Leveling and stabilizing device for replacing top cover of reactor pressure vessel

Abstract

The utility model discloses a leveling and stabilizing device for replacing a top cover of a reactor pressure vessel, which is used for replacing a top cover component of the reactor pressure vessel, and the top cover component of the reactor pressure vessel comprises a reactor top structure, a control rod driving mechanism and the top cover of the reactor pressure vessel, the reactor top structure comprises a plurality of suspenders connected with the top cover of the reactor pressure vessel, and is characterized in that the leveling and stabilizing device for replacing the top cover of the reactor pressure vessel comprises a stabilizing part in a closed ring shape; and each adjusting assembly comprises a limiting hole used for allowing the hanging rod to penetrate through, and the multiple adjusting assemblies are all connected to the stabilizing piece. The leveling and stabilizing device for replacing the top cover of the reactor pressure vessel can effectively prevent the suspender from inclining and twisting.

Description

Technical Field

[0001] This utility model relates to the field of reactor pressure vessel technology, and in particular to a leveling and stabilizing device for replacing the top cover of a reactor pressure vessel. Background Technology

[0002] In related technologies, the reactor body consists of the reactor pressure vessel (RPV), in-core components, control rod drive mechanism (CRDM), core components, core instrumentation, and related components. The reactor pressure vessel is the pressure boundary of the primary loop of the nuclear power plant reactor, and the reactor pressure vessel shell and the reactor pressure vessel top cover together constitute the second safety barrier of the nuclear power plant.

[0003] The reactor pressure vessel top cover requires regular maintenance or replacement after prolonged use. Replacing the reactor pressure vessel top cover involves separating the reactor top structure from the top cover. Specifically, this separation begins with separating the boom from the reactor pressure vessel top cover. During boom disassembly, the boom of the reactor top structure is prone to tilting or twisting, which could potentially cause the boom to collide with surrounding objects. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a leveling and stabilizing device for replacing the top cover of a reactor pressure vessel, which can effectively prevent the lifting rod from tilting and twisting.

[0005] A leveling and stabilizing device for replacing the reactor pressure vessel top cover according to an embodiment of the present invention is used for replacing the reactor pressure vessel top cover assembly. The reactor pressure vessel top cover assembly includes a reactor top structure, a control rod drive mechanism, and a reactor pressure vessel top cover. The reactor top structure includes a plurality of lifting rods connected to the reactor pressure vessel top cover. The leveling and stabilizing device for replacing the reactor pressure vessel top cover is characterized in that it includes:

[0006] The stabilizing component is a closed ring.

[0007] Multiple adjustment components, each including a limiting hole for the boom to pass through, and all of the multiple adjustment components are connected to the stabilizer.

[0008] The leveling and stabilizing device for replacing the reactor pressure vessel top cover according to an embodiment of the present invention has at least the following beneficial effects: the reactor top structure includes multiple lifting rods, wherein each adjusting component of the leveling and stabilizing device for replacing the reactor pressure vessel top cover can be sleeved on each lifting rod, and the adjusting component is connected to a closed annular stabilizing member. Thus, when the lifting rods are disassembled, they are constrained by the leveling and stabilizing device for replacing the reactor pressure vessel top cover, thereby effectively preventing the lifting rods from tilting or twisting. Specifically, the leveling and stabilizing device for replacing the reactor pressure vessel top cover can effectively prevent the lifting rods from tilting and twisting.

[0009] According to some embodiments of the present invention, a leveling and stabilizing device for replacing the top cover of a reactor pressure vessel includes an adjusting component comprising a sleeve, a mounting component, and an adjusting component. The sleeve has the limiting hole, the mounting component is connected to the stabilizing component, the mounting component has a mounting hole, the sleeve is disposed in the mounting hole, and the adjusting component is connected to the mounting component. The adjusting component is used to drive the sleeve to move so that the sleeve drives the boom to move radially.

[0010] According to some embodiments of the present invention, a leveling and stabilizing device for replacing the top cover of a reactor pressure vessel is provided. The mounting component has at least two oppositely arranged side walls, and the adjusting component is threadedly connected to the at least two oppositely arranged side walls. One end of the adjusting component extends into the mounting hole and abuts against the outer wall of the sleeve.

