Protective maintenance device for hydrogen cooler and air cooler of nuclear power plant generator

Abstract

The utility model discloses a protection and maintenance device for a hydrogen cooler and an air cooler of a nuclear power plant generator. The protection and maintenance device comprises a first inflatable protective shed, a second inflatable protective shed and a third inflatable protective shed, the first inflatable protective shed comprises a first inflatable frame and a first protective cover, the second inflatable protective shed comprises a second inflatable frame and a second protective cover, and the third inflatable protective shed comprises a third inflatable frame and a third protective cover. According to the protection and maintenance device for the hydrogen cooler and the air cooler of the nuclear power plant generator, protection and maintenance facilities can be quickly established after nuclear power plant equipment such as the hydrogen cooler and the air cooler are detached and hoisted out during the maintenance of the nuclear power plant, heavy electrical equipment is protected and maintained in time, equipment damage caused by introduction of foreign matters is avoided, and meanwhile the maintenance work requirement can be met. The device is high in structural strength, light in overall weight, easy to install and capable of being rapidly built and dismantled when the hydrogen cooler and the air cooler are overhauled, and the workload and manpower input of an overhauling site are reduced.

Description

Technical Field

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

[0002] A nuclear power generator is a Siemens water-hydrogen nuclear power steam turbine generator with model QFSN-1100-4 produced by Shanghai Generator Factory, and the exciter is an AC brushless exciter unit with model 16NSP-BLE16-42×62-5800kW produced by Shanghai Generator Factory. During the operation of the generator and exciter equipment, a large amount of heat energy will be generated in its windings and cores due to electromagnetic damage, alternating magnetic fields and other reasons. The generator and exciter are cooled by hydrogen and air respectively. In order to ensure that the hydrogen and air can maintain a continuous cooling effect, the manufacturer designed four hydrogen coolers and two air coolers on a single generator and exciter equipment to cool the hydrogen and air.

[0003] When the unit is shut down for maintenance, the hydrogen cooler and air cooler must be regularly dismantled, lifted out for inspection and testing according to the maintenance outline to ensure that their functions are reliable and meet the design requirements.

[0004] Since many nuclear power plants are located along the coast, the environmental humidity is high all year round, and the ambient air is affected by seawater and is highly corrosive. When the hydrogen cooler and air cooler are hoisted out, the whole will be exposed to the ambient air. Affected by the ambient humidity and air, the surface is prone to rust. Since the generator is a major equipment in the power plant, in order to avoid the risk of equipment damage caused by the introduction of foreign objects during the maintenance process, it is necessary to promptly set up protective maintenance facilities after the generator hydrogen cooler and the exciter air cooler are disassembled and hoisted, and to provide physical protection for the generator hydrogen cooler and the exciter air cooler. Since the overall length of the hydrogen cooler of the Yangjiang Nuclear Power Generator is about 4750mm, the width is about 760mm, and the thickness is about 600mm; the overall length of the air cooler is about 2120mm, the width is about 920mm, and the thickness is about 465mm. In order to meet the overall protection and maintenance of the four hydrogen coolers of the generator and the two air coolers of the exciter, and at the same time take into account the maintenance work needs, the size of the protective maintenance facilities should be no less than 7500mm long × 6000mm wide × 2500mm high. To set up such protection and maintenance facilities for hydrogen coolers and air coolers, 6-8 people are needed to first use metal scaffolding to support the main structure, and then 6-8 people are needed to lay canvas on the metal frame and stick it on. The overall erection and disassembly work requires a lot of manpower and a large workload, occupying the critical path of the overhaul conventional island for about 24 hours. During the erection process, there are also high industrial safety risks and the risk of metal steel pipes colliding with important equipment. Utility Model Content

[0005] The technical problem to be solved by the present utility model is to provide a protection and maintenance device for the air-cooled cooler of the hydrogen-cooled generator in a nuclear power plant.

[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 air-cooled cooler of the hydrogen-cooled generator in a nuclear power plant, including a first inflatable protection shed, a second inflatable protection shed, and a third inflatable protection shed arranged in sequence. The first inflatable protection shed is provided with an inlet and an outlet, and a first shielding member is provided at the inlet and the outlet. An access passage communicating with each other is provided between the first inflatable protection shed, the second inflatable protection shed, and the third inflatable protection shed.

[0007] The first inflatable protection shed includes a first inflatable frame and a first protective cover covering the first inflatable frame. The second inflatable protection shed includes a second inflatable frame and a second protective cover covering the second inflatable frame. The third inflatable protection shed includes a third inflatable frame and a third protective cover covering the third inflatable frame.

[0008] In some embodiments, the first inflatable frame, the second inflatable frame, and the third inflatable frame are all provided with air charging and discharging interfaces.

