Removable deck stairway structure of roll-on-roll-off ship

Abstract

The utility model discloses a roll-on-roll-off ship movable deck stairway structure which comprises a stairway room and a hall, the hall is located on the side, close to a cargo hold, of the stairway room, the hall is located between an upper fixed deck and a lower fixed deck, the side, adjacent to the cargo hold, of the hall is separated through a separation bulkhead, and a plurality of structural door holes with different heights are formed in the separation bulkhead. The heights of the lower ends of the multiple structural door holes correspond to the heights of multiple working positions of the movable deck in the cargo hold. According to the movable deck stairway structure of the roll-on-roll-off ship, even if the movable deck stops at different heights, people can freely and rapidly enter and exit the stairway without tools, and fireproof separation of the stairway is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of shipbuilding, in particular to a movable deck stairway structure for a ro-ro ship. Background Art

[0002] Ro-ro ships are special ships dedicated to transporting various types of vehicles. Due to the different types of vehicles transported in each voyage, movable decks with variable working heights are usually arranged in the cargo hold, so that the cargo hold between the two fixed decks can be flexibly divided into upper and lower space combinations with various different storey heights, facilitating the layered loading of vehicles with different heights and improving the utilization rate of the cargo hold space.

[0003] According to the requirements of the International Convention for the Safety of Life at Sea, escape stairways need to be arranged at the head and tail ends of the cargo hold for the normal inspection passage and emergency escape of the crew. A reasonable fire separation needs to be maintained between the stairway and the cargo hold, as shown in Figure 3 .

[0004] The movable deck may be designed with two or more working positions at different heights, resulting in an imperfect match between the deck height and the boarding platform height inside the nearby stairway, as shown in Figure 4 and Figure 5 .

[0005] Figure 4 It is shown that if the boarding deck height inside the stairway is flush with the lower movable deck position, when the movable deck is at the higher position, the deck plane will be at half the height of the stairway fire door, resulting in the crew being unable to open the door and enter normally while standing on the deck.

[0006] Figure 5 It is shown that if the boarding deck height inside the stairway is flush with the higher movable deck position, when the movable deck is at the lower position, the deck plane will be at a certain height below the stairway door opening, and the crew needs to use an additional removable straight ladder to enter and exit the stairway each time, affecting the escape efficiency. Content of the Utility Model

[0007] To solve the above technical problems, the utility model provides a movable deck stairway structure for a ro-ro ship, enabling personnel to freely and quickly enter and exit the stairway without the aid of tools even when the movable deck is docked at different heights and without affecting the fire separation of the stairway.

[0008] To achieve the above objectives, the utility model adopts the following technical solutions:

[0009] A ro-ro ship movable deck stairway structure, including a stairway compartment and a foyer. The foyer is located on the side of the stairway compartment close to the cargo hold. The foyer is located between two adjacent fixed decks. The adjacent side of the foyer and the cargo hold is separated by a partition bulkhead. A plurality of structural door openings with different heights are provided on the partition bulkhead, and the heights of the lower ends of the plurality of structural door openings are respectively set corresponding to the heights at a plurality of working positions of the movable deck in the cargo hold.

[0010] Furthermore, a connecting structure is provided between two adjacent structural door openings.

[0011] Furthermore, the connecting structure is located within the foyer.

[0012] Furthermore, the connecting structure includes one or two embarkation platforms and short ladders. The embarkation platform is located inside the lower end of the structural door opening. The upper end of the short ladder is connected to the upper embarkation platform, and the lower end of the short ladder is connected to the lower embarkation platform or the lower embarkation deck located within the foyer.

[0013] Furthermore, a plurality of detachably connected protective chains are provided within each of the structural door openings.

[0014] Furthermore, the foyer and the stairway compartment are separated by a fireproof bulkhead, and a fire door is provided on the fireproof bulkhead.

[0015] Furthermore, no door panel is provided within the structural door opening.

[0016] When using the ro-ro ship movable deck stairway structure of the present utility model, when the crew enters the stairway from the cargo hold, they can choose the door opening corresponding to the height of the movable deck to enter the outer foyer of the stairway, and then enter the inner platform of the stairway through the small platform, short ladder and fire door. The reverse is also true.

[0017] The ro-ro ship movable deck stairway structure of the present utility model can take into account multiple working heights of the movable deck at the same time, without changing the fire prevention classification level between the stairway and the cargo hold. The crew can pass directly without the need to rely on additional straight ladders. The overall layout is simple and reliable, realizing fast and unobstructed passage between the cargo hold and the stairway compartment. Description of the Drawings

[0018] Figure 1 is a plan view of the ro-ro ship movable deck stairway structure described in the present utility model;

[0019] Figure 2 is a side view of the ro-ro ship movable deck stairway structure described in the present utility model;

[0020] Figure 3 is a plan layout drawing of a conventional vehicle hold stairway;

[0021] Figure 4It is a schematic diagram of a gangway determined by a lower position of the movable deck;

[0022] Figure 5 It is a schematic diagram of a gangway determined by a higher position of the movable deck.

