Auxiliary structure of nuclear power pressure cylinder

Abstract

The application discloses a kind of nuclear power pressure cylinder auxiliary structure, including with pressure cylinder detachable connection's fixing frame and for supporting the transport frame of pressure cylinder when transporting;The fixing frame is defined with the fixed space for accommodating the pressure cylinder;The fixing frame is the tubular shape of two ends through and one side opening, and the fixed space is communicated with outside through the opening;The transport frame is capped on the opening, and includes at least two support seats for supporting the pressure cylinder, and the at least two support seats are arranged at intervals;A plurality of hoisting positions are formed on the nuclear power pressure cylinder auxiliary structure.This application can assist pressure cylinder to be placed vertically, placed upside down, turn over, hoist, hoist, assemble, store, transport and so on each process, ensure the integrity of pressure cylinder in each process, simplify the implementation steps of each process.

Description

Technical Field

[0001] This invention relates to the field of nuclear power technology, and in particular to an auxiliary structure for a nuclear power pressure-bearing cylinder. Background Technology

[0002] Common assembly methods for pressure vessels include vertical and horizontal assembly. For long, narrow vessels, vertical assembly is generally used, followed by horizontal transport and storage after flipping. Because pressure vessels can be several meters long, the overall stability of their elongated structure is difficult to guarantee during hoisting and long-distance transport. When the deformation exceeds the elastic limit, it can cause overall plastic deformation, affecting dimensional accuracy. Furthermore, repeated hoisting using the vessel's own lifting lugs generates considerable local stress, leading to plastic deformation. To facilitate the assembly, hoisting, flipping, transport, and storage of long, narrow vessels, and to prevent plastic deformation during these processes, tooling is typically used for assistance.

[0003] Existing auxiliary structures for cylinders are relatively simple in function, with most only capable of performing one of the following functions: assembly, hoisting, flipping, or transportation. In addition, there are some multi-functional tooling supports, such as "sled" structures, which can simultaneously perform functions such as transporting and flipping the cylinder, but cannot perform functions such as assembling, vertical placement, inverted placement, or hoisting of the cylinder. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an auxiliary structure for a nuclear power plant pressure-bearing cylinder.

[0005] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0006] Constructing an auxiliary structure for a nuclear power plant pressure-bearing cylinder includes:

[0007] A fixing frame detachably connected to a pressure-bearing cylinder defines a fixing space for accommodating the pressure-bearing cylinder; the fixing frame is cylindrical with both ends open and one side open, and the fixing space communicates with the outside through the opening; and

[0008] A transport frame for supporting the pressure-bearing cylinder during transport, the transport frame covering the opening and including at least two support seats for supporting the pressure-bearing cylinder, the at least two support seats being spaced apart;

[0009] The nuclear power plant pressure-bearing cylinder auxiliary structure has multiple hoisting positions.

[0010] In some embodiments, the fixing frame includes a frame and a plurality of connecting seats, the plurality of connecting seats being respectively disposed on the inner side of the frame; the frame includes three frame plates connected in sequence, such that the cross-section of the frame is U-shaped, and at least one connecting seat is disposed on the inner side of each frame plate.

[0011] In some embodiments, a plurality of connectors are also included, each of the connectors being detachably connected to an ear-type support on the pressure-bearing cylinder via at least one of the connectors.

[0012] In some embodiments, the connector is a U-bolt.

[0013] In some embodiments, the connecting seat includes a horizontal rod portion for fitting against the ear-type support, the horizontal rod portion being horizontally disposed on the inner side of the frame; the U-bolt is inverted and fastened to the horizontal rod portion, and its two ends are detachably connected to the ear-type support respectively.

[0014] In some embodiments, the transport frame further includes a frame body that covers the opening, and the at least two support seats are spaced apart on one side of the frame body.

[0015] In some embodiments, the support base includes a support frame and a support plate that is attached to the side wall of the pressure-bearing cylinder. The support frame is erected on the frame, and the support plate is disposed at the end of the support frame away from the frame.

[0016] In some embodiments, a buffer layer is provided on the support base.

