Inlet water filtering piece of submersible electric pump

Abstract

The utility model provides a water inlet filtering piece of a submersible electric pump, and belongs to the technical field of pumps. The technical problem that a water inlet filtering piece of an existing submersible electric pump is low in water absorption efficiency is solved. According to the water inlet filtering piece of the submersible electric pump, the submersible electric pump comprises a motor shell and a pump shell which are fixedly connected with each other, the lower portion of the pump shell is fixedly connected with the water inlet filtering piece, the water inlet filtering piece comprises a water inlet ring part and a filtering ring part which are integrally formed, the filtering ring part is located on the inner side of the water inlet ring part and coaxially arranged, and a water inlet gap is formed between the filtering ring part and the water inlet ring part; the filtering ring part is fixedly connected with the upper end part of the water inlet ring part through a fixed connecting part, and a fixed seat is arranged at the lower end part of the water inlet ring part and is not in contact with the filtering ring part. The utility model has the advantage of improving the water absorption efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of pump technology, specifically referring to a water inlet filter for a submersible electric pump. Background Technology

[0002] Submersible electric pumps consist of three parts: a pump, a seal, and a motor. The pump is equipped with internal protective devices. The motor, located at the top of the pump, is a single-phase or three-phase asynchronous motor. The pump, with a centrifugal impeller and volute structure, is located below the motor. A double-end mechanical seal is used between the pump and the motor, and O-rings are used for static sealing at all fixed stops. Due to their small size and light weight, submersible electric pumps are particularly suitable for pumping water from wells in rural areas, irrigation and drainage in farmland, watering gardens, and domestic water supply. They can also be used for removing industrial wastewater, water supply and drainage in construction sites, and aquaculture.

[0003] A submersible pump, as described in prior art (application number 2024209572895), includes a casing and a pump body at the lower end of the casing. A base is installed at the lower end of the pump body. A motor is housed inside the casing, and turbine blades are installed inside the pump body. A water inlet is located at the lower center of the pump body. The base is hollow inside and has multiple openings on its outer wall. This opening design increases water flow resistance and reduces the submersible pump's suction efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an inlet filter for a submersible pump. The technical problem this invention aims to solve is how to optimize the inlet to improve water intake efficiency.

[0005] The objective of this utility model can be achieved through the following technical solution: a water inlet filter for a submersible electric pump, the submersible electric pump including a motor housing and a pump housing fixedly connected to each other, a water inlet filter fixedly connected to the bottom of the pump housing, the water inlet filter including an integrally formed water inlet ring and a filter ring, the filter ring being located inside the water inlet ring and coaxially arranged, a water inlet gap between the filter ring and the water inlet ring, the upper ends of the filter ring and the water inlet ring being fixedly connected by a fixed connection, the lower end of the water inlet ring having a fixing seat, the fixing seat not contacting the filter ring.

[0006] Furthermore, a plurality of circumferentially distributed water inlet blocks are formed between the fixed base and the fixed connection part. The water inlet blocks gradually widen from the outside to the inside, and a water inlet channel gradually narrows from the outside to the inside is formed between two adjacent water inlet blocks. The water inlet channel connects the water inlet gap. The outer circumferential diameter of the fixed base is larger than the outer circumferential diameter of the fixed connection part. The water inlet blocks also have an inclined surface that smoothly connects the fixed base and the fixed connection part.

[0007] Furthermore, the fixing base has a through hole, the diameter of which is larger than the outer circumferential diameter of the filter ring.

[0008] Furthermore, the filter ring is provided with several water inlet holes evenly distributed circumferentially.

[0009] Furthermore, the filter ring portion includes a vertically arranged straight section and a base plate portion, and the water inlet extends from the straight section to the base plate portion.

[0010] Furthermore, the water inlet hole is L-shaped.

[0011] Compared with existing technologies, the technical advantages of this utility model are as follows: 1. The gradually narrowing inlet channel with a wider outer width and a more narrow inner width, combined with the inclined surface, creates a Venturi effect, which accelerates water flow through narrow areas, reduces fluid resistance, and increases the inlet flow rate per unit time. The circumferentially distributed inlet blocks achieve 360° uniform water distribution, reducing eddy currents and making the pump load distribution more balanced. 2. The L-shaped combined inlet hole design effectively increases the filtration area compared to traditional vertical holes, forming a stepped filtration path and effectively improving water suction efficiency. 3. The one-piece molding process eliminates the leakage risk of traditional welded structures, increases overall strength, and the outward expansion design of the outer diameter of the fixed seat, which is larger than the outer diameter of the fixed connection part, forms a guide skirt, effectively collecting peripheral water flow and improving water suction efficiency. Attached Figure Description

[0012] Figure 1 This is the front view of the submersible electric pump of this utility model.

[0013] Figure 2 This utility model is a three-dimensional water inlet filter. Figure 1 .

[0014] Figure 3 This utility model is a three-dimensional water inlet filter. Figure 2 .

[0015] Figure 4 This is a bottom view of the water inlet filter element of this utility model.

[0016] Figure 5 This is a cross-sectional view of the water inlet filter element of this utility model.

