Cover plate and pump body assembly

Abstract

The utility model relates to a cover plate and a pump body assembly, the cover plate comprises: an end cover, the center of which is provided with a first outlet; the first baffle is connected to one side of the end cover, the first baffle is in an arc shape, a first inlet is formed in the circumferential direction of the first baffle, and the first outlet is located in the inner side of the first baffle; the first end of the buffer plate is connected to the inner side of the first baffle and is opposite to the first inlet, and the first outlet is located between the first inlet and the first baffle. The buffer plate is arranged and is opposite to the first outlet, when the medium flows into the inner side of the first baffle and impacts the inner side of the first baffle, the buffer plate buffers, guides and shunts the medium, and noise and vibration of the pump can be greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of pump technology, and in particular to a cover plate and a pump body assembly. Background Technology

[0002] The cover plate is installed in the pump body. The medium enters the pump body from the pump body's suction port, passes through the cover plate's outlet, and flows out from the pump body's outlet. The impeller is located downstream of the cover plate and is used to provide the power for the medium flow.

[0003] Under the force of the impeller, the medium flows at a high velocity to the outlet of the cover plate, impacting the arc-shaped plate surrounding the outlet and generating considerable noise. Utility Model Content

[0004] One object of this utility model is to provide a cover plate to at least solve one of the above-mentioned technical problems.

[0005] To achieve the above objectives, the first aspect of this utility model provides a cover plate, comprising:

[0006] End cap, wherein a first outlet is provided at the center of the end cap;

[0007] A first baffle is connected to one side of the end cap. The first baffle is arc-shaped and has a first inlet in its circumferential direction. The first outlet is located inside the first baffle.

[0008] A buffer plate, the first end of which is connected to the inner side of the first baffle and opposite to the first inlet, and the first outlet is located between the first inlet and the first baffle.

[0009] Optionally, the second end of the buffer plate includes an inclined surface, with the first end opposite to the second end;

[0010] The distance between the inclined surface and the first end gradually decreases from the end furthest from the end cap to the end closest to the end cap.

[0011] Optionally, the cover plate further includes a second baffle, one end of which is connected to one end of the first baffle in the circumferential direction, and the second baffle extends outward from and away from the first baffle, extending to the edge of the end cap.

[0012] Optionally, the cover plate further includes a third baffle connected to one side of the end cap. The third baffle is located outside the first baffle, and the medium flows into the first inlet through the space between the first baffle and the second baffle.

[0013] Optionally, the distance between the first baffle and the third baffle gradually decreases along the flow direction of the medium.

[0014] Optionally, the first baffle is arc-shaped, the cross-section of the first outlet is circular, and the first baffle is coaxial with the first outlet.

[0015] Optionally, the end cover has a positioning notch, and the cover plate is configured to be installed in the pump body. The positioning notch enables the cover plate to be positioned relative to the pump body.

[0016] Another objective of this invention is to provide a pump body assembly to at least solve one of the aforementioned technical problems.

[0017] To achieve this objective, the second aspect of this utility model adopts the following technical solution:

[0018] A pump assembly includes a pump body and a cover plate, wherein the pump body has a chamber and the cover plate is disposed within the chamber.

[0019] Optionally, one end of the chamber is open, and a reinforcing rib is provided inside the chamber. The reinforcing rib is located at the connection between the bottom wall and the side wall of the chamber, and the reinforcing rib is connected to both the bottom wall and the side wall. The bottom wall is opposite to the opening.

[0020] Optionally, the pump body assembly further includes an impeller, and the chamber includes a first chamber, wherein the ratio of the impeller diameter D1 to the inner diameter D2 of the first chamber directly opposite the impeller is 3 / 7 to 2 / 3.

[0021] As can be seen from the above, the technical solution provided by this utility model, by setting a buffer plate and making the buffer plate opposite to the first outlet, when the medium flows into the inner side of the first baffle and impacts the inner side of the first baffle, the buffer plate buffers, guides and diverts the medium, which can greatly reduce the noise and vibration of the pump. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the cover plate provided in an embodiment of this utility model;

[0023] Figure 2 This is a structural schematic diagram of the cover plate provided in another embodiment of the present utility model;

[0024] Figure 3 These are the noise simulation curves of a pump using a cover plate with a buffer plate and a pump using a cover plate without a buffer plate, provided by embodiments of this utility model.