[0017] In some embodiments, at least one support rod is further included, with both ends of the support rod respectively mounted on the fixing frame on both sides of the opening.

[0018] In some embodiments, the support rod is detachably connected to the fixing frame; or one end of the support rod is rotatably connected to the fixing frame, and the other end is detachably connected to the fixing frame.

[0019] In some embodiments, both the fixing frame and the transport frame have a plurality of lifting positions; the lifting positions include a plurality of lifting holes and / or a plurality of lifting lugs.

[0020] In some embodiments, both the fixing frame and the transport frame have a plurality of lifting holes; the fixing frame also has a plurality of lifting lugs on the outer side of the end away from the opening.

[0021] In some embodiments, the transport frame is rotatably or detachably connected to the fixed frame.

[0022] In some embodiments, at least one straight ladder is also included, the straight ladder being disposed on the fixing frame.

[0023] Implementing the embodiments of the present invention has at least the following beneficial effects:

[0024] This application, by setting up a fixed frame and a transport frame, allows the pressure-bearing cylinder to be placed vertically, upside down, flipped, hoisted, installed, assembled, stored, and transported within the auxiliary structure of the nuclear power plant pressure-bearing cylinder when it is placed inside the auxiliary structure. This ensures the integrity of the pressure-bearing cylinder during each process and simplifies the implementation steps of each process. Attached Figure Description

[0025] The present application will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the auxiliary structure of the nuclear power plant pressure-bearing cylinder in the first embodiment of this application in its usage state;

[0027] Figure 2 yes Figure 1 The diagram shows the auxiliary structure of the nuclear power plant pressure vessel after the transport frame has been removed, in its operational state.

[0028] Figure 3 yes Figure 1 A schematic diagram of the structure of the fixing frame;

[0029] Figure 4 This is a schematic diagram of a fixing frame with a straight ladder in another embodiment;

[0030] Figure 5 yes Figure 1 A schematic diagram of the transport frame structure. Detailed Implementation

[0031] To provide a clearer understanding of the technical features, objectives, and effects of this application, the specific embodiments of this application are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this application.

[0032] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, that component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0033] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0034] Figures 1 to 5 The illustration shows an auxiliary structure 1 for a nuclear power plant pressure vessel 2 according to a first embodiment of this application, which includes a fixing frame 10 and a transport frame 20. The fixing frame 10 defines a fixed space 15 for accommodating the pressure vessel 2, used for accommodating the pressure vessel 2 during assembly, hoisting, flipping, and transportation, and can be detachably connected to the pressure vessel 2. The transport frame 20 is used to support the pressure vessel 2 during transportation.

[0035] It is important to understand that the pressure-bearing cylinder 2 is longitudinally elongated, with four lug-type supports 3 evenly spaced circumferentially along its center. The pressure-bearing cylinder 2 has multiple components. During assembly, disassembly, and connection of the pressure-bearing cylinder 2, it must be held vertically (its long axis extends along the numerical direction). Furthermore, during assembly, the pressure-bearing cylinder 2 needs to be tilted and its vertical orientation reversed. During transportation and storage, to prevent plastic deformation, the pressure-bearing cylinder 2 must be placed horizontally (its long axis extends horizontally).

[0036] Specifically, the mounting bracket 10 is cylindrical with two through-ends and an opening on one side, allowing the mounting space 15 to connect to the outside through the opening. When the pressure-bearing cylinder 2 needs to be placed in the mounting space 15, it can be moved in from one side of the mounting bracket 10 through this opening. There is no need to lift the pressure-bearing cylinder 2 and insert it from the top of the cylindrical mounting bracket 10. This simplifies the assembly and fixing process of the pressure-bearing cylinder 2, which can be several meters long, with the mounting bracket 10, avoiding the problem of insufficient factory space making it difficult to insert it from above. This reduces the requirements for factory hoisting height, lowers factory construction costs, and expands the application range of the bracket.

[0037] The transport frame 20 is sealed over the opening, so that the overall structure formed by the fixed frame 10 and the transport frame 20 is a circumferentially closed, cylindrical structure with both ends open. This ensures the stability of the pressure-bearing cylinder 2 within the nuclear power plant pressure-bearing cylinder auxiliary structure 1 during vertical installation, flipping, hoisting, and transportation, and prevents potential risks such as detachment.

