Noise reduction structure of flow guide pump

Abstract

The utility model belongs to the technical field of water pumps, and particularly relates to a noise reduction structure of a flow guide pump, which comprises a first shell, a second shell and a third shell, the second shell is in butt joint with the first shell in a buckled mode, the second shell is provided with a second flow guide face, and when the first shell and the second shell are buckled, the second flow guide face and the first flow guide face define a flow channel; the impeller is rotationally arranged in the first shell and used for guiding water in the water inlet pipe into the flow channel and pumping the water in the flow channel out of the water outlet pipe, a limiting protrusion is arranged on the second shell, a limiting groove is formed in the first shell, and the limiting protrusion can be matched with the limiting groove when the first shell and the second shell are buckled with each other; the limiting groove can limit the setting angle of the second shell relative to the first shell. The flow guide pump can prevent gas accumulation caused by dislocation of the butt joint position of the water outlet pipe and the flow channel, so that cavitation in the flow guide pump can be prevented, the quality of the pump body can be improved, the service life of the pump body can be prolonged, and noise and abnormal sound can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps, and in particular relates to a noise reduction structure for a diversion pump. Background Art

[0002] Diversion pumps are widely used in industry, particularly in sewage treatment, irrigation, and waterway control. Their operating principle relies primarily on their internal impeller and diversion structure. When the motor drives the impeller, liquid is drawn into the pump body, where it gains energy from the impeller and is then transported along the diversion structure to the desired location. Specifically, diversion pumps use centrifugal force to draw the medium from the inlet pipe into the pump body. The high-speed rotation of the impeller then propels the medium out through the diversion cylinder, achieving the desired conveying or circulation purpose.

[0003] The existing diversion pump has no anti-misalignment structure, and is prone to misalignment during the assembly of the front and rear shells, which in turn causes misalignment between the flow channel and the water outlet. Gas is easily accumulated at the eccentric misalignment, resulting in cavitation and affecting the quality of the pump body. Utility Model Content

[0004] The purpose of the utility model is to provide a noise reduction structure for a diversion pump, aiming to solve the technical problem in the prior art that the internal flow channel and the water outlet pipe of the diversion pump are easily eccentrically misaligned.

[0005] To achieve the above-mentioned purpose, an embodiment of the present invention provides a noise reduction structure for a diversion pump, comprising: a first shell, which is provided with a first guide surface, a water inlet pipe and a water outlet pipe; a second shell, which is mutually buckled and docked with the first shell, and the second shell is provided with a second guide surface, and when the first shell and the second shell are mutually buckled, the second guide surface and the first guide surface form a flow channel; an impeller, which is rotatably arranged in the first shell, and is used to introduce water in the water in the water inlet pipe into the flow channel, and pump the water in the flow channel out of the water outlet pipe, wherein a limiting protrusion is provided on the second shell, and a limiting groove is provided on the first shell, and the limiting protrusion can cooperate with the limiting groove when the first shell and the second shell are mutually buckled, and the limiting groove can limit the setting angle of the second shell relative to the first shell.

[0006] Optionally, a limiting wall is provided inside the first shell and protrudes inwardly around the periphery of the first guide surface, and the limiting groove is formed by an end surface of one end of the limiting wall and the inner surface of the first shell.

[0007] Optionally, a limiting rib is provided on the edge of the second guide surface, and the limiting rib smoothly transitions to the second guide surface at one end close to the limiting protrusion, and the other end of the limiting rib presses against the end surface of the other end of the limiting wall when the first shell and the second shell are buckled together.

[0008] Optionally, the side surface of the limiting protrusion facing the flow channel and the side surface of the limiting wall facing the flow channel transition smoothly and extend along the same spiral trajectory.

[0009] Optionally, the cross-section of the flow channel gradually increases from an end away from the water outlet pipe to an end close to the water outlet pipe.

[0010] Optionally, the second guide surface includes a plane area and a curved surface area, the curved surface area corresponds to an end of the first guide surface close to the water outlet pipe, and when the first shell and the second shell are buckled together, the flow channel enclosed by the curved surface area and the first guide surface smoothly transitions to the inner hole of the water outlet pipe.

[0011] Optionally, an edge of a cross section of the flow channel enclosed by the arc surface area and the first guide surface is arc-shaped.

[0012] Optionally, the spiral center of the first guide surface is eccentrically arranged relative to the center of the first shell, the second guide surface is annular and coaxially arranged with the central axis of the first shell, the water inlet pipe is coaxially arranged with the central axis of the first shell and is connected to the flow channel, and the water outlet pipe is perpendicular to the central axis of the first shell and is connected to the flow channel.

[0013] Optionally, the cross-section of the inner hole of the water outlet pipe is elliptical.

