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, and the centrifugal pump is characterized in that a rectification connector is arranged on one side of the pump body in the direction parallel to the central axis of the driving impeller, and the water inlet end of the rectification connector can receive water flow of a water outlet port of the volute; the water flowing direction of the rectification connector is perpendicular to the water outlet direction of the volute. The caliber of an inner cavity flow channel of the rectification connector is larger than that of a water outlet port of the volute. And when the water flow at the outlet of the water pump is disordered, the cavity expanding structure in the rectification joint can play a role in rectification to reduce water flow turbulence noise.

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 noise-reducing centrifugal pump in view of the above technical status quo.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a centrifugal pump, including a pump body, a volute and a driving impeller, the aforementioned volute is arranged on the pump body, the aforementioned driving impeller is arranged at the power output end of the pump body and is located in the volute, and is characterized in that a rectifying joint is provided on one side of the pump body parallel to the central axis direction of the driving impeller, the water inlet end of the rectifying joint can receive the water flow of the volute water outlet port, and the water flow direction of the rectifying joint is perpendicular to the water outlet direction of the volute; the diameter of the inner cavity flow channel of the aforementioned rectifying joint is larger than the diameter of the volute water outlet port.

[0007] The water outlet of the volute is provided with a steering member, which 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 rectifying joint. The steering member adjusts the speed, direction and turbulence of the water flow and cuts off the noise transmission path.

[0008] The steering member also has 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 rectifying joint. Water flows into the steering member from the horizontal flow channel, part of the water flows into the diversion channel in advance, and the remaining water flows into the vertical channel, and the water flows in the diversion channel and the vertical channel finally merge. The diverted water flow can be diverted more gently to reduce energy loss and noise.

[0009] 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.

[0010] Preferably, the volute is extended with a mounting portion, the steering member is arranged in the mounting portion, and the volute is connected to the rectifying joint via the mounting portion.

[0011] The caliber of the water outlet port of the rectifying joint is smaller than the caliber of the inner cavity of the rectifying joint.

[0012] The water flow direction of the water outlet port of the rectifying joint is perpendicular to the water flow direction of the inner cavity of the rectifying joint.

[0013] The rectifying joint is provided with a water softening impeller capable of preventing scale, and the water flows through the rectifying joint to flush the water softening impeller. Preferably, the water softening impeller is made of IPSE material, and the surface material of the water softening impeller is IPSE material.

[0014] The soft water impeller is specifically arranged as follows: a sleeve is arranged inside the rectifying joint, a radially protruding pressure ring is provided in the middle of the inner wall of the sleeve, and the outer edge of the soft water impeller is positioned between the aforementioned pressure ring and the inner step of the rectifying joint.

[0015] Furthermore, 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 housing. The mounting surface of the first mounting plate and the mounting surface of the second mounting plate are in the same plane, so that the centrifugal pump can be arranged in the housing of the gas water heater.

[0016] Compared with the prior art, the utility model has the following advantages: the water flow at the water pump outlet is turbulent, and the expansion cavity structure in the rectifying joint can play a rectifying role, reducing the turbulent noise of the water flow. At the same time, the water flow completes a 90° turn, which is convenient for pipeline layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of an embodiment.

[0018] Figure 2 for Figure 1 A reduced exploded view of .

[0019] Figure 3 for Figure 1 An enlarged stereoscopic cross-sectional view of .

[0020] Figure 4 for Figure 3 Enlarged view of part A in the middle.

[0021] Figure 5 This is an enlarged view of the steering component.

[0022] Figure 6 This is an enlarged view of the steering member from another perspective. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] 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 steering member 4, a water softening impeller 5 and a rectifying joint 3. The volute 2 is arranged on the pump body 1, 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 22, the steering member 4 is arranged in the mounting portion 22, and the volute 2 is connected to the rectifying joint 3 through the mounting portion 22. In this embodiment, the mounting portion 22 and the rectifying joint 3, and the volute 2 and the pump body 1 are all connected by screws.

[0025] 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 rectifying joint 3 is arranged on one side of the pump body 1 parallel to the central axis direction of the driving impeller 11, and the water inlet end of the rectifying joint 3 can receive the water flow from the water outlet port of the volute 2, and the water flow direction of the rectifying joint 3 is perpendicular to the water outlet direction of the volute 2; the flow channel diameter of the inner cavity 32 of the rectifying joint 3 is larger than the diameter of the water outlet port of the volute 2. The water flow direction of the water inlet port 21 of the volute 2 is perpendicular to the water flow direction of the outlet port.

