Simulation platform for steam generator of nuclear power unit

Abstract

The utility model relates to a nuclear power unit steam generator simulation platform which simulates a real steam generator structure and a working environment, and maintenance personnel can carry out repeated practice training on the simulation platform, so that the maintenance skill and the emergency response capability of the maintenance personnel are obviously improved. And on the other hand, maintenance personnel are allowed to operate and practice in a safe and controllable environment, risks possibly caused by direct operation on actual equipment are avoided, and the accident probability caused by human errors is reduced. And maintenance personnel can master necessary operation procedures and technical key points skillfully before formal maintenance, so that the time required by actual maintenance is effectively shortened, and the working efficiency is improved. Meanwhile, the number of times of misoperation on actual equipment is reduced through simulation training, the expensive steam generator is protected against damage, unnecessary material loss is reduced, and therefore the overall maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of nuclear power units, in particular to a simulation platform for a steam generator of a nuclear power unit. Background Art

[0002] The steam generator in a nuclear power plant is one of the key safety and operation components. Its main function is to convert the thermal energy generated by the reactor into steam, and then drive the turbine generator to generate electricity. Due to the harsh internal environment and complex structure of the steam generator, problems such as corrosion and scaling may occur after long-term operation. Therefore, it is crucial to regularly inspect and maintain it.

[0003] Currently, during the major overhaul of the steam generator, there is usually a lack of dedicated simulation training equipment. Such a simulator can be used to simulate the working state of a real steam generator and possible fault situations, which is extremely important for the technical training and practical operation preparation of maintenance personnel. However, in the related technology, there is a lack of a dedicated simulator for the steam generator, resulting in it being difficult for maintenance personnel to obtain sufficient practical experience without damaging the actual equipment, thus affecting the maintenance efficiency and safety. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a simulation platform for a steam generator of a nuclear power unit, which can solve the problem that maintenance personnel cannot conduct sufficient and effective training before actual operation due to the lack of a dedicated steam generator simulation practice, resulting in excessive uncertainty and risk during the maintenance process.

[0005] The utility model provides a simulation platform for a steam generator of a nuclear power unit, which includes:

[0006] A simulation mechanism, including a housing, a partition tube sheet and a movable tube device. The partition tube sheet is arranged in the housing to divide the housing into a primary side cavity and a secondary side cavity. The movable tube device is detachably arranged on the partition tube sheet and is located in the secondary side cavity;

[0007] A support platform mechanism, including a support device and a stepping platform. The support device is arranged on the housing, and the stepping platform is arranged around the housing;

[0008] A primary side simulation mechanism, including a main pipeline interface and a manhole device. The main pipeline interface and the manhole device are both arranged on the housing and are both communicated with the primary side cavity; and

[0009] A secondary side simulation mechanism, including a plurality of handhole devices. Each handhole device is arranged on the housing, and each handhole device is communicated with the secondary side cavity.

[0010] Preferably, the movable tube device includes a lower fixing plate, an upper fixing plate and a plurality of heat transfer tubes. The lower fixing plate is detachably arranged on the partition tube plate. The lower fixing plate and the upper fixing plate are arranged in parallel at intervals. One end of each heat transfer tube passes through the upper fixing plate, and the other end of each heat transfer tube is arranged on the lower fixing plate. Both ends of each heat transfer tube are open.

[0011] Preferably, the partition tube plate is provided with a profiling groove on the surface facing the secondary side cavity, and an avoidance hole communicating with the primary side cavity is opened at the bottom of the profiling groove;

[0012] The movable tube device further includes a plurality of fixing members. The lower fixing plate is detachably arranged in the profiling groove. Each fixing member passes through the lower fixing plate and is fixed in the profiling groove. The ends of each heat transfer tube are exposed in the avoidance hole.

[0013] Preferably, the main pipeline interface is in a cylindrical shape with both ends open. One end of the main pipeline interface communicates with the primary side cavity, and the other end of the main pipeline interface inclines downward; and / or

[0014] The main pipeline interface is located below the housing.

