A diversion pump

Abstract

The present invention belongs to the technical field of water pumps, and particularly relates to a diversion pump, comprising: a front cover, which is internally provided with a first flow channel surface extending along a spiral trajectory; a rear shell, which is provided with a second flow channel surface, and the second flow channel surface and the first flow channel surface enclose a flow channel; a water inlet pipe, which is arranged on the front cover, is coaxially arranged with the central axis of the front cover and is communicated with the flow channel; a water outlet pipe, which is arranged on the front cover, is perpendicularly arranged with the central axis of the front cover and is communicated with the flow channel, and the cross section of the flow channel gradually increases from the end far away from the water outlet pipe to the end close to the water outlet pipe; an impeller, which is used for introducing the water in the water inlet pipe into the flow channel and pumping the water in the flow channel out through the water outlet pipe; a sound-absorbing wall, which is located in the front cover and is arranged around the periphery of the first flow channel surface, the sound-absorbing wall is hollow inside and is provided with a plurality of reinforcing ribs at intervals, and the plurality of reinforcing ribs separate the inside of the sound-absorbing wall and form a plurality of sound-absorbing chambers. The present invention can effectively absorb and reduce noise, reduce turbulence, and improve the operation efficiency of the pump.

Description

Technical Field

[0001] The present invention belongs to the technical field of water pumps, and particularly relates to a diversion pump. Background Art

[0002] Diversion pumps are widely used in industry, especially in fields such as sewage treatment, irrigation, and waterway control. The working principle of a diversion pump mainly depends on its internal impeller and diversion structure. When the motor drives the impeller to rotate, the liquid is sucked into the pump body, obtains energy under the action of the impeller, and then is transported to the required position along the diversion structure. Specifically, the diversion pump uses centrifugal force to suck the medium from the inlet pipe into the pump body, and then rotates the medium out along the guide cylinder under the action of the high-speed rotating impeller to achieve the purpose of transportation or circulation.

[0003] The existing diversion structure of the diversion pump is relatively thin, and relatively large noise will be generated during the process of sucking the liquid into the pump body, and the existing pump housing cannot isolate the noise well. Summary of the Invention

[0004] The purpose of the present invention is to provide a diversion pump, aiming to solve the technical problem of relatively large noise in the working process of the diversion pump in the prior art.

[0005] To achieve the above purpose, a diversion pump provided by an embodiment of the present invention includes: a front cover, internally provided with a first flow path surface extending along a spiral trajectory; a rear housing, buckled and docked with the front cover, the rear housing is provided with a second flow path surface, when the front cover and the rear housing are buckled with each other, the second flow path surface and the first flow path surface enclose a flow path; a water inlet pipe, arranged on the front cover, coaxially arranged with the central axis of the front cover and communicated with the flow path; a water outlet pipe, arranged on the front cover, perpendicularly arranged with the central axis of the front cover and communicated with the flow path, the cross-section of the flow path gradually increases from one end far away from the water outlet pipe to one end close to the water outlet pipe; an impeller, rotatably arranged in the front housing, used to introduce the water in the water inlet pipe into the flow path and pump the water in the flow path out through the water outlet pipe; a sound insulation wall, located in the front cover and arranged around the periphery of the first flow path surface, the sound insulation wall is hollow inside and provided with a plurality of reinforcing ribs at intervals, and the plurality of reinforcing ribs separate the inside of the sound insulation wall and form a plurality of sound insulation chambers.

[0006] Optionally, the spiral center of the first flow path surface is eccentrically arranged relative to the center of the front cover, and the second flow path surface is annular and coaxially arranged with the central axis of the front cover.

[0007] Optionally, a limiting protrusion is provided on the rear shell, and a limiting groove is provided on the front cover. The limiting protrusion can cooperate with the limiting groove when the front cover and the rear shell are buckled with each other, and the limiting groove can limit the rotation of the rear shell in one direction around the axis of the rear shell.

