A method of modular construction of a nuclear power plant

Abstract

The application provides a modular construction method for a nuclear power plant, comprising: dividing a nuclear island plant from top to bottom into multiple modules, and manufacturing frames respectively; after a first layer of formed modules is formed by pouring, a first lapping platform is built on one side of the first layer of formed modules, a second layer of frame modules is lifted to the first lapping platform, and then is transported to the first layer of formed modules by the first lapping platform to be poured to form a second layer of formed modules; a second lapping platform is built on the first lapping platform and is flush with the second layer of formed modules; a third layer of frame modules is first lifted to the first lapping platform, then is lifted to the second lapping platform by the first lapping platform, and then is transported to the second layer of formed modules by the second lapping platform to be poured to form a third layer of formed modules; and the process is repeated until the construction of all modules is completed. The application can realize the vertical construction of large modules of the nuclear power plant, thereby significantly improving the scale and completion of the nuclear power plant modules and reducing the construction period of the nuclear power plant.

Description

Technical Field

[0001] This invention specifically relates to a modular construction method for nuclear power plants. Background Technology

[0002] Modular technology is an advanced design and construction technology. Applying it to the design and construction of nuclear power plants can significantly reduce on-site construction work, reduce safety hazards, shorten construction time, and reduce project costs. It is an effective means to improve the design and construction technology of nuclear power plants. Major international nuclear power suppliers have applied modular technology to varying degrees in their respective nuclear reactor designs. For example, the ABWR reactor, jointly developed by Toshiba and Hitachi in Japan, achieved large-scale application of modular technology during construction, with units 6 and 7 of the Kashiwazaki-Kariwa nuclear power plant achieving a construction cycle (FCD to FLD) of 37 months. The ATMEA1, jointly developed by Mitsubishi Heavy Industries and Areva in Japan, and the APR1400 from Korea Electric Power Corporation also widely adopted modular technology, with target construction cycles (FCD to FLD) of 40 months and 41.5 months, respectively. The AP1000, developed by Westinghouse in the early 1990s, extensively used modular technology, designing over 350 modules of different sizes and architecture levels, shortening the target construction cycle to 36 months (FCD to FLD). Furthermore, the Mk1 PB-FHR, the latest pebble bed lava reactor designed by the University of California, Berkeley, utilizes even more advanced modular technology, with the entire nuclear island composed of 10 large modules, further shortening the construction cycle (Note: Mk1 has a power output of 100 MWe).

[0003] While modular design and construction technologies for nuclear power plants have reached maturity, with modular technologies exemplified by AP1000 achieving significant breakthroughs in module complexity and application breadth, the AP1000 demonstration project failed to achieve its 36-month (FCD-FLD) target in modular engineering practice. Even the optimized shortest total construction period remained at 48 months (FCD-FLD), with a total construction period of 52 months. The advantage of modular technology in shortening the construction period was not only not significant, but in fact, situations arose where traditional reinforced concrete structures resulted in shorter construction periods for the same amount of work.

[0004] One of the main reasons for this phenomenon is that the "completion" of individual modules is still relatively low, failing to fundamentally change the traditional construction sequence. For example, AP1000 has more than 350 modules, which are clearly divided into structural modules and equipment modules. The structural modules are further subdivided into structural modules, formwork modules, steel structure modules, stair modules, etc., while the equipment modules include mechanical modules and piping modules, etc. There is no integrated functional module that combines structural modules and equipment modules.

[0005] Looking back at the development of modular design and construction technology for nuclear power plants, from the modular hoisting and construction of the containment steel-lined dome to the large-scale application of AP1000 modular technology, and then to the composite module design of APR1400, nuclear power modular technology has been developing towards larger scale and more complex designs. We can conclude that the future development trend of nuclear power modular technology will continue to be the further expansion of the breadth and depth of modules. The scale of individual modules will become larger and larger, and the completeness of functions will become stronger and stronger. The ultimate goal is to achieve a construction similar to large-scale segmented construction of ships, obtaining the minimum construction cycle and flexible user choices.

[0006] From the development trend of nuclear power modular technology and the difficulties encountered in the modular design and construction practice of AP1000, we can see that current nuclear power modular technology still suffers from problems such as small module size and low completion rate, i.e., "not large and not complete." The most significant constraint affecting the "larger and more complete" development of nuclear power modules is the hoisting and placement of large modules. The current crane hoisting and placement methods used in modular construction are greatly affected by factors such as the lifting capacity of large crawler cranes, their location, and clearance height. The overall weight of large nuclear power plant modules has already reached the limit of the lifting capacity of heavy-duty cranes. Furthermore, from the perspective of the development history of nuclear power plant design and construction technology, the development of large crane technology has had a tremendous impact on nuclear power plant construction methods. Figure 1 This demonstrates the impact of crane lifting capacity on the construction methods of nuclear power plant containment structures. Although the lifting capacity of large crawler cranes used in nuclear power plant construction has increased from several hundred tons to 5,000 tons (UK HPC project), this limitation on the weight, size, shape, and location of modules makes the crane-lifting method for module placement a constraint on the development of modular nuclear power technology. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art by providing a modular construction method for nuclear power plants, which can significantly improve the scale and completion of nuclear power plant modules, thereby improving the level of modular design and construction of nuclear power plants, significantly reducing the construction cycle of nuclear power plants, and improving economic efficiency.

[0008] The technical solution adopted to solve the technical problem of this invention is:

[0009] This invention provides a modular construction method for nuclear power plants, comprising:

[0010] The nuclear island building was divided into multiple modules from top to bottom, and the frames of each module were manufactured separately to obtain multiple frame modules.

[0011] After the first-layer frame module is transported to the construction site, it is poured to form the first-layer molded module.

[0012] A first overlapping platform, flush with the first-layer molding module, is constructed on one side. The second-layer frame module is then lifted onto the first overlapping platform, transported via the first overlapping platform to the first-layer molding module, and poured to form the second-layer molding module.

[0013] A second overlapping platform, flush with the second-layer molding module, is constructed on the first overlapping platform. The third-layer frame module is first lifted onto the first overlapping platform, then lifted onto the second overlapping platform, and finally transported onto the second-layer molding module via the second overlapping platform for casting, thus forming the third-layer molding module.

[0014] This process continues until all modules are completed.

[0015] Optionally, a lifting and translating device is used to lift the frame module, the lifting and translating device comprising:

[0016] The mobile mechanism and support platform, wherein the support platform is used to support the frame module,

[0017] The mobile mechanism includes a self-propelled vehicle, a climbing pole, and a climbing drive unit.

[0018] The climbing pole passes through the support platform, its lower end is connected to the self-propelled vehicle, and its upper end protrudes from the frame module. The climbing drive unit is connected to the support platform and is used to drive the support platform to move up and down relative to the climbing pole, or to drive the climbing pole to move up and down relative to the support platform. The self-propelled vehicle is used to drive the lifting and translating device to move horizontally.

[0019] The lifting and translating device is used to lift the frame module, specifically including:

[0020] S1: The lifting and translating device moves the upper frame module to the corresponding overlapping platform by starting the self-propelled vehicle.

[0021] S2: The climbing drive unit propels the support platform upwards on the climbing pole until the distance between the bottom of the support platform and the connecting platform is greater than or equal to the height of a self-propelled vehicle.

[0022] S3: Lift the first row of unlifted climbing poles in the lateral direction of the lifting and lateral movement device until the bottom surface of the self-propelled vehicle connected to this row of climbing poles is flush with the top surface of the overlapping platform. Then, move the lifting and lateral movement device forward until the self-propelled vehicle connected to this row of climbing poles is supported on the top surface of the overlapping platform.

[0023] S4: Repeat step S3 until all the self-propelled vehicles are supported on the top surface of the platform.

[0024] Optionally, the lifting and translating device is used to transport the upper frame module to the lower forming module via the overlapping platform, specifically including:

[0025] S5: The lifting and translating device moves forward to the next layer of molding module, and a lifting mechanism is set between the next layer of molding module and the upper layer of frame module to lift the upper layer of frame module to detach it from the support platform. Then the climbing pole is removed, and the self-propelled vehicle is connected to the support platform. The lifting and translating device moves backward until it is withdrawn from between the next layer of molding module and the upper layer of frame module.

[0026] S6: The lifting and translating device continues to move backward until the first row of self-propelled vehicles that have not yet descended in the direction of the lifting and translating device's backward movement are suspended in the air. After passing the climbing pole through the support platform, connect it to the suspended self-propelled vehicles, and then disconnect the suspended self-propelled vehicles from the support platform. Lower the climbing pole until the self-propelled vehicles connected to it touch the ground / are supported on the next layer of overlapping platform.

[0027] S7: Repeat step S6 until all self-propelled vehicles are on the ground / supported on the next layer of the overlapping platform.

[0028] S8: The lifting mechanism retracts into the next layer molding module and / or the previous layer frame module, so that the previous layer frame module is supported on the next layer molding module.

