Fixing device for preventing pump shaft from rotating or moving

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By designing a fixing device on the centrifugal pump to fix the pump shaft to prevent rotation and movement, the problem of damage to the seal at the other end of the pump shaft during maintenance is solved, achieving more stable production and reducing environmental pollution.

CN222391636UActive Publication Date: 2025-01-24ANHUI JINMEI ZHONGNENG CHEM IND

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Patent Information

Application Number: CN202421010528.2
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-05-11
Publication Date: 2025-01-24
Estimated Expiration: 2034-05-11

AI Technical Summary

Technical Problem

When the mechanical seal of the centrifugal pump leaks, the rotation or twitching of the pump shaft causes damage to the mechanical seal at the other end during the maintenance process, causing production fluctuations, increasing maintenance costs and environmental pollution.

Method used

A fixing device is designed. By opening threaded holes on the pump body and pump shaft, the pressure plate is fixed on the pump shaft through fixing screws and nuts, and the pressure plate is connected to the pump body through the first fixing screw and nut to fix the pump shaft. to prevent it from turning or moving.

Benefits of technology

Effectively prevent the rotation and challenge of the pump shaft during the maintenance process, avoid damage to mechanical sealing at the other end, reduce maintenance costs and environmental pollution, and improve production stability.

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Abstract

The utility model provides a fixing device for preventing a pump shaft from rotating or moving. According to the fixing device for preventing the pump shaft from rotating or moving, the pump shaft is arranged on one side of a pump body, and two first threaded holes are formed in the position, close to the outer surface, of one end of the pump body. According to the fixing device for preventing the pump shaft from rotating or moving, when a sealing structure of the pump body is repaired, the pump shaft can be fixed through the pressing plate and the two first fixing screws, rotation and moving in the overhaul process are avoided, and the problem that when a mechanical seal at one end of a centrifugal pump is damaged and needs to be detached and replaced, the mechanical seal is damaged is solved. The mechanical seals at the two ends of the centrifugal pump are connected with the impeller through the pump shaft, so that the problem that the intact seal at the other end is damaged is solved, the mechanical seal at the other end is prevented from being damaged when the mechanical seal at one end of the centrifugal pump is replaced, unnecessary loss is avoided, manpower is greatly reduced, and the production efficiency is improved. And environmental pollution is also avoided.

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Description

Technical Field

[0001] The utility model relates to the technical field of pump body repair and fixing, in particular to a fixing device for preventing a pump shaft from rotating or moving. Background Art

[0002] Centrifugal pumps are commonly used operating equipment in synthetic ammonia systems. As the operating time goes by, leakage of the pump's mechanical seal often occurs. When the pump's mechanical seal leaks, if it is not repaired in time, it will directly affect the stable production of the synthetic ammonia system. At the same time, its leakage will not only cause material loss, but also cause certain pollution to the environment.

[0003] When a centrifugal pump has a mechanical seal leak, usually, the mechanical seal at one end of the pump leaks, while the mechanical seal at the other end remains intact. Therefore, during maintenance, only the leaking mechanical seal is replaced, not all the mechanical seals at both ends. However, during the process of disassembling the mechanical seal at one end, the mechanical seal at the other end is often damaged due to the back and forth rotation or movement of the pump shaft. As a result, when the pump is started after maintenance, the mechanical seal at the other end of the pump leaks again, and the pump is forced to stop and repair the mechanical seal at the other end.

[0004] During the repeated pump shutdown and maintenance process, the shaft will move with the rotation, which will not only cause production fluctuations, but also greatly increase the workload of maintenance personnel, while also bringing about an increase in maintenance costs and environmental pollution.

[0005] Therefore, it is necessary to provide a fixing device to prevent the pump shaft from rotating or moving to solve the above technical problems. Utility Model Content

[0006] The utility model provides a fixing device to prevent the pump shaft from rotating or moving, which solves the problem that the shaft of the centrifugal pump rotates and moves when the centrifugal pump sealing structure needs to be repaired. Repeated pump shutdown for repair will not only cause production fluctuations, but also increase the workload of maintenance personnel, increase costs and cause environmental pollution.

[0007] In order to solve the above technical problems, the utility model provides a fixing device for preventing the pump shaft from rotating or moving, comprising: a pump body;

[0008] A pump shaft, the pump shaft is arranged on one side of the pump body, one end of the pump body is provided with two first threaded holes near the outer surface, one end of the pump shaft is provided with a second threaded hole, one end of the pump shaft is provided with a pressure plate installed through a second fixing screw, and the outer surface of the second fixing screw is threadedly connected with a second nut;

[0009] Two first fixing screws, one end of each of the two first fixing screws being threadedly connected to the inside of the two first threaded holes, and the outer surfaces of the first fixing screws being threadedly connected to a plurality of first nuts;

[0010] A hole for the second fixing screw to pass through is opened in the middle of one side of the pressure plate. The second fixing screw is threadedly connected to the second threaded hole. The two first fixing screws pass through the pressure plate. For details, please refer to Figure 1 The positions of the first nuts on the outer surface of the first fixing screw can refer to Figure 1 .

