A self-cleaning device for sewage pumps

Abstract

This utility model discloses a self-cleaning device for sewage pumps, including a conical filter screen, a hydraulic impeller, and a V-shaped scraper. The conical filter screen is installed at the inlet of the sewage pump, and the hydraulic impeller is located on the inlet side of the conical filter screen, rotating under the impact of water flow. The V-shaped scraper contacts the outer surface of the conical filter screen and is driven by the hydraulic impeller. This device utilizes water flow energy to drive the V-shaped scraper to clean the conical filter screen, eliminating the need for an additional power source and solving the problems of high cost and high failure rate of motor-driven solutions. The V-shaped scraper is equipped with a brush and a silicone brush, combined with a cross-shaped concave-convex structure transmission and double bearing support, achieving thorough cleaning and stable transmission. It is suitable for preventing clogging of sewage pumps in municipal and industrial scenarios, improving operating efficiency and stability.

Description

Technical Field

[0001] This utility model relates to the field of sewage pump technology, and in particular to a self-cleaning device for sewage pumps. Background Technology

[0002] Sewage pumps are crucial equipment in municipal engineering, industrial production, and wastewater treatment for transporting liquids containing solid particles and fibrous impurities. Their operational efficiency and stability are of paramount importance. Since wastewater often contains large amounts of silt, fibers, plastic fragments, and other impurities, these impurities easily accumulate on the surface of the filter device installed at the inlet of the sewage pump, leading to decreased filtration efficiency and even internal wear or blockage of the pump body, severely affecting the normal operation and service life of the sewage pump.

[0003] Early solutions to filter clogging relied primarily on manual, periodic cleaning. This method required significant manpower and resources, and frequent shutdowns during cleaning severely disrupted the continuous operation of the sewage system, drastically reducing overall efficiency. With technological advancements, various automatic anti-clogging devices emerged. Among these, motor-driven scraper solutions were widely used. However, these solutions require additional motors, complex transmission mechanisms, and corresponding control components. This not only increases manufacturing costs but also makes the motors highly susceptible to failure due to water ingress and corrosion in the long-term sewage environment, leading to the malfunction of the entire anti-clogging device and ultimately increasing maintenance costs and the risk of failure.

[0004] Therefore, existing technologies for solving the problem of clogging in sewage pump filters still face challenges such as low cleaning efficiency, high maintenance costs, and insufficient system reliability, making it difficult to meet the demands of modern sewage systems for high efficiency, stability, and low maintenance. To address these issues, existing technologies urgently need improvement. Utility Model Content

[0005] This utility model discloses a self-cleaning device for sewage pumps, which aims to solve the technical problems of sewage pump filter devices being prone to clogging, having low cleaning efficiency, high maintenance costs, and being highly dependent on external power sources.

[0006] The technical solution of this utility model is as follows:

[0007] This utility model discloses a self-cleaning device for a sewage pump, comprising: a conical filter screen installed at the inlet of the sewage pump; a hydraulic impeller rotatably disposed on the inlet side of the conical filter screen, the hydraulic impeller rotating under the impact of fluid; and a V-shaped scraper that contacts the outer surface of the conical filter screen and is drivenly connected to the hydraulic impeller to clean the conical filter screen when the hydraulic impeller rotates.

[0008] This technical solution utilizes the rotation of a hydraulic impeller under fluid impact to drive a V-shaped scraper to clean the conical filter screen, achieving a self-cleaning function without the need for an external power source. This effectively solves the problems of high cost and high failure rate caused by relying on motor drive in existing technologies, and improves the operating efficiency and stability of the sewage pump.

[0009] Furthermore, the self-cleaning device for the sewage pump also includes a filter cover that covers the outside of the conical filter screen, and the hydraulic impeller is disposed between the filter cover and the conical filter screen.

[0010] This technical solution allows the filter cover to perform preliminary filtration of wastewater, providing additional protection for the conical filter screen. At the same time, it better guides the water flow to impact the hydraulic impeller, improving the impeller's rotation efficiency and resulting in better cleaning performance.

