Anti-blocking submersible sewage pump

Abstract

The application discloses a kind of anti-blocking submersible sewage pumps, it is related to the technical field of sewage pump, including pump body, and pump body is rotatably connected with impeller assembly;Impeller assembly includes impeller frame, inner impeller and several outer cutter, and filter cover is provided in pump body, and the solid foreign matter with larger volume in sewage is blocked using the filter hole on filter cover, to prevent it from entering pump body or pipeline and causing blockage, and then the large-volume sludge and solid particles blocked on the inner wall of filter cover are cut using the rotating outer cutter, and they are made to pass through filter hole again after being cut into smaller pieces;Meanwhile, the inner wall of filter cover can also be cleaned using the outer cutter, to prevent filter hole from being blocked, and realize self-cleaning effect.

Description

Technical Field

[0001] This application relates to the technical field of sewage pumps, and in particular to an anti-clogging submersible sewage pump. Background Technology

[0002] A submersible sewage pump is a pump used to discharge sewage or wastewater. It is typically installed in pools, sewage treatment plants, sewers, or other locations where wastewater needs to be discharged. Submersible sewage pumps achieve efficient wastewater discharge by drawing sewage into the pump body and then pushing it to the designated discharge point.

[0003] To ensure long-term effective operation, existing submersible sewage pumps typically employ anti-clogging designs. For example, filters such as screens are installed at the bottom inlet of the pump to capture sludge or large impurities, preventing them from entering the pump body and pipes and causing blockages. Alternatively, blades are installed on the impeller; as the impeller rotates and draws in water, the blades cut sludge or solid particles in the sewage into smaller fragments, making it easier for them to pass through the pump body and pipes.

[0004] Regarding the aforementioned technologies, the inventors believe the following drawbacks exist: filters are only suitable for scenarios with relatively good water quality; otherwise, frequent filter replacement and cleaning are necessary. Furthermore, the anti-clogging effect of blade cutting is poor; in practical applications, solid particles and other impurities often fail to contact the blades and are instead propelled into the pump body and pipes by the impeller and blades. Both aspects require improvement. Summary of the Invention

[0005] To address the shortcomings of the two aforementioned anti-clogging designs, this application provides an anti-clogging submersible sewage pump.

[0006] The anti-clogging submersible sewage pump provided in this application adopts the following technical solution: A submersible sewage pump includes a pump body and a submersible motor. The pump body has an inlet at its bottom and an outlet on its side wall. An impeller assembly is rotatably connected inside the pump body. The impeller assembly includes an impeller frame, an inner impeller mounted on the impeller frame, and several outer cutter wheels. The inner impeller faces the inlet below, and the outer cutter wheels are arranged in a ring around the inner impeller. The upper end of the impeller frame is connected to the output shaft of the submersible motor. When the impeller frame rotates, it drives the inner impeller and the outer cutter wheels to rotate synchronously. A filter cover is provided inside the pump body, which encloses the impeller assembly in a ring. The filter cover has filter holes and separates the chamber between the inlet and the outlet. The outer cutter wheels are in close contact with the inner wall of the filter cover when rotating.

[0007] By adopting the above technical solution, the filter holes on the filter cover are used to block large solid foreign objects in the sewage, preventing them from entering the pump body or pipeline and causing blockage. Then, the rotating outer cutter wheel is used to cut the large sludge and solid particles blocked on the inner wall of the filter cover into smaller fragments and allow them to pass through the filter holes. At the same time, the outer cutter wheel can also be used to clean the inner wall of the filter cover, preventing the filter holes from clogging and achieving a self-cleaning effect.

[0008] Optionally, the outer cutter wheel is helical, and its upper and lower ends are respectively rotatably connected to the impeller frame around the helical axis.

[0009] By adopting the above technical solution, the spiral blades can clean the inner wall of the filter cover in a vertical direction when rotating, thus increasing the cleaning area.

[0010] Optionally, a toothed ring is provided at the upper end of the filter cover, and a rotating gear that meshes with the toothed ring is provided at the upper end of the outer cutter wheel along the axis; when the impeller frame rotates and drives the outer cutter wheel to rotate, the outer cutter wheel spirals upward.

