Gas chamber platform escape tower of C-shaped LNG (Liquefied Natural Gas) storage tank

Abstract

The utility model discloses a gas chamber platform escape tower of a C-shaped LNG (Liquefied Natural Gas) storage tank, relates to the technical field of ship LNG storage tank parts, and solves the problems that a plurality of long inclined ladders and platforms are usually required to be moved from a gas chamber platform at the top of the C-shaped LNG storage tank to an upper deck, only one safety channel is provided, and the escape probability of sailors on the gas chamber platform is low. Comprising a tank body base and a truss main body, a C-shaped LNG tank is supported above the tank body base, the lower end of the truss main body is connected to an upper deck, a vertically-arranged straight ladder assembly is connected in the truss main body, a platform support and an inclined ladder support are connected above the C-shaped LNG tank, a horizontal gas chamber platform is connected above the platform support, and a top inclined ladder is connected to the upper side of the inclined ladder support. The upper and lower ends of the top inclined ladder are respectively positioned between the air chamber platform and the straight ladder structure. In order to improve the escape probability, a standby escape channel is added, escape is directly completed from the gas chamber platform along the top inclined ladder and the vertical ladder assembly outside the C-shaped LNG tank, and the effect of improving safety is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of ship LNG storage tank components, and particularly relates to an escape tower for the gas chamber platform of a C-type LNG storage tank. Background Art

[0002] With the continuous adjustment of the global new energy structure and the improvement of environmental protection requirements, as a new type of ship, the LNG dual-fuel ship uses two fuels, namely liquefied natural gas (LNG) and diesel, and can switch between different fuels according to needs. Because it basically realizes zero emissions of SOx and particulate matter, and at the same time effectively reduces the emissions of CO2 and NOx, achieving certain economic and environmental protection effects, it has gradually been widely used and popularized in the industry.

[0003] The main component of liquefied natural gas (LNG) is methane. Through cryogenic refrigeration technology, natural gas is cooled to below -164°C under normal pressure to make it liquefy. Materials such as 9Ni steel and austenitic stainless steel commonly used in the manufacture of C-type tanks control the temperature rise and gasification volume during LNG transportation through measures such as tank insulation technology and spray cooling.

[0004] When the temperature and pressure in the storage tank rise, the LNG liquid will spray out from the safety relief valve (located on the gas chamber platform) on the tank body. Whether it is liquid or gas, it will increase the danger level to the surrounding environment;

[0005] Moving from the gas chamber platform at the top of the C-type LNG storage tank to the upper deck usually requires passing through multiple long inclined ladders and platforms, and there is often only one safety passage. Once a leakage or even a fire occurs, the probability of crew members on the gas chamber platform escaping is relatively low. Content of the Utility Model

[0006] The purpose of the utility model is to provide an escape tower for the gas chamber platform of a C-type LNG storage tank, which adds a spare escape passage to improve the escape probability. It directly completes the escape along the top inclined ladder and straight ladder assembly outside the C-type LNG tank from the gas chamber platform, improving safety.

[0007] The above technical purpose of the utility model is achieved through the following technical solutions:

[0008] An escape tower for the gas chamber platform of a C-type LNG storage tank includes a tank body base and a truss main body. The C-type LNG tank is supported above the tank body base, and the lower end of the truss main body is connected to the upper deck.

[0009] A vertical straight ladder assembly is connected in the truss main body. A platform support and an inclined ladder bracket are connected above the C-shaped LNG tank. A horizontal gas chamber platform is connected above the platform support. The upper side of the inclined ladder bracket is connected with a top inclined ladder, and the upper and lower ends of the top inclined ladder are respectively located between the gas chamber platform and the straight ladder structure.

[0010] Furthermore, the truss main body includes a truss upper platform and a truss intermediate platform.

[0011] Furthermore, the straight ladder assembly includes an upper straight ladder and a lower straight ladder. The upper straight ladder is located between the truss upper platform and the truss intermediate platform, and the lower straight ladder is located below the truss intermediate platform.

[0012] Furthermore, an upper guardrail and a lower guardrail are also connected to the side of the truss main body. The upper guardrail surrounds the upper straight ladder and forms a climbing space for people to go up and down inside with the upper straight ladder. The lower guardrail surrounds the lower straight ladder and forms a climbing space for people to go up and down inside with the lower straight ladder.

