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. The pipe joint is provided with a flow sensor, the flow sensor comprises a rotating impeller and a Hall element, the rotating impeller can enable water flow to generate rotational flow, and the rotating impeller is made of magnetized materials and can be rotatably arranged in an inner cavity of the pipe joint; and the Hall element is arranged on the outer wall of the pipe joint and corresponds to the rotating impeller. The rotating impeller rectifies water flow to achieve the noise reduction function, meanwhile, the rotating impeller is matched with a Hall element through a magnetized material to serve as a flow sensor, the flow sensor is integrated to the pipe connector, and the structure is more compact.

Description

Technical Field

[0001] The utility model relates to a water pump, in particular to a centrifugal pump which can be applied to pressure-boosting gas water heaters. 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-mentioned technical problem by adopting the following technical solution: a centrifugal pump, comprising a pump body, a volute and a driving impeller, the volute being arranged on the pump body, the driving impeller being arranged at the power output end of the pump body and being located in the volute, characterized in that the centrifugal pump 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, a flow sensor is arranged on the pipe joint, the flow sensor comprises a rotating impeller and a Hall element capable of causing the water flow to generate a swirling flow, the rotating impeller being made of a magnetized material and being rotatably arranged in the inner cavity of the pipe joint; the Hall element being arranged on the outer wall of the pipe joint and corresponding to the arrangement of the rotating impeller.

[0007] Furthermore, the pipe joint is provided with a filter box below the rotating impeller, and the filter box contains water purification filter material, so that the water purification function is also integrated into the pipe joint.

[0008] Furthermore, a rotating bracket is provided in the pipe joint, and the rotating impeller is rotatably provided on the rotating bracket.

[0009] Preferably, the upper end of the central axis of the rotating impeller is rotationally matched with the rotating bracket, and the lower end is rotationally matched with the top surface of the filter box.

[0010] A connecting ring is formed at the lower end of the rotating impeller, and a fixed ring is connected to the aforementioned connecting ring and can rotate with the connecting ring. The fixed ring is provided with a water purification ring made of IPSE 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] Furthermore, the fixing ring includes a circular ring portion and a buckle portion protruding from the lower end of the circular ring portion, the buckle portion is buckled on the connecting ring, and the water purification ring is provided on the inner side of the circular ring portion.

[0012] Furthermore, the pipe joint is provided with a temperature sensor capable of sensing the water temperature in the pipe joint.

[0013] 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.

[0014] 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.

[0015] Preferably, the steering member further comprises a diversion channel perpendicular to the horizontal channel, the diversion channel has a smaller diameter than the vertical channel and is connected to the water inlet end of the pipe joint.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] Compared with the prior art, the utility model has the advantages of: the rotating impeller is used to rectify the water flow, thereby realizing the noise reduction function, and at the same time, the rotating impeller uses magnetized material and Hall element to act as a flow sensor, and the flow sensor is integrated into the pipe joint, which has a more compact structure. The 90° turn of the water flow direction is completed through the pipe joint, which is convenient for arrangement in the gas water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of an embodiment.

[0021] Figure 2 for Figure 1 Exploded diagram of .

[0022] Figure 3 for Figure 1 An enlarged stereoscopic cross-sectional view of .

[0023] Figure 4 for Figure 2 A magnified exploded view of the integrated components.

[0024] Figure 5 Enlarged perspective view of the steering component.

[0025] Figure 6 It is a schematic diagram of the structure of the steering member from another perspective. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] 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.

[0028] The volute 2 is mounted on the pump body 1 by means of screws 12, 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, and the volute 2 is extended with a mounting portion 21, and the steering member 4 is arranged in the mounting portion 21, and the volute 2 is connected to the pipe joint 6 through the mounting portion 21.

[0029] 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 .