[0038] Meanwhile, the transport frame 20 includes at least two support seats 22, which are spaced apart. When the pressure vessel 2 is located inside the nuclear power plant pressure vessel auxiliary structure 1, the support seats 22 are in contact with the side wall of the pressure vessel 2. They are used to support the pressure vessel 2 during transport, distributing the stress on the pressure vessel 2 when it is placed horizontally (for transport or storage), so that the nuclear power plant pressure vessel auxiliary structure 1 can realize the transport function of the pressure vessel 2 and ensure that the pressure vessel 2 does not undergo plastic deformation during horizontal placement.

[0039] Furthermore, the auxiliary structure 1 of the nuclear power plant pressure vessel has multiple lifting positions for connection to hoisting equipment during operations such as flipping and hoisting of the pressure vessel 2. This avoids direct contact between the hoisting equipment and the pressure vessel 2, preventing plastic deformation of the pressure vessel 2. Simultaneously, the connection between the lifting positions and the hoisting equipment simplifies the connection process, eliminating the need to locate lifting points on the pressure vessel 2 and ensure the stability of those points.

[0040] In summary, by setting up a fixed frame 10 and a transport frame 20, when the pressure vessel 2 is placed inside the nuclear power plant pressure vessel auxiliary structure 1, the pressure vessel 2 can be used to carry out various processes such as vertical placement, inverted placement, flipping, hoisting, lifting, assembly, storage, and transportation, ensuring the integrity of the pressure vessel 2 in each process and simplifying the implementation steps of each process.

[0041] like Figure 3As shown, in some embodiments, the mounting bracket 10 includes a frame 11 and a plurality of connecting seats 12. The frame 11 is cylindrical with an opening on one side, defining a fixed space 15 to accommodate the pressure-bearing cylinder 2. The plurality of connecting seats 12 are respectively disposed inside the frame 11, that is, within the fixed space 15. When the pressure-bearing cylinder 2 is disposed within the nuclear power plant pressure-bearing cylinder auxiliary structure 1, the connecting seats 12 can be detachably connected to the pressure-bearing cylinder 2, thereby achieving the positioning of the pressure-bearing cylinder 2 within the fixed space 15.

[0042] Furthermore, the frame 11 includes three frame plates connected in sequence, such that the cross-section of the frame 11 formed by the three plates is U-shaped, and the open side of the U-shape is the opening side of the fixing frame 10. Each frame plate has at least one connecting seat 12 on its inner side to ensure stability when connected to the pressure-bearing cylinder 2.

[0043] The three frame plates are now defined as the first frame plate 111, the second frame plate 112, and the third frame plate 113. In this embodiment, all three frame plates are formed by connecting longitudinally elongated I-beams end to end to form a rectangular frame, and are reinforced and supported by two I-beams connected in a cross shape (reinforcing ribs) within the rectangular frame, so that the frame plate is roughly longitudinally elongated in a grid shape.

[0044] The first frame plate 111, the second frame plate 112, and the third frame plate 113 are all rectangular. The plane containing the second frame plate 112 is perpendicular to the plane containing the first frame plate 111 and the plane containing the third frame plate 113, respectively. The two long sides of the second frame plate 112 share an I-beam with one long side of the first frame plate 111 and one long side of the third frame plate 113, respectively.

[0045] It is important to understand that, for example, Figure 1 and Figure 2 As shown, the length of the long side of the rectangular frame of the frame plate must be greater than the length of the pressure cylinder 2 to ensure that it can be placed vertically.

[0046] In some other alternative embodiments, the frame 11 may also consist of only one frame plate, which is set as an arc-shaped plate with the two sides of the arc spaced apart to form an opening.

[0047] In some other alternative embodiments, the frame plate can also be composed of steel plates and reinforcing ribs. When the frame plate consists of a rectangular frame and reinforcing ribs, the reinforcing ribs can also be composed of a single, three, or other number of I-beams. The reinforcing ribs can also be connected to the four corners of the rectangular frame, etc.

