Integrated hoisting maintenance platform for nuclear power main pump motor

Abstract

The invention relates to the technical field of hoisting maintenance platforms, and discloses a nuclear power main pump motor integrated hoisting maintenance platform which comprises a main body and two connecting frames, the two connecting frames are fixedly connected to the outer wall of the main body, the tops of the two connecting frames are fixedly connected with connecting positioning frames, and the tops of the two connecting positioning frames are fixedly connected with stable extension frames. The device further comprises a hoisting mechanism which is arranged at the top of the main body and comprises a hydraulic lifting column. The main pump motor and the original position are always in a vertical state, the main pump motor can vertically descend after the main pump motor is overhauled, the phenomenon of large deviation between the main pump motor and the original position during resetting after the main pump motor is overhauled is avoided, the adjustment amplitude of the main pump motor can be reduced, and the adjustment efficiency of the main pump motor is improved. The situation that the position of the main pump motor is difficult to adjust accurately due to the fact that the size quality of the main pump motor is large is avoided, and the resetting installation accuracy and the installation efficiency of the main pump motor are improved.

Description

Technical Field

[0001] The invention relates to the technical field of hoisting and maintenance platforms, and in particular to an integrated hoisting and maintenance platform for a nuclear power main pump motor. Background Art

[0002] Large motors such as nuclear power plants require regular preventive maintenance. Due to their large size and weight, the removal and installation of heavy parts such as end covers, sliding bearings, couplings, etc. require the use of hoisting machines in factories or workshops to carry out hoisting work, so as to hoist the motors to the maintenance platform for maintenance.

[0003] When overhauling the main pump motor, it is necessary to use a hoisting machine to hoist the main pump motor onto the maintenance platform for overhaul. However, after the main pump motor is hoisted onto the maintenance platform, the position of the main pump motor will change greatly from the installation joint. When the main pump motor is reset after the overhaul is completed, there will be a large deviation between the main pump motor and the installation position. In addition, because the main pump motor is generally large in size, it is difficult to accurately adjust the position of the main pump motor, which affects the reset installation of the main pump motor and has low practicality. Summary of the invention

[0004] The purpose of the present invention is to provide an integrated hoisting and maintenance platform for nuclear power main pump motors to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is an integrated hoisting and maintenance platform for a nuclear power main pump motor, comprising a main body and two connecting frames, both of which are fixedly connected to the outer wall of the main body, both of which are fixedly connected to connecting and positioning frames on the top, and both of which are fixedly connected to stable extension frames on the top, and further comprising:

[0007] The lifting mechanism is arranged on the top of the main body, and the lifting mechanism includes a hydraulic lifting column, which is fixedly connected to the top of the main body, and the output end of the hydraulic lifting column is fixedly connected to a telescopic frame, and the telescopic frame is slidably connected to a sliding extension column on the side away from the hydraulic lifting column, and a heavy-duty crane is fixedly connected to the sliding extension column on the side away from the hydraulic lifting column, and a sliding hole frame is fixedly connected to the side of the heavy-duty crane away from the sliding extension column, and a sliding rod is slidably connected inside the sliding hole frame, and the bottom of the sliding rod is fixedly connected to a limited top plate;

[0008] The merging mechanism is arranged on the outer wall of the stable extension frame. The merging mechanism includes a sliding column, which is slidably connected to the top of the stable extension frame. The bottom of the sliding column is fixedly connected to the push frame. Both sides of the push frame are rotatably connected to merging bars. The angle between the two merging bars is greater than sixty degrees. The ends of the two merging bars away from the push frame are respectively rotatably connected to the merging frame.

[0009] Furthermore, an extension frame is fixedly connected to one side of the connecting frame away from the retracting frame, two engaging grooves are provided on the top of the stable extension frame, stable extension frames are slidably connected to both sides of the retracting frame, an installation and fixing structure is provided at the bottom of the main body, and a sliding bar is fixedly connected to one side of the retracting frame away from the main body.

