Large-scale water-turbine generator set stator maintenance platform

Abstract

The utility model relates to a modularized platform for overhauling a stator of a large-scale water-turbine generator set, the platform is composed of a plurality of arc-shaped support modules which are detachably connected, vertical rods are arranged on the inner side and the outer side of each support module, and the vertical rods are reinforced through horizontal connecting rods to form a stable frame structure. The pedal is made of an anti-skid, wear-resistant and corrosion-resistant material, so that safe walking in a wet environment is ensured; guardrails and safety nets are arranged on the edges, so that articles or personnel are prevented from falling. The stair module is also in an arc-shaped design and is connected with the support module to form a complete channel system. The special connector realizes quick splicing and disassembly, comprises a fixed semi-ring, a movable semi-ring, a fastener and a buffer block, and ensures firm connection and convenient assembly. According to the utility model, not only is the time cost for building and dismantling a traditional scaffold reduced, but also the efficiency of maintenance work is improved, and meanwhile, the safety of workers is guaranteed. The modular design supports reutilization, and the overall maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hydropower station generator set maintenance, especially to a large -scale hydro -generator set stator overhaul platform. BACKGROUND

[0002] In modern hydropower stations, the hydro-generator set is the core equipment for converting water energy into electric energy. With the growth of China's power demand and the progress of technology, the installed capacity of large hydro-generator sets is increasing, and the single machine capacity is also increasing. For example, Ahai hydropower station has a total installed capacity of 2000MW, and has 5 hydro-generator sets with a single machine capacity of 400MW, which makes them one of the important power sources of the Jinsha River hydropower base. However, with the increase of the size and capacity of the unit, higher requirements are put forward for the overhaul of these key equipment.

[0003] Traditionally, when overhauling and cleaning the generator stator, two methods are usually used: one is to set up a scaffold around the inside of the stator; the other is to frequently move the extension ladder. Both methods have obvious shortcomings:

[0004] Scaffold erection method: This traditional maintenance method requires a lot of time and manpower to set up and remove the scaffold, not only low work efficiency, but also because of the complexity of the scaffold setting and removal process, it increases the risk of safety accidents. In addition, the construction of the scaffold will occupy valuable maintenance time and may affect other parallel maintenance work.

[0005] Use extension ladder: although the extension ladder is convenient to carry, but in the actual application, there is a problem of poor stability, especially when working at a high place, it is easy to cause personnel to slip or fall, at the same time, the extension ladder can only provide limited working height, for large hydro-generator set, it can not meet the needs of comprehensive overhaul.

[0006] In order to overcome the problems existing in the above traditional maintenance method, improve the maintenance efficiency and ensure the safety of workers, a new solution is urgently needed. INVENTION CONTENTS

[0007] Therefore, the utility model provides a large -scale hydro -generator set stator overhaul platform, its structure design aims at optimizing the working efficiency and safety in the maintenance process. It includes several detachable support modules, the support module is designed in arc shape to fit the cylindrical stator or rotor, the inner and outer sides of the support module are respectively provided with several inner ring vertical rods and outer ring vertical rods, the inner ring vertical rods and the outer ring vertical rods are connected by horizontal connecting rods, the support module is provided with one or more working tables in the vertical direction, the working table includes a pedal and a horizontal connecting rod installed below the pedal, and the bottom of the support module is provided with supporting feet.

[0008] Further description of the foregoing scheme further comprises a staircase module, the staircase module is also arc-shaped design, the staircase module is internally and externally provided with a plurality of inner ring vertical rods and outer ring vertical rods, and one or more staircases are fixed between the inner ring vertical rods and the outer ring vertical rods.

[0009] Further, the support module and the staircase module are connected with each other to form a ring-shaped maintenance platform, and other arc-shaped maintenance platforms can also be formed.

[0010] Optionally, in order to quickly disassemble and splice the support modules, the vertical rods between the support modules are connected through connectors. The connector comprises two fixed half-rings, two movable half-rings, a fastener and a connecting buffer block. The connecting buffer block reversely connects the two fixed half-rings. One end of the movable half-ring is rotatably connected to one end of the fixed half-ring through a rotating shaft, and the other end of the movable half-ring is connected to the other end of the fixed half-ring through the fastener.

[0011] Optionally, vertical guard plates are arranged above the inner side or the outer side edges of the steps to prevent parts and tools from falling.

