Lifting device for disassembling and assembling upper cover of rear bearing box of steam turbine

Abstract

The invention provides a steam turbine rear bearing box upper cover dismounting and hoisting device, and relates to the technical field of hoisting devices, the steam turbine rear bearing box upper cover dismounting and hoisting device comprises a cover plate and U-shaped frames, an inner cavity is formed in the upper portion of the interior of the cover plate, the U-shaped frames are movably arranged at the two ends of the interior of the inner cavity, the two sides of each U-shaped frame extend out of the cover plate, and mounting blocks are arranged below the two sides of each U-shaped frame; a first sliding groove is formed in the mounting block; a lifting machine is connected with a lifting lug, a cover plate covers the outer side of an upper cover, an adsorption positioning piece is adsorbed to the outer side of the upper cover for positioning, the cover plate is controlled to descend slowly in cooperation with contraction of a pneumatic cylinder, and in the process, the positions of a U-shaped frame and an I-shaped block are adjusted according to the hole position for installing a bolt on the upper cover, so that a screw rod faces a screw hole of the upper cover; the screw rod is installed in the screw hole of the upper cover in a threaded mode through rotation of the rotating roller in cooperation with descending of the cover plate, then a lifting machine can lift the cover plate to pull the upper cover, four-point positioning is achieved, lifting stress is more balanced, and other parts are prevented from being damaged.

Description

Technical Field

[0001] The invention relates to the technical field of lifting devices, in particular to a lifting device for disassembling and assembling an upper cover of a rear bearing box of a steam turbine. Background Art

[0002] The turbine rear bearing box is a key component of the turbine. It is installed at the rear of the turbine rotor and mainly bears the weight and torque of the rear of the rotor. It ensures the safe and stable operation of the rotor by fixing the rear of the rotor. The rear bearing box has a complex structure, including the main bearing, interference contact bearing, position ring, vibration detector and other parts, and needs to consider factors such as vibration and vibration control. At the same time, it also provides installation space for bearings and bearing seats, and is filled with lubricating oil to lubricate the bearings to ensure the efficient operation of the turbine. In the repair and maintenance of the rear bearing box of the turbine, it is necessary to remove the upper cover of the rear bearing box. The upper cover and the lower cover of the bearing box are fixed by bolts at multiple points, and the joint surface of the upper cover and the lower cover is sealed with sealant. The viscosity of the sealant makes it difficult to remove the upper covers of the front and rear bearing boxes of the turbine. Therefore, in the prior art, after the bolts are removed, the upper cover is generally disassembled and assembled by lifting. Generally, lifting ears are welded on the upper cover, and then a wire rope and a hand winch are used to slowly lift the cover in cooperation with a lifting crane. Due to the uneven force points of the lifting, the upper cover is easy to deflect during lifting, and the rear bearing, vibration probe and other components of the turbine are easily damaged during the lifting process. In addition, the lifting process takes too much time and is inefficient. Therefore, the present invention proposes a lifting device for disassembling and assembling the upper cover of the rear bearing box of the turbine to solve the problems existing in the prior art. Summary of the invention

[0003] In view of the above problems, the present invention proposes a disassembly and lifting device for the upper cover of the rear bearing box of a steam turbine. The disassembly and lifting device for the upper cover of the rear bearing box of the steam turbine adjusts the positions of the U-shaped frame and the I-shaped block according to the hole positions of the bolts on the upper cover, so that the screw rod is directed toward the screw hole of the upper cover. By rotating the roller and coordinating the lowering of the cover plate, the screw rod is threadedly installed into the screw hole of the upper cover. Then the crane can lift the cover plate to pull the upper cover. The four-point positioning makes the lifting force more balanced and avoids damage to other components.

[0004] To achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a steam turbine rear bearing box upper cover disassembly and lifting device, including a cover plate and a U-shaped frame, an inner cavity is provided above the cover plate, and U-shaped frames are movably provided at both ends of the inner cavity, the cover plate is extended from both sides of the U-shaped frame, and mounting blocks are provided below both sides of the U-shaped frame, a first slide groove is provided on the mounting block, and an I-shaped block is movably provided inside the first slide groove, a roller is rotatably provided inside the I-shaped block, a support plate is provided above the roller, a mounting plate is provided below the roller, and a screw rod is installed at the lower end of the mounting plate; The four corners of the top of the cover plate are provided with lifting ears, and the inside of the lifting ears is provided with lifting holes. The middle positions of the two sides of the cover plate are provided with pneumatic cylinders, and the output ends of the pneumatic cylinders are provided with adsorption positioning parts.