[0027] Combination Figure 5 and Figure 6 As shown, the steering member 4 in this embodiment has a horizontal channel 41, a vertical channel 42 and a diverter channel 43 which are 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 rectifying joint 3. The diverter channel 43 has a smaller diameter than the vertical channel 42 and is connected to the water inlet end of the rectifying joint 3.

[0028] 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. The caliber of the water outlet port 31 of the rectifying joint 3 is smaller than the caliber of the inner cavity of the rectifying joint 3. The water flow direction of the water outlet port 31 of the rectifying joint 3 is perpendicular to the water flow direction of the inner cavity of the rectifying joint 3.

[0029] The steering component adjusts the speed, direction, and turbulence of the water flow and cuts off the noise transmission path. The water flows into the steering component from the horizontal flow 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 eventually merge. The diverted water flow can turn more gently to reduce energy loss and noise.

[0030] A water softening impeller 5 capable of preventing scale is provided in the rectifying joint 3. When the water flows through the rectifying joint 3, the water softening impeller 5 is flushed. The water softening impeller 5 is made of IPSE material. IPSE multi-element alloy material is a special multi-element alloy copper-based catalyst alloy for preventing and removing scale. It is an alloy material prepared by high-temperature smelting of various metal elements with different electronegativity, mainly copper, zinc, and nickel. The multi-element alloy material is 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 the formation of scale, thereby achieving a scale inhibition effect. At the same time, the scale is transformed from a dense calcite state to a loose aragonite state.

[0031] Combination Figure 4 As shown, a sleeve 6 is provided inside the rectifying joint 3 , and a radially protruding pressure ring 61 is provided in the middle of the inner wall of the sleeve 6 . The outer edge of the water softening impeller 5 is positioned between the pressure ring 61 and the inner step 33 of the rectifying joint 3 .

[0032] The water flow at the pump outlet is turbulent, and the expansion cavity structure in the rectifier joint can play a role in rectification and reduce the turbulent noise of the water flow. When the water flows into the rectifier joint and flows out, the flow channel suddenly expands and contracts when it flows out, so that some sound waves propagating along the pipeline are reflected back to the direction of the sound source at the mutation point, thereby achieving the purpose of silencing and facilitating the elimination of low and medium frequency 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 A rectifying joint (3) is provided on one side of the pump body (1) parallel to the central axis direction of the driving impeller (11); the water inlet end of the rectifying joint (3) can receive the water flow from the water outlet port of the volute (2); the water flow direction of the rectifying joint (3) is perpendicular to the water outlet direction of the volute (2); and the flow channel diameter of the inner cavity (32) of the rectifying joint (3) is larger than the diameter of the water outlet port of the volute (2).

2. The centrifugal pump according to claim 1, characterized in that A steering member (4) is provided on the water outlet port (31) 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 rectifying joint (3).

3. The centrifugal pump according to claim 2, 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 rectifying joint (3).

4. The centrifugal pump according to claim 2, 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).

5. The centrifugal pump according to claim 2, characterized in that The volute (2) is extended to be provided with a mounting portion (22), the steering member (4) is arranged in the mounting portion (22), and the volute (2) is connected to the rectifying joint (3) via the mounting portion (22).

6. The centrifugal pump according to claim 1, characterized in that The caliber of the water outlet port (31) of the rectifying joint (3) is smaller than the caliber of the inner cavity of the rectifying joint (3).

7. The centrifugal pump according to claim 6, characterized in that The water flow direction of the water outlet port (31) of the rectifying joint (3) is perpendicular to the water flow direction of the inner cavity of the rectifying joint (3).

8. The centrifugal pump according to claim 1, characterized in that The rectifying joint (3) is provided with a water softening impeller (5) capable of preventing scale, and when water flows through the rectifying joint (3), the water softening impeller (5) is flushed.

9. The centrifugal pump according to claim 8, characterized in that The water softening impeller (5) is made of IPSE material, and the surface material of the water softening impeller (5) is IPSE material.

10. The centrifugal pump according to claim 8, characterized in that The rectifying joint (3) is provided with a sleeve (6) in its interior, the sleeve (6) having a radially protruding pressure ring (61) in the middle of its inner wall, and the outer edge of the water softening impeller (5) is positioned between the aforementioned pressure ring (61) and the inner step (33) of the rectifying joint (3).

11. 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).

12. The centrifugal pump according to claim 11, 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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