[0012] More preferably, the bottom of the support module is further provided with retractable universal rollers. The rollers are sleeved on the bottom of the vertical rod through a telescopic rod, and a latch is arranged between the telescopic rod and the vertical rod to adjust the position of the roller.

[0013] More preferably, safety nets are arranged on the plurality of inner ring vertical rods or outer ring vertical rods to protect the entire non-working surface and prevent articles or workers from falling.

[0014] Optionally, a detachable support rod is further arranged on the vertical rod of the single support module, so that the single support module can also be used.

[0015] Optionally, the support module is provided with six blocks, and the workbench of the support module is provided with three layers; the staircase module is provided with two blocks, and the staircase of the staircase module is provided with three layers, and the height of each layer is greater than 1800mm to meet the maintenance of most rotors.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The maintenance platform adopts modular design and can be quickly built and disassembled, greatly shortening the preparation time and recovery time, so that the maintenance work can be quickly carried out and completed.

[0018] The platform is divided into three or more layers, allowing maintenance personnel to work on the upper, middle and lower parts of the generator stator simultaneously without affecting each other, fully utilizing the vertical space and greatly improving the maintenance efficiency.

[0019] The maintenance platform is provided with a solid fence, a kick plate and a safety net, effectively preventing tools or materials from falling or workers from falling, and protecting the safety of ground workers.

[0020] The built-in stair module provides a safe and convenient access channel, avoids the use of unstable ladders, and reduces the possibility of slipping or falling injuries.

[0021] The manpower and time cost required for the construction and disassembly of traditional scaffolds is reduced, and the overall maintenance cost is reduced.

[0022] In summary, the large-scale hydro-generator set stator maintenance platform of the present utility model not only solves many problems in the maintenance of large-capacity hydro-generator stators, but also brings higher efficiency, better safety and lower cost to the maintenance of hydroelectric station units. This innovative solution reflects the progress of modern industrial technology and is of great significance to the sustainable development of the hydropower industry. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0024] Figure 1 The overall schematic diagram provided for the embodiments of the present utility model;

[0025] Figure 2 , 3 The support module structure schematic diagram provided for the embodiments of the present utility model;

[0026] Figure 4 The stair module structure schematic diagram provided for the embodiments of the present utility model;

[0027] Figure 5 The vertical rod connection schematic diagram between the support modules provided for the embodiments of the present utility model;

[0028] Figure 6 The connector structure schematic diagram provided for the embodiments of the present utility model;

[0029] Figure 7 The roller-equipped support module structure schematic diagram provided for the embodiments of the present utility model;

[0030] Figure 8 The local A enlarged view provided for the embodiments of the present utility model;

[0031] Figure 9 , 10 The use schematic diagram provided for the embodiments of the present utility model.

[0032] In the drawings, various reference signs are used.

[0033] 1, support module; 11, inner ring vertical pole; 12, outer ring vertical pole; 13, horizontal connecting rod; 14, pedal; 15, guard plate; 16, guardrail; 17, supporting foot; 18, roller; 181, brake switch; 182, telescopic rod; 183, bolt; 19, connector; 191, connecting buffer block; 192, fixed half ring; 193, movable half ring; 194, nut; 2, stator; 3, stair module; 31, stair; 4, supporting rod.

[0034] The specific embodiments of the present application have been shown in the above drawings, and will be described in more detail hereinafter. These drawings and the written description are not intended to restrict the scope of the present application concept in any way, but to illustrate the present application concept by referring to specific embodiments. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0036] In order to make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail with reference to the drawings.

[0037] Please refer to Figures 1-10As shown, the embodiment discloses a large hydro-generator set stator maintenance platform, which comprises a plurality of detachably connected support modules 1, the support modules 1 are arc-shaped designed to fit the cylindrical stator 2 or rotor, the inner and outer sides of the support modules 1 are respectively provided with a plurality of inner ring vertical rods 11 and outer ring vertical rods 12, the inner ring vertical rods 11 and the outer ring vertical rods 12 are welded and fixed through horizontal connecting rods 13, the inner ring vertical rods 11, the outer ring vertical rods 12 and the horizontal connecting rods 13 adopt high-quality Q235 carbon steel pipes with a diameter of 50 mm and a wall thickness of 5 mm. The support modules 1 are provided with three layers of workbenches in the vertical direction, in other embodiments, other layers of workbenches can be provided, and the topmost workbench is also provided with a guardrail 16. The workbench comprises a footboard 14 and a horizontal connecting rod 13 installed below the footboard 14, and the bottom of the support module 1 is provided with a supporting leg 17. The footboard 14 is welded on the horizontal connecting rod 13, and the footboard 14 adopts an anti-skid, wear-resistant and corrosion-resistant flat-bean pattern steel plate, which can ensure good walking conditions even in a humid environment and reduce the risk of injury caused by slipping. The design of the maintenance platform uniformly distributes a load of more than 270 kg / m2, has the characteristics of good anti-skid, wear-resistant, corrosion-resistant and strong load-bearing capacity, and is convenient for erection, removal, hoisting and storage.

