Centrifugal pump

Abstract

A centrifugal pump comprises a pump body, a volute and a driving impeller, the volute is arranged on the pump body, the driving impeller is arranged at the power output end of the pump body and located in the volute, the centrifugal pump is characterized by further comprising a pipe connector arranged at the water outlet end of the volute, and the water flowing direction of the pipe connector is perpendicular to the water outlet direction of the volute. And a rotary impeller is arranged in the pipe joint. And the rotary impeller is arranged in the pipe joint to rectify water flow, so that the noise reduction function is realized.

Description

Technical Field

[0001] The utility model relates to a water pump, in particular to a centrifugal pump which can be suitable for pressurizing a gas water heater. Background Art

[0002] The zero cold water function of the gas water heater allows users to have hot water when they turn on the tap, but this requires a water pump to circulate the water so that the machine can heat the cold water in the pipe. At the same time, some users have low water flow and low water pressure, so a water pump is also used to increase the water flow. Therefore, the performance of the water pump plays a key role in the comfort of users' hot water use.

[0003] Existing water heaters generally use centrifugal pumps, which include a pump body, an impeller arranged on a pump body rotor, and a volute arranged on the periphery of the impeller. The volute has a water inlet port corresponding to the central cavity and an output port for receiving the water outlet end of the impeller.

[0004] Among the pain points of water heater users, water channel noise has always been an industry problem. The water outlet of the centrifugal pump often changes the flow angle, which is the source of noise. How to reduce the noise caused by the water outlet of the centrifugal pump has always been the research direction of technical personnel in this field. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a centrifugal pump integrating a water purification function in view of the above technical status quo.

[0006] The utility model solves the above technical problems by adopting the following technical solution: a centrifugal pump, comprising a pump body, a volute and a driving impeller, wherein the volute is arranged on the pump body, and the driving impeller is arranged at the power output end of the pump body and is located in the volute. The centrifugal pump is characterized in that it also comprises a pipe joint arranged on the water outlet end of the volute, the water flow direction of the pipe joint is perpendicular to the water outlet direction of the volute, and a rotating impeller is arranged in the pipe joint, and the rotating impeller comprises

[0007] a stator, disposed in the inner cavity of the pipe joint; and

[0008] The rotor is rotatably arranged on the stator and has blades capable of generating swirl flow.

[0009] Preferably, the stator comprises a connecting ring and a first snap-on portion formed on the inner side of the connecting ring, the connecting ring is limited to the inner wall of the pipe joint, the first snap-on portion protrudes downward, the rotor comprises an outer ring, an inner ring, blades and a second snap-on portion, an installation gap is formed between the inner ring and the outer ring and between the inner ring, a plurality of blades are arranged in the installation gap, the second snap-on portion is formed on the inner ring and protrudes from the surface of the inner ring, the second snap-on portion is snap-fitted with the first snap-on portion and can rotate relative to the first snap-on portion.

[0010] The blades are made of IPSE alloy material, or the surface of the blades is coated with IPSE alloy material. IPSE multi-element alloy material is a special multi-element alloy (copper-based catalyst alloy) for scale inhibition and descaling. It is an alloy material prepared by high-temperature smelting of various metal elements with different electronegativity, mainly copper, zinc, and nickel. Multi-element alloy materials are formed by strictly controlling the composition ratio of various elements and adopting special processing technology. The different potentials of different alloys are used to form a micro-electrochemical system, change the characteristics of water, inhibit the combination of calcium and magnesium with acid ions, and inhibit scale formation, thereby achieving a scale inhibition effect.

[0011] In order to make the structure compact, the pipe joint is arranged on one side of the pump body and parallel to the central axis of the driving impeller.

[0012] Furthermore, a steering member is provided on the water outlet port of the volute, and the steering member has a horizontal channel and a vertical channel connected to and perpendicular to the horizontal channel, the water inlet end of the horizontal channel is connected to the water outlet end of the volute, and the water outlet end of the vertical channel is connected to the water inlet end of the pipe joint. The steering member can reduce the length of the outlet section of the water pump and rectify and reduce losses, adjust the speed, direction and turbulence of the water flow, and cut off the noise transmission path.

[0013] Preferably, the diverting member further comprises a diverter channel perpendicular to the horizontal channel, the diverter channel has a smaller diameter than the vertical channel and is connected to the water inlet end of the pipe joint.

