Improved structure of dismounting centrifugal pump cover

Abstract

This utility model discloses an improved structure for disassembling centrifugal pump covers, relating to the field of centrifugal pump disassembly technology. It aims to solve the problems of difficult disassembly, time-consuming and labor-intensive processes, low safety, and increased costs associated with traditional centrifugal pump cover disassembly. The structure includes the original centrifugal pump structure and disassembly components. These components include a guide rod thread, a positioning nut, a positioning washer, a fastening washer, a fastening nut, a guide rod, an adjusting washer, an adjusting nut, a push rod, an adjusting plate, and a conical top plate. By installing the guide rod into the push screw hole, and sequentially assembling the positioning, fastening, and adjusting components, applying force using the adjusting nut, and cooperating with the conical top plate to prevent impeller damage and push rod misalignment, the pump cover can be smoothly disassembled. This utility model is safe and reliable, requiring only two people and half an hour to complete the operation, significantly reducing labor intensity and improving maintenance efficiency. It has a reasonable structure and good performance, and can also be extended to the disassembly of fan impeller assemblies.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump disassembly technology, and in particular to an improved structure for disassembling the pump cover of a centrifugal pump. Background Technology

[0002] Centrifugal pumps are important conveying equipment widely used in industrial production. They are mainly used to transport liquids or acid-base mixtures through pipelines to high places or distant locations. They are mainly composed of pump cover, pump body, impeller, shaft sleeve, coupling, seal, etc. The pump cover is located between the front end of the pump body and the inlet pipe flange. The weight and size of the pump cover vary between different models.

[0003] During the production and operation of centrifugal pumps, when maintenance is required due to impeller damage, bearing failure, seal leakage, pump body leakage, or other malfunctions, disassembling the pump cover is a crucial step. Currently, the traditional disassembly methods used by maintenance personnel have several problems: the pump cover mounting bolts must be removed first, then the set screws must be screwed into the set screw holes; multiple people must simultaneously apply force to evenly tighten the set screws, and the distance between the two sides must be measured in real time to prevent deviation; for larger pumps, more personnel are often needed; if the pumped medium is acidic or alkaline, corrosion can easily occur between the pump cover and the pump body, further increasing the difficulty of disassembly.

[0004] Furthermore, in traditional methods, the threads of the set screw are prone to damage during tightening, leading to set screw failure. The pump cover typically has only two set screw threads around its circumference; if one is damaged, the other cannot be used independently. If the pump cover cannot be removed, the entire pump may be rendered unusable, increasing equipment and maintenance costs and disrupting production. Additionally, the operation is labor-intensive and time-consuming (often requiring several consecutive days to complete), and there is a risk of safety accidents due to improper operation. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an improved structure for disassembling centrifugal pump covers, which solves the technical problems of difficult disassembly, time-consuming and labor-intensive processes, increased costs, safety risks for repair personnel, easy damage to set screws, and potential pump failure due to inability to disassemble the pump cover during maintenance.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An improved structure for disassembling a centrifugal pump cover includes a centrifugal pump and a disassembly assembly. The centrifugal pump includes an outlet flange, a pump body, a pump cover, an inlet flange, an impeller, a pump shaft, a set screw hole one, and a set screw hole two. The disassembly assembly includes a guide rod thread, a positioning nut, a positioning washer, a fastening washer, a fastening nut, a guide rod, an adjusting washer, an adjusting nut, a top rod, an adjusting plate, and a conical top plate. The pump body is equipped with an outlet flange, and the pump cover is located at the front end of the pump body and adjacent to the inlet flange; The pump shaft passes through the pump body, and the impeller is sleeved on the pump shaft and located inside the pump body; The pump cover is provided with set screw hole one and set screw hole two; The outer wall of the guide rod is provided with a guide rod thread, and the guide rod passes through the set screw hole one and the set screw hole two; The positioning nut is screwed into the guide rod near the pump cover through the guide rod thread, and the positioning washer is sleeved on the guide rod with one side abutting against the positioning nut; A conical top plate is fitted onto a guide rod, with one side facing the impeller and the other side abutting against one end of the top rod; The other end of the push rod abuts against one side of the adjusting plate, and the other side of the adjusting plate abuts against the fastening washer sleeved on the guide rod; The fastening nut is screwed into the guide rod through the guide rod thread, and one side of the nut abuts against the side of the fastening washer away from the adjusting plate; The adjusting shim is fitted onto the guide rod, with one side abutting against the side of the fastening nut away from the fastening shim. The adjusting nut is screwed into the end of the guide rod away from the positioning nut through the guide rod thread, with one side of the adjusting shim abutting against the side of the adjusting shim away from the fastening nut.

[0007] Preferably, the conical top plate is configured to correspond to the impeller, which is used to prevent impeller damage and impeller displacement when the push rod is under force.

