Module ladder for ascending and descending water turbine generator rotor and using method

Abstract

The invention relates to the technical field of module ladders of generator rotors, and particularly discloses a module ladder for ascending and descending a water turbine generator rotor and a use method. The fixing element is located at the top end of the generator body; the overturning element is hinged to the fixing element; wherein the overturning element can be overturned into the fixing element without influencing the operation of the generator body, and the fixing element comprises a protective fence which is fixed on the generator body through an upper rack foundation bolt and an upper rack radial bolt. The fixing elements of the module ladder are directly fixed with the generator body through bolt structures such as upper rack foundation bolts and upper rack radial bolts without depending on large auxiliary equipment such as a bridge crane, so that the mounting process is simplified; according to the adjustable gap bridge guardrail, the pedal connecting pins and the buttresses are connected with the adjustable bolts to achieve flexible installation, the dismounting and mounting workload is greatly reduced, the overhaul preparation time is shortened, and the equipment dispatching cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of module ladder of generator rotor, and in particular to a module ladder of upper and lower water turbine generator rotor and a use method thereof. BACKGROUND

[0002] In the process of water turbine generator maintenance, when the upper frame of the generator is removed, the operating personnel need to use a special ladder to enter and exit the generator rotor for maintenance operation. However, the widely used integrated special ladder in the industry has many technical defects, which are as follows:

[0003] The integrated special ladder is heavy in structure and is not fixed by bolts. The installation process needs to rely on large equipment such as a bridge machine for auxiliary completion, which not only increases the equipment scheduling cost, but also significantly increases the workload of disassembly and assembly operation and prolongs the maintenance preparation time.

[0004] Due to the lack of stable bolt fixing structure, the ladder is prone to shaking or displacement during use, which brings potential risks to the safety of the operating personnel, especially in the high-altitude operation scene. Insufficient stability may cause safety accidents.

[0005] The integrated structure cannot realize extension, rotation and other actions. When the rotor needs to be lifted or dropped, the ladder must be repeatedly disassembled and assembled to avoid the rotor, which not only further increases the disassembly and assembly workload, but also increases the labor intensity and safety risk of the operating personnel due to frequent operation.

[0006] The heavy structure makes it extremely difficult to move and transport the ladder in the factory building, which needs the cooperation of multiple people or relies on additional equipment, reducing the overall efficiency of the maintenance operation. SUMMARY

[0007] Therefore, the technical problem to be solved by the present application is that the heavy structure makes it extremely difficult to move and transport the ladder in the factory building, which needs the cooperation of multiple people or relies on additional equipment, reducing the overall efficiency of the maintenance operation.

[0008] The above technical problems are solved by the following technical solutions: the present application provides a module ladder of upper and lower water turbine generator rotor, which comprises a generator body;

[0009] a fixing element located at the top end of the generator body; and

[0010] a turnover element hinged to the fixing element;

[0011] The turnover element can be turned over to the inside of the fixing element without affecting the operation of the generator body.

[0012] In a preferred mode of the module ladder of the upper and lower water turbine generator rotor of the present application: the fixed element comprises a protective fence fixed on the generator body through the upper bracket anchor bolt and the upper bracket radial bolt, and an adjustable overbridge fence is arranged between the protective fence and the turnover element.

[0013] In a preferred mode of the module ladder of the upper and lower water turbine generator rotor of the present application: the adjustable overbridge fence is installed through the tread plate connecting pin and the pier connecting adjustable bolt, and the protective fence is provided with a front end door for closing during the lifting and falling of the rotor.

[0014] In a preferred mode of the module ladder of the upper and lower water turbine generator rotor of the present application: the turnover element comprises a telescopic turnover ladder hinged at the end of the adjustable overbridge fence, and the telescopic turnover ladder is connected with the adjustable overbridge fence through the telescopic ladder installation pin.

[0015] In a preferred mode of the module ladder of the upper and lower water turbine generator rotor of the present application: the telescopic turnover ladder is connected with the rotor yoke through the magnetic yoke bolt and the magnetic yoke bolt fixing nut, and the bottom end of the adjustable overbridge fence is provided with a universal wheel.

[0016] In a preferred mode of the module ladder of the upper and lower water turbine generator rotor of the present application: the side wall of the telescopic turnover ladder is provided with a side fence, the side fences are symmetrically arranged with the central axis of the telescopic turnover ladder, and the side fences on both sides can be turned over.

[0017] In a preferred mode of the module ladder of the upper and lower water turbine generator rotor of the present application: the top end of the adjustable overbridge fence is provided with a fixed block, and the hinge between the telescopic turnover ladder and the fixed block is arranged in an "L" shape.

