Cargo cabin hatch structure capable of loading 45-chi and 40-chi containers above cabin cover in mixed mode
By setting up a staggered arrangement of containers above the hatch cover, the problem of mixing 45-foot and 40-foot containers was solved, the space utilization of the cargo hold was optimized, and the requirements for the overall length of the ship were reduced.
Patent Information
- Application Number
- CN202520191145.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-07
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-02-07
AI Technical Summary
In the existing technology, 45-foot containers cannot be mixed with 40-foot containers on the first layer above the hatch cover, which leads to an increase in the width of the deck strips, occupies more space in the main hull, and the hatch cover design is complicated.
By setting up a staggered container arrangement above the hatch cover, adding an extension section at one end of the hatch cover, and adjusting the width of the deck strips, a loading area for 45-foot containers is formed, reducing the width specifications of the deck strips and making full use of the space.
This allows for the mixing of 45-foot and 40-foot containers on the first layer above the hatch cover, reducing the increase in deck width, lowering the space requirements for the overall length of the ship, and optimizing the space utilization of the cargo hold.
Smart Images
Figure CN223658366U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of marine technology, and in particular to a cargo hold hatch structure that can accommodate 45-foot and 40-foot containers mixed on the hatch cover. Background Technology
[0002] In marine container shipping, a 45-foot container is longer than a 40-foot container. A 45-foot container is 13716 mm long, while a 40-foot container is 12192 mm long. Two 20-foot containers occupy the space of one 40-foot container. On conventional cargo hold hatches of container ships, the lowest levels above the hatch cover are used only for loading 40-foot or 20-foot containers, while 45-foot containers can only be stacked on levels higher than the lashing bridges.
[0003] like Figure 1 As shown, the cargo hold hatch is equipped with a hatch cover 50, with a lashing bridge 51 in front of the hatch cover and a lashing bridge 52 behind the hatch cover. Below the lashing bridge 51 are deck strips 53, and below the lashing bridge 52 are deck strips 54. The width of both deck strips 53 and 45 is C1, where C1 = 1850 mm; the hatch length of the cargo hold is C2 = 12600 mm. Only 40-foot containers 56 or two 20-foot containers 57 can be loaded between lashing bridges 51 and 52, while 40-foot containers 55 can only be loaded at a position higher than lashing bridges 51 and 52.
[0004] Currently, an increasing number of shipowners require that at least one container bay on board be able to mix 45-foot and 40-foot containers starting from the first level on the deck or hatch cover. Loading 45-foot containers on the first level requires 1524 mm more space than usual. This has a series of impacts on cargo hold layout, hatch cover design, and lashing bridge design.
[0005] To meet the space requirements for loading 45-foot containers starting from the first deck above the hatch, the width of the deck slats needs to be adjusted and the size of the hatch cover increased. In conventional hatch designs, the width of both the fore and aft deck slats needs to be increased to widen the distance between the two lashing bridges to accommodate 45-foot containers. Simultaneously, extensions need to be added to the front and rear of the hatch cover to support the 45-foot containers. The center of the container along its length is aligned with the center of the hatch opening, and the container bases are symmetrically arranged about the center of the hatch. A typical deck slat width is 1850mm. For hatches loading 45-foot containers starting from the first deck, the width of the deck slats forward increases to 2350mm, and the width aft increases to 2050mm. This increased deck slat width results in the cargo hold occupying more space in the main hull.
[0006] In the existing cargo hold hatch scheme that mixes 45-foot and 40-foot containers starting from the first layer above the hatch cover, the width of the fore and aft deck strips is increased, extension sections need to be set at the front and rear ends of the hatch cover, and the center of the 45-foot container along its length is aligned with the center of the cargo hold. The increased width of the deck strips means that the cargo hold occupies more space in the main hull. Utility Model Content
[0007] In order to overcome the above-mentioned defects in the existing technology, this utility model provides a cargo hold hatch structure that can accommodate 45-foot and 40-foot containers mixed on the hatch cover.
