A semi-open anti-clogging sewage treatment pump

Abstract

A semi-open anti-clogging sewage treatment pump includes a pump body, a guide ring, an impeller, a pump cover, and a suspension assembly. The pump cover is installed on the front end face of the suspension assembly. A rotating shaft is provided inside the suspension assembly. One end of the rotating shaft extends from the front end face of the suspension assembly and passes through the pump cover to connect to the impeller. The other end of the rotating shaft extends from the rear end face of the suspension assembly and is used to connect to a drive assembly. The rotating shaft drives the impeller to rotate. Sewage enters from the inlet, flows through the pump body cavity, and is discharged from the outlet. By setting a guide groove on the side wall of the guide cavity, and extending from the side connected to the inlet to the side connected to the outlet, when there are many particulate impurities in the sewage, the particulate impurities can be smoothly discharged along the guide groove, preventing them from getting stuck in the gap between the guide ring and the impeller and causing blockage. This achieves the effect of efficiently guiding impurities and reducing accumulation, while ensuring hydraulic efficiency and operational stability.

Description

Technical Field

[0001] This utility model belongs to the field of sewage treatment pump technology, specifically relating to a semi-open anti-clogging sewage treatment pump. Background Technology

[0002] As the core power equipment in sewage transportation systems, sewage treatment pumps directly determine the continuity and economy of the sewage treatment process through their operational stability, efficiency, and anti-clogging performance. However, sewage commonly contains a large amount of solid impurities, such as fibers, hair, flocculent matter, and silt particles, which easily cause clogging of sewage treatment pumps. This has become one of the core pain points restricting the application efficiency of sewage treatment pumps.

[0003] To alleviate clogging problems, some improvements have been proposed in existing technologies, such as adding a bar screen filter at the pump inlet or using an impeller structure with a cutting function. However, bar screen filters require regular manual cleaning; otherwise, clogging of the screen pores can lead to insufficient water flow, increasing maintenance workload and labor costs. Impellers with cutting functions typically rely on the sharp edges of the blades to cut impurities. After long-term use, the blade edges are prone to wear and dulling, significantly reducing the cutting effect. Moreover, the cutting efficiency is limited for hard mud and sand particles or highly fibrous impurities, making it difficult to fundamentally solve the clogging problem.

[0004] Therefore, in view of the technical shortcomings of existing sewage treatment pumps, such as easy clogging, high operation and maintenance costs, and difficulty in balancing efficiency and anti-clogging performance, developing a sewage treatment pump that can efficiently remove impurities and reduce accumulation while ensuring hydraulic efficiency and operational stability has become an urgent technical problem to be solved in the current sewage treatment equipment field. Utility Model Content

[0005] The purpose of this invention is to provide a semi-open anti-clogging sewage treatment pump.

[0006] The technical solution provided by this utility model is as follows: A semi-open anti-clogging sewage treatment pump includes a pump body, a guide ring, an impeller, a pump cover, and a suspension assembly. The pump cover is mounted on the front end face of the suspension assembly. A rotating shaft is provided within the suspension assembly. One end of the rotating shaft extends from the front end face of the suspension assembly and passes through the pump cover to connect to the impeller. The other end of the rotating shaft extends from the rear end face of the suspension assembly and is used to connect to a drive assembly. The pump body has an internal cavity with an open rear end face. The rear end face of the pump body is connected to the pump cover to close the internal cavity. The front end face of the pump body has an inwardly extending... The pump body has an inlet that connects to the internal cavity of the pump body, and an outlet that extends inward to connect to the internal cavity of the pump body on its outer side. The guide ring and the impeller are both installed inside the internal cavity of the pump body. The guide ring is fixedly connected to the pump body, and the guide ring has a guide cavity for fitting the impeller. The front end face of the impeller enters the guide cavity for movable fitting. The side wall of the guide cavity has a guide groove that extends from the inlet side to the outlet side. The direction of the guide groove from the inlet to the outlet is the direction of impeller rotation during sewage discharge.

[0007] In this invention, the side wall of the pump body cavity is provided with an adjusting ring groove, the outer wall of the guide ring is provided with a positioning flange adapted to the adjusting ring groove, the adjusting ring groove is provided with an adjusting shim, the front end face of the positioning flange abuts against the adjusting shim, and the gap between the guide ring and the impeller is adjusted based on the adjusting shims of different thicknesses configured in the adjusting ring groove.