[0018] In a preferred mode of the module ladder of the upper and lower water turbine generator rotor of the present application: the end of the telescopic turnover ladder away from the adjustable overbridge fence is provided with a fixed plate, and the fixed plate is provided with a slot matched with the magnetic yoke bolt fixing nut.

[0019] In a preferred mode of the module ladder of the upper and lower water turbine generator rotor of the present application: the top end of the fixed plate is provided with a connecting plate, and the side wall of the connecting plate is connected with the telescopic turnover ladder.

[0020] In a preferred mode of the method for using the module ladder of the present application: after the upper bracket of the generator is removed, the protective fence is installed through the upper bracket anchor bolt and the upper bracket radial bolt; the adjustable overbridge fence is installed through the tread plate connecting pin and the pier connecting adjustable bolt, and the fence height is adjusted; the length of the telescopic turnover ladder is adjusted, and it is connected between the telescopic ladder installation pin and the magnetic yoke bolt, and the workers enter the rotor for maintenance by means of the module ladder.

[0021] The beneficial effects of the present application are that the fixed element of the module ladder is directly fixed with the generator body through bolt structures such as upper rack foot bolts and upper rack radial bolts, without relying on large auxiliary equipment such as bridge machines, thereby simplifying the installation process; at the same time, the adjustable overpass guardrail is flexibly installed through the pedal connecting pin and the adjustable bolt connected to the pier, thereby greatly reducing the disassembly and assembly workload, shortening the maintenance preparation time, and reducing the equipment scheduling cost. The fixed element adopts a multiple bolt fixing mode to ensure firm connection with the generator body; the telescopic turnover ladder of the turnover element is connected with the adjustable overpass guardrail through the telescopic ladder mounting pin, and is precisely connected with the rotor yoke through the magnetic yoke bolt and the magnetic yoke bolt fixing nut, and the slot on the fixed plate is matched with the nut to further enhance the connection stability, thereby effectively avoiding shaking or displacement of the ladder during use. In addition, the symmetrical arrangement and the turnover design of the side guardrail can provide reliable lateral protection during operation, thereby significantly reducing the safety risk of high-altitude operation. The turnover element is hinged with the fixed element, and the hinge is designed in an "L" shape, so that the telescopic turnover ladder can be directly turned over to be stored inside the fixed element, without disassembly, thereby avoiding the rotor lifting and falling path, completely solving the problem of repeated disassembly and assembly of the integrated structure, reducing the labor intensity of the operating personnel and the safety risk caused by frequent operation. At the same time, the length of the telescopic turnover ladder can be adjusted to adapt to different specifications of the rotor, thereby improving the universality of the equipment. The universal wheel design at the bottom end of the adjustable overpass guardrail enables the module ladder to be easily pushed by manpower in the storage state, thereby realizing overall movement and transfer, without the need for multiple people to cooperate or additional equipment assistance, thereby significantly improving the transfer convenience of the ladder in the factory building, thereby improving the overall efficiency of the maintenance operation. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, rather than limiting the present application. Among them:

[0023] Figure 1 A schematic diagram of the module ladder and the generator connection structure of the upper and lower water turbine generator rotor is shown;

[0024] Figure 2 For Figure 1 An enlarged structure schematic diagram of A in the middle;

[0025] Figure 3 A schematic diagram of the overall structure of the module ladder of the upper and lower water turbine generator rotor is shown;

[0026] Figure 4 A schematic diagram of the fixed plate and the magnetic yoke bolt fixing nut connection structure of the module ladder of the upper and lower water turbine generator rotor is shown;

[0027] Figure 5The extension and turnover structure of the module ladder of the upper and lower water turbine generator rotor is shown. DETAILED DESCRIPTION

[0028] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with specific embodiments and drawings.

[0029] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions about the present application, but the terms can be changed according to the intention of those skilled in the art, precedents, or new technology in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as simple names, but based on the meaning of the terms and the overall description of the present application.

[0030] REFERENCE Figures 1-2 The present embodiment provides a module ladder of an upper and lower water turbine generator rotor, comprising a turnover element 3 which can be turned over to the inside of a fixed element 2. By such a design, when the rotor needs to be hoisted, dropped back, or the generator body needs to be operated, the turnover element 3 can be prevented from interfering with the normal operation of the generator, thereby ensuring the safe and stable operation of the equipment. At the same time, the extension length of the turnover element 3 can be adapted to rotors of different specifications, thereby improving the versatility and applicability of the module ladder.

