Grid for domestic sewage treatment
By designing a gap adjustment and cleaning mechanism, the problems of easy clogging and difficult cleaning of traditional bar screens are solved, enabling flexible adjustment of bar gaps and automated cleaning, thus improving the adaptability and efficiency of sewage treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-03-17
AI Technical Summary
Traditional sewage treatment screens are prone to clogging and are difficult to clean. They also have poor adaptability to impurities in sewage, affecting the continuity and efficiency of sewage treatment.
A gap adjustment mechanism and a cleaning mechanism were designed. The gap is adjusted by driving the grid bars to rotate through the drive motor. Combined with the cleaning components of the winding motor and the sliding plate, the cleaning and collection of impurities are automated.
It enables flexible adjustment of the bar spacing, improves the impurity interception effect, reduces the frequency of manual cleaning, ensures the continuity and efficiency of sewage treatment, and facilitates the classification and collection of impurity waste liquid.
Smart Images
Figure CN224001087U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of domestic sewage treatment equipment technology, and in particular to a bar screen for domestic sewage treatment. Background Technology
[0002] In the process of domestic sewage treatment, bar screens play a crucial role as the primary pretreatment stage. Their core task is to separate various solid impurities from sewage, preventing these impurities from entering subsequent treatment equipment and thus avoiding damage to the equipment and affecting the overall treatment effect. Traditional domestic sewage treatment bar screens mostly use a fixed bar structure. As sewage flows through, solid impurities are intercepted and accumulated on the bars. This traditional structure has significant drawbacks. First, over time, the amount of impurities accumulated on the bars gradually increases, causing the drainage gap between adjacent bars to narrow or even become blocked, significantly reducing the water flow capacity and ultimately lowering sewage treatment efficiency. To ensure the normal operation of the sewage treatment system, staff must frequently clean the bars. This process not only consumes a lot of manpower, resources, and time, but also often requires the sewage treatment work to be suspended during cleaning, seriously affecting the continuity and stability of sewage treatment.
[0003] Secondly, because the angle and spacing of traditional bar screens are fixed, they cannot be flexibly adjusted according to the characteristics (such as shape, size, texture, etc.) and concentration changes of impurities in the wastewater. For example, when the wastewater contains large, irregularly shaped impurities, or long strips of branches, plastic strips, and other debris, the fixed bar spacing is insufficient to effectively intercept them. Once these unintercepted impurities enter the subsequent treatment process, they are very likely to become entangled on the impeller of the water pump, causing pump failure; they may also clog pipes, affecting wastewater transportation and treatment, and significantly increasing the frequency and cost of equipment maintenance and repair.
[0004] Therefore, a bar screen for domestic sewage treatment is invented to solve the problems mentioned in the background art. Utility Model Content
[0005] This utility model aims to provide a bar screen for domestic sewage treatment. Through an innovatively designed gap adjustment mechanism and cleaning mechanism, it solves the problems of traditional fixed bar screens, such as impurities easily clogging the drainage gaps, difficulty in cleaning, and poor adaptability to sewage impurities.
[0006] This application provides a bar screen for treating domestic sewage, which adopts the following technical solution: it includes a bar screen box, wherein the bar screen box is rectangular, one end of the bar screen box has an inlet, the bar screen box is provided with a plurality of parallel bars for intercepting solid impurities in sewage, a drainage gap is provided between two adjacent bars, the bars are rotatably connected to the bar screen box, the bar screen box is provided with a gap adjustment mechanism that can drive the bars to rotate, the bars are provided with a plurality of evenly distributed bar sheets, and the bar screen box is provided with a cleaning mechanism for cleaning the bars.
[0007] Optionally, the gap adjustment mechanism includes a drive motor, which is fixed on the grid box. The output end of the drive motor is provided with a connecting rod. The grid box is provided with a movable rod that is hinged to the grid bars. The connecting rod has a slot and a movable column that can be inserted into the slot. When the connecting rod rotates, the movable column drives the movable rod to move.
