Pump cover plate and pump body

Abstract

The utility model relates to a pump cover plate and a pump body, the pump cover plate comprises: an end cover, the center of which is provided with an outlet; the arc baffle is connected to one side of the end cover, the arc baffle extends in the circumferential direction of the end cover, and the outlet is located in the inner side of the arc baffle; the baffle plate is connected to one side of the end cover and used for stopping a medium, and the first end, in the circumferential direction, of the arc baffle plate and the baffle plate are arranged in a spaced mode so that a baffle opening allowing the medium to pass through can be formed; the second end in the circumferential direction of the arc baffle and the baffle plate are arranged at an interval so as to form a standby opening allowing a medium to pass through, and the size of the baffle opening is smaller than that of the standby opening. The pump cover plate can improve the efficiency of the pump, simplify the pump body structure and enlarge the use scene of the pump.

Description

Technical Field

[0001] The utility model relates to the technical field of pumps, in particular to a pump cover plate and a pump body. Background Art

[0002] In the prior art, a pump cover plate is arranged in a pump body. A medium enters the pump body from a suction port of the pump body, passes through an outlet of the pump cover plate, and flows out from a water outlet of the main body. An impeller is located downstream of the pump cover plate to provide power for the flow of the medium.

[0003] When the medium enters the cavity of the pump body, the medium will be mixed with a certain amount of air, causing cavitation of the pump and affecting the service life and performance of the pump. In addition, during the operation of the pump, noise will be generated. In the prior art, in order to reduce the air in the medium, baffles are often connected to the inner wall of the cover plate or the pump body. After the medium enters the pump body from the suction port, the medium will hit the baffle to achieve gas-liquid separation. However, all the medium needs to be blocked by the baffle before flowing out. When the flow rate of the pump is small, the baffle greatly reduces the working efficiency of the pump. In addition, when the baffle is connected to the inner wall of the pump body, the complexity of the pump body structure is further increased, making the originally complex pump body more difficult to manufacture. Summary of the Utility Model

[0004] An object of the utility model is to provide a pump cover plate to solve at least one of the above technical problems.

[0005] To achieve the above object, the first aspect of the utility model provides a pump cover plate, including:

[0006] An end cover, with an outlet opened at the center of the end cover;

[0007] An arc baffle, connected to one side of the end cover, extending circumferentially along the end cover, and the outlet is located inside the arc baffle;

[0008] A baffle plate, connected to one side of the end cover and used to block the medium. A first end in the circumferential direction of the arc baffle is spaced from the baffle plate to form a baffle opening allowing the medium to pass through; a second end in the circumferential direction of the arc baffle is spaced from the baffle plate to form a spare opening allowing the medium to pass through, and the size of the baffle opening is smaller than the size of the spare opening.

[0009] Optionally, the baffle plate extends radially along the end cover or the extending direction of the baffle plate forms an angle with the radial direction of the end cover.

[0010] Optionally, the arc baffle includes a connected first arc portion and a second arc portion. The first arc portion is connected to the end cover, and the diameter of the first arc portion is larger than the diameter of the second arc portion.

[0011] Optionally, the arc-shaped baffle further includes a transition portion, which is connected between the first arc portion and the second arc portion, and the diameters of the first arc portion, the transition portion, and the second arc portion decrease in sequence.

[0012] Optionally, the central angle corresponding to the arc-shaped baffle is 180°.

[0013] Another object of the present invention is to provide a pump body to solve at least one of the above technical problems.

[0014] To achieve this purpose, the second aspect of the present invention adopts the following technical solutions:

[0015] A pump body includes a pump housing and the pump cover plate. The pump housing has a pump chamber, the pump cover plate is arranged in the pump chamber, and there are spaces between the side surface and the axial end surface of the arc-shaped baffle and the inner wall of the pump chamber;

[0016] The pump housing is also provided with a first water inlet and a second water inlet that are both communicated with the pump chamber. The first water inlet is opposite to the side surface of the arc-shaped baffle, and the second water inlet is opposite to the baffle opening and at least part of the baffle plate.

[0017] Optionally, a third water inlet communicated with the pump chamber is further opened on the pump housing, and the third water inlet is opposite to the spare port.

