Multi-stage centrifugal pump disassembling tool
By using a combination of support frame and inclined pusher, the impeller of a multi-stage centrifugal pump is disassembled by squeezing, which solves the structural damage and slippage problems caused by existing hammer disassembly and achieves safe and efficient impeller disassembly.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANKUANG ENERGY GRP CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-01
AI Technical Summary
The impellers of existing multistage centrifugal pumps are tightly connected to the pump shaft and are prone to rust. Existing hammering disassembly methods may cause structural deformation and damage to the centrifugal pump and impeller slippage. Furthermore, unbalanced forces can easily damage the impeller and shaft.
It adopts a combination structure of support frame, pressing mechanism and inclined pusher, and separates the impeller by extrusion to avoid hammering vibration and unbalanced force, so as to achieve balanced disassembly.
Protect the centrifugal pump structure, prevent deformation and slippage, reduce impeller and shaft damage, and achieve safe and efficient impeller disassembly.
Smart Images
Figure CN224182977U_ABST
Abstract
Description
A disassembly tool for a multistage centrifugal pump Technical Field
[0001] This utility model relates to the field of centrifugal pump disassembly technology, and more specifically, to a disassembly fixture for a multi-stage centrifugal pump. Background Technology
[0002] A multistage centrifugal pump is a type of pump used to transport liquids. It consists of multiple centrifugal pumps cascaded together. Each centrifugal pump accelerates the liquid and generates pressure through an impeller, and then sends the liquid to the next centrifugal pump. Its main structure consists of a pump body, impeller, and pump shaft. Multistage centrifugal pumps are commonly used in applications requiring high pressure, such as construction, municipal engineering, and industrial production.
[0003] During the maintenance of multistage centrifugal pumps, it may be necessary to repair or replace the impeller. However, the impeller and pump shaft are tightly fitted, and the contact area between the impeller and pump shaft may rust due to water corrosion, causing the impeller and pump shaft to be even more tightly joined together. At this time, the existing disassembly method is to use a hammering method, mainly by hitting the flange on the outside of the impeller with a hammer. However, the above-mentioned existing hammering disassembly method has the following problems: when hammering the impeller, the hammering vibration may cause deformation and damage to the centrifugal pump structure. At the same time, the hammering may cause other impellers in the downstream stage to slip and fall off. Moreover, the hammering is generally done by alternating left and right sides, resulting in an unbalanced force on the impeller, which can easily cause damage to the impeller and shaft due to the unbalanced disassembly force.
[0004] In summary, how to provide a disassembly fixture for a multi-stage centrifugal pump is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention
[0005] In view of this, the purpose of this utility model is to provide a disassembly tool for a multi-stage centrifugal pump.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A disassembly fixture for a multistage centrifugal pump includes:
[0008] A support frame, comprising a front support plate and a rear support plate, with two side support plates connected between the front support plate and the rear support plate, and two sliding rods fixedly connected between the two front support plates and the rear support plate, with sliders slidably connected to the sliding rods, and two support legs fixedly installed on the same side of the two side support plates, with mounting plates fixedly installed at the bottom of the support legs;
[0009] A pressing mechanism includes a vertical plate, which is fixedly mounted on the slider. A shaft is rotatably connected to the vertical plate. A pressing cam is fixedly connected to one side of the shaft, and a pressing handle is fixedly connected to the other side of the shaft.
[0010] The inclined pusher includes a main board with two U-shaped grooves at the bottom. The slide rod is fitted and engaged with the U-shaped grooves. A pressure plate is fixedly connected to the top of the main board, and connecting plates are fixedly connected to both sides of the lower part of the main board. An inclined push block is fixedly connected to the bottom end of the two connecting plates.
[0011] On the other hand, an arc-shaped groove is provided at the lower part of the rear support plate.
[0012] On the other hand, the lower two sides of the rear support plate are provided with first mounting holes.
[0013] On the other hand, a baffle is fixedly connected to the upper part of the rear support plate.
[0014] On the other hand, the mounting plate is provided with a second mounting hole.
[0015] On the other hand, a limit post is fixedly connected to the upper part of the vertical plate.
[0016] On the other hand, a return spring is connected between the vertical plate and the pressure handle.
[0017] On the other hand, a lifting handle is fixedly connected to the upper part of the motherboard.