[0031] The generator body 1, as the installation basis and operation object carrier of the entire module ladder, is a core component of the water turbine generator, and provides necessary installation positions and operation environments for the setting of the module ladder;

[0032] The fixed element 2 is located at the top end of the generator body 1, and is a fixed support part of the module ladder, which is used to provide a stable transition platform and a safe protection basis for the operating personnel. It comprises a guardrail 21 which is firmly fixed on the generator body 1 through upper rack anchor bolts 22 and upper rack radial bolts 23, thereby ensuring the stability of the fixed element 2 as a whole. An adjustable bridge guardrail 24 is further provided between the guardrail 21 and the turnover element 3, which is installed through a pedal connecting pin 25 and a pier connecting adjustable bolt 26. During the installation process, the position and state thereof can be adjusted according to actual needs, and at the same time, the height of the fence can be adjusted to adapt to different operation scenes. In addition, the guardrail 21 is provided with a front end door which is used to be closed when the rotor is hoisted and dropped back, thereby playing a role of isolation and protection, and avoiding personnel from entering the dangerous area by mistake; and

[0033] The turnover element 3 is hinged with the fixed element 2, is a key part of connecting the fixed element 2 and the rotor, and can realize the passing of the operating personnel between the two. The turnover element 3 comprises a telescopic turnover ladder 31 hingedly arranged at the end of the adjustable bridge guardrail 24, the telescopic turnover ladder 31 is connected with the adjustable bridge guardrail 24 through a telescopic ladder mounting pin 32, and the telescopic turnover ladder 31 is connected with the rotor yoke through a magnetic yoke bolt 33 and a magnetic yoke bolt fixing nut 34, thereby ensuring the stability of the connection between the telescopic turnover ladder 31 and the rotor during operation. The bottom end of the adjustable bridge guardrail 24 is provided with a universal wheel 35, which facilitates the overall transfer of the module ladder. The side wall of the telescopic turnover ladder 31 is provided with a side guardrail 36, which is symmetrically arranged with the center axis of the telescopic turnover ladder 31, and the two side guardrails 36 can be turned over, unfolded to provide safety protection during operation, and turned over to reduce space occupation when stored. The top end of the adjustable bridge guardrail 24 is provided with a fixed block 37, and the hinge between the telescopic turnover ladder 31 and the fixed block 37 is arranged in an "L" shape. This design ensures that the turnover element 3 can be closely fitted with the fixed element 2 when stored, further reducing space occupation. In addition, the end of the telescopic turnover ladder 31 away from the adjustable bridge guardrail 24 is provided with a fixed plate 38, the fixed plate 38 is provided with a slot matched with the magnetic yoke bolt fixing nut 34, and is used to realize the precise connection between the telescopic turnover ladder 31 and the rotor yoke; the top end of the fixed plate 38 is provided with a connecting plate 39, the side wall of the connecting plate 39 is connected with the telescopic turnover ladder 31, and the stability of the connection between the fixed plate 38 and the telescopic turnover ladder 31 is enhanced.

[0034] The turnover element 3 can be turned over to the inside of the fixed element 2 without affecting the operation of the generator body 1.

[0035] Referring to Figures 2-4 As an optional embodiment, the fixed element 2 comprises a protective fence 21 which is firmly fixed on the generator body 1 through two special bolt structures, i.e. an upper rack anchor bolt 22 and an upper rack radial bolt 23. The double bolt fixing mode ensures the stability and load capacity of the protective fence 21 after installation, and can effectively resist external force impact during operation. Meanwhile, an adjustable bridge guardrail 24 is arranged between the protective fence 21 and the turnover element 3, which serves as a transition structure connecting the two, and provides a smooth transition area for the operating personnel to pass through.

[0036] The longitudinal stability position is realized by the upper rack foot bolt 22, and the transverse constraint is formed by cooperating with the upper rack radial bolt 23, and the two work together to ensure that the guardrail 21 is rigidly fixed during the operation of the unit and the operation of personnel, effectively resisting external force impact. Between the guardrail 21 and the turnover element 3, an adjustable over-bridge guardrail 24 is arranged to play a transition connecting role. The guardrail is designed in a modular manner, and is quickly disassembled and assembled with the guardrail 21 through a pedal connecting pin 25. At the same time, the height and levelness of the guardrail can be flexibly adjusted by means of a support connection adjustable bolt 26, so as to adapt to the installation reference surface of different workshops. It is worth noting that the guardrail 21 is specially provided with a front end door with a mechanical locking mechanism. The door is closed during major operations such as lifting and falling of the rotor, which can not only form physical isolation to prevent personnel from entering the operation prohibited area, but also avoid safety accidents caused by tool falling.

