Large horizontal multi-stage centrifugal pump disassembling and assembling device

Abstract

The utility model discloses a large horizontal multi-stage centrifugal pump disassembling and assembling device which is provided with a maintenance base and a fixed supporting frame, a lifting supporting frame is further arranged in the maintenance base, an assembling height adjusting mechanism in the lifting supporting frame is provided with a supporting block and an adjusting lead screw, and the supporting block is fixedly connected with the adjusting lead screw. The water inlet section placed in the maintenance base is coaxial with a pump shaft of the centrifugal pump and is sleeved outside the pump shaft of the centrifugal pump, and to-be-mounted centrifugal pump middle section assemblies are sequentially sleeved behind the water inlet section in a penetrating manner; a to-be-mounted centrifugal pump middle section assembly is placed on a supporting block of the lifting supporting frame and can move up and down along with the adjusting lead screw; tensioning lead screws are installed on the two sides of the fixed supporting frame, a force application shifting plate is fixed to the rear end of each tensioning lead screw, and the force application shifting plates are in lap joint with hanging lugs of a final-stage centrifugal pump middle section assembly to be installed. According to the device, the accuracy of perpendicularity between the centrifugal pump middle section assembly and the centrifugal pump shaft is ensured when the multi-stage centrifugal pump is horizontally disassembled and assembled, the disassembling and assembling efficiency is effectively improved, and the maintenance quality is ensured.

Description

Technical Field

[0001] The utility model relates to disassembly and assembly equipment for a multi-stage centrifugal pump, in particular to a disassembly and assembly device for a large-scale horizontal multi-stage centrifugal pump. Background Art

[0002] In the field of crude oil extraction in the petroleum industry, large centrifugal pumps are important production equipment, especially on offshore oil production platforms, which require a large number of multi-stage horizontal centrifugal water injection pumps, such as multi-stage horizontal centrifugal pumps with large displacements of 350 cubic meters, 250 cubic meters and 120 cubic meters per hour.

[0003] During the maintenance of large-displacement multi-stage horizontal centrifugal pumps, the main components that need to be disassembled are: the centrifugal pump shaft and the centrifugal pump middle section assembly consisting of multiple components including centrifugal pump guide vanes, impellers, and middle sections. The components of the centrifugal pump middle section assembly are heavy and numerous. Some large multi-stage horizontal centrifugal water injection pumps have more than ten stages of centrifugal pump middle section assemblies. When transporting, adjusting, and maintaining the calibration status of the centrifugal pump middle section assembly, multiple people need to coordinate the work, which is not only time-consuming and labor-intensive, but also poses a greater risk of collision, injury, and extrusion to maintenance personnel.

[0004] After maintenance, when installing a large-displacement horizontal multistage centrifugal pump, the centrifugal pump shaft needs to be kept vertical to the center end face of each centrifugal pump middle section assembly. When installing a large-displacement multistage horizontal centrifugal pump, the conventional installation method is generally to use a tripod and a hand chain hoist in conjunction with manual disassembly and assembly: first, hoist the centrifugal pump middle section assembly into the tripod with a hand chain hoist, and push the tripod to move the components; after moving to the installation position, add a shim block to raise the centrifugal pump middle section assembly, so that the centrifugal pump middle section assembly and the horizontal centrifugal pump shaft remain vertical, and the center hole of the centrifugal pump middle section assembly and the centrifugal pump shaft are in a suitable relative position.

[0005] This temporary shim block cannot completely guarantee the stability of the centrifugal pump components, and during adjustment, it is necessary to repeatedly pull out shims of different thicknesses, which is labor-intensive, inefficient, slow, and inconvenient to operate, and the maintenance work is labor-intensive.