[0005] A further improvement is that: both ends of both sides of the cover plate are provided with second slide grooves, and the second slide grooves are connected with the inner cavity, and the U-shaped frame passes through the second slide grooves.

[0006] A further improvement is that drive grooves are provided at both ends of the top of the cover plate, and the drive grooves are connected to the inner cavity, a threaded wire shaft is rotatably provided inside the drive groove and is rotated by a motor, a nut block is provided at the middle position of the top of the U-shaped frame, and the nut block extends into the interior of the drive groove and is threadably adapted to the threaded wire shaft.

[0007] A further improvement is that one end of the I-shaped block is closed, and an upper and lower cavity are provided inside the closed end of the I-shaped block, and a gear and a first motor are provided inside the upper and lower cavities respectively, and the output end of the first motor is connected to the gear.

[0008] A further improvement is that a tooth groove is provided at one end of the mounting block, and the gear is matched with the tooth groove.

[0009] A further improvement is that a second motor is provided at one end of the top of the I-beam block, and a track wheel is provided at the output end of the second motor, track teeth are provided on the outer side of the support plate, and a track is connected between the track wheel and the support plate.

[0010] A further improvement is that a mounting hole is provided at the middle position of the bottom of the mounting plate, a fastening screw is provided on the side of the mounting plate, the fastening screw extends to the inside of the mounting hole, an insertion hole is provided above the outer side of the screw rod, the screw rod is used to be inserted into the inside of the mounting hole, and the inner end of the fastening screw is used to be inserted into the inside of the insertion hole to fix the screw rod.

[0011] A further improvement is that the mounting hole is also used for inserting a mounting screwdriver, and a fixing hole is provided above the outer side of the screwdriver, and the inner end of the fastening screw is used for inserting into the inside of the fixing hole to fix the screwdriver.

[0012] A further improvement is that the adsorption positioning member includes a soft board and a suction cup, the suction cup is arranged at the bottom of the soft board, and there are multiple groups of suction cups, and the inside of the soft board is connected to the suction cup.

[0013] A further improvement is that a suction pump is provided at the middle end of the inner cavity, and a hose is connected to the input end of the suction pump, and the lower end of the hose is connected to the soft board.

[0014] The beneficial effects of the present invention are: 1. The present invention connects the lifting ears through a crane, covers the cover plate to the outside of the upper cover, and positions it by adsorbing the positioning parts on the outside of the upper cover, and cooperates with the contraction of the pneumatic cylinder to control the cover plate to descend slowly. In this process, according to the hole positions of the bolts on the upper cover, the two groups of U-shaped frames are moved to adjust the positions, and the I-shaped blocks are synchronously controlled to move and change their positions on the first slide slot, so that the screw rod is directed toward the screw hole of the upper cover, and the screw rod is threadedly installed into the screw hole of the upper cover through the rotation of the roller and the descent of the cover plate. Then the crane can lift the cover plate to pull the upper cover, with four-point positioning, the lifting force is more balanced, and damage to other components is avoided. There is no need to additionally weld lifting parts on the upper cover, and the lifting efficiency is higher.

[0015] 2. The present invention can change the positions of the two sets of U-shaped frames by rotating the threaded shaft to drive the nut block to move along the driving groove. By rotating the gear and adapting the tooth groove, the I-shaped block is driven to move along the first sliding groove to change its position, thereby adapting to screw holes at different positions on different upper covers, and has a wide range of applications.

[0016] 3. The bottom of the mounting plate of the present invention can be disassembled and assembled by fastening the screw pins, and the screw rod can be replaced with a screwdriver. In this way, when the bolts of the upper cover and the lower cover are not removed, the screwdriver can be used to adapt the bolts to rotate, and the positioning piece can be adsorbed on the outer side of the upper cover for positioning, and the cover plate can be slowly raised by extending the pneumatic cylinder, so that the bolts can be removed, and the functions are diversified. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the structure at A in the middle; Figure 3 It is a schematic diagram of a U-shaped frame of the present invention; Figure 4 It is a schematic diagram of an I-shaped block of the present invention; Figure 5 It is a schematic diagram of the installation of the screwdriver of the present invention; Figure 6 It is a schematic diagram of the adsorption positioning member of the present invention.