[0008] Optionally, the cleaning mechanism includes a sliding plate slidably connected to the grid box body. L-shaped sliding grooves are provided on both sides of the grid box body. A slidable sliding sleeve is provided on the sliding plate. A guide rod is rotatably connected inside the sliding sleeve. Both ends of the guide rod are inserted into the sliding grooves and can move within them. A winding motor is provided on the grid box body. A winding shaft is provided at the output end of the winding motor. A winding wheel is provided on the winding shaft. A connecting rope is wound on the winding wheel. A rotatable guide wheel is provided on the grid box body. The other end of the connecting rope is wound around the outside of the guide wheel and connected to the sliding plate. A first compression spring is provided on the sliding plate. The other end of the first compression spring is fixed to the grid box body. A cleaning component for cleaning the grid bars is provided on the sliding sleeve.
[0009] Optionally, the cleaning assembly includes a cleaning rod with multiple evenly distributed fixing blocks. Each fixing block has a slidable scraper on both sides. A second compression spring is mounted on each scraper, with the other end of the spring fixed to the fixing block. The fixing blocks are located between two adjacent grid plates.
[0010] Optionally, a collection hopper is provided at one end of the grid box, and a waste liquid hopper is provided at the bottom of the grid box.
[0011] In summary, this application includes the following beneficial technical effects:
[0012] 1. Flexible Gap Adjustment: Utilizing a gap adjustment mechanism, the drive motor rotates the connecting rod, causing the movable column to move within the groove of the connecting rod, which in turn pushes the movable rod to slide, ultimately achieving the rotation of the bar grid. This design allows the gap between the bar grids to be flexibly adjusted according to the actual situation of impurities in the wastewater, effectively improving the interception effect of different types of impurities and enhancing the adaptability and processing capacity of the screen.
[0013] 2. High-efficiency automatic cleaning: The winding motor in the cleaning mechanism drives the sliding plate to slide along the bar screen body via a winding wheel and connecting rope, and the cleaning component on the sliding sleeve moves accordingly. The fixed block in the cleaning component is located between adjacent bar screens, and the sliding scraper, under the action of the second compression spring, tightly adheres to the surface of the bar screen and bar screen, effectively scraping away accumulated impurities. This automatic cleaning method greatly reduces the frequency of manual cleaning, ensures the continuity of sewage treatment work, and improves treatment efficiency.
[0014] 3. Convenient collection of impurities and waste liquid: The collection hopper at one end of the bar screen can easily collect the cleaned solid impurities, while the waste liquid hopper at the bottom is used to collect the waste liquid generated during the treatment process. This design achieves the separate collection of impurities and waste liquid, providing convenience for subsequent treatment work and helping to improve the overall convenience and environmental friendliness of wastewater treatment. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of the device. Figure I ;
[0016] Figure 2 This is a schematic diagram of the overall structure of the device. Figure II ;
[0017] Figure 3 This is a top view of the device;
[0018] Figure 4 This is a cross-sectional view of the overall structure of the device;
[0019] Figure 5 This is a schematic diagram of the structure inside the grid box of this device;
[0020] Figure 6 This is a partial enlarged view of the cleaning components of this device;
[0021] Figure 7 This is a schematic diagram of the grille box of this device;
[0022] The components are as follows: 1. Grille box; 2. Inlet; 3. Grille bar; 4. Drainage gap; 5. Gap adjustment mechanism; 6. Grille plate; 7. Cleaning mechanism; 8. Drive motor; 9. Connecting rod; 10. Movable rod; 11. Groove; 12. Movable column; 13. Sliding plate; 14. Sliding groove; 15. Sliding sleeve; 16. Guide rod; 17. Winding motor; 18. Winding shaft; 19. Winding wheel; 20. Connecting rope; 21. Guide wheel; 22. First compression spring; 23. Cleaning assembly; 24. Cleaning rod; 25. Fixing block; 26. Sliding scraper; 27. Second compression spring; 28. Collection hopper; 29. Waste liquid hopper. Detailed Implementation
[0023] The present application will be further described in detail below with reference to the accompanying drawings. In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present utility model.
