Straight ladder for FLNG (floating liquefied natural gas) device

Abstract

The utility model relates to a straight ladder for an FLNG (floating liquefied natural gas) device. The straight ladder comprises a first straight ladder (1), a second straight ladder (2), an inter-ladder platform (3) and a structural platform (4), one end of the first vertical ladder (1) is connected with the ground, the other end is connected with the inter-ladder platform (3), one end of the second vertical ladder (2) is connected with the inter-ladder platform (3), and the other end is connected with the structural platform (4); and the ladder room platform (3) is arranged below the structural platform (4) and is connected with the structural platform (4) through a plurality of structural davits (5) which are symmetrically arranged. Compared with the prior art, the utility model has the advantages of simple structure, land saving, stable structure and through passage, and is beneficial to efficient passage.

Description

Technical Field

[0001] The utility model relates to the technical field of FLNG, in particular to a straight ladder for an FLNG device. Background Technique

[0002] The floating liquefied natural gas device is abbreviated as FLNG, which is generally installed on a ship and is a highly integrated device that integrates functions of gas treatment, liquefaction, storage, and loading and unloading. It has high space requirements, convenient inspection, maintenance and repair, and complete safety escape settings. According to the characteristics of FLNG, each process unit is preferably set as a module, which is respectively hoisted to the designated position on the hull. Generally, each module is provided with a ladder, including an inclined ladder staircase and a straight ladder placed at the diagonal position of the inclined ladder to fully meet the escape needs. A reasonable straight ladder setting and form can effectively save land occupation, improve the escape efficiency, make the form unified and beautiful, and reduce the investment cost of the device.

[0003] According to the specifications and project requirements, the height of a single-section ladder should preferably not be greater than 10 m. When the climbing height is greater than 10 m, multi-section ladders should be used. The ladder sections are arranged horizontally in a staggered manner, and ladder landing platforms are provided. The vertical distance between the platforms should preferably be 6 m. In view of the characteristics of the FLNG device, different from land modules or devices, the hull shakes and the structural requirements are relatively high. Generally, the requirements for structural beam columns are higher than those of land modules and devices. The module floor height of the FLNG device is relatively high, and multi-section ladders are widely used in the FLNG device modules.

[0004] However, the existing ladder landing platforms of multi-section straight ladders mostly adopt the support method of generating columns on the ground (i.e., the main process deck or the process platform), resulting in low space utilization. Content of the Utility Model

[0005] The purpose of the utility model is to provide a straight ladder for an FLNG device to improve space utilization.

[0006] The purpose of the utility model can be realized by the following technical solutions: A straight ladder for an FLNG device includes a first straight ladder, a second straight ladder, a ladder landing platform, and a structural platform;

[0007] One end of the first straight ladder is connected to the ground, and the other end is connected to the ladder landing platform. One end of the second straight ladder is connected to the ladder landing platform, and the other end is connected to the structural platform;

[0008] The ladder landing platform is arranged below the structural platform and is connected to the structural platform through a plurality of symmetrically arranged structural suspension columns.

[0009] Preferably, the ladder landing platform includes a ladder landing platform body and a ladder landing platform beam for supporting the ladder landing platform body, and the structural platform includes a structural platform body and a structural platform beam for supporting the structural platform body;

[0010] Both ends of the structural suspension column are respectively connected to the ladder landing platform beam and the structural platform beam.

[0011] Further preferably, one end of the first straight ladder is connected to the ground, and the other end is connected to the landing platform beam.

[0012] Further preferably, one end of the second straight ladder is connected to the landing platform, and the other end is connected to the structural platform beam.

[0013] Further preferably, both the landing platform beam and the structural platform beam are steel sections, and both ends of the structural hanging column are fixedly connected to the landing platform beam and the structural platform beam.

[0014] Further preferably, the structural platform beam is the main structural beam of the FLNG device and is fixed on the main structural column.

[0015] Preferably, the ground is the main process deck or the process platform.

[0016] Preferably, the landing platform is rectangular, and structural hanging columns are respectively arranged at the four corners.