[0030] The pipe joint 6 is provided with a flow sensor, which includes a rotating impeller 5 that can generate a swirl in the water flow and a Hall element 62. The rotating impeller 5 is made of a magnetized material and is rotatably arranged in the inner cavity of the pipe joint 6; the Hall element 62 is arranged on the outer wall of the pipe joint 6 and arranged corresponding to the rotating impeller 5. The pipe joint 6 is provided with a temperature sensor 63 that can sense the water temperature in the pipe joint 6. The pipe joint 6 is provided with a filter box 9 below the rotating impeller 5. The filter box 9 has a water purification filter material (not shown in the figure). The water purification filter material can be IPSE, activated carbon, etc.

[0031] Combination Figure 4 As shown, the rotating bracket 3, the rotating impeller 5, the water purification ring 83 and the fixed ring 8 in this embodiment constitute an integrated component 10. The rotating bracket 3 is arranged in the pipe joint 6, and the rotating impeller 5 is rotatably arranged on the rotating bracket 3. The upper end of the central axis 51 of the rotating impeller 5 is rotationally matched with the rotating bracket 3, and the lower end is rotationally matched with the top surface of the filter box 9. A connecting ring 52 is formed at the lower end of the rotating impeller 5, and the fixed ring 8 is connected to the connecting ring 52 and can rotate with the connecting ring 52. The fixed ring 8 is provided with a water purification ring 83 made of IPSE material. The fixed ring 8 includes a circular ring portion 81 and a buckle portion 82 protruding from the lower end of the circular ring portion 81, and the buckle portion 82 is snapped onto the connecting ring 52, and the water purification ring 83 is provided on the inner side of the circular ring portion 81.

[0032] The rotating impeller rectifies the water flow to achieve noise reduction. At the same time, the rotating impeller uses magnetized materials and Hall elements to act as a flow sensor. The flow sensor is integrated into the pipe joint, making the structure more compact. The 90° turn of the water flow direction is completed through the pipe joint, which is convenient for layout in the gas water heater.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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 located in the volute (2), characterized in that 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 flow sensor being arranged on the pipe joint (6), the flow sensor comprising a rotating impeller (5) capable of generating a swirling flow of water and a Hall element (62), the rotating impeller (5) being made of a magnetized material and being rotatably arranged in the inner cavity of the pipe joint (6); the Hall element (62) being arranged on the outer wall of the pipe joint (6) and corresponding to the rotating impeller (5).

2. The centrifugal pump according to claim 1, characterized in that The pipe joint (6) is located below the rotating impeller (5) and is provided with a filter box (9), wherein the filter box (9) contains water purification filter material.

3. The centrifugal pump according to claim 2, characterized in that A rotating bracket (3) is arranged inside the pipe joint (6), and the rotating impeller (5) is rotatably arranged on the rotating bracket (3).

4. The centrifugal pump according to claim 3, characterized in that The upper end of the central axis of the rotating impeller (5) is rotationally matched with the rotating bracket (3), and the lower end is rotationally matched with the top surface of the filter box (9).

5. The centrifugal pump according to claim 3, characterized in that A connecting ring (52) is formed at the lower end of the rotating impeller (5), and a fixing ring (8) is connected to the connecting ring (52) and can rotate together with the connecting ring (52). A water purification ring (83) made of IPSE material is provided on the fixing ring (8).

6. The centrifugal pump according to claim 5, characterized in that The fixing ring (8) comprises a circular ring portion (81) and a buckle portion (82) protruding from the lower end of the circular ring portion (81); the buckle portion (82) is buckled onto the connecting ring (52); and the water purification ring (83) is disposed on the inner side of the circular ring portion (81).

7. The centrifugal pump according to claim 1, characterized in that The pipe joint (6) is provided with a temperature sensor (63) capable of sensing the water temperature in the pipe joint (6).

8. The centrifugal pump according to claim 1, characterized in that 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).

9. The centrifugal pump according to claim 1, characterized in that 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).

10. The centrifugal pump according to claim 9, characterized in that 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).

11. The centrifugal pump according to claim 9, characterized in that 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).

12. The centrifugal pump according to claim 9, characterized in that 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).

13. The centrifugal pump according to claim 1, characterized in that 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).

14. The centrifugal pump according to claim 13, characterized in that 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.

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