A flushing mechanism for a rotary bar screen

Abstract

This utility model discloses a flushing mechanism for a rotary bar screen cleaner, including a bar screen body. Bearing seats extending through to the inner sides are fixedly connected to the outer walls of both sides of the bar screen body. The inner rings of the bearings within the two bearing seats are jointly fixedly connected to a roller. A rotating assembly is installed between the roller and the bar screen body. In this utility model, the roller drives multiple sets of brushes to rotate, mechanically scraping away deposits on the surface of the bar screen rake teeth. A water distribution hood sprays high-pressure water at a specific direction onto the brushes, achieving real-time cleaning of the brushes during the flushing process. This effectively prevents dirt from entangled and clogging the brush bristles, ensuring the continuity and stability of the flushing effect. Simultaneously, a recovery tank and filter screen perform solid-liquid separation on the wastewater after brush flushing, and a water pump reuses the filtered water for brush rinsing, forming a highly efficient water resource recycling system. This significantly reduces external water replenishment and wastewater discharge, lowering operating load and costs.

Description

Technical Field

[0001] This utility model relates to the technical field of rotary bar screen cleaning machines, and in particular to a flushing mechanism for rotary bar screen cleaning machines. Background Technology

[0002] A rotary bar screen is a medium-coarse bar cleaning device used to remove suspended solids from liquids. It separates solids from the liquid through the rotary motion of a rake chain across the bar, achieving the purpose of cleaning. This equipment features high automation, good cleaning effect, low energy consumption, strong corrosion resistance, and reliable operation. Rotary bar screens are widely used in pre-treatment of urban sewage, power plants, waterworks, and large drainage pumping stations. Its working principle involves the rotary motion of the rake chain carrying the intercepted debris to the upper part of the equipment for automatic unloading. Rotary bar screens are widely used in urban drainage pumping stations, water conservancy projects, and urban flood control projects.

[0003] Rotary bar screens typically rely on a chain of rake teeth to scoop up screenings from the water during rotation and remove the debris from the top. However, in actual operation, fine fibers, hair, and other contaminants easily become entangled and adhere to the surface and gaps of the rake teeth, making it difficult to thoroughly clean using only traditional scrapers or rotating brushes.

[0004] To improve the cleaning effect on rake teeth, the industry has introduced mechanical brushing technology on the basis of traditional high-pressure washing, using rotating brushes to remove adhesive dirt. However, this technology has given rise to a new technical challenge in practical application: while cleaning the rake teeth, various fibers, hairs and other contaminants inevitably accumulate and become entangled between the bristles. These contaminants are difficult to remove with the reverse water flow, eventually causing the brush to become scaled, hardened and lose its elasticity, thus greatly reducing its cleaning function and even requiring frequent shutdowns for manual cleaning. This undoubtedly constitutes a new bottleneck in ensuring the long-term stable operation of the equipment.

[0005] Therefore, we propose a flushing mechanism for rotary bar screen cleaners. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a flushing mechanism for a rotary bar screen cleaning machine.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a flushing mechanism for a rotary bar screen cleaner, comprising a bar screen body, wherein bearing seats that extend to the inner side are fixedly connected to the outer walls on both sides of the bar screen body, and a roller is fixedly connected to the inner rings of the bearings built into the two bearing seats, and a rotating component is installed between the roller and the bar screen body.

[0008] Multiple perforated plates are fixedly embedded on the outer surface of the roller, and the perforated plates extend through the outer wall of the roller to the inner wall and are fixedly connected to the roller. Multiple sets of brushes are fixedly connected to the outer surface of the multiple perforated plates, and the spacing between adjacent sets of brushes is consistent with the thickness of the rake teeth of the bar screen body.

[0009] The bottom of the inner surface of the roller is sealed with a water distribution cover, and one end of the water distribution cover is fixedly connected to the bar screen body.

[0010] The inner walls on both sides of the bar screen body are fixedly connected to a recycling component, and a pumping component is installed between the recycling component and the water distribution hood.

[0011] Furthermore, the rotating assembly includes a motor, which is fixedly mounted on the outer wall of one side of the bar screen body via a mounting base. The drive end of the motor is fixedly connected to a drive gear, and the outer surface of the drive gear is meshed with a driven gear. The driven gear is fixedly sleeved on the outer surface of the drum. This gear transmission method has a compact structure, smooth transmission, and can provide sufficient torque to the drum.

[0012] Furthermore, the recycling component includes a recycling bin, which is fixedly connected to the inner walls on both sides of the bar screen body and located directly below the roller. The top opening of the recycling bin is fixedly connected to a waste discharge ramp. This design can effectively receive and collect all the dirt removed by the brush and flushed by the water flow, and guide it through the ramp, creating conditions for subsequent solid-liquid separation and centralized treatment of dirt.

[0013] Furthermore, a filter screen that extends from the top to the bottom is fixedly connected to the top of the waste discharge inclined plate. The filter screen can filter the mixture washed down in real time, realizing the rapid preliminary separation of water and solid waste. The separated water can enter the recycling tank for reuse, thereby improving the water resource utilization rate.

