A special ladder for generator stator maintenance platform

Abstract

The utility model discloses a special climbing ladder for a generator stator maintenance platform, which effectively achieves the purpose of facilitating the maintenance of the generator stator, comprising a walking platform and a descending ladder, the descending ladder being located at the front side of the walking platform, a plurality of detachable guardrails being arranged on the upper side of the walking platform, two rotatable sliding sleeves being arranged on the front side of the walking platform, a control panel which can move forward and backward being arranged on the lower side of the walking platform, two connecting rods being arranged on the front side of the control panel, a first rotating plate being arranged on the front side of the connecting rod, a first fixing frame being arranged on the lower side of the rear part of the walking platform, and a second fixing frame being arranged on the front side of the first fixing frame. The utility model has a novel structure, an ingenious conception, and is simple and convenient to operate, effectively increasing the safety of the device, facilitating the adjustment of the angle of the descending ladder, increasing the stability of the device, reducing the risk of staff members slipping off, and increasing the applicability of the device to different generator stator platforms.

Description

Technical Field

[0001] The utility model belongs to the technical field of maintenance equipment for generator sets in hydropower stations and relates to a special ladder for a generator stator maintenance platform. Background Art

[0002] There are generally two ways to get to the stator maintenance platform when overhauling the generator at Shahe Power Station, both of which have different degrees of safety hazards. One is to enter through the manhole below the stator. This hole is located below the wind tunnel foot grille and has a relatively narrow aperture. It is difficult for maintenance personnel with larger bodies to move when entering. There is no extra support space. After passing through the manhole, the unit spray lower ring pipe is installed on the ground under the stator. The body presses on the ring pipe, which has an adverse effect on the life of the ring pipe and the spray head. The other way to enter is to cross the upper busbar of the stator and go down to the maintenance platform through the ladder set up in advance in the maintenance platform. This way of entry has the safety hazard of maintenance personnel falling from a height due to the high height of the stator. In addition, the ladder has no fixed point and is easy to scratch the stator wire rods and slot wedges, damaging the surface insulation layer and accelerating the aging of the equipment.

[0003] Therefore, a special ladder for the generator stator maintenance platform is needed to facilitate the staff to carry out various inspections and test items on the generator stator. Utility Model Content

[0004] In view of the above problems, the utility model proposes a special ladder for a generator stator maintenance platform, which well solves the problems in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] The descent ladder is located at the front side of the walking platform, and a plurality of detachable guardrails are provided on the upper side of the walking platform. Two rotatable sliding sleeves are provided on the front side of the walking platform, and each sliding sleeve is slidably connected to the descending ladder. A control panel that can move forward and backward is provided on the lower side of the walking platform, and two connecting rods are fixedly connected to the front side of the control panel, and the front side of each connecting rod is rotatably connected to a first rotating plate, and the front side of each first rotating plate abuts against the sliding sleeve, and a first fixed frame is fixedly connected to the lower side of the rear part of the walking platform, and a second fixed frame that can move forward and backward is provided on the front side of the first fixed frame, and the first fixed frame and the second fixed frame cooperate with each other to form a structure in which the walking platform is fixed.

[0007] Preferably, the descending ladder includes two longitudinal rods, each of the sliding sleeves is slidably connected to the corresponding longitudinal rod, the two longitudinal rods are provided with a plurality of transverse rods, the longitudinal rods and the transverse rods are arranged in a trapezoidal shape that is narrow at the top and wide at the bottom, the lower side of each longitudinal rod is rotatably connected to a second rotating plate, and the lower side of each second rotating plate is provided with a detachable anti-slip pad.

[0008] Preferably, each of the sliding sleeves is fixedly connected to an L-shaped rod on one side away from the longitudinal rod, a sliding rod is fixedly connected to the left side of the L-shaped rod located on the right side of the walking platform, the sliding rod is plugged into the walking platform, and a rotating block is fixedly connected to the right side of the L-shaped rod located on the left side of the walking platform, and the rotating block is rotatably connected to the walking platform.

[0009] Preferably, an operating handle is rotatably connected to the lower side of the walking platform, a first bevel gear is fixedly connected to the left side of the operating handle, a second bevel gear is meshed on the front side of the first bevel gear, a threaded rod is fixedly connected to the front side of the second bevel gear, and the middle part of the threaded rod is threadedly connected to the control panel.