[0024] Reference Figure 1 , Figure 2 One embodiment shown is as follows: a bar screen for domestic sewage treatment includes a rectangular bar screen box 1. In this embodiment, an inlet 2 is provided at one end of the bar screen box 1 for sewage to flow in. Inside the bar screen box 1 are multiple parallel bar strips 3, which are rotatably connected to the side walls of the bar screen box 1 via rotating shafts. This rotatable connection allows the bar strips 3 to rotate flexibly under the drive of a gap adjustment mechanism 5. The gap adjustment mechanism 5 is installed inside the bar screen box 1 and drives the rotation of the bar strips 3. Several bar screen pieces 6 are evenly distributed and fixed on the bar strips 3 to assist in intercepting impurities in the sewage. A cleaning mechanism 7 is provided on the bar screen box 1 to clean the impurities accumulated on the bar strips 3.
[0025] The implementation principle of the above embodiment is as follows: sewage flows into the bar screen 1 from the inlet 2, passes through the parallel bar 3, and impurities are intercepted by the bar 3 and the screen plates 6. The sewage flows out from the discharge gap 4. The gap adjustment mechanism 5 drives the bar 3 to rotate, changing the gap size between the bar 3 to adapt to the interception requirements of different impurities. The cleaning mechanism 7 cleans the bar 3 when impurities accumulate, ensuring the normal operation of the bar screen.
[0026] Reference Figure 3 , Figure 4One embodiment shown is as follows: The gap adjustment mechanism 5 includes a drive motor 8 fixed to the grid box 1. In this embodiment, the drive motor 8 is securely fixed to the outer wall of the grid box 1 with bolts to ensure that it will not be displaced during operation. The output end of the drive motor 8 is firmly fixed to the connecting rod 9 by key connection or welding. When the drive motor 8 is powered on, the rotation of the output shaft can precisely drive the connecting rod 9 to rotate synchronously. The grid box 1 is provided with a movable rod 10, which is hinged to the grid bar 3 through a hinge seat. This hinged connection allows the movable rod 10 to smoothly drive the grid bar 3 to rotate around its rotation connection point with the grid box 1 when it moves. The connecting rod 9 has a pre-cut slot 11, and the movable column 12 provided on the movable rod 10 is precisely inserted into the slot 11. This connection structure ensures that when the connecting rod 9 rotates, the movable column 12 can slide relative to the slot 11, thereby driving the movable rod 10 to move along a specific trajectory within the grid box 1.
[0027] The implementation principle of the above embodiment is as follows: When the drive motor 8 starts, its output end drives the connecting rod 9 to start rotating. Since the movable column 12 is inserted into the slot 11 of the connecting rod 9, the circumferential rotation of the connecting rod 9 causes the movable column 12 to move within the slot 11. The movement of the movable column 12 further pushes the movable rod 10 to move within the bar screen 1. Because the movable rod 10 and the bar 3 are hinged, the movement of the movable rod 10 will cause the bar 3 to rotate around its axis of rotation. Through this transmission process, the gap between the bar 3 can be flexibly adjusted. Operators can start the drive motor 8 according to the actual situation of impurities in the wastewater, and change the gap size between the bar 3 through the gap adjustment mechanism 5, thereby effectively improving the interception effect on different types of impurities and enhancing the adaptability and treatment capacity of the bar screen in the wastewater treatment process.
[0028] Reference Figure 2 , Figure 7One embodiment shown is as follows: The cleaning mechanism 7 includes a sliding plate 13, which is mounted on the grid box 1 via a sliding connection structure such as a guide rail, allowing it to slide smoothly on the grid box 1. L-shaped sliding grooves 14 are provided on both sides inside the grid box 1, providing a track for the subsequent movement of the guide rod 16. A sliding sleeve 15 is provided on the sliding plate 13, which is slidably connected to the sliding plate 13 via a sliding rail or similar structure, allowing the sliding sleeve 15 to slide relative to the sliding plate 13. A guide rod 16 is rotatably connected inside the sliding sleeve 15, with both ends of the guide rod 16 inserted into the sliding grooves 14 on both sides. In this embodiment, rollers can be provided at both ends of the guide rod 16, which roll within the sliding grooves 14 to reduce friction and improve the smoothness of the guide rod 16's movement. A winding motor 17 is fixedly mounted on the grid box 1, and a winding shaft 18 is fixedly connected to the output end of the winding motor 17. A winding wheel 19 is fixedly mounted on the winding shaft 18. When the winding motor 17 operates, it drives the winding shaft 18 and the winding wheel 19 to rotate. A connecting rope 20 is wound on the winding wheel 19. Simultaneously, a rotatable guide wheel 21 is rotatably connected to the grid box 1. One end of the connecting rope 20 originates from the winding wheel 19, passes over the guide wheel 21, and connects to the sliding plate 13. A first compression spring 22 is also provided on the sliding plate 13, with one end fixed to the sliding plate 13 and the other end fixed to the grid box 1. A cleaning assembly 23 is installed on the sliding sleeve 15 for cleaning the grid bars 3.