[0006] After searching, there are currently the following disassembly and assembly devices related to multi-stage centrifugal pumps: the disassembly and assembly device for the guide vanes and impeller assembly of a multi-stage centrifugal pump disclosed in application number 202220387256.2, and the above utility model includes a center seat, a clamping mechanism and a cleaning mechanism. The above utility model can insert the guide head into the inner side of the impeller assembly by setting a cleaning mechanism, etc., and clamp the impeller assembly by using the clamping mechanism, control the motor to work, drive the drive rod to rotate, and then drive the cleaning brush column to rotate. The user can push the movable frame in the direction close to the impeller assembly with the cooperation of the deformation of the first spring, and then insert the cleaning brush column into the inner side of the impeller assembly to reliably clean the inner side of the impeller assembly to ensure the cleanliness of the installation position when installing the impeller assembly. The above device focuses on the reliable cleaning of the impeller assembly.

[0007] However, the above device does not solve the problem of handling and accurately adjusting heavy weight components when disassembling and assembling a large-displacement multi-stage horizontal centrifugal pump.

[0008] Application No. 202121310469.7 discloses a universal lifting device for disassembling and assembling a multi-stage centrifugal pump, the device comprising a nut, a ring plate, a lifting ring, a lifting ring seat and a positioning ball. The utility model focuses on solving the purpose of effectively achieving the overall stable lifting of the multi-stage centrifugal pump.

[0009] However, the above utility model does not consider solving the problem of handling and accurately adjusting heavy weight components when disassembling and assembling a large-displacement multi-stage horizontal centrifugal pump.

[0010] There is still a need to improve the maintenance equipment for large horizontal multistage centrifugal pumps. Summary of the invention

[0011] The purpose of the utility model is to provide a large-scale horizontal multistage centrifugal pump disassembly and assembly device to solve the problems currently encountered in the maintenance of large-scale horizontal multistage centrifugal pumps. It is convenient to disassemble, install and calibrate key large components in large-scale horizontal multistage centrifugal pumps, improve maintenance efficiency and reduce the labor intensity of maintenance personnel.

[0012] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a large-scale horizontal multi-stage centrifugal pump disassembly and assembly device, which is provided with a maintenance base and a fixed support frame, wherein the fixed support frame is provided with a pump shaft insertion hole and can be loaded with the pump shaft of the centrifugal pump, wherein: a lifting support frame is also provided in the maintenance base, and an assembly height adjustment mechanism in the lifting support frame is provided with a support block and an adjusting screw rod, and the support block is fixedly connected to the adjusting screw rod; the water inlet section placed in the maintenance base is coaxial with the pump shaft of the centrifugal pump and is sleeved on the outside thereof, and the middle section assembly of the centrifugal pump to be installed is sleeved in turn behind the water inlet section; the middle section assembly of the centrifugal pump to be installed is placed on the support block of the lifting support frame and can move up and down with the adjusting screw rod; tensioning screw rods with a force-applying plate fixed on the rear end are installed on both sides of the fixed support frame, and the force-applying plate is overlapped with the hanging ears of the middle section assembly of the last-stage centrifugal pump to be installed.

[0013] Preferably, movable tracks are provided on both sides of the maintenance base, and a movable support frame can be placed in the movable track. The movable support frame is also provided with an assembly height adjustment mechanism. The middle section assembly of the final stage centrifugal pump can be placed on the support block in the movable support frame and can move up and down with the adjustment screw.

[0014] Preferably, an adaptor maintenance base is further provided on the maintenance base between the two movable rails, and the water inlet section, the lifting support frame and the movable support frame can all be fixed on the adaptor maintenance base.

[0015] Preferably, the adapter repair base is an L-shaped frame and is provided with an adapter foot at the front end, the height of the adapter foot is equal to the difference between the center height of the water inlet section in the centrifugal pump to be installed and the center height of the pump shaft of the centrifugal pump; the structure and shape of the adapter foot are consistent with the structure and shape of the foot bracket of the water inlet section, and a bolt hole that can be connected to the foot bracket of the water inlet section is provided on the adapter foot to fix the water inlet section and the adapter foot together.

[0016] Preferably, the assembly height adjustment mechanism in the lifting support frame is further provided with a lifting support seat, the lifting support seat is provided with two threaded holes, and the support block is fixedly connected to two adjustment screw rods installed in the threaded holes in the lifting support seat.

[0017] Preferably, a component placement groove is provided at the upper end of the support block, and the component placement groove is an arc-shaped groove.