[0010] Furthermore, the lifting mechanism also includes two extension hydraulic cylinders, both of which are fixedly connected to the outer wall of the heavy-duty crane, the output end of the extension hydraulic cylinder is fixedly connected to the outer wall of the telescopic frame, a tension spring is fixedly connected between the slide hole frame and the top of the slide rod, the sling at the output end of the heavy-duty crane slides through the limiting top plate, and a connecting and fixing structure is provided at the end of the sling at the output end of the heavy-duty crane away from the heavy-duty crane, and the top of the connecting and fixing structure is abutted against the bottom of the limiting top plate, and the top of the slide rod is abutted against the bottom of the push frame.

[0011] Furthermore, the merging mechanism also includes two connecting screw sleeves, which are respectively fixedly connected to the sides of the two merging frames away from each other. The connecting screw sleeves slide through the connecting frames, and the connecting screw sleeves are internally threadedly connected with a rotating gear screw, which is rotatably connected to the top of the connecting frame.

[0012] Furthermore, a transmission gear is fixedly connected to the side of the rotating gear screw away from the connecting frame, and a stabilizing groove is opened on the opposite sides of the two merging frames. The two merging frames are fixedly connected to the limiting platform support frame on the sides away from the retracting frame. The merging frame is slidably connected to the sliding bars on the retracting frame, and a positioning support groove frame is fixedly connected to the top of the sliding column. A reset spring is fixedly connected between the positioning support groove frame and the stabilizing extension frame.

[0013] Furthermore, a positioning mechanism is provided at the top of the stable extension frame, and the positioning mechanism includes two sliding columns, which slide through the outer walls of the two connecting positioning frames respectively. The two sliding columns are fixedly connected to the limiting support plates on one side close to the stable extension frame, and the bottoms of the two limiting support plates are both against the mating grooves at the top of the stable extension frame.

[0014] Furthermore, the tops of the two limit support plates are abutted against the bottom of the positioning groove frame, the sliding column and the side of the limit support plate away from the stable extension frame are fixedly connected to two limit brackets, the limit brackets between the two limit support plates and the two sliding columns are fixedly connected with contraction springs, and the two limit support plates are fixedly connected with a thrust hydraulic cylinder.

[0015] Furthermore, a closing mechanism is provided at the bottom of the merging frame, and the closing mechanism includes a gear screw sleeve frame, which is rotatably connected in the extension frame, and a connecting gear is fixedly connected to the side of the gear screw sleeve frame away from the connecting frame, and the connecting gear is meshed with the transmission gear, and a fixed screw is threadedly connected to the inside of the gear screw sleeve frame, and the thread pitch on the fixed screw is twice the thread pitch of the rotating gear screw, and the fixed screw is fixedly connected to the closing frame on the side of the fixed screw away from the extension frame.

[0016] Furthermore, two shrinkage slide slot frames are fixedly connected to the bottom of the closed frame, a shrinkage slot is provided at the top of the closed frame, a through hole is provided through the bottom of the closed frame, an inclined block is slidably connected inside the through hole, and a plurality of engaging semicircular blocks are connected to the top of the inclined block. The engaging semicircular blocks are retracted inside the shrinkage slot at the top of the closed frame, and an extrusion bracket is slidably connected inside the two shrinkage slide slot frames. A compression spring is fixedly connected to the rear wall of the extrusion bracket and the inner wall of the back side of the shrinkage slide slot frame, and a roller is provided at a position corresponding to the rear wall of the extrusion bracket and the inclined surface of the inclined block. The engaging semicircular blocks are used in correspondence with the stabilizing slot on the merging frame. There are two closing mechanisms, and the two closing mechanisms are symmetrically distributed with the main body as the center.

[0017] The present invention has the following beneficial effects:

[0018] (1) After the heavy-duty crane of the present invention lifts the main pump motor to a certain height, the top of the connecting and fixing device at the bottom of the sling will be against the limit top plate, and the main pump motor will be continuously lifted by the heavy-duty crane, pushing the slide bar to rise inside the slide hole frame and stretching the tension spring at the same time. When the top of the slide bar is against the bottom of the push frame, the limit top plate and the top of the main pump motor will be above the two merging frames, and the main pump motor will be continuously driven to rise, so that the top of the slide bar will continue to be against the bottom of the push frame, so that the slide column slides on the top of the stable extension frame and the reset spring will be stretched at the same time. During the rising process of the push frame, the two merging bars are rotated on both sides of the push frame respectively, so that the bottoms of the two merging bars are close to each other, so that the push frame and The connection parts of the merging strips and the connection parts of the merging frames and the merging strips are perpendicular to each other. At the same time, the two merging frames are merged, and the outer wall of the main pump motor is against the inside of the stabilizing groove between the two merging frames, so as to stabilize the main pump motor lifted onto the maintenance platform, so that the main pump motor is always vertical to the original position. After the main pump motor is overhauled, the main pump motor can be lowered vertically to avoid a large deviation between the main pump motor and the original installation position when the main pump motor is reset after the overhaul is completed. The adjustment range of the main pump motor can be reduced to avoid the difficulty in accurately adjusting the position of the main pump motor due to the large size and mass of the main pump motor, thereby improving the accuracy and efficiency of the reset installation of the main pump motor.