[0008] Optionally, the limiting groove is formed by jointly enclosing the bottom surface of the front cover, the side wall of the front cover, and the end surface of one end of the sound insulation wall.

[0009] Optionally, a section of limiting rib is convexly provided at the edge of the second flow channel surface. The limiting rib is smoothly transitioned with the second flow channel surface at one end close to the limiting protrusion, and the other end of the limiting rib abuts against the other end of the sound insulation wall when the front cover and the rear shell are buckled with each other, and the other end of the limiting rib can limit the rotation of the rear shell in the other direction around the axis of the rear shell.

[0010] Optionally, the side surface of the limiting protrusion facing the flow channel direction and the side wall of the sound insulation wall facing the flow channel direction are smoothly transitioned and extend along the same spiral track.

[0011] Optionally, the second flow channel surface includes a planar region and an arc-shaped region. The arc-shaped region corresponds to one end of the first flow channel surface close to the water outlet pipe. When the front cover and the rear shell are buckled with each other, the flow channel jointly enclosed by the arc-shaped region and the first flow channel surface is smoothly transitioned with the inner hole of the water outlet pipe.

[0012] Optionally, the edge of the cross section of the flow channel enclosed by the arc-shaped region and the first flow channel surface is arc-shaped.

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

[0014] Optionally, a first step surface is provided along the circumferential direction of the edge of the rear shell, and a second step surface is provided along the circumferential direction of the edge of the front cover. The first step surface and the second step surface cooperate with each other to ensure that the front cover and the rear shell are coaxially arranged.

[0015] Compared with the prior art, one or more of the above technical solutions in a diversion pump provided by an embodiment of the present invention at least have the following technical effects: In the diversion pump of the present invention, since a sound insulation wall structure is provided inside the front cover, noise can be effectively absorbed and reduced during operation, achieving the purpose of significant noise reduction. Specifically, the inside of the sound insulation wall is a hollow structure, and a plurality of reinforcing ribs are provided. These reinforcing ribs are arranged at intervals and separate the inside of the sound insulation wall into a plurality of sound insulation chambers. The sound insulation chambers can block the propagation of part of the noise, and the reinforcing ribs can ensure the support strength of the sound insulation wall structure and the stability of the overall structure of the diversion pump. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the present invention;

[0018] Figure 2 For Figure 1 It is a schematic cross-sectional structure diagram in the A-A direction in

[0019] Figure 3 For Figure 1 It is a schematic cross-sectional structure diagram in the B-B direction in

[0020] Figure 4 For Figure 3 It is a schematic diagram of the local enlarged structure at C in

[0021] Figure 5 It is a schematic structural diagram of the rear shell in the present invention;

[0022] Figure 6 It is a schematic structural diagram of the front cover in the present invention;

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

[0024] Among them, the reference numerals in the drawings are as follows:

[0025] Front cover 100, first flow channel surface 110, sound-absorbing wall 120, reinforcing rib 121, sound-absorbing chamber 122, limiting groove 130, second step surface 140;

[0026] Rear shell 200, second flow channel surface 210, flat area 211, arc area 212, limiting rib 213, limiting protrusion 220, first step surface 230;

[0027] Flow channel 300;

[0028] Water inlet pipe 400;

[0029] Water outlet pipe 500;

[0030] Impeller 600. Detailed implementation manners

[0031] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended 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 orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0034] In the embodiments of the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0035] As Figures 1 to 7 shown, the present invention discloses a diversion pump, including a front cover 100, a rear housing 200, a water inlet pipe 400, a water outlet pipe 500, an impeller 600 and a sound-absorbing wall 120.