[0018] Preferably, two bearings are welded at the lower ends of the two support blocks corresponding to the two adjusting screws, and screw thread sleeves are welded at the upper end or the lower end or both ends of the two threaded holes in the lifting support seat, and the adjusting screw can be screwed out of the screw thread sleeve and connected to the bearing.

[0019] Preferably, the movable support frame is also provided with support legs and a cross plate, the assembly height adjustment mechanism installed in the movable support frame is fixed at the middle part of the cross plate, the support block is fixedly connected to the adjustment screw installed in the two threaded holes in the cross plate; the support legs are fixed on both sides of the two ends of the cross plate, and the roller is installed at the lower end of each support leg.

[0020] Preferably, a screw threaded sleeve is welded at the upper end or the lower end or both ends of the two threaded holes in the horizontal plate, and the adjusting screw can be screwed out from the screw threaded sleeve and connected to the bearing; the two movable rails are fixed on both sides of the maintenance base behind the fixed support frame, and the track grooves arranged in the movable rails cooperate with the wheel end faces of the rollers in the movable support frame.

[0021] Preferably, the two force-applying plates are perpendicular to the tensioning screw and welded to the rear end of the tensioning screw facing each other, and the width and length of the force-applying plates are greater than the width and thickness of the hanging ears.

[0022] The beneficial effect of the utility model is that the device is provided with a lifting support frame and a movable support frame, and the centrifugal pump middle section assembly placed on the support block in the lifting support frame and the movable support frame can move up and down and adjust with the adjusting screw rod, so that it is at the same height as the water inlet section. It ensures that each level of the centrifugal pump middle section assembly is in a vertical state with the horizontal centrifugal pump shaft, and the center hole of the centrifugal pump middle section assembly is in a suitable relative position with the centrifugal pump shaft, which greatly facilitates the calibration and installation of the centrifugal pump middle section assembly and effectively improves the maintenance work efficiency.

[0023] In order to further reduce the labor intensity of maintenance personnel and avoid collision and damage of key components of the centrifugal pump, a movable support frame is specially arranged in the utility model, which facilitates the transfer and sleeve of each stage of the centrifugal pump middle section assembly on the outside of the centrifugal pump shaft.

[0024] The device ensures the vertical accuracy between the middle section assembly of the centrifugal pump and the pump shaft of the centrifugal pump when the multi-stage centrifugal pump is disassembled and assembled horizontally, effectively improving the disassembly and assembly efficiency and ensuring the maintenance quality.

[0025] The operation of using the device to repair large multi-stage horizontal centrifugal pumps is very simple and convenient, with strong flexibility and good application value and use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the lifting support frame in the utility model;

[0029] Figure 3 It is a structural schematic diagram of the movable support frame in the utility model.

[0030] In the figure: maintenance base 1, fixed support frame 2, movable track 3, movable support frame 4, roller 5, support leg 6, first-stage centrifugal pump middle section assembly 7, second-stage centrifugal pump middle section assembly 8, third-stage centrifugal pump middle section assembly 9, final-stage centrifugal pump middle section assembly 16, centrifugal pump shaft 10, centrifugal pump shaft fixing nut 11, tensioning screw 12;

[0031] Lifting support frame 13: component placement slot 1301, adjusting screw rod 1302, screw rod thread sleeve 1303, rotating handle 1304, support block 1305, bearing 1306;

[0032] Force-applying plate 14, water inlet section 15, hanging lug 17, and final centrifugal pump middle section assembly 16;