[0014] Preferably, the cross-section of the vertical channel is semicircular, and the water outlet of the horizontal channel is located on one side of the vertical channel.

[0015] Furthermore, the volute is extended with a mounting portion, the steering member is arranged in the mounting portion, and the volute is connected to the pipe joint via the mounting portion.

[0016] Considering the convenience of installing the centrifugal pump inside the gas water heater, a first mounting plate is provided on one side of the volute, and a second mounting plate is provided on one side of the pump body. Further, the mounting surface of the first mounting plate and the mounting surface of the second mounting plate are in the same plane.

[0017] Compared with the prior art, the advantages of the utility model are: a rotating impeller is arranged in the pipe joint to rectify the water flow, thereby realizing the noise reduction function; at the same time, a 90° turn in the water flow direction is completed through the pipe joint; the overall structure is compact, which is conducive to arrangement in a gas water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment.

[0019] Figure 2 for Figure 1 Exploded diagram of .

[0020] Figure 3 for Figure 1 An enlarged stereoscopic cross-sectional view of .

[0021] Figure 4 for Figure 2 Magnified exploded view of the rotating impeller.

[0022] Figure 5 Enlarged perspective view of the steering component.

[0023] Figure 6 It is a schematic diagram of the structure of the steering member from another perspective. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, the centrifugal pump in this embodiment includes a pump body 1, a volute 2, a driving impeller 11, a rotating impeller 10, a pipe joint 6 and a steering member 4. A first mounting plate 71 is provided on one side of the volute 2, and a second mounting plate 72 is provided on one side of the pump body 1. The mounting surface of the first mounting plate 71 and the mounting surface of the second mounting plate 72 are in the same plane.

[0026] The screw 12 of the volute 2 is arranged on the pump body 1, and the water inlet direction of the water inlet port 22 of the volute 2 is perpendicular to the water outlet direction. The driving impeller 11 is arranged at the power output end of the pump body 1 and is located in the volute 2. The volute 2 is extended with a mounting portion 21, and the steering member 4 is arranged in the mounting portion 21. The volute 2 is connected to the pipe joint 6 through the mounting portion 21.

[0027] The water flow direction of the pipe joint 6 is perpendicular to the water outlet direction of the volute 2 . The pipe joint 6 is arranged at one side of the pump body 1 and is parallel to the central axis of the driving impeller 11 .

[0028] Combination Figure 4As shown, the rotary impeller 10 in this embodiment includes a stator 3 and a rotor 5. The stator 3 is arranged in the inner cavity of the pipe joint 6; the rotor 5 is rotatably arranged on the stator 3 and has blades 53 that can generate swirl. Specifically, the stator 3 includes a connecting ring 31 and a first buckle portion 32 formed on the inner side of the connecting ring 31. The connecting ring 31 is limited to the inner wall of the pipe joint 6. The first buckle portion 32 protrudes downward. The rotor 5 includes an outer ring 51, an inner ring 52, blades 53 and a second buckle portion 54. The inner ring 52 is formed with the inner and outer rings 51 and between the outer rings 51 to form a mounting gap. The blades 53 are arranged in the mounting gap. The second buckle portion 54 is formed on the inner ring 52 and protrudes from the surface of the inner ring 52. The second buckle portion 54 is engaged with the first buckle portion 32 and can rotate relative to the first buckle portion 32. When the water flows through the rotary impeller, under the action of the blades 53, the water flows through the rotary impeller to form a swirl after rectification, which can reduce noise. At the same time, the blades in this embodiment can be made of IPSE alloy material, which can prevent and remove scale from the water flow.

[0029] Combination Figure 5 and Figure 6 As shown, a steering member 4 is provided on the water outlet port of the volute 2, and the steering member 4 has a horizontal channel 41 and a vertical channel 42 connected to and perpendicular to the horizontal channel 41. The water inlet end of the horizontal channel 41 is connected to the water outlet end of the volute 2, and the water outlet end of the vertical channel 42 is connected to the water inlet end of the pipe joint 6. The steering member 4 also has a diversion channel 43 perpendicular to the horizontal channel 41, the diameter of the diversion channel 43 is smaller than that of the vertical channel 42 and is connected to the water inlet end of the pipe joint 6. The cross section of the vertical channel 42 is semicircular, and the water outlet of the horizontal channel 41 is located on one side of the vertical channel 42.