[0029] Optionally, the method further includes the following steps before step S3:

[0030] Install the first lap car on the bottom surface of the leading edge of the support platform and support it on the lap platform;

[0031] Between step S3 and step S4, the following is also included:

[0032] The first connecting vehicle installed on the bottom of the front edge of the support platform is dismantled.

[0033] Optionally, the step of mounting the first connecting vehicle on the bottom surface of the leading edge of the support platform and supporting it on the connecting platform specifically includes:

[0034] The lifting and translating device moves forward until the front edge of the support platform extends into the upper space of the overlapping platform, detachably connecting the first overlapping vehicle, which is supported on the overlapping platform and located below the front edge of the support platform, to the support platform.

[0035] Optionally, in step S4, before lifting the last row of unlifted climbing poles in the forward direction of the lifting and translating device, the following steps are also included:

[0036] Install the second connecting vehicle on the bottom surface of the support platform between the last two rows of climbing poles, and support it on the connecting platform;

[0037] Between step S6 and step S7, the following is also included:

[0038] Remove the second connecting vehicle installed on the bottom of the support platform.

[0039] Optionally, the step of installing a second connecting vehicle on the bottom surface of the support platform at a position between the last two rows of climbing poles, and supporting it on the connecting platform, specifically includes:

[0040] The lifting and translating device moves forward to the upper space of the support platform where the second connecting vehicle is to be installed, and detachably connects the second connecting vehicle, which is supported on the connecting platform and located below the part of the support platform where the second connecting vehicle is to be installed, to the support platform.

[0041] Optionally, in step S7, before lowering the last row of unraised climbing poles in the forward direction of the lifting and translating device, the following steps are also included:

[0042] Install a third connecting vehicle on the bottom surface of the leading edge of the supporting platform and support it on the connecting platform;

[0043] In step S7, after all the self-propelled vehicles have touched the ground, the following is also included:

[0044] Remove the third connecting vehicle installed on the bottom of the support platform.

[0045] Optionally, the top surface of the next-layer molding module and / or the bottom surface of the previous-layer frame module have a receiving groove capable of accommodating the retracted lifting mechanism.

[0046] In step S5, setting a lifting mechanism between the lower molding module and the upper frame module specifically includes:

[0047] A lifting mechanism is provided in the receiving groove;

[0048] In step S8, the lifting mechanism retracts into the next layer forming module and / or the previous layer frame module, specifically including:

[0049] The lifting mechanism retracts into the receiving slot.

[0050] Optionally, the top surface of the upper frame module has a first channel communicating with the receiving slot, and the lifting mechanism can be fed into the receiving slot through the first channel, or moved out of the receiving slot through the first channel.

[0051] Optionally, the climbing drive unit includes multiple jacks arranged in a circumferential pattern around the climbing pole. The jacks are fixedly connected to the support platform and provide supporting power to the platform.

[0052] The jack repeats the sequence of actions: one of its fixed part and telescopic part is fixed to the climbing pole, the other is disconnected from the climbing pole, the jack extends or retracts, one of its fixed part and telescopic part is disconnected from the climbing pole, the other is fixed to the climbing pole, and the jack resets, so that the support platform rises or falls relative to the climbing pole, or the climbing pole rises or falls relative to the support platform.

[0053] Optionally, the support platform is provided with a mounting hole, the climbing pole passes through the mounting hole through the support platform, and the climbing drive unit is located in the mounting hole.

[0054] Optionally, the translating mechanism of the lifting and translating device has two rows, which are arranged in parallel and located on both sides of the longitudinal center plane of the upper frame module.

[0055] Each overlapping platform includes two parallel walls. The two walls of the first overlapping platform are built on the site of the turbine building and correspond one-to-one with the two opposite walls to be built on the turbine building, as well as the two rows of translation mechanisms of the lifting and translation device. The two walls of the upper overlapping platform are located on the two walls of the lower overlapping platform and correspond one-to-one with the two walls of the lower overlapping platform.

[0056] After the nuclear island plant was completed, the connecting platform on the turbine plant site was dismantled and rebuilt to form the two walls of the turbine plant.

[0057] The nuclear island building includes a containment structure and auxiliary buildings, which are arranged sequentially along the translation direction of the jacking and translation device.

[0058] The process of dividing the nuclear island plant into multiple modules from top to bottom and manufacturing the frames for each module to obtain multiple frame modules specifically includes:

[0059] The auxiliary plant is divided into n auxiliary plant modules from top to bottom, and the containment structure is divided into n+1 containment modules from top to bottom. The frames are manufactured separately to obtain n auxiliary plant frame modules and n+1 containment frame modules. The m-th auxiliary plant frame module and the m-th containment frame module are set at the same height. n≥2, m≥1.

[0060] The process of transporting the first-layer frame module to the construction site and then pouring it to form the first-layer molded module specifically includes:

[0061] The first-layer containment frame module and the first-layer auxiliary plant frame module were transported to the corresponding construction sites and then poured to obtain the first-layer containment molding module and the first-layer auxiliary plant molding module.

[0062] The process involves constructing a first overlapping platform flush with the first-layer molding module, lifting the second-layer frame module onto the first overlapping platform, transporting it via the first overlapping platform to the first-layer molding module, and then casting it to form the second-layer molding module. Specifically, this includes:

[0063] On the turbine plant site, a first overlapping platform is constructed, flush with the first-layer containment molding module, and extends to connect with the first-layer auxiliary plant molding module. The second-layer containment frame module is first lifted onto the first overlapping platform, and then transported to the first-layer containment molding module via the first overlapping platform and the first-layer auxiliary plant molding module. Then, the second-layer auxiliary plant frame module is lifted onto the first overlapping platform, and then transported to the first-layer auxiliary plant molding module via the first overlapping platform, and cast to form the second-layer containment molding module and the second-layer auxiliary plant molding module.

[0064] The process involves constructing a second overlapping platform flush with the second-layer molding module on the first overlapping platform, then lifting the third-layer frame module onto the first overlapping platform, then onto the second overlapping platform, and finally transporting it onto the second-layer molding module for casting to form the third-layer molding module. Specifically, this includes:

[0065] A second overlapping platform is constructed on the first overlapping platform, flush with the second-layer containment molding module, and extends to connect with the second-layer auxiliary building molding module. The third-layer containment frame module is first lifted onto the first overlapping platform, then lifted onto the second overlapping platform, and then transported to the second-layer containment molding module via the second overlapping platform and the second-layer auxiliary building molding module. The third-layer auxiliary building frame module is then first lifted onto the first overlapping platform, then lifted onto the second overlapping platform, and then transported to the second-layer auxiliary building molding module via the second overlapping platform, where it is poured to form the third-layer containment molding module and the third-layer auxiliary building molding module.

[0066] This process continues in the same manner until the construction of all modules is completed, specifically including:

[0067] This process continues until the construction of the nth containment building module and the nth auxiliary building module is completed. Then, the (n+1)th containment frame module is lifted sequentially along the first overlapping platform, the second overlapping platform, ... the nth overlapping platform, and then transported to the nth containment building module via the nth overlapping platform and the nth auxiliary building module. The module is then poured to form the (n+1)th containment building module.

[0068] Optionally, it also includes:

[0069] Complete the construction of the steam turbine plant and auxiliary plant.

[0070] Optionally, the top surface of the support platform is provided with a through slot, which extends along the translational direction of the support platform and is used for the lifting mechanism to pass through. The through slot includes a first through slot, a second through slot, ..., an Nth through slot, sequentially distributed along the translational direction of the support platform. The first through slot penetrates the front side of the support platform in the translational direction, the Nth through slot penetrates the rear side of the support platform in the translational direction, and N≥2.

[0071] The distance between the central axis of the lifting mechanism rising from the front end of the (M+1)th through slot and the front side of the support platform is less than or equal to the distance between the central axis of the lifting mechanism rising from the rear end of the Mth through slot and the front side of the support platform, where M ≥ 1.

[0072] The specific process of step S5 includes:

[0073] S5.1: The lifting and translating device moves forward to the next layer of forming module.

[0074] S5.2: A lifting mechanism is installed between the next layer molding module and the bottom surface of the support platform. The lifting mechanism includes a first lifting mechanism and a second lifting mechanism, which are distributed at intervals along the circumference of the support platform. The second lifting mechanism rises from the Nth through slot to lift the rear edge of the bottom surface of the large module. The first lifting mechanism is located between the destination and the front edge of the bottom surface of the support platform. A first group of first lifting mechanisms rises from the first through slot to lift the front edge of the bottom surface of the large module, so that the large module is lifted to the point of detachment from the support platform.

[0075] S5.3: Remove the climbing pole and connect the self-propelled vehicle to the support platform.

[0076] S5.5: The lifting and translating device begins to translate to withdraw from between the upper frame module and the lower molding module. When the first lifting mechanism of the first group is located at the rear end of the first through slot, the second lifting mechanism of the first group passes through the second through slot to lift the front edge of the bottom of the upper frame module. At the same time, the first lifting mechanism of the first group descends below the bottom surface of the support platform, so that the lifting and translating device can continue to withdraw. This process continues until the Nth lifting mechanism of the first group passes through the Nth through slot to lift the front edge of the bottom of the upper frame module, thus completing the withdrawal of the lifting and translating device from the destination and the upper frame module.