[0009] In some embodiments, a valve is provided at the air charging and discharging interface.

[0010] In some embodiments, the first inflatable frame, the second inflatable frame, and / or the third inflatable frame has a cubic structure.

[0011] In some embodiments, the first inflatable frame includes a plurality of first inflatable support columns arranged vertically, a plurality of first inflatable connecting columns connecting the bottoms of the plurality of first inflatable support columns, and a plurality of second inflatable connecting columns connecting the tops of the plurality of first inflatable support columns.

[0012] In some embodiments, the second inflatable frame includes a plurality of second inflatable support columns arranged vertically, a plurality of third inflatable connecting columns connecting the bottoms of the plurality of second inflatable support columns, and a plurality of fourth inflatable connecting columns connecting the tops of the plurality of second inflatable support columns.

[0013] In some embodiments, the third inflatable frame includes a plurality of third inflatable support columns arranged vertically, a plurality of fifth inflatable connecting columns connecting the bottoms of the plurality of third inflatable support columns, and a plurality of sixth inflatable connecting columns connecting the tops of the plurality of third inflatable support columns.

[0014] In some embodiments, the first protective cover, the second protective cover, and / or the third protective cover is provided with a viewing window.

[0015] In some embodiments, a storage container is provided inside the first protective cover, the second protective cover, and / or the third protective cover.

[0016] In some embodiments, a second shielding member is provided in the access passage.

[0017] Implementing the present utility model has the following beneficial effects: The nuclear power plant generator hydrogen cooler and air cooler protection and maintenance device can quickly establish protection and maintenance facilities after the hydrogen cooler, air cooler and other nuclear power plant equipment are disassembled and lifted out during the maintenance of the nuclear power plant, promptly 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 hydrogen cooler and air cooler 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 the maintenance of the hydrogen cooler and air cooler, 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the present utility model, the present utility model will be further described below in conjunction with the 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 limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings. In the drawings:

[0019] Figure 1 is a schematic structural diagram of the nuclear power plant generator hydrogen cooler and air cooler protection and maintenance device in some embodiments of the present utility model;

[0020] Figure 2 is a schematic structural diagram of the first inflatable frame, the second inflatable frame, and the third inflatable frame spliced together in some embodiments of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to have a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific embodiments of the present utility model will now be described in detail with reference to the 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, only for the convenience of describing the technical solution, rather than indicating that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0022] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installation", "connection", "attachment", "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 an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" located above the other element, or there may also be one or more intermediate elements. Terms such as "first", "second", "third", etc. are only for the convenience of describing the present technical solution, 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. can 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.

[0023] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as 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.

[0024] Please refer to Figure 1 and Figure 2 , the present utility model shows a protection and maintenance device for the hydrogen cooler and air cooler of a nuclear power plant generator, which can be used for the protection and maintenance of nuclear power plant equipment, and the nuclear power plant equipment includes but is not limited to hydrogen coolers and air coolers.

[0025] The overall structure of the protection and maintenance device for the hydrogen cooler and air cooler of the nuclear power plant generator is generally a cuboid structure, and its top is generally a flat top structure. The protection and maintenance device for the hydrogen cooler and air cooler of the nuclear power plant generator meets the overall protection of four hydrogen coolers and two air coolers and the winding insulation maintenance, and at the same time takes into account the needs of maintenance work. The overall dimensions are not less than 7500 mm in length × 6000 mm in width × 2500 mm in height.

[0026] The protection and maintenance device for the hydrogen cooler and air cooler of the nuclear power plant generator may include a first inflatable protection shed 10, a second inflatable protection shed 20, and a third inflatable protection shed 30 arranged in sequence. Preferably, the first inflatable protection shed 10, the second inflatable protection shed 20, and the third inflatable protection shed 30 can be connected together by means of hanging ropes, magic tapes (hook-and-loop tapes), and / or magnetic strips.

[0027] The first inflatable protective shed 10 is provided with an inlet / outlet A, and the inlet / outlet A is provided with a first shielding member 40, which may include but is not limited to a door cloth. The inlet / outlet A can be used for the entry and exit of staff and materials. Moreover, the first inflatable protective shed 10, the second inflatable protective shed 20, and the third inflatable protective shed 30 all form spaces for storing nuclear power plant equipment. For example, the first inflatable protective shed 10 and the second inflatable protective shed 20 can be used to store hydrogen coolers, and the third inflatable protective shed 30 can be used to store air coolers.

[0028] An interconnected access passage B is provided between the first inflatable protective shed 10, the second inflatable protective shed 20, and the third inflatable protective shed 30. The access passage B is provided with a second shielding member, which includes but is not limited to a door cloth. When the staff does not move through the access passage B, the second shielding member can be lowered so that the first inflatable protective shed 10, the second inflatable protective shed 20, and the third inflatable protective shed 30 can be relatively isolated. The first shielding member and the second shielding member can both be made of PVC double-sided knife-coated fabric, or other canvas can be used.

