Cabin hatch negative corner structure

Abstract

The cabin hatch negative corner structure comprises a concave crescent negative corner plate, an opening of the negative corner plate faces a hatch, one side of the negative corner plate is fixed to the longitudinal wall of a ship body, and the longitudinal wall of the ship body is perpendicular to a main deck and the front wall of the hatch end; a mounting opening is formed in the front wall of the hatch end, a negative corner supporting structure is integrated on the mounting opening, a cavity used for containing a negative corner plate is formed in the negative corner supporting structure, the front wall of the cavity is open, and the negative corner plate is fixedly connected with the negative corner supporting structure. An independent concave crescent-shaped negative corner plate is adopted as a negative corner structure, and then the strength of the corner structure is guaranteed by adding a negative corner supporting structure. The negative corner structure is easy to machine, low in cost, light in weight, high in strength and capable of meeting the situation that the deck on the non-opening side of the hatch end wall in the head area is discontinuous in the ship width direction and is discontinued from the longitudinal wall.

Description

Technical Field

[0001] The present invention relates to the technical field of ship structures, and more specifically to a cabin hatch negative corner structure. Background Art

[0002] On large ships such as container ships and bulk carriers, there are usually large openings such as cargo hatches or engine room hatches on the deck. The opening of the large opening seriously damages the continuity of the hull structure, and the corner of the large opening is usually a stress concentration point. The structure at the opening corner has an important impact on the fatigue life of the hull structure. Therefore, a corner structure form is adopted at the opening for transition. The negative corner is designed with a specific concave or reverse arc to reduce stress concentration while leaving more space for the cargo hold.

[0003] For inland river ships, the structural negative corner form of the "Code for the Construction of Steel Inland River Ships" is usually adopted, and the support wall plate of the negative corner adopts a conical structure. In addition, the existing publication number CN113978608A, titled "A Ship Negative Corner Structure and a Ship", discloses that a negative corner structure is provided on the deck, and the negative corner structure is strengthened by adopting an upper and lower inclined sealing plate structure form. Among them, the technical solutions of the negative corner structure form provided by the code and the upper and lower inclined sealing plate structure form of the negative corner structure can only handle the situation where the deck structure on the non-opening side of the hatch end wall is continuous in the ship width direction, and cannot be applied to the situation where the deck structure on the non-opening side of the hatch end wall is discontinuous in the ship width direction (generally, the negative corner structure is at the hatch end wall position. At the main deck height, an inner concave area is processed at the position of the main deck close to the hatch. However, at the hatch end wall position of a 120-container battery methanol container ship, there is no main deck at the same height, so the negative corner cannot be formed by processing the main deck). The solution provided by the code requires making conical plates, with difficult structure processing and relatively low strength. The technical solution of the upper and lower inclined sealing plate structure form of the negative corner structure is applicable to large ocean container ships, and when applied to inland river container ships, it has a large weight and high cost.

[0004] Therefore, how to provide a cabin hatch negative corner structure with simple structure processing, low cost, light weight, high strength and capable of meeting the situation where the deck on the non-opening side of the hatch end wall in the bow area is discontinuous in the ship width direction and interrupted at the longitudinal wall is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a hatch coaming negative corner structure with simple structure processing, low cost, light weight, high strength, and can meet the situation that the deck on the non-opening side of the hatch coaming end wall in the bow area is discontinuous in the ship width direction and interrupted at the longitudinal bulkhead. It can be applied to container ships and cargo ships to transfer the stress at the hatch corner, avoid stress concentration, and improve the fatigue life of the hull structure.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A hatch coaming negative corner structure, comprising: a concave and crescent-shaped negative corner plate, the opening of the negative corner plate faces the hatch, one side of the negative corner plate is fixed on the hull longitudinal bulkhead, and the hull longitudinal bulkhead is perpendicular to both the main deck and the front wall of the hatch coaming; an installation opening is provided on the front wall of the hatch coaming, and a negative corner support structure is integrated on the installation opening. The negative corner support structure has a cavity for accommodating the negative corner plate inside, the front wall of the cavity is arranged in an open manner, and the negative corner plate is fixedly connected with the negative corner support structure.