[0077] Optionally, the two ends of the upper frame module perpendicular to the translation direction of the support platform extend outward relative to the support platform.

[0078] Step S5.2 further includes: setting up a third lifting mechanism between the bottom surfaces of the lower molding module and the upper frame module at one end perpendicular to the translation direction of the support platform, and setting up a fourth lifting mechanism between the bottom surfaces of the lower molding module and the upper frame module at the other end perpendicular to the translation direction of the support platform.

[0079] Optionally, the Mth through slot and the Mth-to-last through slot are set up correspondingly, M≥1, and the Mth through slot and the Mth-to-last through slot share a set of first lifting mechanisms.

[0080] Optionally, multiple first through slots, second through slots, ..., Nth through slots are provided, and the multiple through slots of each type are arranged at intervals along a direction perpendicular to the translation of the support platform.

[0081] Furthermore, the pattern of multiple through slots of each type projected onto the upper surface of the support platform is symmetrical about the diameter of the upper surface of the support platform parallel to its translation direction.

[0082] Optionally, the support platform includes a support platform body and multiple support arms, the support arms being rotatably connected to the edge of the support platform body, and the multiple support arms being arranged at circumferential intervals along the support platform body.

[0083] Multiple support arms can rotate around their respective hinge points to an extended state, so that the multiple support arms and the support platform body constitute the support structure of the support frame module;

[0084] Multiple support arms can also be lifted by the lifting mechanism arranged on the bottom edge of the frame module to detach from the support platform, and then rotate around their respective hinge points to the retracted state. When multiple support arms are in the retracted state, the lifting and translation device can be withdrawn from between the lower layer molding module and the upper layer frame module.

[0085] or,

[0086] The support platform includes two support units, which are arranged in parallel along the translational direction of the support platform and symmetrical about the longitudinal center plane of the upper frame module. Two corresponding moving mechanisms are provided, each corresponding to one of the two support units.

[0087] Each support unit includes a support platform body and multiple support arms. The support arms are rotatably connected to the edge of the corresponding support platform body, and the multiple support arms are arranged at circumferential intervals along the corresponding support platform body.

[0088] Multiple support arms can rotate to an extended state around their respective hinge points, so that the multiple support arms and two support platform bodies constitute the support structure of the support frame module;

[0089] Multiple support arms can also be lifted by the lifting mechanism arranged on the bottom edge of the frame module to detach from the support platform, and then rotate around their respective hinge points to the retracted state. When multiple support arms are in the retracted state, the lifting and translation device can be withdrawn from between the lower layer molding module and the upper layer frame module.

[0090] The specific process of step S5 includes:

[0091] S5.1: The lifting and translating device moves forward to the next layer of forming module.

[0092] S5.2: A lifting mechanism is installed between the bottom edge of the lower-level molding module and the upper-level frame module. The lifting mechanism lifts the upper-level frame module to a position detached from the support platform, and multiple support arms rotate around their respective hinge points to a retracted state.

[0093] S5.3: Remove the climbing pole and connect the self-propelled vehicle to the support platform body.

[0094] S5.4: The lifting and translating device is translated to remove itself from between the upper frame module and the lower molding module.

[0095] Optionally, multiple lifting mechanisms are provided, and the multiple lifting mechanisms are distributed circumferentially at intervals along the upper frame module.

[0096] This invention transforms the conventional hoisting and positioning method for large nuclear power plant modules into a step-by-step lifting and horizontal movement method. This overcomes the limitations of crane lifting capacity on module size and weight, significantly improving the scale and completion of nuclear power plant modules, thereby enhancing the modular design and construction level of nuclear power plants, significantly reducing the construction cycle of nuclear power plants, and improving economic efficiency. Attached Figure Description

[0097] Figure 1 This is a construction flowchart of the modular construction method for nuclear power plants provided in Embodiment 1 of the present invention;

[0098] Figure 2 This is a schematic diagram of the modular construction method for nuclear power plants provided in Embodiment 1 of the present invention;

[0099] Figure 3 This is a schematic diagram of the lifting and translation device provided in Embodiment 1 of the present invention;

[0100] Figure 4 A schematic diagram of the structure for the lifting and translating device to transport large modules;

[0101] Figure 5 A schematic diagram showing a large module being lifted by a transfer device;

[0102] Figure 6 This is a schematic diagram showing the first connected vehicle after installation;

[0103] Figure 7 This is a diagram illustrating the lifting of the front-row pole climber and the self-propelled vehicle.

[0104] Figure 8 This is a schematic diagram showing the second connecting vehicle after installation;

[0105] Figure 9 This is a schematic diagram showing the placement of a large module.

[0106] Figure 10 A schematic diagram illustrating how a lifting mechanism lifts a large module to a position detached from the support platform;

[0107] Figure 11 This is a schematic diagram showing the situation after the climbing poles have been removed.

[0108] Figure 12 This is a schematic diagram showing the device retracting to the rear of the self-propelled vehicle and becoming suspended in the air.

[0109] Figure 13 This is a schematic diagram showing the rear climbing poles after installation.

[0110] Figure 14 This is a diagram showing the rear climbing poles being lowered.

[0111] Figure 15 This is a diagram showing the dismantling of the second connecting vehicle;

[0112] Figure 16 A schematic diagram showing the third connecting vehicle after installation;

[0113] Figure 17 This is a schematic diagram showing the front row of climbing poles after installation.

[0114] Figure 18 A schematic diagram showing the lifting and translation device retracting onto the next level track;

[0115] Figure 19 A schematic diagram illustrating the lifting mechanism lowering a larger module from one level to the next.

[0116] Figure 20 This is a schematic diagram showing the lifting mechanism after it has been removed.

[0117] Figure 21 This is a schematic diagram of the lifting mechanism installation.

[0118] Figure 22 This is a schematic diagram of the support platform provided in Embodiment 1 of the present invention;

[0119] Figure 23 This is a schematic diagram of the withdrawal of the support platform provided in Embodiment 1 of the present invention;

[0120] Figure 24 This is a schematic diagram of the support platform provided in Embodiment 2 of the present invention;

[0121] Figure 25 This is a schematic diagram of the withdrawal of the support platform provided in Embodiment 2 of the present invention. Detailed Implementation

[0122] The technical solutions of the invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without creative effort are within the scope of the invention.

[0123] In the description of this invention, it should be noted that the use of terms such as "above" to indicate orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings and is only for the purpose of facilitating and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0124] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0125] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "setting," "installation," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0126] This invention provides a modular construction method for nuclear power plants, comprising:

[0127] The nuclear island building was divided into multiple modules from top to bottom, and the frames of each module were manufactured separately to obtain multiple frame modules.

[0128] After the first-layer frame module is transported to the construction site, it is poured to form the first-layer molded module.

[0129] A first overlapping platform, flush with the first-layer molding module, is constructed on one side. The second-layer frame module is then lifted onto the first overlapping platform, transported via the first overlapping platform to the first-layer molding module, and poured to form the second-layer molding module.

[0130] A second overlapping platform, flush with the second-layer molding module, is constructed on the first overlapping platform. The third-layer frame module is first lifted onto the first overlapping platform, then lifted onto the second overlapping platform, and finally transported onto the second-layer molding module via the second overlapping platform for casting, thus forming the third-layer molding module.

[0131] This process continues until all modules are completed.

[0132] Example 1:

[0133] like Figure 1 As shown, this embodiment provides a modular construction method for nuclear power plants, including:

[0134] The nuclear island building was divided into multiple modules from top to bottom, and the frames of each module were manufactured separately to obtain multiple frame modules.

[0135] After the first-layer frame module is transported to the construction site, it is poured to form the first-layer molded module.

[0136] A first overlapping platform, flush with the first-layer molding module, is constructed on one side. The second-layer frame module is then lifted onto the first overlapping platform, transported via the first overlapping platform to the first-layer molding module, and poured to form the second-layer molding module.

[0137] A second overlapping platform, flush with the second-layer molding module, is constructed on the first overlapping platform. The third-layer frame module is first lifted onto the first overlapping platform, then lifted onto the second overlapping platform, and finally transported onto the second-layer molding module via the second overlapping platform for casting, thus forming the third-layer molding module.

[0138] This process continues until all modules are completed.

[0139] Therefore, this invention transforms the conventional hoisting and positioning method for large nuclear power plant modules into a step-by-step lifting and horizontal movement positioning method, thereby breaking through the limitations of crane lifting capacity on module size and weight, significantly improving the scale and completion of nuclear power plant modules, thereby enhancing the modular design and construction level of nuclear power plants, significantly reducing the construction cycle of nuclear power plants, and improving economic efficiency.

[0140] In this embodiment, the translating mechanism of the lifting and translating device has two rows, which are arranged in parallel and located on both sides of the longitudinal center plane of the upper frame module 3.