[0019] (2) During the merging process of the two merging frames of the present invention, the connecting screw sleeve will be driven to move synchronously inside the connecting frame. During the movement of the connecting screw sleeve, the rotating gear screw will be driven to rotate. The thread pitch of the rotating gear screw is half of the thread pitch of the fixed screw, thereby increasing the rotation speed of the rotating gear screw. The gear on the rotating gear screw is meshed with the gear on the gear screw sleeve, driving the gear screw sleeve to rotate synchronously inside the extension frame. The thread pitch on the fixed screw is greater than the thread pitch of the rotating gear screw, so that the moving distance of the fixed screw is twice the moving distance of the merging frame. Therefore, after the two merging frames are merged, the two closed frames can be moved to the bottom of the stable groove where the two merging frames are connected, thereby closing the bottom of the main pump motor, avoiding maintenance tools or other items from falling through the merged stable groove to the connection of the main pump motor under the maintenance platform during maintenance, thereby avoiding affecting the reset installation of the main pump motor.

[0020] (3) In the process of merging two closed frames of the present invention, when the two groups of extrusion and abutment frames contact each other, the retracted embedded semicircular block on the top of the closed frame is located at the edge of the stable groove. Because the size of the embedded semicircular block is smaller than the size of the stable groove on the merging frame, when the two groups of extrusion and abutment frames continue to abut each other, they squeeze the inclined surfaces of the inclined plane blocks on both sides, thereby driving the inclined plane blocks to slide upward inside the through hole, so that the embedded semicircular block moves out of the top of the closed frame and enters the inside of the merging frame. When the two merging frames and the closed frame are spliced, the top of the embedded semicircular blocks on the top of the two closed frames abuts against the bottom of the main pump motor, thereby supporting the main pump motor and improving the stability of the main pump motor on the maintenance platform. When the positioning groove frame rises to the top, the thrust hydraulic cylinder will release force, and the elastic force of the contraction spring will make the two groups of limit support plates enter between the positioning groove frame and the stable extension frame, so as to position the positioning groove frame and the stable extension frame, avoid the positioning groove frame from falling and affecting the maintenance of the main pump motor, thereby improving the practicality of the device.

[0021] (4) An installation platform for integrated lifting and maintenance equipment is constructed above the main pump motor, so that the integrated lifting and maintenance platform is vertically arranged above the main pump motor, and is connected and fixed to the maintenance platform through a main body and a stable extension frame. The heavy-duty crane is controlled by extending the hydraulic cylinder to slide inside the telescopic frame through a sliding extension column, so that the sling at the output end of the heavy-duty crane is perpendicular to the main pump motor. After the sling at the output end of the heavy-duty crane is fixed to the main pump motor, the heavy-duty crane is started to lift the main pump motor vertically, and the main pump motor is always suspended above the maintenance platform, so that workers can easily repair the main pump motor on the maintenance platform.

[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is an overall cross-sectional view of the present invention;

[0026] Figure 3 It is a schematic diagram of the positioning mechanism structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the main structure of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the hoisting mechanism of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the merging mechanism of the present invention;

[0030] Figure 7 It is a schematic diagram of the structure of the closing mechanism of the present invention;

[0031] Figure 8 for Figure 3 Enlarged view of point A in the middle.

