A vertical multistage centrifugal pump fluid guide support structure

Abstract

This utility model relates to the field of multistage centrifugal pump technology and provides a vertical multistage centrifugal pump fluid guide support structure, including a main unit, a mounting frame installed below the main unit, a guide cylinder fixed at the center of one side of the mounting frame, an outlet fixed on the upper side of the bottom of the guide cylinder, a rotating shaft installed at the center of the inner part of the guide cylinder, mounting cylinders evenly distributed outside the rotating shaft, and guide vanes evenly distributed outside the mounting cylinders. This utility model, through the setting of a tightening screw and an adjusting sleeve, after the mounting cylinders are installed, reinforces the connection between the mounting cylinders and the rotating shaft from both sides of the mounting cylinders through limiting rings. The threaded structure between the tightening screw and the adjusting sleeve allows adjustment of the distance between the limiting rings. In case of loosening, the connection between the mounting cylinders and the rotating shaft can be adjusted directly by rotating the tightening screw.

Description

Technical Field

[0001] This utility model belongs to the field of multistage centrifugal pump technology, and particularly relates to a fluid guide support structure for a vertical multistage centrifugal pump. Background Technology

[0002] A multistage centrifugal pump is a type of pump that integrates the motor and pump body into one unit and is immersed in a groundwater well to draw and transport water. It is widely used in farmland irrigation and drainage, industrial and mining enterprises, urban water supply and drainage, and sewage treatment.

[0003] Application No. 202322963305.X discloses a fluid guide support structure for a multi-stage centrifugal pump. The fluid guide contains guide vanes, and a pump shaft support sleeve is fixedly mounted in the middle of the guide vanes. The fluid guide shares a central axis with the support sleeve. During pump shaft rotation, the support sleeve provides radial support, increasing the radial support strength of the pump shaft. Simultaneously, by sharing a central axis with the support sleeve, the central axis of the fluid guide becomes the central axis of the support sleeve. When multiple fluid guides are arranged sequentially within the multi-stage centrifugal pump, the central axis of the support sleeve is machined to ensure that the fluid guides are positioned with the center of the support sleeve as their central axis, both at the center and on the periphery. This improves the accuracy of the fluid guide's central axis positioning, reduces the center deviation of different fluid guides in a sequential arrangement, and enhances the rotational stability of the multi-stage centrifugal pump. This invention also provides a multi-stage centrifugal pump.

[0004] Existing multistage centrifugal pumps have relatively fixed internal component connections, which can ensure stability during the initial use. However, as the usage time increases, the connections may loosen, and the connection method makes it impossible to adjust the connections, thus affecting the subsequent use performance. Utility Model Content

[0005] This invention provides a fluid guide support structure for a vertical multistage centrifugal pump, aiming to solve the problem that existing multistage centrifugal pumps cannot adjust the connection.

[0006] This utility model is implemented as follows: a vertical multistage centrifugal pump fluid guide support structure includes a main unit, an mounting frame installed below the main unit, a guide cylinder fixed at the center of the opposite side of the mounting frame, an outlet fixed on the upper side of the bottom of the guide cylinder, a rotating shaft installed at the center inside the guide cylinder, mounting cylinders evenly distributed outside the rotating shaft, and guide vanes evenly distributed outside the mounting cylinders.

[0007] Limiting rings are installed on both sides of the mounting cylinder. An adjusting sleeve is fixed on the opposite side of the limiting ring. A tightening screw is rotatably connected to one side of the adjusting sleeve. A tightening buckle is fixed to the outside of the center of the tightening screw.

[0008] Preferably, the adjusting sleeve has equidistant positioning grooves on the side near the center, and a positioning cone is installed inside the positioning groove. The positioning cone is rotatably connected to the mounting groove inside the rotating shaft.

[0009] Preferably, the limiting rings are arranged in a relative moving structure through an adjusting sleeve and a tightening screw, and the surface of the opposite side of the limiting ring is in close contact with the surface of the mounting cylinder.

[0010] Preferably, the outer side of the rotating shaft away from the center of the mounting cylinder has a positioning ring, and positioning blocks are evenly distributed on the side of the positioning ring closer to the center of the mounting cylinder.

[0011] Preferably, the positioning block is embedded inside the limiting ring, and the center line of the limiting ring, the positioning ring piece, and the mounting cylinder coincides with the center line of the rotating shaft.

[0012] Preferably, a tightening ring is provided on the side of the positioning ring away from the center of the mounting cylinder, and connecting rods are equidistantly distributed on the outer side of the mounting cylinder away from the center.

[0013] Preferably, the inner surface of the tightening ring is threaded to the outer surface of the rotating shaft, and the two ends of the connecting rod are respectively connected to the mounting cylinder and the guide cylinder.

