Corrugated structure capable of preventing deformation

Abstract

The invention relates to the technical field of liquefied natural gas transportation, in particular to a deformation-preventing corrugated structure which comprises a corrugated plate assembly, the corrugated plate assembly comprises a first corrugated plate and a second corrugated plate which are arranged in a stacked mode, and plywood is arranged between the first corrugated plate and the second corrugated plate. Each of the first corrugated plate and the second corrugated plate is provided with two cambered surface bulges, the two cambered surface bulges are arranged in a staggered manner, and flower joints are formed at the crossed positions; the supporting pieces are arranged between the first corrugated plate and the second corrugated plate, and each supporting piece makes contact with the cambered surface protrusions of the first corrugated plate and the cambered surface protrusions of the second corrugated plate; the connecting pieces are arranged at the corresponding flower joints of the first corrugated plate and the second corrugated plate and used for connecting the first corrugated plate and the second corrugated plate and keeping the flower joints arranged at intervals.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquefied natural gas transportation, in particular to a corrugated structure for preventing deformation. BACKGROUND

[0002] Liquefied natural gas (LNG) as a clean and efficient energy source is increasingly important in the global energy structure. LNG transportation ships, as special ships for transporting liquefied natural gas, need to transport liquefied natural gas at extremely low temperatures (usually -162℃). This requires the ship structure not only to have good low-temperature performance, but also to have sufficient strength and stability to cope with complex marine environments.

[0003] During the voyage of the LNG transportation ship, it will be continuously affected by marine environmental factors such as waves, tides, and currents. Waves have a strong energy, and their periodic impact can generate a large dynamic load on the corrugated plate on the ship. When the waves impact the corrugated plate, the wave-shaped structure of the corrugated plate will cause stress concentration to be distributed at key points such as the wave crest and wave trough. Long-term exposure to this alternating stress can cause fatigue damage to the corrugated plate material, gradually causing plastic deformation.

[0004] In many corrugated structures of LNG transportation ships, multiple corrugated plates are often used in combination to meet specific design requirements or improve the overall performance of the structure. However, the existing combination methods mostly involve direct contact between two corrugated plates. When the ship is subjected to external forces during the voyage and vibrates or moves relatively, the surfaces of the two directly contacting corrugated plates will produce friction. This friction not only consumes additional energy and reduces the overall efficiency of the ship, but also causes wear and tear on the surface of the corrugated plate.

[0005] When the LNG transportation ship is subjected to strong impact from seawater, collision, or other external forces, the stability of its corrugated structure is often difficult to effectively guarantee. The huge impact force generated by the collision can cause the ship structure to deform and vibrate violently. At this time, the corrugated structure may not be able to quickly and effectively disperse and transmit these impact forces, leading to local stress concentration and further causing damage to the structure, resulting in a large amount of liquefied natural gas leakage.

[0006] Therefore, the present application develops a corrugated structure for preventing deformation to solve the problems in the prior art. SUMMARY

[0007] The purpose of the present application is to provide a corrugated structure for preventing deformation to solve the problem of insufficient stability of the corrugated plate when transporting natural gas in the prior art.

[0008] The technical solution of the present application is: a corrugated structure for preventing deformation, comprising:

[0009] A corrugated plate assembly comprises a first corrugated plate and a second corrugated plate arranged in a stack, and a plywood arranged between the first corrugated plate and the second corrugated plate, wherein the first corrugated plate and the second corrugated plate each have two arc convexes arranged alternately and forming a flower joint at an intersection position;

[0010] A support arranged between the first corrugated plate and the second corrugated plate and in contact with the arc convexes of the first corrugated plate and the second corrugated plate respectively;

[0011] A connecting piece arranged at the flower joint of the first corrugated plate and the second corrugated plate for connecting the first corrugated plate and the second corrugated plate and keeping the flower joint arranged at intervals.

[0012] Preferably, the support has a first contact surface and a second contact surface, the first contact surface is fitted with an outer wall surface of the first corrugated plate when the first corrugated plate and the second corrugated plate are installed, and the second contact surface is fitted with an inner wall surface of the second corrugated plate.