[0018] This utility model provides a multi-stage centrifugal pump disassembly fixture that separates multi-stage impellers by squeezing, avoiding hammering disassembly. This prevents structural deformation or damage between equipment caused by hammering vibration, protects the centrifugal pump, and also prevents the impellers of subsequent stages from slipping off. At the same time, the impellers are disassembled by squeezing from both ends simultaneously, so that the impellers are subjected to balanced forces, reducing the damage to the impellers and shafts caused by the imbalance of disassembly forces. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0020] Figure 1 is a front view structural diagram of a specific embodiment provided by this utility model;
[0021] Figure 2 is a three-dimensional structural diagram of the support frame according to a specific embodiment of the present utility model;
[0022] Figure 3 is a three-dimensional structural diagram of the pressing mechanism in a specific embodiment of this utility model;
[0023] Figure 4 is a three-dimensional structural diagram of the inclined pusher according to a specific embodiment of the present invention.
[0024] Figure label:
[0025] 1-Support frame; 2-Front support plate; 3-Rear support plate; 4-Side support plate; 5-Slide rod; 6-Slider; 7-Support leg; 8-Mounting plate; 9-Pressing mechanism; 10-Vertical plate; 11-Shaft; 12-Pressing cam; 13-Pressure handle; 14-Angled pusher; 15-Main board; 16-U-shaped groove; 17-Pressure plate; 18-Connecting plate; 19-Angled push block; 20-Arc groove; 21-First mounting hole; 22-Baffle; 23-Second mounting hole; 24-Limiting post; 25-Return tension spring; 26-Lifting handle. Detailed Implementation
[0026] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0027] The core of this utility model is to provide a disassembly tool for a multi-stage centrifugal pump.
[0028] Please refer to Figures 1-4: A disassembly fixture for a multistage centrifugal pump, including:
[0029] Support frame 1 includes a front support plate 2 and a rear support plate 3. Two side support plates 4 are connected between the front support plate 2 and the rear support plate 3. Two sliding rods 5 are fixedly connected between the two front support plates 2 and the rear support plate 3. A slider 6 is slidably connected on the sliding rod 5. Two support legs 7 are fixedly installed on the same side of the two side support plates 4. An installation plate 8 is fixedly installed at the bottom of the support legs 7.
[0030] The pressing mechanism 9 includes a vertical plate 10, which is fixedly mounted on the slider 6. A shaft 11 is rotatably connected to the vertical plate 10. A pressing cam 12 is fixedly connected to one side of the shaft 11, and a pressure handle 13 is fixedly connected to the other side of the shaft 11.
[0031] The inclined pusher 14 includes a main board 15. The lower part of the main board 15 has two U-shaped grooves 16. The slide rod 5 is adapted to and snapped into the U-shaped grooves 16. The top of the main board 15 is fixedly connected to a pressure plate 17. The lower two sides of the main board 15 are fixedly connected to connecting plates 18. The bottom ends of the two connecting plates 18 are fixedly connected to inclined push blocks 19.
[0032] In this structure, the front support plate 2 on the support frame 1 is connected to the through-bar connecting lug on the inlet end of the multi-stage centrifugal pump. At the same time, the mounting plate 8 on the support leg 7 is fixed to the original fixed position of the high-pressure pump head, thereby fixing the entire support frame 1. Then, the operator inserts the inclined push block 19 of the inclined pusher 14 into the flanges on the outer wall of the multi-stage impeller. Then, the operator slides the slider 6 on the slide rod 5, thereby moving the downward pressing cam 12 on the downward pressing mechanism 9 above the pressure plate 17. Then, the operator presses down the pressure handle 13, thereby driving the downward pressing cam 12 on the shaft 11 to rotate, so that the protrusion of the downward pressing cam 12 presses down on the pressure plate 17. At this time, the inclined push block 1... The inclined surface of 9 presses against the outer side of the impeller, while the back of the inclined push block 19 presses against the flange of the adjacent impeller, thus detaching this stage of impeller and achieving impeller disassembly. The downward pressing uses the lever principle, which is very labor-saving. Then, the operation is repeated in sequence to disassemble each stage of impeller. The entire disassembly fixture uses a pressing method to separate multiple stages of impellers, avoiding hammering disassembly, thereby avoiding structural deformation or damage between equipment caused by hammering vibration, protecting the centrifugal pump, and preventing the impeller of the downstream stage from slipping. At the same time, the impeller is disassembled by pressing from both ends simultaneously, so that the impeller is subjected to balanced force, reducing the damage to the impeller and shaft caused by the imbalance of disassembly force.
[0033] Please refer to Figure 2: The lower part of the rear support plate 3 is provided with an arc-shaped groove 20. This structure uses the arc-shaped groove 20 to adapt to the arc-shaped housing of the liquid inlet end of the multi-stage centrifugal pump.
[0034] Please refer to Figure 2: The lower two sides of the rear support plate 3 are provided with first mounting holes 21. This structure utilizes the first mounting holes 21 to conveniently fix the rear support plate 3 to the through rod connecting lug at the liquid inlet end of the centrifugal pump using bolts.