[0011] Preferably, two gaskets are provided on the outer surfaces of the two first fixing screws, and holes are provided on one side of the pressing plate near the front and back sides for the two first fixing screws to pass through;

[0012] The gaskets are located on both sides of the pressure plate. For details, please refer to Figure 1 , the gasket cooperates with the first nut to connect the first fixing screw and the pressure plate.

[0013] Preferably, a mounting block is installed on one side of the pressing plate by bolts, a support rod is fixedly connected to one side of the mounting block, and a connecting ring is installed at the bottom of the other side of the pressing plate by bolts;

[0014] The bolts penetrate the pressure plate and the connecting ring to be threadedly connected, and the connecting ring can be fixed below the pump shaft in cooperation with the support rod located at the bottom of the connecting ring.

[0015] Preferably, one end of each of the two first fixing screws is provided with a socket, and an insert block is provided inside the socket;

[0016] The plug-in block is inserted into the inside of the socket and is square in shape.

[0017] Preferably, a rotating disk is fixedly connected to one side of the insert block, and mounting grooves are provided on the top and bottom of the insert block;

[0018] The outer surface of the rotating disk is provided with anti-skid grooves, and the rotating disk is circular.

[0019] Preferably, the bottom and top of the inner walls of the two installation grooves are fixedly connected with fixing plates, and the other ends of the fixing plates are fixedly connected with support springs;

[0020] The position of the fixing plate in the mounting slot can be referenced Figure 5 , the support spring provides the supporting force.

[0021] Preferably, the other end of each group of support springs is fixedly connected to a movable block, and the other side of the movable block is fixedly connected to a limit strip;

[0022] The movable block moves inside the installation slot, and the shape of the limit strip is referenced Figure 5 The limit strip can increase stability after the plug is inserted into the socket.

[0023] Compared with the related art, the fixing device for preventing the pump shaft from rotating or moving provided by the utility model has the following beneficial effects:

[0024] The utility model provides a fixing device for preventing a pump shaft from rotating or swaying. In order to prevent the pump shaft from rotating when the pump body is inspecting the sealing structure, a first threaded hole and a second threaded hole are respectively opened on the pump body and the pump shaft, and then a pressure plate is fixed to one end of the pump shaft through a second fixing screw, and is fixed by a second nut, and two first fixing screws are passed through two holes opened on the pressure plate to be threadedly connected with the first threaded holes, and the two first fixing screws and the pressure plate are connected together by the first nut, thereby completing the fixing of the pump shaft to prevent the rotation and swaying. Through the structure, when the sealing structure of the pump body is inspected, the pressure plate and the two first fixing screws can be used to fix the pump shaft to prevent rotation and swaying during inspection, and the problem that when the mechanical seal at one end of the centrifugal pump is damaged and needs to be disassembled and replaced is solved because the mechanical seals at both ends are connected to the impeller through a pump shaft, thereby causing the intact seal at the other end to be damaged, thereby ensuring that when the mechanical seal at one end of the centrifugal pump is replaced, the mechanical seal at the other end will not be damaged, thereby avoiding unnecessary losses, greatly reducing manpower, and avoiding environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a first embodiment of a fixing device for preventing a pump shaft from rotating or moving provided by the utility model;

[0026] Figure 2 A structural schematic diagram of a first threaded hole is provided for the utility model;

[0027] Figure 3 A structural schematic diagram of a support rod is provided for the utility model;

[0028] Figure 4 A schematic structural diagram of a second embodiment of a fixing device for preventing a pump shaft from rotating or moving provided by the utility model;

[0029] Figure 5 The utility model provides a structural schematic diagram of a support spring.