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] In the figure: 1. Main body; 101. Retracting frame; 102. Connecting frame; 103. Extension frame; 104. Connecting and positioning frame; 105. Stable extension frame; 2. Lifting mechanism; 201. Hydraulic lifting column; 202. Telescopic frame; 203. Sliding extension column; 204. Heavy lifting machine; 205. Extension hydraulic cylinder; 206. Sliding hole frame; 207. Sliding rod; 208. Limiting top plate; 209. Tension spring; 3. Merging mechanism; 301. Connecting screw rod sleeve frame; 302. Rotating gear screw rod; 303. Merging frame; 304 , limit platform support frame; 305, merging strip; 306, pushing frame; 307, sliding column; 308, reset spring; 309, positioning support frame; 4, positioning mechanism; 401, sliding column; 402, limit support plate; 403, thrust hydraulic cylinder; 404, limit support frame; 405, contraction spring; 5, closing mechanism; 501, gear screw sleeve frame; 502, fixed screw; 503, closing frame; 504, contraction slide frame; 505, through hole; 506, inclined block; 507, embedded semicircular block; 508, extrusion support frame. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example 1, please refer to Figure 1-Figure 8 As shown, the present invention is a nuclear power main pump motor integrated hoisting and maintenance platform, including a main body 1 and two connecting frames 102, the two connecting frames 102 are fixedly connected to the outer wall of the main body 1, the tops of the two connecting frames 102 are fixedly connected to connecting and positioning frames 104, the tops of the two connecting and positioning frames 104 are fixedly connected to stable extension frames 105, and also includes:

[0036] The lifting mechanism 2 is arranged on the top of the main body 1. The lifting mechanism 2 includes a hydraulic lifting column 201, which is fixedly connected to the top of the main body 1. The output end of the hydraulic lifting column 201 is fixedly connected to a telescopic frame 202. The telescopic frame 202 is slidably connected to a sliding extension column 203 on the side away from the hydraulic lifting column 201. The side of the sliding extension column 203 away from the hydraulic lifting column 201 is fixedly connected to a heavy-duty crane 204. The side of the heavy-duty crane 204 away from the sliding extension column 203 is fixedly connected to There is a sliding hole frame 206, and a sliding rod 207 is slidably connected inside the sliding hole frame 206. The bottom of the sliding rod 207 is fixedly connected to the limited top plate 208. The lifting mechanism 2 also includes two extension hydraulic cylinders 205. The two extension hydraulic cylinders 205 are fixedly connected to the outer wall of the heavy crane 204. The output end of the extension hydraulic cylinder 205 is fixedly connected to the outer wall of the telescopic frame 202. A tension spring 209 is fixedly connected between the sliding hole frame 206 and the top of the sliding rod 207. The sling at the output end of the heavy crane 204 slides through the limited top plate 208. The end of the sling at the output end of the heavy-duty crane 204 away from the heavy-duty crane 204 is provided with a connecting and fixing structure, and the top of the connecting and fixing structure is against the bottom of the limit top plate 208, and the top of the slide bar 207 is against the bottom of the push frame 306. The heavy-duty crane 204 is controlled to slide inside the telescopic frame 202 through the sliding extension column 203 by extending the hydraulic cylinder 205, so that the sling at the output end of the heavy-duty crane 204 is perpendicular to the main pump motor. After the sling at the output end of the heavy-duty crane 204 is fixed to the main pump motor, the heavy-duty crane 204 is started. The heavy-duty crane 204 lifts the main pump motor vertically. After the heavy-duty crane 204 lifts the main pump motor to a certain height, the top of the connecting and fixing device at the bottom of the sling will be against the limit top plate 208. The main pump motor is continuously lifted by the heavy-duty crane 204, pushing the slide bar 207 to rise inside the slide hole frame 206, and stretching the tension spring 209 at the same time. When the top of the slide bar 207 is against the bottom of the push frame 306, the limit top plate 208 and the top of the main pump motor will be above the two merging frames 303;