[0013] Furthermore, the truss main body includes an upper truss above and a lower truss below. The truss intermediate platform is connected to the upper end of the lower truss, the truss upper platform is connected to the upper end of the upper truss. One side of the truss intermediate platform is connected to the upper truss, and a space for people to stand and climb is left on the other side. The upper straight ladder is located above this space.

[0014] Furthermore, the truss intermediate platform and / or the truss upper platform includes a flip railing. The corresponding straight ladder assembly is connected to one side of the truss main body. The flip railing is located above the corresponding straight ladder assembly. Its flipping positions include an intercept position and a release position, blocking or leaving the direction where the corresponding straight ladder assembly is located on the truss intermediate platform and / or the truss upper platform.

[0015] Furthermore, the truss intermediate platform and / or the truss upper platform also includes a fixed railing. The flip railing blocks the direction where the corresponding straight ladder assembly is located on the truss intermediate platform and / or the truss upper platform, and the fixed railing blocks in the remaining outward directions.

[0016] Furthermore, a number of horizontal chains are connected above the truss intermediate platform and / or the truss upper platform. The chains intercept the direction where the corresponding straight ladder assembly is located on the truss intermediate platform and / or the truss upper platform, and their length allows people to leave the truss intermediate platform / or the truss upper platform outward and enter the corresponding straight ladder assembly downward.

[0017] Furthermore, platform steps are also provided below the lower straight ladder.

[0018] In summary, the present utility model has the following beneficial effects:

[0019] On the other side of the safety passage normally set in the C-type LNG storage tank, the present utility model provides an escape tower, which improves the escape probability in case of emergency such as LNG leakage or fire. That is, the truss main body and the straight ladder are used to quickly move the crew from the gas chamber platform to the upper deck. At the same time, protective structures such as handrails, flip rails and guard rings are also provided to prevent falling accidents of the escaping personnel. The whole escape tower is designed with a simple, compact and safe structure, effectively controlling the cost while meeting the requirements of the shipowner. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Fig. is the general layout drawing of the gas chamber platform escape tower for a C-type LNG storage tank provided by the embodiment of the present utility model.

[0021] Figure 2 Fig. is the structural schematic diagram of the truss intermediate platform part in the gas chamber platform escape tower for a C-type LNG storage tank provided by the embodiment of the present utility model;

[0022] Figure 3 Fig. is the structural schematic diagram of the truss upper platform part in the gas chamber platform escape tower for a C-type LNG storage tank provided by the embodiment of the present utility model.

[0023] In the figure, 1. C-type LNG tank; 2. Tank body base; 3. Upper deck; 4. Gas chamber platform; 5. Platform support; 6. Top inclined ladder; 7. Inclined ladder support; 8. Truss main body; 9. Truss upper platform; 10. Upper straight ladder; 11. Upper guard ring; 12. Truss intermediate platform; 12a. Handrail; 12b. Flip rail; 12c. Fixed rail; 12d. Column; 12e. Chain; 13. Lower straight ladder; 14. Lower guard ring; 15. Platform step. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following further describes the specific embodiments of the present utility model in conjunction with the drawings. The embodiments do not constitute a limitation to the present utility model. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of this application.

[0025] An escape tower for the gas chamber platform of a C-type LNG storage tank, as Figure 1 shown, includes a tank body base 2, on which a C-type LNG tank 1 is supported. Above the C-type LNG tank 1, a platform support 5 and an inclined ladder support 7 are connected. Above the platform support 5, a horizontal gas chamber platform 4 is connected. Above the inclined ladder support 7, a top inclined ladder 6 is connected. Below the top inclined ladder 6, a truss main body 8 is provided. The truss main body 8 is connected to the upper deck 3 below. In the truss main body 8, a straight ladder assembly is welded and fixed. The upper and lower ends of the top inclined ladder 6 are respectively located between the gas chamber platform 4 and the straight ladder structure.

