Reactor cabin bottom structure for impact-resistant ship

Abstract

The invention discloses an anti-impact marine reactor cabin bottom structure which comprises an inner bottom plate and an outer bottom plate, and the inner bottom plate is used for being connected with the side wall of a reactor cabin to form a bottom pressure boundary of a reactor cabin containment; a plurality of rows of transverse perforated rib plates and a plurality of columns of side girders are arranged between the inner bottom plate and the outer bottom plate, and the plurality of rows of transverse perforated rib plates and the plurality of columns of side girders are arranged in a criss-cross manner to form a grating structure; a plurality of longitudinal reinforcing ribs parallel to the side girders are arranged among the side girders, and the longitudinal reinforcing ribs and the transverse perforated rib plates are arranged in a criss-cross mode. According to the anti-impact marine reactor cabin bottom structure, the inner bottom plate, the outer bottom plate, the side girders between the inner bottom plate and the outer bottom plate and the transverse perforated rib plates form a grid structure, and the structural strength and rigidity of the cabin structure under various loads are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of reactor compartment structures, and in particular to an impact-resistant bottom structure of a marine reactor compartment. Background Art

[0002] In order to meet the strength requirements of the reactor compartment structure, the bottom structure of the marine reactor compartment needs to be strengthened to meet the structural safety requirements when the bottom of the ship is impacted.

[0003] Structural reinforcement is generally carried out by replacing component materials, thickening plates, and adding reinforcing components. However, the heat dissipation performance and lightweight of the stack area cannot be guaranteed. When the stack is in an accident condition, the stack area may cause an accident due to high temperature. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a shock-resistant ship reactor compartment bottom structure, which can protect the reactor and avoid the occurrence of reactor accidents caused by impact.

[0005] To achieve the above-mentioned purpose, the present invention is designed to provide an impact-resistant shipboard reactor compartment bottom structure, comprising an inner bottom plate and an outer bottom plate, wherein the inner bottom plate is used to connect with the side wall of the reactor compartment to form a bottom pressure boundary of the reactor compartment containment vessel; a plurality of rows of transverse perforated ribs and a plurality of columns of side girders are arranged between the inner bottom plate and the outer bottom plate, and the plurality of rows of transverse perforated ribs and the plurality of columns of side girders are arranged in a criss-cross pattern to form a grid structure; a plurality of longitudinal reinforcing ribs arranged in parallel with the plurality of columns of side girders are arranged between the plurality of columns of side girders, and the longitudinal reinforcing ribs and the transverse perforated ribs are arranged in a criss-cross pattern.

[0006] Furthermore, a platform plate is provided between the middle parts of both ends of the plurality of rows of the side girders in the length direction, and the platform plate is arranged perpendicular to the side girders.

[0007] Furthermore, a plurality of first heat dissipation holes are provided at both ends of the inner bottom plate in the length direction.

[0008] Furthermore, the transverse opening ribs are provided with second heat dissipation holes which are staggered up and down.

[0009] Furthermore, the side girder is provided with third heat dissipation holes which are arranged in an up-and-down staggered manner.

[0010] Furthermore, a plurality of fourth heat dissipation holes are provided on the platform plate.

[0011] Furthermore, the transverse perforated rib is vertically arranged between the inner bottom plate and the outer bottom plate, the top end of the transverse perforated rib is welded to the inner bottom plate, and the bottom end of the transverse perforated rib is welded to the outer bottom plate.

[0012] Furthermore, the side girder is vertically arranged between the inner bottom plate and the outer bottom plate, the top end of the side girder is welded to the inner bottom plate, and the bottom end of the side girder is welded to the outer bottom plate.

[0013] Furthermore, the spacing between two adjacent longitudinal reinforcing ribs is equal, and the longitudinal reinforcing ribs are connected to the inner bottom plate, the transverse perforated rib plate and the side girder by welding.