[0037] The merging mechanism 3 is arranged on the outer wall of the stable extension frame 105, and the merging mechanism 3 includes a sliding column 307, the sliding column 307 is slidably connected to the top of the stable extension frame 105, and the bottom of the sliding column 307 is fixedly connected to the pushing frame 306, and the two sides of the pushing frame 306 are rotatably connected with the merging bars 305, and the angle between the two merging bars 305 is greater than sixty degrees, and the ends of the two merging bars 305 away from the pushing frame 306 are respectively rotatably connected to the merging frames 303, and the merging mechanism 3 also includes two connecting screw rod racks 301, and the two connecting screw rod racks 301 are respectively fixedly connected to the sides of the two merging frames 303 away from each other, and the connecting screw rod racks 301 slide through the connecting frame 102, and the connecting screw rod racks 301 are internally threadedly connected with a rotating gear screw rod 302, and the rotating gear screw rod 302 is rotatably connected to the top of the connecting frame 102, and the side of the rotating gear screw rod 302 away from the connecting frame 102 is fixedly connected with a transmission gear, and the opposite sides of the two merging frames 303 are provided with stable The two merging frames 303 are respectively fixedly connected to the limited platform abutment frame 304 on one side away from the contraction frame 101, the merging frame 303 is slidably connected to the sliding bar on the contraction frame 101, and the top of the sliding column 307 is fixedly connected to the positioning abutment frame 309, and the positioning abutment frame 309 and the stable extension frame 105 are fixedly connected with a return spring 308. When the main pump motor is continuously driven to rise, the top of the slide bar 207 is continuously abutted against the bottom of the push frame 306, so that the sliding column 307 slides on the top of the stable extension frame 105, and the return spring 308 is stretched. During the rising process of the push frame 306, the two merging bars 305 are respectively rotated on both sides of the push frame 306, so that the bottoms of the two merging bars 305 are close to each other, so that the connection between the push frame 306 and the merging bar 305 and the connection between the merging frame 303 and the merging bar 305 are perpendicular to each other, and at the same time, the two merging frames 303 are merged, and the outer wall of the main pump motor is abutted against the inside of the stable groove directly between the two merging frames 303;

[0038] The side of the connecting frame 102 away from the contraction frame 101 is fixedly connected to the extension frame 103, and two engaging grooves are provided on the top of the stable extension frame 105. The two sides of the contraction frame 101 are slidably connected to the stable extension frame 105. The bottom of the main body 1 is provided with a mounting and fixing structure, and the side of the contraction frame 101 away from the main body 1 is fixedly connected to a slide bar. An installation platform for integrated hoisting and maintenance equipment is built in the area above the main pump motor, so that the integrated hoisting and maintenance platform is vertically arranged above the main pump motor, and is connected and fixed to the maintenance platform through the main body 1 and the stable extension frame 105;

[0039] A positioning mechanism 4 is provided at the top of the stable extension frame 105, and the positioning mechanism 4 includes two sliding columns 401, and the two sliding columns 401 slide through the outer walls of the two connection positioning frames 104 respectively, and the two sliding columns 401 are fixedly connected to the limited support plate 402 on one side close to the stable extension frame 105, and the bottoms of the two limited support plates 402 are abutted against the fitting grooves at the top of the stable extension frame 105, and the tops of the two limited support plates 402 are abutted against the bottom of the positioning groove frame 309, and the sliding columns 401 and the limited support plates 402 are fixedly connected to the two limited support frames 404 on the side away from the stable extension frame 105, and the limited support frames 404 between the two limited support plates 402 and the two sliding columns 401 are fixedly connected with a contraction spring 405, and a thrust hydraulic cylinder 403 is fixedly connected between the two limited support plates 402;

[0040] The merging frame 303 is provided with a closing mechanism 5 at the bottom thereof, and the closing mechanism 5 includes a gear screw sleeve 501, which is rotatably connected to the extension frame 103, and a connecting gear is fixedly connected to the side of the gear screw sleeve 501 away from the connecting frame 102, and the connecting gear is meshed with the transmission gear, and a fixed screw 502 is threadedly connected to the inside of the gear screw sleeve 501, and the thread pitch on the fixed screw 502 is twice the thread pitch of the rotating gear screw 302, and the fixed screw 502 is away from the extension frame 103. A closed frame 503 is fixedly connected to one side, two shrinkage chute frames 504 are fixedly connected to the bottom of the closed frame 503, a shrinkage groove is opened at the top of the closed frame 503, a through hole 505 is opened through the bottom of the closed frame 503, a slope block 506 is slidably connected inside the through hole 505, a plurality of chimeric semicircular blocks 507 are connected to the top of the chimeric semicircular blocks 506, the chimeric semicircular blocks 507 shrink inside the shrinkage groove at the top of the closed frame 503, and an extrusion bracket 508 is slidably connected inside the two shrinkage chute frames 504. The wall is fixedly connected to the inner wall of the back of the shrink slide frame 504 with a compression spring, and a roller is arranged at a place corresponding to the inclined surface of the inclined surface block 506 on the rear wall of the extrusion frame 508. The semicircular block 507 is used in conjunction with the stable groove on the merging frame 303. There are two closing mechanisms 5, which are symmetrically distributed with the main body 1 as the center. The thread pitch of the rotating gear screw 302 is half of the thread pitch of the fixed screw 502, so that the rotation speed of the rotating gear screw 302 can be increased. 2 is meshed with the gear on the gear screw sleeve 501, driving the gear screw sleeve 501 to rotate synchronously inside the extension frame 103. The thread pitch on the fixed screw 502 is greater than the thread pitch of the rotating gear screw 302, so that the moving distance of the fixed screw 502 is twice the moving distance of the 301 merging frame 303. Therefore, after the two merging frames 303 are merged, the two closing frames 503 can be moved to the bottom of the stable groove where the two merging frames 303 are docked, thereby sealing the bottom of the main pump motor.