[0014] Compared with the prior art, the embodiments of this application have the following main advantages:

[0015] 1. This utility model, through the setting of tightening screw and adjusting sleeve, after the installation of the mounting cylinder is completed, reinforces the connection between the mounting cylinder and the rotating shaft from both sides of the mounting cylinder by limiting rings. The threaded structure between the tightening screw and the adjusting sleeve can adjust the distance between the limiting rings. In case of loosening, the connection between the mounting cylinder and the rotating shaft can be adjusted directly by rotating the tightening screw.

[0016] 2. This utility model, through the setting of positioning ring and tightening ring, provides a buffer in the event of local loosening, allowing the device to continue to be used and giving maintenance personnel time to maintain it, thus avoiding direct damage to the device itself. The tightening ring can strengthen the connection between parts. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the guide tube structure of this utility model;

[0019] Figure 3 This is a cross-sectional view of the rotating shaft of this utility model;

[0020] Figure 4 This is an exploded structural diagram of the present invention;

[0021] Figure 5 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Main unit; 2. Mounting bracket; 3. Flow guide tube; 4. Outlet; 5. Rotating shaft; 6. Mounting cylinder; 7. Flow guide vane; 8. Limiting ring; 9. Adjusting sleeve; 10. Tightening screw; 11. Tightening buckle; 12. Positioning cone; 13. Mounting groove; 14. Positioning ring piece; 15. Positioning block; 16. Tightening ring; 17. Connecting rod. Detailed Implementation

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] This utility model embodiment provides a fluid guide support structure for a vertical multistage centrifugal pump, such as... Figures 1-5 As shown, the device includes a main unit 1, a mounting bracket 2 installed below the main unit 1, a guide tube 3 fixed at the center of the opposite side of the mounting bracket 2, an outlet 4 fixed at the upper side of the bottom of the guide tube 3, a rotating shaft 5 installed at the center inside the guide tube 3, mounting tubes 6 evenly distributed outside the rotating shaft 5, and guide vanes 7 evenly distributed outside the mounting tubes 6.

[0026] It should be noted that, due to the relatively fixed connections between internal parts in existing multistage centrifugal pumps, stability can be ensured during the initial use. However, as the usage time increases, the connections may loosen, and the connection method makes it impossible to adjust the connections, thus affecting the subsequent performance. In this solution, the vertical multistage centrifugal pump is mainly composed of a main unit 1, a guide tube 3, and a mounting frame 2. Inside the guide tube 3, a guide vane 7 is installed. The guide vane 7 is powered by the main unit 1 and the rotating shaft 5 to rotate, and transfers the liquid through the outlet 4.

[0027] In a further preferred embodiment of this utility model, such as Figure 1 and Figure 2 as well as Figure 3 As shown, limit rings 8 are installed on both sides of the mounting cylinder 6. An adjusting sleeve 9 is fixed to the opposite side of the limit ring 8. A tightening screw 10 is rotatably connected to one side of the adjusting sleeve 9. A tightening buckle 11 is fixed to the outside of the center of the tightening screw 10. The adjusting sleeve 9 has equidistant positioning grooves on the inner side near the center. A positioning cone 12 is installed inside the positioning groove and is rotatably connected to the mounting groove 13 in the rotating shaft 5. The limit rings 8 form a relative moving structure through the adjusting sleeve 9 and the tightening screw 10, and the surface of the opposite side of the limit ring 8 is in close contact with the surface of the mounting cylinder 6.

[0028] In this embodiment, the limiting ring 8 is sleeved on both sides of the mounting cylinder 6. The tightening screw 10 is rotated by the tightening buckle 11. The distance between the limiting rings 8 is adjusted by the threaded connection between the tightening screw 10 and the adjusting sleeve 9 to ensure that the limiting rings 8 and the mounting cylinder 6 fit tightly together and fix the mounting cylinder 6. The positioning cone 12 can be used to position the limiting rings 8 and the rotating shaft 5.

[0029] In a further preferred embodiment of this utility model, such as Figure 2 and Figure 3 as well as Figure 4 As shown, a positioning ring 14 is located on the outer side of the rotating shaft 5 away from the center of the mounting cylinder 6. Positioning blocks 15 are evenly distributed on the side of the positioning ring 14 closer to the center of the mounting cylinder 6. The positioning blocks 15 are embedded inside the limiting ring 8. The center lines of the limiting ring 8, the positioning ring 14, and the mounting cylinder 6 coincide with the center line of the rotating shaft 5. A tightening ring 16 is provided on the side of the positioning ring 14 away from the center of the mounting cylinder 6. Connecting rods 17 are evenly distributed on the outer side of the mounting cylinder 6 away from the center. The inner surface of the tightening ring 16 is threaded to the outer surface of the rotating shaft 5. The two ends of the connecting rods 17 are connected to the mounting cylinder 6 and the guide cylinder 3, respectively.