[0141] like Figure 2 As shown,

[0142] Each overlapping platform includes two parallel walls. The two walls of the first overlapping platform are built on the site of the turbine building and correspond one-to-one with the two opposite walls to be built in the turbine building, as well as the two rows of translation mechanisms of the lifting and translation device. The two walls of the upper overlapping platform are set on the two walls of the lower overlapping platform 6 and correspond one-to-one with the two walls of the lower overlapping platform 6.

[0143] In this embodiment, specifically, the nuclear island building includes: a containment structure and auxiliary buildings. The containment structure, auxiliary buildings, and turbine building are arranged sequentially along the translation direction of the jacking and translation device. The containment structure includes the containment and its surrounding facilities. The above-mentioned modular construction method for nuclear power plants specifically includes:

[0144] 1) The application of super modularity is considered in the early stage of power plant design, and the specific design work of nuclear power plant is carried out in accordance with the principle of "segmented design and overall consideration";

[0145] 2) Based on the power plant design results (3D model), the auxiliary plant is divided into n super-large auxiliary plant segment modules from top to bottom, and the containment structure is divided into n+1 super-large containment structure segment modules from top to bottom. In this embodiment, the design scheme of Hualong One modified according to the super modular requirements is used as the basis, n=4, that is, the auxiliary plant has three super modules and the containment structure has four super modules. A certain segment module of the auxiliary plant is set at the same height as the corresponding segment module of the containment structure.

[0146] 3) Divide a single supermodule into multiple submodules. The division of submodules should take into account factors such as the versatility and transportability (road, rail, ship) of the submodules.

[0147] 4) Select specific general-purpose sub-modules according to power scale and safety configuration requirements and process and manufacture them in the module factory. While processing the sub-modules, carry out other construction work within the factory site, including excavation and foundation slab pouring.

[0148] 5) Transport the manufactured sub-modules to the segment module assembly plant or nuclear power construction site for super module frame manufacturing. During the large module assembly process, simultaneously carry out the installation and commissioning of instruments, equipment, pipelines, and cables within the super-large segment module to obtain n auxiliary plant frame modules and n+1 containment frame modules. While constructing the super frame module, carry out the construction of the turbine plant foundation. Lay the first layer of tracks on the turbine plant raft foundation and extend it to the containment structure site to provide a lifting foundation and translation channel for the super frame module.

[0149] 6) The first-layer containment frame module and the first-layer auxiliary plant frame module are transported sequentially to the corresponding construction sites along the first-layer track using a jacking and translation device, such as... Figure 2 As shown in Figure (1), multiple hydraulic jacks pre-installed on the concrete base plate at the corresponding position of the module are raised to the positioning point on the module. At the same time, the jacks are started to support the super module, the lifting platform is withdrawn, the lifting platform returns to the lifting point along the original path, and then the jacks are lowered to position the super module and support it by the concrete base plate. Then the jacks are withdrawn from the positioning point through the side hole.

[0150] 7) Install the first-layer containment frame module and the first-layer auxiliary plant frame module. The installation work includes welding the pre-reserved reinforcing bars for connecting the base plate concrete, connecting pipelines, connecting cables, etc., and then pouring concrete to obtain the first-layer containment molding module and the first-layer auxiliary plant molding module.

[0151] 8) Remove the first layer of tracks on the turbine building site, then construct a first overlapping platform on the turbine building site, flush with the first layer of containment molding modules. Lay a second layer of tracks on the first overlapping platform, extending from the first layer of auxiliary building molding modules to the first layer of containment molding modules, as shown below. Figure 2 As shown in Figure (2); then the second containment frame module is first lifted to the first overlapping platform, and then transported to the first containment forming module via the second track. Then the second auxiliary building frame module is lifted to the first overlapping platform, and then transported to the first auxiliary building forming module via the second track. The dismantling of the second track on the nuclear island building and the installation and pouring of the second frame module are completed, forming the second containment forming module and the second auxiliary building forming module.

[0152] 9) Remove the second-layer track on the first overlapping platform near the nuclear island building, and construct a second overlapping platform at that location, flush with the second-layer containment molding module. Lay a third-layer track on the second overlapping platform, extending it through the second-layer auxiliary building molding module to the second-layer containment molding module (this can be carried out simultaneously with the installation and pouring of the second-layer frame module). Figure 2 As shown in Figure (3); first, the third-layer containment frame module is lifted to the first overlapping platform, then lifted to the second overlapping platform, and then transported to the second-layer containment forming module via the third-layer track. Then, the third-layer auxiliary building frame module is lifted to the first overlapping platform, then lifted to the second overlapping platform, and then transported to the second-layer auxiliary building forming module via the third-layer track. This completes the dismantling of the third-layer track on the nuclear island building, as well as the installation and pouring of the third-layer frame module, forming the third-layer containment forming module and the third-layer auxiliary building forming module, as shown in Figure (3). Figure 2 As shown in Figure (4);

[0153] 10) This process continues until the construction of the nth containment building module and the nth auxiliary building module is completed. Then, the (n+1)th containment frame module is sequentially lifted along the first overlapping platform, the second overlapping platform, ... the nth overlapping platform, and then transported via the nth track to the nth containment building module. This completes the dismantling of the (n+1)th track on the nuclear island building, as well as the installation and pouring of the (n+1)th frame module, forming the (n+1)th containment building module. Figure 2 As shown in Figure (5).

[0154] 11) While installing and pouring the (n+1)th layer frame module, the overlapping platform on the turbine building site is dismantled and rebuilt to form two walls of the turbine building, thus completing the construction of the remaining walls and roof of the turbine building; at the same time, the construction of auxiliary buildings is completed, such as... Figure 2As shown in Figure (6).

[0155] In this embodiment, a lifting and translation device is used to lift the frame module, such as... Figure 3 As shown, the lifting and translating device includes:

[0156] The mobile mechanism and support platform 4, the support platform 4 is used to support the frame module,

[0157] The moving mechanism includes: a self-propelled vehicle 5 and a climbing mechanism 2, the climbing mechanism 2 including a climbing pole 12 and a climbing drive unit.

[0158] The climbing pole 12 passes through the support platform 4, its lower end is connected to the self-propelled vehicle 5, and its upper end protrudes from the large module. The climbing drive unit is connected to the support platform 4 and is used to drive the support platform 4 to rise and fall relative to the climbing pole 12, or to drive the climbing pole 12 to rise and fall relative to the support platform 4. The self-propelled vehicle 5 is used to drive the lifting and translating device to translate.

[0159] Therefore, this lifting and translating device can be used as a transportation tool for the vertical assembly and construction of the nuclear island plant, transporting and lifting the upper-level large segment modules to the lower-level large modules.

[0160] In this embodiment, the climbing drive unit includes multiple telescopic cylinders 10, which are distributed circumferentially around the climbing pole 12. The telescopic cylinders 10 are fixedly connected to the support platform 4 and provide support power to the support platform 4.

[0161] The telescopic cylinder 10 repeats the sequence of actions: one of its fixed part and telescopic part is connected to the climbing rod 12, and the other is disconnected from the climbing rod 12. The telescopic cylinder 10 extends and retracts, and one of its fixed part and telescopic part is disconnected from the climbing rod 12, and the other is connected to the climbing rod 12. The telescopic cylinder 10 resets, so that the support platform 4 rises and falls relative to the climbing rod 12, or the climbing rod 12 rises and falls relative to the support platform 4.

[0162] In this embodiment, the telescopic part of the telescopic cylinder 10 is located below its fixed part. The climbing mechanism realizes the process of the support platform 4 rising relative to the climbing pole 12 as follows: the fixed part is connected to the climbing pole 12, the telescopic part is disconnected from the climbing pole 12 - the telescopic cylinder 10 retracts - the fixed part is disconnected from the climbing pole 12, the telescopic part is connected to the climbing pole 12 - the telescopic cylinder 10 extends, and so on, thereby realizing the rise of the support platform 4 relative to the climbing pole 12.

[0163] The process by which the climbing mechanism lowers the support platform 4 relative to the climbing pole 12 is the reverse of the above-described upward process, and will not be described again here.

[0164] The process by which the climbing mechanism enables a row of climbing poles 12 to rise or fall relative to the support platform 4 is the same as the process by which the support platform 4 rises or falls relative to the climbing poles 12, and will not be described again here.

[0165] In this embodiment, both the fixed part and the telescopic part of the telescopic cylinder 10 are connected to the climbing rod 12 via bite teeth 11.

[0166] In this embodiment, the support platform 4 is provided with a mounting hole 43 and a through hole 42. The through hole 42 is coaxially arranged with the mounting hole 43 and penetrates the upper and lower surfaces of the support platform 4. The through hole 42 matches the climbing rod 12. The climbing rod 12 penetrates the support platform 4 through the through hole 42, and the climbing drive unit is located in the mounting hole 43.

[0167] The frame module is lifted using a jacking and translation device, specifically including:

[0168] S1: As Figure 4 As shown, the lifting and translation device carrying the upper frame module 3 moves along track 7 from the relatively low frame structure of the primary nuclear power plant turbine building to the relatively high overlapping platform.