[0029] The first inflatable protective shed 10 includes a first inflatable frame 11 and a first protective cover 12 covering the first inflatable frame 11. The first protective cover 12 and the first inflatable frame 11 can be connected together by means of hanging ropes, Velcro (hook-and-loop fasteners), and / or magnetic strips to ensure rapid 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 made of PVC double-sided knife-coated fabric, or other canvas can be used.

[0030] The second inflatable protective shed 20 includes a second inflatable frame 21 and a second protective cover 22 covering the second inflatable frame 21. The second protective cover 22 and the second inflatable frame 21 can be connected together by means of hanging ropes, Velcro (hook-and-loop fasteners), and / or magnetic strips to ensure rapid and reliable connection. The material of the second inflatable frame 21 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 second protective cover 22 can be made of PVC double-sided knife-coated fabric, or other canvas can be used.

[0031] The third inflatable protective shed 30 includes a third inflatable frame 31 and a third protective cover 32 covering the third inflatable frame 31. The third protective cover 32 and the third inflatable frame 31 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 third inflatable frame 31 is PVC double-sided knife-coated fabric, which has good stability and excellent properties such as waterproof, ultraviolet-proof, aging-resistant, corrosion-resistant, temperature-resistant, film-resistant, fold-resistant, soft and good elasticity. The third protective cover 32 can be made of PVC double-sided knife-coated fabric or other canvas.

[0032] In some embodiments, the first inflatable frame 11, the second inflatable frame 21 and the third inflatable frame 31 are all provided with inflation and deflation interfaces, which can be used to connect inflation equipment such as an air compressor for inflation, or can also be used to connect exhaust equipment such as an air extractor for exhaust. Of course, it is also possible to independently set an inflation interface and an exhaust interface.

[0033] In some embodiments, the inflation and deflation interface is provided with a valve, and the valve can control the gas flow rate of inflation and deflation, etc.

[0034] In some embodiments, the first inflatable frame 11, the second inflatable frame 21 and / or the third inflatable frame 31 are in a cubic structure, as Figure 2 shown, the first inflatable frame 11, the second inflatable frame 21 and / or the third inflatable frame 31 can be generally in a cuboid structure.

[0035] As Figure 2 shown, in some embodiments, the first inflatable frame 11 includes a plurality of first inflatable support columns 111 arranged vertically, a plurality of first inflatable connection columns 112 connecting the bottoms of the plurality of first inflatable support columns 111, and a plurality of second inflatable connection columns 113 connecting the tops of the plurality of first inflatable support columns 111. The connection manner of the first inflatable support columns 111, the first inflatable connection columns 112 and the second inflatable connection columns 113 can be as Figure 2 shown, or the first inflatable frame 11 can select a suitable structure according to actual needs, and no specific limitation is made here.

[0036] As Figure 2 shown, in some embodiments, the second inflatable frame 21 includes a plurality of second inflatable support columns 211 arranged vertically, a plurality of third inflatable connection columns 212 connecting the bottoms of the plurality of second inflatable support columns 211, and a plurality of fourth inflatable connection columns 213 connecting the tops of the plurality of second inflatable support columns 211. The connection manner of the second inflatable support columns 211, the third inflatable connection columns 212 and the fourth inflatable connection columns 213 can be as Figure 2As shown, or the second inflatable frame 21 may select a suitable structure according to actual requirements, which is not specifically limited here.

[0037] As Figure 2 shown, in some embodiments, the third inflatable frame 31 includes a plurality of third inflatable support columns 311 arranged vertically, a plurality of fifth inflatable connection columns 312 connecting the bottoms of the plurality of third inflatable support columns 311, and a plurality of sixth inflatable connection columns 313 connecting the tops of the plurality of third inflatable support columns 311. The connection manners of the third inflatable support columns 311, the fifth inflatable connection columns 312, and the sixth inflatable connection columns 313 may be as Figure 2 shown, or the third inflatable frame 31 may select a suitable structure according to actual requirements, which is not specifically limited here.

[0038] As Figure 1 shown, the first protective cover 12, the second protective cover 22, and / or the third protective cover 32 are provided with a window 50. Preferably, the sides of the first protective cover 12, the second protective cover 22, and the third protective cover 32 may all be provided with the window 50. The window 50 is made of a light-transmitting material, which can not only achieve daylighting but also prevent foreign objects from entering the protective and maintenance device for the nuclear power plant exciter. The light-transmitting material may 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 may also be other polymer films, which are not specifically limited here.

