Protection and maintenance device for generator rotor of nuclear power plant

Abstract

The utility model discloses a protection and maintenance device for a generator rotor of a nuclear power plant. The protection and maintenance device comprises a first inflatable protective shed and a second inflatable protective shed, the first inflatable protective shed is provided with an entrance and exit; the first inflatable protective shed comprises a first inflatable frame and a first protective sleeve, and a transparent window is formed in the first protective sleeve; and the second inflatable protective shed comprises a second inflatable frame and a second protective sleeve. According to the device, protection and maintenance facilities can be rapidly established after the nuclear power plant generator rotor is pulled out during nuclear power plant maintenance, heavy electrical equipment can be protected and maintained in time, equipment damage caused by introduction of foreign matters is avoided, and meanwhile, the maintenance work requirements can be met. The nuclear power plant generator rotor protection and maintenance device can maintain a foreign matter prevention isolation area, is high in structural strength, light in overall weight and easy to install, can be quickly built and dismantled when a generator is maintained, and reduces the maintenance site workload and human input.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a protective maintenance device for a rotor of a generator in a nuclear power plant. Background Art

[0002] A nuclear power generator is a Siemens water-hydrogen-hydrogen nuclear power steam turbine generator of model QFSN-1100-4 produced by Shanghai Generator Factory. Its rotor consists of a shaft, rotor winding, electrical connectors of the rotor winding, guard ring, center ring, multi-stage fan, coupling and damping system. When the unit is shut down and turned to maintenance status, according to the maintenance outline, the rotor needs to be regularly pulled out from the generator for inspection and testing to ensure that its function is reliable and meets the design requirements.

[0003] Since nuclear power plants are located in coastal areas, the ambient humidity is high all year round, and the ambient air is affected by seawater and is highly corrosive. When the generator rotor is pulled out, the generator rotor winding will be exposed to the ambient air as a whole. Affected by the ambient humidity and air, its insulation performance will drop rapidly, and the surface is prone to rust. As the generator is a major equipment in a power plant, the insulation performance of its rotor winding is seriously affected by the environment. In addition, in order to ensure that the introduction of foreign matter during the maintenance process will avoid the risk of equipment damage, it is necessary to promptly set up protective maintenance facilities after the generator rotor is pulled out, and physically protect the generator rotor, so that the rotor is in a confined space as a whole and insulate and maintain its internal winding.

[0004] Since the overall length of the nuclear power generator rotor is 14860mm and the maximum diameter is 1800mm, in order to meet the overall protection of the generator rotor and the insulation maintenance of the winding, and to take into account the maintenance work, the size of the protection and maintenance facilities should not be less than 18000mm long × 3500mm wide × 3000mm high. To set up such a generator rotor protection and maintenance facility, 8-10 people are required to use metal scaffolding to support the main structure first, and then 8-10 people are required to lay canvas on the metal frame and stick it. The overall erection and disassembly work requires a lot of manpower and a large workload, occupying a total of about 24 hours of the key path of the overhaul conventional island. There are also high industrial safety risks and risks of metal steel pipes colliding with important equipment during the erection process. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a protection and maintenance device for the rotor of a nuclear power plant generator.

[0006] The technical solution adopted by the present utility model to solve its technical problems is: to construct a protection and maintenance device for the generator rotor of a nuclear power plant, including a first inflatable protection shed and a second inflatable protection shed that are interconnected. Both the first inflatable protection shed and the second inflatable protection shed are longitudinally long columnar structures; one end of the first inflatable protection shed away from the second inflatable protection shed is provided with an inlet and outlet.

[0007] The first inflatable protection shed includes a first inflatable frame and a first protective cover covering the first inflatable frame, and a number of transparent windows are provided on the first protective cover.

[0008] The second inflatable protection shed includes a second inflatable frame and a second protective cover covering the second inflatable frame.

[0009] In some embodiments, the first inflatable frame includes a first inflatable support, a second inflatable support, and a third inflatable support that are sequentially connected, and an inlet and outlet are provided on the first inflatable support.

[0010] The first protective cover includes a first sub-protective cover covering the first inflatable support, a second sub-protective cover covering the second inflatable support, and a third sub-protective cover covering the third inflatable support.

