Pump body eccentric structure

Abstract

The application relates to a pump body eccentric structure applied to the technical field of pumps, which comprises a pump shell, an impeller arranged in the pump shell and a liquid inlet pipe, a flange plate for sealing an opening of the pump shell is arranged on the pump shell, the liquid inlet pipe is arranged on the flange plate, and the axis of the flange plate is arranged in dislocation with the axis of the impeller. In the installation process, the axis of the pipeline installation opening is arranged in dislocation with the axis of the impeller, the width of the flange plate is different at different circumferential angles of the liquid inlet pipe, that is, the area of the flange plate on one side of the liquid inlet pipe is larger, and the area of the flange plate on the other side is smaller, the side with the larger area is convenient for assembling other components, so that other components can be reasonably installed with a large enough area without increasing the overall radial dimension of the top surface of the upper pump shell, and the installation demand under the condition of narrow space is met.

Description

Technical Field

[0001] This application relates to the field of pump technology, and in particular to an eccentric structure for a pump body. 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 water outlet is provided on the other side. The bottom of the lower pump housing is connected to a motor. A rotating shaft is provided on the motor, one end of which 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 inside the pump cavity.

[0004] During the installation of the aforementioned heating pump, the center of the impeller coincides with the center of the top surface of the upper pump casing. This causes the overall radial dimension of the mounting surface required on the top surface of the upper pump casing to increase further when other components are assembled on the top surface of the upper pump casing. Consequently, the space occupied by the heating pump as a whole increases, making it difficult to meet the pump's usage requirements in confined spaces. Summary of the Invention

[0005] To help solve the problems existing in related technologies, this application provides an eccentric pump body structure, which adopts the following technical solution: it includes a pump casing, an impeller disposed in the pump casing, and an inlet pipe. The pump casing is provided with a flange for sealing the pump casing opening. The flange is provided with a pipe installation port. The inlet pipe is disposed on the pipe installation port. The axis of the pipe installation port is offset from the axis of the impeller.

[0006] The pump casing is equipped with a flow guide shroud that is coaxial with the impeller, and the flow guide shroud is connected to the liquid inlet pipe through an eccentric part.

[0007] In one specific implementation, the eccentric part includes a receiving part, a first connecting part, and a second connecting part. The first connecting part and the second connecting part are respectively disposed at both ends of the receiving part. The first connecting part is connected to the liquid inlet pipe, and the second connecting part is connected to the flow guide shroud.

[0008] In one specific implementation scheme, a first through hole is provided in the first connecting part, the first through hole communicates with the liquid inlet pipe, and the axis of the first through hole coincides with the axis of the flange.

[0009] In one specific implementation scheme, a guide portion is provided at the end of the first connecting portion away from the receiving portion, and the guide portion is in the shape of a hollow frustum.

[0010] In one specific implementation, the receiving part is provided with a first contact surface facing the side of the inlet pipe.

[0011] In one specific implementation scheme, a second through hole is provided in the second connecting part, the second through hole communicates with the guide shroud, and the axis of the second through hole coincides with the axis of the impeller.

[0012] In one specific implementation scheme, the end of the second connecting portion away from the first connecting portion is provided with a positioning surface facing the air guide shroud.

[0013] In one specific implementation, the end of the second connecting part away from the first connecting part is provided with an annular groove, the flow guide is provided with an annular interface adapted to the annular groove, and the positioning surface is located inside the annular groove.

[0014] In one specific implementation scheme, a first guide portion is provided on the side of the first through hole near the second through hole, and a second guide portion is provided on the side of the second through hole near the first through hole.

[0015] In summary, this application has the following beneficial technical effects: During pump installation, due to the misalignment of the pipeline installation port axis and the impeller axis, the flange width is different at different angles around the inlet pipe. That is to say, the flange area on one side of the inlet pipe is larger, and the flange area on the other side is smaller. The side with the larger area is easier to assemble other components, thereby achieving a sufficiently large area to reasonably install other components without increasing the overall radial dimension of the top surface of the upper pump casing, meeting the installation requirements in confined spaces. Attached Figure Description

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

[0017] Figure 2 This is an exploded view of the structure of this application.