[0011] By adopting the above technical solution, when the outer cutter wheel rotates around the inner impeller, the toothed ring drives the self-transmission gear to rotate the outer cutter wheel, thereby achieving a more effective cutting effect on the sludge or solid foreign objects on the inner wall of the filter cover; and when the outer cutter wheel rotates, the spiral structure can generate an upward thrust on the liquid, thereby increasing the pumping capacity of the impeller assembly.

[0012] Optionally, the outer edge of the outer blade wheel is provided with a serrated blade.

[0013] By adopting the above technical solutions, a more powerful cutting effect can be achieved.

[0014] Optionally, the filter cover has a small diameter at the top and bottom ends and a large diameter in the middle, and the outer blade wheel is spindle-shaped with narrow top and bottom ends and a wide middle.

[0015] By adopting the above technical solution, sludge or solid foreign objects in the sewage can adhere to the inner wall of the filter cover and concentrate in the middle section of the filter cover, which is convenient for cutting and processing, and can reduce the accumulation of sludge and foreign objects in the dead corners at the top and bottom.

[0016] Optionally, the outer cutter wheel is inclined toward the rotation direction of the impeller frame.

[0017] By adopting the above technical solution, the rotation of the outer cutter wheel can generate an outward thrust in the same direction as the rotation of the outer cutter wheel around the inner impeller, thereby further enhancing the pumping capacity of the impeller assembly.

[0018] Optionally, the cutting edges of adjacent outer cutting wheels are staggered.

[0019] By adopting the above technical solution, the gap between the blades of adjacent outer cutter wheels is reduced, thereby achieving an effective cutting effect on sludge and foreign objects passing between two adjacent outer cutter wheels.

[0020] Optionally, the pump body is detachably provided with a base at its bottom, the liquid inlet is located at the center of the base, and the filter cover is provided on the base.

[0021] By adopting the above technical solution, it is easy to remove the base and filter cover, thereby facilitating the cleaning and replacement of the filter cover.

[0022] Optionally, the upper end of the impeller frame is provided with a sealing edge extending outward, and the upper end of the filter cover is provided with a sealing groove for the sealing edge to be inserted and rotated; the filter cover includes a spliced ​​left cover and a right cover.

[0023] By adopting the above technical solution, the sealing edge and sealing groove are fitted together to prevent sludge and foreign objects from accumulating in the gap between the filter cover and the impeller frame, thus avoiding obstruction of the impeller frame's rotation.

[0024] Optionally, the bottom of the filter cover is provided with a downwardly extending positioning block, and the base is provided with a positioning hole for the positioning block to pass through downward.

[0025] By adopting the above technical solution, the filter cover is restricted by the cooperation of the positioning block and the positioning hole, so that it does not rotate with the impeller frame.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The filter covers use filter holes to block large solid foreign objects in the sewage, preventing them from entering the pump or pipes and causing blockages. Then, the rotating outer blades cut the large sludge and solid particles blocked on the inner wall of the filter covers into smaller fragments, allowing them to pass through the filter holes. At the same time, the outer blades can also be used to clean the inner wall of the filter covers, preventing the filter holes from clogging and achieving a self-cleaning effect. 2. When the outer cutter wheel rotates around the inner impeller, the toothed ring drives the self-transmission gear to rotate the outer cutter wheel, thereby achieving a more effective cutting effect on the sludge or solid foreign objects on the inner wall of the filter cover; and when the outer cutter wheel rotates, the spiral structure can generate upward and outward thrust on the liquid, thereby increasing the pumping capacity of the impeller assembly. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0028] Figure 2 This is an exploded structural diagram of an embodiment of this application.

[0029] Figure 3This is a cross-sectional schematic diagram used in this application embodiment to illustrate the internal structure of the pump body.

