A grating device for water pollution treatment

Abstract

The utility model is suitable for sewage treatment technical field provides a kind of grating device for water pollution control, through the core design of " bidirectional cleaning + self-cleaning linkage", effectively solve the problem of traditional grating tine " hang dirt ", conveying belt accumulates dirt, greatly improve the impurity interception and equipment maintenance efficiency.The cleaning mechanism of device adopts the staggered layout of cleaning disc and tine, and the arc surface bristles of the cleaning disc can clean the sticky impurities on the surface of the conveyor belt. The end surface bristles can penetrate into the gap between the tines to remove entanglements such as fibers and plastic bags. The bidirectional coverage has no dead angle, solving the problem that a single cleaning direction cannot be considered. The equally spaced cleaning discs ensure that each row of tines and the conveyor belt area are covered, preventing local impurity accumulation from affecting processing efficiency. At the same time, the arc-shaped scraping element of the decontamination assembly is compatible with the arc of the cleaning disc. The scraping groove can automatically remove the impurities attached to the bristles when the cleaning disc rotates, achieving self-cleaning of the cleaning assembly without the need for manual cleaning during shutdown, ensuring continuous operation of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically a bar screen device for water pollution control. Background Technology

[0002] In water pollution control scenarios such as urban sewage treatment, industrial wastewater pretreatment, and river water purification, bar screens are core pretreatment equipment for intercepting floating debris (such as plastic bags, branches, and fibrous impurities) in sewage. Their interception effectiveness directly determines the operational efficiency and equipment safety of subsequent treatment units such as sedimentation tanks and biological reactors. Bar screens, through a bar screen mechanism driving a rake tooth structure, separate floating debris from the surface of sewage and the water, preventing it from clogging pipes, entangled in pumps, or affecting subsequent treatment processes. They are an indispensable and crucial link in the water pollution control process.

[0003] However, existing wastewater treatment bar screens have significant operational and maintenance shortcomings: the rake teeth, as the core component that directly contacts floating debris, are prone to "sludge buildup" during interception operations due to impurities entanglement and the adhesion of sticky substances (such as oil and sludge mixtures). After prolonged operation, the floating debris hanging on the rake teeth gradually accumulates, which on the one hand narrows the screen gap, leading to a decrease in water flow and a longer wastewater retention time, thus affecting treatment efficiency; on the other hand, the accumulated impurities increase the operating load of the bar screen, causing equipment jamming, motor overload, and other malfunctions, and may even require shutdown and manual cleaning.

[0004] Therefore, developing a bar screen device for water pollution treatment that has the functions of automatically cleaning rake teeth, reducing the accumulation of floating debris, and ensuring the continuous and stable operation of the equipment has become an urgent need to solve the bar screen maintenance problem and improve the efficiency of water pollution treatment. Utility Model Content

[0005] The purpose of this invention is to provide a bar screen device for water pollution treatment, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A bar screen device for water pollution treatment includes a main body, a conveyor belt, and rake teeth. The main body also includes a cleaning mechanism, which includes a rotating rod rotatably installed inside the main body and multiple cleaning discs fixedly installed on the rotating rod. The rotating rod is driven by a motor installed outside the main body. The multiple cleaning discs are evenly spaced and staggered with the rake teeth. The curved surface and end face of the cleaning discs are provided with bristles. The cleaning mechanism also includes a decontamination component for cleaning dirt from the bristles.

[0007] As a further embodiment of this utility model: the decontamination component includes a mounting plate fixedly installed inside the main body of the device and scraping parts fixedly installed on the mounting plate at equal intervals. Multiple scraping parts are arranged one-to-one with the cleaning disc and located on one side of the cleaning disc. The scraping parts are arc-shaped and have scraping grooves on them for the cleaning disc to rotate.

[0008] As a further embodiment of this utility model: the main body of the device is also provided with a striking component, which includes a rotating shaft rotatably installed in the main body of the device, a plurality of striking rods fixedly installed on the rotating shaft, and a driving unit for intermittently rotating the rotating shaft. The plurality of striking rods are staggered from the cleaning disc, and the rotation trajectory of the striking rods interferes with the rotating rods. A rubber sleeve is also provided on the striking rods.

