Front shell structure of diversion pump

Abstract

The utility model belongs to the technical field of water pumps, and particularly relates to a front shell structure of a diversion pump, which is used for being buckled and butted with a rear shell, the rear shell is provided with a second runner surface, the second runner surface comprises a plane area and an arc surface area, and the front shell structure of the diversion pump comprises a body; the first runner surface extends along a spiral track, and a runner is defined by the second runner surface and the first runner surface; the water inlet pipe and the central axis of the body are coaxially arranged, and the water inlet pipe is communicated with the runner; the water outlet pipe is perpendicular to the central axis of the body and communicated with the flow channel, and the section of the flow channel is gradually increased from the end away from the water outlet pipe to the end close to the water outlet pipe; when the front shell and the rear shell are buckled with each other, the cambered surface area corresponds to the end, close to the water outlet pipe, of the first flow channel face, and a flow channel jointly defined by the cambered surface area and the first flow channel face is in smooth transition with an inner hole of the water outlet pipe. Cavitation in the flow guide pump can be prevented, and performance reduction and even damage of the flow guide pump can be prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps, and in particular relates to a front shell structure of 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 apertures of the flow channel and the water outlet inside the existing diversion pump are often inconsistent, or the flow channel and the water outlet are staggered at an offset angle, which will cause gas to accumulate at the eccentric dislocation and then cause cavitation, affecting the quality of the pump body. Utility Model Content

[0004] The utility model aims to provide a diversion pump, aiming to solve the technical problem in the prior art that the flow channel and the water outlet of the diversion pump are easily misaligned.

[0005] To achieve the above-mentioned purpose, the embodiment of the present invention provides a front shell structure of a diversion pump, which is used to be buckled and docked with the rear shell, and the rear shell is provided with a second flow channel surface, and the second flow channel surface includes a flat area and a curved area. The front shell structure of the diversion pump includes: a body; a first flow channel surface, which is provided on the body and extends along a spiral trajectory. When the front shell and the rear shell are buckled with each other, the second flow channel surface and the first flow channel surface enclose a flow channel; an inlet pipe, which is provided on the body, is coaxially arranged with the central axis of the body and is connected to the flow channel; and a water outlet pipe is provided on the body. On the body, it is arranged perpendicular to the central axis of the body and is connected with the flow channel, and the cross-section of the flow channel gradually increases from the end away from the water outlet pipe to the end close to the water outlet pipe; the impeller is rotatably arranged in the body, for introducing the water in the water inlet pipe into the flow channel, and pumping the water in the flow channel out of the water outlet pipe; wherein, when the front shell and the rear shell are buckled with each other, the curved surface area corresponds to the end of the first flow channel surface close to the water outlet pipe, and the flow channel enclosed by the curved surface area and the first flow channel surface has a smooth transition with the inner hole of the water outlet pipe.

[0006] Optionally, the spiral center of the first flow channel surface is eccentrically arranged relative to the center of the body.

[0007] Optionally, the second flow channel surface is annular and is coaxially arranged with the central axis of the body.

[0008] Optionally, an edge of a cross section of the flow channel enclosed by the arc surface area and the first flow channel surface is arc-shaped.

[0009] Optionally, the cross-section of the inner hole of the water outlet pipe is elliptical.

[0010] Optionally, the edge of the rear shell is provided with a first step surface along its circumference, and the edge of the body 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 body and the rear shell are coaxially arranged.

[0011] Optionally, the main body, the water inlet pipe and the water outlet pipe are integrally formed.

[0012] Optionally, a plurality of reinforcing ribs are provided on the outer surface of the body.

[0013] Compared with the prior art, the above-mentioned one or more technical solutions in the front shell structure of a diversion pump provided by an embodiment of the present invention have at least one of the following technical effects: by setting the flow channel and the water outlet pipe to have a smooth transition at the mutual docking position, the docking position of the flow channel and the water outlet pipe will not be eccentrically misaligned. Since the eccentric reducer is prone to accumulate gas at the docking position, the gas entering the diversion pump will cause cavitation. Therefore, the present invention can prevent cavitation from occurring inside the diversion pump and prevent the performance of the diversion pump from being degraded or even damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the present invention when the front shell and the rear shell are in a buckled and docked state;

[0017] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction;

[0018] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure along the middle BB direction;

[0019] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at C in the middle;

[0020] Figure 6 This is a schematic structural diagram of the rear shell in the present invention;

[0021] Figure 7 It is a structural diagram of the limiting protrusion and the limiting groove in the present invention under the cooperation state.