[0015] Preferably, the manhole device includes a manhole flange, a manhole sealing plate, a manhole cover plate and a plurality of manhole fixing members. One end of the manhole flange communicates with the primary side cavity. The manhole sealing plate is covered on the other end of the manhole flange. The manhole cover plate is covered on the manhole sealing plate. Each manhole fixing member passes through the manhole cover plate and is fixed on the manhole flange, so that the manhole sealing plate correspondingly seals the gap between the manhole flange and the manhole cover plate.

[0016] Preferably, each handhole device includes a handhole flange, a handhole sealing plate, a handhole cover plate and a handhole fixing member;

[0017] One end of each handhole flange communicates with the secondary side cavity. Each handhole sealing plate correspondingly covers the other end of each handhole flange. Each handhole cover plate correspondingly covers the handhole sealing plate. The handhole fixing members pass through the handhole cover plates and are fixed on the handhole flanges, so that the handhole sealing plates correspondingly seal the mating gaps between the handhole flanges and the handhole cover plates.

[0018] Preferably, the handhole flanges are evenly spaced along the surface of the housing.

[0019] Preferably, the stepping platform includes a ladder assembly, a platform assembly and a plurality of legs. The ladder assembly is inclined, and the top of the ladder assembly is connected to the platform assembly. Each of the legs is vertically disposed and the top of each leg in the height extension direction is connected to the platform assembly.

[0020] Preferably, the ladder assembly includes side beams and a plurality of step plates. The side beams are inclined and connected to the platform assembly. Each of the step plates is sequentially arranged at intervals along the length extension direction of the side beams; and / or

[0021] The platform assembly includes a platform fence and a plurality of platform treads. At least part of the platform treads are sequentially connected along the outer circumference of the housing. The platform fence is arranged at the edge of each platform tread away from the housing.

[0022] Preferably, the support device includes three support columns and three support blocks. Each of the support blocks is correspondingly arranged at the top of each support column. The three support blocks respectively abut against the housing. One of the support columns is located between the main pipeline interface and the manhole device.

[0023] Implementing the present invention has the following beneficial effects:

[0024] The present invention relates to a simulation platform for a steam generator of a nuclear power unit. By simulating the structure and working environment of a real steam generator, maintenance personnel can conduct repeated practical training on the simulation platform, thereby significantly improving their maintenance skills and the ability to respond to emergencies. On the other hand, it also allows maintenance personnel to perform operation exercises in a safe and controllable environment, avoiding the risks that may be brought about by directly operating on actual equipment and reducing the accident probability caused by human errors.

[0025] Furthermore, through the design of the primary side simulation mechanism and the secondary side simulation mechanism, the present invention can simulate a variety of common fault scenarios, which helps maintenance personnel to be familiar with different types of fault manifestation forms, thereby improving their fault diagnosis and handling speed. Enabling maintenance personnel to master the necessary operation procedures and technical key points proficiently before formal maintenance effectively shortens the time required for actual maintenance and improves work efficiency. At the same time, it also reduces the number of incorrect operations on actual equipment through simulation training, not only protecting the expensive steam generator from damage, but also reducing unnecessary material losses, thereby reducing the overall maintenance cost.

[0026] In addition, the structures of the primary side cavity and the secondary side cavity in the simulation platform design, as well as the detachable characteristics of the movable tube device, enable it to adapt to the characteristics of different types of steam generators, increasing the applicable range of the simulation platform. Moreover, the detachable movable tube device also allows the operating personnel to conduct simulation tests specifically for the equipment or actual operations related to the heat transfer tubes, improving the flexibility of use. Brief Description of the Drawings

[0027] By describing the exemplary embodiments of the present invention in more detail in conjunction with the accompanying drawings, the above and other objects, features, and advantages of the present invention will become more apparent. Among them, in the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.