[0009] As a further embodiment of this utility model: the drive unit includes a fixed frame, a reset torsion spring, a first gear and a second gear. The fixed frame is fixedly installed inside the main body of the device. The rotating shaft rotates through the fixed frame and a reset torsion spring is installed on the rotating shaft. The first gear is coaxially fixedly installed on the rotating shaft. The second gear is meshed on one side of the first gear. The second gear is an incomplete gear.

[0010] As a further embodiment of this utility model: the driving unit is provided in two sets, and the two sets of driving units are symmetrically arranged on both sides of multiple striking rods.

[0011] As a further embodiment of this invention: the second gear is coaxially fixedly mounted on the rotating rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention effectively solves the problems of dirt accumulation on traditional grid rake teeth and conveyor belts through its core design of "two-way cleaning + self-cleaning linkage," significantly improving impurity interception and equipment maintenance efficiency. The cleaning mechanism employs a staggered layout of cleaning discs and rake teeth. The curved bristles of the cleaning discs can sweep away sticky impurities from the conveyor belt surface, while the end-face bristles can penetrate deep into the gaps between the rake teeth to remove tangled materials such as fibers and plastic bags. This two-way coverage eliminates blind spots, solving the problem of insufficient coverage in a single cleaning direction. The evenly spaced cleaning discs ensure that each row of rake teeth and the conveyor belt area are covered, preventing localized impurity accumulation that could affect processing efficiency. Simultaneously, the curved scraper of the decontamination component is adapted to the curvature of the cleaning disc. The scraper groove automatically scrapes away impurities attached to the bristles as the cleaning disc rotates, achieving self-cleaning of the cleaning component. This eliminates the need for manual cleaning during machine shutdown, ensuring continuous equipment operation.

[0013] This invention's striking assembly utilizes the power of a rotating rod to drive an incomplete gear. Through gear meshing and the cooperation of a return torsion spring, the striking rod intermittently strikes the rotating rod, causing the cleaning disc bristles to vibrate and loosen stubborn impurities. Combined with a scraping component, this further enhances cleaning efficiency. No additional motor is required, simplifying the structure and reducing energy consumption. The overall design achieves a closed-loop function of "impurity interception - equipment cleaning - component self-maintenance," enabling continuous and stable operation without manual intervention. This provides efficient and reliable equipment support for the bar screen filtration stage in water pollution control. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of a bar screen device for water pollution treatment; Figure 2 for Figure 1 Enlarged view of the Chinese cleaning agency; Figure 3 for Figure 2 Enlarged view of section A; Figure 4 for Figure 2 Side view sectional view; In the diagram: 1. Main body of the device; 2. Rake teeth; 3. Cleaning mechanism; 4. Rotating rod; 5. Cleaning disc; 6. Motor; 7. Brush bristles; 8. Mounting plate; 9. Scraper; 10. Scraper groove; 11. Rotating shaft; 12. Striking rod; 13. Rubber sleeve; 14. Fixing frame; 15. Return torsion spring; 16. First gear; 17. Second gear; 18. Conveyor belt. Detailed Implementation

[0015] The technical solution of this patent will be further described in detail below with reference to specific embodiments. Example 1

[0016] Please see Figure 1-4 A bar screen device for water pollution treatment includes a main body 1, a conveyor belt 18, and rake teeth 2. The main body 1 provides an installation and protection frame for the entire bar screen device, ensuring the coordinated operation of each component and isolating the core components from external environmental interference. The conveyor belt 18 drives the rake teeth 2 to circulate, realizing the continuous interception and transportation of floating objects in the sewage. The rake teeth 2 directly contact and hook the floating objects, and are the core component for intercepting impurities. The main body 1 of the device is also equipped with a cleaning mechanism 3. The cleaning mechanism 3 includes a rotating rod 4 rotatably installed inside the main body 1 and multiple cleaning discs 5 fixedly installed on the rotating rod 4. The rotating rod 4 is driven by a motor 6 installed outside the main body 1. The motor 6 provides stable power to the cleaning mechanism 3, driving the rotating rod 4 and the cleaning discs 5 to rotate synchronously. The cleaning discs 5 and the rake teeth 2 are staggered to ensure that the bristles 7 can accurately act on the gaps between the rake teeth 2 and the surface of the conveyor belt 18 when rotating, avoiding cleaning dead corners. Multiple cleaning discs 5 are arranged at equal intervals, and the curved surface and end face of the cleaning discs 5 are provided with bristles 7. The bristles 7 on the curved surface of the cleaning disc 5 can sweep away sticky impurities attached to the surface of the conveyor belt 18, and the bristles 7 on the end face can penetrate into the gaps between the rake teeth 2 to remove tangled fibers, plastic bags and other floating objects. The bidirectional cleaning avoids the accumulation of impurities. The evenly spaced layout ensures that each row of rake teeth 2 and the area of ​​the conveyor belt 18 can be covered, improving the uniformity of cleaning and solving the core problems of "dirt stuck" on the rake teeth and dirt accumulation on the conveyor belt in the background technology. The cleaning mechanism 3 also includes a decontamination component, which is used to clean dirt from the bristles 7. The decontamination component prevents the bristles 7 from having reduced cleaning ability due to impurities attached to them, thus ensuring the continuous and efficient operation of the cleaning mechanism 3. Example 2

