A water pump with an impeller capable of being quickly disassembled

Abstract

The present invention provides a water pump with an impeller capable of being quickly disassembled, comprising an impeller, the impeller having an upper cover plate, a lower cover plate, impeller blades, a central shaft hole and a guide cone, the central shaft hole being a stepped through hole, the stepped through hole comprising a light hole and a screw hole, the screw hole being used for disassembly, the outer thread of the lower end of the guide cone being matched with the inner thread of the screw hole, the outer surface of the guide cone being provided with a guide blade, when the impeller rotates normally, the outer thread of the guide cone is screwed into the screw hole, the outer surface of the guide cone and the outer surface of the hub are smoothly transitioned, the lower end surface of the guide blade just butts against the upper end surface of the impeller blade, when the impeller needs to be disassembled from the rotating shaft, the guide cone is first screwed out of the screw hole of the impeller, and then the screw is screwed into the screw hole, and the rotating shaft is pushed out by the screw to realize disassembly. The setting of the guide cone can not only prevent water from entering the screw hole, but also extend the length of the impeller blade, thereby improving the hydraulic performance of the water pump.

Description

Technical Field

[0001] The invention relates to a water pump, in particular to a water pump whose impeller can be quickly disassembled. Background Art

[0002] In the prior art, the impeller of a water pump is usually fixed by passing the rotating shaft through the impeller and fixing it with an impeller nut at the end of the impeller. This method cannot achieve the rapid disassembly of the impeller, so a series of water pumps with impellers that can achieve rapid disassembly are produced, which is to set a stepped through hole at the center of the impeller, the stepped through hole includes a light hole and a screw hole, the light hole is used for interference fit with the rotating shaft, and the screw hole is used for fit with the screw rod, and the rotating shaft is pushed out of the light hole through the screw rod. For example, patent documents CN108825550A, CN201386660Y, and CN201190691Y all use such means to achieve rapid disassembly of the impeller, but this type of impeller is exposed during normal pumping work, that is, the screw hole is not filled, resulting in water flowing into the screw hole. On the one hand, water will rust the threads on the inner surface of the screw hole, and on the other hand, the existence of the screw hole will cause vortices to be generated around the screw hole during the rotation of the impeller, and the hydraulic performance of the water pump will decrease. Summary of the invention

[0003] The technical problem to be solved by the present invention is to achieve a quick-disassembly water pump for the impeller of the type described in the background technology, so as to prevent, during normal operation of the impeller, water from entering the screw hole and thereby corroding the threads on the inner surface of the screw hole, and, when the impeller rotates, a vortex from being generated around the screw hole and reducing the hydraulic performance of the water pump.

[0004] In order to solve the above technical problems, the technical solution of the water pump of the present invention is: a water pump, including an impeller, the impeller has an upper cover plate, a lower cover plate, impeller blades, a central shaft hole and a guide cone, the central shaft hole is a stepped through hole, the stepped through hole includes a light hole and a screw hole, the aperture of the light hole is larger than the aperture of the screw hole, the light hole is used for interference fit with the rotating shaft, the screw hole is used for disassembly, the lower end of the guide cone is provided with an external thread, the external thread of the lower end of the guide cone is matched with the internal thread of the screw hole, the outer surface of the guide cone is provided with guide blades, the number of impeller blades is consistent with the number of guide blades, and the upper end surface of the impeller hub is A plane, the guide cone has a contact surface that contacts the upper end surface of the impeller hub, a circle of grooves is arranged between the contact surface and the external thread, a sealing ring is arranged in the groove, the upper end surfaces of the impeller blades are all located in the same plane as the upper end surface of the impeller hub, when the impeller rotates normally, the external thread of the guide cone is screwed into the screw hole, the outer surface of the guide cone and the outer surface of the hub are smoothly transitioned, the lower end surface of the guide blade just butts against the upper end surface of the impeller blade, when the impeller needs to be removed from the rotating shaft, first unscrew the guide cone from the screw hole of the impeller, then screw the screw into the screw hole, and use the screw to push out the rotating shaft to achieve disassembly.