[0028] Figure 1 is a schematic structural diagram of a simulation platform for a steam generator of a nuclear power unit in some embodiments of the present invention;

[0029] Figure 2 is viewed from a second angle Figure 1 a schematic structural diagram of the shown simulation platform for a steam generator of a nuclear power unit;

[0030] Figure 3 is an exploded view of a simulation platform for a steam generator of a nuclear power unit in some embodiments of the present invention;

[0031] Figure 4 is viewed from a third angle Figure 1 a schematic structural diagram of the shown simulation platform for a steam generator of a nuclear power unit;

[0032] Figure 5 is viewed from a fourth angle Figure 1 a schematic structural diagram of the shown simulation platform for a steam generator of a nuclear power unit;

[0033] Figure 6 is Figure 3 an enlarged view at A;

[0034] Figure 7 is Figure 4 an enlarged view at B;

[0035] Figure 8 is Figure 5 an enlarged view at C. Detailed Embodiments

[0036] Embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present utility model will be more thorough and complete, and will fully convey the scope of the present utility model to those skilled in the art.

[0037] It should be understood that although the terms "first", "second", "third", etc. may be used in the present utility model to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present utility model, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0038] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0039] Unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. 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.

[0040] Figures 1 to 5The nuclear power unit steam generator simulation platform 10 in some embodiments of the present utility model is shown. The nuclear power unit steam generator simulation platform 10 is used for maintenance personnel to conduct simulation practical operations related to the evaporator. The nuclear power unit steam generator simulation platform 10 includes a simulation mechanism 1, a support platform mechanism 2, a primary side simulation mechanism 3, and a secondary side simulation mechanism 4. The support platform mechanism 2 is arranged on the simulation mechanism 1. The support platform mechanism 2 is used to support the simulation mechanism 1 and can also provide a stable standing platform for maintenance personnel at the required height position. The primary side simulation mechanism 3 and the secondary side simulation mechanism 4 are respectively arranged on the simulation mechanism 1. The primary side simulation mechanism 3 is used to simulate the relevant structures on the primary side of the evaporator, and the secondary side simulation mechanism 4 is used to simulate the relevant structures on the secondary side of the evaporator.

[0041] As Figure 3 and Figure 4 shown, the simulation mechanism 1 includes a housing 11, a dividing tube sheet 12, and a movable tube device 13. The dividing tube sheet is arranged inside the housing 11, thereby dividing the housing 11 into a primary side cavity 111 and a secondary side cavity 112. The movable tube device 13 is detachably arranged on the dividing tube sheet 12 and is located inside the secondary side cavity 112.

[0042] It can be understood that the external dimensions and internal structure of the housing 11 need to be similar to those of the actually used steam generator to ensure the authenticity of the simulation. The internal space of the housing 11 is divided into a primary side cavity 111 and a secondary side cavity 112 by the dividing tube sheet 12. A plurality of holes are opened on the dividing tube sheet 12 for fixing the corresponding tube bundles. The movable tube device 13 is located inside the secondary side cavity 112. Although the movable tube device 13 is also used to simulate the tube body inside the evaporator, because the movable tube device 13 is configured to be detachable, the movable tube device 13 can not only be placed inside the housing 11 for testing or simulation, etc., but also be taken out separately for simulation training.

[0043] As Figure 2 shown, the support platform mechanism 2 includes a support device 21 and a stepping platform 22. The support device 21 is arranged on the housing 11, and the stepping platform 22 is arranged around the housing 11.

[0044] It can be understood that the support device 21 is fixed on the housing 11 to stabilize the entire simulation mechanism 1. The support device 21 can adopt the form of casters or fixed feet to meet the requirements of different training site needs. The stepping platform 22 is arranged around the housing 11, providing sufficient standing space for maintenance personnel and facilitating simulation operations. The stepping platform 22 can be connected to the ground through stairs, ladders, or elevators to ensure that maintenance personnel can easily reach the stepping platform 22.

