Corner structure for transverse bulkhead platform of LNG (liquefied natural gas) filling ship and mounting method of corner structure

Abstract

The invention relates to the technical field of LNG ship manufacturing, in particular to a corner structure for a transverse bulkhead platform of an LNG filling ship and a mounting method of the corner structure. The corner structure for the transverse bulkhead platform of the LNG filling ship comprises a corner structure body defined by a transverse bulkhead plate, a bulkhead platform plate, a broadside platform plate and a longitudinal wall plate, the transverse bulkhead plate is fixed to an upper side wall plate and a lower side wall plate, and the broadside platform plate is provided with an extending edge extending outwards to be in butt joint with a bulkhead inner platform at the position of a transverse bulkhead. An arc notch is formed in the butt joint corner, and a blocking plate for blocking the arc notch is arranged on the transverse bulkhead plate. The stress concentration at the corner is avoided by forming the arc notch, namely the negative corner, in the platform plate, at the moment, the local structure at the corner does not bear large concentrated stress any more, the anti-fatigue performance is improved, and then the problems that in the prior art, arc transition cannot be adopted on an LNG filling ship, and stress concentration can be caused by conventional design are solved.

Description

Technical Field

[0001] This invention relates to the field of LNG ship manufacturing technology, and in particular to a corner structure for a transverse bulkhead platform of an LNG bunkering vessel and its installation method. Background Technology

[0002] In typical ship structural design, transverse bulkheads typically use rounded tangents at the corners of continuous platforms to reduce stress concentration and structural damage. However, on LNG bunkering vessels, insulation layers need to be installed on the hull of the cargo tanks, requiring the hull structure to be as flat as possible, especially at corners where there should be no protrusions. Therefore, rounded transitions at the corners are not suitable, but conventional design methods cannot meet these requirements. Summary of the Invention

[0003] In view of this, the present invention provides a corner structure for a transverse bulkhead platform of an LNG bunkering vessel to solve the problem that in the prior art, a circular arc transition cannot be used on LNG bunkering vessels, while conventional designs would lead to stress concentration; the present invention also provides an installation method for the corner structure for a transverse bulkhead platform of a bunkering vessel to solve the above-mentioned technical problems.

[0004] A corner structure for a transverse bulkhead platform of an LNG bunkering vessel includes a corner structure formed by a transverse bulkhead, a bulkhead platform plate, a side platform plate, and a longitudinal bulkhead. The side platform plate divides the longitudinal bulkhead into an upper side plate and a lower side plate. The transverse bulkhead is fixed to the upper and lower side plates. The side platform plate has an extension edge at the transverse bulkhead that extends outward to dock with the platform inside the bulkhead. The docking corner has an arc notch. A sealing plate is provided on the transverse bulkhead to seal the arc notch.

[0005] Furthermore, the sealing plate is provided with a plug groove that is adapted to the extension edge for insertion of the extension edge.

[0006] Furthermore, the sealing plate is a sector-shaped plate, and the center of the sector-shaped plate is located at the corner of the upper side wall and the lower side wall.

[0007] Furthermore, the extension length of the extended edge is 100-150mm.

[0008] The beneficial effects of the corner structure for the transverse bulkhead platform of the LNG bunkering vessel in this invention are as follows: Since a right angle would cause significant stress concentration at the corner structure during contact, this invention avoids stress concentration at the corner by setting arc-shaped notches on the side platform and the transverse bulkhead platform. Then, a sealing plate is installed to seal the avoidance notch, effectively sealing the transverse bulkhead. At this point, the local structure at the corner no longer bears significant concentrated stress, improving fatigue resistance, preventing the disruption of the continuity between the upper and lower bulkheads, and ensuring the integrity of the cargo tank. Furthermore, this solves the problem in the prior art where arc transitions cannot be used on LNG bunkering vessels, while conventional designs lead to stress concentration.

[0009] Furthermore, by setting an extension edge on the side platform plate and a plug-in groove on the sealing plate, the positioning and installation of the sealing plate can be facilitated.