[0030] Numbers in the figure: 1. Pump body, 2. Pump shaft, 3. Pressure plate, 4. First nut, 5. First fixing screw, 6. Second nut, 7. Second fixing screw, 8. Gasket, 9. First threaded hole, 10. Second threaded hole, 11. Bolt, 12. Mounting block, 13. Support rod, 14. Connecting ring, 15. Socket, 16. Insert block, 17. Rotating disk, 18. Limiting strip, 19. Fixed plate, 20. Support spring, 21. Movable block, 22. Mounting groove. DETAILED DESCRIPTION

[0031] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0032] Please refer to Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 A schematic structural diagram of a first embodiment of a fixing device for preventing a pump shaft from rotating or moving provided by the utility model; Figure 2 A structural schematic diagram of a first threaded hole is provided for the utility model; Figure 3 The utility model provides a structural schematic diagram of the support rod. The fixing device for preventing the pump shaft from rotating or moving comprises: a pump body 1;

[0033] A pump shaft 2, the pump shaft 2 is arranged on one side of the pump body 1, one end of the pump body 1 is provided with two first threaded holes 9 near the outer surface, one end of the pump shaft 2 is provided with a second threaded hole 10, one end of the pump shaft 2 is provided with a pressing plate 3 through a second fixing screw 7, and the outer surface of the second fixing screw 7 is threadedly connected with a second nut 6;

[0034] Two first fixing screws 5, one end of each of the two first fixing screws 5 is threadedly connected to the inside of the two first threaded holes 9, and the outer surfaces of the first fixing screws 5 are threadedly connected to a plurality of first nuts 4;

[0035] A hole is provided at the middle of one side of the pressing plate 3 to allow the second fixing screw 7 to pass through. The second fixing screw 7 is threadedly connected to the second threaded hole 10. The two first fixing screws 5 pass through the pressing plate 3. For details, please refer to Figure 1 The positions of the plurality of first nuts 4 on the outer surface of the first fixing screw 5 can refer to Figure 1 .

[0036] Two gaskets 8 are provided on the outer surfaces of the two first fixing screws 5, and holes are provided on one side of the pressing plate 3 near the front and back sides for the two first fixing screws 5 to pass through;

[0037] The gaskets 8 are respectively located on both sides of the pressing plate 3. For details, please refer to Figure 1 The washer 8 cooperates with the first nut 4 to connect the first fixing screw 5 and the pressing plate 3.

[0038] A mounting block 12 is mounted on one side of the pressing plate 3 through a bolt 11, a support rod 13 is fixedly connected to one side of the mounting block 12, and a connecting ring 14 is mounted on the other side of the pressing plate 3 at the bottom through the bolt 11;

[0039] The bolts 11 penetrate through the pressure plate 3 and the connecting ring 14 to be threadedly connected, and the connecting ring 14 can be fixed below the pump shaft 2 by cooperating with the support rod 13 located at the bottom of the connecting ring 14 .

[0040] The working principle of the fixing device for preventing the pump shaft from rotating or moving provided by the utility model is as follows:

[0041] First, the first threaded hole 9 and the second threaded hole 10 are respectively opened on the pump body 1 and the pump shaft 2, and then the pressure plate 3 is fixed to one end of the pump shaft 2 by the second fixing screw 7, and it is fastened by the second nut 6, and the two first fixing screws 5 are passed through the two holes opened on the pressure plate 3 to be threadedly connected with the first threaded hole 9, and the two first fixing screws 5 and the pressure plate 3 are connected together by the first nut 4, thereby completing the fixation of the pump shaft 2 to prevent it from rotating and moving.

[0042] Compared with the related art, the fixing device for preventing the pump shaft from rotating or moving provided by the utility model has the following beneficial effects:

[0043] In order to prevent the pump shaft 2 from rotating when the pump body 1 is inspecting the sealing structure, the first threaded hole 9 and the second threaded hole 10 are respectively opened on the pump body 1 and the pump shaft 2, and then the pressure plate 3 is fixed to one end of the pump shaft 2 by the second fixing screw 7, and it is tightened by the second nut 6, and the two first fixing screws 5 are passed through the two holes opened on the pressure plate 3 to be threadedly connected with the first threaded hole 9, and the two first fixing screws 5 and the pressure plate 3 are connected together by the first nut 4, so as to complete the fixing of the pump shaft 2 to prevent it from rotating and moving. The structure can fix the pump shaft 2 by using the pressure plate 3 and the two first fixing screws 5 when inspecting the sealing structure of the pump body 1 to prevent rotation and movement during inspection, thereby solving the problem that when the mechanical seal at one end of the centrifugal pump is damaged and needs to be disassembled and replaced, because the mechanical seals at both ends are connected to the impeller through a pump shaft 2, thereby causing the intact seal at the other end to be damaged. This ensures that when the mechanical seal at one end of the centrifugal pump is replaced, the mechanical seal at the other end will not be damaged, avoiding unnecessary losses, greatly reducing manpower, and avoiding environmental pollution.