[0010] Preferably, a sliding groove is provided on each of the left and right sides of the walking platform, a sliding block is fixedly connected to each of the left and right sides of the second fixed frame, each sliding block is slidably connected to the corresponding sliding groove, a plurality of fixing holes are provided in the middle of the first fixed frame and the second fixed frame, and the front side surface of the first fixed frame and the rear side surface of the second fixed frame are both arc-shaped.

[0011] Preferably, a fixing groove is provided on the walking platform at a position corresponding to each guardrail, the upper surface of the walking platform is provided with a first anti-slip surface, and the outer surface of each of the transverse rods is provided with a second anti-slip surface.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The utility model has a detachable guardrail and a descending ladder that can be rotated to the upper side of the walking platform, which can make the device more convenient to transport and reduce the volume occupied by the device during transportation.

[0014] 2. The utility model has a first rotating plate that can limit the rotation angle of the sliding sleeve, thereby reducing the probability of damage to the generator stator platform during the installation of the device.

[0015] 3. The utility model has a second fixing frame that can slide back and forth relative to the first fixing frame, and the front side surface of the first fixing frame and the rear side surface of the second fixing frame are both arc-shaped, which can make the first fixing frame and the second fixing frame more closely fit the inner and outer side walls of the generator stator base, making the device more stably fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the explosion structure of the utility model.

[0018] Figure 3 This is a schematic diagram of the position of the first bevel gear in the utility model.

[0019] Figure 4 Practical Figure 2 A partial enlarged schematic diagram of area A in the middle.

[0020] In the figure: 1. walking platform; 2. descending ladder; 3. guardrail; 4. sliding sleeve; 5. control panel; 6. connecting rod; 7. first rotating plate; 8. first fixed frame; 9. second fixed frame; 10. longitudinal rod; 11. transverse rod; 12. second rotating plate; 13. anti-slip pad; 14. L-shaped rod; 15. sliding rod; 16. rotating block; 17. operating handle; 18. first bevel gear; 19. second bevel gear; 20. threaded rod; 21. sliding groove; 22. sliding block; 23. fixing hole; 24. fixing groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The following is combined with Figure 1-Figure 4 The specific implementation modes of the present utility model are further described in detail.

[0023] Depend on Figure 1-Figure 4The utility model comprises a walking platform 1 and a descending ladder 2. In order to facilitate the maintenance of the generator stator, the descending ladder 2 is located at the front side of the walking platform 1. A plurality of detachable guardrails 3 are arranged on the upper side of the walking platform 1. Two rotatable sliding sleeves 4 are arranged on the front side of the walking platform 1. Each sliding sleeve 4 is slidably connected to the descending ladder 2. A control panel 5 which can move forward and backward is arranged on the lower side of the walking platform 1. Two connecting rods 6 are fixedly connected to the front side of the control panel 5. Each connecting rod 6 is slidably connected to the walking platform 1 front and back. A first rotating plate 7 is rotatably connected to the front side of each connecting rod 6. The front side of each first rotating plate 7 abuts against the sliding sleeve 4. A first fixed frame 8 is fixedly connected to the lower side of the rear portion of the walking platform 1. A second fixed frame 9 which can move forward and backward is arranged on the front side of the first fixed frame 8. The first fixed frame 8 and the second fixed frame 9 cooperate with each other to form a fixed structure of the walking platform 1.

[0024] When in use, the device is first in a transport state, at which time each guardrail 3 is not connected to the walking platform 1, and the descending ladder 2 is located on the upper side of the walking platform 1. During installation, the device can be clamped on the generator stator base through the first fixing frame 8 and the second fixing frame 9, and fixed by bolts, and then the control panel 5 can be adjusted to drive the connecting rod 6 to move forward, and then the downward rotation angle of the sliding sleeve 4 can be limited by the first rotating plate 7. At this time, the descending ladder 2 can be pushed forward. As the descending ladder 2 continues to extend toward the front side of the walking platform 1, it will rotate downward under the action of gravity. At this time, the first rotating plate 7 will limit the rotation angle of the descending ladder 2 by abutting against the sliding sleeve 4, reducing the probability of damage to the generator stator platform during the installation of the device. When the descending ladder 2 is completely extended from the upper side of the walking platform 1, the control panel 5 can be moved backward, so that the sliding sleeve 4 can continue to rotate downward with the descending ladder 2, so that the bottom of the descending ladder 2 contacts the generator stator platform, and then each guardrail 3 is fixed to the upper side of the walking platform 1 in turn, and the installation of the device is completed.

