A hoisting device for steam turbine installation of a thermal power plant

Abstract

The utility model discloses a hoist device for steam turbine installation of thermal power plant, and its technical scheme main points are: including two support beams, two support beams interval arrangement, the outside of two support beams all is provided with cross hole, the inside of two cross holes is slidably connected with the sliding block respectively, and the mobile block is arranged between two support beams, the top of mobile block is provided with two limit hole, the inner circular wall surface of limit hole is movably connected with the limit post, the bottom fixed connection of limit post has the support shell, the bottom fixed connection of mobile block has the electric hoist, through the cooperation between the electric hoist, limit post, limit hole and support shell of setting, makes the electric hoist when hoisting support shell, and limit post slides in the inside of limit hole, makes steam turbine in the process of lifting and putting down not to produce the shaking, reduces steam turbine in the hoisting process, and the risk of knocking of steam turbine damage caused by shaking.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine installation technology, specifically to a lifting device for installing steam turbines in thermal power plants. Background Technology

[0002] The steam turbine system (i.e., the steam turbine system) of a thermal power plant is the core energy conversion device of the power plant. It is responsible for converting the thermal energy of steam into mechanical energy to drive the generator to produce electricity. Fuel combustion produces high-temperature, high-pressure steam (boiler stage), which drives the turbine blades to rotate, converting thermal energy into mechanical energy, and then driving the generator to convert it into electrical energy.

[0003] During the installation of steam turbines in thermal power plants, lifting equipment is required to lift the turbine components one by one and install them step by step. In existing technology, when using lifting equipment to lift steam turbines in thermal power plants, steel wire ropes are usually passed through hooks and the first gear of the turbine, and then the turbine components are lifted by a lifting device for movement and installation. During the process of lifting, starting, and installing the turbine using steel wire ropes, the turbine components will sway due to the weight of the turbine and the inertia generated during movement. Since the turbine components are large objects, swaying may cause collisions and affect the service life of the turbine. Therefore, it is necessary to wait for the swaying amplitude of the turbine to decrease before the workers can carry out subsequent operations, which increases the workers' working time and affects their work efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a lifting device for the installation of steam turbines in thermal power plants.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A lifting device for installing steam turbines in a thermal power plant includes two support beams spaced apart. Each support beam has a cross-shaped hole on its exterior, and a slider is slidably connected inside each cross-shaped hole. A movable block is positioned between the two support beams. The top of the movable block has two limiting holes, and a limiting post is movably fitted onto the inner circular wall of each limiting hole. A support shell is fixedly connected to the bottom of each limiting post. An electric hoist is fixedly connected to the bottom of the movable block, and the bottom of the electric hoist is fixedly connected to the support shell. A clamping assembly is provided inside the support shell.

[0006] To enable the clamping assembly to move up and down reciprocally for clamping objects of relatively low height, as a preferred embodiment of this utility model for a lifting device for installing steam turbines in a thermal power plant, the clamping assembly comprises: a first gear disposed inside the support shell; a first motor fixedly connected to the outside of the support shell; a drive shaft of the first motor fixedly connected to the first gear; a second gear disposed inside the support shell; the first gear meshing with the second gear; connecting rods fixedly connected to the outer circular walls of the first gear and the second gear respectively; a connecting block fixedly connected to the bottom of the connecting rod and passing through the connecting rod; a first connecting plate movably sleeved on the outer circular wall of the connecting block; a second connecting plate movably sleeved on the bottom of the first connecting plate; a rotating rod movably sleeved on the outer circular wall of the second connecting plate; a movable plate fixedly connected to the outer circular wall of the second connecting plate; positioning holes provided at the bottom of both movable plates; a support column movably sleeved between the two positioning holes and passing through the two positioning holes; and a fixing block movably sleeved on the top of the rotating rod, the fixing block being fixedly connected to the support shell.

[0007] In order to enable the clamped object and clamping components to move back and forth so as to accurately place the suspended object, as a lifting device for the installation of steam turbines in thermal power plants according to this utility model, preferably, a slider is slidably connected inside the cross hole, a second threaded rod is fixedly connected inside the cross hole, the slider is threadedly connected to the second threaded rod, a second motor is fixedly connected to the outside of the support beam, and the drive shaft of the second motor is fixedly connected to the second threaded rod.