[0008] Through the above technical solutions, it can be seen that compared with the prior art, the present invention discloses a hatch coaming negative corner structure, which uses a single concave and crescent-shaped negative corner plate as the negative corner structure, and then by adding a negative corner support structure, the strength of the corner structure is ensured. This negative corner structure is simple in processing, low in cost, light in weight, high in strength, and can meet the situation that the deck on the non-opening side of the hatch coaming end wall in the bow area is discontinuous in the ship width direction and interrupted at the longitudinal bulkhead.

[0009] Furthermore, a longitudinal bulkhead reinforcing rib for eliminating the stress between them is welded between the end of the negative corner plate away from its opening and the hull longitudinal bulkhead.

[0010] The beneficial effect of adopting the above technical solution is: installing the longitudinal bulkhead reinforcing rib, which serves as a transition between the negative corner plate and the hull longitudinal bulkhead, can avoid stress concentration problems.

[0011] Furthermore, a notch is provided on the installation opening, and a stress transfer plate extends out from the side of the negative corner plate close to the hull longitudinal bulkhead through the notch, and one side of the stress transfer plate is welded and fixed to the hull longitudinal bulkhead.

[0012] The beneficial effect of adopting the above technical solution is: the stress transfer plate is used to transfer the stress at the hatch corner to the negative corner plate first, avoiding the stress acting on the hatch coaming end wall.

[0013] Furthermore, the negative corner support structure includes:

[0014] Upper inclined sealing plate, one side of the upper inclined sealing plate is fixedly welded to the longitudinal hull wall, the high end of the upper inclined sealing plate is fixedly welded to the upper edge of the installation opening, and the low end of the upper inclined sealing plate is fixedly welded to the end of the negative corner plate away from its opening;

[0015] Lower inclined sealing plate, one side of the lower inclined sealing plate is fixedly welded to the longitudinal hull wall, the low end of the lower inclined sealing plate is fixedly welded to the lower edge of the installation opening, and the high end of the lower inclined sealing plate is fixedly welded to the end of the negative corner plate away from its opening;

[0016] Side sealing plate, the side sealing plate is welded to the other side of the upper inclined sealing plate and the lower inclined sealing plate, the rear end of the side sealing plate is fixedly welded to the other side of the negative corner plate, and the front end of the side sealing plate is fixedly welded to the front wall of the hatch end.

[0017] The beneficial effects of adopting the above technical solutions are: the upper inclined sealing plate, the lower inclined sealing plate and the side sealing plate can effectively support and fix the negative corner plate, ensuring the strength of the corner structure.

[0018] Furthermore, stiffeners and brackets for reinforcement are welded on the upper inclined sealing plate, the lower inclined sealing plate and the side sealing plate.

[0019] The beneficial effects of adopting the above technical solutions are: the stiffeners and brackets reinforce the corresponding structures, improving the structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0021] Figure 1 It is a schematic front view structure diagram of a negative corner structure of a ship hatch provided by the present invention.

[0022] Figure 2 It is a schematic rear view structure diagram of a negative corner structure of a ship hatch provided by the present invention.

[0023] Figure 3 It is Figure 1 the front view structure diagram of

[0024] Figure 4 It is Figure 3 the schematic diagram of the middle section A1-A1 in

[0025] Figure 5 It is Figure 3 the schematic diagram of the middle section A2-A2 in

[0026] Figure 6 For Figure 3 The schematic diagram of the middle cross-section A3 - A3.