[0033] Adaptive maintenance base 18, adaptive foot 18-1. DETAILED DESCRIPTION

[0034] The accompanying drawings are for reference and illustration only and are not intended to limit the scope of protection of the present utility model. The technical solutions in the embodiments of the present utility model will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0035] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0036] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0037] See also Figure 1-Figure 3 A large-scale horizontal multi-stage centrifugal pump disassembly and assembly device is provided with a maintenance base 1 and a fixed support frame 2, wherein the fixed support frame 2 is provided with a pump shaft insertion hole and can be loaded with a centrifugal pump shaft 10, wherein: a lifting support frame 13 is also provided in the maintenance base 1, and an assembly height adjustment mechanism in the lifting support frame 13 is provided with a support block 1305 and an adjusting screw rod 1302, and the support block 1305 is fixedly connected to the adjusting screw rod 1302; a water inlet section 15 placed in the maintenance base 1 is coaxial with the centrifugal pump shaft 10 and is sleeved on the outside thereof, and the middle section assembly of the centrifugal pump to be installed is sequentially sleeved behind the water inlet section 15; the middle section assembly of the centrifugal pump to be installed is placed on the support block 1305 of the lifting support frame 13 and can move up and down with the adjusting screw rod 1302; tensioning screw rods 12 with a force-applying plate 14 fixed at the rear end are installed on both sides of the fixed support frame 2, and the force-applying plate 14 is overlapped with the hanging ears 17 of the middle section assembly 16 of the final-stage centrifugal pump to be installed. The centrifugal pump middle section assembly at the rear side of the water inlet section 15 needs to be adjusted and installed step by step. The final centrifugal pump middle section assembly 16 refers to the centrifugal pump middle section assembly to be adjusted and installed behind the water inlet section 15. After tightening the impeller assembly in the final centrifugal pump middle section assembly 16 to be installed on the outside of the centrifugal pump shaft 10 and located at the rear side by hand tools or electric tools and the tensioning screw 12, the centrifugal pump middle section assemblies are spot welded with iron strips to fix the centrifugal pump middle section assemblies at each stage on the outside of the centrifugal pump shaft 10. All the centrifugal pump middle section assemblies to be installed are adjusted and fixed on the outside of the centrifugal pump shaft 10 in turn.

[0038] The middle section of a multistage centrifugal pump may need to be set up and can be set up with ten or more stages according to production requirements. Figure 1 Only five centrifugal pump middle sections are shown, which are the first-stage centrifugal pump middle section assembly 7, the second-stage centrifugal pump middle section assembly 8, the third-stage centrifugal pump middle section assembly 9, the centrifugal pump middle section assembly without numbering and the final-stage centrifugal pump middle section assembly 16.

[0039] In the utility model, the water inlet section 15 sleeved on the outside of the centrifugal pump shaft 10 is located on the maintenance base 1. When the height of the water inlet section 15 installed for maintenance is different, an iron block of corresponding height can be supported in advance under the base bracket of the water inlet section 15, which determines the position height between the centrifugal pump shaft 10 and the water inlet section 15 and the maintenance base 1.

[0040] By turning the rotating handle 1304 provided at the lower end of the adjusting screw rod 1302, the first-stage centrifugal pump middle section assembly 7, the second-stage centrifugal pump middle section assembly 8 and the third-stage centrifugal pump middle section assembly 9 placed on the support block 1305 in the lifting support frame 13 can move up and down and adjust with the adjusting screw rod 1302 to make them have the same height as the water inlet section 15, ensuring that the centrifugal pump shaft 10 in a horizontal state is aligned with each stage of the centrifugal pump middle section assembly to be installed, just like Figure 1 The central end faces of the first-stage centrifugal pump middle section assembly 7, the second-stage centrifugal pump middle section assembly 8, the third-stage centrifugal pump middle section assembly 9 and the final-stage centrifugal pump middle section assembly 16 are kept in a vertical state, which greatly facilitates the calibration of the centrifugal pump middle section assembly and effectively improves the maintenance efficiency.