[0008] In order to enable the lifted object to move back and forth during the lifting process so as to adjust the position of the lifted object, as a preferred embodiment of the lifting device for the installation of steam turbines in thermal power plants according to this utility model, a first support rod is fixedly connected between the two sliders, a first threaded rod is fixedly connected between the two sliders, the first threaded rod is threadedly connected to the moving block, the moving block is movably sleeved with the first support rod, and a third motor is fixedly connected to the outside of the slider, and the drive shaft of the third motor is threadedly connected to the first threaded rod.

[0009] In order to prevent the connecting rod from getting stuck during rotation, as a lifting device for installing steam turbines in thermal power plants according to this utility model, preferably, rectangular holes are opened on both sides of the outer side of the support shell.

[0010] In order to fix the first gear and prevent the two second gears from not meshing, as a lifting device for installing steam turbines in thermal power plants according to this utility model, a fixing block is preferably fixedly connected inside the support shell, and the fixing block is movably sleeved with the second gear.

[0011] In summary, the present invention has the following main advantages: 1. By cooperating with the electric hoist, limit post, limit hole, and support shell, the limit post slides inside the limit hole when the electric hoist lifts the support shell, preventing the turbine from shaking during lifting and lowering. This reduces the risk of damage to the turbine caused by shaking during lifting, and facilitates stable installation of the turbine by subsequent personnel.

[0012] 2. Through the mutual cooperation between the first motor, first gear, second gear, connecting rod, first connecting plate, connecting block, rotating rod, moving plate and support column, the first motor drive shaft drives the first gear and second gear to mesh and rotate, which can flexibly adjust the position of the positioning plate, facilitate the matching of the positioning plate and the turbine lifting ring, achieve the effect of quick lifting and installation of the turbine, and improve the efficiency of workers in lifting and installing the turbine.

[0013] 3. Through the cooperation between the rectangular hole, connecting rod, second gear, first gear and first motor, the connecting rod can continue to rotate through the rectangular hole during rotation, reducing the risk of the connecting plate hitting the bottom of the support shell and jamming the connecting rod during rotation, so that the clamping assembly can clamp and lift the steam turbine. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the movable block structure of this utility model; Figure 3 This is a schematic diagram of the fixing block structure of this utility model; Figure 4 This is a schematic diagram of the movable plate structure of this utility model.

