Pump cover structure and swimming pool water pump

Abstract

The utility model discloses a pump cover structure and swimming pool water pump, include: pump cover body, the pump cover body includes volute portion and filter chamber portion, just the volute portion with filter chamber portion is integrative forming structure, the filter chamber portion has the water inlet and the top opening of going up, the top of volute portion has the water outlet, the bottom of filter chamber portion is linked together with the inside space of volute portion through the communicating port. Through the sealing port of variable diameter compression, the same pump body interface can be compatible with multiple mainstream pipeline sizes, reduce the dependence on additional variable diameter accessories, simplify the installation process, greatly shorten the installation time, through the cylindrical flow guide sleeve of integrative forming in the pump cover structure, solve the problem of low energy efficiency caused by the import flow state confusion of traditional water pump, and the flow guide sleeve effectively pretreats and rectifies the water flow before the impeller suction, and then improves the reliability and ease of use of the product.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, and in particular to a pump cover structure and a swimming pool water pump. Background Technology

[0002] Pool pumps are the core power equipment of pool water circulation and purification systems. The rationality of their structure, energy efficiency, ease of installation, and ease of daily maintenance together determine the overall performance and user experience of the product.

[0003] However, in existing pool water pump products, the pump head is typically composed of multiple independent components, such as the pre-filter canister, volute, and adapter flange connecting the motor. These are all separate parts, assembled using multiple bolts and O-rings. This modular structure not only results in a large number of parts and a complex assembly process, but more importantly, each sealing surface constitutes a potential leakage point. Under long-term pressure fluctuations and environmental changes, leakage problems easily occur, reducing the long-term reliability of the product. Based on this, the external connection port of this traditional structure also has serious limitations. The connection size of its inlet and outlet is usually fixed to a single specification. However, in actual installation, especially in the case of equipment upgrades, the size of the pre-buried pipeline system on site often does not match the pump interface size, forcing installers to use additional third-party reducers / fitters for conversion. This not only increases the complexity of installation and material costs, but also brings additional leakage risks due to the new conversion points. In addition, the change of the flow field state when the water flows from the large filter chamber space into the narrow suction port in the center of the impeller is critical. Traditional designs lack effective internal flow channel guidance. Before entering the impeller, the water flow often forms irregular turbulence and tangential pre-swirl. The chaotic flow state will cause violent and disorderly collisions with the high-speed rotating impeller blades, which not only causes huge hydraulic energy loss and significantly reduces the overall efficiency of the water pump, but is also the main cause of pump operating noise, vibration and even cavitation, which adversely affects the performance and service life of the water pump. Therefore, there is an urgent need for a pump cover structure and a swimming pool water pump. Utility Model Content

[0004] The purpose of this utility model is to address the deficiencies in the existing technology by proposing a pump cover structure and a swimming pool water pump.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A pump cover structure, comprising: The pump cover body includes a volute and a filter chamber, and the volute and filter chamber are integrally formed structures. The filter chamber has an inlet and an upward-facing top opening, while the top of the volute has an outlet. The bottom of the filter chamber is connected to the internal space of the volute section via a connecting port; At the connection port, a cylindrical guide sleeve is integrally formed and extends into the volute portion. The central axis of the guide sleeve coincides with the rotation axis of the impeller to be installed in the volute portion. A filter basket that is detachably installed inside the filter chamber section; And a cover assembly for sealing the top opening.

[0006] Furthermore, the cover assembly includes a transparent cover to allow observation of the filter basket's condition without opening the cover.

[0007] Furthermore, the cover assembly also includes a locking ring that mates with the top opening, the locking ring being used to detachably secure the transparent cover to the top opening without tools.

[0008] Furthermore, the filter chamber is integrally formed with a drain outlet located below the water inlet, and the drain outlet is equipped with a removable sealing plug.

