A large water output electric water pump

Abstract

The utility model relates to electric water pump technical field discloses a kind of electric water pumps of large water output, including shell, cavity is provided in shell, motor and impeller are provided in cavity, motor is connected with impeller and drives impeller rotation, hollow column is provided in cavity, motor is installed in hollow column, cavity is provided with inner wall, water passage is provided between hollow column and inner wall, water passage is annular, impeller is communicated with water passage, water inlet and drain outlet that water passage is communicated are provided on shell;When using, motor drives impeller rotation, to make external water from water inlet suction water passage, and flow through water passage from drain outlet discharge.The utility model structure is simple, and production cost is low;By being arranged in hollow column with motor, annular space formed using hollow column and inner wall as water passage, increase the cross-sectional area of circulation, effectively reduce water flow resistance, to improve the water discharge capacity and overall working efficiency of water pump.

Description

Technical Field

[0001] This utility model relates to the field of electric water pump technology, and more specifically, to an electric water pump with a large water output. Background Technology

[0002] Submersible electric water pumps, as efficient and convenient pumping devices, are widely used in agricultural irrigation, industrial drainage, construction, and domestic water supply. Their basic structure includes a casing and key components such as a motor and impeller housed within it. The casing typically contains a water passage with an inlet and an outlet. During operation, the motor drives the impeller to rotate, drawing water from the inlet into the water passage and ultimately discharging it through the outlet, thus achieving continuous pumping.

[0003] However, existing submersible electric water pumps still have certain limitations in their structural design. Specifically, the drain pipe is either a separate or integrated component within the casing, with the water passage typically located inside the drain pipe, which is positioned to the side of the motor. Due to limited space within the casing, and the need to accommodate the motor, impeller, and other necessary components, the inner diameter of the drain pipe is often strictly limited. While this design ensures the overall structural compactness, it also introduces significant technical problems: a smaller drain pipe inner diameter significantly increases water flow resistance, restricts the effective flow area of ​​the water passage, and thus reduces water flow efficiency. The direct consequence is that the pump's drainage capacity is constrained, making it difficult to meet high-flow-rate drainage demands, while also increasing energy consumption and reducing overall operating efficiency. Utility Model Content

[0004] To address at least one of the aforementioned problems, this utility model provides an electric water pump with a large water output, comprising a housing, an inner cavity within the housing, a motor and an impeller housed within the inner cavity, the motor connected to and driving the impeller to rotate, a hollow column within the inner cavity, the motor mounted within the hollow column, an inner wall within the inner cavity, and a water passage annular between the hollow column and the inner wall, the impeller communicating with the water passage, and an inlet and outlet on the housing communicating with the water passage; in use, the motor drives the impeller to rotate, causing external water to be drawn into the water passage through the inlet and discharged through the outlet; this utility model's electric water pump with a large water output has a simple structure and low production cost; by placing the motor within the hollow column and utilizing the annular space formed by the hollow column and the inner wall as the water passage, the flow cross-sectional area is increased, effectively reducing water flow resistance, thereby improving the pump's drainage capacity and overall working efficiency.

[0005] Optionally, the inner wall is an annular inner wall, the hollow column is an annular column, and the inner wall and the hollow column are coaxially or nearly coaxially arranged.

[0006] Optionally, the housing is provided with an installation groove communicating with the water inlet, the impeller is placed in the installation groove, and the housing is provided with a vortex guide port, which is connected between the installation groove and the water passage.

[0007] Optionally, the housing is provided with a mounting bracket, a first sealing ring is provided between the mounting bracket and the housing, the mounting bracket is provided with a flow guide channel, the flow guide channel is connected between the impeller and the water inlet, and the flow guide channel extends along the axial direction of the impeller.

[0008] Optionally, the hollow column is connected to a base plate, the motor is provided with a motor shaft for connecting to the impeller, the base plate is provided with a clearance hole for avoiding the motor shaft, the base plate is provided with a first annular protrusion, and a sealing plug for sealing the clearance hole is provided inside the first annular protrusion, the sealing plug being sleeved on the motor shaft.