[0008] Preferably, the structure can also be used for disassembling the impeller assembly of the wind turbine while maintaining the connection relationship between the components.

[0009] Compared with the prior art, the present invention has the following beneficial effects: Safe and reliable, reducing risks: This utility model avoids problems such as bent set screws and damaged threads in traditional methods through reasonable structural design (conical top plate to avoid impeller damage and top rod displacement), reduces the risk of component damage, and at the same time reduces safety hazards during operation, ensuring the safety of maintenance personnel.

[0010] Reduce labor intensity and improve efficiency: Traditional methods require multiple people to work together and take several days, while this utility model only requires two people to operate and can complete the pump cover disassembly in half an hour, which greatly shortens the maintenance time, significantly reduces the labor intensity of maintenance personnel, and improves maintenance efficiency.

[0011] Reasonable structure and good performance: The overall structure is simple and reasonably designed. Through the cooperation of components such as guide rod, top rod, and adjusting nut, the pump cover can be disassembled smoothly and easily, avoiding the situation where the pump body is scrapped due to difficult disassembly, and reducing equipment costs and maintenance expenses.

[0012] Wide range of applications: It is not only suitable for the disassembly of centrifugal pump covers, but can also be extended to the disassembly of impeller assemblies of fans, making it widely applicable. 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 schematic diagram of the centrifugal pump cover structure in an embodiment not described in the invention.

[0015] Figure 2 This is a schematic diagram of the disassembly of the centrifugal pump cover according to an embodiment of the present invention.

[0016] Legend: 1. Outlet flange; 2. Pump body; 3. Pump cover; 4. Guide rod thread; 5. Locating nut; 6. Locating washer; 7. Fastening washer; 8. Fastening nut; 9. Guide rod; 10. Adjusting shim; 11. Adjusting nut; 12. Top rod; 13. Adjusting plate; 14. Inlet method; 15. Conical top plate; 16. Impeller; 17. Pump shaft; 18. Top screw hole one; 19. Top screw hole two. Detailed Implementation

[0017] This application provides an improved structure for disassembling centrifugal pump covers, which effectively solves the technical problems of difficult disassembly, time-consuming and labor-intensive disassembly, increased costs, unsafe conditions for repair personnel, easy damage to the set screws, and potential pump failure due to inability to disassemble the pump cover during maintenance. 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, this utility model provides an improved structure for disassembling a centrifugal pump cover, aiming to solve the problems of time-consuming and laborious disassembly, low safety, and easily damaged parts during the traditional centrifugal pump cover disassembly process. Its structure includes the original centrifugal pump structure and disassembly components. The component numbers and connection relationships are as follows: The original structure of the centrifugal pump includes: outlet flange 1, pump body 2, pump cover 3, inlet flange 14, impeller 16, pump shaft 17, set screw hole 18, and set screw hole 19. The outlet flange 1 is located on one side of the pump body 2, and the pump cover 3 is located at the front end of the pump body 2 and adjacent to the inlet flange 14. The pump shaft 17 is horizontally inserted inside the pump body 2, and the impeller 16 is sleeved on the pump shaft 17 and located inside the pump body 2; the pump cover 3 is symmetrically provided with a first set screw hole 18 and a second set screw hole 19 to provide an installation base for disassembling the components.

[0019] Disassembly components include: guide rod thread 4, positioning nut 5, positioning washer 6, fastening washer 7, fastening nut 8, guide rod 9, adjusting washer 10, adjusting nut 11, top rod 12, adjusting plate 13, and conical top plate 15. The guide rod 9 has guide rod threads 4 machined on its outer wall to match the various nuts, enabling threaded connections between the components.

[0020] Assembly steps: Guide rod installation: Insert the guide rod 9 into the set screw hole 18 and set screw hole 19 on the pump cover 3 respectively to ensure that the guide rod 9 and the set screw hole are stably matched and provide support for subsequent components.

[0021] Positioning component installation: At the end of the guide rod 9 near the pump cover 3, screw the positioning nut 5 into the guide rod thread 4; put the positioning washer 6 on the guide rod 9 so that one side of it abuts against the positioning nut 5. Through the cooperation of the positioning nut 5 and the positioning washer 6, the displacement of the guide rod 9 near the pump cover 3 is restricted, ensuring the initial positioning stability of the overall structure.

[0022] Installation of force transmission components: The conical top plate 15 is fitted onto the guide rod 9, with one side facing the impeller 16 inside the pump body 2 and the other side abutting against one end of the push rod 12; the conical top plate 15 is set to avoid the push rod 12 directly contacting the impeller 16 when under force and causing damage, and at the same time to prevent the push rod 12 from shifting during the force process, so as to ensure the stability of the force transmission direction.