[0011] Alternatively, the mounting member has at least two opposing sidewalls, the adjusting member passes through the two opposing sidewalls and the interior of the sleeve member, and the adjusting member is threadedly connected to the sidewalls.

[0012] According to some embodiments of the present invention, a leveling and stabilizing device for replacing the top cover of a reactor pressure vessel includes multiple adjusting members arranged circumferentially around the mounting member.

[0013] According to some embodiments of the present invention, a leveling and stabilizing device for replacing the top cover of a reactor pressure vessel includes a first part and a second part, wherein the first part and the second part are mated together, and the opposite sides of the two parts together form the mounting hole.

[0014] According to some embodiments of the present invention, a leveling and stabilizing device for replacing the top cover of a reactor pressure vessel includes an adjusting component that further includes a limiting member connected to the wall of the mounting hole and abutting against the upper or lower end of the sleeve.

[0015] According to some embodiments of the present invention, a leveling and stabilizing device for replacing the top cover of a reactor pressure vessel is provided, wherein the upper end of the sleeve is configured as a circular structure and the lower end of the sleeve is configured as a square structure.

[0016] According to some embodiments of the present invention, the reactor pressure vessel top cover replacement leveling and stabilizing device further includes a counterweight connected to the stabilizing member, so that the center of gravity of the reactor top structure is located on its own central axis.

[0017] According to some embodiments of the present invention, the reactor pressure vessel top cover replacement leveling and stabilizing device further includes a guide member connected to the stabilizing member, and the first end of the guide member is used to connect to the reactor pressure vessel top cover.

[0018] According to some embodiments of the present invention, the leveling and stabilizing device for replacing the top cover of a reactor pressure vessel, wherein the guide member further has a second end opposite to the first end, and the second end is configured as a conical structure.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic diagram showing the leveling and stabilizing device for replacing the reactor pressure vessel top cover connected to the reactor pressure vessel top cover assembly, according to some embodiments of the present invention.

[0022] Figure 2 This is a schematic diagram of a leveling and stabilizing device and a lifting rod for replacing the reactor pressure vessel top cover according to some embodiments of the present invention;

[0023] Figure 3 This is a partial schematic diagram of a leveling and stabilizing device for replacing the top cover of a reactor pressure vessel according to some embodiments of the present invention.

[0024] Figure 4 A cross-sectional view of the adjusting component in the leveling and stabilizing device for replacing the reactor pressure vessel top cover according to some embodiments of the present invention.

[0025] Figure 5 This is a schematic diagram of the guide fitting on the connecting part of the leveling and stabilizing device for replacing the top cover of the reactor pressure vessel in some embodiments of this utility model.

[0026] Figure label:

[0027] The reactor pressure vessel top cover replacement leveling and stabilizing device 10, reactor top structure 20, boom 30, reactor pressure vessel top cover 40, stabilizing component 100, adjusting component 200, sleeve 210, mounting component 220, mounting hole 221, first component 222, second component 223, adjusting component 240, limiting component 250, connecting component 300, and guide component 400. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do 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. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] In related technologies, the reactor body consists of the reactor pressure vessel (RPV), in-core components, control rod drive mechanism (CRDM), core components, core instrumentation, and related components. The reactor pressure vessel is the pressure boundary of the primary loop of the nuclear power plant reactor. The reactor pressure vessel shell and the reactor pressure vessel top cover together constitute the second safety barrier of the nuclear power plant.

[0034] The reactor pressure vessel top cover 40 requires periodic maintenance or replacement after long-term use. When replacing the reactor pressure vessel top cover 40, the reactor top structure 20 and the reactor pressure vessel top cover 40 are separated. Specifically, during separation, the boom 30 must first be separated from the reactor pressure vessel top cover 40. During the disassembly of the boom 30, the boom 30 of the reactor top structure 20 is prone to tilting or twisting, which may cause the boom 30 to collide with surrounding objects. Therefore, this application proposes a leveling and stabilizing device 10 for replacing the reactor pressure vessel top cover.