[0014] Optionally, the edge of the second shell is provided with a first step surface along its circumference, and the edge of the first shell is provided with a second step surface along its circumference, and the first step surface and the second step surface cooperate with each other to ensure that the first shell and the second shell are coaxially arranged.

[0015] Compared with the prior art, the above one or more technical solutions in the noise reduction structure of a diversion pump provided by an embodiment of the utility model have at least one of the following technical effects: during assembly, the limiting groove can limit the setting angle of the second shell relative to the first shell by cooperating with the limiting protrusion, thereby realizing the determination of the relative position of the second shell and the first shell when they are buckled with each other, preventing the assembly workers from installing the second shell out of position. After accurate alignment, the first shell and the second shell can realize accurate alignment of the water outlet pipe and the flow channel, thereby preventing the accumulation of gas at the docking position of the water outlet pipe and the flow channel due to misalignment, thereby preventing cavitation from occurring inside the diversion pump, improving the quality and service life of the pump body, and reducing noise and abnormal sounds. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 This is a schematic structural diagram of the second housing in the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the first shell and the second shell in the present invention in a buckled state;

[0019] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction;

[0020] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure along the middle BB direction;

[0021] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at C in the middle;

[0022] Figure 6 This is a schematic structural diagram of the first shell in the present utility model;

[0023] Figure 7 It is a structural diagram of the limiting protrusion and the limiting groove in the present invention under the cooperation state.

[0024] Among them, the reference numerals in the figures are:

[0025] The first shell 100, the first guide surface 110, the limiting wall 120, the reinforcing rib 121, the muffler chamber 122, the limiting groove 130, and the second step surface 140;

[0026] The second housing 200, the second guide surface 210, the flat area 211, the arcuate area 212, the limiting ribs 213, the limiting protrusions 220, and the first step surface 230;

[0027] Runner 300;

[0028] Water inlet pipe 400;

[0029] Water outlet pipe 500;

[0030] Impeller 600. DETAILED DESCRIPTION

[0031] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0032] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0034] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0035] like Figures 1 to 7As shown, the utility model discloses a noise reduction structure of a diversion pump, which includes a first housing 100 , a second housing 200 and an impeller 600 .

[0036] Among them, the first shell 100 is provided with a first guide surface 110, an inlet pipe 400 and an outlet pipe 500, the second shell 200 is buckled and docked with the first shell 100, and the second shell 200 is provided with a second guide surface 210. When the first shell 100 and the second shell 200 are buckled with each other, the second guide surface 210 and the first guide surface 110 enclose a flow channel 300. The impeller 600 is rotatably arranged in the first shell 100 to introduce water in the inlet pipe 400 into the flow channel 300 and pump the water in the flow channel 300 out of the outlet pipe 500. A limiting protrusion 220 is provided on the second shell 200, and a limiting groove 130 is provided on the first shell 100. The limiting protrusion 220 can cooperate with the limiting groove 130 when the first shell 100 and the second shell 200 are buckled with each other. The limiting groove 130 can limit the setting angle of the second shell 200 relative to the first shell 100.

[0037] It can be understood that during assembly, the limiting groove 130 can limit the setting angle of the second shell 200 relative to the first shell 100 by cooperating with the limiting protrusion 220, thereby realizing the determination of the relative position of the second shell 200 and the first shell 100 when they are buckled into each other, preventing the assembly workers from installing the second shell 200 in a misplaced manner. After accurate alignment, the first shell 100 and the second shell 200 can realize the accurate alignment of the water outlet pipe 500 and the flow channel 300, thereby preventing the accumulation of gas at the docking position of the water outlet pipe 500 and the flow channel 300 due to misalignment, thereby preventing cavitation from occurring inside the diversion pump, improving the quality and service life of the pump body, and reducing noise and abnormal sounds.

[0038] like Figure 3 and Figure 6 As shown, in one embodiment of the present invention, a section of limiting wall 120 is provided inwardly protruding from the interior of the first shell 100 around the periphery of the first guide surface 110. The limiting groove 130 is formed by the end surface of one end of the limiting wall 120 and the inner surface of the first shell 100. During installation, the second shell 200 is fastened to the first shell 100, and the limiting protrusion 220 is pressed against the end surface of the limiting wall 120. It should be noted that the limiting groove 130 is formed by the limiting wall 120 and the first shell 100, but this does not mean that the limiting groove 130 is a closed structure. On the contrary, in order for the limiting protrusion 220 to be placed in the limiting groove 130, at least two to three sides of the limiting groove 130 must be open.