[0036] Inside the front cover 100, there is a first flow channel surface 110 extending along a spiral trajectory. The rear shell 200 is buckled and docked with the front cover 100. The rear shell 200 is provided with a second flow channel surface 210. When the front cover 100 and the rear shell 200 are buckled with each other, the second flow channel surface 210 and the first flow channel surface 110 enclose a flow channel 300. The water inlet pipe 400 is arranged on the front cover 100, coaxially arranged with the central axis of the front cover 100 and connected to the flow channel 300. The water outlet pipe 500 is arranged on the front cover 100, perpendicularly arranged with the central axis of the front cover 100 and connected to the flow channel 300. The cross-section of the flow channel 300 gradually increases from the end far away from the water outlet pipe 500 to the end close to the water outlet pipe 500. The impeller 600 is rotatably arranged inside the front shell 100 to introduce the water in the water inlet pipe 400 into the flow channel 300 and pump the water in the flow channel 300 out through the water outlet pipe 500. The sound-absorbing wall 120 is located inside the front cover 100 and arranged around the periphery of the first flow channel surface 110. The inside of the sound-absorbing wall 120 is hollow and is provided with a plurality of reinforcing ribs 121 at intervals. The plurality of reinforcing ribs 121 separate the inside of the sound-absorbing wall 120 and form a plurality of sound-absorbing chambers 122.

[0037] It can be understood that for the diversion pump in the present invention, due to the structure of the sound-absorbing wall 120 arranged inside the front cover 100, it can effectively absorb and reduce noise during operation, achieving the purpose of significant noise reduction. Specifically, the inside of the sound-absorbing wall 120 is a hollow structure and is provided with a plurality of reinforcing ribs 121. These reinforcing ribs 121 are arranged at intervals and separate the inside of the sound-absorbing wall 120 into a plurality of sound-absorbing chambers 122. The sound-absorbing chambers 122 can block the propagation of part of the noise, and the reinforcing ribs 121 can ensure the supporting strength of the structure of the sound-absorbing wall 120 and the stability of the overall structure of the diversion pump.

[0038] In addition, the cross-section of the flow channel 300 is designed to gradually increase from the end far away from the water outlet pipe 500 to the end close to the water outlet pipe 500, which can ensure that the fluid can smoothly transition in the flow channel and reduce the resistance loss. In Figure 2 and Figure 7 the directions of each arrow are the schematic diagrams of the flow path of the fluid entering the flow channel 300.

[0039] It should be noted that according to the principle of fluid mechanics, the first flow channel surface 110 in the present invention is designed to extend along a spiral trajectory, which can ensure that a stable flow field can be formed before the fluid enters the water outlet pipe, reducing the eddy current and impact loss. Among them, the above spiral trajectory is a planar spiral trajectory. A planar spiral refers to a trajectory formed by a moving point in a plane polar coordinate system, if the polar radius ρ increases (or decreases) in proportion to the increase of the polar angle θ.

[0040] Such as Figure 2 and Figure 4As shown, in one embodiment of the present invention, the spiral center of the first flow channel surface 110 is eccentrically arranged relative to the center of the front cover 100 to form a first flow channel surface 110 that gradually widens from narrow to wide inside the front cover 100. The second flow channel surface 210 is annular and coaxially arranged with the central axis of the front cover 100 so that the front cover 100 and the rear housing 200 can be coaxially installed. It should be noted that the width of the second flow channel surface 210 can be set to be greater than or equal to the maximum value of the width of the first flow channel surface 110, so that the first flow channel surface 110 and the second flow channel 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 flow channel surface 210 corresponding to the first flow channel surface 110 in the width direction can be used to jointly enclose the flow channel 300 with the first flow channel surface 110 and the inner side surface of the sound insulation wall 120. The area of the second flow channel surface 210 that does not correspond to the first flow channel surface 110 in the width direction can be used to cover the sound insulation wall 120 to block the sound insulation chamber 122 inside the sound insulation wall 120.