[0041] On the basis of the above-mentioned embodiment 1, the utility model also has the following embodiments: A preferred embodiment: movable rails 3 are also provided on both sides of the maintenance base 1, and a movable support frame 4 can be placed in the movable rails 3, and an assembly height adjustment mechanism is also provided in the movable support frame 4, and the middle section assembly 16 of the final centrifugal pump can be placed on the support block 1305 in the movable support frame 4 and can move up and down with the adjustment screw 1302. In order to further reduce the labor intensity of maintenance personnel, ensure the personal safety of maintenance personnel, and further improve maintenance efficiency, the utility model is specially provided with a movable support frame 4, and an assembly height adjustment mechanism is also provided in the movable support frame 4, which facilitates the transfer of each centrifugal pump middle section assembly and puts it on the outside of the centrifugal pump shaft 10, and the final centrifugal pump middle section assembly 16 can be directly placed in the movable support frame 4 for adjustment. After the adjustment and installation are completed, the movable support frame 4 is removed. The process of transferring the final centrifugal pump middle section assembly 16 to the lifting support frame 13 for adjustment can be omitted. By turning the locking nut at the front end of the tensioning screw 12 with a manual tool or an electric tool, the force-applying plate 14 is driven to tighten the water inlet section 15 and the first-stage centrifugal pump middle section assembly 7, the second-stage centrifugal pump middle section assembly 8, the third-stage centrifugal pump middle section assembly 9 and the final-stage centrifugal pump middle section assembly 16 in the movable support frame 4, and fix them against the outside of the centrifugal pump shaft 10.

[0042] A preferred embodiment: an adaptable maintenance base 18 is further provided on the maintenance base 1 between the two movable rails 3, and the water inlet section 15, the lifting support frame 13 and the movable support frame 4 can all be fixed on the adaptable maintenance base 18. The height of the first-stage centrifugal pump middle section assembly 7, the second-stage centrifugal pump middle section assembly 8, the third-stage centrifugal pump middle section assembly 9 and other centrifugal pump middle section assemblies can be adjusted by the lifting support frame 13 and the movable support frame 4 on the adaptable maintenance base 18.

[0043] A preferred embodiment: the adapting maintenance base 18 is an L-shaped frame and is provided with an adapting foot 18-1 at the front end, the height of the adapting foot 18-1 is equal to the difference between the center height of the water inlet section 15 in the centrifugal pump to be installed and the center height of the pump shaft 10 of the centrifugal pump; the structure and shape of the adapting foot 18-1 are consistent with the structure and shape of the foot support of the water inlet section 15, and the adapting foot 18-1 is provided with a bolt hole that can be connected to the foot support of the water inlet section 15, so as to fix the water inlet section 15 and the adapting foot 18-1 together. In this way, the utility model can meet the maintenance requirements of large-scale horizontal multi-stage centrifugal pump disassembly and assembly devices of different models by replacing the adapting maintenance base 18 provided with adapting feet 18-1 of different heights, and ensure the stability of the water inlet section 15 in the device.

[0044] A preferred embodiment: the assembly height adjustment mechanism in the lifting support frame 13 is also provided with a lifting support seat, and the lifting support seat is provided with two threaded holes. The support block 1305 is fixedly connected with two adjusting screw rods 1302 installed in the threaded holes in the lifting support seat.

[0045] A preferred embodiment: a component placement groove 1301 is provided at the upper end of the support block 1305. The component placement groove 1301 is an arc-shaped groove, which is convenient for placing maintenance components, such as a centrifugal pump middle section assembly to be repaired or installed.

[0046] A preferred embodiment: two bearings 1306 are welded to the lower ends of the two support blocks 1305 corresponding to the two adjusting screw rods 2, and screw thread sleeves 1303 are welded to the upper or lower ends or both ends of the two threaded holes in the lifting support seat, and the adjusting screw rod 1302 can be screwed out of the screw thread sleeve 1303 and connected to the bearing 1306. The working stability of the adjusting screw rod 1302 can be increased, so that the support block 1305 can lift the centrifugal pump middle section assembly upward or downward to adjust the distance between the support block 1305 and the centrifugal pump shaft 10.

[0047] A preferred embodiment: the movable support frame 4 is further provided with support legs 6 and a transverse plate, the assembly height adjustment mechanism installed in the movable support frame 4 is fixed in the middle of the transverse plate, the support block 1305 is fixedly connected with the adjustment screw 1302 installed in two threaded holes in the transverse plate; the support legs 6 are fixed on both sides of the two ends of the transverse plate, and the roller 5 is installed at the lower end of each support leg 6. The movable support frame 4 can move forward and backward along the moving track 3 to transport the parts to be repaired.

