinder.
[0006] Furthermore, the inner wall of the grid cylinder is coated with a polytetrafluoroethylene anti-stick coating.
[0007] Furthermore, both the motor and the water pump are controlled by a control switch.
[0008] This utility model has the following advantages compared with the prior art:
[0009] This invention features a cleaning plate equipped with a hydraulic cylinder installed above the screen cylinder. High-pressure nozzles and brushes are integrated onto the cleaning plate. The water jets from the high-pressure nozzles effectively flush away dirt, while the brushes further remove stubborn residues, increasing the removal rate of impurities adhering to the screen and ensuring thorough cleaning. The cleaning plate's tilt direction and angle are consistent with the screen cylinder. Driven by the hydraulic cylinder, the cleaning plate can completely cover the screen on the outer wall of the screen cylinder, increasing the cleaning coverage. It can also detach from the screen during non-working periods, reducing screen wear and extending the service life of the screen cylinder. Furthermore, the water pump is controlled by a switch, facilitating equipment start-up and shutdown and reducing unnecessary cleaning consumption. Attached Figure Description
[0010] Figure 1 This is the main view of the structure of this utility model.
[0011] Figure 2 This is a structural diagram showing the connection between the hydraulic cylinder and the cleaning plate.
[0012] Figure 3 This is a structural diagram showing the rotating connection between the support base and the screw conveyor.
[0013] Figure 4 This is a schematic diagram showing the connection between the base and the grid cylinder.
[0014] Figure 5 This is a schematic diagram of the connecting rod between the rotating shaft and the inside of the grid cylinder.
[0015] In the diagram: 1. Support base, 2. Base, 3. Grille cylinder, 4. Support column, 5. Slag outlet, 6. Motor, 7. Control switch, 8. Screw conveyor, 9. Hydraulic cylinder, 10. Cleaning plate, 11. High-pressure nozzle, 12. Brush, 13. Water pipe, 14. Water pump, 15. Water tank, 16. Bracket. Detailed Implementation
[0016] The present invention will be further described below with reference to the accompanying drawings.
[0017] like Figures 1 to 5The rotary drum screen shown includes a support base 1, a base 2, a screen 3 open at both ends, and a screw conveyor 8. The screen 3 is rotatably connected to the centrally hollowed-out base 2 via bearings. The screw conveyor 8 is axially arranged inside the screen 3. The input end of the screw conveyor 8 is located inside the screen 3, and the inclined upward end of the screw conveyor 8 has a slag outlet 5. Larger suspended solids and impurities separated by the screen 3 enter from the input end of the screw conveyor 8 and are conveyed by the spiral blades inside the screw conveyor 8 to the slag outlet 5 at the upper end for discharge, thus completing the separation of larger suspended solids and impurities. The screw conveyor 8 is driven by a motor 6. The screen 3 is fixedly connected to the rotating shaft of the screw conveyor 8 via a connecting rod. The rotating shaft of the screw conveyor 8 extends downward beyond the base 2 and is rotatably connected to the support base 1. The screw conveyor 8 is fixedly connected to the ground via a support column 4. A bracket 16 fixedly connected to the ground is provided above the screen 3, and a hydraulic cylinder 9 is fixedly connected to the lower end of the bracket 16. The output end of the hydraulic cylinder 9 is vertically downward and fixedly connected to a cleaning plate 10, which is located directly above the grid cylinder 3. A high-pressure nozzle 11 and a brush 12 are fixedly connected to the cleaning plate 10. The output end of the hydraulic cylinder 9 is extended by the hydraulic pump, which moves the cleaning plate 10 downward until the brush 12 at the bottom of the cleaning plate 10 is in close contact with the outer wall of the grid cylinder 3. The extension length is temporarily maintained to clean the grid cylinder 3. After cleaning, the output end of the hydraulic cylinder 9 is shortened by the hydraulic pump, which moves the cleaning plate 10 upward until the cleaning plate 10 returns to its original position. The water nozzle of the high-pressure nozzle 11 faces downward. The high-pressure nozzle 11 is connected to the water pump 14 through the water pipe 13. The water pump 14 is fixedly connected to the ground and its input end is connected to the water tank 15. When the water pump 14 is working, it can pump the cleaning water in the water tank 15 to the high-pressure nozzle 11 through the water pipe 13. Finally, the cleaning water is sprayed out by the high-pressure nozzle 11 to clean the grid cylinder 3.