[0008] The present invention solves the above-mentioned technical problems through the following technical solution:
[0009] A cargo hold hatch structure capable of loading 45-foot and 40-foot containers together above a hatch cover includes a hatch cover capable of loading 40-foot containers, the hatch cover being located above the hatch opening of the cargo hold; a forward lashing bridge is provided in front of the hatch cover, and a rear lashing bridge is provided behind the hatch cover; a forward deck strip is provided below the forward lashing bridge, and a rear deck strip is provided below the rear lashing bridge; a hatch cover extension is provided only at the front or rear end of the hatch cover, and a deck strip extension is provided only at the forward or rear deck strip; a loading area capable of accommodating 45-foot containers is formed between the forward and rear lashing bridges.
[0010] Furthermore, the containers above the hatch and inside the cargo hold are staggered.
[0011] Furthermore, the base of the container above the hatch and the base of the container inside the cargo hold are staggered.
[0012] Furthermore, the hatch is the one closest to the superstructure.
[0013] Furthermore, the hatch is located in front of the superstructure.
[0014] Furthermore, the hatch is located at the rear of the superstructure.
[0015] Furthermore, the hatch cover is the one closest to the chimney.
[0016] Furthermore, the hatch is located in front of the chimney.
[0017] Furthermore, the hatch is located behind the chimney.
[0018] Furthermore, the forward lashing bridge is fixed to the forward deck bar, and the aft lashing bridge is fixed to the aft deck bar.
[0019] The beneficial effects of this utility model are as follows: The cargo hold hatch structure of this utility model allows for the mixed loading of 45-foot and 40-foot containers starting from the first layer above the hatch cover; it only increases the width of the deck strips in front of or behind the cargo hold hatch, and only sets an extension section at one end of the hatch cover. The container and its base are arranged in an offset manner, reducing the width specifications of the deck strips and reducing the main hull space occupied by the cargo hold; it makes full use of space and reduces the requirements for the overall length of the ship for arranging 45-foot containers. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the existing technology.
[0021] Figure 2 This is a schematic diagram of a preferred embodiment of the present invention. Detailed Implementation
[0022] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.
[0023] like Figure 2 As shown, a cargo hold hatch structure capable of loading 45-foot and 40-foot containers together above a hatch cover includes a hatch cover 10 capable of loading a 40-foot container 41, the hatch cover 10 being located above the hatch opening of the cargo hold 12; a front lashing bridge 21 is provided in front of the hatch cover 10, and a rear lashing bridge 22 is provided behind the hatch cover 10.
[0024] A forward deck bar 31 is provided below the forward lashing bridge 21, and a rear deck bar 32 is provided below the rear lashing bridge 22. The forward lashing bridge 21 is fixed to the forward deck bar 31, and the rear lashing bridge 22 is fixed to the rear deck bar 32.
[0025] In this embodiment, a hatch extension section 11 is provided only at the rear end of the hatch cover 10; and a deck extension section 33 is provided only at the rear deck strip 32.
[0026] The width of both the forward and aft deck slats is D1; D1 = 1850 mm. The width of the aft deck slat, including the deck slat extension, is D2, D2 = 2050 mm.
[0027] In other embodiments, a hatch extension is provided only at the front end of the hatch cover; a deck extension is provided only at the front deck slat.
[0028] A loading area capable of accommodating a 45-foot container 42 is formed between the front lashing bridge 21 and the rear lashing bridge 22.
[0029] The containers above hatch 10 and the containers in cargo hold 12 are staggered. That is, the centerline of the container above hatch 10 and the centerline of the container in cargo hold do not coincide, and the misalignment value between the centerlines of the container above hatch 10 and the container in cargo hold is D3, where D3 = 333 mm.
[0030] Correspondingly, the base of the container above the hatch cover 10 and the base of the container inside the cargo hold 12 (not shown in the figure) are staggered.