[0011] In some embodiments, the first inflatable support includes a first arc-shaped inflatable column, a second arc-shaped inflatable column, and a number of first inflatable connecting columns. The first arc-shaped inflatable column and the second arc-shaped inflatable column are arranged opposite to each other, the first arc-shaped inflatable column is arranged away from the second inflatable support, and a number of the first inflatable connecting columns connect the first arc-shaped inflatable column and the second arc-shaped inflatable column.

[0012] The first inflatable support further includes at least two first inflatable support columns arranged in parallel at intervals, and at least two of the first inflatable support columns are vertically connected to the first arc-shaped inflatable column.

[0013] The first inflatable support further includes a second inflatable connecting column connecting the bottom of the first arc-shaped inflatable column and the bottom of the first inflatable support column.

[0014] In some embodiments, the second inflatable support includes a third arc-shaped inflatable column, a fourth arc-shaped inflatable column, and a number of third inflatable connecting columns. The third arc-shaped inflatable column and the fourth arc-shaped inflatable column are arranged opposite to each other, the third arc-shaped inflatable column is arranged close to the first inflatable support, and a number of the third inflatable connecting columns connect the third arc-shaped inflatable column and the fourth arc-shaped inflatable column.

[0015] In some embodiments, the number of the second inflatable supports is at least two.

[0016] In some embodiments, the third inflatable bracket includes a fifth arc-shaped inflatable column, a sixth arc-shaped inflatable column, and a plurality of fourth inflatable connecting columns. The fifth arc-shaped inflatable column and the sixth arc-shaped inflatable column are arranged oppositely, and the sixth arc-shaped inflatable column is disposed close to the second inflatable bracket.

[0017] A plurality of the fourth inflatable connecting columns connect the fifth arc-shaped inflatable column and the sixth arc-shaped inflatable column.

[0018] The third inflatable bracket further includes at least one second inflatable support column arranged in parallel and spaced apart. At least one of the second inflatable support columns is vertically connected to the fifth arc-shaped inflatable column.

[0019] The third inflatable bracket further includes a fifth inflatable connecting column connecting the bottom of the fifth arc-shaped inflatable column and the bottom of the second inflatable support column.

[0020] In some embodiments, the second inflatable bracket includes a first inflatable support column, a second inflatable support column, and a plurality of sixth inflatable connecting columns. The first inflatable support column and the second inflatable support column are arranged oppositely and spaced apart, and a plurality of the sixth inflatable connecting columns connect the first inflatable support column and the second inflatable support column.

[0021] In some embodiments, the longitudinal cross-sectional dimension of the first inflatable protective shed is larger than that of the second inflatable protective shed.

[0022] In some embodiments, both the first inflatable bracket and the second inflatable bracket are provided with air charging and discharging interfaces.

[0023] In some embodiments, the first protective sleeve and / or the second protective sleeve is provided with a storage box or a storage bag.

[0024] Implementing the present utility model has the following beneficial effects: The nuclear power plant generator rotor protection and maintenance device can rapidly establish protection and maintenance facilities after the nuclear power plant generator rotor is withdrawn during the nuclear power plant maintenance period, timely protect and maintain major electrical equipment, avoid introducing foreign objects to cause equipment damage, and at the same time can also take into account the needs of maintenance work. The nuclear power plant generator rotor protection and maintenance device can take into account the maintenance anti-foreign object isolation area, has high structural strength, is overall light, is simple to install, can be quickly erected and dismantled during generator maintenance, reduces the workload and manpower input at the maintenance site, avoids the occurrence of industrial safety incidents and major equipment damage incidents, and optimizes the critical path construction period of the conventional island during overhaul. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the technical solution of the present utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative work, other relevant drawings can also be obtained based on these drawings. In the drawings:

[0026] Figure 1 is a schematic structural diagram of a nuclear power plant generator rotor protection and maintenance device in some embodiments of the present utility model from one perspective;

[0027] Figure 2 is a schematic structural diagram of a nuclear power plant generator rotor protection and maintenance device in some embodiments of the present utility model from another perspective;

[0028] Figure 3 is a schematic structural diagram of a first inflation rack and a second inflation rack in some embodiments of the present utility model. Detailed implementation manners

[0029] In order to have a clearer understanding of the technical features, objectives, and effects of the present utility model, the detailed implementation manners of the present utility model will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings, and are constructed and operated in a specific orientation. This is only for the convenience of describing the present technical solution, and does not indicate that the indicated devices or elements must have a specific orientation. Therefore, it should not be construed as a limitation of the present utility model.