[0005] Preferably, the number of the impeller blades is 6.

[0006] Preferably, the thread of the screw hole is a triangular thread.

[0007] Preferably, the impeller is made of stainless steel.

[0008] Preferably, the impeller is made of plastic.

[0009] Preferably, the upper cover plate and the impeller blades are connected by welding, and the lower cover plate and the impeller blades are connected by welding.

[0010] Preferably, the impeller blades are evenly distributed between the upper cover plate and the lower cover plate, and the guide blades are evenly distributed on the outer surface of the guide cone.

[0011] Beneficial effects of the present invention:

[0012] 1. By setting a guide cone with external threads, the external threads of the guide cone match the internal threads of the screw hole. When the impeller rotates normally, the external threads of the guide cone are screwed into the screw hole, and the outer surface of the guide cone and the outer surface of the hub are smoothly transitioned. The lower end surface of the guide blade just butts with the upper end surface of the impeller blade. When the impeller needs to be removed from the rotating shaft, the guide cone is first screwed out of the screw hole of the impeller, and then the screw is screwed into the screw hole, and the rotating shaft is pushed out by the screw to achieve disassembly. The guide cone can close the screw hole on the impeller, so that when the impeller rotates, no vortex will be generated around the screw hole, and the hydraulic performance of the water pump will not be reduced; the guide cone has a contact surface that contacts the upper end surface of the impeller hub, and a circle of grooves is provided between the contact surface and the external threads. A sealing ring is provided in the groove to prevent water from entering the screw hole and corroding the threads on the inner surface of the screw hole.

[0013] 2. By arranging guide vanes on the outer surface of the guide cone, the number of impeller blades is consistent with the number of guide vanes, the outer surface of the guide cone and the outer surface of the hub have a smooth transition, and the lower end surface of the guide vane just butts against the upper end surface of the impeller blade, which can extend the length of the impeller blade and improve the hydraulic performance of the water pump.

[0014] On the one hand, the guide cone of the present invention can close the screw hole on the impeller, so that when the impeller rotates, no vortex will be generated around the screw hole, and the hydraulic performance of the water pump will not be reduced; water will not enter the screw hole, and the threads on the inner surface of the screw hole will not be corroded; on the other hand, the guide blades are arranged on the outer surface of the guide cone, which can extend the length of the impeller blades and improve the hydraulic performance of the water pump. That is, the guide cone of the present invention has multiple functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the separation of the impeller structure and the guide cone of the water pump in an embodiment of the present invention;

[0016] Figure 2 Schematic diagram of the screwing of the impeller structure of the water pump and the guide cone in an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of disassembling the impeller of the water pump in an embodiment of the present invention;

[0018] Figure 4 A top view of the impeller structure of the water pump and the guide cone when they are screwed together in an embodiment of the present invention;

[0019] In the figure: 1. upper cover plate, 2. lower cover plate, 3. impeller blades, 4. guide cone, 5. light hole, 6. screw hole, 7. rotating shaft, 8. external thread, 9. guide blades, 10. hub, 11. contact surface, 12. sealing ring, 13. screw. DETAILED DESCRIPTION