[0008] In this invention, the front end face of the flow guide ring is provided with an inwardly recessed positioning groove, and the side wall of the pump body cavity is provided with a positioning protrusion that matches the positioning groove. The flow guide ring and the pump body are installed and positioned by the matching of the positioning groove and the positioning protrusion.

[0009] In this utility model, the rear end of the flow guide ring is provided with an outwardly protruding annular convex edge, and the annular convex edge is provided with a plurality of countersunk holes. The side wall of the pump body cavity is provided with threaded holes corresponding to the countersunk holes. The countersunk holes and the threaded holes are connected by a connector, and the flow guide ring is fixedly installed in the pump body cavity.

[0010] In this utility model, the rear end face of the impeller is provided with an inwardly extending shaft hole, the front end face of the impeller is provided with an inwardly extending connecting hole that communicates with the shaft hole, the front end face of the rotating shaft is provided with an inwardly extending rotating shaft threaded hole, the front end of the rotating shaft extends into the shaft hole, and the impeller and the rotating shaft are connected and fixed to the rotating shaft threaded hole through the connecting hole based on the connecting member.

[0011] In this invention, the rear end face of the pump body is sealed to the pump cover by a sealing ring.

[0012] In this utility model, the outer side wall of the rotating shaft is provided with a bushing, the bushing is sealed and fixed to the rotating shaft, the inner side wall of the pump cover is adapted to the outer side wall of the bushing, the outer side wall of the bushing is provided with a mechanical seal assembly, the rear end of the pump cover is connected to a mechanical seal cover, and the mechanical seal assembly is installed in the sealed space formed by the outer side wall of the bushing, the inner side wall of the pump cover and the inner side wall of the mechanical seal cover.

[0013] In this invention, the outer wall of the bushing is provided with a limiting ring that protrudes outwards. The front end of the mechanical seal assembly is limited by pressing against the end face of the limiting ring with a mechanical seal gasket. The rear end of the mechanical seal assembly is limited by pressing against the mechanical seal cover.

[0014] In this invention, the suspension assembly includes a suspension, a front bearing cap, and a rear bearing cap. The suspension includes a suspension body and an outer extension. One end of the outer extension is integrally formed with the front end of the suspension body, and the other end of the outer extension is connected to a pump cover. The front end of the suspension body is connected to the rotating shaft via a cylindrical roller bearing. The front bearing cap is connected to the front end face of the suspension body to limit the movement of the cylindrical roller bearing. The front bearing cap and the rotating shaft are sealed together by a skeleton oil seal. The rear end of the suspension body is connected to the rotating shaft via a deep groove ball bearing. The rear bearing cap is connected to the rear end face of the suspension body to limit the movement of the deep groove ball bearing. The rear bearing cap and the rotating shaft are also sealed together by a skeleton oil seal.