[0048] Continue reading Figure 3In this embodiment, there are three connecting seats 12, with one connecting seat 12 provided on each frame plate. The connecting seat 12 is located at the intersection of two intersecting I-beams within the rectangular frame. When the pressure-bearing cylinder 2 is connected to the connecting seat 12, the three connecting seats 12 correspond to the three lug supports 3 on the pressure-bearing cylinder 2, respectively.

[0049] It is important to understand that the position of the connecting seat 12 on the frame plate must correspond to the position of the lug support 3 on the pressure-bearing cylinder 2. The position of the connecting seat 12 can be flexibly adjusted for different types of pressure-bearing cylinders 2.

[0050] In some alternative embodiments, the number of connecting seats 12 on the frame 11 can also be set to two, four, or other numbers, which can be connected only to two opposing lug supports 3. Alternatively, each lug support 3 can have two connecting seats 12, with the two connecting seats 12 respectively located on the upper and lower sides of the lug support 3, improving the stability of the connection. Alternatively, connecting seats 12 can be omitted, allowing the frame 11 to be directly connected to the lug supports 3.

[0051] In some embodiments, the nuclear power plant pressure-bearing cylinder auxiliary structure 1 further includes a plurality of connectors 40, and the connecting seat 12 can be detachably connected to the lug support 3 through the connectors 40.

[0052] In this embodiment, the connector 40 uses a U-bolt to improve the assembly efficiency of the pressure-bearing cylinder 2 and the fixing frame 10.

[0053] like Figure 3 As shown, the connecting seat 12 is generally in the shape of a bent rod, with both ends connected to vertical I-beams within the frame plate, forming a right-angled triangle together with the I-beams. It includes a horizontal rod 121 and an inclined rod 122. The horizontal rod 121 is used to install U-bolts for connection to the lug support 3. The inclined rod 122 is used to increase the load-bearing capacity of the horizontal rod 121. The inclined rod 122 is inclined, with its top (outer end) connected to the frame 11 and its bottom (inner end) connected to the horizontal rod 121. The inner end of the horizontal rod 121 connects to the bottom (inner end) of the inclined rod 122, and its outer end connects to the frame 11, with the connection point to the frame 11 located directly below the connection point between the inclined rod 122 and the frame 11.

[0054] See also Figure 2During the assembly of the fixed frame 10 and the pressure-bearing cylinder 2, an inverted assembly is generally performed. After the pressure-bearing cylinder 2 is inverted and moved from the open side into the fixed space 15, the connecting seat 12 is located on the upper side of the lug support 3. At this time, the U-bolt is inverted and fastened onto the horizontal rod 121 of the connecting seat 12, with both ends inserted into the bolt holes of the lug support 3, thereby achieving a detachable connection between the two.

[0055] After the pressure-bearing cylinder 2 and the nuclear power plant pressure-bearing cylinder auxiliary structure 1 are assembled and flipped, the connecting seat 12 is located below the lug support 3. At this time, the connecting seat 12 can also provide upward support for the pressure-bearing cylinder 2.

[0056] In some other alternative embodiments, the connector 40 may also be other connecting components such as ordinary bolts.

[0057] In some embodiments, when the pressure-bearing cylinder 2 is located within the fixed space 15, there is a gap between the inner end of the connecting seat 12 and the side wall of the pressure-bearing cylinder 2. That is, the distance between the two connecting seats 12 is greater than the diameter of the corresponding position of the pressure-bearing cylinder 2. This is to avoid shaking or vibration during the flipping, hoisting, or transportation of the pressure-bearing cylinder 2, which could cause the inner end of the connecting seat 12 to collide with the pressure-bearing cylinder 2, resulting in damage or plastic deformation of the pressure-bearing cylinder 2.

[0058] For example Figure 3 As shown, in some embodiments, the fixing frame 10 further includes a plurality of stiffening plates 14, which are disposed on the frame 11 and respectively connect two adjacent I-beams to improve the structural strength of the frame 11. The stiffening plates 14 can also be replaced with rod-shaped reinforcing ribs.