[0017] Drawing number markings: 1. Motor housing; 2. Pump; 3. Inlet filter element; 31. Inlet ring; 32. Filter ring; 33. Inlet gap; 34. Fixed connection; 35. Fixed base; 36. Inlet block; 37. Inlet channel; 38. Inclined slope; 39. Through hole; 310. Inlet hole; 311. Straight passage; 312. Base plate. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] It should be noted that the descriptions of "up", "down", "left", "right", "top", "bottom", etc. in this utility model are defined based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] A water inlet filter 3 for a submersible pump 2 is disclosed. The submersible pump 2 includes a motor housing 1 and a pump housing 2, which are fixedly connected to each other by bolts. The water inlet filter 3 is fixedly connected to the bottom of the pump housing 2 by bolts. The water inlet filter 3 includes an integrally formed water inlet ring 31 and a filter ring 32, and a fixing connection 34 that fixes the upper ends of the water inlet ring 31 and the filter ring 32 together. The filter ring 32 is located inside the water inlet ring 31 and is coaxially arranged. There is a water inlet gap 33 between the filter ring 32 and the water inlet ring 31. The lower end of the water inlet ring 31 has a fixing seat 35, which does not contact the filter ring 32.

[0021] A plurality of circumferentially distributed water inlet blocks 36 are formed between the fixed base 35 and the fixed connecting part 34, forming a water inlet ring 31. The water inlet blocks 36 gradually widen from the outside in, and a water inlet channel 37 gradually narrows from the outside in between adjacent water inlet blocks 36. The water inlet channel 37 connects to the water inlet gap 33. The outer diameter of the fixed base 35 is larger than the outer diameter of the fixed connecting part 34. The water inlet blocks 36 also have a smoothly inclined surface 38 connecting the fixed base 35 and the fixed connecting part 34. The water inlet blocks 36 have an inclined shape on three sides. The fixed base 35 has a through hole 39, the diameter of which is larger than the outer diameter of the filter ring 32. The gradually narrowing water inlet channel 37, combined with the inclined surface 38, creates a Venturi effect, which accelerates water flow through narrow areas, reduces fluid resistance, and increases the water inlet flow rate per unit time. The circumferentially distributed inlet blocks 36 achieve 360° uniform water distribution, reducing eddy currents and making the load distribution of the pump body more balanced. The one-piece molding process eliminates the leakage risk of traditional welded structures and increases the overall strength. The outward expansion design of the outer diameter of the fixed seat 35, which is larger than the outer diameter of the fixed connection part 34, forms a flow guide skirt, effectively collecting the peripheral water flow and improving the water suction efficiency.

[0022] Except for the upper end of the filter ring 32 and the inlet ring 31, the rest of the filter ring 32 is not in contact with the inlet ring 31, meaning it is suspended. The inlet ring 31 has a plurality of inlet holes 310 evenly distributed around its circumference. The filter ring 32 includes a vertically arranged straight section 311 and a base plate 312, with the inlet holes 310 extending from the straight section 311 to the base plate 312. The inlet holes 310 are L-shaped. Compared to traditional vertical holes, the L-shaped combined inlet hole 310 design effectively increases the filtration area, forming a stepped filtration path and effectively improving water absorption efficiency.

[0023] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A water inlet filter for a submersible electric pump, the submersible electric pump (2) comprising a motor housing (1) and a pump (2) housing fixedly connected to each other, and a water inlet filter (3) fixedly connected to the bottom of the pump (2) housing, characterized in that: The water inlet filter element (3) includes an integrally formed water inlet ring (31) and a filter ring (32). The filter ring (32) is located inside the water inlet ring (31) and is coaxially arranged. There is a water inlet gap (33) between the filter ring (32) and the water inlet ring (31). The upper ends of the filter ring (32) and the water inlet ring (31) are fixedly connected by a fixed connection part (34). The lower end of the water inlet ring (31) has a fixing seat (35). The fixing seat (35) does not contact the filter ring (32).

2. The water inlet filter of the submersible electric pump according to claim 1, characterized in that: A plurality of circumferentially distributed water inlet blocks (36) are formed between the fixed base (35) and the fixed connection part (34). The water inlet blocks (36) gradually widen from the outside to the inside. A water inlet channel (37) gradually narrows from the outside to the inside is formed between two adjacent water inlet blocks (36). The water inlet channel (37) connects to the water inlet gap (33). The outer diameter of the fixed base (35) is larger than the outer diameter of the fixed connection part (34). The water inlet blocks (36) also have an inclined surface (38) that smoothly connects the fixed base (35) and the fixed connection part (34).

3. The water inlet filter of the submersible electric pump according to claim 2, characterized in that: The fixing base (35) has a through hole (39), the diameter of which is larger than the outer circumferential diameter of the filter ring portion (32).

4. The water inlet filter of the submersible pump according to claim 1 or 2 or 3, characterized in that: The filter ring (32) has several water inlet holes (310) evenly distributed in the circumferential direction.

5. The water inlet filter of the submersible electric pump according to claim 4, wherein: The filter ring portion (32) includes a vertically arranged straight passage portion (311) and a bottom plate portion (312), and the water inlet hole (310) extends from the straight passage portion (311) to the bottom plate portion (312).

6. The water inlet filter of the submersible pump according to claim 5, wherein: The water inlet (310) is L-shaped.

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