[0041] Referring to Figures 5 to 7 , in one embodiment of the present invention, a limiting protrusion 220 is provided on the rear housing 200, and a limiting groove 130 is provided on the front cover 100. The limiting protrusion 220 can cooperate with the limiting groove 130 when the front cover 100 and the rear housing 200 are buckled with each other. The limiting groove 130 can limit the rotation of the rear housing 200 in one direction around the axis of the rear housing 200, thereby realizing the determination of the relative position when the rear housing 200 and the front cover 100 are buckled with each other, and preventing the assembly worker from misinstalling the rear housing 200.

[0042] Specifically, as Figure 6 shown, in one embodiment of the present invention, the limiting groove 130 is formed by jointly enclosing the bottom surface of the front cover 100, the side wall of the front cover 100, and the end surface of one end of the sound insulation wall 120. During installation, the rear housing 200 is buckled with the front cover 100, and the limiting protrusion 220 abuts against one end of the above-mentioned sound insulation wall 120.

[0043] Furthermore, as Figure 5 and Figure 7As shown, in one embodiment of the present invention, a section of limiting rib 213 is convexly provided at the edge of the second flow channel surface 210. One end of the limiting rib 213 close to the limiting protrusion 220 is smoothly transitioned with the second flow channel surface 210. The inner side surface of the limiting rib 213 is used to cooperate with the second flow channel surface 210 to form an arc surface area 212. The other end of the limiting rib 213 abuts against the other end of the sound insulation wall 120 when the front cover 100 and the rear housing 200 are buckled together. The other end of the limiting rib 213 can limit the rotation of the rear housing 200 in the other direction around the axis of the rear housing 200. In summary, after buckling the rear housing 200 and the front cover 100 together, the head and tail ends of the sound insulation wall 120 are smoothly matched with the limiting rib 213 and the limiting protrusion 220, so that the relative positions of the rear housing 200 and the front cover 100 can be quickly determined, and it can avoid the installation misalignment of the assembly workers.

[0044] It should be noted that through the head-to-tail connection structure of the sound insulation wall 120, the limiting rib 213 and the limiting protrusion 220, it can perfectly fit to form the pump body flow channel structure. The tight fit of the front cover 100 and the rear housing 200 not only helps to reduce the vibration and noise during the operation of the pump body, but also can reduce the friction between components, playing the role of reducing the failure rate and improving the overall stability. The flow channel structure composed of two parts can not only play the role of anti-misassembly during assembly, but also be convenient for disassembly, facilitating the cleaning of the inside of the pump body during maintenance and overhaul, and maintaining the hygiene and performance of the equipment.

[0045] As Figure 7 shown, in one embodiment of the present invention, the side surface of the limiting protrusion 220 facing the flow channel 300 is smoothly transitioned with the side wall of the sound insulation wall 120 facing the flow channel 300 and extends along the same spiral trajectory. That is, the side surface of the flow channel 300 can be formed by the common combination of the sound insulation wall 120 and the limiting protrusion 220. Enclosing the flow channel through the existing structure can simplify the structure and reduce the volume of the diversion pump.

[0046] As Figure 5 shown, in one embodiment of the present invention, the second flow channel surface 210 includes a planar area 211 and an arc surface area 212. The arc surface area 212 corresponds to one end of the first flow channel surface 110 close to the water outlet pipe 500. When the front cover 100 and the rear housing 200 are buckled together, the flow channel 300 enclosed by the arc surface area 212 and the first flow channel surface 110 is smoothly transitioned with the inner hole of the water outlet pipe 500. By setting the inner diameters of the flow channel 300 and the water outlet pipe 500 to be the same at the butt joint position, it is possible to prevent the accumulation of gas in the eccentric reducer, thereby avoiding the entry of gas into the diversion pump and causing cavitation phenomenon, and preventing the performance of the diversion pump from deteriorating or even being damaged.

[0047] Furthermore, as Figure 4As shown, in one embodiment of the present invention, the edge of the cross-section of the flow channel 300 formed by the arc surface area 212 and the first flow channel surface 110 is arc-shaped. The arc-shaped cross-section of the flow channel 300 facilitates smooth transition with the inner surface of the water outlet pipe 500.