[0041] When in use, an installation platform for the integrated lifting and maintenance equipment is built in the upper area of ​​the main pump motor, so that the integrated lifting and maintenance platform is vertically arranged above the main pump motor, and is connected and fixed to the maintenance platform through the main body 1 and the stable extension frame 105, and the heavy-duty crane 204 is controlled by extending the hydraulic cylinder 205 to slide inside the telescopic frame 202 through the sliding extension column 203, so that the sling at the output end of the heavy-duty crane 204 is perpendicular to the main pump motor. After the sling at the output end of the heavy-duty crane 204 is fixed to the main pump motor, the heavy-duty crane 204 is started to lift the main pump motor vertically. After the heavy-duty crane 204 lifts the main pump motor to a certain height, the top of the connecting and fixing device at the bottom of the sling will be against the limit top plate 208. The main pump motor is continuously lifted by the heavy-duty crane 204, and the sliding rod 207 is pushed up inside the sliding hole frame 206, and the tension spring 209 is stretched at the same time. When the top of the sliding rod 207 is against the bottom of the push frame 306, the limit top plate 208 The top of the main pump motor will be above the two merging frames 303, and when the main pump motor is continuously driven to rise, the top of the slide bar 207 will continue to abut against the bottom of the push frame 306, so that the slide column 307 slides on the top of the stable extension frame 105, and at the same time, the reset spring 308 is stretched. During the rising process of the push frame 306, the two merging bars 305 are rotated on both sides of the push frame 306 respectively, so that the bottoms of the two merging bars 305 are close to each other, so that the connection between the push frame 306 and the merging bar 305 and the connection between the merging frame 303 and the merging bar 305 are perpendicular to each other. At the same time, the two merging frames 303 are merged, and the outer wall of the main pump motor is abutted against the inside of the stable groove directly between the two merging frames 303, thereby stabilizing the main pump motor lifted to the maintenance platform, so that the main pump motor is always in a vertical state with the original position, and the main pump motor can be vertically lowered after the main pump motor is overhauled to avoid the phenomenon of large deviation between the main pump motor and the original installation position when the main pump motor is reset after the overhaul is completed.

[0042] Example 2, please refer to Figure 1-Figure 8As shown, when in use, during the merging process of the two merging frames 303, the connecting screw sleeve 301 will be driven to move synchronously inside the connecting frame 102, and during the movement of the connecting screw sleeve 301, the rotating gear screw 302 will be driven to rotate, and the thread pitch of the rotating gear screw 302 is half of the thread pitch of the fixed screw 502, so that the rotation speed of the rotating gear screw 302 can be increased, and the gear on the rotating gear screw 302 is meshed with the gear on the gear screw sleeve 501, so that the gear screw sleeve 501 is driven to rotate synchronously inside the extension frame 103, and the thread pitch on the fixed screw 502 is greater than the thread pitch of the rotating gear screw 302, so that the moving distance of the fixed screw 502 is twice the moving distance of the 301 merging frame 303, so that after the two merging frames 303 are merged, the two closing frames 503 can be moved to the bottom of the stable groove where the two merging frames 303 are docked, thereby closing the bottom of the main pump motor;