[0023] Installation of fastening and adjustment components: The other end of the top rod 12 abuts against one side of the adjustment plate 13, and the other side of the adjustment plate 13 abuts against the fastening washer 7 sleeved on the guide rod 9; the fastening nut 8 is screwed into the guide rod 9 through the guide rod thread 4, so that one side of it abuts against the side of the fastening washer 7 away from the adjustment plate 13. Through the cooperation of the fastening washer 7 and the fastening nut 8, the adjustment plate 13, the top rod 12 and other components are clamped and fixed; on the side of the fastening nut 8 away from the fastening washer 7, the adjustment washer 10 is sleeved, and the adjustment nut 11 is screwed into it through the guide rod thread 4, so that one side of the adjustment nut 11 abuts against the adjustment washer 10. The adjustment washer 10 is used to buffer the force between the adjustment nut 11 and the fastening nut 8 to avoid wear caused by direct contact.

[0024] Disassembly process: After assembly, by tightening the adjusting nut 11, the adjusting nut 11 moves towards the fastening nut 8 through the transmission action of the guide rod thread 4. The adjusting shim 10 pushes the fastening nut 8, which in turn drives the fastening shim 7, adjusting plate 13, and push rod 12 to apply axial force towards the pump cover 3 in sequence. The force of the push rod 12 is transmitted to the pump body 2 side where the impeller 16 is located through the conical top plate 15. At the same time, the positioning nut 5 and positioning shim 6 provide reverse support for the pump cover 3. Under the action of the reverse force, the pump cover 3 gradually separates from the pump body 2, and finally the pump cover 3 can be easily removed.

[0025] The entire disassembly process requires only two people and can be completed in about 30 minutes, which significantly shortens the time compared to traditional methods and avoids problems such as bent set screws and damaged threads.

[0026] Extended applications: The structure of this utility model is not only applicable to the disassembly of centrifugal pump covers, but can also be directly used for the disassembly of fan impeller assemblies. At this time, the connection relationship of each component remains unchanged, and only the component specifications need to be adjusted according to the size of the fan impeller assembly, which has wide applicability.

[0027] 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. An improved structure for disassembling a centrifugal pump cover, comprising a centrifugal pump and a disassembly assembly, wherein the centrifugal pump includes an outlet flange (1), a pump body (2), a pump cover (3), an inlet flange (14), an impeller (16), a pump shaft (17), a first set screw hole (18), and a second set screw hole (19), characterized in that, The disassembly components include guide rod thread (4), positioning nut (5), positioning washer (6), fastening washer (7), fastening nut (8), guide rod (9), adjusting washer (10), adjusting nut (11), top rod (12), adjusting plate (13), and conical top plate (15). The pump body (2) is provided with an outlet flange (1), and the pump cover (3) is located at the front end of the pump body (2) and adjacent to the inlet flange (14); The pump shaft (17) passes through the pump body (2), and the impeller (16) is sleeved on the pump shaft (17) and located inside the pump body (2); The pump cover (3) is provided with a set screw hole one (18) and a set screw hole two (19); The outer wall of the guide rod (9) is provided with a guide rod thread (4), and the guide rod (9) passes through the first set screw hole (18) and the second set screw hole (19); The positioning nut (5) is screwed into the guide rod (9) near the pump cover (3) through the guide rod thread (4), and the positioning washer (6) is sleeved on the guide rod (9) and one side abuts against the positioning nut (5); A conical top plate (15) is fitted onto a guide rod (9), with one side facing the impeller (16) and the other side abutting against one end of the top rod (12).

2. The improved structure for disassembling the centrifugal pump cover according to claim 1, characterized in that, The other end of the top rod (12) abuts against one side of the adjusting plate (13), and the other side of the adjusting plate (13) abuts against the fastening washer (7) sleeved on the guide rod (9).

3. The improved structure for disassembling the centrifugal pump cover according to claim 2, characterized in that, The fastening nut (8) is screwed into the guide rod (9) through the guide rod thread (4), and one side of it abuts against the side of the fastening washer (7) away from the adjusting plate (13).

4. The improved structure for disassembling the centrifugal pump cover according to claim 3, characterized in that, The adjusting shim (10) is fitted onto the guide rod (9) and one side of it abuts against the side of the fastening nut (8) away from the fastening shim (7). The adjusting nut (11) is screwed into the end of the guide rod (9) away from the positioning nut (5) through the guide rod thread (4) and one side of it abuts against the side of the adjusting shim (10) away from the fastening nut (8).

5. The improved structure for disassembling the centrifugal pump cover according to claim 4, characterized in that, The conical top plate (15) is provided corresponding to the impeller (16) to prevent damage to the impeller (16) and displacement of the top rod (12) when the top rod (12) is under force.

Images