[0027] Figure 7 For Figure 3 The schematic diagram of the middle cross-section A4 - A4. Specific implementation manner

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0029] In the existing design solutions, negative corners are often used on continuous deck structures or are extended to a certain extent behind the raised deck. The present invention mainly aims at the structural characteristics that the deck on the non-opening side of the hatch end wall is discontinuous in the ship width direction and the deck inside the longitudinal bulkhead is raised. For example, a negative corner structure that meets the specification requirements is designed for a 120 - container battery methanol ship, and a support structure with sufficient strength is designed for the negative corner structure.

[0030] In a specific embodiment, the present invention discloses a negative corner structure of a ship's hatch, including: a concave and crescent - shaped negative corner plate 5, the opening of the negative corner plate 5 faces the hatch, one side of the negative corner plate 5 is fixed on the ship's longitudinal bulkhead 2, and the ship's longitudinal bulkhead 2 is perpendicular to both the main deck 9 and the front wall 1 of the hatch end; an installation opening 11 is provided on the front wall 1 of the hatch end, and a negative corner support structure is integrated on the installation opening 11. The negative corner support structure has a cavity for accommodating the negative corner plate 5 inside, and the front wall of the cavity is arranged in an open - mouth manner. See Figure 1 , this open - mouth is an elliptical hole, and its function is to avoid stress concentration on the front wall 1 of the hatch end. The negative corner plate 5 is fixedly connected to the negative corner support structure.

[0031] Among them, a longitudinal bulkhead reinforcing rib 10 for eliminating the stress between them is welded between the end of the negative corner plate 5 far from its opening and the ship's longitudinal bulkhead 2.

[0032] A notch 12 is provided on the installation opening 11, and one side of the negative corner plate 5 close to the ship's longitudinal bulkhead 2 extends out a stress - transfer plate 13 through the notch 12, and one side of the stress - transfer plate 13 is welded and fixed to the ship's longitudinal bulkhead 2.

[0033] In some embodiments, the negative corner support structure includes:

[0034] The upper inclined sealing plate 3, one side of the upper inclined sealing plate 3 is fixedly welded to the longitudinal hull wall 2, the upper end of the upper inclined sealing plate 3 is fixedly welded to the upper edge of the installation opening 11, and the lower end of the upper inclined sealing plate 3 is fixedly welded to the end of the negative corner plate 5 away from its opening;

[0035] The lower inclined sealing plate 4, one side of the lower inclined sealing plate 4 is fixedly welded to the longitudinal hull wall 2, the lower end of the lower inclined sealing plate 4 is fixedly welded to the lower edge of the installation opening 11, and the upper end of the lower inclined sealing plate 4 is fixedly welded to the end of the negative corner plate 5 away from its opening;

[0036] The side sealing plate 6, the side sealing plate 6 is welded to the other side of the upper inclined sealing plate 3 and the lower inclined sealing plate 4. The rear end of the side sealing plate 6 is fixedly welded to the other side of the negative corner plate 5, and the front end of the side sealing plate 6 is fixedly welded to the front wall 1 of the hatch end. The size of the side sealing plate 6 is the triangular area formed by the upper inclined sealing plate 3, the lower inclined sealing plate 4, and the front wall 1 of the hatch end plus a margin of 50 mm, and the right angle is rounded with R50 as a transition.

[0037] The upper inclined sealing plate 3, the lower inclined sealing plate 4, and the side sealing plate 6 are welded with stiffeners 8 and brackets 7 for reinforcement.

[0038] The purpose of the present invention:

[0039] 1. When designing the structure of a 120-box battery methanol container ship, due to the limited hatch space, it is impossible to arrange a conventional hatch corner. It is necessary to adopt a negative corner structure form. The main deck structure on the non-opening side of the hatch end wall in the bow area is disconnected outside the longitudinal wall, and the deck inside the longitudinal wall is raised to form a platform deck. The deck is discontinuous in the ship width direction and cannot use the conventional negative corner structure form. Therefore, it is necessary to design a separate negative corner structure form and the corresponding support structure to meet the requirements for the corner in the specification.

