Bulk carrier with side cranes

Abstract

The utility model provides a bulk cargo ship with side-mounted cargo winch, and belongs to the shipbuilding technical field. The utility model discloses including ship body structure, the ship body structure is equipped with a plurality of cargo holds along the length direction, the top of cargo hold is equipped with hatch coaming, is provided with the folding hatch cover on the hatch coaming, the main deck of ship body structure is installed with a plurality of Z type's crane base, is installed with the cargo winch on the crane base, the crane base can expand the hoisting range of cargo winch. The utility model can install the crane on the side deck of bulk cargo ship, and satisfies the hoisting demand of all cargo holds.

Description

Technical Field

[0001] This utility model belongs to the field of shipbuilding technology and relates to a bulk carrier equipped with a side crane. Background Technology

[0002] As the core tool of global dry bulk shipping, the loading and unloading efficiency of bulk carriers directly affects shipping economics and port turnaround speed. Currently, a large number of small and medium-sized or specially designed bulk carriers worldwide are still not equipped with onboard cranes (ship-owned cranes). When these vessels are berthing, they rely entirely on external equipment such as quay cranes or floating cranes to complete cargo loading and unloading.

[0003] Under current technological conditions, this operating mode has significant limitations: First, dockside crane resources are usually limited, especially in ports with underdeveloped infrastructure or saturated throughput, requiring ships to queue for extended periods, significantly prolonging voyages and increasing operating costs such as demurrage and berth fees. Second, using dockside cranes incurs high leasing and service fees and is subject to dockside scheduling plans, resulting in extremely poor flexibility. Third, the operating range and lifting capacity of dockside cranes may not be perfectly matched to the ship's cargo hold layout, potentially leading to low loading and unloading efficiency or even cargo damage. Furthermore, in remote areas without dockside facilities or in emergency situations, ships will completely lose their loading and unloading capabilities, severely impacting operational reliability.

[0004] To alleviate these problems, some shipowners have attempted to install fixed cranes by modifying the ship's structure. However, such solutions require large-scale cutting and reinforcement of the deck, hatch coamings, and even the hull structure, resulting in a large workload and high costs. In addition, traditional crane installation solutions are often limited by the base layout and boom length, making it difficult to achieve full coverage of all cargo holds. They still rely on ship relocation or auxiliary equipment, failing to fundamentally solve the efficiency bottleneck. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a bulk carrier equipped with a side crane. This invention enables the installation of a crane on the side deck of a bulk carrier and meets the lifting requirements of all cargo holds.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A bulk carrier equipped with a side crane includes a hull structure with several cargo holds along its length. The top of each cargo hold is provided with a hatch coaming and a folding hatch cover. Several Z-shaped crane bases are installed on the main deck of the hull structure, and cranes are installed on the crane bases. The crane bases can expand the lifting range of the cranes.

[0008] Preferably, the crane base includes:

[0009] A connecting seat, which is welded to the side of the main deck of the hull structure;

[0010] A cylindrical container, which is vertically welded to the connecting seat;

[0011] The first rotating seat is rotatably mounted on the cylinder;

[0012] A crane base is horizontally mounted on the side of the first rotating seat via a connecting frame, and the crane is rotatably mounted on the crane base.

[0013] Preferably, a first gear ring is provided on the inner side of the lower end of the first rotating seat, and a first drive motor is fixedly provided on the inner side of the upper end of the cylinder. The output shaft of the first drive motor is provided with a first drive gear that meshes with the first gear ring.

[0014] Preferably, a second gear ring is provided on the inner side of the lower end of the crane, and a second drive motor is fixedly provided on the inner side of the upper end of the crane base. The output shaft of the second drive motor is fixedly provided with a second drive gear that meshes with the second gear ring.

[0015] Preferably, the connecting seat has a manhole on the side near the ship for entering the interior, and the crane base has a passage leading from the manhole to the crane interior.

[0016] Preferably, the top of the first rotating seat is provided with a U-shaped boom bracket.

[0017] Preferably, when the folding hatch cover is opened and folded, the height of the crane base is greater than the height of the folding hatch cover when it is opened and folded.