[0015] The beneficial effects of this utility model are as follows: When the sewage treatment pump of this utility model is working, the impeller is driven to rotate by the rotating shaft. Sewage enters from the inlet, flows through the pump body cavity, and is discharged from the outlet. By setting a guide groove on the side wall of the guide cavity, and the guide groove extends from the side connected to the inlet to the side connected to the outlet, when there are many particulate impurities in the sewage, the particulate impurities can be smoothly discharged along the guide groove, preventing them from getting stuck in the gap between the guide ring and the impeller and causing blockage. This achieves the effect of efficiently guiding impurities and reducing accumulation, while ensuring hydraulic efficiency and operational stability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal structure of the sewage treatment pump in this embodiment; Figure 2 This is a schematic diagram of the internal structure of the pump body in this embodiment; Figure 3 This is a perspective view of the rear end of the guide ring in this embodiment; Figure 4 This is a perspective view of the front end of the guide ring in this embodiment; Figure 5 This is a schematic diagram of the internal structure of the impeller in this embodiment; Figure 6 for Figure 1Enlarged view of section A; Figure 7 This is a schematic diagram of the internal structure connecting the suspension assembly and the rotating shaft in this embodiment. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0018] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc., then the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0019] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0020] See Figures 1 to 7This utility model provides a semi-open anti-clogging sewage treatment pump, including a pump body 1, a guide ring 2, an impeller 3, a pump cover 4, and a suspension assembly 5. The pump cover 4 is installed on the front end face of the suspension assembly 5. A rotating shaft 6 is provided inside the suspension assembly 5. One end of the rotating shaft 6 extends from the front end face of the suspension assembly 5 and passes through the pump cover 4 to connect to the impeller 3. The other end of the rotating shaft 6 extends from the rear end face of the suspension assembly 5 and is used to connect to a drive assembly. The pump body 1 has a pump body cavity 11 with an opening at the rear end face. The rear end face of the pump body 1 is connected to the pump cover 4 to close the pump body cavity 11. The front end face of the pump body 1 has an inwardly extending connection to the pump. The pump body 1 has an inlet 12 in its internal cavity 11. The outer side of the pump body 1 has an outlet 13 that extends inward and connects to the internal cavity 11. The guide ring 2 and the impeller 3 are both installed inside the internal cavity 11 of the pump body. The guide ring 2 is fixedly connected to the pump body 1. The guide ring 2 has a guide cavity 21 for fitting the impeller 3. The front end face of the impeller 3 enters the guide cavity 21 for movable fitting. The side wall of the guide cavity 21 has a guide groove 22 that extends from the side connected to the inlet 12 to the side connected to the outlet 13. The extension direction of the guide groove 22 from the inlet 12 to the outlet 13 is the rotation direction of the impeller 3 during sewage discharge. In this embodiment, the sewage treatment pump rotates by rotating shaft 6 to drive impeller 3 to rotate. Sewage enters from inlet 12, flows through pump body cavity 11, and is discharged from outlet 13. By setting guide groove 22 on the side wall of guide cavity 21, when there are many particulate impurities in the sewage, the particulate impurities can be smoothly discharged along guide groove 22, preventing them from getting stuck in the gap between guide ring 2 and impeller 3 and causing blockage. This achieves the effect of efficiently guiding impurities and reducing accumulation, while ensuring hydraulic efficiency and operational stability.

[0021] In practical use, wastewater treatment pumps often require adjustment of the gap between the guide ring 2 and the impeller 3 to accommodate the size of particulate impurities in the treated wastewater. When the particulate impurities in the wastewater are generally large, the guide ring 2 needs to be replaced to increase the gap between the guide ring 2 and the impeller 3; when the particulate impurities in the wastewater are generally small, the guide ring 2 needs to be replaced to decrease the gap between the guide ring 2 and the impeller 3. This adjustment method of replacing the guide ring 2 requires the configuration of guide rings 2 of various specifications. Furthermore, since the gap adjustment range is often small, the requirements for manufacturing guide rings 2 of different specifications are also high, which is inconvenient for the manufacturing and production of parts, and the replacement cost is also high. Therefore, current wastewater treatment pumps often only use one specification of guide ring 2, resulting in increased wear on the guide ring 2 and impeller 3 during operation and a short service life. Therefore, in this embodiment, the side wall of the pump body cavity 11 is provided with an adjusting ring groove 14, and the outer wall of the guide ring 2 is provided with a positioning flange 23 adapted to the adjusting ring groove 14. An adjusting shim 7 is provided inside the adjusting ring groove 14, and the front end face of the positioning flange 23 abuts against the adjusting shim 7. The gap between the guide ring 2 and the impeller 3 at the fitting point is adjusted based on the different thicknesses of the adjusting shims 7 configured in the adjusting ring groove 14. When a thicker adjusting shim 7 is configured in the adjusting ring groove 14, the guide ring 2 is closer to the impeller 3, and the gap between the guide ring 2 and the impeller 3 at the fitting point is smaller; when a thinner adjusting shim 7 is configured in the adjusting ring groove 14, the guide ring 2 is farther from the impeller 3, and the gap between the guide ring 2 and the impeller 3 at the fitting point is larger. In this embodiment, only different adjusting shims 7 need to be replaced to adjust the gap size between the guide ring 2 and the impeller 3, reducing adjustment costs and improving adjustment convenience.

[0022] In a preferred embodiment, the front end face of the guide ring 2 is provided with an inwardly recessed positioning groove 24, and the side wall of the pump body cavity 11 is provided with a positioning protrusion adapted to the positioning groove 24; the rear end of the guide ring 2 is provided with an outwardly protruding annular convex edge 25, the annular convex edge 25 is provided with a plurality of countersunk holes 26, and the side wall of the pump body cavity 11 is provided with threaded holes corresponding to the countersunk holes 26. When installing the guide ring 2, it is first installed and positioned by adapting the positioning groove 24 to the positioning protrusion, and then the countersunk holes 26 and the threaded holes are connected by a connector to fix the guide ring 2 in the pump body cavity 11.