[0031] In this embodiment, the hatch 10 is the hatch closest to the superstructure 20. The hatch 10 is located in front of the superstructure 20.
[0032] In other embodiments, the hatch may also be located at the rear of the superstructure.
[0033] In other embodiments, the hatch may also be the hatch closest to the chimney; the hatch may be located in front of the chimney, or the hatch may be located behind the chimney.
[0034] This embodiment is based on existing technologies such as... Figure 1 Based on the structure shown, only the width of the aft deck strip is increased, only the position of the aft lashing bridge is moved, and only an extension section is added at the rear end of the hatch. The containers on the hatch are then moved back to avoid being separated from the containers in the cargo hold, making full use of the aft space. 45-foot containers can be loaded starting from the first layer above the hatch. This embodiment differs from existing technologies as follows: Figure 1 Compared to the structure shown, the hatch length D4 of the cargo hold can remain unchanged, i.e., D4 = 12600 mm.
[0035] The cargo hold hatch structure of this utility model allows for the mixed loading of 45-foot and 40-foot containers starting from the first layer above the hatch cover; it only increases the width of the deck strips in front of or behind the cargo hold hatch, and only sets an extension section at one end of the hatch cover. The container and its base are arranged in an offset manner, reducing the width specifications of the deck strips and reducing the space occupied by the cargo hold in the main hull; it makes full use of space and reduces the requirements for the overall length of the ship for arranging 45-foot containers.
[0036] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.
Claims
1. A cargo hold hatch structure capable of loading 45-foot and 40-foot containers together above a hatch cover, comprising a hatch cover capable of loading 40-foot containers, the hatch cover being disposed above the hatch opening of the cargo hold; a forward lashing bridge is provided in front of the hatch cover, and a rear lashing bridge is provided behind the hatch cover; a forward deck strip is provided below the forward lashing bridge, and a rear deck strip is provided below the rear lashing bridge; characterized in that, Hatch cover extensions are provided only at the front or rear of the hatch cover, and deck strip extensions are provided only at the forward or aft deck strip; a loading area capable of accommodating 45-foot containers is formed between the forward and aft lashing bridges.
2. The cargo hold hatch structure as described in claim 1, capable of loading 45-foot and 40-foot containers together above the hatch cover, characterized in that, The containers above the hatch and the containers inside the cargo hold are staggered.
3. The cargo hold hatch structure as described in claim 2, capable of loading 45-foot and 40-foot containers together above the hatch cover, characterized in that... The base of the container above the hatch and the base of the container inside the cargo hold are staggered.
4. The cargo hold hatch structure as described in claim 1, capable of loading 45-foot and 40-foot containers together above the hatch cover, characterized in that, The hatch cover is the one closest to the superstructure.
5. The cargo hold hatch structure as described in claim 4, capable of loading 45-foot and 40-foot containers together above the hatch cover, characterized in that... The hatch is located at the front of the superstructure.
6. The cargo hold hatch structure as described in claim 4, capable of loading 45-foot and 40-foot containers together above the hatch cover, characterized in that, The hatch is located at the rear of the superstructure.
7. The cargo hold hatch structure as described in claim 1, capable of loading 45-foot and 40-foot containers together above the hatch cover, characterized in that, The hatch cover is the one closest to the chimney.
8. The cargo hold hatch structure as described in claim 7, capable of loading 45-foot and 40-foot containers together above the hatch cover, characterized in that, The hatch is located in front of the chimney.
9. The cargo hold hatch structure as described in claim 7, capable of loading 45-foot and 40-foot containers together above the hatch cover, characterized in that, The hatch is located behind the chimney.
10. The cargo hold hatch structure as described in claim 1, capable of loading 45-foot and 40-foot containers together above the hatch cover, characterized in that, The forward lashing bridge is fixed to the forward deck strip, and the aft lashing bridge is fixed to the aft deck strip.