[0030] Figure 4 This is a partial exploded view of the filter cover and impeller assembly in an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures: 1. Pump body; 11. Inlet; 12. Outlet; 2. Submersible motor; 21. Output shaft; 3. Impeller assembly; 31. Impeller frame; 311. Sealing edge; 32. Inner impeller; 33. Outer cutter wheel; 331. Rotating shaft; 332. Blade; 333. Rotating gear; 4. Filter cover; 41. Left cover; 42. Right cover; 43. Filter hole; 44. Sealing groove; 45. Toothed ring; 46. Positioning block; 5. Base; 51. Positioning hole; 52. Bolt. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0033] This application discloses an anti-clogging submersible sewage pump. (Refer to...) Figure 1 The submersible sewage pump includes a pump body 1 and a submersible motor 2. A chamber is formed inside the pump body 1. The submersible motor 2 is installed on the upper end of the pump body 1. A base 5 is detachably fixed to the bottom of the pump body 1 by bolts. An inlet 11 is opened in the middle of the base 5. An outlet 12 with an upward opening is formed on one side of the pump body 1.

[0034] Reference Figure 2 , Figure 3 An impeller assembly 3 is rotatably connected inside the pump body 1. The impeller assembly 3 includes an impeller frame 31, an inner impeller 32, and several outer cutter wheels 33. The upper end of the impeller frame 31 is fixedly connected to the output shaft 21 of the submersible motor 2. The inner impeller 32 is fixedly connected to the center of the impeller frame 31 along the axis of the output shaft 21, directly facing the liquid inlet 11 below. In this embodiment, nine outer cutter wheels 33 are provided. The nine outer cutter wheels 33 are evenly distributed in a ring around the inner impeller 32. When the impeller frame 31 rotates under the drive of the submersible motor 2, it will drive the inner impeller 32 and the outer cutter wheels 33 to rotate synchronously.

[0035] Reference Figure 2 , Figure 3The outer cutter wheel 33 includes a rotating shaft 331 and a blade 332. The upper and lower ends of the rotating shaft 331 are hinged to the impeller frame 31, and the rotating shaft 331 is inclined towards the rotation direction of the impeller frame 31 at an angle between 30 and 45 degrees. The blade 332 is helically fixed to the outside of the rotating shaft 331 along its axis, with the cutting edge facing outwards. The helical shape of the blade 332 is spindle-shaped, narrow at both ends and wide in the middle. In other embodiments, serrated cutting edges can also be provided on the outer edge of the outer cutter wheel 33. The cutting edges of adjacent outer cutter wheels 33 are staggered, which can effectively reduce the gap between the cutting edges of adjacent outer cutter wheels 33, thereby achieving an effective cutting effect on sludge and foreign objects passing between two adjacent outer cutter wheels 33.

[0036] Reference Figure 2 , Figure 4 A filter cover 4 is also fixedly installed inside the pump body 1. The bottom of the filter cover 4 is connected to the base 5, and the top end is connected to the impeller frame 31. It is composed of a spliced ​​left cover 41 and a right cover 42, which can surround the impeller assembly 3 in a ring and separate the chamber between the liquid inlet 11 and the liquid outlet 12. A large number of filter holes 43 are evenly opened on the filter cover 4. The filter cover 4 has a small diameter at the top and bottom ends and a large diameter in the middle. It matches the shape of the blade 332 of the outer cutter wheel 33. When the outer cutter wheel 33 rotates, the blade of the blade 332 will be in close contact with the inner wall of the filter cover 4 to form a cutting and cleaning effect.

[0037] Reference Figure 3 , Figure 4 The upper end of the impeller frame 31 is integrally formed with a sealing edge 311 extending outward. The upper end of the filter cover 4 is provided with a sealing groove 44 for the sealing edge 311 to be inserted and rotated. By using the insertion and cooperation of the sealing edge 311 and the sealing groove 44, sludge and foreign objects are prevented from accumulating in the gap between the filter cover 4 and the impeller frame 31, thus preventing the impeller frame 31 from rotating.

[0038] Reference Figure 3 , Figure 4 The upper end of the filter cover 4 is integrally formed with a toothed ring 45, and the upper end of the outer cutter wheel 33 is fixedly connected with a self-rotating gear 333 that meshes with the toothed ring 45 along the axis, so that the outer cutter wheel 33 can rotate on its own while rotating around the inner impeller 32 under the drive of the impeller frame 31.

[0039] Reference Figure 1 , Figure 2 The bottom of the filter cover 4 is welded with several downwardly extending positioning blocks 46, and the base 5 is provided with positioning holes 51 for the positioning blocks 46 to pass through downwards. The positioning blocks 46 and the positioning holes 51 are used to restrict the filter cover 4 so that it does not rotate with the impeller frame 31.