[0018] Optionally, the pump housing is also provided with an exhaust hole communicated with the pump chamber.

[0019] Optionally, the first water inlet, the second water inlet, and the third water inlet are all arranged in a staggered manner with respect to the exhaust hole.

[0020] Optionally, the pump housing is also provided with a water outlet communicated with the pump chamber, and the water outlet is located on the side of the end cover away from the arc-shaped baffle.

[0021] As can be seen from the above, in the technical solution provided by the present utility model, when the flow rate of the medium conveyed by the pump housing is large, the inlet direction of the medium can be made to face the arc baffle directly, and the medium will all hit the arc baffle, so that the gas can be well separated without affecting the efficiency of the pump. When the flow rate of the medium conveyed by the pump housing is small, the inlet direction of the medium can be made to face the baffle port directly, and at the same time, it also faces part of the arc baffle and / or at least part of the baffle plate. Part of the medium flows directly through the baffle port, and part of the medium will hit the arc baffle and / or the baffle plate. The medium is scattered by the arc baffle and / or the baffle plate, so that the gas can be well separated. At the same time, since part of the medium can flow directly through the baffle port, the efficiency of the pump is not affected. When the flow rate of the medium conveyed by the pump housing is very small or the medium does not contain air, the inlet direction of the medium can be made to face the spare port, so that the efficiency of the pump is not affected. In this embodiment, the pump can adapt to conveying media with different flow rates, has a wide range of applications, and can ensure the efficiency of the pump. In this embodiment, the arc baffle and the baffle plate are connected to the end cover, rather than directly on the inner wall of the pump housing, which simplifies the structure of the pump housing, facilitates the processing of the pump housing, and at the same time facilitates the control of the relative position between the cover plate and the medium inflow direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural view of a pump cover plate provided by an embodiment of the present utility model;

[0023] Figure 2 is a schematic structural view of another pump cover plate provided by an embodiment of the present utility model;

[0024] Figure 3 is a perspective view of a pump cover plate provided by an embodiment of the present utility model;

[0025] Figure 4 is a schematic structural view of another perspective of a pump cover plate provided by an embodiment of the present utility model;

[0026] Figure 5 is a perspective view of a pump body provided by an embodiment of the present utility model;

[0027] Figure 6 is a schematic structural view of a pump body provided by an embodiment of the present utility model;

[0028] Figure 7 is a schematic structural view of another perspective of a pump body provided by an embodiment of the present utility model;

[0029] Figure 8 is Figure 7 a cross-sectional view taken along line A-A in;

[0030] Figure 9 is a cross-sectional view of another position of the pump body provided by an embodiment of the present utility model;

[0031] Figure 10 It is a cross-sectional view of another position of the pump body provided by an embodiment of the present utility model.

[0032] In the figure:

[0033] 1. Pump cover plate; 11. End cover; 111. Outlet; 12. Arc baffle; 121. First arc part; 122. Second arc part; 123. Transition part; 13. Baffle plate; 14. Baffle port; 15. Spare port;

[0034] 2. Pump housing; 21. Pump cavity; 22. Impeller installation cavity; 23. Water outlet; 24. Second water inlet; 25. First water inlet; 26. Third water inlet; 27. Exhaust hole; 28. Installation port; Specific embodiments

[0035] The technical solution of the present utility model will be further described below with reference to the accompanying drawings and through specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all of them.

[0036] Some orientation words are defined in the present utility model. Without contrary explanations, the orientation words such as "upper", "lower", "left", "right", "inner", and "outer" are used for convenience of understanding, and thus do not constitute a limitation to the protection scope of the present utility model.

[0037] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0038] In the description of the present utility model, unless otherwise clearly specified and defined, the terms "connected", "connected to", and "fixed" should be understood 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 components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0039] The present embodiment provides a pump cover plate 1, which is used in centrifugal pumps, energy-saving pumps, water source heat pumps and other pumps. Optionally, the pump can be used to supply normal temperature medium or hot water, hot oil and other heat media, such as when the pump is used in a wall-mounted boiler, etc., to improve the efficiency of the pump, simplify the pump body structure, and expand the use scenarios of the pump.

