A hoist for maintenance and inspection of a steam turbine generator

Abstract

This utility model discloses a steam turbine generator maintenance and testing lifting tool, relating to the field of steam turbine generator maintenance technology. It includes a fine-tuning support assembly, an adjustment assembly, and a lifting assembly. The fine-tuning support assembly includes a support frame, a support box, a drive component, and a guide component. The adjustment assembly includes a push component, two sets of adjustment boxes, and a guide component. The lifting assembly includes a transmission worm, a lifting component, a transmission worm wheel, and a transmission component. The drive component moves the support box on the support frame, allowing for fine-tuning of the support box's position. This enables the lifting component's position to be finely adjusted along the drive component's axial direction. Combined with the push component's fine-tuning of the lifting component's position, the lifting component's position can be quickly adjusted to align with the equipment's lifting point. The transmission worm drives the transmission worm wheel to rotate, causing the lifting component to move up or down to connect with the equipment. The self-locking performance of the transmission worm and transmission worm wheel ensures a stable connection between the lifting component and the equipment, preventing slippage. This also facilitates repositioning after equipment hoisting, making maintenance easier.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine generator maintenance technology, specifically to a steam turbine generator maintenance and testing lifting tool. Background Technology

[0002] A steam turbine generator is a generator driven by a steam turbine. Superheated steam generated by a boiler enters the steam turbine, expands, and performs work, causing the blades to rotate and drive the generator to produce electricity. The exhaust gas after performing work is sent back to the boiler for recycling through a condenser, circulating water pump, condensate pump, and feedwater heating device. As a core power equipment, the steam turbine generator requires regular hoisting and maintenance of its stator, rotor, and other components. Traditional hoisting tools use hooks or wire ropes for fixing, which are prone to slippage due to vibration or uneven load during hoisting. They are also inconvenient to move, resulting in poor performance during maintenance and inspection. Therefore, it is necessary to propose a steam turbine generator maintenance and inspection hoisting tool to address the above technical problems. Utility Model Content

[0003] The main purpose of this utility model is to provide a steam turbine generator maintenance and inspection lifting tool to solve the problem that the stator or rotor is prone to slippage due to vibration or off-center load during the existing steam turbine generator maintenance process.

[0004] To achieve the above objectives, this utility model provides a steam turbine generator maintenance and inspection lifting tool, comprising: The fine-tuning support assembly includes a support frame and a support frame movably mounted on the support frame; the support frame is provided with mutually parallel driving components and guide components; the support frame is movably connected to the driving components and guide components respectively; the driving components are driven by external force to drive the support frame to reciprocate along the axial direction of the driving components. The adjustment assembly includes a pusher rotatably disposed within a support frame and two sets of adjustment boxes movably disposed on the pusher; the support frame is provided with a guide parallel to the pusher; the pusher rotates under the action of an external force to drive the two sets of adjustment boxes to move synchronously in opposite directions along the axial direction of the pusher; The hoisting assembly includes a transmission worm gear rotatably disposed within an adjustment box and a hoisting component slidably disposed on the adjustment box; a transmission worm wheel is provided outside the transmission worm gear; a transmission component is provided between the hoisting component and the transmission worm wheel; the transmission worm gear rotates under the action of an external force, so that the transmission worm wheel rotates and drives the transmission component to rotate, thereby causing the hoisting component to move up or down.

[0005] As a further improvement of this utility model, the support frame is provided with sliding rollers; the guide includes a guide rod disposed on the support frame.

[0006] As a further improvement of this utility model, the driving component includes a driving screw rotatably mounted on a support frame and a driving motor connected to the driving screw; the driving screw and the guide rod are parallel to each other.

[0007] As a further improvement of this utility model, the support frame is provided with a drive plate; the drive plate is provided with a drive screw sleeve; the drive screw sleeve is threadedly connected to the screw.

[0008] As a further improvement of this utility model, the pushing component includes a pushing screw rotatably disposed within the support frame and a pushing motor connected to the pushing screw; a pushing screw sleeve is provided on the pushing screw via threads; and the adjusting box is fixedly connected to the pushing screw sleeve.