[0025] Figure 4 This is a cross-sectional view of the pump body assembly provided in an embodiment of the present utility model;

[0026] Figure 5 This is a schematic diagram of the pump body assembly provided in an embodiment of the present invention;

[0027] Figure 6 This is an exploded view of the pump body assembly provided in this embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the pump body assembly after removing the impeller and cover plate according to an embodiment of the present utility model;

[0029] Figure 8 This is a schematic diagram of the pump body assembly after the impeller is removed, provided in an embodiment of this utility model.

[0030] In the picture:

[0031] 20. Cover plate;

[0032] 1. End cap; 11. First outlet; 12. Positioning notch;

[0033] 2. First baffle; 21. First entrance;

[0034] 3. Buffer plate; 31. First end; 32. Second end; 321. Inclined surface; 322. Plane;

[0035] 4. Second baffle; 5. Third baffle;

[0036] 10. Pump body; 101. Chamber; 1011. First chamber; 1012. Second chamber; 102. Reinforcing rib; 103. Impeller; 104. Second inlet; 105. Second outlet; 107. Positioning protrusion; 108. Bottom wall; 109. Side wall. Detailed Implementation

[0037] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0038] This utility model defines certain directional terms. Unless otherwise stated, the directional terms used, such as "up", "down", "left", "right", "inner", and "outer", are used for ease of understanding and therefore do not constitute a limitation on the scope of protection of this utility model.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] like Figure 1 and Figure 2 As shown, this embodiment provides a cover plate 20 for use in pumps, such as centrifugal pumps, especially canned pumps and circulating pumps, to reduce pump noise.

[0042] The cover plate 20 provided in this embodiment includes an end cover 1, a first baffle 2, and a buffer plate 3. The end cover 1 has a first outlet 11 at its center. For example, the cover plate 20 is configured to be installed inside the pump body 10. The cross-section of the end cover 1 is approximately circular to fit the pump body 10. The first outlet 11 is preferably cylindrical and is coaxially arranged with the end cover 1.

[0043] The first baffle 2 is connected to one side of the end cap 1. The first baffle 2 is arc-shaped and forms a first inlet 21 in its circumferential direction. The first outlet 11 is located inside the first baffle 2. The first end 31 of the buffer plate 3 is connected to the inside of the first baffle 2 and is opposite to the first inlet 21. The first outlet 11 is located between the first inlet 21 and the first baffle 2. The first baffle 2 will not affect the flow of the medium into the first outlet 11.

[0044] After the end cap 1 is installed on the pump body 10, the pump's second inlet 104 is opposite to the outer side of the arc-shaped first baffle 2. The medium flows around the outer side of the first baffle 2 to the first inlet 21 and enters the inner side of the first baffle 2 (e.g., Figure 1The red solid arrow indicates the flow direction of the medium. In this embodiment, by setting a buffer plate 3 and making the buffer plate 3 opposite to the first outlet 11, when the medium flows into the inner side of the first baffle 2 and impacts the inner side of the first baffle 2, the buffer plate 3 buffers, guides, and diverts the medium, which can greatly reduce the noise and vibration of the pump.

[0045] like Figure 3 As shown, noise simulations were performed on a pump using a cover plate 20 with a buffer plate 3 and a pump using a cover plate 20 without a buffer plate 3. The simulation conditions were based on different flow rates of the medium and four directions around the pump. It can be concluded that installing a buffer plate 3 on the cover plate 20 can effectively improve the pump noise and enhance the user experience.

[0046] like Figure 1 and Figure 2 As shown, the second end 32 of the buffer plate 3 includes an inclined surface 321, with the first end 31 opposite to the second end 32. The distance between the inclined surface 321 and the first end 31 gradually decreases from the end furthest from the end cap 1 to the end closest to the end cap 1. The inclined surface 321 facilitates demolding of the cover plate 20.

[0047] In this embodiment, the second end 32 further includes a plane 322, which is located on the side of the inclined surface 321 closer to the end cap 1, and the plane 322 is connected to the inclined surface 321. That is, the plane 322 is closer to the end cap 1 than the inclined surface 321. In other optional embodiments, the second end 32 may not have a plane 322, and the entire second end 32 may be an inclined surface 321.

[0048] For example, the first baffle 2 is arc-shaped, the cross-section of the first outlet 11 is circular, and the first baffle 2 and the first outlet 11 are coaxial.

[0049] like Figure 4 and Figure 5 As shown, this embodiment also provides a pump body assembly, including a pump body 10 and a cover plate 20. The pump body 10 has a chamber 101, and the cover plate 20 is disposed in the chamber 101.