[0030] It should also be noted that, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. When a component is referred to as being "on" or "under" another component, the component can be "directly" or "indirectly" located above the other component, or there may also be one or more intermediate components. Terms such as "first", "second", "third", etc. are only for the convenience of describing the technical solution of the present invention, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures, technologies, etc. are proposed to thoroughly understand the embodiments of the present utility model. However, those skilled in the art should clearly understand that the present utility model can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present utility model.

[0032] Please refer to Figures 1 to 3 , the present utility model shows a nuclear power plant generator rotor protection and maintenance device, which can quickly establish protection and maintenance facilities after the nuclear power plant generator rotor is taken out during the nuclear power plant maintenance period, timely protect and maintain major electrical equipment, avoid introducing foreign objects to cause equipment damage, and at the same time can also take into account the needs of maintenance work. The nuclear power plant generator rotor protection and maintenance device can take into account the maintenance anti-foreign object isolation area, has high structural strength, is overall light, is simple to install, can be quickly built and demolished during generator maintenance, reduces the workload and manpower input at the maintenance site, avoids the occurrence of industrial safety incidents and major equipment damage incidents, and optimizes the critical path duration of the conventional island during the major overhaul.

[0033] The overall size of the nuclear power plant generator rotor protection and maintenance device is not less than 18000mm in length × 3500mm in width × 3000mm in height to meet the overall protection of the nuclear power plant generator rotor and the insulation maintenance of the winding, and at the same time can also take into account the needs of maintenance work.

[0034] The generator rotor protection and maintenance device of this nuclear power plant includes a first inflatable protection shed 10 and a second inflatable protection shed 20 that are interconnected. Both the first inflatable protection shed 10 and the second inflatable protection shed 20 are longitudinally long columnar structures. The first inflatable protection shed 10 has a longer length and can be used to store the main part of the generator rotor of the nuclear power plant. The second inflatable protection shed 20 can be used to store the ends of the generator rotor of the nuclear power plant. The first inflatable protection shed 10 and the second inflatable protection shed 20 can be connected together by means of hanging ropes, Velcro (hook-and-loop fasteners) and / or magnetic strips to ensure quick and reliable connection.

[0035] One end of the first inflatable protection shed 10 away from the second inflatable protection shed 20 is provided with an inlet / outlet A. Of course, the second inflatable protection shed 20 can also be provided with an inlet / outlet A. Further, a passage B can be provided between the first inflatable protection shed 10 and the second inflatable protection shed 20 to facilitate the passage of a part of the generator rotor of the nuclear power plant for placement and also facilitate the entry and exit of personnel.

[0036] The first inflatable protection shed 10 includes a first inflatable frame 11 and a first protective cover 12 covering the first inflatable frame 11. A door cloth opposite to the inlet / outlet A can be provided on the first protective cover 12. A number of transparent windows C are provided on the first protective cover 12. Preferably, the transparent windows C can be made of a light-transmitting material, which can not only achieve daylighting but also prevent foreign objects from entering the protection and maintenance device for the exciter of the nuclear power plant. The light-transmitting material can be a polyvinyl alcohol (PVA) resin film, or a PET film. The PET film is a film material made from polyethylene terephthalate as the raw material, extruded into a thick sheet, and then biaxially stretched. Of course, the light-transmitting material can also be other polymer films, which are not specifically limited here.

[0037] Preferably, the first inflatable frame 11 and the first protective cover 12 can be connected together by means of hanging ropes, Velcro (hook-and-loop fasteners) and / or magnetic strips to ensure quick and reliable connection. The material of the first inflatable frame 11 is PVC double-sided knife-coated fabric, which has good stability and excellent properties such as waterproof, anti-ultraviolet, anti-aging, corrosion-resistant, temperature-resistant, film-resistant, fold-resistant, soft and good elasticity. The first protective cover 12 can be PVC double-sided knife-coated fabric or made of other canvas.

