Pump body flow channel structure

Abstract

The application relates to a pump body flow channel structure applied to the technical field of pumps, which comprises a pump shell, an inlet pipe and an outlet pipe arranged on the pump shell respectively, a flow guide cover is communicated with the outlet end of the inlet pipe, a flow guide cavity communicated with the outlet pipe is arranged between the flow guide cover and the pump shell, a first flow guide part and a second flow guide part are arranged on the flow guide cover, and the second flow guide part is arranged between the first flow guide part and the outlet pipe. When the pump body is assembled, the flow guide cover is arranged at the outlet end of the inlet pipe, at this time, the impeller of the pump body is arranged below the flow guide cover, the upper part of the first flow guide part and the second flow guide part forms a flow guide channel, that is, the flow guide channel is communicated with the flow guide cavity, and one end of the flow guide channel is communicated with the inlet end of the outlet pipe; when the impeller rotates, liquid enters the flow guide cavity from the inlet pipe, the liquid passes through the flow guide channel and is guided to the inlet end of the outlet pipe, the kinetic energy loss in the liquid flowing process is reduced, and then the liquid flow rate and the lift are increased.

Description

Technical Field

[0001] This application relates to the field of pump technology, and in particular to a pump body flow channel structure. Background Technology

[0002] A pump is a device that uses the pressure difference generated by mechanical motion to transport liquids or gases. It is widely used in water conservancy projects, urban water supply, and household appliances.

[0003] Announcement No. CN209354380U discloses a cast aluminum integrated heating pump, including an upper pump housing and a lower pump housing. The lower pump housing is located at the bottom of the upper pump housing and is snapped into the upper pump housing. The upper pump housing is a cast aluminum integrated heating structure, including an internal heating tube and a cast aluminum outer shell. The bottom of the upper pump housing and the inner side of the lower pump housing form a pump cavity. A pressure switch is provided on one side of the lower pump housing, and a liquid outlet is provided on the other side of the lower pump housing. The bottom of the lower pump housing is connected to a motor. A rotating shaft is provided on the motor. One end of the rotating shaft extends into the pump cavity. An impeller is provided on the end of the rotating shaft away from the motor, and the impeller is located in the pump cavity.

[0004] During the operation of the aforementioned heating pump, after the impeller rotates, the liquid flows directly from the pump chamber to the outlet. During the reversal of the water flow, the kinetic energy loss is too large, resulting in a slow water flow velocity and a low head, which makes it difficult to meet market demands. Summary of the Invention

[0005] To help solve the problems existing in related technologies, this application provides a pump body flow channel structure, which adopts the following technical solution: it includes a pump casing, an inlet pipe and an outlet pipe respectively disposed on the pump casing, the outlet end of the inlet pipe is connected to a flow guide shroud, a flow guide cavity communicating with the outlet pipe is provided between the flow guide shroud and the pump casing, the flow guide shroud is provided with a first flow guide part and a second flow guide part, and the second flow guide part is disposed between the first flow guide part and the outlet pipe.

[0006] In one specific implementation, the first guide portion includes a first inclined portion inclined toward the direction of the inlet pipe and a second inclined portion inclined away from the direction of the inlet pipe.

[0007] In one specific implementation, a blocking portion is provided between the first inclined portion and the second inclined portion, which is positioned toward the direction of the liquid inlet pipe.

[0008] In one specific implementation, the second guide portion is not lower than the inner wall of the outlet pipe.

[0009] In one specific implementation, an impact plate is provided at the end of the second guide section away from the first guide section, and the impact plate is located on the side of the liquid inlet end of the liquid outlet pipe away from the first guide section.

[0010] In one specific implementation, the pump housing is provided with a limiting part on the side of the inlet end of the outlet pipe away from the first guide part, and the limiting part abuts against the impact plate.

[0011] In one specific implementation, the first guide portion and the second guide portion extend circumferentially around the inlet pipe in sequence.