[0039] In some embodiments, a storage container is provided inside the first protective cover 12, the second protective cover 22, and / or the third protective cover 32. The storage container may include but is not limited to a storage bag or a storage box, so as to facilitate the storage of related operating parts such as wrenches, or the storage of related components such as screws or covers of hydrogen coolers and air coolers.

[0040] The protective and maintenance device for the hydrogen cooler and air cooler of the nuclear power plant generator can quickly establish protective and maintenance facilities after the hydrogen cooler, air cooler and other nuclear power plant equipment are disassembled and lifted out during the nuclear power plant maintenance period, timely perform protective and maintenance on 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 protective and maintenance device for the hydrogen cooler and air cooler of the nuclear power plant generator can take into account the maintenance anti-foreign object isolation area. It has high structural strength, is overall light, and is simple to install. It can be quickly built and disassembled during the maintenance of the hydrogen cooler and air cooler, reducing the workload and manpower input at the maintenance site (the inflation and deflation time does not exceed 0.5 hours), avoiding the occurrence of industrial safety incidents and major equipment damage incidents, and optimizing the critical path construction period of the conventional island during the major overhaul.

[0041] Understandably, the above embodiments only represent the preferred embodiments of the present utility model, and the description thereof is relatively specific and detailed. However, 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, which all fall within 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 protection and maintenance device for the air-cooler of the hydrogen cooler of a nuclear power plant generator, characterized in that, It includes a first inflatable protective shed (10), a second inflatable protective shed (20), and a third inflatable protective shed (30) arranged in sequence. The first inflatable protective shed (10) is provided with an inlet / outlet (A), and the inlet / outlet (A) is provided with a first shielding member. There is an access passage (B) communicating with each other between the first inflatable protective shed (10), the second inflatable protective shed (20), and the third inflatable protective shed (30). The first inflatable protective shed (10) includes a first inflatable frame (11) and a first protective cover (12) covering the first inflatable frame (11). The second inflatable protective shed (20) includes a second inflatable frame (21) and a second protective cover (22) covering the second inflatable frame (21). The third inflatable protective shed (30) includes a third inflatable frame (31) and a third protective cover (32) covering the third inflatable frame (31).

2. The hydrogen cooler and air cooler protection and maintenance device for the generator of a nuclear power plant according to claim 1, wherein The first inflatable frame (11), the second inflatable frame (21), and the third inflatable frame (31) are all provided with air charging / discharging interfaces.

3. The air-cooled cooler protection and maintenance device for the hydrogen-cooled cooler of the nuclear power plant generator according to claim 2, wherein, The air charging / discharging interface is provided with a valve.

4. The air-cooled cooler protection and maintenance device for the hydrogen-cooled cooler of the nuclear power plant generator according to claim 1, characterized in that, The first inflatable frame (11), the second inflatable frame (21), and / or the third inflatable frame (31) has a cubic structure.

5. The air-cooled cooler protection and maintenance device for the hydrogen-cooled cooler of the nuclear power plant generator according to claim 1, wherein, The first inflatable frame (11) includes a plurality of first inflatable support columns (111) arranged vertically, a plurality of first inflatable connecting columns (112) connecting the bottoms of the plurality of first inflatable support columns (111), and a plurality of second inflatable connecting columns (113) connecting the tops of the plurality of first inflatable support columns (111).

6. The air-cooled cooler protection and maintenance device for the hydrogen-cooled cooler of the nuclear power plant generator according to claim 1, characterized in that, The second inflatable frame (21) includes a plurality of second inflatable support columns (211) arranged vertically, a plurality of third inflatable connecting columns (212) connecting the bottoms of the plurality of second inflatable support columns (211), and a plurality of fourth inflatable connecting columns (213) connecting the tops of the plurality of second inflatable support columns (211).

7. The air-cooled cooler protection and maintenance device for the hydrogen-cooled generator of a nuclear power plant according to claim 1, characterized in that, The third inflatable frame (31) includes a plurality of third inflatable support columns (311) arranged vertically, a plurality of fifth inflatable connecting columns (312) connecting the bottoms of the plurality of third inflatable support columns (311), and a plurality of sixth inflatable connecting columns (313) connecting the tops of the plurality of third inflatable support columns (311).

8. The air-cooled cooler protection and maintenance device for the hydrogen-cooled cooler of the nuclear power plant generator according to claim 1, characterized in that, The first protective cover (12), the second protective cover (22), and / or the third protective cover (32) is provided with a viewing window (50).

9. The air-cooled cooler protection and maintenance device for the hydrogen-cooled cooler of the generator in a nuclear power plant according to claim 1, wherein, A storage container is provided inside the first protective cover (12), the second protective cover (22), and / or the third protective cover (32).

10. The air-cooled cooler protection and maintenance device for the hydrogen-cooled cooler of the nuclear power plant generator according to claim 1, characterized in that, The access passage (B) is provided with a second shielding member.

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