[0045] As Figure 4 shown, the primary side simulation mechanism 3 includes a main pipe interface 31 and a manhole device 32. As Figures 1 to 4As shown in the figure, the main pipeline interface 31 and the manhole device 32 are both arranged on the housing 11 and are both connected to the primary side cavity 111; the secondary side simulation mechanism 4 includes a number of handhole devices 41, each handhole device 41 is arranged on the housing 11, and each handhole device 41 is connected to the secondary side cavity 112.

[0046] Understandably, the main pipeline interface 31 is arranged on one side of the housing 11 and is connected to the primary side cavity 111. It simulates the actual pipeline interface on the primary side of the steam generator, and maintenance personnel can perform connection and disassembly operation training through it. The manhole device 32 is also arranged on one side of the housing 11 and is connected to the primary side cavity 111. The manhole device 32 is used to simulate the manhole of the steam generator, and maintenance personnel can enter the primary side cavity 111 from here for inspection and maintenance simulation.

[0047] The handhole devices 41 are arranged at multiple positions on the housing 11 and are connected to the secondary side cavity 112. These handhole devices 41 are used to simulate various maintenance openings on the secondary side of the steam generator, and maintenance personnel can perform operation exercises through these holes, such as cleaning, inspecting or replacing the tube bundle, etc.

[0048] In summary, the steam generator simulation platform 10 of the nuclear power unit of the present utility model can provide a safe and efficient simulation training environment for maintenance personnel, and help them improve their maintenance skills and the ability to respond to emergencies.

[0049] As Figure 3 shown, in some embodiments of the steam generator simulation platform 10 of the nuclear power unit, the movable tube device 13 includes a lower fixing plate 131, an upper fixing plate 132 and a number of heat transfer tubes 133. The lower fixing plate 131 is detachably arranged on the partition tube plate 12. The lower fixing plate 131 and the upper fixing plate 132 are arranged in parallel at intervals. One end of each heat transfer tube 133 passes through the upper fixing plate 132, and the other end of each heat transfer tube 133 is arranged on the lower fixing plate 131. Both ends of each heat transfer tube 133 are open.

[0050] Understandably, the lower fixing plate 131 is fixed on the partition tube plate 12 in a detachable manner for fixing one end of the heat transfer tube 133. The connection between the lower fixing plate 131 and the partition tube plate 12 can adopt bolts, buckles or other suitable fastening methods to facilitate disassembly and reinstallation. The upper fixing plate 132 and the lower fixing plate 131 are arranged in parallel at intervals for fixing the other end of the heat transfer tube 133. The position of the upper fixing plate 132 corresponds to that of the lower fixing plate 131 to ensure that the heat transfer tubes 133 can pass through the upper and lower fixing plates correctly. Both ends of each heat transfer tube 133 are open. One end of the heat transfer tube 133 passes through the upper fixing plate 132 and is fixed thereon, and the other end is fixed on the lower fixing plate 131. The material of the heat transfer tube 133 should match the pipe material in the actual steam generator to ensure the authenticity and reliability of the simulation.

[0051] It should be noted that after the lower fixing plate 131 is removed from the partition tube sheet 12, the movable tube device 13 can be directly taken out of the housing 11, and the movable tube device 13 can be used alone for testing corresponding plugging tools, climbing tools or other special tools.

[0052] Such as Figure 3 and Figure 6 As shown, in some embodiments of the nuclear power plant steam generator simulation platform 10, the partition tube sheet 12 is provided with a profiling groove 121 on the surface facing the secondary side cavity 112, and an avoidance hole 122 communicating with the primary side cavity 111 is provided at the bottom of the profiling groove 121;

[0053] The movable tube device 13 further includes a plurality of fixing members 134. The lower fixing plate 131 is detachably arranged in the profiling groove 121. Each fixing member 134 passes through the lower fixing plate 131 and is fixed in the profiling groove 121. The ends of the heat transfer tubes 133 are exposed in the avoidance hole 122.