[0014] Furthermore, the inner bottom plate and the reactor compartment containment shell are connected via an arc transition; and adjacent side walls of the reactor compartment containment shell are connected via an arc transition.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] Firstly, the impact-resistant marine reactor compartment bottom structure of the present invention connects the reactor compartment bottom structure to the inner bottom plate through a connecting structure. The welding deformation is small and easy to control during processing, assembly and welding. The welding heat affected zone is small and the mechanical properties do not decrease significantly. It can increase the structural strength design reserve and reduce the thin horse phenomenon caused by welding.

[0017] Secondly, the impact-resistant shipboard reactor cabin bottom structure of the present invention forms a grid structure through the inner bottom plate, the outer bottom plate and the side girders and transverse open ribs therebetween, thereby ensuring the structural strength and rigidity of the cabin structure under various loads (including accident loads such as high pressure and high temperature and marine environmental loads such as wave bending moment, etc.).

[0018] Thirdly, the inner bottom plate, outer bottom plate and sandwich internal grid structure of the impact-resistant marine reactor compartment bottom structure of the present invention can also serve as installation space and support for secondary shielding materials, thereby ensuring installation support for secondary shielding materials.

[0019] Fourthly, the transverse perforated ribs and side girders of the bottom structure of the impact-resistant marine reactor compartment of the present invention are provided with heat dissipation holes, thereby ensuring good heat dissipation performance of the sandwich area.

[0020] Fifthly, the present invention can effectively control the structural weight of the stack containment structure through the reasonable design of the grid structure and the internal structure, and the use of arc-transition corner structures. The stack bottom structure of the present invention can effectively solve the structural strength and rigidity problems of the square stack containment structure under high temperature, high pressure and when the bottom of the ship is impacted. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a bottom structure of a shock-resistant marine reactor compartment;

[0022] Figure 2 A schematic diagram of the internal structure of a shock-resistant marine reactor compartment bottom structure

[0023] Figure 3 is a schematic diagram of the structure of the inner bottom plate;

[0024] Figure 4 It is a schematic diagram of the arrangement structure of the transverse opening rib plate;

[0025] Figure 5 It is an enlarged structural schematic diagram of the transverse perforated rib plate;

[0026] Figure 6 The schematic diagram of the arrangement structure of the side girder is shown in FIG.

[0027] Figure 7 It is an enlarged structural diagram of the side girder;

[0028] Figure 8 It is a schematic diagram of the arrangement structure of the longitudinal reinforcement ribs;

[0029] Fig. 9 It is a schematic diagram of the enlarged structure of the platform plate;

[0030] Fig.10 is a schematic diagram of the structure of the outer bottom plate;

[0031] Fig.11 It is a schematic diagram of the transition area structure between the bottom structure of the shock-resistant marine reactor compartment and the reactor compartment containment;

[0032] In the figure: inner bottom plate 1, first heat dissipation hole 11, outer bottom plate 2, transverse perforated rib plate 3, second heat dissipation hole 31, side girder 4, third heat dissipation hole 41, longitudinal stiffener 5, platform plate 6, fourth heat dissipation hole 61, stack containment shell 7, connecting weld 8. DETAILED DESCRIPTION

[0033] The following is a detailed description of the implementation of the present invention in conjunction with the implementation cases, but they do not constitute a limitation of the present invention and are only given as examples. At the same time, the advantages of the present invention will become clearer and easier to understand through the description.

[0034] like Figure 1 and Figure 2As shown, a shock-resistant ship reactor compartment bottom structure of the present invention includes an inner bottom plate 1 and an outer bottom plate 2. The inner bottom plate 1 is used to connect with the side wall of the reactor compartment to form the bottom pressure boundary of the reactor compartment containment. A plurality of rows of transverse perforated ribs 3 and a plurality of columns of side girders 4 are arranged between the inner bottom plate 1 and the outer bottom plate 2. The plurality of rows of transverse perforated ribs 3 and the plurality of columns of side girders 4 are arranged in a crisscross pattern to form a grid structure to ensure the structural strength and rigidity of the cabin structure under various loads. The cavity formed by the inner bottom plate, the outer bottom plate and the side girders can also serve as the installation space and support for the secondary shielding material. A plurality of longitudinal reinforcing ribs 5 arranged parallel to the plurality of columns of side girders 4 are arranged between the plurality of columns of side girders 4 in a crisscross pattern. A platform plate 6 is arranged between the middle of the two ends of the plurality of columns of side girders 4 in the length direction. The platform plate 6 is arranged perpendicular to the side girders 4.