[0014] Furthermore, the pumping assembly includes a water pump, which is fixedly installed on one side of the outer wall of the bar screen body via a mounting base. A three-way solenoid valve is fixedly connected to the input end of the water pump. One of the interfaces of the three-way solenoid valve is fixedly connected to the recycling tank via a fixed pipe, and the remaining interface of the three-way solenoid valve is fixedly connected to an external water source pipeline.

[0015] Furthermore, the output end of the water pump and the water distribution cover are connected by a connecting pipe, which reliably delivers the high-pressure water flow generated by the water pump to the water distribution cover, providing a continuous and sufficient high-pressure rinsing water flow for cleaning the brush.

[0016] The beneficial effects of this utility model are:

[0017] In use, this invention uses a roller to drive multiple sets of brushes to mechanically scrape away the deposits on the surface of the grid rake teeth. A water distribution hood sprays high-pressure water at the brushes in a directional manner, achieving real-time cleaning of the brushes during the brushing process. This effectively prevents dirt from tangling and clogging the bristles, ensuring the continuity and stability of the brushing effect. At the same time, a recycling tank and filter screen perform solid-liquid separation on the wastewater after brush rinsing, and a water pump reuses the filtered water for brush rinsing, forming a highly efficient water resource recycling system. This significantly reduces external water replenishment and wastewater discharge, lowering the operating load and cost. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model;

[0020] Figure 2 This is a partial side view of the structure of this utility model;

[0021] Figure 3 This is a partial three-dimensional structural diagram of the roller of this utility model.

[0022] The attached figures are labeled as follows:

[0023] 1. Bar screen body; 2. Brush; 3. Filter screen; 4. Waste discharge inclined plate; 5. Recycling box; 6. Water distribution cover; 7. Drive gear; 8. Motor; 9. Water pump; 10. Fixed pipe; 11. Three-way solenoid valve; 12. Connecting pipe; 13. Bearing seat; 14. Driven gear; 15. Drum; 16. Perforated plate. Detailed Implementation

[0024] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1-3As shown, a flushing mechanism for a rotary bar screen cleaner is disclosed, comprising a bar screen body 1. Bearing seats 13 extending to the inner sides are fixedly connected to the outer walls of both sides of the bar screen body 1. Rolling bearings are installed within the bearing seats 13, their main function being to provide high-precision, low-friction rotational support. A roller 15 is fixedly connected to the inner rings of the bearings within the two bearing seats 13. A rotating assembly is installed between the roller 15 and the bar screen body 1. The rotating assembly includes a motor 8, which is fixedly mounted on one outer wall of the bar screen body 1 via a mounting base. A drive gear 7 is fixedly connected to the drive end of the motor 8. A driven gear 14 meshes with the outer surface of the drive gear 7, and the driven gear 14 is fixedly sleeved on the outer surface of the roller 15. The motor 8 is electrically connected to a controller used by the bar screen cleaner.

[0026] Multiple perforated plates 16 are fixedly embedded on the outer surface of the roller 15, and the perforated plates 16 extend through the outer wall of the roller 15 to the inner wall and are fixedly connected to the roller 15. Multiple sets of brushes 2 are fixedly connected to the outer surface of the multiple perforated plates 16. The spacing between adjacent sets of brushes 2 is consistent with the thickness of the rake teeth of the bar screen body 1. The brushes 2 are made of corrosion-resistant fiber material.

[0027] The bottom of the inner surface of the drum 15 is sealed with a water distribution cover 6. The bottom of the water distribution cover 6 is fixedly connected with a U-shaped sealing gasket. The U-shaped sealing gasket forms a dynamic sealing contact with the inner wall of the drum 15. Its fixed end is fixedly connected to the bar screen body 1 through a bracket, so that the water distribution cover 6 remains fixed when the drum 15 rotates, and can spray high-pressure water flow directionally onto the orifice plate 16 in the corresponding area.

[0028] A recycling assembly is fixedly connected to the inner walls on both sides of the bar screen body 1. The recycling assembly includes a recycling box 5, which is fixedly connected to the inner walls on both sides of the bar screen body 1 and located directly below the roller 15. A waste discharge ramp 4 is fixedly connected to the top opening of the recycling box 5. A filter screen 3 that extends to the bottom is fixedly connected to the top of the waste discharge ramp 4. The filter screen 3 is used to intercept solid particles and allows the separated liquid to pass through the filter screen 3 into the recycling box 5 below for storage. A liquid level sensor can be installed inside the recycling box 5 during actual operation. The liquid level sensor is electrically connected to the controller used by the bar screen.

[0029] A pumping assembly is installed between the recycling component and the water distribution cover 6. The pumping assembly includes a water pump 9, which is fixedly installed on the outer wall of one side of the bar screen body 1 via a mounting base. A three-way solenoid valve 11 is fixedly connected to the input end of the water pump 9. A fixed pipe 10 is fixedly connected between one port of the three-way solenoid valve 11 and the recycling box 5. A connecting pipe 12 is fixedly connected between the output end of the water pump 9 and the water distribution cover 6. The water pump 9 is electrically connected to the controller used by the bar screen.