[0030] The steering piece can not only reduce the length of the outlet section of the water pump, but also rectify and reduce losses, adjust the speed, direction and turbulence of the water flow, and cut off the noise transmission path. After flowing through the driving impeller, it flows into the steering piece and is diverted and diverted inside the steering piece. The water flows into the steering piece from the horizontal channel, part of the water flows into the diversion channel in advance, and the remaining water flows into the vertical channel. The water flows in the diversion channel and the vertical channel merge in the pipe joint.

[0031] The vertical channel can complete a 90° turn, and the diversion channel can divert the water flow in advance, thereby reducing the impact of the turbulent and rapid water flow on the inner wall surface and preventing a large amount of energy from being lost. After the diversion, the speed of the water flow will be weakened, and the turn can be completed more gently in the vertical channel, reducing energy loss and also helping to reduce water flow noise and vibration noise.

[0032] The diameter of the horizontal channel to the vertical channel increases gradually, releasing the pressure step by step. Each stage passes a different frequency to further reduce the noise. At the same time, the space expands step by step, which can also better rectify and decelerate, reduce the generation of eddy currents, and help reduce noise.

Claims

1. A centrifugal pump, comprising a pump body (1), a volute (2) and a driving impeller (11), wherein the volute (2) is arranged on the pump body (1), and the driving impeller (11) is arranged at the power output end of the pump body (1) and is located in the volute (2). Features The centrifugal pump further comprises a pipe joint (6) arranged on the water outlet end of the volute (2), the water flow direction of the pipe joint (6) being perpendicular to the water outlet direction of the volute (2), and a rotating impeller being arranged in the pipe joint (6), the rotating impeller (10) comprising A stator (3) is disposed in the inner cavity of the pipe joint (6); and The rotor (5) is rotatably mounted on the stator (3) and has blades (53) capable of generating a swirling flow.

2. The centrifugal pump according to claim 1, Features The stator (3) comprises a connecting ring (31) and a first snap-on portion (32) formed on the inner side of the connecting ring (31); the connecting ring (31) is limited to the inner wall of the pipe joint (6); the first snap-on portion (32) protrudes downward; the rotor (5) comprises an outer ring (51), an inner ring (52), blades (53) and a second snap-on portion (54); the inner ring (52) forms an installation gap with the inner side of the outer ring (51) and between the inner ring (51) and the outer ring (51); a plurality of blades (53) are arranged in the installation gap; the second snap-on portion (54) is formed on the inner ring (52) and protrudes from the surface of the inner ring (52); the second snap-on portion (54) is snap-fitted with the first snap-on portion (32) and can rotate relative to the first snap-on portion (32).

3. The centrifugal pump according to claim 2, Features The blades are made of IPSE alloy material, or the surface of the blades is coated with IPSE alloy material.

4. The centrifugal pump according to claim 1, Features The pipe joint (6) is arranged on one side of the pump body (1) and is parallel to the central axis of the driving impeller (11).

5. The centrifugal pump according to claim 1, Features A steering member (4) is provided on the water outlet port of the volute (2), and the steering member (4) has a horizontal channel (41) and a vertical channel (42) which is connected to and perpendicular to the horizontal channel (41), the water inlet end of the horizontal channel (41) is connected to the water outlet end of the volute (2), and the water outlet end of the vertical channel (42) is connected to the water inlet end of the pipe joint (6).

6. The centrifugal pump according to claim 5, Features The diverting member (4) also has a diverting channel (43) perpendicular to the horizontal channel (41); the diverting channel (43) has a smaller diameter than the vertical channel (42) and is connected to the water inlet end of the pipe joint (6).

7. The centrifugal pump according to claim 5, Features The cross section of the vertical channel (42) is semicircular, and the water outlet of the horizontal channel (41) is located on one side of the vertical channel (42).

8. The centrifugal pump according to claim 5, Features The volute (2) is extended to be provided with a mounting portion (21), the steering member (4) is arranged in the mounting portion (21), and the volute (2) is connected to the pipe joint (6) via the mounting portion (21).

9. The centrifugal pump according to claim 1, Features A first mounting plate (71) is provided on one side of the volute (2), and a second mounting plate (72) is provided on one side of the pump body (1).

10. The centrifugal pump according to claim 9, Features The mounting surface of the first mounting plate (71) and the mounting surface of the second mounting plate (72) are located in the same plane.

Images