[0018] Preferably, there are 7 cargo holds arranged sequentially from stern to bow, and 2 cranes are provided. One crane is installed between the second and third cargo holds from stern to bow, and the other crane is installed between the fourth and fifth cargo holds from stern to bow.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. The crane base added by this utility model is installed on the side of the main deck. It does not require modification of the pipeline and fan room between the two hatch coamings. It only requires adding corresponding structural reinforcement below the side of the main deck and adding corresponding counterweight on the other side to meet the requirements. The modification is minimal.

[0021] 2. In the conventional design of bulk carriers, in order to meet the lifting requirements of cargo holds, cranes are usually installed between two adjacent cargo holds. Now, this application has 7 cargo holds that only 2 cranes are needed to cover all cargo hold areas, which greatly reduces the cost of conversion.

[0022] 3. The crane base in this utility model is Z-shaped, which enables the crane to achieve double rotation. With a limited boom length, it can cover a larger lifting area, allowing the crane to lift any position in the cargo hold and improve lifting efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a top view of the main deck of the cargo hold of this utility model;

[0025] Figure 3 This is a structural diagram of the crane base;

[0026] Figure 4 This is a schematic diagram of the coverage area of ​​the crane hook.

[0027] In the diagram: 1. Hull structure; 11. Cargo hold; 12. Hatch coaming; 2. Folding hatch cover; 3. Crane base; 31. Connecting seat; 311. Manhole; 32. Cylinder; 321. First straight ladder; 322. First drive motor; 323. First drive gear; 33. First rotating seat; 331. First gear ring; 332. Second straight ladder; 333. Small hatch cover; 334. Crane boom bracket; 34. Connecting frame; 35. Crane base; 351. Third straight ladder; 352. Second drive motor; 353. Second drive gear; 4. Crane; 41. Second gear ring. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] like Figure 1-4 As shown, a bulk carrier equipped with a side crane includes a hull structure 1. The hull structure 1 has several cargo holds 11 along its length. The top of each cargo hold 11 is provided with a hatch coaming 12. The hatch coaming 12 is provided with a folding hatch cover 2. Two of the folding hatch covers 2 are opened in opposite directions by hydraulic cylinders. After opening, they are almost upright. The folding hatch cover 2 is existing technology and saves the horizontal space occupied after the hatch cover is opened.

[0030] This bulk carrier has seven cargo holds 11 from bow to stern, and each cargo hold has a folding hydraulic hatch cover. Two Z-shaped crane bases 3 are installed on the main deck of the hull structure 1. One crane base 3 is installed between the second and third cargo holds 11 from stern to bow, and the other crane base 3 is installed between the fourth and fifth cargo holds 11 from stern to bow. Cranes 4 are installed on the crane bases 3, which expand the lifting range of the cranes 4.

[0031] Using only two cranes can cover the lifting range of all seven cargo holds 11, greatly reducing the conversion cost. At the same time, the crane base 3 is installed on the side of the main deck, eliminating the need to modify the pipes and fan room between the hatch coamings 12, reducing the number of modifications and improving conversion efficiency.

[0032] In this embodiment, the crane base includes a connecting seat 31, a cylinder 32, a first rotating seat 33, and a crane base 35.

[0033] The connecting seat 31 is welded to the side of the main deck of the hull structure 1. Preferably, the connecting seat 31 is in the shape of a round top and a square bottom.

[0034] The cylinder 32 is vertically welded to the connecting seat 31.

[0035] The first rotating seat 33 is rotatably mounted on the cylinder 32. A first gear ring 331 is provided on the inner side of the lower end of the first rotating seat 33. A first drive motor 322 is fixedly mounted on the inner side of the upper end of the cylinder 32. The output shaft of the first drive motor 322 is provided with a first drive gear 323 that meshes with the first gear ring 331.

[0036] The crane base 35 is horizontally arranged on the side of the first rotating seat 33 via a connecting frame 34. The crane 4 is rotatably arranged on the crane base 35. A second gear ring 41 is provided on the inner side of the lower end of the crane 4. A second drive motor 352 is fixedly arranged on the inner side of the upper end of the crane base 35. A second drive gear 353 that meshes with the second gear ring 41 is fixedly arranged on the output shaft of the second drive motor 352.