[0054] It can be understood that the profiling groove 121 is exposed in the secondary side cavity 112, and the avoidance hole 122 communicates from the bottom of the profiling groove 121 to the primary side cavity 111. The shape and size of the profiling groove 121 match the lower fixing plate 131 and are used to accommodate the lower fixing plate 131, so that the lower fixing plate 131 can be stably installed on the partition tube sheet 12. The setting of the avoidance hole 122 enables one end of the heat transfer tube 133 to pass through the partition tube sheet 12 and be exposed in the primary side cavity 111, simulating the arrangement of the heat transfer tubes in an actual steam generator. Each fixing member 134 is used to fix the lower fixing plate 131 in the profiling groove 121.

[0055] Such as Figure 4 As shown, in some embodiments of the nuclear power plant steam generator simulation platform 10, the main pipe interface 31 is in the shape of a cylinder with both ends open. One end of the main pipe interface 31 communicates with the primary side cavity 111, and the other end of the main pipe interface 31 inclines downward.

[0056] It can be understood that the main pipe interface 31 has a cylindrical structure with both ends open. One end of it is connected to the primary side cavity 111 and is used to simulate the main pipe interface on the primary side of an actual steam generator. The other end of the main pipe interface 31 inclines downward. Such a design helps to simulate the fluid flow direction in an actual steam generator. The downward inclination design can also help the simulation platform better discharge condensed water or other liquids to keep the inside of the simulation platform dry and clean. At the same time, the inclined pipe interface 31 is closer to the structure of an actual steam generator, which helps to improve the overall realism of the simulation platform, so that maintenance personnel can obtain more practical operation experience in simulation training.

[0057] Specifically, such asFigure 4 As shown, the main pipeline interface 31 is located below the housing 11.

[0058] As Figure 4 and Figure 7 shown, in some embodiments of the nuclear power unit steam generator simulation platform 10, the manhole device 32 includes a manhole flange 321, a manhole sealing plate 322, a manhole cover plate 323 and a plurality of manhole fixing members 324. One end of the manhole flange 321 communicates with the primary side cavity 111. The manhole sealing plate 322 covers the other end of the manhole flange 321. The manhole cover plate 323 covers the manhole sealing plate 322. Each manhole fixing member 324 passes through the manhole cover plate 323 and is fixed to the manhole flange 321, so that the manhole sealing plate 322 correspondingly seals between the manhole flange 321 and the manhole cover plate 323.

[0059] It can be understood that one end of the manhole flange 321 is connected and communicated with the primary side cavity 111, which is used to simulate the manhole interface in the actual steam generator. The manhole sealing plate 322 covers the other end of the manhole flange 321 to close the manhole flange 321 and ensure the sealing performance of the simulation platform. The manhole cover plate 323 covers the manhole sealing plate 322 to further close the manhole device 32 and is convenient for opening and closing at the same time. The manhole fixing member 324 is used to fix the manhole cover plate 323 on the manhole flange 321 to ensure the sealing performance between the manhole sealing plate 322 and the manhole cover plate 323. The manhole fixing member 324 passes through the manhole cover plate 323 and is connected to the manhole flange 321.

[0060] It should be noted that the design of the manhole sealing plate 322 and the manhole cover plate 323 ensures the sealing performance of the manhole device 32 and avoids leakage during the simulation training process. The detachable design of the manhole cover plate 323 enables maintenance personnel to easily open the manhole device 32 for inspection and maintenance. The manhole device 32 in this type of embodiment fully simulates the manhole structure of the actual steam generator and provides a near-real simulation environment for maintenance personnel.

[0061] As Figure 5 and Figure 8 shown, in some embodiments of the nuclear power unit steam generator simulation platform 10, each handhole device 41 includes a handhole flange 411, a handhole sealing plate 412, a handhole cover plate 413 and a handhole fixing member 414;

[0062] One end of each handhole flange 411 communicates with the secondary side cavity 112. Each handhole sealing plate 412 correspondingly covers the other end of each handhole flange 411. Each handhole cover plate 413 correspondingly covers the handhole sealing plate 412. The handhole fixing member 414 passes through the handhole cover plate 413 and is fixed to the handhole flange 411, so that the handhole sealing plate 412 correspondingly seals the mating gap between the handhole flange 411 and the handhole cover plate 413.

