Connection boarding device for FLNG (floating liquefied natural gas) ship

Abstract

The invention belongs to the field of ship heavy industry, and provides a connection boarding device for an FLNG (floating liquefied natural gas) ship, which comprises a main body structure vertically connected to a deck surface of a stern of the FLNG ship, and a sunken connection station for berthing a bow of a transport ship is arranged on the outer side surface of the main body structure; a ship body embarkation door is arranged on a stern of the FLNG ship, and an embarkation platform is arranged on the top of the main body structure and located in front of the ship body embarkation door. And a ladder structure leading to the boarding platform is arranged on the main body structure. The structural design of the whole device highly conforms to the operation requirements of an FLNG ship and a transport ship, rapid, safe and efficient personnel boarding operation is achieved through accurate positioning of the connection station, an efficient passing path of the ladder structure and convenient arrangement of the boarding platform, and particularly, high adaptability is shown in offshore operation.

Description

Technical Field

[0001] The present invention relates to the field of shipbuilding and heavy industry, and in particular to a docking and boarding device for an FLNG ship. Background Art

[0002] As an advanced offshore natural gas processing and liquefaction platform, FLNG (Floating Liquefied Natural Gas) ships are moored in fixed sea areas all year round for the production, storage and export of natural gas. Due to their long operation cycle, they usually need to be moored in a single area for more than 25 years. Therefore, relying on transport ships for material supply and personnel travel has become a key part of daily operations. However, the currently commonly used boarding methods, such as using rope ladders or aluminum gangplanks, have significant limitations and safety hazards.

[0003] As a traditional means of boarding, the rope ladder has a simple structure but poor stability. Especially when the sea conditions are complex and there is a height difference between the transport ship and the FLNG ship, the rope ladder is prone to instability due to the swaying of the ship or the change in height, which poses a high risk of falling. At the same time, although the aluminum gangway has solved the height difference problem to a certain extent, it is limited by the berthing position of the transport ship and the influence of waves, and its stability is insufficient. The erection and disassembly process of the gangway is cumbersome and inefficient. In long-term operations, these methods not only affect the safety of personnel, but also have a negative impact on operational efficiency, and cannot meet the higher requirements of modern offshore operations for convenience and safety. Summary of the invention

[0004] The present invention discloses a docking and boarding device for an FLNG ship, which is used to solve relevant technical problems in the background technology.

[0005] The technical solution provided by the present invention is as follows: a docking and boarding device for an FLNG ship, comprising: a main structure vertically connected to the stern deck of the FLNG ship, and a concave docking station for berthing the bow of a transport ship is provided on the outer side of the main structure;

[0006] A hull boarding door is provided on the stern of the FLNG ship, and a boarding platform is provided on the top of the main structure, and the boarding platform is in front of the hull boarding door; a ladder structure leading to the boarding platform is provided on the main structure.

[0007] In one embodiment, the docking station is an open structure with one side recessed inward, and the transport ship enters the docking station from the open side; two vertical first fender pipes are arranged at intervals in the docking station from the straight side of the docking station, the first fender pipe is connected to the main structure through a plurality of transverse connecting pipes, and a gap is formed between the two first fender pipes for positioning the bow of the transport ship; vertical second fender pipes are arranged on both sides of the opening of the docking station for contacting the two sides of the bow of the transport ship, and the second fender pipe is connected to the main structure through a plurality of transverse connecting pipes.

[0008] In one implementation manner, the first fender tube, the second fender tube and the main structure are connected with reinforcing ribs.

[0009] In one embodiment, the ladder structure includes: a transfer platform arranged in a main structure with upper and lower spacing, an inclined ladder connected between the transfer platforms, and a straight ladder vertically connected to the transfer platform and close to the docking station side for landing from the docking station to the transfer platform.

[0010] In one implementation mode, the connection station is formed by using a thickened and enlarged fender pipe.

[0011] In one implementation mode, the boarding platform is a square steel grid structure.