[0038] As shown, Figure 1 The support module 1 is connected with the stair module 3, the stair module 3 is also arc-shaped designed, the inner and outer sides of the stair module 3 are respectively provided with a plurality of inner ring vertical rods 11 and outer ring vertical rods 12, and three layers of stairs 31 are fixed between the inner ring vertical rods 11 and the outer ring vertical rods 12. In the embodiment, two stair modules 3 are provided for the convenience of workers to go up and down. The support module 1 and the stair module 3 are connected with each other to form a ring-shaped maintenance platform, as shown, Figure 10 which is installed on the inner side of the stator 2, and other arc-shaped maintenance platforms can also be formed, which can be used to maintain the outer side of the stator 2 or the inner and outer sides of the rotor. In the embodiment, six support modules 1 are provided, and the workbenches of the support modules 1 are provided with three layers; two stair modules 3 are provided, and the stairs 31 of the stair modules 3 are provided with three layers, and each layer is provided with a height of more than 1800 mm to meet the current rotor maintenance and enable the operators to work in a natural standing or slightly bent condition, thereby reducing the labor intensity and improving the comfort of long-time operation.

[0039] In the embodiment, in order to quickly splice and disassemble the support modules 1, the vertical rods between the support modules 1 are connected through connectors 19. As shown, Figure 5 , 6As shown, the connector 19 includes two fixed half rings 192, two movable half rings 193, fasteners, and a connecting buffer block 191, the connecting buffer block 191 reversely and fixedly connects the two fixed half rings 192, one end of the movable half ring 193 is rotatably connected with one end of the fixed half ring 192 through a rotating shaft, and the other end of the movable half ring 193 is connected with the other end of the fixed half ring 192 through a fastener, and the fastener adopts a nut 194 here. A vertical guard plate 15 is arranged above the inner side or the outer side edge of the pedal 14 to prevent parts and tools from falling.

[0040] In the embodiment, as shown in Figure 7 、 8 The bottom of the support module 1 is also provided with retractable universal rollers 18, the rollers 18 are sleeved on the bottom of the vertical rod through telescopic rods 182, and the telescopic rods 182 and the vertical rod are also provided with a latch 183 to adjust the position of the rollers 18, and the rollers 18 are also provided with brake switches 181. The maintenance platform is equipped with a solid fence and a kick plate, and a safety net, which effectively prevents tools or materials from falling or workers from falling, and protects the safety of ground workers.

[0041] In some embodiments, as shown in Figure 9 A detachable support rod 4 is also arranged on the vertical rod of the single support module 1, so that the single support module 1 can also be used.

[0042] In order to understand the disclosure of the utility model more thoroughly and comprehensively, the principle will be further explained in combination with the use mode.

[0043] When the stator 2 of the large hydro-generator set needs to be overhauled, the workers will first transport each support module 1 from the storage site to the work site. Due to the modular design, these support modules 1 can be easily transported by vehicles, and after arriving at the site, they can be quickly assembled into a complete annular or specific arc-shaped maintenance platform. The retractable universal rollers 18 arranged at the bottom of each support module 1 enable them to move flexibly in a narrow space until the optimal position is found, and then the rollers 18 are raised by adjusting the latch 183 to make the rollers 18 off the ground, ensuring the stability of the platform.

[0044] Once all the support modules 1 are in place, the next step is to connect the end vertical rods between the modules. Here, a specially designed connector 19 is used, which is composed of a fixed half ring 192, a movable half ring 193, a fastener, and a connecting buffer block 191. This design allows workers to quickly connect the vertical rods together, while ensuring that the connection points are strong enough and that there is some buffering between the support modules 1 to reduce friction. After the connection is completed, the entire maintenance platform forms a closed working environment, and the inner ring is provided with a safety net, providing necessary safety protection for high-altitude work.