[0020] The technical solution of the present invention for a water pump is combined with Figure 1-4 A water pump includes an impeller, the impeller has an upper cover plate 1, a lower cover plate 2, impeller blades 3, a central axis hole and a guide cone 4, the central axis hole is a stepped through hole, the stepped through hole includes a light hole 5 and a screw hole 6, the aperture of the light hole 5 is larger than the aperture of the screw hole 6, the light hole 5 is used for interference fit with the rotating shaft 7, the screw hole 6 is used for disassembly, the lower end of the guide cone 4 is provided with an external thread 8, the external thread 8 at the lower end of the guide cone 4 is matched with the internal thread of the screw hole 6, the outer surface of the guide cone 4 is provided with guide blades 9, the number of impeller blades 3 is consistent with the number of guide blades 9, the upper end surface of the impeller hub 10 is a plane, and the guide cone 4 has The upper end surface of the hub 10 contacts the contact surface 11, and a circle of grooves is arranged between the contact surface 11 and the external thread 8, and a sealing ring 12 is arranged in the groove. The upper end surfaces of the impeller blades 3 are located in the same plane as the upper end surface of the impeller hub 10. When the impeller rotates normally, the external thread 8 of the guide cone 4 is screwed into the screw hole 6, and the outer surface of the guide cone 4 and the outer surface of the hub 10 are smoothly transitioned. The lower end surface of the guide blade 9 just butts against the upper end surface of the impeller blade 3. When the impeller needs to be removed from the rotating shaft 7, the guide cone 4 is first unscrewed from the screw hole 6 of the impeller, and then the screw 13 is screwed into the screw hole 6, and the rotating shaft 7 is pushed out by the screw 6 to achieve disassembly.

[0021] Preferably, the number of the impeller blades 3 is 6.

[0022] Preferably, the thread of the screw hole 6 is a triangular thread.

[0023] Preferably, the impeller is made of stainless steel.

[0024] Preferably, the impeller is made of plastic.

[0025] Preferably, the upper cover plate 1 and the impeller blades 3 are connected by welding, and the lower cover plate 2 and the impeller blades 3 are connected by welding.

[0026] Preferably, the impeller blades 3 are evenly distributed between the upper cover plate 1 and the lower cover plate 2 , and the guide blades 9 are evenly distributed on the outer surface of the guide cone 4 .

Claims

1. A water pump with a quickly disassembled impeller, comprising an impeller, the impeller having an upper cover plate, a lower cover plate, impeller blades, a central shaft hole and a guide cone, the central shaft hole being a stepped through hole, the stepped through hole comprising a light hole and a screw hole, the aperture of the light hole being larger than the aperture of the screw hole, the light hole being used for interference fit with the rotating shaft, the screw hole being used for disassembly, the lower end of the guide cone being provided with an external thread, the external thread of the lower end of the guide cone being matched with the internal thread of the screw hole, characterized in that: The outer surface of the guide cone is provided with guide blades, the number of impeller blades is consistent with the number of guide blades, the upper end surface of the impeller hub is a plane, the guide cone has a contact surface that contacts the upper end surface of the impeller hub, a circle of grooves is provided between the contact surface and the external thread, a sealing ring is provided in the groove, the upper end surfaces of the impeller blades are all located in the same plane as the upper end surface of the impeller hub, when the impeller rotates normally, the external thread of the guide cone is screwed into the screw hole, the outer surface of the guide cone and the outer surface of the hub are smoothly transitioned, the lower end surface of the guide blade just butts against the upper end surface of the impeller blade, when the impeller needs to be removed from the rotating shaft, first unscrew the guide cone from the screw hole of the impeller, then screw the screw into the screw hole, and use the screw to push out the rotating shaft for disassembly; the number of the impeller blades is 6; the thread of the screw hole is a triangular thread.

2. A water pump with a quickly disassembled impeller according to claim 1, characterized in that: The material of the impeller is stainless steel.

3. A water pump with a quickly disassembled impeller according to claim 1, characterized in that: The material of the impeller is plastic.

4. A water pump with a quickly disassembled impeller according to claim 2, characterized in that: The upper cover plate is connected to the impeller blades by welding, and the lower cover plate is connected to the impeller blades by welding.

5. A water pump with a quickly disassembled impeller according to claim 1, characterized in that: The impeller blades are evenly distributed between the upper cover plate and the lower cover plate, and the guide blades are evenly distributed on the outer surface of the guide cone.

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