[0009] As a further improvement of this utility model, the guide component includes a guide rod disposed within the support frame; the guide rod is located on both sides of the push screw; the adjustment box is slidably connected to the guide rod.

[0010] As a further improvement of this utility model, the lifting component includes a lifting toothed plate slidably disposed on the adjusting box and a hook disposed on the lifting toothed plate; a limiting plate is provided on the lifting toothed plate; the transmission component includes a transmission gear connected to a transmission worm gear; the transmission gear meshes with the lifting toothed plate.

[0011] The beneficial effects of this utility model are reflected in: By setting up a support frame to provide a support foundation for the entire device, and moving the support frame with the device, the position of the support frame can be finely adjusted by driving the support frame to move on the support frame. This allows the position of the lifting component to be finely adjusted along the axis of the driving component. Combined with the fine adjustment of the position of the lifting component by the push component, the position of the lifting component can be quickly adjusted to match the lifting point of the equipment. The transmission worm gear drives the transmission turbine to rotate, causing the lifting component to move up or down to connect with the equipment. The self-locking performance of the transmission worm gear and transmission worm wheel ensures a stable connection between the lifting component and the equipment. While quickly adjusting the connection between the lifting component and the equipment, the stability of the lifting is ensured, and slippage is prevented. At the same time, it is easy to move the position after the equipment is lifted, which facilitates maintenance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a steam turbine generator repair and testing lifting tool according to the present invention; Figure 2 This is a schematic diagram of the internal structure of the regulating box of a steam turbine generator maintenance and testing lifting tool according to this utility model; Figure 3 This is a schematic diagram of the pushing component structure of a steam turbine generator repair and testing lifting tool according to this utility model; Figure 4This is another internal structural diagram of the regulating box of the steam turbine generator maintenance and testing lifting tool of this utility model; Explanation of reference numerals in the attached figures: 1. Support frame; 101. Support frame body; 102. Support column; 2. Support frame; 3. Driving component; 301. Drive screw; 302. Drive motor; 4. Guide component; 401. Guide rod; 5. Pushing component; 501. Push screw; 502. Push motor; 503. Push screw sleeve; 6. Adjusting box; 7. Guide component; 8. Transmission worm gear; 9. Lifting component; 901. Lifting gear plate; 902. Lifting hook; 10. Transmission... 11. Moving worm gear; 12. Transmission component; 13. Transmission gear; 14. Sliding roller; 15. Support plate; 16. Support plate; 17. Through hole; 18. First bearing; 19. Coupling; 20. Drive plate; 21. Drive screw sleeve; 22. Sliding hole; 23. Connecting plate; 24. Guide hole; 25. Limiting plate; 26. Mounting cavity; 27. Sliding groove; 28. Limiting groove; 29. ​​Limiting rod; 20. Transmission motor; 20. Rotating shaft. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are merely some, not all, of the embodiments of this utility model. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0014] In one embodiment, see Figure 1 This utility model discloses a steam turbine generator maintenance and testing lifting tool, which includes a fine-tuning support assembly, an adjustment assembly, and a lifting assembly.

[0015] The fine-tuning support assembly includes a support frame 1 and a support frame 2 movably mounted on the support frame 1. The support frame 1 is equipped with a driving component 3 and a guide component 4 that are parallel to each other. The support frame 2 is movably connected to the driving component 3 and the guide component 4 respectively. The driving component 3 is driven by external force to drive the support frame 2 to reciprocate along the axial direction of the driving component 3. The adjustment assembly includes a pusher 5 rotatably mounted in the support frame 2 and two sets of adjustment boxes 6 movably mounted on the pusher 5. The support frame 2 is equipped with a guide component 7 parallel to the pusher 5. The pusher 5 rotates under the action of external force to drive the two sets of adjustment boxes 6 to move synchronously in opposite directions along the axial direction of the pusher 5. The hoisting assembly includes a transmission worm gear 8 rotatably mounted in the adjustment box 6 and a hoisting component 9 slidably mounted on the adjustment box 6. The transmission worm gear 8 is equipped with a transmission worm wheel 10. A transmission component 11 is provided between the hoisting component 9 and the transmission worm wheel 10. The transmission worm gear 8 rotates under the action of external force to make the transmission worm wheel 10 rotate and drive the transmission component 11 to rotate, thereby causing the hoisting component 9 to move up or down.