[0009] Furthermore, it includes: a motor assembly, the motor assembly comprising: Motor housing; A drive board housed within the motor housing; And a heat dissipation system for cooling the drive board; A rotating shaft driven by a motor and extending from the motor housing; The pump body assembly adopts the pump cover structure as described in any one of the claims and is connected to the motor assembly via a flange; The impeller is fixed to the end of the shaft and housed in the volute of the pump assembly. The impeller’s suction port is directly opposite the outlet of the guide sleeve, and a preset operating gap is maintained between them.

[0010] Furthermore, the top of the motor housing is provided with a flip cover that cooperates with the drive plate.

[0011] Furthermore, the heat dissipation system includes a heat sink that mates with the drive board, and fan blades and a fan shroud for forced air cooling of the heat sink; A sealing assembly is installed at the location where the shaft passes through the flange connection to prevent water from inside the pump assembly from entering the motor assembly.

[0012] Furthermore, the inlet or outlet adopts a sealed port structure, including: The female port has a smooth cylindrical inner wall and an external thread on its outer wall. The elastic sealing ring has at least two coaxially arranged sealing lips with different diameters in its inner hole, including an inner sealing lip and an outer sealing lip. And a lock nut with internal threads, the internal threads of the lock nut engaging with the external threads of the female port, and a pressing surface on its inner end face, used to apply pressure to the elastic sealing ring when the lock nut is tightened, causing it to elastically deform and grip the pipe it contacts.

[0013] Furthermore, the inner bore of the elastic sealing ring has a stepped profile, and the inner sealing lip is located in the smaller diameter section of the stepped profile for sealing with a pipe of the first outer diameter. The outer sealing lip is located in the larger diameter section of this stepped profile and is used to seal with pipes of a second outer diameter. The clamping surface of the lock nut is a tapered inclined surface. When the lock nut is tightened, the tapered inclined surface radially compresses the elastic sealing ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: By using a variable-diameter compression sealing port, the same pump body interface can be natively compatible with multiple mainstream pipe sizes, reducing reliance on additional variable-diameter fittings, greatly simplifying the installation process, and significantly shortening installation time. A more reliable active compression seal replaces multiple traditional connection points with uncertainties, further enhancing the long-term stability of the entire pipeline system. The integrated cylindrical flow guide sleeve inside the pump cover structure solves the problem of low energy efficiency caused by chaotic inlet flow in traditional water pumps. Furthermore, the flow guide sleeve effectively pre-treats and rectifyes the water flow before the impeller is sucked in, eliminating harmful turbulence and pre-swirl, stabilizing the flow field into an ideal axial flow. This allows the impeller to operate stably near its highest efficiency point, significantly improving the overall efficiency of the water pump and reducing energy consumption. At the same time, the stable flow also greatly reduces noise and vibration caused by water flow impact and effectively suppresses cavitation, significantly extending the service life of the impeller and the entire machine, thereby improving the product's reliability, compatibility, energy efficiency, and ease of use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the pump cover structure and the overall structure of the pool water pump proposed in this utility model. Figure 2 This is a schematic diagram showing the unfolded structure of the pump cover and the pool water pump proposed in this utility model. Figure 3 This is a cross-sectional view of the pump cover structure and swimming pool pump proposed in this utility model; Figure 4 This is a front view of the pump cover structure and swimming pool pump proposed in this utility model; Figure 5This is a schematic diagram of the pump cover structure and the elastic sealing ring of the swimming pool pump proposed in this utility model.