[0018] In order to effectively clean the outer wall of the grid cylinder 3, the cleaning plate 10 is inclined along the axial direction of the grid cylinder 3. The inclination direction and angle of the cleaning plate 10 are consistent with those of the grid cylinder 3. The cleaning plate 10, in conjunction with the rotating grid cylinder 3, can achieve full coverage of the screen surface.
[0019] To prevent sludge from clogging the inner wall of the bar screen 3, a polytetrafluoroethylene (PTFE) anti-stick coating is applied to the inner wall of the bar screen 3, which can effectively reduce the adhesion of sludge to the inner wall.
[0020] To facilitate the control of motor 6 and water pump 14, both motor 6 and water pump 14 are controlled by control switch 7. There are two sets of control switches 7, each set controlling the start and stop of motor 6 and water pump 14 respectively, allowing for cleaning on demand and effectively reducing water and electricity consumption.
[0021] The specific working process of this utility model is as follows:
[0022] Wastewater flows into the equipment from the inlet end of the bar screen cylinder 3 (fixedly connected to the hollow base 2 in the middle). The motor 6 is started by the control switch 7. The motor 6 drives the screw conveyor 8 to rotate the bar screen cylinder 3 through the connecting rod. When the wastewater flows through the rotating bar screen cylinder 3, the larger suspended solids and impurities are trapped on the screen mesh of the bar screen cylinder 3. When the equipment needs to be cleaned, the cleaning plate 10 is driven by the hydraulic cylinder 9 and rests against the surface of the bar screen cylinder 3. The water pump 14 is started by the control switch. The water pump 14 is connected to the water pipe 13 to supply water to the high-pressure nozzle 11 on the cleaning plate 10 for rinsing. The high-pressure water flow directly impacts the outer surface of the bar screen cylinder 3, washing away most of the attached sludge and impurities. At the same time, the brush 12 on the cleaning plate 10 is in close contact with the outer surface of the bar screen cylinder 3 to scrub. The brush 12 is specially designed to remove stubborn residues that are difficult to be washed away by the high-pressure water flow. Because the cleaning plate 10 is inclined along the axial direction of the grid cylinder 3, and the inclination direction and angle of the cleaning plate 10 are consistent with those of the grid cylinder 3, the cleaning plate 10 can completely cover the surface of the grid cylinder 3 during cleaning, ensuring that the brush 12 and the high-pressure nozzle 11 can effectively contact each other. Furthermore, when not in operation, the cleaning plate 10 can be disengaged from the screen of the grid cylinder 3 by the hydraulic cylinder 9, reducing wear. The washed-down impurities are transported to the slag outlet 5 by the screw conveyor 8 and discharged from the equipment.
Claims
1. A rotary drum-type bar screen that is easy to clean, comprising a support base (1), a base (2), a bar screen (3) with open ends, and a screw conveyor (8), wherein the bar screen (3) and the base (2) with a hollow center are rotatably connected by bearings, the screw conveyor (8) is arranged axially inside the bar screen (3), the input end of the screw conveyor (8) is located inside the bar screen (3), the screw conveyor (8) has a slag outlet (5) at one end inclined upward, the screw conveyor (8) is driven by a motor (6), and the bar screen (3) is fixedly connected to the rotating shaft of the screw conveyor (8) by a connecting rod, characterized in that: The rotating shaft of the screw conveyor (8) extends downward beyond the base (2) and is rotatably connected to the support base (1). The screw conveyor (8) is fixedly connected to the ground through the support column (4). A bracket (16) fixedly connected to the ground is provided above the grid cylinder (3). A hydraulic cylinder (9) is fixedly connected to the lower end of the bracket (16). The output end of the hydraulic cylinder (9) is vertically downward and fixedly connected to a cleaning plate (10). The cleaning plate (10) is located directly above the grid cylinder (3). A high-pressure nozzle (11) and a brush (12) are fixedly connected to the cleaning plate (10). The high-pressure nozzle (11) is connected to a water pump (14) through a water pipe (13). The water pump (14) is fixedly connected to the ground and its input end is connected to a water tank (15).
2. The easy-to-clean rotary drum grille according to claim 1, characterized in that: The cleaning plate (10) is inclined along the axial direction of the grid cylinder (3), and the inclination direction and angle of the cleaning plate (10) are consistent with those of the grid cylinder (3).
3. The easy-to-clean rotary drum grille according to claim 1, characterized in that: The inner wall of the grid cylinder (3) is coated with a polytetrafluoroethylene anti-stick coating.
4. The easy-to-clean rotary drum grille according to claim 1, characterized in that: The motor (6) and water pump (14) are both controlled by the control switch (7).