[0012] In one specific implementation, the flow guide shroud is provided with a liquid passage hole at the second flow guide section, and two cavities are formed inside the pump casing. The two cavities are a flow guide cavity located on the side of the flow guide shroud away from the liquid inlet pipe and a liquid storage cavity located on the side of the flow guide shroud closer to the liquid inlet pipe. The liquid passage hole connects the flow guide cavity and the liquid storage cavity, and the bottom height of the liquid storage cavity is lower than the height of the highest position of the inner wall of the liquid outlet pipe.

[0013] In one specific implementation, the flow guide cover is provided with a flow guide groove, which is located at the end of the second flow guide portion away from the first flow guide portion.

[0014] In one specific implementation, the guide channel extends spirally from the end of the second guide section away from the first guide section toward the liquid storage cavity.

[0015] In summary, this application has the following beneficial technical effects: During assembly, the guide shroud is placed at the outlet end of the inlet pipe, and the impeller of the pump body is placed below the guide shroud. A guide channel is formed above the first guide part and the second guide part, that is, the guide channel is connected to the guide cavity, and one end of the guide channel is connected to the inlet end of the outlet pipe. When the impeller rotates, the liquid enters the guide cavity from the inlet pipe. The liquid passes through the guide channel and is guided to the inlet end of the outlet pipe, which reduces the loss of kinetic energy during the liquid flow process, thereby increasing the liquid flow rate and head. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this application.

[0017] Figure 2 This is a schematic cross-sectional view of the structure of this application.

[0018] Figure 3 This is a schematic diagram of the internal structure of the pump casing in this application.

[0019] Figure 4 This is a schematic diagram of the structure of the fairing in this application.

[0020] Figure 5 This application presents a structural schematic diagram of the fairing from another perspective.

[0021] Reference numerals: 1. Pump housing; 11. Limiting part; 12. Discharge pipe; 13. Limiting part; 2. Flow guide shroud; 21. Liquid passage hole; 3. Flow guide cavity; 4. First flow guide part; 41. First inclined part; 42. Second inclined part; 43. Blocking part; 5. Second flow guide part; 6. Impact plate; 7. Liquid storage cavity; 8. Flow guide groove. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0023] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.

[0024] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0025] Reference Figures 1-3 This application discloses a pump body flow channel structure, including a pump housing 1, an inlet pipe 11 and an outlet pipe 12 respectively disposed on the pump housing 1 (the inlet pipe 11 is disposed on the flange at the top of the pump housing 1, and the outlet pipe 12 is disposed in the circumferential direction of the pump housing 1). The outlet end of the inlet pipe 11 is connected to a flow guide shroud 2. A flow guide cavity 3 communicating with the outlet pipe 12 is provided between the flow guide shroud 2 and the pump housing 1. The flow guide shroud 2 is provided with a first flow guide part 4 and a second flow guide part 5. The second flow guide part 5 is disposed between the first flow guide part 4 and the outlet pipe 12. During assembly, the flow guide shroud 2 is placed at the outlet end of the inlet pipe 11. At this time, the impeller of the pump body is placed below the guide shroud 2 (the direction below is the direction of the guide cavity 3 relative to the inlet pipe 11), and the upper part of the first guide section 4 and the second guide section 5 (the direction above is the direction of the inlet pipe 11 relative to the guide cavity 3) is the guide channel, that is, the guide channel is connected to the guide cavity 3, and one end of the guide channel is connected to the inlet end of the outlet pipe 12; when the impeller rotates, the liquid enters the guide cavity 3 from the inlet pipe 11, and the liquid is guided to the inlet end of the outlet pipe 12 through the guide channel, which reduces the loss of kinetic energy during the liquid flow process, thereby increasing the liquid flow rate and head.