[0023] Specifically, the rear end face of the impeller 3 is provided with an inwardly extending shaft hole 31, the front end face of the impeller 3 is provided with an inwardly extending connecting hole 32 that communicates with the shaft hole 31, the front end face of the rotating shaft 6 is provided with an inwardly extending rotating shaft threaded hole, the front end of the rotating shaft 6 extends into the shaft hole 31, and the impeller 3 and the rotating shaft 6 are connected and fixed to the rotating shaft threaded hole through the connecting hole 32 based on the connecting member.

[0024] Specifically, the rear end face of the pump body 1 is sealed to the pump cover 4 by a sealing ring 8. A bushing 9 is provided on the outer wall of the rotating shaft 6, and the bushing 9 is sealed and fixed to the rotating shaft 6, rotating with the rotating shaft 6. The inner wall of the pump cover 4 is adapted to the outer wall of the bushing 9, and a mechanical seal assembly 10 is provided on the outer wall of the bushing 9. A mechanical seal cover 20 is connected to the rear end of the pump cover 4. The mechanical seal assembly 10 is installed within the sealed space formed by the outer wall of the bushing 9, the inner wall of the pump cover 4, and the inner wall of the mechanical seal cover 20. The moving ring of the mechanical seal assembly 10 is connected to the bushing 9, thereby achieving a seal between the outer wall of the bushing 9 and the inner wall of the pump cover 4. A limiting ring 91 protrudes outward from the outer wall of the bushing 9. The front end of the mechanical seal assembly 10 is pressed against the end face of the limiting ring 91 by a mechanical seal gasket 30 to achieve front-end limiting, and the rear end of the mechanical seal assembly 10 is pressed against the mechanical seal cover 20 to achieve rear-end limiting.

[0025] Specifically, the suspension assembly 5 includes a suspension 51, a front bearing cap 52, and a rear bearing cap 53. The suspension 51 includes a suspension body 511 and an outer extension 512. One end of the outer extension 512 is integrally formed with the front end of the suspension body 511, and the other end of the outer extension 512 is connected to the pump cover 4. The front end of the suspension body 511 is connected to the rotating shaft 6 via a cylindrical roller bearing 54. The front bearing cap 52 is connected to the front end face of the suspension body 511 and limits the cylindrical roller bearing 54. The front bearing cap 52 and the rotating shaft 6 are sealed together by a skeleton oil seal 55. The rear end of the suspension body 511 is connected to the rotating shaft 6 via a deep groove ball bearing 56. The rear bearing cap 53 is connected to the rear end face of the suspension body 511 and limits the deep groove ball bearing 56. The rear bearing cap 53 and the rotating shaft 6 are also sealed together by a skeleton oil seal 55. The skeleton oil seal 55 can be made of nitrile rubber or fluororubber.

[0026] The above description is only a preferred embodiment of the present utility model. Any technical solution that achieves the purpose of the present utility model by essentially the same means shall fall within the protection scope of the present utility model.

Claims

1. A semi-open anti-clogging sewage treatment pump, characterized in that: The system includes a pump body (1), a guide ring (2), an impeller (3), a pump cover (4), and a suspension assembly (5). The pump cover (4) is mounted on the front end face of the suspension assembly (5). The suspension assembly (5) has a rotating shaft (6) inside. One end of the rotating shaft (6) extends from the front end face of the suspension assembly (5) and passes through the pump cover (4) to connect to the impeller (3). The other end of the rotating shaft (6) extends from the rear end face of the suspension assembly (5) and is used to connect to the drive assembly. The pump body (1) has a pump body cavity (11) with an opening at the rear end face. The rear end face of the pump body (1) is connected to the pump cover (4) to close the pump body cavity (11). The front end face of the pump body (1) has an inlet (1) extending inward to communicate with the pump body cavity (11). 2) The outer side of the pump body (1) is provided with an outlet (13) that extends inward to connect with the inner cavity (11) of the pump body. The guide ring (2) and the impeller (3) are both installed in the inner cavity (11) of the pump body. The guide ring (2) is fixedly connected to the pump body (1). The guide ring (2) is provided with a guide cavity (21) for matching with the impeller (3). The front end face of the impeller (3) enters the guide cavity (21) for dynamic matching. The side wall of the guide cavity (21) is provided with a guide groove (22) that extends from the side of the inlet (12) to the side of the outlet (13). The extension direction of the guide groove (22) from the inlet (12) to the outlet (13) is the rotation direction of the impeller (3) when the sewage is discharged.