[0039] like Figure 1As shown, in one embodiment of the present invention, a limiting rib 213 is provided protruding from the edge of the second guide surface 210. The limiting rib 213 smoothly transitions with the second guide surface 210 at one end near the limiting protrusion 220. The inner side surface of the limiting rib 213 is used to cooperate with the second guide surface 210 to form a curved surface area 212. The other end of the limiting rib 213 abuts against the end surface of the other end of the limiting wall 120 when the first shell 100 and the second shell 200 are interlocked. In summary, after the second shell 200 is interlocked with the first shell 100, the front and rear ends of the limiting wall 120 cooperate with the limiting rib 213 and the limiting protrusion 220, so that the relative position of the second shell 200 and the first shell 100 can be quickly determined, which can prevent the assembler from installing the parts incorrectly.

[0040] It should be noted that the end-to-end connection between the limiting wall 120, the limiting rib 213, and the limiting protrusion 220 perfectly forms the pump body flow channel structure. The close fit between the first shell 100 and the second shell 200 not only helps to reduce vibration and noise during pump operation, but also reduces friction between components, thereby reducing failure rates and improving overall stability. The two-part flow channel structure not only prevents mistakes during assembly, but also facilitates disassembly, facilitating cleaning of the pump body during maintenance and overhaul, maintaining the hygiene and performance of the equipment.

[0041] In one embodiment of the present invention, the side of the limiting protrusion 220 facing the flow channel 300 and the side of the limiting wall 120 facing the flow channel 300 have a smooth transition and extend along the same spiral trajectory, that is, the side of the flow channel 300 can be formed by combining the limiting wall 120 and the limiting protrusion 220. The flow channel is enclosed by the existing structure, which can simplify the structure and reduce the volume of the diversion pump.

[0042] It should be noted that, based on the principles of fluid mechanics, the first guide surface 110 of the present invention is designed to extend along a spiral trajectory, ensuring a stable flow field before the fluid enters the outlet pipe, thereby reducing eddy currents and impact losses. The aforementioned spiral trajectory is a plane spiral trajectory. A plane spiral refers to a trajectory formed by a moving point in a plane polar coordinate system where the polar radius ρ increases (or decreases) proportionally with the polar angle θ.

[0043] like Figure 3 As shown, in one embodiment of the present invention, the cross section of the flow channel 300 gradually increases from the end away from the outlet pipe 500 to the end close to the outlet pipe 500, which can ensure that the fluid can smoothly transition in the flow channel and reduce resistance loss. Figure 3 and Figure 7 In FIG. 3 , the direction of each arrow is a schematic diagram of the flow path of the fluid entering the flow channel 300 .

[0044] like Figure 1 As shown, in one embodiment of the present invention, the second guide surface 210 includes a flat region 211 and a curved region 212. The curved region 212 corresponds to the end of the first guide surface 110 near the outlet pipe 500. When the first shell 100 and the second shell 200 are interlocked, the curved region 212 and the first guide surface 110 together enclose a smooth transition between the flow channel 300 and the inner bore of the outlet pipe 500. By setting the inner diameters of the flow channel 300 and the outlet pipe 500 to be consistent at the joint, gas accumulation in the eccentric reducer can be prevented, thereby preventing gas from entering the diversion pump and causing cavitation, thereby preventing performance degradation or even damage to the diversion pump.

[0045] Specifically, if Figure 5 As shown, in one embodiment of the present invention, the edge of the cross section of the flow channel 300 enclosed by the arc surface area 212 and the first guide surface 110 is arc-shaped.

[0046] In one embodiment of the present invention, the spiral center of the first guide surface 110 is eccentrically arranged relative to the center of the first shell 100, the second guide surface 210 is annular and coaxially arranged with the central axis of the first shell 100, the water inlet pipe 400 is coaxially arranged with the central axis of the first shell 100 and is connected to the flow channel 300, and the water outlet pipe 500 is perpendicular to the central axis of the first shell 100 and is connected to the flow channel 300.

[0047] In one embodiment of the present invention, the inner hole of the water outlet pipe 500 has an elliptical cross-section. The cross-sectional area of ​​the elliptical inner hole is larger than that of a circular inner hole of the same circumference, which allows water to flow more smoothly through the pipe, thereby improving drainage capacity and its pressure resistance is also stronger than that of a circular inner hole.

[0048] In one embodiment of the present invention, a first step surface 230 is provided on the edge of the second shell 200 along its circumference, and a second step surface 140 is provided on the edge of the first shell 100 along its circumference. The first step surface 230 and the second step surface 140 cooperate with each other to ensure that the first shell 100 and the second shell 200 are coaxially arranged.

[0049] like Figure 3 and Figure 6 As shown, in one embodiment of the present invention, the interior of the limiting wall 120 can be designed as a hollow structure and equipped with multiple reinforcing ribs 121. These reinforcing ribs 121 are spaced apart and divide the interior of the limiting wall 120 into multiple silencer chambers 122. The silencer chambers 122 can block the transmission of some noise, while the reinforcing ribs 121 ensure the structural support of the limiting wall 120 and the stability of the overall structure of the diversion pump. Furthermore, the inner sidewall of the limiting wall 120 can guide the flow direction of the fluid, reduce turbulence, and improve the operating efficiency of the pump.