[0059] In some embodiments, the upper and lower ends of the frame 11 are also provided with a plurality of lifting holes (not shown in the figure) for connection with lifting equipment during lifting and flipping.

[0060] Specifically, one or more can be provided at both ends of each frame panel, or one or more can be provided only at both ends of two parallel and opposite frame panels, etc. No specific limitation is made here.

[0061] It should be understood that this hoisting hole belongs to the hoisting position of auxiliary structure 1 of the nuclear power plant pressure vessel.

[0062] In some embodiments, the fixing frame 10 further includes a plurality of lifting lugs 13, which are disposed at the end of the frame 11 opposite to the opening and located on the outside of the end, for achieving a horizontal angle during hoisting, realizing the transition during the flipping process, or hoisting at a horizontal angle (horizontal hoisting), etc.

[0063] Because the lifting lug 13 is located at the end opposite to the opening, and the transport frame 20, which supports the pressure cylinder 2 horizontally, is closed over the opening, the position of the lifting lug 13 ensures that when the lifting equipment is connected to the lifting lug 13 (i.e., when the pressure cylinder 2 is horizontally lifted within the fixed frame 10), the lifting angle ensures that the pressure cylinder 2 is supported by the support seat 22 on the transport frame 20, preventing plastic deformation of the pressure cylinder 2. The lifting lug 13 can also cooperate with other lifting holes as auxiliary lifting points to jointly achieve operations such as lifting and flipping of the pressure cylinder 2.

[0064] In this embodiment, there are four lifting lugs 13, arranged in pairs, and respectively set on the two opposite long side I-beams of the second frame plate 112.

[0065] It should be understood that the lifting lug 13 also belongs to the lifting position of the auxiliary structure 1 of the nuclear power plant pressure-bearing cylinder.

[0066] like Figure 5 As shown, in some embodiments, the transport frame 20 further includes a frame body 21. A support base 22 is disposed on one side of the frame body 21.

[0067] In this embodiment, there are two support seats 22, which are spaced apart on the frame 21. When the pressure-bearing cylinder 2 is located in the fixed space 15, the two support seats 22 are located at two different axial positions of the pressure-bearing cylinder 2, and are located on both sides of the midpoint of the axis of the pressure-bearing cylinder 2, so as to ensure the stability of the support.

[0068] In some other alternative embodiments, the number of the support bases 22 can be adjusted to three, four, or more, depending on the length of the pressure-bearing cylinder 2.

[0069] Specifically, in this embodiment, the frame 21 is formed by four I-beams connected in a rectangular frame shape, the size of which matches the rectangular frame size of the three frame plates to ensure the consistency of the outer contour after assembly. The frame 21 also includes two I-beams for supporting the support base 22, which are arranged parallel to each other within the rectangular frame, with their ends connected to two opposite sides of the rectangular frame. The support base 22 is disposed on the I-beams.

[0070] In some other alternative embodiments, the frame 21 can also be made of steel plate, with the support base 22 erected on the steel plate. Alternatively, it can be formed by combining steel plates and I-beams, etc. Flexible configuration is possible.

[0071] In this embodiment, the support base 22 includes a support frame 221 and a support plate 222. The support frame 221 is erected on the frame body 21. The support plate 222 is disposed at the end of the support frame 221 away from the frame body 21, and its shape is adapted to the side wall of the pressure-bearing cylinder 2. When the pressure-bearing cylinder 2 is assembled with the nuclear power plant pressure-bearing cylinder auxiliary structure 1, the support plate 222 is fitted against the side wall of the pressure-bearing cylinder 2. This allows the support base 22 to support the pressure-bearing cylinder 2 through surface contact, preventing plastic deformation of the pressure-bearing cylinder 2 during flipping, assembly, hoisting, etc.

[0072] Specifically, the support plate 222 is arranged in an arc shape in this embodiment.

[0073] It should be understood that the support frame 221 can be plate-shaped and perpendicular to the frame body 21. It can also be rod-shaped. It can also be formed by combining a plate-shaped structure with multiple reinforcing ribs on the plate-shaped structure to improve the structural strength of the support base 22. No specific limitations are made here.