[0035] like Figure 3 As shown, a plurality of first heat dissipation holes 11 are provided at both ends of the inner bottom plate 1 in the length direction. The inner bottom plate 1 is made of an integral extruded plate, and forms a closed cabin space with the other five surfaces of the cabin wall, forming the pressure boundary of the cabin containment. The whole plate is a square plane plate, and an arc transition type is adopted between adjacent pressure-bearing wall panels to reduce stress concentration in the corner area. The inner bottom plate 1 and the other wall panels should be fully welded. The thickness of the inner bottom plate 1 is generally 26mm, the thickness of the arc transition zone is 20mm~24mm, the arc radius is 500mm, and the actual thickness of the inner bottom plate is determined according to the internal pressure size.

[0036] like Figure 4 and Figure 5 As shown, the transverse perforated ribs 3 are provided with second heat dissipation holes 31 arranged in an up-and-down staggered manner. The transverse perforated ribs 3 are vertically arranged between the inner bottom plate 1 and the outer bottom plate 2, the top of the transverse perforated ribs 3 are welded to the inner bottom plate 1, and the bottom of the transverse perforated ribs 3 are welded to the outer bottom plate 2. In this embodiment, the transverse perforated ribs 3 vertically penetrate the entire bottom sandwich structure, and are arranged according to the rib position in the entire stack area. The plates are alternately provided with openings at two height positions to connect the entire longitudinal cabin under the stack.

[0037] like Figure 6 and Figure 7As shown, the side girder 4 is provided with third heat dissipation holes 41 which are arranged alternately up and down. The side girder 4 is arranged vertically between the inner bottom plate 1 and the outer bottom plate 2. The top end of the side girder 4 is welded to the inner bottom plate 1, and the bottom end of the side girder 4 is welded to the outer bottom plate 2. In this embodiment, the thickness of the side girder 4 is generally 12 mm. The side girder 4 is connected to the inner bottom plate 1 and the longitudinal stiffeners 5 which are arranged equidistantly in the interlayer area by welding, and forms a grid structure with the transverse perforated ribs 3. The side girder 4 vertically runs through the entire bottom interlayer structure, and the three side girder 4 divides the lower interlayer of the stack compartment into three parts; the side girder 4 runs through the entire bottom interlayer structure, and heat dissipation holes at two height positions are alternately arranged on the plate to connect the bottom cabin with the side cabin.

[0038] like Figure 8 As shown, a plurality of longitudinal reinforcing ribs 5 are arranged in parallel, and the spacing between two adjacent longitudinal reinforcing ribs 5 is equal. The longitudinal reinforcing ribs 5 are connected to the inner bottom plate 1, the transverse perforated rib plate 3 and the side girder 4 by welding. In this embodiment, the longitudinal reinforcing ribs 5 are arranged equidistantly in the longitudinal direction in the bottom structure, and are connected to the inner bottom plate, the side girder and the transverse perforated rib plate by welding to provide structural reinforcement for the bottom structure. The spacing of the longitudinal reinforcing ribs 5 is determined by comprehensively considering the pressure bearing size, the connection with the surrounding platform and the construction feasibility of the grid cavity, and is generally taken as 1m to 2m.

[0039] like Fig. 9 As shown, a plurality of fourth heat dissipation holes 61 are provided on the platform plate 6. The platform plate 6 is connected to the side girder 4 by welding to provide structural reinforcement for the bottom structure. The heat dissipation holes ensure good heat dissipation performance of the bottom structure.

[0040] like Fig.10 As shown, the outer bottom plate of this embodiment is a flat plate structure, the thickness of the outer bottom plate is 22 mm, and the outer bottom plate is welded to the side girders and the transverse perforated ribs.