[0017] Further preferably, the length of the landing platform is 1.8 m to 2.5 m, and the width is 0.8 m to 1.3 m.

[0018] Preferably, the first straight ladder and the second straight ladder are vertically arranged and kept in the same plane, and are connected through the landing platform.

[0019] Preferably, through holes for personnel to pass through are respectively opened at the corresponding positions of the landing platform and the structural platform above the first straight ladder and the second straight ladder, and the through holes are opened on the same side of the straight ladders.

[0020] Preferably, protective cages are provided at the upper parts of the first straight ladder and the second straight ladder;

[0021] The protective cage includes a plurality of arc cage hoops arranged at intervals in the vertical direction and vertical rods for connecting the arc cage hoops. The arc cage hoops are horizontally arranged and both ends are connected to the straight ladder, and a crawling passage is formed between the protective cage and the straight ladder.

[0022] Further preferably, the diameter of the lower arc cage hoop is larger than that of the upper arc cage hoop.

[0023] Further preferably, guardrails are provided on the landing platform and the structural platform.

[0024] Even more preferably, notches communicating with the protective cage are opened on the guardrail.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] 1. Through the design of the support method of the landing platform of the utility model by hanging columns, the land occupation can be saved and the space utilization rate can be improved;

[0027] 2. The flight of stairs of the present utility model is located in the same orientation, which can shorten the escape route, improve the escape speed, enhance the guarantee for personnel to escape safely, and gain time for the site to handle and solve problems.

[0028] 3. The structure of the present utility model is simple, saving floor space, having a stable structure, and the passage is unobstructed, which is conducive to efficient passage, ensuring personnel safety, increasing the probability of escape, reducing personnel injuries, and it is convenient to uniformly arrange between each module, being neat and beautiful, enabling the device to operate stably and efficiently.

[0029] 4. On the premise of meeting the requirements of the device and specifications, the straight ladder form of the present utility model has a compact and simple structure, saving floor space, and the landing platform between the ladders is efficiently unobstructed, ensuring the rapid passage of the straight ladder, thus being safer and more practical.

[0030] 5. Under accident conditions, the present utility model can significantly reduce the impact on the entire device, reduce the loss of the device, improve the escape speed, enhance the safety guarantee of the device, and ensure the safety of personnel and the stable and efficient operation of the device.

[0031] 6. The present utility model can adapt to the characteristics of devices such as FLNG with a high degree of modularization, limited space, tight requirements for floor space, and high safety requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic elevation layout view of the present utility model;

[0033] Figure 2 is a schematic plan layout view of the present utility model;

[0034] In the figure: 1 - First straight ladder, 2 - Second straight ladder, 3 - Landing platform, 31 - Landing platform body, 32 - Landing platform beam, 4 - Structural platform, 41 - Structural platform body, 42 - Structural platform beam, 5 - Structural suspension column, 6 - Cage, 7 - Guardrail. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The present utility model will be described in detail below with reference to the drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present utility model, and the detailed implementation manners and specific operation processes are given, but the protection scope of the present utility model is not limited to the following embodiments.

[0036] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0037] Some embodiments of the present utility model will be described in detail below with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0038] Embodiment 1

[0039] A straight ladder for an FLNG device, comprising a first straight ladder 1, a second straight ladder 2, a landing platform 3 and a structural platform 4.

[0040] Wherein, the landing platform 3 is arranged below the structural platform 4 through a plurality of symmetrically arranged structural suspension columns 5. The first straight ladder 1 is arranged vertically, with one end connected to the main process deck and the other end connected to the landing platform 3. The second straight ladder 2 is arranged vertically, with one end connected to the landing platform 3 and the other end connected to the structural platform 4.