[0025] Furthermore, in order to increase the safety of the device, the descending ladder 2 includes two longitudinal rods 10, each of the sliding sleeves 4 is slidably connected to the corresponding longitudinal rod 10, and the two longitudinal rods 10 are provided with a plurality of transverse rods 11. The longitudinal rods 10 and the transverse rods 11 are arranged in a trapezoidal shape that is narrow at the top and wide at the bottom. The trapezoidal design can make the descending ladder 2 more stable, and the lower side of each of the longitudinal rods 10 is rotatably connected to a second rotating plate 12, and the lower side of each second rotating plate 12 is provided with a detachable anti-slip pad 13. Through the second rotating plate 12 and the anti-slip pad 13, the device can be adapted to the use of generator stator platforms of different heights, and the friction at the bottom of the descending ladder 2 can be increased, thereby increasing the stability of the device.

[0026] Furthermore, each of the sliding sleeves 4 is fixedly connected to an L-shaped rod 14 on one side away from the longitudinal rod 10, a sliding rod 15 is fixedly connected to the left side of the L-shaped rod 14 located on the right side of the walking platform 1, and the sliding rod 15 is plugged into the walking platform 1, and a rotating block 16 is fixedly connected to the right side of the L-shaped rod 14 located on the left side of the walking platform 1, and the rotating block 16 is rotatably connected to the walking platform 1;

[0027] When in use, during the sliding of the descending ladder 2 relative to the walking platform 1, the L-shaped rod 14 located on the left side of the walking platform 1 is rotatably connected to the walking platform 1. Since the descending ladder 2 is trapezoidal, the L-shaped rod 14 located on the right side of the walking platform 1 will move left and right relative to the walking platform 1, thereby driving the corresponding sliding sleeve 4 to move left and right.

[0028] Further, in order to facilitate the adjustment of the angle of the descending ladder 2, an operating handle 17 is rotatably connected to the lower side of the walking platform 1, a first bevel gear 18 is fixedly connected to the left side of the operating handle 17, a second bevel gear 19 is meshed with the front side of the first bevel gear 18, a threaded rod 20 is fixedly connected to the front side of the second bevel gear 19, the threaded rod 20 is rotatably connected to the walking platform 1, and the middle part of the threaded rod 20 is threadedly connected to the control panel 5;

[0029] When in use, by rotating the operating handle 17 , the threaded rod 20 is driven to rotate under the action of the first bevel gear 18 and the second bevel gear 19 , thereby adjusting the front and rear position of the control panel 5 .

[0030] Further, in order to make the device more stable after being fixed, a sliding groove 21 is respectively provided on the left and right sides of the walking platform 1, and a sliding block 22 is fixedly connected to the left and right sides of the second fixing frame 9, and each sliding block 22 is slidably connected to the corresponding sliding groove 21. A plurality of fixing holes 23 are provided in the middle of the first fixing frame 8 and the second fixing frame 9, and the front side surface of the first fixing frame 8 and the rear side surface of the second fixing frame 9 are both arc-shaped (not shown in the figure);

[0031] When in use, the first fixing frame 8 and the second fixing frame 9 can be fixed to the generator stator base in sequence by bolts through the fixing holes 23. At this time, the side wall of the generator stator base is between the first fixing frame 8 and the second fixing frame 9. The first fixing frame 8 and the second fixing frame 9 can clamp and fix the side wall of the generator stator base. The mutual cooperation between the sliding block 22 and the sliding groove 21 can make the device adapt to different generator stator bases. The front side surface of the first fixing frame 8 and the rear side surface of the second fixing frame 9 are designed to be arc-shaped, so that the first fixing frame 8 and the second fixing frame 9 can be more closely fitted to the inner and outer side walls of the generator stator base, making the device more stably fixed.

[0032] Furthermore, in order to reduce the risk of workers slipping, a fixing groove 24 is provided on the walking platform 1 at a position corresponding to each guardrail 3, and each guardrail 3 can be plugged into the walking platform 1 through the fixing groove 24. Furthermore, the connection between the guardrail 3 and the fixing groove 24 can be made more stable by bolts. The upper surface of the walking platform 1 is provided with a first anti-slip surface, and the outer surface of each of the transverse rods 11 is provided with a second anti-slip surface;

[0033] It should be further explained that, through the detachable design of the guardrail 3 and the design that the descending ladder 2 can be rotated to the upper side of the walking platform 1, it is possible to facilitate the transportation of the device and reduce the volume occupied by the device during transportation.