2. The semi-open anti-clogging sewage treatment pump according to claim 1, characterized in that: The side wall of the pump body cavity (11) is provided with an adjustment ring groove (14), the outer wall of the guide ring (2) is provided with a positioning flange (23) that is adapted to the adjustment ring groove (14), the adjustment ring groove (14) is provided with an adjustment shim (7), the front end face of the positioning flange (23) abuts against the adjustment shim (7), and the gap between the guide ring (2) and the impeller (3) is adjusted based on the adjustment shims (7) of different thicknesses configured in the adjustment ring groove (14).

3. A semi-open anti-clogging sewage treatment pump according to claim 1, characterized in that: The front end face of the guide ring (2) is provided with an inwardly recessed positioning groove (24), and the side wall of the pump body cavity (11) is provided with a positioning protrusion that matches the positioning groove (24). The guide ring (2) and the pump body (1) are installed and positioned by matching the positioning groove (24) with the positioning protrusion.

4. A semi-open anti-clogging sewage treatment pump according to claim 1, characterized in that: The rear end of the flow guide ring (2) is provided with an annular protrusion (25) that protrudes outward. The annular protrusion (25) is provided with a plurality of countersunk holes (26). The side wall of the pump body cavity (11) is provided with threaded holes corresponding to the countersunk holes (26). Based on the connection of the connector, the countersunk holes (26) and the threaded holes are connected, and the flow guide ring (2) is fixedly installed in the pump body cavity (11).

5. A semi-open anti-clogging sewage treatment pump according to claim 1, characterized in that: The impeller (3) has an inwardly extending shaft hole (31) on its rear end face, and a connecting hole (32) that extends inwardly and connects to the shaft hole (31) on its front end face. The rotating shaft (6) has an inwardly extending rotating shaft threaded hole on its front end face. The front end of the rotating shaft (6) extends into the shaft hole (31). The impeller (3) and the rotating shaft (6) are connected to the rotating shaft threaded hole through the connecting hole (32) based on the connecting member.

6. A semi-open anti-clogging sewage treatment pump according to claim 1, characterized in that: The rear end face of the pump body (1) is sealed to the pump cover (4) by a sealing ring (8).

7. A semi-open anti-clogging sewage treatment pump according to claim 1, characterized in that: The outer wall of the rotating shaft (6) is provided with a bushing (9), which is sealed and fixed to the rotating shaft (6). The inner wall of the pump cover (4) is adapted to the outer wall of the bushing (9). The outer wall of the bushing (9) is provided with a mechanical seal assembly (10). The rear end of the pump cover (4) is connected to an organic seal cover (20). The mechanical seal assembly (10) is installed in the sealed space formed by the outer wall of the bushing (9), the inner wall of the pump cover (4), and the inner wall of the mechanical seal cover (20).

8. A semi-open anti-clogging sewage treatment pump according to claim 7, characterized in that: The outer side wall of the bushing (9) is provided with a limiting ring (91) protruding outward. The front end of the mechanical seal assembly (10) is pressed against the end face of the limiting ring (91) by the mechanical seal gasket (30) to achieve front end limiting. The rear end of the mechanical seal assembly (10) is pressed against the mechanical seal cover (20) to achieve rear end limiting.

9. A semi-open anti-clogging sewage treatment pump according to claim 1, characterized in that: The suspension assembly (5) includes a suspension (51), a front bearing cap (52), and a rear bearing cap (53). The suspension (51) includes a suspension body (511) and an outer extension (512). One end of the outer extension (512) is integrally formed with the front end of the suspension body (511), and the other end of the outer extension (512) is connected to the pump cover (4). The front end of the suspension body (511) is connected to the rotating shaft (6) via a cylindrical roller bearing (54), and the front bearing cap (52) is connected to the suspension body (511). The front end face of the suspension body (511) limits the cylindrical roller bearing (54); the front bearing cover (52) and the rotating shaft (6) are sealed and connected by a skeleton oil seal (55); the rear end of the suspension body (511) is connected to the rotating shaft (6) by a deep groove ball bearing (56); the rear bearing cover (53) is connected to the rear end face of the suspension body (511) and limits the deep groove ball bearing (56); the rear bearing cover (53) and the rotating shaft (6) are also sealed by a skeleton oil seal (55).

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