[0018] Among them: 1. cover plate; 2. U-shaped frame; 3. inner cavity; 4. first slide groove; 5. I-shaped block; 6. roller; 7. support plate; 8. mounting plate; 9. screw rod; 10. lifting ear; 11. pneumatic cylinder; 12. second slide groove; 13. driving groove; 14. threaded shaft; 15. nut block; 16. gear; 17. first motor; 18. tooth groove; 19. second motor; 20. crawler; 21. mounting block; 22. fastening screw; 23. screwdriver; 24. soft board; 25. suction cup; 26. suction pump; 27. hose. DETAILED DESCRIPTION

[0019] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0020] Embodiment 1 according to Figure 1 , 2 , 3, 4, 5, and 6, the present embodiment proposes a steam turbine rear bearing box upper cover disassembly and lifting device, comprising a cover plate 1 and a U-shaped frame 2, an inner cavity 3 is provided above the cover plate 1, and U-shaped frames 2 are movably provided at both ends of the inner cavity 3, both sides of the U-shaped frame 2 extend out of the cover plate 1, and mounting blocks 21 are provided below both sides of the U-shaped frame 2, a first slide groove 4 is provided on the mounting block 21, and an I-shaped block 5 is movably provided inside the first slide groove 4, a rotating roller 6 is rotatably provided inside the I-shaped block 5, and a supporting plate 7 is provided above the rotating roller 6, a mounting plate 8 is provided below the rotating roller 6, and a screw rod 9 is installed at the lower end of the mounting plate 8; The four corners of the top of the cover plate 1 are provided with lifting ears 10, and the inside of the lifting ears 10 is provided with lifting holes. The middle positions of the two sides of the inside of the cover plate 1 are provided with pneumatic cylinders 11, and the output end of the pneumatic cylinder 11 is provided with adsorption positioning parts. When in use, the lifting ears 10 are connected by a crane, and the cover plate 1 is covered on the outside of the upper cover, and the adsorption positioning parts are adsorbed on the outside of the upper cover for positioning, and the pneumatic cylinder 11 is contracted to control the cover plate 1 to slowly descend. In this process, according to the hole positions of the bolts on the upper cover, the two groups of U-shaped frames 2 are moved to adjust the position, and the I-shaped block 5 is synchronously controlled to move and change the position on the first slide 4, so that the screw rod 9 is directed toward the screw hole of the upper cover, and the screw rod 9 is threadedly installed into the screw hole of the upper cover through the rotation of the roller 6, and the cover plate 1 is descended. Then the crane can lift the cover plate 1 to pull the upper cover, and the four-point positioning makes the lifting force more balanced to avoid damage to other components. There is no need to weld lifting parts on the upper cover, and the lifting efficiency is higher.

[0021] The two ends of both sides of the cover plate 1 are provided with a second slide groove 12, and the second slide groove 12 is connected with the inner cavity 3, and the U-shaped frame 2 passes through the second slide groove 12. The second slide groove 12 is used to guide the movement of the U-shaped frame 2. The two ends of the top of the cover plate 1 are provided with a driving groove 13, and the driving groove 13 is connected with the inner cavity 3. The internal rotation of the driving groove 13 is provided with a threaded wire shaft 14 and is driven to rotate by a motor. A nut block 15 is provided at the middle position of the top of the U-shaped frame 2, and the nut block 15 extends to the inside of the driving groove 13 and is threadedly adapted to the threaded wire shaft 14. When in use, the motor drives the threaded wire shaft 14 to rotate and drive the nut block 15 to move along the driving groove 13, so that the position of the two groups of U-shaped frames 2 can be changed, so that the position of the screw rod 9 is adapted to the screw holes at different positions on different upper covers, and the scope of application is wide.