[0016] Further, see Figure 1 , 2 The support frame 1 is provided with sliding rollers 12, and the guide member 4 includes a guide rod 401 provided on the support frame 1.

[0017] Preferably, the support frame 1 includes a rectangular support frame 2 body 101 and four sets of support columns 102 disposed on the support frame 2 body 101. The guide rods 401 are fixedly connected to the support columns 102, and two sets of guide rods 401 are provided and are parallel to each other.

[0018] Preferably, the sliding roller 12 adopts the omnidirectional wheel in the existing structure. The omnidirectional wheel is equipped with a locking mechanism. Both the omnidirectional wheel and the locking mechanism are existing structures. It is only necessary to select the existing structure and connect it to the support column 102 by bolts or welding.

[0019] Further, see Figure 1 The driving component 3 includes a drive screw 301 rotatably mounted on the support frame 1 and a drive motor 302 connected to the drive screw 301. The drive screw 301 is parallel to the guide rod 401 in opposite planes.

[0020] Preferably, a support plate 13 is welded onto the support frame 1, and the drive motor 302 adopts a stepper motor in the existing structure. The stepper motor is mounted on the support plate 13 by bolts.

[0021] Preferably, two sets of support plates 14 are welded on the support frame 1. The support plates 14 are provided with through holes 15. A first bearing 16 is provided in the through holes 15. The two ends of the drive screw 301 are fixedly connected to the inner ring of the first bearing 16.

[0022] Preferably, the drive motor 302 and the drive screw 301 can be connected by a coupling 17.

[0023] Further, see Figure 1 The support frame 2 is provided with a drive plate 18, and the drive plate 18 is provided with a drive screw 301 set, which is threadedly connected to the screw.

[0024] Preferably, the lead screw is a ball screw, and the lead screw is connected to the drive lead screw 301 to convert rotary motion into linear motion.

[0025] Preferably, the support frame 2 is a cuboid structure, and the two ends of the support frame 2 are provided with sliding holes 20. The guide rod 401 is slidably located in the sliding holes 20. During the process of the drive screw 301 driving the drive screw 301 sleeve to move linearly, the support frame 2 moves accordingly. The guide rod 401 provides guidance and support for the support frame 2. In order to improve the transmission force of the drive screw 301, the drive screw 301 can be set in the middle position of the support frame 1, so as to facilitate transmission.

[0026] In the above setup, the support frame 1 provides a support base for the entire lifting device. The support frame 1 can be moved by the sliding rollers 12, thereby moving the adjustment component and the lifting component to the maintenance point of the turbine generator. The sliding rollers 12 are fixed by the locking structure on the sliding rollers 12, thereby fixing the position of the support frame 1 and facilitating the lifting of the parts to be repaired. By controlling the rotation of the drive motor 302, the drive screw 301 can be rotated. The drive screw 301 is threadedly connected to the drive screw 301, which can drive the support frame 2 to move linearly along the axial direction of the drive screw 301, thereby adjusting the position of the adjustment component and the lifting component on the support frame 1. Without moving the support frame 1, the position of the lifting component can be finely adjusted, making it easy to connect the lifting component to the part to be lifted.

[0027] Further, see Figure 1 , 3 The pusher 5 includes a pusher screw 501 rotatably disposed in the support frame 2, a pusher motor 502 connected to the pusher screw 501, a pusher screw 501 sleeve provided on the pusher screw 501 by means of threads, and an adjustment box 6 fixedly connected to the pusher screw 501 sleeve.

[0028] Preferably, the middle part of the support frame 2 is hollow, and a connecting plate 21 is provided on the support frame 2. A second bearing is provided on the connecting plate 21, and the two ends of the push screw 501 are respectively fixedly connected to the inner ring of the second bearing.

[0029] Preferably, the push screw 501 is divided into two sections from the center, and the threads on the two ends of the push screw 501 have opposite directions. Two sets of push screw 501 sets are provided, and the two sets of push screw 501 sets are respectively connected to the two sections of threads on the push screw 501. During the rotation of the push screw 501, the two sets of push screw 501 sets can move towards or in opposite directions.