[0074] In some embodiments, a buffer layer is also provided on the support base 22. The buffer layer may be made of an elastic material and is used to buffer the pressure-bearing cylinder 2 to avoid vibration during processes such as overturning, hoisting, and transportation, which would cause rigid collision between the pressure-bearing cylinder 2 and the support base 22, resulting in plastic deformation.

[0075] In some embodiments, the transport frame 20 is detachably connected to the fixed frame 10.

[0076] See also Figure 1 Specifically, in this embodiment, the transport frame 20 and the fixed frame 10 are detachably connected via multiple connectors 40. When it is necessary to open the opening to move the pressure cylinder 2 in or out, the transport frame 20 is detached from the fixed frame 10. After the moving-in or moving-out operation is completed, the transport frame 20 is then reassembled onto the fixed frame 10 via the connectors 40 to close the opening.

[0077] In this embodiment, multiple lifting holes (not shown in the figure) are provided at both the upper and lower ends of the frame 21 of the transport frame 20 and on the support frame 221 of the support base 22, for lifting operations of the transport frame 20. This allows it to be lifted from a horizontal position to the location of the fixed frame 10 for assembly with the vertically positioned fixed frame 10.

[0078] It should be understood that the lifting holes on the transport frame 20 also belong to the lifting positions of the nuclear power plant pressure-bearing cylinder auxiliary structure 1.

[0079] In some other alternative embodiments, the right-angled side formed by the connection between two adjacent frame plates of the fixing frame 10 can also be used as a hoisting position. The positioning and hoisting function can also be achieved by simultaneously wrapping / hanging hoisting equipment (such as ropes, hooks, etc.) around / on two mutually perpendicular rod-shaped structures.

[0080] In some other alternative embodiments, the transport frame 20 may also be rotatably connected to the fixed frame 10.

[0081] Specifically, one long side of the rectangular frame of the frame 21 can be rotatably connected to the end long side of the first frame plate 111 (or the end long side of the third frame plate 113), and the other long side of the rectangular frame of the frame 21 can be detachably connected to the end long side of the third frame plate 113 (or the end long side of the first frame plate 111), thereby realizing the opening and closing of the opening of the fixing frame 10.

[0082] Specifically, taking one scenario as an example: one side of the frame 21 is rotatably connected to the end of the third frame plate 113 away from the second frame plate 112, and the other side of the frame 21 is detachably connected to the end of the first frame plate 111 away from the second frame plate 112. When it is necessary to move the pressure cylinder 2 in or out, it is only necessary to disassemble the frame 21 from the first frame plate 111 to open the opening. After completion, the two are reconnected and the opening is sealed. There is no need to perform hoisting operations on the transport frame 20, simplifying the process of moving the pressure cylinder 2 in and out and saving operation time.

[0083] It should be understood that the third frame plate 113 and the frame body 21 can be rotatably connected through a connecting structure such as hinges, and the first frame plate 111 and the frame body 21 can be detachably connected through a connecting structure such as connector 40. No specific limitations are made here.

[0084] like Figure 2 As shown, in some embodiments, the auxiliary structure 1 of the nuclear power plant pressure vessel further includes at least one support rod 30. The two ends of the support rod 30 are respectively mounted on the fixing brackets 10 on both sides of the opening, for connection to the remaining lug support 3 on the pressure vessel 2 corresponding to the opening side. This achieves the connection of all four lug supports 3 on the pressure vessel 2, further improving stability.

[0085] In this embodiment, the support rod 30 is made of I-beams, and connecting plates are welded to both ends of the rod. The connecting plates are detachably connected to the first frame plate 111 and the third frame plate 113.

[0086] Specifically, the two ends of the support rod 30 are detachably connected to the horizontal I-beams within the frames of the first frame plate 111 and the third frame plate 113. This ensures that the support rod 30, the horizontal I-beams within the rectangular frames of the three frame plates, and the horizontal rod portions 121 of the three connecting seats 12 are on the same plane. Furthermore, this does not obstruct the assembly of the transport frame 20 and the fixing frame 10.