[0022] One end of the I-shaped block 5 is closed, and an upper and lower cavity are provided inside the closed end of the I-shaped block 5, and a gear 16 and a first motor 17 are provided inside the upper and lower cavities respectively, and the output end of the first motor 17 is connected to the gear 16. One end of the mounting block 21 is provided with a tooth groove 18, and the gear 16 is adapted to the tooth groove 18. When in use, the first motor 17 drives the gear 16 to rotate, adapts to the tooth groove 18, and drives the I-shaped block 5 to move and change its position along the first slide groove 4, so that the position of the screw rod 9 is adapted to screw holes at different positions on different upper covers, and has a wide range of applications.

[0023] A second motor 19 is provided at one end of the top of the I-shaped block 5, and a track wheel is provided at the output end of the second motor 19, track teeth are provided on the outer side of the support plate 7, and a track 20 is connected between the track wheel and the support plate 7. When in use, the second motor 19 drives the support plate 7 to rotate through the track wheel and the track 20, so that the roller 6 rotates, and the screw rod 9 is threadedly installed into the screw hole of the upper cover in coordination with the descent of the cover plate 1, and then the crane can lift the cover plate 1 to pull the upper cover.

[0024] A mounting hole is provided at the middle position of the bottom of the mounting plate 8, a fastening screw 22 is provided on the side of the mounting plate 8, the fastening screw 22 extends to the inside of the mounting hole, an insertion hole is provided above the outer side of the screw rod 9, the screw rod 9 is used to be inserted into the inside of the mounting hole, and the inner end of the fastening screw 22 is used to be inserted into the inside of the insertion hole to fix the screw rod 9. It is convenient to install or remove the screw rod 9.

[0025] The mounting hole is also used to insert a mounting screwdriver 23, and a fixing hole is provided above the outer side of the screwdriver 23, and the inner end of the fastening screw 22 is used to be inserted into the fixing hole to fix the screwdriver 23. The bottom of the mounting plate 8 can be replaced with a screwdriver 23 by disassembling and assembling the fastening screw 22, so that when the bolts of the upper cover and the lower cover are not removed, the screwdriver 23 can be used to adapt the bolts to rotate, and the positioning piece can be adsorbed on the outer side of the upper cover for positioning, and the air pressure cylinder 11 is extended to control the cover plate 1 to rise slowly, so that the bolts can be removed, and the functions are diversified.

[0026] Embodiment 2 according to Figure 1 , 2, 3, 4, 5, and 6, the present embodiment proposes a steam turbine rear bearing box upper cover disassembly and lifting device, comprising a cover plate 1 and a U-shaped frame 2, an inner cavity 3 is provided above the cover plate 1, and U-shaped frames 2 are movably provided at both ends of the inner cavity 3, both sides of the U-shaped frame 2 extend out of the cover plate 1, and mounting blocks 21 are provided below both sides of the U-shaped frame 2, a first slide groove 4 is provided on the mounting block 21, and an I-shaped block 5 is movably provided inside the first slide groove 4, a rotating roller 6 is rotatably provided inside the I-shaped block 5, and a supporting plate 7 is provided above the rotating roller 6, a mounting plate 8 is provided below the rotating roller 6, and a screw rod 9 is installed at the lower end of the mounting plate 8; The four corners of the top of the cover plate 1 are provided with lifting ears 10, and the inside of the lifting ears 10 is provided with lifting holes. The middle positions of the two sides of the inside of the cover plate 1 are provided with pneumatic cylinders 11, and the output end of the pneumatic cylinder 11 is provided with adsorption positioning parts. When in use, the lifting ears 10 are connected by a crane, and the cover plate 1 is covered on the outside of the upper cover, and the adsorption positioning parts are adsorbed on the outside of the upper cover for positioning, and the pneumatic cylinder 11 is contracted to control the cover plate 1 to slowly descend. In this process, according to the hole positions of the bolts on the upper cover, the two groups of U-shaped frames 2 are moved to adjust the position, and the I-shaped block 5 is synchronously controlled to move and change the position on the first slide 4, so that the screw rod 9 is directed toward the screw hole of the upper cover, and the screw rod 9 is threadedly installed into the screw hole of the upper cover through the rotation of the roller 6, and the cover plate 1 is descended. Then the crane can lift the cover plate 1 to pull the upper cover, and the four-point positioning makes the lifting force more balanced to avoid damage to other components. There is no need to weld lifting parts on the upper cover, and the lifting efficiency is higher.