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

[0019] Figure 4 This is a schematic cross-sectional view of the eccentric portion in this application;

[0020] Figure 5 This is a schematic diagram of the structure of the fairing in this application.

[0021] Reference numerals in the attached drawings: 1. Pump casing; 2. Impeller; 3. Inlet pipe; 4. Flange; 41. Pipeline mounting port; 5. Flow guide; 51. Annular interface; 6. Receiving part; 61. First abutment surface; 7. First connecting part; 71. Guide part; 72. First flow guide part; 8. Second connecting part; 81. Positioning surface; 82. Annular groove; 83. Second flow guide part. 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 an eccentric pump body structure, including a pump casing 1, an impeller 2 disposed within the pump casing 1, and an inlet pipe 3. The pump casing 1 is provided with a flange 4 for sealing the opening of the pump casing 1. The flange 4 is provided with a pipe installation port 41, and the inlet pipe 3 is disposed on the pipe installation port 41. The axis of the pipe installation port 41 is misaligned with the axis of the impeller 2 (the axis of the flange 4 coincides with the axis of the impeller 2). Thus, during pump installation, due to the misalignment of the axis of the pipe installation port with the axis of the impeller 2, the width of the flange 4 is different at different angles around the inlet pipe 3. That is, the area of ​​the flange 4 on one side of the inlet pipe 3 is larger, and the area of ​​the flange 4 on the other side is smaller. The side with the larger area is convenient for assembling other components, thereby achieving a sufficiently large area for reasonably assembling other components without increasing the overall radial dimension of the top surface (mounting surface) of the upper pump casing, meeting the installation requirements in a confined space.

[0026] like Figures 2-5As shown, the pump casing 1 is provided with a flow guide shroud 5 coaxially arranged with the impeller 2. The flow guide shroud 5 is connected to the inlet pipe 3 through an eccentric part. Since the outlet end of the inlet pipe 3 and the inlet end of the flow guide shroud 5 are not coaxial, the eccentric part specifically includes a receiving part 6, a first connecting part 7, and a second connecting part 8. The first connecting part 7 and the second connecting part 8 are respectively arranged at both ends of the receiving part 6. The first connecting part 7 is connected to the inlet pipe 3, and the second connecting part 8 is connected to the flow guide shroud 5. The inlet pipe 3 and the flow guide shroud 5 are connected through the first connecting part 7 and the second connecting part 8 at both ends of the receiving part 6, so as to realize the conduction between the inlet pipe 3 and the flow guide shroud 5.

[0027] Among them, such as Figures 2-4 As shown, a first through hole is provided in the first connecting part 7, which communicates with the liquid inlet pipe 3. The axis of the first through hole coincides with the axis of the flange 4. By providing a first through hole in the first connecting part 7 that communicates with the liquid inlet pipe 3, the first connecting part 7 and the liquid inlet pipe 3 are connected. A guide part 71 is provided at the end of the first connecting part 7 away from the receiving part 6. The guide part 71 is in the shape of a hollow frustum, which makes it easy to insert the first connecting part 7 into the liquid inlet pipe 3. In order to facilitate confirmation that the first connecting part 7 and the liquid inlet pipe 3 are inserted in place, a first abutting surface 61 is provided on the receiving part 6 facing the side of the liquid inlet pipe 3. When the end of the liquid inlet pipe 3 abuts against the first abutting surface 61, it is inserted in place, and the connection between the two is completed.

[0028] Among them, such as Figures 2-5 As shown, a second through hole is provided in the second connecting part 8, which communicates with the flow guide shroud 5, and the axis of the second through hole coincides with the axis of the impeller 2. The second connecting part 8 is connected to the flow guide shroud 5 by providing a second through hole that communicates with the liquid inlet pipe 3. Furthermore, a positioning surface 81 facing the flow guide shroud 5 is provided at the end of the second connecting part 8 away from the first connecting part 7. When the first connecting part 8 is connected to the flow guide shroud 5, the connection is complete when the interface of the flow guide shroud 5 reaches the positioning surface 81. A ring groove 82 is provided at the end of the second connecting part 8 away from the first connecting part 7. An annular interface 51 adapted to the annular groove 82 is provided on the flow guide shroud 5. The positioning surface 81 is located in the annular groove 82. Thus, when connecting the flow guide shroud 5, the annular interface 51 on the flow guide shroud 5 is inserted into the annular groove 82. When the annular interface 51 abuts against the positioning surface 81, the connection between the second connecting part 8 and the flow guide shroud 5 is completed.