[0013] Preferably, the first contact surface and the second contact surface form a first butt joint at a bending position, and the arc convexes each form a second butt joint matched with the shape of the first butt joint at a bending position, and the first butt joint and the second butt joint are embeddedly fitted when the first corrugated plate and the second corrugated plate are installed.

[0014] Preferably, the second contact surface of each support is provided with a limiting part, and the arc convexes are provided with limiting holes, and the limiting part passes through the limiting hole when the second corrugated plate is installed, for positioning the support and the second corrugated plate and applying a pre-tightening force to the second corrugated plate.

[0015] Preferably, the limiting part comprises a contraction part and a pressing part, the contraction part is fixedly connected to the support, the pressing part is arranged at an end of the contraction part away from the support and moves along a radial direction of the contraction part to change a radial size of the limiting part, the pressing part has a fitting surface close to the second contact surface, and the fitting surface is matched with the second contact surface of the support to realize stability of the corrugated plate assembly.

[0016] Preferably, the pressing part is provided with two parts and is symmetrical to a center axis of the contraction part, the extension directions of the two pressing parts are opposite and parallel to the extension direction of the arc convexes.

[0017] Preferably, the support member has an abutment portion, and a plurality of abutment rods are provided between the abutment portion and the plywood. The plurality of abutment rods are symmetrically distributed relative to the center of the abutment portion. The fixed ends of the abutment rods are fixed to the plywood, and the free ends are hinged to the abutment portion. In addition, the abutment rods are arranged obliquely relative to the plywood.

[0018] Preferably, the fixed ends of the abutment rods are located at positions of the plywood away from a symmetry center line thereof, so that the opening directions of the two symmetrical abutment rods face the plywood.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] (1) Multiple support members are provided to contact the convex surface of the corrugated plate to provide additional support force. In addition, the first contact surface prevents the first corrugated plate from excessively expanding outward, and the second contact surface prevents the second corrugated plate from excessively shrinking inward, forming a rigid constraint system to avoid excessive local concentration of stress and effectively limit the deformation of the corrugated plate;

[0021] (2) The shrinkage part shrinks at ultra-low temperature, further compressing the second corrugated plate to prevent the appearance of gaps that affect the support effect and stability, and to avoid an increase in deformation;

[0022] (3) The abutment portion is connected to the plywood through a plurality of inclined abutment rods that are symmetrically distributed around the center. The free end of the abutment rod is hinged to the abutment portion, and the fixed end is in the area of ​​the plywood away from the symmetrical center line. When the plywood shrinks at ultra-low temperatures, the fixed end of the abutment rod moves to generate an axial force to make the support member close to the first corrugated plate, and cooperates with the clamping portion to make the second corrugated plate close to the support member, ensuring that the corrugated plate structure is tightly connected at ultra-low temperatures and when subjected to impact, preventing large deformation and ensuring overall stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0024] Figure 1 This is a schematic structural diagram of a corrugated structure for preventing deformation according to the present invention;

[0025] Figure 2 for Figure 1 A is an enlarged schematic diagram;

[0026] Figure 3 This is a schematic structural diagram of the first corrugated plate of the present invention;

[0027] Figure 4 A side view of a corrugated structure for preventing deformation according to the present invention;

[0028] Figure 5 This is a top view of a corrugated structure for preventing deformation according to the present invention.

[0029] Wherein: 1, corrugated plate assembly; 11, first corrugated plate; 12, second corrugated plate; 13, arc convex; 131, limiting hole; 14, flower section; 2, plywood; 3, support; 31, first contact surface; 32, second contact surface; 33, first butt joint; 34, second butt joint; 35, limiting part; 351, contraction part; 352, compression part; 36, abutment part; 37, abutment rod; 4, connecting piece. DETAILED DESCRIPTION

[0030] The content of the application will be further described in detail below in combination with specific embodiments:

[0031] As Figures 1-3 shown, a corrugated structure for preventing deformation, comprising a corrugated plate assembly 1, a support 3 and a connecting piece 4, wherein the corrugated plate assembly 1 is stacked by a first corrugated plate 11 and a second corrugated plate 12, and a plywood 2 is arranged between the first corrugated plate 11 and the second corrugated plate 12. Wherein the first corrugated plate 11 and the second corrugated plate 12 are the same structure, both have two arc convexes 13 arranged perpendicularly and staggered with each other, and a flower section 14 is formed at the intersection position, through this structure, the stress can be more evenly dispersed when the corrugated plate is stressed. In this embodiment, four supports 3 are arranged between the first corrugated plate 11 and the second corrugated plate 12, and connecting pieces 4 are arranged at the corresponding flower sections 14 of the first corrugated plate 11 and the second corrugated plate 12. Each support 3 is in contact with the arc convex 13 of the first corrugated plate 11 and the second corrugated plate 12, providing additional support for the corrugated plate and enhancing the stability of the entire structure. The main function of the connecting piece 4 is to prevent relative movement between the first corrugated plate 11 and the second corrugated plate 12, causing friction between the metals.

[0032] In actual application, when the LNG transport ship is impacted by waves during navigation, the support 3 can effectively resist the bending and twisting deformation of the corrugated plate, ensuring the stability of the ship structure. Through the connecting piece 4, the first corrugated plate 11 and the second corrugated plate 12 will not move relatively, avoiding the deformation caused by loose structure, and ensuring the stability of the corrugated structure during long-term use.

[0033] In this embodiment, as Figure 3As shown, the support member 3 has a first contact surface 31 and a second contact surface 32. When the first corrugated plate 11 and the second corrugated plate 12 are installed, the support member 3 is placed between the two. At this time, the first contact surface 31 will closely fit with the outer wall surface of the first corrugated plate 11, and the second contact surface 32 will closely fit with the inner wall surface of the second corrugated plate 12. The close fit ensures a stable and reliable connection between the support member 3 and the corrugated plates, providing strong support for the entire corrugated structure. At the same time, it can avoid excessive stress concentration in local areas and prevent damage to the corrugated plates or the support member 3 due to excessive local stress, greatly enhancing the support stability of the entire corrugated structure. During the navigation of the LNG carrier, the hull will be subjected to the periodic impact of waves, generating large dynamic loads. When the corrugated structure is subjected to external forces, the first corrugated plates 11 and the second corrugated plates 12 will have a corresponding deformation tendency. The support member 3 can effectively limit the deformation of the corrugated plates through the close fit between the first contact surface 31 and the second contact surface 32 and the corrugated plates. Specifically, the first contact surface 31 prevents the first corrugated plate 11 from excessively expanding and deforming outward, and the second contact surface 32 prevents the second corrugated plate 12 from excessively shrinking and deforming inward. The two work together to form a rigid constraint system.

[0034] Furthermore, the first contact surface 31 and the second contact surface 32 form a first docking portion 33 at the bend. Simultaneously, the two curved protrusions 13 also form second docking portions 34 at the bends that match the shape of the first docking portions 33. During the installation of the first corrugated plate 11 and the second corrugated plate 12, the first docking portions 33 and the second docking portions 34 will achieve an embedded fit. Compared to traditional simple contact or point connections, this large-area embedded fit makes the connection between the support member 3 and the corrugated plate more secure and reliable. When subjected to large external forces, the embedded fit structure can effectively resist external pulling and separation, preventing loosening or detachment between the support member 3 and the corrugated plate, thereby ensuring the integrity and stability of the entire corrugated structure.

[0035] like Figures 1-3 As shown, in the corrugated structure for preventing deformation, a limiting portion 35 is provided on the second contact surface 32 of each support member 3, and a limiting hole 131 is correspondingly provided on the arc-surface protrusion 13 on the second corrugated plate 12. When the second corrugated plate 12 is installed, the limiting portion 35 will accurately pass through the limiting hole 131, thereby realizing precise positioning of the support member 3 and the second corrugated plate 12. During the installation process, the operator does not need to spend a lot of time on repeated debugging and calibration, and only needs to align the limiting portion 35 with the limiting hole 131 and insert it to quickly and accurately install the corrugated plate mechanism.