[0063] Understandably, one end of each manhole flange 411 is connected to the secondary side cavity 112, which is used to simulate the manhole interface in an actual steam generator. The manhole sealing plate 412 covers the other end of the manhole flange 411 to seal the manhole flange 411 and ensure the sealing performance of the simulation platform. The manhole cover plate 413 covers the manhole sealing plate 412 to further seal the manhole device 41 and facilitate opening and closing. The manhole fixing member 414 is used to fix the manhole cover plate 413 on the manhole flange 411 to ensure the sealing performance between the manhole sealing plate 412 and the manhole cover plate 413. The manhole fixing member 414 passes through the manhole cover plate 413 and is connected to the manhole flange 411.

[0064] It should be noted that the designs of the manhole sealing plate 412 and the manhole cover plate 413 ensure the sealing performance of the manhole device 41 and prevent leakage during the simulation training process. The detachable design of the manhole cover plate 413 enables maintenance personnel to easily open the manhole device 41 for inspection and maintenance. The setting of the manhole device 41 enables maintenance personnel to obtain more realistic simulation training and further improve their maintenance proficiency.

[0065] As Figure 2 and Figure 4 shown, in some embodiments of the steam generator simulation platform 10 of a nuclear power unit, the manhole flanges 411 are evenly spaced along the surface of the housing 11.

[0066] Understandably, the evenly spaced manhole flanges 411 enable maintenance personnel to conduct maintenance training from different positions; in particular, when the manhole positions on different types of evaporators are different, the corresponding simulation can be carried out through the manhole flanges 411 at different positions of the present utility model, improving the simulation pertinence.

[0067] As Figure 2 shown, in some embodiments of the steam generator simulation platform 10 of a nuclear power unit, the stepping platform 22 includes a stepped component 221, a platform component 222 and a plurality of legs 223. The stepped component 221 is inclined, and the top of the stepped component 221 is connected to the platform component 222. Each leg 223 is upright and the top of each leg 223 in the height extension direction is connected to the platform component 222.

[0068] Understandably, the ladder assembly 221 is inclined, facilitating maintenance personnel to easily climb from the ground to the platform assembly 222. The top of the ladder assembly 221 is connected to the platform assembly 222 to ensure the stability and safety of the structure. The platform assembly 222 surrounds the housing 11, providing a spacious standing space for maintenance personnel to facilitate simulation operations. The platform assembly 222 is connected to the top of the ladder assembly 221 to ensure that maintenance personnel can smoothly transition from the ladder to the platform. The legs 223 are vertically placed and evenly distributed below the platform assembly 222, and their tops are connected to the platform assembly 222 to ensure the overall stability and load-bearing capacity of the stepping platform 22. The height of the legs 223 can be adjusted as needed to adapt to different training sites and requirements.

[0069] It should be noted that the settings of the ladder assembly 221 and the platform assembly 222 ensure the safety of maintenance personnel when climbing and standing. It also improves the convenience of simulation training.

[0070] As Figure 2 shown, in some embodiments of the nuclear power plant steam generator simulation platform 10, the ladder assembly 221 includes side beams 2211 and a number of step plates 2212. The side beams 2211 are inclined and connected to the platform assembly 222, and the step plates 2212 are arranged at intervals one by one along the length extension direction of the side beams 2211.

[0071] Understandably, the side beams 2211 are inclined for connecting the platform assembly 222 and the ground. The design of the side beams 2211 ensures the stability and safety of the structure and provides support for the step plates 2212 at the same time. The step plates 2212 are arranged at intervals one by one along the length extension direction of the side beams 2211, providing a path for maintenance personnel to climb to the platform assembly 222. The number and spacing of the step plates 2212 can be adjusted as needed to adapt to different usage requirements.

[0072] The platform assembly 222 surrounds the housing 11, enabling maintenance personnel to perform simulation operations from different angles and improving the flexibility of simulation operations.