[0038] The second inflatable protective shed 20 includes a second inflatable frame 21 and a second protective cover 22 covering the second inflatable frame 21. Preferably, the second inflatable frame 21 and the second protective cover 22 can be connected together by means of hanging ropes, Velcro (hook and loop fasteners) and / or magnetic strips, ensuring quick and reliable connection. The material of the first inflatable frame 11 is PVC double-sided knife-coated fabric, which has good stability and excellent properties such as waterproof, anti-ultraviolet, aging-resistant, corrosion-resistant, temperature-resistant, film-resistant, fold-resistant, soft and good elasticity. The second protective cover 22 can be made of PVC double-sided knife-coated fabric or other canvas.

[0039] In some embodiments, the first inflatable frame 11 includes a first inflatable support 111, a second inflatable support 112, and a third inflatable support 113 connected in sequence, and an inlet / outlet A is provided on the first inflatable support 111.

[0040] The first protective cover 12 may include a first sub-protective cover 121 covering the first inflatable support 111, a second sub-protective cover 122 covering the second inflatable support 112, and a third sub-protective cover 123 covering the third inflatable support 113.

[0041] As Figure 3 shown, in some embodiments, the first inflatable support 111 includes a first arc-shaped inflatable column 1111, a second arc-shaped inflatable column 1112, and a plurality of first inflatable connecting columns 1113. The first arc-shaped inflatable column 1111 and the second arc-shaped inflatable column 1112 are arranged oppositely. The first arc-shaped inflatable column 1111 is arranged away from the second inflatable support 112. The plurality of first inflatable connecting columns 1113 connect the first arc-shaped inflatable column 1111 and the second arc-shaped inflatable column 1112. The first arc-shaped inflatable column 1111 may be in a semi-circular arc structure, and the arc length of the second arc-shaped inflatable column 1112 may be less than the arc length of the first arc-shaped inflatable column 1111.

[0042] The first inflatable support 111 further includes at least two first inflatable support columns 1114 arranged in parallel at intervals. The at least two first inflatable support columns 1114 are vertically connected to the first arc-shaped inflatable column 1111. The first inflatable support 111 further includes a second inflatable connecting column 1115 connecting the bottom of the first arc-shaped inflatable column 1111 and the bottom of the first inflatable support column 1114 to define the inlet / outlet A. The structure of the first inflatable support 111 can be referred to Figure 3 for implementation. Of course, the structure of the first inflatable support 111 can also be selected and set according to actual needs, that is, appropriate structural adjustments can be made, and specific limitations are not made here.

[0043] As Figure 3As shown, in some embodiments, the second inflatable support 112 includes a third arc-shaped inflatable column 1121, a fourth arc-shaped inflatable column 1122, and a plurality of third inflatable connecting columns 1123. The third arc-shaped inflatable column 1121 and the fourth arc-shaped inflatable column 1122 are arranged oppositely. The structures of the third arc-shaped inflatable column 1121 and the fourth arc-shaped inflatable column 1122 are the same. Preferably, the structures of the third arc-shaped inflatable column 1121 and the fourth arc-shaped inflatable column 1122 can be the same as the structure of the second arc-shaped inflatable column 1112. The third arc-shaped inflatable column 1121 is disposed close to the first inflatable support 111. For example, the third arc-shaped inflatable column 1121 can be disposed close to the second arc-shaped inflatable column 1112 of the first inflatable support 111. A plurality of third inflatable connecting columns 1123 connect the third arc-shaped inflatable column 1121 and the fourth arc-shaped inflatable column 1122, and the third inflatable connecting columns 1123, the third arc-shaped inflatable column 1121, and the fourth arc-shaped inflatable column 1122 can be in a communicating arrangement to facilitate rapid inflation and deflation. Preferably, the number of the second inflatable supports 112 is at least two. Of course, the number of the second inflatable supports 112 can be selected according to actual needs and is not specifically limited here.