[0041] Embodiment 2

[0042] A straight ladder for an FLNG device, the landing platform 3 includes a landing platform body 31 and landing platform beams 32, and the structural platform 4 includes a structural platform body 41 and structural platform beams 42. The landing platform body 31 is arranged on the landing platform beams 32, and a through hole for personnel passage is opened at a corresponding position above the first straight ladder 1. The structural platform body 41 is arranged on the structural platform beams 42, and a through hole for personnel passage is opened at a corresponding position above the second straight ladder 2. The landing platform beams 32 and the structural platform beams 42 are connected by structural suspension columns 5.

[0043] Moreover, in this embodiment, protective cages 6 are provided at the upper parts of the first straight ladder 1 and the second straight ladder 2, and guardrails 7 are provided on the landing platform 3 and the structural platform 4. The rest is the same as in Embodiment 1.

[0044] Embodiment 3

[0045] A straight ladder for an FLNG device, the first ladder section (the first straight ladder 1) starts from the main process deck and goes up to the landing platform 3. The upper end of the first ladder section is fixed to the support steel (landing platform beam 32) of the landing platform 3. The size of the landing platform 3 is required to be not less than 2 square meters according to requirements. The specific recommended dimensions are a length of 1.8m - 2.5m and a width of 0.8m - 1.3m. The support of the landing platform 3 does not come from the main process deck columns, but is changed to be suspended from top to bottom by 4 suspension columns (structural suspension columns 5), making full use of the upper space, saving floor area, and providing convenience for inspection and maintenance, pipeline layout and other operations. The second ladder section (the second straight ladder 2) starts from the landing platform 3 and goes up to the structural platform 4, and the upper end is fixed to the structural platform beam 42, which is firm and reliable. The second ladder section and the first ladder section are on the same plane and are connected through the landing platform 3, allowing for quick passage, improving the escape rate, enhancing the safety guarantee of the device, and achieving the purpose of rapid evacuation. At the same time, the structure is simple and compact, saving investment, and the modules of the whole device are convenient for unified setting, being neat and beautiful.

[0046] Embodiment 4

[0047] A straight ladder for an FLNG device, as Figure 1As shown in the figure, the first flight of stairs (the first straight ladder 1) extends from the ground to the landing platform 3, and then goes up to the structural platform 4 through the second flight of stairs (the second straight ladder 2). The landing platform 3 is fixed by four structural suspension columns 5. The upper ends of the structural suspension columns 5 are fixed to the steel section (structural platform beam 42), and the lower ends are fixed to the landing platform supporting steel section (landing platform beam 32). The lower end of the first flight of stairs is fixed to the ground, and the upper end is fixed to the landing platform supporting steel section (landing platform beam 32). The lower end of the second flight of stairs is fixed to the landing platform 3, and the upper end is fixed to the structural platform supporting steel section (structural platform beam 42).

[0048] FLNG is generally installed on a ship. The mechanical equipment requires a high degree of integration, and the modularization of the equipment is further strengthened to increase flexibility and reliability. This device has high space requirements and needs to take into account inspection, maintenance, and repair at the same time. Saving floor space has a huge impact on investment control. Reasonable layout and optimization of conventional settings can save floor space, save investment, and improve safety protection. In view of this, the following design is made: Modify the original support method of the landing platform, change the columns rooted from the ground to suspension columns, and try to save the floor space of the main process deck or process platform. Only the stairs themselves are rooted on the process deck or process platform to improve the space utilization rate of the process deck or process platform. According to the project requirements and combined with the specifications, the size of the landing platform is not less than 2 square meters. The two flights of stairs are located in the same direction, which can meet the escape requirements to the greatest extent, and can reduce the size of the landing platform and shorten the distance between the flights of stairs, greatly improving the escape speed. For details, see Figure 2 , in this embodiment, after calculation, the length of the landing platform is set to 1.8m - 2.5m, and the width is set to 0.8m - 1.3m, which can not only meet the requirements of the platform size, but also ensure the convenience of the platform and the entire straight ladder.