[0040] 2. Design the support structure form of the negative corner and the connection form between the support structure and the main hull structure, and adopt the structure form of upper and lower inclined sealing plates to ensure that the entire structure is reasonably and firmly connected.

[0041] The effects of the present invention:

[0042] 1. Provide a solution on how to design the negative corner structure in the case where the deck on the non-opening side of the hatch end wall in the bow area is discontinuous in the ship width direction and is discontinuous at the longitudinal wall.

[0043] 2. Compared with the traditional scheme, the plate processing is convenient, and there is no need to process conical plates (in the existing technical scheme, the connection between the concave structure formed by the negative corner and the hatch end wall needs to be connected by conical plates, and the processing of conical plates is difficult and inconvenient).

[0044] 3. Compared with the traditional scheme, the structure of the present invention has higher strength.

[0045] 4. Compared with the difficulty of welding conical plates to decks and hatch end walls in traditional solutions, the present invention is easier to be welded to other hull structures.

[0046] 5. The present invention has less material cost and lighter weight.

[0047] 6. The negative corner structure is processed using the plate and profile specifications of this ship and other hull structures, so there is no need to purchase materials separately.

[0048] 7. The overall structure occupies less space and does not affect the cabin layout.

[0049] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For related parts, reference can be made to the description in the method part.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A negative corner structure of a ship hatch, characterized in that: include: A negative corner plate (5) is concave and crescent-shaped, the opening of the negative corner plate (5) is arranged toward the hatch, one side of the negative corner plate (5) is fixed to the longitudinal wall (2) of the hull, and the longitudinal wall (2) of the hull is arranged vertically to the main deck (9) and the front wall (1) of the hatch end; a mounting opening (11) is provided on the front wall (1) of the hatch end, and a negative corner support structure is integrated on the mounting opening (11); the negative corner support structure has a cavity inside for accommodating the negative corner plate (5), the front wall of the cavity is arranged open, and the negative corner plate (5) is fixedly connected to the negative corner support structure.

2. A negative corner structure for a ship hatch according to claim 1, characterized in that: A longitudinal wall reinforcing rib (10) is welded between the end of the negative corner plate (5) away from the opening and the longitudinal wall (2) of the hull for eliminating stress therebetween.

3. A negative corner structure of a ship hatch according to claim 1, characterized in that: The installation opening (11) is provided with a notch (12), and a stress transfer plate (13) extends from the negative corner plate (5) on the side close to the hull longitudinal wall (2) through the notch (12), and one side of the stress transfer plate (13) is welded and fixed to the hull longitudinal wall (2).

4. A negative corner structure for a ship hatch according to any one of claims 1 to 3, characterized in that: The negative corner support structure comprises: An upper inclined sealing plate (3), one side of the upper inclined sealing plate (3) is welded and fixed to the longitudinal wall (2) of the hull, the upper end of the upper inclined sealing plate (3) is welded and fixed to the upper edge of the mounting opening (11), and the lower end of the upper inclined sealing plate (3) is welded and fixed to the end of the negative corner plate (5) away from the opening thereof; A lower oblique sealing plate (4), one side of the lower oblique sealing plate (4) is welded and fixed to the longitudinal wall (2) of the hull, the lower end of the lower oblique sealing plate (4) is welded and fixed to the lower edge of the mounting opening (11), and the upper end of the lower oblique sealing plate (4) is welded and fixed to the end of the negative corner plate (5) away from the opening thereof; A side sealing plate (6), wherein the side sealing plate (6) is welded to the other side of the upper inclined sealing plate (3) and the lower inclined sealing plate (4), the rear end of the side sealing plate (6) is welded and fixed to the other side of the negative corner plate (5), and the front end of the side sealing plate (6) is welded and fixed to the front wall (1) of the hatch end.

5. A negative corner structure for a ship hatch according to claim 4, characterized in that: The upper oblique sealing plate (3), the lower oblique sealing plate (4) and the side sealing plate (6) are welded with frame materials (8) and toggle plates (7) for reinforcement.

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