[0037] The Z-shaped crane base 3 enables the crane 4 to achieve double rotation, covering a larger lifting area with a limited boom length. This allows the crane 4 to lift cargo from any position on the cargo hold 11, improving lifting efficiency.

[0038] Preferably, the height of the connecting frame 34 and the jacking base 35 is higher than the height of the folding hatch 2 after it is opened, so as to avoid interference when the jacking base 35 rotates horizontally around the cylinder 32.

[0039] Two manholes 311 are symmetrically provided on two sides of the connecting seat 31, and the manholes 311 can lead to the interior of the connecting seat 31. A first straight ladder 321 is vertically installed on the inner wall of the cylinder. A second straight ladder 332 is vertically installed inside the first rotating seat 33. A through hole is provided in the connecting frame 34 to connect the first rotating seat 33 and the crane base 35. A third straight ladder 351 is vertically installed on the inner wall of the crane base 35 and connects to the interior of the crane 4. This forms a passage from the crane base 3 to the crane 4, which facilitates personnel to enter the crane 4 operating cabin for operation.

[0040] Preferably, the top of the first rotating seat (33) is provided with a U-shaped boom bracket (334), which is used to horizontally place the boom of the crane 4. The top of the first rotating seat 33 is provided with a through hole, and a small hatch cover 334 is installed on the through hole. The upper end of the second straight ladder 332 inside the first rotating seat 33 is directly below the small hatch cover 333. A protective railing is installed on the top of the first rotating seat 33 to prevent the operator from accidentally falling.

Claims

1. A bulk carrier equipped with a side crane, comprising a hull structure (1), wherein the hull structure (1) has a plurality of cargo holds (11) along its length, wherein the top of each cargo hold (11) is provided with a hatch coaming (12), and the hatch coaming (12) is provided with a folding hatch cover (2), characterized in that, Several Z-shaped crane bases (3) are installed on the main deck of the hull structure (1), and a crane (4) is installed on the crane base (3). The crane base (3) can expand the lifting range of the crane (4).

2. A bulk carrier equipped with a side crane according to claim 1, characterized in that, The crane base (3) includes: Connecting seat (31), which is welded to the side of the main deck of the hull structure (1); A cylindrical tube (32) is vertically welded to a connecting seat (31); The first rotating seat (33) is rotatably mounted on the cylinder (32); The crane base (35) is horizontally arranged on the side of the first rotating seat (33) via a connecting frame (34), and the crane (4) is rotatably arranged on the crane base (35).

3. A bulk carrier equipped with a side crane according to claim 2, characterized in that, The inner side of the lower end of the first rotating seat (33) is provided with a first gear ring (331), and the inner side of the upper end of the cylinder (32) is fixedly provided with a first drive motor (322). The output shaft of the first drive motor (322) is provided with a first drive gear (323) that meshes with the first gear ring (331).

4. A bulk carrier equipped with a side crane according to claim 2, characterized in that, The lower inner side of the crane (4) is provided with a second gear ring (41), and the upper inner side of the crane base (35) is fixedly provided with a second drive motor (352). The output shaft of the second drive motor (352) is fixedly provided with a second drive gear (353) that meshes with the second gear ring (41).

5. A bulk carrier equipped with a side crane according to claim 2, characterized in that, The connecting seat (31) has a manhole (311) on the side near the ship, which leads to the interior. The crane base (3) has a passage leading from the manhole (311) to the crane (4).

6. A bulk carrier equipped with a side crane according to claim 2, characterized in that, The top of the first rotating seat (33) is provided with a U-shaped boom bracket (334).

7. A bulk carrier equipped with a side crane according to claim 2, characterized in that, When the folding hatch (2) is opened and folded, the height of the cradle base (35) is greater than the height of the folding hatch (2) when it is opened and folded.

8. A bulk carrier equipped with a side crane according to claim 1, characterized in that, The cargo holds (11) are arranged in seven rows from the stern to the bow. There are two cranes (4), one of which is installed between the second and third cargo holds from the stern to the bow, and the other is installed between the fourth and fifth cargo holds from the stern to the bow.

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