[0009] Optionally, the motor is provided with a boss, the sealing plug is provided with a positioning groove corresponding to the boss, the sealing plug is provided with a through hole, the motor shaft passes through the through hole, the sealing plug is provided with a second annular protrusion and a third annular protrusion coaxial with the through hole, the second annular protrusion is placed in the clearance hole, the third annular protrusion abuts against the boss, and a pressure block abuts between the housing and the motor.

[0010] Optionally, the upper part of the water passage is provided with an inwardly inclined annular guide slope.

[0011] Optionally, the housing includes a first housing, a second housing, and a threaded sleeve that are separately configured, wherein the lower part of the first housing is threadedly connected to the upper part of the threaded sleeve, and the upper part of the second housing is threadedly connected to the lower part of the threaded sleeve.

[0012] Optionally, a guide post is provided annularly on the first housing, the guide post is coaxially arranged with the hollow column, the guide post is provided with an annular groove that engages with the upper part of the hollow column, and a second sealing ring is provided in the annular groove.

[0013] Optionally, a third housing is connected to the lower part of the second housing. The second housing is provided with a snap-fit ​​part, and the third housing is provided with a snap-fit ​​groove corresponding to the snap-fit ​​part. The water inlet is located at the bottom of the third housing, and a third sealing ring is provided between the third housing and the second housing.

[0014] Compared to existing technologies, the electric water pump of this invention, with its large water output, has a simple structure and low production cost. By placing the motor inside the hollow column and utilizing the annular space formed by the hollow column and the inner wall as a water passage, the cross-sectional area for flow is increased, effectively reducing water flow resistance and thus improving the pump's drainage capacity and overall working efficiency. The inner wall is annular, and the hollow column is annular, with the inner wall and the hollow column coaxial or nearly coaxial. This coaxial or nearly coaxial design makes the cross-section of the annular water passage formed between the inner wall and the hollow column more uniform and regular, allowing water to flow more smoothly and steadily, thereby effectively reducing hydraulic losses and improving the pump's water flow efficiency and overall drainage capacity. Attached Figure Description

[0015] Figure 1 This is a perspective view of the electric water pump with a large water output according to this utility model.

[0016] Figure 2 This is a schematic diagram of the bottom structure of the electric water pump with a large water output according to this utility model;

[0017] Figure 3 This is a cross-sectional view of the electric water pump with a large water output according to this utility model.

[0018] Figure 4 for Figure 3 Enlarged view of section A;

[0019] Figure 5 for Figure 3 Enlarged view of section B;

[0020] Figure 6 for Figure 3 Enlarged view of section C;

[0021] Figure 7 This is a schematic diagram of the vortex guide port of the electric water pump with large water output according to this utility model.

[0022] Figure 8 This is a schematic diagram of the impeller part of the electric water pump with large water output according to this utility model;

[0023] Figure 9 This is a schematic diagram of the structure of the sealing plug for the electric water pump with a large water output according to this utility model;

[0024] The component names corresponding to the various reference numerals in the figure are as follows: 1 for housing, 11 for first housing, 111 for guide post, 112 for annular groove, 12 for second housing, 121 for snap-fit ​​part, 13 for threaded sleeve, 14 for third housing, 141 for snap-fit ​​groove, 101 for inner cavity, 1011 for inner wall, 102 for hollow column, 1021 for base plate, 1022 for clearance hole, 1023 for first annular protrusion, 103 for water inlet, and 104 for drain. 105 is the water inlet, 106 is the vortex guide inlet, 2 is the motor, 201 is the motor shaft, 202 is the boss, 3 is the impeller, 4 is the water passage, 401 is the annular guide slope, 5 is the mounting bracket, 501 is the first sealing ring, 502 is the guide channel, 6 is the sealing plug, 600 is the positioning groove, 601 is the through hole, 602 is the second annular protrusion, 603 is the third annular protrusion, 7 is the pressure block, 8 is the second sealing ring, and 9 is the third sealing ring. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship when the product is in normal use.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0028] See Figures 1-9 This utility model provides an electric water pump with a large output water volume, including a housing 1, an inner cavity 101 inside the housing 1, a motor 2 and an impeller 3 inside the inner cavity 101, the motor 2 being connected to and driving the impeller 3 to rotate, a hollow column 102 inside the inner cavity 101, the motor 2 being installed inside the hollow column 102, an inner wall 1011 inside the inner cavity 101, a water passage 4 being provided between the hollow column 102 and the inner wall 1011, the water passage 4 being annular, the impeller 3 communicating with the water passage 4, and a series of other features on the housing 1. The water inlet 103 and outlet 104 are connected to the water passage 4. In use, the motor 2 drives the impeller 3 to rotate so that external water is drawn into the water passage 4 through the water inlet 103 and flows through the water passage 4 to be discharged from the outlet 104. The electric water pump of this utility model with large water output has a simple structure and low production cost. By setting the motor in the hollow column and using the annular space formed by the hollow column and the inner wall as the water passage, the flow cross-sectional area is increased, the water flow resistance is effectively reduced, thereby improving the water pump's drainage capacity and overall working efficiency.