[0169] S2: As Figure 5 As shown, the climbing drive unit drives the support platform 4 and the upper frame module 3 it carries to climb upward on the climbing pole 12, until the distance between the bottom surface of the support platform 4 and the connecting platform is greater than or equal to the height of a self-propelled vehicle 5.

[0170] S3: As Figure 6 As shown, the lifting and translating device moves forward until the front edge of the support platform 4 extends into the upper space of the overlapping platform, and the first overlapping vehicle 8, which is supported on the overlapping platform and located below the front edge of the support platform 4, is detachably connected to the support platform 4. The purpose of the first overlapping vehicle 8 is to bear part of the weight of the support platform 4 and the upper frame module 3, so as to prevent the device from tipping over after the first row of moving mechanisms is lifted, thereby providing conditions for the retraction of the first row of moving mechanisms.

[0171] S4: As Figure 7 As shown, with the support of the first connecting vehicle 8, the first row of unraised climbing poles 12 in the forward direction of the lifting and translating device is raised until the bottom surface of the self-propelled vehicle 5 connected to the row of climbing poles 12 is flush with the top surface of the connecting platform. The lifting and translating device moves forward until the self-propelled vehicle 5 connected to the row of climbing poles 12 is supported on the top surface of the connecting platform.

[0172] S5: Remove the first connecting vehicle 8 installed on the bottom surface of the front edge of the support platform 4;

[0173] S6: As Figure 8As shown, repeat step S4 until all the self-propelled vehicles 5 except the last row are supported on the top surface of the overlapping platform; the lifting and translating device moves forward until the bottom surface of the support platform 4 is located between the last two rows of climbing poles 12 and enters the upper space of the overlapping platform. The second overlapping vehicle 15, which is supported on the overlapping platform and located below the bottom surface of the support platform 4 between the last two rows of climbing poles 12, is detachably connected to the support platform 4 so that it supports the tail of this device, providing conditions for retracting the last stage of the moving mechanism;

[0174] S7: As Figure 9 As shown, the last row of unraised climbing poles 12 in the forward direction of the lifting and translating device is raised until the bottom surface of the self-propelled vehicle 5 connected to the row of climbing poles 12 is flush with the top surface of the overlapping platform. The lifting and translating device moves forward until the self-propelled vehicle 5 connected to the row of climbing poles 12 is supported on the top surface of the next layer of forming module 1, thus completing the lifting of the frame module.

[0175] In this embodiment,

[0176] The upper frame module 3 is transported to the lower forming module 1 via an overlapping platform using a lifting and translation device, specifically including:

[0177] S8: As Figure 10 As shown, the lifting and translating device continues to move forward until the upper frame module 3 is located above the lower molding module 1. A lifting mechanism 9 is set between the lower molding module 1 and the upper frame module 3 to lift the upper frame module 3 to detach it from the support platform 4, thus providing conditions for the removal of this device.

[0178] Specifically, such as Figure 21 As shown, the bottom surface of the upper frame module 3 has a receiving groove 17 that can accommodate the retracted lifting mechanism 9, and the top surface of the upper frame module 3 has a first channel 14 that communicates with the receiving groove 17.

[0179] The lifting mechanism 9 is manually fed into the receiving slot 17 from the first channel 14. After being lifted, the lifting mechanism 9 abuts between the next layer forming module 1 and the previous layer frame module 3.

[0180] S9: As Figure 11 As shown, the climbing pole 12 is then removed, and the self-propelled vehicle 5 is connected to the support platform 4.

[0181] S10: As Figure 12 As shown, the lifting and translating device moves backward until it is removed from between the lower layer forming module 1 and the upper layer frame module 3; the lifting and translating device continues to move backward until the first row of self-propelled vehicles 5 that have not descended in the direction of the lifting and translating device's backward movement are suspended in the air, providing conditions for the installation of the climbing pole 12.

[0182] S11: As Figure 13As shown, the climbing pole 12 is passed through the support platform 4 and connected to the suspended self-propelled vehicle 5, and then the connection between the suspended self-propelled vehicle 5 and the support platform 4 is disconnected.

[0183] S12: As Figure 14 As shown, the climbing pole 12 is lowered to the self-propelled vehicle 5 connected to it, which descends to a relatively low track and provides support for the support platform, thus creating conditions for dismantling the second connecting vehicle 15.

[0184] S13: As Figure 15 As shown, the second connecting vehicle 15 is dismantled;

[0185] S14: As Figure 16 As shown, repeat steps S10-S12 until all the self-propelled vehicles 5 except the last row in the backward direction have descended to the relatively low track. Then install the third connecting vehicle 16 on the bottom surface of the front edge of the support platform 4 and support it on the connecting platform.

[0186] S15: As Figure 17 As shown, the lifting and translating device moves backward until the last row of self-propelled vehicles 5 in the backward direction of the lifting and translating device is suspended in the air, and climbing poles 12 are installed for them;

[0187] S16: As Figure 18 As shown, the last row of climbing poles 12 is lowered down to the self-propelled vehicle 5 connected to it, and then the third connecting vehicle 16 is removed and the lifting and translating device is removed.

[0188] S17: As Figure 19 As shown, the lifting mechanism 9 retracts into the receiving groove 17 on the bottom surface of the upper frame module 3, so that the upper frame module 3 is supported on the lower molding module 1.

[0189] S18: As Figure 20 As shown, the lifting mechanism 9 can be manually retrieved from the receiving slot 17 via the first channel 14, allowing the connection construction between the upper frame module 3 and the next level large module to proceed.

[0190] Among them, the support platform 4 is a steel structure platform. According to the load requirements, multiple climbing mechanisms connected to the self-propelled vehicle 5 are set up. The climbing mechanism consists of a hydraulic moving device, a biting tooth 11, and a climbing pole 12. The hydraulic moving device serves as the climbing drive unit, and its fixed part and telescopic part are connected to the climbing pole 12 through the biting tooth 11.

[0191] The large segmented module is adaptively designed. The module has a second channel 13 corresponding to the climbing pole 12 for the climbing pole 12 to pass through, and a first channel 14 to facilitate the lifting mechanism to be sent into or taken out of the receiving slot. In addition, each connecting vehicle and the self-propelled vehicle 5 of the moving mechanism have the same structure and are all walking-type jacking and pushing vehicles.

[0192] Therefore, this invention cleverly applies the lifting and translation technology to nuclear power plant design and construction, enabling truly super-modular design and construction of nuclear power plants, significantly shortening the construction cycle while flexibly meeting user needs.

[0193] Specifically, the inventors proposed a super-modular design and construction method for nuclear power plants, which involves the following: In terms of design, the nuclear island building along the critical path of nuclear power plant construction is axially divided into multiple ultra-large segmented modules. Each ultra-large segmented module is constructed in a factory using standard sub-modules of similar dimensions, manufactured in the factory. During the assembly of the large modules, the installation and commissioning of instruments, equipment, pipelines, and cables within the ultra-large segmented modules are carried out simultaneously. The completed and commissioned ultra-large segmented modules are then transported to the construction site. In terms of construction, the traditional crane hoisting method is transformed into a "lifting-and-moving" construction method, overcoming the limitations of crane lifting capacity on module size and weight. The "lifting-and-moving" method is the key to the success of the super-modular design and construction method for nuclear power plants.

[0194] According to the super modular approach, the large modular sections of the nuclear island in nuclear power plants are generally huge in scale. For example, the reactor building section module has a diameter of more than 40 meters, a height of more than 20 meters, and a weight of more than 3,000 tons. How to lift and move such a large modular section to the installation position is the first problem that the super modular approach must solve.

[0195] To ensure the stability of the large module segment lifting of nuclear power plants, the inventors proposed dividing the nuclear island building into multiple segments and lifting them step by step (the longer the lifting stroke, the worse the support stability).

[0196] The reinforced turbine building frame structure is used as a platform and transportation channel for the multi-stage lifting of ultra-large segmented modules. Combined with the "lifting-translation" method of this invention (this invention uses an alternating lifting and translation method to achieve the lifting and translation of large module segments into place), the vertical assembly and construction of the nuclear island building is realized.

[0197] Furthermore, by adjusting the type and size of the sub-modules that make up the segment module, the type of the segment module can be adjusted. Combined with adjustments to the type, quantity, capacity, and axial height of related equipment within the segment module, nuclear power plant designs with different power scales and safety system configurations can be flexibly realized according to user needs, making the nuclear power plant a truly modular system.

[0198] In this embodiment, as Figure 22As shown, a through slot 46 is provided on the top surface of the support platform 4. The through slot 46 extends along the translational direction of the support platform 4 and is used for the lifting mechanism to pass through. It includes a first through slot, a second through slot, ..., an Nth through slot distributed sequentially along the translational direction of the support platform 4. The first through slot penetrates the front side of the support platform 4 in the translational direction, and the Nth through slot penetrates the rear side of the support platform 4 in the translational direction, where N≥2.

[0199] The distance between the central axis of the lifting mechanism rising from the front end of the (M+1)th channel and the front side of the support platform 4 is less than or equal to the distance between the central axis of the lifting mechanism rising from the rear end of the Mth channel and the front side of the support platform 4, where M ≥ 1.