[0035] Please refer to Figures 1 to 5 , Figure 1 A schematic diagram of the leveling and stabilizing device 10 for replacing the reactor pressure vessel top cover connected to the reactor pressure vessel top cover assembly; Figure 2 A schematic diagram of the leveling and stabilizing device 10 and the boom 30 used for replacing the top cover of the reactor pressure vessel; Figure 3 4 is a partial schematic diagram of the leveling and stabilizing device 10 for replacing the reactor pressure vessel top cover; 5 is a cross-sectional view of the adjusting component 200 in the leveling and stabilizing device 10 for replacing the reactor pressure vessel top cover. Figure 5 This is a schematic diagram of the guide 400 fitted onto the connector 300 in the leveling and stabilizing device 10 for replacing the reactor pressure vessel top cover. The leveling and stabilizing device 10 is used for replacing the reactor pressure vessel top cover assembly, which includes a reactor top structure 20, a control rod drive mechanism, and a reactor pressure vessel top cover 40. The reactor top structure 20 includes multiple booms 30, and the reactor pressure vessel top cover 40 is connected to the booms 30. For example, one end of a boom 30 has a U-shaped block, and the U-shaped block is connected to the reactor pressure vessel top cover 40 via a pin. When one end of a boom 30 has a U-shaped block, the upper end of the fitting 210 is set as a circular structure, and the lower end is set as a square structure. The square structure can be adapted to the U-shaped block, and the circular structure can be adapted to the rod portion of the boom 30, which facilitates the fitting 210 in limiting the position of the boom 30. Since there are multiple booms 30, when removing one boom 30, the pin may pop out, causing the boom 30 to tilt and twist, which could lead to the boom 30 damaging surrounding objects. The leveling and stabilizing device 10 for replacing the reactor pressure vessel top cover can effectively prevent the boom 30 from tilting and twisting. For details, please refer to... Figure 1 and Figure 2In some embodiments, the leveling and stabilizing device 10 for replacing the reactor pressure vessel top cover includes a stabilizing element 100 and multiple adjusting components 200. The multiple adjusting components 200 are all fixedly connected to the stabilizing element 100, which is a closed ring, such as a circular ring or a square ring. For example, the stabilizing element 100 can be formed by connecting four seamless steel pipes with a diameter of 60mm, each seamless steel pipe having two lifting lugs, which facilitates the hoisting of the stabilizing element 100. Furthermore, the stabilizing element 100 can be made of steel pipes, steel bars, steel plates, or square steel, etc.

[0036] Please refer to Figure 2 Each adjusting component 200 is used to mount one lifting rod 30. That is, each of the first adjusting components 200 includes a limiting hole for the lifting rod 30 to pass through. The wall of the limiting hole limits the horizontal movement of the lifting rod 30, preventing it from tilting during the replacement of the reactor pressure vessel top cover 40. Specifically, the reactor top structure 20 includes multiple lifting rods 30, wherein each adjusting component 200 in the reactor pressure vessel top cover replacement leveling and stabilizing device 10 can be mounted on each lifting rod 30, and the adjusting component 200 is connected to the stabilizing member 100. In the prior art, after the pin is removed, one end of the lifting rod 30 is unrestrained, thus the lifting rod 30 may tilt or twist. In this application, when the boom 30 is disassembled, it is constrained by the leveling and stabilizing device 10 for replacing the reactor pressure vessel top cover. The stabilizing element 100 is a closed loop with high structural strength. When the boom 30 tends to tilt or twist, the adjusting component 200 is restricted by the stabilizing element 100 and will not tilt or twist with the boom 30. Simultaneously, the boom 30 is limited by the wall of the limiting hole, effectively preventing the boom 30 from tilting or twisting. Specifically, the leveling and stabilizing device 10 for replacing the reactor pressure vessel top cover effectively prevents the boom 30 from tilting and twisting.