[0029] The implementation principle of the above embodiment is as follows: When the winding motor 17 starts, the winding wheel 19 rotates to wind up the connecting rope 20, and the connecting rope 20 pulls the sliding plate 13 to slide on the grid box 1. During the sliding process of the sliding plate 13, the sliding sleeve 15 slides on the sliding plate 13, and the guide rod 16 moves within the L-shaped sliding groove 14 to ensure the smooth movement of the sliding plate 13. When the winding motor 17 reverses, the connecting rope 20 is released, and the sliding plate 13 returns to its original position under the action of the first compression spring 22. During the movement of the sliding plate 13, the cleaning component 23 on the sliding sleeve 15 cleans the grid bars 3. This structural design, utilizing the winding motor 17 and the guide structure, achieves efficient reciprocating motion of the cleaning component 23, improving the cleaning effect.
[0030] Reference Figure 6One embodiment shown is as follows: the cleaning assembly 23 includes a cleaning rod 24, which is mounted on a sliding sleeve 15. When the sliding sleeve 15 moves with the sliding plate 13, the cleaning rod 24 moves accordingly. Multiple fixing blocks 25 are evenly distributed on the cleaning rod 24, and these fixing blocks 25 are used to mount sliding scrapers 26. Slidable scrapers 26 are slidably connected to both sides of the fixing blocks 25, and the sliding scrapers 26 and the fixing blocks 25 are slidably connected via a slide rail or similar structure. A second compression spring 27 is provided on the sliding scraper 26, with one end fixed to the sliding scraper 26 and the other end fixed to the fixing block 25. In this embodiment, the second compression spring 27 is always in a compressed state, providing pressure to the sliding scraper 26 in the direction of the grid strips 3. The fixing block 25 is located between two adjacent grid strips 6, so that the sliding scraper 26 can better contact the grid strips 3 during the cleaning process.
[0031] The implementation principle of the above embodiment is as follows: When the cleaning rod 24 moves with the sliding sleeve 15, the fixing block 25 is located between adjacent grid plates 6, and the sliding scraper 26 is tightly pressed against the grid bar 3 under the action of the second compression spring 27. As the cleaning rod 24 moves, the sliding scraper 26 slides along the surface of the grid bar 3, scraping off the solid impurities attached to the grid bar 3. Due to the presence of the second compression spring 27, the sliding scraper 26 can adapt to the unevenness of the grid bar 3 surface, ensuring the cleaning effect. This structural design enables the cleaning assembly 23 to efficiently clean the grid bar 3, ensuring the normal operation of the grid.
[0032] Reference Figure 2 One embodiment shown is as follows: a collection hopper 28 is installed at one end of the bar screen 1. The collection hopper 28 is fixed to the bar screen 1 by welding or bolting, and is used to collect solid impurities removed by the cleaning mechanism 7. A waste liquid hopper 29 is fixed to the bottom of the bar screen 1 by bolts. The waste liquid hopper 29 is also fixed to the bottom of the bar screen 1 by a suitable connection method, and is used to collect wastewater after bar screen treatment.
[0033] The implementation principle of the above embodiment is as follows: when the cleaning mechanism 7 cleans the grid bars 3, the scraped solid impurities fall into the collection hopper 28 for centralized treatment. After the solid impurities are intercepted by the grid bars 3, the wastewater flows from the bottom of the grid box 1 into the waste liquid hopper 29 for subsequent discharge or further treatment. This structural design makes the grid treatment process more complete and efficient, and facilitates the classification and treatment of treated wastewater and impurities.