[0015] Reference numerals: 1. Support beam; 2. Cross hole; 3. First support rod; 4. First threaded rod; 5. Moving block; 6. Support shell; 7. First motor; 8. First gear; 9. Second gear; 10. Fixing block; 11. Connecting rod; 12. First connecting plate; 13. Connecting block; 14. Rotating rod; 15. Moving plate; 16. Positioning hole; 17. Support column; 18. Positioning block; 19. Electric hoist; 20. Second motor; 21. Second connecting plate; 22. Second threaded rod; 23. Rectangular hole; 24. Third motor; 25. Slider; 26. Limiting hole; 27. Limiting post. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example: Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 A hoisting device for installing steam turbines in a thermal power plant includes two support beams 1 spaced apart. Each support beam 1 has a cross-shaped hole 2 on its exterior. Sliding blocks 25 are slidably connected inside each of the two cross-shaped holes 2. A moving block 5 is positioned between the two support beams 1. Two limiting holes 26 are formed at the top of the moving block 5. Limiting posts 27 are movably fitted onto the inner circular walls of the limiting holes 26. A support shell 6 is fixedly connected to the bottom of the limiting posts 27. An electric hoist 19 is fixedly connected to the bottom of the moving block 5. The bottom of the electric hoist 19 is fixedly connected to the support shell 6. A clamping assembly is located inside the support shell 6. A first gear 8 is located inside the support shell 6. A first motor 7 is fixedly connected to the exterior of the support shell 6. The drive shaft of the first motor 7 is fixedly connected to the first gear 8. A second gear 9 is located inside the support shell 6. The first gear 8 and the second gear 9 are meshed together. The second gears 9 are evenly distributed in a semi-circular array. The outer circular walls of the first gear 8 and the second gear 9 are respectively fixedly connected to the connecting rods 11. The bottom of the connecting rods 11 is fixedly connected to the connecting block 13 and passes through the connecting rod 11. The outer circular wall of the connecting block 13 is movably sleeved with the first connecting plate 12. The bottom of the first connecting plate 12 is movably sleeved with the second connecting plate 21. The outer circular wall of the second connecting plate 21 is movably sleeved with the rotating rod 14. The outer circular wall of the second connecting plate 21 is fixedly connected with the moving plate 15. The bottom of the two moving plates 15 is provided with positioning holes 16. The two positioning holes 16 are movably sleeved between the two positioning holes 16 and pass through the two positioning holes 16. The top of the rotating rod 14 is movably sleeved with the fixing block 10. The fixing block 10 is fixedly connected to the support shell 6. The outer two sides of the support shell 6 are respectively provided with rectangular holes 23. The inside of the support shell 6 is fixedly connected with the positioning block 18. The positioning block 18 is movably sleeved with the second gear 9. According to the electric hoist 19, when the turbine needs to be lifted and installed, the electric hoist 19 is first started. The electric hoist 19 pushes the support shell 6 to move away from the moving block 5. Then, the connecting rod 11, the first connecting plate 12, the connecting block 13, the rotating rod 14, the moving plate 15, the positioning hole 16, and the support column 17 move away from the moving block 5. When they reach the edge of the turbine, the electric hoist 19 stops running. Then, the first motor 7 is started. The drive shaft of the first motor 7 rotates clockwise, which in turn drives the first gear 8 to rotate clockwise. Then, the second gear 9, which meshes with the first gear 8, begins to rotate clockwise. This causes the two connecting rods 11 to move relative to each other, slowly approaching each other, causing the two first connecting plates 12 to move relative to each other. The components move closer together, and then the rotating rod 14 and the moving plate 15 move relative to each other, gradually approaching each other. When the moving plate 15 is in contact with the lifting ring on the turbine, the operation of the first motor 7 is stopped. The support column 17 is passed through the lifting ring on the turbine and the two moving plates 15 and fixed. Then the electric hoist 19 is started, which pulls the support shell 6 towards the moving block 5. Subsequently, the connecting rod 11, the first connecting plate 12, the connecting block 13, the rotating rod 14, the moving plate 15, the positioning hole 16 and the support column 17 move towards the moving block 5, so that the turbine is lifted. This allows the position of the moving plate 15 to be flexibly adjusted, making it convenient for the moving plate 15 and the turbine lifting ring to match their positions, so that turbines of different sizes can be lifted and installed.

[0018] With the limit post 27 set, when the electric hoist 19 is lifting and installing, the limit post 27 slides inside the limit hole 26, so that the turbine will not shake during the lifting and lowering process, avoiding damage to the turbine caused by shaking, which would affect the work efficiency of the staff and increase maintenance costs.

[0019] refer to Figure 1 and Figure 2 A slider 25 is slidably connected inside the cross hole 2, and a second threaded rod 22 is fixedly connected inside the cross hole 2. The slider 25 and the second threaded rod 22 are threadedly connected. A second motor 20 is fixedly connected to the outside of the support beam 1. The drive shaft of the second motor 20 is fixedly connected to the second threaded rod 22. A first support rod 3 is fixedly connected between the two sliders 25. A first threaded rod 4 is fixedly connected between the two sliders 25. The first threaded rod 4 is threadedly connected to the moving block 5. The moving block 5 is movably sleeved with the first support rod 3. A third motor 24 is fixedly connected to the outside of the slider 25. The drive shaft of the third motor 24 is threadedly connected to the first threaded rod 4. When the clamping mechanism needs to be moved above the turbine using the second motor 20, the second motor 20 is first started. The drive shaft of the second motor 20 rotates clockwise, causing the second threaded rod 22 to rotate clockwise. This causes the slider 25 to move away from the second motor 20. Subsequently, the first support rod 3, the first threaded rod 4, the moving block 5, the support shell 6, the connecting rod 11, the first connecting plate 12, the connecting block 13, the rotating rod 14, the moving plate 15, the positioning hole 16, and the support column 17 begin to move away from the second motor 20, thus clamping the mechanism. After the mechanism moves directly above the turbine, the third motor 24 is activated. The drive shaft of the third motor 24 rotates clockwise, causing the first threaded rod 4 to rotate clockwise. This causes the moving block 5 to move away from the fixed block 10. Subsequently, the support shell 6, connecting rod 11, first connecting plate 12, connecting block 13, rotating rod 14, moving plate 15, positioning hole 16, and support column 17 begin to move away from the second motor 20. After moving to the center of the turbine, the moving plate 15 engages with the lifting ring on the turbine, allowing the support column 17 to pass through the two moving plates 15 and the turbine. After the turbine is lifted by the electric hoist 19, the second motor 20 is started. The second motor 20 drives the shaft to rotate counterclockwise, causing the second threaded rod 22 to rotate counterclockwise. This causes the slider 25 to move closer to the second motor 20. Subsequently, the first support rod 3, the first threaded rod 4, the moving block 5, the support shell 6, the connecting rod 11, the first connecting plate 12, the connecting block 13, the rotating rod 14, the moving plate 15, the positioning hole 16, and the support column 17 begin to move closer to the second motor 20. Then, the third motor 24 is started. The counterclockwise rotation of the drive shaft 24 drives the first threaded rod 4 to rotate counterclockwise, which in turn causes the moving block 5 to move closer to the fixed block 10. Subsequently, the support shell 6, connecting rod 11, first connecting plate 12, connecting block 13, rotating rod 14, moving plate 15, positioning hole 16 and support column 17 begin to move closer to the second motor 20. By repeatedly performing the above operations, the placement position of the turbine can be adjusted to avoid the need for workers to wait for the shaking to stop during the lifting and installation of the turbine, thus reducing the efficiency of the workers.

