Sewage lifting pump
By setting a diversion groove and inner ribs on the outer surface of the suction cover of the sewage lift pump, the problem of sediment particles aggregation and large foreign matter interference is solved, and the efficient operation and normal use of the lift pump is achieved.
Patent Information
- Application Number
- CN202421579279.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-07-05
AI Technical Summary
During the use of the existing sewage lift pump, the silt particles gather in the gap between the impeller and the suction cover, resulting in a decrease in operation efficiency and large pieces of foreign matter interfere with the rotation of the impeller and affect the normal use of the pump.
A flow guide groove is arranged on the outer surface of the suction cover, and the flow guide groove penetrates to the outside of the suction cover in a direction away from the through hole, forming a swirl to drive the sediment and sand particles to settle and discharge. A ribbed plate is arranged in the suction cover to block large pieces of foreign matter, combining the arc groove and the concave arc surface structure to reduce friction and resistance.
Effectively avoid the accumulation of silt particles in the gap between the impeller and the suction cover, improve operation efficiency, reduce the probability of large pieces of foreign matter entering the flow chamber, and ensure the normal use and operation efficiency of the pump.
Smart Images
Figure CN223120176U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pump equipment, in particular to a sewage lift pump. Background Art
[0002] As an auxiliary sewage discharge device, the sewage lift pump is used to lift the sewage in areas such as basements and sewage wells, which are far from the drainage riser or do not have the ability of self-flow sewage discharge, to a certain height and then discharge it into the urban drainage pipeline.
[0003] For the existing sewage lift pump, to ensure sufficient head and flow output, the gap between the impeller and the suction cover is preferably maintained at about 0.5 mm. With the use of the sewage lift pump, the sediment particles in the sewage will accumulate and rub against the end faces of the impeller and the suction cover, resulting in an increase in the gap, thereby affecting the operating efficiency of the lift pump. At the same time, large foreign objects in the sewage will interfere with the rotation of the impeller and affect the normal use of the pump. Summary of the Utility Model
[0004] To solve the above deficiencies of the existing technology, the utility model provides a sewage lift pump, which can timely discharge the sediment particles in the gap between the impeller and the suction cover and reduce the intake of large foreign objects, thereby ensuring the operating efficiency and use effect.
[0005] The technical solution of the utility model is as follows: a sewage lift pump, including a pump body, the bottom of the pump body has a liquid suction port and a flow chamber communicated with the liquid suction port, the outside of the pump body has a liquid outlet communicated with the flow chamber, a impeller is rotatably connected in the flow chamber, a suction cover which is in clearance fit with the end face of the impeller is fixed in the liquid suction port, and a through hole is provided in the middle of the suction cover. A plurality of guide grooves are arranged on the outer surface of the suction cover along the circumferential direction, and the guide grooves penetrate to the outside of the suction cover along the direction away from the through hole. By arranging the guide grooves on the outer surface of the suction cover, the sediment particles in the inhaled sewage can settle in the guide grooves and be discharged into the flow chamber along the water flow of the guide grooves driven by the swirl formed in the flow chamber, and then discharged from the liquid outlet, so as to avoid aggregation in the gap between the impeller and the suction cover. At the same time, the notch of the guide groove can also generate a certain crushing force on the sediment particles to prevent large particle sediment from jamming the impeller.
[0006] The guide groove is an arc groove, and the bending direction of the guide groove is the same as the rotation direction of the impeller. The guide groove is bent in the same direction as the rotation direction of the impeller, which can make the sewage form a swirling force in the same direction as the swirl in the groove, and improve the flow efficiency of the sediment particles transported from the guide groove to the flow chamber.
[0007] Both sides of the bottom of the arc groove have arc transition sections. The arc transition sections can ensure that the sediment particles flow more smoothly and avoid aggregation at the bottom of the groove.
[0008] A number of rib plates are provided on the inner surface of the suction hood along the circumferential direction, and one end of each rib plate extends to the through hole. The rib plates at the bottom of the suction hood can form a lateral block for large foreign matters in the disc, thereby reducing the probability of large foreign matters being sucked into the flow transfer chamber through the through hole and ensuring the normal use of the lift pump.
[0009] The rib plates extend radially outward in an arc shape.
[0010] The inner surface of the suction hood has a concave arc surface structure, and the two sides of the through hole have convex curved surface structures that smoothly transition to the inner surface and the outer surface of the suction hood. The settings of the arc surface structure and the convex curved surface structure can ensure that the sewage smoothly transitions to the flow transfer chamber inside the suction hood, reducing the resistance when the sewage is introduced into the impeller.
[0011] The beneficial effects of the present utility model are as follows: By providing a diversion groove on the outer surface of the suction hood in this solution, the sediment particles in the sucked sewage can settle in the diversion groove, and under the drive of the swirl formed in the flow transfer chamber, they are discharged into the flow transfer chamber along the water flow of the diversion groove and then discharged from the liquid outlet, avoiding accumulation in the gap between the impeller and the suction hood. Furthermore, the operation efficiency of the pump body is ensured. At the same time, the notch of the diversion groove can also generate a certain crushing force on the sediment particles to prevent large particle sediment from jamming the impeller, and a rib plate for blocking large foreign matters is also provided inside the suction hood, thereby further ensuring the normal use of the lift pump. Description of the Drawings
[0012] Figure 1 is a structural schematic diagram of the present utility model;
[0013] Figure 2 is Figure 1 a partial enlarged view of A in
[0014] Figure 3 is a structural schematic diagram of the suction hood in the present utility model;
[0015] Figure 4 is a structural schematic diagram of the suction hood from another angle in the present utility model.
