Combined structure of a domestic water pump

Abstract

The application discloses a combined structure of a household water pump, and belongs to the field of household water pumps, which comprises a flow guide plate and an integrated flow guide cover, a flow guide cavity is formed between the flow guide plate and the integrated flow guide cover, an impeller is installed in the flow guide cavity, a flow guide plate pressing plate is installed on the side of the flow guide plate which is away from the integrated flow guide cover, the flow guide plate comprises a flow guide part and a positioning part, an axial connecting step is formed between the flow guide part and the positioning part, the integrated flow guide cover comprises a pressing plate connecting part, the flow guide plate pressing plate is used for pressing the flow guide plate on the integrated flow guide cover, in the application, the integrated flow guide cover can prevent water flow from leaking on the flow guide cover, the flow guide plate is pressed by the flow guide plate pressing plate and the pressing plate connecting part, and the axial connecting step is used for allowing the impact of the water flow on the flow guide part to only cause deformation of the flow guide part, and the deformation amount cannot be transmitted to the positioning part, so that no gap is formed at the connecting position, and the water pump is prevented from leaking due to the impact of the water flow.

Description

Technical Field

[0001] This invention relates to the field of household water pumps, and in particular to a combined structure for a household water pump. Background Technology

[0002] In household water pumps, water is driven by the rotation of an impeller and then discharged outwards through a flow channel within the pump body. Before the water enters the flow channel, a guide vane is needed to determine the direction of water flow. During long-term use, the continuous impact of the water flow on the guide vane causes it to gradually deform, leading to gaps at the connection between the guide vane and other structures. This can result in pump body seal failure and leakage. Therefore, a stronger pump assembly structure is needed to minimize leakage during long-term use.

[0003] For example, a patent disclosed in Chinese patent literature, "A Novel Water Pump," with publication number CN206801956U, includes a housing, a pump body, and a motor disposed within the housing. One end of the housing has an air inlet, and a fan blade is fixedly connected to the motor shaft at the air inlet. The housing includes an outer cylinder, an inner cylinder, and an end cap. The motor is located in the middle of the inner cylinder. An air inlet channel is formed between the inner wall of the inner cylinder and the outer wall of the motor, and an air outlet channel is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder. The air inlet channel and the air outlet channel are connected. An air outlet connected to the air outlet channel is provided at the outer end of the outer cylinder. The drawback of this patent is that after the impeller directs the water flow outward, the water flows through a guide plate into the flow channel. During this process, the water flow impacts the guide plate, causing deformation and creating gaps at the connection between the guide plate and other structures, leading to leakage. Summary of the Invention

[0004] The present invention aims to overcome the problem in the prior art where the guide plate of a household water pump is easily deformed due to the impact of water flow on it during use, which in turn leads to water leakage. The invention provides a combined structure for a household water pump that gives the guide plate better strength and makes it less prone to deformation or leakage.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention discloses a combined structure for a household water pump, comprising a guide plate and an integrated guide cover. A guide cavity is formed between the guide plate and the integrated guide cover, and an impeller is installed inside the guide cavity. A guide plate pressure plate is installed on the side of the guide plate facing away from the integrated guide cover. The guide plate includes a guide portion and a positioning portion, and an axial connecting step is formed between the guide portion and the positioning portion. The integrated guide cover includes a pressure plate connecting portion, and the guide plate pressure plate presses the guide plate tightly onto the integrated guide cover. The inner sidewall of the pressure plate connecting portion is in contact with the axial connecting step.

[0007] In this application, the integrated guide cover prevents water leakage from the guide cover. The guide plate is pressed tightly by the guide plate pressure plate and the pressure plate connection part, making the positioning of the guide plate reliable. The axial connecting step ensures that the impact of water flow on the guide part will only cause deformation on the guide part, and the deformation will not be transmitted to the positioning part. Therefore, no gap will be generated at the connection, thereby avoiding water pump leakage due to water flow impact.

[0008] Preferably, the guide plate pressure plate is provided with a limiting groove, and the guide plate is provided with a limiting molding structure located within the limiting groove. The limiting molding structure is formed by molding, which makes the installation of the guide plate and the guide plate pressure plate more convenient, and can limit the circumferential relative position of the guide plate and the guide plate pressure plate, thereby facilitating the installation with the integrated guide cover.