[0022] Among them, the reference numerals in the figures are:

[0023] The main body 100, the first flow channel surface 110, the muffler wall 120, the reinforcing rib 121, the muffler chamber 122, the limiting groove 130, and the second step surface 140;

[0024] The rear housing 200, the second flow channel surface 210, the flat area 211, the arc surface area 212, the limiting ribs 213, the limiting protrusions 220, and the first step surface 230;

[0025] Runner 300;

[0026] Water inlet pipe 400;

[0027] Water outlet pipe 500;

[0028] Impeller 600. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] like Figures 1 to 7 As shown, the utility model discloses a front shell structure of a diversion pump, which is used to be interlocked and docked with the rear shell 200. The rear shell 200 is provided with a second flow channel surface 210, and the second flow channel surface 210 includes a flat area 211 and a curved area 212. The front shell structure of the diversion pump includes a body 100, a first flow channel surface 110, an inlet pipe 400, an outlet pipe 500 and an impeller 600.

[0034] Among them, the first flow channel surface 110 is provided on the main body 100 and extends along a spiral trajectory. When the front shell 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 provided on the main body 100, is coaxially arranged with the central axis of the main body 100 and is connected to the flow channel 300. The water outlet pipe 500 is provided on the main body 100, is perpendicular to the central axis of the main body 100 and is connected to the flow channel 300. The cross section of the flow channel 300 is from away from the water outlet to the One end of the tube 500 gradually increases toward the end close to the water outlet pipe 500, and the impeller 600 is rotatably arranged in the main body 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 of the water outlet pipe 500. When the front shell and the rear shell 200 are buckled into each other, the arc surface area 212 corresponds to the end of the first flow channel surface 110 close to the water outlet pipe 500, and the flow channel 300 enclosed by the arc surface area 212 and the first flow channel surface 110 has a smooth transition with the inner hole of the water outlet pipe 500.

[0035] It can be understood that by setting the flow channel 300 and the water outlet pipe 500 to have a smooth transition at the mutual docking position, the docking position of the flow channel 300 and the water outlet pipe 500 will not be eccentrically misaligned. Since the eccentric reducer is prone to accumulate gas at the docking position, the gas entering the diversion pump will cause cavitation. Therefore, the utility model can prevent cavitation from occurring inside the diversion pump and prevent the performance of the diversion pump from being degraded or even damaged.

[0036] It should be noted that, based on the principles of fluid mechanics, the first flow channel 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 500, thereby reducing eddy currents and impact losses. The aforementioned spiral trajectory is a plane helical trajectory. A plane helical trajectory is defined as 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.

[0037] In addition, the cross section of the flow channel 300 is designed to gradually increase 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 300 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 .

[0038] It is understood that in one embodiment of the present invention, a sound-absorbing wall 120 structure can also be provided within the main body 100 to effectively absorb and reduce noise during the operation of the diversion pump, achieving significant noise reduction. Specifically, the interior of the sound-absorbing wall 120 is hollow and equipped with multiple reinforcing ribs 121. These reinforcing ribs 121 are spaced apart and divide the interior of the sound-absorbing wall 120 into multiple sound-absorbing chambers 122. The sound-absorbing chambers 122 can partially block the transmission of noise, and the reinforcing ribs 121 ensure the support strength of the sound-absorbing wall 120 structure and the stability of the overall structure of the diversion pump.

[0039] like Figure 1 and Figure 3 As shown, in one embodiment of the present invention, the spiral center of the first flow channel surface 110 is eccentrically disposed relative to the center of the body 100 to form the first flow channel surface 110 from narrow to wide inside the body 100 .

[0040] like Figure 6 As shown, in one embodiment of the present invention, the second flow channel surface 210 is annular and is coaxially arranged with the central axis of the body 100 so that the body 100 and the rear shell 200 can be coaxially installed.

[0041] 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 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 is 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 enclose the flow channel 300 together with the first flow channel surface 110 and the inner side surface of the sound-absorbing wall 120, and the area of ​​the second flow channel surface 210 not corresponding to the first flow channel surface 110 in the width direction can be used to cover the sound-absorbing wall 120 to block the sound-absorbing chamber 122 within the sound-absorbing wall 120.

[0042] like 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 curved surface area 212 and the first flow channel surface 110 is curved, and the curved cross section of the flow channel 300 facilitates a smooth transition with the inner surface of the outlet pipe 500.

[0043] Furthermore, in one embodiment of the present invention, the inner hole of the 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.

[0044] like Figure 1 and Figure 6 As shown, in one embodiment of the present invention, the edge of the rear shell 200 is provided with a first step surface 230 along its own circumference, and the edge of the main body 100 is provided with a second step surface 140 along its own circumference. The first step surface 230 and the second step surface 140 cooperate with each other to ensure that the main body 100 and the rear shell 200 are coaxially arranged.