[0044] As Figure 3 As shown, in some embodiments, the third inflatable support 113 includes a fifth arc-shaped inflatable column 1131, a sixth arc-shaped inflatable column 1132, and a plurality of fourth inflatable connecting columns 1133. The fifth arc-shaped inflatable column 1131 and the sixth arc-shaped inflatable column 1132 are arranged oppositely. The sixth arc-shaped inflatable column 1132 is disposed close to the second inflatable support 112. The fifth arc-shaped inflatable column 1131 can be in a semi-circular arc structure. The arc length of the sixth arc-shaped inflatable column 1132 can be less than the arc length of the first arc-shaped inflatable column 1111. The structure of the fifth arc-shaped inflatable column 1131 after inflation can be the same as the structure of the first arc-shaped inflatable column 1111 after inflation. The structure of the sixth arc-shaped inflatable column 1132 after inflation can be the same as the structure of the second arc-shaped inflatable column 1112 after inflation. A plurality of fourth inflatable connecting columns 1133 connect the fifth arc-shaped inflatable column 1131 and the sixth arc-shaped inflatable column 1132. The third inflatable support 113 further includes at least one second inflatable support column 1134 arranged in parallel and spaced apart. At least one second inflatable support column 1134 is vertically connected to the fifth arc-shaped inflatable column 1131. The third inflatable support 113 further includes a fifth inflatable connecting column 1135 connecting the bottom of the fifth arc-shaped inflatable column 1131 and the bottom of the second inflatable support column 1134.

[0045] As Figure 3As shown, in some embodiments, the second inflatable rack 21 includes a first inflatable support column 211, a second inflatable support column 212, and a plurality of sixth inflatable connection columns 213. The first inflatable support column 211 and the second inflatable support column 212 are arranged at intervals opposite to each other, and the first inflatable support column 211 and the second inflatable support column 212 may be generally in an n shape. A plurality of sixth inflatable connection columns 213 connect the first inflatable support column 211 and the second inflatable support column 212.

[0046] As Figure 1 and Figure 2 As shown, the longitudinal section size of the first inflatable protective shed 10 is larger than that of the second inflatable protective shed 20. The overall structure of the first inflatable protective shed 10 may be generally in a semi-cylindrical structure, and the overall structure of the second inflatable protective shed 20 may be generally in a quarter-cylindrical structure.

[0047] In some embodiments, both the first inflatable rack 11 and the second inflatable rack 21 are provided with air charging and discharging interfaces. The air charging and discharging interfaces can be used to connect to inflating devices such as air compressors for inflation, and can also be used to connect to air extraction devices such as air extractors for air extraction. Of course, an inflating interface and an air extraction interface can also be provided independently.

[0048] In some embodiments, the air charging and discharging interface is provided with a valve, and the valve can control the gas flow rate of air charging and discharging, etc.

[0049] In some embodiments, the first protective sleeve 12 and / or the second protective sleeve 22 are provided with storage boxes or storage bags for facilitating the storage of related operating parts such as wrenches. Of course, the storage box or storage bag may not be provided, and no specific limitation is made here.

[0050] It can be understood that the nuclear power plant generator rotor protection and maintenance device can quickly establish protection and maintenance facilities after the generator rotor is taken out during the maintenance of the nuclear power plant, timely protect and maintain major electrical equipment, avoid introducing foreign objects to cause equipment damage, and at the same time can also take into account the needs of maintenance work. The special inflatable maintenance device can take into account the maintenance anti-foreign object isolation area, has high structural strength, is overall light, is simple to install, can be quickly built and demolished during generator maintenance, reduces the workload and manpower input at the maintenance site (the air charging and discharging time does not exceed 0.5 hours), avoids the occurrence of industrial safety incidents and major equipment damage incidents, and optimizes the critical path construction period of the conventional island during the major overhaul.

[0051] Understandably, the above embodiments only represent the preferred embodiments of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present utility model; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, the above technical features can be freely combined, and several deformations and improvements can also be made, and these all belong to the protection scope of the present utility model; therefore, all equivalent transformations and modifications made to the scope of the claims of the present utility model shall fall within the scope covered by the claims of the present utility model.

Claims

1. A protective maintenance device for a generator rotor of a nuclear power plant, characterized in that, It includes a first inflatable protective shed (10) and a second inflatable protective shed (20) that are interconnected. Both the first inflatable protective shed (10) and the second inflatable protective shed (20) are longitudinally long columnar structures. One end of the first inflatable protective shed (10) away from the second inflatable protective shed (20) is provided with an inlet / outlet (A). The first inflatable protective shed (10) includes a first inflatable frame (11) and a first protective sleeve (12) covering the first inflatable frame (11). A number of transparent windows are provided on the first protective sleeve (12). The second inflatable protective shed (20) includes a second inflatable frame (21) and a second protective sleeve (22) covering the second inflatable frame (21).