[0030] Preferably, two sets of adjustment boxes 6 are provided, and the two sets of adjustment boxes 6 are fixedly connected to two sets of push screws 501 respectively.

[0031] Preferably, the drive motor 502 is a stepper motor in the existing structure.

[0032] Further, see Figure 1 , 3 The guide 7 includes a guide rod disposed within the support frame 2. The guide rod is located on both sides of the push screw 501, and the adjustment box 6 is slidably connected to the guide rod.

[0033] Preferably, two sets of guide rods are provided, and the adjustment box 6 is provided with guide holes 22, and the guide rods slide within the guide holes 22.

[0034] In the above configuration, by driving the motor 502 to rotate, the push screw 501 is driven to rotate. The push screw 501 is threadedly connected to the push screw 501 sleeve. When the motor 502 rotates forward, it drives the two sets of push screw 501 sleeves to move towards each other. When the motor 502 rotates in reverse, it drives the two sets of push screw 501 sleeves to move in opposite directions, thereby controlling the two sets of regulating boxes 6 to move towards or in opposite directions.

[0035] Further, see Figure 1 , 2 4. The lifting component 9 includes a lifting toothed plate 901 slidably disposed on the adjusting box 6 and a hook 902 disposed on the lifting toothed plate 901. A limiting plate 23 is provided on the lifting toothed plate 901. The transmission component 11 includes a transmission gear 1101 connected to the transmission worm gear 10. The transmission gear 1101 meshes with the lifting toothed plate 901.

[0036] Preferably, the interior of the regulating box 6 is hollow to form an installation cavity 24. The bottom end of the regulating box 6 is provided with a sliding groove 25. The lifting tooth plate 901 is slidably installed in the sliding groove 25. One end of the lifting tooth plate 901 is located in the installation cavity 24, and the other end is located outside the regulating box 6 and is fixedly connected to the hook 902.

[0037] Preferably, the side wall of the regulating box 6 is provided with a limiting groove 26, the hoisting tooth plate 901 is provided with a limiting rod 27 that slides in the limiting groove 26, and the limiting plate 23 is fixedly located on the end of the hoisting tooth plate 901 near the hook 902.

[0038] Preferably, a drive motor 28 is provided in the mounting cavity 24. The drive motor 28 is a stepper motor, and the output end of the drive motor 28 is connected to the drive worm gear 8 through a coupling.

[0039] Preferably, a third bearing is provided in the mounting cavity 24, and a rotating shaft 29 is provided on the inner ring of the third bearing. The transmission worm gear 10 and the transmission gear 1101 are installed on the rotating shaft 29 at intervals. The transmission worm gear and the transmission gear 1101 can be installed on the rotating shaft 29 by key and keyway cooperation.

[0040] In the above configuration, the transmission motor 28 drives the transmission worm 8 to rotate. The transmission worm 8 meshes with the transmission worm wheel 10, thereby driving the transmission gear 1101 to rotate. The transmission gear 1101 meshes with the lifting gear plate 901, causing the hook 902 to move up or down. By controlling the transmission motor 28 to rotate forward, the transmission gear 1101 rotates forward, causing the lifting gear plate 901 and the hook 902 to move up. By controlling the transmission motor 28 to rotate backward, the transmission gear 1101 rotates in reverse, causing the lifting gear plate 901 and the hook 902 to move down.

[0041] It should be noted that the drive motor 302, push motor 502, and transmission motor 28 involved in this application all adopt the existing stepper motor structure. This application does not propose any improvement to the internal structure of the stepper motor. The function of the stepper motor is to provide rotational force. After the drive motor 302, push motor 502, and transmission motor 28 are installed, control handles are connected to them through wires. Two sets of buttons are set on the control handles to control the stepper motor to rotate forward or backward.