[0029] like Figure 4As shown, in order to facilitate the smooth flow of liquid through the eccentric part, a first guide part 72 is provided on the side of the first through hole near the second through hole. The first guide part 72 can be a first arc-shaped guide surface that extends obliquely from the wall of the first through hole to the opening of the second through hole. A second guide part 83 is provided on the side of the second through hole near the first through hole. The second guide part can be a second arc-shaped guide surface that extends obliquely from the wall of the second through hole to the opening of the first through hole. The first guide part 72 and the second guide part 83 are arranged opposite to each other. In this way, the first through hole and the second through hole are transitioned by the arc-shaped part, which increases the effective area through which the liquid passes through the through hole, increases the flow area, and reduces the flow resistance.

[0030] A further optimization is the one-piece molding of the eccentric part, which improves the convenience and efficiency of production.

[0031] In summary: During pump installation, due to the misalignment of the axis of the pipeline installation port 41 with the axis of the impeller 2, the width of the flange 4 at different angles around the inlet pipe 3 is different. That is to say, the flange 4 on one side of the inlet pipe 3 has a larger area, while the flange 4 on the other side has a smaller area. The side with the larger area is easier to assemble other components, so that there is a sufficiently large area to reasonably install other components without increasing the overall radial dimension of the top surface (mounting surface) of the upper pump casing, thus meeting the installation requirements in a confined space.

[0032] 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. An eccentric pump body structure, characterized in that: The pump includes a pump casing (1), an impeller (2) disposed inside the pump casing (1), and an inlet pipe (3). The pump casing (1) is provided with a flange (4) for sealing the opening of the pump casing (1). The flange (4) is provided with a pipe installation port (41). The inlet pipe (3) is disposed on the pipe installation port (41). The axis of the pipe installation port (41) is offset from the axis of the impeller (2). The pump casing (1) is provided with a flow guide shroud (5) coaxially arranged with the impeller (2), and the flow guide shroud (5) is connected to the liquid inlet pipe (3) through an eccentric part.

2. The eccentric pump body structure according to claim 1, characterized in that: The eccentric part includes a receiving part (6), a first connecting part (7) and a second connecting part (8). The first connecting part (7) and the second connecting part (8) are respectively disposed at both ends of the receiving part (6). The first connecting part (7) is connected to the liquid inlet pipe (3), and the second connecting part (8) is connected to the flow guide (5).

3. The eccentric pump body structure according to claim 2, characterized in that: The first connecting part (7) is provided with a first through hole, which is connected to the liquid inlet pipe (3), and the axis of the first through hole coincides with the axis of the flange (4).

4. The eccentric pump body structure according to claim 3, characterized in that: The first connecting part (7) is provided with a guide part (71) at one end away from the receiving part (6), and the guide part (71) is in the shape of a hollow frustum.

5. The eccentric pump body structure according to claim 2, characterized in that: The receiving part (6) is provided with a first contact surface (61) facing the side of the liquid inlet pipe (3).

6. The eccentric pump body structure according to claim 3, characterized in that: The second connecting part (8) is provided with a second through hole, which is connected to the flow guide (5), and the axis of the second through hole coincides with the axis of the impeller (2).

7. The eccentric pump body structure according to claim 6, characterized in that: The second connecting part (8) has a positioning surface (81) facing the flow guide (5) at one end away from the first connecting part (7).

8. The eccentric pump body structure according to claim 7, characterized in that: The second connecting part (8) is provided with an annular groove (82) at one end away from the first connecting part (7), and the flow guide (5) is provided with an annular interface (51) adapted to the annular groove (82), and the positioning surface (81) is located in the annular groove (82).

9. The eccentric pump body structure according to claim 6, characterized in that: A first guide portion (72) is provided on the side of the first through hole near the second through hole, and a second guide portion (83) is provided on the side of the second through hole near the first through hole.

10. The eccentric pump body structure according to claim 1, characterized in that: The eccentric part is integrally formed.

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