[0016] Label Explanation: 1. Motor assembly; 11. Motor housing; 111. Flip cover; 12. Drive plate; 13. Shaft; 14. Radiator; 15. Fan blade; 16. Fan cover; 17. Sealing assembly; 2. Pump body assembly; 20. Pump cover body; 21. Volute; 211. Outlet; 22. Filter chamber; 221. Inlet; 222. Top opening; 223. Drain outlet; 23. Connecting port; 24. Cylindrical guide sleeve; 3. Impeller; 4. Filter basket; 5. Cover assembly; 51. Cover; 52. Locking ring; 6. Sealing port structure; 61. Port female; 611. External thread; 62. Elastic sealing ring; 621. Inner sealing lip; 622. Outer sealing lip; 63. Locking nut; 631. Pressing surface. Detailed Implementation

[0017] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this invention. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0018] like Figures 1-5 As shown, the pump cover structure comprises a motor assembly and a pump body assembly, which are detachably connected via a flange. An impeller 3 is installed between them. The pump body assembly has a pump cover body 20 mounted on it. The filter chamber 22 and the volute 21 within the pump cover body 20 are integrally molded, preferably using high-strength engineering plastic in a single injection molding process. This integral structure fundamentally eliminates the sealing surfaces between components present in traditional split pump heads, thus reducing the potential risk of leakage and improving the overall structural strength. To improve the pump's hydraulic performance and pressure resistance, the filter chamber 22 has an integrally formed inlet 221 on its upper side, while the volute 21 has an integrally formed outlet 211 on its top. To optimize hydraulic performance, the pump cover body 20 has an integrally formed cylindrical guide sleeve 24 at the connection port 23 connecting the bottom of the filter chamber 22 and the inlet of the volute 21. The guide sleeve 24 is used to rectify the fluid about to enter the impeller 3, guiding it into a smooth axial flow, thereby improving the pump's hydraulic efficiency and reducing operating noise and vibration.

[0019] Preferably, a cover assembly 5 is also provided for sealing the top opening of the filter chamber section 22. The cover 51 is made of transparent material so that the user can intuitively observe the clogging status of the filter basket 4 inside without opening the top cover. The cover assembly 5 also includes a locking ring 52, which is tool-free and allows the user to loosen or tighten it by hand, greatly simplifying the maintenance process of cleaning the filter basket 4. In addition, a drain port 223 is integrally formed on the lower side of the filter chamber section 22, which is equipped with a sealing plug for draining water accumulated in the pump during winter or maintenance to prevent equipment damage.

[0020] During assembly, the independent impeller 3 is first fixed to the end of the rotating shaft 13 of the motor assembly. Then, the motor assembly and the pump body assembly are joined and fastened together by the flange. During this process, the impeller 3 is housed in the internal cavity of the volute 21. The inlet of the impeller 3 is coaxially opposite to the outlet of the guide sleeve 24, and a preset operating gap is maintained between them to ensure efficient fluid transfer and interference-free relative rotation.

[0021] It also includes a sealing port structure 6, which comprises a port female 61 integrally formed with the pump body assembly housing. Its inner wall is a smooth cylindrical surface used to accommodate the end of the pipe and the elastic sealing ring 62. An annular groove is provided at a specific position on the inner wall for precise axial and radial positioning of the elastic sealing ring 62. The outer wall of the port female 61 is machined with robust external threads 611 for engagement with a locking nut 63. The elastic sealing ring 62 also has a unique stepped profile in its inner bore, forming at least two coaxial sealing working surfaces of different diameters. The body includes an outer sealing lip 622 located in the larger diameter section of the stepped profile and an inner sealing lip 621 located in the smaller diameter section. In the axial position, the outer sealing lip 622 is closer to the insertion end of the pipe than the inner sealing lip 621. The locking nut 63 is a large-diameter nut with internal threads that match the external threads 611 of the port female 61. Its inner end face has a pressing surface 631, preferably designed as a tapered bevel. During installation, the installer first puts the locking nut 63 on the pipe to be connected. When connecting a pipe with a smaller outer diameter, the end of the pipe is inserted into the port female 61. Because of its smaller outer diameter, it can smoothly slide past the outer sealing lip 622 and continue to advance inward until its outer wall is tightly wrapped by the smaller inner sealing lip 621, forming a preliminary seal. When connecting a pipe with a larger outer diameter, the end of the pipe is inserted into the female port 61. Due to its larger outer diameter, its advance is blocked by the stepped profile and cannot contact the inner sealing lip 621. Its outer wall will be tightly wrapped by the outer sealing lip 622, forming a preliminary seal. In either case, after the pipe is inserted, the installer immediately tightens the locking nut 63 onto the external thread 611 of the female port 61. During the tightening process, the pressing surface 631 of the locking nut 63 will advance axially and apply a uniform pressure to the root of the elastic sealing ring 62. Since the pressing surface 631 is a conical slope, the axial pressure will be converted into a stronger radial extrusion force, causing the sealing lip in contact with the pipe to undergo further elastic compression, locking it onto the outer wall of the pipe with a great clamping force.