[0087] In some alternative embodiments, one end of the support rod 30 can be rotatably connected to the first frame plate 111 or the third frame plate 113, and the other end can be detachably connected. When needed, rotating one end of the support rod 30 connects the other end to the fixing frame 10 and secures it, thus fixing the support rod 30 in place. After use, the other end of the support rod 30 is detached from the fixing frame 10, and rotating one end of the support rod 30 allows it to be stored away. This arrangement can further improve the assembly efficiency of the pressure-bearing cylinder 2 and the fixing frame 10.

[0088] When assembling the pressure-bearing cylinder 2 into the fixed frame 10, the pressure-bearing cylinder 2 must first be vertically hoisted and moved into the fixed space from the open side. This ensures that the three connecting seats 12 correspond to the three lug supports 3 respectively.

[0089] Furthermore, the three connecting seats 12 are connected to the three lug supports 3 respectively using connectors 40.

[0090] Furthermore, the two ends of the support rod 30 are connected to the horizontal I-beams within the first frame plate 111 and the third frame plate 113, respectively, and the support rod 30 is connected to the remaining lug support 3. This achieves omnidirectional fixation of the pressure-bearing cylinder 2 and initially closes the opening.

[0091] Furthermore, the transport frame 20 is hoisted and connected to the first frame plate 111 and the third frame plate 113 respectively, so that the support plate 222 of the support base 22 is in contact with the side wall of the pressure cylinder 2.

[0092] At this point, the pressure vessel 2 and the nuclear power plant pressure vessel auxiliary structure 1 are assembled. Further assembly of the pressure vessel 2 can be carried out on the assembled unit (since both the fixing frame 10 and the frame 21 are frame structures formed by connecting I-beams, some small parts can be assembled onto the pressure vessel 2 through the gaps between the I-beams). All operations such as hoisting, flipping, transportation, and storage can be performed without disassembling the nuclear power plant pressure vessel auxiliary structure 1. It will only be disassembled again when the pressure vessel 2 needs to be hoisted out at the installation and operation site.

[0093] In some embodiments, the nuclear power plant pressure vessel auxiliary structure 1 further includes at least one straight ladder 50, which is mounted on the fixed frame 10. This ladder allows personnel to move to the top of the pressure vessel 2 during assembly or other operations, eliminating the need for external lifting structures and improving worker efficiency.

[0094] Specifically, such as Figure 4 As shown, in some embodiments, the straight ladder 50 may be formed by welding multiple rod-shaped structures and welded integrally with one of the frame plates of the fixing frame 10.

[0095] In some other alternative embodiments, the ladder 50 may also be rotatably connected to the fixing frame 10. For example, a rotatable connection structure such as a hinge may be provided between the top of the ladder 50 and the top of one of the frame plates of the fixing frame 10, so that the ladder 50 can be rotatably connected to the fixing frame 10.

[0096] In some other alternative embodiments, the ladder 50 can also be detachably connected to the mounting bracket 10. For example, multiple connectors 40 are provided, so that when the ladder 50 is needed, it is fixed to the frame plate by the connectors 40, and when the ladder 50 is not needed, the connectors 40 are removed to disassemble the ladder 50.

[0097] In some other alternative embodiments, the ladder 50 can also be mounted on the mounting frame 10 by means of a hook at the top. It is hung on the mounting frame 10 when in use and easily removed when not in use.

[0098] It should be understood that the ladder 50 can be installed on only one of the frame plates, or it can be installed on each frame plate. Its location on a frame plate of the fixing frame 10 can be in the middle of the frame plate, at one end of the frame plate, or on the upper half of the frame plate, etc. No specific limitation is made here, as long as it meets the climbing function. The specific connection method between the ladder 50 and the fixing frame 10 is not limited to the examples mentioned above, as long as it allows workers to climb.

[0099] It is important to understand that the auxiliary structure 1 of the nuclear power plant pressure vessel can be made of materials such as carbon steel or stainless steel. While meeting the overall support strength requirements, the frame-type structural design can reduce the overall weight, thereby improving the economy of equipment manufacturing and the ease of hoisting. Its dimensions need to be flexibly adjusted according to the dimensions of the pressure vessel 2.