[0026] As Figure 1 shown, the truss main body 8 includes a truss upper platform 9 and a truss middle platform 12; the straight ladder assembly includes an upper straight ladder 10 and a lower straight ladder 13. The upper straight ladder 10 is located between the truss upper platform 9 and the truss middle platform 12, and the lower straight ladder 13 is located below the truss middle platform 12;

[0027] As Figure 2 and Figure 3 shown, the upper guard ring 11 and the lower guard ring 14 are also welded and fixed on the side of the truss main body 8. The upper guard ring 11 surrounds the outside of the upper straight ladder 10 and forms a climbing space for people to go up and down between it and the upper straight ladder 10. The lower guard ring 14 surrounds the outside of the lower straight ladder 13 and forms a climbing space for people to go up and down between it and the lower straight ladder 13. The upper guard ring 11 and the lower guard ring 14 can prevent crew members from falling accidents when climbing the upper straight ladder 10 and the lower straight ladder 13.

[0028] As Figure 1 shown, the truss main body 8 includes an upper truss above and a lower truss below. The truss middle platform 12 is connected to the upper end of the lower truss, and the truss upper platform 9 is connected to the upper end of the upper truss. One side of the truss middle platform 12 is connected to the upper truss, and the other side leaves a space for people to stand and climb. The upper straight ladder 10 is located above this space; while the lower straight ladder 13 is distributed outside one side or multiple sides of the lower truss, that is, multiple lower straight ladders 13 can be set. A platform step 15 is also provided below the lower straight ladder 13. The platform step 15 is fixed to the lower end of the truss main body 8 and / or the upper deck 3, for personnel to climb up and down the lower straight ladder 13 from the platform step 15, climb to the truss middle platform 12, and then climb up the upper straight ladder 10 to the truss upper platform 9, and finally reach the gas chamber platform 4 along the top inclined ladder 6, or in case of emergencies such as LNG leakage or fire, escape in the reverse direction.

[0029] As Figure 3 shown, the truss middle platform 12 includes a handrail 12a, a flipping railing 12b, a fixed railing 12c, and a column 12d. The lower straight ladder 13 is connected to the first side of the lower truss (in this embodiment, the lower straight ladder 13 is on the left or right side of the upper straight ladder 10). The flipping railing 12b is a single rod and is located above the lower straight ladder 13. Its flipping positions include an intercept position and a release position. In this embodiment, its rotating shaft is horizontal and perpendicular to the flipping railing 12b itself. When flipping up from the intercept position to the release position, it blocks or leaves the first side direction of the truss middle platform 12 at the intercept position and the release position. The flipping railing 12b can prevent escape personnel from falling accidents when moving from the truss middle platform 12 to the lower straight ladder 13;

[0030] When it is necessary to enter the lower straight ladder 13, the turning rail 12b turns upward, opening the outward passage for the escape personnel to enter the lower straight ladder 13 downward from the first side of the truss intermediate platform 12. At the same time, after the escape personnel are outside the turning rail 12b, they can lower it downward to reset it. With both hands outside, they can pull on the turning rail 12b as an upper rail. The escape personnel can hold the turning rail 12b with their hands and tentatively step firmly on the lower straight ladder 13 and then go down;

[0031] In some embodiments, the turning rail 12b can be replaced with a fixed inner rail or outer rail. The inner rail allows the escape personnel to hold it from below and drill outwards. The outer rail extends and is fixed outside the first side of the truss intermediate platform 12 to prevent people from falling outwards, improving the sense of security and enhancing the safety of the device in different ways.

[0032] As Figure 3 shown, the turning rail 12b is blocked in the direction of the first side of the truss intermediate platform 12. The fixed rail 12c is L-shaped and is blocked in the remaining outward directions of the truss platform (the opposite side of the first side, the side opposite the upper truss). It can also be set as a C shape, with the inner side fixed to the upper truss to complete the protection and interception outside the truss intermediate platform 12; the column 12d is fixed at a position on the upper truss close to the first side, the handrail 12a is vertically arranged and fixed at a position on the fixed rail 12c close to the first side. The hinged end of the turning rail 12b is above the handrail 12a, and the free end can abut downward on the upper end of the column 12d. A limiting plate can also be fixed outside the upper end of the column 12d or outside the upper truss to limit the outside of the free end of the turning rail 12b; the escape personnel hold the upper turning rail 12b and the left handrail 12a, and then move downward (release the turning rail 12b and fully hold the left handrail 12a), and finally transition to fully entering the lower straight ladder 13;

[0033] Among them, several horizontal chains 12e are also connected above the truss intermediate platform 12 (connected between the fixed rail 12c and the column 12d), intercepting in the direction of the first side of the truss intermediate platform 12. Its length is longer than the distance between the handrail 12a and the column 12d, and the remaining length is only enough for a single person to go downward from the first side of the truss intermediate platform 12 into the lower straight ladder 13, restricting people from falling outward during the downward climbing process and further improving safety; the chain 12e can also be set to have a length equal to the distance between the handrail 12a and the column 12d, and one end of it is detachably connected to the column through structures such as a pin shaft to improve the interception stability of the chain 12e.