[0037] It should be noted that the leveling and stabilizing device 10 for replacing the reactor pressure vessel top cover has two application scenarios. One scenario is when the boom 30 and reactor pressure vessel top cover 40 need to be disassembled; during disassembly, the boom 30 can be effectively prevented from tilting or twisting. The other scenario is when the reactor pressure vessel top cover 40 and reactor top structure 20 are being installed, before the boom 30 is installed on the reactor pressure vessel top cover 40; in this case, the leveling and stabilizing device 10 can effectively prevent the boom 30 from tilting or twisting. Furthermore, the leveling and stabilizing device 10 can be used not only in the reactor pressure vessel top cover 40 replacement process but also in other processes requiring the disassembly of the reactor top structure 20 or the replacement of the control rod drive mechanism.

[0038] Furthermore, when installing or removing the boom 30 and the reactor pressure vessel top cover 40, the holes in the boom 30 and the reactor pressure vessel top cover 40 need to be aligned to allow the pin to pass through. To facilitate installation and removal, the position of the boom 30 can be adjusted using the adjusting assembly 200. That is, the adjusting assembly 200 can also adjust the position of the boom 30, overcoming the defects of the pin getting stuck or popping out during the installation and removal of the boom 30. For details, please refer to... Figure 1 , Figure 3 and Figure 4 In some embodiments, the adjusting assembly 200 includes a sleeve 210, a mounting member 220, and an adjusting member 240. The sleeve 210 is used to mount the boom 30. Specifically, the boom 30 has a U-shaped block at its end, and the sleeve 210 has a limiting hole through which one end of the boom 30 passes, with the U-shaped block abutting against the inner surface of the sleeve 210. A rubber pad can be provided on the sleeve 210 to protect the boom 30. After the sleeve 210 is mounted on the boom 30, it can restrict the radial movement of the boom 30, thereby effectively preventing the boom 30 from tilting or twisting. The mounting member 220 is fixedly connected to the stabilizing member 100; for example, the mounting member 220 can be fitted onto the stabilizing member 100 and welded. Mounting member 220 has mounting hole 221, and socket 210 is disposed in mounting hole 221. After socket 210 is located in mounting hole 221, socket 210 can move within mounting hole 221. Adjusting member 240 is connected to mounting member 220 and is used to drive socket 210 to move, so that socket 210 drives lifting rod 30 to move radially. Specifically, when the position of lifting rod 30 is inconvenient for disassembly or assembly, the adjusting member 240 can drive socket 210 to move, socket 210 abuts against lifting rod 30 and drives lifting rod 30 to move, which can adjust the position of lifting rod 30, thereby facilitating disassembly or assembly of lifting rod 30.

[0039] Furthermore, the connection method between the adjusting member 240 and the mounting member 220 is described below, thereby specifically illustrating how the adjusting member 240 drives the movement of the socket 210. Please refer to... Figure 3In some embodiments, the adjusting member 240 and the mounting member 220 are threadedly connected. The adjusting member 240 can be a bolt, or the adjusting member 240 can be threaded, and the mounting member 220 is provided with a threaded hole, thereby realizing the threaded connection between the adjusting member 240 and the mounting member 220. That is, the mounting member 220 has at least two oppositely arranged sidewalls, and the adjusting member 240 is threadedly connected to at least two oppositely arranged sidewalls. One end of the adjusting member 240 extends into the mounting hole 221 and abuts against the outer wall of the sleeve 210. Rotating the adjusting member 240 allows it to approach and abut against the sleeve 210 to move. Alternatively, the mounting member 220 has at least two oppositely arranged sidewalls, the adjusting member 240 passes through the two oppositely arranged sidewalls and the interior of the sleeve 210, the adjusting member 240 is fixedly connected to the sleeve 210, and the adjusting member 240 is threadedly connected to the sidewalls. In some embodiments, the adjusting member 240 can be rotated to move the fixedly connected sleeve 210. In other embodiments, the adjusting member 240 can be slidably connected to the mounting member 220, and the adjusting member 240 can also be pushed to move the sleeve 210, thus realizing the movement of the boom 30.