[0050] For example, chamber 101 includes a first chamber 1011, and chamber 101 may also include a second chamber 1012. Specifically, a cover plate 20 is disposed within chamber 101, dividing chamber 101 into a communicating first chamber 1011 and second chamber 1012. Furthermore, the first chamber 1011 and the second chamber 1012 are connected through a first outlet 11, and a first baffle 2 is located within the second chamber 1012.

[0051] The pump body 10 is also provided with a second outlet 105 and a second inlet 104, which are respectively connected to the chamber 101. Specifically, the second inlet 104 is directly connected to the second chamber 1012, and the second outlet 105 is directly connected to the first chamber 1011.

[0052] like Figure 4 and Figure 5 As shown, the pump assembly may also include an impeller 103 located in the first chamber 1011. As the impeller 103 rotates, the medium is drawn into the second chamber 1012 through the second inlet 104. After being guided by the cover plate 20, the medium flows out through the first outlet 11 and into the first chamber 1011, exiting through the second outlet 105 of the first chamber 1011.

[0053] The cross-section of the first chamber 1011 is circular. The ratio of the diameter D1 of the impeller 103 to the inner diameter D2 of the first chamber 1011 directly opposite the impeller 103 is 3 / 7-2 / 3, that is, 3 / 7≤D1 / D2≤2 / 3.

[0054] It is understandable that the diameter D1 of the impeller 103 refers to the diameter at its maximum diameter, and D2 refers to the inner diameter of the first chamber 1011 located radially opposite the maximum diameter of the impeller 103. A D1 / D2 ratio within the aforementioned range can maintain pump noise and vibration at a low level without affecting the pump's hydraulic performance.

[0055] Continue as Figure 2 As shown, optionally, a positioning notch 12 is provided on the end cover 1, which enables the cover plate 20 to be positioned relative to the pump body 10. Figure 7 and Figure 8 As shown, the pump body 10 has a positioning protrusion 107 that complements the positioning notch 12. When the cover plate 20 is in place, the positioning notch 12 and the positioning protrusion 107 complement each other, thereby preventing leakage of liquid in the circumferential direction of the end cover 1. Optionally, the pump body 10 and the cover plate 20 are integrally welded by ultrasonic welding. The pump body 10 can be made of plastic and is integrally injection molded. The pump body 10 has a compact structure, is not easily deformed, has high strength, and is lightweight. The cover plate 20 can also be made of plastic and is integrally injection molded.

[0056] Continue as Figure 1 and Figure 2 As shown, optionally, the cover plate 20 also includes a third baffle 5, which is connected to one side of the end cover 1, i.e., the first baffle 2 and the third baffle 5 are located on the same side of the cover plate 20. The third baffle 5 is located outside the first baffle 2, and the medium flows into the first inlet 21 through the space between the first baffle 2 and the third baffle 5. The third baffle 5 has a guiding effect on the medium, improving the hydraulic performance of the pump.

[0057] like Figure 6 As shown, further, the space between the first baffle 2 and the third baffle 5 is opposite to the second inlet 104, so that the medium can flow into the cavity from the second inlet 104 and then enter the space between the first baffle 2 and the third baffle 5.

[0058] Continue as Figure 1 As shown, the distance between the first baffle 2 and the third baffle 5 gradually decreases along the flow direction of the medium, thereby increasing the flow velocity of the medium and the velocity of the medium flowing into the first inlet 21 and the first outlet 11, further improving the hydraulic performance of the pump.

[0059] Optionally, the third baffle 5 extends to the edge of the end cap 1 at one end upstream of the medium, so that as much medium as possible flows into the space between the first baffle 2 and the third baffle 5, and reduces the flow of medium between the third baffle 5 and the side wall 109 of the chamber 101.

[0060] Optionally, the third baffle 5 is located approximately in the middle of the circumference of the first baffle 2, so that the medium collides with the outer side of the first baffle 2 as much as possible before flowing into the first inlet 21, thereby separating the air mixed with the medium and reducing cavitation and pump noise.

[0061] The cover plate 20 also includes a second baffle 4, one end of which is connected to one end of the first baffle 2 in the circumferential direction. The second baffle 4 extends outward from the first baffle 2 and away from the first baffle 2, and extends to the edge of the end cover 1.