[0073] As Figure 2 shown, in some embodiments of the nuclear power plant steam generator simulation platform 10, the platform assembly 222 includes a platform fence 2221 and a number of platform treads 2222. At least part of the platform treads 2222 are connected one by one along the outer circumference of the housing 11, and the platform fence 2221 is arranged at the edge of each platform tread 2222 away from the housing 11.

[0074] Understandably, the platform railing 2221 is provided at the edge of the platform pedal 2222 away from the housing 11 to ensure the safety of maintenance personnel on the platform and prevent accidental falls. At least part of the platform pedal 2222 is connected one by one along the outer circumference of the housing 11, providing a spacious standing space for maintenance personnel and facilitating simulation operations. The number and distribution of the platform pedals 2222 can be adjusted according to needs to adapt to different usage requirements.

[0075] As Figure 5 shown, in some embodiments of the steam generator simulation platform 10 of a nuclear power unit, the support device 21 includes three support columns 211 and three support blocks 212. Each support block 212 is correspondingly arranged at the top of each support column 211, and the three support blocks 212 respectively abut against the housing 11. One of the support columns 211 is located between the main pipe interface 31 and the manhole device 32.

[0076] Understandably, the support columns 211 are used to support the weight of the entire simulation mechanism 1 to ensure its stability and safety. The support blocks 212 are used to increase the support area, disperse the weight, and improve the overall stability.

[0077] Implementing the present utility model has the following beneficial effects:

[0078] The present utility model relates to a steam generator simulation platform for a nuclear power unit. By simulating the structure and working environment of a real steam generator, maintenance personnel can conduct repeated practical training on the simulation platform, thereby significantly improving their maintenance skills and the ability to respond to emergencies. On the other hand, it also allows maintenance personnel to perform operation exercises in a safe and controllable environment, avoiding the risks that may be brought about by directly operating on actual equipment and reducing the accident probability caused by human errors.

[0079] Furthermore, through the design of the primary side simulation mechanism and the secondary side simulation mechanism, the present utility model can simulate a variety of common fault scenarios, which helps maintenance personnel become familiar with different types of fault manifestation forms, thereby improving their fault diagnosis and handling speed. It enables maintenance personnel to proficiently master the necessary operation procedures and technical key points before formal maintenance, effectively shortening the time required for actual maintenance and improving work efficiency. At the same time, through simulation training, the number of incorrect operations on actual equipment is reduced, not only protecting the expensive steam generator from damage, but also reducing unnecessary material losses, thereby reducing the overall maintenance cost.

[0080] In addition, the primary side cavity and secondary side cavity structures in the simulation platform design, as well as the detachable characteristics of the movable tube device, enable it to adapt to the characteristics of different types of steam generators, increasing the applicable range of the simulation platform. Moreover, the detachable movable tube device also allows the operating personnel to conduct simulation tests specifically for the equipment or actual operations related to the heat transfer tubes, improving the flexibility of use.

[0081] The solution of the present utility model has been described in detail with reference to the accompanying drawings above. In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily essential to the present utility model. In addition, it can be understood that the steps in the method embodiments of the present utility model can be adjusted, combined, and deleted according to actual needs, and the modules in the device embodiments of the present utility model can be combined, divided, and deleted according to actual needs.

[0082] The embodiments of the present utility model have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, the actual application, or the improvement of the technology in the market, or to enable other ordinary skilled persons in the technical field to understand the embodiments disclosed herein.

Claims

1. A nuclear power unit steam generator simulation platform, characterized in that: include: The simulation mechanism comprises a shell, a partition tube plate and a movable tube device, wherein the partition tube plate is arranged in the shell to divide the shell into a primary side cavity and a secondary side cavity, and the movable tube device is detachably arranged on the partition tube plate and is located in the secondary side cavity; A support platform mechanism, comprising a support device and a stepping platform, wherein the support device is arranged on the shell, and the stepping platform is arranged around the shell; A primary side simulation mechanism, comprising a main pipeline interface and a manhole device, wherein the main pipeline interface and the manhole device are both arranged on the shell and are both connected to the primary side cavity; and The secondary side simulation mechanism comprises a plurality of hand hole devices, each of which is arranged on the shell, and each of which is connected to the secondary side cavity.