[0010] A method for installing a corner structure for a transverse bulkhead platform of an LNG bunkering vessel involves dividing the longitudinal bulkhead into an upper and lower side bulkhead, keeping the side platform plate between the upper and lower side bulkheads, creating an clearance notch at the junction of the transverse bulkhead with the upper and lower side bulkheads before fixing the transverse bulkhead to the upper and lower side bulkheads, and finally welding a sealing plate to the location of the clearance notch after fixing the transverse bulkhead to the longitudinal bulkhead.

[0011] Furthermore, when placing the side platform plate between the upper and lower side bulkheads, the edge of the side platform plate is kept exposed above the longitudinal bulkhead to form an extended edge, and a plug groove adapted to the extended edge is simultaneously provided on the sealing plate. When installing the sealing plate, the extended edge is kept in contact with the plug groove.

[0012] The beneficial effects of the installation method for the corner structure of the transverse bulkhead platform of the present invention are as follows: Since a right angle will generate a large stress concentration at the corner structure, the present invention avoids stress concentration at the corner by setting an arc notch on the transverse bulkhead platform to use a negative corner. Then, a sealing plate is set to seal the avoidance notch, which can seal the transverse bulkhead. At this time, the local structure at the corner no longer bears a large concentrated stress, which improves fatigue resistance, avoids the problem of the continuity of the upper and lower bulkheads being destroyed, and ensures the integrity of the liquid cargo tank. In addition, it solves the problem that the existing technology cannot use arc transitions on LNG bunkering ships, while conventional designs will lead to stress concentration.

[0013] Furthermore, by setting an extension edge on the side platform plate and a plug-in groove on the sealing plate, the positioning and installation of the sealing plate can be facilitated. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a top view of an embodiment of the corner structure for the transverse bulkhead platform of an LNG bunkering vessel according to the present invention; Figure 2 for Figure 1 A magnified view of a portion at point H; Figure 3 for Figure 1 AA view; Figure 4 This is a schematic diagram of an embodiment of the corner structure for the transverse bulkhead platform of an LNG bunkering vessel according to the present invention.

[0016] Figure 5 The conventional corner design method is adopted.

[0017] The labels in the diagram represent: 1. Side platform plate; 2. Bulkhead platform plate; 3. First transverse bulkhead plate; 4. Second transverse bulkhead plate; 5. First sector insert plate; 6. Second sector insert plate; 7. Upper side bulkhead plate; 8. Lower side bulkhead plate; 9. Extension edge; 10. Liquid cargo tank. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0019] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0020] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms and should not be construed as indicating or implying relative importance. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0021] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0022] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0023] In the following description, suffixes such as "module," "part," or "unit" used to denote elements are used only for the convenience of the description of the invention and have no specific meaning in themselves. Therefore, "module" and "part" can be used interchangeably.

[0024] To better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0025] In Embodiment 1 of the present invention, for the corner structure (hereinafter referred to as corner structure) used in the transverse bulkhead platform of an LNG bunkering vessel: In this embodiment, the corner structure includes a side platform plate 1, a first transverse bulkhead plate 3, a second transverse bulkhead plate 4, a bulkhead platform plate 2, and a longitudinal bulkhead plate; the outer side of the transverse bulkhead plate is the cargo tank 10. The side platform plate 1 and the bulkhead platform plate 2 are of different sizes. At the docking point, the boundary between the side platform plate 1 and the bulkhead platform plate 2 is used to set a negative corner structure. The negative corner structure also includes a transverse bulkhead plate and a longitudinal bulkhead plate, wherein the longitudinal bulkhead plate is divided into two parts by the side platform plate 1, specifically including an upper bulkhead plate 7 located above the side platform plate 1 and a lower bulkhead plate 8 located below the side platform plate 1. There are two transverse bulkhead plates and two fan-shaped insert plates. The fan-shaped insert plates have a first fan-shaped insert plate 5 corresponding to the first transverse bulkhead plate 3 and a second fan-shaped insert plate 6 corresponding to the second transverse bulkhead plate 4; the structures on both sides are the same. In this embodiment, the structure is described using one side of the transverse bulkhead plate and fan-shaped insert plate as an example.

[0026] At the corner structure of the transverse bulkhead, a notch is provided. Specifically, the transverse bulkhead has a clearance notch at the boundary between the upper bulkhead 7 and the lower bulkhead 8 to avoid the corner between the upper bulkhead 7 and the lower bulkhead 8. The clearance notch is fan-shaped, and the clearance notch allows the transverse bulkhead to be smoothly connected and installed with the side bulkhead.