[0040] Further, please refer to Figure 3 In some embodiments, there are multiple adjusting members 240 arranged circumferentially around the mounting member 220. Specifically, the mounting member 220 can be square in shape and has four planes. There can be eight, twelve, or sixteen adjusting members 240, with two, three, or four adjusting members 240 connected to each plane. This arrangement of multiple adjusting members 240 allows the socket 210 to move in four directions. Alternatively, the mounting member 220 can be circular in shape, with the multiple adjusting members 240 arranged in a ring around the center of the mounting member 220, allowing the socket 210 to move in any direction. Furthermore, since both the socket 210 and the sidewalls of the mounting member 220 are planar, the installation of the adjusting members 240 on the mounting member 220 and their contact with the surface of the socket 210 are more stable.

[0041] Further, please refer to Figure 3In some embodiments, the mounting member 220 includes a first member 222 and a second member 223. The first member 222 and the second member 223 are mated together. Specifically, the first member 222 can be bolted to the second member 223. The opposing sides of the first member 222 and the second member 223 together form a mounting hole 221. When the mounting hole 221 is circular, the first member 222 has a semi-circular groove, and the second member 223 has a semi-circular groove. After the first member 222 and the second member 223 are connected, the two grooves mate to form the mounting hole 221. After the sleeve member 210 is fitted onto the hanger rod 30, the first member 222 can surround a portion of the sleeve member 210, and then the second member 223 can surround the other portion of the sleeve member 210, thereby connecting the first member 222 and the second member 223, and placing the sleeve member 210 in the mounting hole 221. The separate design of the first member 222 and the second member 223 facilitates use. It is conceivable that the socket 210 can also adopt a separate structure, which makes it convenient for the socket 210 to be fitted onto the rod 30. The separate design of the socket 210 can refer to the design of the first piece 222 and the second piece 223, which will not be elaborated further here.

[0042] Further, please refer to Figure 3 In some embodiments, the adjusting assembly 200 further includes a limiting member 250, which is connected to the wall of the mounting hole 221 and abuts against the upper or lower end of the socket 210. Specifically, in some cases, the socket 210 is located in the mounting hole 221 by fitting the mounting member 220 onto the socket 210. In this case, the mounting member 220 may pass through the socket 210, which may make it inconvenient for the adjusting assembly 240 to drive the socket 210 to move. Therefore, by providing a limiting member 250 on the wall of the mounting hole 221, when the limiting member 250 abuts against the upper surface of the socket 210, it can be known that the mounting member 220 is properly fitted onto the socket 210, which can also improve installation efficiency.

[0043] Furthermore, in some embodiments, the leveling and stabilizing device 10 for replacing the reactor pressure vessel top cover also includes a counterweight connected to the stabilizing member 100. Specifically, the counterweight can be detachably connected to the stabilizing member 100, and the counterweight can further effectively prevent the boom 30 from tilting or twisting. The counterweight also ensures that the center of gravity of the reactor top structure 20 is on the central axis.

[0044] Further, please refer to Figure 5In some embodiments, the leveling and stabilizing device 10 for replacing the reactor pressure vessel top cover further includes a connector 300 and a guide 400. The guide 400 has a length between 2500 mm and 4000 mm, a diameter between 140 mm and 160 mm, and can be a hollow tube to reduce weight; its wall thickness is between 15 mm and 25 mm. The connector 300 is connected to the stabilizer 100. The first end of the guide 400 is used to connect to the reactor pressure vessel top cover 40. Specifically, the bottom of the guide 400 has a connecting structure for connecting to the main bolt hole of the reactor pressure vessel top cover 40. To protect the main bolt hole, a transition pad made of polytetrafluoroethylene is installed between the connecting structure and the main bolt hole. The connector 300 is sleeved on the guide 400, thus connecting the guide 400 to the stabilizer 100. Specifically, the guide member 400 serves a guiding function. For example, when installing the leveling and stabilizing device 10 to replace the reactor pressure vessel top cover, the guide member 400 can be installed on the reactor pressure vessel top cover 40 first. Then, the connector 300 can be fitted onto the guide member 400 to align the sleeve 210 with the position of the lifting rod 30. After that, the lifting rod 30 only needs to be fixed. Similarly, when it is necessary to install the lifting rod 30 and the reactor pressure vessel top cover 40, the connector 300 can be fitted onto the guide member 400 to achieve the positioning of the lifting rod 30 and the reactor pressure vessel top cover 40.