[0062] like Figure 1 As shown, after the medium enters the chamber 101, most of the medium (referred to as the first part of the medium) flows into the first inlet 21 through the space between the first baffle 2 and the third baffle 5, as... Figure 1 The red solid arrow indicates the direction of the first part of the medium flow. However, a small amount of medium (referred to as the second part of the medium) will flow in the opposite direction, such as... Figure 1 The second part of the medium flow, indicated by the red dashed arrow, is stopped by the second baffle 4 when it flows to the second baffle 4, preventing the second part of the medium from colliding with the first part of the medium, ensuring the hydraulic performance of the pump, and reducing the pump's noise and vibration.

[0063] Preferably, the first baffle 2 and the second baffle 4 are smoothly connected to avoid forming a dead angle for the medium flow between the first baffle 2 and the second baffle 4.

[0064] like Figure 7As shown, one end of the chamber 101 is open, and a reinforcing rib 102 is provided inside the chamber 101. The reinforcing rib 102 is located at the connection between the bottom wall 108 and the side wall 109 of the chamber 101, and the reinforcing rib 102 is connected to both the bottom wall 108 and the side wall 109. The bottom wall 108 is opposite to the opening. The reinforcing rib 102 increases the strength of the pump body 10, making it less prone to deformation and stable under the impact of the medium, which can greatly reduce the noise and vibration of the pump.

[0065] Optionally, there may be multiple reinforcing ribs 102, which are spaced apart circumferentially along the chamber 101 to further improve the strength of the pump body 10 and reduce the noise and vibration of the shielded pump. In this embodiment, seven reinforcing ribs 102 are provided.

[0066] The pump body assembly provided in this embodiment enables the pump to operate stably and reliably, and can reduce noise and vibration during pump operation.

[0067] Although the present invention has been described in detail above with general descriptions, specific embodiments, and experiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A cover plate, characterized in that, include: End cap (1), wherein a first outlet (11) is provided at the center of the end cap (1); The first baffle (2) is connected to one side of the end cap (1). The first baffle (2) is arc-shaped and forms a first inlet (21) in its circumferential direction. The first outlet (11) is located inside the first baffle (2). A buffer plate (3) is provided, with its first end (31) connected to the inner side of the first baffle (2) and opposite to the first inlet (21). The first outlet (11) is located between the first inlet (21) and the first baffle (2).

2. The cover plate according to claim 1, characterized in that, The second end (32) of the buffer plate (3) includes an inclined surface (321), and the first end (31) is opposite to the second end (32); The distance between the inclined surface (321) and the first end (31) gradually decreases from the end away from the end cap (1) to the end closer to the end cap (1).

3. The cover plate according to claim 1, characterized in that, The cover plate (20) further includes a second baffle (4), one end of which is connected to one end of the first baffle (2) in the circumferential direction. The second baffle (4) extends outward from the first baffle (2) and away from the first baffle (2), and extends to the edge of the end cap (1).

4. The cover plate according to any one of claims 1-3, characterized in that, The cover plate (20) also includes a third baffle (5), which is connected to one side of the end cap (1). The third baffle (5) is located outside the first baffle (2), and the medium flows into the first inlet (21) through the first baffle (2) and the second baffle (4).

5. The cover plate according to claim 4, characterized in that, Along the flow direction of the medium, the distance between the first baffle (2) and the third baffle (5) gradually decreases.

6. The cover plate according to claim 1, characterized in that, The first baffle (2) is arc-shaped, the cross-section of the first outlet (11) is circular, and the first baffle (2) and the first outlet (11) are coaxial.

7. The cover plate according to any one of claims 1-3, characterized in that, The end cap (1) has a positioning notch (12), and the cover plate (20) is configured to be installed inside the pump body (10). The positioning notch (12) enables the cover plate (20) to be positioned between the pump body (10).

8. A pump body assembly, characterized in that, The pump body (10) includes a pump body (10) and a cover plate (20) as described in any one of claims 1-7, wherein the pump body (10) has a chamber (101) and the cover plate (20) is disposed in the chamber (101).

9. The pump body assembly according to claim 8, characterized in that, The chamber (101) has an opening at one end, and a reinforcing rib (102) is provided inside the chamber (101). The reinforcing rib (102) is located at the connection between the bottom wall (108) and the side wall (109) of the chamber (101), and the reinforcing rib (102) is connected to both the bottom wall (108) and the side wall (109). The bottom wall (108) is opposite to the opening.

10. The pump body assembly according to claim 8 or 9, characterized in that, The pump assembly further includes an impeller (103), and the chamber (101) includes a first chamber (1011). The ratio of the diameter D1 of the impeller (103) to the inner diameter D2 of the first chamber (1011) directly opposite the impeller (103) is 3 / 7 to 2 / 3.

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