[0200] The specific processes of steps S8-S10 include:

[0201] S8.1: The lifting and translating device continues to move forward until the upper frame module 3 is located above the lower forming module 1.

[0202] S8.2: A lifting mechanism 9 is installed between the bottom surface of the next layer forming module 1 and the support platform 4, such as... Figure 23 As shown, the lifting mechanism 9 includes a first lifting mechanism 91 and a second lifting mechanism 92. The first lifting mechanism 91 and the second lifting mechanism 92 are distributed circumferentially along the support platform 4. The second lifting mechanism 92 rises from the Nth through slot to lift the rear edge of the bottom surface of the large module. The first lifting mechanism 91 is located between the destination and the front edge of the bottom surface of the support platform 4. The first set of first lifting mechanisms 91 rises from the first through slot to lift the front edge of the bottom surface of the large module, so that the large module is lifted to detach from the support platform 4, providing conditions for the removal of this device.

[0203] S9: Remove the climbing pole 12 and connect the self-propelled vehicle 5 to the support platform 4.

[0204] S10.1: The lifting and translating device begins to translate to withdraw from between the upper frame module 3 and the lower molding module 1. When the first lifting mechanism 91 of the first group is located at the rear end of the first through slot, the second lifting mechanism 91 of the second group passes through the second through slot to lift the front edge of the bottom of the upper frame module 3. At the same time, the first lifting mechanism 91 of the first group descends below the bottom surface of the support platform 4, so that the lifting and translating device can continue to withdraw. This process continues until the Nth lifting mechanism 91 passes through the Nth through slot to lift the front edge of the bottom of the upper frame module 3, thus completing the withdrawal of the lifting and translating device from the destination and the upper frame module 3.

[0205] S10.2: The lifting and translating device continues to move backward until the first row of self-propelled vehicles 5 that have not descended in the direction of the lifting and translating device are suspended in the air, providing conditions for the installation of the climbing pole 12.

[0206] Therefore, by cleverly designing the support platform 4 that supports the large frame module, and by arranging lifting mechanisms corresponding to the through slots between the bottom front edge of the upper frame module and the lower molding module, when the lifting and translating device moves to the rear end of the previous set of lifting mechanisms located in the previous column of through slots, the next set of lifting mechanisms rises from the next column of through slots, together with the lifting mechanism at the other end of the translation direction, to smoothly lift the large module. At the same time, the previous set of lifting mechanisms descends below the bottom surface of the support platform 4, so that the lifting and translating device can be completely withdrawn from between the upper frame module and the lower molding module.

[0207] In this embodiment,

[0208] The two ends of the upper frame module 3, perpendicular to the translation direction of the support platform 4, extend outward relative to the support platform 4.

[0209] Step S10.1 further includes: setting up a third lifting mechanism between the bottom surfaces of the lower molding module 1 and the upper frame module 3 at one end perpendicular to the translation direction of the support platform 4, and setting up a fourth lifting mechanism between the bottom surfaces of the lower molding module 1 and the upper frame module 3 at the other end perpendicular to the translation direction of the support platform 4.

[0210] In this embodiment, the Mth through slot and the Mth-to-last through slot are set up correspondingly, and M≥1, so that the Mth through slot and the Mth-to-last through slot can share the same set of lifting mechanisms, thereby reducing the arrangement of lifting mechanisms and saving costs.

[0211] To ensure the support strength of the support platform, the distance between the central axis of the lifting mechanism raised at the front end of the M+1th through slot and the front side of the support platform 4 is preferably equal to the distance between the central axis of the lifting mechanism raised at the rear end of the Mth through slot and the front side of the support platform 4.

[0212] In the above case, in order to avoid interference between the through-slot wall and the lifting mechanism, the through-slot 46 is designed as an oblong hole, and the semi-circular holes at both ends of the oblong hole are matched with the lifting mechanism.

[0213] To achieve smooth lifting of the large module, multiple lifting mechanisms are needed to lift the large module at both ends along the translational direction of the support platform. Therefore, in this embodiment, multiple first through slots, second through slots, ..., Nth through slots are provided. The multiple through slots of each type are arranged at intervals along the direction perpendicular to the translational direction of the support platform 4.

[0214] Furthermore, the pattern of multiple through slots of each type projected onto the upper surface of the support platform 4 is symmetrical about the diameter of the upper surface of the support platform 4 parallel to its translation direction.

[0215] In this embodiment, N equals 3. See also Figure 1There are three first and three third through slots, and they are arranged correspondingly. The projection of the middle through slot is symmetrical about the diameter, and the projections of the two through slots on both sides are symmetrical about the diameter. There are four second through slots, and their projections are symmetrical about the diameter in pairs.

[0216] Example 2:

[0217] The difference between this embodiment and Embodiment 1 is that:

[0218] The support platform 4 includes a support platform body 41 and multiple support arms 45. The support platform body 41 can support the frame module when the self-propelled vehicle 5 is parked. The support arms 45 are rotatably connected to the edge of the support platform body 41 via hinges 44. The multiple support arms 45 are arranged at circumferential intervals along the support platform body 41.

[0219] Multiple support arms 45 can rotate to an extended state around their respective hinge points, so that the multiple support arms 45 and the support platform body 41 constitute a support structure that can stably support the frame module when the self-propelled vehicle 5 is moving.

[0220] Multiple support arms 45 can also rotate around their respective hinge points to a retracted state so that after the frame module is lifted by the lifting mechanism 9 arranged on its bottom edge to detach from the support platform 4, the lifting and translation device can be withdrawn from between the lower layer molding module 1 and the upper layer frame module 3.

[0221] or,

[0222] like Figure 24 As shown, the support platform 4 includes two support units, which are arranged in parallel along the translation direction of the support platform 4 and symmetrical about the longitudinal center plane of the upper frame module 3. Two corresponding moving mechanisms are provided, each corresponding to one of the two support units.

[0223] Each support unit includes a support platform body 41 and multiple support arms 45. Two support platform bodies 41 can support the frame module when the self-propelled vehicle 5 is parked. The support arms 45 are rotatably connected to the edge of the corresponding support platform body 41, and the multiple support arms 45 are arranged at circumferential intervals along the corresponding support platform body 41.

[0224] Multiple support arms 45 can rotate to an extended state around their respective hinge points, so that the multiple support arms 45 and the two support platform bodies 41 constitute a support structure that can stably support the frame module when the self-propelled vehicle 5 is moving.

[0225] Multiple support arms 45 can also rotate around their respective hinge points to a retracted state so that after the frame module is lifted by the lifting mechanism 9 arranged on its bottom edge to detach from the support platform 4, the lifting and translation device can be withdrawn from between the lower layer molding module 1 and the upper layer frame module 3.

[0226] In this embodiment, the second option is preferred. Thus, lifting mechanisms can be installed at both ends of the bottom surface of the upper frame module 3 along the retraction direction of the support platform and at both ends perpendicular to the retraction direction of the support platform without interfering with the retraction of the two support units. This enables the smooth transfer and lifting of large modules with large volume and weight.

[0227] The specific processes of steps S8-S10 include:

[0228] S8.1: The lifting and translating device continues to move forward until the upper frame module 3 is located above the lower molding module 1.

[0229] S8.2: Multiple support arms 45 rotate around their respective hinge points to the retracted state.

[0230] A lifting mechanism 9 is arranged between the bottom edges of the next layer molding module 1 and the previous layer frame module 3. Specifically, as shown in the figure... Figure 25 As shown, a first lifting mechanism 91 is set between the bottom end of the upper frame module 3 perpendicular to the translation direction of the support platform 4 and the lower forming module; a second lifting mechanism 92 is set between the bottom end of the upper frame module 3 perpendicular to the translation direction of the support platform 4 and the lower forming module; a third lifting mechanism 93 is set between the bottom end of the upper frame module 3 along the translation direction of the support platform 4 and the lower forming module; and a fourth lifting mechanism 94 is set between the bottom end of the upper frame module 3 along the translation direction of the support platform 4 and the lower forming module, so that the upper frame module 3 is smoothly lifted to detach from the support platform. Then, the multiple support arms 45 are rotated around their respective hinge points to the retracted state.

[0231] S9: Remove the climbing pole 12 and connect the self-propelled vehicle 5 to the support platform 4.

[0232] S10: The lifting and translating device is translated to withdraw from between the upper frame module 3 and the lower molding module 1.

[0233] Therefore, by setting out and retractable support arms 45 around the support platform 4, the support arms 45, when extended, can support the large module together with the support platform 4 to prevent it from swaying and falling off the support platform 4 during transportation. After the large module is transported to the destination, since there is space between adjacent support arms 45, lifting mechanisms can be symmetrically arranged between the two ends of the bottom surface of the large module perpendicular to the retraction direction of the support platform 4 and the destination to lift the large module off the support platform. After the support arms 45 are retracted, the symmetrically arranged lifting mechanisms will not interfere with the withdrawal of the transfer device. Thus, the present invention can achieve the dual purpose of stable transportation of large modules and providing conditions for the withdrawal of transfer devices.