[0100] It is understood that the above embodiments only illustrate some implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. An auxiliary structure for a nuclear power plant pressure-bearing cylinder, characterized in that, include: A fixing frame (10) detachably connected to the pressure-bearing cylinder (2) defines a fixing space (15) for accommodating the pressure-bearing cylinder (2); the fixing frame (10) is cylindrical with both ends open and one side open, and the fixing space (15) is connected to the outside through the opening; the fixing frame (10) includes a frame (11) and a plurality of connecting seats (12), and the plurality of connecting seats (12) are respectively disposed on the inner side of the frame (11); At least one support rod (30), the two ends of which are respectively mounted on the fixing frame (10) on both sides of the opening; Multiple U-bolts, the support rod (30) is detachably connected to one of the lug supports (3) on the pressure-bearing cylinder (2) by at least one of the U-bolts, and each of the connecting seats (12) is detachably connected to the remaining lug supports (3) on the pressure-bearing cylinder (2) by at least one of the U-bolts; A transport frame (20) for supporting the pressure-bearing cylinder (2) during transport, the transport frame (20) covering the opening and including at least two support seats (22) for supporting the pressure-bearing cylinder (2), the at least two support seats (22) being spaced apart; The nuclear power plant pressure-bearing cylinder auxiliary structure has multiple hoisting positions. The connecting seat (12) includes an inclined rod (122) and a horizontal rod (121) for fitting with the ear support (3). The horizontal rod (121) is horizontally arranged on the inner side of the frame (11). The inclined rod (122) is inclined, with its top end connected to the frame (11) and its bottom end connected to the inner end of the horizontal rod (121). The U-bolt is inverted and fastened to the horizontal rod (121), and its two ends are detachably connected to the ear support (3).

2. The auxiliary structure for the nuclear power plant pressure-bearing cylinder according to claim 1, characterized in that, The frame (11) includes three frame plates connected in sequence, such that the cross section of the frame (11) is U-shaped, and at least one connecting seat (12) is provided on the inner side of each frame plate.

3. The auxiliary structure for the nuclear power plant pressure-bearing cylinder according to claim 1, characterized in that, The transport frame (20) also includes a frame (21) that covers the opening, and at least two support seats (22) are spaced apart on one side of the frame (21).

4. The auxiliary structure for the nuclear power plant pressure-bearing cylinder according to claim 3, characterized in that, The support base (22) includes a support frame (221) and a support plate (222) that is attached to the side wall of the pressure cylinder (2). The support frame (221) is erected on the frame (21), and the support plate (222) is located at the end of the support frame (221) away from the frame (21).

5. The auxiliary structure for the nuclear power plant pressure-bearing cylinder according to claim 4, characterized in that, A buffer layer is provided on the support base (22).

6. The auxiliary structure for the nuclear power plant pressure-bearing cylinder according to claim 1, characterized in that, The support rod (30) is detachably connected to the fixed frame (10); or one end of the support rod (30) is rotatably connected to the fixed frame (10), and the other end is detachably connected to the fixed frame (10).

7. The auxiliary structure for the nuclear power plant pressure-bearing cylinder according to claim 1, characterized in that, Both the fixed frame (10) and the transport frame (20) have multiple lifting positions; each lifting position includes multiple lifting holes and / or multiple lifting lugs (13).

8. The auxiliary structure for the nuclear power plant pressure-bearing cylinder according to claim 7, characterized in that, Both the fixing frame (10) and the transport frame (20) have multiple lifting holes; the fixing frame (10) also has multiple lifting lugs (13) on the outer side of the end away from the opening.

9. The auxiliary structure for the nuclear power plant pressure-bearing cylinder according to claim 1, characterized in that, The transport frame (20) is rotatably or detachably connected to the fixed frame (10).

10. The auxiliary structure for the nuclear power plant pressure-bearing cylinder according to claim 1, characterized in that, It also includes at least one straight ladder (50) which is mounted on the fixing frame (10).

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