[0027] A mounting hole is provided at the middle position of the bottom of the mounting plate 8, a fastening screw 22 is provided on the side of the mounting plate 8, the fastening screw 22 extends to the inside of the mounting hole, an insertion hole is provided above the outer side of the screw rod 9, the screw rod 9 is used to be inserted into the inside of the mounting hole, and the inner end of the fastening screw 22 is used to be inserted into the inside of the insertion hole to fix the screw rod 9. It is convenient to install or remove the screw rod 9.

[0028] The adsorption positioning member includes a soft board 24 and a suction cup 25, wherein the suction cup 25 is arranged at the bottom of the soft board 24, and the suction cup 25 is provided in multiple groups, and the inside of the soft board 24 is connected to the suction cup 25. A suction pump 26 is arranged at the middle end of the inner cavity 3, and a hose 27 is connected to the input end of the suction pump 26, and the lower end of the hose 27 is connected to the soft board 24. When in use, the lifting ear 10 is connected to the cover plate 1 through the crane, and the cover plate 1 is covered to the outer side of the upper cover. At this time, the pneumatic cylinder 11 extends to the longest position, and the suction cup 25 is adsorbed onto the upper cover. The suction pump 26 provides the suction force of the suction cup 25, and the curvature of the soft plate 24 adapts to the curvature of the upper cover. Therefore, the cover plate 1 is positioned on the outer side of the upper cover, and the pneumatic cylinder 11 is contracted to control the cover plate 1 to slowly descend. In this process, according to the hole position of the bolt installation on the upper cover, the two groups of U-shaped frames 2 are moved to adjust the position, and the I-shaped block 5 is synchronously controlled to move and change its position on the first slide groove 4, so that the screw rod 9 is directed toward the screw hole of the upper cover, and the screw rod 9 is threadedly installed into the screw hole of the upper cover through the rotation of the roller 6. In cooperation with the descent of the cover plate 1, the crane can lift the cover plate 1 to pull the upper cover. The four-point positioning makes the lifting force more balanced to avoid damage to other components. There is no need to additionally weld lifting parts on the upper cover, and the lifting efficiency is higher.

[0029] The disassembly and assembly lifting device of the upper cover of the rear bearing box of the steam turbine is connected to the lifting ear 10 by a crane, and the cover plate 1 is covered on the outer side of the upper cover, and is positioned by adsorbing the positioning piece on the outer side of the upper cover, and the cover plate 1 is controlled to slowly descend by contraction of the pneumatic cylinder 11. In this process, according to the hole positions of the bolts installed on the upper cover, the two groups of U-shaped frames 2 are moved to adjust the position, and the I-shaped block 5 is synchronously controlled to move and change its position on the first slide groove 4, so that the screw rod 9 is directed toward the screw hole of the upper cover, and the screw rod 9 is threadedly installed into the screw hole of the upper cover by rotating the roller 6 and cooperating with the descent of the cover plate 1. Then the crane can lift the cover plate 1 to pull the upper cover, with four-point positioning, the lifting force is more balanced, and damage to other components is avoided. There is no need to additionally weld lifting parts on the upper cover, and the lifting efficiency is higher. The screw thread shaft 14 is rotated to drive the nut block 15 to move along the driving groove 13, so that the positions of the two sets of U-shaped frames 2 can be changed. The gear 16 is rotated to adapt the tooth groove 18, and the I-shaped block 5 is driven to move along the first slide groove 4 to change the position, so as to adapt to the screw holes at different positions on different upper covers, and the application range is wide. At the same time, the bottom of the mounting plate 8 can be disassembled and assembled by fastening the screw pin 22, and the screw rod 9 can be replaced with a screwdriver 23. In this way, when the bolts of the upper cover and the lower cover are not removed, the screwdriver 23 can be used to adapt the bolts to rotate, and the positioning piece is adsorbed on the outer side of the upper cover for positioning, and the air pressure cylinder 11 is extended to control the cover plate 1 to rise slowly, so that the bolts can be removed, and the functions are diversified.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A steam turbine rear bearing box upper cover disassembly and assembly lifting device, comprising a cover plate (1) and a U-shaped frame (2), characterized in that: An inner cavity (3) is provided above the cover plate (1), and U-shaped frames (2) are movably provided at both ends of the inner cavity (3), both sides of the U-shaped frame (2) extend out of the cover plate (1), and mounting blocks (21) are provided below both sides of the U-shaped frame (2), a first slide groove (4) is provided on the mounting block (21), and an I-shaped block (5) is movably provided inside the first slide groove (4), a rotating roller (6) is rotatably provided inside the I-shaped block (5), a supporting plate (7) is provided above the rotating roller (6), a mounting plate (8) is provided below the rotating roller (6), and a screw rod (9) is installed at the lower end of the mounting plate (8); Lifting ears (10) are provided at the four corners of the top of the cover plate (1), and lifting holes are provided inside the lifting ears (10). Pneumatic cylinders (11) are provided at the middle positions of both sides inside the cover plate (1), and adsorption positioning pieces are provided at the output ends of the pneumatic cylinders (11).