[0037] Referring to Figures 2-5 In an embodiment provided in the present application, the turnover element 3 comprises a telescopic turnover ladder 31 arranged at the end of the adjustable over-bridge guardrail 24 and connected in a hinged manner. This hinged design enables the telescopic turnover ladder 31 to have the characteristic of flexible rotation. Specifically, the telescopic turnover ladder 31 is connected with the adjustable over-bridge guardrail 24 through a telescopic ladder mounting pin 32. The mounting pin is not only a connecting shaft, but also can bear the weight of the ladder body and the load of the operating personnel, ensuring the structural strength of the connecting part.

[0038] The telescopic turnover ladder 31 is stably connected with the rotor yoke through a magnetic yoke bolt 33 and a magnetic yoke bolt fixing nut 34, and the end of the ladder body is fixed by means of the structural member of the rotor, thereby ensuring the overall stability of the ladder body during operation. At the same time, universal wheels 35 are arranged at the bottom end of the adjustable over-bridge guardrail 24. These universal wheels have a braking function, which can lock the position to prevent movement during the fixed operation of the module ladder, and can easily push the overall structure when the brake is released.

[0039] The side walls of the telescopic turnover ladder 31 are provided with side guardrails 36, which are symmetrically arranged with the center axis of the telescopic turnover ladder 31 as the reference, forming two symmetrical protective barriers. Both sides of the side guardrails 36 can be turned over, which can provide reliable lateral protection for personnel going up and down the ladder when in operation, and can reduce space occupation when folded for turning over the whole ladder body.

[0040] A fixed block 37 is arranged at the top end of the adjustable over-bridge guardrail 24. The fixed block is made of high-strength material and can limit the turning position of the telescopic turnover ladder 31. The hinge between the telescopic turnover ladder 31 and the fixed block 37 is arranged in a special "L" shape. This design enables the telescopic turnover ladder 31 to closely fit the adjustable over-bridge guardrail 24 when it is turned over and stored, ensuring that it will not exceed the range of the fixed element 2 after storage, thereby avoiding interference with the operation of the generator.

[0041] Referring to Figures 3-5 In an embodiment provided in the present application, the telescopic turnover ladder 31 is provided with a fixed plate 38 at one end away from the adjustable bridge guard 24, which serves as a transition component for connecting the ladder body and the rotor, thereby enhancing the contact area of the connecting part; the fixed plate 38 is provided with a slot that is accurately matched in size with the outer shape of the yoke bolt fixing nut 34, and the precise positioning and stable fixing of the end of the ladder body and the rotor yoke are achieved through the embedded connection of the slot and the nut.

[0042] The top end of the fixed plate 38 is provided with an adapter plate 39, which is integrally formed with the fixed plate 38 by welding or bolt connection, and the side wall thereof is connected with the main frame of the telescopic turnover ladder 31. Through this double connection structure, the connection strength and stability between the fixed plate 38 and the telescopic turnover ladder 31 are further enhanced, ensuring that there is no connection loosening during operation.

[0043] The length of the telescopic turnover ladder 31 is adjusted so that one end is connected with the adjustable bridge guard 24 through the telescopic ladder mounting pin 32, and the other end is connected with the yoke bolt fixing nut 34 through the slot on the fixed plate 38. The operating personnel can go back and forth between the fixed element 2 and the rotor through the turnover element 3 to complete the maintenance operation; at this time, the side protection structure on both sides of the turnover element 3 is unfolded to provide safety protection.

[0044] When the rotor needs to be lifted, lowered or the generator body needs to be operated, the turnover element 3 is disconnected from the yoke bolt fixing nut 34 and is turned to the inside of the fixed element 2, and the front door of the protection structure is closed to avoid interference of the turnover element 3 with the operation of the generator. If the module ladder needs to be transported, the whole can be moved through the universal wheels 35 at the bottom of the fixed element 2.

[0045] The telescopic length of the turnover element 3 can be adapted to different specifications of the rotor, and the bending design at the hinge ensures that the turnover element 3 fits closely with the fixed element 2 when it is stored, further reducing the space occupied.

[0046] Referring to Figures 1-5 In some embodiments, after the upper rack of the generator is removed, the guardrail is installed using the upper rack foundation bolt 22 and the upper rack radial bolt 23, the adjustable bridge guard 24 is installed using the pedal connecting pin 25 and the adjustable bolt 26 connected with the buttress, the height of the fence is adjusted, the length of the telescopic turnover ladder 31 is adjusted and connected between the telescopic ladder mounting pin 32 and the yoke bolt 33, and the operating personnel enter the rotor for maintenance with the help of the module ladder.