[0036] Specifically, the limiting part 35 includes a contraction part 351 and a pressing part 352, the contraction part 351 is fixedly connected to the support piece 3, the pressing part 352 is arranged at the end of the contraction part 351 away from the support piece 3, and has the ability to move along the radial direction of the contraction part 351, so that the pressing part 352 can change the radial size of the entire limiting part 35, thereby realizing flexible regulation and control of installation and fixation. By applying force to the pressing part 352, the pressing part 352 is contracted, so that the limiting part 35 can pass through the limiting hole 131, the second corrugated plate 12 is installed on the first corrugated plate 11, after installation, the pressing part 352 is pulled out, or a spring is arranged in the contraction part 351 and connected to one end of the pressing part 352, the pressing part 352 is popped out by the elastic force of the spring, thereby limiting the movement of the second corrugated plate 12. In addition, the pressing part 352 is also provided with an abutting surface close to the second contact surface 32, the shape and size of the abutting surface are adapted to the second contact surface 32, and the abutting surface is tightly abutted with the second contact surface 32. In actual application process, because the transported natural gas is in liquid state, its temperature is-163℃, and it is always in super-low temperature state. The contraction part 351 will contract in the super-low temperature environment. Because the pressing part 352 is tightly abutted with the second corrugated plate 12, the contraction of the contraction part 351 will further press the second corrugated plate 12 at this time, which prevents the contraction of other structures in the super-low temperature environment from causing gaps between the second corrugated plate 12 and the support piece 3, thereby reducing the supporting effect of the second corrugated plate 12 and affecting its stability. When the first corrugated plate 11 and the second corrugated plate 12 are impacted, the deformation amount increases.

[0037] Further, the pressing part 352 is provided with two, the two pressing parts 352 are oppositely distributed with the center axis of the contraction part 351 as the axis of symmetry, and the extension directions are also opposite. The extension directions of the two pressing parts 352 are parallel to the extension direction of the arc convex 13 on the second corrugated plate 12, so that the pressing part 352 can apply force to the second corrugated plate 12 from two opposite directions when cooperating with the second corrugated plate 12. Since the extension directions of the two pressing parts 352 are parallel to the extension direction of the arc convex 13, the force can be uniformly dispersed to the entire corrugated structure along the trend of the arc convex 13 when stressed, thereby avoiding the concentration of stress in the local area and reducing the structural fatigue damage and destruction caused by stress concentration.

[0038] As Figures 4-5As shown, in order to make the support 3 and the first corrugated plate 11 more closely, and make the overall structure more stable, the support 3 is provided with an abutting portion 36, and a plurality of abutting rods 37 are arranged between the abutting portion 36 and the plywood 2 to realize connection, and the plurality of abutting rods 37 are symmetrically distributed with the center of the abutting portion 36 as the symmetric point. The specific connection mode is that the fixed end of the abutting rod 37 is stably fixed on the plywood 2, and the free end is connected with the abutting portion 36 in a hinged manner, and the abutting rod 37 is not arranged perpendicular to the plywood 2, but is in an inclined state relative to the plywood 2. At the same time, the position of the fixed end of the abutting rod 37 on the plywood 2 is in the area away from the symmetry center line of the plywood 2, so that an opening is formed between the two symmetric abutting rods 37, and the opening direction is towards the plywood 2. In actual application, because the plywood 2 will shrink to the center of itself in the ultra-low temperature environment, and because the moving range of the edge of the plywood 2 is larger, the fixed end of the abutting rod 37 arranged away from the symmetry center line of the plywood 2 will move to the center with the shrinkage of the plywood 2, so that the abutting rod 37 rotates around the free end, and when the fixed end of the abutting rod 37 moves, a force along the axial direction of the abutting rod 37 will act on the abutting portion 36, thereby generating an acting force on the support 3, so that the support 3 is close to the first corrugated plate 11. At the same time, the second corrugated plate 12 is also close to the support 3 under the action of the pressing portion 352, and under the cooperation of the abutting rod 37 and the pressing portion 352, the corrugated plate structure is still closely connected together when it is in ultra-low temperature and impacted, so as to prevent it from generating large deformation, and to ensure the stability of the whole.