[0026] Reference Figures 3-5 The first guide section 4 and the second guide section 5 extend circumferentially around the inlet pipe 11, that is, the guide channel is arc-shaped, and the end of the guide channel away from the outlet pipe 12 and the side of the guide channel near the outlet end of the inlet pipe 11 are connected to the guide cavity 3, increasing the flow rate of liquid entering the guide channel from the guide cavity 3. The first guide section 4 includes a first inclined section 41 inclined towards the inlet pipe 11 and a second inclined section 42 inclined away from the inlet pipe. A blocking section 43 is provided between the first inclined section 41 and the second inclined section 42, facing the inlet pipe. Specifically The optimal position of the blocking part 43 is set at a position close to the outer side of the circumferential flow channel. The highest point of the blocking part 43 is located on the outer side of the first flow channel 4. That is, the first inclined part 41 and the second inclined part 42 are formed by extending downward at an incline from this highest point to other positions of the first flow channel 4. In this way, after the liquid inside the flow channel 3 enters the flow channel, it passes through the special shape composed of the first inclined part 41, the second inclined part 42 and the blocking part 43, which reduces the kinetic energy loss of the liquid and guides it to the inlet of the liquid outlet pipe 12, further improving the liquid flow rate and head.

[0027] Reference Figure 3 The second guide section 5 is not lower than the inner wall of the outlet pipe 12, so that no upward step is formed between the second guide section 5 and the outlet pipe 12, so that when the liquid enters the outlet pipe 12 from the guide channel, some liquid will not be unable to directly enter the outlet pipe 12 due to the presence of the step.

[0028] Reference Figures 3-5 To allow the liquid in the guide channel to enter the outlet pipe 12 as much as possible, an impact plate 6 is provided at the end of the second guide section 5 away from the first guide section 4. The impact plate 6 is located on the side of the inlet end of the outlet pipe 12 away from the first guide section 4. When the liquid passes through the inlet end of the outlet pipe 12 and reaches the impact plate 6, it is blocked by the impact plate 6 and flows back into the outlet pipe 12. Combined with the impact plate 6, a limiting part 13 is provided on the side of the inlet end of the outlet pipe 12 away from the first guide section 4. The limiting part 13 abuts against the impact plate 6. In this way, when installing the guide cover 2, the impact plate 6 is abutted against the limiting part 13, so as to position the installation position of the guide cover 2 and improve the convenience of installation.

[0029] Reference Figures 2-5The flow guide shroud 2 has a liquid passage hole 21 above the second flow guide section 5. The flow guide shroud 2 has a flow guide cavity 3 on the side of the liquid outlet of the inlet pipe 11. The pump housing 1 has two cavities: the flow guide cavity 3 located on the side of the flow guide shroud 2 away from the inlet pipe 11, and the storage cavity 7 located on the side of the flow guide shroud 2 closer to the inlet pipe 11. The bottom of the storage cavity 7 is lower than the highest point of the inner wall of the outlet pipe 12. In other words, the flow guide shroud 2 divides the inner cavity of the pump housing 1 into two cavities (the storage cavity 7 and the flow guide cavity 3). When liquid passes through the flow guide channel, liquid that has not entered the outlet pipe 12 will enter the storage cavity 7 through the liquid passage hole 21 (the liquid entering the storage cavity 7 is accelerated by the flow guide channel and forms a vortex within the storage cavity 7). Furthermore, the flow guide shroud 2 is provided with a flow guide groove 8, which is located on the second... The end of the guide section 5 away from the first guide section 4, and the end of the guide channel 8 near the second guide section 5 located on one side of the impact plate 6. The guide channel 8 extends spirally from the end of the second guide section 5 away from the first guide section 4 toward the liquid storage chamber 7. Thus, the liquid reaching the end of the second guide section 5 (the end away from the first guide section 4) is partially passed through the impact plate 6 and enters the outlet pipe 12, while the other part enters the guide channel 8. Due to the spiral extension of the guide channel 8, and the fact that the width and depth of the guide channel 8 gradually decrease from the end of the second guide section 5, the liquid is accelerated and rushed toward the liquid storage chamber 7 after passing through the guide channel 8. The liquid forms a vortex in the liquid storage chamber 7, and the bottom height of the liquid storage chamber 7 is lower than the height of the highest position of the inlet of the outlet pipe 12. After the liquid moves in the liquid storage chamber 7, some of the liquid will enter the outlet pipe 12, further increasing the rate at which the liquid enters the outlet pipe 12.