[0012] In one implementation mode, the transfer platform is a square steel grating structure.

[0013] In one implementation mode, platform guardrails are provided on the sides of the boarding platform and the transfer platform.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The docking and boarding device of the present invention effectively realizes the stable berthing and connection between the FLNG ship and the transport ship by providing a main structure vertically connected to the stern deck of the FLNG ship and a recessed docking station, provides higher wave impact resistance during offshore operations, solves the problem of unstable connection of traditional climbing ladders in complex marine environments, and thus ensures the safety and reliability of boarding operations.

[0016] (2) The docking and boarding device of the present invention has a structural design that is highly consistent with the operational requirements of FLNG ships and transport ships. Through the precise positioning of the docking station, the efficient passage path of the ladder structure, and the convenient arrangement of the boarding platform, fast, safe, and efficient personnel boarding operations are achieved, especially showing strong adaptability in offshore operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a right side view of the docking and boarding device of the present invention;

[0018] Figure 2 It is a front view of the docking and boarding device of the present invention;

[0019] Figure 3 It is a top view of the docking and boarding device of the present invention.

[0020] The accompanying drawings are marked as follows: 1. FLNG ship; 2. Transport ship; 3. Main structure; 4. Straight ladder; 5. Platform guardrail; 6. Inclined ladder; 7. Boarding platform; 8. Hull boarding door; 9. Transfer platform; 10. Docking station; 11. First fender pipe; 12. Second fender pipe; 13. Connecting pipe; 14. Reinforcement rib. DETAILED DESCRIPTION

[0021] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0022] like Figure 1-3 As shown, the present invention is a docking and boarding device for FLNG ships, including a main structure 3 vertically connected to the stern deck of the FLNG ship 1. The main structure 3 is in the shape of a rectangular frame as a whole, and is firmly connected to the stern deck of the FLNG ship 1 through a thickened support beam to ensure stability and impact resistance in complex marine environments. A recessed docking station 10 is provided on the outer side of the main structure 3, and the docking station 10 is used to berth the bow of the transport ship 2; by providing the main structure 3 vertically connected to the stern deck of the FLNG ship 1 and the recessed docking station 10, the stable berthing and connection between the FLNG ship 1 and the transport ship 2 are effectively achieved, providing a higher wave impact resistance during offshore operations, solving the problem of unstable connection of traditional climbing ladders in complex marine environments, thereby ensuring the safety and reliability of boarding operations.

[0023] A hull boarding door 8 is provided at the stern of the FLNG ship 1 to facilitate the entry and exit of personnel. A boarding platform 7 is provided on the top of the main structure 3, and the boarding platform 7 is located directly in front of the hull boarding door 8 to provide a boarding path for personnel; the boarding platform 7 is provided on the top of the main structure 3 and is connected to the hull boarding door 8, providing a direct and convenient passage path for personnel, further optimizing the boarding operation process between the FLNG ship 1 and the transport ship 2.

[0024] A ladder structure for personnel to pass through is provided inside the main structure 3, so that personnel can move from the docking station 10 to the boarding platform 7. Personnel can easily move from the docking station 10 to the boarding platform 7, solving the inconvenience of passage caused by the height difference. At the same time, the reasonable design of the ladder structure ensures the compactness and stability of the overall device. Specifically:

[0025] The ladder structure includes: a transfer platform 9 arranged horizontally with a vertical spacing inside the main structure 3, an inclined ladder 6 connected between each transfer platform 9, and the uppermost transfer platform 9 is also connected to the boarding platform 7 through an inclined ladder 6, and a straight ladder 4 vertically arranged on the transfer platform 9 and close to the docking station 10 for personnel to enter the main structure 3 from the docking station 10. The design of the ladder structure realizes efficient connection of height differences through a reasonable combination of the transfer platform 9, the inclined ladder 6 and the straight ladder 4, providing a compact and safe passage path. The transfer platform 9 is horizontally distributed inside the main structure, decomposing the large height difference into multiple small gradients, and combined with the inclined connection of the inclined ladder 6, it makes it more natural and smooth for personnel to climb, especially in a complex working environment at sea, significantly reducing the difficulty of passage. The vertical setting of the straight ladder 4 directly connects the docking station 10 with the inside of the main structure 3, which is particularly suitable for the height change caused by the floating of the transport ship 2 due to the waves, ensuring the stability and continuity of personnel passage.