[0030] In this embodiment, the positioning ring 8 is positioned and installed using the positioning ring 14 and the positioning block 15 to prevent loosening or misalignment during use. Meanwhile, the protective cover 18 is connected to the outside of the guide vane 7 via the connecting rod 17. The protective cover 18 protects the internal parts from the outside of the guide vane 7. Simultaneously, the threaded connection between the tightening ring 16 and the rotating shaft 5 allows for rotational connection from the outside of the rotating shaft towards the center, resulting in a tighter connection between the mounting cylinder 6, the limiting ring 8, and the positioning ring 14, ensuring effective use. Furthermore, if loosening occurs later, simply rotating the tightening ring 16 will reinforce the parts.

[0031] In summary, the vertical multistage centrifugal pump is mainly composed of a main unit 1, a guide tube 3, and a mounting frame 2. Guide vanes 7 are installed inside the guide tube 3. The guide vanes 7 are powered by the main unit 1 and the rotating shaft 5, and transfer liquid through the outlet 4. Limiting rings 8 are fitted onto both sides of the mounting cylinder 6. The tightening screw 10 is rotated by the tightening buckle 11, and the distance between the limiting rings 8 is adjusted through the threaded connection between the tightening screw 10 and the adjusting sleeve 9 to ensure a tight fit between the limiting rings 8 and the mounting cylinder 6, thus fixing the mounting cylinder 6. The positioning cone 12 further secures the connection between the limiting rings 8 and the rotating shaft 5. Positioning is achieved by using positioning ring 14 and positioning block 15 to position and install the limiting ring 8, preventing loosening or misalignment during use. Simultaneously, the guide tube 3 is connected to the outside of the guide vane 7 via connecting rod 17, allowing the guide tube 3 to protect the internal parts from the outside of the guide vane 7. Furthermore, the threaded connection between the tightening ring 16 and the rotating shaft 5 allows for rotational connection from the outside of the rotating shaft towards the center, resulting in a tighter connection between the mounting tube 6, the limiting ring 8, and the positioning ring 14, ensuring optimal performance. In case of loosening later, simply rotating the tightening ring 16 will reinforce the parts.

[0032] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0033] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units described above may be implemented in other ways in practice. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0034] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0035] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A fluid guide support structure for a vertical multistage centrifugal pump, comprising a main unit (1), characterized in that: A mounting bracket (2) is installed below the main unit (1). A guide tube (3) is fixed at the center of the opposite side of the mounting bracket (2). An outlet (4) is fixed on the upper side of the bottom of the guide tube (3). A rotating shaft (5) is installed at the center inside the guide tube (3). Mounting cylinders (6) are distributed at equal intervals outside the rotating shaft (5). Guide vanes (7) are distributed at equal intervals outside the mounting cylinders (6). Limiting rings (8) are installed on both sides of the mounting cylinders (6). An adjusting sleeve (9) is fixed on the opposite side of the limiting rings (8). A tightening screw (10) is rotatably connected to one side of the adjusting sleeve (9). A tightening buckle (11) is fixed on the outside of the center of the tightening screw (10).

2. The fluid guide support structure for a vertical multistage centrifugal pump according to claim 1, characterized in that: The adjusting sleeve (9) has equidistant positioning grooves on the side near the center. A positioning cone (12) is installed inside the positioning groove. The positioning cone (12) is rotatably connected to the mounting groove (13) inside the rotating shaft (5).

3. The fluid guide support structure for a vertical multistage centrifugal pump according to claim 1, characterized in that: The limiting rings (8) are connected by an adjusting sleeve (9) and a tightening screw (10) to form a relative moving structure, and the surface of the limiting rings (8) on the opposite side is in close contact with the surface of the mounting cylinder (6).

4. The fluid guide support structure for a vertical multistage centrifugal pump according to claim 1, characterized in that: The rotating shaft (5) has a positioning ring (14) on the side away from the center of the mounting cylinder (6), and positioning blocks (15) are distributed at equal intervals on the side of the positioning ring (14) close to the center of the mounting cylinder (6).

5. The fluid guide support structure for a vertical multistage centrifugal pump according to claim 4, characterized in that: The positioning block (15) is embedded inside the limiting ring (8), and the center lines of the limiting ring (8), the positioning ring piece (14), and the mounting cylinder (6) coincide with the center line of the rotating shaft (5).

6. The fluid guide support structure for a vertical multistage centrifugal pump according to claim 4, characterized in that: A tightening ring (16) is provided on the side of the positioning ring (14) away from the center of the mounting cylinder (6), and connecting rods (17) are distributed at equal intervals on the outer side of the mounting cylinder (6) away from the center.

7. The fluid guide support structure for a vertical multistage centrifugal pump according to claim 6, characterized in that: The inner surface of the tightening ring (16) is threaded to the outer surface of the rotating shaft (5), and the two ends of the connecting rod (17) are respectively connected to the mounting cylinder (6) and the guide cylinder (3).

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