[0040] like Figures 1-4 As shown, the pump cover plate 1 provided in this embodiment includes an end cover 11, an arc baffle 12 and a deflector 13. An outlet 111 is opened at the center of the end cover 11. The arc baffle 12 is connected to one side of the end cover 11. The arc baffle 12 extends along the circumference of the end cover 11, and the outlet 111 is located on the inner side of the arc baffle 12.

[0041] The baffle 13 is connected to one side of the end cover 11 and is used to stop the medium. The first circumferential end of the arc baffle 12 is spaced apart from the baffle 13 to form a baffle port 14 that allows the medium to pass through. The second circumferential end of the arc baffle 12 is spaced apart from the baffle 13 to form a spare port 15 that allows the medium to pass through. The size of the baffle port 14 is smaller than the size of the spare port 15.

[0042] When the medium flow rate of the pump housing 2 is large, the medium entry direction can be made to face the arc baffle 12, and the medium will hit the arc baffle 12, so that the gas can be well separated, and the efficiency of the pump will not be affected. When the medium flow rate of the pump housing 2 is small, the medium entry direction can be made to face the baffle 14, and at the same time, it is also facing part of the arc baffle 12 and / or at least part of the baffle 13, part of the medium flows directly from the baffle 14, and part of the medium will hit the arc baffle 12 and / or the baffle 13, and the medium is broken up by the arc baffle 12 and / or the baffle 13, so that the gas can be well separated, and at the same time, since part of the medium can flow directly from the baffle 14, it will not affect the efficiency of the pump. When the medium flow rate of the pump housing 2 is very small or the medium does not contain air, the medium entry direction can be made to face the spare port 15, so that the efficiency of the pump will not be affected. The pump in this embodiment can adapt to the medium of transmitting different flow rates, has a wide range of use, and can ensure the efficiency of the pump. In this embodiment, the arc baffle 12 and the deflector 13 are connected to the end cover 11 instead of directly to the inner wall of the pump casing 2, so that the structure of the pump casing 2 is simplified, the processing of the pump casing 2 is facilitated, and the relative position of the cover plate and the medium inflow direction is controlled.

[0043] The baffle 13 extends radially along the end cover 11 or, as Figure 1 and Figure 2 As shown, the extension direction of the baffle 13 forms an angle with the radial direction of the end cover 11. Figure 1 In the embodiment, the radial angle between the baffle 13 and the end cover 11 is α1. Figure 2 In the embodiment, the radial angle between the baffle plate 13 and the end cover 11 is α2, and α1 is greater than α2.

[0044] As Figure 3 and Figure 4 shown, by way of example, the baffle 13 is a flat plate, and the baffle 13 also extends along the axial direction of the end cover 11 to block the medium.

[0045] As Figure 1 and Figure 2 shown, optionally, the central angle corresponding to the arc baffle 12 is 180°, so as to better remove the air in the medium and ensure the connection strength between the arc baffle 12 and the cover plate.

[0046] As Figure 3 shown, optionally, the arc baffle 12 includes a connected first arc portion 121 and a second arc portion 123. The first arc portion 121 is connected to the end cover 11, and the diameter of the first arc portion 121 is larger than that of the second arc portion 123. The diameter of the second arc portion 123 is relatively small, which can reserve space for the medium to flow into the pump housing 2 and prevent the medium from flowing back.

[0047] Preferably, the arc baffle 12 further includes a transition portion 122, and the transition portion 122 is connected between the first arc portion 121 and the second arc portion 123. The diameters of the first arc portion 121, the transition portion 122, and the second arc portion 123 decrease in sequence. The transition portion 122 can reduce the stress between the first arc portion 121 and the second arc portion 123 and improve the strength of the arc baffle 12.

[0048] As Figures 5-10 shown, this embodiment further provides a pump body, which includes a pump housing 2 and the above-mentioned pump cover plate 1. The pump housing 2 has a pump chamber 21, and the pump cover plate 1 is arranged in the pump chamber 21. There is a distance between the side surface and the axial end surface of the arc baffle 12 and the inner wall of the pump chamber 21 (as Figure 9 shown). As Figure 8 shown, the pump housing 2 is further provided with a first water inlet 25 and a second water inlet 24 that are both communicated with the pump chamber 21. The first water inlet 25 is directly opposite to the side surface of the arc baffle 12, and the second water inlet 24 is directly opposite to the baffle opening 14 and at least part of the baffle 13.