[0026] In addition, the ladder structure has a compact internal layout and occupies a small space. It does not interfere with the normal use of the docking station 10, but also provides more space for the berthing operation of the transport ship 2, thereby enhancing the overall adaptability of the device. Through the multi-layer setting of the transfer platform 9, personnel can take a short break during climbing, which further improves safety. The overall structure is also easy to install and maintain, reducing operating costs, while improving the reliability and service life of the device in marine operations. This design effectively solves the problem of difficult personnel passage between the FLNG ship 1 and the transport ship 2, especially in the face of height differences in complex sea conditions, and demonstrates superior stability and safety.

[0027] In this embodiment, the docking station 10 is designed as an open structure on one side that is concave inward, and the transport ship 2 enters the concave interior through the open side of the docking station 10, thereby achieving precise docking between the transport ship 1 and the main structure 3.

[0028] Two vertical first fender pipes 11 are arranged at intervals in the docking station 10. The first fender pipe 11 is connected to the main structure 3 through a plurality of transverse connecting pipes 13. The connecting pipes 13 are arranged at different heights of the first fender pipe 11 to provide uniform support and a firm connection. The design of the connecting pipe 13 forms a certain gap between the first fender pipe 11 and the main structure 3. The setting of the gap can not only buffer the impact force when the transport ship is berthing, but also avoid the fender pipe directly contacting the main structure 3 and causing wear. The gap between the two first fender pipes 11 is used to position the bow of the transport ship 2 so that it can be stably moored in the docking station 10 and reduce the lateral swing of the transport ship 2 when berthing.

[0029] A vertical second fender pipe 12 is arranged on both sides of the opening of the docking station 10. The second fender pipe 12 is used to directly contact the two sides of the bow of the transport ship 2 to provide lateral support and stability. The second fender pipe 12 is also firmly connected to the main structure 3 through a plurality of transverse connecting pipes 13, thereby ensuring the overall strength and impact resistance of the fender.

[0030] In this embodiment, the first fender tube 11 and the second fender tube 12 of the docking station 10 together form a multi-point support system, which can not only effectively position the bow of the transport ship 2 and reduce the lateral swing of the transport ship 2 when berthing, but also absorb the impact force generated during the berthing process of the transport ship 2 and reduce the wear and deformation of the device. In addition, this design provides a dual lateral and longitudinal stable support for the transport ship 2, greatly improving the safety and reliability of the transport ship 2 in the docking station 10.

[0031] To further enhance the overall rigidity of the first fender tube 11, the second fender tube 12 and the main structure 3, reinforcing ribs 14 are provided between the first fender tube 11, the second fender tube 12 and the main structure 3. The reinforcing ribs 14 are arranged at the intersection of the fender tube and the connecting tube 13, and are tightly welded to the main structure 3. The provision of the reinforcing ribs 14 can effectively disperse the external pressure on the first fender tube 11 and the second fender tube 12, avoid deformation or damage caused by excessive local stress, and thus improve the reliability and durability of the device.

[0032] In this embodiment, both the boarding platform 7 and the transfer platform 9 adopt a square steel grating structure, which has the characteristics of high strength, good anti-slip performance and high drainage efficiency. In order to further improve the safety of personnel, the sides of the boarding platform 7 and each transfer platform 9 are provided with platform guardrails 5, the height and structure of the guardrails meet the marine safety standards to prevent personnel from accidentally falling.