[0048] A preferred embodiment: a screw threaded sleeve 1303 is welded at the upper end or the lower end or both ends of the two threaded holes in the horizontal plate, and the adjusting screw 1302 can be screwed out from the screw threaded sleeve 1303 and connected to the bearing 1306; the two movable rails 3 are fixed on both sides of the maintenance base 1 behind the fixed support frame 2, and the track grooves set in the movable rails 3 match the wheel end faces of the rollers 5 in the movable support frame 4.

[0049] A preferred embodiment: the two force-applying plates 14 are perpendicular to the tensioning screw rod 12 and welded to the rear end of the tensioning screw rod 12 , and the width and length of the force-applying plates 14 are greater than the width and thickness of the hanging ears 17 .

[0050] When it is necessary to use this device to dismantle a multi-stage centrifugal pump: according to the model of the centrifugal pump, install the adapter maintenance base 18 on the device and lower the height of the lifting support frame 13 and the movable support frame 4 so that the lifting support frame 13 and the movable support frame 4 can move under the centrifugal pump.

[0051] Lift the centrifugal pump as a whole onto the maintenance device, remove the coupling, bearing end cover and other small parts, and remove the water outlet section.

[0052] The water inlet section 15 of the centrifugal pump and the pump shaft 10 of the centrifugal pump are installed in the device, and the pump shaft 10 of the centrifugal pump is fixed by a pump shaft fixing nut 11 .

[0053] Using the movable support frame 4, each centrifugal pump middle section assembly is dismantled one by one and removed to the outside of the centrifugal pump shaft 10 fixed in the device.

[0054] When it is necessary to use this device to assemble the repaired multi-stage centrifugal pump: before using this device to assemble the repaired multi-stage centrifugal pump components, select an adapter foot 18-1 that matches the height of the water inlet section 15 in the centrifugal pump to be installed and fix the adapter repair base 18 in the repair base 1.

[0055] 1. Insert one end of the centrifugal pump shaft 10 into the pump shaft insertion hole of the fixed support frame 2, and then fix it in the fixed support frame 2 through the pump shaft fixing nut 11; 2. Use the movable support frame 4 to move the water inlet section 15 on the movable track 3 to the adapter base 18; 3. Move the centrifugal pump middle section assembly to the rear end of the water inlet section 15 one by one through the movable support frame 4, and adjust the concentricity and verticality between the centrifugal pump shaft 10 and the centrifugal pump shaft 10 by lifting the support frame 13. After adjustment, use manual tools or electric tools and the tensioning screw 12 to drive the force plate 14 to tighten the centrifugal pump middle section assembly and the water inlet section 15, and fix them with iron strips by spot welding between the centrifugal pump middle section assembly and the centrifugal pump middle section assembly; the centrifugal pump middle section assembly installed outside the centrifugal pump shaft 10 at the back can be adjusted on the movable support frame 4.

[0056] While ensuring the vertical accuracy between the centrifugal pump shaft 10 and the first-stage centrifugal pump middle section assembly 7, the device greatly improves the disassembly and assembly efficiency and saves disassembly and assembly time, and the operation is very simple and convenient, protecting equipment components from bumps and damages, and has good application value.

[0057] The embodiments described above are only typical embodiments, but the utility model is not limited to these embodiments, and those skilled in the art can make modifications without departing from the spirit and enlightenment of the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. Any modifications, equivalent replacements, improvements, etc. made within the creative spirit and creative concept of the utility model should be included in the protection scope of the utility model. Therefore, the protection scope is not limited to the above description.