[0029] See Figure 3 The inner wall 1011 is an annular inner wall, and the hollow column 102 is an annular column. The inner wall 1011 and the hollow column 102 are coaxial or nearly coaxial. The coaxial or nearly coaxial design makes the cross-section of the annular water passage 4 formed between the inner wall 1011 and the hollow column 102 more uniform and regular, so that the water flows more smoothly and steadily, thereby effectively reducing hydraulic loss and improving the water pump's water passage efficiency and overall drainage capacity.

[0030] See Figure 3 , Figure 4 , Figure 7 and Figure 8 The housing 1 is provided with an installation groove 105 that communicates with the inlet 103. The impeller 3 is placed in the installation groove 105. The housing 1 is provided with a vortex guide port 106, which connects the installation groove 105 and the water passage 4. The vortex guide port 106 connects the installation groove 105 and the water passage 4. Its core function is to guide the water flow to form a controllable vortex when the impeller 3 rotates. This orderly vortex can significantly improve the kinetic energy and efficiency of the water flow entering the water passage 4, effectively reduce the energy loss caused by disordered turbulence, and thus enhance the pump head and overall pumping efficiency. Specifically, the vortex guide port 106 can guide the water flow to form a spiral upward flow in the water passage 4. This flow pattern can reduce the turbulence of the water flow discharged from the impeller, allowing it to rotate and rise smoothly along the channel wall, significantly reducing turbulence and local energy loss. By converting the kinetic energy of the water flow more efficiently into pressure and velocity, the pump head, drainage efficiency and operational stability are improved.

[0031] See Figure 3 , Figure 4 and Figure 6 The housing 1 is provided with a mounting bracket 5, and a first sealing ring 501 is provided between the mounting bracket 5 and the housing 1 to prevent water leakage between the mounting bracket 5 and the housing 1, ensuring reliable use. The mounting bracket 5 is provided with a flow guide channel 502, which connects the impeller 3 and the inlet 103 and extends along the axial direction of the impeller 3. Through the axially extending flow guide channel 502, the water flow at the inlet 103 can be guided, so that it enters the impeller 3 smoothly and evenly along the axial direction of the impeller 3, reducing turbulence at the inlet and enabling the impeller to transfer energy to the water flow more efficiently, thereby improving the hydraulic efficiency and overall performance of the water pump.

[0032] See Figures 3-5The hollow column 102 is connected to a base plate 1021. The motor 2 is provided with a motor shaft 201 for connecting to the impeller 3. The base plate 1021 has a clearance hole 1022 for avoiding the motor shaft 201. The base plate 1021 is provided with a first annular protrusion 1023. A sealing plug 6 for sealing the clearance hole 1022 is provided inside the first annular protrusion 1023. The sealing plug 6 is sleeved on the motor shaft 201. The first annular protrusion 1023 positions and presses the sealing plug 6, so that the sealing plug 6 tightly wraps the motor shaft and effectively seals the clearance hole 1022. This reliably prevents water from the outside of the pump from seeping into the internal motor cavity through the clearance hole 1022, thereby ensuring the safe operation and service life of the motor. The motor 2 is provided with a boss 202, and the sealing plug 6 is provided with a positioning groove 600 corresponding to the boss 202. The sealing plug 6 has a through hole 601 through which the motor shaft 201 passes. The sealing plug 6 has a second annular protrusion 602 and a third annular protrusion 603 coaxial with the through hole 601. The second annular protrusion 602 is placed in the clearance hole 1022, and the third annular protrusion 603 abuts against the boss 202. A pressure block 7 abuts between the housing 1 and the motor 2, and the housing 1 presses and fixes the motor 2 by the pressure block 7. Radial positioning is achieved by the positioning groove 600 cooperating with the boss 202, so that the sealing plug 6 is not easy to move radially relative to the motor 2, the sealing plug 6 is installed firmly, and the sealing performance is stable. The second annular protrusion 602 and the third annular protrusion 603 can increase the contact area between the sealing plug 6 and the motor shaft 201, so as to suppress the shaking of the motor shaft 201, improve the shock absorption effect, and make the output of the motor shaft 201 more stable.