[0034] In some other embodiments, the truss upper platform 9 and the truss intermediate platform 12 can adopt the same design to protect and intercept the outside of the truss upper platform 9 through the corresponding handrail 12a, turning rail 12b, fixed rail 12c, and column 12d structures.

[0035] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Those skilled in the art can make various modifications or equivalent substitutions within the essence and protection scope of the present utility model, and such modifications or equivalent substitutions should also be regarded as falling within the protection scope of the technical solution of the present utility model.

Claims

1. An escape tower for the gas chamber platform of a C-type LNG storage tank, characterized in that: It includes a tank body base and a truss main body. A C-type LNG tank is supported above the tank body base, and the lower end of the truss main body is connected to the upper deck. A vertical straight ladder assembly is connected in the truss main body. A platform support and an inclined ladder bracket are connected above the C-type LNG tank. A horizontal gas chamber platform is connected above the platform support. The upper side of the inclined ladder bracket is connected with a top inclined ladder, and the upper and lower ends of the top inclined ladder are respectively located between the gas chamber platform and the straight ladder structure.

2. The gas chamber platform escape tower of a C-type LNG storage tank according to claim 1, characterized in that: The truss main body includes a truss upper platform and a truss middle platform.

3. The escape tower of the gas chamber platform of a C-type LNG storage tank according to claim 2, characterized in that: The straight ladder assembly includes an upper straight ladder and a lower straight ladder. The upper straight ladder is located between the truss upper platform and the truss middle platform, and the lower straight ladder is located below the truss middle platform.

4. The escape tower for the gas chamber platform of a C-type LNG storage tank according to claim 3, characterized in that: Upper and lower guard rings are also connected to the side of the truss main body. The upper guard ring surrounds the upper straight ladder and forms a climbing space for people to go up and down inside with the upper straight ladder. The lower guard ring surrounds the lower straight ladder and forms a climbing space for people to go up and down inside with the lower straight ladder.

5. The escape tower on the gas chamber platform of a C-type LNG storage tank according to claim 3, characterized in that: The truss main body includes an upper truss above and a lower truss below. The truss middle platform is connected to the upper end of the lower truss, the truss upper platform is connected to the upper end of the upper truss. One side of the truss middle platform is connected to the upper truss, and a space for people to stand and climb is left on the other side. The upper straight ladder is located above this space.

6. The escape tower for the gas chamber platform of a C-type LNG storage tank according to claim 3 or 5, characterized in that: The truss middle platform and / or the truss upper platform includes a flip rail. The corresponding straight ladder assembly is connected to one side of the truss main body. The flip rail is located above the corresponding straight ladder assembly, and its flipping positions include an intercept position and a release position, blocking or leaving the direction where the corresponding straight ladder assembly is located on the truss middle platform and / or the truss upper platform.

7. The gas chamber platform escape tower of a C-type LNG storage tank according to claim 6, characterized in that: The truss middle platform and / or the truss upper platform also includes a fixed rail. The flip rail blocks the direction where the corresponding straight ladder assembly is located on the truss middle platform and / or the truss upper platform, and the fixed rail blocks in the remaining outward directions.

8. The escape tower for the gas chamber platform of a C-type LNG storage tank according to claim 6, characterized in that: A number of horizontal chains are connected above the truss middle platform and / or the truss upper platform. The chains intercept the direction where the corresponding straight ladder assembly is located on the truss middle platform and / or the truss upper platform, and their length allows people to leave outward from the truss middle platform / or the truss upper platform and enter the corresponding straight ladder assembly downward.

9. The escape tower on the gas chamber platform of a C-type LNG storage tank according to claim 3, characterized in that: Platform steps are also provided below the lower straight ladder.

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