A centrifugal pump impeller dismounting tool

Abstract

This utility model discloses a centrifugal pump impeller disassembly tool, relating to the field of centrifugal pump impeller disassembly technology, aiming to solve the problems of time-consuming and laborious disassembly of traditional centrifugal pump impellers, easy damage to components, and unsafe operation. The tool includes pull rods, adjusting plates, positioning nuts, positioning washers, fastening nuts, fastening washers, push rods, and a pump body. The pump body has an outlet flange, and the pump shaft of the pump body is connected to the impeller via a key. Two pull rods, one end L-shaped and the other end externally threaded, are installed on the impeller at a 180° angle. After sequentially fitting the adjusting plate, positioning washers, and fastening washers, the positioning nuts and fastening nuts are screwed in. The unthreaded end of the push rod abuts against the pump shaft, and the impeller is disassembled by tightening the fastening nuts. It is safe and reliable, reduces labor intensity, improves maintenance efficiency, has a reasonable structure, and can also be used for disassembling low-power fan impellers. It requires no multiple people or repeated hammering; a single person can complete the operation, significantly reducing manpower input and physical exertion.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump impeller disassembly technology, and in particular to a centrifugal pump impeller disassembly tool. Background Technology

[0002] The centrifugal pump impeller is the core component of a centrifugal pump, playing a crucial role in transferring mechanical energy to the liquid. Its high-speed rotation imparts static and kinetic energy to the liquid. Currently, when disassembling a centrifugal pump impeller, repair personnel typically place the pump on a specialized maintenance frame. One person uses tools to secure the coupling, while another uses a pry bar and hammer to tap the pump body. Only after repeated tapping can the pump and impeller be removed. This disassembly method is not only time-consuming and labor-intensive, requiring multiple people to operate, but it also easily causes significant external damage to the pump body and impeller. In severe cases, it can even render the pump unusable, resulting in inconvenient operation, low safety, and high maintenance costs. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a centrifugal pump impeller disassembly tool, which solves the technical problems of traditional centrifugal pump impeller disassembly being time-consuming and labor-intensive, requiring multiple people to cooperate, easily causing significant damage to the pump body and impeller, and being unsafe to operate.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A centrifugal pump impeller disassembly tool includes a pull rod, an adjusting plate, a positioning nut, a positioning washer, a fastening nut, a fastening washer, a push rod, and a pump body. The pump body is provided with an outlet flange, and the pump shaft of the pump body is connected to the impeller via a key. One end of the tie rod has an L-shaped structure, and the other end has an external thread. The L-shaped end is used to connect with the impeller. There are two tie rods, and the two tie rods are installed at 180° angles on the impeller; The adjusting plate, positioning shim, positioning nut, and fastening shim are sequentially fitted onto the external threaded ends of the two pull rods. The positioning nut and fastening nut are threadedly connected to the external threaded ends of the pull rods. The positioning nut is used to position the adjusting plate, and the fastening nut is used to fix the adjusting plate and fastening shim. One end of the push rod is unthreaded and is used to abut against the pump shaft; the other end passes through the adjusting plate and is engaged with the adjusting plate. The impeller is located inside the pump body.

[0005] Preferably, the end of the push rod away from the pump shaft is provided with an external thread, and an adjusting nut and an adjusting washer are also fitted on the push rod. The adjusting nut is threadedly connected to the external thread end of the push rod to adjust the force of the push rod against the pump shaft.

[0006] Preferably, the positioning shim is located between the adjusting plate and the positioning nut to enhance the positioning stability of the adjusting plate by the positioning nut.

[0007] Preferably, this disassembly tool is also suitable for disassembling the impeller of low-power fans and is compatible with the corresponding impeller, shaft and housing structure of the fans.

[0008] Compared with the prior art, the present invention has the following beneficial effects: Safe and reliable: This utility model achieves smooth disassembly of the impeller through the cooperation of components such as pull rod, adjusting plate, and push rod, avoiding damage to the pump body and impeller caused by traditional hammering methods and reducing safety hazards during operation.

[0009] Reduced labor intensity: No need for multiple people to cooperate or repeated hammering, a single person can complete the operation, significantly reducing manpower input and physical exertion.

[0010] Improved maintenance efficiency: The impeller can be quickly removed from the pump shaft by tightening the fastening nut, simplifying the disassembly process and shortening maintenance time.

[0011] Reasonable structure: Each component is designed simply and fits tightly. For example, the two tie rods are distributed at 180° to ensure force balance, and the abutment design between the push rod and the pump shaft enhances stability. The overall structure is simple, easy to manufacture and operate.

[0012] Wide range of applications: It is not only suitable for disassembling centrifugal pump impellers, but also for disassembling impellers on low-power fans, expanding the application scenarios of the tool. Attached Figure Description

[0013] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0014] Figure 1 This is a structural schematic diagram of an embodiment of the impeller disassembly tool of this utility model.