[0030] Drive and Rotation Cleaning: The motor 8 is started, and through the meshing of the drive gear 7 and driven gear 14, the motor 8 drives the drum 15 to rotate at a constant speed under the support of the bearing seat 13. The perforated plate 16, fixedly embedded on the outer surface of the drum 15 and equipped with multiple sets of brushes 2, rotates synchronously. When the rake teeth of the bar screen body 1 pass over the rotating drum 15 during the lifting process, their tooth gaps precisely enter the spacing between two adjacent sets of brushes 2. The rotating brushes 2 penetrate deep into the gaps between the rake teeth, mechanically scraping and brushing them, effectively removing entangled materials and dirt adhering to the surface of the rake teeth.

[0031] High-pressure spray assistance: While the brush 2 is mechanically cleaning, the water pump 9 is started. The water pump 9 draws pre-filtered water or external water from the bottom of the recycling tank 5 through the fixed pipe 10 (see the circulation process below for details), and pumps the pressurized water into the fixed water distribution cover 6 through the connecting pipe 12. The water distribution cover 6 is sealed and fitted to the bottom of the inner surface of the rotating drum 15. Its function is to evenly distribute the high-pressure water and spray it outward from the inner wall of the drum 15 through the holes on the perforated plate 16, instantly washing away the dirt stripped by the brush 2, rinsing the brush 2 itself, and maintaining its cleanliness and brushing efficiency.

[0032] Waste Collection and Separation: Waste washed down by high-pressure water, mixed with the water flow, falls downwards under gravity. The falling waste and water first fall onto the waste discharge ramp 4, whose design helps guide the mixture to the filter screen 3 on its surface. The water flows through the filter screen 3 into the recovery tank 5 below, while larger solid waste is intercepted by the filter screen 3 and concentrated in a specific area (such as the equipment slag collection tank or subsequent slag discharge port) under the guidance of the ramp, thus achieving preliminary solid-liquid separation.

[0033] Water resource recycling: The water collected in the recycling tank 5 is relatively clean water that has been filtered out of larger particles. The input end of the water pump 9 is connected to the recycling tank 5 through a three-way solenoid valve 11 and a fixed pipe 10, thereby re-extracting the water in the tank for use as flushing water, forming a closed-loop water circulation system. The three-way solenoid valve 11 can be used to switch the water source when necessary, such as introducing fresh water from outside when the system is initially running or when the water level in the recycling tank 5 is insufficient, and switching the flow path when the recycling tank 5 needs to be emptied or cleaned.

[0034] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A flushing mechanism for a rotary bar screen, comprising a bar screen body (1), characterised in that: The outer walls of both sides of the bar screen body (1) are fixedly connected with bearing seats (13) that extend to the inner side. The inner rings of the bearings built into the two bearing seats (13) are fixedly connected to a roller (15). A rotating component is installed between the roller (15) and the bar screen body (1). Multiple perforated plates (16) are fixedly embedded on the outer surface of the roller (15), and the perforated plates (16) extend through the outer wall of the roller (15) to the inner wall and are fixedly connected to the roller (15). Multiple sets of brushes (2) are fixedly connected to the outer surface of the multiple perforated plates (16), and the spacing between adjacent sets of brushes (2) is consistent with the thickness of the rake teeth of the bar screen body (1). The bottom of the inner surface of the roller (15) is sealed with a water distribution cover (6), and one end of the water distribution cover (6) is fixedly connected to the bar screen body (1). The inner walls on both sides of the bar screen body (1) are fixedly connected with a recycling component, and a pumping component is installed between the recycling component and the water distribution cover (6).

2. A flushing mechanism for a rotary bar screen according to claim 1, characterised in that: The rotating assembly includes a motor (8), and the motor (8) is fixedly mounted on the outer wall of one side of the bar screen body (1) via a mounting base. The drive end of the motor (8) is fixedly connected to a drive gear (7), and the outer surface of the drive gear (7) is meshed with a driven gear (14), and the driven gear (14) is fixedly sleeved on the outer surface of the drum (15).

3. A flushing mechanism for a rotary bar screen according to claim 2, characterised in that: The recycling assembly includes a recycling bin (5), which is fixedly connected to the inner walls on both sides of the bar screen body (1) and located directly below the roller (15). The top opening of the recycling bin (5) is fixedly connected to a waste discharge ramp (4).

4. A flushing mechanism for a rotary bar screen according to claim 3, characterised in that: The top of the waste discharge inclined plate (4) is fixedly connected to a filter screen (3) that extends to the bottom.

5. A flushing mechanism for a rotary bar screen according to claim 3, characterized in that: The pumping assembly includes a water pump (9), which is fixedly installed on one side of the outer wall of the bar screen body (1) via a mounting base. A three-way solenoid valve (11) is fixedly connected to the input end of the water pump (9), and a fixed pipe (10) is fixedly connected to one of the interfaces of the three-way solenoid valve (11) and the recycling box (5).

6. A flushing mechanism for a rotary bar screen according to claim 5, characterised in that: The output end of the water pump (9) and the water distribution cover (6) are connected by a connecting pipe (12).

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