[0033] Working principle:

[0034] When the transport ship 2 berths at the docking station 10 of the FLNG ship 1, the recessed docking station 10 structure provides a precise bow positioning area, ensuring that the transport ship 2 can dock stably under the action of waves. At the same time, the thickened and enlarged fender pipe further absorbs the impact force of the transport ship and protects the integrity of the docking area structure.

[0035] After the docking is completed, the transport ship personnel enter the main structure 3 through the vertical ladder 4 set in the docking station 10. The vertical ladder 4 adapts to the height change of the transport ship 2 floating up and down with the sea water, effectively overcomes the height difference between the FLNG ship 1 and the transport ship 2, and ensures the stability of personnel passage; then, the personnel gradually climb up through the multi-layer transfer platform 9 and the inclined ladder 6 inside the main structure 3. The inclined design of the inclined ladder 6 ensures the comfort and safety of personnel climbing, and the horizontally distributed transfer platform provides a rest and buffer point in the middle of the climb, further improving safety;

[0036] Finally, the personnel pass through the top-level transfer platform 9 and the inclined ladder 6 to reach the boarding platform 7 arranged on the top of the main structure 3, and directly enter the hull boarding door 8 of the FLNG ship 1 from the platform.

[0037] The structural design of the entire device is highly consistent with the operational requirements of the FLNG ship 1 and the transport ship 2. Through the precise positioning of the docking station 10, the efficient passage path of the ladder structure and the convenient arrangement of the boarding platform, fast, safe and efficient personnel boarding operations are achieved, showing strong adaptability in particular in offshore operations.

[0038] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0039] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A docking and boarding device for an FLNG ship, characterized in that: include: A main structure (3) vertically connected to the stern deck of the FLNG ship (1), wherein the outer surface of the main structure (3) is provided with a recessed docking station (10) for berthing the bow of the transport ship (2); The FLNG ship (1) is provided with a hull boarding door (8) at the stern, and a boarding platform (7) is provided on the top of the main structure (3), wherein the boarding platform (7) is in front of the hull boarding door (8); and a ladder structure leading to the boarding platform (7) is provided on the main structure (3).

2. A docking and boarding device for an FLNG ship as claimed in claim 1, characterized in that: The docking station (10) is an open structure with one side recessed inwards, and the transport ship (2) enters the docking station (10) from the open side; two vertical first fender pipes (11) are arranged at intervals on the straight side of the docking station (10) toward the inside of the docking station (10); the first fender pipe (11) is connected to the main structure (3) through a plurality of transverse connecting pipes (13) and forms a gap with the main structure (3); the gap between the two first fender pipes (11) is used to locate the bow of the transport ship (2); vertical second fender pipes (12) are arranged on both sides of the opening of the docking station (10) for contacting the two sides of the bow of the transport ship (2); the second fender pipe (12) is connected to the main structure (3) through a plurality of transverse connecting pipes (13).

3. A docking and boarding device for an FLNG ship as claimed in claim 2, characterized in that: The first fender tube (11), the second fender tube (12) and the main structure (3) are connected with reinforcing ribs (14).

4. The docking and boarding device for FLNG ship according to claim 1, characterized in that: The ladder structure comprises: a transfer platform (9) arranged in the main structure (3) with a vertical spacing, an inclined ladder (6) connected between the transfer platforms (9), and a straight ladder (4) vertically connected to the transfer platform (9) and close to the docking station (10) for landing from the docking station (10) to the transfer platform (9).

5. The docking and boarding device for FLNG ship according to claim 1, characterized in that: The connection station (10) is constructed by using a thickened and enlarged fender pipe.

6. The docking and boarding device for FLNG ship according to claim 1, characterized in that: The boarding platform (7) is a square steel grid structure.

7. The docking and boarding device for FLNG ship according to claim 4, characterized in that: The transfer platform (9) is a square steel grid structure.

8. The docking and boarding device for FLNG ship according to claim 4, characterized in that: The sides of the boarding platform (7) and the transfer platform (9) are both provided with platform guardrails (5).

Images