[0022] The pool pump also includes the motor assembly and connection structure.

[0023] The motor assembly includes a motor housing 11, inside which is a drive board 12 serving as the control core for variable frequency speed regulation of the motor. It also includes a heat dissipation system to ensure stable operation of electronic components. The heat dissipation system includes a radiator 14 attached to the drive board 12 and a forced air cooling unit consisting of fan blades 15 and a fan cover 16. The top of the motor housing 11 is also provided with an openable flip cover 111. To achieve a reliable dynamic seal and prevent liquid leakage from the pump assembly into the motor assembly, a mechanical seal assembly 17 is provided at the location where the shaft 13 passes through the flange connection.

[0024] In one example, the fluid enters from the inlet 221, passes through the filter basket 4 to remove impurities, and then passes through the guide sleeve 24 to enter the center of the impeller 3. The impeller 3 rotates at high speed under the drive of the rotating shaft 13, which does work and pressurizes the fluid. The pressurized fluid gathers in the volute part 21 and is discharged through the outlet 211.

[0025] Water is first drawn into the inlet 221 through the external pipe and enters the filter chamber 22, which is integrally formed with the volute 21. At this stage, since the filter chamber and the volute are integrally formed, the connection sealing surface between the filter barrel and the pump head in the traditional pump body is fundamentally eliminated, ensuring absolute sealing during the suction stage, preventing air infiltration, and improving the pump's self-priming performance and operational stability. The water then fills the chamber and passes through the filter basket 4. Larger solid impurities such as leaves and hair in the water are effectively intercepted. Because the transparent cover 51 allows the user to visually monitor this process at any time, predictive management of the pump's operating status is achieved. The clean water that has undergone preliminary filtration gathers at the bottom of the filter chamber 22, ready to enter the next stage. The water flows through the integrally formed cylindrical guide sleeve 24. In traditional water pumps, the water flows haphazardly from the wide filter chamber, often with pre-swirl, towards the center of the impeller. The turbulent state causes violent and disorderly collisions with the high-speed rotating impeller blades, resulting in huge energy loss and noise. The guide sleeve 24 plays a role in fluid dynamics, forcing the dispersed water flow to first converge and move along the axial path of the sleeve. In this process, turbulence and pre-swirl of the water flow are effectively eliminated, forming a highly concentrated, directionally stable, and uniformly velocity axial water column. This stabilized water column, shaped by the guide sleeve 24, exits from its outlet and is precisely captured by the inlet of the impeller 3. Due to the extremely ideal inlet water flow conditions, the blades of the impeller 3 can smoothly cut into the water flow at the optimal angle of attack, efficiently converting all the mechanical energy transmitted from the shaft 13 into the kinetic and pressure energy of the water. This greatly reduces energy loss caused by impacts and eddies, allowing the impeller 3 to operate stably near its highest efficiency point. The high-pressure, high-speed water flow ejected by the impeller 3 enters the spiral flow channel of the volute 21. Since the volute 21, the front filter chamber 22, and even the outlet 211 are all seamlessly connected integral structures, the water flow has a smooth and continuous path during the conversion from high kinetic energy to high pressure energy. There are no steps or gaps caused by the splicing of parts, thus minimizing the internal friction loss. Finally, the stabilized and pressurized water flow is smoothly discharged through the top outlet 211, providing strong and stable power for the entire pool circulation system.