[0011] Preferably, the V-shaped scraper is provided with a brush and a silicone brush, which are attached to the outer surface of the conical filter.

[0012] This technical solution can more effectively remove different types of impurities from the surface of the conical filter, improving the thoroughness and efficiency of cleaning.

[0013] More specifically, in some embodiments, the hydraulic impeller has a cross-shaped protrusion on the side facing the conical filter screen, and the V-shaped scraper has a cross-shaped groove at the apex that mates with the cross-shaped protrusion, with the cross-shaped protrusion and the cross-shaped groove fitting together.

[0014] This technical solution ensures that the rotation of the hydraulic impeller can be stably and effectively transmitted to the V-shaped scraper, improving transmission efficiency and device reliability.

[0015] Preferably, the small end of the conical filter screen is provided with a second rotary bearing, and the apex of the V-shaped scraper is fitted onto the second rotary bearing.

[0016] This technical solution, through the installation of the second rotary bearing, provides stable support and reduces friction for the rotation of the V-shaped scraper, ensuring smooth scraper rotation.

[0017] Furthermore, a rotary bearing is provided at the center of the filter cover, and a rotating shaft is provided at one end of the hydraulic impeller near the filter cover, which is rotatably connected to the rotary bearing.

[0018] This technical solution, through the cooperation of the rotating bearing and the shaft, provides reliable support for the stable rotation of the hydraulic impeller, reducing shaking and wear during operation.

[0019] Preferably, the edge of the filter cover is provided with a first connecting ear, and the large end edge of the conical filter screen is provided with a second connecting ear. The first connecting ear and the second connecting ear are fixed to the inlet of the sewage pump by bolts.

[0020] This technical solution uses bolts to fix the first and second connecting lugs together, providing a simple, robust, and easy-to-install and disassemble connection method. This facilitates the maintenance and replacement of the device and improves its practicality.

[0021] More specifically, in some embodiments, the V-shaped scraper includes two scraper arms, with the brush and the silicone brush respectively disposed on the two scraper arms.

[0022] This technical solution uses a V-shaped scraper with a brush and a silicone brush on each of its two scraper arms, which further improves the cleaning efficiency of the conical filter.

[0023] Preferably, the surface of the filter cover has multiple filter cover water inlet holes.

[0024] This technical solution involves opening multiple water inlet holes on the surface of the filter cover, which increases the flow rate and uniformity of water entering the device, ensuring that the hydraulic impeller receives sufficient water flow impact, thereby improving its rotation efficiency and cleaning effect.

[0025] Furthermore, a gap is provided between the edge of the blades of the hydraulic impeller and the inner wall of the filter cover.

[0026] This technical solution, through the gap design between the edge of the hydraulic impeller blades and the inner wall of the filter cover, effectively avoids friction between the blades and the cover wall, ensuring the free rotation of the hydraulic impeller.

[0027] This application involves installing a conical filter screen at the inlet of a sewage pump, with a rotatable hydraulic impeller mounted on the inlet side. The impeller rotates under the impact of water flow, thereby driving a V-shaped scraper in contact with the filter screen to rotate and clean it. Its advantages include: utilizing water flow energy to drive the process, eliminating reliance on motors and complex components, reducing costs, avoiding motor malfunctions in sewage environments, improving reliability, and reducing maintenance costs; achieving continuous automatic cleaning of the conical filter screen, solving the efficiency reduction and clogging problems caused by impurity accumulation in traditional filtration devices, eliminating the need for manual cleaning, and improving the efficiency of the sewage system; the device has a compact structure, simple principle, is easy to install and maintain, extends the life of the sewage pump, and meets the needs of modern sewage systems. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0029] Figure 1This is a schematic diagram of a sewage pump with a self-cleaning and anti-clogging device.

[0030] Figure 2 This is a schematic cross-sectional view of a sewage pump with a self-cleaning anti-clogging device.

[0031] Figure 3 This is a structural breakdown diagram of a sewage pump with a self-cleaning anti-clogging device.

[0032] Figure 4 This is a schematic diagram of the filter cover structure.