[0016] Reference numerals: 1, pump body; 101, liquid suction port; 102, liquid outlet; 103, flow transfer chamber; 2, impeller; 3, suction hood; 301, through hole; 302, diversion groove; 303, arc surface structure; 304, convex curved surface structure; 305, arc transition section; 4, rib plate. Detailed Embodiments
[0017] To enable those skilled in the art to better understand the technical solutions in the present utility model, the technical solutions in the present utility model will be clearly and completely described below with reference to the drawings. Other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present utility model.
[0018] In this application, the sewage lift pump includes a pump body 1 and a motor assembly integrally installed above the pump body 1. The installation structure of the motor assembly is the same as that of the prior art and will not be elaborated here.
[0019] As Figure 1 and Figure 2 shown, the present utility model provides a sewage lift pump. The bottom of the pump body 1 has a liquid suction port 101 and a flow chamber 103 communicating with the liquid suction port 101. The outside of the pump body 1 has a liquid outlet 102 communicating with the flow chamber 103. An impeller 2 connected to the drive shaft of the motor assembly is provided in the flow chamber 103. The impeller 2 rotates in the flow chamber 103 under the drive of the motor assembly, sucking sewage from the liquid suction port 101 and discharging it from the liquid outlet 102. A suction hood 3 with a clearance fit with the end face of the impeller 2 is fixed in the liquid suction port 101. In this embodiment, the suction hood 3 is reversely buckled and fixed on the outer shell of the pump body 1 inside the liquid suction port 101, and the middle of the suction hood 3 has a through hole 301. The hood structure of the suction hood 3 helps to block a part of the large foreign matters in advance. A plurality of guide grooves 302 are formed on the outer surface of the suction hood 3 along the circumferential direction. The guide grooves 302 penetrate to the outside of the suction hood 3 along the direction away from the through hole 301. The arrangement of the guide grooves 302 enables the sediment particles in the sucked sewage to settle in the guide grooves 302 and be discharged into the flow chamber 103 along the water flow of the guide grooves 302 under the drive of the swirl formed in the flow chamber 103, and then discharged from the liquid outlet 102, avoiding accumulation in the gap between the impeller 2 and the suction hood 3, thereby ensuring the operation efficiency of the pump body 1. At the same time, the notch of the guide groove 302 can also generate a certain crushing force on the sediment particles, effectively preventing the large particle sediment from jamming the impeller 2.
[0020] As Figure 3 shown, the guide groove 302 is an arc groove, and the bending direction of the guide groove 302 is the same as the rotation direction of the impeller 2. The guide groove 302 is bent in the same direction as the rotation direction of the impeller 2, which can enable the sewage to form a flow force in the same direction as the swirl in the groove, improving the flow efficiency of the sediment particles transported from the guide groove 302 to the flow chamber 103. Further preferably, in order to make the sediment particles flow more smoothly and avoid their accumulation at the bottom of the groove, both sides of the bottom of the arc groove have arc transition sections 305.
[0021] As Figure 4 shown, a plurality of rib plates 4 are provided on the inner surface of the suction hood 3 along the circumferential direction. One end of the rib plate 4 extends to the through hole 301. Further preferably, the rib plate 4 extends radially outward in an arc shape. By providing the rib plates 4, lateral blocking can be formed on the large foreign matters in the suction hood 3, thereby further reducing the probability of the large foreign matters being sucked into the flow chamber 103 through the through hole 301 and ensuring the normal use of the lift pump.
[0022] In order to reduce the resistance when sewage is introduced into the impeller 2 and enable it to smoothly transition from the inner side of the suction hood 3 to the flow chamber 103, the inner surface of the suction hood 3 has a concave arc surface structure 303, and both sides of the through hole 301 have convex curved surface structures 304 that smoothly transition to the inner and outer surfaces of the suction hood 3.
[0023] The suction hood 3 with the above structure is installed in the liquid suction port 101 of the sewage lift pump. The hood structure and the inner rib plate 4 of the suction hood 3 respectively form axial and lateral resistances to large foreign objects, thereby reducing the probability of them being introduced into the flow chamber 103 by the impeller 2 and ensuring the use effect of the pump body 1; with the cooperation of the impeller 2 and the diversion groove 302, the sediment in the sewage settles in the diversion groove 302 and is discharged by means of swirl flow, avoiding its accumulation in the gap between the impeller 2 and the suction hood 3 and wearing the impeller 2, thereby ensuring the operation efficiency of the pump body 1.
[0024] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims
1. Sewage lift pump, including a pump body, the bottom of the pump body has a liquid suction port and a flow chamber communicating with the liquid suction port, the outside of the pump body has a liquid outlet communicating with the flow chamber, a impeller is rotatably connected in the flow chamber, a suction hood which is in clearance fit with the end face of the impeller is fixed in the liquid suction port, and a through hole is provided in the middle of the suction hood, characterized in that, A plurality of flow guiding grooves are formed on the outer surface of the suction hood along the circumferential direction, and the flow guiding grooves penetrate through to the outside of the suction hood along the direction away from the through hole.
2. The sewage lift pump according to claim 1, wherein, The flow guiding grooves are arc-shaped grooves, and the bending direction of the flow guiding grooves is the same as the rotation direction of the impeller.
3. The sewage lift pump according to claim 2, characterized in that, Both sides of the groove bottom of the arc-shaped groove are provided with arc transition sections.
4. The sewage lift pump according to claim 1 or 2, characterized in that, A plurality of rib plates are arranged on the inner surface of the suction hood along the circumferential direction, and one end of each rib plate extends to the through hole.
5. The sewage lift pump according to claim 4, characterized in that, The rib plates extend radially outward in an arc shape.
6. The sewage lift pump according to claim 1 or 2, wherein The inner surface of the suction hood has an inwardly concave arc surface structure, and convex curved surface structures that smoothly transition to the inner surface and the outer surface of the suction hood are provided on both sides of the through hole.