[0030] In summary: During assembly, the flow guide shroud 2 is placed at the outlet end of the inlet pipe 11. At this time, the impeller of the pump body is placed below the flow guide shroud 2, and the first flow guide 4 and the second flow guide 5 form a flow guide channel above each other. That is, the flow guide channel is connected to the flow guide cavity 3, and one end of the flow guide channel is connected to the inlet end of the outlet pipe 12. When the impeller rotates, the liquid enters the flow guide cavity 3 from the inlet pipe 11. The liquid passes through the flow guide channel and is guided to the inlet end of the outlet pipe 12, which reduces the loss of kinetic energy during the liquid flow process, thereby increasing the liquid flow rate and head.

[0031] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A pump body flow passage structure, characterized by: The pump housing (1) is provided with an inlet pipe (11) and an outlet pipe (12). The outlet end of the inlet pipe (11) is connected to a flow guide (2). A flow guide cavity (3) communicating with the outlet pipe (12) is provided between the flow guide (2) and the pump housing (1). The flow guide (2) is provided with a first flow guide (4) and a second flow guide (5). The second flow guide (5) is provided between the first flow guide (4) and the outlet pipe (12).

2. The pump body flow passage structure of claim 1, wherein: The first guide section (4) includes a first inclined section (41) inclined toward the liquid inlet pipe (11) and a second inclined section (42) inclined away from the liquid inlet pipe (11).

3. The pump body flow passage structure of claim 2, wherein: A blocking part (43) is provided between the first inclined part (41) and the second inclined part (42) and is arranged in the direction of the liquid inlet pipe (11).

4. The pump body flow channel structure according to claim 3, characterized in that: The second guide section (5) is not lower than the inner wall of the liquid outlet pipe (12).

5. The pump body flow channel structure according to claim 1, characterized in that: The second guide section (5) is provided with an impact plate (6) at one end away from the first guide section (4). The impact plate (6) is located on the side of the liquid inlet end of the liquid outlet pipe (12) away from the first guide section (4).

6. The pump body flow channel structure according to claim 5, characterized in that: The pump housing (1) has a limiting part (13) on the side of the liquid inlet end of the liquid outlet pipe (12) away from the first guide part (4), and the limiting part (13) abuts against the impact plate (6).

7. The pump body flow channel structure according to claim 1, characterized in that: The first guide section (4) and the second guide section (5) extend circumferentially around the liquid inlet pipe (11) in sequence.

8. The pump body flow channel structure according to any one of claims 1-5, characterized in that: The flow guide (2) is provided with a liquid passage hole (21) at the second flow guide (5). The pump housing (1) forms two cavities. The two cavities are a flow guide cavity (3) located on the side of the flow guide (2) away from the liquid inlet pipe (11) and a liquid storage cavity (7) located on the side of the flow guide (2) close to the liquid inlet pipe (11). The liquid passage hole (21) passes through the flow guide cavity (3) and the liquid storage cavity (7). The bottom height of the liquid storage cavity (7) is lower than the height of the highest position of the inner wall of the liquid outlet pipe (12).

9. The pump body flow channel structure according to claim 8, characterized in that: The flow guide cover (2) is provided with a flow guide groove (8), which is located at the end of the second flow guide part (5) away from the first flow guide part (4).

10. The pump body flow channel structure according to claim 9, characterized in that: The guide groove (8) extends spirally from the end of the second guide section (5) away from the first guide section (4) toward the side of the liquid storage cavity (7).

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