[0017] Please see Figure 2 and Figure 4 The cleaning component includes a mounting plate 8 fixedly installed inside the main body 1 and scraping parts 9 fixedly installed on the mounting plate 8 at equal intervals. Multiple scraping parts 9 are arranged one-to-one with the cleaning disc 5 and are located on one side of the cleaning disc 5. The scraping parts 9 are arc-shaped and have scraping grooves 10 for the cleaning disc 5 to rotate. The mounting plate 8 provides stable support for the scraping parts 9 to ensure their fixed position. The arc-shaped scraping parts 9 are adapted to the curvature of the cleaning disc 5. The inner wall of the scraping groove 10 can closely fit the bristles 7. When the cleaning disc 5 drives the bristles 7 to rotate and pass through the scraping groove 10, the scraping groove 10 can scrape off the dirt attached to the end face and arc surface of the bristles 7, realizing automatic cleaning of the bristles 7 without manual cleaning. Example 3

[0018] Please see Figure 2 and Figure 3 The main body 1 of the device is also equipped with a striking component, which includes a rotating shaft 11 rotatably installed in the main body 1, multiple striking rods 12 fixedly installed on the rotating shaft 11, and a drive unit that drives the rotating shaft 11 to rotate intermittently. The multiple striking rods 12 are staggered from the cleaning disc 5, and the rotation trajectory of the striking rods 12 interferes with the rotating rod 4. A rubber sleeve 13 is also fitted on the striking rods 12. The striking component intermittently strikes the rotating rod 4, causing the rotating rod 4 to drive the cleaning disc 5 to vibrate slightly, loosening the stubborn impurities attached to the bristles 7, and improving the cleaning effect in conjunction with the scraping part 9. The rubber sleeve 13 prevents damage to the rotating rod 4 during striking and reduces impact noise. Example 4

[0019] Please see Figure 2 and Figure 3The drive unit includes a fixed frame 14, a reset torsion spring 15, a first gear 16, and a second gear 17. The fixed frame 14 is fixedly installed inside the main body 1 of the device. The rotating shaft 11 rotates through the fixed frame 14, and the reset torsion spring 15 is installed on the rotating shaft 11. The first gear 16 is coaxially fixedly installed on the rotating shaft 11. The second gear 17 is meshed on one side of the first gear 16. The second gear 17 is an incomplete gear. The fixed frame 14 provides mounting support for the rotating shaft 11 and the gear assembly to ensure stable transmission. When the second gear 17 (incomplete gear) rotates, it meshes with the first gear 16, causing the rotating shaft 11 to rotate, which moves the striking rod 12 away from the rotating rod 4 and twists the reset torsion spring 15 to store elastic potential energy. After the meshing disappears, the reset torsion spring 15 releases potential energy, causing the rotating shaft 11 to reverse, so that the striking rod 12 quickly strikes the rotating rod 4 to achieve intermittent striking action. Example 5

[0020] Please see Figure 2 The drive unit is provided in two sets, which are symmetrically arranged on both sides of the multiple striking rods 12. The symmetrical layout makes the force on both ends of the rotating shaft 11 balanced, avoids the displacement of the rotating shaft 11 caused by unilateral drive, and ensures that the striking rod 12 can accurately act on the rotating rod 4, thereby improving the striking stability. Example 6

[0021] Please see Figure 2-4 The second gear 17 is coaxially fixed on the rotating rod 4. The second gear 17 rotates synchronously with the power of the rotating rod 4, realizing "power reuse of the cleaning mechanism", eliminating the need for an additional motor drive, simplifying the device structure and reducing energy consumption.