[0049] As Figure 8 and Figure 9 shown, the flow rate of the medium entering the pump housing 2 through the first water inlet 25 can be the largest, and the medium will all hit the arc baffle 12, so that the gas can be well separated. After the medium hits the arc baffle 12, it can flow into the pump chamber 21 from the space between the end surface of the arc baffle 12 and the inner wall of the pump chamber 21 (as Figure 9 the dotted line and the arrow indicate the flow direction of the medium), and can also bypass the side surface of the arc baffle 12 and enter the pump chamber 21 from the baffle opening 14 and the standby opening 15.

[0050] The flow rate of the medium entering the pump housing 2 through the second water inlet 24 can be slightly smaller. Part of the medium will impact the baffle plate 13, part of the medium will flow directly through the baffle port 14, and after another part of the medium impacts the baffle plate 13, it will flow into the pump chamber 21 through the baffle port 14 (as Figure 8 the dotted line and the arrow indicate the flow direction of the medium). The overall medium is dispersed by the baffle plate 13, so that the gas can be separated well. Since part of the medium can flow directly through the baffle port 14, the efficiency of the pump will not be affected.

[0051] Exemplarily, the first water inlet 25 can be connected to the hot water of the boiler to realize the large circulation of the wall-mounted boiler, and the flow rate of the medium entering the first water inlet 25 is the largest. The second water inlet 24 can be connected to domestic water to realize the small circulation of the wall-mounted boiler, and the flow rate of the medium entering the second water inlet 24 is less than the flow rate of the medium entering the first water inlet 25. It can be understood that the equipment connected upstream of the first water inlet 25 and the second water inlet 24 is not limited to this, and the above is only an exemplary description.

[0052] As Figures 5-10 shown, the pump housing 2 is also provided with a water outlet 23 communicating with the pump chamber 21, and the water outlet 23 is located on the side of the end cover 11 away from the arc baffle 12. After the medium enters the pump housing 2 from the first water inlet 25 or the second water inlet 24, it flows out from the outlet 111 on the pump cover plate 1, and then flows out of the pump housing 2 through the water outlet 23.

[0053] As Figure 9 shown, the pump housing 2 may further include an impeller installation cavity 22 communicating with the pump chamber 21. The impeller installation cavity 22 is located on one side of the pump cover plate 1. That is to say, the impeller installation cavity 22 and the arc baffle 12 are respectively located on both sides of the end cover 11 in the axial direction. The pump cover plate 1 has a guiding effect, so that the medium flows more smoothly in the pump housing 2, improving the efficiency of the water pump. Further, the water outlet 23 is directly communicated with the impeller installation cavity 22. The medium flows from the outlet 111 on the pump cover plate 1 to the impeller installation cavity 22, and then flows out of the pump housing 2 through the water outlet 23.

[0054] As Figure 5 and Figure 9 shown, optionally, the pump housing 2 is also provided with an installation port 28 communicating with the impeller installation cavity 22. There is a step surface between the impeller installation cavity 22 and the pump chamber 21. The end cover 11 can enter the impeller installation cavity 22 and the pump chamber 21 through the installation port 28. When the end cover 11 abuts against the step surface, the arc baffle 12 and the baffle plate 13 are inserted into the pump housing 2, and the pump end cover 11 is installed in place. The impeller can also be installed into the impeller installation cavity 22 through the installation port 28. The installation port 28 can be connected to the motor, and the output shaft of the motor is connected to the impeller to drive the impeller to rotate.

[0055] As Figure 8 and Figure 10As shown, a third water inlet 26 communicating with the pump chamber 21 is further formed in the pump housing 2. The third water inlet 26 is directly opposite to the standby port 15. The medium entering the pump housing 2 through the third water inlet 26 directly flows into the pump housing 2 through the standby port 15 (as Figure 10 The dotted line and the arrow indicate the flow direction of the medium). Specifically, after the medium enters the pump housing 2 through the third water inlet 26, it flows to the impeller installation cavity 22 through the outlet 111 on the pump cover plate 1, and then flows out of the pump housing 2 through the water outlet 23.