[0015] Figure 2 This is a structural schematic diagram of the impeller disassembly tool of this utility model.

[0016] Legend: 1. Outlet flange; 2. Adjusting plate; 3. Positioning gasket; 4. Tie rod; 5. Positioning nut; 6. Top rod; 7. Fastening nut; 8. Fastening gasket; 9. Impeller; 10. Pump body; 11. Pump shaft. Detailed Implementation

[0017] This application provides a centrifugal pump impeller disassembly tool, which effectively solves the technical problems of traditional centrifugal pump impeller disassembly being time-consuming and labor-intensive, requiring multiple people to cooperate, easily causing significant damage to the pump body and impeller, and being unsafe to operate. Example

[0018] like Figure 1 , Figure 2 As shown, the overall technical solution in this application embodiment is as follows: To address the problems existing in the prior art, the centrifugal pump impeller (key connection) disassembly tool of this utility model is suitable for disassembling the impeller 9 installed inside the pump body 10 and connected to the pump shaft 11 by a key, and is adapted to the pump body 10 with an outlet flange 1. Its specific composition and usage process are as follows: The disassembly tools include a pull rod 4, an adjusting plate 2, a positioning nut 5, a positioning washer 3, a fastening nut 7, a fastening washer 8, and a push rod 6. The pull rod 4 has an L-shaped structure at one end for connecting to the impeller 9, and an external thread at the other end for mounting other components. The push rod 6 has a threadless structure at one end for abutting against the pump shaft 11, and an external thread at the other end that passes through and mates with the adjusting plate 2. The push rod 6 also has an adjusting nut and an adjusting washer fitted on it. The adjusting nut is threaded to the external threaded end of the push rod 6 to adjust the force with which the push rod 6 abuts against the pump shaft 11.

[0019] During disassembly, first remove the pump cover of the centrifugal pump, take two tie rods 4, and install their L-shaped ends on the impeller 9 respectively, with the two tie rods 4 installed at 180° angles on the impeller 9 to ensure force balance. Then, install the adjusting plate 2 and the positioning washer 3 on the external threaded ends of the two tie rods 4 in sequence, and screw in the positioning nut 5. The position of the adjusting plate 2 is fixed by the cooperation of the positioning nut 5 and the positioning washer 3. Next, install the fastening washer 8 on the external threaded ends of the tie rods 4 and screw in the fastening nut 7.

[0020] When appropriate, place the unthreaded end of the push rod 6 against the pump shaft 11, and adjust the adjusting nut and adjusting shim on the push rod 6 to make the push rod 6 stably abut against the pump shaft 11; then tighten the fastening nut 7 again. Through the cooperation of the fastening nut 7 and the fastening shim 8, the pull rod 4 is driven to pull the impeller 9. At the same time, the push rod 6 forms a reverse support for the pump shaft 11. Under the combined action of the two, the impeller 9 can be safely and smoothly removed from the pump shaft 11.

[0021] In addition, this disassembly tool is not only suitable for disassembling the centrifugal pump impeller 9, but can also be adapted to the corresponding impeller, shaft and housing structure of low-power fans, and is used for disassembling the impeller on low-power fans.

[0022] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A centrifugal pump impeller disassembly tool, characterized in that, It includes a tie rod (4), an adjusting plate (2), a positioning nut (5), a positioning washer (3), a fastening nut (7), a fastening washer (8), a push rod (6), and a pump body (10). The pump body (10) is provided with an outlet flange (1), and the pump shaft (11) of the pump body (10) is connected to an impeller (9) by a key. One end of the pull rod (4) is an L-shaped structure, and the other end is provided with an external thread. The L-shaped end is used to connect with the impeller (9); There are two tie rods (4), and the two tie rods (4) are installed at 180° on the impeller (9); Adjusting plate (2), positioning shim (3), positioning nut (5), and fastening shim (8) are sequentially fitted onto the external thread ends of the two pull rods (4). The positioning nut (5) and fastening nut (7) are threadedly connected to the external thread ends of the pull rods (4). The positioning nut (5) is used to position the adjusting plate (2), and the fastening nut (7) is used to fix the adjusting plate (2) and fastening shim (8). One end of the push rod (6) is a threadless structure, which is used to abut against the pump shaft (11), and the other end passes through the adjustment plate (2) and cooperates with the adjustment plate (2); The impeller (9) is located inside the pump body (10).

2. The disassembly tool according to claim 1, characterized in that: The end of the push rod (6) away from the pump shaft (11) is provided with an external thread. An adjusting nut and an adjusting washer are also fitted on the push rod (6). The adjusting nut is threaded to the external thread end of the push rod (6) to adjust the force of the push rod (6) against the pump shaft (11).

3. The disassembly tool according to claim 1 or 2, characterized in that: The positioning shim (3) is located between the adjusting plate (2) and the positioning nut (5) to enhance the positioning stability of the positioning nut (5) on the adjusting plate (2).

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