[0020] Working principle: Please refer to Figures 1-4As shown, according to the electric hoist 19, when the turbine needs to be lifted and installed, the electric hoist 19 is first started. The electric hoist 19 pushes the support shell 6 to move away from the moving block 5. Then, the connecting rod 11, the first connecting plate 12, the connecting block 13, the rotating rod 14, the moving plate 15, the positioning hole 16, and the support column 17 move away from the moving block 5. When they reach the edge of the turbine, the electric hoist 19 stops running. Then, the first motor 7 is started. The drive shaft of the first motor 7 rotates clockwise, which in turn drives the first gear 8 to rotate clockwise. Then, the second gear 9, which meshes with the first gear 8, begins to rotate clockwise. As a result, the two connecting rods 11 move relative to each other and slowly approach each other, causing the two first connecting plates 12 to move relative to each other. The components move closer together, and then the rotating rod 14 and the moving plate 15 move relative to each other, gradually approaching each other. When the moving plate 15 is in contact with the lifting ring on the turbine, the operation of the first motor 7 is stopped. The support column 17 is passed through the lifting ring on the turbine and the two moving plates 15 and fixed. Then the electric hoist 19 is started, which pulls the support shell 6 towards the moving block 5. Then the connecting rod 11, the first connecting plate 12, the connecting block 13, the rotating rod 14, the moving plate 15, the positioning hole 16 and the support column 17 move towards the moving block 5, so that the turbine is lifted. This allows the position of the moving plate 15 to be flexibly adjusted, making it convenient for the moving plate 15 and the turbine lifting ring to match the position, so as to lift and install turbines of different sizes.

[0021] With the limit post 27 set, when the electric hoist 19 is lifting and installing, the limit post 27 slides inside the limit hole 26, so that the turbine will not shake during the lifting and lowering process, avoiding damage to the turbine caused by shaking, which would affect the work efficiency of the staff and increase maintenance costs.