[0023] Among them, 1 - gangway compartment, 2 - foyer, 3 - fireproof bulkhead, 4 - fire door, 5 - cargo hold, 6 - embarkation deck, 7 - dividing bulkhead, 8 - movable deck, 9 - embarkation platform, 10 - short ladder, 11 - protective chain, 71 - structural door opening. Detailed implementation manners

[0024] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0025] As Figure 1 - Figure 2 shown, a movable deck gangway structure of a ro-ro ship includes a gangway compartment 1 and a foyer 2. The foyer 2 is separated from the gangway compartment 1 by a fireproof bulkhead 3, and a fire door 4 is provided on the fireproof bulkhead 3; the foyer 2 is located on one side of the gangway compartment 1 close to the cargo hold 5, and the foyer 2 is located between two adjacent fixed decks 6. The adjacent side of the foyer 2 and the cargo hold 5 is separated by a dividing bulkhead 7, and a plurality of structural door openings 71 with different heights are provided on the dividing bulkhead 7. The heights of the lower ends of the plurality of structural door openings 71 are respectively corresponding to the heights at a plurality of working positions of the movable deck 8 in the cargo hold 5.

[0026] It can be understood that in this embodiment, the fireproof bulkhead 3 and the fire door 4 are moved inwards, and a part of the internal space of the gangway is ceded as the foyer 2. This foyer 2 is separated from the cargo hold 5 by a dividing bulkhead 7. The dividing bulkhead 7 is no longer used as the fireproof boundary surface between the cargo hold 5 and the gangway 1, and can be freely opened without setting a door panel. On the dividing bulkhead 7, a plurality of structural door openings 71 are respectively opened according to different working heights of the movable deck 8, achieving the technical purpose that even when the movable deck 8 docks at different heights, personnel can quickly and freely enter and exit the gangway without tools and without affecting the fire separation of the gangway.

[0027] Furthermore, a connecting structure is provided between two adjacent structural door openings 71. In this embodiment, the connecting structure is located in the foyer 2. Of course, in other embodiments, the connecting structure can also be provided on the outer wall of the foyer 2.

[0028] Specifically, the connection structure includes at least one boarding platform 9 and a short ladder 10. The boarding platform 9 is located inside the lower end of the structure door opening 71. The upper end of the short ladder 10 is connected to the upper boarding platform 9, and the lower end of the short ladder 10 is connected to the lower boarding platform 9 or the lower fixed deck 6 located in the hall 2.

[0029] When there are only two structure door openings 71, the connection structure includes one boarding platform 9 and one short ladder 10. The boarding platform 9 is located inside the lower end face of the upper structure door opening 71. The upper and lower ends of the short ladder 10 are respectively connected to the boarding platform 9 and the boarding deck 6. When there are three or more structure door openings 71, except that no boarding platform 9 is provided at the bottommost structure door opening 71, a boarding platform 9 is provided inside the lower end of each of the other structure door openings 71, and adjacent two boarding platforms 9 are connected by a short ladder 10. With such a setting, even when the movable deck 8 is at a high position, the staff can still reach the fire door 4 in the stairwell 1 through the boarding platform 9 and the short ladder 10. In this embodiment, there are 2 structure door openings 71, and no door panel is provided in the structure door openings 71.

[0030] Furthermore, a plurality of detachably connected protective chains 11 are provided in each of the structure door openings 71. It can be understood that two detachably connected protective chains 11 are installed on the door opening. When people pass through, the protective chains 11 can be quickly detached for passage. At other times, the protective chains 11 will be connected to the door opening to prevent people from accidentally falling through the door opening when the external platform is not at the corresponding height.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A movable deck ladder structure for a ro-ro ship, characterized in that: It includes a stairway room and a foyer, wherein the foyer is located on one side of the stairway room close to the cargo hold, and the foyer is located between the upper and lower fixed decks. The foyer is separated from the adjacent side of the cargo hold by a partition bulkhead, and a plurality of structural door holes with different heights are arranged on the partition bulkhead, and the heights of the lower ends of the plurality of structural door holes are respectively arranged to correspond to the heights of the plurality of working positions of the movable deck in the cargo hold.

2. The movable deck stairway structure of a ro-ro ship according to claim 1, characterized in that: A connecting structure is provided between two upper and lower adjacent structural door holes.

3. The movable deck stairway structure of a ro-ro ship according to claim 2, characterized in that: The communication structure is located in the foyer.

4. The movable deck stairway structure of a ro-ro ship according to claim 3, characterized in that: The connecting structure includes one or two boarding platforms and a short ladder. The boarding platform is located on the inner side of the lower end of the structural door hole, the upper end of the short ladder is connected to the upper boarding platform, and the lower end of the short ladder is connected to the lower boarding platform or the lower boarding deck in the lobby.

5. The movable deck ladder structure of a ro-ro ship according to any one of claims 1 to 4, characterized in that: A plurality of detachably connected protective chains are arranged in each of the structural door holes.

6. The movable deck stairway structure of a ro-ro ship according to claim 5, characterized in that: The lobby and the stairway are separated by a fireproof bulkhead, and a fireproof door is arranged on the fireproof bulkhead.

7. The movable deck stairway structure of a ro-ro ship according to claim 5, characterized in that: No door panel is arranged in the structural door hole.

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