2. The nuclear power plant generator rotor protection and maintenance device according to claim 1, characterized in that The first inflatable frame (11) includes a first inflatable support (111), a second inflatable support (112), and a third inflatable support (113) connected in sequence. The inlet / outlet (A) is provided on the first inflatable support (111). The first protective sleeve (12) includes a first sub-protective sleeve (121) covering the first inflatable support (111), a second sub-protective sleeve (122) covering the second inflatable support (112), and a third sub-protective sleeve (123) covering the third inflatable support (113).

3. The nuclear power plant generator rotor protection and maintenance device according to claim 2, characterized in that The first inflatable support (111) includes a first arc-shaped inflatable column (1111), a second arc-shaped inflatable column (1112), and a number of first inflatable connecting columns (1113). The first arc-shaped inflatable column (1111) and the second arc-shaped inflatable column (1112) are arranged oppositely. The first arc-shaped inflatable column (1111) is arranged away from the second inflatable support (112). A number of the first inflatable connecting columns (1113) connect the first arc-shaped inflatable column (1111) and the second arc-shaped inflatable column (1112). The first inflatable support (111) further includes at least two first inflatable support columns (1114) arranged in parallel at intervals. At least two of the first inflatable support columns (1114) are vertically connected to the first arc-shaped inflatable column (1111). The first inflatable support (111) further includes a second inflatable connecting column (1115) connecting the bottom of the first arc-shaped inflatable column (1111) and the bottom of the first inflatable support column (1114).

4. The nuclear power plant generator rotor protection and maintenance device according to claim 2, characterized in that, The second inflatable support (112) includes a third arc-shaped inflatable column (1121), a fourth arc-shaped inflatable column (1122), and a number of third inflatable connecting columns (1123). The third arc-shaped inflatable column (1121) and the fourth arc-shaped inflatable column (1122) are arranged oppositely. The third arc-shaped inflatable column (1121) is arranged close to the first inflatable support (111). A number of the third inflatable connecting columns (1123) connect the third arc-shaped inflatable column (1121) and the fourth arc-shaped inflatable column (1122).

5. The nuclear power plant generator rotor protection and maintenance device according to claim 4, wherein The number of the second inflatable supports (112) is at least two.

6. The nuclear power plant generator rotor protection and maintenance device according to claim 2, wherein The third inflatable support (113) includes a fifth arc-shaped inflatable column (1131), a sixth arc-shaped inflatable column (1132), and a number of fourth inflatable connecting columns (1133). The fifth arc-shaped inflatable column (1131) and the sixth arc-shaped inflatable column (1132) are arranged opposite to each other, and the sixth arc-shaped inflatable column (1132) is arranged close to the second inflatable support (112). A number of the fourth inflatable connecting columns (1133) connect the fifth arc-shaped inflatable column (1131) and the sixth arc-shaped inflatable column (1132). The third inflatable support (113) further includes at least one second inflatable support column (1134) arranged in parallel and spaced apart. At least one of the second inflatable support columns (1134) is vertically connected to the fifth arc-shaped inflatable column (1131). The third inflatable support (113) further includes a fifth inflatable connecting column (1135) connecting the bottom of the fifth arc-shaped inflatable column (1131) and the bottom of the second inflatable support column (1134).

7. The nuclear power plant generator rotor protection and maintenance device according to claim 4, characterized in that, The second inflatable frame (21) includes a first inflatable support column (211), a second inflatable support column (212), and a number of sixth inflatable connecting columns (213). The first inflatable support column (211) and the second inflatable support column (212) are arranged opposite to each other at intervals, and a number of the sixth inflatable connecting columns (213) connect the first inflatable support column (211) and the second inflatable support column (212).

8. The nuclear power plant generator rotor protection and maintenance device according to claim 1, characterized in that, The longitudinal section size of the first inflatable protective shed (10) is larger than that of the second inflatable protective shed (20).

9. The nuclear power plant generator rotor protection and maintenance device according to claim 1, characterized in that, Both the first inflatable frame (11) and the second inflatable frame (21) are provided with air charging and discharging interfaces.

10. The generator rotor protection and maintenance device for a nuclear power plant according to claim 1, characterized in that, The first protective sleeve (12) and / or the second protective sleeve (22) is provided with a storage box or a storage bag.

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