[0048] In one embodiment of the present invention, the cross-section of the inner hole of the water outlet pipe 500 is oval. The cross-sectional area of the oval inner hole is larger than that of a circular inner hole with the same perimeter. This enables water to flow through the pipe more smoothly, thereby improving the drainage capacity, and its compressive resistance is also stronger than that of a circular inner hole.

[0049] In one embodiment of the present invention, a first stepped surface 230 is provided along the circumferential direction of the edge of the rear shell 200, and a second stepped surface 140 is provided along the circumferential direction of the edge of the front cover 100. The first stepped surface 230 and the second stepped surface 140 cooperate with each other to ensure that the front cover 100 and the rear shell 200 are coaxially arranged.

[0050] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, its architecture form can be flexibly changed, and a series of products can be derived. Just making several simple deductions or substitutions should be regarded as belonging to the patent protection scope determined by the claims submitted for the present invention.

Claims

1. A diversion pump, characterized in that: include: The front cover has a first flow channel surface extending along a spiral track provided therein; A rear shell is buckled and docked with the front cover, and the rear shell is provided with a second flow channel surface. When the front cover and the rear shell are buckled with each other, the second flow channel surface and the first flow channel surface enclose a flow channel; A water inlet pipe is arranged on the front cover, is coaxially arranged with the central axis of the front cover and is connected with the flow channel; A water outlet pipe is arranged on the front cover, is arranged perpendicular to the central axis of the front cover and is connected to the flow channel, and 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; an impeller rotatably disposed in the front cover, 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; A sound-absorbing wall is located in the front cover and is arranged around the periphery of the first flow channel surface. The sound-absorbing wall is hollow and has a plurality of reinforcing ribs arranged at intervals. The plurality of reinforcing ribs separate the interior of the sound-absorbing wall and form a plurality of sound-absorbing chambers. A limiting protrusion is provided on the rear shell, and a limiting groove is provided on the front cover, and the limiting protrusion can cooperate with the limiting groove when the front cover and the rear shell are buckled with each other, and the limiting groove can limit the rotation of the rear shell in one direction around the axis of the rear shell, and the limiting groove is enclosed by the bottom surface of the front cover, the side wall of the front cover and the end surface of one end of the sound-absorbing wall, and a section of limiting rib is protruding from the edge of the second flow channel surface, and the limiting rib smoothly transitions with the second flow channel surface at one end close to the limiting protrusion, and the other end of the limiting rib abuts against the other end of the sound-absorbing wall when the front cover and the rear shell are buckled with each other, and the other end of the limiting rib can limit the rotation of the rear shell in the other direction around the axis of the rear shell.

2. The diversion pump according to claim 1, characterized in that: The spiral center of the first flow channel surface is eccentrically arranged relative to the center of the front cover, and the second flow channel surface is annular and coaxially arranged with the central axis of the front cover.

3. The diversion pump according to claim 1, characterized in that: The side surface of the limiting protrusion facing the flow channel and the side wall of the muffler wall facing the flow channel are smoothly transitioned and extend along the same spiral track.

4. The diversion pump according to claim 1, characterized in that: The second flow channel surface includes a plane area and a curved area, the curved area corresponds to an end of the first flow channel surface close to the water outlet pipe, and when the front cover and the rear shell are buckled together, the flow channel enclosed by the curved area and the first flow channel surface has a smooth transition with the inner hole of the water outlet pipe.

5. The diversion pump according to claim 4, characterized in that: The edge of the cross section of the flow channel enclosed by the arc surface area and the first flow channel surface is arc-shaped.

6. The diversion pump according to any one of claims 1 to 5, characterized in that: The cross section of the inner hole of the water outlet pipe is elliptical.

7. The diversion pump according to any one of claims 1 to 5, characterized in that: The edge of the rear shell is provided with a first step surface along its circumference, and the edge of the front cover 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 front cover and the rear shell are coaxially arranged.

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