[0050] like Figure 1 and Figure 3 As shown, in one embodiment of the present invention, the spiral center of the first guide surface 110 is eccentrically disposed relative to the center of the first housing 100 to form a first guide surface 110 that gradually widens from narrow to wide within the first housing 100. The second guide surface 210 is annular and coaxially disposed with the central axis of the first housing 100 to facilitate coaxial installation of the first housing 100 and the second housing 200. It should be noted that the width of the second guide surface 210 can be set to be greater than or equal to the maximum width of the first guide surface 110, so that the first guide surface 110 and the second guide surface 210 can enclose a flow channel 300 with a gradually increasing cross-sectional width. It can be understood that the area of ​​the second guide surface 210 corresponding to the first guide surface 110 in the width direction can be used to enclose the flow channel 300 together with the first guide surface 110 and the inner side surface of the limiting wall 120, and the area of ​​the second guide surface 210 not corresponding to the first guide surface 110 in the width direction can be used to cover the limiting wall 120 to block the silencer chamber 122 in the limiting wall 120.

[0051] The above description further details the present invention in conjunction with specific preferred embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. A person skilled in the art of the present invention will appreciate that its architecture is flexible and adaptable, allowing for the development of a series of products without departing from the present invention's concept. Simple deductions or substitutions should be considered within the scope of patent protection for the present invention as defined by the submitted claims.

Claims

1. A noise reduction structure for a diversion pump, characterized in that: include: A first shell having a first guide surface, a water inlet pipe and a water outlet pipe provided therein; a second shell, engaging with and docking with the first shell, the second shell being provided with a second flow-guiding surface, and when the first shell and the second shell are engaged with each other, the second flow-guiding surface and the first flow-guiding surface enclose a flow channel; an impeller rotatably disposed in the first housing, for introducing water in the water inlet pipe into the flow channel and pumping the water in the flow channel out through the water outlet pipe; In which, a limiting protrusion is provided on the second shell, and a limiting groove is provided on the first shell. The limiting protrusion can cooperate with the limiting groove when the first shell and the second shell are buckled with each other, and the limiting groove can limit the setting angle of the second shell relative to the first shell.

2. The noise reduction structure of the diversion pump according to claim 1, characterized in that: A limiting wall is provided inside the first shell and protrudes inwardly around the periphery of the first guide surface. The limiting groove is formed by an end surface of one end of the limiting wall and the inner surface of the first shell.

3. The noise reduction structure of the diversion pump according to claim 2, characterized in that: A limiting rib is provided on the edge of the second guide surface. The limiting rib smoothly transitions to the second guide surface at one end close to the limiting protrusion. The other end of the limiting rib presses against the end surface of the other end of the limiting wall when the first shell and the second shell are buckled together.

4. The noise reduction structure of the diversion pump according to claim 2, characterized in that: The side surface of the limiting protrusion facing the flow channel and the side surface of the limiting wall facing the flow channel have a smooth transition and extend along the same spiral track.

5. The noise reduction structure of the diversion pump according to claim 1, characterized in that: The cross section of the flow channel gradually increases from an end away from the water outlet pipe to an end close to the water outlet pipe.

6. The noise reduction structure of the diversion pump according to claim 1, characterized in that: The second guide surface includes a flat area and a curved area. The curved area corresponds to an end of the first guide surface close to the water outlet pipe. When the first shell and the second shell are buckled together, the flow channel enclosed by the curved area and the first guide surface smoothly transitions to the inner hole of the water outlet pipe.

7. The noise reduction structure of the diversion pump according to claim 6, characterized in that: The edge of the cross section of the flow channel enclosed by the arc surface area and the first guide surface is arc-shaped.

8. The noise reduction structure of the diversion pump according to claim 1, characterized in that: The spiral center of the first guide surface is eccentrically arranged relative to the center of the first shell, the second guide surface is annular and coaxially arranged with the central axis of the first shell, the water inlet pipe is coaxially arranged with the central axis of the first shell and is connected to the flow channel, and the water outlet pipe is perpendicular to the central axis of the first shell and is connected to the flow channel.

9. The noise reduction structure of a diversion pump according to any one of claims 1 to 6, characterized in that: The cross section of the inner hole of the water outlet pipe is elliptical.

10. The noise reduction structure of a diversion pump according to any one of claims 1 to 6, characterized in that: The edge of the second shell is provided with a first step surface along its circumference, and the edge of the first shell is provided with a second step surface along its circumference. The first step surface and the second step surface cooperate with each other to ensure that the first shell and the second shell are coaxially arranged.

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