[0043] During the merging process of the two closed frames 503, when the two groups of extrusion and abutment frames 508 come into contact, the chimeric semicircular block 507 at the top of the closed frame 503 that has shrunk is located at the edge of the stable groove. Since the size of the chimeric semicircular block 507 is smaller than the size of the stable groove on the merging frame 303, when the two groups of extrusion and abutment frames 508 continue to abut against each other, they squeeze the inclined surfaces of the inclined plane blocks 506 on both sides, thereby driving the inclined plane blocks 506 to slide upward inside the through hole 505, so that the chimeric semicircular block 507 moves out of the top of the closed frame 503 and enters the inside of the merging frame 303. When the two merging frames are 303. After the closed frames 503 are spliced, the tops of the interlocking semicircular blocks 507 on the tops of the two closed frames 503 are abutted against the bottom of the main pump motor, thereby supporting the main pump motor. When the positioning groove frame 309 rises to the top, the thrust hydraulic cylinder 403 is relieved, and the elastic force of the contraction spring 405 causes the two sets of limit support plates 402 to enter between the positioning groove frame 309 and the stable extension frame 105, so as to position the positioning groove frame 309 and the stable extension frame 105, and prevent the positioning groove frame 309 from falling and affecting the maintenance of the main pump motor.

[0044] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A nuclear power main pump motor integrated hoisting and maintenance platform, comprising a main body (1) and two connecting frames (102), the two connecting frames (102) are fixedly connected to the outer wall of the main body (1), the tops of the two connecting frames (102) are fixedly connected to connecting and positioning frames (104), the tops of the two connecting and positioning frames (104) are fixedly connected to stabilizing extension frames (105), characterized in that: Also includes: A hoisting mechanism (2), wherein the hoisting mechanism (2) is arranged on the top of the main body (1), and the hoisting mechanism (2) comprises a hydraulic lifting column (201), wherein the hydraulic lifting column (201) is fixedly connected to the top of the main body (1), wherein the output end of the hydraulic lifting column (201) is fixedly connected to a telescopic frame (202), wherein the telescopic frame (202) is slidably connected to a sliding extension column (203) on a side away from the hydraulic lifting column (201), wherein the sliding extension column (203) is fixedly connected to a heavy-duty crane (204) on a side away from the hydraulic lifting column (201), wherein the heavy-duty crane (204) is fixedly connected to a sliding hole frame (206) on a side away from the sliding extension column (203), wherein the sliding hole frame (206) is slidably connected to a sliding rod (207), wherein the bottom of the sliding rod (207) is fixedly connected to a limited top plate (208); A merging mechanism (3), the merging mechanism (3) is arranged on the outer wall of the stable extension frame (105), the merging mechanism (3) includes a sliding column (307), the sliding column (307) is slidably connected to the top of the stable extension frame (105), the bottom of the sliding column (307) is fixedly connected to a push frame (306), both sides of the push frame (306) are rotatably connected to the merging bars (305), the angle between the two merging bars (305) is greater than sixty degrees, and the ends of the two merging bars (305) away from the push frame (306) are respectively rotatably connected to the merging frame (303).

2. The nuclear power main pump motor integrated hoisting and maintenance platform according to claim 1 is characterized by: The connecting frame (102) is fixedly connected to an extension frame (103) on a side away from the retracting frame (101); two engaging grooves are provided on the top of the stable extension frame (105); both sides of the retracting frame (101) are slidably connected to the stable extension frames (105); a mounting and fixing structure is provided at the bottom of the main body (1); and a sliding bar is fixedly connected to the side of the retracting frame (101) away from the main body (1).

3. The nuclear power main pump motor integrated hoisting and maintenance platform according to claim 2 is characterized by: The hoisting mechanism (2) further comprises two extension hydraulic cylinders (205), both of which are fixedly connected to the outer wall of the heavy-duty crane (204); the output end of the extension hydraulic cylinder (205) is fixedly connected to the outer wall of the telescopic frame (202); a tension spring (209) is fixedly connected between the slide hole frame (206) and the top of the slide rod (207); the sling at the output end of the heavy-duty crane (204) slides through the limit top plate (208); a connection fixing structure is provided at one end of the sling at the output end of the heavy-duty crane (204) away from the heavy-duty crane (204); the top of the connection fixing structure abuts against the bottom of the limit top plate (208); and the top of the slide rod (207) abuts against the bottom of the push frame (306).