[0045] For personnel up and down, the staircase module 3 plays a key role. The staircase module 3, also designed in an arc shape, matches the support module 1, and the vertical rods set on the inside and outside reinforce the staircase 31 structure, while the staircase 31 above the first floor provides multiple passages, making it convenient for traffic between workbenches of different levels. The built-in staircase 31 is more stable and reliable than traditional ladders, reducing the risk of slipping or falling.

[0046] The anti-skid, wear-resistant, and corrosion-resistant flat-bean pattern steel plate tread 14 laid on the workbench not only improves the safety of walking, but also prolongs the service life of the material.

[0047] In practical applications, this maintenance platform can significantly reduce the time and labor cost required for traditional scaffold erection and dismantling. In addition, the modular design means that the platform can be reused according to different generator models and maintenance needs, further reducing the long-term maintenance cost. The application of high-quality welding technology and durable materials increases the overall service life of the platform, and the use of the platform during regular maintenance can also allow for more detailed inspection and maintenance of the stator 2, which helps to identify potential problems in a timely manner and take preventive measures, thereby extending the service life of the generator set.

[0048] Overall, the design of this large hydro-generator set stator 2 maintenance platform fully embodies the progress of modern industrial technology, not only improving the efficiency and safety of maintenance work, but also having economic cost-effectiveness and environmental sustainability. This innovative solution is of great significance for promoting the sustainable development of the hydropower industry.

[0049] Those skilled in the art, having considered the specification and practiced the present application, will readily conceive other embodiments of the present application. The present application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or conventional technical means in the art that are not disclosed by the present application. The specification and examples are only considered as exemplary, and the true scope and spirit of the present application are indicated by the above claims.

[0050] It should be understood that the present application is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A stator maintenance platform for a large hydro-generator set, characterized in that: The system includes several detachable support modules (1), each with an arc-shaped design. Each support module (1) has several inner ring vertical rods (11) and outer ring vertical rods (12) on its inner and outer sides. The inner ring vertical rods (11) and outer ring vertical rods (12) are connected by a horizontal connecting rod (13). The support module (1) has one or more workbenches in the vertical direction. Each workbench includes a pedal (14) and a horizontal connecting rod (13) installed below the pedal (14). The support module (1) has a support foot (17) at its bottom.

2. The stator maintenance platform for a large hydro-generator unit according to claim 1, characterized in that: It also includes a stair module (3), which is arc-shaped. The stair module (3) has several inner ring vertical bars (11) and outer ring vertical bars (12) on its inner and outer sides respectively. A staircase (31) with one or more floors is fixed between the inner ring vertical bars (11) and the outer ring vertical bars (12).

3. The stator maintenance platform for a large hydro-generator unit according to claim 2, characterized in that: The support module (1) and the stair module (3) are interconnected to form a ring-shaped maintenance platform.

4. The stator maintenance platform for a large hydro-generator unit according to claim 1, characterized in that: The vertical rods between the bracket modules (1) are connected by a connector (19). The connector (19) includes two fixed half-rings (192), two movable half-rings (193), fasteners, and a connecting buffer block (191). The connecting buffer block (191) fixes the two fixed half-rings (192) in opposite directions. One end of the movable half-ring (193) is rotatably connected to one end of the fixed half-ring (192) through a rotating shaft. The other end of the movable half-ring (193) is connected to the other end of the fixed half-ring (192) through a fastener.

5. The stator maintenance platform for a large hydro-generator unit according to claim 1, characterized in that: A vertical guard plate (15) is provided above the inner or outer edge of the pedal (14).

6. The stator maintenance platform for a large hydro-generator unit according to claim 1, characterized in that: The bottom of the support module (1) is also provided with a retractable universal roller (18). The roller (18) is sleeved on the bottom of the vertical rod through a telescopic rod (182). A pin (183) is also provided between the telescopic rod (182) and the vertical rod to adjust the position of the roller (18).

7. The stator maintenance platform for a large hydro-generator unit according to claim 1, characterized in that: Safety nets are laid on several inner ring vertical bars (11) or outer ring vertical bars (12).

8. The stator maintenance platform for a large hydro-generator unit according to claim 1, characterized in that: Each support module (1) also has a detachable support rod (4) on its vertical rod.

9. A stator maintenance platform for a large hydro-generator unit according to claim 3, characterized in that: The support module (1) has 6 blocks, and the workbench of the support module (1) has 3 layers; the stair module (3) has 2 blocks, and the staircase (31) of the stair module (3) has 3 layers, with each layer having a height of 1800mm or more.

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