[0033] Figure 5 Schematic diagram of impeller and V-shaped scraper structure

[0034] Figure 6 This is a schematic diagram of a cone-shaped filter.

[0035] Attached icon numbers:

[0036] 100. Sewage pump; 110. Water inlet; 111. Bolt; 200. Self-cleaning device; 210. Filter cover; 211. First connecting lug; 212. First through hole; 213. Water inlet hole of filter cover; 213. First rotary bearing; 220. Hydraulic impeller; 221. Blade; 222. Cross-shaped protrusion structure; 223. Rotating shaft; 230. Conical filter screen; 231. Second connecting lug; 232. Second through hole; 233. Water inlet hole of conical filter screen; 234. Second rotary bearing; 240. V-shaped scraper; 241. Cross-shaped groove; 242. Scraper arm; 243. Silicone brush; 244. Hair brush. Detailed Implementation

[0037] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0038] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] The technical solution proposed in this application is to install a self-cleaning device 200 at the inlet 110 of the sewage pump 100 to filter and continuously clean sewage before it enters the pump body. Specifically, see... Figures 1 to 3 The self-cleaning device 200 includes a conical filter 230, a hydraulic impeller 220, and a V-shaped scraper 240.

[0040] The conical filter screen 230 is designed with a conical structure, with its larger end installed at the inlet 110 of the sewage pump, and its smaller end facing away from the pump body. The surface of the conical filter screen 230 has many filter holes to block solid particles and fibrous impurities in the sewage.

[0041] The hydraulic impeller 220 is rotatably mounted on the inlet side of the conical filter screen 230, i.e., located before the wastewater enters the conical filter screen 230. The blades 221 of the hydraulic impeller 220 are designed to effectively capture the kinetic energy of the water flow. When wastewater flows through the hydraulic impeller 220, its blades 221 are impacted by the fluid and rotate. This design allows the hydraulic impeller 220 to be driven entirely by the energy of the fluid itself, without the need for an additional electrical or mechanical power source. As a preferred embodiment, the hydraulic impeller 220 can employ a multi-blade structure to maximize its utilization efficiency of the water flow impact.

[0042] The V-shaped scraper 240 contacts the outer surface of the conical filter screen 230. The V-shaped scraper 240 is connected to the hydraulic impeller 220 via a transmission mechanism, allowing the rotation of the hydraulic impeller 220 to synchronously drive the rotation of the V-shaped scraper 240. When the hydraulic impeller 220 rotates due to fluid impact, the V-shaped scraper 240 rotates accordingly and scrapes along the outer surface of the conical filter screen 230, thus continuously cleaning the conical filter screen 230. This transmission connection can be a direct mechanical connection. For example, the hydraulic impeller 220 can have a protruding structure at its center, and the apex of the V-shaped scraper 240 can have a groove that mates with this protruding structure; the two achieve transmission through interlocking.

[0043] The self-cleaning device proposed in this embodiment cleverly achieves automatic cleaning without an external power source by utilizing the rotation of the hydraulic impeller 220 due to fluid impact. As a result, the V-shaped scraper 240 continuously scrapes and cleans the conical filter screen 230, effectively preventing impurities from accumulating on the screen surface. This design not only reduces the manufacturing cost and operating energy consumption of the equipment, but more importantly, because it does not rely on easily damaged components such as motors, it greatly improves the reliability and stability of the device in harsh wastewater environments, significantly reducing maintenance needs and the risk of failure.

[0044] This application further proposes that the self-cleaning device for the sewage pump also includes a filter cover 210, such as Figure 4As shown.

[0045] The filter hood 210 is a structural component used to cover or enclose the conical filter screen 230. Its main function is to provide a controlled flow path for the fluid, isolate larger impurities, and provide physical protection for the internal hydraulic impeller 220. The filter hood 210 covers the outside of the conical filter screen 230, enclosing it from the outside. The hydraulic impeller 220 is positioned between the filter hood 210 and the conical filter screen 230, that is, the hydraulic impeller 220 is located within the channel defined by the inner wall of the filter hood 210 and the outer wall of the conical filter screen 230. This configuration ensures that the fluid must pass through the area where the hydraulic impeller 220 is located before entering the conical filter screen 230.