[0047] First, the guardrail 21 and the adjustable bridge guard 24 are fixed to form a stable transition platform;

[0048] Adjust the length of the telescopic turnover ladder 31, and connect its two ends with the adjustable bridge guardrail 24 and the rotor magnetic yoke respectively. At this time, the telescopic turnover ladder 31 is in an inclined state, and the operating personnel can go back and forth between the factory building and the rotor through the footboard, and the side guardrail 36 plays a protective role.

[0049] Disconnect the connection between the magnetic yoke bolt fixing nut 34 and the fixing plate 38 slot, and turn the telescopic turnover ladder 31 around the telescopic ladder mounting pin 32 to the adjustable bridge guardrail 24. The "L" type design and the limiting block 37 at the hinged part are used to ensure that the telescopic turnover ladder 31 completely avoids the rotor movement path.

[0050] At the same time, close the front door of the protective fence 21 to prevent personnel from entering the dangerous area by mistake; after the rotor is in place, reverse operation can restore the connection of the telescopic turnover ladder 31 to form a passageway again.

[0051] When transporting, the side guardrail 36 and the telescopic turnover ladder 31 are all turned over to the adjustable bridge guardrail 24, and the universal wheel 35 at the bottom end of the adjustable bridge guardrail 24 is used to realize the overall movement, without relying on the bridge machine and other equipment, which embodies the advantage of lightweight design.

[0052] Finally, it should be pointed out that the above detailed description of the method and device is only an embodiment, and those skilled in the art can modify the embodiment in different ways without departing from the scope of the present application.

Claims

1. A modular ladder for a hydraulic turbine generator rotor, characterized by: The utility model relates to a kind of water turbine generator rotor module ladder, including, Generator body (1); Fixed element (2), the fixed element (2) is located at the top end of generator body (1);And Turnover element (3), the turnover element (3) is hinged with fixed element (2); Wherein the turnover element (3) can be turned over to the inside of fixed element (2) without affecting the operation of generator body (1).

2. The modular ladder of claim 1, wherein: Fixed element (2) includes guardrail (21) by upper rack foot bolt (22) and upper rack radial bolt (23) is fixed on generator body (1), and adjustable overbridge guardrail (24) is arranged between the guardrail (21) and turnover element (3).

3. The modular ladder of claim 2, wherein: The adjustable overbridge guardrail (24) is installed by pedal connecting pin (25) and pier connecting adjustable bolt (26), and the guardrail (21) is provided with front end door for closing when rotor is lifted and falls back.

4. The modular ladder of claim 3, wherein: The turnover element (3) includes telescopic turnover ladder (31) arranged in the end of the adjustable overbridge guardrail (24) hinge, and the telescopic turnover ladder (31) is connected with adjustable overbridge guardrail (24) by telescopic ladder mounting pin (32).

5. The modular ladder of claim 4, wherein: And the telescopic turnover ladder (31) is connected with rotor yoke by magnetic yoke bolt (33) and magnetic yoke bolt fixing nut (34);The bottom of the adjustable overbridge guardrail (24) is provided with universal wheel (35).

6. The modular ladder of claim 5, wherein: The side wall of the telescopic turnover ladder (31) is provided with side guardrail (36), which is symmetrically arranged with the central axis of the telescopic turnover ladder (31), and the side guardrails (36) on both sides can be turned over.

7. The modular ladder of claim 6, wherein: The top of the adjustable overbridge guardrail (24) is provided with fixed block (37), and the hinge between the telescopic turnover ladder (31) and the fixed block (37) is arranged in an L shape.

8. The modular ladder of claim 7, wherein: The end of the telescopic turnover ladder (31) away from the adjustable overbridge guardrail (24) is provided with a fixed plate (38), and the fixed plate (38) is provided with a slot matched with the magnetic yoke bolt fixing nut (34).

9. The modular ladder of claim 8, wherein: The top of the fixed plate (38) is provided with a link plate (39), and the side wall of the link plate (39) is connected with the telescopic turnover ladder (31).

10. A method of using a modular ladder, the method comprising: The utility model relates to a kind of water turbine generator rotor module ladder, including, After removing the upper rack of generator, the guardrail is installed by upper rack foot bolt and upper rack radial bolt; The adjustable overbridge guardrail is installed by pedal connecting pin and pier connecting adjustable bolt, and the height of fence is adjusted; The length of telescopic turnover ladder is adjusted, and it is connected between telescopic ladder mounting pin and magnetic yoke bolt, and the module ladder is used to enter the rotor for maintenance.

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