[0009] Preferably, the pressure plate connecting portion has a plurality of grooves spaced apart in the circumferential direction. The grooves open in the direction towards the guide plate, and a reinforcing plate is provided within each groove. One end of the reinforcing plate abuts against the limiting molding structure. The grooves reduce the weight of the pressure plate, allowing it to have sufficient thickness to install the bolt structure. The reinforcing plate increases the strength of the grooves and improves the reliability of the clamping action against the limiting molding structure.

[0010] Preferably, a sealing ring is installed between the pressure plate connection and the guide plate, which can further prevent liquid in the guide cavity from leaking from the connection.

[0011] Preferably, the integrated flow guide cover also includes a water inlet valve structure. The water inlet valve structure includes a water inlet valve channel connected to a water inlet. A water inlet valve core is installed inside the water inlet valve channel, and the water inlet valve core has a valve core opening. When the valve core opening is aligned with the water inlet, water flows through the valve core opening into the water inlet valve channel. When the valve core opening is removed from the water inlet, water cannot enter the water inlet valve channel. This solution integrates the water inlet valve structure with the flow guide cavity structure, ensuring that there are no gaps in the structure from the moment the liquid enters the water inlet valve until it enters the impeller, further reducing the possibility of water pump leakage.

[0012] Preferably, the valve core is also equipped with a knob located outside the pump body. This knob allows the operator to quickly and manually control the water pump switch.

[0013] Preferably, a pump body structure is also installed on the guide plate; the pump body structure includes an outer cylinder, an inner cylinder, a stator, a rotor and a rotating shaft, an outer flow channel is formed between the outer cylinder and the inner cylinder, a guide hole communicating with the outer flow channel is provided on the guide part, and the impeller is installed on one end of the rotating shaft.

[0014] Preferably, the inner cylinder is further provided with a front end cover and a rear end cover at both ends. A front end bearing is installed on the front end cover and a rear end bearing is installed on the rear end cover. The rotating shaft is adapted to and connected to the front end bearing and the rear end bearing, respectively.

[0015] Preferably, a liquid accumulation chamber is provided between the front end cover and the guide plate. The guide plate includes an inner molded structure protruding towards the front end cover, and the outer edge of the inner molded structure forms an opening for the liquid accumulation chamber with the front end cover. This structure allows the liquid permeating from the guide chamber to enter the liquid accumulation chamber through the opening under centrifugal force, and remain in the liquid accumulation chamber due to the obstruction of the support ring, thereby preventing the liquid in the guide chamber from entering the rotor inside the inner cylinder.

[0016] Preferably, the guide plate is further provided with a guide plate reinforcement structure, and the liquid accumulation cavity is also provided with a reinforcing protrusion. The reinforcing protrusion abuts against the guide plate reinforcement structure, and the other side of the guide plate reinforcement structure abuts against the outer wall of the guide cavity. The guide plate reinforcement structure can form a seal on the guide cavity sidewall. At the same time, since the reinforcing protrusion and the guide cavity sidewall are mutually supported by the guide plate reinforcement structure, deformation of the guide plate is not easily caused.

[0017] Therefore, the present invention has the following beneficial effects: (1) the guide plate has better strength and is not easy to deform or leak; (2) it is easy to install; (3) the water inlet valve can be quickly controlled; (4) it has good sealing performance and liquid is not easy to leak into the inner cylinder. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of the pump body after the outer shell of the present invention is hidden.

[0020] Figure 3 This is a cross-sectional schematic diagram of the internal structure of the present invention.

[0021] Figure 4 This is a cross-sectional schematic diagram of the outer cylinder, inner cylinder, and guide plate of the present invention.

[0022] Figure 5 This is the present invention. Figure 3 A magnified view of a portion of the central guide cavity.

[0023] Figure 6 This is a schematic diagram of one type of integrated flow guide cover in this application.