[0046] The above technical solution effectively isolates larger impurities in wastewater, providing physical protection for the hydraulic impeller 220 and the conical filter screen 230, preventing them from being directly exposed to large particles or accidental impacts from the external environment. This significantly extends the service life of the device and maintains its continuous and stable cleaning performance. Furthermore, the filter cover 210 allows the fluid to impact the blades of the hydraulic impeller 220 more concentratedly and effectively, improving the rotational efficiency of the hydraulic impeller 220.

[0047] In practical applications, relying solely on the scraping action of the V-shaped scraper 240 may be insufficient to thoroughly remove various types of dirt adhering to the surface of the conical filter 230. Therefore, this application further proposes an optimization scheme for the V-shaped scraper 240 to enhance its cleaning ability.

[0048] Specifically, such as Figure 5 As shown, the V-shaped scraper 240 is equipped with a brush 244 and a silicone brush, which are attached to the outer surface of the conical filter screen 230. The brush 244 is typically made of a fibrous material with a certain degree of hardness and elasticity, and its function is to effectively remove tangled debris such as fibers and hair, as well as larger particles of dirt, adhering to the surface of the conical filter screen 230 through a brushing action. The silicone brush 243 is typically made of a soft and wear-resistant silicone material, which allows it to better conform to the fine pores of the conical filter screen 230, effectively removing fine particles, sticky sludge, or biofilm that are difficult to remove with a hard scraper through a flexible scraping and squeezing action.

[0049] The above technical solution effectively avoids the problem of local clogging or incomplete cleaning of the filter screen due to long-term use, ensuring that the conical filter screen 230 always maintains good filtration performance, thereby ensuring the stable and efficient operation of the sewage pump.

[0050] This application further proposes, such as Figure 3 and Figure 5As shown, a cross-shaped protrusion 222 is provided on the side of the hydraulic impeller 220 facing the conical filter screen 230, and a cross-shaped groove 241 that cooperates with the cross-shaped protrusion 222 is opened at the apex of the V-shaped scraper 240. The cross-shaped protrusion 222 and the cross-shaped groove 241 are fitted and connected.

[0051] The cross-shaped protrusion 222 refers to a cross-shaped protrusion on the end face of the hydraulic impeller 220. This protrusion can be integrally formed with the hydraulic impeller 220, or it can be processed separately and then fixed to the hydraulic impeller 220. The cross-shaped groove 241 refers to a groove at the apex of the V-shaped scraper 240 that matches the cross-shaped protrusion 222. The shape and size of this groove should be adapted to the cross-shaped protrusion 222 to ensure a tight fit. Specifically, when the hydraulic impeller 220 rotates, the cross-shaped protrusion 222 drives the cross-shaped groove 241 to rotate, thereby driving the V-shaped scraper 240 to scrape the outer surface of the conical filter screen 230, achieving the cleaning function.

[0052] The above technical solution can effectively ensure a stable connection between the hydraulic impeller 220 and the V-shaped scraper 240, avoiding the problem of reduced cleaning effect due to unstable connection, thereby improving the overall performance and reliability of the self-cleaning device for sewage pumps.

[0053] like Figure 6 As shown, this application further proposes that a second rotary bearing 234 be provided at the center of the small end of the conical filter screen 230, and the vertex position of the V-shaped scraper 240 be sleeved on the second rotary bearing 234.

[0054] The second rotary bearing 234 refers to a mechanical component capable of withstanding axial and radial loads while allowing relative rotation between components. Specifically, the second rotary bearing 234 can be a ball bearing, roller bearing, or sliding bearing, etc., and its function is to support the V-shaped scraper 240 and enable it to rotate smoothly around the central axis of the conical filter screen 230. The apex position of the V-shaped scraper 240 refers to the intersection point of the two scraper arms 242 of the V-shaped scraper 240. By fitting the apex position of the V-shaped scraper 240 onto the second rotary bearing 234, the rotation of the V-shaped scraper is facilitated, improving the durability and cleaning efficiency of the device.