2. The nuclear power unit steam generator simulation platform according to claim 1, characterized in that: The movable tube device includes a lower fixed plate, an upper fixed plate and a plurality of heat transfer tubes. The lower fixed plate is detachably arranged on the partition tube plate. The lower fixed plate and the upper fixed plate are arranged in parallel and spaced apart. One end of each heat transfer tube is passed through the upper fixed plate, and the other end of each heat transfer tube is arranged on the lower fixed plate. Both ends of each heat transfer tube are open.

3. The nuclear power unit steam generator simulation platform according to claim 2, characterized in that: The partition tube plate is provided with a profiling groove on the surface facing the secondary side cavity, and a avoidance hole communicating with the primary side cavity is provided at the bottom of the profiling groove; The movable tube device also includes a plurality of fixing parts. The lower fixing plate is detachably arranged in the profiling groove. Each of the fixing parts passes through the lower fixing plate and is fixed in the profiling groove. The ends of each of the heat transfer tubes are exposed in the avoidance hole.

4. The nuclear power unit steam generator simulation platform according to claim 1, characterized in that: The main pipeline interface is in the shape of a cylinder with two ends open, one end of the main pipeline interface is connected to the primary side cavity, and the other end of the main pipeline interface is tilted downward; and / or The main pipeline interface is located below the shell.

5. The nuclear power unit steam generator simulation platform according to claim 1 or 4, characterized in that: The manhole device includes a manhole flange, a manhole sealing plate, a manhole cover plate and a plurality of manhole fixings. One end of the manhole flange is connected to the primary side cavity, the manhole sealing plate is covered on the other end of the manhole flange, and the manhole cover plate is covered on the manhole sealing plate. Each of the manhole fixings passes through the manhole cover plate and is fixed on the manhole flange, so that the manhole sealing plate corresponds to sealing between the manhole flange and the manhole cover plate.

6. The nuclear power unit steam generator simulation platform according to claim 1, characterized in that: Each of the hand hole devices comprises a hand hole flange, a hand hole sealing plate, a hand hole cover plate and a hand hole fixing piece; One end of each of the hand hole flanges is connected to the secondary side cavity, each of the hand hole sealing plates is correspondingly covered on the other end of each of the hand hole flanges, each of the hand hole cover plates is correspondingly covered on the hand hole sealing plates, and the hand hole fixing parts are all passed through the hand hole cover plates and fixed on the hand hole flanges, so that the hand hole sealing plates correspond to seal the fitting gap between the hand hole flanges and the hand hole cover plates.

7. The nuclear power unit steam generator simulation platform according to claim 6, characterized in that: The hand hole flanges are evenly spaced along the surface of the shell.

8. The nuclear power unit steam generator simulation platform according to claim 1, characterized in that: The stepping platform includes a step assembly, a platform assembly and a plurality of legs. The step assembly is tilted and the top of the step assembly is connected to the platform assembly. Each of the legs is upright and each of the legs is connected to the platform assembly at the top in the height extension direction.

9. The nuclear power unit steam generator simulation platform according to claim 8, characterized in that: The ladder assembly comprises a side beam and a plurality of step plates, the side beam is arranged obliquely and connected to the platform assembly, and the step plates are arranged one by one at intervals along the length extension direction of the side beam; and / or The platform assembly includes a platform fence and a plurality of platform pedals, at least some of which are connected one by one around the outer side of the circumference of the shell, and the platform fence is arranged on the edge of each platform pedal away from the shell.

10. The nuclear power unit steam generator simulation platform according to claim 1, characterized in that: The support device includes three support columns and three support blocks, each of the support blocks is arranged on the top of each of the support columns in a one-to-one correspondence, and the three support blocks are respectively supported on the shell, and one of the support columns is located between the main pipeline interface and the manhole device.

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