[0039] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application, therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A corrugated structure for preventing deformation, characterized in that: include: A corrugated plate assembly (1), the corrugated plate assembly (1) comprising a first corrugated plate (11) and a second corrugated plate (12) which are stacked, a plywood (2) being provided between the first corrugated plate (11) and the second corrugated plate (12), wherein the first corrugated plate (11) and the second corrugated plate (12) each have two arc-surface protrusions (13), and the two arc-surface protrusions (13) are staggered and form a flower node (14) at the intersection position; Support members (3) are arranged between the first corrugated plate (11) and the second corrugated plate (12), and each of the support members (3) is in contact with the arc-surface protrusions (13) of the first corrugated plate (11) and the second corrugated plate (12); A connecting member (4) is provided at the flower nodes (14) corresponding to the first corrugated plate (11) and the second corrugated plate (12), and is used to connect the first corrugated plate (11) and the second corrugated plate (12) and maintain the interval arrangement of the flower nodes (14).

2. The corrugated structure for preventing deformation according to claim 1, characterized in that: The support member (3) has a first contact surface (31) and a second contact surface (32); when the first corrugated plate (11) and the second corrugated plate (12) are installed, the first contact surface (31) fits against the outer wall surface of the first corrugated plate (11), and the second contact surface (32) fits against the inner wall surface of the second corrugated plate (12).

3. The corrugated structure for preventing deformation according to claim 2, characterized in that: The first contact surface (31) and the second contact surface (32) form a first docking portion (33) at a bend, and the two curved protrusions (13) each form a second docking portion (34) matching the shape of the first docking portion (33) at a bend. When the first corrugated plate (11) and the second corrugated plate (12) are installed, the first docking portion (33) and the second docking portion (34) are embedded and matched.

4. The corrugated structure for preventing deformation according to claim 2, characterized in that: A limiting portion (35) is provided on the second contact surface (32) of each support member (3), and a limiting hole (131) is provided on the arc-surface protrusion (13). When the second corrugated plate (12) is installed, the limiting portion (35) passes through the limiting hole (131) to position the support member (3) and the second corrugated plate (12) and to apply a pre-tightening force to the second corrugated plate (12).

5. The corrugated structure for preventing deformation according to claim 4, characterized in that: The limiting portion (35) comprises a contraction portion (351) and a pressing portion (352), wherein the contraction portion (351) is fixedly connected to the support member (3), and the pressing portion (352) is arranged at one end of the contraction portion (351) away from the support member (3) and moves along the radial direction of the contraction portion (351) to change the radial size of the limiting portion (35), and the pressing portion (352) has a fitting surface close to the second contact surface (32), and the fitting surface is adapted to the second contact surface (32) of the support member (3) to achieve stability of the corrugated assembly.

6. The corrugated structure for preventing deformation according to claim 5, characterized in that: Two pressing portions (352) are provided and are symmetrical relative to the central axis of the contraction portion (351). The extension directions of the two pressing portions (352) are opposite and both are parallel to the extension direction of the arc-surface protrusion (13).

7. The corrugated structure for preventing deformation according to claim 1, characterized in that: The support member (3) has an abutment portion (36), and a plurality of abutment rods (37) are provided between the abutment portion (36) and the plywood (2). The plurality of abutment rods (37) are symmetrically distributed relative to the center of the abutment portion (36). The fixed ends of the abutment rods (37) are fixed to the plywood (2), and the free ends are hinged to the abutment portion (36). In addition, the abutment rods (37) are arranged obliquely relative to the plywood (2).

8. The corrugated structure for preventing deformation according to claim 7, characterized in that: The fixed ends of the abutment rods (37) are located at positions of the plywood (2) away from its symmetry center line, so that the opening directions of the two symmetrical abutment rods (37) face the plywood (2).

Images