[0055] In the above embodiments of this application, if the hydraulic impeller 220 is only connected to the V-shaped scraper drive and fixed circumferentially, but its axial displacement is not restricted, the rotation of the hydraulic impeller 220 may not be smooth enough. To address this, this application further proposes that a rotary bearing be provided at the center of the filter cover 210, and a rotating shaft 223 be provided at the end of the hydraulic impeller 220 near the filter cover 210, with the rotating shaft 223 rotatably connected to the rotary bearing.

[0056] The rotary bearing can employ mature bearing technologies such as ball bearings. Its function is to provide a low-friction rotary support that facilitates rotation, ensuring the smooth and stable rotation of the hydraulic impeller 220, while also limiting the axial position of the hydraulic impeller 220. The rotating shaft 223 is a shaft-like structure extending from the hydraulic impeller 220, used to connect with the rotary bearing and transmit the rotational motion of the hydraulic impeller 220.

[0057] The above technical solutions can effectively improve the smoothness and reliability of the hydraulic impeller 220 rotation, thereby extending the service life of the self-cleaning device and ensuring the stable operation of the sewage pump.

[0058] This application further proposes, such as Figure 4 and Figure 6 As shown, connecting lugs are provided on the filter cover 210 and the conical filter screen 230 respectively, and are fixed by bolts 111, thereby improving the stability of the connection and the ease of installation.

[0059] Specifically, the first connecting lug 211 and the second connecting lug 231 are protruding structures respectively disposed on the edges of the filter cover 210 and the conical filter screen 230, and have bolt holes for the bolt 111 to pass through and be fixed. The bolt 111 can be any suitable fastener, such as a combination of screws, nuts, and bolts, used to fasten the first connecting lug 211 and the second connecting lug 231 together. As a preferred embodiment, the number of the first connecting lug 211 and the second connecting lug 231 can be adjusted according to actual needs, for example, multiple connecting lugs can be provided to improve the stability of the connection.

[0060] The above technical solutions can effectively improve the connection stability and installation convenience between the self-cleaning device and the sewage pump, ensure the stable operation of the self-cleaning device, and reduce maintenance costs.

[0061] This application further optimizes the structure of the V-shaped scraper 240. Specifically, the V-shaped scraper 240 includes two scraper arms 242, and a brush 244 and a silicone brush 243 are respectively disposed on the two scraper arms 242.

[0062] The scraper arm 242 refers to the two branch structures of the V-shaped scraper 240. Each scraper arm 242 contacts the outer surface of the conical filter 230 and is used to remove impurities attached to the conical filter 230. The brush 244 and the silicone brush 243 are two different cleaning elements. The brush 244 is usually made of softer fibers and is suitable for removing fine particles and dirt attached to the surface of the conical filter 230. The silicone brush 243 has a certain degree of elasticity and wear resistance and can effectively scrape off more firmly attached impurities and dirt.

[0063] Through the above technical solution, a brush 244 and a silicone brush 243 are respectively installed on the two scraper arms 242 of the V-shaped scraper 240. The brush 244 can remove fine particles and dirt, while the silicone brush 243 can scrape off firmly attached impurities and dirt. The two work together to more thoroughly remove various impurities from the surface of the conical filter screen 230, avoid affecting the normal operation of the sewage pump due to the accumulation of impurities, and thus improve the service life and working efficiency of the sewage pump.

[0064] Based on the above-described embodiments of this application, in order to ensure the water suction efficiency of the sewage pump and further improve the filtration effect, a plurality of filter cover water inlet holes 213 are opened on the surface of the filter cover 210.

[0065] The filter cover inlet hole 213 refers to the hole formed on the surface of the filter cover 210. Its function is to allow fluid to enter the interior of the filter cover 210 and flow through the hydraulic impeller 220, thereby driving the hydraulic impeller 220 to rotate. The number, shape, and size of the filter cover inlet holes 213 can be adjusted according to actual needs.