[0044] Second embodiment

[0045] Please refer to Figure 4-Figure 5 , Figure 4A schematic structural diagram of a second embodiment of a fixing device for preventing a pump shaft from rotating or moving provided by the utility model; Figure 5 The utility model provides a structural schematic diagram of a support spring. Based on the fixing device for preventing the pump shaft from rotating or swaying provided in the first embodiment of the present application, the second embodiment of the present application proposes another fixing device for preventing the pump shaft from rotating or swaying. The second embodiment is only a preferred mode of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0046] Specifically, the fixing device for preventing the pump shaft from rotating or moving provided in the second embodiment of the present application is different in that one end of each of the two first fixing screws 5 is provided with a socket 15, and an insert block 16 is provided inside the socket 15;

[0047] The plug block 16 is inserted into the socket 15 and is square in shape.

[0048] A rotating disk 17 is fixedly connected to one side of the insert block 16, and mounting grooves 22 are provided at the top and bottom of the insert block 16;

[0049] The outer surface of the rotating disk 17 is provided with anti-skid grooves, and the rotating disk 17 is circular.

[0050] The bottom and top of the inner walls of the two mounting grooves 22 are fixedly connected with fixing plates 19, and the other ends of the fixing plates 19 are fixedly connected with support springs 20;

[0051] The position of the fixing plate 19 in the mounting groove 22 can be referred to Figure 5 , the support spring 20 provides supporting force.

[0052] The other end of each group of support springs 20 is fixedly connected to a movable block 21, and the other side of the movable block 21 is fixedly connected to a limit bar 18;

[0053] The movable block 21 moves inside the mounting groove 22. The shape of the limit strip 18 is as shown in FIG. Figure 5 The limiting strip 18 can increase stability after the insert block 16 is inserted into the socket 15 .

[0054] Compared with the related art, the fixing device for preventing the pump shaft from rotating or moving provided by the utility model has the following beneficial effects:

[0055] In order to facilitate the disassembly and assembly of the two first fixing screws 5, a socket 15 is first opened at one end of the first fixing screw 5. When the first fixing screw 5 needs to be disassembled and assembled, it is only necessary to insert the plug block 16 at one end of the rotating disk 17 into the inside of the socket 15, and the two surfaces of the plug block 16 and the socket 15 in contact are both installed with movable blocks 21 through supporting springs 20, and limiting strips 18 are respectively installed on the movable blocks 21. After the plug block 16 is inserted into the inside of the socket 15, the limiting strip 18 is pushed by the supporting spring 20 so that it is tightly fitted with the inside of the socket 15 to increase the friction force, thereby preventing the plug block 16 from detaching from the socket 15 during the process of the rotating disk 17 driving the first fixing screw 5 to rotate. After the plug block 16 is inserted into the inside of the socket 15, the first fixing screw 5 can be driven to rotate by the rotating disk 17, thereby easily realizing the disassembly and assembly of the first fixing screw 5, reducing the difficulty of disassembly and improving the disassembly efficiency.

[0056] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A fixing device for preventing a pump shaft from rotating or moving, characterized in that: include: Pump body; A pump shaft, the pump shaft is arranged on one side of the pump body, one end of the pump body is provided with two first threaded holes near the outer surface, one end of the pump shaft is provided with a second threaded hole, one end of the pump shaft is provided with a pressure plate installed through a second fixing screw, and the outer surface of the second fixing screw is threadedly connected with a second nut; Two first fixing screws, one end of the two first fixing screws are respectively threadedly connected to the inside of the two first threaded holes, and the outer surfaces of the first fixing screws are threadedly connected to a plurality of first nuts.

2. The fixing device for preventing the pump shaft from rotating or moving according to claim 1, characterized in that: Two gaskets are arranged on the outer surfaces of the two first fixing screws, and holes for allowing the two first fixing screws to pass through are opened at positions close to the front and back sides of one side of the pressure plate.

3. The fixing device for preventing the pump shaft from rotating or moving according to claim 1, characterized in that: A mounting block is installed on one side of the pressure plate through bolts, a support rod is fixedly connected to one side of the mounting block, and a connecting ring is installed at the bottom of the other side of the pressure plate through bolts.

4. The fixing device for preventing the pump shaft from rotating or moving according to claim 1, characterized in that: One end of the two first fixing screws is provided with a socket, and an insert block is arranged inside the socket.

5. The fixing device for preventing the pump shaft from rotating or moving according to claim 4, characterized in that: A rotating disk is fixedly connected to one side of the insert block, and mounting grooves are provided on the top and bottom of the insert block.

6. The fixing device for preventing the pump shaft from rotating or moving according to claim 5, characterized in that: The bottom and top of the inner walls of the two installation grooves are fixedly connected with fixing plates, and the other ends of the fixing plates are fixedly connected with supporting springs.

7. The fixing device for preventing the pump shaft from rotating or moving according to claim 6, characterized in that: The other end of each group of support springs is fixedly connected to a movable block, and the other side of the movable block is fixedly connected to a limiting strip.