[0049] In the example listed this time, the length of the landing platform of the FLNG straight ladder is 2.0m, and the width is 1.0m. The structural platform body 41 is 11.5m higher than the main process deck. There are 2 flights of stairs, namely the first flight of stairs and the second flight of stairs. The height of the first flight of stairs is 6m, and the height of the second flight of stairs is 5.5m. The straight ladder is set at the diagonal position of the inclined ladder staircase. The positions and forms of the straight ladders of other modules in the device refer to the settings of this module, with a unified and beautiful form, and it provides convenience for setting up the escape passage.

[0050] Specifically, the straight ladder setting proposed in this embodiment is applicable to various situations where a safety escape straight ladder needs to be set up.

[0051] The utility model is applicable to the fields of FLNG devices, modular devices and petrochemical processing. It can ensure the safety of personnel under special working conditions. The staircase platform is supported by a davit, saving land occupation. The staircase section is located in the same direction, shortening the escape route, increasing the escape speed, improving the guarantee of safe escape for personnel, and gaining time for the site to handle and solve problems. It not only has a simple structure, is neat and beautiful, but also realizes the goals of improving personnel safety guarantee, saving land occupation and reducing investment, achieving the purpose of long-term, stable and efficient operation of the device.

[0052] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present utility model is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present utility model according to the disclosure of the present utility model should be within the protection scope of the present utility model.

Claims

1. A straight ladder for an FLNG device, characterized in that, It includes a first straight ladder (1), a second straight ladder (2), a landing platform (3) and a structural platform (4); One end of the first straight ladder (1) is connected to the ground, and the other end is connected to the landing platform (3). One end of the second straight ladder (2) is connected to the landing platform (3), and the other end is connected to the structural platform (4); The landing platform (3) is arranged below the structural platform (4) and is connected to the structural platform (4) by a plurality of symmetrically arranged structural suspension columns (5).

2. The straight ladder of the FLNG device according to claim 1, characterized in that, The landing platform (3) includes a landing platform body (31) and landing platform beams (32) for supporting the landing platform body (31). The structural platform (4) includes a structural platform body (41) and structural platform beams (42) for supporting the structural platform body (41); Both ends of the structural suspension column (5) are respectively connected to the landing platform beam (32) and the structural platform beam (42).

3. The straight ladder of the FLNG device according to claim 2, characterized in that, Both the landing platform beam (32) and the structural platform beam (42) are steel sections, and both ends of the structural suspension column (5) are fixedly connected to the landing platform beam (32) and the structural platform beam (42).

4. The straight ladder of the FLNG device according to claim 2, characterized in that, The structural platform beam (42) is the main structural beam of the FLNG device and is fixed on the structural main column; The ground is the main process deck or the process platform.

5. The straight ladder of the FLNG device according to claim 1, characterized in that, The landing platform (3) is rectangular, and structural suspension columns (5) are respectively arranged at the four corners.

6. The straight ladder of the FLNG device according to claim 5, characterized in that, The length of the landing platform (3) is 1.8 m to 2.5 m, and the width is 0.8 m to 1.3 m.

7. The straight ladder of the FLNG device according to claim 1, characterized in that, The first straight ladder (1) and the second straight ladder (2) are vertically arranged and remain in the same plane, and are connected through the landing platform (3).

8. The straight ladder of the FLNG device according to claim 1, characterized in that, Through holes for personnel passage are respectively opened at corresponding positions on the upper parts of the landing platform (3) and the structural platform (4) on the same side of the first straight ladder (1) and the second straight ladder (2).

9. The straight ladder of the FLNG device according to claim 1, characterized in that, Guards (6) are provided on the upper parts of the first straight ladder (1) and the second straight ladder (2); The guard (6) includes a plurality of arc-shaped cage hoops arranged at intervals in the vertical direction and vertical rods for connecting the arc-shaped cage hoops. The arc-shaped cage hoops are horizontally arranged and both ends are connected to the straight ladder. The diameter of the lower arc-shaped cage hoop is larger than that of the upper arc-shaped cage hoop.

10. The straight ladder of the FLNG device according to claim 9, characterized in that, Guardrails (7) are provided on the landing platform (3) and the structural platform (4), and notches communicating with the guard (6) are opened on the guardrails (7).

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