[0027] The presence of the clearance gap compromises the airtightness of the transverse bulkhead. Therefore, in this embodiment, a sealing plate is also provided at the clearance gap to seal it. The first sector-shaped insert plate 5 and the second sector-shaped insert plate 6 constitute the sealing plate. During installation, the end edge of the side platform plate 1 extends out of the longitudinal bulkhead, and the edge of the side platform plate 1 forms an extension edge 9. Since the sealing plate is only required to be installed in a localized area, the extension edge 9 does not need to extend a long distance. The sealing plate is a sector-shaped plate, and the center of the sector-shaped plate is located at the corner of the upper side bulkhead 7 and the lower side bulkhead 8. Of course, in order to achieve end sealing, it cannot rely solely on the insertion method. After fixing through insertion, it is welded together to secure it.

[0028] In an embodiment of the installation method for the corner structure of the transverse bulkhead platform of an LNG bunkering vessel in this invention: In this embodiment, during processing, when placing the side platform plate 1 between the upper side bulkhead 7 and the lower side bulkhead 8, the edge of the side platform plate 1 should protrude from the longitudinal bulkhead to form an extension edge 9. The extension edge 9 is located at the junction of the side bulkheads 7 and 8 and the transverse bulkhead. Since a transverse bulkhead also needs to be installed at the corner structure, a clearance notch is made on the transverse bulkhead before its installation to avoid the junction of the upper side bulkhead 7 and the lower side bulkhead 8. The transverse bulkhead is then fixed to the side bulkhead, aligning the clearance notch with the junction of the upper side bulkhead 7 and the lower side bulkhead 8. After welding, a sealing plate with a shape matching the clearance notch is installed at the clearance notch of the transverse bulkhead. It is worth noting that before installation, a groove for mating with the extension edge 9 needs to be machined on the sealing plate to facilitate the positioning of the sealing plate.

[0029] It should be understood that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A corner structure for a transverse bulkhead platform of an LNG bunkering vessel, comprising a corner structure formed by transverse bulkhead panels, bulkhead platform panels, side platform panels, and longitudinal bulkhead panels, characterized in that: The side platform plate divides the longitudinal bulkhead into an upper side bulkhead and a lower side bulkhead. The transverse bulkhead is fixed to the upper side bulkhead and the lower side bulkhead. The side platform plate has an extension edge that extends outward at the transverse bulkhead to dock with the platform inside the bulkhead. There is a rounded notch at the docking corner. A sealing plate is provided on the transverse bulkhead to seal the rounded notch.

2. The corner structure for the transverse bulkhead platform of an LNG bunkering vessel according to claim 1, characterized in that: The sealing plate is provided with a plug groove that is adapted to the extension edge for insertion.

3. The corner structure for a transverse bulkhead platform of an LNG bunkering vessel according to claim 1 or 2, characterized in that: The sealing plate is a sector-shaped plate, and the center of the sector-shaped plate is located at the corner of the upper side wall and the lower side wall.

4. The corner structure for a transverse bulkhead platform of an LNG bunkering vessel according to claim 1 or 2, characterized in that: The extension length of the extended edge is 100-150mm.

5. A method for installing a corner structure for a transverse bulkhead platform of an LNG bunkering vessel, characterized in that: During installation, the longitudinal bulkhead is divided into upper and lower bulkheads. The side platform plate is kept between the upper and lower bulkheads. Before fixing the transverse bulkhead to the upper and lower bulkheads, a clearance notch is made at the junction of the transverse bulkhead with the upper and lower bulkheads. After the transverse bulkhead is fixed to the longitudinal bulkhead, a sealing plate is welded and fixed at the location of the clearance notch to seal the clearance notch.

6. The installation method of the corner structure for the transverse bulkhead platform of an LNG bunkering vessel according to claim 5, characterized in that: When placing the side platform plate between the upper and lower side panels, keep the edge of the side platform plate exposed above the longitudinal wall to form an extended edge, and simultaneously set the plug groove that matches the extended edge on the sealing plate. When installing the sealing plate, keep the extended edge aligned with the plug groove.

Images