[0033] See Figure 3 The upper part of the water passage 4 is provided with an inwardly inclined annular guide surface 401. The annular guide surface 401 is provided at the upper part of the water passage 4, which can collect and guide the water flow that is about to be discharged. Through the inwardly inclined structure, the water flow cross section can be smoothly constricted, guiding the water flow to change direction more smoothly and accelerate discharge, effectively reducing turbulence and energy loss at the outlet, thereby improving the drainage efficiency and head performance of the water pump.

[0034] See Figures 1-3 The housing 1 includes a first housing 11, a second housing 12, and a threaded sleeve 13, which are separately configured. The lower part of the first housing 11 is threadedly connected to the upper part of the threaded sleeve 13, and the upper part of the second housing 12 is threadedly connected to the lower part of the threaded sleeve 13. Dividing the housing into three parts—the first housing, the second housing, and the threaded sleeve—reduces manufacturing costs. The housing is assembled using upper and lower threaded pairs, achieving modular assembly. This facilitates the assembly and maintenance of the internal motor, impeller, and sealing components. At the same time, this structure can apply the required preload by tightening the threads, ensuring a tight fit between the components and effectively improving the rigidity and sealing reliability of the overall structure.

[0035] See Figure 3 and Figure 5 A guide post 111 is annularly arranged on the first housing 11. The guide post 111 is coaxially arranged with the hollow column 102. The guide post 111 is provided with an annular groove 112 that engages with the upper part of the hollow column 102. A second sealing ring 8 is provided in the annular groove 112. By engaging the coaxially arranged guide post 111 with the hollow column 102 and combining with the second sealing ring 8 in the annular groove 112, precise alignment and reliable sealing between the first housing 11 and the key components of the internal water passage are achieved. This ensures the coaxiality and smoothness of the water passage and effectively prevents high-pressure water from leaking from this connection, thus ensuring the integrity of the water circuit inside the pump.

[0036] See Figure 1 , Figure 3 and Figure 6 The lower part of the second housing 12 is connected to the third housing 14. The second housing 12 is provided with a buckle part 121, and the third housing 14 is provided with a buckle groove 141 corresponding to the buckle part 121, which makes assembly simple. The water inlet 103 is provided at the bottom of the third housing 14, and a third sealing ring 9 is provided between the third housing 14 and the second housing 12 to prevent water leakage between the third housing 14 and the second housing 12.

[0037] The electric water pump of this invention, with its large output capacity, has a simple structure and low production cost. By placing the motor inside a hollow column and using the annular space formed by the hollow column and the inner wall as a water passage, the cross-sectional area for flow is increased, effectively reducing water flow resistance and thus improving the pump's drainage capacity and overall working efficiency. The inner wall is annular, and the hollow column is annular, with the inner wall and the hollow column coaxial or nearly coaxial. This coaxial or nearly coaxial design makes the cross-section of the annular water passage formed between the inner wall and the hollow column more uniform and regular, allowing the water to flow more smoothly and steadily, thereby effectively reducing hydraulic loss and improving the pump's water flow efficiency and overall drainage capacity.

[0038] In the description of this disclosure, it should be understood that the terms "upper", "lower", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0039] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0041] In this disclosure, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first feature or in indirect contact with the first feature through an intermediate medium.