[0234] The length and hinge position of the support arm 45 are flexibly set according to the lifting mechanism deployed on site, ensuring that after the lifting mechanism lifts the large module to the point of separation from the support platform, the lifting mechanism does not interfere with the recovery of the support arm 45, nor with the retraction of the transfer device.

[0235] In this embodiment, as Figure 25 As shown, after the support arm 45 is retracted, its orthographic projection on the plane passing through the upper surface of the support platform 4 is located on the upper surface of the support platform 4.

[0236] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A modular construction method for a nuclear power plant, characterized in that, include: The nuclear island building was divided into multiple modules from top to bottom, and the frames of each module were manufactured separately to obtain multiple frame modules. After the first-layer frame module is transported to the construction site, it is poured to form the first-layer molded module. A first overlapping platform, flush with the first-layer molding module, is constructed on one side. The second-layer frame module is then lifted onto the first overlapping platform, transported via the first overlapping platform to the first-layer molding module, and poured to form the second-layer molding module. A second overlapping platform, flush with the second-layer molding module, is constructed on the first overlapping platform. The third-layer frame module is first lifted onto the first overlapping platform, then lifted onto the second overlapping platform, and finally transported onto the second-layer molding module via the second overlapping platform for casting, thus forming the third-layer molding module. This process continues until all modules are completed. The frame module is lifted using a lifting and translating device, which includes: The moving mechanism and support platform (4), the support platform (4) being used to support the frame module, The moving mechanism includes a self-propelled vehicle (5), a climbing pole (12), and a climbing drive unit. The climbing pole (12) passes through the support platform (4), its lower end is connected to the self-propelled vehicle (5), and its upper end protrudes from the frame module. The climbing drive unit is connected to the support platform (4) and is used to drive the support platform (4) to move up and down relative to the climbing pole (12), or to drive the climbing pole (12) to move up and down relative to the support platform (4). The self-propelled vehicle (5) is used to drive the lifting and translating device to translate. The lifting and translation device is used to raise the frame module, specifically including: S1: The lifting and translating device moves the upper frame module (3) to the corresponding overlapping platform by starting the self-propelled vehicle (5). S2: The climbing drive unit drives the support platform (4) to climb upward on the climbing pole (12) until the distance between the bottom surface of the support platform (4) and the connecting platform is greater than or equal to the height of one self-propelled vehicle (5). S3: Lift the first row of unlifted climbing poles (12) in the lateral direction of the lifting and lateral movement device until the bottom surface of the self-propelled vehicle (5) connected to the row of climbing poles (12) is flush with the top surface of the overlapping platform. Then, move the lifting and lateral movement device forward until the self-propelled vehicle (5) connected to the row of climbing poles (12) is supported on the top surface of the overlapping platform. S4: Repeat step S3 until all the self-propelled vehicles (5) are supported on the top surface of the overlapping platform; The upper frame module (3) is transported to the lower forming module (1) via the lifting and translation device, specifically including: S5: The lifting and translating device moves forward to the next layer molding module (1), and a lifting mechanism (9) is set between the next layer molding module (1) and the upper layer frame module (3) to lift the upper layer frame module (3) until it is separated from the support platform (4). Then the climbing pole (12) is removed, and the self-propelled vehicle (5) is connected to the support platform (4). The lifting and translating device moves backward until it is withdrawn from between the next layer molding module (1) and the upper layer frame module (3). S6: The lifting and translating device continues to move backward until the first row of un-lowered self-propelled vehicles (5) in the direction of the lifting and translating device's backward movement is suspended in the air. The climbing pole (12) is passed through the support platform (4) and connected to the suspended self-propelled vehicle (5). The connection between the suspended self-propelled vehicle (5) and the support platform (4) is then released. The climbing pole (12) is lowered until the self-propelled vehicle (5) connected to it touches the ground / is supported on the next layer of overlapping platform (6). S7: Repeat step S6 until all self-propelled vehicles (5) are on the ground / supported on the next layer of overlapping platform (6). S8: The lifting mechanism (9) retracts into the next layer molding module (1) and / or the previous layer frame module (3) so that the previous layer frame module (3) is supported on the next layer molding module (1).

2. The modular construction method for nuclear power plants according to claim 1, characterized in that, Before step S3, the following also includes: Install the first connecting vehicle (8) on the bottom surface of the front edge of the support platform (4) and support it on the connecting platform; Between step S3 and step S4, the following is also included: Remove the first connecting vehicle (8) installed on the bottom of the front edge of the support platform (4).

3. The modular construction method for nuclear power plants according to claim 2, characterized in that, The installation of the first connecting vehicle (8) on the bottom surface of the leading edge of the support platform (4) and its support on the connecting platform specifically includes: The lifting and translating device moves forward until the front edge of the support platform (4) extends into the upper space of the overlapping platform, and the first overlapping vehicle (8) supported on the overlapping platform and located below the front edge of the support platform (4) is detachably connected to the support platform (4).

4. The modular construction method for nuclear power plants according to claim 1, characterized in that, In step S4, before lifting the last row of unlifted climbing poles (12) in the forward direction of the lifting and translating device, the following steps are also included: Install the second connecting vehicle (15) on the bottom surface of the support platform (4) between the last two rows of climbing poles (12) and support it on the connecting platform; Between step S6 and step S7, the following is also included: Remove the second connecting vehicle (15) installed on the bottom of the support platform (4).

5. The modular construction method for nuclear power plants according to claim 4, characterized in that, The installation of the second connecting vehicle (15) on the bottom surface of the support platform (4) between the last two rows of climbing poles (12) and its support on the connecting platform specifically includes: The lifting and translating device moves forward to the upper space of the support platform (4) where the second connecting vehicle (15) is to be installed, and the second connecting vehicle (15) supported on the connecting platform and located below the part of the support platform (4) where the second connecting vehicle (15) is to be installed is detachably connected to the support platform (4).

6. The modular construction method for nuclear power plants according to claim 1, characterized in that, In step S7, before lowering the last row of unraised climbing poles (12) in the forward direction of the lifting and translating device, the following steps are also included: Install a third connecting vehicle (16) on the bottom surface of the front edge of the support platform (4) and support it on the connecting platform; In step S7, after all the self-propelled vehicles (5) have touched the ground, the following steps are also included: Remove the third connecting vehicle (16) installed on the bottom of the support platform (4).

7. The modular construction method for nuclear power plants according to claim 1, characterized in that, The top surface of the next layer molding module (1) and / or the bottom surface of the upper layer frame module (3) have a receiving groove (17) capable of accommodating the retracted lifting mechanism (9). In step S5, the step of setting a lifting mechanism (9) between the lower-level forming module (1) and the upper-level frame module (3) specifically includes: A lifting mechanism (9) is provided in the receiving groove (17); In step S8, the lifting mechanism (9) retracts into the next layer forming module (1) and / or the previous layer frame module (3), specifically including: The lifting mechanism (9) retracts into the receiving groove (17).

8. The modular construction method for nuclear power plants according to claim 7, characterized in that, The top surface of the upper frame module (3) has a first channel communicating with the receiving groove (17). The lifting mechanism can be fed into the receiving groove (17) through the first channel, or moved out of the receiving groove (17) through the first channel.

9. The modular construction method for nuclear power plants according to any one of claims 1-8, characterized in that, The climbing drive unit includes multiple jacks, which are arranged in a ring around the climbing pole (12). The jacks are fixedly connected to the support platform (4) and provide support power to the support platform (4). The jack repeats the sequence of actions such as fixing one of its fixed part and telescopic part to the climbing pole (12), and disconnecting the other part from the climbing pole (12) - jack telescopic - disconnecting one of its fixed part and telescopic part from the climbing pole (12), and fixing the other part to the climbing pole (12) - jack resetting, so that the support platform (4) rises and falls relative to the climbing pole (12), or the climbing pole (12) rises and falls relative to the support platform (4).

10. The modular construction method for nuclear power plants according to claim 9, characterized in that, The support platform (4) is provided with a mounting hole, the climbing pole (12) passes through the mounting hole through the support platform (4), and the climbing drive unit is located in the mounting hole.

11. The modular construction method for nuclear power plants according to any one of claims 1-8, characterized in that, The jacking and translating device has two rows of translation mechanisms arranged in parallel, and is located on both sides of the longitudinal center plane of the upper frame module (3). Each overlapping platform includes two parallel walls. The two walls of the first overlapping platform are built on the site of the turbine building and correspond one-to-one with the two opposite walls to be built in the turbine building, as well as the two rows of translation mechanisms of the lifting and translation device. The two walls of the upper overlapping platform are respectively set on the two walls of the lower overlapping platform (6) and correspond one-to-one with the two walls of the lower overlapping platform (6). After the nuclear island plant was completed, the connecting platform on the turbine plant site was dismantled and rebuilt to form the two walls of the turbine plant.