[0042] In this embodiment, the entire device can be moved to the turbine generator maintenance point by pushing the support frame 1 under the action of the sliding roller 12, and the position of the support frame 1 can be fixed by the lock structure. The rotation of the drive motor 302 drives the drive screw 301 to rotate, so that the support frame 2 moves along the axial direction of the drive screw 301. Thus, the position of the hook 902 can be finely adjusted along the axial direction of the drive screw 301. By controlling the rotation of the drive motor 502 to drive the drive screw 501 to rotate, the two sets of adjustment boxes 6 can be moved in opposite directions, thereby causing the hook 902 to reciprocate along the axial direction of the drive screw 501. The position of the hook 902 can be finely adjusted along the axis of the push screw 501. In conjunction with the drive screw 301, the position of the hook 902 can be adjusted so that the hook 902 is located at the lifting point. By controlling the rotation of the transmission motor 28, the transmission worm 8 is driven to engage with the transmission turbine, and at the same time, the transmission gear 1101 is driven to mesh with the lifting gear plate 901. The height of the hook 902 can be adjusted in the vertical direction, so that the hook 902 is connected to the lifting point. The position of the hook 902 is fixed by the self-locking of the transmission worm wheel 10 and the transmission worm 8 to prevent the equipment from shifting or shaking during the lifting process.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hoist for the maintenance and inspection of a steam turbine generator, characterized in that, include: The fine-tuning support assembly includes a support frame (1) and a support frame (2) movably mounted on the support frame (1); the support frame (1) is provided with a driving component (3) and a guide component (4) that are parallel to each other; the support frame (2) is movably connected to the driving component (3) and the guide component (4) respectively; the driving component (3) is driven by external force to drive the support frame (2) to reciprocate along the axial direction of the driving component (3); The adjustment assembly includes a pusher (5) rotatably disposed within a support frame (2) and two sets of adjustment boxes (6) movably disposed on the pusher (5); the support frame (2) is provided with a guide (7) parallel to the pusher (5); the pusher (5) rotates under the action of external force to drive the two sets of adjustment boxes (6) to move synchronously towards or in opposite directions along the axial direction of the pusher (5); The hoisting assembly includes a transmission worm (8) rotatably disposed in an adjustment box (6) and a hoisting component (9) slidably disposed on the adjustment box (6); a transmission worm wheel (10) is provided outside the transmission worm (8); a transmission component (11) is provided between the hoisting component (9) and the transmission worm wheel (10); the transmission worm (8) rotates under the action of external force, so that the transmission worm wheel (10) rotates and drives the transmission component (11) to rotate, thereby causing the hoisting component (9) to move up or down.

2. The steam turbine generator maintenance and inspection lifting tool according to claim 1, characterized in that: The support frame (1) is provided with sliding rollers (12); the guide (4) includes a guide rod (401) provided on the support frame (1).

3. The steam turbine generator maintenance and inspection lifting tool according to claim 2, characterized in that: The driving component (3) includes a drive screw (301) rotatably mounted on the support frame (1) and a drive motor (302) connected to the drive screw (301); the drive screw (301) is parallel to the guide rod (401) on opposite planes.

4. The steam turbine generator maintenance and inspection lifting tool according to claim 3, characterized in that: The support frame (2) is provided with a drive plate (18); the drive plate (18) is provided with a drive screw (301) sleeve; the drive screw (301) sleeve is threadedly connected to the screw.

5. The steam turbine generator maintenance and inspection lifting tool according to claim 4, characterized in that: The pusher (5) includes a push screw (501) rotatably disposed in the support frame (2) and a push motor (502) connected to the push screw (501); the push screw (501) is provided with a push screw (501) sleeve by thread; the adjustment box (6) is fixedly connected to the push screw (501) sleeve.

6. The steam turbine generator maintenance and inspection lifting tool according to claim 5, characterized in that: The guide (7) includes a guide rod disposed in the support frame (2); the guide rod is located on both sides of the push screw (501); the adjustment box (6) is slidably connected to the guide rod.

7. The steam turbine generator maintenance and inspection lifting tool according to claim 6, characterized in that: The lifting component (9) includes a lifting toothed plate (901) slidably disposed on the adjusting box (6) and a hook (902) disposed on the lifting toothed plate (901); a limiting plate (23) is provided on the lifting toothed plate (901); the transmission component (11) includes a transmission gear (1101) connected to the transmission worm gear (10); the transmission gear (1101) meshes with the lifting toothed plate (901).

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