[0056] In order to smoothly discharge the air in the pump housing 2, an exhaust hole 27 communicating with the pump chamber 21 is further formed in the pump housing 2.

[0057] As Figure 8 and Figure 9 shown, optionally, the first water inlet 25, the second water inlet 24 and the third water inlet 26 are all arranged in a staggered manner with respect to the exhaust hole 27, that is to say, the first water inlet 25, the second water inlet 24 and the third water inlet 26 are not directly opposite to the exhaust hole 27. In this way, the medium entering the pump housing 2 will not directly impact the exhaust valve connected to the exhaust hole 27, thereby avoiding the leakage of the medium from the exhaust hole 27.

[0058] Exemplarily, the exhaust hole 27 is located on the upper side of the pump housing 2. The density of air is less than that of the medium, so the air floats and is discharged through the exhaust hole 27.

[0059] Although the present invention has been described in detail above with general descriptions, specific embodiments and experiments, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A pump cover plate, characterized in that: include: An end cover (11), wherein an outlet (111) is formed at the center of the end cover (11); A circular arc baffle (12), the circular arc baffle (12) being connected to one side of the end cover (11), the circular arc baffle (12) extending along the circumference of the end cover (11), and the outlet (111) being located on the inner side of the circular arc baffle (12); A baffle (13) is connected to one side of the end cover (11) and is used to stop the medium. The first end of the circular arc baffle (12) is spaced apart from the baffle (13) in the circumferential direction to form a baffle opening (14) that allows the medium to pass through. The second end of the circular arc baffle (12) is spaced apart from the baffle (13) in the circumferential direction to form a spare opening (15) that allows the medium to pass through. The size of the baffle opening (14) is smaller than the size of the spare opening (15).

2. The pump cover plate according to claim 1, characterized in that: The baffle plate (13) extends in the radial direction of the end cover (11), or the extension direction of the baffle plate (13) forms an angle with the radial direction of the end cover (11).

3. The pump cover plate according to claim 1, characterized in that: The circular arc baffle (12) comprises a first circular arc portion (121) and a second circular arc portion (123) which are connected to each other, the first circular arc portion (121) is connected to the end cover (11), and the diameter of the first circular arc portion (121) is greater than the diameter of the second circular arc portion (123).

4. The pump cover plate according to claim 3, characterized in that: The circular arc baffle (12) further comprises a transition portion (122), wherein the transition portion (122) is connected between the first circular arc portion (121) and the second circular arc portion (123), and the diameters of the first circular arc portion (121), the transition portion (122) and the second circular arc portion (123) decrease successively.

5. The pump cover plate according to any one of claims 1 to 4, characterized in that: The central angle corresponding to the arc baffle (12) is 180°.

6. A pump body, characterized in that: Comprising a pump housing (2) and a pump cover plate according to any one of claims 1 to 5, the pump housing (2) having a pump cavity (21), the pump cover plate being arranged in the pump cavity (21), and the side surface and the axial end surface of the arc baffle (12) being spaced apart from the inner wall of the pump cavity (21); The pump housing (2) is further provided with a first water inlet (25) and a second water inlet (24), both of which are connected to the pump chamber (21); the first water inlet (25) is directly opposite to the side of the arc baffle (12); and the second water inlet (24) is directly opposite to the deflection port (14) and at least part of the deflection plate (13).

7. The pump body according to claim 6, characterized in that: The pump housing (2) is also provided with a third water inlet (26) which is in communication with the pump chamber (21), and the third water inlet (26) is directly opposite to the standby port (15).

8. The pump body according to claim 7, characterized in that: The pump housing (2) is also provided with an exhaust hole (27) which is in communication with the pump chamber (21).

9. The pump body according to claim 8, characterized in that: The first water inlet (25), the second water inlet (24) and the third water inlet (26) are all arranged in a staggered manner with respect to the exhaust hole (27).

10. The pump body according to any one of claims 6 to 9, characterized in that: The pump housing (2) is further provided with a water outlet (23) communicating with the pump chamber (21), and the water outlet (23) is located on a side of the end cover (11) away from the arc baffle (12).

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