[0024] In the diagram: 1. Pump housing; 2. Controller; 3. Pump body; 4. Integrated guide cover; 5. Guide plate; 6. Guide plate pressure plate; 7. Pump structure; 8. Guide cavity; 9. Impeller; 11. Guide section; 12. Positioning section; 13. Axial connection step; 14. Pressure plate connection section; 15. Limiting groove; 16. Limiting molding structure; 17. Groove; 18. Reinforcing plate; 19. Sealing ring; 21. Inlet; 22. Inlet valve core; 23. Valve core opening; 24. Connection window; 25. Knob; 26. Outer cylinder; 27. Inner cylinder; 28. Outer flow channel; 29. ​​Shaft; 30. Rotor; 31. Outlet; 32. Outlet valve; 33. Rear end cover; 34. Front end cover; 35. Front... End bearing 36, rear bearing 37, front bend of outer cylinder 38, rear bend of outer cylinder 39, front bend of inner cylinder 40, rear bend of inner cylinder 41, guide hole 42, welding notch of outer cylinder 43, guide plate reinforcing structure 44, welding step of inner cylinder 45, welding notch of inner cylinder 46, rear bearing hole 47, rear limiting seat 48, front bearing hole 49, radial elastic sealing ring 50, support ring 51, liquid accumulation cavity 52, inner molded structure of guide plate 53, liquid accumulation cavity opening 54, reinforcing protrusion 55, outer wall of guide plate 56, mounting block 57, elastic structure 58, mounting nut 59, toothed washer. Detailed Implementation

[0025] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1-6 In the illustrated embodiment, a combined structure of a household water pump includes a pump housing 1, within which a controller 2 and a water pump body 3 are installed.

[0027] The pump body includes an integrated guide cover 4, a guide plate 5, a guide plate pressure plate 6, and a pump body structure 7. A guide cavity 8 is formed between the guide plate and the integrated guide cover, and an impeller 9 is installed in the guide cavity. The guide plate pressure plate is installed on the side of the guide plate facing away from the integrated guide cover. The guide plate includes a guide part 11 and a positioning part 12, and an axial connecting step 13 is formed between the guide part and the positioning part. The integrated guide cover includes a pressure plate connecting part 14, and the guide plate pressure plate presses the guide plate tightly onto the integrated guide cover. The inner wall of the pressure plate connecting part is in contact with the axial connecting step.

[0028] The guide plate pressure plate is provided with a limiting groove 15, and the guide plate is provided with a limiting molding structure 16 located within the limiting groove. The pressure plate connecting part is provided with a plurality of grooves 17 spaced apart in the circumferential direction. The grooves open in the direction facing the guide plate, and a reinforcing plate 18 is provided within the groove. One end of the reinforcing plate abuts against the limiting molding structure. A sealing ring 19 is installed between the pressure plate connecting part and the guide plate.

[0029] The integrated flow guide cover also includes a water inlet valve structure. The water inlet valve structure includes a water inlet valve channel connected to a water inlet 21. A water inlet valve core 22 is installed inside the water inlet valve channel. The water inlet valve core has a valve core opening 23. When the valve core opening is aligned with the water inlet, water flows through the valve core opening into the water inlet valve channel. When the valve core opening is removed from the water inlet, water cannot enter the water inlet valve channel. The water inlet valve core is a hollow structure, and its lower part has several connecting windows 24 for connecting the interior of the water inlet valve core and the flow guide cavity. A knob 25 located outside the pump body housing is also provided at the upper end of the water inlet valve core.

[0030] The pump body structure includes an outer cylinder 26 and an inner cylinder 27, with an external flow channel 28 formed between the outer and inner cylinders. A rotating shaft 29 and a rotor 30 are installed inside the inner cylinder, and a water outlet 31 is provided on the outer cylinder. A water outlet valve 32 is installed at the water outlet. The end of the outer and inner cylinders closest to the guide plate is the front end, and the end furthest from the guide plate is the rear end. A rear end cover 33 is installed at the rear end of the outer and inner cylinders, and a front end cover 34 is installed at the front end of the outer and inner cylinders. A front end bearing 35 is installed in the front end cover, and a rear end bearing 36 is installed in the rear end cover. The rotating shaft is adapted to the front and rear end bearings, and the impeller is installed on the rotating shaft located in front of the guide plate.

[0031] The outer cylinder includes a front bend edge 37 and a rear bend edge 38 located at both ends. The inner cylinder includes a front bend edge 39 and a rear bend edge 40 located at both ends. Both the front bend edges of the outer and inner cylinders are welded to the guide plate, and the rear bend edges of the outer and inner cylinders are welded together. The bending direction of the front bend edge of the outer cylinder is away from the outer cylinder axis, and the weld between the front bend edge and the guide plate is located away from the outer cylinder axis. The bending direction of the front bend edge of the inner cylinder is towards the inner cylinder axis, and the weld between the front bend edge and the guide plate is located close to the inner cylinder axis. The rear bend edge of the outer cylinder is located on the side outside the outer flow channel relative to the rear bend edge of the inner cylinder. The weld between the rear bend edge of the outer cylinder and the rear bend edge of the inner cylinder is located on the side outside the outer flow channel.