[0022] When the clamping mechanism needs to be moved above the turbine using the second motor 20, the second motor 20 is first started. The drive shaft of the second motor 20 rotates clockwise, causing the second threaded rod 22 to rotate clockwise. This causes the slider 25 to move away from the second motor 20. Subsequently, the first support rod 3, the first threaded rod 4, the moving block 5, the support shell 6, the connecting rod 11, the first connecting plate 12, the connecting block 13, the rotating rod 14, the moving plate 15, the positioning hole 16, and the support column 17 begin to move away from the second motor 20, thus clamping the mechanism. After the mechanism moves directly above the turbine, the third motor 24 is activated. The drive shaft of the third motor 24 rotates clockwise, causing the first threaded rod 4 to rotate clockwise. This causes the moving block 5 to move away from the fixed block 10. Subsequently, the support shell 6, connecting rod 11, first connecting plate 12, connecting block 13, rotating rod 14, moving plate 15, positioning hole 16, and support column 17 begin to move away from the second motor 20. After moving to the center of the turbine, the moving plate 15 engages with the lifting ring on the turbine, allowing the support column 17 to pass through the two moving plates 15 and the turbine. After the turbine is lifted by the electric hoist 19, the second motor 20 is started. The second motor 20 drives the shaft to rotate counterclockwise, causing the second threaded rod 22 to rotate counterclockwise. This causes the slider 25 to move closer to the second motor 20. Subsequently, the first support rod 3, the first threaded rod 4, the moving block 5, the support shell 6, the connecting rod 11, the first connecting plate 12, the connecting block 13, the rotating rod 14, the moving plate 15, the positioning hole 16, and the support column 17 begin to move closer to the second motor 20. Then, the third motor 24 is started. The counterclockwise rotation of the drive shaft 24 drives the first threaded rod 4 to rotate counterclockwise, which in turn causes the moving block 5 to move closer to the fixed block 10. Subsequently, the support shell 6, connecting rod 11, first connecting plate 12, connecting block 13, rotating rod 14, moving plate 15, positioning hole 16 and support column 17 begin to move closer to the second motor 20. By repeatedly performing the above operations, the placement position of the turbine can be adjusted to avoid the need for workers to wait for the shaking to stop during the lifting and installation of the turbine, thus reducing the efficiency of the workers.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lifting device for installing steam turbines in thermal power plants, characterized in that, include: Two support beams (1) are spaced apart. A cross hole (2) is opened on the outside of each of the two support beams (1). A slider (25) is slidably connected inside each of the two cross holes (2). A moving block (5) is provided between the two support beams (1). Two limiting holes (26) are opened on the top of the moving block (5). A limiting post (27) is movably sleeved on the inner circular wall of the limiting hole (26). A support shell (6) is fixedly connected to the bottom of the limiting post (27). An electric hoist (19) is fixedly connected to the bottom of the moving block (5). The bottom of the electric hoist (19) is fixedly connected to the support shell (6). The support shell (6) is provided with a clamping component inside.

2. The lifting device for installing steam turbines in thermal power plants according to claim 1, characterized in that, The clamping assembly includes: A first gear (8) is disposed inside the support shell (6). A first motor (7) is fixedly connected to the outside of the support shell (6). The drive shaft of the first motor (7) is fixedly connected to the first gear (8). A second gear (9) is disposed inside the support shell (6). The first gear (8) and the second gear (9) are meshed together. Connecting rods (11) are fixedly connected to the outer circular walls of the first gear (8) and the second gear (9), respectively. A connecting block (13) is fixedly connected to the bottom of the connecting rod (11) and passes through the connecting rod (11). The outer surface of the connecting block (13) is... A first connecting plate (12) is movably sleeved on the circular wall surface. A second connecting plate (21) is movably sleeved on the bottom of the first connecting plate (12). A rotating rod (14) is movably sleeved on the outer circular wall surface of the second connecting plate (21). A movable plate (15) is fixedly connected to the outer circular wall surface of the second connecting plate (21). A positioning hole (16) is opened at the bottom of each of the two movable plates (15). A support column (17) is movably sleeved between the two positioning holes (16) and passes through the two positioning holes (16). A fixing block (10) is movably sleeved on the top of the rotating rod (14). The fixing block (10) is fixedly connected to the support shell (6).

3. The lifting device for installing steam turbines in a thermal power plant according to claim 1, characterized in that: The cross hole (2) is slidably connected to a slider (25), and the cross hole (2) is fixedly connected to a second threaded rod (22). The slider (25) is threadedly connected to the second threaded rod (22). The support beam (1) is fixedly connected to a second motor (20), and the drive shaft of the second motor (20) is fixedly connected to the second threaded rod (22).

4. A lifting device for installing steam turbines in a thermal power plant according to claim 1, characterized in that: A first support rod (3) is fixedly connected between the two sliders (25), and a first threaded rod (4) is fixedly connected between the two sliders (25). The first threaded rod (4) is threadedly connected to the moving block (5), and the moving block (5) is movably sleeved with the first support rod (3). A third motor (24) is fixedly connected to the outside of the slider (25), and the drive shaft of the third motor (24) is threadedly connected to the first threaded rod (4).

5. A lifting device for installing steam turbines in a thermal power plant according to claim 1, characterized in that: Rectangular holes (23) are respectively opened on both sides of the outer side of the support shell (6).

6. A lifting device for installing steam turbines in a thermal power plant according to claim 2, characterized in that: The support shell (6) is fixedly connected to a positioning block (18), which is movably sleeved with the second gear (9).

Images