Claims

1. A large-scale horizontal multi-stage centrifugal pump disassembly and assembly device, provided with a maintenance base and a fixed support frame, wherein the fixed support frame is provided with a pump shaft insertion hole and the centrifugal pump shaft can be installed, wherein the pump shaft can be inserted into the fixed support frame, and the characteristics are: A lifting support frame is also provided in the maintenance base, and an assembly height adjustment mechanism in the lifting support frame is provided with a support block and an adjusting screw, and the support block is fixedly connected to the adjusting screw; the water inlet section placed in the maintenance base is coaxial with the pump shaft of the centrifugal pump and is sleeved on the outside thereof, and the middle section assembly of the centrifugal pump to be installed is sleeved in turn behind the water inlet section; the middle section assembly of the centrifugal pump to be installed is placed on the support block of the lifting support frame and can move up and down with the adjusting screw; tensioning screws with a force-applying plate fixed at the rear end are installed on both sides of the fixed support frame, and the force-applying plate is overlapped with the hanging ears of the middle section assembly of the final-stage centrifugal pump to be installed.

2. A large-scale horizontal multistage centrifugal pump disassembly and assembly device as claimed in claim 1, characterized in that Movable tracks are also provided on both sides of the maintenance base, and a movable support frame can be placed in the movable track. The movable support frame is also provided with an assembly height adjustment mechanism. The middle section assembly of the final-stage centrifugal pump can be placed on the support block in the movable support frame and can move up and down with the adjustment screw rod.

3. A large-scale horizontal multistage centrifugal pump disassembly and assembly device as claimed in claim 2, characterized in that: An adaptor maintenance base is also provided on the maintenance base between the two movable rails, and the water inlet section, the lifting support frame and the movable support frame can all be fixed on the adaptor maintenance base.

4. A large-scale horizontal multistage centrifugal pump disassembly and assembly device as claimed in claim 3, characterized in that: The adapter repair base is an L-shaped frame and has an adapter foot at the front end. The height of the adapter foot is equal to the difference between the center height of the water inlet section in the centrifugal pump to be installed and the center height of the pump shaft of the centrifugal pump. The structure and shape of the adapter foot are consistent with the structure and shape of the foot bracket of the water inlet section, and bolt holes that can be connected to the foot bracket of the water inlet section are provided on the adapter foot to fix the water inlet section and the adapter foot together.

5. A large-scale horizontal multistage centrifugal pump disassembly and assembly device as claimed in claim 3, characterized in that: The assembly height adjustment mechanism in the lifting support frame is also provided with a lifting support seat, in which two threaded holes are provided, and the support block is fixedly connected with two adjustment screw rods installed in the threaded holes in the lifting support seat.

6. A large-scale horizontal multi-stage centrifugal pump disassembly and assembly device as claimed in claim 5, characterized in that: The upper end of the support block is provided with a component placement groove, and the component placement groove is an arc-shaped groove.

7. A large-scale horizontal multi-stage centrifugal pump disassembly and assembly device as claimed in claim 6, characterized in that: Two bearings are welded to the lower ends of the two support blocks corresponding to the two adjusting screw rods, and screw thread sleeves are welded to the upper or lower ends or both ends of the two threaded holes in the lifting support seat, and the adjusting screw rod can be screwed out of the screw thread sleeve and connected to the bearing.

8. A large-scale horizontal multi-stage centrifugal pump disassembly and assembly device as claimed in claim 6, characterized in that: The movable support frame is also provided with support legs and a cross plate. The assembly height adjustment mechanism installed in the movable support frame is fixed at the middle part of the cross plate. The support block is fixedly connected to the adjustment screw installed in the two threaded holes in the cross plate. The support legs are fixed on both sides of the two ends of the cross plate, and rollers are installed at the lower end of each support leg.

9. A large-scale horizontal multistage centrifugal pump disassembly and assembly device as claimed in claim 8, characterized in that A screw threaded sleeve is welded at the upper end or the lower end or both ends of the two threaded holes in the horizontal plate, and the adjusting screw can be screwed out of the screw threaded sleeve and connected to the bearing; the two movable rails are fixed on both sides of the maintenance base behind the fixed support frame, and the track grooves arranged in the movable rails match the wheel end faces of the rollers in the movable support frame.

10. A large-scale horizontal multi-stage centrifugal pump disassembly and assembly device as claimed in claim 3, characterized in that: The two force-applying plates are perpendicular to the tensioning screw rod and are welded to the rear end of the tensioning screw rod facing each other. The width and length of the force-applying plates are greater than the width and thickness of the hanging ears.

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