[0032] The flow guide section is provided with a flow guide hole 41, which is located between the outer cylinder and the inner cylinder. An axial connecting step is formed between the positioning section and the flow guide section, and an outer cylinder welding recess 42 is formed between the axial connecting step and the outer cylinder. The flow guide plate is also provided with a molded flow guide plate reinforcing structure 43, which protrudes on the side facing the rotor and is recessed on the side facing the impeller. An inner cylinder welding step 44 is formed between the flow guide plate reinforcing boss and the flow guide section. The inner cylinder welding step is located between the inner cylinder and the inner cylinder axis, and an inner cylinder welding recess 45 is formed between the inner cylinder welding step and the inner cylinder.

[0033] The rear end cover includes a rear end bearing hole 46 for limiting the rear end bearing and a rear end limiting seat 47 for limiting the inner cylinder. The outer side of the rear end limiting seat fits against the inner side of the inner cylinder to improve the concentricity of the rear end of the inner cylinder and the rotating shaft, as well as the structural strength.

[0034] The front end cover includes a front bearing hole 48 for limiting the front bearing, and a radial elastic sealing ring 49 is provided between the front end cover and the rotating shaft. The outer side of the front end cover fits against the inner side of the inner cylinder, which can improve the concentricity of the front end of the inner cylinder and the rotating shaft and the structural strength. The front end cover is also provided with a support ring 50 that abuts against the bent edge of the front end of the inner cylinder. The support ring can improve the reliability of the welding joint between the inner cylinder and the guide plate, and can also further seal the joint to prevent liquid from flowing into the space where the rotor is located. A liquid accumulation chamber 51 is also provided between the front end cover and the guide plate. The guide plate includes an inner molded structure 52 protruding towards the front end cover. The liquid accumulation chamber is located between the support ring and the inner bent structure. The outer edge of the inner molded structure of the guide plate forms a liquid accumulation chamber opening 53 between the front end cover and the liquid. The liquid that seeps out of the guide chamber will enter the liquid accumulation chamber from the liquid accumulation chamber opening under the action of centrifugal force, and will remain in the liquid accumulation chamber under the obstruction of the support ring, thereby preventing the liquid in the guide chamber from entering the rotor inside the inner cylinder. The liquid accumulation cavity is also provided with a reinforcing protrusion 54, which abuts against the guide plate reinforcement structure. The other side of the guide plate reinforcement structure, that is, the side facing the impeller, abuts against the outer wall 55 of the guide cavity. The guide plate reinforcement structure can form a seal on the guide cavity sidewall. At the same time, since the reinforcing protrusion and the guide cavity sidewall are mutually supported by the guide plate reinforcement structure, it is not easy to cause deformation of the guide plate.

[0035] The rotor is also equipped with a mounting block 56 adapted to be installed in the molded structure inside the guide plate, which can form a seal for the guide cavity. An elastic structure 57 is installed between the mounting block and the impeller, which is used to buffer the impact of water flow on the impeller. The elastic structure includes a mounting block abutment seat, an impeller abutment seat, and a spring installed between the mounting block abutment seat and the impeller abutment seat.

[0036] A mounting nut 58 is also installed on one end of the rotating shaft located inside the impeller. The mounting nut is used to abut against the various structures on the rotating shaft located in front of the guide plate, thereby fully fixing them. A toothed washer 59 is also installed between the mounting nut and the impeller. The toothed washer has teeth on its axial end face facing the mounting nut. Compared with ordinary flat washers or spring washers, it will undergo significant deformation after installation. Under the same installation torque, it can improve the stability of the shaft end nut connection and avoid deformation of the guide plate due to excessive installation torque.