[0035] Please refer to Figures 1-2: A baffle 22 is fixedly connected to the upper part of the rear support plate 3. In this structure, when the last stage impeller is pressed, the baffle 22 will press against the main plate 15, thereby preventing the inclined push block 19 from moving backward and ensuring the disassembly of the last stage impeller.
[0036] Please refer to Figure 2: The mounting plate 8 has a second mounting hole 23. This structure utilizes the second mounting hole 23 to facilitate the mounting plate 8 to be fixed to the original position of the high-pressure pump head by bolts.
[0037] Please refer to Figure 3: The upper part of the vertical plate 10 is fixedly connected to the limit post 24. This structure uses the limit post 24 to limit the maximum backward rotation position of the pressure handle 13.
[0038] Please refer to Figure 3: A return spring 25 is connected between the vertical plate 10 and the pressure handle 13. This structure uses the tension of the return spring 25 to prevent the pressure handle 13 from turning downwards, and at the same time assists the pressure handle 13 in returning to its original position after being pressed down, thus facilitating the next pressing operation.
[0039] Please refer to Figure 4: The upper part of the main board 15 is fixedly connected to a lifting handle 26. The secondary structure uses the lifting handle 26 to facilitate personnel to lift the inclined pusher 14.
[0040] In summary: Connect the front support plate 2 on the support frame 1 to the through-bar connecting lug on the inlet of the multi-stage centrifugal pump, and fix the mounting plate 8 on the support leg 7 to the original fixed position of the high-pressure pump head, thereby fixing the entire support frame 1. Then, the operator inserts the inclined push block 19 of the inclined pusher 14 into the flanges on the outer wall of the multi-stage impeller. Then, the operator slides the slider 6 on the slide rod 5, thereby moving the pressing cam 12 on the pressing mechanism 9 above the pressure plate 17. Then, the operator presses down the pressure handle 13, thereby driving the pressing cam 12 on the shaft 11 to rotate, so that the protrusion of the pressing cam 12 presses down on the pressure plate 17. At this time, the inclined surface of the inclined push block 19 presses the impeller outward, and at the same time, the back of the inclined push block 19 presses the flange of the adjacent impeller, thereby detaching this stage impeller and realizing impeller disassembly. Then, the operation is repeated in sequence to disassemble each stage of impeller.
[0041] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0042] The above provides a detailed description of the disassembly fixture for a multi-stage centrifugal pump provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core idea of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of this utility model.
Claims
1. A disassembly fixture for a multi-stage centrifugal pump, characterized in that, include: A support frame (1) includes a front support plate (2) and a rear support plate (3). Two side support plates (4) are connected between the front support plate (2) and the rear support plate (3). Two sliding rods (5) are fixedly connected between the two front support plates (2) and the rear support plate (3). A slider (6) is slidably connected on the sliding rod (5). Two support legs (7) are fixedly installed on the same side of the two side support plates (4). An mounting plate (8) is fixedly installed at the bottom of the support legs (7). A pressing mechanism (9) includes a vertical plate (10). The vertical plate (10) is fixedly installed on the slider (6). A shaft (11) is rotatably connected to the plate (10). A downward pressing cam (12) is fixedly connected to one side of the shaft (11), and a pressure handle (13) is fixedly connected to the other side of the shaft (11). An inclined pusher (14) is included, which includes a main board (15). Two U-shaped grooves (16) are opened at the lower part of the main board (15). The slide rod (5) is adapted to and snapped into the U-shaped grooves (16). A pressure plate (17) is fixedly connected to the top of the main board (15). Connecting plates (18) are fixedly connected to both sides of the lower part of the main board (15). An inclined pusher block (19) is fixedly connected to the bottom end of the two connecting plates (18).
2. The multi-stage centrifugal pump disassembly fixture according to claim 1, characterized in that, The lower part of the rear support plate (3) is provided with an arc-shaped groove (20).
3. The multi-stage centrifugal pump disassembly fixture according to claim 1, characterized in that, The lower two sides of the rear support plate (3) are provided with first mounting holes (21).
4. The multi-stage centrifugal pump disassembly fixture according to claim 1, characterized in that, A baffle (22) is fixedly connected to the upper part of the rear support plate (3).
5. The multi-stage centrifugal pump disassembly fixture according to claim 1, characterized in that, The mounting plate (8) has a second mounting hole (23).
6. The multi-stage centrifugal pump disassembly fixture according to claim 1, characterized in that, The upper part of the vertical plate (10) is fixedly connected to a limiting post (24).
7. The multi-stage centrifugal pump disassembly fixture according to claim 1, characterized in that: A return spring (25) is connected between the vertical plate (10) and the pressure handle (13).
8. The multi-stage centrifugal pump disassembly fixture according to claim 1, characterized in that: A handle (26) is fixedly connected to the upper part of the motherboard (15).