[0045] In one embodiment of the present invention, the main body 100 , the water inlet pipe 400 and the water outlet pipe 500 are integrally formed, and the entire front shell can be cast from a metal material.

[0046] In one embodiment of the present invention, a plurality of reinforcing ribs are disposed on the outer surface of the body 100 to enhance the overall strength of the body 100 .

[0047] Reference Figure 1 、 Figure 6 and Figure 7 In one embodiment of the present invention, a limiting protrusion 220 is provided on the back shell 200, and a limiting groove 130 is provided on the body 100. The limiting protrusion 220 can cooperate with the limiting groove 130 when the body 100 and the back shell 200 are buckled together. The limiting groove 130 can limit the rotation of the back shell 200 in one direction around the axis of the back shell 200, thereby realizing the determination of the relative position of the back shell 200 and the body 100 when they are buckled together, preventing the assembly workers from installing the back shell 200 out of position.

[0048] Specifically, if Figure 1 As shown, in one embodiment of the present invention, the limiting groove 130 is enclosed by the bottom surface of the main body 100, the side wall of the main body 100 and the end surface of one end of the sound-absorbing wall 120. During installation, the rear shell 200 is buckled with the front shell, and the limiting protrusion 220 is pressed against one end of the above-mentioned sound-absorbing wall 120.

[0049] Furthermore, if Figure 6 and Figure 7 As shown, in one embodiment of the present invention, a limiting rib 213 is provided on the edge of the second flow channel surface 210. The limiting rib 213 smoothly transitions with the second flow channel 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 flow channel surface 210 to form a curved surface area 212. The other end of the limiting rib 213 abuts against the other end of the sound-absorbing wall 120 when the main body 100 and the rear shell 200 are engaged with each other. The other end of the limiting rib 213 can limit the rotation of the rear shell 200 in the other direction around the axis of the rear shell 200. In summary, after the rear shell 200 and the main body 100 are engaged, the front and rear ends of the sound-absorbing wall 120 cooperate with the limiting rib 213 and the limiting protrusion 220, so that the relative position of the rear shell 200 and the main body 100 can be quickly determined, which can prevent the assembler from installing the rear shell 200 in the wrong direction.

[0050] It should be noted that the end-to-end connection between the silencer wall 120, the limiting ribs 213, and the limiting protrusions 220 perfectly forms the pump body flow channel structure. The close fit between the main body 100 and the rear shell 200 not only helps to reduce vibration and noise during pump operation, but also reduces friction between components, thereby reducing the failure rate 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.

[0051] like Figure 7 As shown, in one embodiment of the present invention, the side of the limiting protrusion 220 facing the flow channel 300 and the side wall of the silencer 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 silencer 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.

[0052] 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 front housing structure of a diversion pump, used for interlocking and docking with the rear housing, characterized in that: The rear shell is provided with a second flow channel surface, the second flow channel surface includes a flat area and a curved area, and the front shell structure of the diversion pump includes: ontology; a first flow channel surface, provided on the body and extending along a spiral trajectory; when the front shell and the rear shell are engaged with each other, the second flow channel surface and the first flow channel surface enclose a flow channel; a water inlet pipe, provided on the body, coaxially arranged with the central axis of the body and connected with the flow channel; a water outlet pipe, disposed on the body, perpendicular to the central axis of the body and connected to the flow channel, wherein 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 body, 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; Among them, when the front shell and the rear shell are buckled with each other, the arc surface area corresponds to the end of the first flow channel surface close to the water outlet pipe, and the flow channel enclosed by the arc surface area and the first flow channel surface has a smooth transition with the inner hole of the water outlet pipe.

2. The front housing structure of 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 body.

3. The front housing structure of the diversion pump according to claim 2, characterized in that: The second flow channel surface is annular and is coaxially arranged with the central axis of the body.

4. The front housing structure of the diversion pump according to claim 1, 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.

5. The front housing structure of the diversion pump according to any one of claims 1 to 4, characterized in that: The cross section of the inner hole of the water outlet pipe is elliptical.

6. The front housing structure of the diversion pump according to any one of claims 1 to 4, characterized in that: The edge of the rear shell is provided with a first step surface along its circumference, and the edge of the body 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 body and the rear shell are coaxially arranged.

7. The front housing structure of the diversion pump according to any one of claims 1 to 4, characterized in that: The main body, the water inlet pipe and the water outlet pipe are integrally formed.

8. The front housing structure of the diversion pump according to any one of claims 1 to 4, characterized in that: The outer surface of the body is provided with a plurality of reinforcing ribs.

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