[0034] When the utility model is used, the device is first in a transport state. At this time, each guardrail 3 is not connected to the walking platform 1, and the descending ladder 2 is located on the upper side of the walking platform 1. During installation, the device can be clamped on the generator stator base through the first fixing frame 8 and the second fixing frame 9, and fixed by bolts, and then the control panel 5 can be adjusted to drive the connecting rod 6 to move forward, and then the downward rotation angle of the sliding sleeve 4 can be limited by the first rotating plate 7. At this time, the descending ladder 2 can be pushed forward. As the descending ladder 2 continues to extend toward the front side of the walking platform 1, it will rotate downward under the action of gravity. At this time, the first rotating plate 7 will limit the rotation angle of the descending ladder 2 by abutting against the sliding sleeve 4, reducing the probability of damage to the generator stator platform during the installation of the device. When the descending ladder 2 is completely extended from the upper side of the walking platform 1, the control panel 5 can be moved backward, so that the sliding sleeve 4 can continue to rotate downward with the descending ladder 2, so that the bottom of the descending ladder 2 is in contact with the generator stator platform, and then each guardrail 3 is fixed to the upper side of the walking platform 1 in turn, and the installation of the device is completed.

[0035] The utility model has a novel structure, ingenious conception, and simple and convenient operation. Through this design, the purpose of facilitating the maintenance of the generator stator is effectively achieved, the safety of the device is increased, the angle of the descending ladder 2 is conveniently adjusted, the stability of the device is increased, the risk of workers slipping is reduced, and the applicability of the device to different generator stator platforms is increased.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A special ladder for a generator stator maintenance platform, comprising a walking platform and a descending ladder, characterized in that: The descending ladder is located at the front side of the walking platform, and a plurality of detachable guardrails are provided on the upper side of the walking platform. Two rotatable sliding sleeves are provided on the front side of the walking platform, and each sliding sleeve is slidably connected to the descending ladder. A control plate that can move forward and backward is provided on the lower side of the walking platform, and two connecting rods are fixedly connected to the front side of the control plate, and a first rotating plate is rotatably connected to the front side of each connecting rod, and the front side of each first rotating plate is abutted against the sliding sleeve, and a first fixed frame is fixedly connected to the lower side of the rear part of the walking platform, and a second fixed frame that can move forward and backward is provided on the front side of the first fixed frame, and the first fixed frame and the second fixed frame cooperate with each other to form a structure in which the walking platform is fixed.

2. A special ladder for generator stator maintenance platform according to claim 1, characterized in that: The descending ladder includes two longitudinal rods, each of the sliding sleeves is slidably connected to the corresponding longitudinal rod, the two longitudinal rods are provided with a plurality of transverse rods, the longitudinal rods and the transverse rods are arranged in a trapezoidal shape with narrow upper part and wide lower part, the lower side of each longitudinal rod is rotatably connected to a second rotating plate, and the lower side of each second rotating plate is provided with a detachable anti-slip pad.

3. A special ladder for generator stator maintenance platform according to claim 2, characterized in that: Each sliding sleeve is fixedly connected to an L-shaped rod on one side away from the longitudinal rod, a sliding rod is fixedly connected to the left side of the L-shaped rod located on the right side of the walking platform, the sliding rod is plugged into the walking platform, and a rotating block is fixedly connected to the right side of the L-shaped rod located on the left side of the walking platform, and the rotating block is rotatably connected to the walking platform.

4. The special ladder for generator stator maintenance platform according to claim 1, characterized in that: The lower side of the walking platform is rotatably connected to an operating handle, the left side of the operating handle is fixedly connected to a first bevel gear, the front side of the first bevel gear is meshed with a second bevel gear, the front side of the second bevel gear is fixedly connected to a threaded rod, and the middle part of the threaded rod is threadedly connected to the control panel.

5. The special ladder for generator stator maintenance platform according to claim 1, characterized in that: A sliding groove is provided on each of the left and right sides of the walking platform, a sliding block is fixedly connected to each of the left and right sides of the second fixed frame, each sliding block is slidably connected to the corresponding sliding groove, a plurality of fixing holes are provided in the middle of the first fixed frame and the second fixed frame, and the front side surface of the first fixed frame and the rear side surface of the second fixed frame are both arc-shaped.

6. The special ladder for generator stator maintenance platform according to claim 2, characterized in that: A fixing groove is provided on the walking platform at a position corresponding to each guardrail, a first anti-slip surface is provided on the upper surface of the walking platform, and a second anti-slip surface is provided on the outer surface of each transverse rod.

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