[0041] like Fig.11 As shown, the inner bottom plate 1 and the reactor containment shell 7 are connected by an arc transition; the adjacent side walls of the reactor containment shell 7 are connected by an arc transition. The plates and welding materials of the reactor containment shell structure are made of 921A high-strength hull steel with radiation resistance and its matching welding materials. The structural weight of the reactor containment shell structure can be effectively controlled through the reasonable design of the grid structure and the internal structure, and the use of the arc transition corner structure type. The bottom structure of the reactor can effectively solve the structural strength and stiffness problems of the square reactor containment shell structure under high temperature, high pressure and impact on the bottom of the ship.

[0042] The above are only specific embodiments of the present invention. It should be pointed out that any changes or substitutions that can be easily thought of by any technician familiar with the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. The rest not described in detail are prior arts.

Claims

1. A shock-resistant marine reactor compartment bottom structure, characterized in that: The invention comprises an inner bottom plate (1) and an outer bottom plate (2), wherein the inner bottom plate (1) is used to be connected to the side wall of the reactor compartment to form the bottom pressure boundary of the reactor compartment containment shell; a plurality of rows of transverse perforated ribs (3) and a plurality of columns of side girders (4) are arranged between the inner bottom plate (1) and the outer bottom plate (2), and the plurality of rows of transverse perforated ribs (3) and the plurality of columns of side girders (4) are arranged in a crisscross manner to form a grid structure; a plurality of longitudinal reinforcing ribs (5) arranged parallel to the plurality of columns of side girders (4) are arranged between the plurality of columns of side girders (4), and the plurality of longitudinal reinforcing ribs (5) and the plurality of rows of transverse perforated ribs (3) are arranged in a crisscross manner.

2. The shock-resistant marine reactor compartment bottom structure according to claim 1, characterized in that: A platform plate (6) is provided between the middle parts of both ends of a plurality of rows of the side girders (4) in the length direction, and the platform plate (6) is arranged perpendicular to the side girders (4).

3. The shock-resistant marine reactor compartment bottom structure according to claim 2 is characterized in that: A plurality of first heat dissipation holes (11) are provided at both ends of the inner bottom plate (1) in the length direction.

4. The shock-resistant marine reactor compartment bottom structure according to claim 3 is characterized in that: The transverse perforated rib plate (3) is provided with second heat dissipation holes (31) which are arranged in an up-and-down staggered manner.

5. The shock-resistant marine reactor compartment bottom structure according to claim 4 is characterized in that: The side girder (4) is provided with third heat dissipation holes (41) which are arranged in an up-and-down staggered manner.

6. The shock-resistant marine reactor compartment bottom structure according to claim 5, characterized in that: The platform plate (6) is provided with a plurality of fourth heat dissipation holes (61).

7. The shock-resistant ship reactor compartment bottom structure according to any one of claims 1 to 6, characterized in that: The transverse perforated rib plate (3) is vertically arranged between the inner bottom plate (1) and the outer bottom plate (2); the top end of the transverse perforated rib plate (3) is welded to the inner bottom plate (1), and the bottom end of the transverse perforated rib plate (3) is welded to the outer bottom plate (2).

8. The shock-resistant ship reactor compartment bottom structure according to any one of claims 1 to 6, characterized in that: The side girder (4) is vertically arranged between the inner bottom plate (1) and the outer bottom plate (2); the top end of the side girder (4) is welded to the inner bottom plate (1), and the bottom end of the side girder (4) is welded to the outer bottom plate (2).

9. The shock-resistant ship reactor compartment bottom structure according to any one of claims 1 to 6, characterized in that: The spacing between two adjacent longitudinal reinforcing ribs (5) is equal, and the longitudinal reinforcing ribs (5) are connected to the inner bottom plate (1), the transverse perforated rib plate (3) and the side girder (4) by welding.

10. The shock-resistant ship reactor compartment bottom structure according to any one of claims 1 to 6, characterized in that: The inner bottom plate (1) and the stack containment shell (7) are connected via an arc transition; and adjacent side walls of the stack containment shell (7) are connected via an arc transition.

Images