[0040] The implementation principle of an anti-clogging submersible sewage pump according to an embodiment of this application is as follows: When the submersible sewage pump is in use, the filter holes 43 on the filter cover 4 block larger solid foreign objects in the sewage, preventing them from entering the pump body 1 or pipes and causing blockages. The rotating outer cutter wheel 33 can cut large sludge and solid particles blocked on the inner wall of the filter cover 4 into smaller fragments so that they can pass through the filter holes 43. At the same time, the outer cutter wheel 33 can also clean the inner wall of the filter cover 4, preventing the filter holes 43 from clogging and achieving a self-cleaning effect. Furthermore, when the outer cutter wheel 33 rotates around the inner impeller 32, the toothed ring 45 drives the self-transmission gear to rotate the outer cutter wheel 33, thereby achieving a more effective cutting effect on the sludge or solid foreign objects on the inner wall of the filter cover 4. Moreover, when the outer cutter wheel 33 rotates, the spiral structure can generate upward and outward thrust on the liquid, thereby increasing the pumping capacity of the impeller assembly 3.

[0041] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A clog-resistant submersible sewage pump, comprising a pump body (1) and a submersible motor (2), wherein the pump body (1) has an inlet (11) at its bottom and an outlet (12) on its side wall; an impeller assembly (3) is rotatably connected inside the pump body (1); characterized in that: The impeller assembly (3) includes an impeller frame (31), an inner impeller (32) mounted on the impeller frame (31), and several outer cutter wheels (33). The inner impeller (32) faces the lower liquid inlet (11), and the several outer cutter wheels (33) are arranged in a ring around the inner impeller (32). The upper end of the impeller frame (31) is connected to the output shaft (21) of the submersible motor (2). When the impeller frame (31) rotates, it drives the inner impeller (32) and the outer cutter wheels (33) to rotate synchronously. A filter cover (4) is provided inside the pump body (1) to surround the impeller assembly (3) in a ring. The filter cover (4) is provided with filter holes (43). The filter cover (4) separates the chamber between the inlet (11) and the outlet (12); the outer cutter wheel (33) is in close contact with the inner wall of the filter cover (4) when it rotates; the outer cutter wheel (33) is spiral, and the upper and lower ends of the outer cutter wheel (33) are respectively connected to the impeller frame (31) around the spiral axis; a toothed ring (45) is provided at the upper end of the filter cover (4), and a self-rotating gear (333) that meshes with the toothed ring (45) is provided at the upper end of the outer cutter wheel (33) along the axis; when the impeller frame (31) rotates and drives the outer cutter wheel (33) to rotate, the outer cutter wheel (33) spirals upward.

2. The anti-clogging submersible sewage pump according to claim 1, characterized in that: The outer cutter wheel (33) is inclined toward the rotation direction of the impeller frame (31).

3. The anti-clogging submersible sewage pump according to claim 1, characterized in that: The cutting edges of adjacent outer cutting wheels (33) are staggered.

4. The anti-clogging submersible sewage pump according to claim 1, characterized in that: The outer edge of the outer blade wheel (33) is provided with a serrated blade.

5. A clog-resistant submersible sewage pump according to claim 1, characterized in that: The filter cover (4) has a small diameter at the top and bottom ends and a large diameter in the middle, and the outer blade wheel (33) is spindle-shaped with a narrow top and bottom ends and a wide middle.

6. The anti-clogging submersible sewage pump according to claim 1, characterized in that: The pump body (1) is detachably provided with a base (5) at the bottom, the liquid inlet (11) is located at the center of the base (5), and the filter cover (4) is provided on the base (5).

7. A clog-resistant submersible sewage pump according to claim 6, characterized in that: The impeller frame (31) has a sealing edge (311) extending outward at the upper end, and the filter cover (4) has a sealing groove (44) at the upper end for the sealing edge (311) to be inserted and rotated; the filter cover (4) includes a spliced ​​left cover (41) and a right cover (42).

8. A clog-resistant submersible sewage pump according to claim 6, characterized in that: The bottom of the filter cover (4) is provided with a downwardly extending positioning block (46), and the base (5) is provided with a positioning hole (51) through which the positioning block (46) passes downward.

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