[0022] Working principle: When the bar screen is running, the conveyor belt 18 drives the rake teeth 2 in a cyclical motion, which hooks floating debris from the sewage and transports it upwards. Simultaneously, the motor 6 is started, driving the rotating rod 4 to rotate. The rotating rod 4 synchronously drives the cleaning disc 5 and the second gear 17 to rotate. The cleaning disc 5 rotates in the opposite direction to the rake teeth 2, and its arc-shaped bristles 7 clean impurities from the surface of the conveyor belt 18, while the end-face bristles 7 penetrate the gaps between the rake teeth 2 to remove tangled debris. When the second gear 17 (an incomplete gear) rotates, it intermittently meshes with the first gear 16. During the meshing phase, it drives the rotating shaft 11 to rotate and twists the return torsion spring 15. After the meshing dissipates, the return torsion spring 15 drives the rotating shaft 11 to reverse, causing the striking rod 12 to intermittently strike the rotating rod 4, vibrating the bristles 7 on the cleaning disc 5 and loosening stubborn impurities. When the cleaning disc 5 continues to rotate to the scraper 9, the inner wall of the scraper groove 10 scrapes away the impurities attached to the bristles 7, completing the cleaning of the bristles 7. The entire process achieves automatic cleaning of the rake teeth 2 and the conveyor belt 18, as well as self-cleaning of the cleaning components, without the need for manual maintenance during machine downtime. This solves the problems of reduced processing efficiency and equipment failure caused by "dirt" on the rake teeth in the background technology, and ensures the continuous and stable operation of the bar screen device.

[0023] The motor involved in the embodiments, its matching control system, electromagnetic switch and pipeline circuit can also be provided by the manufacturer. Those skilled in the art can fully implement it, so there is no need to elaborate. The content protected by this utility model does not involve any improvement to the internal structure and method.

[0024] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bar screen device for water pollution treatment, comprising a main body (1), a conveyor belt (18), and rake teeth (2), characterized in that, The device body (1) is also equipped with a cleaning mechanism (3). The cleaning mechanism (3) includes a rotating rod (4) rotatably installed in the device body (1) and multiple cleaning discs (5) fixedly installed on the rotating rod (4). The rotating rod (4) is driven by a motor (6) installed outside the device body (1). The multiple cleaning discs (5) are arranged at equal intervals, and the cleaning discs (5) are staggered with the rake teeth (2). The arc surface and end face of the cleaning discs (5) are provided with bristles (7). The cleaning mechanism (3) also includes a decontamination component, which is used to clean the dirt on the bristles (7).

2. The bar screen device for water pollution treatment according to claim 1, characterized in that, The cleaning component includes a mounting plate (8) fixedly installed in the main body (1) of the device and scraping parts (9) fixedly installed on the mounting plate (8) at equal intervals. Multiple scraping parts (9) are arranged one-to-one with the cleaning disc (5) and located on one side of the cleaning disc (5). The scraping parts (9) are arc-shaped and have scraping grooves (10) for the cleaning disc (5) to rotate.

3. The bar screen device for water pollution treatment according to claim 1, characterized in that, The main body (1) of the device is also provided with a striking component. The striking component includes a rotating shaft (11) rotatably installed in the main body (1), a plurality of striking rods (12) fixedly installed on the rotating shaft (11), and a driving unit that drives the rotating shaft (11) to rotate intermittently. The plurality of striking rods (12) are staggered from the cleaning disc (5), and the rotation trajectory of the striking rods (12) interferes with the rotating rod (4). A rubber sleeve (13) is also fitted on the striking rods (12).

4. The bar screen device for water pollution treatment according to claim 3, characterized in that, The drive unit includes a fixed frame (14), a reset torsion spring (15), a first gear (16), and a second gear (17). The fixed frame (14) is fixedly installed inside the main body (1) of the device. The rotating shaft (11) rotates through the fixed frame (14), and the reset torsion spring (15) is installed on the rotating shaft (11). The first gear (16) is coaxially fixedly installed on the rotating shaft (11). The second gear (17) is meshed on one side of the first gear (16). The second gear (17) is an incomplete gear.

5. The bar screen device for water pollution treatment according to claim 4, characterized in that, The drive unit is provided in two sets, and the two sets of drive units are symmetrically arranged on both sides of multiple striking rods (12).

6. The bar screen device for water pollution treatment according to claim 4, characterized in that, The second gear (17) is coaxially fixedly mounted on the rotating rod (4).

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