[0026] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the technical solution of this utility model, and are not intended to limit the specific implementation of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pump cover structure, characterized in that, include: The pump cover body (20) includes a volute portion (21) and a filter chamber portion (22), and the volute portion (21) and the filter chamber portion (22) are integrally formed structures; The filter chamber portion (22) has an inlet (221) and an upward-facing top opening (222), and the top of the volute portion (21) has an outlet (211). The bottom of the filter chamber (22) is connected to the internal space of the volute (21) through a connecting port (23); Wherein, at the connection port (23), a cylindrical guide sleeve (24) extending into the volute portion (21) is integrally formed, and the central axis of the guide sleeve (24) coincides with the rotation axis of the impeller (3) to be installed in the volute portion (21); A filter basket (4) is detachably disposed inside the filter chamber portion (22); And a cover assembly (5) for sealing the top opening (222).

2. The pump cover structure according to claim 1, characterized in that: The cover assembly (5) includes a transparent cover (51) to allow observation of the state of the filter basket (4) without opening the cover (51).

3. The pump cover structure according to claim 2, characterized in that: The cover assembly (5) also includes a locking ring (52) that engages with the top opening (222) for tool-free detachable fixation of the cover (51) to the top opening (222).

4. The pump cover structure according to claim 1, characterized in that: The filter chamber (22) is also integrally formed with a drain outlet (223) located below the water inlet (221), and the drain outlet (223) is provided with a removable sealing plug.

5. A swimming pool water pump, characterized in that, include: Motor assembly (1), the motor assembly (1) comprising: Motor housing (11); The drive plate (12) is disposed inside the motor housing (11); And a heat dissipation system for cooling the drive board (12); A rotating shaft (13) driven by a motor and extending from the motor housing (11); Pump body assembly (2), wherein the pump body assembly (2) adopts the pump cover structure as described in any one of claims 1 to 4, and is connected to the motor assembly (1) via a flange; And an impeller (3), which is fixed at the end of the rotating shaft (13) and housed in the volute portion (21) of the pump body assembly (2), wherein the suction port of the impeller (3) is directly opposite the outlet of the guide sleeve (24) and a preset operating gap is maintained between them.

6. The swimming pool pump according to claim 5, characterized in that: The top of the motor housing (11) is provided with a flip cover (111) that cooperates with the drive plate (12).

7. The swimming pool pump according to claim 5, characterized in that: The heat dissipation system includes a heat sink (14) that cooperates with the drive plate (12), and fan blades (15) and a fan cover (16) for forced air cooling of the heat sink (14). A sealing assembly (17) is provided at the location where the shaft (13) passes through the flange connection to prevent water inside the pump assembly (2) from entering the motor assembly (1).

8. The swimming pool pump according to claim 5, characterized in that: The inlet (221) or outlet (211) adopts a sealed port structure (6), including: The female port (61) has a smooth cylindrical surface on its inner wall and an external thread (611) on its outer wall. The elastic sealing ring (62) has at least two coaxially arranged sealing lips with different diameters in its inner hole, including an inner sealing lip (621) and an outer sealing lip (622). And a locking nut (63) with internal threads, the internal threads of the locking nut (63) engaging with the external threads (611) of the port female (61), and having a pressing surface (631) on its inner end face, for applying pressure to the elastic sealing ring (62) when the locking nut (63) is tightened, causing it to elastically deform and hold the pipe it contacts.

9. The swimming pool pump according to claim 8, characterized in that: The inner bore of the elastic sealing ring (62) has a stepped profile, and the inner sealing lip (621) is located in the smaller diameter section of the stepped profile for sealing with a pipe of the first outer diameter. The outer sealing lip (622) is located in the larger diameter section of the stepped profile and is used to seal with a pipe of a second outer diameter. The pressing surface (631) of the locking nut (63) is a tapered inclined surface. When the locking nut (63) is tightened, the tapered inclined surface radially compresses the elastic sealing ring (62).

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