4. The nuclear power main pump motor integrated hoisting and maintenance platform according to claim 3 is characterized by: The merging mechanism (3) further comprises two connecting screw sleeves (301), wherein the two connecting screw sleeves (301) are respectively fixedly connected to the sides of the two merging frames (303) that are away from each other, and the connecting screw sleeves (301) slide through the connecting frame (102), and the connecting screw sleeves (301) are internally threadedly connected with a rotating gear screw (302), and the rotating gear screw (302) is rotatably connected to the top of the connecting frame (102).

5. The nuclear power main pump motor integrated hoisting and maintenance platform according to claim 4 is characterized by: The side of the rotating gear screw (302) away from the connecting frame (102) is fixedly connected to a transmission gear, and the opposite sides of the two merging frames (303) are each provided with a stabilizing groove. The sides of the two merging frames (303) away from the shrinking frame (101) are respectively fixedly connected to a limiting platform support frame (304). The merging frame (303) is slidably connected to a slide bar on the shrinking frame (101), and a positioning support groove frame (309) is fixedly connected to the top of the sliding column (307). A return spring (308) is fixedly connected between the positioning support groove frame (309) and the stabilizing extension frame (105).

6. The nuclear power main pump motor integrated hoisting and maintenance platform according to claim 5 is characterized by: A positioning mechanism (4) is provided at the top of the stable extension frame (105), and the positioning mechanism (4) includes two sliding columns (401). The two sliding columns (401) slide through the outer walls of the two connecting positioning frames (104) respectively, and the two sliding columns (401) are fixedly connected to the limiting support plate (402) on one side close to the stable extension frame (105), and the bottoms of the two limiting support plates (402) are both against the fitting grooves at the top of the stable extension frame (105).

7. The nuclear power main pump motor integrated hoisting and maintenance platform according to claim 6 is characterized by: The tops of the two limit support plates (402) are both against the bottom of the positioning groove frame (309), the sliding column (401) and the side of the limit support plate (402) away from the stable extension frame (105) are fixedly connected to two limit brackets (404), the limit brackets (404) between the two limit support plates (402) and the two sliding columns (401) are fixedly connected with a contraction spring (405), and the two limit support plates (402) are fixedly connected with a thrust hydraulic cylinder (403).

8. The nuclear power main pump motor integrated hoisting and maintenance platform according to claim 7 is characterized by: A closing mechanism (5) is provided at the bottom of the merging frame (303), and the closing mechanism (5) comprises a gear screw sleeve (501), and the gear screw sleeve (501) is rotatably connected in the extension frame (103); a connecting gear is fixedly connected to the side of the gear screw sleeve (501) away from the connecting frame (102), and the connecting gear is meshed with the transmission gear; a fixed screw (502) is internally threadedly connected to the gear screw sleeve (501), and the thread pitch on the fixed screw (502) is twice the thread pitch of the rotating gear screw (302); and the closing frame (503) is fixedly connected to the side of the fixed screw (502) away from the extension frame (103).

9. The nuclear power main pump motor integrated hoisting and maintenance platform according to claim 8 is characterized by: The bottom of the closed frame (503) is fixedly connected to two shrinkage chute frames (504), the top of the closed frame (503) is provided with a shrinkage groove, the bottom of the closed frame (503) is provided with a through hole (505), the inside of the through hole (505) is slidably connected to an inclined surface block (506), the top of the inclined surface block (506) is connected to a plurality of embedded semicircular blocks (507), the embedded semicircular blocks (507) are shrunk in the shrinkage groove at the top of the closed frame (503), and the two shrinkage chute frames (504) are shrunk to the inside of the shrinkage groove at the top of the closed frame (503). The frame (504) is internally slidably connected with an extrusion support frame (508), the rear wall of the extrusion support frame (508) and the inner wall of the back side of the shrinkage slide frame (504) are fixedly connected with a compression spring, a roller is provided at a point corresponding to the rear wall of the extrusion support frame (508) and the inclined surface of the inclined surface block (506), the engaging semicircular block (507) is used in correspondence with the stabilizing groove on the merging frame (303), and there are two closing mechanisms (5), and the two closing mechanisms (5) are symmetrically distributed with the main body (1) as the center.

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