[0066] Through the above technical solution, while filtering out larger impurities in the sewage, the fluid can enter the filter cover 210 more smoothly, thereby ensuring that the hydraulic impeller 220 can obtain sufficient power and ensuring the normal operation of the sewage pump.

[0067] Based on the above-described embodiments of this application, a further improvement is proposed, wherein a gap is provided between the edge of the blade 221 of the hydraulic impeller 220 and the inner wall of the filter cover 210. The size of the gap between the edge of the blade 221 of the hydraulic impeller 220 and the inner wall of the filter cover 210 can be adjusted according to the size of the impurities and the dimensions of the hydraulic impeller 220 in the actual application scenario.

[0068] By creating a gap between the edge of the blades 221 of the hydraulic impeller 220 and the inner wall of the filter cover, sufficient flow space is provided for the water flow to impact the blades 221, preventing direct contact between the blades 221 and the inner wall of the filter cover 210, thus avoiding friction or collision. Simultaneously, it ensures that when wastewater flows through the blade area, the water flow smoothly impacts the blades along a predetermined path, effectively preventing blade rotation obstruction due to impurities, thereby ensuring that the hydraulic impeller 220 always maintains a stable and efficient rotational state.

[0069] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A self-cleaning device for a sewage pump, characterized in that, include: A conical filter screen (230) is installed at the inlet (110) of the sewage pump; A hydraulic impeller (220) is rotatably disposed on the inlet side of the conical filter screen (230), and the hydraulic impeller (220) rotates under the impact of fluid; and A V-shaped scraper (240) contacts the outer surface of the conical filter screen (230), and the V-shaped scraper (240) is connected to the hydraulic impeller (220) for cleaning the conical filter screen (230) when the hydraulic impeller (220) rotates.

2. The self-cleaning device for a sewage pump according to claim 1, characterized in that, It also includes a filter cover (210), which covers the outside of the conical filter screen (230), and the hydraulic impeller (220) is disposed between the filter cover (210) and the conical filter screen (230).

3. The self-cleaning device for a sewage pump according to claim 1, characterized in that, The V-shaped scraper (240) is equipped with a brush (244) and a silicone brush (243), and the brush (244) and the silicone brush are attached to the outer surface of the conical filter (230).

4. The self-cleaning device for a sewage pump according to claim 1, characterized in that, The hydraulic impeller (220) has a cross-shaped protrusion (222) on the side facing the conical filter (230), and the V-shaped scraper (240) has a cross-shaped groove (241) at the apex position that cooperates with the cross-shaped protrusion. The cross-shaped protrusion (222) and the cross-shaped groove (241) are fitted together.

5. The self-cleaning device for a sewage pump according to claim 1, characterized in that, The conical filter (230) has a second rotary bearing (234) at its small end center, and the V-shaped scraper (240) is fitted onto the second rotary bearing (234).

6. The self-cleaning device for a sewage pump according to claim 2, characterized in that, A rotary bearing is provided at the center of the filter cover (210), and a rotating shaft (223) is provided at one end of the hydraulic impeller (220) near the filter cover (210), and the rotating shaft (223) is rotatably connected to the rotary bearing.

7. The self-cleaning device for a sewage pump according to claim 2, characterized in that, The filter cover (210) has a first connecting ear (211) on its edge, and the tapered filter screen (230) has a second connecting ear (231) on its large end edge. The first connecting ear (211) and the second connecting ear (231) are fixed to the inlet (110) of the sewage pump by bolts (111).

8. The self-cleaning device for a sewage pump according to claim 3, characterized in that, The V-shaped scraper (240) includes two scraper arms (242), and the brush (244) and the silicone brush (243) are respectively disposed on the two scraper arms (242).

9. The self-cleaning device for a sewage pump according to claim 2, characterized in that, The surface of the filter cover (210) is provided with a plurality of filter cover water inlet holes (213).

10. The self-cleaning device for a sewage pump according to claim 2, characterized in that, A gap is provided between the edge of the blade (221) of the hydraulic impeller (220) and the inner wall of the filter cover (210).

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