2. The steam turbine rear bearing box upper cover disassembly and assembly lifting device according to claim 1, characterized in that: Second slide grooves (12) are provided at both ends of both sides of the cover plate (1), and the second slide grooves (12) are communicated with the inner cavity (3), and the U-shaped frame (2) passes through the second slide grooves (12).

3. The steam turbine rear bearing box upper cover disassembly and assembly lifting device according to claim 2, characterized in that: Both ends of the top of the cover plate (1) are provided with driving grooves (13), and the driving grooves (13) are in communication with the inner cavity (3). A threaded shaft (14) is rotatably provided inside the driving groove (13) and is driven to rotate by a motor. A nut block (15) is provided at the middle position of the top of the U-shaped frame (2), and the nut block (15) extends into the interior of the driving groove (13) and is threadably adapted to the threaded shaft (14).

4. The steam turbine rear bearing box upper cover disassembly and assembly lifting device according to claim 1, characterized in that: One end of the I-shaped block (5) is closed, and an upper and lower cavity are provided inside the closed end of the I-shaped block (5), and a gear (16) and a first motor (17) are provided inside the upper and lower cavities respectively, and an output end of the first motor (17) is connected to the gear (16).

5. The steam turbine rear bearing box upper cover disassembly and assembly lifting device according to claim 4, characterized in that: One end of the mounting block (21) is provided with a tooth groove (18), and the gear (16) is adapted to fit the tooth groove (18).

6. The steam turbine rear bearing box upper cover disassembly and assembly lifting device according to claim 1, characterized in that: A second motor (19) is provided at one end of the top of the I-shaped block (5), and a track wheel is provided at the output end of the second motor (19). Track teeth are provided on the outer side of the support plate (7), and a track (20) is connected between the track wheel and the support plate (7).

7. The steam turbine rear bearing box upper cover disassembly and assembly lifting device according to claim 1, characterized in that: A mounting hole is provided at the middle position of the bottom of the mounting plate (8), a fastening screw pin (22) is provided on the side of the mounting plate (8), the fastening screw pin (22) extends into the interior of the mounting hole, an insertion hole is provided above the outer side of the screw rod (9), the screw rod (9) is used to be inserted into the interior of the mounting hole, and the inner end of the fastening screw pin (22) is used to be inserted into the interior of the insertion hole to fix the screw rod (9).

8. The steam turbine rear bearing box upper cover disassembly and assembly lifting device according to claim 7, characterized in that: The mounting hole is also used for inserting a mounting screwdriver (23), and a fixing hole is provided above the outer side of the screwdriver (23), and the inner end of the fastening screw pin (22) is used for inserting into the fixing hole to fix the screwdriver (23).

9. The steam turbine rear bearing box upper cover disassembly and assembly lifting device according to claim 1, characterized in that: The adsorption positioning member comprises a soft plate (24) and a suction cup (25), wherein the suction cup (25) is arranged at the bottom of the soft plate (24), and a plurality of groups of suction cups (25) are provided, and the interior of the soft plate (24) is communicated with the suction cups (25).

10. A steam turbine rear bearing box upper cover disassembly and assembly lifting device according to claim 9, characterized in that: A suction pump (26) is provided at the middle end of the inner cavity (3), and a hose (27) is connected to the input end of the suction pump (26), and the lower end of the hose (27) is connected to the soft board (24).

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