[0042] It should be noted that when a component is described as being "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is described as being "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. An electric water pump with a large water output, characterized in that, The device includes a housing (1), an inner cavity (101) within the housing (1), a motor (2) and an impeller (3) within the inner cavity (101), the motor (2) being connected to and driving the impeller (3) to rotate, a hollow column (102) within the inner cavity (101), the motor (2) being installed within the hollow column (102), and an inner wall (1011) within the inner cavity (101). The hollow column (102) and the inner wall (1011) are connected. A water passage (4) is provided between the impeller (3) and the water passage (4). The water passage (4) is annular. The impeller (3) is connected to the water passage (4). The housing (1) is provided with an inlet (103) and a drain (104) connected to the water passage (4). When in use, the motor (2) drives the impeller (3) to rotate so that external water is drawn into the water passage (4) from the inlet (103) and flows through the water passage (4) and is discharged from the drain (104).

2. The electric water pump with large output capacity according to claim 1, characterized in that, The inner wall (1011) is an annular inner wall, and the hollow column (102) is an annular column. The inner wall (1011) and the hollow column (102) are coaxially or nearly coaxially arranged.

3. The electric water pump with large output capacity according to claim 1, characterized in that, The housing (1) is provided with an installation groove (105) that communicates with the water inlet (103). The impeller (3) is placed in the installation groove (105). The housing (1) is provided with a vortex guide port (106). The vortex guide port (106) is connected between the installation groove (105) and the water passage (4).

4. The electric water pump with large output capacity according to claim 1, characterized in that, A mounting bracket (5) is provided on the housing (1), and a first sealing ring (501) is provided between the mounting bracket (5) and the housing (1). A flow guide channel (502) is provided on the mounting bracket (5), and the flow guide channel (502) is connected between the impeller (3) and the water inlet (103). The flow guide channel (502) extends along the axial direction of the impeller (3).

5. The electric water pump with large output capacity according to claim 1, characterized in that, The hollow column (102) is connected to a base plate (1021). The motor (2) is provided with a motor shaft (201) for connecting with the impeller (3). The base plate (1021) is provided with a clearance hole (1022) for avoiding the motor shaft (201). The base plate (1021) is provided with a first annular protrusion (1023). The inner side of the first annular protrusion (1023) is provided with a sealing plug (6) for sealing the clearance hole (1022). The sealing plug (6) is sleeved on the motor shaft (201).

6. The electric water pump with large output capacity according to claim 5, characterized in that, The motor (2) is provided with a boss (202), the sealing plug (6) is provided with a positioning groove (600) corresponding to the boss (202), the sealing plug (6) is provided with a through hole (601), the motor shaft (201) passes through the through hole (601), the sealing plug (6) is provided with a second annular protrusion (602) and a third annular protrusion (603) coaxial with the through hole (601), the second annular protrusion (602) is placed in the clearance hole (1022), the third annular protrusion (603) abuts against the boss (202), and a pressure block (7) abuts between the housing (1) and the motor (2).

7. The electric water pump with large output capacity according to claim 1, characterized in that, The upper part of the water passage (4) is provided with an inwardly inclined annular guide slope (401).

8. The electric water pump with large output capacity according to claim 1, characterized in that, The housing (1) includes a first housing (11), a second housing (12) and a threaded sleeve (13) that are separately configured. The lower part of the first housing (11) is threadedly connected to the upper part of the threaded sleeve (13), and the upper part of the second housing (12) is threadedly connected to the lower part of the threaded sleeve (13).

9. The electric water pump with large output capacity according to claim 8, characterized in that, The first housing (11) is provided with a guide post (111) in an annular arrangement. The guide post (111) is coaxially arranged with the hollow column (102). The guide post (111) is provided with an annular groove (112) that engages with the upper part of the hollow column (102). A second sealing ring (8) is provided in the annular groove (112).

10. The electric water pump with large output capacity according to claim 8, characterized in that, The second housing (12) is connected to the lower part of the third housing (14). The second housing (12) is provided with a buckle part (121), and the third housing (14) is provided with a buckle groove (141) corresponding to the buckle part (121). The water inlet (103) is located at the bottom of the third housing (14), and a third sealing ring (9) is provided between the third housing (14) and the second housing (12).

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