[0037] During the assembly of the pump body structure, the outer cylinder and inner cylinder are first pre-fixed to the guide plate. Then, welding is performed at the connection between the rear bent edges of the outer cylinder and the rear bent edges of the inner cylinder. Next, welding is performed at the connection between the front bent edge of the inner cylinder and the guide plate, and at the connection between the front bent edge of the outer cylinder and the guide plate. Finally, the outlet valve is welded to the outlet. Then, front cover with a front bearing and rear cover with a rear bearing are installed on both ends of the rotating shaft with the rotor installed, and a radial elastic sealing ring is installed in the front cover. Then, the assembled structure is installed into the inner cylinder, and one end of the rotating shaft passes through the guide plate. Then, the guide cavity sidewall, mounting block, elastic structure, and impeller are installed in sequence at the front of the guide plate, and finally, it is fixed with mounting nuts.

[0038] After the pump body structure is assembled, the integrated guide cover and guide plate pressure plate are then bolted to both sides of the guide plate to complete the fixation. Finally, the assembled pump body and controller are installed into the pump body housing.

[0039] During the use of the device, water flows into the impeller through the inlet and inlet valve. Then, through the rotation of the impeller, the water flows outward into the guide cavity. The water in the guide cavity then flows into the outer flow channel through the guide hole and finally leaves the pump body through the outlet valve.

Claims

1. A combined structure for a household water pump, characterized in that, The device includes a guide plate and an integrated guide cover, forming a guide cavity between the guide plate and the integrated guide cover. An impeller is installed inside the guide cavity. A guide plate pressure plate is installed on the side of the guide plate facing away from the integrated guide cover. The guide plate includes a guide part and a positioning part, with an axial connecting step formed between the guide part and the positioning part. The integrated guide cover includes a pressure plate connecting part, and the guide plate pressure plate presses the guide plate tightly onto the integrated guide cover. The inner sidewall of the pressure plate connecting part fits against the axial connecting step. A pump body structure is also installed on the guide plate. The pump body structure includes an outer cylinder, an inner cylinder, a stator, a rotor, and a rotating shaft. A front end cover and a rear end cover are installed at both ends of the inner cylinder. A liquid accumulation cavity is provided between the front end cover and the guide plate, and a radial elastic sealing ring is provided between the front end cover and the rotating shaft.

2. The combined structure of a household water pump according to claim 1, characterized in that, The guide plate pressure plate is provided with a limiting groove, and the guide plate is provided with a limiting molding structure located in the limiting groove.

3. The combined structure of a household water pump according to claim 2, characterized in that, The pressure plate connecting part is provided with a number of grooves spaced apart in the circumferential direction. The grooves open in the direction towards the guide plate. A reinforcing plate is provided in the groove. One end of the reinforcing plate abuts against the limiting molding structure.

4. The combined structure of a household water pump according to claim 1, characterized in that, A sealing ring is installed between the pressure plate connection and the guide plate.

5. The combined structure of a household water pump according to claim 1, characterized in that, The integrated flow guide cover also includes a water inlet valve structure, which includes a water inlet valve channel connected to a water inlet. A water inlet valve core is installed inside the water inlet valve channel, and the water inlet valve core has a valve core opening. When the valve core opening is aligned with the water inlet, water flows through the valve core opening into the water inlet valve channel. When the valve core opening is moved away from the water inlet, water cannot enter the water inlet valve channel.

6. The combined structure of a household water pump according to claim 5, characterized in that, The inlet valve core is also equipped with a knob located outside the pump body.

7. The combined structure of a household water pump according to claim 1, characterized in that, An outer flow channel is formed between the outer cylinder and the inner cylinder. The flow guide is provided with a flow guide hole that communicates with the outer flow channel. The impeller is mounted on one end of the rotating shaft.

8. The combined structure of a household water pump according to claim 7, characterized in that, A front bearing is installed on the front cover, and a rear bearing is installed on the rear cover. The rotating shaft is adapted to and connected to the front bearing and the rear bearing, respectively.

9. The combined structure of a household water pump according to claim 8, characterized in that, The guide plate includes an inner molded structure protruding toward the front cover, and a liquid accumulation cavity opening is formed between the outer edge of the inner molded structure and the front cover.

10. The combined structure of a household water pump according to claim 9, characterized in that, The guide plate is also provided with a guide plate reinforcement structure, and the liquid accumulation cavity is also provided with a reinforcement protrusion. The reinforcement protrusion abuts against the guide plate reinforcement structure, and the other side of the guide plate reinforcement structure abuts against the outer wall of the guide cavity.

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