12. The modular construction method for nuclear power plants according to claim 11, characterized in that, The nuclear island building includes a containment structure and auxiliary buildings, which are arranged sequentially along the translation direction of the jacking and translation device. The process of dividing the nuclear island plant into multiple modules from top to bottom and manufacturing the frames for each module to obtain multiple frame modules specifically includes: The auxiliary plant is divided into n auxiliary plant modules from top to bottom, and the containment structure is divided into n+1 containment modules from top to bottom. The frames are manufactured separately to obtain n auxiliary plant frame modules and n+1 containment frame modules. The m-th auxiliary plant frame module and the m-th containment frame module are set at the same height. n≥2, m≥1. The process of transporting the first-layer frame module to the construction site and then pouring it to form the first-layer molded module specifically includes: The first-layer containment frame module and the first-layer auxiliary plant frame module were transported to the corresponding construction sites and then poured to obtain the first-layer containment molding module and the first-layer auxiliary plant molding module. The process involves constructing a first overlapping platform flush with the first-layer molding module, lifting the second-layer frame module onto the first overlapping platform, transporting it via the first overlapping platform to the first-layer molding module, and then casting it to form the second-layer molding module. Specifically, this includes: On the turbine plant site, a first overlapping platform is constructed, flush with the first-layer containment molding module, and extends to connect with the first-layer auxiliary plant molding module. The second-layer containment frame module is first lifted onto the first overlapping platform, and then transported to the first-layer containment molding module via the first overlapping platform and the first-layer auxiliary plant molding module. Then, the second-layer auxiliary plant frame module is lifted onto the first overlapping platform, and then transported to the first-layer auxiliary plant molding module via the first overlapping platform, and cast to form the second-layer containment molding module and the second-layer auxiliary plant molding module. The process involves constructing a second overlapping platform flush with the second-layer molding module on the first overlapping platform, then lifting the third-layer frame module onto the first overlapping platform, then onto the second overlapping platform, and finally transporting it onto the second-layer molding module for casting to form the third-layer molding module. Specifically, this includes: A second overlapping platform is constructed on the first overlapping platform, flush with the second-layer containment molding module, and extends to connect with the second-layer auxiliary building molding module. The third-layer containment frame module is first lifted onto the first overlapping platform, then lifted onto the second overlapping platform, and then transported to the second-layer containment molding module via the second overlapping platform and the second-layer auxiliary building molding module. The third-layer auxiliary building frame module is then first lifted onto the first overlapping platform, then lifted onto the second overlapping platform, and then transported to the second-layer auxiliary building molding module via the second overlapping platform, where it is poured to form the third-layer containment molding module and the third-layer auxiliary building molding module. This process continues in the same manner until the construction of all modules is completed, specifically including: This process continues until the construction of the nth containment building module and the nth auxiliary building module is completed. Then, the (n+1)th containment frame module is lifted sequentially along the first overlapping platform, the second overlapping platform, ... the nth overlapping platform, and then transported to the nth containment building module via the nth overlapping platform and the nth auxiliary building module. The module is then poured to form the (n+1)th containment building module.

13. The modular construction method for nuclear power plants according to claim 12, characterized in that, Also includes: Complete the construction of the steam turbine plant and auxiliary plant.

14. The modular construction method for a nuclear power plant according to any one of claims 1-8, characterized in that, The top surface of the support platform (4) is provided with a through groove (46), which extends along the translational direction of the support platform (4) and is used for the lifting mechanism to pass through. It includes a first through groove, a second through groove, ..., an Nth through groove distributed sequentially along the translational direction of the support platform (4). The first through groove penetrates the front side of the support platform (4) in the translational direction, and the Nth through groove penetrates the rear side of the support platform (4) in the translational direction. N≥2. The distance between the central axis of the lifting mechanism rising from the front end of the (M+1)th channel and the front side of the support platform (4) is less than or equal to the distance between the central axis of the lifting mechanism rising from the rear end of the Mth channel and the front side of the support platform (4), M≥1. The specific process of step S5 includes: S5.1: The lifting and translating device moves forward to the next layer of forming module (1). S5.2: A lifting mechanism (9) is arranged between the bottom surface of the next layer forming module (1) and the support platform (4). The lifting mechanism (9) includes a first lifting mechanism (91) and a second lifting mechanism (92). The first lifting mechanism (91) and the second lifting mechanism (92) are distributed at intervals along the circumference of the support platform (4). The second lifting mechanism (92) rises from the Nth through slot to lift the rear edge of the bottom surface of the large module. The first lifting mechanism (91) is located between the destination and the front edge of the bottom surface of the support platform (4). The first set of first lifting mechanisms (91) rises from the first through slot to lift the front edge of the bottom surface of the large module, so that the large module is lifted to the point of detachment from the support platform (4). S5.3: Remove the climbing pole (12) and connect the self-propelled vehicle (5) to the support platform (4). S5.5: The lifting and translating device begins to translate to withdraw from between the upper frame module (3) and the lower molding module (1). When the first lifting mechanism (91) is located at the rear end of the first through slot, the second lifting mechanism (91) passes through the second through slot to lift the front edge of the bottom of the upper frame module (3). At the same time, the first lifting mechanism (91) descends below the bottom surface of the support platform (4), so that the lifting and translating device can continue to withdraw. This continues until the Nth lifting mechanism (91) passes through the Nth through slot to lift the front edge of the bottom of the upper frame module (3), thus completing the withdrawal of the lifting and translating device from the destination and the upper frame module (3).

15. The modular construction method for nuclear power plants according to claim 14, characterized in that, The upper frame module (3) extends outward from both ends perpendicular to the translation direction of the support platform (4) relative to the support platform (4). Step S5.2 further includes: setting up a third lifting mechanism between the bottom surface of the lower layer forming module (1) and the upper layer frame module (3) at one end perpendicular to the translation direction of the support platform (4), and setting up a fourth lifting mechanism between the bottom surface of the lower layer forming module (1) and the upper layer frame module (3) at the other end perpendicular to the translation direction of the support platform (4).

16. The modular construction method for nuclear power plants according to claim 14, characterized in that, The Mth through slot and the Mth-to-last through slot are set up accordingly, M≥1, and the Mth through slot and the Mth-to-last through slot share a set of first lifting mechanisms (91).

17. The modular construction method for nuclear power plants according to claim 14, characterized in that, Multiple first through slots, second through slots, ..., Nth through slots are provided, and the multiple through slots of each type are arranged at intervals along the direction perpendicular to the translation of the support platform (4). Furthermore, the pattern of multiple through slots of each type projected onto the upper surface of the support platform (4) is symmetrical about the diameter of the upper surface of the support platform (4) parallel to its translation direction.

18. The modular construction method for a nuclear power plant according to any one of claims 1-8, characterized in that, The support platform (4) includes a support platform body (41) and multiple support arms (45). The support arms (45) are rotatably connected to the edge of the support platform body (41), and the multiple support arms (45) are arranged at intervals along the circumference of the support platform body (41). Multiple support arms (45) can rotate around their respective hinge points to the unfolded state, so that the multiple support arms (45) and the support platform body (41) constitute the support structure of the support frame module; Multiple support arms (45) can also be lifted by the lifting mechanism arranged on the bottom edge of the frame module to detach from the support platform (4), and rotate around their respective hinge points to the retracted state. When multiple support arms (45) are in the retracted state, the lifting and translation device can be withdrawn from between the lower layer forming module (1) and the upper layer frame module (3). or, The support platform (4) includes two support units, which are arranged in parallel along the translation direction of the support platform (4) and symmetrical about the longitudinal center plane of the upper frame module (3). Two moving mechanisms are provided, each corresponding to one of the two support units. Each support unit includes a support platform body (41) and multiple support arms (45), the support arms (45) being rotatably connected to the edge of the corresponding support platform body (41), and the multiple support arms (45) being arranged at circumferential intervals along the corresponding support platform body (41). Multiple support arms (45) can rotate around their respective hinge points to the unfolded state, so that the multiple support arms (45) and the two support platform bodies (41) constitute the support structure of the support frame module; Multiple support arms (45) can also be lifted by the lifting mechanism arranged on the bottom edge of the frame module to detach from the support platform (4), and rotate around their respective hinge points to the retracted state. When multiple support arms (45) are in the retracted state, the lifting and translation device can be withdrawn from between the lower layer forming module (1) and the upper layer frame module (3). The specific process of step S5 includes: S5.1: The lifting and translating device moves forward to the next layer of forming module (1). S5.2: A lifting mechanism (9) is installed between the bottom edge of the lower layer molding module (1) and the upper layer frame module (3). The lifting mechanism lifts the upper layer frame module (3) to the point of separation from the support platform (4). Multiple support arms (45) rotate around their respective hinge points to the retracted state. S5.3: Remove the climbing pole (12) and connect the self-propelled vehicle (5) to the support platform body (41). S5.4: The lifting and translating device is translated to withdraw from between the upper frame module (3) and the lower molding module (1).

19. The modular construction method for nuclear power plants according to claim 18, characterized in that, The lifting mechanism (9) is provided in multiple ways, and the multiple lifting mechanisms (9) are distributed circumferentially along the upper frame module (3).

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