[0034] The working principle of this device is as follows: Sewage flows into the bar screen 1 from the inlet 2, and solid impurities are intercepted by the bar screen 3. When the impurities in the sewage change, the drive motor 8 is started, and its output connecting rod 9 rotates. The slot 11 on the connecting rod 9 drives the movable column 12 on the movable rod 10, causing the movable rod 10 to move, which in turn pushes the bar screen 3, which is hinged to it, to rotate, changing the drainage gap 4. When the cleaning mechanism 7 is working, the winding motor 17 is started, the winding wheel 19 winds up the connecting rope 20, and pulls the sliding plate 13 to slide on the bar screen 1. The sliding sleeve 15 slides on the sliding plate 13, and the guide rod 16 moves in the L-shaped sliding groove 14 to ensure the smooth movement of the sliding plate 13. The cleaning component 23 on the sliding sleeve 15 moves accordingly. The fixing block 25 on the cleaning rod 24 in the cleaning component 23 is located between adjacent grid plates 6. The sliding scraper blocks 26 on both sides of the fixing block 25 are in close contact with the grid bar 3 under the action of the second compression spring 27. As the cleaning rod 24 moves, it scrapes off the impurities. The impurities fall into the collection hopper 28, and the treated sewage flows into the waste liquid hopper 29 from the bottom.
[0035] The working principle of this device has been explained through the above embodiments. These embodiments only illustrate several implementation methods of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A screen for domestic sewage treatment, comprising a screen box (1), characterized in that: The grid box (1) is opened to rectangle, one end of the grid box (1) is provided with water inlet (2), the grid box (1) is provided with multiple parallel arranged grating (3) inside, for intercepting solid impurities in sewage, adjacent two grating (3) between opening has drainage gap (4), the grating (3) is rotatably connected in the grid box (1), the gap adjustment mechanism (5) for driving grating (3) rotation is provided in the grid box (1), the grating (3) is provided with several evenly distributed grating piece (6), the grid box (1) is provided with the cleaning mechanism (7) for the cleaning of grating (3).
2. The grid according to claim 1, characterized in that: The gap adjustment mechanism (5) includes drive motor (8), the drive motor (8) is fixed on the grid box (1), the output end of the drive motor (8) is provided with connecting rod (9), the grid box (1) is provided with movable movable rod (10), the movable rod (10) is hingedly connected with grating (3), the connecting rod (9) is provided with notch (11), the movable rod (10) is provided with movable column (12) that can be inserted into the notch (11), when the connecting rod (9) rotates, the movable column (12) drives the movable rod (10) to generate activity.
3. The grid according to claim 1, characterized in that: The cleaning mechanism (7) includes sliding plate (13), the sliding plate (13) is slidably connected on the grid box (1), both sides in the grid box (1) are provided with L-shaped sliding groove (14), the sliding plate (13) is provided with slidable sliding sleeve (15), the sliding sleeve (15) is rotatably connected with guide rod (16), both ends of the guide rod (16) are inserted into the sliding groove (14) and can be moved in the sliding groove (14), the grid box (1) is provided with winding motor (17), the output end of the winding motor (17) is provided with winding shaft (18), the winding shaft (18) is provided with winding wheel (19), the winding wheel (19) is wound with connecting rope (20), the grid box (1) is provided with rotatable guide wheel (21), the other end of the connecting rope (20) is wound on the outside of the guide wheel (21) and is connected with the sliding plate (13), the sliding plate (13) is provided with first compression spring (22), the other end of the first compression spring (22) is fixed on the grid box (1), the sliding sleeve (15) is provided with cleaning assembly (23) for cleaning grating (3).
4. The grid according to claim 3, characterized in that: The cleaning assembly (23) includes cleaning rod (24), the cleaning rod (24) is provided with multiple evenly distributed fixed blocks (25), the both sides of the fixed block (25) are provided with slidable sliding scraping block (26), the sliding scraping block (26) is provided with second compression spring (27), the other end of the second compression spring (27) is fixed on the fixed block (25), the fixed block (25) is located between two adjacent grating piece (6).
5. The grid according to claim 1, characterized in that: One end of the grid box (1) is provided with collecting hopper (28), the bottom of the grid box (1) is provided with waste liquid hopper (29).