[0045] Further, please refer to Figure 5 In some embodiments, the second end of the guide member 400 is configured as a tapered structure, with the second end facing away from the first end. The tapered structure facilitates the insertion of the connector 300 through the guide member 400, thus making it easy to fit the connector 300 onto the guide member 400. The slope of the tapered surface is between 30° and 45°. A lifting ring may be provided at the top of the guide member 400.

[0046] Furthermore, in some embodiments, there are multiple connectors 300 and guides 400, with multiple connectors 300 arranged circumferentially around the center of the stabilizer 100, and each connector 300 fitted onto one guide 400. Specifically, there can be multiple guides 400, such as three, and correspondingly, there are also three connectors 300. In this way, each connector 300 can be fitted onto one guide 400, which can more accurately achieve the guiding function and facilitate the installation of the leveling and stabilizing device 10 for replacing the reactor pressure vessel top cover.

[0047] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A leveling and stabilizing device for replacing the reactor pressure vessel top cover assembly, wherein the reactor pressure vessel top cover assembly includes a reactor top structure, a control rod drive mechanism, and a reactor pressure vessel top cover, and the reactor top structure includes multiple lifting rods connected to the reactor pressure vessel top cover, characterized in that, The leveling and stabilizing device for replacing the reactor pressure vessel top cover includes: The stabilizing component is a closed ring. Multiple adjustment components, each including a limiting hole for the boom to pass through, and all of the multiple adjustment components are connected to the stabilizer.

2. The leveling and stabilizing device for replacing the reactor pressure vessel top cover according to claim 1, characterized in that, The adjustment assembly includes a socket, a mounting member, and an adjusting member. The socket has the limiting hole. The mounting member is connected to the stabilizing member and has a mounting hole. The socket is disposed in the mounting hole. The adjusting member is connected to the mounting member and is used to drive the socket to move so that the socket drives the boom to move radially.

3. The leveling and stabilizing device for replacing the reactor pressure vessel top cover according to claim 2, characterized in that, The mounting component has at least two opposing sidewalls, and the adjusting component is threadedly connected to the at least two opposing sidewalls. One end of the adjusting component extends into the mounting hole and abuts against the outer wall of the sleeve. Alternatively, the mounting member has at least two opposing sidewalls, the adjusting member passes through the two opposing sidewalls and the interior of the sleeve member, and the adjusting member is threadedly connected to the sidewalls.

4. The leveling and stabilizing device for replacing the reactor pressure vessel top cover according to claim 2, characterized in that, The adjusting member is a plurality of such adjusting members, which are arranged circumferentially around the mounting member.

5. The leveling and stabilizing device for replacing the reactor pressure vessel top cover according to claim 2, characterized in that, The mounting component includes a first component and a second component, which are mated together, and their opposing sides together form the mounting hole.

6. The leveling and stabilizing device for replacing the reactor pressure vessel top cover according to claim 2, characterized in that, The adjustment assembly further includes a limiting member, which is connected to the wall of the mounting hole and abuts against the upper or lower end of the sleeve.

7. The leveling and stabilizing device for replacing the reactor pressure vessel top cover according to claim 2, characterized in that, The upper end of the socket is circular, and the lower end of the socket is square.

8. The leveling and stabilizing device for replacing the reactor pressure vessel top cover according to claim 1, characterized in that, The leveling and stabilizing device for replacing the reactor pressure vessel top cover also includes a counterweight connected to the stabilizing element, so that the center of gravity of the reactor top structure is located on its own central axis.

9. The leveling and stabilizing device for replacing the reactor pressure vessel top cover according to claim 1, characterized in that, The leveling and stabilizing device for replacing the reactor pressure vessel top cover also includes a guide member connected to the stabilizing member, and the first end of the guide member is used to connect to the reactor pressure vessel top cover.

10. The leveling and stabilizing device for replacing the reactor pressure vessel top cover according to claim 9, characterized in that, The guide member also has a second end opposite to the first end, and the second end is configured as a tapered structure.

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